1 /* MIPS-specific support for 32-bit ELF
2 Copyright 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002,
3 2003, 2004, 2005, 2007 Free Software Foundation, Inc.
4
5 Most of the information added by Ian Lance Taylor, Cygnus Support,
6 <ian@cygnus.com>.
7 N32/64 ABI support added by Mark Mitchell, CodeSourcery, LLC.
8 <mark@codesourcery.com>
9 Traditional MIPS targets support added by Koundinya.K, Dansk Data
10 Elektronik & Operations Research Group. <kk@ddeorg.soft.net>
11
12 This file is part of BFD, the Binary File Descriptor library.
13
14 This program is free software; you can redistribute it and/or modify
15 it under the terms of the GNU General Public License as published by
16 the Free Software Foundation; either version 2 of the License, or
17 (at your option) any later version.
18
19 This program is distributed in the hope that it will be useful,
20 but WITHOUT ANY WARRANTY; without even the implied warranty of
21 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
22 GNU General Public License for more details.
23
24 You should have received a copy of the GNU General Public License
25 along with this program; if not, write to the Free Software
26 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */
27
28 /* This file handles MIPS ELF targets. SGI Irix 5 uses a slightly
29 different MIPS ELF from other targets. This matters when linking.
30 This file supports both, switching at runtime. */
31
32 #include "sysdep.h"
33 #include "bfd.h"
34 #include "libbfd.h"
35 #include "bfdlink.h"
36 #include "genlink.h"
37 #include "elf-bfd.h"
38 #include "elfxx-mips.h"
39 #include "elf/mips.h"
40 #include "elf-vxworks.h"
41
42 /* Get the ECOFF swapping routines. */
43 #include "coff/sym.h"
44 #include "coff/symconst.h"
45 #include "coff/internal.h"
46 #include "coff/ecoff.h"
47 #include "coff/mips.h"
48 #define ECOFF_SIGNED_32
49 #include "ecoffswap.h"
50
51 static bfd_reloc_status_type gprel32_with_gp
52 (bfd *, asymbol *, arelent *, asection *, bfd_boolean, void *, bfd_vma);
53 static bfd_reloc_status_type mips_elf_gprel32_reloc
54 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
55 static bfd_reloc_status_type mips32_64bit_reloc
56 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
57 static reloc_howto_type *bfd_elf32_bfd_reloc_type_lookup
58 (bfd *, bfd_reloc_code_real_type);
59 static reloc_howto_type *mips_elf32_rtype_to_howto
60 (unsigned int, bfd_boolean);
61 static void mips_info_to_howto_rel
62 (bfd *, arelent *, Elf_Internal_Rela *);
63 static void mips_info_to_howto_rela
64 (bfd *, arelent *, Elf_Internal_Rela *);
65 static bfd_boolean mips_elf_sym_is_global
66 (bfd *, asymbol *);
67 static bfd_boolean mips_elf32_object_p
68 (bfd *);
69 static bfd_boolean mips_elf_is_local_label_name
70 (bfd *, const char *);
71 static bfd_reloc_status_type mips16_gprel_reloc
72 (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
73 static bfd_reloc_status_type mips_elf_final_gp
74 (bfd *, asymbol *, bfd_boolean, char **, bfd_vma *);
75 static bfd_boolean mips_elf_assign_gp
76 (bfd *, bfd_vma *);
77 static bfd_boolean elf32_mips_grok_prstatus
78 (bfd *, Elf_Internal_Note *);
79 static bfd_boolean elf32_mips_grok_psinfo
80 (bfd *, Elf_Internal_Note *);
81 static irix_compat_t elf32_mips_irix_compat
82 (bfd *);
83
84 extern const bfd_target bfd_elf32_bigmips_vec;
85 extern const bfd_target bfd_elf32_littlemips_vec;
86
87 /* Nonzero if ABFD is using the N32 ABI. */
88 #define ABI_N32_P(abfd) \
89 ((elf_elfheader (abfd)->e_flags & EF_MIPS_ABI2) != 0)
90
91 /* Whether we are trying to be compatible with IRIX at all. */
92 #define SGI_COMPAT(abfd) \
93 (elf32_mips_irix_compat (abfd) != ict_none)
94
95 /* The number of local .got entries we reserve. */
96 #define MIPS_RESERVED_GOTNO (2)
97
98 /* In case we're on a 32-bit machine, construct a 64-bit "-1" value
99 from smaller values. Start with zero, widen, *then* decrement. */
100 #define MINUS_ONE (((bfd_vma)0) - 1)
101
102 /* The relocation table used for SHT_REL sections. */
103
104 static reloc_howto_type elf_mips_howto_table_rel[] =
105 {
106 /* No relocation. */
107 HOWTO (R_MIPS_NONE, /* type */
108 0, /* rightshift */
109 0, /* size (0 = byte, 1 = short, 2 = long) */
110 0, /* bitsize */
111 FALSE, /* pc_relative */
112 0, /* bitpos */
113 complain_overflow_dont, /* complain_on_overflow */
114 _bfd_mips_elf_generic_reloc, /* special_function */
115 "R_MIPS_NONE", /* name */
116 FALSE, /* partial_inplace */
117 0, /* src_mask */
118 0, /* dst_mask */
119 FALSE), /* pcrel_offset */
120
121 /* 16 bit relocation. */
122 HOWTO (R_MIPS_16, /* type */
123 0, /* rightshift */
124 2, /* size (0 = byte, 1 = short, 2 = long) */
125 16, /* bitsize */
126 FALSE, /* pc_relative */
127 0, /* bitpos */
128 complain_overflow_signed, /* complain_on_overflow */
129 _bfd_mips_elf_generic_reloc, /* special_function */
130 "R_MIPS_16", /* name */
131 TRUE, /* partial_inplace */
132 0x0000ffff, /* src_mask */
133 0x0000ffff, /* dst_mask */
134 FALSE), /* pcrel_offset */
135
136 /* 32 bit relocation. */
137 HOWTO (R_MIPS_32, /* type */
138 0, /* rightshift */
139 2, /* size (0 = byte, 1 = short, 2 = long) */
140 32, /* bitsize */
141 FALSE, /* pc_relative */
142 0, /* bitpos */
143 complain_overflow_dont, /* complain_on_overflow */
144 _bfd_mips_elf_generic_reloc, /* special_function */
145 "R_MIPS_32", /* name */
146 TRUE, /* partial_inplace */
147 0xffffffff, /* src_mask */
148 0xffffffff, /* dst_mask */
149 FALSE), /* pcrel_offset */
150
151 /* 32 bit symbol relative relocation. */
152 HOWTO (R_MIPS_REL32, /* type */
153 0, /* rightshift */
154 2, /* size (0 = byte, 1 = short, 2 = long) */
155 32, /* bitsize */
156 FALSE, /* pc_relative */
157 0, /* bitpos */
158 complain_overflow_dont, /* complain_on_overflow */
159 _bfd_mips_elf_generic_reloc, /* special_function */
160 "R_MIPS_REL32", /* name */
161 TRUE, /* partial_inplace */
162 0xffffffff, /* src_mask */
163 0xffffffff, /* dst_mask */
164 FALSE), /* pcrel_offset */
165
166 /* 26 bit jump address. */
167 HOWTO (R_MIPS_26, /* type */
168 2, /* rightshift */
169 2, /* size (0 = byte, 1 = short, 2 = long) */
170 26, /* bitsize */
171 FALSE, /* pc_relative */
172 0, /* bitpos */
173 complain_overflow_dont, /* complain_on_overflow */
174 /* This needs complex overflow
175 detection, because the upper four
176 bits must match the PC + 4. */
177 _bfd_mips_elf_generic_reloc, /* special_function */
178 "R_MIPS_26", /* name */
179 TRUE, /* partial_inplace */
180 0x03ffffff, /* src_mask */
181 0x03ffffff, /* dst_mask */
182 FALSE), /* pcrel_offset */
183
184 /* High 16 bits of symbol value. */
185 HOWTO (R_MIPS_HI16, /* type */
186 16, /* rightshift */
187 2, /* size (0 = byte, 1 = short, 2 = long) */
188 16, /* bitsize */
189 FALSE, /* pc_relative */
190 0, /* bitpos */
191 complain_overflow_dont, /* complain_on_overflow */
192 _bfd_mips_elf_hi16_reloc, /* special_function */
193 "R_MIPS_HI16", /* name */
194 TRUE, /* partial_inplace */
195 0x0000ffff, /* src_mask */
196 0x0000ffff, /* dst_mask */
197 FALSE), /* pcrel_offset */
198
199 /* Low 16 bits of symbol value. */
200 HOWTO (R_MIPS_LO16, /* type */
201 0, /* rightshift */
202 2, /* size (0 = byte, 1 = short, 2 = long) */
203 16, /* bitsize */
204 FALSE, /* pc_relative */
205 0, /* bitpos */
206 complain_overflow_dont, /* complain_on_overflow */
207 _bfd_mips_elf_lo16_reloc, /* special_function */
208 "R_MIPS_LO16", /* name */
209 TRUE, /* partial_inplace */
210 0x0000ffff, /* src_mask */
211 0x0000ffff, /* dst_mask */
212 FALSE), /* pcrel_offset */
213
214 /* GP relative reference. */
215 HOWTO (R_MIPS_GPREL16, /* type */
216 0, /* rightshift */
217 2, /* size (0 = byte, 1 = short, 2 = long) */
218 16, /* bitsize */
219 FALSE, /* pc_relative */
220 0, /* bitpos */
221 complain_overflow_signed, /* complain_on_overflow */
222 _bfd_mips_elf32_gprel16_reloc, /* special_function */
223 "R_MIPS_GPREL16", /* name */
224 TRUE, /* partial_inplace */
225 0x0000ffff, /* src_mask */
226 0x0000ffff, /* dst_mask */
227 FALSE), /* pcrel_offset */
228
229 /* Reference to literal section. */
230 HOWTO (R_MIPS_LITERAL, /* type */
231 0, /* rightshift */
232 2, /* size (0 = byte, 1 = short, 2 = long) */
233 16, /* bitsize */
234 FALSE, /* pc_relative */
235 0, /* bitpos */
236 complain_overflow_signed, /* complain_on_overflow */
237 _bfd_mips_elf32_gprel16_reloc, /* special_function */
238 "R_MIPS_LITERAL", /* name */
239 TRUE, /* partial_inplace */
240 0x0000ffff, /* src_mask */
241 0x0000ffff, /* dst_mask */
242 FALSE), /* pcrel_offset */
243
244 /* Reference to global offset table. */
245 HOWTO (R_MIPS_GOT16, /* type */
246 0, /* rightshift */
247 2, /* size (0 = byte, 1 = short, 2 = long) */
248 16, /* bitsize */
249 FALSE, /* pc_relative */
250 0, /* bitpos */
251 complain_overflow_signed, /* complain_on_overflow */
252 _bfd_mips_elf_got16_reloc, /* special_function */
253 "R_MIPS_GOT16", /* name */
254 TRUE, /* partial_inplace */
255 0x0000ffff, /* src_mask */
256 0x0000ffff, /* dst_mask */
257 FALSE), /* pcrel_offset */
258
259 /* 16 bit PC relative reference. Note that the ABI document has a typo
260 and claims R_MIPS_PC16 to be not rightshifted, rendering it useless.
