1 /* CRIS-specific support for 32-bit ELF.
2    Copyright 2000, 2001, 2002, 2003, 2004, 2005
3    Free Software Foundation, Inc.
4    Contributed by Axis Communications AB.
5    Written by Hans-Peter Nilsson, based on elf32-fr30.c
6    PIC and shlib bits based primarily on elf32-m68k.c and elf32-i386.c.
7 
8    This file is part of BFD, the Binary File Descriptor library.
9 
10    This program is free software; you can redistribute it and/or modify
11    it under the terms of the GNU General Public License as published by
12    the Free Software Foundation; either version 2 of the License, or
13    (at your option) any later version.
14 
15    This program is distributed in the hope that it will be useful,
16    but WITHOUT ANY WARRANTY; without even the implied warranty of
17    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
18    GNU General Public License for more details.
19 
20    You should have received a copy of the GNU General Public License
21    along with this program; if not, write to the Free Software
22    Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA.  */
23 
24 #include "bfd.h"
25 #include "sysdep.h"
26 #include "libbfd.h"
27 #include "elf-bfd.h"
28 #include "elf/cris.h"
29 
30 /* Forward declarations.  */
31 static reloc_howto_type * cris_reloc_type_lookup
32   PARAMS ((bfd *abfd, bfd_reloc_code_real_type code));
33 
34 static void cris_info_to_howto_rela
35   PARAMS ((bfd *, arelent *, Elf_Internal_Rela *));
36 
37 static bfd_reloc_status_type cris_elf_pcrel_reloc
38   PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
39 
40 static bfd_boolean cris_elf_grok_prstatus
41   PARAMS ((bfd *abfd, Elf_Internal_Note *note));
42 
43 static bfd_boolean cris_elf_grok_psinfo
44   PARAMS ((bfd *abfd, Elf_Internal_Note *note));
45 
46 static bfd_boolean cris_elf_relocate_section
47   PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *,
48 	   Elf_Internal_Rela *, Elf_Internal_Sym *, asection **));
49 
50 static bfd_reloc_status_type cris_final_link_relocate
51   PARAMS ((reloc_howto_type *, bfd *, asection *, bfd_byte *,
52 	   Elf_Internal_Rela *, bfd_vma));
53 
54 static bfd_boolean cris_elf_gc_sweep_hook
55   PARAMS ((bfd *, struct bfd_link_info *, asection *,
56 	   const Elf_Internal_Rela *));
57 
58 static asection * cris_elf_gc_mark_hook
59   PARAMS ((asection *, struct bfd_link_info *, Elf_Internal_Rela *,
60 	   struct elf_link_hash_entry *, Elf_Internal_Sym *));
61 
62 static bfd_boolean cris_elf_object_p PARAMS ((bfd *));
63 
64 static void cris_elf_final_write_processing PARAMS ((bfd *, bfd_boolean));
65 
66 static bfd_boolean cris_elf_set_mach_from_flags
67   PARAMS ((bfd *, unsigned long int));
68 
69 static bfd_boolean cris_elf_print_private_bfd_data PARAMS ((bfd *, PTR));
70 
71 static bfd_boolean cris_elf_merge_private_bfd_data PARAMS ((bfd *, bfd *));
72 static bfd_boolean cris_elf_copy_private_bfd_data PARAMS ((bfd *, bfd *));
73 
74 struct elf_cris_link_hash_entry;
75 static bfd_boolean elf_cris_discard_excess_dso_dynamics
76   PARAMS ((struct elf_cris_link_hash_entry *, PTR));
77 static bfd_boolean elf_cris_discard_excess_program_dynamics
78   PARAMS ((struct elf_cris_link_hash_entry *, PTR));
79 static bfd_boolean elf_cris_adjust_gotplt_to_got
80   PARAMS ((struct elf_cris_link_hash_entry *, PTR));
81 static bfd_boolean elf_cris_try_fold_plt_to_got
82   PARAMS ((struct elf_cris_link_hash_entry *, PTR));
83 static struct bfd_hash_entry *elf_cris_link_hash_newfunc
84   PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *));
85 static struct bfd_link_hash_table *elf_cris_link_hash_table_create
86   PARAMS ((bfd *));
87 static bfd_boolean elf_cris_adjust_dynamic_symbol
88   PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *));
89 static bfd_boolean cris_elf_check_relocs
90   PARAMS ((bfd *, struct bfd_link_info *, asection *,
91 	   const Elf_Internal_Rela *));
92 
93 static bfd_boolean elf_cris_size_dynamic_sections
94   PARAMS ((bfd *, struct bfd_link_info *));
95 static bfd_boolean elf_cris_finish_dynamic_symbol
96   PARAMS ((bfd *, struct bfd_link_info *, struct elf_link_hash_entry *,
97 	   Elf_Internal_Sym *));
98 static bfd_boolean elf_cris_finish_dynamic_sections
99   PARAMS ((bfd *, struct bfd_link_info *));
100 static void elf_cris_hide_symbol
101   PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *, bfd_boolean));
102 static enum elf_reloc_type_class elf_cris_reloc_type_class
103   PARAMS ((const Elf_Internal_Rela *));
104 
105 static reloc_howto_type cris_elf_howto_table [] =
106 {
107   /* This reloc does nothing.  */
108   HOWTO (R_CRIS_NONE,		/* type */
109 	 0,			/* rightshift */
110 	 2,			/* size (0 = byte, 1 = short, 2 = long) */
111 	 32,			/* bitsize */
112 	 FALSE,			/* pc_relative */
113 	 0,			/* bitpos */
114 	 complain_overflow_bitfield, /* complain_on_overflow */
115 	 bfd_elf_generic_reloc,	/* special_function */
116 	 "R_CRIS_NONE",		/* name */
117 	 FALSE,			/* partial_inplace */
118 	 0,			/* src_mask */
119 	 0,			/* dst_mask */
120 	 FALSE),		/* pcrel_offset */
121 
122   /* An 8 bit absolute relocation.  */
123   HOWTO (R_CRIS_8,		/* type */
124 	 0,			/* rightshift */
125 	 0,			/* size (0 = byte, 1 = short, 2 = long) */
126 	 8,			/* bitsize */
127 	 FALSE,			/* pc_relative */
128 	 0,			/* bitpos */
129 	 complain_overflow_bitfield, /* complain_on_overflow */
130 	 bfd_elf_generic_reloc,	/* special_function */
131 	 "R_CRIS_8",		/* name */
132 	 FALSE,			/* partial_inplace */
133 	 0x0000,		/* src_mask */
134 	 0x00ff,		/* dst_mask */
135 	 FALSE),		/* pcrel_offset */
136 
137   /* A 16 bit absolute relocation.  */
138   HOWTO (R_CRIS_16,		/* type */
139 	 0,			/* rightshift */
140 	 1,			/* size (0 = byte, 1 = short, 2 = long) */
141 	 16,			/* bitsize */
142 	 FALSE,			/* pc_relative */
143 	 0,			/* bitpos */
144 	 complain_overflow_bitfield, /* complain_on_overflow */
145 	 bfd_elf_generic_reloc,	/* special_function */
146 	 "R_CRIS_16",		/* name */
147 	 FALSE,			/* partial_inplace */
148 	 0x00000000,		/* src_mask */
149 	 0x0000ffff,		/* dst_mask */
150 	 FALSE),		/* pcrel_offset */
151 
152   /* A 32 bit absolute relocation.  */
153   HOWTO (R_CRIS_32,		/* type */
154 	 0,			/* rightshift */
155 	 2,			/* size (0 = byte, 1 = short, 2 = long) */
156 	 32,			/* bitsize */
157 	 FALSE,			/* pc_relative */
158 	 0,			/* bitpos */
159 	 complain_overflow_bitfield, /* complain_on_overflow */
160 	 bfd_elf_generic_reloc,	/* special_function */
161 	 "R_CRIS_32",		/* name */
162 	 FALSE,			/* partial_inplace */
163 	 0x00000000,		/* src_mask */
164 	 0xffffffff,		/* dst_mask */
165 	 FALSE),		/* pcrel_offset */
166 
167   /* An 8 bit PC-relative relocation.  */
168   HOWTO (R_CRIS_8_PCREL,	/* type */
169 	 0,			/* rightshift */
170 	 0,			/* size (0 = byte, 1 = short, 2 = long) */
171 	 8,			/* bitsize */
172 	 TRUE,			/* pc_relative */
173 	 0,			/* bitpos */
174 	 complain_overflow_bitfield, /* complain_on_overflow */
175 	 cris_elf_pcrel_reloc,	/* special_function */
176 	 "R_CRIS_8_PCREL",	/* name */
177 	 FALSE,			/* partial_inplace */
178 	 0x0000,		/* src_mask */
179 	 0x00ff,		/* dst_mask */
180 	 TRUE),			/* pcrel_offset */
181 
182   /* A 16 bit PC-relative relocation.  */
183   HOWTO (R_CRIS_16_PCREL,	/* type */
184 	 0,			/* rightshift */
185 	 1,			/* size (0 = byte, 1 = short, 2 = long) */
186 	 16,			/* bitsize */
187 	 TRUE,			/* pc_relative */
188 	 0,			/* bitpos */
189 	 complain_overflow_bitfield, /* complain_on_overflow */
190 	 cris_elf_pcrel_reloc,	/* special_function */
191 	 "R_CRIS_16_PCREL",	/* name */
192 	 FALSE,			/* partial_inplace */
193 	 0x00000000,		/* src_mask */
194 	 0x0000ffff,		/* dst_mask */
195 	 TRUE),			/* pcrel_offset */
196 
197   /* A 32 bit PC-relative relocation.  */
198   HOWTO (R_CRIS_32_PCREL,	/* type */
199 	 0,			/* rightshift */
200 	 2,			/* size (0 = byte, 1 = short, 2 = long) */
201 	 32,			/* bitsize */
202 	 TRUE,			/* pc_relative */
203 	 0,			/* bitpos */
204 	 complain_overflow_bitfield, /* complain_on_overflow */
205 	 cris_elf_pcrel_reloc,	/* special_function */
206 	 "R_CRIS_32_PCREL",	/* name */
207 	 FALSE,			/* partial_inplace */
208 	 0x00000000,		/* src_mask */
209 	 0xffffffff,		/* dst_mask */
210 	 TRUE),			/* pcrel_offset */
211 
212   /* GNU extension to record C++ vtable hierarchy.  */
213   HOWTO (R_CRIS_GNU_VTINHERIT,	/* type */
214 	 0,			/* rightshift */
215 	 2,			/* size (0 = byte, 1 = short, 2 = long) */
216 	 0,			/* bitsize */
217 	 FALSE,			/* pc_relative */
218 	 0,			/* bitpos */
219 	 complain_overflow_dont, /* complain_on_overflow */
220 	 NULL,			/* special_function */
221 	 "R_CRIS_GNU_VTINHERIT", /* name */
222 	 FALSE,			/* partial_inplace */
223 	 0,			/* src_mask */
224 	 0,			/* dst_mask */
225 	 FALSE),		/* pcrel_offset */
226 
227   /* GNU extension to record C++ vtable member usage.  */
228   HOWTO (R_CRIS_GNU_VTENTRY,	/* type */
229 	 0,			/* rightshift */
230 	 2,			/* size (0 = byte, 1 = short, 2 = long) */
231 	 0,			/* bitsize */
232 	 FALSE,			/* pc_relative */
233 	 0,			/* bitpos */
234 	 complain_overflow_dont, /* complain_on_overflow */
235 	 _bfd_elf_rel_vtable_reloc_fn,	/* special_function */
236 	 "R_CRIS_GNU_VTENTRY",	 /* name */
237 	 FALSE,			/* partial_inplace */
238 	 0,			/* src_mask */
239 	 0,			/* dst_mask */
240 	 FALSE),		/* pcrel_offset */
241 
242   /* This is used only by the dynamic linker.  The symbol should exist
243      both in the object being run and in some shared library.  The
244      dynamic linker copies the data addressed by the symbol from the
245      shared library into the object, because the object being
246      run has to have the data at some particular address.  */
247   HOWTO (R_CRIS_COPY,		/* type */
248 	 0,			/* rightshift */
249 	 2,			/* size (0 = byte, 1 = short, 2 = long) */
250 	 32,			/* bitsize */
251 	 FALSE,			/* pc_relative */
252 	 0,			/* bitpos */
253 	 complain_overflow_bitfield, /* complain_on_overflow */
254 	 bfd_elf_generic_reloc,	/* special_function */
255 	 "R_CRIS_COPY",		/* name */
256 	 FALSE,			/* partial_inplace */
257 	 0,			/* src_mask */
258 	 0,			/* dst_mask */
259 	 FALSE),		/* pcrel_offset */
260 
261   /* Like R_CRIS_32, but used when setting global offset table entries.  */
262   HOWTO (R_CRIS_GLOB_DAT,	/* type */
263 	 0,			/* rightshift */
264 	 2,			/* size (0 = byte, 1 = short, 2 = long) */
265 	 32,			/* bitsize */
266 	 FALSE,			/* pc_relative */
267 	 0,			/* bitpos */
268 	 complain_overflow_bitfield, /* complain_on_overflow */
269 	 bfd_elf_generic_reloc,	/* special_function */
270 	 "R_CRIS_GLOB_DAT",	/* name */
271 	 FALSE,			/* partial_inplace */
272 	 0,			/* src_mask */
273 	 0xffffffff,		/* dst_mask */
274 	 FALSE),		/* pcrel_offset */
275 
276   /* Marks a procedure linkage table entry for a symbol.  */
277   HOWTO (R_CRIS_JUMP_SLOT,	/* type */
278 	 0,			/* rightshift */
279 	 2,			/* size (0 = byte, 1 = short, 2 = long) */
280 	 32,			/* bitsize */
281 	 FALSE,			/* pc_relative */
282 	 0,			/* bitpos */
283 	 complain_overflow_bitfield, /* complain_on_overflow */
284 	 bfd_elf_generic_reloc,	/* special_function */
285 	 "R_CRIS_JUMP_SLOT",	/* name */
286 	 FALSE,			/* partial_inplace */
287 	 0,			/* src_mask */
288 	 0,			/* dst_mask */
289 	 FALSE),		/* pcrel_offset */
290 
291   /* Used only by the dynamic linker.  When the object is run, this
292      longword is set to the load address of the object, plus the
293      addend.  */
294   HOWTO (R_CRIS_RELATIVE,	/* type */
295 	 0,			/* rightshift */
296 	 2,			/* size (0 = byte, 1 = short, 2 = long) */
297 	 32,			/* bitsize */
298 	 FALSE,			/* pc_relative */
299 	 0,			/* bitpos */
300 	 complain_overflow_bitfield, /* complain_on_overflow */
301 	 bfd_elf_generic_reloc,	/* special_function */
302 	 "R_CRIS_RELATIVE",	/* name */
303 	 FALSE,			/* partial_inplace */
304 	 0,			/* src_mask */
305 	 0xffffffff,		/* dst_mask */
306 	 FALSE),		/* pcrel_offset */
307 
308   /* Like R_CRIS_32, but referring to the GOT table entry for the symbol.  */
309   HOWTO (R_CRIS_16_GOT,		/* type */
310 	 0,			/* rightshift */
311 	 1,			/* size (0 = byte, 1 = short, 2 = long) */
312 	 16,			/* bitsize */
313 	 FALSE,			/* pc_relative */
314 	 0,			/* bitpos */
315 	 complain_overflow_bitfield, /* complain_on_overflow */
316 	 bfd_elf_generic_reloc,	/* special_function */
317 	 "R_CRIS_16_GOT",	/* name */
318 	 FALSE,			/* partial_inplace */
319 	 0,			/* src_mask */
320 	 0xffff,		/* dst_mask */
321 	 FALSE),		/* pcrel_offset */
322 
323   HOWTO (R_CRIS_32_GOT,		/* type */
324 	 0,			/* rightshift */
325 	 2,			/* size (0 = byte, 1 = short, 2 = long) */
326 	 32,			/* bitsize */
327 	 FALSE,			/* pc_relative */
328 	 0,			/* bitpos */
329 	 complain_overflow_bitfield, /* complain_on_overflow */
330 	 bfd_elf_generic_reloc,	/* special_function */
331 	 "R_CRIS_32_GOT",	/* name */
332 	 FALSE,			/* partial_inplace */
333 	 0,			/* src_mask */
334 	 0xffffffff,		/* dst_mask */
335 	 FALSE),		/* pcrel_offset */
336 
337   /* Like R_CRIS_32_GOT, but referring to (and requesting a) PLT part of
338      the GOT table for the symbol.  */
339   HOWTO (R_CRIS_16_GOTPLT,	/* type */
340 	 0,			/* rightshift */
341 	 1,			/* size (0 = byte, 1 = short, 2 = long) */
342 	 16,			/* bitsize */
343 	 FALSE,			/* pc_relative */
344 	 0,			/* bitpos */
345 	 complain_overflow_bitfield, /* complain_on_overflow */
346 	 bfd_elf_generic_reloc,	/* special_function */
347 	 "R_CRIS_16_GOTPLT",	/* name */
348 	 FALSE,			/* partial_inplace */
349 	 0,			/* src_mask */
350 	 0xffff,		/* dst_mask */
351 	 FALSE),		/* pcrel_offset */
352 
353   HOWTO (R_CRIS_32_GOTPLT,	/* type */
354 	 0,			/* rightshift */
355 	 2,			/* size (0 = byte, 1 = short, 2 = long) */
356 	 32,			/* bitsize */
357 	 FALSE,			/* pc_relative */
358 	 0,			/* bitpos */
359 	 complain_overflow_bitfield, /* complain_on_overflow */
360 	 bfd_elf_generic_reloc,	/* special_function */
361 	 "R_CRIS_32_GOTPLT",	/* name */
362 	 FALSE,			/* partial_inplace */
363 	 0,			/* src_mask */
