1 /* PowerPC-specific support for 32-bit ELF
2 Copyright 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003,
3 2004, 2005 Free Software Foundation, Inc.
4 Written by Ian Lance Taylor, Cygnus Support.
5
6 This file is part of BFD, the Binary File Descriptor library.
7
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2 of the License, or
11 (at your option) any later version.
12
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
17
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the
20 Free Software Foundation, Inc., 51 Franklin Street - Fifth Floor,
21 Boston, MA 02110-1301, USA. */
22
23 /* This file is based on a preliminary PowerPC ELF ABI. The
24 information may not match the final PowerPC ELF ABI. It includes
25 suggestions from the in-progress Embedded PowerPC ABI, and that
26 information may also not match. */
27
28 #include "bfd.h"
29 #include "sysdep.h"
30 #include "bfdlink.h"
31 #include "libbfd.h"
32 #include "elf-bfd.h"
33 #include "elf/ppc.h"
34 #include "elf32-ppc.h"
35 #include "elf-vxworks.h"
36
37 /* RELA relocations are used here. */
38
39 static bfd_reloc_status_type ppc_elf_addr16_ha_reloc
40 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
41 static bfd_reloc_status_type ppc_elf_unhandled_reloc
42 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
43
44 /* Branch prediction bit for branch taken relocs. */
45 #define BRANCH_PREDICT_BIT 0x200000
46 /* Mask to set RA in memory instructions. */
47 #define RA_REGISTER_MASK 0x001f0000
48 /* Value to shift register by to insert RA. */
49 #define RA_REGISTER_SHIFT 16
50
51 /* The name of the dynamic interpreter. This is put in the .interp
52 section. */
53 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
54
55 /* For old-style PLT. */
56 /* The number of single-slot PLT entries (the rest use two slots). */
57 #define PLT_NUM_SINGLE_ENTRIES 8192
58
59 /* For new-style .glink and .plt. */
60 #define GLINK_PLTRESOLVE 16*4
61 #define GLINK_ENTRY_SIZE 4*4
62
63 /* VxWorks uses its own plt layout, filled in by the static linker. */
64
65 /* The standard VxWorks PLT entry. */
66 #define VXWORKS_PLT_ENTRY_SIZE 32
67 static const bfd_vma ppc_elf_vxworks_plt_entry
68 [VXWORKS_PLT_ENTRY_SIZE / 4] =
69 {
70 0x3d800000, /* lis r12,0 */
71 0x818c0000, /* lwz r12,0(r12) */
72 0x7d8903a6, /* mtctr r12 */
73 0x4e800420, /* bctr */
74 0x39600000, /* li r11,0 */
75 0x48000000, /* b 14 <.PLT0resolve+0x4> */
76 0x60000000, /* nop */
77 0x60000000, /* nop */
78 };
79 static const bfd_vma ppc_elf_vxworks_pic_plt_entry
80 [VXWORKS_PLT_ENTRY_SIZE / 4] =
81 {
82 0x3d9e0000, /* addis r12,r30,0 */
83 0x818c0000, /* lwz r12,0(r12) */
84 0x7d8903a6, /* mtctr r12 */
85 0x4e800420, /* bctr */
86 0x39600000, /* li r11,0 */
87 0x48000000, /* b 14 <.PLT0resolve+0x4> 14: R_PPC_REL24 .PLTresolve */
88 0x60000000, /* nop */
89 0x60000000, /* nop */
90 };
91
92 /* The initial VxWorks PLT entry. */
93 #define VXWORKS_PLT_INITIAL_ENTRY_SIZE 32
94 static const bfd_vma ppc_elf_vxworks_plt0_entry
95 [VXWORKS_PLT_INITIAL_ENTRY_SIZE / 4] =
96 {
97 0x3d800000, /* lis r12,0 */
98 0x398c0000, /* addi r12,r12,0 */
99 0x800c0008, /* lwz r0,8(r12) */
100 0x7c0903a6, /* mtctr r0 */
101 0x818c0004, /* lwz r12,4(r12) */
102 0x4e800420, /* bctr */
103 0x60000000, /* nop */
104 0x60000000, /* nop */
105 };
106 static const bfd_vma ppc_elf_vxworks_pic_plt0_entry
107 [VXWORKS_PLT_INITIAL_ENTRY_SIZE / 4] =
108 {
109 0x819e0008, /* lwz r12,8(r30) */
110 0x7d8903a6, /* mtctr r12 */
111 0x819e0004, /* lwz r12,4(r30) */
112 0x4e800420, /* bctr */
113 0x60000000, /* nop */
114 0x60000000, /* nop */
115 0x60000000, /* nop */
116 0x60000000, /* nop */
117 };
118
119 /* For executables, we have some additional relocations in
120 .rela.plt.unloaded, for the kernel loader. */
121
122 /* The number of non-JMP_SLOT relocations per PLT0 slot. */
123 #define VXWORKS_PLT_NON_JMP_SLOT_RELOCS 3
124 /* The number of relocations in the PLTResolve slot. */
125 #define VXWORKS_PLTRESOLVE_RELOCS 2
126 /* The number of relocations in the PLTResolve slot when when creating
127 a shared library. */
128 #define VXWORKS_PLTRESOLVE_RELOCS_SHLIB 0
129
130 /* Some instructions. */
131 #define ADDIS_11_11 0x3d6b0000
132 #define ADDIS_11_30 0x3d7e0000
133 #define ADDIS_12_12 0x3d8c0000
134 #define ADDI_11_11 0x396b0000
135 #define ADD_0_11_11 0x7c0b5a14
136 #define ADD_11_0_11 0x7d605a14
137 #define B 0x48000000
138 #define BCL_20_31 0x429f0005
139 #define BCTR 0x4e800420
140 #define LIS_11 0x3d600000
141 #define LIS_12 0x3d800000
142 #define LWZU_0_12 0x840c0000
143 #define LWZ_0_12 0x800c0000
144 #define LWZ_11_11 0x816b0000
145 #define LWZ_11_30 0x817e0000
146 #define LWZ_12_12 0x818c0000
147 #define MFLR_0 0x7c0802a6
148 #define MFLR_12 0x7d8802a6
149 #define MTCTR_0 0x7c0903a6
150 #define MTCTR_11 0x7d6903a6
151 #define MTLR_0 0x7c0803a6
152 #define NOP 0x60000000
153 #define SUB_11_11_12 0x7d6c5850
154
155 /* Offset of tp and dtp pointers from start of TLS block. */
156 #define TP_OFFSET 0x7000
157 #define DTP_OFFSET 0x8000
158
159 static reloc_howto_type *ppc_elf_howto_table[R_PPC_max];
160
161 static reloc_howto_type ppc_elf_howto_raw[] = {
162 /* This reloc does nothing. */
163 HOWTO (R_PPC_NONE, /* type */
164 0, /* rightshift */
165 2, /* size (0 = byte, 1 = short, 2 = long) */
166 32, /* bitsize */
167 FALSE, /* pc_relative */
168 0, /* bitpos */
169 complain_overflow_bitfield, /* complain_on_overflow */
170 bfd_elf_generic_reloc, /* special_function */
171 "R_PPC_NONE", /* name */
172 FALSE, /* partial_inplace */
173 0, /* src_mask */
174 0, /* dst_mask */
175 FALSE), /* pcrel_offset */
176
177 /* A standard 32 bit relocation. */
178 HOWTO (R_PPC_ADDR32, /* type */
179 0, /* rightshift */
180 2, /* size (0 = byte, 1 = short, 2 = long) */
181 32, /* bitsize */
182 FALSE, /* pc_relative */
183 0, /* bitpos */
184 complain_overflow_bitfield, /* complain_on_overflow */
185 bfd_elf_generic_reloc, /* special_function */
186 "R_PPC_ADDR32", /* name */
187 FALSE, /* partial_inplace */
188 0, /* src_mask */
189 0xffffffff, /* dst_mask */
190 FALSE), /* pcrel_offset */
191
192 /* An absolute 26 bit branch; the lower two bits must be zero.
193 FIXME: we don't check that, we just clear them. */
194 HOWTO (R_PPC_ADDR24, /* type */
195 0, /* rightshift */
196 2, /* size (0 = byte, 1 = short, 2 = long) */
197 26, /* bitsize */
198 FALSE, /* pc_relative */
199 0, /* bitpos */
200 complain_overflow_bitfield, /* complain_on_overflow */
201 bfd_elf_generic_reloc, /* special_function */
202 "R_PPC_ADDR24", /* name */
203 FALSE, /* partial_inplace */
204 0, /* src_mask */
205 0x3fffffc, /* dst_mask */
206 FALSE), /* pcrel_offset */
207
208 /* A standard 16 bit relocation. */
209 HOWTO (R_PPC_ADDR16, /* type */
210 0, /* rightshift */
211 1, /* size (0 = byte, 1 = short, 2 = long) */
212 16, /* bitsize */
213 FALSE, /* pc_relative */
214 0, /* bitpos */
215 complain_overflow_bitfield, /* complain_on_overflow */
216 bfd_elf_generic_reloc, /* special_function */
217 "R_PPC_ADDR16", /* name */
218 FALSE, /* partial_inplace */
219 0, /* src_mask */
220 0xffff, /* dst_mask */
221 FALSE), /* pcrel_offset */
222
223 /* A 16 bit relocation without overflow. */
224 HOWTO (R_PPC_ADDR16_LO, /* type */
225 0, /* rightshift */
226 1, /* size (0 = byte, 1 = short, 2 = long) */
227 16, /* bitsize */
228 FALSE, /* pc_relative */
229 0, /* bitpos */
230 complain_overflow_dont,/* complain_on_overflow */
231 bfd_elf_generic_reloc, /* special_function */
232 "R_PPC_ADDR16_LO", /* name */
233 FALSE, /* partial_inplace */
234 0, /* src_mask */
235 0xffff, /* dst_mask */
236 FALSE), /* pcrel_offset */
237
238 /* The high order 16 bits of an address. */
239 HOWTO (R_PPC_ADDR16_HI, /* type */
240 16, /* rightshift */
241 1, /* size (0 = byte, 1 = short, 2 = long) */
242 16, /* bitsize */
243 FALSE, /* pc_relative */
244 0, /* bitpos */
245 complain_overflow_dont, /* complain_on_overflow */
246 bfd_elf_generic_reloc, /* special_function */
247 "R_PPC_ADDR16_HI", /* name */
248 FALSE, /* partial_inplace */
249 0, /* src_mask */
250 0xffff, /* dst_mask */
251 FALSE), /* pcrel_offset */
252
253 /* The high order 16 bits of an address, plus 1 if the contents of
254 the low 16 bits, treated as a signed number, is negative. */
255 HOWTO (R_PPC_ADDR16_HA, /* type */
256 16, /* rightshift */
257 1, /* size (0 = byte, 1 = short, 2 = long) */
258 16, /* bitsize */
259 FALSE, /* pc_relative */
260 0, /* bitpos */
261 complain_overflow_dont, /* complain_on_overflow */
262 ppc_elf_addr16_ha_reloc, /* special_function */
263 "R_PPC_ADDR16_HA", /* name */
264 FALSE, /* partial_inplace */
265 0, /* src_mask */
266 0xffff, /* dst_mask */
267 FALSE), /* pcrel_offset */
268
269 /* An absolute 16 bit branch; the lower two bits must be zero.
270 FIXME: we don't check that, we just clear them. */
271 HOWTO (R_PPC_ADDR14, /* type */
272 0, /* rightshift */
273 2, /* size (0 = byte, 1 = short, 2 = long) */
274 16, /* bitsize */
275 FALSE, /* pc_relative */
276 0, /* bitpos */
277 complain_overflow_bitfield, /* complain_on_overflow */
278 bfd_elf_generic_reloc, /* special_function */
279 "R_PPC_ADDR14", /* name */
280 FALSE, /* partial_inplace */
281 0, /* src_mask */
282 0xfffc, /* dst_mask */
283 FALSE), /* pcrel_offset */
284
285 /* An absolute 16 bit branch, for which bit 10 should be set to
286 indicate that the branch is expected to be taken. The lower two
287 bits must be zero. */
288 HOWTO (R_PPC_ADDR14_BRTAKEN, /* type */
289 0, /* rightshift */
290 2, /* size (0 = byte, 1 = short, 2 = long) */
291 16, /* bitsize */
292 FALSE, /* pc_relative */
293 0, /* bitpos */
294 complain_overflow_bitfield, /* complain_on_overflow */
295 bfd_elf_generic_reloc, /* special_function */
296 "R_PPC_ADDR14_BRTAKEN",/* name */
297 FALSE, /* partial_inplace */
298 0, /* src_mask */
299 0xfffc, /* dst_mask */
300 FALSE), /* pcrel_offset */
301
302 /* An absolute 16 bit branch, for which bit 10 should be set to
303 indicate that the branch is not expected to be taken. The lower
304 two bits must be zero. */
305 HOWTO (R_PPC_ADDR14_BRNTAKEN, /* type */
306 0, /* rightshift */
307 2, /* size (0 = byte, 1 = short, 2 = long) */
308 16, /* bitsize */
309 FALSE, /* pc_relative */
310 0, /* bitpos */
311 complain_overflow_bitfield, /* complain_on_overflow */
312 bfd_elf_generic_reloc, /* special_function */
313 "R_PPC_ADDR14_BRNTAKEN",/* name */
314 FALSE, /* partial_inplace */
315 0, /* src_mask */
316 0xfffc, /* dst_mask */
317 FALSE), /* pcrel_offset */
318
319 /* A relative 26 bit branch; the lower two bits must be zero. */
320 HOWTO (R_PPC_REL24, /* type */
321 0, /* rightshift */
322 2, /* size (0 = byte, 1 = short, 2 = long) */
323 26, /* bitsize */
324 TRUE, /* pc_relative */
325 0, /* bitpos */
326 complain_overflow_signed, /* complain_on_overflow */
327 bfd_elf_generic_reloc, /* special_function */
328 "R_PPC_REL24", /* name */
329 FALSE, /* partial_inplace */
330 0, /* src_mask */
331 0x3fffffc, /* dst_mask */
332 TRUE), /* pcrel_offset */
333
334 /* A relative 16 bit branch; the lower two bits must be zero. */
335 HOWTO (R_PPC_REL14, /* type */
336 0, /* rightshift */
337 2, /* size (0 = byte, 1 = short, 2 = long) */
338 16, /* bitsize */
339 TRUE, /* pc_relative */
340 0, /* bitpos */
341 complain_overflow_signed, /* complain_on_overflow */
342 bfd_elf_generic_reloc, /* special_function */
343 "R_PPC_REL14", /* name */
344 FALSE, /* partial_inplace */
345 0, /* src_mask */
346 0xfffc, /* dst_mask */
347 TRUE), /* pcrel_offset */
348
349 /* A relative 16 bit branch. Bit 10 should be set to indicate that
350 the branch is expected to be taken. The lower two bits must be
351 zero. */
352 HOWTO (R_PPC_REL14_BRTAKEN, /* type */
353 0, /* rightshift */
354 2, /* size (0 = byte, 1 = short, 2 = long) */
355 16, /* bitsize */
356 TRUE, /* pc_relative */
357 0, /* bitpos */
358 complain_overflow_signed, /* complain_on_overflow */
359 bfd_elf_generic_reloc, /* special_function */
360 "R_PPC_REL14_BRTAKEN", /* name */
361 FALSE, /* partial_inplace */
362 0, /* src_mask */
363 0xfffc, /* dst_mask */
364 TRUE), /* pcrel_offset */
365
366 /* A relative 16 bit branch. Bit 10 should be set to indicate that
367 the branch is not expected to be taken. The lower two bits must
368 be zero. */
369 HOWTO (R_PPC_REL14_BRNTAKEN, /* type */
370 0, /* rightshift */
371 2, /* size (0 = byte, 1 = short, 2 = long) */
372 16, /* bitsize */
373 TRUE, /* pc_relative */
374 0, /* bitpos */
375 complain_overflow_signed, /* complain_on_overflow */
376 bfd_elf_generic_reloc, /* special_function */
377 "R_PPC_REL14_BRNTAKEN",/* name */
378 FALSE, /* partial_inplace */
379 0, /* src_mask */
380 0xfffc, /* dst_mask */
381 TRUE), /* pcrel_offset */
382
383 /* Like R_PPC_ADDR16, but referring to the GOT table entry for the
384 symbol. */
385 HOWTO (R_PPC_GOT16, /* type */
386 0, /* rightshift */
387 1, /* size (0 = byte, 1 = short, 2 = long) */
388 16, /* bitsize */
389 FALSE, /* pc_relative */
390 0, /* bitpos */
391 complain_overflow_signed, /* complain_on_overflow */
392 bfd_elf_generic_reloc, /* special_function */
393 "R_PPC_GOT16", /* name */
394 FALSE, /* partial_inplace */
395 0, /* src_mask */
396 0xffff, /* dst_mask */
397 FALSE), /* pcrel_offset */
398
399 /* Like R_PPC_ADDR16_LO, but referring to the GOT table entry for
400 the symbol. */
401 HOWTO (R_PPC_GOT16_LO, /* type */
402 0, /* rightshift */
403 1, /* size (0 = byte, 1 = short, 2 = long) */
404 16, /* bitsize */
405 FALSE, /* pc_relative */
406 0, /* bitpos */
407 complain_overflow_dont, /* complain_on_overflow */
408 bfd_elf_generic_reloc, /* special_function */
409 "R_PPC_GOT16_LO", /* name */
410 FALSE, /* partial_inplace */
411 0, /* src_mask */
412 0xffff, /* dst_mask */
413 FALSE), /* pcrel_offset */
414
415 /* Like R_PPC_ADDR16_HI, but referring to the GOT table entry for
416 the symbol. */
417 HOWTO (R_PPC_GOT16_HI, /* type */
418 16, /* rightshift */
419 1, /* size (0 = byte, 1 = short, 2 = long) */
420 16, /* bitsize */
421 FALSE, /* pc_relative */
422 0, /* bitpos */
423 complain_overflow_bitfield, /* complain_on_overflow */
424 bfd_elf_generic_reloc, /* special_function */
425 "R_PPC_GOT16_HI", /* name */
426 FALSE, /* partial_inplace */
427 0, /* src_mask */
428 0xffff, /* dst_mask */
429 FALSE), /* pcrel_offset */
430
431 /* Like R_PPC_ADDR16_HA, but referring to the GOT table entry for
432 the symbol. */
433 HOWTO (R_PPC_GOT16_HA, /* type */
434 16, /* rightshift */
435 1, /* size (0 = byte, 1 = short, 2 = long) */
436 16, /* bitsize */
437 FALSE, /* pc_relative */
438 0, /* bitpos */
439 complain_overflow_bitfield, /* complain_on_overflow */
440 ppc_elf_addr16_ha_reloc, /* special_function */
441 "R_PPC_GOT16_HA", /* name */
442 FALSE, /* partial_inplace */
443 0, /* src_mask */
444 0xffff, /* dst_mask */
445 FALSE), /* pcrel_offset */
446
447 /* Like R_PPC_REL24, but referring to the procedure linkage table
448 entry for the symbol. */
449 HOWTO (R_PPC_PLTREL24, /* type */
450 0, /* rightshift */
451 2, /* size (0 = byte, 1 = short, 2 = long) */
452 26, /* bitsize */
453 TRUE, /* pc_relative */
454 0, /* bitpos */
455 complain_overflow_signed, /* complain_on_overflow */
456 bfd_elf_generic_reloc, /* special_function */
457 "R_PPC_PLTREL24", /* name */
458 FALSE, /* partial_inplace */
459 0, /* src_mask */
460 0x3fffffc, /* dst_mask */
461 TRUE), /* pcrel_offset */
462
463 /* This is used only by the dynamic linker. The symbol should exist
464 both in the object being run and in some shared library. The
465 dynamic linker copies the data addressed by the symbol from the
466 shared library into the object, because the object being
467 run has to have the data at some particular address. */
468 HOWTO (R_PPC_COPY, /* type */
469 0, /* rightshift */
470 2, /* size (0 = byte, 1 = short, 2 = long) */
471 32, /* bitsize */
472 FALSE, /* pc_relative */
473 0, /* bitpos */
474 complain_overflow_bitfield, /* complain_on_overflow */
475 bfd_elf_generic_reloc, /* special_function */
476 "R_PPC_COPY", /* name */
477 FALSE, /* partial_inplace */
478 0, /* src_mask */
479 0, /* dst_mask */
480 FALSE), /* pcrel_offset */
481
482 /* Like R_PPC_ADDR32, but used when setting global offset table
483 entries. */
484 HOWTO (R_PPC_GLOB_DAT, /* type */
485 0, /* rightshift */
486 2, /* size (0 = byte, 1 = short, 2 = long) */
487 32, /* bitsize */
488 FALSE, /* pc_relative */
489 0, /* bitpos */
490 complain_overflow_bitfield, /* complain_on_overflow */
491 bfd_elf_generic_reloc, /* special_function */
492 "R_PPC_GLOB_DAT", /* name */
493 FALSE, /* partial_inplace */
494 0, /* src_mask */
495 0xffffffff, /* dst_mask */
496 FALSE), /* pcrel_offset */
497
498 /* Marks a procedure linkage table entry for a symbol. */
499 HOWTO (R_PPC_JMP_SLOT, /* type */
500 0, /* rightshift */
501 2, /* size (0 = byte, 1 = short, 2 = long) */
502 32, /* bitsize */
503 FALSE, /* pc_relative */
504 0, /* bitpos */
505 complain_overflow_bitfield, /* complain_on_overflow */
506 bfd_elf_generic_reloc, /* special_function */
507 "R_PPC_JMP_SLOT", /* name */
508 FALSE, /* partial_inplace */
509 0, /* src_mask */
510 0, /* dst_mask */
511 FALSE), /* pcrel_offset */
512
513 /* Used only by the dynamic linker. When the object is run, this
514 longword is set to the load address of the object, plus the
515 addend. */
516 HOWTO (R_PPC_RELATIVE, /* type */
517 0, /* rightshift */
518 2, /* size (0 = byte, 1 = short, 2 = long) */
519 32, /* bitsize */
520 FALSE, /* pc_relative */
521 0, /* bitpos */
522 complain_overflow_bitfield, /* complain_on_overflow */
523 bfd_elf_generic_reloc, /* special_function */
524 "R_PPC_RELATIVE", /* name */
525 FALSE, /* partial_inplace */
526 0, /* src_mask */
527 0xffffffff, /* dst_mask */
528 FALSE), /* pcrel_offset */
529
530 /* Like R_PPC_REL24, but uses the value of the symbol within the
531 object rather than the final value. Normally used for
532 _GLOBAL_OFFSET_TABLE_. */
533 HOWTO (R_PPC_LOCAL24PC, /* type */
534 0, /* rightshift */
535 2, /* size (0 = byte, 1 = short, 2 = long) */
536 26, /* bitsize */
537 TRUE, /* pc_relative */
538 0, /* bitpos */
539 complain_overflow_signed, /* complain_on_overflow */
540 bfd_elf_generic_reloc, /* special_function */
541 "R_PPC_LOCAL24PC", /* name */
542 FALSE, /* partial_inplace */
543 0, /* src_mask */
544 0x3fffffc, /* dst_mask */
545 TRUE), /* pcrel_offset */
546
547 /* Like R_PPC_ADDR32, but may be unaligned. */
548 HOWTO (R_PPC_UADDR32, /* type */
549 0, /* rightshift */
550 2, /* size (0 = byte, 1 = short, 2 = long) */
551 32, /* bitsize */
552 FALSE, /* pc_relative */
553 0, /* bitpos */
554 complain_overflow_bitfield, /* complain_on_overflow */
555 bfd_elf_generic_reloc, /* special_function */
556 "R_PPC_UADDR32", /* name */
557 FALSE, /* partial_inplace */
558 0, /* src_mask */
559 0xffffffff, /* dst_mask */
560 FALSE), /* pcrel_offset */
561
562 /* Like R_PPC_ADDR16, but may be unaligned. */
563 HOWTO (R_PPC_UADDR16, /* type */
564 0, /* rightshift */
565 1, /* size (0 = byte, 1 = short, 2 = long) */
566 16, /* bitsize */
567 FALSE, /* pc_relative */
568 0, /* bitpos */
569 complain_overflow_bitfield, /* complain_on_overflow */
570 bfd_elf_generic_reloc, /* special_function */
571 "R_PPC_UADDR16", /* name */
572 FALSE, /* partial_inplace */
573 0, /* src_mask */
574 0xffff, /* dst_mask */
575 FALSE), /* pcrel_offset */
576
577 /* 32-bit PC relative */
578 HOWTO (R_PPC_REL32, /* type */
579 0, /* rightshift */
580 2, /* size (0 = byte, 1 = short, 2 = long) */
581 32, /* bitsize */
582 TRUE, /* pc_relative */
583 0, /* bitpos */
584 complain_overflow_bitfield, /* complain_on_overflow */
585 bfd_elf_generic_reloc, /* special_function */
586 "R_PPC_REL32", /* name */
587 FALSE, /* partial_inplace */
588 0, /* src_mask */
589 0xffffffff, /* dst_mask */
590 TRUE), /* pcrel_offset */
591
592 /* 32-bit relocation to the symbol's procedure linkage table.
593 FIXME: not supported. */
594 HOWTO (R_PPC_PLT32, /* type */
595 0, /* rightshift */
596 2, /* size (0 = byte, 1 = short, 2 = long) */
597 32, /* bitsize */
598 FALSE, /* pc_relative */
599 0, /* bitpos */
600 complain_overflow_bitfield, /* complain_on_overflow */
601 bfd_elf_generic_reloc, /* special_function */
602 "R_PPC_PLT32", /* name */
603 FALSE, /* partial_inplace */
604 0, /* src_mask */
605 0, /* dst_mask */
606 FALSE), /* pcrel_offset */
607
608 /* 32-bit PC relative relocation to the symbol's procedure linkage table.
609 FIXME: not supported. */
610 HOWTO (R_PPC_PLTREL32, /* type */
611 0, /* rightshift */
612 2, /* size (0 = byte, 1 = short, 2 = long) */
613 32, /* bitsize */
614 TRUE, /* pc_relative */
615 0, /* bitpos */
616 complain_overflow_bitfield, /* complain_on_overflow */
617 bfd_elf_generic_reloc, /* special_function */
618 "R_PPC_PLTREL32", /* name */
619 FALSE, /* partial_inplace */
620 0, /* src_mask */
621 0, /* dst_mask */
622 TRUE), /* pcrel_offset */
623
624 /* Like R_PPC_ADDR16_LO, but referring to the PLT table entry for
625 the symbol. */
626 HOWTO (R_PPC_PLT16_LO, /* type */
627 0, /* rightshift */
628 1, /* size (0 = byte, 1 = short, 2 = long) */
629 16, /* bitsize */
630 FALSE, /* pc_relative */
631 0, /* bitpos */
632 complain_overflow_dont, /* complain_on_overflow */
633 bfd_elf_generic_reloc, /* special_function */
634 "R_PPC_PLT16_LO", /* name */
635 FALSE, /* partial_inplace */
636 0, /* src_mask */
637 0xffff, /* dst_mask */
638 FALSE), /* pcrel_offset */
639
640 /* Like R_PPC_ADDR16_HI, but referring to the PLT table entry for
641 the symbol. */
642 HOWTO (R_PPC_PLT16_HI, /* type */
643 16, /* rightshift */
644 1, /* size (0 = byte, 1 = short, 2 = long) */
645 16, /* bitsize */
646 FALSE, /* pc_relative */
647 0, /* bitpos */
648 complain_overflow_bitfield, /* complain_on_overflow */
649 bfd_elf_generic_reloc, /* special_function */
650 "R_PPC_PLT16_HI", /* name */
651 FALSE, /* partial_inplace */
652 0, /* src_mask */
653 0xffff, /* dst_mask */
654 FALSE), /* pcrel_offset */
655
656 /* Like R_PPC_ADDR16_HA, but referring to the PLT table entry for
657 the symbol. */
658 HOWTO (R_PPC_PLT16_HA, /* type */
659 16, /* rightshift */
660 1, /* size (0 = byte, 1 = short, 2 = long) */
661 16, /* bitsize */
662 FALSE, /* pc_relative */
663 0, /* bitpos */
664 complain_overflow_bitfield, /* complain_on_overflow */
665 ppc_elf_addr16_ha_reloc, /* special_function */
666 "R_PPC_PLT16_HA", /* name */
667 FALSE, /* partial_inplace */
668 0, /* src_mask */
669 0xffff, /* dst_mask */
670 FALSE), /* pcrel_offset */
671
672 /* A sign-extended 16 bit value relative to _SDA_BASE_, for use with
673 small data items. */
674 HOWTO (R_PPC_SDAREL16, /* type */
675 0, /* rightshift */
676 1, /* size (0 = byte, 1 = short, 2 = long) */
677 16, /* bitsize */
678 FALSE, /* pc_relative */
679 0, /* bitpos */
680 complain_overflow_signed, /* complain_on_overflow */
681 bfd_elf_generic_reloc, /* special_function */
682 "R_PPC_SDAREL16", /* name */
683 FALSE, /* partial_inplace */
684 0, /* src_mask */
685 0xffff, /* dst_mask */
686 FALSE), /* pcrel_offset */
687
688 /* 16-bit section relative relocation. */
689 HOWTO (R_PPC_SECTOFF, /* type */
690 0, /* rightshift */
691 1, /* size (0 = byte, 1 = short, 2 = long) */
692 16, /* bitsize */
693 FALSE, /* pc_relative */
694 0, /* bitpos */
695 complain_overflow_bitfield, /* complain_on_overflow */
696 bfd_elf_generic_reloc, /* special_function */
697 "R_PPC_SECTOFF", /* name */
698 FALSE, /* partial_inplace */
699 0, /* src_mask */
700 0xffff, /* dst_mask */
701 FALSE), /* pcrel_offset */
702
703 /* 16-bit lower half section relative relocation. */
704 HOWTO (R_PPC_SECTOFF_LO, /* type */
705 0, /* rightshift */
706 1, /* size (0 = byte, 1 = short, 2 = long) */
707 16, /* bitsize */
708 FALSE, /* pc_relative */
709 0, /* bitpos */
710 complain_overflow_dont, /* complain_on_overflow */
711 bfd_elf_generic_reloc, /* special_function */
712 "R_PPC_SECTOFF_LO", /* name */
713 FALSE, /* partial_inplace */
714 0, /* src_mask */
715 0xffff, /* dst_mask */
716 FALSE), /* pcrel_offset */
717
718 /* 16-bit upper half section relative relocation. */
719 HOWTO (R_PPC_SECTOFF_HI, /* type */
720 16, /* rightshift */
721 1, /* size (0 = byte, 1 = short, 2 = long) */
722 16, /* bitsize */
723 FALSE, /* pc_relative */
724 0, /* bitpos */
725 complain_overflow_bitfield, /* complain_on_overflow */
726 bfd_elf_generic_reloc, /* special_function */
727 "R_PPC_SECTOFF_HI", /* name */
728 FALSE, /* partial_inplace */
729 0, /* src_mask */
730 0xffff, /* dst_mask */
731 FALSE), /* pcrel_offset */
732
733 /* 16-bit upper half adjusted section relative relocation. */
734 HOWTO (R_PPC_SECTOFF_HA, /* type */
735 16, /* rightshift */
736 1, /* size (0 = byte, 1 = short, 2 = long) */
737 16, /* bitsize */
738 FALSE, /* pc_relative */
739 0, /* bitpos */
740 complain_overflow_bitfield, /* complain_on_overflow */
741 ppc_elf_addr16_ha_reloc, /* special_function */
742 "R_PPC_SECTOFF_HA", /* name */
743 FALSE, /* partial_inplace */
744 0, /* src_mask */
745 0xffff, /* dst_mask */
746 FALSE), /* pcrel_offset */
747
748 /* Marker reloc for TLS. */
749 HOWTO (R_PPC_TLS,
750 0, /* rightshift */
751 2, /* size (0 = byte, 1 = short, 2 = long) */
752 32, /* bitsize */
753 FALSE, /* pc_relative */
754 0, /* bitpos */
755 complain_overflow_dont, /* complain_on_overflow */
756 bfd_elf_generic_reloc, /* special_function */
757 "R_PPC_TLS", /* name */
758 FALSE, /* partial_inplace */
759 0, /* src_mask */
760 0, /* dst_mask */
761 FALSE), /* pcrel_offset */
762
763 /* Computes the load module index of the load module that contains the
764 definition of its TLS sym. */
765 HOWTO (R_PPC_DTPMOD32,
766 0, /* rightshift */
767 2, /* size (0 = byte, 1 = short, 2 = long) */
768 32, /* bitsize */
769 FALSE, /* pc_relative */
770 0, /* bitpos */
771 complain_overflow_dont, /* complain_on_overflow */
772 ppc_elf_unhandled_reloc, /* special_function */
773 "R_PPC_DTPMOD32", /* name */
774 FALSE, /* partial_inplace */
775 0, /* src_mask */
776 0xffffffff, /* dst_mask */
777 FALSE), /* pcrel_offset */
778
