Commit | Line | Data |
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252b5132 | 1 | /* 32-bit ELF support for ARM |
d1f161ea NC |
2 | Copyright 1998, 1999, 2000, 2001, 2002, 2003, 2004 |
3 | Free Software Foundation, Inc. | |
252b5132 RH |
4 | |
5 | This file is part of BFD, the Binary File Descriptor library. | |
6 | ||
7 | This program is free software; you can redistribute it and/or modify | |
8 | it under the terms of the GNU General Public License as published by | |
9 | the Free Software Foundation; either version 2 of the License, or | |
10 | (at your option) any later version. | |
11 | ||
12 | This program is distributed in the hope that it will be useful, | |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
18 | along with this program; if not, write to the Free Software | |
19 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ | |
20 | ||
acf8aed4 AM |
21 | #ifndef USE_REL |
22 | #define USE_REL 0 | |
23 | #endif | |
24 | ||
252b5132 RH |
25 | typedef unsigned long int insn32; |
26 | typedef unsigned short int insn16; | |
27 | ||
b34976b6 | 28 | static bfd_boolean elf32_arm_set_private_flags |
252b5132 | 29 | PARAMS ((bfd *, flagword)); |
b34976b6 | 30 | static bfd_boolean elf32_arm_copy_private_bfd_data |
252b5132 | 31 | PARAMS ((bfd *, bfd *)); |
b34976b6 | 32 | static bfd_boolean elf32_arm_merge_private_bfd_data |
252b5132 | 33 | PARAMS ((bfd *, bfd *)); |
b34976b6 | 34 | static bfd_boolean elf32_arm_print_private_bfd_data |
252b5132 | 35 | PARAMS ((bfd *, PTR)); |
f21f3fe0 | 36 | static int elf32_arm_get_symbol_type |
252b5132 RH |
37 | PARAMS (( Elf_Internal_Sym *, int)); |
38 | static struct bfd_link_hash_table *elf32_arm_link_hash_table_create | |
39 | PARAMS ((bfd *)); | |
40 | static bfd_reloc_status_type elf32_arm_final_link_relocate | |
780a67af NC |
41 | PARAMS ((reloc_howto_type *, bfd *, bfd *, asection *, bfd_byte *, |
42 | Elf_Internal_Rela *, bfd_vma, struct bfd_link_info *, asection *, | |
dc810e39 | 43 | const char *, int, struct elf_link_hash_entry *)); |
252b5132 RH |
44 | static insn32 insert_thumb_branch |
45 | PARAMS ((insn32, int)); | |
46 | static struct elf_link_hash_entry *find_thumb_glue | |
917583ad | 47 | PARAMS ((struct bfd_link_info *, const char *, bfd *)); |
252b5132 | 48 | static struct elf_link_hash_entry *find_arm_glue |
917583ad | 49 | PARAMS ((struct bfd_link_info *, const char *, bfd *)); |
ba96a88f NC |
50 | static void elf32_arm_post_process_headers |
51 | PARAMS ((bfd *, struct bfd_link_info *)); | |
bcbdc74c NC |
52 | static int elf32_arm_to_thumb_stub |
53 | PARAMS ((struct bfd_link_info *, const char *, bfd *, bfd *, asection *, | |
54 | bfd_byte *, asection *, bfd_vma, bfd_signed_vma, bfd_vma)); | |
55 | static int elf32_thumb_to_arm_stub | |
56 | PARAMS ((struct bfd_link_info *, const char *, bfd *, bfd *, asection *, | |
57 | bfd_byte *, asection *, bfd_vma, bfd_signed_vma, bfd_vma)); | |
b34976b6 | 58 | static bfd_boolean elf32_arm_relocate_section |
917583ad NC |
59 | PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *, |
60 | Elf_Internal_Rela *, Elf_Internal_Sym *, asection **)); | |
61 | static asection * elf32_arm_gc_mark_hook | |
1e2f5b6e | 62 | PARAMS ((asection *, struct bfd_link_info *, Elf_Internal_Rela *, |
917583ad | 63 | struct elf_link_hash_entry *, Elf_Internal_Sym *)); |
b34976b6 | 64 | static bfd_boolean elf32_arm_gc_sweep_hook |
917583ad NC |
65 | PARAMS ((bfd *, struct bfd_link_info *, asection *, |
66 | const Elf_Internal_Rela *)); | |
b34976b6 | 67 | static bfd_boolean elf32_arm_check_relocs |
917583ad NC |
68 | PARAMS ((bfd *, struct bfd_link_info *, asection *, |
69 | const Elf_Internal_Rela *)); | |
b34976b6 | 70 | static bfd_boolean elf32_arm_find_nearest_line |
917583ad NC |
71 | PARAMS ((bfd *, asection *, asymbol **, bfd_vma, const char **, |
72 | const char **, unsigned int *)); | |
b34976b6 | 73 | static bfd_boolean elf32_arm_adjust_dynamic_symbol |
917583ad | 74 | PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *)); |
b34976b6 | 75 | static bfd_boolean elf32_arm_size_dynamic_sections |
917583ad | 76 | PARAMS ((bfd *, struct bfd_link_info *)); |
b34976b6 | 77 | static bfd_boolean elf32_arm_finish_dynamic_symbol |
917583ad NC |
78 | PARAMS ((bfd *, struct bfd_link_info *, struct elf_link_hash_entry *, |
79 | Elf_Internal_Sym *)); | |
b34976b6 | 80 | static bfd_boolean elf32_arm_finish_dynamic_sections |
917583ad NC |
81 | PARAMS ((bfd *, struct bfd_link_info *)); |
82 | static struct bfd_hash_entry * elf32_arm_link_hash_newfunc | |
83 | PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *)); | |
acf8aed4 | 84 | #if USE_REL |
917583ad NC |
85 | static void arm_add_to_rel |
86 | PARAMS ((bfd *, bfd_byte *, reloc_howto_type *, bfd_signed_vma)); | |
87 | #endif | |
5e681ec4 PB |
88 | static bfd_boolean allocate_dynrelocs |
89 | PARAMS ((struct elf_link_hash_entry *h, PTR inf)); | |
90 | static bfd_boolean create_got_section | |
91 | PARAMS ((bfd * dynobj, struct bfd_link_info * info)); | |
92 | static bfd_boolean elf32_arm_create_dynamic_sections | |
93 | PARAMS ((bfd * dynobj, struct bfd_link_info * info)); | |
7e392df6 NC |
94 | static enum elf_reloc_type_class elf32_arm_reloc_type_class |
95 | PARAMS ((const Elf_Internal_Rela *)); | |
c178919b NC |
96 | static bfd_boolean elf32_arm_object_p |
97 | PARAMS ((bfd *)); | |
252b5132 | 98 | |
7e392df6 NC |
99 | #ifndef ELFARM_NABI_C_INCLUDED |
100 | static void record_arm_to_thumb_glue | |
101 | PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *)); | |
102 | static void record_thumb_to_arm_glue | |
103 | PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *)); | |
b34976b6 | 104 | bfd_boolean bfd_elf32_arm_allocate_interworking_sections |
917583ad | 105 | PARAMS ((struct bfd_link_info *)); |
b34976b6 | 106 | bfd_boolean bfd_elf32_arm_get_bfd_for_interworking |
917583ad | 107 | PARAMS ((bfd *, struct bfd_link_info *)); |
b34976b6 | 108 | bfd_boolean bfd_elf32_arm_process_before_allocation |
e489d0ae | 109 | PARAMS ((bfd *, struct bfd_link_info *, int, int)); |
7e392df6 NC |
110 | #endif |
111 | ||
99e4ae17 | 112 | |
fd2ec330 | 113 | #define INTERWORK_FLAG(abfd) (elf_elfheader (abfd)->e_flags & EF_ARM_INTERWORK) |
9b485d32 | 114 | |
252b5132 RH |
115 | /* The linker script knows the section names for placement. |
116 | The entry_names are used to do simple name mangling on the stubs. | |
117 | Given a function name, and its type, the stub can be found. The | |
9b485d32 | 118 | name can be changed. The only requirement is the %s be present. */ |
252b5132 RH |
119 | #define THUMB2ARM_GLUE_SECTION_NAME ".glue_7t" |
120 | #define THUMB2ARM_GLUE_ENTRY_NAME "__%s_from_thumb" | |
121 | ||
122 | #define ARM2THUMB_GLUE_SECTION_NAME ".glue_7" | |
123 | #define ARM2THUMB_GLUE_ENTRY_NAME "__%s_from_arm" | |
124 | ||
125 | /* The name of the dynamic interpreter. This is put in the .interp | |
126 | section. */ | |
127 | #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1" | |
128 | ||
5e681ec4 PB |
129 | #ifdef FOUR_WORD_PLT |
130 | ||
131 | /* The size in bytes of the special first entry in the procedure | |
132 | linkage table. */ | |
133 | #define PLT_HEADER_SIZE 16 | |
134 | ||
252b5132 | 135 | /* The size in bytes of an entry in the procedure linkage table. */ |
24a1ba0f | 136 | #define PLT_ENTRY_SIZE 16 |
252b5132 RH |
137 | |
138 | /* The first entry in a procedure linkage table looks like | |
139 | this. It is set up so that any shared library function that is | |
59f2c4e7 | 140 | called before the relocation has been set up calls the dynamic |
9b485d32 | 141 | linker first. */ |
5e681ec4 PB |
142 | static const bfd_vma elf32_arm_plt0_entry [PLT_HEADER_SIZE / 4] = |
143 | { | |
144 | 0xe52de004, /* str lr, [sp, #-4]! */ | |
145 | 0xe59fe010, /* ldr lr, [pc, #16] */ | |
146 | 0xe08fe00e, /* add lr, pc, lr */ | |
147 | 0xe5bef008, /* ldr pc, [lr, #8]! */ | |
148 | }; | |
149 | ||
150 | /* Subsequent entries in a procedure linkage table look like | |
151 | this. */ | |
152 | static const bfd_vma elf32_arm_plt_entry [PLT_ENTRY_SIZE / 4] = | |
153 | { | |
154 | 0xe28fc600, /* add ip, pc, #NN */ | |
155 | 0xe28cca00, /* add ip, ip, #NN */ | |
156 | 0xe5bcf000, /* ldr pc, [ip, #NN]! */ | |
157 | 0x00000000, /* unused */ | |
158 | }; | |
159 | ||
160 | #else | |
161 | ||
162 | /* The size in bytes of the special first entry in the procedure | |
163 | linkage table. */ | |
164 | #define PLT_HEADER_SIZE 20 | |
165 | ||
166 | /* The size in bytes of an entry in the procedure linkage table. */ | |
167 | #define PLT_ENTRY_SIZE 12 | |
168 | ||
169 | /* The first entry in a procedure linkage table looks like | |
170 | this. It is set up so that any shared library function that is | |
171 | called before the relocation has been set up calls the dynamic | |
172 | linker first. */ | |
173 | static const bfd_vma elf32_arm_plt0_entry [PLT_HEADER_SIZE / 4] = | |
917583ad | 174 | { |
5e681ec4 PB |
175 | 0xe52de004, /* str lr, [sp, #-4]! */ |
176 | 0xe59fe004, /* ldr lr, [pc, #4] */ | |
177 | 0xe08fe00e, /* add lr, pc, lr */ | |
178 | 0xe5bef008, /* ldr pc, [lr, #8]! */ | |
179 | 0x00000000, /* &GOT[0] - . */ | |
917583ad | 180 | }; |
252b5132 RH |
181 | |
182 | /* Subsequent entries in a procedure linkage table look like | |
183 | this. */ | |
24a1ba0f | 184 | static const bfd_vma elf32_arm_plt_entry [PLT_ENTRY_SIZE / 4] = |
5e681ec4 PB |
185 | { |
186 | 0xe28fc600, /* add ip, pc, #0xNN00000 */ | |
187 | 0xe28cca00, /* add ip, ip, #0xNN000 */ | |
188 | 0xe5bcf000, /* ldr pc, [ip, #0xNNN]! */ | |
189 | }; | |
190 | ||
191 | #endif | |
252b5132 | 192 | |
e489d0ae PB |
193 | /* Used to build a map of a section. This is required for mixed-endian |
194 | code/data. */ | |
195 | ||
196 | typedef struct elf32_elf_section_map | |
197 | { | |
198 | bfd_vma vma; | |
199 | char type; | |
200 | } | |
201 | elf32_arm_section_map; | |
202 | ||
203 | struct _arm_elf_section_data | |
204 | { | |
205 | struct bfd_elf_section_data elf; | |
206 | int mapcount; | |
207 | elf32_arm_section_map *map; | |
208 | }; | |
209 | ||
210 | #define elf32_arm_section_data(sec) \ | |
211 | ((struct _arm_elf_section_data *) elf_section_data (sec)) | |
212 | ||
252b5132 RH |
213 | /* The ARM linker needs to keep track of the number of relocs that it |
214 | decides to copy in check_relocs for each symbol. This is so that | |
215 | it can discard PC relative relocs if it doesn't need them when | |
216 | linking with -Bsymbolic. We store the information in a field | |
217 | extending the regular ELF linker hash table. */ | |
218 | ||
219 | /* This structure keeps track of the number of PC relative relocs we | |
220 | have copied for a given symbol. */ | |
5e681ec4 | 221 | struct elf32_arm_relocs_copied |
917583ad NC |
222 | { |
223 | /* Next section. */ | |
5e681ec4 | 224 | struct elf32_arm_relocs_copied * next; |
917583ad NC |
225 | /* A section in dynobj. */ |
226 | asection * section; | |
227 | /* Number of relocs copied in this section. */ | |
228 | bfd_size_type count; | |
229 | }; | |
252b5132 | 230 | |
ba96a88f | 231 | /* Arm ELF linker hash entry. */ |
252b5132 | 232 | struct elf32_arm_link_hash_entry |
917583ad NC |
233 | { |
234 | struct elf_link_hash_entry root; | |
252b5132 | 235 | |
917583ad | 236 | /* Number of PC relative relocs copied for this symbol. */ |
5e681ec4 | 237 | struct elf32_arm_relocs_copied * relocs_copied; |
917583ad | 238 | }; |
252b5132 | 239 | |
252b5132 | 240 | /* Traverse an arm ELF linker hash table. */ |
252b5132 RH |
241 | #define elf32_arm_link_hash_traverse(table, func, info) \ |
242 | (elf_link_hash_traverse \ | |
243 | (&(table)->root, \ | |
b34976b6 | 244 | (bfd_boolean (*) PARAMS ((struct elf_link_hash_entry *, PTR))) (func), \ |
252b5132 RH |
245 | (info))) |
246 | ||
247 | /* Get the ARM elf linker hash table from a link_info structure. */ | |
248 | #define elf32_arm_hash_table(info) \ | |
249 | ((struct elf32_arm_link_hash_table *) ((info)->hash)) | |
250 | ||
9b485d32 | 251 | /* ARM ELF linker hash table. */ |
252b5132 | 252 | struct elf32_arm_link_hash_table |
917583ad NC |
253 | { |
254 | /* The main hash table. */ | |
255 | struct elf_link_hash_table root; | |
252b5132 | 256 | |
4cc11e76 | 257 | /* The size in bytes of the section containing the Thumb-to-ARM glue. */ |
dc810e39 | 258 | bfd_size_type thumb_glue_size; |
252b5132 | 259 | |
4cc11e76 | 260 | /* The size in bytes of the section containing the ARM-to-Thumb glue. */ |
dc810e39 | 261 | bfd_size_type arm_glue_size; |
252b5132 | 262 | |
4cc11e76 | 263 | /* An arbitrary input BFD chosen to hold the glue sections. */ |
917583ad | 264 | bfd * bfd_of_glue_owner; |
ba96a88f | 265 | |
917583ad NC |
266 | /* A boolean indicating whether knowledge of the ARM's pipeline |
267 | length should be applied by the linker. */ | |
268 | int no_pipeline_knowledge; | |
5e681ec4 | 269 | |
e489d0ae PB |
270 | /* Nonzero to output a BE8 image. */ |
271 | int byteswap_code; | |
272 | ||
5e681ec4 PB |
273 | /* Short-cuts to get to dynamic linker sections. */ |
274 | asection *sgot; | |
275 | asection *sgotplt; | |
276 | asection *srelgot; | |
277 | asection *splt; | |
278 | asection *srelplt; | |
279 | asection *sdynbss; | |
280 | asection *srelbss; | |
281 | ||
282 | /* Small local sym to section mapping cache. */ | |
283 | struct sym_sec_cache sym_sec; | |
917583ad | 284 | }; |
252b5132 | 285 | |
780a67af NC |
286 | /* Create an entry in an ARM ELF linker hash table. */ |
287 | ||
288 | static struct bfd_hash_entry * | |
289 | elf32_arm_link_hash_newfunc (entry, table, string) | |
290 | struct bfd_hash_entry * entry; | |
291 | struct bfd_hash_table * table; | |
292 | const char * string; | |
293 | { | |
294 | struct elf32_arm_link_hash_entry * ret = | |
295 | (struct elf32_arm_link_hash_entry *) entry; | |
296 | ||
297 | /* Allocate the structure if it has not already been allocated by a | |
298 | subclass. */ | |
299 | if (ret == (struct elf32_arm_link_hash_entry *) NULL) | |
300 | ret = ((struct elf32_arm_link_hash_entry *) | |
301 | bfd_hash_allocate (table, | |
302 | sizeof (struct elf32_arm_link_hash_entry))); | |
303 | if (ret == (struct elf32_arm_link_hash_entry *) NULL) | |
304 | return (struct bfd_hash_entry *) ret; | |
305 | ||
306 | /* Call the allocation method of the superclass. */ | |
307 | ret = ((struct elf32_arm_link_hash_entry *) | |
308 | _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret, | |
309 | table, string)); | |
310 | if (ret != (struct elf32_arm_link_hash_entry *) NULL) | |
5e681ec4 | 311 | ret->relocs_copied = NULL; |
780a67af NC |
312 | |
313 | return (struct bfd_hash_entry *) ret; | |
314 | } | |
315 | ||
5e681ec4 PB |
316 | /* Create .got, .gotplt, and .rel.got sections in DYNOBJ, and set up |
317 | shortcuts to them in our hash table. */ | |
318 | ||
319 | static bfd_boolean | |
320 | create_got_section (dynobj, info) | |
321 | bfd *dynobj; | |
322 | struct bfd_link_info *info; | |
323 | { | |
324 | struct elf32_arm_link_hash_table *htab; | |
325 | ||
326 | if (! _bfd_elf_create_got_section (dynobj, info)) | |
327 | return FALSE; | |
328 | ||
329 | htab = elf32_arm_hash_table (info); | |
330 | htab->sgot = bfd_get_section_by_name (dynobj, ".got"); | |
331 | htab->sgotplt = bfd_get_section_by_name (dynobj, ".got.plt"); | |
332 | if (!htab->sgot || !htab->sgotplt) | |
333 | abort (); | |
334 | ||
335 | htab->srelgot = bfd_make_section (dynobj, ".rel.got"); | |
336 | if (htab->srelgot == NULL | |
337 | || ! bfd_set_section_flags (dynobj, htab->srelgot, | |
338 | (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | |
339 | | SEC_IN_MEMORY | SEC_LINKER_CREATED | |
340 | | SEC_READONLY)) | |
341 | || ! bfd_set_section_alignment (dynobj, htab->srelgot, 2)) | |
342 | return FALSE; | |
343 | return TRUE; | |
344 | } | |
345 | ||
346 | /* Create .plt, .rel.plt, .got, .got.plt, .rel.got, .dynbss, and | |
347 | .rel.bss sections in DYNOBJ, and set up shortcuts to them in our | |
348 | hash table. */ | |
349 | ||
350 | static bfd_boolean | |
351 | elf32_arm_create_dynamic_sections (dynobj, info) | |
352 | bfd *dynobj; | |
353 | struct bfd_link_info *info; | |
354 | { | |
355 | struct elf32_arm_link_hash_table *htab; | |
356 | ||
357 | htab = elf32_arm_hash_table (info); | |
358 | if (!htab->sgot && !create_got_section (dynobj, info)) | |
359 | return FALSE; | |
360 | ||
361 | if (!_bfd_elf_create_dynamic_sections (dynobj, info)) | |
362 | return FALSE; | |
363 | ||
364 | htab->splt = bfd_get_section_by_name (dynobj, ".plt"); | |
365 | htab->srelplt = bfd_get_section_by_name (dynobj, ".rel.plt"); | |
366 | htab->sdynbss = bfd_get_section_by_name (dynobj, ".dynbss"); | |
367 | if (!info->shared) | |
368 | htab->srelbss = bfd_get_section_by_name (dynobj, ".rel.bss"); | |
369 | ||
370 | if (!htab->splt || !htab->srelplt || !htab->sdynbss | |
371 | || (!info->shared && !htab->srelbss)) | |
372 | abort (); | |
373 | ||
374 | return TRUE; | |
375 | } | |
376 | ||
377 | /* Copy the extra info we tack onto an elf_link_hash_entry. */ | |
378 | ||
379 | static void | |
380 | elf32_arm_copy_indirect_symbol (const struct elf_backend_data *bed, | |
381 | struct elf_link_hash_entry *dir, | |
382 | struct elf_link_hash_entry *ind) | |
383 | { | |
384 | struct elf32_arm_link_hash_entry *edir, *eind; | |
385 | ||
386 | edir = (struct elf32_arm_link_hash_entry *) dir; | |
387 | eind = (struct elf32_arm_link_hash_entry *) ind; | |
388 | ||
389 | if (eind->relocs_copied != NULL) | |
390 | { | |
391 | if (edir->relocs_copied != NULL) | |
392 | { | |
393 | struct elf32_arm_relocs_copied **pp; | |
394 | struct elf32_arm_relocs_copied *p; | |
395 | ||
396 | if (ind->root.type == bfd_link_hash_indirect) | |
397 | abort (); | |
398 | ||
399 | /* Add reloc counts against the weak sym to the strong sym | |
400 | list. Merge any entries against the same section. */ | |
401 | for (pp = &eind->relocs_copied; (p = *pp) != NULL; ) | |
402 | { | |
403 | struct elf32_arm_relocs_copied *q; | |
404 | ||
405 | for (q = edir->relocs_copied; q != NULL; q = q->next) | |
406 | if (q->section == p->section) | |
407 | { | |
5e681ec4 PB |
408 | q->count += p->count; |
409 | *pp = p->next; | |
410 | break; | |
411 | } | |
412 | if (q == NULL) | |
413 | pp = &p->next; | |
414 | } | |
415 | *pp = edir->relocs_copied; | |
416 | } | |
417 | ||
418 | edir->relocs_copied = eind->relocs_copied; | |
419 | eind->relocs_copied = NULL; | |
420 | } | |
421 | ||
422 | _bfd_elf_link_hash_copy_indirect (bed, dir, ind); | |
423 | } | |
424 | ||
9b485d32 | 425 | /* Create an ARM elf linker hash table. */ |
252b5132 RH |
426 | |
427 | static struct bfd_link_hash_table * | |
428 | elf32_arm_link_hash_table_create (abfd) | |
429 | bfd *abfd; | |
430 | { | |
431 | struct elf32_arm_link_hash_table *ret; | |
dc810e39 | 432 | bfd_size_type amt = sizeof (struct elf32_arm_link_hash_table); |
252b5132 | 433 | |
e2d34d7d | 434 | ret = (struct elf32_arm_link_hash_table *) bfd_malloc (amt); |
252b5132 RH |
435 | if (ret == (struct elf32_arm_link_hash_table *) NULL) |
436 | return NULL; | |
437 | ||
438 | if (!_bfd_elf_link_hash_table_init (&ret->root, abfd, | |
780a67af | 439 | elf32_arm_link_hash_newfunc)) |
252b5132 | 440 | { |
e2d34d7d | 441 | free (ret); |
252b5132 RH |
442 | return NULL; |
443 | } | |
444 | ||
5e681ec4 PB |
445 | ret->sgot = NULL; |
446 | ret->sgotplt = NULL; | |
447 | ret->srelgot = NULL; | |
448 | ret->splt = NULL; | |
449 | ret->srelplt = NULL; | |
450 | ret->sdynbss = NULL; | |
451 | ret->srelbss = NULL; | |
252b5132 RH |
452 | ret->thumb_glue_size = 0; |
453 | ret->arm_glue_size = 0; | |
454 | ret->bfd_of_glue_owner = NULL; | |
ba96a88f | 455 | ret->no_pipeline_knowledge = 0; |
e489d0ae | 456 | ret->byteswap_code = 0; |
5e681ec4 | 457 | ret->sym_sec.abfd = NULL; |
252b5132 RH |
458 | |
459 | return &ret->root.root; | |
460 | } | |
461 | ||
9b485d32 NC |
462 | /* Locate the Thumb encoded calling stub for NAME. */ |
463 | ||
252b5132 RH |
464 | static struct elf_link_hash_entry * |
465 | find_thumb_glue (link_info, name, input_bfd) | |
466 | struct bfd_link_info *link_info; | |
917583ad | 467 | const char *name; |
252b5132 RH |
468 | bfd *input_bfd; |
469 | { | |
470 | char *tmp_name; | |
471 | struct elf_link_hash_entry *hash; | |
472 | struct elf32_arm_link_hash_table *hash_table; | |
473 | ||
474 | /* We need a pointer to the armelf specific hash table. */ | |
475 | hash_table = elf32_arm_hash_table (link_info); | |
476 | ||
dc810e39 AM |
477 | tmp_name = (char *) bfd_malloc ((bfd_size_type) strlen (name) |
478 | + strlen (THUMB2ARM_GLUE_ENTRY_NAME) + 1); | |
252b5132 RH |
479 | |
480 | BFD_ASSERT (tmp_name); | |
481 | ||
482 | sprintf (tmp_name, THUMB2ARM_GLUE_ENTRY_NAME, name); | |
483 | ||
484 | hash = elf_link_hash_lookup | |
b34976b6 | 485 | (&(hash_table)->root, tmp_name, FALSE, FALSE, TRUE); |
252b5132 RH |
486 | |
487 | if (hash == NULL) | |
488 | /* xgettext:c-format */ | |
8f615d07 AM |
489 | (*_bfd_error_handler) (_("%s: unable to find THUMB glue '%s' for `%s'"), |
490 | bfd_archive_filename (input_bfd), tmp_name, name); | |
252b5132 RH |
491 | |
492 | free (tmp_name); | |
493 | ||
494 | return hash; | |
495 | } | |
496 | ||
9b485d32 NC |
497 | /* Locate the ARM encoded calling stub for NAME. */ |
498 | ||
252b5132 RH |
499 | static struct elf_link_hash_entry * |
500 | find_arm_glue (link_info, name, input_bfd) | |
501 | struct bfd_link_info *link_info; | |
917583ad | 502 | const char *name; |
252b5132 RH |
503 | bfd *input_bfd; |
504 | { | |
505 | char *tmp_name; | |
506 | struct elf_link_hash_entry *myh; | |
507 | struct elf32_arm_link_hash_table *hash_table; | |
508 | ||
509 | /* We need a pointer to the elfarm specific hash table. */ | |
510 | hash_table = elf32_arm_hash_table (link_info); | |