364 	 0xffffffff,		/* dst_mask */
365 	 FALSE),		/* pcrel_offset */
366 
367   /* A 32-bit offset from GOT to (local const) symbol: no GOT entry should
368      be necessary.  */
369   HOWTO (R_CRIS_32_GOTREL,	/* type */
370 	 0,			/* rightshift */
371 	 2,			/* size (0 = byte, 1 = short, 2 = long) */
372 	 32,			/* bitsize */
373 	 FALSE,			/* pc_relative */
374 	 0,			/* bitpos */
375 	 complain_overflow_bitfield, /* complain_on_overflow */
376 	 bfd_elf_generic_reloc,	/* special_function */
377 	 "R_CRIS_32_GOTREL",	/* name */
378 	 FALSE,			/* partial_inplace */
379 	 0,			/* src_mask */
380 	 0xffffffff,		/* dst_mask */
381 	 FALSE),		/* pcrel_offset */
382 
383   /* A 32-bit offset from GOT to entry for this symbol in PLT and request
384      to create PLT entry for symbol.  */
385   HOWTO (R_CRIS_32_PLT_GOTREL,	/* type */
386 	 0,			/* rightshift */
387 	 2,			/* size (0 = byte, 1 = short, 2 = long) */
388 	 32,			/* bitsize */
389 	 FALSE,			/* pc_relative */
390 	 0,			/* bitpos */
391 	 complain_overflow_bitfield, /* complain_on_overflow */
392 	 bfd_elf_generic_reloc,	/* special_function */
393 	 "R_CRIS_32_PLT_GOTREL", /* name */
394 	 FALSE,			/* partial_inplace */
395 	 0,			/* src_mask */
396 	 0xffffffff,		/* dst_mask */
397 	 FALSE),		/* pcrel_offset */
398 
399   /* A 32-bit offset from PC (location after the relocation) + addend to
400      entry for this symbol in PLT and request to create PLT entry for
401      symbol.  */
402   HOWTO (R_CRIS_32_PLT_PCREL,	/* type */
403 	 0,			/* rightshift */
404 	 2,			/* size (0 = byte, 1 = short, 2 = long) */
405 	 32,			/* bitsize */
406 	 TRUE,			/* pc_relative */
407 	 0,			/* bitpos */
408 	 complain_overflow_bitfield, /* complain_on_overflow */
409 	 cris_elf_pcrel_reloc,	/* special_function */
410 	 "R_CRIS_32_PLT_PCREL",	/* name */
411 	 FALSE,			/* partial_inplace */
412 	 0,			/* src_mask */
413 	 0xffffffff,		/* dst_mask */
414 	 TRUE)			/* pcrel_offset */
415 };
416 
417 /* Map BFD reloc types to CRIS ELF reloc types.  */
418 
419 struct cris_reloc_map
420 {
421   bfd_reloc_code_real_type bfd_reloc_val;
422   unsigned int cris_reloc_val;
423 };
424 
425 static const struct cris_reloc_map cris_reloc_map [] =
426 {
427   { BFD_RELOC_NONE,		R_CRIS_NONE },
428   { BFD_RELOC_8,		R_CRIS_8 },
429   { BFD_RELOC_16,		R_CRIS_16 },
430   { BFD_RELOC_32,		R_CRIS_32 },
431   { BFD_RELOC_8_PCREL,		R_CRIS_8_PCREL },
432   { BFD_RELOC_16_PCREL,		R_CRIS_16_PCREL },
433   { BFD_RELOC_32_PCREL,		R_CRIS_32_PCREL },
434   { BFD_RELOC_VTABLE_INHERIT,	R_CRIS_GNU_VTINHERIT },
435   { BFD_RELOC_VTABLE_ENTRY,	R_CRIS_GNU_VTENTRY },
436   { BFD_RELOC_CRIS_COPY,	R_CRIS_COPY },
437   { BFD_RELOC_CRIS_GLOB_DAT,	R_CRIS_GLOB_DAT },
438   { BFD_RELOC_CRIS_JUMP_SLOT,	R_CRIS_JUMP_SLOT },
439   { BFD_RELOC_CRIS_RELATIVE,	R_CRIS_RELATIVE },
440   { BFD_RELOC_CRIS_16_GOT,	R_CRIS_16_GOT },
441   { BFD_RELOC_CRIS_32_GOT,	R_CRIS_32_GOT },
442   { BFD_RELOC_CRIS_16_GOTPLT,	R_CRIS_16_GOTPLT },
443   { BFD_RELOC_CRIS_32_GOTPLT,	R_CRIS_32_GOTPLT },
444   { BFD_RELOC_CRIS_32_GOTREL,	R_CRIS_32_GOTREL },
445   { BFD_RELOC_CRIS_32_PLT_GOTREL, R_CRIS_32_PLT_GOTREL },
446   { BFD_RELOC_CRIS_32_PLT_PCREL, R_CRIS_32_PLT_PCREL }
447 };
448 
449 static reloc_howto_type *
cris_reloc_type_lookup(abfd,code)450 cris_reloc_type_lookup (abfd, code)
451      bfd * abfd ATTRIBUTE_UNUSED;
452      bfd_reloc_code_real_type code;
453 {
454   unsigned int i;
455 
456   for (i = 0; i < sizeof (cris_reloc_map) / sizeof (cris_reloc_map[0]); i++)
457     if (cris_reloc_map [i].bfd_reloc_val == code)
458       return & cris_elf_howto_table [cris_reloc_map[i].cris_reloc_val];
459 
460   return NULL;
461 }
462 
463 /* Set the howto pointer for an CRIS ELF reloc.  */
464 
465 static void
cris_info_to_howto_rela(abfd,cache_ptr,dst)466 cris_info_to_howto_rela (abfd, cache_ptr, dst)
467      bfd * abfd ATTRIBUTE_UNUSED;
468      arelent * cache_ptr;
469      Elf_Internal_Rela * dst;
470 {
471   unsigned int r_type;
472 
473   r_type = ELF32_R_TYPE (dst->r_info);
474   BFD_ASSERT (r_type < (unsigned int) R_CRIS_max);
475   cache_ptr->howto = & cris_elf_howto_table [r_type];
476 }
477 
478 bfd_reloc_status_type
cris_elf_pcrel_reloc(abfd,reloc_entry,symbol,data,input_section,output_bfd,error_message)479 cris_elf_pcrel_reloc (abfd, reloc_entry, symbol, data, input_section,
480 		      output_bfd, error_message)
481      bfd *abfd ATTRIBUTE_UNUSED;
482      arelent *reloc_entry;
483      asymbol *symbol;
484      PTR data ATTRIBUTE_UNUSED;
485      asection *input_section;
486      bfd *output_bfd;
487      char **error_message ATTRIBUTE_UNUSED;
488 {
489   /* By default (using only bfd_elf_generic_reloc when linking to
490      non-ELF formats) PC-relative relocs are relative to the beginning
491      of the reloc.  CRIS PC-relative relocs are relative to the position
492      *after* the reloc because that's what pre-CRISv32 PC points to
493      after reading an insn field with that reloc.  (For CRISv32, PC is
494      actually relative to the start of the insn, but we keep the old
495      definition.)  Still, we use as much generic machinery as we can.
496 
497      Only adjust when doing a final link.  */
498   if (output_bfd == (bfd *) NULL)
499     reloc_entry->addend -= 1 << reloc_entry->howto->size;
500 
501   return
502     bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
503 			   input_section, output_bfd, error_message);
504 }
505 
506 /* Support for core dump NOTE sections.
507    The slightly unintuitive code layout is an attempt to keep at least
508    some similarities with other ports, hoping to simplify general
509    changes, while still keeping Linux/CRIS and Linux/CRISv32 code apart.  */
510 
511 static bfd_boolean
cris_elf_grok_prstatus(abfd,note)512 cris_elf_grok_prstatus (abfd, note)
513      bfd *abfd;
514      Elf_Internal_Note *note;
515 {
516   int offset;
517   size_t size;
518 
519   if (bfd_get_mach (abfd) == bfd_mach_cris_v32)
520     switch (note->descsz)
521       {
522       default:
523 	return FALSE;
524 
525       case 202:		/* Linux/CRISv32 */
526 	/* pr_cursig */
527 	elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
528 
529 	/* pr_pid */
530 	elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 22);
531 
532 	/* pr_reg */
533 	offset = 70;
534 	size = 128;
535 
536 	break;
537       }
538   else
539     switch (note->descsz)
540       {
541       default:
542 	return FALSE;
543 
544       case 214:		/* Linux/CRIS */
545 	/* pr_cursig */
546 	elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
547 
548 	/* pr_pid */
549 	elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 22);
550 
551 	/* pr_reg */
552 	offset = 70;
553 	size = 140;
554 
555 	break;
556       }
557 
558   /* Make a ".reg/999" section.  */
559   return _bfd_elfcore_make_pseudosection (abfd, ".reg",
560 					  size, note->descpos + offset);
561 }
562 
563 static bfd_boolean
cris_elf_grok_psinfo(abfd,note)564 cris_elf_grok_psinfo (abfd, note)
565      bfd *abfd;
566      Elf_Internal_Note *note;
567 {
568   if (bfd_get_mach (abfd) == bfd_mach_cris_v32)
569     switch (note->descsz)
570       {
571       default:
572 	return FALSE;
573 
574       case 124:		/* Linux/CRISv32 elf_prpsinfo */
575 	elf_tdata (abfd)->core_program
576 	  = _bfd_elfcore_strndup (abfd, note->descdata + 28, 16);
577 	elf_tdata (abfd)->core_command
578 	  = _bfd_elfcore_strndup (abfd, note->descdata + 44, 80);
579       }
580   else
581     switch (note->descsz)
582       {
583       default:
584 	return FALSE;
585 
586       case 124:		/* Linux/CRIS elf_prpsinfo */
587 	elf_tdata (abfd)->core_program
588 	  = _bfd_elfcore_strndup (abfd, note->descdata + 28, 16);
589 	elf_tdata (abfd)->core_command
590 	  = _bfd_elfcore_strndup (abfd, note->descdata + 44, 80);
591       }
592 
593   /* Note that for some reason, a spurious space is tacked
594      onto the end of the args in some (at least one anyway)
595      implementations, so strip it off if it exists.  */
596 
597   {
598     char *command = elf_tdata (abfd)->core_command;
599     int n = strlen (command);
600 
601     if (0 < n && command[n - 1] == ' ')
602       command[n - 1] = '\0';
603   }
604 
605   return TRUE;
606 }
607 
608 /* The name of the dynamic interpreter.  This is put in the .interp
609    section.  */
610 
611 #define ELF_DYNAMIC_INTERPRETER "/lib/ld.so.1"
612 
613 /* The size in bytes of an entry in the procedure linkage table.  */
614 
615 #define PLT_ENTRY_SIZE 20
616 #define PLT_ENTRY_SIZE_V32 26
617 
618 /* The first entry in an absolute procedure linkage table looks like this.  */
619 
620 static const bfd_byte elf_cris_plt0_entry[PLT_ENTRY_SIZE] =
621 {
622   0xfc, 0xe1,
623   0x7e, 0x7e,	/* push mof.  */
624   0x7f, 0x0d,   /*  (dip [pc+]) */
625   0, 0, 0, 0,	/*  Replaced with address of .got + 4.  */
626   0x30, 0x7a,	/* move [...],mof */
627   0x7f, 0x0d,   /*  (dip [pc+]) */
628   0, 0, 0, 0,	/*  Replaced with address of .got + 8.  */
629   0x30, 0x09	/* jump [...] */
630 };
631 
632 static const bfd_byte elf_cris_plt0_entry_v32[PLT_ENTRY_SIZE_V32] =
633 {
634   0x84, 0xe2,	/* subq 4,$sp */
635   0x6f, 0xfe,	/* move.d 0,$acr */
636   0, 0, 0, 0,	/*  Replaced by address of .got + 4.  */
637   0x7e, 0x7a,	/* move $mof,[$sp] */
638   0x3f, 0x7a,	/* move [$acr],$mof */
639   0x04, 0xf2,	/* addq 4,acr */
640   0x6f, 0xfa,	/* move.d [$acr],$acr */
641   0xbf, 0x09,	/* jump $acr */
642   0xb0, 0x05,	/* nop */
643   0, 0		/*  Pad out to 26 bytes.  */
644 };
645 
646 /* Subsequent entries in an absolute procedure linkage table look like
647    this.  */
648 
649 static const bfd_byte elf_cris_plt_entry[PLT_ENTRY_SIZE] =
650 {
651   0x7f, 0x0d,   /*  (dip [pc+]) */
652   0, 0, 0, 0,	/*  Replaced with address of this symbol in .got.  */
653   0x30, 0x09,	/* jump [...] */
654   0x3f,	 0x7e,	/* move [pc+],mof */
655   0, 0, 0, 0,	/*  Replaced with offset into relocation table.  */
656   0x2f, 0xfe,	/* add.d [pc+],pc */
657   0xec, 0xff,
658   0xff, 0xff	/*  Replaced with offset to start of .plt.  */
659 };
660 
661 static const bfd_byte elf_cris_plt_entry_v32[PLT_ENTRY_SIZE_V32] =
662 {
663   0x6f, 0xfe,	/* move.d 0,$acr */
664   0, 0, 0, 0,	/*  Replaced with address of this symbol in .got.  */
665   0x6f, 0xfa,   /* move.d [$acr],$acr */
666   0xbf, 0x09,   /* jump $acr */
667   0xb0, 0x05,	/* nop */
668   0x3f, 0x7e,	/* move 0,mof */
669   0, 0, 0, 0,	/*  Replaced with offset into relocation table. */
670   0xbf, 0x0e,	/* ba start_of_plt0_entry */
671   0, 0, 0, 0,	/*  Replaced with offset to plt0 entry.  */
672   0xb0, 0x05	/* nop */
673 };
674 
675 /* The first entry in a PIC procedure linkage table looks like this.  */
676 
677 static const bfd_byte elf_cris_pic_plt0_entry[PLT_ENTRY_SIZE] =
678 {
679   0xfc, 0xe1, 0x7e, 0x7e,	/* push mof */
680   0x04, 0x01, 0x30, 0x7a,	/* move [r0+4],mof */
681   0x08, 0x01, 0x30, 0x09,	/* jump [r0+8] */
682   0, 0, 0, 0, 0, 0, 0, 0,	/*  Pad out to 20 bytes.  */
683 };
684 
685 static const bfd_byte elf_cris_pic_plt0_entry_v32[PLT_ENTRY_SIZE_V32] =
686 {
687   0x84, 0xe2,	/* subq 4,$sp */
688   0x04, 0x01,	/* addoq 4,$r0,$acr */
689   0x7e, 0x7a,	/* move $mof,[$sp] */
690   0x3f, 0x7a,	/* move [$acr],$mof */
691   0x04, 0xf2,	/* addq 4,$acr */
692   0x6f, 0xfa,	/* move.d [$acr],$acr */
693   0xbf, 0x09,	/* jump $acr */
694   0xb0, 0x05,	/* nop */
695   0, 0,		/*  Pad out to 26 bytes.  */
696   0, 0, 0, 0,
697   0, 0, 0, 0
698 };
699 
700 /* Subsequent entries in a PIC procedure linkage table look like this.  */
701 
702 static const bfd_byte elf_cris_pic_plt_entry[PLT_ENTRY_SIZE] =
703 {
704   0x6f, 0x0d,   /*  (bdap [pc+].d,r0) */
705   0, 0, 0, 0,	/*  Replaced with offset of this symbol in .got.  */
706   0x30, 0x09,	/* jump [...] */
707   0x3f, 0x7e,	/* move [pc+],mof */
708   0, 0, 0, 0,	/*  Replaced with offset into relocation table.  */
709   0x2f, 0xfe,	/* add.d [pc+],pc */
710   0xec, 0xff,	/*  Replaced with offset to start of .plt.  */
711   0xff, 0xff
712 };
713 
714 static const bfd_byte elf_cris_pic_plt_entry_v32[PLT_ENTRY_SIZE_V32] =
715 {
716   0x6f, 0x0d,	/* addo.d 0,$r0,$acr */
717   0, 0, 0, 0,	/*  Replaced with offset of this symbol in .got.  */
718   0x6f, 0xfa,	/* move.d [$acr],$acr */
719   0xbf, 0x09,	/* jump $acr */
720   0xb0, 0x05,	/* nop */
721   0x3f, 0x7e,	/* move relocoffs,$mof */
722   0, 0, 0, 0,	/*  Replaced with offset into relocation table.  */
723   0xbf, 0x0e,	/* ba start_of_plt */
724   0, 0, 0, 0,	/*  Replaced with offset to start of .plt.  */
725   0xb0, 0x05	/* nop */
726 };
727 
728 /* We copy elf32-m68k.c and elf32-i386.c for the basic linker hash bits
729    (and most other PIC/shlib stuff).  Check that we don't drift away
730    without reason.
731 
732    The CRIS linker, like the m68k and i386 linkers (and probably the rest
733    too) needs to keep track of the number of relocs that it decides to
734    copy in check_relocs for each symbol.  This is so that it can discard
735    PC relative relocs if it doesn't need them when linking with
736    -Bsymbolic.  We store the information in a field extending the regular
737    ELF linker hash table.  */
738 
739 /* This structure keeps track of the number of PC relative relocs we have
740    copied for a given symbol.  */
741 
742 struct elf_cris_pcrel_relocs_copied
743 {
744   /* Next section.  */
745   struct elf_cris_pcrel_relocs_copied *next;
746   /* A section in dynobj.  */
747   asection *section;
748   /* Number of relocs copied in this section.  */
749   bfd_size_type count;
750 };
751 
752 /* CRIS ELF linker hash entry.  */
753 
754 struct elf_cris_link_hash_entry
755 {
756   struct elf_link_hash_entry root;
757 
758   /* Number of PC relative relocs copied for this symbol.  */
759   struct elf_cris_pcrel_relocs_copied *pcrel_relocs_copied;
760 
761   /* The GOTPLT references are CRIS-specific; the goal is to avoid having
762      both a general GOT and a PLT-specific GOT entry for the same symbol,
763      when it is referenced both as a function and as a function pointer.