779 /* Computes a dtv-relative displacement, the difference between the value
780 of sym+add and the base address of the thread-local storage block that
781 contains the definition of sym, minus 0x8000. */
782 HOWTO (R_PPC_DTPREL32,
783 0, /* rightshift */
784 2, /* size (0 = byte, 1 = short, 2 = long) */
785 32, /* bitsize */
786 FALSE, /* pc_relative */
787 0, /* bitpos */
788 complain_overflow_dont, /* complain_on_overflow */
789 ppc_elf_unhandled_reloc, /* special_function */
790 "R_PPC_DTPREL32", /* name */
791 FALSE, /* partial_inplace */
792 0, /* src_mask */
793 0xffffffff, /* dst_mask */
794 FALSE), /* pcrel_offset */
795
796 /* A 16 bit dtprel reloc. */
797 HOWTO (R_PPC_DTPREL16,
798 0, /* rightshift */
799 1, /* size (0 = byte, 1 = short, 2 = long) */
800 16, /* bitsize */
801 FALSE, /* pc_relative */
802 0, /* bitpos */
803 complain_overflow_signed, /* complain_on_overflow */
804 ppc_elf_unhandled_reloc, /* special_function */
805 "R_PPC_DTPREL16", /* name */
806 FALSE, /* partial_inplace */
807 0, /* src_mask */
808 0xffff, /* dst_mask */
809 FALSE), /* pcrel_offset */
810
811 /* Like DTPREL16, but no overflow. */
812 HOWTO (R_PPC_DTPREL16_LO,
813 0, /* rightshift */
814 1, /* size (0 = byte, 1 = short, 2 = long) */
815 16, /* bitsize */
816 FALSE, /* pc_relative */
817 0, /* bitpos */
818 complain_overflow_dont, /* complain_on_overflow */
819 ppc_elf_unhandled_reloc, /* special_function */
820 "R_PPC_DTPREL16_LO", /* name */
821 FALSE, /* partial_inplace */
822 0, /* src_mask */
823 0xffff, /* dst_mask */
824 FALSE), /* pcrel_offset */
825
826 /* Like DTPREL16_LO, but next higher group of 16 bits. */
827 HOWTO (R_PPC_DTPREL16_HI,
828 16, /* rightshift */
829 1, /* size (0 = byte, 1 = short, 2 = long) */
830 16, /* bitsize */
831 FALSE, /* pc_relative */
832 0, /* bitpos */
833 complain_overflow_dont, /* complain_on_overflow */
834 ppc_elf_unhandled_reloc, /* special_function */
835 "R_PPC_DTPREL16_HI", /* name */
836 FALSE, /* partial_inplace */
837 0, /* src_mask */
838 0xffff, /* dst_mask */
839 FALSE), /* pcrel_offset */
840
841 /* Like DTPREL16_HI, but adjust for low 16 bits. */
842 HOWTO (R_PPC_DTPREL16_HA,
843 16, /* rightshift */
844 1, /* size (0 = byte, 1 = short, 2 = long) */
845 16, /* bitsize */
846 FALSE, /* pc_relative */
847 0, /* bitpos */
848 complain_overflow_dont, /* complain_on_overflow */
849 ppc_elf_unhandled_reloc, /* special_function */
850 "R_PPC_DTPREL16_HA", /* name */
851 FALSE, /* partial_inplace */
852 0, /* src_mask */
853 0xffff, /* dst_mask */
854 FALSE), /* pcrel_offset */
855
856 /* Computes a tp-relative displacement, the difference between the value of
857 sym+add and the value of the thread pointer (r13). */
858 HOWTO (R_PPC_TPREL32,
859 0, /* rightshift */
860 2, /* size (0 = byte, 1 = short, 2 = long) */
861 32, /* bitsize */
862 FALSE, /* pc_relative */
863 0, /* bitpos */
864 complain_overflow_dont, /* complain_on_overflow */
865 ppc_elf_unhandled_reloc, /* special_function */
866 "R_PPC_TPREL32", /* name */
867 FALSE, /* partial_inplace */
868 0, /* src_mask */
869 0xffffffff, /* dst_mask */
870 FALSE), /* pcrel_offset */
871
872 /* A 16 bit tprel reloc. */
873 HOWTO (R_PPC_TPREL16,
874 0, /* rightshift */
875 1, /* size (0 = byte, 1 = short, 2 = long) */
876 16, /* bitsize */
877 FALSE, /* pc_relative */
878 0, /* bitpos */
879 complain_overflow_signed, /* complain_on_overflow */
880 ppc_elf_unhandled_reloc, /* special_function */
881 "R_PPC_TPREL16", /* name */
882 FALSE, /* partial_inplace */
883 0, /* src_mask */
884 0xffff, /* dst_mask */
885 FALSE), /* pcrel_offset */
886
887 /* Like TPREL16, but no overflow. */
888 HOWTO (R_PPC_TPREL16_LO,
889 0, /* rightshift */
890 1, /* size (0 = byte, 1 = short, 2 = long) */
891 16, /* bitsize */
892 FALSE, /* pc_relative */
893 0, /* bitpos */
894 complain_overflow_dont, /* complain_on_overflow */
895 ppc_elf_unhandled_reloc, /* special_function */
896 "R_PPC_TPREL16_LO", /* name */
897 FALSE, /* partial_inplace */
898 0, /* src_mask */
899 0xffff, /* dst_mask */
900 FALSE), /* pcrel_offset */
901
902 /* Like TPREL16_LO, but next higher group of 16 bits. */
903 HOWTO (R_PPC_TPREL16_HI,
904 16, /* rightshift */
905 1, /* size (0 = byte, 1 = short, 2 = long) */
906 16, /* bitsize */
907 FALSE, /* pc_relative */
908 0, /* bitpos */
909 complain_overflow_dont, /* complain_on_overflow */
910 ppc_elf_unhandled_reloc, /* special_function */
911 "R_PPC_TPREL16_HI", /* name */
912 FALSE, /* partial_inplace */
913 0, /* src_mask */
914 0xffff, /* dst_mask */
915 FALSE), /* pcrel_offset */
916
917 /* Like TPREL16_HI, but adjust for low 16 bits. */
918 HOWTO (R_PPC_TPREL16_HA,
919 16, /* rightshift */
920 1, /* size (0 = byte, 1 = short, 2 = long) */
921 16, /* bitsize */
922 FALSE, /* pc_relative */
923 0, /* bitpos */
924 complain_overflow_dont, /* complain_on_overflow */
925 ppc_elf_unhandled_reloc, /* special_function */
926 "R_PPC_TPREL16_HA", /* name */
927 FALSE, /* partial_inplace */
928 0, /* src_mask */
929 0xffff, /* dst_mask */
930 FALSE), /* pcrel_offset */
931
932 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
933 with values (sym+add)@dtpmod and (sym+add)@dtprel, and computes the offset
934 to the first entry. */
935 HOWTO (R_PPC_GOT_TLSGD16,
936 0, /* rightshift */
937 1, /* size (0 = byte, 1 = short, 2 = long) */
938 16, /* bitsize */
939 FALSE, /* pc_relative */
940 0, /* bitpos */
941 complain_overflow_signed, /* complain_on_overflow */
942 ppc_elf_unhandled_reloc, /* special_function */
943 "R_PPC_GOT_TLSGD16", /* name */
944 FALSE, /* partial_inplace */
945 0, /* src_mask */
946 0xffff, /* dst_mask */
947 FALSE), /* pcrel_offset */
948
949 /* Like GOT_TLSGD16, but no overflow. */
950 HOWTO (R_PPC_GOT_TLSGD16_LO,
951 0, /* rightshift */
952 1, /* size (0 = byte, 1 = short, 2 = long) */
953 16, /* bitsize */
954 FALSE, /* pc_relative */
955 0, /* bitpos */
956 complain_overflow_dont, /* complain_on_overflow */
957 ppc_elf_unhandled_reloc, /* special_function */
958 "R_PPC_GOT_TLSGD16_LO", /* name */
959 FALSE, /* partial_inplace */
960 0, /* src_mask */
961 0xffff, /* dst_mask */
962 FALSE), /* pcrel_offset */
963
964 /* Like GOT_TLSGD16_LO, but next higher group of 16 bits. */
965 HOWTO (R_PPC_GOT_TLSGD16_HI,
966 16, /* rightshift */
967 1, /* size (0 = byte, 1 = short, 2 = long) */
968 16, /* bitsize */
969 FALSE, /* pc_relative */
970 0, /* bitpos */
971 complain_overflow_dont, /* complain_on_overflow */
972 ppc_elf_unhandled_reloc, /* special_function */
973 "R_PPC_GOT_TLSGD16_HI", /* name */
974 FALSE, /* partial_inplace */
975 0, /* src_mask */
976 0xffff, /* dst_mask */
977 FALSE), /* pcrel_offset */
978
979 /* Like GOT_TLSGD16_HI, but adjust for low 16 bits. */
980 HOWTO (R_PPC_GOT_TLSGD16_HA,
981 16, /* rightshift */
982 1, /* size (0 = byte, 1 = short, 2 = long) */
983 16, /* bitsize */
984 FALSE, /* pc_relative */
985 0, /* bitpos */
986 complain_overflow_dont, /* complain_on_overflow */
987 ppc_elf_unhandled_reloc, /* special_function */
988 "R_PPC_GOT_TLSGD16_HA", /* name */
989 FALSE, /* partial_inplace */
990 0, /* src_mask */
991 0xffff, /* dst_mask */
992 FALSE), /* pcrel_offset */
993
994 /* Allocates two contiguous entries in the GOT to hold a tls_index structure,
995 with values (sym+add)@dtpmod and zero, and computes the offset to the
996 first entry. */
997 HOWTO (R_PPC_GOT_TLSLD16,
998 0, /* rightshift */
999 1, /* size (0 = byte, 1 = short, 2 = long) */
1000 16, /* bitsize */
1001 FALSE, /* pc_relative */
1002 0, /* bitpos */
1003 complain_overflow_signed, /* complain_on_overflow */
1004 ppc_elf_unhandled_reloc, /* special_function */
1005 "R_PPC_GOT_TLSLD16", /* name */
1006 FALSE, /* partial_inplace */
1007 0, /* src_mask */
1008 0xffff, /* dst_mask */
1009 FALSE), /* pcrel_offset */
1010
1011 /* Like GOT_TLSLD16, but no overflow. */
1012 HOWTO (R_PPC_GOT_TLSLD16_LO,
1013 0, /* rightshift */
1014 1, /* size (0 = byte, 1 = short, 2 = long) */
1015 16, /* bitsize */
1016 FALSE, /* pc_relative */
1017 0, /* bitpos */
1018 complain_overflow_dont, /* complain_on_overflow */
1019 ppc_elf_unhandled_reloc, /* special_function */
1020 "R_PPC_GOT_TLSLD16_LO", /* name */
1021 FALSE, /* partial_inplace */
1022 0, /* src_mask */
1023 0xffff, /* dst_mask */
1024 FALSE), /* pcrel_offset */
1025
1026 /* Like GOT_TLSLD16_LO, but next higher group of 16 bits. */
1027 HOWTO (R_PPC_GOT_TLSLD16_HI,
1028 16, /* rightshift */
1029 1, /* size (0 = byte, 1 = short, 2 = long) */
1030 16, /* bitsize */
1031 FALSE, /* pc_relative */
1032 0, /* bitpos */
1033 complain_overflow_dont, /* complain_on_overflow */
1034 ppc_elf_unhandled_reloc, /* special_function */
1035 "R_PPC_GOT_TLSLD16_HI", /* name */
1036 FALSE, /* partial_inplace */
1037 0, /* src_mask */
1038 0xffff, /* dst_mask */
1039 FALSE), /* pcrel_offset */
1040
1041 /* Like GOT_TLSLD16_HI, but adjust for low 16 bits. */
1042 HOWTO (R_PPC_GOT_TLSLD16_HA,
1043 16, /* rightshift */
1044 1, /* size (0 = byte, 1 = short, 2 = long) */
1045 16, /* bitsize */
1046 FALSE, /* pc_relative */
1047 0, /* bitpos */
1048 complain_overflow_dont, /* complain_on_overflow */
1049 ppc_elf_unhandled_reloc, /* special_function */
1050 "R_PPC_GOT_TLSLD16_HA", /* name */
1051 FALSE, /* partial_inplace */
1052 0, /* src_mask */
1053 0xffff, /* dst_mask */
1054 FALSE), /* pcrel_offset */
1055
1056 /* Allocates an entry in the GOT with value (sym+add)@dtprel, and computes
1057 the offset to the entry. */
1058 HOWTO (R_PPC_GOT_DTPREL16,
1059 0, /* rightshift */
1060 1, /* size (0 = byte, 1 = short, 2 = long) */
1061 16, /* bitsize */
1062 FALSE, /* pc_relative */
1063 0, /* bitpos */
1064 complain_overflow_signed, /* complain_on_overflow */
1065 ppc_elf_unhandled_reloc, /* special_function */
1066 "R_PPC_GOT_DTPREL16", /* name */
1067 FALSE, /* partial_inplace */
1068 0, /* src_mask */
1069 0xffff, /* dst_mask */
1070 FALSE), /* pcrel_offset */
1071
1072 /* Like GOT_DTPREL16, but no overflow. */
1073 HOWTO (R_PPC_GOT_DTPREL16_LO,
1074 0, /* rightshift */
1075 1, /* size (0 = byte, 1 = short, 2 = long) */
1076 16, /* bitsize */
1077 FALSE, /* pc_relative */
1078 0, /* bitpos */
1079 complain_overflow_dont, /* complain_on_overflow */
1080 ppc_elf_unhandled_reloc, /* special_function */
1081 "R_PPC_GOT_DTPREL16_LO", /* name */
1082 FALSE, /* partial_inplace */
1083 0, /* src_mask */
1084 0xffff, /* dst_mask */
1085 FALSE), /* pcrel_offset */
1086
1087 /* Like GOT_DTPREL16_LO, but next higher group of 16 bits. */
1088 HOWTO (R_PPC_GOT_DTPREL16_HI,
1089 16, /* rightshift */
1090 1, /* size (0 = byte, 1 = short, 2 = long) */
1091 16, /* bitsize */
1092 FALSE, /* pc_relative */
1093 0, /* bitpos */
1094 complain_overflow_dont, /* complain_on_overflow */
1095 ppc_elf_unhandled_reloc, /* special_function */
1096 "R_PPC_GOT_DTPREL16_HI", /* name */
1097 FALSE, /* partial_inplace */
1098 0, /* src_mask */
1099 0xffff, /* dst_mask */
1100 FALSE), /* pcrel_offset */
1101
1102 /* Like GOT_DTPREL16_HI, but adjust for low 16 bits. */
1103 HOWTO (R_PPC_GOT_DTPREL16_HA,
1104 16, /* rightshift */
1105 1, /* size (0 = byte, 1 = short, 2 = long) */
1106 16, /* bitsize */
1107 FALSE, /* pc_relative */
1108 0, /* bitpos */
1109 complain_overflow_dont, /* complain_on_overflow */
1110 ppc_elf_unhandled_reloc, /* special_function */
1111 "R_PPC_GOT_DTPREL16_HA", /* name */
1112 FALSE, /* partial_inplace */
1113 0, /* src_mask */
1114 0xffff, /* dst_mask */
1115 FALSE), /* pcrel_offset */
1116
1117 /* Allocates an entry in the GOT with value (sym+add)@tprel, and computes the
1118 offset to the entry. */
1119 HOWTO (R_PPC_GOT_TPREL16,
1120 0, /* rightshift */
1121 1, /* size (0 = byte, 1 = short, 2 = long) */
1122 16, /* bitsize */
1123 FALSE, /* pc_relative */
1124 0, /* bitpos */
1125 complain_overflow_signed, /* complain_on_overflow */
1126 ppc_elf_unhandled_reloc, /* special_function */
1127 "R_PPC_GOT_TPREL16", /* name */
1128 FALSE, /* partial_inplace */
1129 0, /* src_mask */
1130 0xffff, /* dst_mask */
1131 FALSE), /* pcrel_offset */
1132
1133 /* Like GOT_TPREL16, but no overflow. */
1134 HOWTO (R_PPC_GOT_TPREL16_LO,
1135 0, /* rightshift */
1136 1, /* size (0 = byte, 1 = short, 2 = long) */
1137 16, /* bitsize */
1138 FALSE, /* pc_relative */
1139 0, /* bitpos */
1140 complain_overflow_dont, /* complain_on_overflow */
1141 ppc_elf_unhandled_reloc, /* special_function */
1142 "R_PPC_GOT_TPREL16_LO", /* name */
1143 FALSE, /* partial_inplace */
1144 0, /* src_mask */
1145 0xffff, /* dst_mask */
1146 FALSE), /* pcrel_offset */
1147
1148 /* Like GOT_TPREL16_LO, but next higher group of 16 bits. */
1149 HOWTO (R_PPC_GOT_TPREL16_HI,
1150 16, /* rightshift */
1151 1, /* size (0 = byte, 1 = short, 2 = long) */
1152 16, /* bitsize */
1153 FALSE, /* pc_relative */
1154 0, /* bitpos */
1155 complain_overflow_dont, /* complain_on_overflow */
1156 ppc_elf_unhandled_reloc, /* special_function */
1157 "R_PPC_GOT_TPREL16_HI", /* name */
1158 FALSE, /* partial_inplace */
1159 0, /* src_mask */
1160 0xffff, /* dst_mask */
1161 FALSE), /* pcrel_offset */
1162
1163 /* Like GOT_TPREL16_HI, but adjust for low 16 bits. */
1164 HOWTO (R_PPC_GOT_TPREL16_HA,
1165 16, /* rightshift */
1166 1, /* size (0 = byte, 1 = short, 2 = long) */
1167 16, /* bitsize */
1168 FALSE, /* pc_relative */
1169 0, /* bitpos */
1170 complain_overflow_dont, /* complain_on_overflow */
1171 ppc_elf_unhandled_reloc, /* special_function */
1172 "R_PPC_GOT_TPREL16_HA", /* name */
1173 FALSE, /* partial_inplace */
1174 0, /* src_mask */
1175 0xffff, /* dst_mask */
1176 FALSE), /* pcrel_offset */
1177
1178 /* The remaining relocs are from the Embedded ELF ABI, and are not
1179 in the SVR4 ELF ABI. */
1180
1181 /* 32 bit value resulting from the addend minus the symbol. */
1182 HOWTO (R_PPC_EMB_NADDR32, /* type */
1183 0, /* rightshift */
1184 2, /* size (0 = byte, 1 = short, 2 = long) */
1185 32, /* bitsize */
1186 FALSE, /* pc_relative */
1187 0, /* bitpos */
1188 complain_overflow_bitfield, /* complain_on_overflow */
1189 bfd_elf_generic_reloc, /* special_function */
1190 "R_PPC_EMB_NADDR32", /* name */
1191 FALSE, /* partial_inplace */
1192 0, /* src_mask */
1193 0xffffffff, /* dst_mask */
1194 FALSE), /* pcrel_offset */
1195
1196 /* 16 bit value resulting from the addend minus the symbol. */
1197 HOWTO (R_PPC_EMB_NADDR16, /* type */
1198 0, /* rightshift */
1199 1, /* size (0 = byte, 1 = short, 2 = long) */
1200 16, /* bitsize */
1201 FALSE, /* pc_relative */
1202 0, /* bitpos */
1203 complain_overflow_bitfield, /* complain_on_overflow */
1204 bfd_elf_generic_reloc, /* special_function */
1205 "R_PPC_EMB_NADDR16", /* name */
1206 FALSE, /* partial_inplace */
1207 0, /* src_mask */
1208 0xffff, /* dst_mask */
1209 FALSE), /* pcrel_offset */
1210
1211 /* 16 bit value resulting from the addend minus the symbol. */
1212 HOWTO (R_PPC_EMB_NADDR16_LO, /* type */
1213 0, /* rightshift */
1214 1, /* size (0 = byte, 1 = short, 2 = long) */
1215 16, /* bitsize */
1216 FALSE, /* pc_relative */
1217 0, /* bitpos */
1218 complain_overflow_dont,/* complain_on_overflow */
1219 bfd_elf_generic_reloc, /* special_function */
1220 "R_PPC_EMB_ADDR16_LO", /* name */
1221 FALSE, /* partial_inplace */
1222 0, /* src_mask */
1223 0xffff, /* dst_mask */
1224 FALSE), /* pcrel_offset */
1225
1226 /* The high order 16 bits of the addend minus the symbol. */
1227 HOWTO (R_PPC_EMB_NADDR16_HI, /* type */
1228 16, /* rightshift */
1229 1, /* size (0 = byte, 1 = short, 2 = long) */
1230 16, /* bitsize */
1231 FALSE, /* pc_relative */
1232 0, /* bitpos */
1233 complain_overflow_dont, /* complain_on_overflow */
1234 bfd_elf_generic_reloc, /* special_function */
1235 "R_PPC_EMB_NADDR16_HI", /* name */
1236 FALSE, /* partial_inplace */
1237 0, /* src_mask */
1238 0xffff, /* dst_mask */
1239 FALSE), /* pcrel_offset */
1240
1241 /* The high order 16 bits of the result of the addend minus the address,
1242 plus 1 if the contents of the low 16 bits, treated as a signed number,
1243 is negative. */
1244 HOWTO (R_PPC_EMB_NADDR16_HA, /* type */
1245 16, /* rightshift */
1246 1, /* size (0 = byte, 1 = short, 2 = long) */
1247 16, /* bitsize */
1248 FALSE, /* pc_relative */
1249 0, /* bitpos */
1250 complain_overflow_dont, /* complain_on_overflow */
1251 ppc_elf_addr16_ha_reloc, /* special_function */
1252 "R_PPC_EMB_NADDR16_HA", /* name */
1253 FALSE, /* partial_inplace */
1254 0, /* src_mask */
1255 0xffff, /* dst_mask */
1256 FALSE), /* pcrel_offset */
1257
1258 /* 16 bit value resulting from allocating a 4 byte word to hold an
1259 address in the .sdata section, and returning the offset from
1260 _SDA_BASE_ for that relocation. */
1261 HOWTO (R_PPC_EMB_SDAI16, /* type */
1262 0, /* rightshift */
1263 1, /* size (0 = byte, 1 = short, 2 = long) */
1264 16, /* bitsize */
1265 FALSE, /* pc_relative */
1266 0, /* bitpos */
1267 complain_overflow_bitfield, /* complain_on_overflow */
1268 bfd_elf_generic_reloc, /* special_function */
1269 "R_PPC_EMB_SDAI16", /* name */
1270 FALSE, /* partial_inplace */
1271 0, /* src_mask */
1272 0xffff, /* dst_mask */
1273 FALSE), /* pcrel_offset */
1274
1275 /* 16 bit value resulting from allocating a 4 byte word to hold an
1276 address in the .sdata2 section, and returning the offset from
1277 _SDA2_BASE_ for that relocation. */
1278 HOWTO (R_PPC_EMB_SDA2I16, /* type */
1279 0, /* rightshift */
1280 1, /* size (0 = byte, 1 = short, 2 = long) */
1281 16, /* bitsize */
1282 FALSE, /* pc_relative */
1283 0, /* bitpos */
1284 complain_overflow_bitfield, /* complain_on_overflow */
1285 bfd_elf_generic_reloc, /* special_function */
1286 "R_PPC_EMB_SDA2I16", /* name */
1287 FALSE, /* partial_inplace */
1288 0, /* src_mask */
1289 0xffff, /* dst_mask */
1290 FALSE), /* pcrel_offset */
1291
1292 /* A sign-extended 16 bit value relative to _SDA2_BASE_, for use with
1293 small data items. */
1294 HOWTO (R_PPC_EMB_SDA2REL, /* type */
1295 0, /* rightshift */
1296 1, /* size (0 = byte, 1 = short, 2 = long) */
1297 16, /* bitsize */
1298 FALSE, /* pc_relative */
1299 0, /* bitpos */
1300 complain_overflow_signed, /* complain_on_overflow */
1301 bfd_elf_generic_reloc, /* special_function */
1302 "R_PPC_EMB_SDA2REL", /* name */
1303 FALSE, /* partial_inplace */
1304 0, /* src_mask */
1305 0xffff, /* dst_mask */
1306 FALSE), /* pcrel_offset */
1307
1308 /* Relocate against either _SDA_BASE_ or _SDA2_BASE_, filling in the 16 bit
1309 signed offset from the appropriate base, and filling in the register
1310 field with the appropriate register (0, 2, or 13). */
1311 HOWTO (R_PPC_EMB_SDA21, /* type */
1312 0, /* rightshift */
1313 2, /* size (0 = byte, 1 = short, 2 = long) */
1314 16, /* bitsize */
1315 FALSE, /* pc_relative */
1316 0, /* bitpos */
1317 complain_overflow_signed, /* complain_on_overflow */
1318 bfd_elf_generic_reloc, /* special_function */
1319 "R_PPC_EMB_SDA21", /* name */
1320 FALSE, /* partial_inplace */
1321 0, /* src_mask */
1322 0xffff, /* dst_mask */
1323 FALSE), /* pcrel_offset */
1324
1325 /* Relocation not handled: R_PPC_EMB_MRKREF */
1326 /* Relocation not handled: R_PPC_EMB_RELSEC16 */
1327 /* Relocation not handled: R_PPC_EMB_RELST_LO */
1328 /* Relocation not handled: R_PPC_EMB_RELST_HI */
1329 /* Relocation not handled: R_PPC_EMB_RELST_HA */
1330 /* Relocation not handled: R_PPC_EMB_BIT_FLD */
1331
1332 /* PC relative relocation against either _SDA_BASE_ or _SDA2_BASE_, filling
1333 in the 16 bit signed offset from the appropriate base, and filling in the
1334 register field with the appropriate register (0, 2, or 13). */
1335 HOWTO (R_PPC_EMB_RELSDA, /* type */
1336 0, /* rightshift */
1337 1, /* size (0 = byte, 1 = short, 2 = long) */
1338 16, /* bitsize */
1339 TRUE, /* pc_relative */
1340 0, /* bitpos */
1341 complain_overflow_signed, /* complain_on_overflow */
1342 bfd_elf_generic_reloc, /* special_function */
1343 "R_PPC_EMB_RELSDA", /* name */
1344 FALSE, /* partial_inplace */
1345 0, /* src_mask */
1346 0xffff, /* dst_mask */
1347 FALSE), /* pcrel_offset */
1348
1349 /* A 16 bit relative relocation. */
1350 HOWTO (R_PPC_REL16, /* type */
1351 0, /* rightshift */
1352 1, /* size (0 = byte, 1 = short, 2 = long) */
1353 16, /* bitsize */
1354 TRUE, /* pc_relative */
1355 0, /* bitpos */
1356 complain_overflow_bitfield, /* complain_on_overflow */
1357 bfd_elf_generic_reloc, /* special_function */
1358 "R_PPC_REL16", /* name */
1359 FALSE, /* partial_inplace */
1360 0, /* src_mask */
1361 0xffff, /* dst_mask */
1362 TRUE), /* pcrel_offset */
1363
1364 /* A 16 bit relative relocation without overflow. */
1365 HOWTO (R_PPC_REL16_LO, /* type */
1366 0, /* rightshift */
1367 1, /* size (0 = byte, 1 = short, 2 = long) */
1368 16, /* bitsize */
1369 TRUE, /* pc_relative */
1370 0, /* bitpos */
1371 complain_overflow_dont,/* complain_on_overflow */
1372 bfd_elf_generic_reloc, /* special_function */
1373 "R_PPC_REL16_LO", /* name */
1374 FALSE, /* partial_inplace */
1375 0, /* src_mask */
1376 0xffff, /* dst_mask */
1377 TRUE), /* pcrel_offset */
1378
1379 /* The high order 16 bits of a relative address. */
1380 HOWTO (R_PPC_REL16_HI, /* type */
1381 16, /* rightshift */
1382 1, /* size (0 = byte, 1 = short, 2 = long) */
1383 16, /* bitsize */
1384 TRUE, /* pc_relative */
1385 0, /* bitpos */
1386 complain_overflow_dont, /* complain_on_overflow */
1387 bfd_elf_generic_reloc, /* special_function */
1388 "R_PPC_REL16_HI", /* name */
1389 FALSE, /* partial_inplace */
1390 0, /* src_mask */
1391 0xffff, /* dst_mask */
1392 TRUE), /* pcrel_offset */
1393
1394 /* The high order 16 bits of a relative address, plus 1 if the contents of
1395 the low 16 bits, treated as a signed number, is negative. */
1396 HOWTO (R_PPC_REL16_HA, /* type */
1397 16, /* rightshift */
1398 1, /* size (0 = byte, 1 = short, 2 = long) */
1399 16, /* bitsize */
1400 TRUE, /* pc_relative */
1401 0, /* bitpos */
1402 complain_overflow_dont, /* complain_on_overflow */
1403 ppc_elf_addr16_ha_reloc, /* special_function */
1404 "R_PPC_REL16_HA", /* name */
1405 FALSE, /* partial_inplace */
1406 0, /* src_mask */
1407 0xffff, /* dst_mask */
1408 TRUE), /* pcrel_offset */
1409
1410 /* GNU extension to record C++ vtable hierarchy. */
1411 HOWTO (R_PPC_GNU_VTINHERIT, /* type */
1412 0, /* rightshift */
1413 0, /* size (0 = byte, 1 = short, 2 = long) */
1414 0, /* bitsize */
1415 FALSE, /* pc_relative */
1416 0, /* bitpos */
1417 complain_overflow_dont, /* complain_on_overflow */
1418 NULL, /* special_function */
1419 "R_PPC_GNU_VTINHERIT", /* name */
1420 FALSE, /* partial_inplace */
1421 0, /* src_mask */
1422 0, /* dst_mask */
1423 FALSE), /* pcrel_offset */
1424
1425 /* GNU extension to record C++ vtable member usage. */
1426 HOWTO (R_PPC_GNU_VTENTRY, /* type */
1427 0, /* rightshift */
1428 0, /* size (0 = byte, 1 = short, 2 = long) */
1429 0, /* bitsize */
1430 FALSE, /* pc_relative */
1431 0, /* bitpos */
1432 complain_overflow_dont, /* complain_on_overflow */
1433 NULL, /* special_function */
1434 "R_PPC_GNU_VTENTRY", /* name */
1435 FALSE, /* partial_inplace */
1436 0, /* src_mask */
1437 0, /* dst_mask */
1438 FALSE), /* pcrel_offset */
1439
1440 /* Phony reloc to handle AIX style TOC entries. */
1441 HOWTO (R_PPC_TOC16, /* type */
1442 0, /* rightshift */
1443 1, /* size (0 = byte, 1 = short, 2 = long) */
1444 16, /* bitsize */
1445 FALSE, /* pc_relative */
1446 0, /* bitpos */
1447 complain_overflow_signed, /* complain_on_overflow */
1448 bfd_elf_generic_reloc, /* special_function */
1449 "R_PPC_TOC16", /* name */
1450 FALSE, /* partial_inplace */
1451 0, /* src_mask */
1452 0xffff, /* dst_mask */
1453 FALSE), /* pcrel_offset */
1454 };
1455
1456 /* Initialize the ppc_elf_howto_table, so that linear accesses can be done. */
1457
1458 static void
ppc_elf_howto_init(void)1459 ppc_elf_howto_init (void)
1460 {
1461 unsigned int i, type;
1462
1463 for (i = 0;
1464 i < sizeof (ppc_elf_howto_raw) / sizeof (ppc_elf_howto_raw[0]);
1465 i++)
1466 {
1467 type = ppc_elf_howto_raw[i].type;
1468 if (type >= (sizeof (ppc_elf_howto_table)
1469 / sizeof (ppc_elf_howto_table[0])))
1470 abort ();
1471 ppc_elf_howto_table[type] = &ppc_elf_howto_raw[i];
1472 }
1473 }
1474
1475 static reloc_howto_type *
ppc_elf_reloc_type_lookup(bfd * abfd ATTRIBUTE_UNUSED,bfd_reloc_code_real_type code)1476 ppc_elf_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
1477 bfd_reloc_code_real_type code)
1478 {
1479 enum elf_ppc_reloc_type r;
1480
1481 /* Initialize howto table if not already done. */
1482 if (!ppc_elf_howto_table[R_PPC_ADDR32])
1483 ppc_elf_howto_init ();
1484
1485 switch (code)
1486 {
1487 default:
1488 return NULL;
1489
1490 case BFD_RELOC_NONE: r = R_PPC_NONE; break;
1491 case BFD_RELOC_32: r = R_PPC_ADDR32; break;
1492 case BFD_RELOC_PPC_BA26: r = R_PPC_ADDR24; break;
1493 case BFD_RELOC_16: r = R_PPC_ADDR16; break;
1494 case BFD_RELOC_LO16: r = R_PPC_ADDR16_LO; break;
1495 case BFD_RELOC_HI16: r = R_PPC_ADDR16_HI; break;
1496 case BFD_RELOC_HI16_S: r = R_PPC_ADDR16_HA; break;
1497 case BFD_RELOC_PPC_BA16: r = R_PPC_ADDR14; break;
1498 case BFD_RELOC_PPC_BA16_BRTAKEN: r = R_PPC_ADDR14_BRTAKEN; break;
1499 case BFD_RELOC_PPC_BA16_BRNTAKEN: r = R_PPC_ADDR14_BRNTAKEN; break;
1500 case BFD_RELOC_PPC_B26: r = R_PPC_REL24; break;
1501 case BFD_RELOC_PPC_B16: r = R_PPC_REL14; break;
1502 case BFD_RELOC_PPC_B16_BRTAKEN: r = R_PPC_REL14_BRTAKEN; break;
1503 case BFD_RELOC_PPC_B16_BRNTAKEN: r = R_PPC_REL14_BRNTAKEN; break;
1504 case BFD_RELOC_16_GOTOFF: r = R_PPC_GOT16; break;
1505 case BFD_RELOC_LO16_GOTOFF: r = R_PPC_GOT16_LO; break;
1506 case BFD_RELOC_HI16_GOTOFF: r = R_PPC_GOT16_HI; break;
1507 case BFD_RELOC_HI16_S_GOTOFF: r = R_PPC_GOT16_HA; break;
1508 case BFD_RELOC_24_PLT_PCREL: r = R_PPC_PLTREL24; break;
1509 case BFD_RELOC_PPC_COPY: r = R_PPC_COPY; break;
1510 case BFD_RELOC_PPC_GLOB_DAT: r = R_PPC_GLOB_DAT; break;
1511 case BFD_RELOC_PPC_LOCAL24PC: r = R_PPC_LOCAL24PC; break;
1512 case BFD_RELOC_32_PCREL: r = R_PPC_REL32; break;
1513 case BFD_RELOC_32_PLTOFF: r = R_PPC_PLT32; break;
1514 case BFD_RELOC_32_PLT_PCREL: r = R_PPC_PLTREL32; break;
1515 case BFD_RELOC_LO16_PLTOFF: r = R_PPC_PLT16_LO; break;