261 We do the right thing here. */
262 HOWTO (R_MIPS_PC16, /* type */
263 2, /* rightshift */
264 2, /* size (0 = byte, 1 = short, 2 = long) */
265 16, /* bitsize */
266 TRUE, /* pc_relative */
267 0, /* bitpos */
268 complain_overflow_signed, /* complain_on_overflow */
269 _bfd_mips_elf_generic_reloc, /* special_function */
270 "R_MIPS_PC16", /* name */
271 TRUE, /* partial_inplace */
272 0x0000ffff, /* src_mask */
273 0x0000ffff, /* dst_mask */
274 TRUE), /* pcrel_offset */
275
276 /* 16 bit call through global offset table. */
277 HOWTO (R_MIPS_CALL16, /* type */
278 0, /* rightshift */
279 2, /* size (0 = byte, 1 = short, 2 = long) */
280 16, /* bitsize */
281 FALSE, /* pc_relative */
282 0, /* bitpos */
283 complain_overflow_signed, /* complain_on_overflow */
284 _bfd_mips_elf_generic_reloc, /* special_function */
285 "R_MIPS_CALL16", /* name */
286 TRUE, /* partial_inplace */
287 0x0000ffff, /* src_mask */
288 0x0000ffff, /* dst_mask */
289 FALSE), /* pcrel_offset */
290
291 /* 32 bit GP relative reference. */
292 HOWTO (R_MIPS_GPREL32, /* type */
293 0, /* rightshift */
294 2, /* size (0 = byte, 1 = short, 2 = long) */
295 32, /* bitsize */
296 FALSE, /* pc_relative */
297 0, /* bitpos */
298 complain_overflow_dont, /* complain_on_overflow */
299 mips_elf_gprel32_reloc, /* special_function */
300 "R_MIPS_GPREL32", /* name */
301 TRUE, /* partial_inplace */
302 0xffffffff, /* src_mask */
303 0xffffffff, /* dst_mask */
304 FALSE), /* pcrel_offset */
305
306 /* The remaining relocs are defined on Irix 5, although they are
307 not defined by the ABI. */
308 EMPTY_HOWTO (13),
309 EMPTY_HOWTO (14),
310 EMPTY_HOWTO (15),
311
312 /* A 5 bit shift field. */
313 HOWTO (R_MIPS_SHIFT5, /* type */
314 0, /* rightshift */
315 2, /* size (0 = byte, 1 = short, 2 = long) */
316 5, /* bitsize */
317 FALSE, /* pc_relative */
318 6, /* bitpos */
319 complain_overflow_bitfield, /* complain_on_overflow */
320 _bfd_mips_elf_generic_reloc, /* special_function */
321 "R_MIPS_SHIFT5", /* name */
322 TRUE, /* partial_inplace */
323 0x000007c0, /* src_mask */
324 0x000007c0, /* dst_mask */
325 FALSE), /* pcrel_offset */
326
327 /* A 6 bit shift field. */
328 /* FIXME: This is not handled correctly; a special function is
329 needed to put the most significant bit in the right place. */
330 HOWTO (R_MIPS_SHIFT6, /* type */
331 0, /* rightshift */
332 2, /* size (0 = byte, 1 = short, 2 = long) */
333 6, /* bitsize */
334 FALSE, /* pc_relative */
335 6, /* bitpos */
336 complain_overflow_bitfield, /* complain_on_overflow */
337 _bfd_mips_elf_generic_reloc, /* special_function */
338 "R_MIPS_SHIFT6", /* name */
339 TRUE, /* partial_inplace */
340 0x000007c4, /* src_mask */
341 0x000007c4, /* dst_mask */
342 FALSE), /* pcrel_offset */
343
344 /* A 64 bit relocation. */
345 HOWTO (R_MIPS_64, /* type */
346 0, /* rightshift */
347 4, /* size (0 = byte, 1 = short, 2 = long) */
348 64, /* bitsize */
349 FALSE, /* pc_relative */
350 0, /* bitpos */
351 complain_overflow_dont, /* complain_on_overflow */
352 mips32_64bit_reloc, /* special_function */
353 "R_MIPS_64", /* name */
354 TRUE, /* partial_inplace */
355 MINUS_ONE, /* src_mask */
356 MINUS_ONE, /* dst_mask */
357 FALSE), /* pcrel_offset */
358
359 /* Displacement in the global offset table. */
360 HOWTO (R_MIPS_GOT_DISP, /* type */
361 0, /* rightshift */
362 2, /* size (0 = byte, 1 = short, 2 = long) */
363 16, /* bitsize */
364 FALSE, /* pc_relative */
365 0, /* bitpos */
366 complain_overflow_signed, /* complain_on_overflow */
367 _bfd_mips_elf_generic_reloc, /* special_function */
368 "R_MIPS_GOT_DISP", /* name */
369 TRUE, /* partial_inplace */
370 0x0000ffff, /* src_mask */
371 0x0000ffff, /* dst_mask */
372 FALSE), /* pcrel_offset */
373
374 /* Displacement to page pointer in the global offset table. */
375 HOWTO (R_MIPS_GOT_PAGE, /* type */
376 0, /* rightshift */
377 2, /* size (0 = byte, 1 = short, 2 = long) */
378 16, /* bitsize */
379 FALSE, /* pc_relative */
380 0, /* bitpos */
381 complain_overflow_signed, /* complain_on_overflow */
382 _bfd_mips_elf_generic_reloc, /* special_function */
383 "R_MIPS_GOT_PAGE", /* name */
384 TRUE, /* partial_inplace */
385 0x0000ffff, /* src_mask */
386 0x0000ffff, /* dst_mask */
387 FALSE), /* pcrel_offset */
388
389 /* Offset from page pointer in the global offset table. */
390 HOWTO (R_MIPS_GOT_OFST, /* type */
391 0, /* rightshift */
392 2, /* size (0 = byte, 1 = short, 2 = long) */
393 16, /* bitsize */
394 FALSE, /* pc_relative */
395 0, /* bitpos */
396 complain_overflow_signed, /* complain_on_overflow */
397 _bfd_mips_elf_generic_reloc, /* special_function */
398 "R_MIPS_GOT_OFST", /* name */
399 TRUE, /* partial_inplace */
400 0x0000ffff, /* src_mask */
401 0x0000ffff, /* dst_mask */
402 FALSE), /* pcrel_offset */
403
404 /* High 16 bits of displacement in global offset table. */
405 HOWTO (R_MIPS_GOT_HI16, /* type */
406 0, /* rightshift */
407 2, /* size (0 = byte, 1 = short, 2 = long) */
408 16, /* bitsize */
409 FALSE, /* pc_relative */
410 0, /* bitpos */
411 complain_overflow_dont, /* complain_on_overflow */
412 _bfd_mips_elf_generic_reloc, /* special_function */
413 "R_MIPS_GOT_HI16", /* name */
414 TRUE, /* partial_inplace */
415 0x0000ffff, /* src_mask */
416 0x0000ffff, /* dst_mask */
417 FALSE), /* pcrel_offset */
418
419 /* Low 16 bits of displacement in global offset table. */
420 HOWTO (R_MIPS_GOT_LO16, /* type */
421 0, /* rightshift */
422 2, /* size (0 = byte, 1 = short, 2 = long) */
423 16, /* bitsize */
424 FALSE, /* pc_relative */
425 0, /* bitpos */
426 complain_overflow_dont, /* complain_on_overflow */
427 _bfd_mips_elf_generic_reloc, /* special_function */
428 "R_MIPS_GOT_LO16", /* name */
429 TRUE, /* partial_inplace */
430 0x0000ffff, /* src_mask */
431 0x0000ffff, /* dst_mask */
432 FALSE), /* pcrel_offset */
433
434 /* 64 bit subtraction. Used in the N32 ABI. */
435 HOWTO (R_MIPS_SUB, /* type */
436 0, /* rightshift */
437 4, /* size (0 = byte, 1 = short, 2 = long) */
438 64, /* bitsize */
439 FALSE, /* pc_relative */
440 0, /* bitpos */
441 complain_overflow_dont, /* complain_on_overflow */
442 _bfd_mips_elf_generic_reloc, /* special_function */
443 "R_MIPS_SUB", /* name */
444 TRUE, /* partial_inplace */
445 MINUS_ONE, /* src_mask */
446 MINUS_ONE, /* dst_mask */
447 FALSE), /* pcrel_offset */
448
449 /* Used to cause the linker to insert and delete instructions? */
450 EMPTY_HOWTO (R_MIPS_INSERT_A),
451 EMPTY_HOWTO (R_MIPS_INSERT_B),
452 EMPTY_HOWTO (R_MIPS_DELETE),
453
454 /* Get the higher value of a 64 bit addend. */
455 HOWTO (R_MIPS_HIGHER, /* type */
456 0, /* rightshift */
457 2, /* size (0 = byte, 1 = short, 2 = long) */
458 16, /* bitsize */
459 FALSE, /* pc_relative */
460 0, /* bitpos */
461 complain_overflow_dont, /* complain_on_overflow */
462 _bfd_mips_elf_generic_reloc, /* special_function */
463 "R_MIPS_HIGHER", /* name */
464 TRUE, /* partial_inplace */
465 0x0000ffff, /* src_mask */
466 0x0000ffff, /* dst_mask */
467 FALSE), /* pcrel_offset */
468
469 /* Get the highest value of a 64 bit addend. */
470 HOWTO (R_MIPS_HIGHEST, /* type */
471 0, /* rightshift */
472 2, /* size (0 = byte, 1 = short, 2 = long) */
473 16, /* bitsize */
474 FALSE, /* pc_relative */
475 0, /* bitpos */
476 complain_overflow_dont, /* complain_on_overflow */
477 _bfd_mips_elf_generic_reloc, /* special_function */
478 "R_MIPS_HIGHEST", /* name */
479 TRUE, /* partial_inplace */
480 0x0000ffff, /* src_mask */
481 0x0000ffff, /* dst_mask */
482 FALSE), /* pcrel_offset */
483
484 /* High 16 bits of displacement in global offset table. */
485 HOWTO (R_MIPS_CALL_HI16, /* type */
486 0, /* rightshift */
487 2, /* size (0 = byte, 1 = short, 2 = long) */
488 16, /* bitsize */
489 FALSE, /* pc_relative */
490 0, /* bitpos */
491 complain_overflow_dont, /* complain_on_overflow */