764 
765      Number of GOTPLT references for a function.  */
766   bfd_signed_vma gotplt_refcount;
767 
768   /* Actual GOTPLT index for this symbol, if applicable, or zero if not
769      (zero is never used as an index).  FIXME: We should be able to fold
770      this with gotplt_refcount in a union, like the got and plt unions in
771      elf_link_hash_entry.  */
772   bfd_size_type gotplt_offset;
773 };
774 
775 /* CRIS ELF linker hash table.  */
776 
777 struct elf_cris_link_hash_table
778 {
779   struct elf_link_hash_table root;
780 
781   /* We can't use the PLT offset and calculate to get the GOTPLT offset,
782      since we try and avoid creating GOTPLT:s when there's already a GOT.
783      Instead, we keep and update the next available index here.  */
784   bfd_size_type next_gotplt_entry;
785 };
786 
787 /* Traverse a CRIS ELF linker hash table.  */
788 
789 #define elf_cris_link_hash_traverse(table, func, info)			\
790   (elf_link_hash_traverse						\
791    (&(table)->root,							\
792     (bfd_boolean (*) PARAMS ((struct elf_link_hash_entry *, PTR))) (func), \
793     (info)))
794 
795 /* Get the CRIS ELF linker hash table from a link_info structure.  */
796 
797 #define elf_cris_hash_table(p) \
798   ((struct elf_cris_link_hash_table *) (p)->hash)
799 
800 /* Create an entry in a CRIS ELF linker hash table.  */
801 
802 static struct bfd_hash_entry *
elf_cris_link_hash_newfunc(entry,table,string)803 elf_cris_link_hash_newfunc (entry, table, string)
804      struct bfd_hash_entry *entry;
805      struct bfd_hash_table *table;
806      const char *string;
807 {
808   struct elf_cris_link_hash_entry *ret =
809     (struct elf_cris_link_hash_entry *) entry;
810 
811   /* Allocate the structure if it has not already been allocated by a
812      subclass.  */
813   if (ret == (struct elf_cris_link_hash_entry *) NULL)
814     ret = ((struct elf_cris_link_hash_entry *)
815 	   bfd_hash_allocate (table,
816 			      sizeof (struct elf_cris_link_hash_entry)));
817   if (ret == (struct elf_cris_link_hash_entry *) NULL)
818     return (struct bfd_hash_entry *) ret;
819 
820   /* Call the allocation method of the superclass.  */
821   ret = ((struct elf_cris_link_hash_entry *)
822 	 _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret,
823 				     table, string));
824   if (ret != (struct elf_cris_link_hash_entry *) NULL)
825     {
826       ret->pcrel_relocs_copied = NULL;
827       ret->gotplt_refcount = 0;
828       ret->gotplt_offset = 0;
829     }
830 
831   return (struct bfd_hash_entry *) ret;
832 }
833 
834 /* Create a CRIS ELF linker hash table.  */
835 
836 static struct bfd_link_hash_table *
elf_cris_link_hash_table_create(abfd)837 elf_cris_link_hash_table_create (abfd)
838      bfd *abfd;
839 {
840   struct elf_cris_link_hash_table *ret;
841   bfd_size_type amt = sizeof (struct elf_cris_link_hash_table);
842 
843   ret = ((struct elf_cris_link_hash_table *) bfd_malloc (amt));
844   if (ret == (struct elf_cris_link_hash_table *) NULL)
845     return NULL;
846 
847   if (! _bfd_elf_link_hash_table_init (&ret->root, abfd,
848 				       elf_cris_link_hash_newfunc))
849     {
850       free (ret);
851       return NULL;
852     }
853 
854   /* Initialize to skip over the first three entries in the gotplt; they
855      are used for run-time symbol evaluation.  */
856   ret->next_gotplt_entry = 12;
857 
858   return &ret->root.root;
859 }
860 
861 /* Perform a single relocation.  By default we use the standard BFD
862    routines, with a few tweaks.  */
863 
864 static bfd_reloc_status_type
cris_final_link_relocate(howto,input_bfd,input_section,contents,rel,relocation)865 cris_final_link_relocate (howto, input_bfd, input_section, contents, rel,
866 			  relocation)
867      reloc_howto_type *  howto;
868      bfd *               input_bfd;
869      asection *          input_section;
870      bfd_byte *          contents;
871      Elf_Internal_Rela * rel;
872      bfd_vma             relocation;
873 {
874   bfd_reloc_status_type r;
875 
876   /* PC-relative relocations are relative to the position *after*
877      the reloc.  Note that for R_CRIS_8_PCREL the adjustment is
878      not a single byte, since PC must be 16-bit-aligned.  */
879   switch (ELF32_R_TYPE (rel->r_info))
880     {
881       /* Check that the 16-bit GOT relocs are positive.  */
882     case R_CRIS_16_GOTPLT:
883     case R_CRIS_16_GOT:
884       if ((bfd_signed_vma) relocation < 0)
885 	return bfd_reloc_overflow;
886       break;
887 
888     case R_CRIS_32_PLT_PCREL:
889     case R_CRIS_32_PCREL:
890       relocation -= 2;
891       /* Fall through.  */
892     case R_CRIS_8_PCREL:
893     case R_CRIS_16_PCREL:
894       relocation -= 2;
895       break;
896 
897     default:
898       break;
899     }
900 
901   r = _bfd_final_link_relocate (howto, input_bfd, input_section,
902 				contents, rel->r_offset,
903 				relocation, rel->r_addend);
904   return r;
905 }
906 
907 /* Relocate an CRIS ELF section.  See elf32-fr30.c, from where this was
908    copied, for further comments.  */
909 
910 static bfd_boolean
cris_elf_relocate_section(output_bfd,info,input_bfd,input_section,contents,relocs,local_syms,local_sections)911 cris_elf_relocate_section (output_bfd, info, input_bfd, input_section,
912 			   contents, relocs, local_syms, local_sections)
913      bfd *output_bfd ATTRIBUTE_UNUSED;
914      struct bfd_link_info *info;
915      bfd *input_bfd;
916      asection *input_section;
917      bfd_byte *contents;
918      Elf_Internal_Rela *relocs;
919      Elf_Internal_Sym *local_syms;
920      asection **local_sections;
921 {
922   bfd *dynobj;
923   Elf_Internal_Shdr *symtab_hdr;
924   struct elf_link_hash_entry **sym_hashes;
925   bfd_vma *local_got_offsets;
926   asection *sgot;
927   asection *splt;
928   asection *sreloc;
929   Elf_Internal_Rela *rel;
930   Elf_Internal_Rela *relend;
931 
932   if (info->relocatable)
933     return TRUE;
934 
935   dynobj = elf_hash_table (info)->dynobj;
936   local_got_offsets = elf_local_got_offsets (input_bfd);
937   symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr;
938   sym_hashes = elf_sym_hashes (input_bfd);
939   relend     = relocs + input_section->reloc_count;
940 
941   sgot = NULL;
942   splt = NULL;
943   sreloc = NULL;
944 
945   if (dynobj != NULL)
946     {
947       splt = bfd_get_section_by_name (dynobj, ".plt");
948       sgot = bfd_get_section_by_name (dynobj, ".got");
949     }
950 
951   for (rel = relocs; rel < relend; rel ++)
952     {
953       reloc_howto_type *howto;
954       unsigned long r_symndx;
955       Elf_Internal_Sym *sym;
956       asection *sec;
957       struct elf_link_hash_entry *h;
958       bfd_vma relocation;
959       bfd_reloc_status_type r;
960       const char *symname = NULL;
961       int r_type;
962 
963       r_type = ELF32_R_TYPE (rel->r_info);
964 
965       if (   r_type == R_CRIS_GNU_VTINHERIT
966 	  || r_type == R_CRIS_GNU_VTENTRY)
967 	continue;
968 
969       /* This is a final link.  */
970       r_symndx = ELF32_R_SYM (rel->r_info);
971       howto  = cris_elf_howto_table + r_type;
972       h      = NULL;
973       sym    = NULL;
974       sec    = NULL;
975 
976       if (r_symndx < symtab_hdr->sh_info)
977 	{
978 	  sym = local_syms + r_symndx;
979 	  sec = local_sections [r_symndx];
980 	  relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
981 
982 	  symname = (bfd_elf_string_from_elf_section
983 		     (input_bfd, symtab_hdr->sh_link, sym->st_name));
984 	  if (symname == NULL)
985 	    symname = bfd_section_name (input_bfd, sec);
986 	}
987       else
988 	{
989 	  bfd_boolean warned;
990 	  bfd_boolean unresolved_reloc;
991 
992 	  RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
993 				   r_symndx, symtab_hdr, sym_hashes,
994 				   h, sec, relocation,
995 				   unresolved_reloc, warned);
996 
997 	  if (unresolved_reloc
998 	      /* Perhaps we should detect the cases that
999 		 sec->output_section is expected to be NULL like i386 and
1000 		 m68k, but apparently (and according to elfxx-ia64.c) all
1001 		 valid cases are where the symbol is defined in a shared
1002 		 object which we link dynamically against.  This includes
1003 		 PLT relocs for which we've created a PLT entry and other
1004 		 relocs for which we're prepared to create dynamic
1005 		 relocations.
1006 
1007 		 For now, new situations cause us to just err when
1008 		 sec->output_offset is NULL but the object with the symbol
1009 		 is *not* dynamically linked against.  Thus this will
1010 		 automatically remind us so we can see if there are other
1011 		 valid cases we need to revisit.  */
1012 	      && (sec->owner->flags & DYNAMIC) != 0)
1013 	    relocation = 0;
1014 
1015 	  else if (h->root.type == bfd_link_hash_defined
1016 		   || h->root.type == bfd_link_hash_defweak)
1017 	    {
1018 	      /* Here follow the cases where the relocation value must
1019 		 be zero (or when further handling is simplified when
1020 		 zero).  I can't claim to understand the various
1021 		 conditions and they weren't described in the files
1022 		 where I copied them from (elf32-m68k.c and
1023 		 elf32-i386.c), but let's mention examples of where
1024 		 they happen.  FIXME: Perhaps define and use a
1025 		 dynamic_symbol_p function like ia64.
1026 
1027 		 - When creating a shared library, we can have an
1028 		 ordinary relocation for a symbol defined in a shared
1029 		 library (perhaps the one we create).  We then make
1030 		 the relocation value zero, as the value seen now will
1031 		 be added into the relocation addend in this shared
1032 		 library, but must be handled only at dynamic-link
1033 		 time.  FIXME: Not sure this example covers the
1034 		 h->elf_link_hash_flags test, though it's there in
1035 		 other targets.  */
1036 	      if (info->shared
1037 		  && ((! info->symbolic && h->dynindx != -1)
1038 		      || !h->def_regular)
1039 		  && (input_section->flags & SEC_ALLOC) != 0
1040 		  && (r_type == R_CRIS_8
1041 		      || r_type == R_CRIS_16
1042 		      || r_type == R_CRIS_32
1043 		      || r_type == R_CRIS_8_PCREL
1044 		      || r_type == R_CRIS_16_PCREL
1045 		      || r_type == R_CRIS_32_PCREL))
1046 		relocation = 0;
1047 	      else if (unresolved_reloc)
1048 		{
1049 		  _bfd_error_handler
1050 		    (_("%B, section %A: unresolvable relocation %s against symbol `%s'"),
1051 		     input_bfd,
1052 		     input_section,
1053 		     cris_elf_howto_table[r_type].name,
1054 		     symname);
1055 		  bfd_set_error (bfd_error_bad_value);
1056 		  return FALSE;
1057 		}
1058 	    }
1059 	}
1060 
1061       switch (r_type)
1062 	{
1063 	case R_CRIS_16_GOTPLT:
1064 	case R_CRIS_32_GOTPLT:
1065 	  /* This is like the case for R_CRIS_32_GOT and R_CRIS_16_GOT,
1066 	     but we require a PLT, and the PLT handling will take care of
1067 	     filling in the PLT-specific GOT entry.  For the GOT offset,
1068 	     calculate it as we do when filling it in for the .got.plt
1069 	     section.  If we don't have a PLT, punt to GOT handling.  */
1070 	  if (h != NULL
1071 	      && ((struct elf_cris_link_hash_entry *) h)->gotplt_offset != 0)
1072 	    {
1073 	      asection *sgotplt
1074 		= bfd_get_section_by_name (dynobj, ".got.plt");
1075 	      bfd_vma got_offset;
1076 
1077 	      BFD_ASSERT (h->dynindx != -1);
1078 	      BFD_ASSERT (sgotplt != NULL);
1079 
1080 	      got_offset
1081 		= ((struct elf_cris_link_hash_entry *) h)->gotplt_offset;
1082 
1083 	      relocation = got_offset;
1084 	      break;
1085 	    }
1086 
1087 	  /* We didn't make a PLT entry for this symbol.  Maybe everything is
1088 	     folded into the GOT.  Other than folding, this happens when
1089 	     statically linking PIC code, or when using -Bsymbolic.  Check
1090 	     that we instead have a GOT entry as done for us by
1091 	     elf_cris_adjust_dynamic_symbol, and drop through into the
1092 	     ordinary GOT cases.  This must not happen for the
1093 	     executable, because any reference it does to a function
1094 	     that is satisfied by a DSO must generate a PLT.  We assume
1095 	     these call-specific relocs don't address non-functions.  */
1096 	  if (h != NULL
1097 	      && (h->got.offset == (bfd_vma) -1
1098 		  || (!info->shared
1099 		      && !(h->def_regular
1100 			   || (!h->def_dynamic
1101 			       && h->root.type == bfd_link_hash_undefweak)))))
1102 	    {
1103 	      (*_bfd_error_handler)
1104 		((h->got.offset == (bfd_vma) -1)
1105 		 ? _("%B, section %A: No PLT nor GOT for relocation %s"
1106 		     " against symbol `%s'")
1107 		 : _("%B, section %A: No PLT for relocation %s"
1108 		     " against symbol `%s'"),
1109 		 input_bfd,
1110 		 input_section,
1111 		 cris_elf_howto_table[r_type].name,
1112 		 (symname != NULL && symname[0] != '\0'
1113 		  ? symname : _("[whose name is lost]")));
1114 
1115 	      /* FIXME: Perhaps blaming input is not the right thing to
1116 		 do; this is probably an internal error.  But it is true
1117 		 that we didn't like that particular input.  */
1118 	      bfd_set_error (bfd_error_bad_value);
1119 	      return FALSE;
1120 	    }
1121 	  /* Fall through.  */
1122 
1123 	  /* The size of the actual relocation is not used here; we only
1124 	     fill in the GOT table here.  */
1125 	case R_CRIS_16_GOT:
1126 	case R_CRIS_32_GOT:
1127 	  {
1128 	    bfd_vma off;
1129 
1130 	    /* Note that despite using RELA relocations, the .got contents
1131 	       is always filled in with the link-relative relocation
1132 	       value; the addend.  */
1133 
1134 	    if (h != NULL)
1135 	      {
1136 		off = h->got.offset;
1137 		BFD_ASSERT (off != (bfd_vma) -1);
1138 
1139 		if (!elf_hash_table (info)->dynamic_sections_created
1140 		    || (! info->shared
1141 			&& (h->def_regular
1142 			    || h->type == STT_FUNC
1143 			    || h->needs_plt))
1144 		    || (info->shared
1145 			&& (info->symbolic || h->dynindx == -1)
1146 			&& h->def_regular))
1147 		  {
1148 		    /* This wasn't checked above for ! info->shared, but
1149 		       must hold there if we get here; the symbol must
1150 		       be defined in the regular program or be undefweak
1151 		       or be a function or otherwise need a PLT.  */
1152 		    BFD_ASSERT (!elf_hash_table (info)->dynamic_sections_created
1153 				|| info->shared
1154 				|| h->def_regular
1155 				|| h->type == STT_FUNC
1156 				|| h->needs_plt
1157 				|| h->root.type == bfd_link_hash_undefweak);
1158 
1159 		    /* This is actually a static link, or it is a
1160 		       -Bsymbolic link and the symbol is defined locally,
1161 		       or is undefweak, or the symbol was forced to be
1162 		       local because of a version file, or we're not
1163 		       creating a dynamic object.  We must initialize this
1164 		       entry in the global offset table.  Since the offset
1165 		       must always be a multiple of 4, we use the least
1166 		       significant bit to record whether we have
1167 		       initialized it already.
1168 
1169 		       If this GOT entry should be runtime-initialized, we
1170 		       will create a .rela.got relocation entry to
1171 		       initialize the value.  This is done in the
1172 		       finish_dynamic_symbol routine.  */
1173 		    if ((off & 1) != 0)
1174 		      off &= ~1;
1175 		    else
1176 		      {
1177 			bfd_put_32 (output_bfd, relocation,
1178 				    sgot->contents + off);
1179 			h->got.offset |= 1;
1180 		      }
1181 		  }
1182 	      }
1183 	    else
1184 	      {
1185 		BFD_ASSERT (local_got_offsets != NULL
1186 			    && local_got_offsets[r_symndx] != (bfd_vma) -1);
1187 
1188 		off = local_got_offsets[r_symndx];
1189 
1190 		/* The offset must always be a multiple of 4.  We use
1191 		   the least significant bit to record whether we have
1192 		   already generated the necessary reloc.  */
1193 		if ((off & 1) != 0)
1194 		  off &= ~1;
1195 		else
1196 		  {
1197 		    bfd_put_32 (output_bfd, relocation, sgot->contents + off);
1198 
1199 		    if (info->shared)
1200 		      {
1201 			asection *s;
1202 			Elf_Internal_Rela outrel;
1203 			bfd_byte *loc;
1204 
1205 			s = bfd_get_section_by_name (dynobj, ".rela.got");
1206 			BFD_ASSERT (s != NULL);
1207 
1208 			outrel.r_offset = (sgot->output_section->vma
1209 					   + sgot->output_offset
1210 					   + off);
1211 			outrel.r_info = ELF32_R_INFO (0, R_CRIS_RELATIVE);
1212 			outrel.r_addend = relocation;
1213 			loc = s->contents;
1214 			loc += s->reloc_count++ * sizeof (Elf32_External_Rela);
1215 			bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
1216 		      }
1217 
1218 		    local_got_offsets[r_symndx] |= 1;
1219 		  }
1220 	      }
1221 
1222 	    relocation = sgot->output_offset + off;
1223 	    if (rel->r_addend != 0)
1224 	      {
1225 		/* We can't do anything for a relocation which is against
1226 		   a symbol *plus offset*.  GOT holds relocations for
1227 		   symbols.  Make this an error; the compiler isn't
1228 		   allowed to pass us these kinds of things.  */
1229 		if (h == NULL)
1230 		  (*_bfd_error_handler)
1231 		    (_("%B, section %A: relocation %s with non-zero addend %d"
1232 		       " against local symbol"),
1233 		     input_bfd,
1234 		     input_section,
1235 		     cris_elf_howto_table[r_type].name,
1236 		     rel->r_addend);
1237 		else
1238 		  (*_bfd_error_handler)
1239 		    (_("%B, section %A: relocation %s with non-zero addend %d"
1240 		       " against symbol `%s'"),
1241 		     input_bfd,
1242 		     input_section,
1243 		     cris_elf_howto_table[r_type].name,
1244 		     rel->r_addend,
1245 		     symname[0] != '\0' ? symname : _("[whose name is lost]"));
1246 
1247 		bfd_set_error (bfd_error_bad_value);
1248 		return FALSE;
1249 	      }
1250 	  }
1251 	  break;
1252 
1253 	case R_CRIS_32_GOTREL:
1254 	  /* This relocation must only be performed against local symbols.