1516 case BFD_RELOC_HI16_PLTOFF: r = R_PPC_PLT16_HI; break;
1517 case BFD_RELOC_HI16_S_PLTOFF: r = R_PPC_PLT16_HA; break;
1518 case BFD_RELOC_GPREL16: r = R_PPC_SDAREL16; break;
1519 case BFD_RELOC_16_BASEREL: r = R_PPC_SECTOFF; break;
1520 case BFD_RELOC_LO16_BASEREL: r = R_PPC_SECTOFF_LO; break;
1521 case BFD_RELOC_HI16_BASEREL: r = R_PPC_SECTOFF_HI; break;
1522 case BFD_RELOC_HI16_S_BASEREL: r = R_PPC_SECTOFF_HA; break;
1523 case BFD_RELOC_CTOR: r = R_PPC_ADDR32; break;
1524 case BFD_RELOC_PPC_TOC16: r = R_PPC_TOC16; break;
1525 case BFD_RELOC_PPC_TLS: r = R_PPC_TLS; break;
1526 case BFD_RELOC_PPC_DTPMOD: r = R_PPC_DTPMOD32; break;
1527 case BFD_RELOC_PPC_TPREL16: r = R_PPC_TPREL16; break;
1528 case BFD_RELOC_PPC_TPREL16_LO: r = R_PPC_TPREL16_LO; break;
1529 case BFD_RELOC_PPC_TPREL16_HI: r = R_PPC_TPREL16_HI; break;
1530 case BFD_RELOC_PPC_TPREL16_HA: r = R_PPC_TPREL16_HA; break;
1531 case BFD_RELOC_PPC_TPREL: r = R_PPC_TPREL32; break;
1532 case BFD_RELOC_PPC_DTPREL16: r = R_PPC_DTPREL16; break;
1533 case BFD_RELOC_PPC_DTPREL16_LO: r = R_PPC_DTPREL16_LO; break;
1534 case BFD_RELOC_PPC_DTPREL16_HI: r = R_PPC_DTPREL16_HI; break;
1535 case BFD_RELOC_PPC_DTPREL16_HA: r = R_PPC_DTPREL16_HA; break;
1536 case BFD_RELOC_PPC_DTPREL: r = R_PPC_DTPREL32; break;
1537 case BFD_RELOC_PPC_GOT_TLSGD16: r = R_PPC_GOT_TLSGD16; break;
1538 case BFD_RELOC_PPC_GOT_TLSGD16_LO: r = R_PPC_GOT_TLSGD16_LO; break;
1539 case BFD_RELOC_PPC_GOT_TLSGD16_HI: r = R_PPC_GOT_TLSGD16_HI; break;
1540 case BFD_RELOC_PPC_GOT_TLSGD16_HA: r = R_PPC_GOT_TLSGD16_HA; break;
1541 case BFD_RELOC_PPC_GOT_TLSLD16: r = R_PPC_GOT_TLSLD16; break;
1542 case BFD_RELOC_PPC_GOT_TLSLD16_LO: r = R_PPC_GOT_TLSLD16_LO; break;
1543 case BFD_RELOC_PPC_GOT_TLSLD16_HI: r = R_PPC_GOT_TLSLD16_HI; break;
1544 case BFD_RELOC_PPC_GOT_TLSLD16_HA: r = R_PPC_GOT_TLSLD16_HA; break;
1545 case BFD_RELOC_PPC_GOT_TPREL16: r = R_PPC_GOT_TPREL16; break;
1546 case BFD_RELOC_PPC_GOT_TPREL16_LO: r = R_PPC_GOT_TPREL16_LO; break;
1547 case BFD_RELOC_PPC_GOT_TPREL16_HI: r = R_PPC_GOT_TPREL16_HI; break;
1548 case BFD_RELOC_PPC_GOT_TPREL16_HA: r = R_PPC_GOT_TPREL16_HA; break;
1549 case BFD_RELOC_PPC_GOT_DTPREL16: r = R_PPC_GOT_DTPREL16; break;
1550 case BFD_RELOC_PPC_GOT_DTPREL16_LO: r = R_PPC_GOT_DTPREL16_LO; break;
1551 case BFD_RELOC_PPC_GOT_DTPREL16_HI: r = R_PPC_GOT_DTPREL16_HI; break;
1552 case BFD_RELOC_PPC_GOT_DTPREL16_HA: r = R_PPC_GOT_DTPREL16_HA; break;
1553 case BFD_RELOC_PPC_EMB_NADDR32: r = R_PPC_EMB_NADDR32; break;
1554 case BFD_RELOC_PPC_EMB_NADDR16: r = R_PPC_EMB_NADDR16; break;
1555 case BFD_RELOC_PPC_EMB_NADDR16_LO: r = R_PPC_EMB_NADDR16_LO; break;
1556 case BFD_RELOC_PPC_EMB_NADDR16_HI: r = R_PPC_EMB_NADDR16_HI; break;
1557 case BFD_RELOC_PPC_EMB_NADDR16_HA: r = R_PPC_EMB_NADDR16_HA; break;
1558 case BFD_RELOC_PPC_EMB_SDAI16: r = R_PPC_EMB_SDAI16; break;
1559 case BFD_RELOC_PPC_EMB_SDA2I16: r = R_PPC_EMB_SDA2I16; break;
1560 case BFD_RELOC_PPC_EMB_SDA2REL: r = R_PPC_EMB_SDA2REL; break;
1561 case BFD_RELOC_PPC_EMB_SDA21: r = R_PPC_EMB_SDA21; break;
1562 case BFD_RELOC_PPC_EMB_MRKREF: r = R_PPC_EMB_MRKREF; break;
1563 case BFD_RELOC_PPC_EMB_RELSEC16: r = R_PPC_EMB_RELSEC16; break;
1564 case BFD_RELOC_PPC_EMB_RELST_LO: r = R_PPC_EMB_RELST_LO; break;
1565 case BFD_RELOC_PPC_EMB_RELST_HI: r = R_PPC_EMB_RELST_HI; break;
1566 case BFD_RELOC_PPC_EMB_RELST_HA: r = R_PPC_EMB_RELST_HA; break;
1567 case BFD_RELOC_PPC_EMB_BIT_FLD: r = R_PPC_EMB_BIT_FLD; break;
1568 case BFD_RELOC_PPC_EMB_RELSDA: r = R_PPC_EMB_RELSDA; break;
1569 case BFD_RELOC_16_PCREL: r = R_PPC_REL16; break;
1570 case BFD_RELOC_LO16_PCREL: r = R_PPC_REL16_LO; break;
1571 case BFD_RELOC_HI16_PCREL: r = R_PPC_REL16_HI; break;
1572 case BFD_RELOC_HI16_S_PCREL: r = R_PPC_REL16_HA; break;
1573 case BFD_RELOC_VTABLE_INHERIT: r = R_PPC_GNU_VTINHERIT; break;
1574 case BFD_RELOC_VTABLE_ENTRY: r = R_PPC_GNU_VTENTRY; break;
1575 }
1576
1577 return ppc_elf_howto_table[r];
1578 };
1579
1580 /* Set the howto pointer for a PowerPC ELF reloc. */
1581
1582 static void
ppc_elf_info_to_howto(bfd * abfd ATTRIBUTE_UNUSED,arelent * cache_ptr,Elf_Internal_Rela * dst)1583 ppc_elf_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED,
1584 arelent *cache_ptr,
1585 Elf_Internal_Rela *dst)
1586 {
1587 /* Initialize howto table if not already done. */
1588 if (!ppc_elf_howto_table[R_PPC_ADDR32])
1589 ppc_elf_howto_init ();
1590
1591 BFD_ASSERT (ELF32_R_TYPE (dst->r_info) < (unsigned int) R_PPC_max);
1592 cache_ptr->howto = ppc_elf_howto_table[ELF32_R_TYPE (dst->r_info)];
1593 }
1594
1595 /* Handle the R_PPC_ADDR16_HA and R_PPC_REL16_HA relocs. */
1596
1597 static bfd_reloc_status_type
ppc_elf_addr16_ha_reloc(bfd * abfd ATTRIBUTE_UNUSED,arelent * reloc_entry,asymbol * symbol,void * data ATTRIBUTE_UNUSED,asection * input_section,bfd * output_bfd,char ** error_message ATTRIBUTE_UNUSED)1598 ppc_elf_addr16_ha_reloc (bfd *abfd ATTRIBUTE_UNUSED,
1599 arelent *reloc_entry,
1600 asymbol *symbol,
1601 void *data ATTRIBUTE_UNUSED,
1602 asection *input_section,
1603 bfd *output_bfd,
1604 char **error_message ATTRIBUTE_UNUSED)
1605 {
1606 bfd_vma relocation;
1607
1608 if (output_bfd != NULL)
1609 {
1610 reloc_entry->address += input_section->output_offset;
1611 return bfd_reloc_ok;
1612 }
1613
1614 if (reloc_entry->address > bfd_get_section_limit (abfd, input_section))
1615 return bfd_reloc_outofrange;
1616
1617 if (bfd_is_com_section (symbol->section))
1618 relocation = 0;
1619 else
1620 relocation = symbol->value;
1621
1622 relocation += symbol->section->output_section->vma;
1623 relocation += symbol->section->output_offset;
1624 relocation += reloc_entry->addend;
1625 if (reloc_entry->howto->pc_relative)
1626 relocation -= reloc_entry->address;
1627
1628 reloc_entry->addend += (relocation & 0x8000) << 1;
1629
1630 return bfd_reloc_continue;
1631 }
1632
1633 static bfd_reloc_status_type
ppc_elf_unhandled_reloc(bfd * abfd,arelent * reloc_entry,asymbol * symbol,void * data,asection * input_section,bfd * output_bfd,char ** error_message)1634 ppc_elf_unhandled_reloc (bfd *abfd,
1635 arelent *reloc_entry,
1636 asymbol *symbol,
1637 void *data,
1638 asection *input_section,
1639 bfd *output_bfd,
1640 char **error_message)
1641 {
1642 /* If this is a relocatable link (output_bfd test tells us), just
1643 call the generic function. Any adjustment will be done at final
1644 link time. */
1645 if (output_bfd != NULL)
1646 return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
1647 input_section, output_bfd, error_message);
1648
1649 if (error_message != NULL)
1650 {
1651 static char buf[60];
1652 sprintf (buf, _("generic linker can't handle %s"),
1653 reloc_entry->howto->name);
1654 *error_message = buf;
1655 }
1656 return bfd_reloc_dangerous;
1657 }
1658
1659 /* Sections created by the linker. */
1660
1661 typedef struct elf_linker_section
1662 {
1663 /* Pointer to the bfd section. */
1664 asection *section;
1665 /* Section name. */
1666 const char *name;
1667 /* Associated bss section name. */
1668 const char *bss_name;
1669 /* Associated symbol name. */
1670 const char *sym_name;
1671 /* Value of symbol. */
1672 bfd_vma sym_val;
1673 } elf_linker_section_t;
1674
1675 /* Linked list of allocated pointer entries. This hangs off of the
1676 symbol lists, and provides allows us to return different pointers,
1677 based on different addend's. */
1678
1679 typedef struct elf_linker_section_pointers
1680 {
1681 /* next allocated pointer for this symbol */
1682 struct elf_linker_section_pointers *next;
1683 /* offset of pointer from beginning of section */
1684 bfd_vma offset;
1685 /* addend used */
1686 bfd_vma addend;
1687 /* which linker section this is */
1688 elf_linker_section_t *lsect;
1689 } elf_linker_section_pointers_t;
1690
1691 struct ppc_elf_obj_tdata
1692 {
1693 struct elf_obj_tdata elf;
1694
1695 /* A mapping from local symbols to offsets into the various linker
1696 sections added. This is index by the symbol index. */
1697 elf_linker_section_pointers_t **linker_section_pointers;
1698 };
1699
1700 #define ppc_elf_tdata(bfd) \
1701 ((struct ppc_elf_obj_tdata *) (bfd)->tdata.any)
1702
1703 #define elf_local_ptr_offsets(bfd) \
1704 (ppc_elf_tdata (bfd)->linker_section_pointers)
1705
1706 /* Override the generic function because we store some extras. */
1707
1708 static bfd_boolean
ppc_elf_mkobject(bfd * abfd)1709 ppc_elf_mkobject (bfd *abfd)
1710 {
1711 bfd_size_type amt = sizeof (struct ppc_elf_obj_tdata);
1712 abfd->tdata.any = bfd_zalloc (abfd, amt);
1713 if (abfd->tdata.any == NULL)
1714 return FALSE;
1715 return TRUE;
1716 }
1717
1718 /* Fix bad default arch selected for a 32 bit input bfd when the
1719 default is 64 bit. */
1720
1721 static bfd_boolean
ppc_elf_object_p(bfd * abfd)1722 ppc_elf_object_p (bfd *abfd)
1723 {
1724 if (abfd->arch_info->the_default && abfd->arch_info->bits_per_word == 64)
1725 {
1726 Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd);
1727
1728 if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS32)
1729 {
1730 /* Relies on arch after 64 bit default being 32 bit default. */
1731 abfd->arch_info = abfd->arch_info->next;
1732 BFD_ASSERT (abfd->arch_info->bits_per_word == 32);
1733 }
1734 }
1735 return TRUE;
1736 }
1737
1738 /* Function to set whether a module needs the -mrelocatable bit set. */
1739
1740 static bfd_boolean
ppc_elf_set_private_flags(bfd * abfd,flagword flags)1741 ppc_elf_set_private_flags (bfd *abfd, flagword flags)
1742 {
1743 BFD_ASSERT (!elf_flags_init (abfd)
1744 || elf_elfheader (abfd)->e_flags == flags);
1745
1746 elf_elfheader (abfd)->e_flags = flags;
1747 elf_flags_init (abfd) = TRUE;
1748 return TRUE;
1749 }
1750
1751 /* Support for core dump NOTE sections. */
1752
1753 static bfd_boolean
ppc_elf_grok_prstatus(bfd * abfd,Elf_Internal_Note * note)1754 ppc_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
1755 {
1756 int offset;
1757 unsigned int size;
1758
1759 switch (note->descsz)
1760 {
1761 default:
1762 return FALSE;
1763
1764 case 268: /* Linux/PPC. */
1765 /* pr_cursig */
1766 elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
1767
1768 /* pr_pid */
1769 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 24);
1770
1771 /* pr_reg */
1772 offset = 72;
1773 size = 192;
1774
1775 break;
1776 }
1777
1778 /* Make a ".reg/999" section. */
1779 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
1780 size, note->descpos + offset);
1781 }
1782
1783 static bfd_boolean
ppc_elf_grok_psinfo(bfd * abfd,Elf_Internal_Note * note)1784 ppc_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
1785 {
1786 switch (note->descsz)
1787 {
1788 default:
1789 return FALSE;
1790
1791 case 128: /* Linux/PPC elf_prpsinfo. */
1792 elf_tdata (abfd)->core_program
1793 = _bfd_elfcore_strndup (abfd, note->descdata + 32, 16);
1794 elf_tdata (abfd)->core_command
1795 = _bfd_elfcore_strndup (abfd, note->descdata + 48, 80);
1796 }
1797
1798 /* Note that for some reason, a spurious space is tacked
1799 onto the end of the args in some (at least one anyway)
1800 implementations, so strip it off if it exists. */
1801
1802 {
1803 char *command = elf_tdata (abfd)->core_command;
1804 int n = strlen (command);
1805
1806 if (0 < n && command[n - 1] == ' ')
1807 command[n - 1] = '\0';
1808 }
1809
1810 return TRUE;
1811 }
1812
1813 /* Return address for Ith PLT stub in section PLT, for relocation REL
1814 or (bfd_vma) -1 if it should not be included. */
1815
1816 static bfd_vma
ppc_elf_plt_sym_val(bfd_vma i ATTRIBUTE_UNUSED,const asection * plt ATTRIBUTE_UNUSED,const arelent * rel)1817 ppc_elf_plt_sym_val (bfd_vma i ATTRIBUTE_UNUSED,
1818 const asection *plt ATTRIBUTE_UNUSED,
1819 const arelent *rel)
1820 {
1821 return rel->address;
1822 }
1823
1824 /* Handle a PowerPC specific section when reading an object file. This
1825 is called when bfd_section_from_shdr finds a section with an unknown
1826 type. */
1827
1828 static bfd_boolean
ppc_elf_section_from_shdr(bfd * abfd,Elf_Internal_Shdr * hdr,const char * name,int shindex)1829 ppc_elf_section_from_shdr (bfd *abfd,
1830 Elf_Internal_Shdr *hdr,
1831 const char *name,
1832 int shindex)
1833 {
1834 asection *newsect;
1835 flagword flags;
1836
1837 if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
1838 return FALSE;
1839
1840 newsect = hdr->bfd_section;
1841 flags = bfd_get_section_flags (abfd, newsect);
1842 if (hdr->sh_flags & SHF_EXCLUDE)
1843 flags |= SEC_EXCLUDE;
1844
1845 if (hdr->sh_type == SHT_ORDERED)
1846 flags |= SEC_SORT_ENTRIES;
1847
1848 bfd_set_section_flags (abfd, newsect, flags);
1849 return TRUE;
1850 }
1851
1852 /* Set up any other section flags and such that may be necessary. */
1853
1854 static bfd_boolean
ppc_elf_fake_sections(bfd * abfd ATTRIBUTE_UNUSED,Elf_Internal_Shdr * shdr,asection * asect)1855 ppc_elf_fake_sections (bfd *abfd ATTRIBUTE_UNUSED,
1856 Elf_Internal_Shdr *shdr,
1857 asection *asect)
1858 {
1859 if ((asect->flags & SEC_EXCLUDE) != 0)
1860 shdr->sh_flags |= SHF_EXCLUDE;
1861
1862 if ((asect->flags & SEC_SORT_ENTRIES) != 0)
1863 shdr->sh_type = SHT_ORDERED;
1864
1865 return TRUE;
1866 }
1867
1868 /* If we have .sbss2 or .PPC.EMB.sbss0 output sections, we
1869 need to bump up the number of section headers. */
1870
1871 static int
ppc_elf_additional_program_headers(bfd * abfd)1872 ppc_elf_additional_program_headers (bfd *abfd)
1873 {
1874 asection *s;
1875 int ret = 0;
1876
1877 s = bfd_get_section_by_name (abfd, ".sbss2");
1878 if (s != NULL && (s->flags & SEC_ALLOC) != 0)
1879 ++ret;
1880
1881 s = bfd_get_section_by_name (abfd, ".PPC.EMB.sbss0");
1882 if (s != NULL && (s->flags & SEC_ALLOC) != 0)
1883 ++ret;
1884
1885 return ret;
1886 }
1887
1888 /* Add extra PPC sections -- Note, for now, make .sbss2 and
1889 .PPC.EMB.sbss0 a normal section, and not a bss section so
1890 that the linker doesn't crater when trying to make more than
1891 2 sections. */
1892
1893 static const struct bfd_elf_special_section ppc_elf_special_sections[] =
1894 {
1895 { ".plt", 4, 0, SHT_NOBITS, SHF_ALLOC + SHF_EXECINSTR },
1896 { ".sbss", 5, -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
1897 { ".sbss2", 6, -2, SHT_PROGBITS, SHF_ALLOC },
1898 { ".sdata", 6, -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
1899 { ".sdata2", 7, -2, SHT_PROGBITS, SHF_ALLOC },
1900 { ".tags", 5, 0, SHT_ORDERED, SHF_ALLOC },
1901 { ".PPC.EMB.apuinfo", 16, 0, SHT_NOTE, 0 },
1902 { ".PPC.EMB.sbss0", 14, 0, SHT_PROGBITS, SHF_ALLOC },
1903 { ".PPC.EMB.sdata0", 15, 0, SHT_PROGBITS, SHF_ALLOC },
1904 { NULL, 0, 0, 0, 0 }
1905 };
1906
1907 /* This is what we want for new plt/got. */
1908 static struct bfd_elf_special_section ppc_alt_plt =
1909 { ".plt", 4, 0, SHT_PROGBITS, SHF_ALLOC };
1910
1911 static const struct bfd_elf_special_section *
ppc_elf_get_sec_type_attr(bfd * abfd ATTRIBUTE_UNUSED,asection * sec)1912 ppc_elf_get_sec_type_attr (bfd *abfd ATTRIBUTE_UNUSED, asection *sec)
1913 {
1914 const struct bfd_elf_special_section *ssect;
1915
1916 /* See if this is one of the special sections. */
1917 if (sec->name == NULL)
1918 return NULL;
1919
1920 ssect = _bfd_elf_get_special_section (sec->name, ppc_elf_special_sections,
1921 sec->use_rela_p);
1922 if (ssect != NULL)
1923 {
1924 if (ssect == ppc_elf_special_sections && (sec->flags & SEC_LOAD) != 0)
1925 ssect = &ppc_alt_plt;
1926 return ssect;
1927 }
1928
1929 return _bfd_elf_get_sec_type_attr (abfd, sec);
1930 }
1931
1932 /* Very simple linked list structure for recording apuinfo values. */
1933 typedef struct apuinfo_list
1934 {
1935 struct apuinfo_list *next;
1936 unsigned long value;
1937 }
1938 apuinfo_list;
1939
1940 static apuinfo_list *head;
1941
1942
1943 static void
apuinfo_list_init(void)1944 apuinfo_list_init (void)
1945 {
1946 head = NULL;
1947 }
1948
1949 static void
apuinfo_list_add(unsigned long value)1950 apuinfo_list_add (unsigned long value)
1951 {
1952 apuinfo_list *entry = head;
1953
1954 while (entry != NULL)
1955 {
1956 if (entry->value == value)
1957 return;
1958 entry = entry->next;
1959 }
1960
1961 entry = bfd_malloc (sizeof (* entry));
1962 if (entry == NULL)
1963 return;
1964
1965 entry->value = value;
1966 entry->next = head;
1967 head = entry;
1968 }
1969
1970 static unsigned
apuinfo_list_length(void)1971 apuinfo_list_length (void)
1972 {
1973 apuinfo_list *entry;
1974 unsigned long count;
1975
1976 for (entry = head, count = 0;
1977 entry;
1978 entry = entry->next)
1979 ++ count;
1980
1981 return count;
1982 }
1983
1984 static inline unsigned long
apuinfo_list_element(unsigned long number)1985 apuinfo_list_element (unsigned long number)
1986 {
1987 apuinfo_list * entry;
1988
1989 for (entry = head;
1990 entry && number --;
1991 entry = entry->next)
1992 ;
1993
1994 return entry ? entry->value : 0;
1995 }
1996
1997 static void
apuinfo_list_finish(void)1998 apuinfo_list_finish (void)
1999 {
2000 apuinfo_list *entry;
2001
2002 for (entry = head; entry;)
2003 {
2004 apuinfo_list *next = entry->next;
2005 free (entry);
2006 entry = next;
2007 }
2008
2009 head = NULL;
2010 }
2011
2012 #define APUINFO_SECTION_NAME ".PPC.EMB.apuinfo"
2013 #define APUINFO_LABEL "APUinfo"
2014
2015 /* Scan the input BFDs and create a linked list of
2016 the APUinfo values that will need to be emitted. */
2017
2018 static void
ppc_elf_begin_write_processing(bfd * abfd,struct bfd_link_info * link_info)2019 ppc_elf_begin_write_processing (bfd *abfd, struct bfd_link_info *link_info)
2020 {
2021 bfd *ibfd;
2022 asection *asec;
2023 char *buffer;
2024 unsigned num_input_sections;
2025 bfd_size_type output_section_size;
2026 unsigned i;
2027 unsigned num_entries;
2028 unsigned long offset;
2029 unsigned long length;
2030 const char *error_message = NULL;
2031
2032 if (link_info == NULL)
2033 return;
2034
2035 /* Scan the input bfds, looking for apuinfo sections. */
2036 num_input_sections = 0;
2037 output_section_size = 0;
2038
2039 for (ibfd = link_info->input_bfds; ibfd; ibfd = ibfd->link_next)
2040 {
2041 asec = bfd_get_section_by_name (ibfd, APUINFO_SECTION_NAME);
2042 if (asec)
2043 {
2044 ++ num_input_sections;
2045 output_section_size += asec->size;
2046 }
2047 }
2048
2049 /* We need at least one input sections
2050 in order to make merging worthwhile. */
2051 if (num_input_sections < 1)
2052 return;
2053
2054 /* Just make sure that the output section exists as well. */
2055 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
2056 if (asec == NULL)
2057 return;
2058
2059 /* Allocate a buffer for the contents of the input sections. */
2060 buffer = bfd_malloc (output_section_size);
2061 if (buffer == NULL)
2062 return;
2063
2064 offset = 0;
2065 apuinfo_list_init ();
2066
2067 /* Read in the input sections contents. */
2068 for (ibfd = link_info->input_bfds; ibfd; ibfd = ibfd->link_next)
2069 {
2070 unsigned long datum;
2071 char *ptr;
2072
2073 asec = bfd_get_section_by_name (ibfd, APUINFO_SECTION_NAME);
2074 if (asec == NULL)
2075 continue;
2076
2077 length = asec->size;
2078 if (length < 24)
2079 {
2080 error_message = _("corrupt or empty %s section in %B");
2081 goto fail;
2082 }
2083
2084 if (bfd_seek (ibfd, asec->filepos, SEEK_SET) != 0
2085 || (bfd_bread (buffer + offset, length, ibfd) != length))
2086 {
2087 error_message = _("unable to read in %s section from %B");
2088 goto fail;
2089 }
2090
2091 /* Process the contents of the section. */
2092 ptr = buffer + offset;
2093 error_message = _("corrupt %s section in %B");
2094
2095 /* Verify the contents of the header. Note - we have to
2096 extract the values this way in order to allow for a
2097 host whose endian-ness is different from the target. */
2098 datum = bfd_get_32 (ibfd, ptr);
2099 if (datum != sizeof APUINFO_LABEL)
2100 goto fail;
2101
2102 datum = bfd_get_32 (ibfd, ptr + 8);
2103 if (datum != 0x2)
2104 goto fail;
2105
2106 if (strcmp (ptr + 12, APUINFO_LABEL) != 0)
2107 goto fail;
2108
2109 /* Get the number of bytes used for apuinfo entries. */
2110 datum = bfd_get_32 (ibfd, ptr + 4);
2111 if (datum + 20 != length)
2112 goto fail;
2113
2114 /* Make sure that we do not run off the end of the section. */
2115 if (offset + length > output_section_size)
2116 goto fail;
2117
2118 /* Scan the apuinfo section, building a list of apuinfo numbers. */
2119 for (i = 0; i < datum; i += 4)
2120 apuinfo_list_add (bfd_get_32 (ibfd, ptr + 20 + i));
2121
2122 /* Update the offset. */
2123 offset += length;
2124 }
2125
2126 error_message = NULL;
2127
2128 /* Compute the size of the output section. */
2129 num_entries = apuinfo_list_length ();
2130 output_section_size = 20 + num_entries * 4;
2131
2132 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
2133
2134 if (! bfd_set_section_size (abfd, asec, output_section_size))
2135 ibfd = abfd,
2136 error_message = _("warning: unable to set size of %s section in %B");
2137
2138 fail:
2139 free (buffer);
2140
2141 if (error_message)
2142 (*_bfd_error_handler) (error_message, ibfd, APUINFO_SECTION_NAME);
2143 }
2144
2145 /* Prevent the output section from accumulating the input sections'
2146 contents. We have already stored this in our linked list structure. */
2147
2148 static bfd_boolean
ppc_elf_write_section(bfd * abfd ATTRIBUTE_UNUSED,asection * asec,bfd_byte * contents ATTRIBUTE_UNUSED)2149 ppc_elf_write_section (bfd *abfd ATTRIBUTE_UNUSED,
2150 asection *asec,
2151 bfd_byte *contents ATTRIBUTE_UNUSED)
2152 {
2153 return (apuinfo_list_length ()
2154 && strcmp (asec->name, APUINFO_SECTION_NAME) == 0);
2155 }
2156
2157 /* Finally we can generate the output section. */
2158
2159 static void
ppc_elf_final_write_processing(bfd * abfd,bfd_boolean linker ATTRIBUTE_UNUSED)2160 ppc_elf_final_write_processing (bfd *abfd, bfd_boolean linker ATTRIBUTE_UNUSED)
2161 {
2162 bfd_byte *buffer;
2163 asection *asec;
2164 unsigned i;
2165 unsigned num_entries;
2166 bfd_size_type length;
2167
2168 asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
2169 if (asec == NULL)
2170 return;
2171
2172 if (apuinfo_list_length () == 0)
2173 return;
2174
2175 length = asec->size;
2176 if (length < 20)
2177 return;
2178
2179 buffer = bfd_malloc (length);
2180 if (buffer == NULL)
2181 {
2182 (*_bfd_error_handler)
2183 (_("failed to allocate space for new APUinfo section."));
2184 return;
2185 }
2186
2187 /* Create the apuinfo header. */
2188 num_entries = apuinfo_list_length ();
2189 bfd_put_32 (abfd, sizeof APUINFO_LABEL, buffer);
2190 bfd_put_32 (abfd, num_entries * 4, buffer + 4);
2191 bfd_put_32 (abfd, 0x2, buffer + 8);
2192 strcpy ((char *) buffer + 12, APUINFO_LABEL);
2193
2194 length = 20;
2195 for (i = 0; i < num_entries; i++)
2196 {
2197 bfd_put_32 (abfd, apuinfo_list_element (i), buffer + length);
2198 length += 4;
2199 }
2200
2201 if (length != asec->size)
2202 (*_bfd_error_handler) (_("failed to compute new APUinfo section."));
2203
2204 if (! bfd_set_section_contents (abfd, asec, buffer, (file_ptr) 0, length))
2205 (*_bfd_error_handler) (_("failed to install new APUinfo section."));
2206
2207 free (buffer);
2208
2209 apuinfo_list_finish ();
2210 }
2211
2212 /* The following functions are specific to the ELF linker, while
2213 functions above are used generally. They appear in this file more
2214 or less in the order in which they are called. eg.
2215 ppc_elf_check_relocs is called early in the link process,
2216 ppc_elf_finish_dynamic_sections is one of the last functions
2217 called. */
2218
2219 /* The PPC linker needs to keep track of the number of relocs that it
2220 decides to copy as dynamic relocs in check_relocs for each symbol.
2221 This is so that it can later discard them if they are found to be
2222 unnecessary. We store the information in a field extending the
2223 regular ELF linker hash table. */
2224
2225 struct ppc_elf_dyn_relocs
2226 {
2227 struct ppc_elf_dyn_relocs *next;
2228
2229 /* The input section of the reloc. */
2230 asection *sec;
2231
2232 /* Total number of relocs copied for the input section. */
2233 bfd_size_type count;
2234
2235 /* Number of pc-relative relocs copied for the input section. */
2236 bfd_size_type pc_count;
2237 };
2238
2239 /* Track PLT entries needed for a given symbol. We might need more
2240 than one glink entry per symbol. */
2241 struct plt_entry
2242 {
2243 struct plt_entry *next;
2244
2245 /* -fPIC uses multiple GOT sections, one per file, called ".got2".
2246 This field stores the offset into .got2 used to initialise the
2247 GOT pointer reg. It will always be at least 32768 (and for
2248 current gcc this is the only offset used). */
2249 bfd_vma addend;
2250
2251 /* The .got2 section. */
2252 asection *sec;
2253
2254 /* PLT refcount or offset. */
2255 union
2256 {
2257 bfd_signed_vma refcount;
2258 bfd_vma offset;
2259 } plt;
2260
2261 /* .glink stub offset. */
2262 bfd_vma glink_offset;
2263 };
2264
2265 /* Of those relocs that might be copied as dynamic relocs, this macro
2266 selects those that must be copied when linking a shared library,
2267 even when the symbol is local. */
2268
2269 #define MUST_BE_DYN_RELOC(RTYPE) \
2270 ((RTYPE) != R_PPC_REL24 \
2271 && (RTYPE) != R_PPC_REL14 \
2272 && (RTYPE) != R_PPC_REL14_BRTAKEN \
2273 && (RTYPE) != R_PPC_REL14_BRNTAKEN \
2274 && (RTYPE) != R_PPC_REL32)
2275
2276 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
2277 copying dynamic variables from a shared lib into an app's dynbss
2278 section, and instead use a dynamic relocation to point into the
2279 shared lib. */
2280 #define ELIMINATE_COPY_RELOCS 1
2281
2282 /* PPC ELF linker hash entry. */
2283
2284 struct ppc_elf_link_hash_entry
2285 {
2286 struct elf_link_hash_entry elf;
2287
2288 /* If this symbol is used in the linker created sections, the processor
2289 specific backend uses this field to map the field into the offset
2290 from the beginning of the section. */
2291 elf_linker_section_pointers_t *linker_section_pointer;
2292
2293 /* Track dynamic relocs copied for this symbol. */
2294 struct ppc_elf_dyn_relocs *dyn_relocs;
2295
2296 /* Contexts in which symbol is used in the GOT (or TOC).
2297 TLS_GD .. TLS_TLS bits are or'd into the mask as the
2298 corresponding relocs are encountered during check_relocs.