511 | ||
dc810e39 AM |
512 | tmp_name = (char *) bfd_malloc ((bfd_size_type) strlen (name) |
513 | + strlen (ARM2THUMB_GLUE_ENTRY_NAME) + 1); | |
252b5132 RH |
514 | |
515 | BFD_ASSERT (tmp_name); | |
516 | ||
517 | sprintf (tmp_name, ARM2THUMB_GLUE_ENTRY_NAME, name); | |
518 | ||
519 | myh = elf_link_hash_lookup | |
b34976b6 | 520 | (&(hash_table)->root, tmp_name, FALSE, FALSE, TRUE); |
252b5132 RH |
521 | |
522 | if (myh == NULL) | |
523 | /* xgettext:c-format */ | |
8f615d07 AM |
524 | (*_bfd_error_handler) (_("%s: unable to find ARM glue '%s' for `%s'"), |
525 | bfd_archive_filename (input_bfd), tmp_name, name); | |
252b5132 RH |
526 | |
527 | free (tmp_name); | |
528 | ||
529 | return myh; | |
530 | } | |
531 | ||
9b485d32 | 532 | /* ARM->Thumb glue: |
252b5132 RH |
533 | |
534 | .arm | |
535 | __func_from_arm: | |
536 | ldr r12, __func_addr | |
537 | bx r12 | |
538 | __func_addr: | |
9b485d32 | 539 | .word func @ behave as if you saw a ARM_32 reloc. */ |
252b5132 RH |
540 | |
541 | #define ARM2THUMB_GLUE_SIZE 12 | |
542 | static const insn32 a2t1_ldr_insn = 0xe59fc000; | |
543 | static const insn32 a2t2_bx_r12_insn = 0xe12fff1c; | |
544 | static const insn32 a2t3_func_addr_insn = 0x00000001; | |
545 | ||
9b485d32 | 546 | /* Thumb->ARM: Thumb->(non-interworking aware) ARM |
252b5132 RH |
547 | |
548 | .thumb .thumb | |
549 | .align 2 .align 2 | |
550 | __func_from_thumb: __func_from_thumb: | |
551 | bx pc push {r6, lr} | |
552 | nop ldr r6, __func_addr | |
553 | .arm mov lr, pc | |
554 | __func_change_to_arm: bx r6 | |
555 | b func .arm | |
556 | __func_back_to_thumb: | |
557 | ldmia r13! {r6, lr} | |
558 | bx lr | |
559 | __func_addr: | |
9b485d32 | 560 | .word func */ |
252b5132 RH |
561 | |
562 | #define THUMB2ARM_GLUE_SIZE 8 | |
563 | static const insn16 t2a1_bx_pc_insn = 0x4778; | |
564 | static const insn16 t2a2_noop_insn = 0x46c0; | |
565 | static const insn32 t2a3_b_insn = 0xea000000; | |
566 | ||
7e392df6 | 567 | #ifndef ELFARM_NABI_C_INCLUDED |
b34976b6 | 568 | bfd_boolean |
252b5132 RH |
569 | bfd_elf32_arm_allocate_interworking_sections (info) |
570 | struct bfd_link_info * info; | |
571 | { | |
572 | asection * s; | |
573 | bfd_byte * foo; | |
574 | struct elf32_arm_link_hash_table * globals; | |
575 | ||
576 | globals = elf32_arm_hash_table (info); | |
577 | ||
578 | BFD_ASSERT (globals != NULL); | |
579 | ||
580 | if (globals->arm_glue_size != 0) | |
581 | { | |
582 | BFD_ASSERT (globals->bfd_of_glue_owner != NULL); | |
583 | ||
dc810e39 AM |
584 | s = bfd_get_section_by_name (globals->bfd_of_glue_owner, |
585 | ARM2THUMB_GLUE_SECTION_NAME); | |
252b5132 RH |
586 | |
587 | BFD_ASSERT (s != NULL); | |
588 | ||
dc810e39 AM |
589 | foo = (bfd_byte *) bfd_alloc (globals->bfd_of_glue_owner, |
590 | globals->arm_glue_size); | |
252b5132 | 591 | |
eea6121a | 592 | s->size = globals->arm_glue_size; |
252b5132 RH |
593 | s->contents = foo; |
594 | } | |
595 | ||
596 | if (globals->thumb_glue_size != 0) | |
597 | { | |
598 | BFD_ASSERT (globals->bfd_of_glue_owner != NULL); | |
599 | ||
600 | s = bfd_get_section_by_name | |
601 | (globals->bfd_of_glue_owner, THUMB2ARM_GLUE_SECTION_NAME); | |
602 | ||
603 | BFD_ASSERT (s != NULL); | |
604 | ||
dc810e39 AM |
605 | foo = (bfd_byte *) bfd_alloc (globals->bfd_of_glue_owner, |
606 | globals->thumb_glue_size); | |
252b5132 | 607 | |
eea6121a | 608 | s->size = globals->thumb_glue_size; |
252b5132 RH |
609 | s->contents = foo; |
610 | } | |
611 | ||
b34976b6 | 612 | return TRUE; |
252b5132 RH |
613 | } |
614 | ||
615 | static void | |
616 | record_arm_to_thumb_glue (link_info, h) | |
617 | struct bfd_link_info * link_info; | |
618 | struct elf_link_hash_entry * h; | |
619 | { | |
620 | const char * name = h->root.root.string; | |
63b0f745 | 621 | asection * s; |
252b5132 RH |
622 | char * tmp_name; |
623 | struct elf_link_hash_entry * myh; | |
14a793b2 | 624 | struct bfd_link_hash_entry * bh; |
252b5132 | 625 | struct elf32_arm_link_hash_table * globals; |
dc810e39 | 626 | bfd_vma val; |
252b5132 RH |
627 | |
628 | globals = elf32_arm_hash_table (link_info); | |
629 | ||
630 | BFD_ASSERT (globals != NULL); | |
631 | BFD_ASSERT (globals->bfd_of_glue_owner != NULL); | |
632 | ||
633 | s = bfd_get_section_by_name | |
634 | (globals->bfd_of_glue_owner, ARM2THUMB_GLUE_SECTION_NAME); | |
635 | ||
252b5132 RH |
636 | BFD_ASSERT (s != NULL); |
637 | ||
dc810e39 AM |
638 | tmp_name = (char *) bfd_malloc ((bfd_size_type) strlen (name) |
639 | + strlen (ARM2THUMB_GLUE_ENTRY_NAME) + 1); | |
252b5132 RH |
640 | |
641 | BFD_ASSERT (tmp_name); | |
642 | ||
643 | sprintf (tmp_name, ARM2THUMB_GLUE_ENTRY_NAME, name); | |
644 | ||
645 | myh = elf_link_hash_lookup | |
b34976b6 | 646 | (&(globals)->root, tmp_name, FALSE, FALSE, TRUE); |
252b5132 RH |
647 | |
648 | if (myh != NULL) | |
649 | { | |
9b485d32 | 650 | /* We've already seen this guy. */ |
252b5132 | 651 | free (tmp_name); |
9b485d32 | 652 | return; |
252b5132 RH |
653 | } |
654 | ||
655 | /* The only trick here is using hash_table->arm_glue_size as the value. Even | |
656 | though the section isn't allocated yet, this is where we will be putting | |
657 | it. */ | |
14a793b2 | 658 | bh = NULL; |
dc810e39 AM |
659 | val = globals->arm_glue_size + 1; |
660 | _bfd_generic_link_add_one_symbol (link_info, globals->bfd_of_glue_owner, | |
661 | tmp_name, BSF_GLOBAL, s, val, | |
b34976b6 | 662 | NULL, TRUE, FALSE, &bh); |
252b5132 RH |
663 | |
664 | free (tmp_name); | |
665 | ||
666 | globals->arm_glue_size += ARM2THUMB_GLUE_SIZE; | |
667 | ||
668 | return; | |
669 | } | |
670 | ||
671 | static void | |
672 | record_thumb_to_arm_glue (link_info, h) | |
673 | struct bfd_link_info *link_info; | |
674 | struct elf_link_hash_entry *h; | |
675 | { | |
676 | const char *name = h->root.root.string; | |
63b0f745 | 677 | asection *s; |
252b5132 RH |
678 | char *tmp_name; |
679 | struct elf_link_hash_entry *myh; | |
14a793b2 | 680 | struct bfd_link_hash_entry *bh; |
252b5132 RH |
681 | struct elf32_arm_link_hash_table *hash_table; |
682 | char bind; | |
dc810e39 | 683 | bfd_vma val; |
252b5132 RH |
684 | |
685 | hash_table = elf32_arm_hash_table (link_info); | |
686 | ||
687 | BFD_ASSERT (hash_table != NULL); | |
688 | BFD_ASSERT (hash_table->bfd_of_glue_owner != NULL); | |
689 | ||
690 | s = bfd_get_section_by_name | |
691 | (hash_table->bfd_of_glue_owner, THUMB2ARM_GLUE_SECTION_NAME); | |
692 | ||
693 | BFD_ASSERT (s != NULL); | |
694 | ||
dc810e39 AM |
695 | tmp_name = (char *) bfd_malloc ((bfd_size_type) strlen (name) |
696 | + strlen (THUMB2ARM_GLUE_ENTRY_NAME) + 1); | |
252b5132 RH |
697 | |
698 | BFD_ASSERT (tmp_name); | |
699 | ||
700 | sprintf (tmp_name, THUMB2ARM_GLUE_ENTRY_NAME, name); | |
701 | ||
702 | myh = elf_link_hash_lookup | |
b34976b6 | 703 | (&(hash_table)->root, tmp_name, FALSE, FALSE, TRUE); |
252b5132 RH |
704 | |
705 | if (myh != NULL) | |
706 | { | |
9b485d32 | 707 | /* We've already seen this guy. */ |
252b5132 | 708 | free (tmp_name); |
9b485d32 | 709 | return; |
252b5132 RH |
710 | } |
711 | ||
14a793b2 | 712 | bh = NULL; |
dc810e39 AM |
713 | val = hash_table->thumb_glue_size + 1; |
714 | _bfd_generic_link_add_one_symbol (link_info, hash_table->bfd_of_glue_owner, | |
715 | tmp_name, BSF_GLOBAL, s, val, | |
b34976b6 | 716 | NULL, TRUE, FALSE, &bh); |
252b5132 | 717 | |
9b485d32 | 718 | /* If we mark it 'Thumb', the disassembler will do a better job. */ |
14a793b2 | 719 | myh = (struct elf_link_hash_entry *) bh; |
252b5132 RH |
720 | bind = ELF_ST_BIND (myh->type); |
721 | myh->type = ELF_ST_INFO (bind, STT_ARM_TFUNC); | |
722 | ||
723 | free (tmp_name); | |
724 | ||
252b5132 RH |
725 | #define CHANGE_TO_ARM "__%s_change_to_arm" |
726 | #define BACK_FROM_ARM "__%s_back_from_arm" | |
727 | ||
9b485d32 | 728 | /* Allocate another symbol to mark where we switch to Arm mode. */ |
dc810e39 AM |
729 | tmp_name = (char *) bfd_malloc ((bfd_size_type) strlen (name) |
730 | + strlen (CHANGE_TO_ARM) + 1); | |
252b5132 RH |
731 | |
732 | BFD_ASSERT (tmp_name); | |
733 | ||
734 | sprintf (tmp_name, CHANGE_TO_ARM, name); | |
735 | ||
14a793b2 | 736 | bh = NULL; |
dc810e39 AM |
737 | val = hash_table->thumb_glue_size + 4, |
738 | _bfd_generic_link_add_one_symbol (link_info, hash_table->bfd_of_glue_owner, | |
739 | tmp_name, BSF_LOCAL, s, val, | |
b34976b6 | 740 | NULL, TRUE, FALSE, &bh); |
252b5132 RH |
741 | |
742 | free (tmp_name); | |
743 | ||
744 | hash_table->thumb_glue_size += THUMB2ARM_GLUE_SIZE; | |
745 | ||
746 | return; | |
747 | } | |
748 | ||
8afb0e02 NC |
749 | /* Add the glue sections to ABFD. This function is called from the |
750 | linker scripts in ld/emultempl/{armelf}.em. */ | |
9b485d32 | 751 | |
b34976b6 | 752 | bfd_boolean |
8afb0e02 | 753 | bfd_elf32_arm_add_glue_sections_to_bfd (abfd, info) |
252b5132 RH |
754 | bfd *abfd; |
755 | struct bfd_link_info *info; | |
756 | { | |
252b5132 RH |
757 | flagword flags; |
758 | asection *sec; | |
759 | ||
8afb0e02 NC |
760 | /* If we are only performing a partial |
761 | link do not bother adding the glue. */ | |
1049f94e | 762 | if (info->relocatable) |
b34976b6 | 763 | return TRUE; |
252b5132 | 764 | |
252b5132 RH |
765 | sec = bfd_get_section_by_name (abfd, ARM2THUMB_GLUE_SECTION_NAME); |
766 | ||
767 | if (sec == NULL) | |
768 | { | |
57db232e NC |
769 | /* Note: we do not include the flag SEC_LINKER_CREATED, as this |
770 | will prevent elf_link_input_bfd() from processing the contents | |
771 | of this section. */ | |
811b4bf6 | 772 | flags = SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_CODE | SEC_READONLY; |
252b5132 RH |
773 | |
774 | sec = bfd_make_section (abfd, ARM2THUMB_GLUE_SECTION_NAME); | |
775 | ||
776 | if (sec == NULL | |
777 | || !bfd_set_section_flags (abfd, sec, flags) | |
778 | || !bfd_set_section_alignment (abfd, sec, 2)) | |
b34976b6 | 779 | return FALSE; |
9a5aca8c | 780 | |
57db232e NC |
781 | /* Set the gc mark to prevent the section from being removed by garbage |
782 | collection, despite the fact that no relocs refer to this section. */ | |
783 | sec->gc_mark = 1; | |
252b5132 RH |
784 | } |
785 | ||
786 | sec = bfd_get_section_by_name (abfd, THUMB2ARM_GLUE_SECTION_NAME); | |
787 | ||
788 | if (sec == NULL) | |
789 | { | |
811b4bf6 | 790 | flags = SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_CODE | SEC_READONLY; |
252b5132 RH |
791 | |
792 | sec = bfd_make_section (abfd, THUMB2ARM_GLUE_SECTION_NAME); | |
793 | ||
794 | if (sec == NULL | |
795 | || !bfd_set_section_flags (abfd, sec, flags) | |
796 | || !bfd_set_section_alignment (abfd, sec, 2)) | |
b34976b6 | 797 | return FALSE; |
9a5aca8c | 798 | |
57db232e | 799 | sec->gc_mark = 1; |
252b5132 RH |
800 | } |
801 | ||
b34976b6 | 802 | return TRUE; |
8afb0e02 NC |
803 | } |
804 | ||
805 | /* Select a BFD to be used to hold the sections used by the glue code. | |
806 | This function is called from the linker scripts in ld/emultempl/ | |
807 | {armelf/pe}.em */ | |
808 | ||
b34976b6 | 809 | bfd_boolean |
8afb0e02 NC |
810 | bfd_elf32_arm_get_bfd_for_interworking (abfd, info) |
811 | bfd *abfd; | |
812 | struct bfd_link_info *info; | |
813 | { | |
814 | struct elf32_arm_link_hash_table *globals; | |
815 | ||
816 | /* If we are only performing a partial link | |
817 | do not bother getting a bfd to hold the glue. */ | |
1049f94e | 818 | if (info->relocatable) |
b34976b6 | 819 | return TRUE; |
8afb0e02 NC |
820 | |
821 | globals = elf32_arm_hash_table (info); | |
822 | ||
823 | BFD_ASSERT (globals != NULL); | |
824 | ||
825 | if (globals->bfd_of_glue_owner != NULL) | |
b34976b6 | 826 | return TRUE; |
8afb0e02 | 827 | |
252b5132 RH |
828 | /* Save the bfd for later use. */ |
829 | globals->bfd_of_glue_owner = abfd; | |
cedb70c5 | 830 | |
b34976b6 | 831 | return TRUE; |
252b5132 RH |
832 | } |
833 | ||
b34976b6 | 834 | bfd_boolean |
e489d0ae PB |
835 | bfd_elf32_arm_process_before_allocation (abfd, link_info, |
836 | no_pipeline_knowledge, | |
837 | byteswap_code) | |
252b5132 RH |
838 | bfd *abfd; |
839 | struct bfd_link_info *link_info; | |
ba96a88f | 840 | int no_pipeline_knowledge; |
e489d0ae | 841 | int byteswap_code; |
252b5132 RH |
842 | { |
843 | Elf_Internal_Shdr *symtab_hdr; | |
6cdc0ccc | 844 | Elf_Internal_Rela *internal_relocs = NULL; |
252b5132 RH |
845 | Elf_Internal_Rela *irel, *irelend; |
846 | bfd_byte *contents = NULL; | |
252b5132 RH |
847 | |
848 | asection *sec; | |
849 | struct elf32_arm_link_hash_table *globals; | |
850 | ||
851 | /* If we are only performing a partial link do not bother | |
852 | to construct any glue. */ | |
1049f94e | 853 | if (link_info->relocatable) |
b34976b6 | 854 | return TRUE; |
252b5132 RH |
855 | |
856 | /* Here we have a bfd that is to be included on the link. We have a hook | |
857 | to do reloc rummaging, before section sizes are nailed down. */ | |
252b5132 RH |
858 | globals = elf32_arm_hash_table (link_info); |
859 | ||
860 | BFD_ASSERT (globals != NULL); | |
861 | BFD_ASSERT (globals->bfd_of_glue_owner != NULL); | |
862 | ||
ba96a88f | 863 | globals->no_pipeline_knowledge = no_pipeline_knowledge; |
e489d0ae PB |
864 | if (byteswap_code && !bfd_big_endian (abfd)) |
865 | { | |
866 | _bfd_error_handler ( | |
867 | _("%s: BE8 images only valid in big-endian mode."), | |
868 | bfd_archive_filename (abfd)); | |
869 | return FALSE; | |
870 | } | |
871 | globals->byteswap_code = byteswap_code; | |
f21f3fe0 | 872 | |
252b5132 RH |
873 | /* Rummage around all the relocs and map the glue vectors. */ |
874 | sec = abfd->sections; | |
875 | ||
876 | if (sec == NULL) | |
b34976b6 | 877 | return TRUE; |
252b5132 RH |
878 | |
879 | for (; sec != NULL; sec = sec->next) | |
880 | { | |
881 | if (sec->reloc_count == 0) | |
882 | continue; | |
883 | ||
884 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
252b5132 | 885 | |
9b485d32 | 886 | /* Load the relocs. */ |
6cdc0ccc | 887 | internal_relocs |
45d6a902 AM |
888 | = _bfd_elf_link_read_relocs (abfd, sec, (PTR) NULL, |
889 | (Elf_Internal_Rela *) NULL, FALSE); | |
252b5132 | 890 | |
6cdc0ccc AM |
891 | if (internal_relocs == NULL) |
892 | goto error_return; | |
252b5132 | 893 | |
6cdc0ccc AM |
894 | irelend = internal_relocs + sec->reloc_count; |
895 | for (irel = internal_relocs; irel < irelend; irel++) | |
252b5132 RH |
896 | { |
897 | long r_type; | |
898 | unsigned long r_index; | |
252b5132 RH |
899 | |
900 | struct elf_link_hash_entry *h; | |
901 | ||
902 | r_type = ELF32_R_TYPE (irel->r_info); | |
903 | r_index = ELF32_R_SYM (irel->r_info); | |
904 | ||
9b485d32 | 905 | /* These are the only relocation types we care about. */ |
ba96a88f | 906 | if ( r_type != R_ARM_PC24 |
252b5132 RH |
907 | && r_type != R_ARM_THM_PC22) |
908 | continue; | |
909 | ||
910 | /* Get the section contents if we haven't done so already. */ | |
911 | if (contents == NULL) | |
912 | { | |
913 | /* Get cached copy if it exists. */ | |
914 | if (elf_section_data (sec)->this_hdr.contents != NULL) | |
915 | contents = elf_section_data (sec)->this_hdr.contents; | |
916 | else | |
917 | { | |
918 | /* Go get them off disk. */ | |
eea6121a | 919 | if (!bfd_malloc_and_get_section (abfd, sec, &contents)) |
252b5132 RH |
920 | goto error_return; |
921 | } | |
922 | } | |
923 | ||
a7c10850 | 924 | /* If the relocation is not against a symbol it cannot concern us. */ |
252b5132 RH |
925 | h = NULL; |
926 | ||
9b485d32 | 927 | /* We don't care about local symbols. */ |
252b5132 RH |
928 | if (r_index < symtab_hdr->sh_info) |
929 | continue; | |
930 | ||
9b485d32 | 931 | /* This is an external symbol. */ |
252b5132 RH |
932 | r_index -= symtab_hdr->sh_info; |
933 | h = (struct elf_link_hash_entry *) | |
934 | elf_sym_hashes (abfd)[r_index]; | |
935 | ||
936 | /* If the relocation is against a static symbol it must be within | |
937 | the current section and so cannot be a cross ARM/Thumb relocation. */ | |
938 | if (h == NULL) | |
939 | continue; | |
940 | ||
941 | switch (r_type) | |
942 | { | |
943 | case R_ARM_PC24: | |
944 | /* This one is a call from arm code. We need to look up | |
2f0ca46a | 945 | the target of the call. If it is a thumb target, we |
252b5132 | 946 | insert glue. */ |
252b5132 RH |
947 | if (ELF_ST_TYPE(h->type) == STT_ARM_TFUNC) |
948 | record_arm_to_thumb_glue (link_info, h); | |
949 | break; | |
950 | ||
951 | case R_ARM_THM_PC22: | |
f21f3fe0 | 952 | /* This one is a call from thumb code. We look |
2f0ca46a | 953 | up the target of the call. If it is not a thumb |
bcbdc74c | 954 | target, we insert glue. */ |
252b5132 RH |
955 | if (ELF_ST_TYPE (h->type) != STT_ARM_TFUNC) |
956 | record_thumb_to_arm_glue (link_info, h); | |
957 | break; | |
958 | ||
959 | default: | |
960 | break; | |
961 | } | |
962 | } | |
6cdc0ccc AM |
963 | |
964 | if (contents != NULL | |
965 | && elf_section_data (sec)->this_hdr.contents != contents) | |
966 | free (contents); | |
967 | contents = NULL; | |
968 | ||
969 | if (internal_relocs != NULL | |
970 | && elf_section_data (sec)->relocs != internal_relocs) | |
971 | free (internal_relocs); | |
972 | internal_relocs = NULL; | |
252b5132 RH |
973 | } |
974 | ||
b34976b6 | 975 | return TRUE; |
9a5aca8c | 976 | |
252b5132 | 977 | error_return: |
6cdc0ccc AM |
978 | if (contents != NULL |
979 | && elf_section_data (sec)->this_hdr.contents != contents) | |
980 | free (contents); | |
981 | if (internal_relocs != NULL | |
982 | && elf_section_data (sec)->relocs != internal_relocs) | |
983 | free (internal_relocs); | |
9a5aca8c | 984 | |
b34976b6 | 985 | return FALSE; |
252b5132 | 986 | } |
7e392df6 | 987 | #endif |
252b5132 RH |
988 | |
989 | /* The thumb form of a long branch is a bit finicky, because the offset | |
990 | encoding is split over two fields, each in it's own instruction. They | |
f21f3fe0 | 991 | can occur in any order. So given a thumb form of long branch, and an |
252b5132 | 992 | offset, insert the offset into the thumb branch and return finished |
f21f3fe0 | 993 | instruction. |
252b5132 | 994 | |
f21f3fe0 | 995 | It takes two thumb instructions to encode the target address. Each has |
4cc11e76 | 996 | 11 bits to invest. The upper 11 bits are stored in one (identified by |
f21f3fe0 UD |
997 | H-0.. see below), the lower 11 bits are stored in the other (identified |
998 | by H-1). | |
252b5132 | 999 | |
f21f3fe0 | 1000 | Combine together and shifted left by 1 (it's a half word address) and |
252b5132 RH |
1001 | there you have it. |
1002 | ||
1003 | Op: 1111 = F, | |
1004 | H-0, upper address-0 = 000 | |
1005 | Op: 1111 = F, | |
1006 | H-1, lower address-0 = 800 | |
1007 | ||
f21f3fe0 | 1008 | They can be ordered either way, but the arm tools I've seen always put |
252b5132 RH |
1009 | the lower one first. It probably doesn't matter. krk@cygnus.com |
1010 | ||
1011 | XXX: Actually the order does matter. The second instruction (H-1) | |
1012 | moves the computed address into the PC, so it must be the second one | |
1013 | in the sequence. The problem, however is that whilst little endian code | |
1014 | stores the instructions in HI then LOW order, big endian code does the | |
dfc5f959 | 1015 | reverse. nickc@cygnus.com. */ |
252b5132 | 1016 | |
dfc5f959 NC |
1017 | #define LOW_HI_ORDER 0xF800F000 |
1018 | #define HI_LOW_ORDER 0xF000F800 | |
252b5132 RH |
1019 | |
1020 | static insn32 | |
1021 | insert_thumb_branch (br_insn, rel_off) | |
1022 | insn32 br_insn; | |
1023 | int rel_off; | |
1024 | { | |
1025 | unsigned int low_bits; | |
1026 | unsigned int high_bits; | |
1027 | ||
252b5132 RH |
1028 | BFD_ASSERT ((rel_off & 1) != 1); |
1029 | ||
dfc5f959 NC |
1030 | rel_off >>= 1; /* Half word aligned address. */ |
1031 | low_bits = rel_off & 0x000007FF; /* The bottom 11 bits. */ | |
1032 | high_bits = (rel_off >> 11) & 0x000007FF; /* The top 11 bits. */ | |
252b5132 RH |
1033 | |
1034 | if ((br_insn & LOW_HI_ORDER) == LOW_HI_ORDER) | |
1035 | br_insn = LOW_HI_ORDER | (low_bits << 16) | high_bits; | |
1036 | else if ((br_insn & HI_LOW_ORDER) == HI_LOW_ORDER) | |
1037 | br_insn = HI_LOW_ORDER | (high_bits << 16) | low_bits; | |
1038 | else | |
9b485d32 NC |
1039 | /* FIXME: abort is probably not the right call. krk@cygnus.com */ |
1040 | abort (); /* error - not a valid branch instruction form. */ | |
252b5132 | 1041 | |
252b5132 RH |
1042 | return br_insn; |
1043 | } | |
1044 | ||
9b485d32 NC |
1045 | /* Thumb code calling an ARM function. */ |
1046 | ||
252b5132 RH |
1047 | static int |
1048 | elf32_thumb_to_arm_stub (info, name, input_bfd, output_bfd, input_section, | |
1049 | hit_data, sym_sec, offset, addend, val) | |
bcbdc74c NC |
1050 | struct bfd_link_info * info; |
1051 | const char * name; | |
1052 | bfd * input_bfd; | |
1053 | bfd * output_bfd; | |
1054 | asection * input_section; | |
1055 | bfd_byte * hit_data; | |
1056 | asection * sym_sec; | |
1057 | bfd_vma offset; | |
1058 | bfd_signed_vma addend; | |
1059 | bfd_vma val; | |
252b5132 | 1060 | { |
bcbdc74c | 1061 | asection * s = 0; |
dc810e39 | 1062 | bfd_vma my_offset; |
252b5132 RH |
1063 | unsigned long int tmp; |
1064 | long int ret_offset; | |
bcbdc74c NC |
1065 | struct elf_link_hash_entry * myh; |
1066 | struct elf32_arm_link_hash_table * globals; | |
252b5132 RH |
1067 | |
1068 | myh = find_thumb_glue (info, name, input_bfd); | |
1069 | if (myh == NULL) | |
b34976b6 | 1070 | return FALSE; |
252b5132 RH |
1071 | |
1072 | globals = elf32_arm_hash_table (info); | |
1073 | ||
1074 | BFD_ASSERT (globals != NULL); | |
1075 | BFD_ASSERT (globals->bfd_of_glue_owner != NULL); | |
1076 | ||
1077 | my_offset = myh->root.u.def.value; | |
1078 | ||
1079 | s = bfd_get_section_by_name (globals->bfd_of_glue_owner, | |
1080 | THUMB2ARM_GLUE_SECTION_NAME); | |
1081 | ||
1082 | BFD_ASSERT (s != NULL); | |
1083 | BFD_ASSERT (s->contents != NULL); | |