1255 	     It's also ok when we link a program and the symbol is either
1256 	     defined in an ordinary (non-DSO) object or is undefined weak.  */
1257 	  if (h != NULL
1258 	      && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
1259 	      && !(!info->shared
1260 		   && (h->def_regular
1261 		       || (!h->def_dynamic
1262 			   && h->root.type == bfd_link_hash_undefweak))))
1263 	    {
1264 	      (*_bfd_error_handler)
1265 		(_("%B, section %A: relocation %s is"
1266 		   " not allowed for global symbol: `%s'"),
1267 		 input_bfd,
1268 		 input_section,
1269 		 cris_elf_howto_table[r_type].name,
1270 		 symname);
1271 	      bfd_set_error (bfd_error_bad_value);
1272 	      return FALSE;
1273 	    }
1274 
1275 	  /* This can happen if we get a link error with the input ELF
1276 	     variant mismatching the output variant.  Emit an error so
1277 	     it's noticed if it happens elsewhere.  */
1278 	  if (sgot == NULL)
1279 	    {
1280 	      (*_bfd_error_handler)
1281 		(_("%B, section %A: relocation %s with no GOT created"),
1282 		 input_bfd,
1283 		 input_section,
1284 		 cris_elf_howto_table[r_type].name);
1285 	      bfd_set_error (bfd_error_bad_value);
1286 	      return FALSE;
1287 	    }
1288 
1289 	  /* This relocation is like a PC-relative one, except the
1290 	     reference point is the location of GOT.  Note that
1291 	     sgot->output_offset is not involved in this calculation.  We
1292 	     always want the start of entire .got section, not the
1293 	     position after the reserved header.  */
1294 	  relocation -= sgot->output_section->vma;
1295 	  break;
1296 
1297 	case R_CRIS_32_PLT_PCREL:
1298 	  /* Relocation is to the entry for this symbol in the
1299 	     procedure linkage table.  */
1300 
1301 	  /* Resolve a PLT_PCREL reloc against a local symbol directly,
1302 	     without using the procedure linkage table.  */
1303 	  if (h == NULL || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
1304 	    break;
1305 
1306 	  if (h->plt.offset == (bfd_vma) -1
1307 	      || splt == NULL)
1308 	    {
1309 	      /* We didn't make a PLT entry for this symbol.  This
1310 		 happens when statically linking PIC code, or when
1311 		 using -Bsymbolic.  */
1312 	      break;
1313 	    }
1314 
1315 	  relocation = (splt->output_section->vma
1316 			+ splt->output_offset
1317 			+ h->plt.offset);
1318 	  break;
1319 
1320 	case R_CRIS_32_PLT_GOTREL:
1321 	  /* Like R_CRIS_32_PLT_PCREL, but the reference point is the
1322 	     start of the .got section.  See also comment at
1323 	     R_CRIS_32_GOT.  */
1324 	  relocation -= sgot->output_section->vma;
1325 
1326 	  /* Resolve a PLT_GOTREL reloc against a local symbol directly,
1327 	     without using the procedure linkage table.  */
1328 	  if (h == NULL || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
1329 	    break;
1330 
1331 	  if (h->plt.offset == (bfd_vma) -1
1332 	      || splt == NULL)
1333 	    {
1334 	      /* We didn't make a PLT entry for this symbol.  This
1335 		 happens when statically linking PIC code, or when
1336 		 using -Bsymbolic.  */
1337 	      break;
1338 	    }
1339 
1340 	  relocation = (splt->output_section->vma
1341 			+ splt->output_offset
1342 			+ h->plt.offset
1343 			- sgot->output_section->vma);
1344 	  break;
1345 
1346 	case R_CRIS_8_PCREL:
1347 	case R_CRIS_16_PCREL:
1348 	case R_CRIS_32_PCREL:
1349 	  /* If the symbol was local, we need no shlib-specific handling.  */
1350 	  if (h == NULL || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
1351 	    break;
1352 
1353 	  /* Fall through.  */
1354 	case R_CRIS_8:
1355 	case R_CRIS_16:
1356 	case R_CRIS_32:
1357 	  if (info->shared
1358 	      && r_symndx != 0
1359 	      && (input_section->flags & SEC_ALLOC) != 0
1360 	      && ((r_type != R_CRIS_8_PCREL
1361 		   && r_type != R_CRIS_16_PCREL
1362 		   && r_type != R_CRIS_32_PCREL)
1363 		  || (!info->symbolic
1364 		      || !h->def_regular)))
1365 	    {
1366 	      Elf_Internal_Rela outrel;
1367 	      bfd_byte *loc;
1368 	      bfd_boolean skip, relocate;
1369 
1370 	      /* When generating a shared object, these relocations
1371 		 are copied into the output file to be resolved at run
1372 		 time.  */
1373 
1374 	      if (sreloc == NULL)
1375 		{
1376 		  const char *name;
1377 
1378 		  name = (bfd_elf_string_from_elf_section
1379 			  (input_bfd,
1380 			   elf_elfheader (input_bfd)->e_shstrndx,
1381 			   elf_section_data (input_section)->rel_hdr.sh_name));
1382 		  if (name == NULL)
1383 		    return FALSE;
1384 
1385 		  BFD_ASSERT (strncmp (name, ".rela", 5) == 0
1386 			      && strcmp (bfd_get_section_name (input_bfd,
1387 							       input_section),
1388 					 name + 5) == 0);
1389 
1390 		  sreloc = bfd_get_section_by_name (dynobj, name);
1391 
1392 		  /* That section should have been created in
1393 		     cris_elf_check_relocs, but that function will not be
1394 		     called for objects which fail in
1395 		     cris_elf_merge_private_bfd_data.  */
1396 		  if (sreloc == NULL)
1397 		    {
1398 		      (*_bfd_error_handler)
1399 			(_("%B: Internal inconsistency; no relocation section %s"),
1400 			 input_bfd,
1401 			 name);
1402 
1403 		      bfd_set_error (bfd_error_bad_value);
1404 		      return FALSE;
1405 		    }
1406 		}
1407 
1408 	      skip = FALSE;
1409 	      relocate = FALSE;
1410 
1411 	      outrel.r_offset =
1412 		_bfd_elf_section_offset (output_bfd, info, input_section,
1413 					 rel->r_offset);
1414 	      if (outrel.r_offset == (bfd_vma) -1)
1415 		skip = TRUE;
1416 	      else if (outrel.r_offset == (bfd_vma) -2)
1417 		skip = TRUE, relocate = TRUE;
1418 	      outrel.r_offset += (input_section->output_section->vma
1419 				  + input_section->output_offset);
1420 
1421 	      if (skip)
1422 		memset (&outrel, 0, sizeof outrel);
1423 	      /* h->dynindx may be -1 if the symbol was marked to
1424 		 become local.  */
1425 	      else if (h != NULL
1426 		       && ((! info->symbolic && h->dynindx != -1)
1427 			   || !h->def_regular))
1428 		{
1429 		  BFD_ASSERT (h->dynindx != -1);
1430 		  outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
1431 		  outrel.r_addend = relocation + rel->r_addend;
1432 		}
1433 	      else
1434 		{
1435 		  if (r_type == R_CRIS_32)
1436 		    {
1437 		      relocate = TRUE;
1438 		      outrel.r_info = ELF32_R_INFO (0, R_CRIS_RELATIVE);
1439 		      outrel.r_addend = relocation + rel->r_addend;
1440 		    }
1441 		  else
1442 		    {
1443 		      long indx;
1444 
1445 		      if (bfd_is_abs_section (sec))
1446 			indx = 0;
1447 		      else if (sec == NULL || sec->owner == NULL)
1448 			{
1449 			  bfd_set_error (bfd_error_bad_value);
1450 			  return FALSE;
1451 			}
1452 		      else
1453 			{
1454 			  asection *osec;
1455 
1456 			  osec = sec->output_section;
1457 			  indx = elf_section_data (osec)->dynindx;
1458 			  BFD_ASSERT (indx > 0);
1459 			}
1460 
1461 		      outrel.r_info = ELF32_R_INFO (indx, r_type);
1462 		      outrel.r_addend = relocation + rel->r_addend;
1463 		    }
1464 		}
1465 
1466 	      loc = sreloc->contents;
1467 	      loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
1468 	      bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
1469 
1470 	      /* This reloc will be computed at runtime, so there's no
1471                  need to do anything now, except for R_CRIS_32 relocations
1472                  that have been turned into R_CRIS_RELATIVE.  */
1473 	      if (!relocate)
1474 		continue;
1475 	    }
1476 
1477 	  break;
1478 	}
1479 
1480       r = cris_final_link_relocate (howto, input_bfd, input_section,
1481 				     contents, rel, relocation);
1482 
1483       if (r != bfd_reloc_ok)
1484 	{
1485 	  const char * msg = (const char *) NULL;
1486 
1487 	  switch (r)
1488 	    {
1489 	    case bfd_reloc_overflow:
1490 	      r = info->callbacks->reloc_overflow
1491 		(info, (h ? &h->root : NULL), symname, howto->name,
1492 		 (bfd_vma) 0, input_bfd, input_section, rel->r_offset);
1493 	      break;
1494 
1495 	    case bfd_reloc_undefined:
1496 	      r = info->callbacks->undefined_symbol
1497 		(info, symname, input_bfd, input_section, rel->r_offset,
1498 		 TRUE);
1499 	      break;
1500 
1501 	    case bfd_reloc_outofrange:
1502 	      msg = _("internal error: out of range error");
1503 	      break;
1504 
1505 	    case bfd_reloc_notsupported:
1506 	      msg = _("internal error: unsupported relocation error");
1507 	      break;
1508 
1509 	    case bfd_reloc_dangerous:
1510 	      msg = _("internal error: dangerous relocation");
1511 	      break;
1512 
1513 	    default:
1514 	      msg = _("internal error: unknown error");
1515 	      break;
1516 	    }
1517 
1518 	  if (msg)
1519 	    r = info->callbacks->warning
1520 	      (info, msg, symname, input_bfd, input_section, rel->r_offset);
1521 
1522 	  if (! r)
1523 	    return FALSE;
1524 	}
1525     }
1526 
1527   return TRUE;
1528 }
1529 
1530 /* Finish up dynamic symbol handling.  We set the contents of various
1531    dynamic sections here.  */
1532 
1533 static bfd_boolean
elf_cris_finish_dynamic_symbol(output_bfd,info,h,sym)1534 elf_cris_finish_dynamic_symbol (output_bfd, info, h, sym)
1535      bfd *output_bfd;
1536      struct bfd_link_info *info;
1537      struct elf_link_hash_entry *h;
1538      Elf_Internal_Sym *sym;
1539 {
1540   bfd *dynobj;
1541 
1542   /* Where in the plt entry to put values.  */
1543   int plt_off1 = 2, plt_off2 = 10, plt_off3 = 16;
1544 
1545   /* What offset to add to the distance to the first PLT entry for the
1546      value at plt_off3.   */
1547   int plt_off3_value_bias = 4;
1548 
1549   /* Where in the PLT entry the call-dynlink-stub is (happens to be same
1550      for PIC and non-PIC for v32 and pre-v32).  */
1551   int plt_stub_offset = 8;
1552   int plt_entry_size = PLT_ENTRY_SIZE;
1553   const bfd_byte *plt_entry = elf_cris_plt_entry;
1554   const bfd_byte *plt_pic_entry = elf_cris_pic_plt_entry;
1555 
1556   /* Adjust the various PLT entry offsets.  */
1557   if (bfd_get_mach (output_bfd) == bfd_mach_cris_v32)
1558     {
1559       plt_off2 = 14;
1560       plt_off3 = 20;
1561       plt_off3_value_bias = -2;
1562       plt_stub_offset = 12;
1563       plt_entry_size = PLT_ENTRY_SIZE_V32;
1564       plt_entry = elf_cris_plt_entry_v32;
1565       plt_pic_entry = elf_cris_pic_plt_entry_v32;
1566     }
1567 
1568   dynobj = elf_hash_table (info)->dynobj;
1569 
1570   if (h->plt.offset != (bfd_vma) -1)
1571     {
1572       asection *splt;
1573       asection *sgotplt;
1574       asection *sgot;
1575       asection *srela;
1576       bfd_vma got_base;
1577 
1578       bfd_vma gotplt_offset
1579 	= ((struct elf_cris_link_hash_entry *) h)->gotplt_offset;
1580       Elf_Internal_Rela rela;
1581       bfd_byte *loc;
1582       bfd_boolean has_gotplt = gotplt_offset != 0;
1583 
1584       /* Get the index in the procedure linkage table which
1585 	 corresponds to this symbol.  This is the index of this symbol
1586 	 in all the symbols for which we are making plt entries.  The
1587 	 first entry in the procedure linkage table is reserved.  */
1588       /* We have to count backwards here, and the result is only valid as
1589 	 an index into .got.plt and its relocations.  FIXME: Constants...  */
1590       bfd_vma gotplt_index = gotplt_offset/4 - 3;
1591 
1592       /* Get the offset into the .got table of the entry that corresponds
1593 	 to this function.  Note that we embed knowledge that "incoming"
1594 	 .got goes after .got.plt in the output without padding (pointer
1595 	 aligned).  However, that knowledge is present in several other
1596 	 places too.  */
1597       bfd_vma got_offset
1598 	= (has_gotplt
1599 	   ? gotplt_offset
1600 	   : h->got.offset + elf_cris_hash_table(info)->next_gotplt_entry);
1601 
1602       /* This symbol has an entry in the procedure linkage table.  Set it
1603 	 up.  */
1604 
1605       BFD_ASSERT (h->dynindx != -1);
1606 
1607       splt = bfd_get_section_by_name (dynobj, ".plt");
1608       sgot = bfd_get_section_by_name (dynobj, ".got");
1609       sgotplt = bfd_get_section_by_name (dynobj, ".got.plt");
1610       srela = bfd_get_section_by_name (dynobj, ".rela.plt");
1611       BFD_ASSERT (splt != NULL && sgotplt != NULL
1612 		  && (! has_gotplt || srela != NULL));
1613 
1614       got_base = sgotplt->output_section->vma + sgotplt->output_offset;
1615 
1616       /* Fill in the entry in the procedure linkage table.  */
1617       if (! info->shared)
1618 	{
1619 	  memcpy (splt->contents + h->plt.offset, plt_entry,
1620 		  plt_entry_size);
1621 
1622 	  /* We need to enter the absolute address of the GOT entry here.  */
1623 	  bfd_put_32 (output_bfd, got_base + got_offset,
1624 		      splt->contents + h->plt.offset + plt_off1);
1625 	}
1626       else
1627 	{
1628 	  memcpy (splt->contents + h->plt.offset, plt_pic_entry,
1629 		  plt_entry_size);
1630 	  bfd_put_32 (output_bfd, got_offset,
1631 		      splt->contents + h->plt.offset + plt_off1);
1632 	}
1633 
1634       /* Fill in the plt entry and make a relocation, if this is a "real"
1635 	 PLT entry.  */
1636       if (has_gotplt)
1637 	{
1638 	  /* Fill in the offset to the reloc table.  */
1639 	  bfd_put_32 (output_bfd,
1640 		      gotplt_index * sizeof (Elf32_External_Rela),
1641 		      splt->contents + h->plt.offset + plt_off2);
1642 
1643 	  /* Fill in the offset to the first PLT entry, where to "jump".  */
1644 	  bfd_put_32 (output_bfd,
1645 		      - (h->plt.offset + plt_off3 + plt_off3_value_bias),
1646 		      splt->contents + h->plt.offset + plt_off3);
1647 
1648 	  /* Fill in the entry in the global offset table with the address of
1649 	     the relocating stub.  */
1650 	  bfd_put_32 (output_bfd,
1651 		      (splt->output_section->vma
1652 		       + splt->output_offset
1653 		       + h->plt.offset
1654 		       + plt_stub_offset),
1655 		      sgotplt->contents + got_offset);
1656 
1657 	  /* Fill in the entry in the .rela.plt section.  */
1658 	  rela.r_offset = (sgotplt->output_section->vma
1659 			   + sgotplt->output_offset
1660 			   + got_offset);
1661 	  rela.r_info = ELF32_R_INFO (h->dynindx, R_CRIS_JUMP_SLOT);
1662 	  rela.r_addend = 0;
1663 	  loc = srela->contents + gotplt_index * sizeof (Elf32_External_Rela);
1664 	  bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
1665 	}
1666 
1667       if (!h->def_regular)
1668 	{
1669 	  /* Mark the symbol as undefined, rather than as defined in
1670 	     the .plt section.  Leave the value alone.  */
1671 	  sym->st_shndx = SHN_UNDEF;
1672 
1673 	  /* FIXME: From elf32-sparc.c 2001-02-19 (1.18).  I still don't
1674 	     know whether resetting the value is significant; if it really
1675 	     is, rather than a quirk or bug in the sparc port, then I
1676 	     believe we'd see this elsewhere.  */
1677 	  /* If the symbol is weak, we do need to clear the value.