2299 tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to
2300 indicate the corresponding GOT entry type is not needed. */
2301 #define TLS_GD 1 /* GD reloc. */
2302 #define TLS_LD 2 /* LD reloc. */
2303 #define TLS_TPREL 4 /* TPREL reloc, => IE. */
2304 #define TLS_DTPREL 8 /* DTPREL reloc, => LD. */
2305 #define TLS_TLS 16 /* Any TLS reloc. */
2306 #define TLS_TPRELGD 32 /* TPREL reloc resulting from GD->IE. */
2307 char tls_mask;
2308
2309 /* Nonzero if we have seen a small data relocation referring to this
2310 symbol. */
2311 unsigned char has_sda_refs;
2312 };
2313
2314 #define ppc_elf_hash_entry(ent) ((struct ppc_elf_link_hash_entry *) (ent))
2315
2316 /* PPC ELF linker hash table. */
2317
2318 struct ppc_elf_link_hash_table
2319 {
2320 struct elf_link_hash_table elf;
2321
2322 /* Short-cuts to get to dynamic linker sections. */
2323 asection *got;
2324 asection *relgot;
2325 asection *glink;
2326 asection *plt;
2327 asection *relplt;
2328 asection *dynbss;
2329 asection *relbss;
2330 asection *dynsbss;
2331 asection *relsbss;
2332 elf_linker_section_t sdata[2];
2333 asection *sbss;
2334
2335 /* Shortcut to .__tls_get_addr. */
2336 struct elf_link_hash_entry *tls_get_addr;
2337
2338 /* TLS local dynamic got entry handling. */
2339 union {
2340 bfd_signed_vma refcount;
2341 bfd_vma offset;
2342 } tlsld_got;
2343
2344 /* Offset of PltResolve function in glink. */
2345 bfd_vma glink_pltresolve;
2346
2347 /* Size of reserved GOT entries. */
2348 unsigned int got_header_size;
2349 /* Non-zero if allocating the header left a gap. */
2350 unsigned int got_gap;
2351
2352 /* Whether to use new plt/got layout or not. */
2353 unsigned int new_plt:1;
2354 unsigned int old_plt:1;
2355
2356 /* Small local sym to section mapping cache. */
2357 struct sym_sec_cache sym_sec;
2358
2359 /* The (unloaded but important) .rela.plt.unloaded on VxWorks. */
2360 asection *srelplt2;
2361
2362 /* The .got.plt section (VxWorks only)*/
2363 asection *sgotplt;
2364
2365 /* Short-cuts to frequently used symbols on VxWorks targets. */
2366 struct elf_link_hash_entry *hgot, *hplt;
2367
2368 /* True if the target system is VxWorks. */
2369 int is_vxworks;
2370
2371 /* The size of PLT entries. */
2372 int plt_entry_size;
2373 /* The distance between adjacent PLT slots. */
2374 int plt_slot_size;
2375 /* The size of the first PLT entry. */
2376 int plt_initial_entry_size;
2377 };
2378
2379 /* Get the PPC ELF linker hash table from a link_info structure. */
2380
2381 #define ppc_elf_hash_table(p) \
2382 ((struct ppc_elf_link_hash_table *) (p)->hash)
2383
2384 /* Create an entry in a PPC ELF linker hash table. */
2385
2386 static struct bfd_hash_entry *
ppc_elf_link_hash_newfunc(struct bfd_hash_entry * entry,struct bfd_hash_table * table,const char * string)2387 ppc_elf_link_hash_newfunc (struct bfd_hash_entry *entry,
2388 struct bfd_hash_table *table,
2389 const char *string)
2390 {
2391 /* Allocate the structure if it has not already been allocated by a
2392 subclass. */
2393 if (entry == NULL)
2394 {
2395 entry = bfd_hash_allocate (table,
2396 sizeof (struct ppc_elf_link_hash_entry));
2397 if (entry == NULL)
2398 return entry;
2399 }
2400
2401 /* Call the allocation method of the superclass. */
2402 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
2403 if (entry != NULL)
2404 {
2405 ppc_elf_hash_entry (entry)->linker_section_pointer = NULL;
2406 ppc_elf_hash_entry (entry)->dyn_relocs = NULL;
2407 ppc_elf_hash_entry (entry)->tls_mask = 0;
2408 }
2409
2410 return entry;
2411 }
2412
2413 /* Create a PPC ELF linker hash table. */
2414
2415 static struct bfd_link_hash_table *
ppc_elf_link_hash_table_create(bfd * abfd)2416 ppc_elf_link_hash_table_create (bfd *abfd)
2417 {
2418 struct ppc_elf_link_hash_table *ret;
2419
2420 ret = bfd_zmalloc (sizeof (struct ppc_elf_link_hash_table));
2421 if (ret == NULL)
2422 return NULL;
2423
2424 if (! _bfd_elf_link_hash_table_init (&ret->elf, abfd,
2425 ppc_elf_link_hash_newfunc))
2426 {
2427 free (ret);
2428 return NULL;
2429 }
2430
2431 ret->elf.init_plt_refcount.refcount = 0;
2432 ret->elf.init_plt_refcount.glist = NULL;
2433 ret->elf.init_plt_offset.offset = 0;
2434 ret->elf.init_plt_offset.glist = NULL;
2435
2436 ret->sdata[0].name = ".sdata";
2437 ret->sdata[0].sym_name = "_SDA_BASE_";
2438 ret->sdata[0].bss_name = ".sbss";
2439
2440 ret->sdata[1].name = ".sdata2";
2441 ret->sdata[1].sym_name = "_SDA2_BASE_";
2442 ret->sdata[1].bss_name = ".sbss2";
2443
2444 ret->plt_entry_size = 12;
2445 ret->plt_slot_size = 8;
2446 ret->plt_initial_entry_size = 72;
2447
2448 ret->is_vxworks = 0;
2449
2450 return &ret->elf.root;
2451 }
2452
2453 /* Create .got and the related sections. */
2454
2455 static bfd_boolean
ppc_elf_create_got(bfd * abfd,struct bfd_link_info * info)2456 ppc_elf_create_got (bfd *abfd, struct bfd_link_info *info)
2457 {
2458 struct ppc_elf_link_hash_table *htab;
2459 asection *s;
2460 flagword flags;
2461
2462 if (!_bfd_elf_create_got_section (abfd, info))
2463 return FALSE;
2464
2465 htab = ppc_elf_hash_table (info);
2466 htab->got = s = bfd_get_section_by_name (abfd, ".got");
2467 if (s == NULL)
2468 abort ();
2469
2470 if (htab->is_vxworks)
2471 {
2472 htab->sgotplt = bfd_get_section_by_name (abfd, ".got.plt");
2473 if (!htab->sgotplt)
2474 abort ();
2475 }
2476 else
2477 {
2478 /* The powerpc .got has a blrl instruction in it. Mark it
2479 executable. */
2480 flags = (SEC_ALLOC | SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS
2481 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
2482 if (!bfd_set_section_flags (abfd, s, flags))
2483 return FALSE;
2484 }
2485
2486 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
2487 | SEC_LINKER_CREATED | SEC_READONLY);
2488 htab->relgot = bfd_make_section_with_flags (abfd, ".rela.got", flags);
2489 if (!htab->relgot
2490 || ! bfd_set_section_alignment (abfd, htab->relgot, 2))
2491 return FALSE;
2492
2493 return TRUE;
2494 }
2495
2496 /* We have to create .dynsbss and .rela.sbss here so that they get mapped
2497 to output sections (just like _bfd_elf_create_dynamic_sections has
2498 to create .dynbss and .rela.bss). */
2499
2500 static bfd_boolean
ppc_elf_create_dynamic_sections(bfd * abfd,struct bfd_link_info * info)2501 ppc_elf_create_dynamic_sections (bfd *abfd, struct bfd_link_info *info)
2502 {
2503 struct ppc_elf_link_hash_table *htab;
2504 asection *s;
2505 flagword flags;
2506
2507 htab = ppc_elf_hash_table (info);
2508
2509 if (htab->got == NULL
2510 && !ppc_elf_create_got (abfd, info))
2511 return FALSE;
2512
2513 if (!_bfd_elf_create_dynamic_sections (abfd, info))
2514 return FALSE;
2515
2516 flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_HAS_CONTENTS
2517 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
2518
2519 s = bfd_make_section_anyway_with_flags (abfd, ".glink", flags | SEC_CODE);
2520 htab->glink = s;
2521 if (s == NULL
2522 || !bfd_set_section_alignment (abfd, s, 4))
2523 return FALSE;
2524
2525 htab->dynbss = bfd_get_section_by_name (abfd, ".dynbss");
2526 s = bfd_make_section_with_flags (abfd, ".dynsbss",
2527 SEC_ALLOC | SEC_LINKER_CREATED);
2528 htab->dynsbss = s;
2529 if (s == NULL)
2530 return FALSE;
2531
2532 if (! info->shared)
2533 {
2534 htab->relbss = bfd_get_section_by_name (abfd, ".rela.bss");
2535 s = bfd_make_section_with_flags (abfd, ".rela.sbss", flags);
2536 htab->relsbss = s;
2537 if (s == NULL
2538 || ! bfd_set_section_alignment (abfd, s, 2))
2539 return FALSE;
2540 }
2541
2542 /* Create the section for VxWorks static plt relocations. */
2543 if (htab->is_vxworks && !info->shared)
2544 {
2545 s = bfd_make_section (abfd, ".rela.plt.unloaded");
2546 flags = (SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_READONLY
2547 | SEC_LINKER_CREATED);
2548 if (s == NULL
2549 || ! bfd_set_section_flags (abfd, s, flags)
2550 || ! bfd_set_section_alignment (abfd, s,
2551 get_elf_backend_data (abfd)->s->log_file_align))
2552 return FALSE;
2553 htab->srelplt2 = s;
2554 }
2555
2556 htab->relplt = bfd_get_section_by_name (abfd, ".rela.plt");
2557 htab->plt = s = bfd_get_section_by_name (abfd, ".plt");
2558 if (s == NULL)
2559 abort ();
2560
2561 flags = SEC_ALLOC | SEC_CODE | SEC_LINKER_CREATED;
2562 return bfd_set_section_flags (abfd, s, flags);
2563 }
2564
2565 /* Copy the extra info we tack onto an elf_link_hash_entry. */
2566
2567 static void
ppc_elf_copy_indirect_symbol(const struct elf_backend_data * bed ATTRIBUTE_UNUSED,struct elf_link_hash_entry * dir,struct elf_link_hash_entry * ind)2568 ppc_elf_copy_indirect_symbol (const struct elf_backend_data *bed ATTRIBUTE_UNUSED,
2569 struct elf_link_hash_entry *dir,
2570 struct elf_link_hash_entry *ind)
2571 {
2572 struct ppc_elf_link_hash_entry *edir, *eind;
2573 bfd_signed_vma tmp;
2574
2575 edir = (struct ppc_elf_link_hash_entry *) dir;
2576 eind = (struct ppc_elf_link_hash_entry *) ind;
2577
2578 if (eind->dyn_relocs != NULL)
2579 {
2580 if (edir->dyn_relocs != NULL)
2581 {
2582 struct ppc_elf_dyn_relocs **pp;
2583 struct ppc_elf_dyn_relocs *p;
2584
2585 if (ind->root.type == bfd_link_hash_indirect)
2586 abort ();
2587
2588 /* Add reloc counts against the weak sym to the strong sym
2589 list. Merge any entries against the same section. */
2590 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
2591 {
2592 struct ppc_elf_dyn_relocs *q;
2593
2594 for (q = edir->dyn_relocs; q != NULL; q = q->next)
2595 if (q->sec == p->sec)
2596 {
2597 q->pc_count += p->pc_count;
2598 q->count += p->count;
2599 *pp = p->next;
2600 break;
2601 }
2602 if (q == NULL)
2603 pp = &p->next;
2604 }
2605 *pp = edir->dyn_relocs;
2606 }
2607
2608 edir->dyn_relocs = eind->dyn_relocs;
2609 eind->dyn_relocs = NULL;
2610 }
2611
2612 edir->tls_mask |= eind->tls_mask;
2613 edir->has_sda_refs |= eind->has_sda_refs;
2614
2615 /* If called to transfer flags for a weakdef during processing
2616 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
2617 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
2618 if (!(ELIMINATE_COPY_RELOCS
2619 && eind->elf.root.type != bfd_link_hash_indirect
2620 && edir->elf.dynamic_adjusted))
2621 edir->elf.non_got_ref |= eind->elf.non_got_ref;
2622
2623 edir->elf.ref_dynamic |= eind->elf.ref_dynamic;
2624 edir->elf.ref_regular |= eind->elf.ref_regular;
2625 edir->elf.ref_regular_nonweak |= eind->elf.ref_regular_nonweak;
2626 edir->elf.needs_plt |= eind->elf.needs_plt;
2627
2628 /* If we were called to copy over info for a weak sym, that's all. */
2629 if (eind->elf.root.type != bfd_link_hash_indirect)
2630 return;
2631
2632 /* Copy over the GOT refcount entries that we may have already seen to
2633 the symbol which just became indirect. */
2634 tmp = edir->elf.got.refcount;
2635 if (tmp < 1)
2636 {
2637 edir->elf.got.refcount = eind->elf.got.refcount;
2638 eind->elf.got.refcount = tmp;
2639 }
2640 else
2641 BFD_ASSERT (eind->elf.got.refcount < 1);
2642
2643 /* And plt entries. */
2644 if (eind->elf.plt.plist != NULL)
2645 {
2646 if (edir->elf.plt.plist != NULL)
2647 {
2648 struct plt_entry **entp;
2649 struct plt_entry *ent;
2650
2651 for (entp = &eind->elf.plt.plist; (ent = *entp) != NULL; )
2652 {
2653 struct plt_entry *dent;
2654
2655 for (dent = edir->elf.plt.plist; dent != NULL; dent = dent->next)
2656 if (dent->sec == ent->sec && dent->addend == ent->addend)
2657 {
2658 dent->plt.refcount += ent->plt.refcount;
2659 *entp = ent->next;
2660 break;
2661 }
2662 if (dent == NULL)
2663 entp = &ent->next;
2664 }
2665 *entp = edir->elf.plt.plist;
2666 }
2667
2668 edir->elf.plt.plist = eind->elf.plt.plist;
2669 eind->elf.plt.plist = NULL;
2670 }
2671
2672 if (edir->elf.dynindx == -1)
2673 {
2674 edir->elf.dynindx = eind->elf.dynindx;
2675 edir->elf.dynstr_index = eind->elf.dynstr_index;
2676 eind->elf.dynindx = -1;
2677 eind->elf.dynstr_index = 0;
2678 }
2679 else
2680 BFD_ASSERT (eind->elf.dynindx == -1);
2681 }
2682
2683 /* Return 1 if target is one of ours. */
2684
2685 static bfd_boolean
is_ppc_elf_target(const struct bfd_target * targ)2686 is_ppc_elf_target (const struct bfd_target *targ)
2687 {
2688 extern const bfd_target bfd_elf32_powerpc_vec;
2689 extern const bfd_target bfd_elf32_powerpcle_vec;
2690
2691 return targ == &bfd_elf32_powerpc_vec || targ == &bfd_elf32_powerpcle_vec;
2692 }
2693
2694 /* Hook called by the linker routine which adds symbols from an object
2695 file. We use it to put .comm items in .sbss, and not .bss. */
2696
2697 static bfd_boolean
ppc_elf_add_symbol_hook(bfd * abfd,struct bfd_link_info * info,Elf_Internal_Sym * sym,const char ** namep ATTRIBUTE_UNUSED,flagword * flagsp ATTRIBUTE_UNUSED,asection ** secp,bfd_vma * valp)2698 ppc_elf_add_symbol_hook (bfd *abfd,
2699 struct bfd_link_info *info,
2700 Elf_Internal_Sym *sym,
2701 const char **namep ATTRIBUTE_UNUSED,
2702 flagword *flagsp ATTRIBUTE_UNUSED,
2703 asection **secp,
2704 bfd_vma *valp)
2705 {
2706 if (sym->st_shndx == SHN_COMMON
2707 && !info->relocatable
2708 && sym->st_size <= elf_gp_size (abfd)
2709 && is_ppc_elf_target (info->hash->creator))
2710 {
2711 /* Common symbols less than or equal to -G nn bytes are automatically
2712 put into .sbss. */
2713 struct ppc_elf_link_hash_table *htab;
2714
2715 htab = ppc_elf_hash_table (info);
2716 if (htab->sbss == NULL)
2717 {
2718 flagword flags = SEC_IS_COMMON | SEC_LINKER_CREATED;
2719
2720 if (!htab->elf.dynobj)
2721 htab->elf.dynobj = abfd;
2722
2723 htab->sbss = bfd_make_section_anyway_with_flags (htab->elf.dynobj,
2724 ".sbss",
2725 flags);
2726 if (htab->sbss == NULL)
2727 return FALSE;
2728 }
2729
2730 *secp = htab->sbss;
2731 *valp = sym->st_size;
2732 }
2733
2734 return TRUE;
2735 }
2736
2737 /* Create a special linker section. */
2738
2739 static bfd_boolean
ppc_elf_create_linker_section(bfd * abfd,struct bfd_link_info * info,flagword flags,elf_linker_section_t * lsect)2740 ppc_elf_create_linker_section (bfd *abfd,
2741 struct bfd_link_info *info,
2742 flagword flags,
2743 elf_linker_section_t *lsect)
2744 {
2745 struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
2746 asection *s;
2747
2748 flags |= (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
2749 | SEC_LINKER_CREATED);
2750
2751 /* Record the first bfd that needs the special sections. */
2752 if (!htab->elf.dynobj)
2753 htab->elf.dynobj = abfd;
2754
2755 s = bfd_make_section_anyway_with_flags (htab->elf.dynobj,
2756 lsect->name,
2757 flags);
2758 if (s == NULL
2759 || !bfd_set_section_alignment (htab->elf.dynobj, s, 2))
2760 return FALSE;
2761 lsect->section = s;
2762
2763 return TRUE;
2764 }
2765
2766 /* Find a linker generated pointer with a given addend and type. */
2767
2768 static elf_linker_section_pointers_t *
elf_find_pointer_linker_section(elf_linker_section_pointers_t * linker_pointers,bfd_vma addend,elf_linker_section_t * lsect)2769 elf_find_pointer_linker_section
2770 (elf_linker_section_pointers_t *linker_pointers,
2771 bfd_vma addend,
2772 elf_linker_section_t *lsect)
2773 {
2774 for ( ; linker_pointers != NULL; linker_pointers = linker_pointers->next)
2775 if (lsect == linker_pointers->lsect && addend == linker_pointers->addend)
2776 return linker_pointers;
2777
2778 return NULL;
2779 }
2780
2781 /* Allocate a pointer to live in a linker created section. */
2782
2783 static bfd_boolean
elf_create_pointer_linker_section(bfd * abfd,elf_linker_section_t * lsect,struct elf_link_hash_entry * h,const Elf_Internal_Rela * rel)2784 elf_create_pointer_linker_section (bfd *abfd,
2785 elf_linker_section_t *lsect,
2786 struct elf_link_hash_entry *h,
2787 const Elf_Internal_Rela *rel)
2788 {
2789 elf_linker_section_pointers_t **ptr_linker_section_ptr = NULL;
2790 elf_linker_section_pointers_t *linker_section_ptr;
2791 unsigned long r_symndx = ELF32_R_SYM (rel->r_info);
2792 bfd_size_type amt;
2793
2794 BFD_ASSERT (lsect != NULL);
2795
2796 /* Is this a global symbol? */
2797 if (h != NULL)
2798 {
2799 struct ppc_elf_link_hash_entry *eh;
2800
2801 /* Has this symbol already been allocated? If so, our work is done. */
2802 eh = (struct ppc_elf_link_hash_entry *) h;
2803 if (elf_find_pointer_linker_section (eh->linker_section_pointer,
2804 rel->r_addend,
2805 lsect))
2806 return TRUE;
2807
2808 ptr_linker_section_ptr = &eh->linker_section_pointer;
2809 }
2810 else
2811 {
2812 /* Allocation of a pointer to a local symbol. */
2813 elf_linker_section_pointers_t **ptr = elf_local_ptr_offsets (abfd);
2814
2815 /* Allocate a table to hold the local symbols if first time. */
2816 if (!ptr)
2817 {
2818 unsigned int num_symbols = elf_tdata (abfd)->symtab_hdr.sh_info;
2819
2820 amt = num_symbols;
2821 amt *= sizeof (elf_linker_section_pointers_t *);
2822 ptr = bfd_zalloc (abfd, amt);
2823
2824 if (!ptr)
2825 return FALSE;
2826
2827 elf_local_ptr_offsets (abfd) = ptr;
2828 }
2829
2830 /* Has this symbol already been allocated? If so, our work is done. */
2831 if (elf_find_pointer_linker_section (ptr[r_symndx],
2832 rel->r_addend,
2833 lsect))
2834 return TRUE;
2835
2836 ptr_linker_section_ptr = &ptr[r_symndx];
2837 }
2838
2839 /* Allocate space for a pointer in the linker section, and allocate
2840 a new pointer record from internal memory. */
2841 BFD_ASSERT (ptr_linker_section_ptr != NULL);
2842 amt = sizeof (elf_linker_section_pointers_t);
2843 linker_section_ptr = bfd_alloc (abfd, amt);
2844
2845 if (!linker_section_ptr)
2846 return FALSE;
2847
2848 linker_section_ptr->next = *ptr_linker_section_ptr;
2849 linker_section_ptr->addend = rel->r_addend;
2850 linker_section_ptr->lsect = lsect;
2851 *ptr_linker_section_ptr = linker_section_ptr;
2852
2853 linker_section_ptr->offset = lsect->section->size;
2854 lsect->section->size += 4;
2855
2856 #ifdef DEBUG
2857 fprintf (stderr,
2858 "Create pointer in linker section %s, offset = %ld, section size = %ld\n",
2859 lsect->name, (long) linker_section_ptr->offset,
2860 (long) lsect->section->size);
2861 #endif
2862
2863 return TRUE;
2864 }
2865
2866 static bfd_boolean
update_local_sym_info(bfd * abfd,Elf_Internal_Shdr * symtab_hdr,unsigned long r_symndx,int tls_type)2867 update_local_sym_info (bfd *abfd,
2868 Elf_Internal_Shdr *symtab_hdr,
2869 unsigned long r_symndx,
2870 int tls_type)
2871 {
2872 bfd_signed_vma *local_got_refcounts = elf_local_got_refcounts (abfd);
2873 char *local_got_tls_masks;
2874
2875 if (local_got_refcounts == NULL)
2876 {
2877 bfd_size_type size = symtab_hdr->sh_info;
2878
2879 size *= sizeof (*local_got_refcounts) + sizeof (*local_got_tls_masks);
2880 local_got_refcounts = bfd_zalloc (abfd, size);
2881 if (local_got_refcounts == NULL)
2882 return FALSE;
2883 elf_local_got_refcounts (abfd) = local_got_refcounts;
2884 }
2885
2886 local_got_refcounts[r_symndx] += 1;
2887 local_got_tls_masks = (char *) (local_got_refcounts + symtab_hdr->sh_info);
2888 local_got_tls_masks[r_symndx] |= tls_type;
2889 return TRUE;
2890 }
2891
2892 static bfd_boolean
update_plt_info(bfd * abfd,struct elf_link_hash_entry * h,asection * sec,bfd_vma addend)2893 update_plt_info (bfd *abfd, struct elf_link_hash_entry *h,
2894 asection *sec, bfd_vma addend)
2895 {
2896 struct plt_entry *ent;
2897
2898 if (addend < 32768)
2899 sec = NULL;
2900 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
2901 if (ent->sec == sec && ent->addend == addend)
2902 break;
2903 if (ent == NULL)
2904 {
2905 bfd_size_type amt = sizeof (*ent);
2906 ent = bfd_alloc (abfd, amt);
2907 if (ent == NULL)
2908 return FALSE;
2909 ent->next = h->plt.plist;
2910 ent->sec = sec;
2911 ent->addend = addend;
2912 ent->plt.refcount = 0;
2913 h->plt.plist = ent;
2914 }
2915 ent->plt.refcount += 1;
2916 return TRUE;
2917 }
2918
2919 static struct plt_entry *
find_plt_ent(struct elf_link_hash_entry * h,asection * sec,bfd_vma addend)2920 find_plt_ent (struct elf_link_hash_entry *h, asection *sec, bfd_vma addend)
2921 {
2922 struct plt_entry *ent;
2923
2924 if (addend < 32768)
2925 sec = NULL;
2926 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
2927 if (ent->sec == sec && ent->addend == addend)
2928 break;
2929 return ent;
2930 }
2931
2932 static void
bad_shared_reloc(bfd * abfd,enum elf_ppc_reloc_type r_type)2933 bad_shared_reloc (bfd *abfd, enum elf_ppc_reloc_type r_type)
2934 {
2935 (*_bfd_error_handler)
2936 (_("%B: relocation %s cannot be used when making a shared object"),
2937 abfd,
2938 ppc_elf_howto_table[r_type]->name);
2939 bfd_set_error (bfd_error_bad_value);
2940 }
2941
2942 /* Look through the relocs for a section during the first phase, and
2943 allocate space in the global offset table or procedure linkage
2944 table. */
2945
2946 static bfd_boolean
ppc_elf_check_relocs(bfd * abfd,struct bfd_link_info * info,asection * sec,const Elf_Internal_Rela * relocs)2947 ppc_elf_check_relocs (bfd *abfd,
2948 struct bfd_link_info *info,
2949 asection *sec,
2950 const Elf_Internal_Rela *relocs)
2951 {
2952 struct ppc_elf_link_hash_table *htab;
2953 Elf_Internal_Shdr *symtab_hdr;
2954 struct elf_link_hash_entry **sym_hashes;
2955 const Elf_Internal_Rela *rel;
2956 const Elf_Internal_Rela *rel_end;
2957 asection *got2, *sreloc;
2958
2959 if (info->relocatable)
2960 return TRUE;
2961
2962 /* Don't do anything special with non-loaded, non-alloced sections.
2963 In particular, any relocs in such sections should not affect GOT
2964 and PLT reference counting (ie. we don't allow them to create GOT
2965 or PLT entries), there's no possibility or desire to optimize TLS
2966 relocs, and there's not much point in propagating relocs to shared
2967 libs that the dynamic linker won't relocate. */
2968 if ((sec->flags & SEC_ALLOC) == 0)
2969 return TRUE;
2970
2971 #ifdef DEBUG
2972 _bfd_error_handler ("ppc_elf_check_relocs called for section %A in %B",
2973 sec, abfd);
2974 #endif
2975
2976 /* Initialize howto table if not already done. */
2977 if (!ppc_elf_howto_table[R_PPC_ADDR32])
2978 ppc_elf_howto_init ();
2979
2980 htab = ppc_elf_hash_table (info);
2981 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
2982 sym_hashes = elf_sym_hashes (abfd);
2983 got2 = bfd_get_section_by_name (abfd, ".got2");
2984 sreloc = NULL;
2985
2986 rel_end = relocs + sec->reloc_count;
2987 for (rel = relocs; rel < rel_end; rel++)
2988 {
2989 unsigned long r_symndx;
2990 enum elf_ppc_reloc_type r_type;
2991 struct elf_link_hash_entry *h;
2992 int tls_type = 0;
2993
2994 r_symndx = ELF32_R_SYM (rel->r_info);
2995 if (r_symndx < symtab_hdr->sh_info)
2996 h = NULL;
2997 else
2998 {
2999 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3000 while (h->root.type == bfd_link_hash_indirect
3001 || h->root.type == bfd_link_hash_warning)
3002 h = (struct elf_link_hash_entry *) h->root.u.i.link;
3003 }
3004
3005 /* If a relocation refers to _GLOBAL_OFFSET_TABLE_, create the .got.
3006 This shows up in particular in an R_PPC_ADDR32 in the eabi
3007 startup code. */
3008 if (h != NULL
3009 && htab->got == NULL
3010 && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
3011 {
3012 if (htab->elf.dynobj == NULL)
3013 htab->elf.dynobj = abfd;
3014 if (!ppc_elf_create_got (htab->elf.dynobj, info))
3015 return FALSE;
3016 BFD_ASSERT (h == htab->elf.hgot);
3017 }
3018
3019 r_type = ELF32_R_TYPE (rel->r_info);
3020 switch (r_type)
3021 {
3022 case R_PPC_GOT_TLSLD16:
3023 case R_PPC_GOT_TLSLD16_LO:
3024 case R_PPC_GOT_TLSLD16_HI:
3025 case R_PPC_GOT_TLSLD16_HA:
3026 htab->tlsld_got.refcount += 1;
3027 tls_type = TLS_TLS | TLS_LD;
3028 goto dogottls;
3029
3030 case R_PPC_GOT_TLSGD16:
3031 case R_PPC_GOT_TLSGD16_LO:
3032 case R_PPC_GOT_TLSGD16_HI:
3033 case R_PPC_GOT_TLSGD16_HA:
3034 tls_type = TLS_TLS | TLS_GD;
3035 goto dogottls;
3036
3037 case R_PPC_GOT_TPREL16:
3038 case R_PPC_GOT_TPREL16_LO:
3039 case R_PPC_GOT_TPREL16_HI:
3040 case R_PPC_GOT_TPREL16_HA:
3041 if (info->shared)
3042 info->flags |= DF_STATIC_TLS;
3043 tls_type = TLS_TLS | TLS_TPREL;
3044 goto dogottls;
3045
3046 case R_PPC_GOT_DTPREL16:
3047 case R_PPC_GOT_DTPREL16_LO:
3048 case R_PPC_GOT_DTPREL16_HI:
3049 case R_PPC_GOT_DTPREL16_HA:
3050 tls_type = TLS_TLS | TLS_DTPREL;
3051 dogottls:
3052 sec->has_tls_reloc = 1;
3053 /* Fall thru */
3054
3055 /* GOT16 relocations */
3056 case R_PPC_GOT16:
3057 case R_PPC_GOT16_LO:
3058 case R_PPC_GOT16_HI:
3059 case R_PPC_GOT16_HA:
3060 /* This symbol requires a global offset table entry. */
3061 if (htab->got == NULL)
3062 {
3063 if (htab->elf.dynobj == NULL)
3064 htab->elf.dynobj = abfd;
3065 if (!ppc_elf_create_got (htab->elf.dynobj, info))
3066 return FALSE;
3067 }
3068 if (h != NULL)
3069 {
3070 h->got.refcount += 1;
3071 ppc_elf_hash_entry (h)->tls_mask |= tls_type;
3072 }
3073 else
3074 /* This is a global offset table entry for a local symbol. */
3075 if (!update_local_sym_info (abfd, symtab_hdr, r_symndx, tls_type))
3076 return FALSE;
3077 break;
3078
3079 /* Indirect .sdata relocation. */
3080 case R_PPC_EMB_SDAI16:
3081 if (info->shared)
3082 {
3083 bad_shared_reloc (abfd, r_type);
3084 return FALSE;
3085 }
3086 if (htab->sdata[0].section == NULL
3087 && !ppc_elf_create_linker_section (abfd, info, 0,
3088 &htab->sdata[0]))
3089 return FALSE;
3090 if (!elf_create_pointer_linker_section (abfd, &htab->sdata[0],
3091 h, rel))
3092 return FALSE;
3093 break;
3094
3095 /* Indirect .sdata2 relocation. */
3096 case R_PPC_EMB_SDA2I16:
3097 if (info->shared)
3098 {
3099 bad_shared_reloc (abfd, r_type);
3100 return FALSE;
3101 }
3102 if (htab->sdata[1].section == NULL
3103 && !ppc_elf_create_linker_section (abfd, info, SEC_READONLY,
3104 &htab->sdata[1]))
3105 return FALSE;
3106 if (!elf_create_pointer_linker_section (abfd, &htab->sdata[1],
3107 h, rel))
3108 return FALSE;
3109 break;
3110
3111 case R_PPC_SDAREL16:
3112 case R_PPC_EMB_SDA2REL:
3113 case R_PPC_EMB_SDA21:
3114 case R_PPC_EMB_RELSDA:
3115 case R_PPC_EMB_NADDR32:
3116 case R_PPC_EMB_NADDR16:
3117 case R_PPC_EMB_NADDR16_LO:
3118 case R_PPC_EMB_NADDR16_HI:
3119 case R_PPC_EMB_NADDR16_HA:
3120 if (info->shared)
3121 {
3122 bad_shared_reloc (abfd, r_type);
3123 return FALSE;
3124 }
3125 if (h != NULL)
3126 {
3127 ppc_elf_hash_entry (h)->has_sda_refs = TRUE;
3128 /* We may need a copy reloc. */
3129 h->non_got_ref = TRUE;
3130 }
3131 break;
3132
3133 case R_PPC_PLT32:
3134 case R_PPC_PLTREL24:
3135 case R_PPC_PLTREL32:
3136 case R_PPC_PLT16_LO:
3137 case R_PPC_PLT16_HI:
3138 case R_PPC_PLT16_HA:
3139 #ifdef DEBUG
3140 fprintf (stderr, "Reloc requires a PLT entry\n");
3141 #endif
3142 /* This symbol requires a procedure linkage table entry. We
3143 actually build the entry in finish_dynamic_symbol,
3144 because this might be a case of linking PIC code without
3145 linking in any dynamic objects, in which case we don't
3146 need to generate a procedure linkage table after all. */
3147
3148 if (h == NULL)
3149 {
3150 /* It does not make sense to have a procedure linkage
3151 table entry for a local symbol. */
3152 (*_bfd_error_handler) (_("%B(%A+0x%lx): %s reloc against "
3153 "local symbol"),
3154 abfd,
3155 sec,
3156 (long) rel->r_offset,
3157 ppc_elf_howto_table[r_type]->name);
3158 bfd_set_error (bfd_error_bad_value);
3159 return FALSE;
3160 }
3161 else
3162 {
3163 bfd_vma addend = r_type == R_PPC_PLTREL24 ? rel->r_addend : 0;
3164
3165 h->needs_plt = 1;
3166 if (!update_plt_info (abfd, h, got2, addend))
3167 return FALSE;
3168 }
3169 break;
3170
3171 /* The following relocations don't need to propagate the
3172 relocation if linking a shared object since they are
3173 section relative. */
3174 case R_PPC_SECTOFF:
3175 case R_PPC_SECTOFF_LO:
3176 case R_PPC_SECTOFF_HI:
3177 case R_PPC_SECTOFF_HA:
3178 case R_PPC_DTPREL16:
3179 case R_PPC_DTPREL16_LO:
3180 case R_PPC_DTPREL16_HI:
3181 case R_PPC_DTPREL16_HA:
3182 case R_PPC_TOC16:
3183 break;
3184
3185 case R_PPC_REL16:
3186 case R_PPC_REL16_LO:
3187 case R_PPC_REL16_HI:
3188 case R_PPC_REL16_HA:
3189 htab->new_plt = 1;
3190 break;
3191
3192 /* These are just markers. */
3193 case R_PPC_TLS:
3194 case R_PPC_EMB_MRKREF:
3195 case R_PPC_NONE:
3196 case R_PPC_max:
3197 break;
3198
3199 /* These should only appear in dynamic objects. */
3200 case R_PPC_COPY:
3201 case R_PPC_GLOB_DAT:
3202 case R_PPC_JMP_SLOT:
3203 case R_PPC_RELATIVE:
3204 break;
3205
3206 /* These aren't handled yet. We'll report an error later. */
3207 case R_PPC_ADDR30:
3208 case R_PPC_EMB_RELSEC16:
3209 case R_PPC_EMB_RELST_LO:
3210 case R_PPC_EMB_RELST_HI:
3211 case R_PPC_EMB_RELST_HA:
3212 case R_PPC_EMB_BIT_FLD:
3213 break;
3214
3215 /* This refers only to functions defined in the shared library. */
3216 case R_PPC_LOCAL24PC:
3217 if (h && h == htab->elf.hgot)
3218 htab->old_plt = 1;
3219 break;
3220
3221 /* This relocation describes the C++ object vtable hierarchy.
3222 Reconstruct it for later use during GC. */
3223 case R_PPC_GNU_VTINHERIT:
3224 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
3225 return FALSE;
3226 break;
3227
3228 /* This relocation describes which C++ vtable entries are actually
3229 used. Record for later use during GC. */
3230 case R_PPC_GNU_VTENTRY:
3231 if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
3232 return FALSE;
3233 break;
3234
3235 /* We shouldn't really be seeing these. */
3236 case R_PPC_TPREL32:
3237 if (info->shared)
3238 info->flags |= DF_STATIC_TLS;
3239 goto dodyn;
3240
3241 /* Nor these. */
3242 case R_PPC_DTPMOD32:
3243 case R_PPC_DTPREL32:
3244 goto dodyn;
3245
3246 case R_PPC_TPREL16:
3247 case R_PPC_TPREL16_LO:
3248 case R_PPC_TPREL16_HI:
3249 case R_PPC_TPREL16_HA:
3250 if (info->shared)
3251 info->flags |= DF_STATIC_TLS;
3252 goto dodyn;
3253
3254 case R_PPC_REL32:
3255 if (h == NULL
3256 && got2 != NULL
3257 && (sec->flags & SEC_CODE) != 0
3258 && (info->shared || info->pie)
3259 && !htab->old_plt)
3260 {
3261 /* Old -fPIC gcc code has .long LCTOC1-LCFx just before
3262 the start of a function, which assembles to a REL32
3263 reference to .got2. If we detect one of these, then
3264 force the old PLT layout because the linker cannot
3265 reliably deduce the GOT pointer value needed for
3266 PLT call stubs. */
3267 asection *s;
3268
3269 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec, sec,
3270 r_symndx);
3271 if (s == got2)
3272 htab->old_plt = 1;
3273 }
3274 /* fall through */
3275
3276 case R_PPC_REL24:
3277 case R_PPC_REL14:
3278 case R_PPC_REL14_BRTAKEN:
3279 case R_PPC_REL14_BRNTAKEN:
3280 if (h == NULL)
3281 break;
3282 if (h == htab->elf.hgot)
3283 {
3284 htab->old_plt = 1;
3285 break;
3286 }
3287 /* fall through */
3288
3289 case R_PPC_ADDR32:
3290 case R_PPC_ADDR24:
3291 case R_PPC_ADDR16:
3292 case R_PPC_ADDR16_LO:
3293 case R_PPC_ADDR16_HI:
3294 case R_PPC_ADDR16_HA:
3295 case R_PPC_ADDR14:
3296 case R_PPC_ADDR14_BRTAKEN:
3297 case R_PPC_ADDR14_BRNTAKEN:
3298 case R_PPC_UADDR32:
3299 case R_PPC_UADDR16:
3300 if (h != NULL && !info->shared)
3301 {
3302 /* We may need a plt entry if the symbol turns out to be
3303 a function defined in a dynamic object. */
3304 if (!update_plt_info (abfd, h, NULL, 0))
3305 return FALSE;
3306
3307 /* We may need a copy reloc too. */
3308 h->non_got_ref = 1;
3309 }
3310
3311 dodyn:
3312 /* If we are creating a shared library, and this is a reloc
3313 against a global symbol, or a non PC relative reloc
3314 against a local symbol, then we need to copy the reloc
3315 into the shared library. However, if we are linking with
3316 -Bsymbolic, we do not need to copy a reloc against a
3317 global symbol which is defined in an object we are
3318 including in the link (i.e., DEF_REGULAR is set). At
3319 this point we have not seen all the input files, so it is
3320 possible that DEF_REGULAR is not set now but will be set
3321 later (it is never cleared). In case of a weak definition,
3322 DEF_REGULAR may be cleared later by a strong definition in
3323 a shared library. We account for that possibility below by
3324 storing information in the dyn_relocs field of the hash
3325 table entry. A similar situation occurs when creating
3326 shared libraries and symbol visibility changes render the
3327 symbol local.
3328
3329 If on the other hand, we are creating an executable, we
3330 may need to keep relocations for symbols satisfied by a
3331 dynamic library if we manage to avoid copy relocs for the
3332 symbol. */
3333 if ((info->shared
3334 && (MUST_BE_DYN_RELOC (r_type)
3335 || (h != NULL
3336 && (! info->symbolic
3337 || h->root.type == bfd_link_hash_defweak
3338 || !h->def_regular))))
3339 || (ELIMINATE_COPY_RELOCS
3340 && !info->shared
3341 && h != NULL
3342 && (h->root.type == bfd_link_hash_defweak
3343 || !h->def_regular)))
3344 {
3345 struct ppc_elf_dyn_relocs *p;
3346 struct ppc_elf_dyn_relocs **head;
3347
3348 #ifdef DEBUG
3349 fprintf (stderr,
3350 "ppc_elf_check_relocs needs to "
3351 "create relocation for %s\n",
3352 (h && h->root.root.string
3353 ? h->root.root.string : "<unknown>"));
3354 #endif
3355 if (sreloc == NULL)
3356 {
3357 const char *name;
3358
3359 name = (bfd_elf_string_from_elf_section
3360 (abfd,
3361 elf_elfheader (abfd)->e_shstrndx,
3362 elf_section_data (sec)->rel_hdr.sh_name));
3363 if (name == NULL)
3364 return FALSE;
3365
3366 BFD_ASSERT (strncmp (name, ".rela", 5) == 0
3367 && strcmp (bfd_get_section_name (abfd, sec),
3368 name + 5) == 0);
3369
3370 if (htab->elf.dynobj == NULL)
3371 htab->elf.dynobj = abfd;
3372 sreloc = bfd_get_section_by_name (htab->elf.dynobj, name);
3373 if (sreloc == NULL)
3374 {
3375 flagword flags;
3376
3377 flags = (SEC_HAS_CONTENTS | SEC_READONLY
3378 | SEC_IN_MEMORY | SEC_LINKER_CREATED
3379 | SEC_ALLOC | SEC_LOAD);
3380 sreloc = bfd_make_section_with_flags (htab->elf.dynobj,
3381 name,
3382 flags);
3383 if (sreloc == NULL
3384 || ! bfd_set_section_alignment (htab->elf.dynobj,
3385 sreloc, 2))
3386 return FALSE;
3387 }
3388 elf_section_data (sec)->sreloc = sreloc;
3389 }
3390
3391 /* If this is a global symbol, we count the number of
3392 relocations we need for this symbol. */
3393 if (h != NULL)
3394 {
3395 head = &ppc_elf_hash_entry (h)->dyn_relocs;
3396 }
3397 else
3398 {
3399 /* Track dynamic relocs needed for local syms too.
3400 We really need local syms available to do this
3401 easily. Oh well. */
3402
3403 asection *s;
3404 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec,
3405 sec, r_symndx);
3406 if (s == NULL)
3407 return FALSE;
3408
3409 head = ((struct ppc_elf_dyn_relocs **)
3410 &elf_section_data (s)->local_dynrel);
3411 }
3412
3413 p = *head;
3414 if (p == NULL || p->sec != sec)
3415 {
3416 p = bfd_alloc (htab->elf.dynobj, sizeof *p);
3417 if (p == NULL)
3418 return FALSE;
3419 p->next = *head;
3420 *head = p;
3421 p->sec = sec;
3422 p->count = 0;
3423 p->pc_count = 0;
3424 }
3425
3426 p->count += 1;
3427 if (!MUST_BE_DYN_RELOC (r_type))
3428 p->pc_count += 1;
3429 }
3430
3431 break;
3432 }
3433 }
3434
3435 return TRUE;
3436 }
3437
3438 /* Merge backend specific data from an object file to the output
3439 object file when linking. */
3440
3441 static bfd_boolean
ppc_elf_merge_private_bfd_data(bfd * ibfd,bfd * obfd)3442 ppc_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
3443 {
3444 flagword old_flags;
3445 flagword new_flags;
3446 bfd_boolean error;
3447
3448 if (!is_ppc_elf_target (ibfd->xvec)
3449 || !is_ppc_elf_target (obfd->xvec))
3450 return TRUE;
3451
3452 /* Check if we have the same endianess. */
3453 if (! _bfd_generic_verify_endian_match (ibfd, obfd))
3454 return FALSE;
3455
3456 new_flags = elf_elfheader (ibfd)->e_flags;
3457 old_flags = elf_elfheader (obfd)->e_flags;
3458 if (!elf_flags_init (obfd))
3459 {
3460 /* First call, no flags set. */
3461 elf_flags_init (obfd) = TRUE;
3462 elf_elfheader (obfd)->e_flags = new_flags;
3463 }
3464
3465 /* Compatible flags are ok. */
3466 else if (new_flags == old_flags)
3467 ;
3468
3469 /* Incompatible flags. */
3470 else
3471 {
3472 /* Warn about -mrelocatable mismatch. Allow -mrelocatable-lib
3473 to be linked with either. */
3474 error = FALSE;
3475 if ((new_flags & EF_PPC_RELOCATABLE) != 0
3476 && (old_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0)
3477 {
3478 error = TRUE;
3479 (*_bfd_error_handler)
3480 (_("%B: compiled with -mrelocatable and linked with "
3481 "modules compiled normally"), ibfd);
3482 }
3483 else if ((new_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0
3484 && (old_flags & EF_PPC_RELOCATABLE) != 0)
3485 {
3486 error = TRUE;
3487 (*_bfd_error_handler)
3488 (_("%B: compiled normally and linked with "
3489 "modules compiled with -mrelocatable"), ibfd);
3490 }
3491
3492 /* The output is -mrelocatable-lib iff both the input files are. */
3493 if (! (new_flags & EF_PPC_RELOCATABLE_LIB))
3494 elf_elfheader (obfd)->e_flags &= ~EF_PPC_RELOCATABLE_LIB;
3495
3496 /* The output is -mrelocatable iff it can't be -mrelocatable-lib,
3497 but each input file is either -mrelocatable or -mrelocatable-lib. */
3498 if (! (elf_elfheader (obfd)->e_flags & EF_PPC_RELOCATABLE_LIB)
3499 && (new_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE))
3500 && (old_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE)))
3501 elf_elfheader (obfd)->e_flags |= EF_PPC_RELOCATABLE;
3502
3503 /* Do not warn about eabi vs. V.4 mismatch, just or in the bit if
3504 any module uses it. */
3505 elf_elfheader (obfd)->e_flags |= (new_flags & EF_PPC_EMB);
3506
3507 new_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
3508 old_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
3509
3510 /* Warn about any other mismatches. */
3511 if (new_flags != old_flags)
3512 {
3513 error = TRUE;
3514 (*_bfd_error_handler)
3515 (_("%B: uses different e_flags (0x%lx) fields "
3516 "than previous modules (0x%lx)"),
3517 ibfd, (long) new_flags, (long) old_flags);
3518 }
3519
3520 if (error)
3521 {
3522 bfd_set_error (bfd_error_bad_value);
3523 return FALSE;
3524 }
3525 }
3526
3527 return TRUE;
3528 }
3529
3530 /* Choose which PLT scheme to use, and set .plt flags appropriately.