492 _bfd_mips_elf_generic_reloc, /* special_function */
493 "R_MIPS_CALL_HI16", /* name */
494 TRUE, /* partial_inplace */
495 0x0000ffff, /* src_mask */
496 0x0000ffff, /* dst_mask */
497 FALSE), /* pcrel_offset */
498
499 /* Low 16 bits of displacement in global offset table. */
500 HOWTO (R_MIPS_CALL_LO16, /* type */
501 0, /* rightshift */
502 2, /* size (0 = byte, 1 = short, 2 = long) */
503 16, /* bitsize */
504 FALSE, /* pc_relative */
505 0, /* bitpos */
506 complain_overflow_dont, /* complain_on_overflow */
507 _bfd_mips_elf_generic_reloc, /* special_function */
508 "R_MIPS_CALL_LO16", /* name */
509 TRUE, /* partial_inplace */
510 0x0000ffff, /* src_mask */
511 0x0000ffff, /* dst_mask */
512 FALSE), /* pcrel_offset */
513
514 /* Section displacement. */
515 HOWTO (R_MIPS_SCN_DISP, /* type */
516 0, /* rightshift */
517 2, /* size (0 = byte, 1 = short, 2 = long) */
518 32, /* bitsize */
519 FALSE, /* pc_relative */
520 0, /* bitpos */
521 complain_overflow_dont, /* complain_on_overflow */
522 _bfd_mips_elf_generic_reloc, /* special_function */
523 "R_MIPS_SCN_DISP", /* name */
524 TRUE, /* partial_inplace */
525 0xffffffff, /* src_mask */
526 0xffffffff, /* dst_mask */
527 FALSE), /* pcrel_offset */
528
529 EMPTY_HOWTO (R_MIPS_REL16),
530 EMPTY_HOWTO (R_MIPS_ADD_IMMEDIATE),
531 EMPTY_HOWTO (R_MIPS_PJUMP),
532 EMPTY_HOWTO (R_MIPS_RELGOT),
533
534 /* Protected jump conversion. This is an optimization hint. No
535 relocation is required for correctness. */
536 HOWTO (R_MIPS_JALR, /* type */
537 0, /* rightshift */
538 2, /* size (0 = byte, 1 = short, 2 = long) */
539 32, /* bitsize */
540 FALSE, /* pc_relative */
541 0, /* bitpos */
542 complain_overflow_dont, /* complain_on_overflow */
543 _bfd_mips_elf_generic_reloc, /* special_function */
544 "R_MIPS_JALR", /* name */
545 FALSE, /* partial_inplace */
546 0x00000000, /* src_mask */
547 0x00000000, /* dst_mask */
548 FALSE), /* pcrel_offset */
549
550 /* TLS GD/LD dynamic relocations. */
551 HOWTO (R_MIPS_TLS_DTPMOD32, /* type */
552 0, /* rightshift */
553 2, /* size (0 = byte, 1 = short, 2 = long) */
554 32, /* bitsize */
555 FALSE, /* pc_relative */
556 0, /* bitpos */
557 complain_overflow_dont, /* complain_on_overflow */
558 _bfd_mips_elf_generic_reloc, /* special_function */
559 "R_MIPS_TLS_DTPMOD32", /* name */
560 TRUE, /* partial_inplace */
561 0xffffffff, /* src_mask */
562 0xffffffff, /* dst_mask */
563 FALSE), /* pcrel_offset */
564
565 HOWTO (R_MIPS_TLS_DTPREL32, /* type */
566 0, /* rightshift */
567 2, /* size (0 = byte, 1 = short, 2 = long) */
568 32, /* bitsize */
569 FALSE, /* pc_relative */
570 0, /* bitpos */
571 complain_overflow_dont, /* complain_on_overflow */
572 _bfd_mips_elf_generic_reloc, /* special_function */
573 "R_MIPS_TLS_DTPREL32", /* name */
574 TRUE, /* partial_inplace */
575 0xffffffff, /* src_mask */
576 0xffffffff, /* dst_mask */
577 FALSE), /* pcrel_offset */
578
579 EMPTY_HOWTO (R_MIPS_TLS_DTPMOD64),
580 EMPTY_HOWTO (R_MIPS_TLS_DTPREL64),
581
582 /* TLS general dynamic variable reference. */
583 HOWTO (R_MIPS_TLS_GD, /* type */
584 0, /* rightshift */
585 2, /* size (0 = byte, 1 = short, 2 = long) */
586 16, /* bitsize */
587 FALSE, /* pc_relative */
588 0, /* bitpos */
589 complain_overflow_signed, /* complain_on_overflow */
590 _bfd_mips_elf_generic_reloc, /* special_function */
591 "R_MIPS_TLS_GD", /* name */
592 TRUE, /* partial_inplace */
593 0x0000ffff, /* src_mask */
594 0x0000ffff, /* dst_mask */
595 FALSE), /* pcrel_offset */
596
597 /* TLS local dynamic variable reference. */
598 HOWTO (R_MIPS_TLS_LDM, /* type */
599 0, /* rightshift */
600 2, /* size (0 = byte, 1 = short, 2 = long) */
601 16, /* bitsize */
602 FALSE, /* pc_relative */
603 0, /* bitpos */
604 complain_overflow_signed, /* complain_on_overflow */
605 _bfd_mips_elf_generic_reloc, /* special_function */
606 "R_MIPS_TLS_LDM", /* name */
607 TRUE, /* partial_inplace */
608 0x0000ffff, /* src_mask */
609 0x0000ffff, /* dst_mask */
610 FALSE), /* pcrel_offset */
611
612 /* TLS local dynamic offset. */
613 HOWTO (R_MIPS_TLS_DTPREL_HI16, /* type */
614 0, /* rightshift */
615 2, /* size (0 = byte, 1 = short, 2 = long) */
616 16, /* bitsize */
617 FALSE, /* pc_relative */
618 0, /* bitpos */
619 complain_overflow_signed, /* complain_on_overflow */
620 _bfd_mips_elf_generic_reloc, /* special_function */
621 "R_MIPS_TLS_DTPREL_HI16", /* name */
622 TRUE, /* partial_inplace */
623 0x0000ffff, /* src_mask */
624 0x0000ffff, /* dst_mask */
625 FALSE), /* pcrel_offset */
626
627 /* TLS local dynamic offset. */
628 HOWTO (R_MIPS_TLS_DTPREL_LO16, /* type */
629 0, /* rightshift */
630 2, /* size (0 = byte, 1 = short, 2 = long) */
631 16, /* bitsize */
632 FALSE, /* pc_relative */
633 0, /* bitpos */
634 complain_overflow_signed, /* complain_on_overflow */
635 _bfd_mips_elf_generic_reloc, /* special_function */
636 "R_MIPS_TLS_DTPREL_LO16", /* name */
637 TRUE, /* partial_inplace */
638 0x0000ffff, /* src_mask */
639 0x0000ffff, /* dst_mask */
640 FALSE), /* pcrel_offset */
641
642 /* TLS thread pointer offset. */
643 HOWTO (R_MIPS_TLS_GOTTPREL, /* type */
644 0, /* rightshift */
645 2, /* size (0 = byte, 1 = short, 2 = long) */
646 16, /* bitsize */
647 FALSE, /* pc_relative */
648 0, /* bitpos */
649 complain_overflow_signed, /* complain_on_overflow */
650 _bfd_mips_elf_generic_reloc, /* special_function */
651 "R_MIPS_TLS_GOTTPREL", /* name */
652 TRUE, /* partial_inplace */
653 0x0000ffff, /* src_mask */
654 0x0000ffff, /* dst_mask */
655 FALSE), /* pcrel_offset */
656
657 /* TLS IE dynamic relocations. */
658 HOWTO (R_MIPS_TLS_TPREL32, /* type */
659 0, /* rightshift */
660 2, /* size (0 = byte, 1 = short, 2 = long) */
661 32, /* bitsize */
662 FALSE, /* pc_relative */
663 0, /* bitpos */
664 complain_overflow_dont, /* complain_on_overflow */
665 _bfd_mips_elf_generic_reloc, /* special_function */
666 "R_MIPS_TLS_TPREL32", /* name */
667 TRUE, /* partial_inplace */
668 0xffffffff, /* src_mask */
669 0xffffffff, /* dst_mask */
670 FALSE), /* pcrel_offset */
671
672 EMPTY_HOWTO (R_MIPS_TLS_TPREL64),
673
674 /* TLS thread pointer offset. */
675 HOWTO (R_MIPS_TLS_TPREL_HI16, /* type */
676 0, /* rightshift */
677 2, /* size (0 = byte, 1 = short, 2 = long) */
678 16, /* bitsize */
679 FALSE, /* pc_relative */
680 0, /* bitpos */
681 complain_overflow_signed, /* complain_on_overflow */
682 _bfd_mips_elf_generic_reloc, /* special_function */
683 "R_MIPS_TLS_TPREL_HI16", /* name */
684 TRUE, /* partial_inplace */
685 0x0000ffff, /* src_mask */
686 0x0000ffff, /* dst_mask */
687 FALSE), /* pcrel_offset */
688
689 /* TLS thread pointer offset. */
690 HOWTO (R_MIPS_TLS_TPREL_LO16, /* type */
691 0, /* rightshift */
692 2, /* size (0 = byte, 1 = short, 2 = long) */
693 16, /* bitsize */
694 FALSE, /* pc_relative */
695 0, /* bitpos */
696 complain_overflow_signed, /* complain_on_overflow */
697 _bfd_mips_elf_generic_reloc, /* special_function */
698 "R_MIPS_TLS_TPREL_LO16", /* name */
699 TRUE, /* partial_inplace */
700 0x0000ffff, /* src_mask */
701 0x0000ffff, /* dst_mask */
702 FALSE), /* pcrel_offset */
703
704 /* 32 bit relocation with no addend. */
705 HOWTO (R_MIPS_GLOB_DAT, /* type */
706 0, /* rightshift */
707 2, /* size (0 = byte, 1 = short, 2 = long) */
708 32, /* bitsize */
709 FALSE, /* pc_relative */
710 0, /* bitpos */
711 complain_overflow_dont, /* complain_on_overflow */
712 _bfd_mips_elf_generic_reloc, /* special_function */
713 "R_MIPS_GLOB_DAT", /* name */
714 FALSE, /* partial_inplace */
715 0x0, /* src_mask */
716 0xffffffff, /* dst_mask */
717 FALSE), /* pcrel_offset */
718 };
719
720 /* The reloc used for BFD_RELOC_CTOR when doing a 64 bit link. This
721 is a hack to make the linker think that we need 64 bit values. */
722 static reloc_howto_type elf_mips_ctor64_howto =
723 HOWTO (R_MIPS_64, /* type */