1084 | BFD_ASSERT (s->output_section != NULL); | |
1085 | ||
1086 | if ((my_offset & 0x01) == 0x01) | |
1087 | { | |
1088 | if (sym_sec != NULL | |
1089 | && sym_sec->owner != NULL | |
1090 | && !INTERWORK_FLAG (sym_sec->owner)) | |
1091 | { | |
8f615d07 | 1092 | (*_bfd_error_handler) |
9b485d32 | 1093 | (_("%s(%s): warning: interworking not enabled."), |
8f615d07 AM |
1094 | bfd_archive_filename (sym_sec->owner), name); |
1095 | (*_bfd_error_handler) | |
9b485d32 | 1096 | (_(" first occurrence: %s: thumb call to arm"), |
8f615d07 | 1097 | bfd_archive_filename (input_bfd)); |
252b5132 | 1098 | |
b34976b6 | 1099 | return FALSE; |
252b5132 RH |
1100 | } |
1101 | ||
1102 | --my_offset; | |
1103 | myh->root.u.def.value = my_offset; | |
1104 | ||
dc810e39 | 1105 | bfd_put_16 (output_bfd, (bfd_vma) t2a1_bx_pc_insn, |
252b5132 RH |
1106 | s->contents + my_offset); |
1107 | ||
dc810e39 | 1108 | bfd_put_16 (output_bfd, (bfd_vma) t2a2_noop_insn, |
252b5132 RH |
1109 | s->contents + my_offset + 2); |
1110 | ||
1111 | ret_offset = | |
9b485d32 NC |
1112 | /* Address of destination of the stub. */ |
1113 | ((bfd_signed_vma) val) | |
252b5132 | 1114 | - ((bfd_signed_vma) |
9b485d32 NC |
1115 | /* Offset from the start of the current section to the start of the stubs. */ |
1116 | (s->output_offset | |
1117 | /* Offset of the start of this stub from the start of the stubs. */ | |
1118 | + my_offset | |
1119 | /* Address of the start of the current section. */ | |
1120 | + s->output_section->vma) | |
1121 | /* The branch instruction is 4 bytes into the stub. */ | |
1122 | + 4 | |
1123 | /* ARM branches work from the pc of the instruction + 8. */ | |
1124 | + 8); | |
252b5132 RH |
1125 | |
1126 | bfd_put_32 (output_bfd, | |
dc810e39 | 1127 | (bfd_vma) t2a3_b_insn | ((ret_offset >> 2) & 0x00FFFFFF), |
252b5132 RH |
1128 | s->contents + my_offset + 4); |
1129 | } | |
1130 | ||
1131 | BFD_ASSERT (my_offset <= globals->thumb_glue_size); | |
1132 | ||
427bfd90 NC |
1133 | /* Now go back and fix up the original BL insn to point to here. */ |
1134 | ret_offset = | |
1135 | /* Address of where the stub is located. */ | |
1136 | (s->output_section->vma + s->output_offset + my_offset) | |
1137 | /* Address of where the BL is located. */ | |
1138 | - (input_section->output_section->vma + input_section->output_offset + offset) | |
1139 | /* Addend in the relocation. */ | |
1140 | - addend | |
1141 | /* Biassing for PC-relative addressing. */ | |
1142 | - 8; | |
252b5132 RH |
1143 | |
1144 | tmp = bfd_get_32 (input_bfd, hit_data | |
1145 | - input_section->vma); | |
1146 | ||
1147 | bfd_put_32 (output_bfd, | |
dc810e39 | 1148 | (bfd_vma) insert_thumb_branch (tmp, ret_offset), |
252b5132 RH |
1149 | hit_data - input_section->vma); |
1150 | ||
b34976b6 | 1151 | return TRUE; |
252b5132 RH |
1152 | } |
1153 | ||
9b485d32 NC |
1154 | /* Arm code calling a Thumb function. */ |
1155 | ||
252b5132 RH |
1156 | static int |
1157 | elf32_arm_to_thumb_stub (info, name, input_bfd, output_bfd, input_section, | |
1158 | hit_data, sym_sec, offset, addend, val) | |
bcbdc74c NC |
1159 | struct bfd_link_info * info; |
1160 | const char * name; | |
1161 | bfd * input_bfd; | |
1162 | bfd * output_bfd; | |
1163 | asection * input_section; | |
1164 | bfd_byte * hit_data; | |
1165 | asection * sym_sec; | |
1166 | bfd_vma offset; | |
1167 | bfd_signed_vma addend; | |
1168 | bfd_vma val; | |
252b5132 RH |
1169 | { |
1170 | unsigned long int tmp; | |
dc810e39 | 1171 | bfd_vma my_offset; |
bcbdc74c | 1172 | asection * s; |
252b5132 | 1173 | long int ret_offset; |
bcbdc74c NC |
1174 | struct elf_link_hash_entry * myh; |
1175 | struct elf32_arm_link_hash_table * globals; | |
252b5132 RH |
1176 | |
1177 | myh = find_arm_glue (info, name, input_bfd); | |
1178 | if (myh == NULL) | |
b34976b6 | 1179 | return FALSE; |
252b5132 RH |
1180 | |
1181 | globals = elf32_arm_hash_table (info); | |
1182 | ||
1183 | BFD_ASSERT (globals != NULL); | |
1184 | BFD_ASSERT (globals->bfd_of_glue_owner != NULL); | |
1185 | ||
1186 | my_offset = myh->root.u.def.value; | |
1187 | s = bfd_get_section_by_name (globals->bfd_of_glue_owner, | |
1188 | ARM2THUMB_GLUE_SECTION_NAME); | |
1189 | BFD_ASSERT (s != NULL); | |
1190 | BFD_ASSERT (s->contents != NULL); | |
1191 | BFD_ASSERT (s->output_section != NULL); | |
1192 | ||
1193 | if ((my_offset & 0x01) == 0x01) | |
1194 | { | |
1195 | if (sym_sec != NULL | |
1196 | && sym_sec->owner != NULL | |
1197 | && !INTERWORK_FLAG (sym_sec->owner)) | |
1198 | { | |
8f615d07 | 1199 | (*_bfd_error_handler) |
9b485d32 | 1200 | (_("%s(%s): warning: interworking not enabled."), |
8f615d07 AM |
1201 | bfd_archive_filename (sym_sec->owner), name); |
1202 | (*_bfd_error_handler) | |
9b485d32 | 1203 | (_(" first occurrence: %s: arm call to thumb"), |
8f615d07 | 1204 | bfd_archive_filename (input_bfd)); |
252b5132 | 1205 | } |
9b485d32 | 1206 | |
252b5132 RH |
1207 | --my_offset; |
1208 | myh->root.u.def.value = my_offset; | |
1209 | ||
dc810e39 | 1210 | bfd_put_32 (output_bfd, (bfd_vma) a2t1_ldr_insn, |
252b5132 RH |
1211 | s->contents + my_offset); |
1212 | ||
dc810e39 | 1213 | bfd_put_32 (output_bfd, (bfd_vma) a2t2_bx_r12_insn, |
252b5132 RH |
1214 | s->contents + my_offset + 4); |
1215 | ||
1216 | /* It's a thumb address. Add the low order bit. */ | |
1217 | bfd_put_32 (output_bfd, val | a2t3_func_addr_insn, | |
1218 | s->contents + my_offset + 8); | |
1219 | } | |
1220 | ||
1221 | BFD_ASSERT (my_offset <= globals->arm_glue_size); | |
1222 | ||
1223 | tmp = bfd_get_32 (input_bfd, hit_data); | |
1224 | tmp = tmp & 0xFF000000; | |
1225 | ||
9b485d32 | 1226 | /* Somehow these are both 4 too far, so subtract 8. */ |
dc810e39 AM |
1227 | ret_offset = (s->output_offset |
1228 | + my_offset | |
1229 | + s->output_section->vma | |
1230 | - (input_section->output_offset | |
1231 | + input_section->output_section->vma | |
1232 | + offset + addend) | |
1233 | - 8); | |
9a5aca8c | 1234 | |
252b5132 RH |
1235 | tmp = tmp | ((ret_offset >> 2) & 0x00FFFFFF); |
1236 | ||
dc810e39 | 1237 | bfd_put_32 (output_bfd, (bfd_vma) tmp, hit_data - input_section->vma); |
252b5132 | 1238 | |
b34976b6 | 1239 | return TRUE; |
252b5132 RH |
1240 | } |
1241 | ||
1242 | /* Perform a relocation as part of a final link. */ | |
9b485d32 | 1243 | |
252b5132 RH |
1244 | static bfd_reloc_status_type |
1245 | elf32_arm_final_link_relocate (howto, input_bfd, output_bfd, | |
1246 | input_section, contents, rel, value, | |
780a67af | 1247 | info, sym_sec, sym_name, sym_flags, h) |
252b5132 RH |
1248 | reloc_howto_type * howto; |
1249 | bfd * input_bfd; | |
1250 | bfd * output_bfd; | |
1251 | asection * input_section; | |
1252 | bfd_byte * contents; | |
1253 | Elf_Internal_Rela * rel; | |
1254 | bfd_vma value; | |
1255 | struct bfd_link_info * info; | |
1256 | asection * sym_sec; | |
1257 | const char * sym_name; | |
dc810e39 | 1258 | int sym_flags; |
780a67af | 1259 | struct elf_link_hash_entry * h; |
252b5132 RH |
1260 | { |
1261 | unsigned long r_type = howto->type; | |
1262 | unsigned long r_symndx; | |
1263 | bfd_byte * hit_data = contents + rel->r_offset; | |
1264 | bfd * dynobj = NULL; | |
1265 | Elf_Internal_Shdr * symtab_hdr; | |
1266 | struct elf_link_hash_entry ** sym_hashes; | |
1267 | bfd_vma * local_got_offsets; | |
1268 | asection * sgot = NULL; | |
1269 | asection * splt = NULL; | |
1270 | asection * sreloc = NULL; | |
252b5132 | 1271 | bfd_vma addend; |
ba96a88f NC |
1272 | bfd_signed_vma signed_addend; |
1273 | struct elf32_arm_link_hash_table * globals; | |
f21f3fe0 | 1274 | |
cac15327 NC |
1275 | /* If the start address has been set, then set the EF_ARM_HASENTRY |
1276 | flag. Setting this more than once is redundant, but the cost is | |
1277 | not too high, and it keeps the code simple. | |
99e4ae17 | 1278 | |
cac15327 NC |
1279 | The test is done here, rather than somewhere else, because the |
1280 | start address is only set just before the final link commences. | |
1281 | ||
1282 | Note - if the user deliberately sets a start address of 0, the | |
1283 | flag will not be set. */ | |
1284 | if (bfd_get_start_address (output_bfd) != 0) | |
1285 | elf_elfheader (output_bfd)->e_flags |= EF_ARM_HASENTRY; | |
99e4ae17 | 1286 | |
ba96a88f | 1287 | globals = elf32_arm_hash_table (info); |
f21f3fe0 | 1288 | |
252b5132 RH |
1289 | dynobj = elf_hash_table (info)->dynobj; |
1290 | if (dynobj) | |
1291 | { | |
1292 | sgot = bfd_get_section_by_name (dynobj, ".got"); | |
1293 | splt = bfd_get_section_by_name (dynobj, ".plt"); | |
1294 | } | |
1295 | symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr; | |
1296 | sym_hashes = elf_sym_hashes (input_bfd); | |
1297 | local_got_offsets = elf_local_got_offsets (input_bfd); | |
1298 | r_symndx = ELF32_R_SYM (rel->r_info); | |
1299 | ||
acf8aed4 | 1300 | #if USE_REL |
ba96a88f NC |
1301 | addend = bfd_get_32 (input_bfd, hit_data) & howto->src_mask; |
1302 | ||
1303 | if (addend & ((howto->src_mask + 1) >> 1)) | |
1304 | { | |
1305 | signed_addend = -1; | |
1306 | signed_addend &= ~ howto->src_mask; | |
1307 | signed_addend |= addend; | |
1308 | } | |
1309 | else | |
1310 | signed_addend = addend; | |
252b5132 | 1311 | #else |
ba96a88f | 1312 | addend = signed_addend = rel->r_addend; |
252b5132 | 1313 | #endif |
f21f3fe0 | 1314 | |
252b5132 RH |
1315 | switch (r_type) |
1316 | { | |
1317 | case R_ARM_NONE: | |
1318 | return bfd_reloc_ok; | |
1319 | ||
1320 | case R_ARM_PC24: | |
1321 | case R_ARM_ABS32: | |
1322 | case R_ARM_REL32: | |
dfc5f959 NC |
1323 | #ifndef OLD_ARM_ABI |
1324 | case R_ARM_XPC25: | |
1325 | #endif | |
7359ea65 | 1326 | case R_ARM_PLT32: |
5e681ec4 PB |
1327 | /* r_symndx will be zero only for relocs against symbols |
1328 | from removed linkonce sections, or sections discarded by | |
1329 | a linker script. */ | |
1330 | if (r_symndx == 0) | |
1331 | return bfd_reloc_ok; | |
1332 | ||
7359ea65 DJ |
1333 | /* Handle relocations which should use the PLT entry. ABS32/REL32 |
1334 | will use the symbol's value, which may point to a PLT entry, but we | |
1335 | don't need to handle that here. If we created a PLT entry, all | |
1336 | branches in this object should go to it. */ | |
1337 | if ((r_type != R_ARM_ABS32 && r_type != R_ARM_REL32) | |
1338 | && h != NULL | |
c84cd8ee | 1339 | && splt != NULL |
7359ea65 DJ |
1340 | && h->plt.offset != (bfd_vma) -1) |
1341 | { | |
c84cd8ee DJ |
1342 | /* If we've created a .plt section, and assigned a PLT entry to |
1343 | this function, it should not be known to bind locally. If | |
1344 | it were, we would have cleared the PLT entry. */ | |
7359ea65 DJ |
1345 | BFD_ASSERT (!SYMBOL_CALLS_LOCAL (info, h)); |
1346 | ||
1347 | value = (splt->output_section->vma | |
1348 | + splt->output_offset | |
1349 | + h->plt.offset); | |
1350 | return _bfd_final_link_relocate (howto, input_bfd, input_section, | |
1351 | contents, rel->r_offset, value, | |
1352 | (bfd_vma) 0); | |
1353 | } | |
1354 | ||
252b5132 | 1355 | /* When generating a shared object, these relocations are copied |
9b485d32 | 1356 | into the output file to be resolved at run time. */ |
7359ea65 DJ |
1357 | if (info->shared |
1358 | && (input_section->flags & SEC_ALLOC) | |
955af222 PB |
1359 | && (r_type != R_ARM_REL32 |
1360 | || !SYMBOL_CALLS_LOCAL (info, h)) | |
7359ea65 DJ |
1361 | && (h == NULL |
1362 | || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT | |
1363 | || h->root.type != bfd_link_hash_undefweak) | |
1364 | && r_type != R_ARM_PC24 | |
1365 | && r_type != R_ARM_PLT32) | |
252b5132 | 1366 | { |
947216bf AM |
1367 | Elf_Internal_Rela outrel; |
1368 | bfd_byte *loc; | |
b34976b6 | 1369 | bfd_boolean skip, relocate; |
f21f3fe0 | 1370 | |
252b5132 RH |
1371 | if (sreloc == NULL) |
1372 | { | |
1373 | const char * name; | |
f21f3fe0 | 1374 | |
252b5132 RH |
1375 | name = (bfd_elf_string_from_elf_section |
1376 | (input_bfd, | |
1377 | elf_elfheader (input_bfd)->e_shstrndx, | |
1378 | elf_section_data (input_section)->rel_hdr.sh_name)); | |
1379 | if (name == NULL) | |
1380 | return bfd_reloc_notsupported; | |
f21f3fe0 | 1381 | |
252b5132 RH |
1382 | BFD_ASSERT (strncmp (name, ".rel", 4) == 0 |
1383 | && strcmp (bfd_get_section_name (input_bfd, | |
1384 | input_section), | |
1385 | name + 4) == 0); | |
f21f3fe0 | 1386 | |
252b5132 RH |
1387 | sreloc = bfd_get_section_by_name (dynobj, name); |
1388 | BFD_ASSERT (sreloc != NULL); | |
1389 | } | |
f21f3fe0 | 1390 | |
b34976b6 AM |
1391 | skip = FALSE; |
1392 | relocate = FALSE; | |
f21f3fe0 | 1393 | |
c629eae0 JJ |
1394 | outrel.r_offset = |
1395 | _bfd_elf_section_offset (output_bfd, info, input_section, | |
1396 | rel->r_offset); | |
1397 | if (outrel.r_offset == (bfd_vma) -1) | |
b34976b6 | 1398 | skip = TRUE; |
0bb2d96a | 1399 | else if (outrel.r_offset == (bfd_vma) -2) |
b34976b6 | 1400 | skip = TRUE, relocate = TRUE; |
252b5132 RH |
1401 | outrel.r_offset += (input_section->output_section->vma |
1402 | + input_section->output_offset); | |
f21f3fe0 | 1403 | |
252b5132 | 1404 | if (skip) |
0bb2d96a | 1405 | memset (&outrel, 0, sizeof outrel); |
5e681ec4 PB |
1406 | else if (h != NULL |
1407 | && h->dynindx != -1 | |
7359ea65 | 1408 | && (!info->shared |
5e681ec4 PB |
1409 | || !info->symbolic |
1410 | || (h->elf_link_hash_flags | |
1411 | & ELF_LINK_HASH_DEF_REGULAR) == 0)) | |
1412 | outrel.r_info = ELF32_R_INFO (h->dynindx, r_type); | |
252b5132 RH |
1413 | else |
1414 | { | |
5e681ec4 PB |
1415 | /* This symbol is local, or marked to become local. */ |
1416 | relocate = TRUE; | |
1417 | outrel.r_info = ELF32_R_INFO (0, R_ARM_RELATIVE); | |
252b5132 | 1418 | } |
f21f3fe0 | 1419 | |
947216bf AM |
1420 | loc = sreloc->contents; |
1421 | loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rel); | |
1422 | bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc); | |
9a5aca8c | 1423 | |
f21f3fe0 | 1424 | /* If this reloc is against an external symbol, we do not want to |
252b5132 | 1425 | fiddle with the addend. Otherwise, we need to include the symbol |
9b485d32 | 1426 | value so that it becomes an addend for the dynamic reloc. */ |
252b5132 RH |
1427 | if (! relocate) |
1428 | return bfd_reloc_ok; | |
9a5aca8c | 1429 | |
f21f3fe0 | 1430 | return _bfd_final_link_relocate (howto, input_bfd, input_section, |
252b5132 RH |
1431 | contents, rel->r_offset, value, |
1432 | (bfd_vma) 0); | |
1433 | } | |
1434 | else switch (r_type) | |
1435 | { | |
dfc5f959 NC |
1436 | #ifndef OLD_ARM_ABI |
1437 | case R_ARM_XPC25: /* Arm BLX instruction. */ | |
1438 | #endif | |
1439 | case R_ARM_PC24: /* Arm B/BL instruction */ | |
7359ea65 | 1440 | case R_ARM_PLT32: |
dfc5f959 NC |
1441 | #ifndef OLD_ARM_ABI |
1442 | if (r_type == R_ARM_XPC25) | |
252b5132 | 1443 | { |
dfc5f959 NC |
1444 | /* Check for Arm calling Arm function. */ |
1445 | /* FIXME: Should we translate the instruction into a BL | |
1446 | instruction instead ? */ | |
1447 | if (sym_flags != STT_ARM_TFUNC) | |
8f615d07 | 1448 | (*_bfd_error_handler) (_("\ |
dfc5f959 | 1449 | %s: Warning: Arm BLX instruction targets Arm function '%s'."), |
8f615d07 AM |
1450 | bfd_archive_filename (input_bfd), |
1451 | h ? h->root.root.string : "(local)"); | |
dfc5f959 NC |
1452 | } |
1453 | else | |
1454 | #endif | |
1455 | { | |
1456 | /* Check for Arm calling Thumb function. */ | |
1457 | if (sym_flags == STT_ARM_TFUNC) | |
1458 | { | |
1459 | elf32_arm_to_thumb_stub (info, sym_name, input_bfd, output_bfd, | |
1460 | input_section, hit_data, sym_sec, rel->r_offset, | |
1461 | signed_addend, value); | |
1462 | return bfd_reloc_ok; | |
1463 | } | |
252b5132 | 1464 | } |
ba96a88f NC |
1465 | |
1466 | if ( strcmp (bfd_get_target (input_bfd), "elf32-littlearm-oabi") == 0 | |
1467 | || strcmp (bfd_get_target (input_bfd), "elf32-bigarm-oabi") == 0) | |
1468 | { | |
1469 | /* The old way of doing things. Trearing the addend as a | |
1470 | byte sized field and adding in the pipeline offset. */ | |
ba96a88f NC |
1471 | value -= (input_section->output_section->vma |
1472 | + input_section->output_offset); | |
1473 | value -= rel->r_offset; | |
1474 | value += addend; | |
f21f3fe0 | 1475 | |
ba96a88f NC |
1476 | if (! globals->no_pipeline_knowledge) |
1477 | value -= 8; | |
1478 | } | |
1479 | else | |
1480 | { | |
1481 | /* The ARM ELF ABI says that this reloc is computed as: S - P + A | |
1482 | where: | |
1483 | S is the address of the symbol in the relocation. | |
1484 | P is address of the instruction being relocated. | |
1485 | A is the addend (extracted from the instruction) in bytes. | |
f21f3fe0 | 1486 | |
ba96a88f NC |
1487 | S is held in 'value'. |
1488 | P is the base address of the section containing the instruction | |
1489 | plus the offset of the reloc into that section, ie: | |
1490 | (input_section->output_section->vma + | |
1491 | input_section->output_offset + | |
1492 | rel->r_offset). | |
1493 | A is the addend, converted into bytes, ie: | |
1494 | (signed_addend * 4) | |
1495 | ||
1496 | Note: None of these operations have knowledge of the pipeline | |
1497 | size of the processor, thus it is up to the assembler to encode | |
1498 | this information into the addend. */ | |
ba96a88f NC |
1499 | value -= (input_section->output_section->vma |
1500 | + input_section->output_offset); | |
1501 | value -= rel->r_offset; | |
1502 | value += (signed_addend << howto->size); | |
f21f3fe0 | 1503 | |
ba96a88f NC |
1504 | /* Previous versions of this code also used to add in the pipeline |
1505 | offset here. This is wrong because the linker is not supposed | |
1506 | to know about such things, and one day it might change. In order | |
1507 | to support old binaries that need the old behaviour however, so | |
1508 | we attempt to detect which ABI was used to create the reloc. */ | |
1509 | if (! globals->no_pipeline_knowledge) | |
f21f3fe0 | 1510 | { |
ba96a88f | 1511 | Elf_Internal_Ehdr * i_ehdrp; /* Elf file header, internal form */ |
f21f3fe0 | 1512 | |
ba96a88f | 1513 | i_ehdrp = elf_elfheader (input_bfd); |
f21f3fe0 | 1514 | |
ba96a88f NC |
1515 | if (i_ehdrp->e_ident[EI_OSABI] == 0) |
1516 | value -= 8; | |
1517 | } | |
1518 | } | |
23080146 | 1519 | |
dcb5e6e6 NC |
1520 | signed_addend = value; |
1521 | signed_addend >>= howto->rightshift; | |
9a5aca8c | 1522 | |
59f2c4e7 NC |
1523 | /* It is not an error for an undefined weak reference to be |
1524 | out of range. Any program that branches to such a symbol | |
9a5aca8c AM |
1525 | is going to crash anyway, so there is no point worrying |
1526 | about getting the destination exactly right. */ | |
59f2c4e7 NC |
1527 | if (! h || h->root.type != bfd_link_hash_undefweak) |
1528 | { | |
9b485d32 | 1529 | /* Perform a signed range check. */ |
dcb5e6e6 | 1530 | if ( signed_addend > ((bfd_signed_vma) (howto->dst_mask >> 1)) |
59f2c4e7 NC |
1531 | || signed_addend < - ((bfd_signed_vma) ((howto->dst_mask + 1) >> 1))) |
1532 | return bfd_reloc_overflow; | |
1533 | } | |
9a5aca8c | 1534 | |
dcb5e6e6 NC |
1535 | #ifndef OLD_ARM_ABI |
1536 | /* If necessary set the H bit in the BLX instruction. */ | |
1537 | if (r_type == R_ARM_XPC25 && ((value & 2) == 2)) | |
1538 | value = (signed_addend & howto->dst_mask) | |
1539 | | (bfd_get_32 (input_bfd, hit_data) & (~ howto->dst_mask)) | |
1540 | | (1 << 24); | |
1541 | else | |
1542 | #endif | |
1543 | value = (signed_addend & howto->dst_mask) | |
1544 | | (bfd_get_32 (input_bfd, hit_data) & (~ howto->dst_mask)); | |
252b5132 | 1545 | break; |
f21f3fe0 | 1546 | |
252b5132 RH |
1547 | case R_ARM_ABS32: |
1548 | value += addend; | |
1549 | if (sym_flags == STT_ARM_TFUNC) | |
1550 | value |= 1; | |
1551 | break; | |
f21f3fe0 | 1552 | |
252b5132 RH |
1553 | case R_ARM_REL32: |
1554 | value -= (input_section->output_section->vma | |
62efb346 | 1555 | + input_section->output_offset + rel->r_offset); |
252b5132 RH |
1556 | value += addend; |
1557 | break; | |
1558 | } | |
f21f3fe0 | 1559 | |
252b5132 RH |
1560 | bfd_put_32 (input_bfd, value, hit_data); |
1561 | return bfd_reloc_ok; | |
1562 | ||
1563 | case R_ARM_ABS8: | |
1564 | value += addend; | |
1565 | if ((long) value > 0x7f || (long) value < -0x80) | |
1566 | return bfd_reloc_overflow; | |
1567 | ||
1568 | bfd_put_8 (input_bfd, value, hit_data); | |
1569 | return bfd_reloc_ok; | |
1570 | ||
1571 | case R_ARM_ABS16: | |
1572 | value += addend; | |
1573 | ||
1574 | if ((long) value > 0x7fff || (long) value < -0x8000) | |
1575 | return bfd_reloc_overflow; | |
1576 | ||
1577 | bfd_put_16 (input_bfd, value, hit_data); | |
1578 | return bfd_reloc_ok; | |
1579 | ||
1580 | case R_ARM_ABS12: | |
1581 | /* Support ldr and str instruction for the arm */ | |
1582 | /* Also thumb b (unconditional branch). ??? Really? */ | |
1583 | value += addend; | |
1584 | ||
1585 | if ((long) value > 0x7ff || (long) value < -0x800) | |
1586 | return bfd_reloc_overflow; | |
1587 | ||
1588 | value |= (bfd_get_32 (input_bfd, hit_data) & 0xfffff000); | |
1589 | bfd_put_32 (input_bfd, value, hit_data); | |
1590 | return bfd_reloc_ok; | |
1591 | ||
1592 | case R_ARM_THM_ABS5: | |
9b485d32 | 1593 | /* Support ldr and str instructions for the thumb. */ |
acf8aed4 | 1594 | #if USE_REL |
252b5132 RH |
1595 | /* Need to refetch addend. */ |
1596 | addend = bfd_get_16 (input_bfd, hit_data) & howto->src_mask; | |
1597 | /* ??? Need to determine shift amount from operand size. */ | |
1598 | addend >>= howto->rightshift; | |
1599 | #endif | |
1600 | value += addend; | |
1601 | ||
1602 | /* ??? Isn't value unsigned? */ | |
1603 | if ((long) value > 0x1f || (long) value < -0x10) | |
1604 | return bfd_reloc_overflow; | |
1605 | ||
1606 | /* ??? Value needs to be properly shifted into place first. */ | |
1607 | value |= bfd_get_16 (input_bfd, hit_data) & 0xf83f; | |
1608 | bfd_put_16 (input_bfd, value, hit_data); | |