1678 	     Otherwise, the PLT entry would provide a definition for
1679 	     the symbol even if the symbol wasn't defined anywhere,
1680 	     and so the symbol would never be NULL.  */
1681 	  if (!h->ref_regular_nonweak)
1682 	    sym->st_value = 0;
1683 	}
1684     }
1685 
1686   /* For an ordinary program, we emit .got relocs only for symbols that
1687      are in the dynamic-symbols table and are either defined by the
1688      program or are undefined weak symbols, or are function symbols
1689      where we do not output a PLT: the PLT reloc was output above and all
1690      references to the function symbol are redirected to the PLT.  */
1691   if (h->got.offset != (bfd_vma) -1
1692       && (info->shared
1693 	  || (h->dynindx != -1
1694 	      && h->plt.offset == (bfd_vma) -1
1695 	      && !h->def_regular
1696 	      && h->root.type != bfd_link_hash_undefweak)))
1697     {
1698       asection *sgot;
1699       asection *srela;
1700       Elf_Internal_Rela rela;
1701       bfd_byte *loc;
1702       bfd_byte *where;
1703 
1704       /* This symbol has an entry in the global offset table.  Set it up.  */
1705 
1706       sgot = bfd_get_section_by_name (dynobj, ".got");
1707       srela = bfd_get_section_by_name (dynobj, ".rela.got");
1708       BFD_ASSERT (sgot != NULL && srela != NULL);
1709 
1710       rela.r_offset = (sgot->output_section->vma
1711 		       + sgot->output_offset
1712 		       + (h->got.offset &~ (bfd_vma) 1));
1713 
1714       /* If this is a static link, or it is a -Bsymbolic link and the
1715 	 symbol is defined locally or was forced to be local because
1716 	 of a version file, we just want to emit a RELATIVE reloc.
1717 	 The entry in the global offset table will already have been
1718 	 initialized in the relocate_section function.  */
1719       where = sgot->contents + (h->got.offset &~ (bfd_vma) 1);
1720       if (! elf_hash_table (info)->dynamic_sections_created
1721 	  || (info->shared
1722 	      && (info->symbolic || h->dynindx == -1)
1723 	      && h->def_regular))
1724 	{
1725 	  rela.r_info = ELF32_R_INFO (0, R_CRIS_RELATIVE);
1726 	  rela.r_addend = bfd_get_signed_32 (output_bfd, where);
1727 	}
1728       else
1729 	{
1730 	  bfd_put_32 (output_bfd, (bfd_vma) 0, where);
1731 	  rela.r_info = ELF32_R_INFO (h->dynindx, R_CRIS_GLOB_DAT);
1732 	  rela.r_addend = 0;
1733 	}
1734 
1735       loc = srela->contents;
1736       loc += srela->reloc_count++ * sizeof (Elf32_External_Rela);
1737       bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
1738     }
1739 
1740   if (h->needs_copy)
1741     {
1742       asection *s;
1743       Elf_Internal_Rela rela;
1744       bfd_byte *loc;
1745 
1746       /* This symbol needs a copy reloc.  Set it up.  */
1747 
1748       BFD_ASSERT (h->dynindx != -1
1749 		  && (h->root.type == bfd_link_hash_defined
1750 		      || h->root.type == bfd_link_hash_defweak));
1751 
1752       s = bfd_get_section_by_name (h->root.u.def.section->owner,
1753 				   ".rela.bss");
1754       BFD_ASSERT (s != NULL);
1755 
1756       rela.r_offset = (h->root.u.def.value
1757 		       + h->root.u.def.section->output_section->vma
1758 		       + h->root.u.def.section->output_offset);
1759       rela.r_info = ELF32_R_INFO (h->dynindx, R_CRIS_COPY);
1760       rela.r_addend = 0;
1761       loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
1762       bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
1763     }
1764 
1765   /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute.  */
1766   if (strcmp (h->root.root.string, "_DYNAMIC") == 0
1767       || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
1768     sym->st_shndx = SHN_ABS;
1769 
1770   return TRUE;
1771 }
1772 
1773 /* Finish up the dynamic sections.  */
1774 
1775 static bfd_boolean
elf_cris_finish_dynamic_sections(output_bfd,info)1776 elf_cris_finish_dynamic_sections (output_bfd, info)
1777      bfd *output_bfd;
1778      struct bfd_link_info *info;
1779 {
1780   bfd *dynobj;
1781   asection *sgot;
1782   asection *sdyn;
1783 
1784   dynobj = elf_hash_table (info)->dynobj;
1785 
1786   sgot = bfd_get_section_by_name (dynobj, ".got.plt");
1787   BFD_ASSERT (sgot != NULL);
1788   sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
1789 
1790   if (elf_hash_table (info)->dynamic_sections_created)
1791     {
1792       asection *splt;
1793       Elf32_External_Dyn *dyncon, *dynconend;
1794 
1795       splt = bfd_get_section_by_name (dynobj, ".plt");
1796       BFD_ASSERT (splt != NULL && sdyn != NULL);
1797 
1798       dyncon = (Elf32_External_Dyn *) sdyn->contents;
1799       dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
1800       for (; dyncon < dynconend; dyncon++)
1801 	{
1802 	  Elf_Internal_Dyn dyn;
1803 	  asection *s;
1804 
1805 	  bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
1806 
1807 	  switch (dyn.d_tag)
1808 	    {
1809 	    default:
1810 	      break;
1811 
1812 	    case DT_PLTGOT:
1813 	      s = bfd_get_section_by_name (output_bfd, ".got");
1814 	      BFD_ASSERT (s != NULL);
1815 	      dyn.d_un.d_ptr = s->vma;
1816 	      bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
1817 	      break;
1818 
1819 	    case DT_JMPREL:
1820 	      /* Yes, we *can* have a .plt and no .plt.rela, for instance
1821 		 if all symbols are found in the .got (not .got.plt).  */
1822 	      s = bfd_get_section_by_name (output_bfd, ".rela.plt");
1823 	      dyn.d_un.d_ptr = s != NULL ? s->vma : 0;
1824 	      bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
1825 	      break;
1826 
1827 	    case DT_PLTRELSZ:
1828 	      s = bfd_get_section_by_name (output_bfd, ".rela.plt");
1829 	      if (s == NULL)
1830 		dyn.d_un.d_val = 0;
1831 	      else
1832 		dyn.d_un.d_val = s->size;
1833 	      bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
1834 	      break;
1835 
1836 	    case DT_RELASZ:
1837 	      /* The procedure linkage table relocs (DT_JMPREL) should
1838 		 not be included in the overall relocs (DT_RELA).
1839 		 Therefore, we override the DT_RELASZ entry here to
1840 		 make it not include the JMPREL relocs.  Since the
1841 		 linker script arranges for .rela.plt to follow all
1842 		 other relocation sections, we don't have to worry
1843 		 about changing the DT_RELA entry.  */
1844 	      s = bfd_get_section_by_name (output_bfd, ".rela.plt");
1845 	      if (s != NULL)
1846 		dyn.d_un.d_val -= s->size;
1847 	      bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
1848 	      break;
1849 	    }
1850 	}
1851 
1852       /* Fill in the first entry in the procedure linkage table.  */
1853       if (splt->size > 0)
1854 	{
1855 	  if (bfd_get_mach (output_bfd) == bfd_mach_cris_v32)
1856 	    {
1857 	      if (info->shared)
1858 		memcpy (splt->contents, elf_cris_pic_plt0_entry_v32,
1859 			PLT_ENTRY_SIZE_V32);
1860 	      else
1861 		{
1862 		  memcpy (splt->contents, elf_cris_plt0_entry_v32,
1863 			  PLT_ENTRY_SIZE_V32);
1864 		  bfd_put_32 (output_bfd,
1865 			      sgot->output_section->vma
1866 			      + sgot->output_offset + 4,
1867 			      splt->contents + 4);
1868 
1869 		  elf_section_data (splt->output_section)->this_hdr.sh_entsize
1870 		    = PLT_ENTRY_SIZE_V32;
1871 		}
1872 	    }
1873 	  else
1874 	    {
1875 	      if (info->shared)
1876 		memcpy (splt->contents, elf_cris_pic_plt0_entry,
1877 			PLT_ENTRY_SIZE);
1878 	      else
1879 		{
1880 		  memcpy (splt->contents, elf_cris_plt0_entry,
1881 			  PLT_ENTRY_SIZE);
1882 		  bfd_put_32 (output_bfd,
1883 			      sgot->output_section->vma
1884 			      + sgot->output_offset + 4,
1885 			      splt->contents + 6);
1886 		  bfd_put_32 (output_bfd,
1887 			      sgot->output_section->vma
1888 			      + sgot->output_offset + 8,
1889 			      splt->contents + 14);
1890 
1891 		  elf_section_data (splt->output_section)->this_hdr.sh_entsize
1892 		    = PLT_ENTRY_SIZE;
1893 		}
1894             }
1895 	}
1896     }
1897 
1898   /* Fill in the first three entries in the global offset table.  */
1899   if (sgot->size > 0)
1900     {
1901       if (sdyn == NULL)
1902 	bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents);
1903       else
1904 	bfd_put_32 (output_bfd,
1905 		    sdyn->output_section->vma + sdyn->output_offset,
1906 		    sgot->contents);
1907       bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 4);
1908       bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 8);
1909     }
1910 
1911   elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4;
1912 
1913   return TRUE;
1914 }
1915 
1916 /* Return the section that should be marked against GC for a given
1917    relocation.  */
1918 
1919 static asection *
cris_elf_gc_mark_hook(sec,info,rel,h,sym)1920 cris_elf_gc_mark_hook (sec, info, rel, h, sym)
1921      asection *sec;
1922      struct bfd_link_info *info ATTRIBUTE_UNUSED;
1923      Elf_Internal_Rela *rel;
1924      struct elf_link_hash_entry *h;
1925      Elf_Internal_Sym *sym;
1926 {
1927   if (h != NULL)
1928     {
1929       switch (ELF32_R_TYPE (rel->r_info))
1930 	{
1931 	case R_CRIS_GNU_VTINHERIT:
1932 	case R_CRIS_GNU_VTENTRY:
1933 	  break;
1934 
1935 	default:
1936 	  switch (h->root.type)
1937 	    {
1938 	    case bfd_link_hash_defined:
1939 	    case bfd_link_hash_defweak:
1940 	      return h->root.u.def.section;
1941 
1942 	    case bfd_link_hash_common:
1943 	      return h->root.u.c.p->section;
1944 
1945 	    default:
1946 	      break;
1947 	    }
1948 	}
1949     }
1950   else
1951     return bfd_section_from_elf_index (sec->owner, sym->st_shndx);
1952 
1953   return NULL;
1954 }
1955 
1956 /* Update the got entry reference counts for the section being removed.  */
1957 
1958 static bfd_boolean
cris_elf_gc_sweep_hook(abfd,info,sec,relocs)1959 cris_elf_gc_sweep_hook (abfd, info, sec, relocs)
1960      bfd *abfd ATTRIBUTE_UNUSED;
1961      struct bfd_link_info *info ATTRIBUTE_UNUSED;
1962      asection *sec ATTRIBUTE_UNUSED;
1963      const Elf_Internal_Rela *relocs ATTRIBUTE_UNUSED;
1964 {
1965   Elf_Internal_Shdr *symtab_hdr;
1966   struct elf_link_hash_entry **sym_hashes;
1967   bfd_signed_vma *local_got_refcounts;
1968   const Elf_Internal_Rela *rel, *relend;
1969   bfd *dynobj;
1970   asection *sgot;
1971   asection *srelgot;
1972 
1973   dynobj = elf_hash_table (info)->dynobj;
1974   if (dynobj == NULL)
1975     return TRUE;
1976 
1977   symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
1978   sym_hashes = elf_sym_hashes (abfd);
1979   local_got_refcounts = elf_local_got_refcounts (abfd);
1980 
1981   sgot = bfd_get_section_by_name (dynobj, ".got");
1982   srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
1983 
1984   relend = relocs + sec->reloc_count;
1985   for (rel = relocs; rel < relend; rel++)
1986     {
1987       unsigned long r_symndx;
1988       struct elf_link_hash_entry *h = NULL;
1989 
1990       r_symndx = ELF32_R_SYM (rel->r_info);
1991       if (r_symndx >= symtab_hdr->sh_info)
1992 	{
1993 	  h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1994 	  while (h->root.type == bfd_link_hash_indirect
1995 		 || h->root.type == bfd_link_hash_warning)
1996 	    h = (struct elf_link_hash_entry *) h->root.u.i.link;
1997 	}
1998 
1999       switch (ELF32_R_TYPE (rel->r_info))
2000 	{
2001 	case R_CRIS_16_GOT:
2002 	case R_CRIS_32_GOT:
2003 	  if (h != NULL)
2004 	    {
2005 	      if (h->got.refcount > 0)
2006 		{
2007 		  --h->got.refcount;
2008 		  if (h->got.refcount == 0)
2009 		    {
2010 		      /* We don't need the .got entry any more.  */
2011 		      sgot->size -= 4;
2012 		      srelgot->size -= sizeof (Elf32_External_Rela);
2013 		    }
2014 		}
2015 	      break;
2016 	    }
2017 
2018 	local_got_reloc:
2019 	  if (local_got_refcounts != NULL)
2020 	    {
2021 	      if (local_got_refcounts[r_symndx] > 0)
2022 		{
2023 		  --local_got_refcounts[r_symndx];
2024 		  if (local_got_refcounts[r_symndx] == 0)
2025 		    {
2026 		      /* We don't need the .got entry any more.  */
2027 		      sgot->size -= 4;
2028 		      if (info->shared)
2029 			srelgot->size -= sizeof (Elf32_External_Rela);
2030 		    }
2031 		}
2032 	    }
2033 	  break;
2034 
2035 	case R_CRIS_16_GOTPLT:
2036 	case R_CRIS_32_GOTPLT:
2037 	  /* For local symbols, treat these like GOT relocs.  */
2038 	  if (h == NULL)
2039 	    goto local_got_reloc;
2040 	  /* Fall through.  */
2041 
2042 	case R_CRIS_32_PLT_GOTREL:
2043 	  /* FIXME: We don't garbage-collect away the .got section.  */
2044 	  if (local_got_refcounts != NULL)
2045 	    local_got_refcounts[-1]--;
2046 	  /* Fall through.  */
2047 
2048 	case R_CRIS_8_PCREL:
2049 	case R_CRIS_16_PCREL:
2050 	case R_CRIS_32_PCREL:
2051 	case R_CRIS_32_PLT_PCREL:
2052 	  if (h != NULL)
2053 	    {
2054 	      if (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
2055 		  && h->plt.refcount > 0)
2056 		--h->plt.refcount;
2057 	    }
2058 	  break;
2059 
2060 	default:
2061 	  break;
2062 	}
2063     }
2064 
2065   return TRUE;
2066 }
2067 
2068 /* Make sure we emit a GOT entry if the symbol was supposed to have a PLT
2069    entry but we found we will not create any.  Called when we find we will
2070    not have any PLT for this symbol, by for example
2071    elf_cris_adjust_dynamic_symbol when we're doing a proper dynamic link,
2072    or elf_cris_size_dynamic_sections if no dynamic sections will be
2073    created (we're only linking static objects).  */
2074 
2075 static bfd_boolean
elf_cris_adjust_gotplt_to_got(h,p)2076 elf_cris_adjust_gotplt_to_got (h, p)
2077      struct elf_cris_link_hash_entry *h;
2078      PTR p;
2079 {
2080   struct bfd_link_info *info = (struct bfd_link_info *) p;
2081   bfd *dynobj = elf_hash_table (info)->dynobj;
2082 
2083   BFD_ASSERT (dynobj != NULL);
2084 
2085   if (h->root.root.type == bfd_link_hash_warning)
2086     h = (struct elf_cris_link_hash_entry *) h->root.root.u.i.link;
2087 
2088   /* If nobody wanted a GOTPLT with this symbol, we're done.  */
2089   if (h->gotplt_refcount <= 0)
2090     return TRUE;
2091 
2092   if (h->root.got.refcount > 0)
2093     {
2094       /* There's a GOT entry for this symbol.  Just adjust the refcount.
2095 	 Probably not necessary at this stage, but keeping it accurate
2096 	 helps avoiding surprises later.  */
2097       h->root.got.refcount += h->gotplt_refcount;
2098       h->gotplt_refcount = 0;
2099     }
2100   else
2101     {
2102       /* No GOT entry for this symbol.  We need to create one.  */
2103       asection *sgot = bfd_get_section_by_name (dynobj, ".got");
2104       asection *srelgot
2105 	= bfd_get_section_by_name (dynobj, ".rela.got");
2106 
2107       /* Put an accurate refcount there.  */
2108       h->root.got.refcount = h->gotplt_refcount;
2109 
2110       h->gotplt_refcount = 0;
2111 
2112       /* We always have a .got and a .rela.got section if there were
2113 	 GOTPLT relocs in input.  */
2114       BFD_ASSERT (sgot != NULL && srelgot != NULL);
2115 
2116       /* Allocate space in the .got section.  */
2117       sgot->size += 4;
2118 
2119       /* Allocate relocation space.  */
2120       srelgot->size += sizeof (Elf32_External_Rela);
2121     }
2122 
2123   return TRUE;
2124 }
2125 
2126 /* Try to fold PLT entries with GOT entries.  There are two cases when we
2127    want to do this:
2128 
2129    - When all PLT references are GOTPLT references, and there are GOT
2130      references, and this is not the executable.  We don't have to
2131      generate a PLT at all.
2132 
2133    - When there are both (ordinary) PLT references and GOT references,
2134      and this isn't the executable.
2135      We want to make the PLT reference use the ordinary GOT entry rather
2136      than R_CRIS_JUMP_SLOT, a run-time dynamically resolved GOTPLT entry,
2137      since the GOT entry will have to be resolved at startup anyway.
2138 
2139    Though the latter case is handled when room for the PLT is allocated,
2140    not here.
2141 
2142    By folding into the GOT, we may need a round-trip to a PLT in the
2143    executable for calls, a loss in performance.  Still, losing a
2144    reloc is a win in size and at least in start-up time.