724 0, /* rightshift */
725 4, /* size (0 = byte, 1 = short, 2 = long) */
726 32, /* bitsize */
727 FALSE, /* pc_relative */
728 0, /* bitpos */
729 complain_overflow_signed, /* complain_on_overflow */
730 mips32_64bit_reloc, /* special_function */
731 "R_MIPS_64", /* name */
732 TRUE, /* partial_inplace */
733 0xffffffff, /* src_mask */
734 0xffffffff, /* dst_mask */
735 FALSE); /* pcrel_offset */
736
737 static reloc_howto_type elf_mips16_howto_table_rel[] =
738 {
739 /* The reloc used for the mips16 jump instruction. */
740 HOWTO (R_MIPS16_26, /* type */
741 2, /* rightshift */
742 2, /* size (0 = byte, 1 = short, 2 = long) */
743 26, /* bitsize */
744 FALSE, /* pc_relative */
745 0, /* bitpos */
746 complain_overflow_dont, /* complain_on_overflow */
747 /* This needs complex overflow
748 detection, because the upper four
749 bits must match the PC. */
750 _bfd_mips_elf_generic_reloc, /* special_function */
751 "R_MIPS16_26", /* name */
752 TRUE, /* partial_inplace */
753 0x3ffffff, /* src_mask */
754 0x3ffffff, /* dst_mask */
755 FALSE), /* pcrel_offset */
756
757 /* The reloc used for the mips16 gprel instruction. */
758 HOWTO (R_MIPS16_GPREL, /* type */
759 0, /* rightshift */
760 2, /* size (0 = byte, 1 = short, 2 = long) */
761 16, /* bitsize */
762 FALSE, /* pc_relative */
763 0, /* bitpos */
764 complain_overflow_signed, /* complain_on_overflow */
765 mips16_gprel_reloc, /* special_function */
766 "R_MIPS16_GPREL", /* name */
767 TRUE, /* partial_inplace */
768 0x0000ffff, /* src_mask */
769 0x0000ffff, /* dst_mask */
770 FALSE), /* pcrel_offset */
771
772 /* A placeholder for MIPS16 reference to global offset table. */
773 EMPTY_HOWTO (R_MIPS16_GOT16),
774
775 /* A placeholder for MIPS16 16 bit call through global offset table. */
776 EMPTY_HOWTO (R_MIPS16_CALL16),
777
778 /* MIPS16 high 16 bits of symbol value. */
779 HOWTO (R_MIPS16_HI16, /* type */
780 16, /* rightshift */
781 2, /* size (0 = byte, 1 = short, 2 = long) */
782 16, /* bitsize */
783 FALSE, /* pc_relative */
784 0, /* bitpos */
785 complain_overflow_dont, /* complain_on_overflow */
786 _bfd_mips_elf_hi16_reloc, /* special_function */
787 "R_MIPS16_HI16", /* name */
788 TRUE, /* partial_inplace */
789 0x0000ffff, /* src_mask */
790 0x0000ffff, /* dst_mask */
791 FALSE), /* pcrel_offset */
792
793 /* MIPS16 low 16 bits of symbol value. */
794 HOWTO (R_MIPS16_LO16, /* type */
795 0, /* rightshift */
796 2, /* size (0 = byte, 1 = short, 2 = long) */
797 16, /* bitsize */
798 FALSE, /* pc_relative */
799 0, /* bitpos */
800 complain_overflow_dont, /* complain_on_overflow */
801 _bfd_mips_elf_lo16_reloc, /* special_function */
802 "R_MIPS16_LO16", /* name */
803 TRUE, /* partial_inplace */
804 0x0000ffff, /* src_mask */
805 0x0000ffff, /* dst_mask */
806 FALSE), /* pcrel_offset */
807 };
808
809 /* 16 bit offset for pc-relative branches. */
810 static reloc_howto_type elf_mips_gnu_rel16_s2 =
811 HOWTO (R_MIPS_GNU_REL16_S2, /* type */
812 2, /* rightshift */
813 2, /* size (0 = byte, 1 = short, 2 = long) */
814 16, /* bitsize */
815 TRUE, /* pc_relative */
816 0, /* bitpos */
817 complain_overflow_signed, /* complain_on_overflow */
818 _bfd_mips_elf_generic_reloc, /* special_function */
819 "R_MIPS_GNU_REL16_S2", /* name */
820 TRUE, /* partial_inplace */
821 0xffff, /* src_mask */
822 0xffff, /* dst_mask */
823 TRUE); /* pcrel_offset */
824
825 /* 32 bit pc-relative. This was a GNU extension used by embedded-PIC.
826 It was co-opted by mips-linux for exception-handling data. It is no
827 longer used, but should continue to be supported by the linker for
828 backward compatibility. (GCC stopped using it in May, 2004.) */
829 static reloc_howto_type elf_mips_gnu_pcrel32 =
830 HOWTO (R_MIPS_PC32, /* type */
831 0, /* rightshift */
832 2, /* size (0 = byte, 1 = short, 2 = long) */
833 32, /* bitsize */
834 TRUE, /* pc_relative */
835 0, /* bitpos */
836 complain_overflow_signed, /* complain_on_overflow */
837 _bfd_mips_elf_generic_reloc, /* special_function */
838 "R_MIPS_PC32", /* name */
839 TRUE, /* partial_inplace */
840 0xffffffff, /* src_mask */
841 0xffffffff, /* dst_mask */
842 TRUE); /* pcrel_offset */
843
844 /* GNU extension to record C++ vtable hierarchy */
845 static reloc_howto_type elf_mips_gnu_vtinherit_howto =
846 HOWTO (R_MIPS_GNU_VTINHERIT, /* type */
847 0, /* rightshift */
848 2, /* size (0 = byte, 1 = short, 2 = long) */
849 0, /* bitsize */
850 FALSE, /* pc_relative */
851 0, /* bitpos */
852 complain_overflow_dont, /* complain_on_overflow */
853 NULL, /* special_function */
854 "R_MIPS_GNU_VTINHERIT", /* name */
855 FALSE, /* partial_inplace */
856 0, /* src_mask */
857 0, /* dst_mask */
858 FALSE); /* pcrel_offset */
859
860 /* GNU extension to record C++ vtable member usage */
861 static reloc_howto_type elf_mips_gnu_vtentry_howto =
862 HOWTO (R_MIPS_GNU_VTENTRY, /* type */
863 0, /* rightshift */
864 2, /* size (0 = byte, 1 = short, 2 = long) */
865 0, /* bitsize */
866 FALSE, /* pc_relative */
867 0, /* bitpos */
868 complain_overflow_dont, /* complain_on_overflow */
869 _bfd_elf_rel_vtable_reloc_fn, /* special_function */
870 "R_MIPS_GNU_VTENTRY", /* name */
871 FALSE, /* partial_inplace */
872 0, /* src_mask */
873 0, /* dst_mask */
874 FALSE); /* pcrel_offset */
875
876 /* Set the GP value for OUTPUT_BFD. Returns FALSE if this is a
877 dangerous relocation. */
878
879 static bfd_boolean
mips_elf_assign_gp(bfd * output_bfd,bfd_vma * pgp)880 mips_elf_assign_gp (bfd *output_bfd, bfd_vma *pgp)
881 {
882 unsigned int count;
883 asymbol **sym;
884 unsigned int i;
885
886 /* If we've already figured out what GP will be, just return it. */
887 *pgp = _bfd_get_gp_value (output_bfd);
888 if (*pgp)
889 return TRUE;
890
891 count = bfd_get_symcount (output_bfd);
892 sym = bfd_get_outsymbols (output_bfd);
893
894 /* The linker script will have created a symbol named `_gp' with the
895 appropriate value. */
896 if (sym == NULL)
897 i = count;
898 else
899 {
900 for (i = 0; i < count; i++, sym++)
901 {
902 register const char *name;
903
904 name = bfd_asymbol_name (*sym);
905 if (*name == '_' && strcmp (name, "_gp") == 0)
906 {
907 *pgp = bfd_asymbol_value (*sym);
908 _bfd_set_gp_value (output_bfd, *pgp);
909 break;
910 }
911 }
912 }
913
914 if (i >= count)
915 {
916 /* Only get the error once. */
917 *pgp = 4;
918 _bfd_set_gp_value (output_bfd, *pgp);
919 return FALSE;
920 }
921
922 return TRUE;
923 }
924
925 /* We have to figure out the gp value, so that we can adjust the
926 symbol value correctly. We look up the symbol _gp in the output
927 BFD. If we can't find it, we're stuck. We cache it in the ELF
928 target data. We don't need to adjust the symbol value for an
929 external symbol if we are producing relocatable output. */
930
931 static bfd_reloc_status_type
mips_elf_final_gp(bfd * output_bfd,asymbol * symbol,bfd_boolean relocatable,char ** error_message,bfd_vma * pgp)932 mips_elf_final_gp (bfd *output_bfd, asymbol *symbol, bfd_boolean relocatable,
933 char **error_message, bfd_vma *pgp)
934 {
935 if (bfd_is_und_section (symbol->section)
936 && ! relocatable)
937 {
938 *pgp = 0;
939 return bfd_reloc_undefined;
940 }
941
942 *pgp = _bfd_get_gp_value (output_bfd);
943 if (*pgp == 0
944 && (! relocatable
945 || (symbol->flags & BSF_SECTION_SYM) != 0))
946 {
947 if (relocatable)
948 {
949 /* Make up a value. */
950 *pgp = symbol->section->output_section->vma + 0x4000;
951 _bfd_set_gp_value (output_bfd, *pgp);
952 }
953 else if (!mips_elf_assign_gp (output_bfd, pgp))
954 {
955 *error_message =
956 (char *) _("GP relative relocation when _gp not defined");
957 return bfd_reloc_dangerous;
958 }
959 }
960
961 return bfd_reloc_ok;
962 }
963
964 /* Do a R_MIPS_GPREL16 relocation. This is a 16 bit value which must
965 become the offset from the gp register. This function also handles