1609 | return bfd_reloc_ok; | |
1610 | ||
dfc5f959 NC |
1611 | #ifndef OLD_ARM_ABI |
1612 | case R_ARM_THM_XPC22: | |
1613 | #endif | |
252b5132 | 1614 | case R_ARM_THM_PC22: |
dfc5f959 | 1615 | /* Thumb BL (branch long instruction). */ |
252b5132 | 1616 | { |
b34976b6 AM |
1617 | bfd_vma relocation; |
1618 | bfd_boolean overflow = FALSE; | |
1619 | bfd_vma upper_insn = bfd_get_16 (input_bfd, hit_data); | |
1620 | bfd_vma lower_insn = bfd_get_16 (input_bfd, hit_data + 2); | |
df212a7e | 1621 | bfd_signed_vma reloc_signed_max = ((1 << (howto->bitsize - 1)) - 1) >> howto->rightshift; |
ba96a88f | 1622 | bfd_signed_vma reloc_signed_min = ~ reloc_signed_max; |
b34976b6 | 1623 | bfd_vma check; |
252b5132 | 1624 | bfd_signed_vma signed_check; |
252b5132 | 1625 | |
acf8aed4 | 1626 | #if USE_REL |
252b5132 RH |
1627 | /* Need to refetch the addend and squish the two 11 bit pieces |
1628 | together. */ | |
1629 | { | |
ba96a88f NC |
1630 | bfd_vma upper = upper_insn & 0x7ff; |
1631 | bfd_vma lower = lower_insn & 0x7ff; | |
9b485d32 | 1632 | upper = (upper ^ 0x400) - 0x400; /* Sign extend. */ |
252b5132 | 1633 | addend = (upper << 12) | (lower << 1); |
ba96a88f | 1634 | signed_addend = addend; |
252b5132 RH |
1635 | } |
1636 | #endif | |
dfc5f959 NC |
1637 | #ifndef OLD_ARM_ABI |
1638 | if (r_type == R_ARM_THM_XPC22) | |
1639 | { | |
1640 | /* Check for Thumb to Thumb call. */ | |
1641 | /* FIXME: Should we translate the instruction into a BL | |
1642 | instruction instead ? */ | |
1643 | if (sym_flags == STT_ARM_TFUNC) | |
8f615d07 | 1644 | (*_bfd_error_handler) (_("\ |
dfc5f959 | 1645 | %s: Warning: Thumb BLX instruction targets thumb function '%s'."), |
8f615d07 AM |
1646 | bfd_archive_filename (input_bfd), |
1647 | h ? h->root.root.string : "(local)"); | |
dfc5f959 NC |
1648 | } |
1649 | else | |
1650 | #endif | |
252b5132 | 1651 | { |
dfc5f959 NC |
1652 | /* If it is not a call to Thumb, assume call to Arm. |
1653 | If it is a call relative to a section name, then it is not a | |
1654 | function call at all, but rather a long jump. */ | |
1655 | if (sym_flags != STT_ARM_TFUNC && sym_flags != STT_SECTION) | |
1656 | { | |
1657 | if (elf32_thumb_to_arm_stub | |
1658 | (info, sym_name, input_bfd, output_bfd, input_section, | |
1659 | hit_data, sym_sec, rel->r_offset, signed_addend, value)) | |
1660 | return bfd_reloc_ok; | |
1661 | else | |
1662 | return bfd_reloc_dangerous; | |
1663 | } | |
252b5132 | 1664 | } |
f21f3fe0 | 1665 | |
ba96a88f | 1666 | relocation = value + signed_addend; |
f21f3fe0 | 1667 | |
252b5132 | 1668 | relocation -= (input_section->output_section->vma |
ba96a88f NC |
1669 | + input_section->output_offset |
1670 | + rel->r_offset); | |
9a5aca8c | 1671 | |
ba96a88f NC |
1672 | if (! globals->no_pipeline_knowledge) |
1673 | { | |
9b485d32 | 1674 | Elf_Internal_Ehdr * i_ehdrp; /* Elf file header, internal form. */ |
9a5aca8c | 1675 | |
ba96a88f | 1676 | i_ehdrp = elf_elfheader (input_bfd); |
f21f3fe0 | 1677 | |
ba96a88f NC |
1678 | /* Previous versions of this code also used to add in the pipline |
1679 | offset here. This is wrong because the linker is not supposed | |
1680 | to know about such things, and one day it might change. In order | |
1681 | to support old binaries that need the old behaviour however, so | |
1682 | we attempt to detect which ABI was used to create the reloc. */ | |
1683 | if ( strcmp (bfd_get_target (input_bfd), "elf32-littlearm-oabi") == 0 | |
1684 | || strcmp (bfd_get_target (input_bfd), "elf32-bigarm-oabi") == 0 | |
1685 | || i_ehdrp->e_ident[EI_OSABI] == 0) | |
1686 | relocation += 4; | |
1687 | } | |
f21f3fe0 | 1688 | |
252b5132 RH |
1689 | check = relocation >> howto->rightshift; |
1690 | ||
1691 | /* If this is a signed value, the rightshift just dropped | |
1692 | leading 1 bits (assuming twos complement). */ | |
1693 | if ((bfd_signed_vma) relocation >= 0) | |
1694 | signed_check = check; | |
1695 | else | |
1696 | signed_check = check | ~((bfd_vma) -1 >> howto->rightshift); | |
1697 | ||
252b5132 | 1698 | /* Assumes two's complement. */ |
ba96a88f | 1699 | if (signed_check > reloc_signed_max || signed_check < reloc_signed_min) |
b34976b6 | 1700 | overflow = TRUE; |
252b5132 | 1701 | |
df425bc0 | 1702 | #ifndef OLD_ARM_ABI |
4f3c3dbb NC |
1703 | if (r_type == R_ARM_THM_XPC22 |
1704 | && ((lower_insn & 0x1800) == 0x0800)) | |
c62e1cc3 NC |
1705 | /* For a BLX instruction, make sure that the relocation is rounded up |
1706 | to a word boundary. This follows the semantics of the instruction | |
1707 | which specifies that bit 1 of the target address will come from bit | |
1708 | 1 of the base address. */ | |
1709 | relocation = (relocation + 2) & ~ 3; | |
99e4ae17 | 1710 | #endif |
c62e1cc3 NC |
1711 | /* Put RELOCATION back into the insn. */ |
1712 | upper_insn = (upper_insn & ~(bfd_vma) 0x7ff) | ((relocation >> 12) & 0x7ff); | |
1713 | lower_insn = (lower_insn & ~(bfd_vma) 0x7ff) | ((relocation >> 1) & 0x7ff); | |
1714 | ||
252b5132 RH |
1715 | /* Put the relocated value back in the object file: */ |
1716 | bfd_put_16 (input_bfd, upper_insn, hit_data); | |
1717 | bfd_put_16 (input_bfd, lower_insn, hit_data + 2); | |
1718 | ||
1719 | return (overflow ? bfd_reloc_overflow : bfd_reloc_ok); | |
1720 | } | |
1721 | break; | |
1722 | ||
51c5503b NC |
1723 | case R_ARM_THM_PC11: |
1724 | /* Thumb B (branch) instruction). */ | |
1725 | { | |
6cf9e9fe | 1726 | bfd_signed_vma relocation; |
51c5503b NC |
1727 | bfd_signed_vma reloc_signed_max = (1 << (howto->bitsize - 1)) - 1; |
1728 | bfd_signed_vma reloc_signed_min = ~ reloc_signed_max; | |
51c5503b NC |
1729 | bfd_signed_vma signed_check; |
1730 | ||
acf8aed4 | 1731 | #if USE_REL |
51c5503b NC |
1732 | /* Need to refetch addend. */ |
1733 | addend = bfd_get_16 (input_bfd, hit_data) & howto->src_mask; | |
6cf9e9fe NC |
1734 | if (addend & ((howto->src_mask + 1) >> 1)) |
1735 | { | |
1736 | signed_addend = -1; | |
1737 | signed_addend &= ~ howto->src_mask; | |
1738 | signed_addend |= addend; | |
1739 | } | |
1740 | else | |
1741 | signed_addend = addend; | |
1742 | /* The value in the insn has been right shifted. We need to | |
1743 | undo this, so that we can perform the address calculation | |
1744 | in terms of bytes. */ | |
1745 | signed_addend <<= howto->rightshift; | |
51c5503b | 1746 | #endif |
6cf9e9fe | 1747 | relocation = value + signed_addend; |
51c5503b NC |
1748 | |
1749 | relocation -= (input_section->output_section->vma | |
1750 | + input_section->output_offset | |
1751 | + rel->r_offset); | |
1752 | ||
6cf9e9fe NC |
1753 | relocation >>= howto->rightshift; |
1754 | signed_check = relocation; | |
1755 | relocation &= howto->dst_mask; | |
51c5503b | 1756 | relocation |= (bfd_get_16 (input_bfd, hit_data) & (~ howto->dst_mask)); |
cedb70c5 | 1757 | |
51c5503b NC |
1758 | bfd_put_16 (input_bfd, relocation, hit_data); |
1759 | ||
1760 | /* Assumes two's complement. */ | |
1761 | if (signed_check > reloc_signed_max || signed_check < reloc_signed_min) | |
1762 | return bfd_reloc_overflow; | |
1763 | ||
1764 | return bfd_reloc_ok; | |
1765 | } | |
cedb70c5 | 1766 | |
1f433d93 | 1767 | #ifndef OLD_ARM_ABI |
8375c36b PB |
1768 | case R_ARM_ALU_PCREL7_0: |
1769 | case R_ARM_ALU_PCREL15_8: | |
1770 | case R_ARM_ALU_PCREL23_15: | |
1771 | { | |
1772 | bfd_vma insn; | |
1773 | bfd_vma relocation; | |
1774 | ||
1775 | insn = bfd_get_32 (input_bfd, hit_data); | |
1776 | #if USE_REL | |
1777 | /* Extract the addend. */ | |
1778 | addend = (insn & 0xff) << ((insn & 0xf00) >> 7); | |
1779 | signed_addend = addend; | |
1780 | #endif | |
1781 | relocation = value + signed_addend; | |
1782 | ||
1783 | relocation -= (input_section->output_section->vma | |
1784 | + input_section->output_offset | |
1785 | + rel->r_offset); | |
1786 | insn = (insn & ~0xfff) | |
1787 | | ((howto->bitpos << 7) & 0xf00) | |
1788 | | ((relocation >> howto->bitpos) & 0xff); | |
1789 | bfd_put_32 (input_bfd, value, hit_data); | |
1790 | } | |
1791 | return bfd_reloc_ok; | |
1f433d93 | 1792 | #endif |
8375c36b | 1793 | |
252b5132 RH |
1794 | case R_ARM_GNU_VTINHERIT: |
1795 | case R_ARM_GNU_VTENTRY: | |
1796 | return bfd_reloc_ok; | |
1797 | ||
1798 | case R_ARM_COPY: | |
1799 | return bfd_reloc_notsupported; | |
1800 | ||
1801 | case R_ARM_GLOB_DAT: | |
1802 | return bfd_reloc_notsupported; | |
1803 | ||
1804 | case R_ARM_JUMP_SLOT: | |
1805 | return bfd_reloc_notsupported; | |
1806 | ||
1807 | case R_ARM_RELATIVE: | |
1808 | return bfd_reloc_notsupported; | |
1809 | ||
1810 | case R_ARM_GOTOFF: | |
1811 | /* Relocation is relative to the start of the | |
1812 | global offset table. */ | |
1813 | ||
1814 | BFD_ASSERT (sgot != NULL); | |
1815 | if (sgot == NULL) | |
1816 | return bfd_reloc_notsupported; | |
9a5aca8c | 1817 | |
cedb70c5 | 1818 | /* If we are addressing a Thumb function, we need to adjust the |
ee29b9fb RE |
1819 | address by one, so that attempts to call the function pointer will |
1820 | correctly interpret it as Thumb code. */ | |
1821 | if (sym_flags == STT_ARM_TFUNC) | |
1822 | value += 1; | |
1823 | ||
252b5132 RH |
1824 | /* Note that sgot->output_offset is not involved in this |
1825 | calculation. We always want the start of .got. If we | |
1826 | define _GLOBAL_OFFSET_TABLE in a different way, as is | |
1827 | permitted by the ABI, we might have to change this | |
9b485d32 | 1828 | calculation. */ |
252b5132 | 1829 | value -= sgot->output_section->vma; |
f21f3fe0 | 1830 | return _bfd_final_link_relocate (howto, input_bfd, input_section, |
99e4ae17 AJ |
1831 | contents, rel->r_offset, value, |
1832 | (bfd_vma) 0); | |
252b5132 RH |
1833 | |
1834 | case R_ARM_GOTPC: | |
a7c10850 | 1835 | /* Use global offset table as symbol value. */ |
252b5132 | 1836 | BFD_ASSERT (sgot != NULL); |
f21f3fe0 | 1837 | |
252b5132 RH |
1838 | if (sgot == NULL) |
1839 | return bfd_reloc_notsupported; | |
1840 | ||
1841 | value = sgot->output_section->vma; | |
f21f3fe0 | 1842 | return _bfd_final_link_relocate (howto, input_bfd, input_section, |
99e4ae17 AJ |
1843 | contents, rel->r_offset, value, |
1844 | (bfd_vma) 0); | |
f21f3fe0 | 1845 | |
252b5132 RH |
1846 | case R_ARM_GOT32: |
1847 | /* Relocation is to the entry for this symbol in the | |
9b485d32 | 1848 | global offset table. */ |
252b5132 RH |
1849 | if (sgot == NULL) |
1850 | return bfd_reloc_notsupported; | |
f21f3fe0 | 1851 | |
252b5132 RH |
1852 | if (h != NULL) |
1853 | { | |
1854 | bfd_vma off; | |
5e681ec4 | 1855 | bfd_boolean dyn; |
f21f3fe0 | 1856 | |
252b5132 RH |
1857 | off = h->got.offset; |
1858 | BFD_ASSERT (off != (bfd_vma) -1); | |
5e681ec4 | 1859 | dyn = globals->root.dynamic_sections_created; |
f21f3fe0 | 1860 | |
5e681ec4 | 1861 | if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h) |
50d6c878 | 1862 | || (info->shared |
5e681ec4 PB |
1863 | && SYMBOL_REFERENCES_LOCAL (info, h)) |
1864 | || (ELF_ST_VISIBILITY (h->other) | |
1865 | && h->root.type == bfd_link_hash_undefweak)) | |
252b5132 RH |
1866 | { |
1867 | /* This is actually a static link, or it is a -Bsymbolic link | |
1868 | and the symbol is defined locally. We must initialize this | |
1869 | entry in the global offset table. Since the offset must | |
1870 | always be a multiple of 4, we use the least significant bit | |
1871 | to record whether we have initialized it already. | |
f21f3fe0 | 1872 | |
252b5132 | 1873 | When doing a dynamic link, we create a .rel.got relocation |
f21f3fe0 | 1874 | entry to initialize the value. This is done in the |
9b485d32 | 1875 | finish_dynamic_symbol routine. */ |
252b5132 RH |
1876 | if ((off & 1) != 0) |
1877 | off &= ~1; | |
1878 | else | |
1879 | { | |
ee29b9fb RE |
1880 | /* If we are addressing a Thumb function, we need to |
1881 | adjust the address by one, so that attempts to | |
1882 | call the function pointer will correctly | |
1883 | interpret it as Thumb code. */ | |
1884 | if (sym_flags == STT_ARM_TFUNC) | |
1885 | value |= 1; | |
1886 | ||
252b5132 RH |
1887 | bfd_put_32 (output_bfd, value, sgot->contents + off); |
1888 | h->got.offset |= 1; | |
1889 | } | |
1890 | } | |
f21f3fe0 | 1891 | |
252b5132 RH |
1892 | value = sgot->output_offset + off; |
1893 | } | |
1894 | else | |
1895 | { | |
1896 | bfd_vma off; | |
f21f3fe0 | 1897 | |
252b5132 RH |
1898 | BFD_ASSERT (local_got_offsets != NULL && |
1899 | local_got_offsets[r_symndx] != (bfd_vma) -1); | |
f21f3fe0 | 1900 | |
252b5132 | 1901 | off = local_got_offsets[r_symndx]; |
f21f3fe0 | 1902 | |
252b5132 RH |
1903 | /* The offset must always be a multiple of 4. We use the |
1904 | least significant bit to record whether we have already | |
9b485d32 | 1905 | generated the necessary reloc. */ |
252b5132 RH |
1906 | if ((off & 1) != 0) |
1907 | off &= ~1; | |
1908 | else | |
1909 | { | |
1910 | bfd_put_32 (output_bfd, value, sgot->contents + off); | |
f21f3fe0 | 1911 | |
252b5132 RH |
1912 | if (info->shared) |
1913 | { | |
1914 | asection * srelgot; | |
947216bf AM |
1915 | Elf_Internal_Rela outrel; |
1916 | bfd_byte *loc; | |
f21f3fe0 | 1917 | |
252b5132 RH |
1918 | srelgot = bfd_get_section_by_name (dynobj, ".rel.got"); |
1919 | BFD_ASSERT (srelgot != NULL); | |
f21f3fe0 | 1920 | |
252b5132 | 1921 | outrel.r_offset = (sgot->output_section->vma |
f21f3fe0 | 1922 | + sgot->output_offset |
252b5132 RH |
1923 | + off); |
1924 | outrel.r_info = ELF32_R_INFO (0, R_ARM_RELATIVE); | |
947216bf AM |
1925 | loc = srelgot->contents; |
1926 | loc += srelgot->reloc_count++ * sizeof (Elf32_External_Rel); | |
1927 | bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc); | |
252b5132 | 1928 | } |
f21f3fe0 | 1929 | |
252b5132 RH |
1930 | local_got_offsets[r_symndx] |= 1; |
1931 | } | |
f21f3fe0 | 1932 | |
252b5132 RH |
1933 | value = sgot->output_offset + off; |
1934 | } | |
9a5aca8c | 1935 | |
f21f3fe0 | 1936 | return _bfd_final_link_relocate (howto, input_bfd, input_section, |
99e4ae17 AJ |
1937 | contents, rel->r_offset, value, |
1938 | (bfd_vma) 0); | |
f21f3fe0 | 1939 | |
252b5132 RH |
1940 | case R_ARM_SBREL32: |
1941 | return bfd_reloc_notsupported; | |
1942 | ||
1943 | case R_ARM_AMP_VCALL9: | |
1944 | return bfd_reloc_notsupported; | |
1945 | ||
1946 | case R_ARM_RSBREL32: | |
1947 | return bfd_reloc_notsupported; | |
1948 | ||
1949 | case R_ARM_THM_RPC22: | |
1950 | return bfd_reloc_notsupported; | |
1951 | ||
1952 | case R_ARM_RREL32: | |
1953 | return bfd_reloc_notsupported; | |
1954 | ||
1955 | case R_ARM_RABS32: | |
1956 | return bfd_reloc_notsupported; | |
1957 | ||
1958 | case R_ARM_RPC24: | |
1959 | return bfd_reloc_notsupported; | |
1960 | ||
1961 | case R_ARM_RBASE: | |
1962 | return bfd_reloc_notsupported; | |
1963 | ||
1964 | default: | |
1965 | return bfd_reloc_notsupported; | |
1966 | } | |
1967 | } | |
1968 | ||
acf8aed4 | 1969 | #if USE_REL |
98c1d4aa NC |
1970 | /* Add INCREMENT to the reloc (of type HOWTO) at ADDRESS. */ |
1971 | static void | |
1972 | arm_add_to_rel (abfd, address, howto, increment) | |
1973 | bfd * abfd; | |
59f2c4e7 | 1974 | bfd_byte * address; |
98c1d4aa NC |
1975 | reloc_howto_type * howto; |
1976 | bfd_signed_vma increment; | |
1977 | { | |
98c1d4aa NC |
1978 | bfd_signed_vma addend; |
1979 | ||
9a5aca8c | 1980 | if (howto->type == R_ARM_THM_PC22) |
98c1d4aa | 1981 | { |
9a5aca8c AM |
1982 | int upper_insn, lower_insn; |
1983 | int upper, lower; | |
98c1d4aa | 1984 | |
9a5aca8c AM |
1985 | upper_insn = bfd_get_16 (abfd, address); |
1986 | lower_insn = bfd_get_16 (abfd, address + 2); | |
1987 | upper = upper_insn & 0x7ff; | |
1988 | lower = lower_insn & 0x7ff; | |
1989 | ||
1990 | addend = (upper << 12) | (lower << 1); | |
ddda4409 | 1991 | addend += increment; |
9a5aca8c | 1992 | addend >>= 1; |
98c1d4aa | 1993 | |
9a5aca8c AM |
1994 | upper_insn = (upper_insn & 0xf800) | ((addend >> 11) & 0x7ff); |
1995 | lower_insn = (lower_insn & 0xf800) | (addend & 0x7ff); | |
1996 | ||
dc810e39 AM |
1997 | bfd_put_16 (abfd, (bfd_vma) upper_insn, address); |
1998 | bfd_put_16 (abfd, (bfd_vma) lower_insn, address + 2); | |
9a5aca8c AM |
1999 | } |
2000 | else | |
2001 | { | |
2002 | bfd_vma contents; | |
2003 | ||
2004 | contents = bfd_get_32 (abfd, address); | |
2005 | ||
2006 | /* Get the (signed) value from the instruction. */ | |
2007 | addend = contents & howto->src_mask; | |
2008 | if (addend & ((howto->src_mask + 1) >> 1)) | |
2009 | { | |
2010 | bfd_signed_vma mask; | |
2011 | ||
2012 | mask = -1; | |
2013 | mask &= ~ howto->src_mask; | |
2014 | addend |= mask; | |
2015 | } | |
2016 | ||
2017 | /* Add in the increment, (which is a byte value). */ | |
2018 | switch (howto->type) | |
2019 | { | |
2020 | default: | |
2021 | addend += increment; | |
2022 | break; | |
2023 | ||
2024 | case R_ARM_PC24: | |
2025 | addend <<= howto->size; | |
dc810e39 | 2026 | addend += increment; |
9a5aca8c AM |
2027 | |
2028 | /* Should we check for overflow here ? */ | |
2029 | ||
2030 | /* Drop any undesired bits. */ | |
2031 | addend >>= howto->rightshift; | |
2032 | break; | |
2033 | } | |
2034 | ||
2035 | contents = (contents & ~ howto->dst_mask) | (addend & howto->dst_mask); | |
2036 | ||
2037 | bfd_put_32 (abfd, contents, address); | |
ddda4409 | 2038 | } |
98c1d4aa NC |
2039 | } |
2040 | #endif /* USE_REL */ | |
252b5132 RH |
2041 | |
2042 | /* Relocate an ARM ELF section. */ | |
b34976b6 | 2043 | static bfd_boolean |
252b5132 RH |
2044 | elf32_arm_relocate_section (output_bfd, info, input_bfd, input_section, |
2045 | contents, relocs, local_syms, local_sections) | |
b34976b6 AM |
2046 | bfd *output_bfd; |
2047 | struct bfd_link_info *info; | |
2048 | bfd *input_bfd; | |
2049 | asection *input_section; | |
2050 | bfd_byte *contents; | |
2051 | Elf_Internal_Rela *relocs; | |
2052 | Elf_Internal_Sym *local_syms; | |
2053 | asection **local_sections; | |
252b5132 | 2054 | { |
b34976b6 AM |
2055 | Elf_Internal_Shdr *symtab_hdr; |
2056 | struct elf_link_hash_entry **sym_hashes; | |
2057 | Elf_Internal_Rela *rel; | |
2058 | Elf_Internal_Rela *relend; | |
2059 | const char *name; | |
252b5132 | 2060 | |
acf8aed4 | 2061 | #if !USE_REL |
1049f94e | 2062 | if (info->relocatable) |
b34976b6 | 2063 | return TRUE; |
b491616a AM |
2064 | #endif |
2065 | ||
252b5132 RH |
2066 | symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr; |
2067 | sym_hashes = elf_sym_hashes (input_bfd); | |
2068 | ||
2069 | rel = relocs; | |
2070 | relend = relocs + input_section->reloc_count; | |
2071 | for (; rel < relend; rel++) | |
2072 | { | |
ba96a88f NC |
2073 | int r_type; |
2074 | reloc_howto_type * howto; | |
2075 | unsigned long r_symndx; | |
2076 | Elf_Internal_Sym * sym; | |
2077 | asection * sec; | |
252b5132 | 2078 | struct elf_link_hash_entry * h; |
ba96a88f NC |
2079 | bfd_vma relocation; |
2080 | bfd_reloc_status_type r; | |
2081 | arelent bfd_reloc; | |
f21f3fe0 | 2082 | |
252b5132 | 2083 | r_symndx = ELF32_R_SYM (rel->r_info); |
ba96a88f | 2084 | r_type = ELF32_R_TYPE (rel->r_info); |
252b5132 | 2085 | |
ba96a88f NC |
2086 | if ( r_type == R_ARM_GNU_VTENTRY |
2087 | || r_type == R_ARM_GNU_VTINHERIT) | |
252b5132 RH |
2088 | continue; |
2089 | ||
dc810e39 | 2090 | elf32_arm_info_to_howto (input_bfd, & bfd_reloc, rel); |
ba96a88f | 2091 | howto = bfd_reloc.howto; |
252b5132 | 2092 | |
acf8aed4 | 2093 | #if USE_REL |
1049f94e | 2094 | if (info->relocatable) |
252b5132 | 2095 | { |
1049f94e | 2096 | /* This is a relocatable link. We don't have to change |
252b5132 RH |
2097 | anything, unless the reloc is against a section symbol, |
2098 | in which case we have to adjust according to where the | |
2099 | section symbol winds up in the output section. */ | |
2100 | if (r_symndx < symtab_hdr->sh_info) | |
2101 | { | |
2102 | sym = local_syms + r_symndx; | |
2103 | if (ELF_ST_TYPE (sym->st_info) == STT_SECTION) | |
2104 | { | |
2105 | sec = local_sections[r_symndx]; | |
98c1d4aa | 2106 | arm_add_to_rel (input_bfd, contents + rel->r_offset, |
dc810e39 AM |
2107 | howto, |
2108 | (bfd_signed_vma) (sec->output_offset | |
2109 | + sym->st_value)); | |
252b5132 RH |
2110 | } |
2111 | } | |
2112 | ||
2113 | continue; | |
2114 | } | |
b491616a | 2115 | #endif |
252b5132 RH |
2116 | |
2117 | /* This is a final link. */ | |
2118 | h = NULL; | |
2119 | sym = NULL; | |
2120 | sec = NULL; | |
9b485d32 | 2121 | |
252b5132 RH |
2122 | if (r_symndx < symtab_hdr->sh_info) |
2123 | { | |
2124 | sym = local_syms + r_symndx; | |
2125 | sec = local_sections[r_symndx]; | |
acf8aed4 | 2126 | #if USE_REL |
252b5132 RH |
2127 | relocation = (sec->output_section->vma |
2128 | + sec->output_offset | |
2129 | + sym->st_value); | |
f8df10f4 JJ |
2130 | if ((sec->flags & SEC_MERGE) |
2131 | && ELF_ST_TYPE (sym->st_info) == STT_SECTION) | |
2132 | { | |
2133 | asection *msec; | |
2134 | bfd_vma addend, value; | |
2135 | ||
2136 | if (howto->rightshift) | |
2137 | { | |
2138 | (*_bfd_error_handler) | |
2139 | (_("%s(%s+0x%lx): %s relocation against SEC_MERGE section"), | |
2140 | bfd_archive_filename (input_bfd), | |
2141 | bfd_get_section_name (input_bfd, input_section), | |
2142 | (long) rel->r_offset, howto->name); | |
b34976b6 | 2143 | return FALSE; |
f8df10f4 JJ |
2144 | } |
2145 | ||
2146 | value = bfd_get_32 (input_bfd, contents + rel->r_offset); | |
2147 | ||
2148 | /* Get the (signed) value from the instruction. */ | |
2149 | addend = value & howto->src_mask; | |
2150 | if (addend & ((howto->src_mask + 1) >> 1)) | |
2151 | { | |
2152 | bfd_signed_vma mask; | |
2153 | ||
2154 | mask = -1; | |
2155 | mask &= ~ howto->src_mask; | |
2156 | addend |= mask; | |
2157 | } | |
2158 | msec = sec; | |
2159 | addend = | |
c629eae0 | 2160 | _bfd_elf_rel_local_sym (output_bfd, sym, &msec, addend) |
f8df10f4 JJ |
2161 | - relocation; |
2162 | addend += msec->output_section->vma + msec->output_offset; | |