2145 
2146    Note that this function is called before symbols are forced local by
2147    version scripts.  The differing cases are handled by
2148    elf_cris_hide_symbol.  */
2149 
2150 static bfd_boolean
elf_cris_try_fold_plt_to_got(h,p)2151 elf_cris_try_fold_plt_to_got (h, p)
2152      struct elf_cris_link_hash_entry *h;
2153      PTR p;
2154 {
2155   struct bfd_link_info *info = (struct bfd_link_info *) p;
2156 
2157   /* If there are no GOT references for this symbol, we can't fold any
2158      other reference so there's nothing to do.  Likewise if there are no
2159      PLT references; GOTPLT references included.  */
2160   if (h->root.got.refcount <= 0 || h->root.plt.refcount <= 0)
2161     return TRUE;
2162 
2163   /* GOTPLT relocs are supposed to be included into the PLT refcount.  */
2164   BFD_ASSERT (h->gotplt_refcount <= h->root.plt.refcount);
2165 
2166   if (h->gotplt_refcount == h->root.plt.refcount)
2167     {
2168       /* The only PLT references are GOTPLT references, and there are GOT
2169 	 references.  Convert PLT to GOT references.  */
2170       if (! elf_cris_adjust_gotplt_to_got (h, info))
2171 	return FALSE;
2172 
2173       /* Clear the PLT references, so no PLT will be created.  */
2174       h->root.plt.offset = (bfd_vma) -1;
2175     }
2176 
2177   return TRUE;
2178 }
2179 
2180 /* Our own version of hide_symbol, so that we can adjust a GOTPLT reloc
2181    to use a GOT entry (and create one) rather than requiring a GOTPLT
2182    entry.  */
2183 
2184 static void
elf_cris_hide_symbol(info,h,force_local)2185 elf_cris_hide_symbol (info, h, force_local)
2186      struct bfd_link_info *info;
2187      struct elf_link_hash_entry *h;
2188      bfd_boolean force_local;
2189 {
2190   elf_cris_adjust_gotplt_to_got ((struct elf_cris_link_hash_entry *) h, info);
2191 
2192   _bfd_elf_link_hash_hide_symbol (info, h, force_local);
2193 }
2194 
2195 /* Adjust a symbol defined by a dynamic object and referenced by a
2196    regular object.  The current definition is in some section of the
2197    dynamic object, but we're not including those sections.  We have to
2198    change the definition to something the rest of the link can
2199    understand.  */
2200 
2201 static bfd_boolean
elf_cris_adjust_dynamic_symbol(info,h)2202 elf_cris_adjust_dynamic_symbol (info, h)
2203      struct bfd_link_info *info;
2204      struct elf_link_hash_entry *h;
2205 {
2206   bfd *dynobj;
2207   asection *s;
2208   unsigned int power_of_two;
2209   bfd_size_type plt_entry_size;
2210 
2211   dynobj = elf_hash_table (info)->dynobj;
2212 
2213   /* Make sure we know what is going on here.  */
2214   BFD_ASSERT (dynobj != NULL
2215 	      && (h->needs_plt
2216 		  || h->u.weakdef != NULL
2217 		  || (h->def_dynamic
2218 		      && h->ref_regular
2219 		      && !h->def_regular)));
2220 
2221   plt_entry_size
2222     = (bfd_get_mach (dynobj) == bfd_mach_cris_v32
2223        ? PLT_ENTRY_SIZE_V32 : PLT_ENTRY_SIZE);
2224 
2225   /* If this is a function, put it in the procedure linkage table.  We
2226      will fill in the contents of the procedure linkage table later,
2227      when we know the address of the .got section.  */
2228   if (h->type == STT_FUNC
2229       || h->needs_plt)
2230     {
2231       /* If we link a program (not a DSO), we'll get rid of unnecessary
2232 	 PLT entries; we point to the actual symbols -- even for pic
2233 	 relocs, because a program built with -fpic should have the same
2234 	 result as one built without -fpic, specifically considering weak
2235 	 symbols.
2236 	 FIXME: m68k and i386 differ here, for unclear reasons.  */
2237       if (! info->shared
2238 	  && !h->def_dynamic)
2239 	{
2240 	  /* This case can occur if we saw a PLT reloc in an input file,
2241 	     but the symbol was not defined by a dynamic object.  In such
2242 	     a case, we don't actually need to build a procedure linkage
2243 	     table, and we can just do an absolute or PC reloc instead, or
2244 	     change a .got.plt index to a .got index for GOTPLT relocs.  */
2245 	  BFD_ASSERT (h->needs_plt);
2246 	  h->needs_plt = 0;
2247 	  h->plt.offset = (bfd_vma) -1;
2248 	  return
2249 	    elf_cris_adjust_gotplt_to_got ((struct
2250 					    elf_cris_link_hash_entry *) h,
2251 					   info);
2252 	}
2253 
2254       /* If we had a R_CRIS_GLOB_DAT that didn't have to point to a PLT;
2255 	 where a pointer-equivalent symbol was unimportant (i.e. more
2256 	 like R_CRIS_JUMP_SLOT after symbol evaluation) we could get rid
2257 	 of the PLT.  We can't for the executable, because the GOT
2258 	 entries will point to the PLT there (and be constant).  */
2259       if (info->shared
2260 	  && !elf_cris_try_fold_plt_to_got ((struct elf_cris_link_hash_entry*)
2261 					    h, info))
2262 	return FALSE;
2263 
2264       /* GC or folding may have rendered this entry unused.  */
2265       if (h->plt.refcount <= 0)
2266 	{
2267 	  h->needs_plt = 0;
2268 	  h->plt.offset = (bfd_vma) -1;
2269 	  return TRUE;
2270 	}
2271 
2272       /* Make sure this symbol is output as a dynamic symbol.  */
2273       if (h->dynindx == -1)
2274 	{
2275 	  if (! bfd_elf_link_record_dynamic_symbol (info, h))
2276 	    return FALSE;
2277 	}
2278 
2279       s = bfd_get_section_by_name (dynobj, ".plt");
2280       BFD_ASSERT (s != NULL);
2281 
2282       /* If this is the first .plt entry, make room for the special
2283 	 first entry.  */
2284       if (s->size == 0)
2285 	s->size += plt_entry_size;
2286 
2287       /* If this symbol is not defined in a regular file, and we are
2288 	 not generating a shared library, then set the symbol to this
2289 	 location in the .plt.  */
2290       if (!info->shared
2291 	  && !h->def_regular)
2292 	{
2293 	  h->root.u.def.section = s;
2294 	  h->root.u.def.value = s->size;
2295 	}
2296 
2297       /* If there's already a GOT entry, use that, not a .got.plt.  A
2298 	 GOT field still has a reference count when we get here; it's
2299 	 not yet changed to an offset.  We can't do this for an
2300 	 executable, because then the reloc associated with the PLT
2301 	 would get a non-PLT reloc pointing to the PLT.  FIXME: Move
2302 	 this to elf_cris_try_fold_plt_to_got.  */
2303       if (info->shared && h->got.refcount > 0)
2304 	{
2305 	  h->got.refcount += h->plt.refcount;
2306 
2307 	  /* Mark the PLT offset to use the GOT entry by setting the low
2308 	     bit in the plt offset; it is always a multiple of
2309 	     plt_entry_size (which is at least a multiple of 2).  */
2310 	  BFD_ASSERT ((s->size % plt_entry_size) == 0);
2311 
2312 	  /* Change the PLT refcount to an offset.  */
2313 	  h->plt.offset = s->size;
2314 
2315 	  /* By not setting gotplt_offset (i.e. it remains at 0), we signal
2316 	     that the got entry should be used instead.  */
2317 	  BFD_ASSERT (((struct elf_cris_link_hash_entry *)
2318 		       h)->gotplt_offset == 0);
2319 
2320 	  /* Make room for this entry.  */
2321 	  s->size += plt_entry_size;
2322 
2323 	  return TRUE;
2324 	}
2325 
2326       /* No GOT reference for this symbol; prepare for an ordinary PLT.  */
2327       h->plt.offset = s->size;
2328 
2329       /* Make room for this entry.  */
2330       s->size += plt_entry_size;
2331 
2332       /* We also need to make an entry in the .got.plt section, which
2333 	 will be placed in the .got section by the linker script.  */
2334       ((struct elf_cris_link_hash_entry *) h)->gotplt_offset
2335 	= elf_cris_hash_table (info)->next_gotplt_entry;
2336       elf_cris_hash_table (info)->next_gotplt_entry += 4;
2337 
2338       s = bfd_get_section_by_name (dynobj, ".got.plt");
2339       BFD_ASSERT (s != NULL);
2340       s->size += 4;
2341 
2342       /* We also need to make an entry in the .rela.plt section.  */
2343 
2344       s = bfd_get_section_by_name (dynobj, ".rela.plt");
2345       BFD_ASSERT (s != NULL);
2346       s->size += sizeof (Elf32_External_Rela);
2347 
2348       return TRUE;
2349     }
2350 
2351   /* Reinitialize the plt offset now that it is not used as a reference
2352      count any more.  */
2353   h->plt.offset = (bfd_vma) -1;
2354 
2355   /* If this is a weak symbol, and there is a real definition, the
2356      processor independent code will have arranged for us to see the
2357      real definition first, and we can just use the same value.  */
2358   if (h->u.weakdef != NULL)
2359     {
2360       BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
2361 		  || h->u.weakdef->root.type == bfd_link_hash_defweak);
2362       h->root.u.def.section = h->u.weakdef->root.u.def.section;
2363       h->root.u.def.value = h->u.weakdef->root.u.def.value;
2364       return TRUE;
2365     }
2366 
2367   /* This is a reference to a symbol defined by a dynamic object which
2368      is not a function.  */
2369 
2370   /* If we are creating a shared library, we must presume that the
2371      only references to the symbol are via the global offset table.
2372      For such cases we need not do anything here; the relocations will
2373      be handled correctly by relocate_section.  */
2374   if (info->shared)
2375     return TRUE;
2376 
2377   /* If there are no references to this symbol that do not use the
2378      GOT, we don't need to generate a copy reloc.  */
2379   if (!h->non_got_ref)
2380     return TRUE;
2381 
2382   /* We must allocate the symbol in our .dynbss section, which will
2383      become part of the .bss section of the executable.  There will be
2384      an entry for this symbol in the .dynsym section.  The dynamic
2385      object will contain position independent code, so all references
2386      from the dynamic object to this symbol will go through the global
2387      offset table.  The dynamic linker will use the .dynsym entry to
2388      determine the address it must put in the global offset table, so
2389      both the dynamic object and the regular object will refer to the
2390      same memory location for the variable.  */
2391 
2392   s = bfd_get_section_by_name (dynobj, ".dynbss");
2393   BFD_ASSERT (s != NULL);
2394 
2395   /* We must generate a R_CRIS_COPY reloc to tell the dynamic linker to
2396      copy the initial value out of the dynamic object and into the
2397      runtime process image.  We need to remember the offset into the
2398      .rela.bss section we are going to use.  */
2399   if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
2400     {
2401       asection *srel;
2402 
2403       srel = bfd_get_section_by_name (dynobj, ".rela.bss");
2404       BFD_ASSERT (srel != NULL);
2405       srel->size += sizeof (Elf32_External_Rela);
2406       h->needs_copy = 1;
2407     }
2408 
2409   /* Historic precedent: m68k and i386 allow max 8-byte alignment for the
2410      thing to copy; so do we.  */
2411 
2412   /* We need to figure out the alignment required for this symbol.  I
2413      have no idea how ELF linkers handle this.  */
2414   power_of_two = bfd_log2 (h->size);
2415   if (power_of_two > 3)
2416     power_of_two = 3;
2417 
2418   /* Apply the required alignment.  */
2419   s->size = BFD_ALIGN (s->size, (bfd_size_type) (1 << power_of_two));
2420   if (power_of_two > bfd_get_section_alignment (dynobj, s))
2421     {
2422       if (!bfd_set_section_alignment (dynobj, s, power_of_two))
2423 	return FALSE;
2424     }
2425 
2426   /* Define the symbol as being at this point in the section.  */
2427   h->root.u.def.section = s;
2428   h->root.u.def.value = s->size;
2429 
2430   /* Increment the section size to make room for the symbol.  */
2431   s->size += h->size;
2432 
2433   return TRUE;
2434 }
2435 
2436 /* Look through the relocs for a section during the first phase.  */
2437 
2438 static bfd_boolean
cris_elf_check_relocs(abfd,info,sec,relocs)2439 cris_elf_check_relocs (abfd, info, sec, relocs)
2440      bfd *abfd;
2441      struct bfd_link_info *info;
2442      asection *sec;
2443      const Elf_Internal_Rela *relocs;
2444 {
2445   bfd *dynobj;
2446   Elf_Internal_Shdr *symtab_hdr;
2447   struct elf_link_hash_entry **sym_hashes, **sym_hashes_end;
2448   bfd_signed_vma *local_got_refcounts;
2449   const Elf_Internal_Rela *rel;
2450   const Elf_Internal_Rela *rel_end;
2451   asection *sgot;
2452   asection *srelgot;
2453   asection *sreloc;
2454 
2455   if (info->relocatable)
2456     return TRUE;
2457 
2458   dynobj = elf_hash_table (info)->dynobj;
2459   symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
2460   sym_hashes = elf_sym_hashes (abfd);
2461   sym_hashes_end = sym_hashes + symtab_hdr->sh_size/sizeof (Elf32_External_Sym);
2462   local_got_refcounts = elf_local_got_refcounts (abfd);
2463 
2464   sgot = NULL;
2465   srelgot = NULL;
2466   sreloc = NULL;
2467 
2468   if (!elf_bad_symtab (abfd))
2469     sym_hashes_end -= symtab_hdr->sh_info;
2470 
2471   rel_end = relocs + sec->reloc_count;
2472   for (rel = relocs; rel < rel_end; rel++)
2473     {
2474       struct elf_link_hash_entry *h;
2475       unsigned long r_symndx;
2476       enum elf_cris_reloc_type r_type;
2477 
2478       r_symndx = ELF32_R_SYM (rel->r_info);
2479       if (r_symndx < symtab_hdr->sh_info)
2480         h = NULL;
2481       else
2482 	{
2483 	  h = sym_hashes[r_symndx - symtab_hdr->sh_info];
2484 	  while (h->root.type == bfd_link_hash_indirect
2485 		 || h->root.type == bfd_link_hash_warning)
2486 	    h = (struct elf_link_hash_entry *) h->root.u.i.link;
2487 	}
2488 
2489       r_type = ELF32_R_TYPE (rel->r_info);
2490 
2491       /* Some relocs require linker-created sections; we need to hang them
2492 	 on the first input bfd we found that contained dynamic relocs.  */
2493       switch (r_type)
2494 	{
2495 	case R_CRIS_16_GOT:
2496 	case R_CRIS_32_GOT:
2497 	case R_CRIS_32_GOTREL:
2498 	case R_CRIS_32_PLT_GOTREL:
2499 	case R_CRIS_32_PLT_PCREL:
2500 	case R_CRIS_16_GOTPLT:
2501 	case R_CRIS_32_GOTPLT:
2502 	  if (dynobj == NULL)
2503 	    {
2504 	      elf_hash_table (info)->dynobj = dynobj = abfd;
2505 
2506 	      /* We could handle this if we can get a handle on the
2507 		 output bfd in elf_cris_adjust_dynamic_symbol.  Failing
2508 		 that, we must insist on dynobj being a specific mach.  */
2509 	      if (bfd_get_mach (dynobj) == bfd_mach_cris_v10_v32)
2510 		{
2511 		  (*_bfd_error_handler)
2512 		    (_("%B, section %A:\n  v10/v32 compatible object %s"
2513 		       " must not contain a PIC relocation"),
2514 		     abfd, sec);
2515 		  return FALSE;
2516 		}
2517 
2518 	      /* Create the .got section, so we can assume it's always
2519 		 present whenever there's a dynobj.  */
2520 	      if (!_bfd_elf_create_got_section (dynobj, info))
2521 		return FALSE;
2522 	    }
2523 	  break;
2524 
2525 	default:
2526 	  break;
2527 	}
2528 
2529       /* Some relocs require a global offset table (but perhaps not a
2530 	 specific GOT entry).  */
2531       switch (r_type)
2532 	{
2533 	  /* For R_CRIS_16_GOTPLT and R_CRIS_32_GOTPLT, we need a GOT
2534 	     entry only for local symbols.  Unfortunately, we don't know
2535 	     until later on if there's a version script that forces the
2536 	     symbol local.  We must have the .rela.got section in place
2537 	     before we know if the symbol looks global now, so we need
2538 	     to treat the reloc just like for R_CRIS_16_GOT and
2539 	     R_CRIS_32_GOT.  */
2540 	case R_CRIS_16_GOTPLT:
2541 	case R_CRIS_32_GOTPLT:
2542 	case R_CRIS_16_GOT:
2543 	case R_CRIS_32_GOT:
2544 	  if (srelgot == NULL
2545 	      && (h != NULL || info->shared))
2546 	    {
2547 	      srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
2548 	      if (srelgot == NULL)
2549 		{
2550 		  srelgot = bfd_make_section_with_flags (dynobj,
2551 							 ".rela.got",
2552 							 (SEC_ALLOC
2553 							  | SEC_LOAD
2554 							  | SEC_HAS_CONTENTS
2555 							  | SEC_IN_MEMORY
2556 							  | SEC_LINKER_CREATED
2557 							  | SEC_READONLY));
2558 		  if (srelgot == NULL
2559 		      || !bfd_set_section_alignment (dynobj, srelgot, 2))
2560 		    return FALSE;
2561 		}
2562 	    }
2563 	  /* Fall through.  */
2564 
2565 	case R_CRIS_32_GOTREL:
2566 	case R_CRIS_32_PLT_GOTREL:
2567 	  if (sgot == NULL)
2568 	    sgot = bfd_get_section_by_name (dynobj, ".got");
2569 
2570 	  if (local_got_refcounts == NULL)
2571 	    {
2572 	      bfd_size_type amt;
2573 
2574 	      /* We use index local_got_refcounts[-1] to count all
2575 		 GOT-relative relocations that do not have explicit
2576 		 GOT entries.  */
2577 	      amt = symtab_hdr->sh_info + 1;
2578 	      amt *= sizeof (bfd_signed_vma);
2579 	      local_got_refcounts = ((bfd_signed_vma *) bfd_zalloc (abfd, amt));
2580 	      if (local_got_refcounts == NULL)
2581 		return FALSE;
2582 
2583 	      local_got_refcounts++;
2584 	      elf_local_got_refcounts (abfd) = local_got_refcounts;
2585 	    }
2586 	  break;
2587 
2588 	default:
2589 	  break;
2590 	}
2591 
2592       switch (r_type)
2593         {
2594 	case R_CRIS_16_GOTPLT:
2595 	case R_CRIS_32_GOTPLT:
2596 	  /* Mark that we need a GOT entry if the PLT entry (and its GOT
2597 	     entry) is eliminated.  We can only do this for a non-local
2598 	     symbol.  */
2599 	  if (h != NULL)
2600 	    {
2601 	      ((struct elf_cris_link_hash_entry *) h)->gotplt_refcount++;
2602 	      goto handle_gotplt_reloc;
2603 	    }
2604 	  /* If h is NULL then this is a local symbol, and we must make a
2605 	     GOT entry for it, so handle it like a GOT reloc.  */
2606 	  /* Fall through.  */
2607 
2608 	case R_CRIS_16_GOT:
2609 	case R_CRIS_32_GOT:
2610 	  /* This symbol requires a global offset table entry.  */
2611 	  if (h != NULL)
2612 	    {
2613 	      if (h->got.refcount == 0)
2614 		{
2615 		  /* Make sure this symbol is output as a dynamic symbol.  */
2616 		  if (h->dynindx == -1)
2617 		    {
2618 		      if (!bfd_elf_link_record_dynamic_symbol (info, h))
2619 			return FALSE;
2620 		    }
2621 
2622 		  /* Allocate space in the .got section.  */
2623 		  sgot->size += 4;
2624 		  /* Allocate relocation space.  */
2625 		  srelgot->size += sizeof (Elf32_External_Rela);
2626 		}
2627 	      h->got.refcount++;
2628 	    }
2629 	  else
2630 	    {
2631 	      /* This is a global offset table entry for a local symbol.  */
2632 	      if (local_got_refcounts[r_symndx] == 0)
2633 		{
2634 		  sgot->size += 4;
2635 		  if (info->shared)
2636 		    {
2637 		      /* If we are generating a shared object, we need to
2638 			 output a R_CRIS_RELATIVE reloc so that the dynamic
2639 			 linker can adjust this GOT entry.  */
2640 		      srelgot->size += sizeof (Elf32_External_Rela);
2641 		    }
2642 		}
2643 	      local_got_refcounts[r_symndx]++;
2644 	    }
2645 	  break;
2646 
2647 	case R_CRIS_32_GOTREL:
2648 	  /* This reference requires a global offset table.