3531 Returns -1 on error, 0 for old PLT, 1 for new PLT. */
3532 int
ppc_elf_select_plt_layout(bfd * output_bfd ATTRIBUTE_UNUSED,struct bfd_link_info * info,int force_old_plt)3533 ppc_elf_select_plt_layout (bfd *output_bfd ATTRIBUTE_UNUSED,
3534 struct bfd_link_info *info,
3535 int force_old_plt)
3536 {
3537 struct ppc_elf_link_hash_table *htab;
3538 flagword flags;
3539
3540 htab = ppc_elf_hash_table (info);
3541 if (force_old_plt || !htab->new_plt)
3542 htab->old_plt = 1;
3543
3544 if (htab->is_vxworks)
3545 {
3546 /* The VxWorks PLT is a loaded section with contents. */
3547 flags = SEC_ALLOC | SEC_CODE | SEC_IN_MEMORY | SEC_LINKER_CREATED
3548 | SEC_HAS_CONTENTS | SEC_LOAD | SEC_READONLY;
3549
3550 if (htab->plt != NULL
3551 && !bfd_set_section_flags (htab->elf.dynobj, htab->plt, flags))
3552 return -1;
3553 }
3554 else if (!htab->old_plt)
3555 {
3556 flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS
3557 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
3558
3559 /* The new PLT is a loaded section. */
3560 if (htab->plt != NULL
3561 && !bfd_set_section_flags (htab->elf.dynobj, htab->plt, flags))
3562 return -1;
3563
3564 /* The new GOT is not executable. */
3565 if (htab->got != NULL
3566 && !bfd_set_section_flags (htab->elf.dynobj, htab->got, flags))
3567 return -1;
3568 }
3569 else
3570 {
3571 /* Stop an unused .glink section from affecting .text alignment. */
3572 if (htab->glink != NULL
3573 && !bfd_set_section_alignment (htab->elf.dynobj, htab->glink, 0))
3574 return -1;
3575 }
3576 return !htab->old_plt;
3577 }
3578
3579 /* Return the section that should be marked against GC for a given
3580 relocation. */
3581
3582 static asection *
ppc_elf_gc_mark_hook(asection * sec,struct bfd_link_info * info ATTRIBUTE_UNUSED,Elf_Internal_Rela * rel,struct elf_link_hash_entry * h,Elf_Internal_Sym * sym)3583 ppc_elf_gc_mark_hook (asection *sec,
3584 struct bfd_link_info *info ATTRIBUTE_UNUSED,
3585 Elf_Internal_Rela *rel,
3586 struct elf_link_hash_entry *h,
3587 Elf_Internal_Sym *sym)
3588 {
3589 if (h != NULL)
3590 {
3591 switch (ELF32_R_TYPE (rel->r_info))
3592 {
3593 case R_PPC_GNU_VTINHERIT:
3594 case R_PPC_GNU_VTENTRY:
3595 break;
3596
3597 default:
3598 switch (h->root.type)
3599 {
3600 case bfd_link_hash_defined:
3601 case bfd_link_hash_defweak:
3602 return h->root.u.def.section;
3603
3604 case bfd_link_hash_common:
3605 return h->root.u.c.p->section;
3606
3607 default:
3608 break;
3609 }
3610 }
3611 }
3612 else
3613 return bfd_section_from_elf_index (sec->owner, sym->st_shndx);
3614
3615 return NULL;
3616 }
3617
3618 /* Update the got, plt and dynamic reloc reference counts for the
3619 section being removed. */
3620
3621 static bfd_boolean
ppc_elf_gc_sweep_hook(bfd * abfd,struct bfd_link_info * info,asection * sec,const Elf_Internal_Rela * relocs)3622 ppc_elf_gc_sweep_hook (bfd *abfd,
3623 struct bfd_link_info *info,
3624 asection *sec,
3625 const Elf_Internal_Rela *relocs)
3626 {
3627 struct ppc_elf_link_hash_table *htab;
3628 Elf_Internal_Shdr *symtab_hdr;
3629 struct elf_link_hash_entry **sym_hashes;
3630 bfd_signed_vma *local_got_refcounts;
3631 const Elf_Internal_Rela *rel, *relend;
3632 asection *got2;
3633
3634 if ((sec->flags & SEC_ALLOC) == 0)
3635 return TRUE;
3636
3637 elf_section_data (sec)->local_dynrel = NULL;
3638
3639 htab = ppc_elf_hash_table (info);
3640 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
3641 sym_hashes = elf_sym_hashes (abfd);
3642 local_got_refcounts = elf_local_got_refcounts (abfd);
3643 got2 = bfd_get_section_by_name (abfd, ".got2");
3644
3645 relend = relocs + sec->reloc_count;
3646 for (rel = relocs; rel < relend; rel++)
3647 {
3648 unsigned long r_symndx;
3649 enum elf_ppc_reloc_type r_type;
3650 struct elf_link_hash_entry *h = NULL;
3651
3652 r_symndx = ELF32_R_SYM (rel->r_info);
3653 if (r_symndx >= symtab_hdr->sh_info)
3654 {
3655 struct ppc_elf_dyn_relocs **pp, *p;
3656 struct ppc_elf_link_hash_entry *eh;
3657
3658 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3659 while (h->root.type == bfd_link_hash_indirect
3660 || h->root.type == bfd_link_hash_warning)
3661 h = (struct elf_link_hash_entry *) h->root.u.i.link;
3662 eh = (struct ppc_elf_link_hash_entry *) h;
3663
3664 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
3665 if (p->sec == sec)
3666 {
3667 /* Everything must go for SEC. */
3668 *pp = p->next;
3669 break;
3670 }
3671 }
3672
3673 r_type = ELF32_R_TYPE (rel->r_info);
3674 switch (r_type)
3675 {
3676 case R_PPC_GOT_TLSLD16:
3677 case R_PPC_GOT_TLSLD16_LO:
3678 case R_PPC_GOT_TLSLD16_HI:
3679 case R_PPC_GOT_TLSLD16_HA:
3680 htab->tlsld_got.refcount -= 1;
3681 /* Fall thru */
3682
3683 case R_PPC_GOT_TLSGD16:
3684 case R_PPC_GOT_TLSGD16_LO:
3685 case R_PPC_GOT_TLSGD16_HI:
3686 case R_PPC_GOT_TLSGD16_HA:
3687 case R_PPC_GOT_TPREL16:
3688 case R_PPC_GOT_TPREL16_LO:
3689 case R_PPC_GOT_TPREL16_HI:
3690 case R_PPC_GOT_TPREL16_HA:
3691 case R_PPC_GOT_DTPREL16:
3692 case R_PPC_GOT_DTPREL16_LO:
3693 case R_PPC_GOT_DTPREL16_HI:
3694 case R_PPC_GOT_DTPREL16_HA:
3695 case R_PPC_GOT16:
3696 case R_PPC_GOT16_LO:
3697 case R_PPC_GOT16_HI:
3698 case R_PPC_GOT16_HA:
3699 if (h != NULL)
3700 {
3701 if (h->got.refcount > 0)
3702 h->got.refcount--;
3703 }
3704 else if (local_got_refcounts != NULL)
3705 {
3706 if (local_got_refcounts[r_symndx] > 0)
3707 local_got_refcounts[r_symndx]--;
3708 }
3709 break;
3710
3711 case R_PPC_REL24:
3712 case R_PPC_REL14:
3713 case R_PPC_REL14_BRTAKEN:
3714 case R_PPC_REL14_BRNTAKEN:
3715 case R_PPC_REL32:
3716 if (h == NULL || h == htab->elf.hgot)
3717 break;
3718 /* Fall thru */
3719
3720 case R_PPC_ADDR32:
3721 case R_PPC_ADDR24:
3722 case R_PPC_ADDR16:
3723 case R_PPC_ADDR16_LO:
3724 case R_PPC_ADDR16_HI:
3725 case R_PPC_ADDR16_HA:
3726 case R_PPC_ADDR14:
3727 case R_PPC_ADDR14_BRTAKEN:
3728 case R_PPC_ADDR14_BRNTAKEN:
3729 case R_PPC_UADDR32:
3730 case R_PPC_UADDR16:
3731 case R_PPC_PLT32:
3732 case R_PPC_PLTREL24:
3733 case R_PPC_PLT16_LO:
3734 case R_PPC_PLT16_HI:
3735 case R_PPC_PLT16_HA:
3736 if (h != NULL)
3737 {
3738 bfd_vma addend = r_type == R_PPC_PLTREL24 ? rel->r_addend : 0;
3739 struct plt_entry *ent = find_plt_ent (h, got2, addend);
3740 if (ent->plt.refcount > 0)
3741 ent->plt.refcount -= 1;
3742 }
3743 break;
3744
3745 default:
3746 break;
3747 }
3748 }
3749 return TRUE;
3750 }
3751
3752 /* Set htab->tls_get_addr and call the generic ELF tls_setup function. */
3753
3754 asection *
ppc_elf_tls_setup(bfd * obfd,struct bfd_link_info * info)3755 ppc_elf_tls_setup (bfd *obfd, struct bfd_link_info *info)
3756 {
3757 struct ppc_elf_link_hash_table *htab;
3758
3759 htab = ppc_elf_hash_table (info);
3760 if (!htab->old_plt
3761 && htab->plt != NULL
3762 && htab->plt->output_section != NULL)
3763 {
3764 elf_section_type (htab->plt->output_section) = SHT_PROGBITS;
3765 elf_section_flags (htab->plt->output_section) = SHF_ALLOC + SHF_WRITE;
3766 }
3767
3768 htab->tls_get_addr = elf_link_hash_lookup (&htab->elf, "__tls_get_addr",
3769 FALSE, FALSE, TRUE);
3770 return _bfd_elf_tls_setup (obfd, info);
3771 }
3772
3773 /* Run through all the TLS relocs looking for optimization
3774 opportunities. */
3775
3776 bfd_boolean
ppc_elf_tls_optimize(bfd * obfd ATTRIBUTE_UNUSED,struct bfd_link_info * info)3777 ppc_elf_tls_optimize (bfd *obfd ATTRIBUTE_UNUSED,
3778 struct bfd_link_info *info)
3779 {
3780 bfd *ibfd;
3781 asection *sec;
3782 struct ppc_elf_link_hash_table *htab;
3783
3784 if (info->relocatable || info->shared)
3785 return TRUE;
3786
3787 htab = ppc_elf_hash_table (info);
3788 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
3789 {
3790 Elf_Internal_Sym *locsyms = NULL;
3791 Elf_Internal_Shdr *symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
3792
3793 for (sec = ibfd->sections; sec != NULL; sec = sec->next)
3794 if (sec->has_tls_reloc && !bfd_is_abs_section (sec->output_section))
3795 {
3796 Elf_Internal_Rela *relstart, *rel, *relend;
3797 int expecting_tls_get_addr;
3798
3799 /* Read the relocations. */
3800 relstart = _bfd_elf_link_read_relocs (ibfd, sec, NULL, NULL,
3801 info->keep_memory);
3802 if (relstart == NULL)
3803 return FALSE;
3804
3805 expecting_tls_get_addr = 0;
3806 relend = relstart + sec->reloc_count;
3807 for (rel = relstart; rel < relend; rel++)
3808 {
3809 enum elf_ppc_reloc_type r_type;
3810 unsigned long r_symndx;
3811 struct elf_link_hash_entry *h = NULL;
3812 char *tls_mask;
3813 char tls_set, tls_clear;
3814 bfd_boolean is_local;
3815
3816 r_symndx = ELF32_R_SYM (rel->r_info);
3817 if (r_symndx >= symtab_hdr->sh_info)
3818 {
3819 struct elf_link_hash_entry **sym_hashes;
3820
3821 sym_hashes = elf_sym_hashes (ibfd);
3822 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
3823 while (h->root.type == bfd_link_hash_indirect
3824 || h->root.type == bfd_link_hash_warning)
3825 h = (struct elf_link_hash_entry *) h->root.u.i.link;
3826 }
3827
3828 is_local = FALSE;
3829 if (h == NULL
3830 || !h->def_dynamic)
3831 is_local = TRUE;
3832
3833 r_type = ELF32_R_TYPE (rel->r_info);
3834 switch (r_type)
3835 {
3836 case R_PPC_GOT_TLSLD16:
3837 case R_PPC_GOT_TLSLD16_LO:
3838 case R_PPC_GOT_TLSLD16_HI:
3839 case R_PPC_GOT_TLSLD16_HA:
3840 /* These relocs should never be against a symbol
3841 defined in a shared lib. Leave them alone if
3842 that turns out to be the case. */
3843 expecting_tls_get_addr = 0;
3844 htab->tlsld_got.refcount -= 1;
3845 if (!is_local)
3846 continue;
3847
3848 /* LD -> LE */
3849 tls_set = 0;
3850 tls_clear = TLS_LD;
3851 expecting_tls_get_addr = 1;
3852 break;
3853
3854 case R_PPC_GOT_TLSGD16:
3855 case R_PPC_GOT_TLSGD16_LO:
3856 case R_PPC_GOT_TLSGD16_HI:
3857 case R_PPC_GOT_TLSGD16_HA:
3858 if (is_local)
3859 /* GD -> LE */
3860 tls_set = 0;
3861 else
3862 /* GD -> IE */
3863 tls_set = TLS_TLS | TLS_TPRELGD;
3864 tls_clear = TLS_GD;
3865 expecting_tls_get_addr = 1;
3866 break;
3867
3868 case R_PPC_GOT_TPREL16:
3869 case R_PPC_GOT_TPREL16_LO:
3870 case R_PPC_GOT_TPREL16_HI:
3871 case R_PPC_GOT_TPREL16_HA:
3872 expecting_tls_get_addr = 0;
3873 if (is_local)
3874 {
3875 /* IE -> LE */
3876 tls_set = 0;
3877 tls_clear = TLS_TPREL;
3878 break;
3879 }
3880 else
3881 continue;
3882
3883 case R_PPC_REL14:
3884 case R_PPC_REL14_BRTAKEN:
3885 case R_PPC_REL14_BRNTAKEN:
3886 case R_PPC_REL24:
3887 if (expecting_tls_get_addr
3888 && h != NULL
3889 && h == htab->tls_get_addr)
3890 {
3891 struct plt_entry *ent = find_plt_ent (h, NULL, 0);
3892 if (ent != NULL && ent->plt.refcount > 0)
3893 ent->plt.refcount -= 1;
3894 }
3895 expecting_tls_get_addr = 0;
3896 continue;
3897
3898 default:
3899 expecting_tls_get_addr = 0;
3900 continue;
3901 }
3902
3903 if (h != NULL)
3904 {
3905 if (tls_set == 0)
3906 {
3907 /* We managed to get rid of a got entry. */
3908 if (h->got.refcount > 0)
3909 h->got.refcount -= 1;
3910 }
3911 tls_mask = &ppc_elf_hash_entry (h)->tls_mask;
3912 }
3913 else
3914 {
3915 Elf_Internal_Sym *sym;
3916 bfd_signed_vma *lgot_refs;
3917 char *lgot_masks;
3918
3919 if (locsyms == NULL)
3920 {
3921 locsyms = (Elf_Internal_Sym *) symtab_hdr->contents;
3922 if (locsyms == NULL)
3923 locsyms = bfd_elf_get_elf_syms (ibfd, symtab_hdr,
3924 symtab_hdr->sh_info,
3925 0, NULL, NULL, NULL);
3926 if (locsyms == NULL)
3927 {
3928 if (elf_section_data (sec)->relocs != relstart)
3929 free (relstart);
3930 return FALSE;
3931 }
3932 }
3933 sym = locsyms + r_symndx;
3934 lgot_refs = elf_local_got_refcounts (ibfd);
3935 if (lgot_refs == NULL)
3936 abort ();
3937 if (tls_set == 0)
3938 {
3939 /* We managed to get rid of a got entry. */
3940 if (lgot_refs[r_symndx] > 0)
3941 lgot_refs[r_symndx] -= 1;
3942 }
3943 lgot_masks = (char *) (lgot_refs + symtab_hdr->sh_info);
3944 tls_mask = &lgot_masks[r_symndx];
3945 }
3946
3947 *tls_mask |= tls_set;
3948 *tls_mask &= ~tls_clear;
3949 }
3950
3951 if (elf_section_data (sec)->relocs != relstart)
3952 free (relstart);
3953 }
3954
3955 if (locsyms != NULL
3956 && (symtab_hdr->contents != (unsigned char *) locsyms))
3957 {
3958 if (!info->keep_memory)
3959 free (locsyms);
3960 else
3961 symtab_hdr->contents = (unsigned char *) locsyms;
3962 }
3963 }
3964 return TRUE;
3965 }
3966
3967 /* Adjust a symbol defined by a dynamic object and referenced by a
3968 regular object. The current definition is in some section of the
3969 dynamic object, but we're not including those sections. We have to
3970 change the definition to something the rest of the link can
3971 understand. */
3972
3973 static bfd_boolean
ppc_elf_adjust_dynamic_symbol(struct bfd_link_info * info,struct elf_link_hash_entry * h)3974 ppc_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
3975 struct elf_link_hash_entry *h)
3976 {
3977 struct ppc_elf_link_hash_table *htab;
3978 asection *s;
3979 unsigned int power_of_two;
3980
3981 #ifdef DEBUG
3982 fprintf (stderr, "ppc_elf_adjust_dynamic_symbol called for %s\n",
3983 h->root.root.string);
3984 #endif
3985
3986 /* Make sure we know what is going on here. */
3987 htab = ppc_elf_hash_table (info);
3988 BFD_ASSERT (htab->elf.dynobj != NULL
3989 && (h->needs_plt
3990 || h->u.weakdef != NULL
3991 || (h->def_dynamic
3992 && h->ref_regular
3993 && !h->def_regular)));
3994
3995 /* Deal with function syms. */
3996 if (h->type == STT_FUNC
3997 || h->needs_plt)
3998 {
3999 /* Clear procedure linkage table information for any symbol that
4000 won't need a .plt entry. */
4001 struct plt_entry *ent;
4002 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
4003 if (ent->plt.refcount > 0)
4004 break;
4005 if (ent == NULL
4006 || SYMBOL_CALLS_LOCAL (info, h)
4007 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
4008 && h->root.type == bfd_link_hash_undefweak))
4009 {
4010 /* A PLT entry is not required/allowed when:
4011
4012 1. We are not using ld.so; because then the PLT entry
4013 can't be set up, so we can't use one. In this case,
4014 ppc_elf_adjust_dynamic_symbol won't even be called.
4015
4016 2. GC has rendered the entry unused.
4017
4018 3. We know for certain that a call to this symbol
4019 will go to this object, or will remain undefined. */
4020 h->plt.plist = NULL;
4021 h->needs_plt = 0;
4022 }
4023 return TRUE;
4024 }
4025 else
4026 h->plt.plist = NULL;
4027
4028 /* If this is a weak symbol, and there is a real definition, the
4029 processor independent code will have arranged for us to see the
4030 real definition first, and we can just use the same value. */
4031 if (h->u.weakdef != NULL)
4032 {
4033 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
4034 || h->u.weakdef->root.type == bfd_link_hash_defweak);
4035 h->root.u.def.section = h->u.weakdef->root.u.def.section;
4036 h->root.u.def.value = h->u.weakdef->root.u.def.value;
4037 if (ELIMINATE_COPY_RELOCS)
4038 h->non_got_ref = h->u.weakdef->non_got_ref;
4039 return TRUE;
4040 }
4041
4042 /* This is a reference to a symbol defined by a dynamic object which
4043 is not a function. */
4044
4045 /* First, a fudge for old shared libs that export some symbols they
4046 should not. */
4047 if (!h->def_regular
4048 && (strcmp (h->root.root.string, "_SDA_BASE_") == 0
4049 || strcmp (h->root.root.string, "_SDA2_BASE_") == 0))
4050 {
4051 /* These symbols will be defined later, as if they were defined in
4052 a linker script. We don't want to use a definition in a shared
4053 object. */
4054 const struct elf_backend_data *bed;
4055
4056 bed = get_elf_backend_data (htab->elf.dynobj);
4057 (*bed->elf_backend_hide_symbol) (info, h, TRUE);
4058 h->root.type = bfd_link_hash_undefined;
4059 h->root.u.undef.abfd = htab->elf.dynobj;
4060 return TRUE;
4061 }
4062
4063 /* If we are creating a shared library, we must presume that the
4064 only references to the symbol are via the global offset table.
4065 For such cases we need not do anything here; the relocations will
4066 be handled correctly by relocate_section. */
4067 if (info->shared)
4068 return TRUE;
4069
4070 /* If there are no references to this symbol that do not use the
4071 GOT, we don't need to generate a copy reloc. */
4072 if (!h->non_got_ref)
4073 return TRUE;
4074
4075 /* If we didn't find any dynamic relocs in read-only sections, then we'll
4076 be keeping the dynamic relocs and avoiding the copy reloc. We can't
4077 do this if there are any small data relocations. */
4078 if (ELIMINATE_COPY_RELOCS
4079 && !ppc_elf_hash_entry (h)->has_sda_refs)
4080 {
4081 struct ppc_elf_dyn_relocs *p;
4082 for (p = ppc_elf_hash_entry (h)->dyn_relocs; p != NULL; p = p->next)
4083 {
4084 s = p->sec->output_section;
4085 if (s != NULL && (s->flags & SEC_READONLY) != 0)
4086 break;
4087 }
4088
4089 if (p == NULL)
4090 {
4091 h->non_got_ref = 0;
4092 return TRUE;
4093 }
4094 }
4095
4096 /* We must allocate the symbol in our .dynbss section, which will
4097 become part of the .bss section of the executable. There will be
4098 an entry for this symbol in the .dynsym section. The dynamic
4099 object will contain position independent code, so all references
4100 from the dynamic object to this symbol will go through the global
4101 offset table. The dynamic linker will use the .dynsym entry to
4102 determine the address it must put in the global offset table, so
4103 both the dynamic object and the regular object will refer to the
4104 same memory location for the variable.
4105
4106 Of course, if the symbol is referenced using SDAREL relocs, we
4107 must instead allocate it in .sbss. */
4108
4109 if (ppc_elf_hash_entry (h)->has_sda_refs)
4110 s = htab->dynsbss;
4111 else
4112 s = htab->dynbss;
4113 BFD_ASSERT (s != NULL);
4114
4115 /* We must generate a R_PPC_COPY reloc to tell the dynamic linker to
4116 copy the initial value out of the dynamic object and into the
4117 runtime process image. We need to remember the offset into the
4118 .rela.bss section we are going to use. */
4119 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
4120 {
4121 asection *srel;
4122
4123 if (ppc_elf_hash_entry (h)->has_sda_refs)
4124 srel = htab->relsbss;
4125 else
4126 srel = htab->relbss;
4127 BFD_ASSERT (srel != NULL);
4128 srel->size += sizeof (Elf32_External_Rela);
4129 h->needs_copy = 1;
4130 }
4131
4132 /* We need to figure out the alignment required for this symbol. I
4133 have no idea how ELF linkers handle this. */
4134 power_of_two = bfd_log2 (h->size);
4135 if (power_of_two > 4)
4136 power_of_two = 4;
4137
4138 /* Apply the required alignment. */
4139 s->size = BFD_ALIGN (s->size, (bfd_size_type) (1 << power_of_two));
4140 if (power_of_two > bfd_get_section_alignment (htab->elf.dynobj, s))
4141 {
4142 if (! bfd_set_section_alignment (htab->elf.dynobj, s, power_of_two))
4143 return FALSE;
4144 }
4145
4146 /* Define the symbol as being at this point in the section. */
4147 h->root.u.def.section = s;
4148 h->root.u.def.value = s->size;
4149
4150 /* Increment the section size to make room for the symbol. */
4151 s->size += h->size;
4152
4153 return TRUE;
4154 }
4155
4156 /* Allocate NEED contiguous space in .got, and return the offset.
4157 Handles allocation of the got header when crossing 32k. */
4158
4159 static bfd_vma
allocate_got(struct ppc_elf_link_hash_table * htab,unsigned int need)4160 allocate_got (struct ppc_elf_link_hash_table *htab, unsigned int need)
4161 {
4162 bfd_vma where;
4163 unsigned int max_before_header = 32768;
4164
4165 if (htab->old_plt)
4166 max_before_header = 32764;
4167
4168 if (htab->is_vxworks)
4169 {
4170 where = htab->got->size;
4171 htab->got->size += need;
4172 }
4173 else if (need <= htab->got_gap)
4174 {
4175 where = max_before_header - htab->got_gap;
4176 htab->got_gap -= need;
4177 }
4178 else
4179 {
4180 if (htab->got->size + need > max_before_header
4181 && htab->got->size <= max_before_header)
4182 {
4183 htab->got_gap = max_before_header - htab->got->size;
4184 htab->got->size = max_before_header + htab->got_header_size;
4185 }
4186 where = htab->got->size;
4187 htab->got->size += need;
4188 }
4189 return where;
4190 }
4191
4192 /* Allocate space in associated reloc sections for dynamic relocs. */
4193
4194 static bfd_boolean
allocate_dynrelocs(struct elf_link_hash_entry * h,void * inf)4195 allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
4196 {
4197 struct bfd_link_info *info = inf;
4198 struct ppc_elf_link_hash_entry *eh;
4199 struct ppc_elf_link_hash_table *htab;
4200 struct ppc_elf_dyn_relocs *p;
4201
4202 if (h->root.type == bfd_link_hash_indirect)
4203 return TRUE;
4204
4205 if (h->root.type == bfd_link_hash_warning)
4206 /* When warning symbols are created, they **replace** the "real"
4207 entry in the hash table, thus we never get to see the real
4208 symbol in a hash traversal. So look at it now. */
4209 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4210
4211 htab = ppc_elf_hash_table (info);
4212 if (htab->elf.dynamic_sections_created)
4213 {
4214 struct plt_entry *ent;
4215 bfd_boolean doneone = FALSE;
4216 bfd_vma plt_offset = 0, glink_offset = 0;
4217
4218 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
4219 if (ent->plt.refcount > 0)
4220 {
4221 /* Make sure this symbol is output as a dynamic symbol. */
4222 if (h->dynindx == -1
4223 && !h->forced_local)
4224 {
4225 if (! bfd_elf_link_record_dynamic_symbol (info, h))
4226 return FALSE;
4227 }
4228
4229 if (info->shared
4230 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
4231 {
4232 asection *s = htab->plt;
4233
4234 if (!(htab->old_plt || htab->is_vxworks))
4235 {
4236 if (!doneone)
4237 {
4238 plt_offset = s->size;
4239 s->size += 4;
4240 }
4241 ent->plt.offset = plt_offset;
4242
4243 s = htab->glink;
4244 if (!doneone || info->shared || info->pie)
4245 {
4246 glink_offset = s->size;
4247 s->size += GLINK_ENTRY_SIZE;
4248 }
4249 if (!doneone
4250 && !info->shared
4251 && !h->def_regular)
4252 {
4253 h->root.u.def.section = s;
4254 h->root.u.def.value = glink_offset;
4255 }
4256 ent->glink_offset = glink_offset;
4257 }
4258 else
4259 {
4260 if (!doneone)
4261 {
4262 /* If this is the first .plt entry, make room
4263 for the special first entry. */
4264 if (s->size == 0)
4265 s->size += htab->plt_initial_entry_size;
4266
4267 /* The PowerPC PLT is actually composed of two
4268 parts, the first part is 2 words (for a load
4269 and a jump), and then there is a remaining
4270 word available at the end. */
4271 plt_offset = (htab->plt_initial_entry_size
4272 + (htab->plt_slot_size
4273 * ((s->size
4274 - htab->plt_initial_entry_size)
4275 / htab->plt_entry_size)));
4276
4277 /* If this symbol is not defined in a regular
4278 file, and we are not generating a shared
4279 library, then set the symbol to this location
4280 in the .plt. This is required to make
4281 function pointers compare as equal between
4282 the normal executable and the shared library. */
4283 if (! info->shared
4284 && !h->def_regular)
4285 {
4286 h->root.u.def.section = s;
4287 h->root.u.def.value = plt_offset;
4288 }
4289
4290 /* Make room for this entry. */
4291 s->size += htab->plt_entry_size;
4292 /* After the 8192nd entry, room for two entries
4293 is allocated. */
4294 if (!htab->is_vxworks
4295 && (s->size - htab->plt_initial_entry_size)
4296 / htab->plt_entry_size
4297 > PLT_NUM_SINGLE_ENTRIES)
4298 s->size += htab->plt_entry_size;
4299 }
4300 ent->plt.offset = plt_offset;
4301 }
4302
4303 /* We also need to make an entry in the .rela.plt section. */
4304 if (!doneone)
4305 {
4306 htab->relplt->size += sizeof (Elf32_External_Rela);
4307
4308 if (htab->is_vxworks)
4309 {
4310 /* Allocate space for the unloaded relocations. */
4311 if (!info->shared)
4312 {
4313 if (ent->plt.offset
4314 == (bfd_vma) htab->plt_initial_entry_size)
4315 {
4316 htab->srelplt2->size
4317 += sizeof (Elf32_External_Rela)
4318 * VXWORKS_PLTRESOLVE_RELOCS;
4319 }
4320
4321 htab->srelplt2->size
4322 += sizeof (Elf32_External_Rela)
4323 * VXWORKS_PLT_NON_JMP_SLOT_RELOCS;
4324 }
4325
4326 /* Every PLT entry has an associated GOT entry in
4327 .got.plt. */
4328 htab->sgotplt->size += 4;
4329 }
4330 doneone = TRUE;
4331 }
4332 }
4333 else
4334 ent->plt.offset = (bfd_vma) -1;
4335
4336 if (!doneone)
4337 {
4338 h->plt.plist = NULL;
4339 h->needs_plt = 0;
4340 }
4341 }
4342 }
4343 else
4344 {
4345 h->plt.plist = NULL;
4346 h->needs_plt = 0;
4347 }
4348
4349 eh = (struct ppc_elf_link_hash_entry *) h;
4350 if (eh->elf.got.refcount > 0)
4351 {
4352 /* Make sure this symbol is output as a dynamic symbol. */
4353 if (eh->elf.dynindx == -1
4354 && !eh->elf.forced_local)
4355 {
4356 if (!bfd_elf_link_record_dynamic_symbol (info, &eh->elf))
4357 return FALSE;
4358 }
4359
4360 if (eh->tls_mask == (TLS_TLS | TLS_LD)
4361 && !eh->elf.def_dynamic)
4362 /* If just an LD reloc, we'll just use htab->tlsld_got.offset. */
4363 eh->elf.got.offset = (bfd_vma) -1;
4364 else
4365 {
4366 bfd_boolean dyn;
4367 unsigned int need = 0;
4368 if ((eh->tls_mask & TLS_TLS) != 0)
4369 {
4370 if ((eh->tls_mask & TLS_LD) != 0)
4371 need += 8;
4372 if ((eh->tls_mask & TLS_GD) != 0)
4373 need += 8;
4374 if ((eh->tls_mask & (TLS_TPREL | TLS_TPRELGD)) != 0)
4375 need += 4;
4376 if ((eh->tls_mask & TLS_DTPREL) != 0)
4377 need += 4;
4378 }
4379 else
4380 need += 4;
4381 eh->elf.got.offset = allocate_got (htab, need);
4382 dyn = htab->elf.dynamic_sections_created;
4383 if ((info->shared
4384 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, &eh->elf))
4385 && (ELF_ST_VISIBILITY (eh->elf.other) == STV_DEFAULT
4386 || eh->elf.root.type != bfd_link_hash_undefweak))
4387 {
4388 /* All the entries we allocated need relocs.
4389 Except LD only needs one. */
4390 if ((eh->tls_mask & TLS_LD) != 0)
4391 need -= 4;
4392 htab->relgot->size += need * (sizeof (Elf32_External_Rela) / 4);
4393 }
4394 }
4395 }
4396 else
4397 eh->elf.got.offset = (bfd_vma) -1;
4398
4399 if (eh->dyn_relocs == NULL)
4400 return TRUE;
4401
4402 /* In the shared -Bsymbolic case, discard space allocated for
4403 dynamic pc-relative relocs against symbols which turn out to be
4404 defined in regular objects. For the normal shared case, discard
4405 space for relocs that have become local due to symbol visibility
4406 changes. */
4407
4408 if (info->shared)
4409 {
4410 /* Relocs that use pc_count are those that appear on a call insn,
4411 or certain REL relocs (see MUST_BE_DYN_RELOC) that can be
4412 generated via assembly. We want calls to protected symbols to
4413 resolve directly to the function rather than going via the plt.
4414 If people want function pointer comparisons to work as expected
4415 then they should avoid writing weird assembly. */
4416 if (SYMBOL_CALLS_LOCAL (info, h))
4417 {
4418 struct ppc_elf_dyn_relocs **pp;
4419
4420 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
4421 {
4422 p->count -= p->pc_count;
4423 p->pc_count = 0;
4424 if (p->count == 0)
4425 *pp = p->next;
4426 else
4427 pp = &p->next;
4428 }
4429 }
4430
4431 /* Also discard relocs on undefined weak syms with non-default
4432 visibility. */
4433 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
4434 && h->root.type == bfd_link_hash_undefweak)
4435 eh->dyn_relocs = NULL;
4436
4437 /* Make sure undefined weak symbols are output as a dynamic symbol
4438 in PIEs. */
4439 if (info->pie
4440 && eh->dyn_relocs != NULL
4441 && h->dynindx == -1
4442 && h->root.type == bfd_link_hash_undefweak
4443 && !h->forced_local)
4444 {
4445 if (! bfd_elf_link_record_dynamic_symbol (info, h))
4446 return FALSE;
4447 }
4448 }
4449 else if (ELIMINATE_COPY_RELOCS)
4450 {
4451 /* For the non-shared case, discard space for relocs against
4452 symbols which turn out to need copy relocs or are not
4453 dynamic. */
4454
4455 if (!h->non_got_ref
4456 && h->def_dynamic
4457 && !h->def_regular)
4458 {
4459 /* Make sure this symbol is output as a dynamic symbol.
4460 Undefined weak syms won't yet be marked as dynamic. */
4461 if (h->dynindx == -1
4462 && !h->forced_local)
4463 {
4464 if (! bfd_elf_link_record_dynamic_symbol (info, h))
4465 return FALSE;
4466 }
4467
4468 /* If that succeeded, we know we'll be keeping all the
4469 relocs. */
4470 if (h->dynindx != -1)
4471 goto keep;
4472 }
4473
4474 eh->dyn_relocs = NULL;
4475
4476 keep: ;
4477 }
4478
4479 /* Finally, allocate space. */
4480 for (p = eh->dyn_relocs; p != NULL; p = p->next)
4481 {
4482 asection *sreloc = elf_section_data (p->sec)->sreloc;
4483 sreloc->size += p->count * sizeof (Elf32_External_Rela);
4484 }
4485
4486 return TRUE;
4487 }
4488
4489 /* Find any dynamic relocs that apply to read-only sections. */
4490
4491 static bfd_boolean
readonly_dynrelocs(struct elf_link_hash_entry * h,void * info)4492 readonly_dynrelocs (struct elf_link_hash_entry *h, void *info)
4493 {
4494 struct ppc_elf_dyn_relocs *p;
4495
4496 if (h->root.type == bfd_link_hash_indirect)
4497 return TRUE;
4498
4499 if (h->root.type == bfd_link_hash_warning)
4500 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4501
4502 for (p = ppc_elf_hash_entry (h)->dyn_relocs; p != NULL; p = p->next)
4503 {
4504 asection *s = p->sec->output_section;
4505
4506 if (s != NULL
4507 && ((s->flags & (SEC_READONLY | SEC_ALLOC))
4508 == (SEC_READONLY | SEC_ALLOC)))
4509 {
4510 ((struct bfd_link_info *) info)->flags |= DF_TEXTREL;
4511
4512 /* Not an error, just cut short the traversal. */
4513 return FALSE;
4514 }
4515 }
4516 return TRUE;
4517 }
4518
4519 /* Set the sizes of the dynamic sections. */
4520
4521 static bfd_boolean
ppc_elf_size_dynamic_sections(bfd * output_bfd ATTRIBUTE_UNUSED,struct bfd_link_info * info)4522 ppc_elf_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
4523 struct bfd_link_info *info)
4524 {
4525 struct ppc_elf_link_hash_table *htab;
4526 asection *s;
4527 bfd_boolean relocs;
4528 bfd *ibfd;
4529
4530 #ifdef DEBUG
4531 fprintf (stderr, "ppc_elf_size_dynamic_sections called\n");
4532 #endif
4533
4534 htab = ppc_elf_hash_table (info);
4535 BFD_ASSERT (htab->elf.dynobj != NULL);
4536
4537 if (elf_hash_table (info)->dynamic_sections_created)
4538 {
4539 /* Set the contents of the .interp section to the interpreter. */
4540 if (info->executable)
4541 {
4542 s = bfd_get_section_by_name (htab->elf.dynobj, ".interp");
4543 BFD_ASSERT (s != NULL);
4544 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
4545 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
4546 }
4547 }
4548
4549 if (htab->old_plt)
4550 htab->got_header_size = 16;
4551 else
4552 htab->got_header_size = 12;
4553
4554 /* Set up .got offsets for local syms, and space for local dynamic
4555 relocs. */
4556 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
4557 {
4558 bfd_signed_vma *local_got;
4559 bfd_signed_vma *end_local_got;
4560 char *lgot_masks;
4561 bfd_size_type locsymcount;
4562 Elf_Internal_Shdr *symtab_hdr;
4563
4564 if (!is_ppc_elf_target (ibfd->xvec))
4565 continue;
4566
4567 for (s = ibfd->sections; s != NULL; s = s->next)
4568 {
4569 struct ppc_elf_dyn_relocs *p;
4570
4571 for (p = ((struct ppc_elf_dyn_relocs *)
4572 elf_section_data (s)->local_dynrel);
4573 p != NULL;
4574 p = p->next)
4575 {
4576 if (!bfd_is_abs_section (p->sec)
4577 && bfd_is_abs_section (p->sec->output_section))
4578 {
4579 /* Input section has been discarded, either because
4580 it is a copy of a linkonce section or due to
4581 linker script /DISCARD/, so we'll be discarding
4582 the relocs too. */
4583 }
4584 else if (p->count != 0)
4585 {
4586 elf_section_data (p->sec)->sreloc->size
4587 += p->count * sizeof (Elf32_External_Rela);
4588 if ((p->sec->output_section->flags
4589 & (SEC_READONLY | SEC_ALLOC))
4590 == (SEC_READONLY | SEC_ALLOC))
4591 info->flags |= DF_TEXTREL;
4592 }
4593 }
4594 }
4595
4596 local_got = elf_local_got_refcounts (ibfd);
4597 if (!local_got)
4598 continue;
4599
4600 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
4601 locsymcount = symtab_hdr->sh_info;
4602 end_local_got = local_got + locsymcount;
4603 lgot_masks = (char *) end_local_got;
4604 for (; local_got < end_local_got; ++local_got, ++lgot_masks)
4605 if (*local_got > 0)
4606 {
4607 if (*lgot_masks == (TLS_TLS | TLS_LD))
4608 {
4609 /* If just an LD reloc, we'll just use
4610 htab->tlsld_got.offset. */
4611 htab->tlsld_got.refcount += 1;
4612 *local_got = (bfd_vma) -1;
4613 }
4614 else
4615 {
4616 unsigned int need = 0;
4617 if ((*lgot_masks & TLS_TLS) != 0)
4618 {
4619 if ((*lgot_masks & TLS_GD) != 0)
4620 need += 8;
4621 if ((*lgot_masks & (TLS_TPREL | TLS_TPRELGD)) != 0)
4622 need += 4;
4623 if ((*lgot_masks & TLS_DTPREL) != 0)
4624 need += 4;
4625 }
4626 else
4627 need += 4;
4628 *local_got = allocate_got (htab, need);
4629 if (info->shared)
4630 htab->relgot->size += (need
4631 * (sizeof (Elf32_External_Rela) / 4));
4632 }
4633 }
4634 else
4635 *local_got = (bfd_vma) -1;
4636 }
4637
4638 if (htab->tlsld_got.refcount > 0)
4639 {
4640 htab->tlsld_got.offset = allocate_got (htab, 8);
4641 if (info->shared)
4642 htab->relgot->size += sizeof (Elf32_External_Rela);
4643 }
4644 else
4645 htab->tlsld_got.offset = (bfd_vma) -1;
4646
4647 if (htab->is_vxworks)
4648 {
4649 /* Save the GOT and PLT symbols in the hash table for easy access.