2163 | value = (value & ~ howto->dst_mask) | (addend & howto->dst_mask); | |
2164 | bfd_put_32 (input_bfd, value, contents + rel->r_offset); | |
2165 | } | |
2166 | #else | |
8517fae7 | 2167 | relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel); |
f8df10f4 | 2168 | #endif |
252b5132 RH |
2169 | } |
2170 | else | |
2171 | { | |
560e09e9 NC |
2172 | bfd_boolean warned; |
2173 | bfd_boolean unresolved_reloc; | |
2174 | ||
b2a8e766 AM |
2175 | RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, |
2176 | r_symndx, symtab_hdr, sym_hashes, | |
2177 | h, sec, relocation, | |
2178 | unresolved_reloc, warned); | |
560e09e9 NC |
2179 | |
2180 | if (unresolved_reloc || relocation != 0) | |
252b5132 | 2181 | { |
252b5132 | 2182 | /* In these cases, we don't need the relocation value. |
f21f3fe0 | 2183 | We check specially because in some obscure cases |
9b485d32 | 2184 | sec->output_section will be NULL. */ |
252b5132 RH |
2185 | switch (r_type) |
2186 | { | |
2187 | case R_ARM_PC24: | |
2188 | case R_ARM_ABS32: | |
6a360bf4 | 2189 | case R_ARM_THM_PC22: |
ecb2d096 DJ |
2190 | case R_ARM_PLT32: |
2191 | ||
252b5132 RH |
2192 | if (info->shared |
2193 | && ( | |
5e681ec4 | 2194 | (!info->symbolic && h->dynindx != -1) |
97eaf9de | 2195 | || (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0 |
252b5132 | 2196 | ) |
5e681ec4 | 2197 | && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT |
05924f36 PB |
2198 | && ((input_section->flags & SEC_ALLOC) != 0 |
2199 | /* DWARF will emit R_ARM_ABS32 relocations in its | |
2200 | sections against symbols defined externally | |
2201 | in shared libraries. We can't do anything | |
2202 | with them here. */ | |
2203 | || ((input_section->flags & SEC_DEBUGGING) != 0 | |
2204 | && (h->elf_link_hash_flags | |
2205 | & ELF_LINK_HASH_DEF_DYNAMIC) != 0)) | |
252b5132 | 2206 | ) |
560e09e9 | 2207 | relocation = 0; |
252b5132 | 2208 | break; |
f21f3fe0 | 2209 | |
252b5132 | 2210 | case R_ARM_GOTPC: |
560e09e9 | 2211 | relocation = 0; |
252b5132 | 2212 | break; |
f21f3fe0 | 2213 | |
252b5132 | 2214 | case R_ARM_GOT32: |
50d6c878 | 2215 | if ((WILL_CALL_FINISH_DYNAMIC_SYMBOL |
560e09e9 | 2216 | (elf_hash_table (info)->dynamic_sections_created, |
50d6c878 DJ |
2217 | info->shared, h)) |
2218 | && (!info->shared | |
252b5132 | 2219 | || (!info->symbolic && h->dynindx != -1) |
50d6c878 DJ |
2220 | || (h->elf_link_hash_flags |
2221 | & ELF_LINK_HASH_DEF_REGULAR) == 0)) | |
560e09e9 | 2222 | relocation = 0; |
252b5132 | 2223 | break; |
f21f3fe0 | 2224 | |
252b5132 | 2225 | default: |
560e09e9 NC |
2226 | if (unresolved_reloc) |
2227 | _bfd_error_handler | |
2228 | (_("%s: warning: unresolvable relocation %d against symbol `%s' from %s section"), | |
2229 | bfd_archive_filename (input_bfd), | |
2230 | r_type, | |
2231 | h->root.root.string, | |
2232 | bfd_get_section_name (input_bfd, input_section)); | |
2233 | break; | |
252b5132 | 2234 | } |
252b5132 RH |
2235 | } |
2236 | } | |
2237 | ||
2238 | if (h != NULL) | |
2239 | name = h->root.root.string; | |
2240 | else | |
2241 | { | |
2242 | name = (bfd_elf_string_from_elf_section | |
2243 | (input_bfd, symtab_hdr->sh_link, sym->st_name)); | |
2244 | if (name == NULL || *name == '\0') | |
2245 | name = bfd_section_name (input_bfd, sec); | |
2246 | } | |
f21f3fe0 | 2247 | |
252b5132 RH |
2248 | r = elf32_arm_final_link_relocate (howto, input_bfd, output_bfd, |
2249 | input_section, contents, rel, | |
2250 | relocation, info, sec, name, | |
2251 | (h ? ELF_ST_TYPE (h->type) : | |
780a67af | 2252 | ELF_ST_TYPE (sym->st_info)), h); |
252b5132 RH |
2253 | |
2254 | if (r != bfd_reloc_ok) | |
2255 | { | |
2256 | const char * msg = (const char *) 0; | |
2257 | ||
2258 | switch (r) | |
2259 | { | |
2260 | case bfd_reloc_overflow: | |
cf919dfd PB |
2261 | /* If the overflowing reloc was to an undefined symbol, |
2262 | we have already printed one error message and there | |
2263 | is no point complaining again. */ | |
2264 | if ((! h || | |
2265 | h->root.type != bfd_link_hash_undefined) | |
2266 | && (!((*info->callbacks->reloc_overflow) | |
2267 | (info, name, howto->name, (bfd_vma) 0, | |
2268 | input_bfd, input_section, rel->r_offset)))) | |
b34976b6 | 2269 | return FALSE; |
252b5132 RH |
2270 | break; |
2271 | ||
2272 | case bfd_reloc_undefined: | |
2273 | if (!((*info->callbacks->undefined_symbol) | |
2274 | (info, name, input_bfd, input_section, | |
b34976b6 AM |
2275 | rel->r_offset, TRUE))) |
2276 | return FALSE; | |
252b5132 RH |
2277 | break; |
2278 | ||
2279 | case bfd_reloc_outofrange: | |
9b485d32 | 2280 | msg = _("internal error: out of range error"); |
252b5132 RH |
2281 | goto common_error; |
2282 | ||
2283 | case bfd_reloc_notsupported: | |
9b485d32 | 2284 | msg = _("internal error: unsupported relocation error"); |
252b5132 RH |
2285 | goto common_error; |
2286 | ||
2287 | case bfd_reloc_dangerous: | |
9b485d32 | 2288 | msg = _("internal error: dangerous error"); |
252b5132 RH |
2289 | goto common_error; |
2290 | ||
2291 | default: | |
9b485d32 | 2292 | msg = _("internal error: unknown error"); |
252b5132 RH |
2293 | /* fall through */ |
2294 | ||
2295 | common_error: | |
2296 | if (!((*info->callbacks->warning) | |
2297 | (info, msg, name, input_bfd, input_section, | |
2298 | rel->r_offset))) | |
b34976b6 | 2299 | return FALSE; |
252b5132 RH |
2300 | break; |
2301 | } | |
2302 | } | |
2303 | } | |
2304 | ||
b34976b6 | 2305 | return TRUE; |
252b5132 RH |
2306 | } |
2307 | ||
c178919b NC |
2308 | /* Set the right machine number. */ |
2309 | ||
2310 | static bfd_boolean | |
2311 | elf32_arm_object_p (abfd) | |
2312 | bfd *abfd; | |
2313 | { | |
5a6c6817 NC |
2314 | unsigned int mach; |
2315 | ||
2316 | mach = bfd_arm_get_mach_from_notes (abfd, ARM_NOTE_SECTION); | |
c178919b | 2317 | |
5a6c6817 NC |
2318 | if (mach != bfd_mach_arm_unknown) |
2319 | bfd_default_set_arch_mach (abfd, bfd_arch_arm, mach); | |
2320 | ||
2321 | else if (elf_elfheader (abfd)->e_flags & EF_ARM_MAVERICK_FLOAT) | |
2322 | bfd_default_set_arch_mach (abfd, bfd_arch_arm, bfd_mach_arm_ep9312); | |
e16bb312 | 2323 | |
e16bb312 | 2324 | else |
5a6c6817 | 2325 | bfd_default_set_arch_mach (abfd, bfd_arch_arm, mach); |
c178919b NC |
2326 | |
2327 | return TRUE; | |
2328 | } | |
2329 | ||
fc830a83 | 2330 | /* Function to keep ARM specific flags in the ELF header. */ |
b34976b6 | 2331 | static bfd_boolean |
252b5132 RH |
2332 | elf32_arm_set_private_flags (abfd, flags) |
2333 | bfd *abfd; | |
2334 | flagword flags; | |
2335 | { | |
2336 | if (elf_flags_init (abfd) | |
2337 | && elf_elfheader (abfd)->e_flags != flags) | |
2338 | { | |
fc830a83 NC |
2339 | if (EF_ARM_EABI_VERSION (flags) == EF_ARM_EABI_UNKNOWN) |
2340 | { | |
fd2ec330 | 2341 | if (flags & EF_ARM_INTERWORK) |
8f615d07 | 2342 | (*_bfd_error_handler) (_("\ |
ae1a89b7 | 2343 | Warning: Not setting interworking flag of %s since it has already been specified as non-interworking"), |
8f615d07 | 2344 | bfd_archive_filename (abfd)); |
fc830a83 | 2345 | else |
63b0f745 | 2346 | _bfd_error_handler (_("\ |
ae1a89b7 | 2347 | Warning: Clearing the interworking flag of %s due to outside request"), |
63b0f745 | 2348 | bfd_archive_filename (abfd)); |
fc830a83 | 2349 | } |
252b5132 RH |
2350 | } |
2351 | else | |
2352 | { | |
2353 | elf_elfheader (abfd)->e_flags = flags; | |
b34976b6 | 2354 | elf_flags_init (abfd) = TRUE; |
252b5132 RH |
2355 | } |
2356 | ||
b34976b6 | 2357 | return TRUE; |
252b5132 RH |
2358 | } |
2359 | ||
fc830a83 | 2360 | /* Copy backend specific data from one object module to another. */ |
9b485d32 | 2361 | |
b34976b6 | 2362 | static bfd_boolean |
252b5132 RH |
2363 | elf32_arm_copy_private_bfd_data (ibfd, obfd) |
2364 | bfd *ibfd; | |
2365 | bfd *obfd; | |
2366 | { | |
2367 | flagword in_flags; | |
2368 | flagword out_flags; | |
2369 | ||
fc830a83 | 2370 | if ( bfd_get_flavour (ibfd) != bfd_target_elf_flavour |
252b5132 | 2371 | || bfd_get_flavour (obfd) != bfd_target_elf_flavour) |
b34976b6 | 2372 | return TRUE; |
252b5132 | 2373 | |
fc830a83 | 2374 | in_flags = elf_elfheader (ibfd)->e_flags; |
252b5132 RH |
2375 | out_flags = elf_elfheader (obfd)->e_flags; |
2376 | ||
fc830a83 NC |
2377 | if (elf_flags_init (obfd) |
2378 | && EF_ARM_EABI_VERSION (out_flags) == EF_ARM_EABI_UNKNOWN | |
2379 | && in_flags != out_flags) | |
252b5132 | 2380 | { |
252b5132 | 2381 | /* Cannot mix APCS26 and APCS32 code. */ |
fd2ec330 | 2382 | if ((in_flags & EF_ARM_APCS_26) != (out_flags & EF_ARM_APCS_26)) |
b34976b6 | 2383 | return FALSE; |
252b5132 RH |
2384 | |
2385 | /* Cannot mix float APCS and non-float APCS code. */ | |
fd2ec330 | 2386 | if ((in_flags & EF_ARM_APCS_FLOAT) != (out_flags & EF_ARM_APCS_FLOAT)) |
b34976b6 | 2387 | return FALSE; |
252b5132 RH |
2388 | |
2389 | /* If the src and dest have different interworking flags | |
2390 | then turn off the interworking bit. */ | |
fd2ec330 | 2391 | if ((in_flags & EF_ARM_INTERWORK) != (out_flags & EF_ARM_INTERWORK)) |
252b5132 | 2392 | { |
fd2ec330 | 2393 | if (out_flags & EF_ARM_INTERWORK) |
63b0f745 | 2394 | _bfd_error_handler (_("\ |
ae1a89b7 | 2395 | Warning: Clearing the interworking flag of %s because non-interworking code in %s has been linked with it"), |
06317a27 | 2396 | bfd_get_filename (obfd), |
63b0f745 | 2397 | bfd_archive_filename (ibfd)); |
252b5132 | 2398 | |
fd2ec330 | 2399 | in_flags &= ~EF_ARM_INTERWORK; |
252b5132 | 2400 | } |
1006ba19 PB |
2401 | |
2402 | /* Likewise for PIC, though don't warn for this case. */ | |
fd2ec330 PB |
2403 | if ((in_flags & EF_ARM_PIC) != (out_flags & EF_ARM_PIC)) |
2404 | in_flags &= ~EF_ARM_PIC; | |
252b5132 RH |
2405 | } |
2406 | ||
2407 | elf_elfheader (obfd)->e_flags = in_flags; | |
b34976b6 | 2408 | elf_flags_init (obfd) = TRUE; |
252b5132 | 2409 | |
b34976b6 | 2410 | return TRUE; |
252b5132 RH |
2411 | } |
2412 | ||
2413 | /* Merge backend specific data from an object file to the output | |
2414 | object file when linking. */ | |
9b485d32 | 2415 | |
b34976b6 | 2416 | static bfd_boolean |
252b5132 | 2417 | elf32_arm_merge_private_bfd_data (ibfd, obfd) |
fc830a83 NC |
2418 | bfd * ibfd; |
2419 | bfd * obfd; | |
252b5132 RH |
2420 | { |
2421 | flagword out_flags; | |
2422 | flagword in_flags; | |
b34976b6 | 2423 | bfd_boolean flags_compatible = TRUE; |
cf919dfd | 2424 | asection *sec; |
252b5132 | 2425 | |
9b485d32 | 2426 | /* Check if we have the same endianess. */ |
82e51918 | 2427 | if (! _bfd_generic_verify_endian_match (ibfd, obfd)) |
b34976b6 | 2428 | return FALSE; |
1fe494a5 | 2429 | |
252b5132 RH |
2430 | if ( bfd_get_flavour (ibfd) != bfd_target_elf_flavour |
2431 | || bfd_get_flavour (obfd) != bfd_target_elf_flavour) | |
b34976b6 | 2432 | return TRUE; |
252b5132 | 2433 | |
252b5132 RH |
2434 | /* The input BFD must have had its flags initialised. */ |
2435 | /* The following seems bogus to me -- The flags are initialized in | |
2436 | the assembler but I don't think an elf_flags_init field is | |
9b485d32 | 2437 | written into the object. */ |
252b5132 RH |
2438 | /* BFD_ASSERT (elf_flags_init (ibfd)); */ |
2439 | ||
2440 | in_flags = elf_elfheader (ibfd)->e_flags; | |
2441 | out_flags = elf_elfheader (obfd)->e_flags; | |
2442 | ||
2443 | if (!elf_flags_init (obfd)) | |
2444 | { | |
fe077fa6 NC |
2445 | /* If the input is the default architecture and had the default |
2446 | flags then do not bother setting the flags for the output | |
2447 | architecture, instead allow future merges to do this. If no | |
2448 | future merges ever set these flags then they will retain their | |
2449 | uninitialised values, which surprise surprise, correspond | |
252b5132 | 2450 | to the default values. */ |
fe077fa6 NC |
2451 | if (bfd_get_arch_info (ibfd)->the_default |
2452 | && elf_elfheader (ibfd)->e_flags == 0) | |
b34976b6 | 2453 | return TRUE; |
252b5132 | 2454 | |
b34976b6 | 2455 | elf_flags_init (obfd) = TRUE; |
252b5132 RH |
2456 | elf_elfheader (obfd)->e_flags = in_flags; |
2457 | ||
2458 | if (bfd_get_arch (obfd) == bfd_get_arch (ibfd) | |
2459 | && bfd_get_arch_info (obfd)->the_default) | |
2460 | return bfd_set_arch_mach (obfd, bfd_get_arch (ibfd), bfd_get_mach (ibfd)); | |
2461 | ||
b34976b6 | 2462 | return TRUE; |
252b5132 RH |
2463 | } |
2464 | ||
5a6c6817 NC |
2465 | /* Determine what should happen if the input ARM architecture |
2466 | does not match the output ARM architecture. */ | |
2467 | if (! bfd_arm_merge_machines (ibfd, obfd)) | |
2468 | return FALSE; | |
e16bb312 | 2469 | |
1006ba19 | 2470 | /* Identical flags must be compatible. */ |
252b5132 | 2471 | if (in_flags == out_flags) |
b34976b6 | 2472 | return TRUE; |
252b5132 | 2473 | |
35a0f415 DJ |
2474 | /* Check to see if the input BFD actually contains any sections. If |
2475 | not, its flags may not have been initialised either, but it | |
2476 | cannot actually cause any incompatibility. Do not short-circuit | |
2477 | dynamic objects; their section list may be emptied by | |
d1f161ea | 2478 | elf_link_add_object_symbols. |
35a0f415 | 2479 | |
d1f161ea NC |
2480 | Also check to see if there are no code sections in the input. |
2481 | In this case there is no need to check for code specific flags. | |
2482 | XXX - do we need to worry about floating-point format compatability | |
2483 | in data sections ? */ | |
35a0f415 | 2484 | if (!(ibfd->flags & DYNAMIC)) |
cf919dfd | 2485 | { |
35a0f415 | 2486 | bfd_boolean null_input_bfd = TRUE; |
d1f161ea | 2487 | bfd_boolean only_data_sections = TRUE; |
35a0f415 DJ |
2488 | |
2489 | for (sec = ibfd->sections; sec != NULL; sec = sec->next) | |
cf919dfd | 2490 | { |
35a0f415 DJ |
2491 | /* Ignore synthetic glue sections. */ |
2492 | if (strcmp (sec->name, ".glue_7") | |
2493 | && strcmp (sec->name, ".glue_7t")) | |
2494 | { | |
d1f161ea NC |
2495 | if ((bfd_get_section_flags (ibfd, sec) |
2496 | & (SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS)) | |
2497 | == (SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS)) | |
2498 | only_data_sections = FALSE; | |
2499 | ||
35a0f415 DJ |
2500 | null_input_bfd = FALSE; |
2501 | break; | |
2502 | } | |
cf919dfd | 2503 | } |
d1f161ea NC |
2504 | |
2505 | if (null_input_bfd || only_data_sections) | |
35a0f415 | 2506 | return TRUE; |
cf919dfd | 2507 | } |
cf919dfd | 2508 | |
252b5132 | 2509 | /* Complain about various flag mismatches. */ |
fc830a83 NC |
2510 | if (EF_ARM_EABI_VERSION (in_flags) != EF_ARM_EABI_VERSION (out_flags)) |
2511 | { | |
63b0f745 | 2512 | _bfd_error_handler (_("\ |
6c571f00 | 2513 | ERROR: %s is compiled for EABI version %d, whereas %s is compiled for version %d"), |
63b0f745 NC |
2514 | bfd_archive_filename (ibfd), |
2515 | (in_flags & EF_ARM_EABIMASK) >> 24, | |
06317a27 | 2516 | bfd_get_filename (obfd), |
63b0f745 | 2517 | (out_flags & EF_ARM_EABIMASK) >> 24); |
b34976b6 | 2518 | return FALSE; |
fc830a83 | 2519 | } |
252b5132 | 2520 | |
1006ba19 PB |
2521 | /* Not sure what needs to be checked for EABI versions >= 1. */ |
2522 | if (EF_ARM_EABI_VERSION (in_flags) == EF_ARM_EABI_UNKNOWN) | |
2523 | { | |
fd2ec330 | 2524 | if ((in_flags & EF_ARM_APCS_26) != (out_flags & EF_ARM_APCS_26)) |
1006ba19 | 2525 | { |
63b0f745 | 2526 | _bfd_error_handler (_("\ |
6c571f00 | 2527 | ERROR: %s is compiled for APCS-%d, whereas target %s uses APCS-%d"), |
63b0f745 NC |
2528 | bfd_archive_filename (ibfd), |
2529 | in_flags & EF_ARM_APCS_26 ? 26 : 32, | |
06317a27 | 2530 | bfd_get_filename (obfd), |
63b0f745 | 2531 | out_flags & EF_ARM_APCS_26 ? 26 : 32); |
b34976b6 | 2532 | flags_compatible = FALSE; |
1006ba19 | 2533 | } |
252b5132 | 2534 | |
fd2ec330 | 2535 | if ((in_flags & EF_ARM_APCS_FLOAT) != (out_flags & EF_ARM_APCS_FLOAT)) |
1006ba19 | 2536 | { |
5eefb65f NC |
2537 | if (in_flags & EF_ARM_APCS_FLOAT) |
2538 | _bfd_error_handler (_("\ | |
6c571f00 | 2539 | ERROR: %s passes floats in float registers, whereas %s passes them in integer registers"), |
5eefb65f NC |
2540 | bfd_archive_filename (ibfd), |
2541 | bfd_get_filename (obfd)); | |
2542 | else | |
2543 | _bfd_error_handler (_("\ | |
6c571f00 | 2544 | ERROR: %s passes floats in integer registers, whereas %s passes them in float registers"), |
5eefb65f NC |
2545 | bfd_archive_filename (ibfd), |
2546 | bfd_get_filename (obfd)); | |
63b0f745 | 2547 | |
b34976b6 | 2548 | flags_compatible = FALSE; |
1006ba19 | 2549 | } |
252b5132 | 2550 | |
96a846ea | 2551 | if ((in_flags & EF_ARM_VFP_FLOAT) != (out_flags & EF_ARM_VFP_FLOAT)) |
1006ba19 | 2552 | { |
96a846ea RE |
2553 | if (in_flags & EF_ARM_VFP_FLOAT) |
2554 | _bfd_error_handler (_("\ | |
fde78edd | 2555 | ERROR: %s uses VFP instructions, whereas %s does not"), |
5eefb65f NC |
2556 | bfd_archive_filename (ibfd), |
2557 | bfd_get_filename (obfd)); | |
2558 | else | |
96a846ea | 2559 | _bfd_error_handler (_("\ |
fde78edd NC |
2560 | ERROR: %s uses FPA instructions, whereas %s does not"), |
2561 | bfd_archive_filename (ibfd), | |
2562 | bfd_get_filename (obfd)); | |
2563 | ||
2564 | flags_compatible = FALSE; | |
2565 | } | |
2566 | ||
2567 | if ((in_flags & EF_ARM_MAVERICK_FLOAT) != (out_flags & EF_ARM_MAVERICK_FLOAT)) | |
2568 | { | |
2569 | if (in_flags & EF_ARM_MAVERICK_FLOAT) | |
2570 | _bfd_error_handler (_("\ | |
2571 | ERROR: %s uses Maverick instructions, whereas %s does not"), | |
2572 | bfd_archive_filename (ibfd), | |
2573 | bfd_get_filename (obfd)); | |
2574 | else | |
2575 | _bfd_error_handler (_("\ | |
5a21e886 | 2576 | ERROR: %s does not use Maverick instructions, whereas %s does"), |
5eefb65f NC |
2577 | bfd_archive_filename (ibfd), |
2578 | bfd_get_filename (obfd)); | |
63b0f745 | 2579 | |
b34976b6 | 2580 | flags_compatible = FALSE; |
1006ba19 | 2581 | } |
96a846ea RE |
2582 | |
2583 | #ifdef EF_ARM_SOFT_FLOAT | |
2584 | if ((in_flags & EF_ARM_SOFT_FLOAT) != (out_flags & EF_ARM_SOFT_FLOAT)) | |
2585 | { | |
2586 | /* We can allow interworking between code that is VFP format | |
2587 | layout, and uses either soft float or integer regs for | |
2588 | passing floating point arguments and results. We already | |
2589 | know that the APCS_FLOAT flags match; similarly for VFP | |
2590 | flags. */ | |
2591 | if ((in_flags & EF_ARM_APCS_FLOAT) != 0 | |
2592 | || (in_flags & EF_ARM_VFP_FLOAT) == 0) | |
2593 | { | |
2594 | if (in_flags & EF_ARM_SOFT_FLOAT) | |
517662d4 | 2595 | _bfd_error_handler (_("\ |
6c571f00 | 2596 | ERROR: %s uses software FP, whereas %s uses hardware FP"), |
96a846ea RE |
2597 | bfd_archive_filename (ibfd), |
2598 | bfd_get_filename (obfd)); | |
2599 | else | |
517662d4 | 2600 | _bfd_error_handler (_("\ |
6c571f00 | 2601 | ERROR: %s uses hardware FP, whereas %s uses software FP"), |
96a846ea RE |
2602 | bfd_archive_filename (ibfd), |
2603 | bfd_get_filename (obfd)); | |
2604 | ||
b34976b6 | 2605 | flags_compatible = FALSE; |
96a846ea RE |
2606 | } |
2607 | } | |
ee43f35e | 2608 | #endif |
252b5132 | 2609 | |
1006ba19 | 2610 | /* Interworking mismatch is only a warning. */ |
fd2ec330 | 2611 | if ((in_flags & EF_ARM_INTERWORK) != (out_flags & EF_ARM_INTERWORK)) |
8f615d07 | 2612 | { |
e3c8793a NC |
2613 | if (in_flags & EF_ARM_INTERWORK) |
2614 | { | |
2615 | _bfd_error_handler (_("\ | |
2616 | Warning: %s supports interworking, whereas %s does not"), | |
2617 | bfd_archive_filename (ibfd), | |
cedb70c5 | 2618 | bfd_get_filename (obfd)); |
e3c8793a NC |
2619 | } |
2620 | else | |
2621 | { | |
2622 | _bfd_error_handler (_("\ | |
2623 | Warning: %s does not support interworking, whereas %s does"), | |
2624 | bfd_archive_filename (ibfd), | |
2625 | bfd_get_filename (obfd)); | |
2626 | } | |
8f615d07 | 2627 | } |
252b5132 | 2628 | } |
63b0f745 | 2629 | |
1006ba19 | 2630 | return flags_compatible; |
252b5132 RH |
2631 | } |
2632 | ||
9b485d32 NC |
2633 | /* Display the flags field. */ |
2634 | ||
b34976b6 | 2635 | static bfd_boolean |
252b5132 RH |
2636 | elf32_arm_print_private_bfd_data (abfd, ptr) |
2637 | bfd *abfd; | |
2638 | PTR ptr; | |
2639 | { | |
fc830a83 NC |
2640 | FILE * file = (FILE *) ptr; |
2641 | unsigned long flags; | |
252b5132 RH |
2642 | |
2643 | BFD_ASSERT (abfd != NULL && ptr != NULL); | |
2644 | ||
2645 | /* Print normal ELF private data. */ | |
2646 | _bfd_elf_print_private_bfd_data (abfd, ptr); | |
2647 | ||
fc830a83 | 2648 | flags = elf_elfheader (abfd)->e_flags; |
9b485d32 NC |
2649 | /* Ignore init flag - it may not be set, despite the flags field |
2650 | containing valid data. */ | |
252b5132 RH |
2651 | |
2652 | /* xgettext:c-format */ | |
9b485d32 | 2653 | fprintf (file, _("private flags = %lx:"), elf_elfheader (abfd)->e_flags); |
252b5132 | 2654 | |
fc830a83 NC |
2655 | switch (EF_ARM_EABI_VERSION (flags)) |
2656 | { | |
2657 | case EF_ARM_EABI_UNKNOWN: | |
4cc11e76 | 2658 | /* The following flag bits are GNU extensions and not part of the |
fc830a83 NC |
2659 | official ARM ELF extended ABI. Hence they are only decoded if |
2660 | the EABI version is not set. */ | |
fd2ec330 | 2661 | if (flags & EF_ARM_INTERWORK) |
9b485d32 | 2662 | fprintf (file, _(" [interworking enabled]")); |
9a5aca8c | 2663 | |
fd2ec330 | 2664 | if (flags & EF_ARM_APCS_26) |
6c571f00 | 2665 | fprintf (file, " [APCS-26]"); |
fc830a83 | 2666 | else |
6c571f00 | 2667 | fprintf (file, " [APCS-32]"); |
9a5aca8c | 2668 | |
96a846ea RE |
2669 | if (flags & EF_ARM_VFP_FLOAT) |
2670 | fprintf (file, _(" [VFP float format]")); | |
fde78edd NC |
2671 | else if (flags & EF_ARM_MAVERICK_FLOAT) |
2672 | fprintf (file, _(" [Maverick float format]")); | |
96a846ea RE |
2673 | else |
2674 | fprintf (file, _(" [FPA float format]")); | |
2675 | ||
fd2ec330 | 2676 | if (flags & EF_ARM_APCS_FLOAT) |
9b485d32 | 2677 | fprintf (file, _(" [floats passed in float registers]")); |
9a5aca8c | 2678 | |
fd2ec330 | 2679 | if (flags & EF_ARM_PIC) |
9b485d32 | 2680 | fprintf (file, _(" [position independent]")); |