2649 	     FIXME: The actual refcount isn't used currently; the .got
2650 	     section can't be removed if there were any references in the
2651 	     input.  */
2652 	  local_got_refcounts[-1]++;
2653 	  break;
2654 
2655 	handle_gotplt_reloc:
2656 
2657 	case R_CRIS_32_PLT_GOTREL:
2658 	  /* This reference requires a global offset table.  */
2659 	  local_got_refcounts[-1]++;
2660 	  /* Fall through.  */
2661 
2662 	case R_CRIS_32_PLT_PCREL:
2663 	  /* This symbol requires a procedure linkage table entry.  We
2664 	     actually build the entry in adjust_dynamic_symbol,
2665              because this might be a case of linking PIC code which is
2666              never referenced by a dynamic object, in which case we
2667              don't need to generate a procedure linkage table entry
2668              after all.  */
2669 
2670 	  /* Beware: if we'd check for visibility of the symbol here
2671 	     (and not marking the need for a PLT when non-visible), we'd
2672 	     get into trouble with keeping handling consistent with
2673 	     regards to relocs found before definition and GOTPLT
2674 	     handling.  Eliminable PLT entries will be dealt with later
2675 	     anyway.  */
2676 	  if (h == NULL)
2677 	    continue;
2678 
2679 	  h->needs_plt = 1;
2680 	  h->plt.refcount++;
2681 	  break;
2682 
2683 	case R_CRIS_8:
2684 	case R_CRIS_16:
2685 	case R_CRIS_32:
2686 	  /* Let's help debug shared library creation.  Any of these
2687 	     relocs can be used in shared libs, but pages containing them
2688 	     cannot be shared.  Don't warn for sections we don't care
2689 	     about, such as debug sections or non-constant sections.  We
2690 	     can't help tables of (global) function pointers, for example,
2691 	     though they must be emitted in a data section to avoid having
2692 	     impure text sections.  */
2693 	  if (info->shared
2694 	      && (sec->flags & SEC_ALLOC) != 0
2695 	      && (sec->flags & SEC_READONLY) != 0)
2696 	    {
2697 	      /* FIXME: How do we make this optionally a warning only?  */
2698 	      (*_bfd_error_handler)
2699 		(_("%B, section %A:\n  relocation %s should not"
2700 		   " be used in a shared object; recompile with -fPIC"),
2701 		 abfd,
2702 		 sec,
2703 		 cris_elf_howto_table[r_type].name);
2704 	    }
2705 	  /* Fall through.  */
2706 
2707 	case R_CRIS_8_PCREL:
2708 	case R_CRIS_16_PCREL:
2709 	case R_CRIS_32_PCREL:
2710 	  if (h != NULL)
2711 	    {
2712 	      h->non_got_ref = 1;
2713 
2714 	      /* Make sure a plt entry is created for this symbol if it
2715 		 turns out to be a function defined by a dynamic object.  */
2716 	      if (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT)
2717 		h->plt.refcount++;
2718 	    }
2719 
2720 	  /* If we are creating a shared library and this is not a local
2721 	     symbol, we need to copy the reloc into the shared library.
2722 	     However when linking with -Bsymbolic and this is a global
2723 	     symbol which is defined in an object we are including in the
2724 	     link (i.e., DEF_REGULAR is set), then we can resolve the
2725 	     reloc directly.  At this point we have not seen all the input
2726 	     files, so it is possible that DEF_REGULAR is not set now but
2727 	     will be set later (it is never cleared).  In case of a weak
2728 	     definition, DEF_REGULAR may be cleared later by a strong
2729 	     definition in a shared library.  We account for that
2730 	     possibility below by storing information in the relocs_copied
2731 	     field of the hash table entry.  A similar situation occurs
2732 	     when creating shared libraries and symbol visibility changes
2733 	     render the symbol local.  */
2734 
2735 	  /* No need to do anything if we're not creating a shared object.  */
2736 	  if (! info->shared)
2737 	    break;
2738 
2739 	  /* We don't need to handle relocs into sections not going into
2740 	     the "real" output.  */
2741 	  if ((sec->flags & SEC_ALLOC) == 0)
2742 	    break;
2743 
2744 	  /* We can only eliminate PC-relative relocs.  */
2745 	  if (r_type == R_CRIS_8_PCREL
2746 	      || r_type == R_CRIS_16_PCREL
2747 	      || r_type == R_CRIS_32_PCREL)
2748 	    {
2749 	      /* If the symbol is local, then we can eliminate the reloc.  */
2750 	      if (h == NULL || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
2751 		break;
2752 
2753 	      /* If this is with -Bsymbolic and the symbol isn't weak, and
2754 		 is defined by an ordinary object (the ones we include in
2755 		 this shared library) then we can also eliminate the
2756 		 reloc.  See comment above for more eliminable cases which
2757 		 we can't identify at this time.  */
2758 	      if (info->symbolic
2759 		  && h->root.type != bfd_link_hash_defweak
2760 		  && h->def_regular)
2761 		break;
2762 
2763 	      if ((sec->flags & SEC_READONLY) != 0)
2764 		{
2765 		  /* FIXME: How do we make this optionally a warning only?  */
2766 		  (*_bfd_error_handler)
2767 		    (_("%B, section %A:\n  relocation %s should not be used"
2768 		       " in a shared object; recompile with -fPIC"),
2769 		     abfd,
2770 		     sec,
2771 		     cris_elf_howto_table[r_type].name);
2772 		}
2773 	    }
2774 
2775 	  /* We create a reloc section in dynobj and make room for this
2776 	     reloc.  */
2777 	  if (sreloc == NULL)
2778 	    {
2779 	      const char *name;
2780 
2781 	      name = (bfd_elf_string_from_elf_section
2782 		      (abfd,
2783 		       elf_elfheader (abfd)->e_shstrndx,
2784 		       elf_section_data (sec)->rel_hdr.sh_name));
2785 	      if (name == NULL)
2786 		return FALSE;
2787 
2788 	      BFD_ASSERT (strncmp (name, ".rela", 5) == 0
2789 			  && strcmp (bfd_get_section_name (abfd, sec),
2790 				     name + 5) == 0);
2791 
2792 	      sreloc = bfd_get_section_by_name (dynobj, name);
2793 	      if (sreloc == NULL)
2794 		{
2795 		  sreloc = bfd_make_section_with_flags (dynobj, name,
2796 							(SEC_ALLOC
2797 							 | SEC_LOAD
2798 							 | SEC_HAS_CONTENTS
2799 							 | SEC_IN_MEMORY
2800 							 | SEC_LINKER_CREATED
2801 							 | SEC_READONLY));
2802 		  if (sreloc == NULL
2803 		      || !bfd_set_section_alignment (dynobj, sreloc, 2))
2804 		    return FALSE;
2805 		}
2806 	      if (sec->flags & SEC_READONLY)
2807 		info->flags |= DF_TEXTREL;
2808 	    }
2809 
2810 	  sreloc->size += sizeof (Elf32_External_Rela);
2811 
2812 	  /* If we are linking with -Bsymbolic, we count the number of PC
2813 	     relative relocations we have entered for this symbol, so that
2814 	     we can discard them again if the symbol is later defined by a
2815 	     regular object.  We know that h is really a pointer to an
2816 	     elf_cris_link_hash_entry.  */
2817 	  if ((r_type == R_CRIS_8_PCREL
2818 	       || r_type == R_CRIS_16_PCREL
2819 	       || r_type == R_CRIS_32_PCREL)
2820 	      && info->symbolic)
2821 	    {
2822 	      struct elf_cris_link_hash_entry *eh;
2823 	      struct elf_cris_pcrel_relocs_copied *p;
2824 
2825 	      eh = (struct elf_cris_link_hash_entry *) h;
2826 
2827 	      for (p = eh->pcrel_relocs_copied; p != NULL; p = p->next)
2828 		if (p->section == sreloc)
2829 		  break;
2830 
2831 	      if (p == NULL)
2832 		{
2833 		  p = ((struct elf_cris_pcrel_relocs_copied *)
2834 		       bfd_alloc (dynobj, (bfd_size_type) sizeof *p));
2835 		  if (p == NULL)
2836 		    return FALSE;
2837 		  p->next = eh->pcrel_relocs_copied;
2838 		  eh->pcrel_relocs_copied = p;
2839 		  p->section = sreloc;
2840 		  p->count = 0;
2841 		}
2842 
2843 	      ++p->count;
2844 	    }
2845 	  break;
2846 
2847         /* This relocation describes the C++ object vtable hierarchy.
2848            Reconstruct it for later use during GC.  */
2849         case R_CRIS_GNU_VTINHERIT:
2850           if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
2851             return FALSE;
2852           break;
2853 
2854         /* This relocation describes which C++ vtable entries are actually
2855            used.  Record for later use during GC.  */
2856         case R_CRIS_GNU_VTENTRY:
2857           if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
2858             return FALSE;
2859           break;
2860 
2861 	default:
2862 	  /* Other relocs do not appear here.  */
2863 	  bfd_set_error (bfd_error_bad_value);
2864 	  return FALSE;
2865         }
2866     }
2867 
2868   return TRUE;
2869 }
2870 
2871 /* Set the sizes of the dynamic sections.  */
2872 
2873 static bfd_boolean
elf_cris_size_dynamic_sections(output_bfd,info)2874 elf_cris_size_dynamic_sections (output_bfd, info)
2875      bfd *output_bfd ATTRIBUTE_UNUSED;
2876      struct bfd_link_info *info;
2877 {
2878   bfd *dynobj;
2879   asection *s;
2880   bfd_boolean plt;
2881   bfd_boolean relocs;
2882 
2883   dynobj = elf_hash_table (info)->dynobj;
2884   BFD_ASSERT (dynobj != NULL);
2885 
2886   if (elf_hash_table (info)->dynamic_sections_created)
2887     {
2888       /* Set the contents of the .interp section to the interpreter.  */
2889       if (info->executable)
2890 	{
2891 	  s = bfd_get_section_by_name (dynobj, ".interp");
2892 	  BFD_ASSERT (s != NULL);
2893 	  s->size = sizeof ELF_DYNAMIC_INTERPRETER;
2894 	  s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
2895 	}
2896     }
2897   else
2898     {
2899       /* Adjust all expected GOTPLT uses to use a GOT entry instead.  */
2900       elf_cris_link_hash_traverse (elf_cris_hash_table (info),
2901 				   elf_cris_adjust_gotplt_to_got,
2902 				   (PTR) info);
2903 
2904       /* We may have created entries in the .rela.got section.