4650 Mark them as having relocations; they might not, but we won't
4651 know for sure until we build the GOT in finish_dynamic_symbol. */
4652
4653 htab->hgot = elf_link_hash_lookup (elf_hash_table (info),
4654 "_GLOBAL_OFFSET_TABLE_",
4655 FALSE, FALSE, FALSE);
4656 if (htab->hgot)
4657 htab->hgot->indx = -2;
4658 htab->hplt = elf_link_hash_lookup (elf_hash_table (info),
4659 "_PROCEDURE_LINKAGE_TABLE_",
4660 FALSE, FALSE, FALSE);
4661 if (htab->hplt)
4662 htab->hplt->indx = -2;
4663 /* If the PLT is executable then give the symbol function type. */
4664 if (htab->hplt && htab->plt->flags & SEC_CODE)
4665 htab->hplt->type = STT_FUNC;
4666 }
4667
4668 /* Allocate space for global sym dynamic relocs. */
4669 elf_link_hash_traverse (elf_hash_table (info), allocate_dynrelocs, info);
4670
4671 if (htab->got != NULL && !htab->is_vxworks)
4672 {
4673 unsigned int g_o_t = 32768;
4674
4675 /* If we haven't allocated the header, do so now. */
4676 if (htab->got->size <= 32768)
4677 {
4678 g_o_t = htab->got->size;
4679 htab->got->size += htab->got_header_size;
4680 }
4681 if (htab->old_plt && !htab->is_vxworks)
4682 g_o_t += 4;
4683
4684 htab->elf.hgot->root.u.def.value = g_o_t;
4685 }
4686
4687 if (htab->glink != NULL && htab->glink->size != 0)
4688 {
4689 htab->glink_pltresolve = htab->glink->size;
4690 /* Space for the branch table. */
4691 htab->glink->size += htab->glink->size / (GLINK_ENTRY_SIZE / 4) - 4;
4692 /* Pad out to align the start of PLTresolve. */
4693 htab->glink->size += -htab->glink->size & 15;
4694 htab->glink->size += GLINK_PLTRESOLVE;
4695 }
4696
4697 /* We've now determined the sizes of the various dynamic sections.
4698 Allocate memory for them. */
4699 relocs = FALSE;
4700 for (s = htab->elf.dynobj->sections; s != NULL; s = s->next)
4701 {
4702 bfd_boolean strip_section = TRUE;
4703
4704 if ((s->flags & SEC_LINKER_CREATED) == 0)
4705 continue;
4706
4707 if (s == htab->plt
4708 || s == htab->glink
4709 || s == htab->got
4710 || s == htab->sgotplt
4711 || s == htab->sbss)
4712 {
4713 /* We'd like to strip these sections if they aren't needed, but if
4714 we've exported dynamic symbols from them we must leave them.
4715 It's too late to tell BFD to get rid of the symbols. */
4716 if ((s == htab->plt || s == htab->got) && htab->hplt != NULL)
4717 strip_section = FALSE;
4718 /* Strip this section if we don't need it; see the
4719 comment below. */
4720 }
4721 else if (s == htab->sdata[0].section
4722 || s == htab->sdata[1].section)
4723 {
4724 /* Strip these too. */
4725 }
4726 else if (strncmp (bfd_get_section_name (dynobj, s), ".rela", 5) == 0)
4727 {
4728 if (s->size == 0)
4729 {
4730 /* If we don't need this section, strip it from the
4731 output file. This is mostly to handle .rela.bss and
4732 .rela.plt. We must create both sections in
4733 create_dynamic_sections, because they must be created
4734 before the linker maps input sections to output
4735 sections. The linker does that before
4736 adjust_dynamic_symbol is called, and it is that
4737 function which decides whether anything needs to go
4738 into these sections. */
4739 }
4740 else
4741 {
4742 /* Remember whether there are any relocation sections. */
4743 relocs = TRUE;
4744
4745 /* We use the reloc_count field as a counter if we need
4746 to copy relocs into the output file. */
4747 s->reloc_count = 0;
4748 }
4749 }
4750 else
4751 {
4752 /* It's not one of our sections, so don't allocate space. */
4753 continue;
4754 }
4755
4756 if (s->size == 0 && strip_section)
4757 {
4758 s->flags |= SEC_EXCLUDE;
4759 continue;
4760 }
4761
4762 if ((s->flags & SEC_HAS_CONTENTS) == 0)
4763 continue;
4764
4765 /* Allocate memory for the section contents. */
4766 s->contents = bfd_zalloc (htab->elf.dynobj, s->size);
4767 if (s->contents == NULL)
4768 return FALSE;
4769 }
4770
4771 if (htab->elf.dynamic_sections_created)
4772 {
4773 /* Add some entries to the .dynamic section. We fill in the
4774 values later, in ppc_elf_finish_dynamic_sections, but we
4775 must add the entries now so that we get the correct size for
4776 the .dynamic section. The DT_DEBUG entry is filled in by the
4777 dynamic linker and used by the debugger. */
4778 #define add_dynamic_entry(TAG, VAL) \
4779 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
4780
4781 if (info->executable)
4782 {
4783 if (!add_dynamic_entry (DT_DEBUG, 0))
4784 return FALSE;
4785 }
4786
4787 if (htab->plt != NULL && htab->plt->size != 0)
4788 {
4789 if (!add_dynamic_entry (DT_PLTGOT, 0)
4790 || !add_dynamic_entry (DT_PLTRELSZ, 0)
4791 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
4792 || !add_dynamic_entry (DT_JMPREL, 0))
4793 return FALSE;
4794 }
4795
4796 if (htab->glink != NULL && htab->glink->size != 0)
4797 {
4798 if (!add_dynamic_entry (DT_PPC_GOT, 0))
4799 return FALSE;
4800 }
4801
4802 if (relocs)
4803 {
4804 if (!add_dynamic_entry (DT_RELA, 0)
4805 || !add_dynamic_entry (DT_RELASZ, 0)
4806 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
4807 return FALSE;
4808 }
4809
4810 /* If any dynamic relocs apply to a read-only section, then we
4811 need a DT_TEXTREL entry. */
4812 if ((info->flags & DF_TEXTREL) == 0)
4813 elf_link_hash_traverse (elf_hash_table (info), readonly_dynrelocs,
4814 info);
4815
4816 if ((info->flags & DF_TEXTREL) != 0)
4817 {
4818 if (!add_dynamic_entry (DT_TEXTREL, 0))
4819 return FALSE;
4820 }
4821 }
4822 #undef add_dynamic_entry
4823
4824 return TRUE;
4825 }
4826
4827 #define ARRAY_SIZE(a) (sizeof (a) / sizeof ((a)[0]))
4828
4829 static const int shared_stub_entry[] =
4830 {
4831 0x7c0802a6, /* mflr 0 */
4832 0x429f0005, /* bcl 20, 31, .Lxxx */
4833 0x7d6802a6, /* mflr 11 */
4834 0x3d6b0000, /* addis 11, 11, (xxx-.Lxxx)@ha */
4835 0x396b0018, /* addi 11, 11, (xxx-.Lxxx)@l */
4836 0x7c0803a6, /* mtlr 0 */
4837 0x7d6903a6, /* mtctr 11 */
4838 0x4e800420, /* bctr */
4839 };
4840
4841 static const int stub_entry[] =
4842 {
4843 0x3d600000, /* lis 11,xxx@ha */
4844 0x396b0000, /* addi 11,11,xxx@l */
4845 0x7d6903a6, /* mtctr 11 */
4846 0x4e800420, /* bctr */
4847 };
4848
4849 static bfd_boolean
ppc_elf_relax_section(bfd * abfd,asection * isec,struct bfd_link_info * link_info,bfd_boolean * again)4850 ppc_elf_relax_section (bfd *abfd,
4851 asection *isec,
4852 struct bfd_link_info *link_info,
4853 bfd_boolean *again)
4854 {
4855 struct one_fixup
4856 {
4857 struct one_fixup *next;
4858 asection *tsec;
4859 bfd_vma toff;
4860 bfd_vma trampoff;
4861 };
4862
4863 Elf_Internal_Shdr *symtab_hdr;
4864 bfd_byte *contents = NULL;
4865 Elf_Internal_Sym *isymbuf = NULL;
4866 Elf_Internal_Rela *internal_relocs = NULL;
4867 Elf_Internal_Rela *irel, *irelend;
4868 struct one_fixup *fixups = NULL;
4869 bfd_boolean changed;
4870 struct ppc_elf_link_hash_table *htab;
4871 bfd_size_type trampoff;
4872 asection *got2;
4873
4874 *again = FALSE;
4875
4876 /* Nothing to do if there are no relocations, and no need to do
4877 anything with non-alloc sections. */
4878 if ((isec->flags & SEC_ALLOC) == 0
4879 || (isec->flags & SEC_RELOC) == 0
4880 || isec->reloc_count == 0)
4881 return TRUE;
4882
4883 trampoff = (isec->size + 3) & (bfd_vma) -4;
4884 /* Space for a branch around any trampolines. */
4885 trampoff += 4;
4886
4887 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
4888
4889 /* Get a copy of the native relocations. */
4890 internal_relocs = _bfd_elf_link_read_relocs (abfd, isec, NULL, NULL,
4891 link_info->keep_memory);
4892 if (internal_relocs == NULL)
4893 goto error_return;
4894
4895 htab = ppc_elf_hash_table (link_info);
4896 got2 = bfd_get_section_by_name (abfd, ".got2");
4897
4898 irelend = internal_relocs + isec->reloc_count;
4899 for (irel = internal_relocs; irel < irelend; irel++)
4900 {
4901 unsigned long r_type = ELF32_R_TYPE (irel->r_info);
4902 bfd_vma symaddr, reladdr, toff, roff;
4903 asection *tsec;
4904 struct one_fixup *f;
4905 size_t insn_offset = 0;
4906 bfd_vma max_branch_offset, val;
4907 bfd_byte *hit_addr;
4908 unsigned long t0;
4909 unsigned char sym_type;
4910
4911 switch (r_type)
4912 {
4913 case R_PPC_REL24:
4914 case R_PPC_LOCAL24PC:
4915 case R_PPC_PLTREL24:
4916 max_branch_offset = 1 << 25;
4917 break;
4918
4919 case R_PPC_REL14:
4920 case R_PPC_REL14_BRTAKEN:
4921 case R_PPC_REL14_BRNTAKEN:
4922 max_branch_offset = 1 << 15;
4923 break;
4924
4925 default:
4926 continue;
4927 }
4928
4929 /* Get the value of the symbol referred to by the reloc. */
4930 if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info)
4931 {
4932 /* A local symbol. */
4933 Elf_Internal_Sym *isym;
4934
4935 /* Read this BFD's local symbols. */
4936 if (isymbuf == NULL)
4937 {
4938 isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
4939 if (isymbuf == NULL)
4940 isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr,
4941 symtab_hdr->sh_info, 0,
4942 NULL, NULL, NULL);
4943 if (isymbuf == 0)
4944 goto error_return;
4945 }
4946 isym = isymbuf + ELF32_R_SYM (irel->r_info);
4947 if (isym->st_shndx == SHN_UNDEF)
4948 continue; /* We can't do anything with undefined symbols. */
4949 else if (isym->st_shndx == SHN_ABS)
4950 tsec = bfd_abs_section_ptr;
4951 else if (isym->st_shndx == SHN_COMMON)
4952 tsec = bfd_com_section_ptr;
4953 else
4954 tsec = bfd_section_from_elf_index (abfd, isym->st_shndx);
4955
4956 toff = isym->st_value;
4957 sym_type = ELF_ST_TYPE (isym->st_info);
4958 }
4959 else
4960 {
4961 /* Global symbol handling. */
4962 unsigned long indx;
4963 struct elf_link_hash_entry *h;
4964
4965 indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info;
4966 h = elf_sym_hashes (abfd)[indx];
4967
4968 while (h->root.type == bfd_link_hash_indirect
4969 || h->root.type == bfd_link_hash_warning)
4970 h = (struct elf_link_hash_entry *) h->root.u.i.link;
4971
4972 tsec = NULL;
4973 toff = 0;
4974 if (r_type == R_PPC_PLTREL24
4975 && htab->plt != NULL)
4976 {
4977 struct plt_entry *ent = find_plt_ent (h, got2, irel->r_addend);
4978
4979 if (ent != NULL)
4980 {
4981 if (!htab->old_plt)
4982 {
4983 tsec = htab->glink;
4984 toff = ent->glink_offset;
4985 }
4986 else
4987 {
4988 tsec = htab->plt;
4989 toff = ent->plt.offset;
4990 }
4991 }
4992 }
4993 if (tsec != NULL)
4994 ;
4995 else if (h->root.type == bfd_link_hash_defined
4996 || h->root.type == bfd_link_hash_defweak)
4997 {
4998 tsec = h->root.u.def.section;
4999 toff = h->root.u.def.value;
5000 }
5001 else
5002 continue;
5003
5004 sym_type = h->type;
5005 }
5006
5007 /* If the branch and target are in the same section, you have
5008 no hope of adding stubs. We'll error out later should the
5009 branch overflow. */
5010 if (tsec == isec)
5011 continue;
5012
5013 /* There probably isn't any reason to handle symbols in
5014 SEC_MERGE sections; SEC_MERGE doesn't seem a likely
5015 attribute for a code section, and we are only looking at
5016 branches. However, implement it correctly here as a
5017 reference for other target relax_section functions. */
5018 if (0 && tsec->sec_info_type == ELF_INFO_TYPE_MERGE)
5019 {
5020 /* At this stage in linking, no SEC_MERGE symbol has been
5021 adjusted, so all references to such symbols need to be
5022 passed through _bfd_merged_section_offset. (Later, in
5023 relocate_section, all SEC_MERGE symbols *except* for
5024 section symbols have been adjusted.)
5025
5026 gas may reduce relocations against symbols in SEC_MERGE
5027 sections to a relocation against the section symbol when
5028 the original addend was zero. When the reloc is against
5029 a section symbol we should include the addend in the
5030 offset passed to _bfd_merged_section_offset, since the
5031 location of interest is the original symbol. On the
5032 other hand, an access to "sym+addend" where "sym" is not
5033 a section symbol should not include the addend; Such an
5034 access is presumed to be an offset from "sym"; The
5035 location of interest is just "sym". */
5036 if (sym_type == STT_SECTION)
5037 toff += irel->r_addend;
5038
5039 toff = _bfd_merged_section_offset (abfd, &tsec,
5040 elf_section_data (tsec)->sec_info,
5041 toff);
5042
5043 if (sym_type != STT_SECTION)
5044 toff += irel->r_addend;
5045 }
5046 /* PLTREL24 addends are special. */
5047 else if (r_type != R_PPC_PLTREL24)
5048 toff += irel->r_addend;
5049
5050 symaddr = tsec->output_section->vma + tsec->output_offset + toff;
5051
5052 roff = irel->r_offset;
5053 reladdr = isec->output_section->vma + isec->output_offset + roff;
5054
5055 /* If the branch is in range, no need to do anything. */
5056 if (symaddr - reladdr + max_branch_offset < 2 * max_branch_offset)
5057 continue;
5058
5059 /* Look for an existing fixup to this address. */
5060 for (f = fixups; f ; f = f->next)
5061 if (f->tsec == tsec && f->toff == toff)
5062 break;
5063
5064 if (f == NULL)
5065 {
5066 size_t size;
5067 unsigned long stub_rtype;
5068
5069 val = trampoff - roff;
5070 if (val >= max_branch_offset)
5071 /* Oh dear, we can't reach a trampoline. Don't try to add
5072 one. We'll report an error later. */
5073 continue;
5074
5075 if (link_info->shared)
5076 {
5077 size = 4 * ARRAY_SIZE (shared_stub_entry);
5078 insn_offset = 12;
5079 stub_rtype = R_PPC_RELAX32PC;
5080 }
5081 else
5082 {
5083 size = 4 * ARRAY_SIZE (stub_entry);
5084 insn_offset = 0;
5085 stub_rtype = R_PPC_RELAX32;
5086 }
5087
5088 if (R_PPC_RELAX32_PLT - R_PPC_RELAX32
5089 != R_PPC_RELAX32PC_PLT - R_PPC_RELAX32PC)
5090 abort ();
5091 if (tsec == htab->plt
5092 || tsec == htab->glink)
5093 stub_rtype += R_PPC_RELAX32_PLT - R_PPC_RELAX32;
5094
5095 /* Hijack the old relocation. Since we need two
5096 relocations for this use a "composite" reloc. */
5097 irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
5098 stub_rtype);
5099 irel->r_offset = trampoff + insn_offset;
5100
5101 /* Record the fixup so we don't do it again this section. */
5102 f = bfd_malloc (sizeof (*f));
5103 f->next = fixups;
5104 f->tsec = tsec;
5105 f->toff = toff;
5106 f->trampoff = trampoff;
5107 fixups = f;
5108
5109 trampoff += size;
5110 }
5111 else
5112 {
5113 val = f->trampoff - roff;
5114 if (val >= max_branch_offset)
5115 continue;
5116
5117 /* Nop out the reloc, since we're finalizing things here. */
5118 irel->r_info = ELF32_R_INFO (0, R_PPC_NONE);
5119 }
5120
5121 /* Get the section contents. */
5122 if (contents == NULL)
5123 {
5124 /* Get cached copy if it exists. */
5125 if (elf_section_data (isec)->this_hdr.contents != NULL)
5126 contents = elf_section_data (isec)->this_hdr.contents;
5127 else
5128 {
5129 /* Go get them off disk. */
5130 if (!bfd_malloc_and_get_section (abfd, isec, &contents))
5131 goto error_return;
5132 }
5133 }
5134
5135 /* Fix up the existing branch to hit the trampoline. */
5136 hit_addr = contents + roff;
5137 switch (r_type)
5138 {
5139 case R_PPC_REL24:
5140 case R_PPC_LOCAL24PC:
5141 case R_PPC_PLTREL24:
5142 t0 = bfd_get_32 (abfd, hit_addr);
5143 t0 &= ~0x3fffffc;
5144 t0 |= val & 0x3fffffc;
5145 bfd_put_32 (abfd, t0, hit_addr);
5146 break;
5147
5148 case R_PPC_REL14:
5149 case R_PPC_REL14_BRTAKEN:
5150 case R_PPC_REL14_BRNTAKEN:
5151 t0 = bfd_get_32 (abfd, hit_addr);
5152 t0 &= ~0xfffc;
5153 t0 |= val & 0xfffc;
5154 bfd_put_32 (abfd, t0, hit_addr);
5155 break;
5156 }
5157 }
5158
5159 /* Write out the trampolines. */
5160 changed = fixups != NULL;
5161 if (fixups != NULL)
5162 {
5163 const int *stub;
5164 bfd_byte *dest;
5165 bfd_vma val;
5166 int i, size;
5167
5168 do
5169 {
5170 struct one_fixup *f = fixups;
5171 fixups = fixups->next;
5172 free (f);
5173 }
5174 while (fixups);
5175
5176 contents = bfd_realloc (contents, trampoff);
5177 if (contents == NULL)
5178 goto error_return;
5179
5180 isec->size = (isec->size + 3) & (bfd_vma) -4;
5181 /* Branch around the trampolines. */
5182 val = trampoff - isec->size + 0x48000000;
5183 dest = contents + isec->size;
5184 isec->size = trampoff;
5185 bfd_put_32 (abfd, val, dest);
5186 dest += 4;
5187
5188 if (link_info->shared)
5189 {
5190 stub = shared_stub_entry;
5191 size = ARRAY_SIZE (shared_stub_entry);
5192 }
5193 else
5194 {
5195 stub = stub_entry;
5196 size = ARRAY_SIZE (stub_entry);
5197 }
5198
5199 i = 0;
5200 while (dest < contents + trampoff)
5201 {
5202 bfd_put_32 (abfd, stub[i], dest);
5203 i++;
5204 if (i == size)
5205 i = 0;
5206 dest += 4;
5207 }
5208 BFD_ASSERT (i == 0);
5209 }
5210
5211 if (isymbuf != NULL
5212 && symtab_hdr->contents != (unsigned char *) isymbuf)
5213 {
5214 if (! link_info->keep_memory)
5215 free (isymbuf);
5216 else
5217 {
5218 /* Cache the symbols for elf_link_input_bfd. */
5219 symtab_hdr->contents = (unsigned char *) isymbuf;
5220 }
5221 }
5222
5223 if (contents != NULL
5224 && elf_section_data (isec)->this_hdr.contents != contents)
5225 {
5226 if (!changed && !link_info->keep_memory)
5227 free (contents);
5228 else
5229 {
5230 /* Cache the section contents for elf_link_input_bfd. */
5231 elf_section_data (isec)->this_hdr.contents = contents;
5232 }
5233 }
5234
5235 if (elf_section_data (isec)->relocs != internal_relocs)
5236 {
5237 if (!changed)
5238 free (internal_relocs);
5239 else
5240 elf_section_data (isec)->relocs = internal_relocs;
5241 }
5242
5243 *again = changed;
5244 return TRUE;
5245
5246 error_return:
5247 if (isymbuf != NULL && (unsigned char *) isymbuf != symtab_hdr->contents)
5248 free (isymbuf);
5249 if (contents != NULL
5250 && elf_section_data (isec)->this_hdr.contents != contents)
5251 free (contents);
5252 if (internal_relocs != NULL
5253 && elf_section_data (isec)->relocs != internal_relocs)
5254 free (internal_relocs);
5255 return FALSE;
5256 }
5257
5258 /* Set _SDA_BASE_, _SDA2_BASE, and sbss start and end syms. They are
5259 set here rather than via PROVIDE in the default linker script,
5260 because using PROVIDE inside an output section statement results in
5261 unnecessary output sections. Using PROVIDE outside an output section
5262 statement runs the risk of section alignment affecting where the
5263 section starts. */
5264
5265 bfd_boolean
ppc_elf_set_sdata_syms(bfd * obfd,struct bfd_link_info * info)5266 ppc_elf_set_sdata_syms (bfd *obfd, struct bfd_link_info *info)
5267 {
5268 struct ppc_elf_link_hash_table *htab;
5269 unsigned i;
5270 asection *s;
5271 bfd_vma val;
5272
5273 htab = ppc_elf_hash_table (info);
5274
5275 for (i = 0; i < 2; i++)
5276 {
5277 elf_linker_section_t *lsect = &htab->sdata[i];
5278
5279 s = lsect->section;
5280 if (s != NULL)
5281 s = s->output_section;
5282 if (s == NULL)
5283 s = bfd_get_section_by_name (obfd, lsect->name);
5284 if (s == NULL)
5285 s = bfd_get_section_by_name (obfd, lsect->bss_name);
5286
5287 if (s)
5288 {
5289 /* VxWorks executables are relocatable, so the sdata base symbols
5290 must be section-relative. If the section is zero sized leave
5291 them as absolute symbols to avoid creationg an unused
5292 output section. */
5293 val = 32768;
5294 lsect->sym_val = val + s->vma;
5295 if (s->size == 0)
5296 {
5297 val += s->vma;
5298 s = NULL;
5299 }
5300 }
5301 else
5302 {
5303 val = 0;
5304 lsect->sym_val = 0;
5305 }
5306
5307 _bfd_elf_provide_symbol (info, lsect->sym_name, val, s);
5308 }
5309
5310 s = bfd_get_section_by_name (obfd, ".sbss");
5311 _bfd_elf_provide_symbol (info, "__sbss_start", 0, NULL);
5312 _bfd_elf_provide_symbol (info, "___sbss_start", 0, NULL);
5313 if (s != NULL)
5314 val = s->size;
5315 else
5316 val = 0;
5317 _bfd_elf_provide_symbol (info, "__sbss_end", val, s);
5318 _bfd_elf_provide_symbol (info, "___sbss_end", val, s);
5319 return TRUE;
5320 }
5321
5322 /* Fill in the address for a pointer generated in a linker section. */
5323
5324 static bfd_vma
elf_finish_pointer_linker_section(bfd * input_bfd,elf_linker_section_t * lsect,struct elf_link_hash_entry * h,bfd_vma relocation,const Elf_Internal_Rela * rel)5325 elf_finish_pointer_linker_section (bfd *input_bfd,
5326 elf_linker_section_t *lsect,
5327 struct elf_link_hash_entry *h,
5328 bfd_vma relocation,
5329 const Elf_Internal_Rela *rel)
5330 {
5331 elf_linker_section_pointers_t *linker_section_ptr;
5332
5333 BFD_ASSERT (lsect != NULL);
5334
5335 if (h != NULL)
5336 {
5337 /* Handle global symbol. */
5338 struct ppc_elf_link_hash_entry *eh;
5339
5340 eh = (struct ppc_elf_link_hash_entry *) h;
5341 BFD_ASSERT (eh->elf.def_regular);
5342 linker_section_ptr = eh->linker_section_pointer;
5343 }
5344 else
5345 {
5346 /* Handle local symbol. */
5347 unsigned long r_symndx = ELF32_R_SYM (rel->r_info);
5348
5349 BFD_ASSERT (elf_local_ptr_offsets (input_bfd) != NULL);
5350 linker_section_ptr = elf_local_ptr_offsets (input_bfd)[r_symndx];
5351 }
5352
5353 linker_section_ptr = elf_find_pointer_linker_section (linker_section_ptr,
5354 rel->r_addend,
5355 lsect);
5356 BFD_ASSERT (linker_section_ptr != NULL);
5357
5358 /* Offset will always be a multiple of four, so use the bottom bit
5359 as a "written" flag. */
5360 if ((linker_section_ptr->offset & 1) == 0)
5361 {
5362 bfd_put_32 (lsect->section->owner,
5363 relocation + linker_section_ptr->addend,
5364 lsect->section->contents + linker_section_ptr->offset);
5365 linker_section_ptr->offset += 1;
5366 }
5367
5368 relocation = (lsect->section->output_offset
5369 + linker_section_ptr->offset - 1
5370 - 0x8000);
5371
5372 #ifdef DEBUG
5373 fprintf (stderr,
5374 "Finish pointer in linker section %s, offset = %ld (0x%lx)\n",
5375 lsect->name, (long) relocation, (long) relocation);
5376 #endif
5377
5378 /* Subtract out the addend, because it will get added back in by the normal
5379 processing. */
5380 return relocation - linker_section_ptr->addend;
5381 }
5382
5383 /* The RELOCATE_SECTION function is called by the ELF backend linker
5384 to handle the relocations for a section.
5385
5386 The relocs are always passed as Rela structures; if the section
5387 actually uses Rel structures, the r_addend field will always be
5388 zero.
5389
5390 This function is responsible for adjust the section contents as
5391 necessary, and (if using Rela relocs and generating a
5392 relocatable output file) adjusting the reloc addend as
5393 necessary.
5394
5395 This function does not have to worry about setting the reloc
5396 address or the reloc symbol index.
5397
5398 LOCAL_SYMS is a pointer to the swapped in local symbols.
5399
5400 LOCAL_SECTIONS is an array giving the section in the input file
5401 corresponding to the st_shndx field of each local symbol.
5402
5403 The global hash table entry for the global symbols can be found
5404 via elf_sym_hashes (input_bfd).