fc830a83 | 2681 | |
fd2ec330 | 2682 | if (flags & EF_ARM_NEW_ABI) |
9b485d32 | 2683 | fprintf (file, _(" [new ABI]")); |
9a5aca8c | 2684 | |
fd2ec330 | 2685 | if (flags & EF_ARM_OLD_ABI) |
9b485d32 | 2686 | fprintf (file, _(" [old ABI]")); |
9a5aca8c | 2687 | |
fd2ec330 | 2688 | if (flags & EF_ARM_SOFT_FLOAT) |
9b485d32 | 2689 | fprintf (file, _(" [software FP]")); |
9a5aca8c | 2690 | |
96a846ea RE |
2691 | flags &= ~(EF_ARM_INTERWORK | EF_ARM_APCS_26 | EF_ARM_APCS_FLOAT |
2692 | | EF_ARM_PIC | EF_ARM_NEW_ABI | EF_ARM_OLD_ABI | |
fde78edd NC |
2693 | | EF_ARM_SOFT_FLOAT | EF_ARM_VFP_FLOAT |
2694 | | EF_ARM_MAVERICK_FLOAT); | |
fc830a83 | 2695 | break; |
9a5aca8c | 2696 | |
fc830a83 | 2697 | case EF_ARM_EABI_VER1: |
9b485d32 | 2698 | fprintf (file, _(" [Version1 EABI]")); |
9a5aca8c | 2699 | |
fc830a83 | 2700 | if (flags & EF_ARM_SYMSARESORTED) |
9b485d32 | 2701 | fprintf (file, _(" [sorted symbol table]")); |
fc830a83 | 2702 | else |
9b485d32 | 2703 | fprintf (file, _(" [unsorted symbol table]")); |
9a5aca8c | 2704 | |
fc830a83 NC |
2705 | flags &= ~ EF_ARM_SYMSARESORTED; |
2706 | break; | |
9a5aca8c | 2707 | |
fd2ec330 PB |
2708 | case EF_ARM_EABI_VER2: |
2709 | fprintf (file, _(" [Version2 EABI]")); | |
2710 | ||
2711 | if (flags & EF_ARM_SYMSARESORTED) | |
2712 | fprintf (file, _(" [sorted symbol table]")); | |
2713 | else | |
2714 | fprintf (file, _(" [unsorted symbol table]")); | |
2715 | ||
2716 | if (flags & EF_ARM_DYNSYMSUSESEGIDX) | |
2717 | fprintf (file, _(" [dynamic symbols use segment index]")); | |
2718 | ||
2719 | if (flags & EF_ARM_MAPSYMSFIRST) | |
2720 | fprintf (file, _(" [mapping symbols precede others]")); | |
2721 | ||
99e4ae17 | 2722 | flags &= ~(EF_ARM_SYMSARESORTED | EF_ARM_DYNSYMSUSESEGIDX |
fd2ec330 PB |
2723 | | EF_ARM_MAPSYMSFIRST); |
2724 | break; | |
2725 | ||
d507cf36 PB |
2726 | case EF_ARM_EABI_VER3: |
2727 | fprintf (file, _(" [Version3 EABI]")); | |
2728 | ||
2729 | if (flags & EF_ARM_BE8) | |
2730 | fprintf (file, _(" [BE8]")); | |
2731 | ||
2732 | if (flags & EF_ARM_LE8) | |
2733 | fprintf (file, _(" [LE8]")); | |
2734 | ||
2735 | flags &= ~(EF_ARM_LE8 | EF_ARM_BE8); | |
2736 | break; | |
2737 | ||
fc830a83 | 2738 | default: |
9b485d32 | 2739 | fprintf (file, _(" <EABI version unrecognised>")); |
fc830a83 NC |
2740 | break; |
2741 | } | |
252b5132 | 2742 | |
fc830a83 | 2743 | flags &= ~ EF_ARM_EABIMASK; |
252b5132 | 2744 | |
fc830a83 | 2745 | if (flags & EF_ARM_RELEXEC) |
9b485d32 | 2746 | fprintf (file, _(" [relocatable executable]")); |
252b5132 | 2747 | |
fc830a83 | 2748 | if (flags & EF_ARM_HASENTRY) |
9b485d32 | 2749 | fprintf (file, _(" [has entry point]")); |
252b5132 | 2750 | |
fc830a83 NC |
2751 | flags &= ~ (EF_ARM_RELEXEC | EF_ARM_HASENTRY); |
2752 | ||
2753 | if (flags) | |
9b485d32 | 2754 | fprintf (file, _("<Unrecognised flag bits set>")); |
9a5aca8c | 2755 | |
252b5132 RH |
2756 | fputc ('\n', file); |
2757 | ||
b34976b6 | 2758 | return TRUE; |
252b5132 RH |
2759 | } |
2760 | ||
2761 | static int | |
2762 | elf32_arm_get_symbol_type (elf_sym, type) | |
2763 | Elf_Internal_Sym * elf_sym; | |
2764 | int type; | |
2765 | { | |
2f0ca46a NC |
2766 | switch (ELF_ST_TYPE (elf_sym->st_info)) |
2767 | { | |
2768 | case STT_ARM_TFUNC: | |
2769 | return ELF_ST_TYPE (elf_sym->st_info); | |
ce855c42 | 2770 | |
2f0ca46a NC |
2771 | case STT_ARM_16BIT: |
2772 | /* If the symbol is not an object, return the STT_ARM_16BIT flag. | |
2773 | This allows us to distinguish between data used by Thumb instructions | |
2774 | and non-data (which is probably code) inside Thumb regions of an | |
2775 | executable. */ | |
2776 | if (type != STT_OBJECT) | |
2777 | return ELF_ST_TYPE (elf_sym->st_info); | |
2778 | break; | |
9a5aca8c | 2779 | |
ce855c42 NC |
2780 | default: |
2781 | break; | |
2f0ca46a NC |
2782 | } |
2783 | ||
2784 | return type; | |
252b5132 | 2785 | } |
f21f3fe0 | 2786 | |
252b5132 | 2787 | static asection * |
1e2f5b6e AM |
2788 | elf32_arm_gc_mark_hook (sec, info, rel, h, sym) |
2789 | asection *sec; | |
5f771d47 | 2790 | struct bfd_link_info *info ATTRIBUTE_UNUSED; |
252b5132 RH |
2791 | Elf_Internal_Rela *rel; |
2792 | struct elf_link_hash_entry *h; | |
2793 | Elf_Internal_Sym *sym; | |
2794 | { | |
2795 | if (h != NULL) | |
2796 | { | |
2797 | switch (ELF32_R_TYPE (rel->r_info)) | |
2798 | { | |
2799 | case R_ARM_GNU_VTINHERIT: | |
2800 | case R_ARM_GNU_VTENTRY: | |
2801 | break; | |
2802 | ||
2803 | default: | |
2804 | switch (h->root.type) | |
2805 | { | |
2806 | case bfd_link_hash_defined: | |
2807 | case bfd_link_hash_defweak: | |
2808 | return h->root.u.def.section; | |
2809 | ||
2810 | case bfd_link_hash_common: | |
2811 | return h->root.u.c.p->section; | |
e049a0de ILT |
2812 | |
2813 | default: | |
2814 | break; | |
252b5132 RH |
2815 | } |
2816 | } | |
2817 | } | |
2818 | else | |
1e2f5b6e | 2819 | return bfd_section_from_elf_index (sec->owner, sym->st_shndx); |
9ad5cbcf | 2820 | |
252b5132 RH |
2821 | return NULL; |
2822 | } | |
2823 | ||
780a67af NC |
2824 | /* Update the got entry reference counts for the section being removed. */ |
2825 | ||
b34976b6 | 2826 | static bfd_boolean |
252b5132 | 2827 | elf32_arm_gc_sweep_hook (abfd, info, sec, relocs) |
5f771d47 ILT |
2828 | bfd *abfd ATTRIBUTE_UNUSED; |
2829 | struct bfd_link_info *info ATTRIBUTE_UNUSED; | |
2830 | asection *sec ATTRIBUTE_UNUSED; | |
2831 | const Elf_Internal_Rela *relocs ATTRIBUTE_UNUSED; | |
252b5132 | 2832 | { |
5e681ec4 PB |
2833 | Elf_Internal_Shdr *symtab_hdr; |
2834 | struct elf_link_hash_entry **sym_hashes; | |
2835 | bfd_signed_vma *local_got_refcounts; | |
2836 | const Elf_Internal_Rela *rel, *relend; | |
2837 | unsigned long r_symndx; | |
2838 | struct elf_link_hash_entry *h; | |
2839 | ||
2840 | elf_section_data (sec)->local_dynrel = NULL; | |
2841 | ||
2842 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
2843 | sym_hashes = elf_sym_hashes (abfd); | |
2844 | local_got_refcounts = elf_local_got_refcounts (abfd); | |
2845 | ||
2846 | relend = relocs + sec->reloc_count; | |
2847 | for (rel = relocs; rel < relend; rel++) | |
2848 | switch (ELF32_R_TYPE (rel->r_info)) | |
2849 | { | |
2850 | case R_ARM_GOT32: | |
2851 | r_symndx = ELF32_R_SYM (rel->r_info); | |
2852 | if (r_symndx >= symtab_hdr->sh_info) | |
2853 | { | |
2854 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
2855 | if (h->got.refcount > 0) | |
2856 | h->got.refcount -= 1; | |
2857 | } | |
2858 | else if (local_got_refcounts != NULL) | |
2859 | { | |
2860 | if (local_got_refcounts[r_symndx] > 0) | |
2861 | local_got_refcounts[r_symndx] -= 1; | |
2862 | } | |
2863 | break; | |
2864 | ||
2865 | case R_ARM_ABS32: | |
2866 | case R_ARM_REL32: | |
2867 | case R_ARM_PC24: | |
7359ea65 | 2868 | case R_ARM_PLT32: |
5e681ec4 PB |
2869 | r_symndx = ELF32_R_SYM (rel->r_info); |
2870 | if (r_symndx >= symtab_hdr->sh_info) | |
2871 | { | |
2872 | struct elf32_arm_link_hash_entry *eh; | |
2873 | struct elf32_arm_relocs_copied **pp; | |
2874 | struct elf32_arm_relocs_copied *p; | |
2875 | ||
2876 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
2877 | ||
7359ea65 | 2878 | if (h->plt.refcount > 0) |
5e681ec4 PB |
2879 | h->plt.refcount -= 1; |
2880 | ||
7359ea65 DJ |
2881 | if (ELF32_R_TYPE (rel->r_info) == R_ARM_ABS32 |
2882 | || ELF32_R_TYPE (rel->r_info) == R_ARM_REL32) | |
2883 | { | |
2884 | eh = (struct elf32_arm_link_hash_entry *) h; | |
5e681ec4 | 2885 | |
7359ea65 DJ |
2886 | for (pp = &eh->relocs_copied; (p = *pp) != NULL; |
2887 | pp = &p->next) | |
2888 | if (p->section == sec) | |
2889 | { | |
2890 | p->count -= 1; | |
2891 | if (p->count == 0) | |
2892 | *pp = p->next; | |
2893 | break; | |
2894 | } | |
2895 | } | |
5e681ec4 PB |
2896 | } |
2897 | break; | |
2898 | ||
2899 | default: | |
2900 | break; | |
2901 | } | |
2902 | ||
b34976b6 | 2903 | return TRUE; |
252b5132 RH |
2904 | } |
2905 | ||
780a67af NC |
2906 | /* Look through the relocs for a section during the first phase. */ |
2907 | ||
b34976b6 | 2908 | static bfd_boolean |
252b5132 | 2909 | elf32_arm_check_relocs (abfd, info, sec, relocs) |
b34976b6 AM |
2910 | bfd *abfd; |
2911 | struct bfd_link_info *info; | |
2912 | asection *sec; | |
2913 | const Elf_Internal_Rela *relocs; | |
252b5132 | 2914 | { |
b34976b6 AM |
2915 | Elf_Internal_Shdr *symtab_hdr; |
2916 | struct elf_link_hash_entry **sym_hashes; | |
2917 | struct elf_link_hash_entry **sym_hashes_end; | |
2918 | const Elf_Internal_Rela *rel; | |
2919 | const Elf_Internal_Rela *rel_end; | |
2920 | bfd *dynobj; | |
5e681ec4 | 2921 | asection *sreloc; |
b34976b6 | 2922 | bfd_vma *local_got_offsets; |
5e681ec4 | 2923 | struct elf32_arm_link_hash_table *htab; |
9a5aca8c | 2924 | |
1049f94e | 2925 | if (info->relocatable) |
b34976b6 | 2926 | return TRUE; |
9a5aca8c | 2927 | |
5e681ec4 PB |
2928 | htab = elf32_arm_hash_table (info); |
2929 | sreloc = NULL; | |
9a5aca8c | 2930 | |
252b5132 RH |
2931 | dynobj = elf_hash_table (info)->dynobj; |
2932 | local_got_offsets = elf_local_got_offsets (abfd); | |
f21f3fe0 | 2933 | |
252b5132 RH |
2934 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
2935 | sym_hashes = elf_sym_hashes (abfd); | |
9b485d32 NC |
2936 | sym_hashes_end = sym_hashes |
2937 | + symtab_hdr->sh_size / sizeof (Elf32_External_Sym); | |
2938 | ||
252b5132 RH |
2939 | if (!elf_bad_symtab (abfd)) |
2940 | sym_hashes_end -= symtab_hdr->sh_info; | |
9b485d32 | 2941 | |
252b5132 RH |
2942 | rel_end = relocs + sec->reloc_count; |
2943 | for (rel = relocs; rel < rel_end; rel++) | |
2944 | { | |
2945 | struct elf_link_hash_entry *h; | |
2946 | unsigned long r_symndx; | |
9a5aca8c | 2947 | |
252b5132 RH |
2948 | r_symndx = ELF32_R_SYM (rel->r_info); |
2949 | if (r_symndx < symtab_hdr->sh_info) | |
2950 | h = NULL; | |
2951 | else | |
2952 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
9a5aca8c | 2953 | |
252b5132 RH |
2954 | switch (ELF32_R_TYPE (rel->r_info)) |
2955 | { | |
5e681ec4 PB |
2956 | case R_ARM_GOT32: |
2957 | /* This symbol requires a global offset table entry. */ | |
252b5132 RH |
2958 | if (h != NULL) |
2959 | { | |
5e681ec4 | 2960 | h->got.refcount++; |
252b5132 RH |
2961 | } |
2962 | else | |
2963 | { | |
5e681ec4 PB |
2964 | bfd_signed_vma *local_got_refcounts; |
2965 | ||
2966 | /* This is a global offset table entry for a local symbol. */ | |
2967 | local_got_refcounts = elf_local_got_refcounts (abfd); | |
2968 | if (local_got_refcounts == NULL) | |
252b5132 | 2969 | { |
dc810e39 | 2970 | bfd_size_type size; |
252b5132 | 2971 | |
dc810e39 | 2972 | size = symtab_hdr->sh_info; |
5e681ec4 PB |
2973 | size *= (sizeof (bfd_signed_vma) + sizeof(char)); |
2974 | local_got_refcounts = ((bfd_signed_vma *) | |
2975 | bfd_zalloc (abfd, size)); | |
2976 | if (local_got_refcounts == NULL) | |
b34976b6 | 2977 | return FALSE; |
5e681ec4 | 2978 | elf_local_got_refcounts (abfd) = local_got_refcounts; |
252b5132 | 2979 | } |
5e681ec4 | 2980 | local_got_refcounts[r_symndx] += 1; |
252b5132 | 2981 | } |
252b5132 RH |
2982 | break; |
2983 | ||
5e681ec4 PB |
2984 | case R_ARM_GOTOFF: |
2985 | case R_ARM_GOTPC: | |
2986 | if (htab->sgot == NULL) | |
2987 | { | |
2988 | if (htab->root.dynobj == NULL) | |
2989 | htab->root.dynobj = abfd; | |
2990 | if (!create_got_section (htab->root.dynobj, info)) | |
2991 | return FALSE; | |
2992 | } | |
252b5132 RH |
2993 | break; |
2994 | ||
2995 | case R_ARM_ABS32: | |
2996 | case R_ARM_REL32: | |
2997 | case R_ARM_PC24: | |
7359ea65 DJ |
2998 | case R_ARM_PLT32: |
2999 | if (h != NULL) | |
5e681ec4 PB |
3000 | { |
3001 | /* If this reloc is in a read-only section, we might | |
3002 | need a copy reloc. We can't check reliably at this | |
3003 | stage whether the section is read-only, as input | |
3004 | sections have not yet been mapped to output sections. | |
3005 | Tentatively set the flag for now, and correct in | |
3006 | adjust_dynamic_symbol. */ | |
7359ea65 DJ |
3007 | if (!info->shared) |
3008 | h->elf_link_hash_flags |= ELF_LINK_NON_GOT_REF; | |
3009 | ||
5e681ec4 | 3010 | /* We may need a .plt entry if the function this reloc |
c84cd8ee DJ |
3011 | refers to is in a different object. We can't tell for |
3012 | sure yet, because something later might force the | |
3013 | symbol local. */ | |
7359ea65 DJ |
3014 | if (ELF32_R_TYPE (rel->r_info) == R_ARM_PC24 |
3015 | || ELF32_R_TYPE (rel->r_info) == R_ARM_PLT32) | |
4f199be3 DJ |
3016 | h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT; |
3017 | ||
3018 | /* If we create a PLT entry, this relocation will reference | |
3019 | it, even if it's an ABS32 relocation. */ | |
3020 | h->plt.refcount += 1; | |
5e681ec4 PB |
3021 | } |
3022 | ||
252b5132 RH |
3023 | /* If we are creating a shared library, and this is a reloc |
3024 | against a global symbol, or a non PC relative reloc | |
3025 | against a local symbol, then we need to copy the reloc | |
3026 | into the shared library. However, if we are linking with | |
3027 | -Bsymbolic, we do not need to copy a reloc against a | |
3028 | global symbol which is defined in an object we are | |
3029 | including in the link (i.e., DEF_REGULAR is set). At | |
3030 | this point we have not seen all the input files, so it is | |
3031 | possible that DEF_REGULAR is not set now but will be set | |
3032 | later (it is never cleared). We account for that | |
3033 | possibility below by storing information in the | |
5e681ec4 | 3034 | relocs_copied field of the hash table entry. */ |
252b5132 | 3035 | if (info->shared |
5e681ec4 | 3036 | && (sec->flags & SEC_ALLOC) != 0 |
7359ea65 | 3037 | && ((ELF32_R_TYPE (rel->r_info) != R_ARM_PC24 |
955af222 PB |
3038 | && ELF32_R_TYPE (rel->r_info) != R_ARM_PLT32 |
3039 | && ELF32_R_TYPE (rel->r_info) != R_ARM_REL32) | |
5e681ec4 PB |
3040 | || (h != NULL |
3041 | && (! info->symbolic | |
3042 | || (h->elf_link_hash_flags | |
3043 | & ELF_LINK_HASH_DEF_REGULAR) == 0)))) | |
252b5132 | 3044 | { |
5e681ec4 PB |
3045 | struct elf32_arm_relocs_copied *p, **head; |
3046 | ||
252b5132 RH |
3047 | /* When creating a shared object, we must copy these |
3048 | reloc types into the output file. We create a reloc | |
3049 | section in dynobj and make room for this reloc. */ | |
3050 | if (sreloc == NULL) | |
3051 | { | |
3052 | const char * name; | |
3053 | ||
3054 | name = (bfd_elf_string_from_elf_section | |
3055 | (abfd, | |
3056 | elf_elfheader (abfd)->e_shstrndx, | |
3057 | elf_section_data (sec)->rel_hdr.sh_name)); | |
3058 | if (name == NULL) | |
b34976b6 | 3059 | return FALSE; |
252b5132 RH |
3060 | |
3061 | BFD_ASSERT (strncmp (name, ".rel", 4) == 0 | |
99e4ae17 | 3062 | && strcmp (bfd_get_section_name (abfd, sec), |
252b5132 RH |
3063 | name + 4) == 0); |
3064 | ||
3065 | sreloc = bfd_get_section_by_name (dynobj, name); | |
3066 | if (sreloc == NULL) | |
3067 | { | |
3068 | flagword flags; | |
3069 | ||
3070 | sreloc = bfd_make_section (dynobj, name); | |
3071 | flags = (SEC_HAS_CONTENTS | SEC_READONLY | |
3072 | | SEC_IN_MEMORY | SEC_LINKER_CREATED); | |
3073 | if ((sec->flags & SEC_ALLOC) != 0) | |
3074 | flags |= SEC_ALLOC | SEC_LOAD; | |
3075 | if (sreloc == NULL | |
3076 | || ! bfd_set_section_flags (dynobj, sreloc, flags) | |
3077 | || ! bfd_set_section_alignment (dynobj, sreloc, 2)) | |
b34976b6 | 3078 | return FALSE; |
252b5132 | 3079 | } |
5e681ec4 PB |
3080 | |
3081 | elf_section_data (sec)->sreloc = sreloc; | |
252b5132 RH |
3082 | } |
3083 | ||
5e681ec4 PB |
3084 | /* If this is a global symbol, we count the number of |
3085 | relocations we need for this symbol. */ | |
3086 | if (h != NULL) | |
252b5132 | 3087 | { |
5e681ec4 PB |
3088 | head = &((struct elf32_arm_link_hash_entry *) h)->relocs_copied; |
3089 | } | |
3090 | else | |
3091 | { | |
3092 | /* Track dynamic relocs needed for local syms too. | |
3093 | We really need local syms available to do this | |
3094 | easily. Oh well. */ | |
3095 | ||
3096 | asection *s; | |
3097 | s = bfd_section_from_r_symndx (abfd, &htab->sym_sec, | |
3098 | sec, r_symndx); | |
3099 | if (s == NULL) | |
3100 | return FALSE; | |
3101 | ||
3102 | head = ((struct elf32_arm_relocs_copied **) | |
3103 | &elf_section_data (s)->local_dynrel); | |
3104 | } | |
3105 | ||
3106 | p = *head; | |
3107 | if (p == NULL || p->section != sec) | |
3108 | { | |
3109 | bfd_size_type amt = sizeof *p; | |
3110 | p = bfd_alloc (htab->root.dynobj, amt); | |
252b5132 | 3111 | if (p == NULL) |
5e681ec4 PB |
3112 | return FALSE; |
3113 | p->next = *head; | |
3114 | *head = p; | |
3115 | p->section = sec; | |
3116 | p->count = 0; | |
252b5132 | 3117 | } |
5e681ec4 | 3118 | |
7359ea65 DJ |
3119 | if (ELF32_R_TYPE (rel->r_info) == R_ARM_ABS32 |
3120 | || ELF32_R_TYPE (rel->r_info) == R_ARM_REL32) | |
3121 | p->count += 1; | |
252b5132 RH |
3122 | } |
3123 | break; | |
3124 | ||
3125 | /* This relocation describes the C++ object vtable hierarchy. | |
3126 | Reconstruct it for later use during GC. */ | |
3127 | case R_ARM_GNU_VTINHERIT: | |
c152c796 | 3128 | if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) |
b34976b6 | 3129 | return FALSE; |
252b5132 | 3130 | break; |
9a5aca8c | 3131 | |
252b5132 RH |
3132 | /* This relocation describes which C++ vtable entries are actually |
3133 | used. Record for later use during GC. */ | |
3134 | case R_ARM_GNU_VTENTRY: | |
c152c796 | 3135 | if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_offset)) |
b34976b6 | 3136 | return FALSE; |
252b5132 RH |
3137 | break; |
3138 | } | |
3139 | } | |
f21f3fe0 | 3140 | |
b34976b6 | 3141 | return TRUE; |
252b5132 RH |
3142 | } |
3143 | ||
252b5132 RH |
3144 | /* Find the nearest line to a particular section and offset, for error |
3145 | reporting. This code is a duplicate of the code in elf.c, except | |
9b485d32 | 3146 | that it also accepts STT_ARM_TFUNC as a symbol that names a function. */ |
252b5132 | 3147 | |
b34976b6 | 3148 | static bfd_boolean |
252b5132 RH |
3149 | elf32_arm_find_nearest_line |
3150 | (abfd, section, symbols, offset, filename_ptr, functionname_ptr, line_ptr) | |
b34976b6 AM |
3151 | bfd *abfd; |
3152 | asection *section; | |
3153 | asymbol **symbols; | |
3154 | bfd_vma offset; | |
3155 | const char **filename_ptr; | |
3156 | const char **functionname_ptr; | |
3157 | unsigned int *line_ptr; | |
252b5132 | 3158 | { |
b34976b6 AM |
3159 | bfd_boolean found; |
3160 | const char *filename; | |
3161 | asymbol *func; | |
3162 | bfd_vma low_func; | |
3163 | asymbol **p; | |
252b5132 RH |
3164 | |
3165 | if (_bfd_dwarf2_find_nearest_line (abfd, section, symbols, offset, | |
f21f3fe0 | 3166 | filename_ptr, functionname_ptr, |
857ec808 NC |
3167 | line_ptr, 0, |
3168 | &elf_tdata (abfd)->dwarf2_find_line_info)) | |
b34976b6 | 3169 | return TRUE; |
252b5132 RH |
3170 | |
3171 | if (! _bfd_stab_section_find_nearest_line (abfd, symbols, section, offset, | |
3172 | &found, filename_ptr, | |
3173 | functionname_ptr, line_ptr, | |
3174 | &elf_tdata (abfd)->line_info)) | |
b34976b6 | 3175 | return FALSE; |
f21f3fe0 | 3176 | |
252b5132 | 3177 | if (found) |
b34976b6 | 3178 | return TRUE; |
252b5132 RH |
3179 | |
3180 | if (symbols == NULL) | |
b34976b6 | 3181 | return FALSE; |
252b5132 RH |
3182 | |
3183 | filename = NULL; | |
3184 | func = NULL; | |
3185 | low_func = 0; | |
3186 | ||
3187 | for (p = symbols; *p != NULL; p++) | |
3188 | { | |
3189 | elf_symbol_type *q; | |
3190 | ||
3191 | q = (elf_symbol_type *) *p; | |
3192 | ||
3193 | if (bfd_get_section (&q->symbol) != section) | |
3194 | continue; | |
3195 | ||
3196 | switch (ELF_ST_TYPE (q->internal_elf_sym.st_info)) | |
3197 | { | |
3198 | default: | |
3199 | break; | |
3200 | case STT_FILE: | |
3201 | filename = bfd_asymbol_name (&q->symbol); | |
3202 | break; | |
3203 | case STT_NOTYPE: | |
3204 | case STT_FUNC: | |
3205 | case STT_ARM_TFUNC: | |
3206 | if (q->symbol.section == section | |
3207 | && q->symbol.value >= low_func | |
3208 | && q->symbol.value <= offset) | |
3209 | { | |
3210 | func = (asymbol *) q; | |
3211 | low_func = q->symbol.value; | |
3212 | } | |
3213 | break; | |
3214 | } | |
3215 | } | |
3216 | ||
3217 | if (func == NULL) | |
b34976b6 | 3218 | return FALSE; |
252b5132 RH |
3219 | |
3220 | *filename_ptr = filename; | |
3221 | *functionname_ptr = bfd_asymbol_name (func); | |
3222 | *line_ptr = 0; | |
f21f3fe0 | 3223 | |
b34976b6 | 3224 | return TRUE; |
252b5132 RH |
3225 | } |
3226 | ||
3227 | /* Adjust a symbol defined by a dynamic object and referenced by a | |
3228 | regular object. The current definition is in some section of the | |
3229 | dynamic object, but we're not including those sections. We have to | |
3230 | change the definition to something the rest of the link can | |
3231 | understand. */ | |
3232 | ||
b34976b6 | 3233 | static bfd_boolean |
252b5132 RH |
3234 | elf32_arm_adjust_dynamic_symbol (info, h) |
3235 | struct bfd_link_info * info; | |
3236 | struct elf_link_hash_entry * h; | |
3237 | { | |
3238 | bfd * dynobj; | |
3239 | asection * s; | |
3240 | unsigned int power_of_two; | |
3241 | ||
3242 | dynobj = elf_hash_table (info)->dynobj; | |
3243 | ||
3244 | /* Make sure we know what is going on here. */ | |
3245 | BFD_ASSERT (dynobj != NULL | |
3246 | && ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) | |
3247 | || h->weakdef != NULL | |
3248 | || ((h->elf_link_hash_flags | |
3249 | & ELF_LINK_HASH_DEF_DYNAMIC) != 0 | |
3250 | && (h->elf_link_hash_flags | |
3251 | & ELF_LINK_HASH_REF_REGULAR) != 0 | |
3252 | && (h->elf_link_hash_flags | |
3253 | & ELF_LINK_HASH_DEF_REGULAR) == 0))); | |
3254 | ||
3255 | /* If this is a function, put it in the procedure linkage table. We | |
3256 | will fill in the contents of the procedure linkage table later, | |
3257 | when we know the address of the .got section. */ | |
24a1ba0f | 3258 | if (h->type == STT_FUNC |