966 R_MIPS_LITERAL relocations, although those can be handled more
967 cleverly because the entries in the .lit8 and .lit4 sections can be
968 merged. */
969
970 bfd_reloc_status_type
_bfd_mips_elf32_gprel16_reloc(bfd * abfd,arelent * reloc_entry,asymbol * symbol,void * data,asection * input_section,bfd * output_bfd,char ** error_message)971 _bfd_mips_elf32_gprel16_reloc (bfd *abfd, arelent *reloc_entry,
972 asymbol *symbol, void *data,
973 asection *input_section, bfd *output_bfd,
974 char **error_message)
975 {
976 bfd_boolean relocatable;
977 bfd_reloc_status_type ret;
978 bfd_vma gp;
979
980 /* R_MIPS_LITERAL relocations are defined for local symbols only. */
981 if (reloc_entry->howto->type == R_MIPS_LITERAL
982 && output_bfd != NULL
983 && (symbol->flags & BSF_SECTION_SYM) == 0
984 && (symbol->flags & BSF_LOCAL) != 0)
985 {
986 *error_message = (char *)
987 _("literal relocation occurs for an external symbol");
988 return bfd_reloc_outofrange;
989 }
990
991 if (output_bfd != NULL)
992 relocatable = TRUE;
993 else
994 {
995 relocatable = FALSE;
996 output_bfd = symbol->section->output_section->owner;
997 }
998
999 ret = mips_elf_final_gp (output_bfd, symbol, relocatable, error_message,
1000 &gp);
1001 if (ret != bfd_reloc_ok)
1002 return ret;
1003
1004 return _bfd_mips_elf_gprel16_with_gp (abfd, symbol, reloc_entry,
1005 input_section, relocatable,
1006 data, gp);
1007 }
1008
1009 /* Do a R_MIPS_GPREL32 relocation. This is a 32 bit value which must
1010 become the offset from the gp register. */
1011
1012 static bfd_reloc_status_type
mips_elf_gprel32_reloc(bfd * abfd,arelent * reloc_entry,asymbol * symbol,void * data,asection * input_section,bfd * output_bfd,char ** error_message)1013 mips_elf_gprel32_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
1014 void *data, asection *input_section, bfd *output_bfd,
1015 char **error_message)
1016 {
1017 bfd_boolean relocatable;
1018 bfd_reloc_status_type ret;
1019 bfd_vma gp;
1020
1021 /* R_MIPS_GPREL32 relocations are defined for local symbols only. */
1022 if (output_bfd != NULL
1023 && (symbol->flags & BSF_SECTION_SYM) == 0
1024 && (symbol->flags & BSF_LOCAL) != 0)
1025 {
1026 *error_message = (char *)
1027 _("32bits gp relative relocation occurs for an external symbol");
1028 return bfd_reloc_outofrange;
1029 }
1030
1031 if (output_bfd != NULL)
1032 relocatable = TRUE;
1033 else
1034 {
1035 relocatable = FALSE;
1036 output_bfd = symbol->section->output_section->owner;
1037 }
1038
1039 ret = mips_elf_final_gp (output_bfd, symbol, relocatable,
1040 error_message, &gp);
1041 if (ret != bfd_reloc_ok)
1042 return ret;
1043
1044 return gprel32_with_gp (abfd, symbol, reloc_entry, input_section,
1045 relocatable, data, gp);
1046 }
1047
1048 static bfd_reloc_status_type
gprel32_with_gp(bfd * abfd,asymbol * symbol,arelent * reloc_entry,asection * input_section,bfd_boolean relocatable,void * data,bfd_vma gp)1049 gprel32_with_gp (bfd *abfd, asymbol *symbol, arelent *reloc_entry,
1050 asection *input_section, bfd_boolean relocatable,
1051 void *data, bfd_vma gp)
1052 {
1053 bfd_vma relocation;
1054 bfd_vma val;
1055
1056 if (bfd_is_com_section (symbol->section))
1057 relocation = 0;
1058 else
1059 relocation = symbol->value;
1060
1061 relocation += symbol->section->output_section->vma;
1062 relocation += symbol->section->output_offset;
1063
1064 if (reloc_entry->address > bfd_get_section_limit (abfd, input_section))
1065 return bfd_reloc_outofrange;
1066
1067 /* Set val to the offset into the section or symbol. */
1068 val = reloc_entry->addend;
1069
1070 if (reloc_entry->howto->partial_inplace)
1071 val += bfd_get_32 (abfd, (bfd_byte *) data + reloc_entry->address);
1072
1073 /* Adjust val for the final section location and GP value. If we
1074 are producing relocatable output, we don't want to do this for
1075 an external symbol. */
1076 if (! relocatable
1077 || (symbol->flags & BSF_SECTION_SYM) != 0)
1078 val += relocation - gp;
1079
1080 if (reloc_entry->howto->partial_inplace)
1081 bfd_put_32 (abfd, val, (bfd_byte *) data + reloc_entry->address);
1082 else
1083 reloc_entry->addend = val;
1084
1085 if (relocatable)
1086 reloc_entry->address += input_section->output_offset;
1087
1088 return bfd_reloc_ok;
1089 }
1090
1091 /* Handle a 64 bit reloc in a 32 bit MIPS ELF file. These are
1092 generated when addresses are 64 bits. The upper 32 bits are a simple
1093 sign extension. */
1094
1095 static bfd_reloc_status_type
mips32_64bit_reloc(bfd * abfd,arelent * reloc_entry,asymbol * symbol ATTRIBUTE_UNUSED,void * data,asection * input_section,bfd * output_bfd,char ** error_message)1096 mips32_64bit_reloc (bfd *abfd, arelent *reloc_entry,
1097 asymbol *symbol ATTRIBUTE_UNUSED,
1098 void *data, asection *input_section,
1099 bfd *output_bfd, char **error_message)
1100 {
1101 bfd_reloc_status_type r;
1102 arelent reloc32;
1103 unsigned long val;
1104 bfd_size_type addr;
1105
1106 /* Do a normal 32 bit relocation on the lower 32 bits. */
1107 reloc32 = *reloc_entry;
1108 if (bfd_big_endian (abfd))
1109 reloc32.address += 4;
1110 reloc32.howto = &elf_mips_howto_table_rel[R_MIPS_32];
1111 r = bfd_perform_relocation (abfd, &reloc32, data, input_section,
1112 output_bfd, error_message);
1113
1114 /* Sign extend into the upper 32 bits. */
1115 val = bfd_get_32 (abfd, (bfd_byte *) data + reloc32.address);
1116 if ((val & 0x80000000) != 0)
1117 val = 0xffffffff;
1118 else
1119 val = 0;
1120 addr = reloc_entry->address;
1121 if (bfd_little_endian (abfd))
1122 addr += 4;
1123 bfd_put_32 (abfd, val, (bfd_byte *) data + addr);
1124
1125 return r;
1126 }
1127
1128 /* Handle a mips16 GP relative reloc. */
1129
1130 static bfd_reloc_status_type
mips16_gprel_reloc(bfd * abfd,arelent * reloc_entry,asymbol * symbol,void * data,asection * input_section,bfd * output_bfd,char ** error_message)1131 mips16_gprel_reloc (bfd *abfd, arelent *reloc_entry, asymbol *symbol,
1132 void *data, asection *input_section, bfd *output_bfd,
1133 char **error_message)
1134 {
1135 bfd_boolean relocatable;
1136 bfd_reloc_status_type ret;
1137 bfd_byte *location;
1138 bfd_vma gp;
1139
1140 /* If we're relocating, and this is an external symbol, we don't want
1141 to change anything. */
1142 if (output_bfd != NULL
1143 && (symbol->flags & BSF_SECTION_SYM) == 0
1144 && (symbol->flags & BSF_LOCAL) != 0)
1145 {
1146 reloc_entry->address += input_section->output_offset;
1147 return bfd_reloc_ok;
1148 }
1149
1150 if (output_bfd != NULL)
1151 relocatable = TRUE;
1152 else
1153 {
1154 relocatable = FALSE;
1155 output_bfd = symbol->section->output_section->owner;
1156 }
1157
1158 ret = mips_elf_final_gp (output_bfd, symbol, relocatable, error_message,
1159 &gp);
1160 if (ret != bfd_reloc_ok)
1161 return ret;
1162
1163 location = (bfd_byte *) data + reloc_entry->address;
1164 _bfd_mips16_elf_reloc_unshuffle (abfd, reloc_entry->howto->type, FALSE,
1165 location);
1166 ret = _bfd_mips_elf_gprel16_with_gp (abfd, symbol, reloc_entry,
1167 input_section, relocatable,
1168 data, gp);
1169 _bfd_mips16_elf_reloc_shuffle (abfd, reloc_entry->howto->type, !relocatable,
1170 location);
1171
1172 return ret;
1173 }
1174
1175 /* A mapping from BFD reloc types to MIPS ELF reloc types. */
1176
1177 struct elf_reloc_map {
1178 bfd_reloc_code_real_type bfd_val;
1179 enum elf_mips_reloc_type elf_val;
1180 };
1181
1182 static const struct elf_reloc_map mips_reloc_map[] =
1183 {
1184 { BFD_RELOC_NONE, R_MIPS_NONE },
1185 { BFD_RELOC_16, R_MIPS_16 },
1186 { BFD_RELOC_32, R_MIPS_32 },
1187 /* There is no BFD reloc for R_MIPS_REL32. */
1188 { BFD_RELOC_64, R_MIPS_64 },
1189 { BFD_RELOC_MIPS_JMP, R_MIPS_26 },
1190 { BFD_RELOC_HI16_S, R_MIPS_HI16 },
1191 { BFD_RELOC_LO16, R_MIPS_LO16 },
1192 { BFD_RELOC_GPREL16, R_MIPS_GPREL16 },
1193 { BFD_RELOC_MIPS_LITERAL, R_MIPS_LITERAL },
1194 { BFD_RELOC_MIPS_GOT16, R_MIPS_GOT16 },