5405
5406 When generating relocatable output, this function must handle
5407 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
5408 going to be the section symbol corresponding to the output
5409 section, which means that the addend must be adjusted
5410 accordingly. */
5411
5412 static bfd_boolean
ppc_elf_relocate_section(bfd * output_bfd,struct bfd_link_info * info,bfd * input_bfd,asection * input_section,bfd_byte * contents,Elf_Internal_Rela * relocs,Elf_Internal_Sym * local_syms,asection ** local_sections)5413 ppc_elf_relocate_section (bfd *output_bfd,
5414 struct bfd_link_info *info,
5415 bfd *input_bfd,
5416 asection *input_section,
5417 bfd_byte *contents,
5418 Elf_Internal_Rela *relocs,
5419 Elf_Internal_Sym *local_syms,
5420 asection **local_sections)
5421 {
5422 Elf_Internal_Shdr *symtab_hdr;
5423 struct elf_link_hash_entry **sym_hashes;
5424 struct ppc_elf_link_hash_table *htab;
5425 Elf_Internal_Rela *rel;
5426 Elf_Internal_Rela *relend;
5427 Elf_Internal_Rela outrel;
5428 bfd_byte *loc;
5429 asection *got2, *sreloc = NULL;
5430 bfd_vma *local_got_offsets;
5431 bfd_boolean ret = TRUE;
5432
5433 #ifdef DEBUG
5434 _bfd_error_handler ("ppc_elf_relocate_section called for %B section %A, "
5435 "%ld relocations%s",
5436 input_bfd, input_section,
5437 (long) input_section->reloc_count,
5438 (info->relocatable) ? " (relocatable)" : "");
5439 #endif
5440
5441 got2 = bfd_get_section_by_name (input_bfd, ".got2");
5442
5443 if (info->relocatable)
5444 {
5445 if (got2 == NULL)
5446 return TRUE;
5447
5448 rel = relocs;
5449 relend = relocs + input_section->reloc_count;
5450 for (; rel < relend; rel++)
5451 {
5452 enum elf_ppc_reloc_type r_type;
5453
5454 r_type = ELF32_R_TYPE (rel->r_info);
5455 if (r_type == R_PPC_PLTREL24
5456 && rel->r_addend >= 32768)
5457 {
5458 /* R_PPC_PLTREL24 is rather special. If non-zero, the
5459 addend specifies the GOT pointer offset within .got2. */
5460 rel->r_addend += got2->output_offset;
5461 }
5462 }
5463 return TRUE;
5464 }
5465
5466 /* Initialize howto table if not already done. */
5467 if (!ppc_elf_howto_table[R_PPC_ADDR32])
5468 ppc_elf_howto_init ();
5469
5470 htab = ppc_elf_hash_table (info);
5471 local_got_offsets = elf_local_got_offsets (input_bfd);
5472 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
5473 sym_hashes = elf_sym_hashes (input_bfd);
5474 rel = relocs;
5475 relend = relocs + input_section->reloc_count;
5476 for (; rel < relend; rel++)
5477 {
5478 enum elf_ppc_reloc_type r_type;
5479 bfd_vma addend;
5480 bfd_reloc_status_type r;
5481 Elf_Internal_Sym *sym;
5482 asection *sec;
5483 struct elf_link_hash_entry *h;
5484 const char *sym_name;
5485 reloc_howto_type *howto;
5486 unsigned long r_symndx;
5487 bfd_vma relocation;
5488 bfd_vma branch_bit, insn, from;
5489 bfd_boolean unresolved_reloc;
5490 bfd_boolean warned;
5491 unsigned int tls_type, tls_mask, tls_gd;
5492
5493 r_type = ELF32_R_TYPE (rel->r_info);
5494 sym = NULL;
5495 sec = NULL;
5496 h = NULL;
5497 unresolved_reloc = FALSE;
5498 warned = FALSE;
5499 r_symndx = ELF32_R_SYM (rel->r_info);
5500
5501 if (r_symndx < symtab_hdr->sh_info)
5502 {
5503 sym = local_syms + r_symndx;
5504 sec = local_sections[r_symndx];
5505 sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, sec);
5506
5507 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
5508 }
5509 else
5510 {
5511 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
5512 r_symndx, symtab_hdr, sym_hashes,
5513 h, sec, relocation,
5514 unresolved_reloc, warned);
5515
5516 sym_name = h->root.root.string;
5517 }
5518
5519 /* TLS optimizations. Replace instruction sequences and relocs
5520 based on information we collected in tls_optimize. We edit
5521 RELOCS so that --emit-relocs will output something sensible
5522 for the final instruction stream. */
5523 tls_mask = 0;
5524 tls_gd = 0;
5525 if (IS_PPC_TLS_RELOC (r_type))
5526 {
5527 if (h != NULL)
5528 tls_mask = ((struct ppc_elf_link_hash_entry *) h)->tls_mask;
5529 else if (local_got_offsets != NULL)
5530 {
5531 char *lgot_masks;
5532 lgot_masks = (char *) (local_got_offsets + symtab_hdr->sh_info);
5533 tls_mask = lgot_masks[r_symndx];
5534 }
5535 }
5536
5537 /* Ensure reloc mapping code below stays sane. */
5538 if ((R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TLSGD16 & 3)
5539 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TLSGD16_LO & 3)
5540 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TLSGD16_HI & 3)
5541 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TLSGD16_HA & 3)
5542 || (R_PPC_GOT_TLSLD16 & 3) != (R_PPC_GOT_TPREL16 & 3)
5543 || (R_PPC_GOT_TLSLD16_LO & 3) != (R_PPC_GOT_TPREL16_LO & 3)
5544 || (R_PPC_GOT_TLSLD16_HI & 3) != (R_PPC_GOT_TPREL16_HI & 3)
5545 || (R_PPC_GOT_TLSLD16_HA & 3) != (R_PPC_GOT_TPREL16_HA & 3))
5546 abort ();
5547 switch (r_type)
5548 {
5549 default:
5550 break;
5551
5552 case R_PPC_GOT_TPREL16:
5553 case R_PPC_GOT_TPREL16_LO:
5554 if (tls_mask != 0
5555 && (tls_mask & TLS_TPREL) == 0)
5556 {
5557 bfd_vma insn;
5558 insn = bfd_get_32 (output_bfd, contents + rel->r_offset - 2);
5559 insn &= 31 << 21;
5560 insn |= 0x3c020000; /* addis 0,2,0 */
5561 bfd_put_32 (output_bfd, insn, contents + rel->r_offset - 2);
5562 r_type = R_PPC_TPREL16_HA;
5563 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
5564 }
5565 break;
5566
5567 case R_PPC_TLS:
5568 if (tls_mask != 0
5569 && (tls_mask & TLS_TPREL) == 0)
5570 {
5571 bfd_vma insn, rtra;
5572 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
5573 if ((insn & ((31 << 26) | (31 << 11)))
5574 == ((31 << 26) | (2 << 11)))
5575 rtra = insn & ((1 << 26) - (1 << 16));
5576 else if ((insn & ((31 << 26) | (31 << 16)))
5577 == ((31 << 26) | (2 << 16)))
5578 rtra = (insn & (31 << 21)) | ((insn & (31 << 11)) << 5);
5579 else
5580 abort ();
5581 if ((insn & ((1 << 11) - (1 << 1))) == 266 << 1)
5582 /* add -> addi. */
5583 insn = 14 << 26;
5584 else if ((insn & (31 << 1)) == 23 << 1
5585 && ((insn & (31 << 6)) < 14 << 6
5586 || ((insn & (31 << 6)) >= 16 << 6
5587 && (insn & (31 << 6)) < 24 << 6)))
5588 /* load and store indexed -> dform. */
5589 insn = (32 | ((insn >> 6) & 31)) << 26;
5590 else if ((insn & (31 << 1)) == 21 << 1
5591 && (insn & (0x1a << 6)) == 0)
5592 /* ldx, ldux, stdx, stdux -> ld, ldu, std, stdu. */
5593 insn = (((58 | ((insn >> 6) & 4)) << 26)
5594 | ((insn >> 6) & 1));
5595 else if ((insn & (31 << 1)) == 21 << 1
5596 && (insn & ((1 << 11) - (1 << 1))) == 341 << 1)
5597 /* lwax -> lwa. */
5598 insn = (58 << 26) | 2;
5599 else
5600 abort ();
5601 insn |= rtra;
5602 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
5603 r_type = R_PPC_TPREL16_LO;
5604 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
5605 /* Was PPC_TLS which sits on insn boundary, now
5606 PPC_TPREL16_LO which is at insn+2. */
5607 rel->r_offset += 2;
5608 }
5609 break;
5610
5611 case R_PPC_GOT_TLSGD16_HI:
5612 case R_PPC_GOT_TLSGD16_HA:
5613 tls_gd = TLS_TPRELGD;
5614 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
5615 goto tls_gdld_hi;
5616 break;
5617
5618 case R_PPC_GOT_TLSLD16_HI:
5619 case R_PPC_GOT_TLSLD16_HA:
5620 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
5621 {
5622 tls_gdld_hi:
5623 if ((tls_mask & tls_gd) != 0)
5624 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3)
5625 + R_PPC_GOT_TPREL16);
5626 else
5627 {
5628 bfd_put_32 (output_bfd, NOP, contents + rel->r_offset);
5629 rel->r_offset -= 2;
5630 r_type = R_PPC_NONE;
5631 }
5632 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
5633 }
5634 break;
5635
5636 case R_PPC_GOT_TLSGD16:
5637 case R_PPC_GOT_TLSGD16_LO:
5638 tls_gd = TLS_TPRELGD;
5639 if (tls_mask != 0 && (tls_mask & TLS_GD) == 0)
5640 goto tls_get_addr_check;
5641 break;
5642
5643 case R_PPC_GOT_TLSLD16:
5644 case R_PPC_GOT_TLSLD16_LO:
5645 if (tls_mask != 0 && (tls_mask & TLS_LD) == 0)
5646 {
5647 tls_get_addr_check:
5648 if (rel + 1 < relend)
5649 {
5650 enum elf_ppc_reloc_type r_type2;
5651 unsigned long r_symndx2;
5652 struct elf_link_hash_entry *h2;
5653 bfd_vma insn1, insn2;
5654 bfd_vma offset;
5655
5656 /* The next instruction should be a call to
5657 __tls_get_addr. Peek at the reloc to be sure. */
5658 r_type2 = ELF32_R_TYPE (rel[1].r_info);
5659 r_symndx2 = ELF32_R_SYM (rel[1].r_info);
5660 if (r_symndx2 < symtab_hdr->sh_info
5661 || (r_type2 != R_PPC_REL14
5662 && r_type2 != R_PPC_REL14_BRTAKEN
5663 && r_type2 != R_PPC_REL14_BRNTAKEN
5664 && r_type2 != R_PPC_REL24
5665 && r_type2 != R_PPC_PLTREL24))
5666 break;
5667
5668 h2 = sym_hashes[r_symndx2 - symtab_hdr->sh_info];
5669 while (h2->root.type == bfd_link_hash_indirect
5670 || h2->root.type == bfd_link_hash_warning)
5671 h2 = (struct elf_link_hash_entry *) h2->root.u.i.link;
5672 if (h2 == NULL || h2 != htab->tls_get_addr)
5673 break;
5674
5675 /* OK, it checks out. Replace the call. */
5676 offset = rel[1].r_offset;
5677 insn1 = bfd_get_32 (output_bfd,
5678 contents + rel->r_offset - 2);
5679 if ((tls_mask & tls_gd) != 0)
5680 {
5681 /* IE */
5682 insn1 &= (1 << 26) - 1;
5683 insn1 |= 32 << 26; /* lwz */
5684 insn2 = 0x7c631214; /* add 3,3,2 */
5685 rel[1].r_info = ELF32_R_INFO (r_symndx2, R_PPC_NONE);
5686 r_type = (((r_type - (R_PPC_GOT_TLSGD16 & 3)) & 3)
5687 + R_PPC_GOT_TPREL16);
5688 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
5689 }
5690 else
5691 {
5692 /* LE */
5693 insn1 = 0x3c620000; /* addis 3,2,0 */
5694 insn2 = 0x38630000; /* addi 3,3,0 */
5695 if (tls_gd == 0)
5696 {
5697 /* Was an LD reloc. */
5698 r_symndx = 0;
5699 rel->r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
5700 rel[1].r_addend = htab->elf.tls_sec->vma + DTP_OFFSET;
5701 }
5702 r_type = R_PPC_TPREL16_HA;
5703 rel->r_info = ELF32_R_INFO (r_symndx, r_type);
5704 rel[1].r_info = ELF32_R_INFO (r_symndx,
5705 R_PPC_TPREL16_LO);
5706 rel[1].r_offset += 2;
5707 }
5708 bfd_put_32 (output_bfd, insn1, contents + rel->r_offset - 2);
5709 bfd_put_32 (output_bfd, insn2, contents + offset);
5710 if (tls_gd == 0)
5711 {
5712 /* We changed the symbol on an LD reloc. Start over
5713 in order to get h, sym, sec etc. right. */
5714 rel--;
5715 continue;
5716 }
5717 }
5718 }
5719 break;
5720 }
5721
5722 /* Handle other relocations that tweak non-addend part of insn. */
5723 branch_bit = 0;
5724 switch (r_type)
5725 {
5726 default:
5727 break;
5728
5729 /* Branch taken prediction relocations. */
5730 case R_PPC_ADDR14_BRTAKEN:
5731 case R_PPC_REL14_BRTAKEN:
5732 branch_bit = BRANCH_PREDICT_BIT;
5733 /* Fall thru */
5734
5735 /* Branch not taken prediction relocations. */
5736 case R_PPC_ADDR14_BRNTAKEN:
5737 case R_PPC_REL14_BRNTAKEN:
5738 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
5739 insn &= ~BRANCH_PREDICT_BIT;
5740 insn |= branch_bit;
5741
5742 from = (rel->r_offset
5743 + input_section->output_offset
5744 + input_section->output_section->vma);
5745
5746 /* Invert 'y' bit if not the default. */
5747 if ((bfd_signed_vma) (relocation + rel->r_addend - from) < 0)
5748 insn ^= BRANCH_PREDICT_BIT;
5749
5750 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
5751 break;
5752 }
5753
5754 addend = rel->r_addend;
5755 tls_type = 0;
5756 howto = NULL;
5757 if (r_type < R_PPC_max)
5758 howto = ppc_elf_howto_table[r_type];
5759 switch (r_type)
5760 {
5761 default:
5762 (*_bfd_error_handler)
5763 (_("%B: unknown relocation type %d for symbol %s"),
5764 input_bfd, (int) r_type, sym_name);
5765
5766 bfd_set_error (bfd_error_bad_value);
5767 ret = FALSE;
5768 continue;
5769
5770 case R_PPC_NONE:
5771 case R_PPC_TLS:
5772 case R_PPC_EMB_MRKREF:
5773 case R_PPC_GNU_VTINHERIT:
5774 case R_PPC_GNU_VTENTRY:
5775 continue;
5776
5777 /* GOT16 relocations. Like an ADDR16 using the symbol's
5778 address in the GOT as relocation value instead of the
5779 symbol's value itself. Also, create a GOT entry for the
5780 symbol and put the symbol value there. */
5781 case R_PPC_GOT_TLSGD16:
5782 case R_PPC_GOT_TLSGD16_LO:
5783 case R_PPC_GOT_TLSGD16_HI:
5784 case R_PPC_GOT_TLSGD16_HA:
5785 tls_type = TLS_TLS | TLS_GD;
5786 goto dogot;
5787
5788 case R_PPC_GOT_TLSLD16:
5789 case R_PPC_GOT_TLSLD16_LO:
5790 case R_PPC_GOT_TLSLD16_HI:
5791 case R_PPC_GOT_TLSLD16_HA:
5792 tls_type = TLS_TLS | TLS_LD;
5793 goto dogot;
5794
5795 case R_PPC_GOT_TPREL16:
5796 case R_PPC_GOT_TPREL16_LO:
5797 case R_PPC_GOT_TPREL16_HI:
5798 case R_PPC_GOT_TPREL16_HA:
5799 tls_type = TLS_TLS | TLS_TPREL;
5800 goto dogot;
5801
5802 case R_PPC_GOT_DTPREL16:
5803 case R_PPC_GOT_DTPREL16_LO:
5804 case R_PPC_GOT_DTPREL16_HI:
5805 case R_PPC_GOT_DTPREL16_HA:
5806 tls_type = TLS_TLS | TLS_DTPREL;
5807 goto dogot;
5808
5809 case R_PPC_GOT16:
5810 case R_PPC_GOT16_LO:
5811 case R_PPC_GOT16_HI:
5812 case R_PPC_GOT16_HA:
5813 dogot:
5814 {
5815 /* Relocation is to the entry for this symbol in the global
5816 offset table. */
5817 bfd_vma off;
5818 bfd_vma *offp;
5819 unsigned long indx;
5820
5821 if (htab->got == NULL)
5822 abort ();
5823
5824 indx = 0;
5825 if (tls_type == (TLS_TLS | TLS_LD)
5826 && (h == NULL
5827 || !h->def_dynamic))
5828 offp = &htab->tlsld_got.offset;
5829 else if (h != NULL)
5830 {
5831 bfd_boolean dyn;
5832 dyn = htab->elf.dynamic_sections_created;
5833 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
5834 || (info->shared
5835 && SYMBOL_REFERENCES_LOCAL (info, h)))
5836 /* This is actually a static link, or it is a
5837 -Bsymbolic link and the symbol is defined
5838 locally, or the symbol was forced to be local
5839 because of a version file. */
5840 ;
5841 else
5842 {
5843 indx = h->dynindx;
5844 unresolved_reloc = FALSE;
5845 }
5846 offp = &h->got.offset;
5847 }
5848 else
5849 {
5850 if (local_got_offsets == NULL)
5851 abort ();
5852 offp = &local_got_offsets[r_symndx];
5853 }
5854
5855 /* The offset must always be a multiple of 4. We use the
5856 least significant bit to record whether we have already
5857 processed this entry. */
5858 off = *offp;
5859 if ((off & 1) != 0)
5860 off &= ~1;
5861 else
5862 {
5863 unsigned int tls_m = (tls_mask
5864 & (TLS_LD | TLS_GD | TLS_DTPREL
5865 | TLS_TPREL | TLS_TPRELGD));
5866
5867 if (offp == &htab->tlsld_got.offset)
5868 tls_m = TLS_LD;
5869 else if (h == NULL
5870 || !h->def_dynamic)
5871 tls_m &= ~TLS_LD;
5872
5873 /* We might have multiple got entries for this sym.
5874 Initialize them all. */
5875 do
5876 {
5877 int tls_ty = 0;
5878
5879 if ((tls_m & TLS_LD) != 0)
5880 {
5881 tls_ty = TLS_TLS | TLS_LD;
5882 tls_m &= ~TLS_LD;
5883 }
5884 else if ((tls_m & TLS_GD) != 0)
5885 {
5886 tls_ty = TLS_TLS | TLS_GD;
5887 tls_m &= ~TLS_GD;
5888 }
5889 else if ((tls_m & TLS_DTPREL) != 0)
5890 {
5891 tls_ty = TLS_TLS | TLS_DTPREL;
5892 tls_m &= ~TLS_DTPREL;
5893 }
5894 else if ((tls_m & (TLS_TPREL | TLS_TPRELGD)) != 0)
5895 {
5896 tls_ty = TLS_TLS | TLS_TPREL;
5897 tls_m = 0;
5898 }
5899
5900 /* Generate relocs for the dynamic linker. */
5901 if ((info->shared || indx != 0)
5902 && (h == NULL
5903 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
5904 || h->root.type != bfd_link_hash_undefweak))
5905 {
5906 outrel.r_offset = (htab->got->output_section->vma
5907 + htab->got->output_offset
5908 + off);
5909 outrel.r_addend = 0;
5910 if (tls_ty & (TLS_LD | TLS_GD))
5911 {
5912 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPMOD32);
5913 if (tls_ty == (TLS_TLS | TLS_GD))
5914 {
5915 loc = htab->relgot->contents;
5916 loc += (htab->relgot->reloc_count++
5917 * sizeof (Elf32_External_Rela));
5918 bfd_elf32_swap_reloca_out (output_bfd,
5919 &outrel, loc);
5920 outrel.r_offset += 4;
5921 outrel.r_info
5922 = ELF32_R_INFO (indx, R_PPC_DTPREL32);
5923 }
5924 }
5925 else if (tls_ty == (TLS_TLS | TLS_DTPREL))
5926 outrel.r_info = ELF32_R_INFO (indx, R_PPC_DTPREL32);
5927 else if (tls_ty == (TLS_TLS | TLS_TPREL))
5928 outrel.r_info = ELF32_R_INFO (indx, R_PPC_TPREL32);
5929 else if (indx == 0)
5930 outrel.r_info = ELF32_R_INFO (indx, R_PPC_RELATIVE);
5931 else
5932 outrel.r_info = ELF32_R_INFO (indx, R_PPC_GLOB_DAT);
5933 if (indx == 0)
5934 {
5935 outrel.r_addend += relocation;
5936 if (tls_ty & (TLS_GD | TLS_DTPREL | TLS_TPREL))
5937 outrel.r_addend -= htab->elf.tls_sec->vma;
5938 }
5939 loc = htab->relgot->contents;
5940 loc += (htab->relgot->reloc_count++
5941 * sizeof (Elf32_External_Rela));
5942 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
5943 }
5944
5945 /* Init the .got section contents if we're not
5946 emitting a reloc. */
5947 else
5948 {
5949 bfd_vma value = relocation;
5950
5951 if (tls_ty == (TLS_TLS | TLS_LD))
5952 value = 1;
5953 else if (tls_ty != 0)
5954 {
5955 value -= htab->elf.tls_sec->vma + DTP_OFFSET;
5956 if (tls_ty == (TLS_TLS | TLS_TPREL))
5957 value += DTP_OFFSET - TP_OFFSET;
5958
5959 if (tls_ty == (TLS_TLS | TLS_GD))
5960 {
5961 bfd_put_32 (output_bfd, value,
5962 htab->got->contents + off + 4);
5963 value = 1;
5964 }
5965 }
5966 bfd_put_32 (output_bfd, value,
5967 htab->got->contents + off);
5968 }
5969
5970 off += 4;
5971 if (tls_ty & (TLS_LD | TLS_GD))
5972 off += 4;
5973 }
5974 while (tls_m != 0);
5975
5976 off = *offp;
5977 *offp = off | 1;
5978 }
5979
5980 if (off >= (bfd_vma) -2)
5981 abort ();
5982
5983 if ((tls_type & TLS_TLS) != 0)
5984 {
5985 if (tls_type != (TLS_TLS | TLS_LD))
5986 {
5987 if ((tls_mask & TLS_LD) != 0
5988 && !(h == NULL
5989 || !h->def_dynamic))
5990 off += 8;
5991 if (tls_type != (TLS_TLS | TLS_GD))
5992 {
5993 if ((tls_mask & TLS_GD) != 0)
5994 off += 8;
5995 if (tls_type != (TLS_TLS | TLS_DTPREL))
5996 {
5997 if ((tls_mask & TLS_DTPREL) != 0)
5998 off += 4;
5999 }
6000 }
6001 }
6002 }
6003
6004 relocation = htab->got->output_offset + off;
6005 relocation -= htab->elf.hgot->root.u.def.value;
6006
6007 /* Addends on got relocations don't make much sense.
6008 x+off@got is actually x@got+off, and since the got is
6009 generated by a hash table traversal, the value in the
6010 got at entry m+n bears little relation to the entry m. */
6011 if (addend != 0)
6012 (*_bfd_error_handler)
6013 (_("%B(%A+0x%lx): non-zero addend on %s reloc against `%s'"),
6014 input_bfd,
6015 input_section,
6016 (long) rel->r_offset,
6017 howto->name,
6018 sym_name);
6019 }
6020 break;
6021
6022 /* Relocations that need no special processing. */
6023 case R_PPC_LOCAL24PC:
6024 /* It makes no sense to point a local relocation
6025 at a symbol not in this object. */
6026 if (unresolved_reloc)
6027 {
6028 if (! (*info->callbacks->undefined_symbol) (info,
6029 h->root.root.string,
6030 input_bfd,
6031 input_section,
6032 rel->r_offset,
6033 TRUE))
6034 return FALSE;
6035 continue;
6036 }
6037 break;
6038
6039 case R_PPC_DTPREL16:
6040 case R_PPC_DTPREL16_LO:
6041 case R_PPC_DTPREL16_HI:
6042 case R_PPC_DTPREL16_HA:
6043 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
6044 break;
6045
6046 /* Relocations that may need to be propagated if this is a shared
6047 object. */
6048 case R_PPC_TPREL16:
6049 case R_PPC_TPREL16_LO:
6050 case R_PPC_TPREL16_HI:
6051 case R_PPC_TPREL16_HA:
6052 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
6053 /* The TPREL16 relocs shouldn't really be used in shared
6054 libs as they will result in DT_TEXTREL being set, but
6055 support them anyway. */
6056 goto dodyn;
6057
6058 case R_PPC_TPREL32:
6059 addend -= htab->elf.tls_sec->vma + TP_OFFSET;
6060 goto dodyn;
6061
6062 case R_PPC_DTPREL32:
6063 addend -= htab->elf.tls_sec->vma + DTP_OFFSET;
6064 goto dodyn;
6065
6066 case R_PPC_DTPMOD32:
6067 relocation = 1;
6068 addend = 0;
6069 goto dodyn;
6070
6071 case R_PPC_REL16:
6072 case R_PPC_REL16_LO:
6073 case R_PPC_REL16_HI:
6074 case R_PPC_REL16_HA:
6075 break;
6076
6077 case R_PPC_REL24:
6078 case R_PPC_REL32:
6079 case R_PPC_REL14:
6080 case R_PPC_REL14_BRTAKEN:
6081 case R_PPC_REL14_BRNTAKEN:
6082 /* If these relocations are not to a named symbol, they can be
6083 handled right here, no need to bother the dynamic linker. */
6084 if (SYMBOL_REFERENCES_LOCAL (info, h)
6085 || h == htab->elf.hgot)
6086 break;
6087 /* fall through */
6088
6089 /* Relocations that always need to be propagated if this is a shared
6090 object. */
6091 case R_PPC_ADDR32:
6092 case R_PPC_ADDR24:
6093 case R_PPC_ADDR16:
6094 case R_PPC_ADDR16_LO:
6095 case R_PPC_ADDR16_HI:
6096 case R_PPC_ADDR16_HA:
6097 case R_PPC_ADDR14:
6098 case R_PPC_ADDR14_BRTAKEN:
6099 case R_PPC_ADDR14_BRNTAKEN:
6100 case R_PPC_UADDR32:
6101 case R_PPC_UADDR16:
6102 /* r_symndx will be zero only for relocs against symbols
6103 from removed linkonce sections, or sections discarded by
6104 a linker script. */
6105 dodyn:
6106 if (r_symndx == 0)
6107 break;
6108 /* Fall thru. */
6109
6110 if ((input_section->flags & SEC_ALLOC) == 0)
6111 break;
6112 /* Fall thru. */
6113
6114 if ((info->shared
6115 && (h == NULL
6116 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
6117 || h->root.type != bfd_link_hash_undefweak)
6118 && (MUST_BE_DYN_RELOC (r_type)
6119 || !SYMBOL_CALLS_LOCAL (info, h)))
6120 || (ELIMINATE_COPY_RELOCS
6121 && !info->shared
6122 && h != NULL
6123 && h->dynindx != -1
6124 && !h->non_got_ref
6125 && h->def_dynamic
6126 && !h->def_regular))
6127 {
6128 int skip;
6129
6130 #ifdef DEBUG
6131 fprintf (stderr, "ppc_elf_relocate_section needs to "
6132 "create relocation for %s\n",
6133 (h && h->root.root.string
6134 ? h->root.root.string : "<unknown>"));
6135 #endif
6136
6137 /* When generating a shared object, these relocations
6138 are copied into the output file to be resolved at run
6139 time. */
6140 if (sreloc == NULL)
6141 {
6142 const char *name;
6143
6144 name = (bfd_elf_string_from_elf_section
6145 (input_bfd,
6146 elf_elfheader (input_bfd)->e_shstrndx,
6147 elf_section_data (input_section)->rel_hdr.sh_name));
6148 if (name == NULL)
6149 return FALSE;
6150
6151 BFD_ASSERT (strncmp (name, ".rela", 5) == 0
6152 && strcmp (bfd_get_section_name (input_bfd,
6153 input_section),
6154 name + 5) == 0);
6155
6156 sreloc = bfd_get_section_by_name (htab->elf.dynobj, name);
6157 BFD_ASSERT (sreloc != NULL);
6158 }
6159
6160 skip = 0;
6161
6162 outrel.r_offset =
6163 _bfd_elf_section_offset (output_bfd, info, input_section,
6164 rel->r_offset);
6165 if (outrel.r_offset == (bfd_vma) -1
6166 || outrel.r_offset == (bfd_vma) -2)
6167 skip = (int) outrel.r_offset;
6168 outrel.r_offset += (input_section->output_section->vma
6169 + input_section->output_offset);
6170
6171 if (skip)
6172 memset (&outrel, 0, sizeof outrel);
6173 else if (!SYMBOL_REFERENCES_LOCAL (info, h))
6174 {
6175 unresolved_reloc = FALSE;
6176 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
6177 outrel.r_addend = rel->r_addend;
6178 }
6179 else
6180 {
6181 outrel.r_addend = relocation + rel->r_addend;
6182
6183 if (r_type == R_PPC_ADDR32)
6184 outrel.r_info = ELF32_R_INFO (0, R_PPC_RELATIVE);
6185 else
6186 {
6187 long indx;
6188
6189 if (bfd_is_abs_section (sec))
6190 indx = 0;
6191 else if (sec == NULL || sec->owner == NULL)
6192 {
6193 bfd_set_error (bfd_error_bad_value);
6194 return FALSE;
6195 }
6196 else
6197 {
6198 asection *osec;
6199
6200 /* We are turning this relocation into one
6201 against a section symbol. It would be
6202 proper to subtract the symbol's value,
6203 osec->vma, from the emitted reloc addend,
6204 but ld.so expects buggy relocs. */
6205 osec = sec->output_section;
6206 indx = elf_section_data (osec)->dynindx;
6207 BFD_ASSERT (indx > 0);
6208 #ifdef DEBUG
6209 if (indx <= 0)
6210 printf ("indx=%d section=%s flags=%08x name=%s\n",
6211 indx, osec->name, osec->flags,
6212 h->root.root.string);
6213 #endif
6214 }
6215
6216 outrel.r_info = ELF32_R_INFO (indx, r_type);
6217 }
6218 }
6219
6220 loc = sreloc->contents;
6221 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
6222 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
6223
6224 if (skip == -1)
6225 continue;
6226
6227 /* This reloc will be computed at runtime. We clear the memory
6228 so that it contains predictable value. */
6229 if (! skip
6230 && ((input_section->flags & SEC_ALLOC) != 0
6231 || ELF32_R_TYPE (outrel.r_info) != R_PPC_RELATIVE))
6232 {
6233 relocation = howto->pc_relative ? outrel.r_offset : 0;
6234 addend = 0;
6235 break;
6236 }
6237 }
6238 break;
6239
6240 case R_PPC_RELAX32PC_PLT:
6241 case R_PPC_RELAX32_PLT:
6242 {
6243 struct plt_entry *ent = find_plt_ent (h, got2, addend);
6244
6245 if (!htab->old_plt)
6246 relocation = (htab->glink->output_section->vma
6247 + htab->glink->output_offset
6248 + ent->glink_offset);
6249 else
6250 relocation = (htab->plt->output_section->vma
6251 + htab->plt->output_offset
6252 + ent->plt.offset);
6253 addend = 0;
6254 }
6255 if (r_type == R_PPC_RELAX32_PLT)
6256 goto relax32;
6257 /* Fall thru */
6258
6259 case R_PPC_RELAX32PC:
6260 relocation -= (input_section->output_section->vma
6261 + input_section->output_offset
6262 + rel->r_offset - 4);
6263 /* Fall thru */
6264
6265 case R_PPC_RELAX32:
6266 relax32:
6267 {
6268 unsigned long t0;
6269 unsigned long t1;
6270
6271 t0 = bfd_get_32 (output_bfd, contents + rel->r_offset);
6272 t1 = bfd_get_32 (output_bfd, contents + rel->r_offset + 4);
6273
6274 /* We're clearing the bits for R_PPC_ADDR16_HA
6275 and R_PPC_ADDR16_LO here. */
6276 t0 &= ~0xffff;
6277 t1 &= ~0xffff;
6278
6279 /* t0 is HA, t1 is LO */
6280 relocation += addend;
6281 t0 |= ((relocation + 0x8000) >> 16) & 0xffff;
6282 t1 |= relocation & 0xffff;
6283
6284 bfd_put_32 (output_bfd, t0, contents + rel->r_offset);
6285 bfd_put_32 (output_bfd, t1, contents + rel->r_offset + 4);
6286 }
6287 continue;
6288
6289 /* Indirect .sdata relocation. */
6290 case R_PPC_EMB_SDAI16:
6291 BFD_ASSERT (htab->sdata[0].section != NULL);
6292 relocation
6293 = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[0],
6294 h, relocation, rel);
6295 break;
6296
6297 /* Indirect .sdata2 relocation. */
6298 case R_PPC_EMB_SDA2I16:
6299 BFD_ASSERT (htab->sdata[1].section != NULL);
6300 relocation
6301 = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[1],
6302 h, relocation, rel);
6303 break;
6304
6305 /* Handle the TOC16 reloc. We want to use the offset within the .got
6306 section, not the actual VMA. This is appropriate when generating
6307 an embedded ELF object, for which the .got section acts like the
6308 AIX .toc section. */
6309 case R_PPC_TOC16: /* phony GOT16 relocations */
6310 BFD_ASSERT (sec != NULL);
6311 BFD_ASSERT (bfd_is_und_section (sec)
6312 || strcmp (bfd_get_section_name (abfd, sec), ".got") == 0
6313 || strcmp (bfd_get_section_name (abfd, sec), ".cgot") == 0);
6314
6315 addend -= sec->output_section->vma + sec->output_offset + 0x8000;
6316 break;
6317
6318 case R_PPC_PLTREL24:
6319 /* Relocation is to the entry for this symbol in the
6320 procedure linkage table. */
6321 {
6322 struct plt_entry *ent = find_plt_ent (h, got2, addend);
6323
6324 addend = 0;
6325 if (ent == NULL
6326 || htab->plt == NULL)
6327 {
6328 /* We didn't make a PLT entry for this symbol. This
6329 happens when statically linking PIC code, or when
6330 using -Bsymbolic. */
6331 break;
6332 }
6333
6334 unresolved_reloc = FALSE;
6335 if (!htab->old_plt)
6336 relocation = (htab->glink->output_section->vma
6337 + htab->glink->output_offset
6338 + ent->glink_offset);
6339 else
6340 relocation = (htab->plt->output_section->vma
6341 + htab->plt->output_offset
6342 + ent->plt.offset);
6343 }
6344 break;
6345
6346 /* Relocate against _SDA_BASE_. */
6347 case R_PPC_SDAREL16:
6348 {
6349 const char *name;
6350
6351 BFD_ASSERT (sec != NULL);
6352 name = bfd_get_section_name (abfd, sec->output_section);
6353 if (! ((strncmp (name, ".sdata", 6) == 0
6354 && (name[6] == 0 || name[6] == '.'))
6355 || (strncmp (name, ".sbss", 5) == 0
6356 && (name[5] == 0 || name[5] == '.'))))
6357 {
6358 (*_bfd_error_handler)
6359 (_("%B: the target (%s) of a %s relocation is "
6360 "in the wrong output section (%s)"),
6361 input_bfd,
6362 sym_name,
6363 howto->name,
6364 name);
6365 }
6366 addend -= htab->sdata[0].sym_val;
6367 }
6368 break;
6369
6370 /* Relocate against _SDA2_BASE_. */
6371 case R_PPC_EMB_SDA2REL:
6372 {
6373 const char *name;
6374
6375 BFD_ASSERT (sec != NULL);
6376 name = bfd_get_section_name (abfd, sec->output_section);
6377 if (! (strncmp (name, ".sdata2", 7) == 0
6378 || strncmp (name, ".sbss2", 6) == 0))
6379 {
6380 (*_bfd_error_handler)
6381 (_("%B: the target (%s) of a %s relocation is "
6382 "in the wrong output section (%s)"),
6383 input_bfd,
6384 sym_name,
6385 howto->name,
6386 name);
6387
6388 bfd_set_error (bfd_error_bad_value);
6389 ret = FALSE;
6390 continue;
6391 }
6392 addend -= htab->sdata[1].sym_val;
6393 }
6394 break;
6395
6396 /* Relocate against either _SDA_BASE_, _SDA2_BASE_, or 0. */
6397 case R_PPC_EMB_SDA21:
6398 case R_PPC_EMB_RELSDA:
6399 {
6400 const char *name;
6401 int reg;
6402
6403 BFD_ASSERT (sec != NULL);
6404 name = bfd_get_section_name (abfd, sec->output_section);
6405 if (((strncmp (name, ".sdata", 6) == 0
6406 && (name[6] == 0 || name[6] == '.'))
6407 || (strncmp (name, ".sbss", 5) == 0
6408 && (name[5] == 0 || name[5] == '.'))))
6409 {
6410 reg = 13;
6411 addend -= htab->sdata[0].sym_val;
6412 }
6413
6414 else if (strncmp (name, ".sdata2", 7) == 0
6415 || strncmp (name, ".sbss2", 6) == 0)
6416 {
6417 reg = 2;
6418 addend -= htab->sdata[1].sym_val;
6419 }
6420
6421 else if (strcmp (name, ".PPC.EMB.sdata0") == 0
6422 || strcmp (name, ".PPC.EMB.sbss0") == 0)
6423 {
6424 reg = 0;
6425 }
6426
6427 else
6428 {
6429 (*_bfd_error_handler)
6430 (_("%B: the target (%s) of a %s relocation is "
6431 "in the wrong output section (%s)"),
6432 input_bfd,
6433 sym_name,
6434 howto->name,
6435 name);
6436
6437 bfd_set_error (bfd_error_bad_value);
6438 ret = FALSE;
6439 continue;
6440 }
6441
6442 if (r_type == R_PPC_EMB_SDA21)
6443 { /* fill in register field */
6444 insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
6445 insn = (insn & ~RA_REGISTER_MASK) | (reg << RA_REGISTER_SHIFT);
6446 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
6447 }
6448 }
6449 break;
6450
6451 /* Relocate against the beginning of the section. */
6452 case R_PPC_SECTOFF:
6453 case R_PPC_SECTOFF_LO:
6454 case R_PPC_SECTOFF_HI:
6455 case R_PPC_SECTOFF_HA:
6456 BFD_ASSERT (sec != NULL);
6457 addend -= sec->output_section->vma;
6458 break;
6459
6460 /* Negative relocations. */
6461 case R_PPC_EMB_NADDR32:
6462 case R_PPC_EMB_NADDR16:
6463 case R_PPC_EMB_NADDR16_LO:
6464 case R_PPC_EMB_NADDR16_HI:
6465 case R_PPC_EMB_NADDR16_HA:
6466 addend -= 2 * relocation;
6467 break;
6468
6469 case R_PPC_COPY:
6470 case R_PPC_GLOB_DAT:
6471 case R_PPC_JMP_SLOT:
6472 case R_PPC_RELATIVE:
6473 case R_PPC_PLT32:
6474 case R_PPC_PLTREL32:
6475 case R_PPC_PLT16_LO:
6476 case R_PPC_PLT16_HI:
6477 case R_PPC_PLT16_HA:
6478 case R_PPC_ADDR30:
6479 case R_PPC_EMB_RELSEC16:
6480 case R_PPC_EMB_RELST_LO:
6481 case R_PPC_EMB_RELST_HI:
6482 case R_PPC_EMB_RELST_HA:
6483 case R_PPC_EMB_BIT_FLD:
6484 (*_bfd_error_handler)
6485 (_("%B: relocation %s is not yet supported for symbol %s."),
6486 input_bfd,
6487 howto->name,
6488 sym_name);
6489
6490 bfd_set_error (bfd_error_invalid_operation);
6491 ret = FALSE;
6492 continue;
6493 }
6494
6495 /* Do any further special processing. */
6496 switch (r_type)
6497 {
6498 default:
6499 break;
6500
6501 case R_PPC_ADDR16_HA:
6502 case R_PPC_REL16_HA:
6503 case R_PPC_GOT16_HA:
6504 case R_PPC_PLT16_HA:
6505 case R_PPC_SECTOFF_HA:
6506 case R_PPC_TPREL16_HA:
6507 case R_PPC_DTPREL16_HA:
6508 case R_PPC_GOT_TLSGD16_HA:
6509 case R_PPC_GOT_TLSLD16_HA:
6510 case R_PPC_GOT_TPREL16_HA:
6511 case R_PPC_GOT_DTPREL16_HA:
6512 case R_PPC_EMB_NADDR16_HA:
6513 case R_PPC_EMB_RELST_HA:
6514 /* It's just possible that this symbol is a weak symbol
6515 that's not actually defined anywhere. In that case,
6516 'sec' would be NULL, and we should leave the symbol
6517 alone (it will be set to zero elsewhere in the link). */
6518 if (sec != NULL)
6519 /* Add 0x10000 if sign bit in 0:15 is set.
6520 Bits 0:15 are not used. */
6521 addend += 0x8000;
6522 break;
6523 }
6524
6525 #ifdef DEBUG
6526 fprintf (stderr, "\ttype = %s (%d), name = %s, symbol index = %ld, "
6527 "offset = %ld, addend = %ld\n",
6528 howto->name,
6529 (int) r_type,
6530 sym_name,
6531 r_symndx,
6532 (long) rel->r_offset,
6533 (long) addend);
6534 #endif
6535
6536 if (unresolved_reloc
6537 && !((input_section->flags & SEC_DEBUGGING) != 0
6538 && h->def_dynamic))
6539 {
6540 (*_bfd_error_handler)
6541 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
6542 input_bfd,
6543 input_section,
6544 (long) rel->r_offset,
6545 howto->name,
6546 sym_name);
6547 ret = FALSE;
6548 }
6549
6550 r = _bfd_final_link_relocate (howto,
6551 input_bfd,
6552 input_section,
6553 contents,
6554 rel->r_offset,
6555 relocation,
6556 addend);
6557
6558 if (r != bfd_reloc_ok)
6559 {
6560 if (r == bfd_reloc_overflow)
6561 {
6562 if (warned)
6563 continue;
6564 if (h != NULL
6565 && h->root.type == bfd_link_hash_undefweak
6566 && howto->pc_relative)
6567 {
6568 /* Assume this is a call protected by other code that
6569 detect the symbol is undefined. If this is the case,
6570 we can safely ignore the overflow. If not, the
6571 program is hosed anyway, and a little warning isn't
6572 going to help. */
6573
6574 continue;
6575 }
6576
6577 if (! (*info->callbacks->reloc_overflow) (info,
6578 (h ? &h->root : NULL),
6579 sym_name,
6580 howto->name,
6581 rel->r_addend,
6582 input_bfd,
6583 input_section,
6584 rel->r_offset))
6585 return FALSE;
6586 }
6587 else
6588 {
6589 (*_bfd_error_handler)
6590 (_("%B(%A+0x%lx): %s reloc against `%s': error %d"),
6591 input_bfd, input_section,
6592 (long) rel->r_offset, howto->name, sym_name, (int) r);
6593 ret = FALSE;
6594 }
6595 }
6596 }
6597
6598 #ifdef DEBUG
6599 fprintf (stderr, "\n");
6600 #endif
6601
6602 return ret;
6603 }
6604
6605 #define PPC_LO(v) ((v) & 0xffff)
6606 #define PPC_HI(v) (((v) >> 16) & 0xffff)
6607 #define PPC_HA(v) PPC_HI ((v) + 0x8000)
6608
6609 /* Finish up dynamic symbol handling. We set the contents of various
6610 dynamic sections here. */
6611
6612 static bfd_boolean
ppc_elf_finish_dynamic_symbol(bfd * output_bfd,struct bfd_link_info * info,struct elf_link_hash_entry * h,Elf_Internal_Sym * sym)6613 ppc_elf_finish_dynamic_symbol (bfd *output_bfd,
6614 struct bfd_link_info *info,
6615 struct elf_link_hash_entry *h,
6616 Elf_Internal_Sym *sym)
6617 {
6618 struct ppc_elf_link_hash_table *htab;
6619 struct plt_entry *ent;
6620 bfd_boolean doneone;
6621
6622 #ifdef DEBUG
6623 fprintf (stderr, "ppc_elf_finish_dynamic_symbol called for %s",
6624 h->root.root.string);
6625 #endif
6626
6627 htab = ppc_elf_hash_table (info);
6628 BFD_ASSERT (htab->elf.dynobj != NULL);
6629
6630 doneone = FALSE;
6631 for (ent = h->plt.plist; ent != NULL; ent = ent->next)
6632 if (ent->plt.offset != (bfd_vma) -1)
6633 {
6634 if (!doneone)
6635 {
6636 Elf_Internal_Rela rela;
6637 bfd_byte *loc;
6638 bfd_vma reloc_index;
6639
6640 if (!(htab->old_plt || htab->is_vxworks))
6641 reloc_index = ent->plt.offset / 4;
6642 else
6643 {
6644 reloc_index = ((ent->plt.offset - htab->plt_initial_entry_size)
6645 / htab->plt_slot_size);
6646 if (reloc_index > PLT_NUM_SINGLE_ENTRIES
6647 && !htab->is_vxworks)
6648 reloc_index -= (reloc_index - PLT_NUM_SINGLE_ENTRIES) / 2;
6649 }
6650
6651 /* This symbol has an entry in the procedure linkage table.