252b5132 RH |
3259 | || (h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0) |
3260 | { | |
5e681ec4 PB |
3261 | if (h->plt.refcount <= 0 |
3262 | || SYMBOL_CALLS_LOCAL (info, h) | |
3263 | || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT | |
3264 | && h->root.type == bfd_link_hash_undefweak)) | |
252b5132 RH |
3265 | { |
3266 | /* This case can occur if we saw a PLT32 reloc in an input | |
5e681ec4 PB |
3267 | file, but the symbol was never referred to by a dynamic |
3268 | object, or if all references were garbage collected. In | |
3269 | such a case, we don't actually need to build a procedure | |
3270 | linkage table, and we can just do a PC24 reloc instead. */ | |
3271 | h->plt.offset = (bfd_vma) -1; | |
9d7404b7 | 3272 | h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT; |
252b5132 RH |
3273 | } |
3274 | ||
b34976b6 | 3275 | return TRUE; |
252b5132 | 3276 | } |
5e681ec4 PB |
3277 | else |
3278 | /* It's possible that we incorrectly decided a .plt reloc was | |
3279 | needed for an R_ARM_PC24 reloc to a non-function sym in | |
3280 | check_relocs. We can't decide accurately between function and | |
3281 | non-function syms in check-relocs; Objects loaded later in | |
3282 | the link may change h->type. So fix it now. */ | |
3283 | h->plt.offset = (bfd_vma) -1; | |
252b5132 RH |
3284 | |
3285 | /* If this is a weak symbol, and there is a real definition, the | |
3286 | processor independent code will have arranged for us to see the | |
3287 | real definition first, and we can just use the same value. */ | |
3288 | if (h->weakdef != NULL) | |
3289 | { | |
3290 | BFD_ASSERT (h->weakdef->root.type == bfd_link_hash_defined | |
3291 | || h->weakdef->root.type == bfd_link_hash_defweak); | |
3292 | h->root.u.def.section = h->weakdef->root.u.def.section; | |
3293 | h->root.u.def.value = h->weakdef->root.u.def.value; | |
b34976b6 | 3294 | return TRUE; |
252b5132 RH |
3295 | } |
3296 | ||
3297 | /* This is a reference to a symbol defined by a dynamic object which | |
3298 | is not a function. */ | |
3299 | ||
3300 | /* If we are creating a shared library, we must presume that the | |
3301 | only references to the symbol are via the global offset table. | |
3302 | For such cases we need not do anything here; the relocations will | |
3303 | be handled correctly by relocate_section. */ | |
3304 | if (info->shared) | |
b34976b6 | 3305 | return TRUE; |
252b5132 RH |
3306 | |
3307 | /* We must allocate the symbol in our .dynbss section, which will | |
3308 | become part of the .bss section of the executable. There will be | |
3309 | an entry for this symbol in the .dynsym section. The dynamic | |
3310 | object will contain position independent code, so all references | |
3311 | from the dynamic object to this symbol will go through the global | |
3312 | offset table. The dynamic linker will use the .dynsym entry to | |
3313 | determine the address it must put in the global offset table, so | |
3314 | both the dynamic object and the regular object will refer to the | |
3315 | same memory location for the variable. */ | |
252b5132 RH |
3316 | s = bfd_get_section_by_name (dynobj, ".dynbss"); |
3317 | BFD_ASSERT (s != NULL); | |
3318 | ||
3319 | /* We must generate a R_ARM_COPY reloc to tell the dynamic linker to | |
3320 | copy the initial value out of the dynamic object and into the | |
3321 | runtime process image. We need to remember the offset into the | |
3322 | .rel.bss section we are going to use. */ | |
3323 | if ((h->root.u.def.section->flags & SEC_ALLOC) != 0) | |
3324 | { | |
3325 | asection *srel; | |
3326 | ||
3327 | srel = bfd_get_section_by_name (dynobj, ".rel.bss"); | |
3328 | BFD_ASSERT (srel != NULL); | |
eea6121a | 3329 | srel->size += sizeof (Elf32_External_Rel); |
252b5132 RH |
3330 | h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_COPY; |
3331 | } | |
3332 | ||
3333 | /* We need to figure out the alignment required for this symbol. I | |
3334 | have no idea how ELF linkers handle this. */ | |
3335 | power_of_two = bfd_log2 (h->size); | |
3336 | if (power_of_two > 3) | |
3337 | power_of_two = 3; | |
3338 | ||
3339 | /* Apply the required alignment. */ | |
eea6121a | 3340 | s->size = BFD_ALIGN (s->size, (bfd_size_type) (1 << power_of_two)); |
252b5132 RH |
3341 | if (power_of_two > bfd_get_section_alignment (dynobj, s)) |
3342 | { | |
3343 | if (! bfd_set_section_alignment (dynobj, s, power_of_two)) | |
b34976b6 | 3344 | return FALSE; |
252b5132 RH |
3345 | } |
3346 | ||
3347 | /* Define the symbol as being at this point in the section. */ | |
3348 | h->root.u.def.section = s; | |
eea6121a | 3349 | h->root.u.def.value = s->size; |
252b5132 RH |
3350 | |
3351 | /* Increment the section size to make room for the symbol. */ | |
eea6121a | 3352 | s->size += h->size; |
252b5132 | 3353 | |
b34976b6 | 3354 | return TRUE; |
252b5132 RH |
3355 | } |
3356 | ||
5e681ec4 PB |
3357 | /* Allocate space in .plt, .got and associated reloc sections for |
3358 | dynamic relocs. */ | |
3359 | ||
3360 | static bfd_boolean | |
3361 | allocate_dynrelocs (h, inf) | |
3362 | struct elf_link_hash_entry *h; | |
3363 | PTR inf; | |
3364 | { | |
3365 | struct bfd_link_info *info; | |
3366 | struct elf32_arm_link_hash_table *htab; | |
3367 | struct elf32_arm_link_hash_entry *eh; | |
3368 | struct elf32_arm_relocs_copied *p; | |
3369 | ||
3370 | if (h->root.type == bfd_link_hash_indirect) | |
3371 | return TRUE; | |
3372 | ||
3373 | if (h->root.type == bfd_link_hash_warning) | |
3374 | /* When warning symbols are created, they **replace** the "real" | |
3375 | entry in the hash table, thus we never get to see the real | |
3376 | symbol in a hash traversal. So look at it now. */ | |
3377 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
3378 | ||
3379 | info = (struct bfd_link_info *) inf; | |
3380 | htab = elf32_arm_hash_table (info); | |
3381 | ||
3382 | if (htab->root.dynamic_sections_created | |
3383 | && h->plt.refcount > 0) | |
3384 | { | |
3385 | /* Make sure this symbol is output as a dynamic symbol. | |
3386 | Undefined weak syms won't yet be marked as dynamic. */ | |
3387 | if (h->dynindx == -1 | |
3388 | && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0) | |
3389 | { | |
c152c796 | 3390 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
5e681ec4 PB |
3391 | return FALSE; |
3392 | } | |
3393 | ||
3394 | if (info->shared | |
7359ea65 | 3395 | || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h)) |
5e681ec4 PB |
3396 | { |
3397 | asection *s = htab->splt; | |
3398 | ||
3399 | /* If this is the first .plt entry, make room for the special | |
3400 | first entry. */ | |
eea6121a AM |
3401 | if (s->size == 0) |
3402 | s->size += PLT_HEADER_SIZE; | |
5e681ec4 | 3403 | |
eea6121a | 3404 | h->plt.offset = s->size; |
5e681ec4 PB |
3405 | |
3406 | /* If this symbol is not defined in a regular file, and we are | |
3407 | not generating a shared library, then set the symbol to this | |
3408 | location in the .plt. This is required to make function | |
3409 | pointers compare as equal between the normal executable and | |
3410 | the shared library. */ | |
3411 | if (! info->shared | |
3412 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0) | |
3413 | { | |
3414 | h->root.u.def.section = s; | |
3415 | h->root.u.def.value = h->plt.offset; | |
3416 | } | |
3417 | ||
3418 | /* Make room for this entry. */ | |
eea6121a | 3419 | s->size += PLT_ENTRY_SIZE; |
5e681ec4 PB |
3420 | |
3421 | /* We also need to make an entry in the .got.plt section, which | |
3422 | will be placed in the .got section by the linker script. */ | |
eea6121a | 3423 | htab->sgotplt->size += 4; |
5e681ec4 PB |
3424 | |
3425 | /* We also need to make an entry in the .rel.plt section. */ | |
eea6121a | 3426 | htab->srelplt->size += sizeof (Elf32_External_Rel); |
5e681ec4 PB |
3427 | } |
3428 | else | |
3429 | { | |
3430 | h->plt.offset = (bfd_vma) -1; | |
3431 | h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT; | |
3432 | } | |
3433 | } | |
3434 | else | |
3435 | { | |
3436 | h->plt.offset = (bfd_vma) -1; | |
3437 | h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT; | |
3438 | } | |
3439 | ||
3440 | if (h->got.refcount > 0) | |
3441 | { | |
3442 | asection *s; | |
3443 | bfd_boolean dyn; | |
3444 | ||
3445 | /* Make sure this symbol is output as a dynamic symbol. | |
3446 | Undefined weak syms won't yet be marked as dynamic. */ | |
3447 | if (h->dynindx == -1 | |
3448 | && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0) | |
3449 | { | |
c152c796 | 3450 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
5e681ec4 PB |
3451 | return FALSE; |
3452 | } | |
3453 | ||
3454 | s = htab->sgot; | |
eea6121a AM |
3455 | h->got.offset = s->size; |
3456 | s->size += 4; | |
5e681ec4 PB |
3457 | dyn = htab->root.dynamic_sections_created; |
3458 | if ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT | |
3459 | || h->root.type != bfd_link_hash_undefweak) | |
3460 | && (info->shared | |
3461 | || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))) | |
eea6121a | 3462 | htab->srelgot->size += sizeof (Elf32_External_Rel); |
5e681ec4 PB |
3463 | } |
3464 | else | |
3465 | h->got.offset = (bfd_vma) -1; | |
3466 | ||
3467 | eh = (struct elf32_arm_link_hash_entry *) h; | |
3468 | if (eh->relocs_copied == NULL) | |
3469 | return TRUE; | |
3470 | ||
3471 | /* In the shared -Bsymbolic case, discard space allocated for | |
3472 | dynamic pc-relative relocs against symbols which turn out to be | |
3473 | defined in regular objects. For the normal shared case, discard | |
3474 | space for pc-relative relocs that have become local due to symbol | |
3475 | visibility changes. */ | |
3476 | ||
3477 | if (info->shared) | |
3478 | { | |
7359ea65 DJ |
3479 | /* Discard relocs on undefined weak syms with non-default |
3480 | visibility. */ | |
5e681ec4 PB |
3481 | if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT |
3482 | && h->root.type == bfd_link_hash_undefweak) | |
3483 | eh->relocs_copied = NULL; | |
3484 | } | |
3485 | else | |
3486 | { | |
3487 | /* For the non-shared case, discard space for relocs against | |
3488 | symbols which turn out to need copy relocs or are not | |
3489 | dynamic. */ | |
3490 | ||
3491 | if ((h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0 | |
3492 | && (((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0 | |
3493 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0) | |
3494 | || (htab->root.dynamic_sections_created | |
3495 | && (h->root.type == bfd_link_hash_undefweak | |
3496 | || h->root.type == bfd_link_hash_undefined)))) | |
3497 | { | |
3498 | /* Make sure this symbol is output as a dynamic symbol. | |
3499 | Undefined weak syms won't yet be marked as dynamic. */ | |
3500 | if (h->dynindx == -1 | |
3501 | && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0) | |
3502 | { | |
c152c796 | 3503 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
5e681ec4 PB |
3504 | return FALSE; |
3505 | } | |
3506 | ||
3507 | /* If that succeeded, we know we'll be keeping all the | |
3508 | relocs. */ | |
3509 | if (h->dynindx != -1) | |
3510 | goto keep; | |
3511 | } | |
3512 | ||
3513 | eh->relocs_copied = NULL; | |
3514 | ||
3515 | keep: ; | |
3516 | } | |
3517 | ||
3518 | /* Finally, allocate space. */ | |
3519 | for (p = eh->relocs_copied; p != NULL; p = p->next) | |
3520 | { | |
3521 | asection *sreloc = elf_section_data (p->section)->sreloc; | |
eea6121a | 3522 | sreloc->size += p->count * sizeof (Elf32_External_Rel); |
5e681ec4 PB |
3523 | } |
3524 | ||
3525 | return TRUE; | |
3526 | } | |
3527 | ||
252b5132 RH |
3528 | /* Set the sizes of the dynamic sections. */ |
3529 | ||
b34976b6 | 3530 | static bfd_boolean |
252b5132 | 3531 | elf32_arm_size_dynamic_sections (output_bfd, info) |
99e4ae17 | 3532 | bfd * output_bfd ATTRIBUTE_UNUSED; |
252b5132 RH |
3533 | struct bfd_link_info * info; |
3534 | { | |
3535 | bfd * dynobj; | |
3536 | asection * s; | |
b34976b6 AM |
3537 | bfd_boolean plt; |
3538 | bfd_boolean relocs; | |
5e681ec4 PB |
3539 | bfd *ibfd; |
3540 | struct elf32_arm_link_hash_table *htab; | |
252b5132 | 3541 | |
5e681ec4 | 3542 | htab = elf32_arm_hash_table (info); |
252b5132 RH |
3543 | dynobj = elf_hash_table (info)->dynobj; |
3544 | BFD_ASSERT (dynobj != NULL); | |
3545 | ||
3546 | if (elf_hash_table (info)->dynamic_sections_created) | |
3547 | { | |
3548 | /* Set the contents of the .interp section to the interpreter. */ | |
893c4fe2 | 3549 | if (info->executable) |
252b5132 RH |
3550 | { |
3551 | s = bfd_get_section_by_name (dynobj, ".interp"); | |
3552 | BFD_ASSERT (s != NULL); | |
eea6121a | 3553 | s->size = sizeof ELF_DYNAMIC_INTERPRETER; |
252b5132 RH |
3554 | s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER; |
3555 | } | |
3556 | } | |
5e681ec4 PB |
3557 | |
3558 | /* Set up .got offsets for local syms, and space for local dynamic | |
3559 | relocs. */ | |
3560 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next) | |
252b5132 | 3561 | { |
5e681ec4 PB |
3562 | bfd_signed_vma *local_got; |
3563 | bfd_signed_vma *end_local_got; | |
3564 | char *local_tls_type; | |
3565 | bfd_size_type locsymcount; | |
3566 | Elf_Internal_Shdr *symtab_hdr; | |
3567 | asection *srel; | |
3568 | ||
3569 | if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour) | |
3570 | continue; | |
3571 | ||
3572 | for (s = ibfd->sections; s != NULL; s = s->next) | |
3573 | { | |
3574 | struct elf32_arm_relocs_copied *p; | |
3575 | ||
3576 | for (p = *((struct elf32_arm_relocs_copied **) | |
3577 | &elf_section_data (s)->local_dynrel); | |
3578 | p != NULL; | |
3579 | p = p->next) | |
3580 | { | |
3581 | if (!bfd_is_abs_section (p->section) | |
3582 | && bfd_is_abs_section (p->section->output_section)) | |
3583 | { | |
3584 | /* Input section has been discarded, either because | |
3585 | it is a copy of a linkonce section or due to | |
3586 | linker script /DISCARD/, so we'll be discarding | |
3587 | the relocs too. */ | |
3588 | } | |
3589 | else if (p->count != 0) | |
3590 | { | |
3591 | srel = elf_section_data (p->section)->sreloc; | |
eea6121a | 3592 | srel->size += p->count * sizeof (Elf32_External_Rel); |
5e681ec4 PB |
3593 | if ((p->section->output_section->flags & SEC_READONLY) != 0) |
3594 | info->flags |= DF_TEXTREL; | |
3595 | } | |
3596 | } | |
3597 | } | |
3598 | ||
3599 | local_got = elf_local_got_refcounts (ibfd); | |
3600 | if (!local_got) | |
3601 | continue; | |
3602 | ||
3603 | symtab_hdr = &elf_tdata (ibfd)->symtab_hdr; | |
3604 | locsymcount = symtab_hdr->sh_info; | |
3605 | end_local_got = local_got + locsymcount; | |
3606 | s = htab->sgot; | |
3607 | srel = htab->srelgot; | |
3608 | for (; local_got < end_local_got; ++local_got, ++local_tls_type) | |
3609 | { | |
3610 | if (*local_got > 0) | |
3611 | { | |
eea6121a AM |
3612 | *local_got = s->size; |
3613 | s->size += 4; | |
5e681ec4 | 3614 | if (info->shared) |
eea6121a | 3615 | srel->size += sizeof (Elf32_External_Rel); |
5e681ec4 PB |
3616 | } |
3617 | else | |
3618 | *local_got = (bfd_vma) -1; | |
3619 | } | |
252b5132 RH |
3620 | } |
3621 | ||
5e681ec4 PB |
3622 | /* Allocate global sym .plt and .got entries, and space for global |
3623 | sym dynamic relocs. */ | |
3624 | elf_link_hash_traverse (&htab->root, allocate_dynrelocs, (PTR) info); | |
252b5132 RH |
3625 | |
3626 | /* The check_relocs and adjust_dynamic_symbol entry points have | |
3627 | determined the sizes of the various dynamic sections. Allocate | |
3628 | memory for them. */ | |
b34976b6 AM |
3629 | plt = FALSE; |
3630 | relocs = FALSE; | |
252b5132 RH |
3631 | for (s = dynobj->sections; s != NULL; s = s->next) |
3632 | { | |
3633 | const char * name; | |
b34976b6 | 3634 | bfd_boolean strip; |
252b5132 RH |
3635 | |
3636 | if ((s->flags & SEC_LINKER_CREATED) == 0) | |
3637 | continue; | |
3638 | ||
3639 | /* It's OK to base decisions on the section name, because none | |
3640 | of the dynobj section names depend upon the input files. */ | |
3641 | name = bfd_get_section_name (dynobj, s); | |
3642 | ||
b34976b6 | 3643 | strip = FALSE; |
252b5132 | 3644 | |
24a1ba0f | 3645 | if (strcmp (name, ".plt") == 0) |
252b5132 | 3646 | { |
eea6121a | 3647 | if (s->size == 0) |
252b5132 RH |
3648 | { |
3649 | /* Strip this section if we don't need it; see the | |
3650 | comment below. */ | |
b34976b6 | 3651 | strip = TRUE; |
252b5132 RH |
3652 | } |
3653 | else | |
3654 | { | |
3655 | /* Remember whether there is a PLT. */ | |
b34976b6 | 3656 | plt = TRUE; |
252b5132 RH |
3657 | } |
3658 | } | |
3659 | else if (strncmp (name, ".rel", 4) == 0) | |
3660 | { | |
eea6121a | 3661 | if (s->size == 0) |
252b5132 RH |
3662 | { |
3663 | /* If we don't need this section, strip it from the | |
3664 | output file. This is mostly to handle .rel.bss and | |
3665 | .rel.plt. We must create both sections in | |
3666 | create_dynamic_sections, because they must be created | |
3667 | before the linker maps input sections to output | |
3668 | sections. The linker does that before | |
3669 | adjust_dynamic_symbol is called, and it is that | |
3670 | function which decides whether anything needs to go | |
3671 | into these sections. */ | |
b34976b6 | 3672 | strip = TRUE; |
252b5132 RH |
3673 | } |
3674 | else | |
3675 | { | |
252b5132 RH |
3676 | /* Remember whether there are any reloc sections other |
3677 | than .rel.plt. */ | |
3678 | if (strcmp (name, ".rel.plt") != 0) | |
b34976b6 | 3679 | relocs = TRUE; |
252b5132 RH |
3680 | |
3681 | /* We use the reloc_count field as a counter if we need | |
3682 | to copy relocs into the output file. */ | |
3683 | s->reloc_count = 0; | |
3684 | } | |
3685 | } | |
3686 | else if (strncmp (name, ".got", 4) != 0) | |
3687 | { | |
3688 | /* It's not one of our sections, so don't allocate space. */ | |
3689 | continue; | |
3690 | } | |
3691 | ||
3692 | if (strip) | |
3693 | { | |
52585bb8 | 3694 | _bfd_strip_section_from_output (info, s); |
252b5132 RH |
3695 | continue; |
3696 | } | |
3697 | ||
3698 | /* Allocate memory for the section contents. */ | |
eea6121a AM |
3699 | s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size); |
3700 | if (s->contents == NULL && s->size != 0) | |
b34976b6 | 3701 | return FALSE; |
252b5132 RH |
3702 | } |
3703 | ||
3704 | if (elf_hash_table (info)->dynamic_sections_created) | |
3705 | { | |
3706 | /* Add some entries to the .dynamic section. We fill in the | |
3707 | values later, in elf32_arm_finish_dynamic_sections, but we | |
3708 | must add the entries now so that we get the correct size for | |
3709 | the .dynamic section. The DT_DEBUG entry is filled in by the | |
3710 | dynamic linker and used by the debugger. */ | |
dc810e39 | 3711 | #define add_dynamic_entry(TAG, VAL) \ |
5a580b3a | 3712 | _bfd_elf_add_dynamic_entry (info, TAG, VAL) |
dc810e39 AM |
3713 | |
3714 | if (!info->shared) | |
252b5132 | 3715 | { |
dc810e39 | 3716 | if (!add_dynamic_entry (DT_DEBUG, 0)) |
b34976b6 | 3717 | return FALSE; |
252b5132 RH |
3718 | } |
3719 | ||
3720 | if (plt) | |
3721 | { | |
dc810e39 AM |
3722 | if ( !add_dynamic_entry (DT_PLTGOT, 0) |
3723 | || !add_dynamic_entry (DT_PLTRELSZ, 0) | |
3724 | || !add_dynamic_entry (DT_PLTREL, DT_REL) | |
3725 | || !add_dynamic_entry (DT_JMPREL, 0)) | |
b34976b6 | 3726 | return FALSE; |
252b5132 RH |
3727 | } |
3728 | ||
3729 | if (relocs) | |
3730 | { | |
dc810e39 AM |
3731 | if ( !add_dynamic_entry (DT_REL, 0) |
3732 | || !add_dynamic_entry (DT_RELSZ, 0) | |
3733 | || !add_dynamic_entry (DT_RELENT, sizeof (Elf32_External_Rel))) | |
b34976b6 | 3734 | return FALSE; |
252b5132 RH |
3735 | } |
3736 | ||
99e4ae17 | 3737 | if ((info->flags & DF_TEXTREL) != 0) |
252b5132 | 3738 | { |
dc810e39 | 3739 | if (!add_dynamic_entry (DT_TEXTREL, 0)) |
b34976b6 | 3740 | return FALSE; |
d6cf2879 | 3741 | info->flags |= DF_TEXTREL; |
252b5132 RH |
3742 | } |
3743 | } | |
dc810e39 | 3744 | #undef add_synamic_entry |
252b5132 | 3745 | |
b34976b6 | 3746 | return TRUE; |
252b5132 RH |
3747 | } |
3748 | ||
252b5132 RH |
3749 | /* Finish up dynamic symbol handling. We set the contents of various |
3750 | dynamic sections here. */ | |
3751 | ||
b34976b6 | 3752 | static bfd_boolean |
252b5132 RH |
3753 | elf32_arm_finish_dynamic_symbol (output_bfd, info, h, sym) |
3754 | bfd * output_bfd; | |
3755 | struct bfd_link_info * info; | |
3756 | struct elf_link_hash_entry * h; | |
3757 | Elf_Internal_Sym * sym; | |
3758 | { | |
3759 | bfd * dynobj; | |
3760 | ||
3761 | dynobj = elf_hash_table (info)->dynobj; | |
3762 | ||
3763 | if (h->plt.offset != (bfd_vma) -1) | |
3764 | { | |
3765 | asection * splt; | |
3766 | asection * sgot; | |
3767 | asection * srel; | |
24a1ba0f NC |
3768 | bfd_vma plt_index; |
3769 | bfd_vma got_offset; | |
947216bf AM |
3770 | Elf_Internal_Rela rel; |
3771 | bfd_byte *loc; | |
5e681ec4 | 3772 | bfd_vma got_displacement; |
252b5132 RH |
3773 | |
3774 | /* This symbol has an entry in the procedure linkage table. Set | |
3775 | it up. */ | |
3776 | ||
3777 | BFD_ASSERT (h->dynindx != -1); | |
3778 | ||
3779 | splt = bfd_get_section_by_name (dynobj, ".plt"); | |
3780 | sgot = bfd_get_section_by_name (dynobj, ".got.plt"); | |
3781 | srel = bfd_get_section_by_name (dynobj, ".rel.plt"); | |
24a1ba0f | 3782 | BFD_ASSERT (splt != NULL && sgot != NULL && srel != NULL); |
252b5132 | 3783 | |
24a1ba0f NC |
3784 | /* Get the index in the procedure linkage table which |
3785 | corresponds to this symbol. This is the index of this symbol | |
3786 | in all the symbols for which we are making plt entries. The | |
3787 | first entry in the procedure linkage table is reserved. */ | |
5e681ec4 | 3788 | plt_index = (h->plt.offset - PLT_HEADER_SIZE) / PLT_ENTRY_SIZE; |
252b5132 | 3789 | |
24a1ba0f NC |