1195 { BFD_RELOC_16_PCREL_S2, R_MIPS_PC16 },
1196 { BFD_RELOC_MIPS_CALL16, R_MIPS_CALL16 },
1197 { BFD_RELOC_GPREL32, R_MIPS_GPREL32 },
1198 { BFD_RELOC_MIPS_GOT_HI16, R_MIPS_GOT_HI16 },
1199 { BFD_RELOC_MIPS_GOT_LO16, R_MIPS_GOT_LO16 },
1200 { BFD_RELOC_MIPS_CALL_HI16, R_MIPS_CALL_HI16 },
1201 { BFD_RELOC_MIPS_CALL_LO16, R_MIPS_CALL_LO16 },
1202 { BFD_RELOC_MIPS_SUB, R_MIPS_SUB },
1203 { BFD_RELOC_MIPS_GOT_PAGE, R_MIPS_GOT_PAGE },
1204 { BFD_RELOC_MIPS_GOT_OFST, R_MIPS_GOT_OFST },
1205 { BFD_RELOC_MIPS_GOT_DISP, R_MIPS_GOT_DISP },
1206 { BFD_RELOC_MIPS_TLS_DTPMOD32, R_MIPS_TLS_DTPMOD32 },
1207 { BFD_RELOC_MIPS_TLS_DTPREL32, R_MIPS_TLS_DTPREL32 },
1208 { BFD_RELOC_MIPS_TLS_DTPMOD64, R_MIPS_TLS_DTPMOD64 },
1209 { BFD_RELOC_MIPS_TLS_DTPREL64, R_MIPS_TLS_DTPREL64 },
1210 { BFD_RELOC_MIPS_TLS_GD, R_MIPS_TLS_GD },
1211 { BFD_RELOC_MIPS_TLS_LDM, R_MIPS_TLS_LDM },
1212 { BFD_RELOC_MIPS_TLS_DTPREL_HI16, R_MIPS_TLS_DTPREL_HI16 },
1213 { BFD_RELOC_MIPS_TLS_DTPREL_LO16, R_MIPS_TLS_DTPREL_LO16 },
1214 { BFD_RELOC_MIPS_TLS_GOTTPREL, R_MIPS_TLS_GOTTPREL },
1215 { BFD_RELOC_MIPS_TLS_TPREL32, R_MIPS_TLS_TPREL32 },
1216 { BFD_RELOC_MIPS_TLS_TPREL64, R_MIPS_TLS_TPREL64 },
1217 { BFD_RELOC_MIPS_TLS_TPREL_HI16, R_MIPS_TLS_TPREL_HI16 },
1218 { BFD_RELOC_MIPS_TLS_TPREL_LO16, R_MIPS_TLS_TPREL_LO16 }
1219 };
1220
1221 static const struct elf_reloc_map mips16_reloc_map[] =
1222 {
1223 { BFD_RELOC_MIPS16_JMP, R_MIPS16_26 - R_MIPS16_min },
1224 { BFD_RELOC_MIPS16_GPREL, R_MIPS16_GPREL - R_MIPS16_min },
1225 { BFD_RELOC_MIPS16_HI16_S, R_MIPS16_HI16 - R_MIPS16_min },
1226 { BFD_RELOC_MIPS16_LO16, R_MIPS16_LO16 - R_MIPS16_min },
1227 };
1228
1229 /* Given a BFD reloc type, return a howto structure. */
1230
1231 static reloc_howto_type *
bfd_elf32_bfd_reloc_type_lookup(bfd * abfd,bfd_reloc_code_real_type code)1232 bfd_elf32_bfd_reloc_type_lookup (bfd *abfd, bfd_reloc_code_real_type code)
1233 {
1234 unsigned int i;
1235 reloc_howto_type *howto_table = elf_mips_howto_table_rel;
1236 reloc_howto_type *howto16_table = elf_mips16_howto_table_rel;
1237
1238 for (i = 0; i < sizeof (mips_reloc_map) / sizeof (struct elf_reloc_map);
1239 i++)
1240 {
1241 if (mips_reloc_map[i].bfd_val == code)
1242 return &howto_table[(int) mips_reloc_map[i].elf_val];
1243 }
1244
1245 for (i = 0; i < sizeof (mips16_reloc_map) / sizeof (struct elf_reloc_map);
1246 i++)
1247 {
1248 if (mips16_reloc_map[i].bfd_val == code)
1249 return &howto16_table[(int) mips16_reloc_map[i].elf_val];
1250 }
1251
1252 switch (code)
1253 {
1254 default:
1255 bfd_set_error (bfd_error_bad_value);
1256 return NULL;
1257
1258 case BFD_RELOC_CTOR:
1259 /* We need to handle BFD_RELOC_CTOR specially.
1260 Select the right relocation (R_MIPS_32 or R_MIPS_64) based on the
1261 size of addresses of the ABI. */
1262 if ((elf_elfheader (abfd)->e_flags & (E_MIPS_ABI_O64
1263 | E_MIPS_ABI_EABI64)) != 0)
1264 return &elf_mips_ctor64_howto;
1265 else
1266 return &howto_table[(int) R_MIPS_32];
1267
1268 case BFD_RELOC_VTABLE_INHERIT:
1269 return &elf_mips_gnu_vtinherit_howto;
1270 case BFD_RELOC_VTABLE_ENTRY:
1271 return &elf_mips_gnu_vtentry_howto;
1272 case BFD_RELOC_32_PCREL:
1273 return &elf_mips_gnu_pcrel32;
1274 }
1275 }
1276
1277 static reloc_howto_type *
bfd_elf32_bfd_reloc_name_lookup(bfd * abfd ATTRIBUTE_UNUSED,const char * r_name)1278 bfd_elf32_bfd_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
1279 const char *r_name)
1280 {
1281 unsigned int i;
1282
1283 for (i = 0;
1284 i < (sizeof (elf_mips_howto_table_rel)
1285 / sizeof (elf_mips_howto_table_rel[0]));
1286 i++)
1287 if (elf_mips_howto_table_rel[i].name != NULL
1288 && strcasecmp (elf_mips_howto_table_rel[i].name, r_name) == 0)
1289 return &elf_mips_howto_table_rel[i];
1290
1291 for (i = 0;
1292 i < (sizeof (elf_mips16_howto_table_rel)
1293 / sizeof (elf_mips16_howto_table_rel[0]));
1294 i++)
1295 if (elf_mips16_howto_table_rel[i].name != NULL
1296 && strcasecmp (elf_mips16_howto_table_rel[i].name, r_name) == 0)
1297 return &elf_mips16_howto_table_rel[i];
1298
1299 if (strcasecmp (elf_mips_gnu_pcrel32.name, r_name) == 0)
1300 return &elf_mips_gnu_pcrel32;
1301 if (strcasecmp (elf_mips_gnu_rel16_s2.name, r_name) == 0)
1302 return &elf_mips_gnu_rel16_s2;
1303 if (strcasecmp (elf_mips_gnu_vtinherit_howto.name, r_name) == 0)
1304 return &elf_mips_gnu_vtinherit_howto;
1305 if (strcasecmp (elf_mips_gnu_vtentry_howto.name, r_name) == 0)
1306 return &elf_mips_gnu_vtentry_howto;
1307
1308 return NULL;
1309 }
1310
1311 /* Given a MIPS Elf_Internal_Rel, fill in an arelent structure. */
1312
1313 static reloc_howto_type *
mips_elf32_rtype_to_howto(unsigned int r_type,bfd_boolean rela_p ATTRIBUTE_UNUSED)1314 mips_elf32_rtype_to_howto (unsigned int r_type,
1315 bfd_boolean rela_p ATTRIBUTE_UNUSED)
1316 {
1317 switch (r_type)
1318 {
1319 case R_MIPS_GNU_VTINHERIT:
1320 return &elf_mips_gnu_vtinherit_howto;
1321 case R_MIPS_GNU_VTENTRY:
1322 return &elf_mips_gnu_vtentry_howto;
1323 case R_MIPS_GNU_REL16_S2:
1324 return &elf_mips_gnu_rel16_s2;
1325 case R_MIPS_PC32:
1326 return &elf_mips_gnu_pcrel32;
1327 default:
1328 if (r_type >= R_MIPS16_min && r_type < R_MIPS16_max)
1329 return &elf_mips16_howto_table_rel[r_type - R_MIPS16_min];
1330 BFD_ASSERT (r_type < (unsigned int) R_MIPS_max);
1331 return &elf_mips_howto_table_rel[r_type];
1332 }
1333 }
1334
1335 /* Given a MIPS Elf_Internal_Rel, fill in an arelent structure. */
1336
1337 static void
mips_info_to_howto_rel(bfd * abfd,arelent * cache_ptr,Elf_Internal_Rela * dst)1338 mips_info_to_howto_rel (bfd *abfd, arelent *cache_ptr, Elf_Internal_Rela *dst)
1339 {
1340 const struct elf_backend_data *bed;
1341 unsigned int r_type;
1342
1343 r_type = ELF32_R_TYPE (dst->r_info);
1344 bed = get_elf_backend_data (abfd);
1345 cache_ptr->howto = bed->elf_backend_mips_rtype_to_howto (r_type, FALSE);
1346
1347 /* The addend for a GPREL16 or LITERAL relocation comes from the GP
1348 value for the object file. We get the addend now, rather than
1349 when we do the relocation, because the symbol manipulations done
1350 by the linker may cause us to lose track of the input BFD. */
1351 if (((*cache_ptr->sym_ptr_ptr)->flags & BSF_SECTION_SYM) != 0
1352 && (r_type == (unsigned int) R_MIPS_GPREL16
1353 || r_type == (unsigned int) R_MIPS_LITERAL))
1354 cache_ptr->addend = elf_gp (abfd);
1355 }
1356
1357 /* Given a MIPS Elf_Internal_Rela, fill in an arelent structure. */
1358
1359 static void
mips_info_to_howto_rela(bfd * abfd,arelent * cache_ptr,Elf_Internal_Rela * dst)1360 mips_info_to_howto_rela (bfd *abfd, arelent *cache_ptr, Elf_Internal_Rela *dst)
1361 {
1362 mips_info_to_howto_rel (abfd, cache_ptr, dst);
1363
1364 /* If we ever need to do any extra processing with dst->r_addend
1365 (the field omitted in an Elf_Internal_Rel) we can do it here. */
1366 }
1367
1368 /* Determine whether a symbol is global for the purposes of splitting
1369 the symbol table into global symbols and local symbols. At least
1370 on Irix 5, this split must be between section symbols and all other
1371 symbols. On most ELF targets the split is between static symbols
1372 and externally visible symbols. */
1373
1374 static bfd_boolean
mips_elf_sym_is_global(bfd * abfd ATTRIBUTE_UNUSED,asymbol * sym)1375 mips_elf_sym_is_global (bfd *abfd ATTRIBUTE_UNUSED, asymbol *sym)
1376 {
1377 if (SGI_COMPAT (abfd))
1378 return (sym->flags & BSF_SECTION_SYM) == 0;
1379 else
1380 return ((sym->flags & (BSF_GLOBAL | BSF_WEAK)) != 0
1381 || bfd_is_und_section (bfd_get_section (sym))
1382 || bfd_is_com_section (bfd_get_section (sym)));
1383 }
1384
1385 /* Set the right machine number for a MIPS ELF file. */
1386
1387 static bfd_boolean
mips_elf32_object_p(bfd * abfd)1388 mips_elf32_object_p (bfd *abfd)
1389 {
1390 unsigned long mach;
1391
1392 /* Irix 5 and 6 are broken. Object file symbol tables are not always