2905 	 However, if we are not creating the dynamic sections, we will
2906 	 not actually use these entries.  Reset the size of .rela.got,
2907 	 which will cause it to get stripped from the output file
2908 	 below.  */
2909       s = bfd_get_section_by_name (dynobj, ".rela.got");
2910       if (s != NULL)
2911 	s->size = 0;
2912     }
2913 
2914   /* If this is a -Bsymbolic shared link, then we need to discard all PC
2915      relative relocs against symbols defined in a regular object.  We
2916      allocated space for them in the check_relocs routine, but we will not
2917      fill them in in the relocate_section routine.  We also discard space
2918      for relocs that have become for local symbols due to symbol
2919      visibility changes.  For programs, we discard space for relocs for
2920      symbols not referenced by any dynamic object.  */
2921   if (info->shared)
2922     elf_cris_link_hash_traverse (elf_cris_hash_table (info),
2923 				 elf_cris_discard_excess_dso_dynamics,
2924 				 (PTR) info);
2925   else
2926     elf_cris_link_hash_traverse (elf_cris_hash_table (info),
2927 				 elf_cris_discard_excess_program_dynamics,
2928 				 (PTR) info);
2929 
2930   /* The check_relocs and adjust_dynamic_symbol entry points have
2931      determined the sizes of the various dynamic sections.  Allocate
2932      memory for them.  */
2933   plt = FALSE;
2934   relocs = FALSE;
2935   for (s = dynobj->sections; s != NULL; s = s->next)
2936     {
2937       const char *name;
2938       bfd_boolean strip;
2939 
2940       if ((s->flags & SEC_LINKER_CREATED) == 0)
2941 	continue;
2942 
2943       /* It's OK to base decisions on the section name, because none
2944 	 of the dynobj section names depend upon the input files.  */
2945       name = bfd_get_section_name (dynobj, s);
2946 
2947       strip = FALSE;
2948 
2949       if (strcmp (name, ".plt") == 0)
2950 	{
2951 	  if (s->size == 0)
2952 	    {
2953 	      /* Strip this section if we don't need it; see the
2954                  comment below.  */
2955 	      strip = TRUE;
2956 	    }
2957 	  else
2958 	    {
2959 	      /* Remember whether there is a PLT.  */
2960 	      plt = TRUE;
2961 	    }
2962 	}
2963       else if (strncmp (name, ".rela", 5) == 0)
2964 	{
2965 	  if (s->size == 0)
2966 	    {
2967 	      /* If we don't need this section, strip it from the
2968 		 output file.  This is mostly to handle .rela.bss and
2969 		 .rela.plt.  We must create both sections in
2970 		 create_dynamic_sections, because they must be created
2971 		 before the linker maps input sections to output
2972 		 sections.  The linker does that before
2973 		 adjust_dynamic_symbol is called, and it is that
2974 		 function which decides whether anything needs to go
2975 		 into these sections.  */
2976 	      strip = TRUE;
2977 	    }
2978 	  else
2979 	    {
2980 	      /* Remember whether there are any reloc sections other
2981                  than .rela.plt.  */
2982 	      if (strcmp (name, ".rela.plt") != 0)
2983 		  relocs = TRUE;
2984 
2985 	      /* We use the reloc_count field as a counter if we need
2986 		 to copy relocs into the output file.  */
2987 	      s->reloc_count = 0;
2988 	    }
2989 	}
2990       else if (strncmp (name, ".got", 4) != 0)
2991 	{
2992 	  /* It's not one of our sections, so don't allocate space.  */
2993 	  continue;
2994 	}
2995 
2996       if (strip)
2997 	{
2998 	  s->flags |= SEC_EXCLUDE;
2999 	  continue;
3000 	}
3001 
3002       /* Allocate memory for the section contents. We use bfd_zalloc here
3003 	 in case unused entries are not reclaimed before the section's
3004 	 contents are written out.  This should not happen, but this way
3005 	 if it does, we will not write out garbage.  For reloc sections,
3006 	 this will make entries have the type R_CRIS_NONE.  */
3007       s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
3008       if (s->contents == NULL && s->size != 0)
3009 	return FALSE;
3010     }
3011 
3012   if (elf_hash_table (info)->dynamic_sections_created)
3013     {
3014       /* Add some entries to the .dynamic section.  We fill in the
3015 	 values later, in elf_cris_finish_dynamic_sections, but we
3016 	 must add the entries now so that we get the correct size for
3017 	 the .dynamic section.  The DT_DEBUG entry is filled in by the
3018 	 dynamic linker and used by the debugger.  */
3019 #define add_dynamic_entry(TAG, VAL) \
3020   _bfd_elf_add_dynamic_entry (info, TAG, VAL)
3021 
3022       if (!info->shared)
3023 	{
3024 	  if (!add_dynamic_entry (DT_DEBUG, 0))
3025 	    return FALSE;
3026 	}
3027 
3028       if (plt)
3029 	{
3030 	  if (!add_dynamic_entry (DT_PLTGOT, 0)
3031 	      || !add_dynamic_entry (DT_PLTRELSZ, 0)
3032 	      || !add_dynamic_entry (DT_PLTREL, DT_RELA)
3033 	      || !add_dynamic_entry (DT_JMPREL, 0))
3034 	    return FALSE;
3035 	}
3036 
3037       if (relocs)
3038 	{
3039 	  if (!add_dynamic_entry (DT_RELA, 0)
3040 	      || !add_dynamic_entry (DT_RELASZ, 0)
3041 	      || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
3042 	    return FALSE;
3043 	}
3044 
3045       if ((info->flags & DF_TEXTREL) != 0)
3046 	{
3047 	  if (!add_dynamic_entry (DT_TEXTREL, 0))
3048 	    return FALSE;
3049 	  info->flags |= DF_TEXTREL;
3050 	}
3051     }
3052 #undef add_dynamic_entry
3053 
3054   return TRUE;
3055 }
3056 
3057 /* This function is called via elf_cris_link_hash_traverse if we are
3058    creating a shared object.  In the -Bsymbolic case, it discards the
3059    space allocated to copy PC relative relocs against symbols which
3060    are defined in regular objects.  For the normal non-symbolic case,
3061    we also discard space for relocs that have become local due to
3062    symbol visibility changes.  We allocated space for them in the
3063    check_relocs routine, but we won't fill them in in the
3064    relocate_section routine.  */
3065 
3066 static bfd_boolean
elf_cris_discard_excess_dso_dynamics(h,inf)3067 elf_cris_discard_excess_dso_dynamics (h, inf)
3068      struct elf_cris_link_hash_entry *h;
3069      PTR inf;
3070 {
3071   struct elf_cris_pcrel_relocs_copied *s;
3072   struct bfd_link_info *info = (struct bfd_link_info *) inf;
3073 
3074   if (h->root.root.type == bfd_link_hash_warning)
3075     h = (struct elf_cris_link_hash_entry *) h->root.root.u.i.link;
3076 
3077   /* If a symbol has been forced local or we have found a regular
3078      definition for the symbolic link case, then we won't be needing
3079      any relocs.  */
3080   if (h->root.def_regular
3081       && (h->root.forced_local
3082 	  || info->symbolic))
3083     {
3084       for (s = h->pcrel_relocs_copied; s != NULL; s = s->next)
3085 	s->section->size -= s->count * sizeof (Elf32_External_Rela);
3086     }
3087 
3088   return TRUE;
3089 }
3090 
3091 /* This function is called via elf_cris_link_hash_traverse if we are *not*
3092    creating a shared object.  We discard space for relocs for symbols put
3093    in the .got, but which we found we do not have to resolve at run-time.  */
3094 
3095 static bfd_boolean
elf_cris_discard_excess_program_dynamics(h,inf)3096 elf_cris_discard_excess_program_dynamics (h, inf)
3097      struct elf_cris_link_hash_entry *h;
3098      PTR inf;
3099 {
3100   struct bfd_link_info *info = (struct bfd_link_info *) inf;
3101 
3102   if (h->root.root.type == bfd_link_hash_warning)
3103     h = (struct elf_cris_link_hash_entry *) h->root.root.u.i.link;
3104 
3105   /* If we're not creating a shared library and have a symbol which is
3106      referred to by .got references, but the symbol is defined locally,
3107      (or rather, not defined by a DSO) then lose the reloc for the .got
3108      (don't allocate room for it).  Likewise for relocs for something
3109      for which we create a PLT.  */
3110   if (!h->root.def_dynamic
3111       || h->root.plt.refcount > 0)
3112     {
3113       if (h->root.got.refcount > 0
3114 	  /* The size of this section is only valid and in sync with the
3115 	     various reference counts if we do dynamic; don't decrement it
3116 	     otherwise.  */
3117 	  && elf_hash_table (info)->dynamic_sections_created)
3118 	{
3119 	  bfd *dynobj = elf_hash_table (info)->dynobj;
3120 	  asection *srelgot;
3121 
3122 	  BFD_ASSERT (dynobj != NULL);
3123 
3124 	  srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
3125 
3126 	  BFD_ASSERT (srelgot != NULL);
3127 
3128 	  srelgot->size -= sizeof (Elf32_External_Rela);
3129 	}
3130 
3131       /* If the locally-defined symbol isn't used by a DSO, then we don't
3132 	 have to export it as a dynamic symbol.  This was already done for
3133 	 functions; doing this for all symbols would presumably not
3134 	 introduce new problems.  Of course we don't do this if we're
3135 	 exporting all dynamic symbols.  */
3136       if (! info->export_dynamic
3137 	  && h->root.dynindx != -1
3138 	  && !h->root.def_dynamic
3139 	  && !h->root.ref_dynamic)
3140 	{
3141 	  h->root.dynindx = -1;
3142 	  _bfd_elf_strtab_delref (elf_hash_table (info)->dynstr,
3143 				  h->root.dynstr_index);
3144 	}
3145     }
3146 
3147   return TRUE;
3148 }
3149 
3150 /* Reject a file depending on presence and expectation of prefixed
3151    underscores on symbols.  */
3152 
3153 static bfd_boolean
cris_elf_object_p(abfd)3154 cris_elf_object_p (abfd)
3155      bfd *abfd;
3156 {
3157   if (! cris_elf_set_mach_from_flags (abfd, elf_elfheader (abfd)->e_flags))
3158     return FALSE;
3159 
3160   if ((elf_elfheader (abfd)->e_flags & EF_CRIS_UNDERSCORE))
3161     return (bfd_get_symbol_leading_char (abfd) == '_');
3162   else
3163     return (bfd_get_symbol_leading_char (abfd) == 0);
3164 }
3165 
3166 /* Mark presence or absence of leading underscore.  Set machine type
3167    flags from mach type.  */
3168 
3169 static void
cris_elf_final_write_processing(abfd,linker)3170 cris_elf_final_write_processing (abfd, linker)
3171      bfd *abfd;
3172      bfd_boolean linker ATTRIBUTE_UNUSED;
3173 {
3174   unsigned long e_flags = elf_elfheader (abfd)->e_flags;
3175 
3176   e_flags &= ~EF_CRIS_UNDERSCORE;
3177   if (bfd_get_symbol_leading_char (abfd) == '_')
3178     e_flags |= EF_CRIS_UNDERSCORE;
3179 
3180   switch (bfd_get_mach (abfd))
3181     {
3182     case bfd_mach_cris_v0_v10:
3183       e_flags |= EF_CRIS_VARIANT_ANY_V0_V10;
3184       break;
3185 
3186     case bfd_mach_cris_v10_v32:
3187       e_flags |= EF_CRIS_VARIANT_COMMON_V10_V32;
3188       break;
3189 
3190     case bfd_mach_cris_v32:
3191       e_flags |= EF_CRIS_VARIANT_V32;
3192       break;
3193 
3194     default:
3195       _bfd_abort (__FILE__, __LINE__,
3196 		  _("Unexpected machine number"));
3197     }
3198 
3199   elf_elfheader (abfd)->e_flags = e_flags;
3200 }
3201 
3202 /* Set the mach type from e_flags value.  */
3203 
3204 static bfd_boolean
cris_elf_set_mach_from_flags(abfd,flags)3205 cris_elf_set_mach_from_flags (abfd, flags)
3206      bfd *abfd;
3207      unsigned long flags;
3208 {
3209   switch (flags & EF_CRIS_VARIANT_MASK)
3210     {
3211     case EF_CRIS_VARIANT_ANY_V0_V10:
3212       bfd_default_set_arch_mach (abfd, bfd_arch_cris, bfd_mach_cris_v0_v10);
3213       break;
3214 
3215     case EF_CRIS_VARIANT_V32:
3216       bfd_default_set_arch_mach (abfd, bfd_arch_cris, bfd_mach_cris_v32);
3217       break;
3218 
3219     case EF_CRIS_VARIANT_COMMON_V10_V32:
3220       bfd_default_set_arch_mach (abfd, bfd_arch_cris, bfd_mach_cris_v10_v32);
3221       break;
3222 
3223     default:
3224       /* Since we don't recognize them, we obviously can't support them
3225 	 with this code; we'd have to require that all future handling
3226 	 would be optional.  */
3227       bfd_set_error (bfd_error_wrong_format);
3228       return FALSE;
3229     }
3230 
3231   return TRUE;
3232 }
3233 
3234 /* Display the flags field.  */
3235 
3236 static bfd_boolean
cris_elf_print_private_bfd_data(abfd,ptr)3237 cris_elf_print_private_bfd_data (abfd, ptr)
3238      bfd *abfd;
3239      PTR ptr;
3240 {
3241   FILE *file = (FILE *) ptr;
3242 
3243   BFD_ASSERT (abfd != NULL && ptr != NULL);
3244 
3245   _bfd_elf_print_private_bfd_data (abfd, ptr);
3246 
3247   fprintf (file, _("private flags = %lx:"), elf_elfheader (abfd)->e_flags);
3248 
3249   if (elf_elfheader (abfd)->e_flags & EF_CRIS_UNDERSCORE)
3250     fprintf (file, _(" [symbols have a _ prefix]"));
3251   if ((elf_elfheader (abfd)->e_flags & EF_CRIS_VARIANT_MASK)
3252       == EF_CRIS_VARIANT_COMMON_V10_V32)
3253     fprintf (file, _(" [v10 and v32]"));
3254   if ((elf_elfheader (abfd)->e_flags & EF_CRIS_VARIANT_MASK)
3255       == EF_CRIS_VARIANT_V32)
3256     fprintf (file, _(" [v32]"));
3257 
3258   fputc ('\n', file);
3259   return TRUE;
3260 }
3261 
3262 /* Don't mix files with and without a leading underscore.  */
3263 
3264 static bfd_boolean
cris_elf_merge_private_bfd_data(ibfd,obfd)3265 cris_elf_merge_private_bfd_data (ibfd, obfd)
3266      bfd *ibfd;
3267      bfd *obfd;
3268 {
3269   int imach, omach;
3270 
3271   if (! _bfd_generic_verify_endian_match (ibfd, obfd))
3272     return FALSE;
3273 
3274   if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
3275       || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
3276     return TRUE;
3277 
3278   imach = bfd_get_mach (ibfd);
3279 
3280   if (! elf_flags_init (obfd))
3281     {
3282       /* This happens when ld starts out with a 'blank' output file.  */
3283       elf_flags_init (obfd) = TRUE;
3284 
3285       /* We ignore the linker-set mach, and instead set it according to
3286 	 the first input file.  This would also happen if we could
3287 	 somehow filter out the OUTPUT_ARCH () setting from elf.sc.
3288 	 This allows us to keep the same linker config across
3289 	 cris(v0..v10) and crisv32.  The drawback is that we can't force
3290 	 the output type, which might be a sane thing to do for a
3291 	 v10+v32 compatibility object.  */
3292       if (! bfd_set_arch_mach (obfd, bfd_arch_cris, imach))
3293 	return FALSE;
3294     }
3295 
3296   if (bfd_get_symbol_leading_char (ibfd)
3297       != bfd_get_symbol_leading_char (obfd))
3298     {
3299       (*_bfd_error_handler)
3300 	(bfd_get_symbol_leading_char (ibfd) == '_'
3301 	 ? _("%B: uses _-prefixed symbols, but writing file with non-prefixed symbols")
3302 	 : _("%B: uses non-prefixed symbols, but writing file with _-prefixed symbols"),
3303 	 ibfd);
3304       bfd_set_error (bfd_error_bad_value);
3305       return FALSE;
3306     }
3307 
3308   omach = bfd_get_mach (obfd);
3309 
3310   if (imach != omach)
3311     {
3312       /* We can get an incompatible combination only if either is
3313 	 bfd_mach_cris_v32, and the other one isn't compatible.  */
3314       if ((imach == bfd_mach_cris_v32
3315 	   && omach != bfd_mach_cris_v10_v32)
3316 	  || (omach == bfd_mach_cris_v32
3317 	      && imach != bfd_mach_cris_v10_v32))
3318 	{
3319 	  (*_bfd_error_handler)
3320 	    ((imach == bfd_mach_cris_v32)
3321 	     ? _("%B contains CRIS v32 code, incompatible"
3322 		 " with previous objects")
3323 	     : _("%B contains non-CRIS-v32 code, incompatible"
3324 		 " with previous objects"),
3325 	     ibfd);
3326 	  bfd_set_error (bfd_error_bad_value);
3327 	  return FALSE;
3328 	}
3329 
3330       /* We don't have to check the case where the input is compatible
3331 	 with v10 and v32, because the output is already known to be set
3332 	 to the other (compatible) mach.  */
3333       if (omach == bfd_mach_cris_v10_v32
3334 	  && ! bfd_set_arch_mach (obfd, bfd_arch_cris, imach))
3335 	return FALSE;
3336     }
3337 
3338   return TRUE;
3339 }
3340 
3341 /* Do side-effects of e_flags copying to obfd.  */
3342 
3343 static bfd_boolean
cris_elf_copy_private_bfd_data(ibfd,obfd)3344 cris_elf_copy_private_bfd_data (ibfd, obfd)
3345      bfd *ibfd;
3346      bfd *obfd;
3347 {
3348   /* Call the base function.  */
3349   if (!_bfd_elf_copy_private_bfd_data (ibfd, obfd))
3350     return FALSE;
3351 
3352   /* If output is big-endian for some obscure reason, stop here.  */
3353   if (_bfd_generic_verify_endian_match (ibfd, obfd) == FALSE)
3354     return FALSE;
3355 
3356   if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
3357       || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
3358     return TRUE;
3359 
3360   /* Do what we really came here for.  */
3361   return bfd_set_arch_mach (obfd, bfd_arch_cris, bfd_get_mach (ibfd));
3362 }
3363 
3364 static enum elf_reloc_type_class
elf_cris_reloc_type_class(rela)3365 elf_cris_reloc_type_class (rela)
3366      const Elf_Internal_Rela *rela;
3367 {
3368   switch ((int) ELF32_R_TYPE (rela->r_info))
3369     {
3370     case R_CRIS_RELATIVE:
3371       return reloc_class_relative;
3372     case R_CRIS_JUMP_SLOT:
3373       return reloc_class_plt;
3374     case R_CRIS_COPY:
3375       return reloc_class_copy;
3376     default:
3377       return reloc_class_normal;
3378     }
3379 }
3380 
3381 #define ELF_ARCH		bfd_arch_cris
3382 #define ELF_MACHINE_CODE	EM_CRIS
3383 #define ELF_MAXPAGESIZE		0x2000
3384 
3385 #define TARGET_LITTLE_SYM	bfd_elf32_cris_vec
3386 #define TARGET_LITTLE_NAME	"elf32-cris"
3387 #define elf_symbol_leading_char 0
3388 
3389 #define elf_info_to_howto_rel			NULL
3390 #define elf_info_to_howto			cris_info_to_howto_rela
3391 #define elf_backend_relocate_section		cris_elf_relocate_section
3392 #define elf_backend_gc_mark_hook		cris_elf_gc_mark_hook
3393 #define elf_backend_gc_sweep_hook		cris_elf_gc_sweep_hook
3394 #define elf_backend_check_relocs                cris_elf_check_relocs
3395 #define elf_backend_grok_prstatus		cris_elf_grok_prstatus
3396 #define elf_backend_grok_psinfo			cris_elf_grok_psinfo
3397 
3398 #define elf_backend_can_gc_sections		1
3399 #define elf_backend_can_refcount		1
3400 
3401 #define elf_backend_object_p			cris_elf_object_p
3402 #define elf_backend_final_write_processing \
3403 	cris_elf_final_write_processing
3404 #define bfd_elf32_bfd_print_private_bfd_data \
3405 	cris_elf_print_private_bfd_data
3406 #define bfd_elf32_bfd_merge_private_bfd_data \
3407 	cris_elf_merge_private_bfd_data
3408 #define bfd_elf32_bfd_copy_private_bfd_data \
3409 	cris_elf_copy_private_bfd_data
3410 
3411 #define bfd_elf32_bfd_reloc_type_lookup		cris_reloc_type_lookup
3412 
3413 #define bfd_elf32_bfd_link_hash_table_create \
3414 	elf_cris_link_hash_table_create
3415 #define elf_backend_adjust_dynamic_symbol \
3416 	elf_cris_adjust_dynamic_symbol
3417 #define elf_backend_size_dynamic_sections \
3418 	elf_cris_size_dynamic_sections
3419 #define elf_backend_finish_dynamic_symbol \
3420 	elf_cris_finish_dynamic_symbol
3421 #define elf_backend_finish_dynamic_sections \
3422 	elf_cris_finish_dynamic_sections
3423 #define elf_backend_create_dynamic_sections \
3424 	_bfd_elf_create_dynamic_sections
3425 #define bfd_elf32_bfd_final_link \
3426 	bfd_elf_gc_common_final_link
3427 #define elf_backend_hide_symbol			elf_cris_hide_symbol
3428 #define elf_backend_reloc_type_class		elf_cris_reloc_type_class
3429 
3430 #define elf_backend_want_got_plt	1
3431 #define elf_backend_plt_readonly	1
3432 #define elf_backend_want_plt_sym	0
3433 #define elf_backend_got_header_size	12
3434 
3435 /* Later, we my want to optimize RELA entries into REL entries for dynamic
3436    linking and libraries (if it's a win of any significance).  Until then,
3437    take the easy route.  */
3438 #define elf_backend_may_use_rel_p 0
3439 #define elf_backend_may_use_rela_p 1
3440 #define elf_backend_rela_normal		1
3441 
3442 #include "elf32-target.h"
3443 
3444 #define INCLUDED_TARGET_FILE
3445 
3446 #undef TARGET_LITTLE_SYM
3447 #undef TARGET_LITTLE_NAME
3448 #undef elf_symbol_leading_char
3449 
3450 #define TARGET_LITTLE_SYM bfd_elf32_us_cris_vec
3451 #define TARGET_LITTLE_NAME "elf32-us-cris"
3452 #define elf_symbol_leading_char '_'
3453 
3454 #include "elf32-target.h"
3455