6652 Set it up. */
6653 if (htab->is_vxworks)
6654 {
6655 bfd_vma got_offset;
6656 const bfd_vma *plt_entry;
6657
6658 /* The first three entries in .got.plt are reserved. */
6659 got_offset = (reloc_index + 3) * 4;
6660
6661 /* Use the right PLT. */
6662 plt_entry = info->shared ? ppc_elf_vxworks_pic_plt_entry
6663 : ppc_elf_vxworks_plt_entry;
6664
6665 /* Fill in the .plt on VxWorks. */
6666 if (info->shared)
6667 {
6668 bfd_vma got_offset_hi = (got_offset >> 16)
6669 + ((got_offset & 0x8000) >> 15);
6670
6671 bfd_put_32 (output_bfd,
6672 plt_entry[0] | (got_offset_hi & 0xffff),
6673 htab->plt->contents + ent->plt.offset + 0);
6674 bfd_put_32 (output_bfd,
6675 plt_entry[1] | (got_offset & 0xffff),
6676 htab->plt->contents + ent->plt.offset + 4);
6677 }
6678 else
6679 {
6680 bfd_vma got_loc = (got_offset
6681 + htab->hgot->root.u.def.value
6682 + htab->hgot->root.u.def.section->output_offset
6683 + htab->hgot->root.u.def.section->output_section->vma);
6684 bfd_vma got_loc_hi = (got_loc >> 16)
6685 + ((got_loc & 0x8000) >> 15);
6686
6687 bfd_put_32 (output_bfd,
6688 plt_entry[0] | (got_loc_hi & 0xffff),
6689 htab->plt->contents + ent->plt.offset + 0);
6690 bfd_put_32 (output_bfd,
6691 plt_entry[1] | (got_loc & 0xffff),
6692 htab->plt->contents + ent->plt.offset + 4);
6693 }
6694
6695 bfd_put_32 (output_bfd, plt_entry[2],
6696 htab->plt->contents + ent->plt.offset + 8);
6697 bfd_put_32 (output_bfd, plt_entry[3],
6698 htab->plt->contents + ent->plt.offset + 12);
6699
6700 /* This instruction is an immediate load. The value loaded is
6701 the byte offset of the R_PPC_JMP_SLOT relocation from the
6702 start of the .rela.plt section. The value is stored in the
6703 low-order 16 bits of the load instruction. */
6704 /* NOTE: It appears that this is now an index rather than a
6705 prescaled offset. */
6706 bfd_put_32 (output_bfd,
6707 plt_entry[4] | reloc_index,
6708 htab->plt->contents + ent->plt.offset + 16);
6709 /* This instruction is a PC-relative branch whose target is
6710 the start of the PLT section. The address of this branch
6711 instruction is 20 bytes beyond the start of this PLT entry.
6712 The address is encoded in bits 6-29, inclusive. The value
6713 stored is right-shifted by two bits, permitting a 26-bit
6714 offset. */
6715 bfd_put_32 (output_bfd,
6716 (plt_entry[5]
6717 | (-(ent->plt.offset + 20) & 0x03fffffc)),
6718 htab->plt->contents + ent->plt.offset + 20);
6719 bfd_put_32 (output_bfd, plt_entry[6],
6720 htab->plt->contents + ent->plt.offset + 24);
6721 bfd_put_32 (output_bfd, plt_entry[7],
6722 htab->plt->contents + ent->plt.offset + 28);
6723
6724 /* Fill in the GOT entry corresponding to this PLT slot with
6725 the address immediately after the the "bctr" instruction
6726 in this PLT entry. */
6727 bfd_put_32 (output_bfd, (htab->plt->output_section->vma
6728 + htab->plt->output_offset
6729 + ent->plt.offset + 16),
6730 htab->sgotplt->contents + got_offset);
6731
6732 if (!info->shared)
6733 {
6734 /* Fill in a couple of entries in .rela.plt.unloaded. */
6735 loc = htab->srelplt2->contents
6736 + ((VXWORKS_PLTRESOLVE_RELOCS + reloc_index
6737 * VXWORKS_PLT_NON_JMP_SLOT_RELOCS)
6738 * sizeof (Elf32_External_Rela));
6739
6740 /* Provide the @ha relocation for the first instruction. */
6741 rela.r_offset = (htab->plt->output_section->vma
6742 + htab->plt->output_offset
6743 + ent->plt.offset + 2);
6744 rela.r_info = ELF32_R_INFO (htab->hgot->indx,
6745 R_PPC_ADDR16_HA);
6746 rela.r_addend = got_offset;
6747 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
6748 loc += sizeof (Elf32_External_Rela);
6749
6750 /* Provide the @l relocation for the second instruction. */
6751 rela.r_offset = (htab->plt->output_section->vma
6752 + htab->plt->output_offset
6753 + ent->plt.offset + 6);
6754 rela.r_info = ELF32_R_INFO (htab->hgot->indx,
6755 R_PPC_ADDR16_LO);
6756 rela.r_addend = got_offset;
6757 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
6758 loc += sizeof (Elf32_External_Rela);
6759
6760 /* Provide a relocation for the GOT entry corresponding to this
6761 PLT slot. Point it at the middle of the .plt entry. */
6762 rela.r_offset = (htab->sgotplt->output_section->vma
6763 + htab->sgotplt->output_offset
6764 + got_offset);
6765 rela.r_info = ELF32_R_INFO (htab->hplt->indx,
6766 R_PPC_ADDR32);
6767 rela.r_addend = ent->plt.offset + 16;
6768 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
6769 }
6770
6771 /* VxWorks uses non-standard semantics for R_PPC_JMP_SLOT.
6772 In particular, the offset for the relocation is not the
6773 address of the PLT entry for this function, as specified
6774 by the ABI. Instead, the offset is set to the address of
6775 the GOT slot for this function. See EABI 4.4.4.1. */
6776 rela.r_offset = (htab->sgotplt->output_section->vma
6777 + htab->sgotplt->output_offset
6778 + got_offset);
6779
6780 }
6781 else
6782 {
6783 rela.r_offset = (htab->plt->output_section->vma
6784 + htab->plt->output_offset
6785 + ent->plt.offset);
6786 if (htab->old_plt)
6787 {
6788 /* We don't need to fill in the .plt. The ppc dynamic
6789 linker will fill it in. */
6790 }
6791 else
6792 {
6793 bfd_vma val = (htab->glink_pltresolve + ent->plt.offset
6794 + htab->glink->output_section->vma
6795 + htab->glink->output_offset);
6796 bfd_put_32 (output_bfd, val,
6797 htab->plt->contents + ent->plt.offset);
6798 }
6799 }
6800
6801 /* Fill in the entry in the .rela.plt section. */
6802 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_JMP_SLOT);
6803 rela.r_addend = 0;
6804
6805 loc = (htab->relplt->contents
6806 + reloc_index * sizeof (Elf32_External_Rela));
6807 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
6808
6809 if (!h->def_regular)
6810 {
6811 /* Mark the symbol as undefined, rather than as defined in
6812 the .plt section. Leave the value alone. */
6813 sym->st_shndx = SHN_UNDEF;
6814 /* If the symbol is weak, we do need to clear the value.
6815 Otherwise, the PLT entry would provide a definition for
6816 the symbol even if the symbol wasn't defined anywhere,
6817 and so the symbol would never be NULL. */
6818 if (!h->ref_regular_nonweak)
6819 sym->st_value = 0;
6820 }
6821 doneone = TRUE;
6822 }
6823
6824 if (!htab->old_plt)
6825 {
6826 bfd_vma plt;
6827 unsigned char *p;
6828
6829 plt = (ent->plt.offset
6830 + htab->plt->output_section->vma
6831 + htab->plt->output_offset);
6832 p = (unsigned char *) htab->glink->contents + ent->glink_offset;
6833
6834 if (info->shared || info->pie)
6835 {
6836 bfd_vma got = 0;
6837
6838 if (ent->addend >= 32768)
6839 got = (ent->addend
6840 + ent->sec->output_section->vma
6841 + ent->sec->output_offset);
6842 else if (htab->elf.hgot != NULL)
6843 got = (htab->elf.hgot->root.u.def.value
6844 + htab->elf.hgot->root.u.def.section->output_section->vma
6845 + htab->elf.hgot->root.u.def.section->output_offset);
6846
6847 plt -= got;
6848
6849 if (plt + 0x8000 < 0x10000)
6850 {
6851 bfd_put_32 (output_bfd, LWZ_11_30 + PPC_LO (plt), p);
6852 p += 4;
6853 bfd_put_32 (output_bfd, MTCTR_11, p);
6854 p += 4;
6855 bfd_put_32 (output_bfd, BCTR, p);
6856 p += 4;
6857 bfd_put_32 (output_bfd, NOP, p);
6858 p += 4;
6859 }
6860 else
6861 {
6862 bfd_put_32 (output_bfd, ADDIS_11_30 + PPC_HA (plt), p);
6863 p += 4;
6864 bfd_put_32 (output_bfd, LWZ_11_11 + PPC_LO (plt), p);
6865 p += 4;
6866 bfd_put_32 (output_bfd, MTCTR_11, p);
6867 p += 4;
6868 bfd_put_32 (output_bfd, BCTR, p);
6869 p += 4;
6870 }
6871 }
6872 else
6873 {
6874 bfd_put_32 (output_bfd, LIS_11 + PPC_HA (plt), p);
6875 p += 4;
6876 bfd_put_32 (output_bfd, LWZ_11_11 + PPC_LO (plt), p);
6877 p += 4;
6878 bfd_put_32 (output_bfd, MTCTR_11, p);
6879 p += 4;
6880 bfd_put_32 (output_bfd, BCTR, p);
6881 p += 4;
6882
6883 /* We only need one non-PIC glink stub. */
6884 break;
6885 }
6886 }
6887 else
6888 break;
6889 }
6890
6891 if (h->needs_copy)
6892 {
6893 asection *s;
6894 Elf_Internal_Rela rela;
6895 bfd_byte *loc;
6896
6897 /* This symbols needs a copy reloc. Set it up. */
6898
6899 #ifdef DEBUG
6900 fprintf (stderr, ", copy");
6901 #endif
6902
6903 BFD_ASSERT (h->dynindx != -1);
6904
6905 if (ppc_elf_hash_entry (h)->has_sda_refs)
6906 s = htab->relsbss;
6907 else
6908 s = htab->relbss;
6909 BFD_ASSERT (s != NULL);
6910
6911 rela.r_offset = (h->root.u.def.value
6912 + h->root.u.def.section->output_section->vma
6913 + h->root.u.def.section->output_offset);
6914 rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_COPY);
6915 rela.r_addend = 0;
6916 loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
6917 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
6918 }
6919
6920 #ifdef DEBUG
6921 fprintf (stderr, "\n");
6922 #endif
6923
6924 /* Mark some specially defined symbols as absolute. */
6925 if (strcmp (h->root.root.string, "_DYNAMIC") == 0
6926 || (!htab->is_vxworks
6927 && (h == htab->elf.hgot
6928 || strcmp (h->root.root.string,
6929 "_PROCEDURE_LINKAGE_TABLE_") == 0)))
6930 sym->st_shndx = SHN_ABS;
6931
6932 return TRUE;
6933 }
6934
6935 static enum elf_reloc_type_class
ppc_elf_reloc_type_class(const Elf_Internal_Rela * rela)6936 ppc_elf_reloc_type_class (const Elf_Internal_Rela *rela)
6937 {
6938 switch (ELF32_R_TYPE (rela->r_info))
6939 {
6940 case R_PPC_RELATIVE:
6941 return reloc_class_relative;
6942 case R_PPC_REL24:
6943 case R_PPC_ADDR24:
6944 case R_PPC_JMP_SLOT:
6945 return reloc_class_plt;
6946 case R_PPC_COPY:
6947 return reloc_class_copy;
6948 default:
6949 return reloc_class_normal;
6950 }
6951 }
6952
6953 /* Finish up the dynamic sections. */
6954
6955 static bfd_boolean
ppc_elf_finish_dynamic_sections(bfd * output_bfd,struct bfd_link_info * info)6956 ppc_elf_finish_dynamic_sections (bfd *output_bfd,
6957 struct bfd_link_info *info)
6958 {
6959 asection *sdyn;
6960 asection *splt;
6961 struct ppc_elf_link_hash_table *htab;
6962 bfd_vma got;
6963 bfd * dynobj;
6964
6965 #ifdef DEBUG
6966 fprintf (stderr, "ppc_elf_finish_dynamic_sections called\n");
6967 #endif
6968
6969 htab = ppc_elf_hash_table (info);
6970 dynobj = elf_hash_table (info)->dynobj;
6971 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
6972 if (htab->is_vxworks)
6973 splt = bfd_get_section_by_name (dynobj, ".plt");
6974 else
6975 splt = NULL;
6976
6977 got = 0;
6978 if (htab->elf.hgot != NULL)
6979 got = (htab->elf.hgot->root.u.def.value
6980 + htab->elf.hgot->root.u.def.section->output_section->vma
6981 + htab->elf.hgot->root.u.def.section->output_offset);
6982
6983 if (htab->elf.dynamic_sections_created)
6984 {
6985 Elf32_External_Dyn *dyncon, *dynconend;
6986
6987 BFD_ASSERT (htab->plt != NULL && sdyn != NULL);
6988
6989 dyncon = (Elf32_External_Dyn *) sdyn->contents;
6990 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
6991 for (; dyncon < dynconend; dyncon++)
6992 {
6993 Elf_Internal_Dyn dyn;
6994 asection *s;
6995
6996 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
6997
6998 switch (dyn.d_tag)
6999 {
7000 case DT_PLTGOT:
7001 if (htab->is_vxworks)
7002 s = htab->sgotplt;
7003 else
7004 s = htab->plt;
7005 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
7006 break;
7007
7008 case DT_PLTRELSZ:
7009 dyn.d_un.d_val = htab->relplt->size;
7010 break;
7011
7012 case DT_JMPREL:
7013 s = htab->relplt;
7014 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
7015 break;
7016
7017 case DT_PPC_GOT:
7018 dyn.d_un.d_ptr = got;
7019 break;
7020
7021 case DT_RELASZ:
7022 if (htab->is_vxworks)
7023 {
7024 if (htab->relplt)
7025 dyn.d_un.d_ptr -= htab->relplt->size;
7026 break;
7027 }
7028 continue;
7029
7030 default:
7031 continue;
7032 }
7033
7034 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
7035 }
7036 }
7037
7038 /* Add a blrl instruction at _GLOBAL_OFFSET_TABLE_-4 so that a function can
7039 easily find the address of the _GLOBAL_OFFSET_TABLE_. */
7040 if (htab->got != NULL)
7041 {
7042 unsigned char *p = htab->got->contents;
7043 bfd_vma val;
7044
7045 p += elf_hash_table (info)->hgot->root.u.def.value;
7046 if (htab->old_plt && !htab->is_vxworks)
7047 bfd_put_32 (output_bfd, 0x4e800021 /* blrl */, p - 4);
7048
7049 val = 0;
7050 if (sdyn != NULL)
7051 val = sdyn->output_section->vma + sdyn->output_offset;
7052 bfd_put_32 (output_bfd, val, p);
7053
7054 elf_section_data (htab->got->output_section)->this_hdr.sh_entsize = 4;
7055 }
7056
7057 /* Fill in the first entry in the VxWorks procedure linkage table. */
7058 if (splt && splt->size > 0)
7059 {
7060 /* Use the right PLT. */
7061 static const bfd_vma *plt_entry = NULL;
7062 plt_entry = info->shared ?
7063 ppc_elf_vxworks_pic_plt0_entry : ppc_elf_vxworks_plt0_entry;
7064
7065 if (!info->shared)
7066 {
7067 bfd_vma got_value =
7068 (htab->hgot->root.u.def.section->output_section->vma
7069 + htab->hgot->root.u.def.section->output_offset
7070 + htab->hgot->root.u.def.value);
7071 bfd_vma got_hi = (got_value >> 16) + ((got_value & 0x8000) >> 15);
7072
7073 bfd_put_32 (output_bfd, plt_entry[0] | (got_hi & 0xffff),
7074 splt->contents + 0);
7075 bfd_put_32 (output_bfd, plt_entry[1] | (got_value & 0xffff),
7076 splt->contents + 4);
7077 }
7078 else
7079 {
7080 bfd_put_32 (output_bfd, plt_entry[0], splt->contents + 0);
7081 bfd_put_32 (output_bfd, plt_entry[1], splt->contents + 4);
7082 }
7083 bfd_put_32 (output_bfd, plt_entry[2], splt->contents + 8);
7084 bfd_put_32 (output_bfd, plt_entry[3], splt->contents + 12);
7085 bfd_put_32 (output_bfd, plt_entry[4], splt->contents + 16);
7086 bfd_put_32 (output_bfd, plt_entry[5], splt->contents + 20);
7087 bfd_put_32 (output_bfd, plt_entry[6], splt->contents + 24);
7088 bfd_put_32 (output_bfd, plt_entry[7], splt->contents + 28);
7089
7090 if (! info->shared)
7091 {
7092 Elf_Internal_Rela rela;
7093 bfd_byte *loc;
7094
7095 loc = htab->srelplt2->contents;
7096
7097 /* Output the @ha relocation for the first instruction. */
7098 rela.r_offset = (htab->plt->output_section->vma
7099 + htab->plt->output_offset
7100 + 2);
7101 rela.r_info = ELF32_R_INFO (htab->hgot->indx, R_PPC_ADDR16_HA);
7102 rela.r_addend = 0;
7103 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
7104 loc += sizeof (Elf32_External_Rela);
7105
7106 /* Output the @l relocation for the second instruction. */
7107 rela.r_offset = (htab->plt->output_section->vma
7108 + htab->plt->output_offset
7109 + 6);
7110 rela.r_info = ELF32_R_INFO (htab->hgot->indx, R_PPC_ADDR16_LO);
7111 rela.r_addend = 0;
7112 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
7113 loc += sizeof (Elf32_External_Rela);
7114
7115 /* Fix up the remaining relocations. They may have the wrong
7116 symbol index for _G_O_T_ or _P_L_T_ depending on the order
7117 in which symbols were output. */
7118 while (loc < htab->srelplt2->contents + htab->srelplt2->size)
7119 {
7120 Elf_Internal_Rela rel;
7121
7122 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
7123 rel.r_info = ELF32_R_INFO (htab->hgot->indx, R_PPC_ADDR16_HA);
7124 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
7125 loc += sizeof (Elf32_External_Rela);
7126
7127 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
7128 rel.r_info = ELF32_R_INFO (htab->hgot->indx, R_PPC_ADDR16_LO);
7129 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
7130 loc += sizeof (Elf32_External_Rela);
7131
7132 bfd_elf32_swap_reloc_in (output_bfd, loc, &rel);
7133 rel.r_info = ELF32_R_INFO (htab->hplt->indx, R_PPC_ADDR32);
7134 bfd_elf32_swap_reloc_out (output_bfd, &rel, loc);
7135 loc += sizeof (Elf32_External_Rela);
7136 }
7137 }
7138 }
7139
7140 if (htab->glink != NULL && htab->glink->contents != NULL)
7141 {
7142 unsigned char *p;
7143 unsigned char *endp;
7144 bfd_vma res0;
7145 unsigned int i;
7146
7147 /*
7148 * PIC glink code is the following:
7149 *
7150 * # ith PLT code stub.
7151 * addis 11,30,(plt+(i-1)*4-got)@ha
7152 * lwz 11,(plt+(i-1)*4-got)@l(11)
7153 * mtctr 11
7154 * bctr
7155 *
7156 * # A table of branches, one for each plt entry.
7157 * # The idea is that the plt call stub loads ctr (and r11) with these
7158 * # addresses, so (r11 - res_0) gives the plt index * 4.
7159 * res_0: b PLTresolve
7160 * res_1: b PLTresolve
7161 * .
7162 * # Some number of entries towards the end can be nops
7163 * res_n_m3: nop
7164 * res_n_m2: nop
7165 * res_n_m1:
7166 *
7167 * PLTresolve:
7168 * addis 11,11,(1f-res_0)@ha
7169 * mflr 0
7170 * bcl 20,31,1f
7171 * 1: addi 11,11,(1b-res_0)@l
7172 * mflr 12
7173 * mtlr 0
7174 * sub 11,11,12 # r11 = index * 4
7175 * addis 12,12,(got+4-1b)@ha
7176 * lwz 0,(got+4-1b)@l(12) # got[1] address of dl_runtime_resolve
7177 * lwz 12,(got+8-1b)@l(12) # got[2] contains the map address
7178 * mtctr 0
7179 * add 0,11,11
7180 * add 11,0,11 # r11 = index * 12 = reloc offset.
7181 * bctr
7182 */
7183 static const unsigned int pic_plt_resolve[] =
7184 {
7185 ADDIS_11_11,
7186 MFLR_0,
7187 BCL_20_31,
7188 ADDI_11_11,
7189 MFLR_12,
7190 MTLR_0,
7191 SUB_11_11_12,
7192 ADDIS_12_12,
7193 LWZ_0_12,
7194 LWZ_12_12,
7195 MTCTR_0,
7196 ADD_0_11_11,
7197 ADD_11_0_11,
7198 BCTR,
7199 NOP,
7200 NOP
7201 };
7202
7203 static const unsigned int plt_resolve[] =
7204 {
7205 LIS_12,
7206 ADDIS_11_11,
7207 LWZ_0_12,
7208 ADDI_11_11,
7209 MTCTR_0,
7210 ADD_0_11_11,
7211 LWZ_12_12,
7212 ADD_11_0_11,
7213 BCTR,
7214 NOP,
7215 NOP,
7216 NOP,
7217 NOP,
7218 NOP,
7219 NOP,
7220 NOP
7221 };
7222
7223 if (ARRAY_SIZE (pic_plt_resolve) != GLINK_PLTRESOLVE / 4)
7224 abort ();
7225 if (ARRAY_SIZE (plt_resolve) != GLINK_PLTRESOLVE / 4)
7226 abort ();
7227
7228 /* Build the branch table, one for each plt entry (less one),
7229 and perhaps some padding. */
7230 p = htab->glink->contents;
7231 p += htab->glink_pltresolve;
7232 endp = htab->glink->contents;
7233 endp += htab->glink->size - GLINK_PLTRESOLVE;
7234 while (p < endp - 8 * 4)
7235 {
7236 bfd_put_32 (output_bfd, B + endp - p, p);
7237 p += 4;
7238 }
7239 while (p < endp)
7240 {
7241 bfd_put_32 (output_bfd, NOP, p);
7242 p += 4;
7243 }
7244
7245 res0 = (htab->glink_pltresolve
7246 + htab->glink->output_section->vma
7247 + htab->glink->output_offset);
7248
7249 /* Last comes the PLTresolve stub. */
7250 if (info->shared || info->pie)
7251 {
7252 bfd_vma bcl;
7253
7254 for (i = 0; i < ARRAY_SIZE (pic_plt_resolve); i++)
7255 {
7256 bfd_put_32 (output_bfd, pic_plt_resolve[i], p);
7257 p += 4;
7258 }
7259 p -= 4 * ARRAY_SIZE (pic_plt_resolve);
7260
7261 bcl = (htab->glink->size - GLINK_PLTRESOLVE + 3*4
7262 + htab->glink->output_section->vma
7263 + htab->glink->output_offset);
7264
7265 bfd_put_32 (output_bfd,
7266 ADDIS_11_11 + PPC_HA (bcl - res0), p + 0*4);
7267 bfd_put_32 (output_bfd,
7268 ADDI_11_11 + PPC_LO (bcl - res0), p + 3*4);
7269 bfd_put_32 (output_bfd,
7270 ADDIS_12_12 + PPC_HA (got + 4 - bcl), p + 7*4);
7271 if (PPC_HA (got + 4 - bcl) == PPC_HA (got + 8 - bcl))
7272 {
7273 bfd_put_32 (output_bfd,
7274 LWZ_0_12 + PPC_LO (got + 4 - bcl), p + 8*4);
7275 bfd_put_32 (output_bfd,
7276 LWZ_12_12 + PPC_LO (got + 8 - bcl), p + 9*4);
7277 }
7278 else
7279 {
7280 bfd_put_32 (output_bfd,
7281 LWZU_0_12 + PPC_LO (got + 4 - bcl), p + 8*4);
7282 bfd_put_32 (output_bfd,
7283 LWZ_12_12 + 4, p + 9*4);
7284 }
7285 }
7286 else
7287 {
7288 for (i = 0; i < ARRAY_SIZE (plt_resolve); i++)
7289 {
7290 bfd_put_32 (output_bfd, plt_resolve[i], p);
7291 p += 4;
7292 }
7293 p -= 4 * ARRAY_SIZE (plt_resolve);
7294
7295 bfd_put_32 (output_bfd,
7296 LIS_12 + PPC_HA (got + 4), p + 0*4);
7297 bfd_put_32 (output_bfd,
7298 ADDIS_11_11 + PPC_HA (-res0), p + 1*4);
7299 bfd_put_32 (output_bfd,
7300 ADDI_11_11 + PPC_LO (-res0), p + 3*4);
7301 if (PPC_HA (got + 4) == PPC_HA (got + 8))
7302 {
7303 bfd_put_32 (output_bfd,
7304 LWZ_0_12 + PPC_LO (got + 4), p + 2*4);
7305 bfd_put_32 (output_bfd,
7306 LWZ_12_12 + PPC_LO (got + 8), p + 6*4);
7307 }
7308 else
7309 {
7310 bfd_put_32 (output_bfd,
7311 LWZU_0_12 + PPC_LO (got + 4), p + 2*4);
7312 bfd_put_32 (output_bfd,
7313 LWZ_12_12 + 4, p + 6*4);
7314 }
7315 }
7316 }
7317
7318 return TRUE;
7319 }
7320
7321 #define TARGET_LITTLE_SYM bfd_elf32_powerpcle_vec
7322 #define TARGET_LITTLE_NAME "elf32-powerpcle"
7323 #define TARGET_BIG_SYM bfd_elf32_powerpc_vec
7324 #define TARGET_BIG_NAME "elf32-powerpc"
7325 #define ELF_ARCH bfd_arch_powerpc
7326 #define ELF_MACHINE_CODE EM_PPC
7327 #ifdef __QNXTARGET__
7328 #define ELF_MAXPAGESIZE 0x1000
7329 #else
7330 #define ELF_MAXPAGESIZE 0x10000
7331 #endif
7332 #define ELF_MINPAGESIZE 0x1000
7333 #define elf_info_to_howto ppc_elf_info_to_howto
7334
7335 #ifdef EM_CYGNUS_POWERPC
7336 #define ELF_MACHINE_ALT1 EM_CYGNUS_POWERPC
7337 #endif
7338
7339 #ifdef EM_PPC_OLD
7340 #define ELF_MACHINE_ALT2 EM_PPC_OLD
7341 #endif
7342
7343 #define elf_backend_plt_not_loaded 1
7344 #define elf_backend_can_gc_sections 1
7345 #define elf_backend_can_refcount 1
7346 #define elf_backend_rela_normal 1
7347
7348 #define bfd_elf32_mkobject ppc_elf_mkobject
7349 #define bfd_elf32_bfd_merge_private_bfd_data ppc_elf_merge_private_bfd_data
7350 #define bfd_elf32_bfd_relax_section ppc_elf_relax_section
7351 #define bfd_elf32_bfd_reloc_type_lookup ppc_elf_reloc_type_lookup
7352 #define bfd_elf32_bfd_set_private_flags ppc_elf_set_private_flags
7353 #define bfd_elf32_bfd_link_hash_table_create ppc_elf_link_hash_table_create
7354
7355 #define elf_backend_object_p ppc_elf_object_p
7356 #define elf_backend_gc_mark_hook ppc_elf_gc_mark_hook
7357 #define elf_backend_gc_sweep_hook ppc_elf_gc_sweep_hook
7358 #define elf_backend_section_from_shdr ppc_elf_section_from_shdr
7359 #define elf_backend_relocate_section ppc_elf_relocate_section
7360 #define elf_backend_create_dynamic_sections ppc_elf_create_dynamic_sections
7361 #define elf_backend_check_relocs ppc_elf_check_relocs
7362 #define elf_backend_copy_indirect_symbol ppc_elf_copy_indirect_symbol
7363 #define elf_backend_adjust_dynamic_symbol ppc_elf_adjust_dynamic_symbol
7364 #define elf_backend_add_symbol_hook ppc_elf_add_symbol_hook
7365 #define elf_backend_size_dynamic_sections ppc_elf_size_dynamic_sections
7366 #define elf_backend_finish_dynamic_symbol ppc_elf_finish_dynamic_symbol
7367 #define elf_backend_finish_dynamic_sections ppc_elf_finish_dynamic_sections
7368 #define elf_backend_fake_sections ppc_elf_fake_sections
7369 #define elf_backend_additional_program_headers ppc_elf_additional_program_headers
7370 #define elf_backend_grok_prstatus ppc_elf_grok_prstatus
7371 #define elf_backend_grok_psinfo ppc_elf_grok_psinfo
7372 #define elf_backend_reloc_type_class ppc_elf_reloc_type_class
7373 #define elf_backend_begin_write_processing ppc_elf_begin_write_processing
7374 #define elf_backend_final_write_processing ppc_elf_final_write_processing
7375 #define elf_backend_write_section ppc_elf_write_section
7376 #define elf_backend_get_sec_type_attr ppc_elf_get_sec_type_attr
7377 #define elf_backend_plt_sym_val ppc_elf_plt_sym_val
7378
7379 #include "elf32-target.h"
7380
7381 /* VxWorks Target */
7382
7383 #undef TARGET_LITTLE_SYM
7384 #undef TARGET_LITTLE_NAME
7385
7386 #undef TARGET_BIG_SYM
7387 #define TARGET_BIG_SYM bfd_elf32_powerpc_vxworks_vec
7388 #undef TARGET_BIG_NAME
7389 #define TARGET_BIG_NAME "elf32-powerpc-vxworks"
7390
7391 /* VxWorks uses the elf default section flags for .plt. */
7392 static const struct bfd_elf_special_section *
ppc_elf_vxworks_get_sec_type_attr(bfd * abfd ATTRIBUTE_UNUSED,asection * sec)7393 ppc_elf_vxworks_get_sec_type_attr (bfd *abfd ATTRIBUTE_UNUSED, asection *sec)
7394 {
7395 if (sec->name == NULL)
7396 return NULL;
7397
7398 if (strcmp (sec->name, ".plt") == 0)
7399 return _bfd_elf_get_sec_type_attr (abfd, sec);
7400
7401 return ppc_elf_get_sec_type_attr (abfd, sec);
7402 }
7403
7404 /* Like ppc_elf_link_hash_table_create, but overrides
7405 appropriately for VxWorks. */
7406 static struct bfd_link_hash_table *
ppc_elf_vxworks_link_hash_table_create(bfd * abfd)7407 ppc_elf_vxworks_link_hash_table_create (bfd *abfd)
7408 {
7409 struct bfd_link_hash_table *ret;
7410
7411 ret = ppc_elf_link_hash_table_create (abfd);
7412 if (ret)
7413 {
7414 struct ppc_elf_link_hash_table *htab
7415 = (struct ppc_elf_link_hash_table *)ret;
7416 htab->is_vxworks = 1;
7417 htab->plt_entry_size = VXWORKS_PLT_ENTRY_SIZE;
7418 htab->plt_slot_size = VXWORKS_PLT_ENTRY_SIZE;
7419 htab->plt_initial_entry_size = VXWORKS_PLT_INITIAL_ENTRY_SIZE;
7420 }
7421 return ret;
7422 }
7423
7424 /* Tweak magic VxWorks symbols as they are loaded. */
7425 static bfd_boolean
ppc_elf_vxworks_add_symbol_hook(bfd * abfd,struct bfd_link_info * info,Elf_Internal_Sym * sym,const char ** namep ATTRIBUTE_UNUSED,flagword * flagsp ATTRIBUTE_UNUSED,asection ** secp,bfd_vma * valp)7426 ppc_elf_vxworks_add_symbol_hook (bfd *abfd,
7427 struct bfd_link_info *info,
7428 Elf_Internal_Sym *sym,
7429 const char **namep ATTRIBUTE_UNUSED,
7430 flagword *flagsp ATTRIBUTE_UNUSED,
7431 asection **secp,
7432 bfd_vma *valp)
7433 {
7434 if (!elf_vxworks_add_symbol_hook(abfd, info, sym,namep, flagsp, secp,
7435 valp))
7436 return FALSE;
7437
7438 return ppc_elf_add_symbol_hook(abfd, info, sym,namep, flagsp, secp, valp);
7439 }
7440
7441 /* Tweak magic VxWorks symbols as they are written to the output file. */
7442 static bfd_boolean
elf_i386_vxworks_link_output_symbol_hook(struct bfd_link_info * info ATTRIBUTE_UNUSED,const char * name,Elf_Internal_Sym * sym,asection * input_sec ATTRIBUTE_UNUSED,struct elf_link_hash_entry * h ATTRIBUTE_UNUSED)7443 elf_i386_vxworks_link_output_symbol_hook (struct bfd_link_info *info
7444 ATTRIBUTE_UNUSED,
7445 const char *name,
7446 Elf_Internal_Sym *sym,
7447 asection *input_sec ATTRIBUTE_UNUSED,
7448 struct elf_link_hash_entry *h
7449 ATTRIBUTE_UNUSED)
7450 {
7451 /* Ignore the first dummy symbol. */
7452 if (!name)
7453 return TRUE;
7454
7455 return elf_vxworks_link_output_symbol_hook (name, sym);
7456 }
7457
7458 static void
ppc_elf_vxworks_final_write_processing(bfd * abfd,bfd_boolean linker)7459 ppc_elf_vxworks_final_write_processing (bfd *abfd, bfd_boolean linker)
7460 {
7461 ppc_elf_final_write_processing(abfd, linker);
7462 elf_vxworks_final_write_processing(abfd, linker);
7463 }
7464
7465 /* On VxWorks, we emit relocations against _PROCEDURE_LINKAGE_TABLE_, so
7466 define it. */
7467 #undef elf_backend_want_plt_sym
7468 #define elf_backend_want_plt_sym 1
7469 #undef elf_backend_want_got_plt
7470 #define elf_backend_want_got_plt 1
7471 #undef elf_backend_got_symbol_offset
7472 #define elf_backend_got_symbol_offset 0
7473 #undef elf_backend_plt_not_loaded
7474 #define elf_backend_plt_not_loaded 0
7475 #undef elf_backend_plt_readonly
7476 #define elf_backend_plt_readonly 1
7477 #undef elf_backend_got_header_size
7478 #define elf_backend_got_header_size 12
7479
7480 #undef bfd_elf32_bfd_link_hash_table_create
7481 #define bfd_elf32_bfd_link_hash_table_create \
7482 ppc_elf_vxworks_link_hash_table_create
7483 #undef elf_backend_add_symbol_hook
7484 #define elf_backend_add_symbol_hook \
7485 ppc_elf_vxworks_add_symbol_hook
7486 #undef elf_backend_link_output_symbol_hook
7487 #define elf_backend_link_output_symbol_hook \
7488 elf_i386_vxworks_link_output_symbol_hook
7489 #undef elf_backend_final_write_processing
7490 #define elf_backend_final_write_processing \
7491 ppc_elf_vxworks_final_write_processing
7492 #undef elf_backend_get_sec_type_attr
7493 #define elf_backend_get_sec_type_attr \
7494 ppc_elf_vxworks_get_sec_type_attr
7495 #undef elf_backend_emit_relocs
7496 #define elf_backend_emit_relocs \
7497 elf_vxworks_emit_relocs
7498
7499 #undef elf32_bed
7500 #define elf32_bed ppc_elf_vxworks_bed
7501
7502 #include "elf32-target.h"
7503