1393 sorted correctly such that local symbols precede global symbols,
1394 and the sh_info field in the symbol table is not always right. */
1395 if (SGI_COMPAT (abfd))
1396 elf_bad_symtab (abfd) = TRUE;
1397
1398 if (ABI_N32_P (abfd))
1399 return FALSE;
1400
1401 mach = _bfd_elf_mips_mach (elf_elfheader (abfd)->e_flags);
1402 bfd_default_set_arch_mach (abfd, bfd_arch_mips, mach);
1403
1404 return TRUE;
1405 }
1406
1407 /* MIPS ELF local labels start with '$', not 'L'. */
1408
1409 static bfd_boolean
mips_elf_is_local_label_name(bfd * abfd,const char * name)1410 mips_elf_is_local_label_name (bfd *abfd, const char *name)
1411 {
1412 if (name[0] == '$')
1413 return TRUE;
1414
1415 /* On Irix 6, the labels go back to starting with '.', so we accept
1416 the generic ELF local label syntax as well. */
1417 return _bfd_elf_is_local_label_name (abfd, name);
1418 }
1419
1420 /* Support for core dump NOTE sections. */
1421 static bfd_boolean
elf32_mips_grok_prstatus(bfd * abfd,Elf_Internal_Note * note)1422 elf32_mips_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
1423 {
1424 int offset;
1425 unsigned int size;
1426
1427 switch (note->descsz)
1428 {
1429 default:
1430 return FALSE;
1431
1432 case 256: /* Linux/MIPS */
1433 /* pr_cursig */
1434 elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
1435
1436 /* pr_pid */
1437 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 24);
1438
1439 /* pr_reg */
1440 offset = 72;
1441 size = 180;
1442
1443 break;
1444 }
1445
1446 /* Make a ".reg/999" section. */
1447 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
1448 size, note->descpos + offset);
1449 }
1450
1451 static bfd_boolean
elf32_mips_grok_psinfo(bfd * abfd,Elf_Internal_Note * note)1452 elf32_mips_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
1453 {
1454 switch (note->descsz)
1455 {
1456 default:
1457 return FALSE;
1458
1459 case 128: /* Linux/MIPS elf_prpsinfo */
1460 elf_tdata (abfd)->core_program
1461 = _bfd_elfcore_strndup (abfd, note->descdata + 32, 16);
1462 elf_tdata (abfd)->core_command
1463 = _bfd_elfcore_strndup (abfd, note->descdata + 48, 80);
1464 }
1465
1466 /* Note that for some reason, a spurious space is tacked
1467 onto the end of the args in some (at least one anyway)
1468 implementations, so strip it off if it exists. */
1469
1470 {
1471 char *command = elf_tdata (abfd)->core_command;
1472 int n = strlen (command);
1473
1474 if (0 < n && command[n - 1] == ' ')
1475 command[n - 1] = '\0';
1476 }
1477
1478 return TRUE;
1479 }
1480
1481 /* Depending on the target vector we generate some version of Irix
1482 executables or "normal" MIPS ELF ABI executables. */
1483 static irix_compat_t
elf32_mips_irix_compat(bfd * abfd)1484 elf32_mips_irix_compat (bfd *abfd)
1485 {
1486 if ((abfd->xvec == &bfd_elf32_bigmips_vec)
1487 || (abfd->xvec == &bfd_elf32_littlemips_vec))
1488 return ict_irix5;
1489 else
1490 return ict_none;
1491 }
1492
1493 /* ECOFF swapping routines. These are used when dealing with the
1494 .mdebug section, which is in the ECOFF debugging format. */
1495 static const struct ecoff_debug_swap mips_elf32_ecoff_debug_swap = {
1496 /* Symbol table magic number. */
1497 magicSym,
1498 /* Alignment of debugging information. E.g., 4. */
1499 4,
1500 /* Sizes of external symbolic information. */
1501 sizeof (struct hdr_ext),
1502 sizeof (struct dnr_ext),
1503 sizeof (struct pdr_ext),
1504 sizeof (struct sym_ext),
1505 sizeof (struct opt_ext),
1506 sizeof (struct fdr_ext),
1507 sizeof (struct rfd_ext),
1508 sizeof (struct ext_ext),
1509 /* Functions to swap in external symbolic data. */
1510 ecoff_swap_hdr_in,
1511 ecoff_swap_dnr_in,
1512 ecoff_swap_pdr_in,
1513 ecoff_swap_sym_in,
1514 ecoff_swap_opt_in,
1515 ecoff_swap_fdr_in,
1516 ecoff_swap_rfd_in,
1517 ecoff_swap_ext_in,
1518 _bfd_ecoff_swap_tir_in,
1519 _bfd_ecoff_swap_rndx_in,
1520 /* Functions to swap out external symbolic data. */
1521 ecoff_swap_hdr_out,
1522 ecoff_swap_dnr_out,
1523 ecoff_swap_pdr_out,
1524 ecoff_swap_sym_out,
1525 ecoff_swap_opt_out,
1526 ecoff_swap_fdr_out,
1527 ecoff_swap_rfd_out,
1528 ecoff_swap_ext_out,
1529 _bfd_ecoff_swap_tir_out,
1530 _bfd_ecoff_swap_rndx_out,
1531 /* Function to read in symbolic data. */
1532 _bfd_mips_elf_read_ecoff_info
1533 };
1534
1535 #define ELF_ARCH bfd_arch_mips
1536 #define ELF_MACHINE_CODE EM_MIPS
1537
1538 #define elf_backend_collect TRUE
1539 #define elf_backend_type_change_ok TRUE
1540 #define elf_backend_can_gc_sections TRUE
1541 #define elf_info_to_howto mips_info_to_howto_rela
1542 #define elf_info_to_howto_rel mips_info_to_howto_rel
1543 #define elf_backend_sym_is_global mips_elf_sym_is_global
1544 #define elf_backend_object_p mips_elf32_object_p
1545 #define elf_backend_symbol_processing _bfd_mips_elf_symbol_processing
1546 #define elf_backend_section_processing _bfd_mips_elf_section_processing
1547 #define elf_backend_section_from_shdr _bfd_mips_elf_section_from_shdr
1548 #define elf_backend_fake_sections _bfd_mips_elf_fake_sections
1549 #define elf_backend_section_from_bfd_section \
1550 _bfd_mips_elf_section_from_bfd_section
1551 #define elf_backend_add_symbol_hook _bfd_mips_elf_add_symbol_hook
1552 #define elf_backend_link_output_symbol_hook \
1553 _bfd_mips_elf_link_output_symbol_hook
1554 #define elf_backend_create_dynamic_sections \
1555 _bfd_mips_elf_create_dynamic_sections
1556 #define elf_backend_check_relocs _bfd_mips_elf_check_relocs
1557 #define elf_backend_merge_symbol_attribute \
1558 _bfd_mips_elf_merge_symbol_attribute
1559 #define elf_backend_adjust_dynamic_symbol \
1560 _bfd_mips_elf_adjust_dynamic_symbol
1561 #define elf_backend_always_size_sections \
1562 _bfd_mips_elf_always_size_sections
1563 #define elf_backend_size_dynamic_sections \
1564 _bfd_mips_elf_size_dynamic_sections
1565 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
1566 #define elf_backend_relocate_section _bfd_mips_elf_relocate_section
1567 #define elf_backend_finish_dynamic_symbol \
1568 _bfd_mips_elf_finish_dynamic_symbol
1569 #define elf_backend_finish_dynamic_sections \
1570 _bfd_mips_elf_finish_dynamic_sections
1571 #define elf_backend_final_write_processing \
1572 _bfd_mips_elf_final_write_processing
1573 #define elf_backend_additional_program_headers \
1574 _bfd_mips_elf_additional_program_headers
1575 #define elf_backend_modify_segment_map _bfd_mips_elf_modify_segment_map
1576 #define elf_backend_gc_mark_hook _bfd_mips_elf_gc_mark_hook
1577 #define elf_backend_gc_sweep_hook _bfd_mips_elf_gc_sweep_hook
1578 #define elf_backend_copy_indirect_symbol \
1579 _bfd_mips_elf_copy_indirect_symbol
1580 #define elf_backend_hide_symbol _bfd_mips_elf_hide_symbol
1581 #define elf_backend_grok_prstatus elf32_mips_grok_prstatus
1582 #define elf_backend_grok_psinfo elf32_mips_grok_psinfo
1583 #define elf_backend_ecoff_debug_swap &mips_elf32_ecoff_debug_swap
1584
1585 #define elf_backend_got_header_size (4 * MIPS_RESERVED_GOTNO)
1586 #define elf_backend_may_use_rel_p 1
1587 #define elf_backend_may_use_rela_p 0
1588 #define elf_backend_default_use_rela_p 0
1589 #define elf_backend_sign_extend_vma TRUE
1590
1591 #define elf_backend_discard_info _bfd_mips_elf_discard_info
1592 #define elf_backend_ignore_discarded_relocs \
1593 _bfd_mips_elf_ignore_discarded_relocs
1594 #define elf_backend_mips_irix_compat elf32_mips_irix_compat
1595 #define elf_backend_mips_rtype_to_howto mips_elf32_rtype_to_howto
1596 #define bfd_elf32_bfd_is_local_label_name \
1597 mips_elf_is_local_label_name
1598 #define bfd_elf32_find_nearest_line _bfd_mips_elf_find_nearest_line
1599 #define bfd_elf32_find_inliner_info _bfd_mips_elf_find_inliner_info
1600 #define bfd_elf32_new_section_hook _bfd_mips_elf_new_section_hook
1601 #define bfd_elf32_set_section_contents _bfd_mips_elf_set_section_contents
1602 #define bfd_elf32_bfd_get_relocated_section_contents \