3790 | /* Get the offset into the .got table of the entry that |
3791 | corresponds to this function. Each .got entry is 4 bytes. | |
3792 | The first three are reserved. */ | |
3793 | got_offset = (plt_index + 3) * 4; | |
252b5132 | 3794 | |
5e681ec4 PB |
3795 | /* Calculate the displacement between the PLT slot and the |
3796 | entry in the GOT. */ | |
3797 | got_displacement = (sgot->output_section->vma | |
3798 | + sgot->output_offset | |
3799 | + got_offset | |
3800 | - splt->output_section->vma | |
3801 | - splt->output_offset | |
3802 | - h->plt.offset | |
3803 | - 8); | |
3804 | ||
3805 | BFD_ASSERT ((got_displacement & 0xf0000000) == 0); | |
3806 | ||
252b5132 | 3807 | /* Fill in the entry in the procedure linkage table. */ |
5e681ec4 | 3808 | bfd_put_32 (output_bfd, elf32_arm_plt_entry[0] | ((got_displacement & 0x0ff00000) >> 20), |
24a1ba0f | 3809 | splt->contents + h->plt.offset + 0); |
5e681ec4 | 3810 | bfd_put_32 (output_bfd, elf32_arm_plt_entry[1] | ((got_displacement & 0x000ff000) >> 12), |
24a1ba0f | 3811 | splt->contents + h->plt.offset + 4); |
5e681ec4 | 3812 | bfd_put_32 (output_bfd, elf32_arm_plt_entry[2] | (got_displacement & 0x00000fff), |
24a1ba0f | 3813 | splt->contents + h->plt.offset + 8); |
5e681ec4 PB |
3814 | #ifdef FOUR_WORD_PLT |
3815 | bfd_put_32 (output_bfd, elf32_arm_plt_entry[3], | |
3816 | splt->contents + h->plt.offset + 12); | |
3817 | #endif | |
252b5132 | 3818 | |
24a1ba0f NC |
3819 | /* Fill in the entry in the global offset table. */ |
3820 | bfd_put_32 (output_bfd, | |
3821 | (splt->output_section->vma | |
3822 | + splt->output_offset), | |
3823 | sgot->contents + got_offset); | |
5e681ec4 | 3824 | |
252b5132 RH |
3825 | /* Fill in the entry in the .rel.plt section. */ |
3826 | rel.r_offset = (sgot->output_section->vma | |
3827 | + sgot->output_offset | |
24a1ba0f | 3828 | + got_offset); |
252b5132 | 3829 | rel.r_info = ELF32_R_INFO (h->dynindx, R_ARM_JUMP_SLOT); |
947216bf AM |
3830 | loc = srel->contents + plt_index * sizeof (Elf32_External_Rel); |
3831 | bfd_elf32_swap_reloc_out (output_bfd, &rel, loc); | |
252b5132 RH |
3832 | |
3833 | if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0) | |
3834 | { | |
3835 | /* Mark the symbol as undefined, rather than as defined in | |
3836 | the .plt section. Leave the value alone. */ | |
3837 | sym->st_shndx = SHN_UNDEF; | |
d982ba73 PB |
3838 | /* If the symbol is weak, we do need to clear the value. |
3839 | Otherwise, the PLT entry would provide a definition for | |
3840 | the symbol even if the symbol wasn't defined anywhere, | |
3841 | and so the symbol would never be NULL. */ | |
3842 | if ((h->elf_link_hash_flags & ELF_LINK_HASH_REF_REGULAR_NONWEAK) | |
3843 | == 0) | |
3844 | sym->st_value = 0; | |
252b5132 RH |
3845 | } |
3846 | } | |
3847 | ||
3848 | if (h->got.offset != (bfd_vma) -1) | |
3849 | { | |
3850 | asection * sgot; | |
3851 | asection * srel; | |
947216bf AM |
3852 | Elf_Internal_Rela rel; |
3853 | bfd_byte *loc; | |
252b5132 RH |
3854 | |
3855 | /* This symbol has an entry in the global offset table. Set it | |
3856 | up. */ | |
252b5132 RH |
3857 | sgot = bfd_get_section_by_name (dynobj, ".got"); |
3858 | srel = bfd_get_section_by_name (dynobj, ".rel.got"); | |
3859 | BFD_ASSERT (sgot != NULL && srel != NULL); | |
3860 | ||
3861 | rel.r_offset = (sgot->output_section->vma | |
3862 | + sgot->output_offset | |
dc810e39 | 3863 | + (h->got.offset &~ (bfd_vma) 1)); |
252b5132 | 3864 | |
5e681ec4 PB |
3865 | /* If this is a static link, or it is a -Bsymbolic link and the |
3866 | symbol is defined locally or was forced to be local because | |
3867 | of a version file, we just want to emit a RELATIVE reloc. | |
3868 | The entry in the global offset table will already have been | |
3869 | initialized in the relocate_section function. */ | |
252b5132 | 3870 | if (info->shared |
5e681ec4 PB |
3871 | && SYMBOL_REFERENCES_LOCAL (info, h)) |
3872 | { | |
3873 | BFD_ASSERT((h->got.offset & 1) != 0); | |
3874 | rel.r_info = ELF32_R_INFO (0, R_ARM_RELATIVE); | |
3875 | } | |
252b5132 RH |
3876 | else |
3877 | { | |
5e681ec4 | 3878 | BFD_ASSERT((h->got.offset & 1) == 0); |
252b5132 RH |
3879 | bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + h->got.offset); |
3880 | rel.r_info = ELF32_R_INFO (h->dynindx, R_ARM_GLOB_DAT); | |
3881 | } | |
3882 | ||
947216bf AM |
3883 | loc = srel->contents + srel->reloc_count++ * sizeof (Elf32_External_Rel); |
3884 | bfd_elf32_swap_reloc_out (output_bfd, &rel, loc); | |
252b5132 RH |
3885 | } |
3886 | ||
3887 | if ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_COPY) != 0) | |
3888 | { | |
3889 | asection * s; | |
947216bf AM |
3890 | Elf_Internal_Rela rel; |
3891 | bfd_byte *loc; | |
252b5132 RH |
3892 | |
3893 | /* This symbol needs a copy reloc. Set it up. */ | |
252b5132 RH |
3894 | BFD_ASSERT (h->dynindx != -1 |
3895 | && (h->root.type == bfd_link_hash_defined | |
3896 | || h->root.type == bfd_link_hash_defweak)); | |
3897 | ||
3898 | s = bfd_get_section_by_name (h->root.u.def.section->owner, | |
3899 | ".rel.bss"); | |
3900 | BFD_ASSERT (s != NULL); | |
3901 | ||
3902 | rel.r_offset = (h->root.u.def.value | |
3903 | + h->root.u.def.section->output_section->vma | |
3904 | + h->root.u.def.section->output_offset); | |
3905 | rel.r_info = ELF32_R_INFO (h->dynindx, R_ARM_COPY); | |
947216bf AM |
3906 | loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rel); |
3907 | bfd_elf32_swap_reloc_out (output_bfd, &rel, loc); | |
252b5132 RH |
3908 | } |
3909 | ||
3910 | /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */ | |
3911 | if (strcmp (h->root.root.string, "_DYNAMIC") == 0 | |
3912 | || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0) | |
3913 | sym->st_shndx = SHN_ABS; | |
3914 | ||
b34976b6 | 3915 | return TRUE; |
252b5132 RH |
3916 | } |
3917 | ||
3918 | /* Finish up the dynamic sections. */ | |
3919 | ||
b34976b6 | 3920 | static bfd_boolean |
252b5132 RH |
3921 | elf32_arm_finish_dynamic_sections (output_bfd, info) |
3922 | bfd * output_bfd; | |
3923 | struct bfd_link_info * info; | |
3924 | { | |
3925 | bfd * dynobj; | |
3926 | asection * sgot; | |
3927 | asection * sdyn; | |
3928 | ||
3929 | dynobj = elf_hash_table (info)->dynobj; | |
3930 | ||
3931 | sgot = bfd_get_section_by_name (dynobj, ".got.plt"); | |
3932 | BFD_ASSERT (sgot != NULL); | |
3933 | sdyn = bfd_get_section_by_name (dynobj, ".dynamic"); | |
3934 | ||
3935 | if (elf_hash_table (info)->dynamic_sections_created) | |
3936 | { | |
3937 | asection *splt; | |
3938 | Elf32_External_Dyn *dyncon, *dynconend; | |
3939 | ||
3940 | splt = bfd_get_section_by_name (dynobj, ".plt"); | |
24a1ba0f | 3941 | BFD_ASSERT (splt != NULL && sdyn != NULL); |
252b5132 RH |
3942 | |
3943 | dyncon = (Elf32_External_Dyn *) sdyn->contents; | |
eea6121a | 3944 | dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size); |
9b485d32 | 3945 | |
252b5132 RH |
3946 | for (; dyncon < dynconend; dyncon++) |
3947 | { | |
3948 | Elf_Internal_Dyn dyn; | |
3949 | const char * name; | |
3950 | asection * s; | |
3951 | ||
3952 | bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn); | |
3953 | ||
3954 | switch (dyn.d_tag) | |
3955 | { | |
3956 | default: | |
3957 | break; | |
3958 | ||
3959 | case DT_PLTGOT: | |
3960 | name = ".got"; | |
3961 | goto get_vma; | |
3962 | case DT_JMPREL: | |
3963 | name = ".rel.plt"; | |
3964 | get_vma: | |
3965 | s = bfd_get_section_by_name (output_bfd, name); | |
3966 | BFD_ASSERT (s != NULL); | |
3967 | dyn.d_un.d_ptr = s->vma; | |
3968 | bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); | |
3969 | break; | |
3970 | ||
3971 | case DT_PLTRELSZ: | |
3972 | s = bfd_get_section_by_name (output_bfd, ".rel.plt"); | |
3973 | BFD_ASSERT (s != NULL); | |
eea6121a | 3974 | dyn.d_un.d_val = s->size; |
252b5132 RH |
3975 | bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); |
3976 | break; | |
3977 | ||
3978 | case DT_RELSZ: | |
3979 | /* My reading of the SVR4 ABI indicates that the | |
3980 | procedure linkage table relocs (DT_JMPREL) should be | |
3981 | included in the overall relocs (DT_REL). This is | |
3982 | what Solaris does. However, UnixWare can not handle | |
3983 | that case. Therefore, we override the DT_RELSZ entry | |
3984 | here to make it not include the JMPREL relocs. Since | |
3985 | the linker script arranges for .rel.plt to follow all | |
3986 | other relocation sections, we don't have to worry | |
3987 | about changing the DT_REL entry. */ | |
3988 | s = bfd_get_section_by_name (output_bfd, ".rel.plt"); | |
3989 | if (s != NULL) | |
eea6121a | 3990 | dyn.d_un.d_val -= s->size; |
252b5132 RH |
3991 | bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); |
3992 | break; | |
88f7bcd5 NC |
3993 | |
3994 | /* Set the bottom bit of DT_INIT/FINI if the | |
3995 | corresponding function is Thumb. */ | |
3996 | case DT_INIT: | |
3997 | name = info->init_function; | |
3998 | goto get_sym; | |
3999 | case DT_FINI: | |
4000 | name = info->fini_function; | |
4001 | get_sym: | |
4002 | /* If it wasn't set by elf_bfd_final_link | |
4cc11e76 | 4003 | then there is nothing to adjust. */ |
88f7bcd5 NC |
4004 | if (dyn.d_un.d_val != 0) |
4005 | { | |
4006 | struct elf_link_hash_entry * eh; | |
4007 | ||
4008 | eh = elf_link_hash_lookup (elf_hash_table (info), name, | |
b34976b6 | 4009 | FALSE, FALSE, TRUE); |
88f7bcd5 NC |
4010 | if (eh != (struct elf_link_hash_entry *) NULL |
4011 | && ELF_ST_TYPE (eh->type) == STT_ARM_TFUNC) | |
4012 | { | |
4013 | dyn.d_un.d_val |= 1; | |
b34976b6 | 4014 | bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); |
88f7bcd5 NC |
4015 | } |
4016 | } | |
4017 | break; | |
252b5132 RH |
4018 | } |
4019 | } | |
4020 | ||
24a1ba0f | 4021 | /* Fill in the first entry in the procedure linkage table. */ |
eea6121a | 4022 | if (splt->size > 0) |
f7a74f8c | 4023 | { |
5e681ec4 PB |
4024 | bfd_vma got_displacement; |
4025 | ||
4026 | /* Calculate the displacement between the PLT slot and &GOT[0]. */ | |
4027 | got_displacement = (sgot->output_section->vma | |
4028 | + sgot->output_offset | |
4029 | - splt->output_section->vma | |
4030 | - splt->output_offset | |
4031 | - 16); | |
4032 | ||
f7a74f8c NC |
4033 | bfd_put_32 (output_bfd, elf32_arm_plt0_entry[0], splt->contents + 0); |
4034 | bfd_put_32 (output_bfd, elf32_arm_plt0_entry[1], splt->contents + 4); | |
4035 | bfd_put_32 (output_bfd, elf32_arm_plt0_entry[2], splt->contents + 8); | |
4036 | bfd_put_32 (output_bfd, elf32_arm_plt0_entry[3], splt->contents + 12); | |
5e681ec4 PB |
4037 | #ifdef FOUR_WORD_PLT |
4038 | /* The displacement value goes in the otherwise-unused last word of | |
4039 | the second entry. */ | |
4040 | bfd_put_32 (output_bfd, got_displacement, splt->contents + 28); | |
4041 | #else | |
4042 | bfd_put_32 (output_bfd, got_displacement, splt->contents + 16); | |
4043 | #endif | |
f7a74f8c | 4044 | } |
252b5132 RH |
4045 | |
4046 | /* UnixWare sets the entsize of .plt to 4, although that doesn't | |
4047 | really seem like the right value. */ | |
4048 | elf_section_data (splt->output_section)->this_hdr.sh_entsize = 4; | |
4049 | } | |
4050 | ||
4051 | /* Fill in the first three entries in the global offset table. */ | |
eea6121a | 4052 | if (sgot->size > 0) |
252b5132 RH |
4053 | { |
4054 | if (sdyn == NULL) | |
4055 | bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents); | |
4056 | else | |
4057 | bfd_put_32 (output_bfd, | |
4058 | sdyn->output_section->vma + sdyn->output_offset, | |
4059 | sgot->contents); | |
4060 | bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 4); | |
4061 | bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 8); | |
4062 | } | |
4063 | ||
4064 | elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4; | |
4065 | ||
b34976b6 | 4066 | return TRUE; |
252b5132 RH |
4067 | } |
4068 | ||
ba96a88f NC |
4069 | static void |
4070 | elf32_arm_post_process_headers (abfd, link_info) | |
4071 | bfd * abfd; | |
5f771d47 | 4072 | struct bfd_link_info * link_info ATTRIBUTE_UNUSED; |
ba96a88f | 4073 | { |
9b485d32 | 4074 | Elf_Internal_Ehdr * i_ehdrp; /* ELF file header, internal form. */ |
e489d0ae | 4075 | struct elf32_arm_link_hash_table *globals; |
ba96a88f NC |
4076 | |
4077 | i_ehdrp = elf_elfheader (abfd); | |
4078 | ||
4079 | i_ehdrp->e_ident[EI_OSABI] = ARM_ELF_OS_ABI_VERSION; | |
4080 | i_ehdrp->e_ident[EI_ABIVERSION] = ARM_ELF_ABI_VERSION; | |
e489d0ae | 4081 | |
93204d3a PB |
4082 | if (link_info) |
4083 | { | |
4084 | globals = elf32_arm_hash_table (link_info); | |
4085 | if (globals->byteswap_code) | |
4086 | i_ehdrp->e_flags |= EF_ARM_BE8; | |
4087 | } | |
ba96a88f NC |
4088 | } |
4089 | ||
99e4ae17 | 4090 | static enum elf_reloc_type_class |
f51e552e AM |
4091 | elf32_arm_reloc_type_class (rela) |
4092 | const Elf_Internal_Rela *rela; | |
99e4ae17 | 4093 | { |
f51e552e | 4094 | switch ((int) ELF32_R_TYPE (rela->r_info)) |
99e4ae17 AJ |
4095 | { |
4096 | case R_ARM_RELATIVE: | |
4097 | return reloc_class_relative; | |
4098 | case R_ARM_JUMP_SLOT: | |
4099 | return reloc_class_plt; | |
4100 | case R_ARM_COPY: | |
4101 | return reloc_class_copy; | |
4102 | default: | |
4103 | return reloc_class_normal; | |
4104 | } | |
4105 | } | |
4106 | ||
1829f4b2 | 4107 | static bfd_boolean elf32_arm_section_flags PARAMS ((flagword *, const Elf_Internal_Shdr *)); |
e16bb312 NC |
4108 | static void elf32_arm_final_write_processing PARAMS ((bfd *, bfd_boolean)); |
4109 | ||
4110 | /* Set the right machine number for an Arm ELF file. */ | |
4111 | ||
4112 | static bfd_boolean | |
4113 | elf32_arm_section_flags (flags, hdr) | |
4114 | flagword *flags; | |
1829f4b2 | 4115 | const Elf_Internal_Shdr *hdr; |
e16bb312 NC |
4116 | { |
4117 | if (hdr->sh_type == SHT_NOTE) | |
4118 | *flags |= SEC_LINK_ONCE | SEC_LINK_DUPLICATES_SAME_CONTENTS; | |
4119 | ||
4120 | return TRUE; | |
4121 | } | |
4122 | ||
e489d0ae | 4123 | static void |
e16bb312 NC |
4124 | elf32_arm_final_write_processing (abfd, linker) |
4125 | bfd *abfd; | |
4126 | bfd_boolean linker ATTRIBUTE_UNUSED; | |
4127 | { | |
5a6c6817 | 4128 | bfd_arm_update_notes (abfd, ARM_NOTE_SECTION); |
e16bb312 NC |
4129 | } |
4130 | ||
e489d0ae PB |
4131 | |
4132 | /* Called for each symbol. Builds a section map based on mapping symbols. | |
4133 | Does not alter any of the symbols. */ | |
4134 | ||
4135 | static bfd_boolean | |
4136 | elf32_arm_output_symbol_hook (struct bfd_link_info *info, | |
4137 | const char *name, | |
4138 | Elf_Internal_Sym *elfsym, | |
4139 | asection *input_sec, | |
4140 | struct elf_link_hash_entry *h ATTRIBUTE_UNUSED) | |
4141 | { | |
4142 | int mapcount; | |
4143 | elf32_arm_section_map *map; | |
4144 | struct elf32_arm_link_hash_table *globals; | |
4145 | ||
4146 | /* Only do this on final link. */ | |
4147 | if (info->relocatable) | |
4148 | return TRUE; | |
4149 | ||
4150 | /* Only build a map if we need to byteswap code. */ | |
4151 | globals = elf32_arm_hash_table (info); | |
4152 | if (!globals->byteswap_code) | |
4153 | return TRUE; | |
4154 | ||
4155 | /* We only want mapping symbols. */ | |
4156 | if (name == NULL | |
4157 | || name[0] != '$' | |
4158 | || (name[1] != 'a' | |
4159 | && name[1] != 't' | |
4160 | && name[1] != 'd')) | |
4161 | return TRUE; | |
4162 | ||
4163 | mapcount = ++(elf32_arm_section_data (input_sec)->mapcount); | |
4164 | map = elf32_arm_section_data (input_sec)->map; | |
4165 | /* TODO: This may be inefficient, but we probably don't usually have many | |
4166 | mapping symbols per section. */ | |
4167 | map = bfd_realloc (map, mapcount * sizeof (elf32_arm_section_map)); | |
4168 | elf32_arm_section_data (input_sec)->map = map; | |
4169 | ||
4170 | map[mapcount - 1].vma = elfsym->st_value; | |
4171 | map[mapcount - 1].type = name[1]; | |
4172 | return TRUE; | |
4173 | } | |
4174 | ||
4175 | ||
4176 | /* Allocate target specific section data. */ | |
4177 | ||
4178 | static bfd_boolean | |
4179 | elf32_arm_new_section_hook (bfd *abfd, asection *sec) | |
4180 | { | |
4181 | struct _arm_elf_section_data *sdata; | |
4182 | bfd_size_type amt = sizeof (*sdata); | |
4183 | ||
4184 | sdata = bfd_zalloc (abfd, amt); | |
4185 | if (sdata == NULL) | |
4186 | return FALSE; | |
4187 | sec->used_by_bfd = sdata; | |
4188 | ||
4189 | return _bfd_elf_new_section_hook (abfd, sec); | |
4190 | } | |
4191 | ||
4192 | ||
4193 | /* Used to order a list of mapping symbols by address. */ | |
4194 | ||
4195 | static int | |
4196 | elf32_arm_compare_mapping (const void * a, const void * b) | |
4197 | { | |
4198 | return ((const elf32_arm_section_map *) a)->vma | |
4199 | > ((const elf32_arm_section_map *) b)->vma; | |
4200 | } | |
4201 | ||
4202 | ||
4203 | /* Do code byteswapping. Return FALSE afterwards so that the section is | |
4204 | written out as normal. */ | |
4205 | ||
4206 | static bfd_boolean | |
4207 | elf32_arm_write_section (bfd *output_bfd ATTRIBUTE_UNUSED, asection *sec, | |
4208 | bfd_byte *contents) | |
4209 | { | |
4210 | int mapcount; | |
4211 | elf32_arm_section_map *map; | |
4212 | bfd_vma ptr; | |
4213 | bfd_vma end; | |
4214 | bfd_vma offset; | |
4215 | bfd_byte tmp; | |
4216 | int i; | |
4217 | ||
4218 | mapcount = elf32_arm_section_data (sec)->mapcount; | |
4219 | map = elf32_arm_section_data (sec)->map; | |
4220 | ||
4221 | if (mapcount == 0) | |
4222 | return FALSE; | |
4223 | ||
4224 | qsort (map, mapcount, sizeof (elf32_arm_section_map), | |
4225 | elf32_arm_compare_mapping); | |
4226 | ||
4227 | offset = sec->output_section->vma + sec->output_offset; | |
4228 | ptr = map[0].vma - offset; | |
4229 | for (i = 0; i < mapcount; i++) | |
4230 | { | |
4231 | if (i == mapcount - 1) | |
eea6121a | 4232 | end = sec->size; |
e489d0ae PB |
4233 | else |
4234 | end = map[i + 1].vma - offset; | |
4235 | ||
4236 | switch (map[i].type) | |
4237 | { | |
4238 | case 'a': | |
4239 | /* Byte swap code words. */ | |
4240 | while (ptr + 3 < end) | |
4241 | { | |
4242 | tmp = contents[ptr]; | |
4243 | contents[ptr] = contents[ptr + 3]; | |
4244 | contents[ptr + 3] = tmp; | |
4245 | tmp = contents[ptr + 1]; | |
4246 | contents[ptr + 1] = contents[ptr + 2]; | |
4247 | contents[ptr + 2] = tmp; | |
4248 | ptr += 4; | |
4249 | } | |
4250 | break; | |
4251 | ||
4252 | case 't': | |
4253 | /* Byte swap code halfwords. */ | |
4254 | while (ptr + 1 < end) | |
4255 | { | |
4256 | tmp = contents[ptr]; | |
4257 | contents[ptr] = contents[ptr + 1]; | |
4258 | contents[ptr + 1] = tmp; | |
4259 | ptr += 2; | |
4260 | } | |
4261 | break; | |
4262 | ||
4263 | case 'd': | |
4264 | /* Leave data alone. */ | |
4265 | break; | |
4266 | } | |
4267 | ptr = end; | |
4268 | } | |
93204d3a | 4269 | free (map); |
e489d0ae PB |
4270 | return FALSE; |
4271 | } | |
4272 | ||
252b5132 RH |
4273 | #define ELF_ARCH bfd_arch_arm |
4274 | #define ELF_MACHINE_CODE EM_ARM | |
d0facd1b NC |
4275 | #ifdef __QNXTARGET__ |
4276 | #define ELF_MAXPAGESIZE 0x1000 | |
4277 | #else | |
f21f3fe0 | 4278 | #define ELF_MAXPAGESIZE 0x8000 |
d0facd1b | 4279 | #endif |
252b5132 | 4280 | |
99e4ae17 AJ |
4281 | #define bfd_elf32_bfd_copy_private_bfd_data elf32_arm_copy_private_bfd_data |
4282 | #define bfd_elf32_bfd_merge_private_bfd_data elf32_arm_merge_private_bfd_data | |
252b5132 RH |
4283 | #define bfd_elf32_bfd_set_private_flags elf32_arm_set_private_flags |
4284 | #define bfd_elf32_bfd_print_private_bfd_data elf32_arm_print_private_bfd_data | |
4285 | #define bfd_elf32_bfd_link_hash_table_create elf32_arm_link_hash_table_create | |
dc810e39 | 4286 | #define bfd_elf32_bfd_reloc_type_lookup elf32_arm_reloc_type_lookup |
252b5132 | 4287 | #define bfd_elf32_find_nearest_line elf32_arm_find_nearest_line |
e489d0ae | 4288 | #define bfd_elf32_new_section_hook elf32_arm_new_section_hook |
252b5132 RH |
4289 | |
4290 | #define elf_backend_get_symbol_type elf32_arm_get_symbol_type | |
4291 | #define elf_backend_gc_mark_hook elf32_arm_gc_mark_hook | |
4292 | #define elf_backend_gc_sweep_hook elf32_arm_gc_sweep_hook | |
4293 | #define elf_backend_check_relocs elf32_arm_check_relocs | |
dc810e39 | 4294 | #define elf_backend_relocate_section elf32_arm_relocate_section |
e489d0ae | 4295 | #define elf_backend_write_section elf32_arm_write_section |
252b5132 | 4296 | #define elf_backend_adjust_dynamic_symbol elf32_arm_adjust_dynamic_symbol |
5e681ec4 | 4297 | #define elf_backend_create_dynamic_sections elf32_arm_create_dynamic_sections |
252b5132 RH |
4298 | #define elf_backend_finish_dynamic_symbol elf32_arm_finish_dynamic_symbol |
4299 | #define elf_backend_finish_dynamic_sections elf32_arm_finish_dynamic_sections | |
e489d0ae | 4300 | #define elf_backend_link_output_symbol_hook elf32_arm_output_symbol_hook |
252b5132 | 4301 | #define elf_backend_size_dynamic_sections elf32_arm_size_dynamic_sections |
ba96a88f | 4302 | #define elf_backend_post_process_headers elf32_arm_post_process_headers |
99e4ae17 | 4303 | #define elf_backend_reloc_type_class elf32_arm_reloc_type_class |
c178919b | 4304 | #define elf_backend_object_p elf32_arm_object_p |
e16bb312 NC |
4305 | #define elf_backend_section_flags elf32_arm_section_flags |
4306 | #define elf_backend_final_write_processing elf32_arm_final_write_processing | |
5e681ec4 | 4307 | #define elf_backend_copy_indirect_symbol elf32_arm_copy_indirect_symbol |
252b5132 | 4308 | |
5e681ec4 | 4309 | #define elf_backend_can_refcount 1 |
252b5132 RH |
4310 | #define elf_backend_can_gc_sections 1 |
4311 | #define elf_backend_plt_readonly 1 | |
4312 | #define elf_backend_want_got_plt 1 | |
4313 | #define elf_backend_want_plt_sym 0 | |
acf8aed4 | 4314 | #if !USE_REL |
b491616a AM |
4315 | #define elf_backend_rela_normal 1 |
4316 | #endif | |
252b5132 | 4317 | |
04f7c78d | 4318 | #define elf_backend_got_header_size 12 |
04f7c78d | 4319 | |
252b5132 | 4320 | #include "elf32-target.h" |
7e392df6 | 4321 |