1603 _bfd_elf_mips_get_relocated_section_contents
1604 #define bfd_elf32_bfd_link_hash_table_create \
1605 _bfd_mips_elf_link_hash_table_create
1606 #define bfd_elf32_bfd_final_link _bfd_mips_elf_final_link
1607 #define bfd_elf32_bfd_merge_private_bfd_data \
1608 _bfd_mips_elf_merge_private_bfd_data
1609 #define bfd_elf32_bfd_set_private_flags _bfd_mips_elf_set_private_flags
1610 #define bfd_elf32_bfd_print_private_bfd_data \
1611 _bfd_mips_elf_print_private_bfd_data
1612
1613 /* Support for SGI-ish mips targets. */
1614 #define TARGET_LITTLE_SYM bfd_elf32_littlemips_vec
1615 #define TARGET_LITTLE_NAME "elf32-littlemips"
1616 #define TARGET_BIG_SYM bfd_elf32_bigmips_vec
1617 #define TARGET_BIG_NAME "elf32-bigmips"
1618
1619 /* The SVR4 MIPS ABI says that this should be 0x10000, but Irix 5 uses
1620 a value of 0x1000, and we are compatible. */
1621 #define ELF_MAXPAGESIZE 0x1000
1622 #define ELF_COMMONPAGESIZE 0x1000
1623
1624 #include "elf32-target.h"
1625
1626 /* Support for traditional mips targets. */
1627 #undef TARGET_LITTLE_SYM
1628 #undef TARGET_LITTLE_NAME
1629 #undef TARGET_BIG_SYM
1630 #undef TARGET_BIG_NAME
1631
1632 #undef ELF_MAXPAGESIZE
1633 #undef ELF_COMMONPAGESIZE
1634
1635 #define TARGET_LITTLE_SYM bfd_elf32_tradlittlemips_vec
1636 #define TARGET_LITTLE_NAME "elf32-tradlittlemips"
1637 #define TARGET_BIG_SYM bfd_elf32_tradbigmips_vec
1638 #define TARGET_BIG_NAME "elf32-tradbigmips"
1639
1640 /* The MIPS ABI says at Page 5-1:
1641 Virtual addresses and file offsets for MIPS segments are congruent
1642 modulo 64 KByte (0x10000) or larger powers of 2. Because 64 KBytes
1643 is the maximum page size, the files are suitable for paging
1644 regardless of physical page size. */
1645 #define ELF_MAXPAGESIZE 0x10000
1646 #define ELF_COMMONPAGESIZE 0x1000
1647 #define elf32_bed elf32_tradbed
1648
1649 /* Include the target file again for this target. */
1650 #include "elf32-target.h"
1651
1652
1653 /* Specific to VxWorks. */
1654 static reloc_howto_type mips_vxworks_copy_howto_rela =
1655 HOWTO (R_MIPS_COPY, /* type */
1656 0, /* rightshift */
1657 2, /* size (0 = byte, 1 = short, 2 = long) */
1658 32, /* bitsize */
1659 FALSE, /* pc_relative */
1660 0, /* bitpos */
1661 complain_overflow_bitfield, /* complain_on_overflow */
1662 bfd_elf_generic_reloc, /* special_function */
1663 "R_MIPS_COPY", /* name */
1664 FALSE, /* partial_inplace */
1665 0x0, /* src_mask */
1666 0x0, /* dst_mask */
1667 FALSE); /* pcrel_offset */
1668
1669 /* Specific to VxWorks. */
1670 static reloc_howto_type mips_vxworks_jump_slot_howto_rela =
1671 HOWTO (R_MIPS_JUMP_SLOT, /* type */
1672 0, /* rightshift */
1673 2, /* size (0 = byte, 1 = short, 2 = long) */
1674 32, /* bitsize */
1675 FALSE, /* pc_relative */
1676 0, /* bitpos */
1677 complain_overflow_bitfield, /* complain_on_overflow */
1678 bfd_elf_generic_reloc, /* special_function */
1679 "R_MIPS_JUMP_SLOT", /* name */
1680 FALSE, /* partial_inplace */
1681 0x0, /* src_mask */
1682 0x0, /* dst_mask */
1683 FALSE); /* pcrel_offset */
1684
1685 /* Implement elf_backend_bfd_reloc_type_lookup for VxWorks. */
1686
1687 static reloc_howto_type *
mips_vxworks_bfd_reloc_type_lookup(bfd * abfd,bfd_reloc_code_real_type code)1688 mips_vxworks_bfd_reloc_type_lookup (bfd *abfd, bfd_reloc_code_real_type code)
1689 {
1690 switch (code)
1691 {
1692 case BFD_RELOC_MIPS_COPY:
1693 return &mips_vxworks_copy_howto_rela;
1694 case BFD_RELOC_MIPS_JUMP_SLOT:
1695 return &mips_vxworks_jump_slot_howto_rela;
1696 default:
1697 return bfd_elf32_bfd_reloc_type_lookup (abfd, code);
1698 }
1699 }
1700
1701 static reloc_howto_type *
mips_vxworks_bfd_reloc_name_lookup(bfd * abfd,const char * r_name)1702 mips_vxworks_bfd_reloc_name_lookup (bfd *abfd, const char *r_name)
1703 {
1704 if (strcasecmp (mips_vxworks_copy_howto_rela.name, r_name) == 0)
1705 return &mips_vxworks_copy_howto_rela;
1706 if (strcasecmp (mips_vxworks_jump_slot_howto_rela.name, r_name) == 0)
1707 return &mips_vxworks_jump_slot_howto_rela;
1708
1709 return bfd_elf32_bfd_reloc_name_lookup (abfd, r_name);
1710 }
1711
1712 /* Implement elf_backend_mips_rtype_to_lookup for VxWorks. */
1713
1714 static reloc_howto_type *
mips_vxworks_rtype_to_howto(unsigned int r_type,bfd_boolean rela_p)1715 mips_vxworks_rtype_to_howto (unsigned int r_type, bfd_boolean rela_p)
1716 {
1717 switch (r_type)
1718 {
1719 case R_MIPS_COPY:
1720 return &mips_vxworks_copy_howto_rela;
1721 case R_MIPS_JUMP_SLOT:
1722 return &mips_vxworks_jump_slot_howto_rela;
1723 default:
1724 return mips_elf32_rtype_to_howto (r_type, rela_p);
1725 }
1726 }
1727
1728 /* Implement elf_backend_final_write_processing for VxWorks. */
1729
1730 static void
mips_vxworks_final_write_processing(bfd * abfd,bfd_boolean linker)1731 mips_vxworks_final_write_processing (bfd *abfd, bfd_boolean linker)
1732 {
1733 _bfd_mips_elf_final_write_processing (abfd, linker);
1734 elf_vxworks_final_write_processing (abfd, linker);
1735 }
1736
1737 #undef TARGET_LITTLE_SYM
1738 #undef TARGET_LITTLE_NAME
1739 #undef TARGET_BIG_SYM
1740 #undef TARGET_BIG_NAME
1741
1742 #undef ELF_MAXPAGESIZE
1743 #undef ELF_COMMONPAGESIZE
1744
1745 #define TARGET_LITTLE_SYM bfd_elf32_littlemips_vxworks_vec
1746 #define TARGET_LITTLE_NAME "elf32-littlemips-vxworks"
1747 #define TARGET_BIG_SYM bfd_elf32_bigmips_vxworks_vec
1748 #define TARGET_BIG_NAME "elf32-bigmips-vxworks"
1749
1750 #undef elf32_bed
1751 #define elf32_bed elf32_mips_vxworks_bed
1752
1753 #define ELF_MAXPAGESIZE 0x1000
1754 #define ELF_COMMONPAGESIZE 0x1000
1755
1756 #undef elf_backend_want_got_plt
1757 #define elf_backend_want_got_plt 1
1758 #undef elf_backend_want_plt_sym
1759 #define elf_backend_want_plt_sym 1
1760 #undef elf_backend_got_symbol_offset
1761 #define elf_backend_got_symbol_offset 0
1762 #undef elf_backend_want_dynbss
1763 #define elf_backend_want_dynbss 1
1764 #undef elf_backend_may_use_rel_p
1765 #define elf_backend_may_use_rel_p 0
1766 #undef elf_backend_may_use_rela_p
1767 #define elf_backend_may_use_rela_p 1
1768 #undef elf_backend_default_use_rela_p
1769 #define elf_backend_default_use_rela_p 1
1770 #undef elf_backend_got_header_size
1771 #define elf_backend_got_header_size (4 * 3)
1772 #undef elf_backend_plt_readonly
1773 #define elf_backend_plt_readonly 1
1774
1775 #undef bfd_elf32_bfd_reloc_type_lookup
1776 #define bfd_elf32_bfd_reloc_type_lookup \
1777 mips_vxworks_bfd_reloc_type_lookup
1778 #undef bfd_elf32_bfd_reloc_name_lookup
1779 #define bfd_elf32_bfd_reloc_name_lookup \
1780 mips_vxworks_bfd_reloc_name_lookup
1781 #undef elf_backend_mips_rtype_to_howto
1782 #define elf_backend_mips_rtype_to_howto \
1783 mips_vxworks_rtype_to_howto
1784 #undef elf_backend_adjust_dynamic_symbol
1785 #define elf_backend_adjust_dynamic_symbol \
1786 _bfd_mips_vxworks_adjust_dynamic_symbol
1787 #undef elf_backend_finish_dynamic_symbol
1788 #define elf_backend_finish_dynamic_symbol \
1789 _bfd_mips_vxworks_finish_dynamic_symbol
1790 #undef bfd_elf32_bfd_link_hash_table_create
1791 #define bfd_elf32_bfd_link_hash_table_create \
1792 _bfd_mips_vxworks_link_hash_table_create
1793 #undef elf_backend_add_symbol_hook
1794 #define elf_backend_add_symbol_hook \
1795 elf_vxworks_add_symbol_hook
1796 #undef elf_backend_link_output_symbol_hook
1797 #define elf_backend_link_output_symbol_hook \
1798 elf_vxworks_link_output_symbol_hook
1799 #undef elf_backend_emit_relocs
1800 #define elf_backend_emit_relocs \
1801 elf_vxworks_emit_relocs
1802 #undef elf_backend_final_write_processing
1803 #define elf_backend_final_write_processing \
1804 mips_vxworks_final_write_processing
1805
1806 #undef elf_backend_additional_program_headers
1807 #undef elf_backend_modify_segment_map
1808 #undef elf_backend_symbol_processing
1809 /* NOTE: elf_backend_rela_normal is not defined for MIPS. */
1810
1811 #include "elf32-target.h"
1812