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252b5132 | 1 | /* 32-bit ELF support for ARM |
c178919b | 2 | Copyright 1998, 1999, 2000, 2001, 2002, 2003 Free Software Foundation, Inc. |
252b5132 RH |
3 | |
4 | This file is part of BFD, the Binary File Descriptor library. | |
5 | ||
6 | This program is free software; you can redistribute it and/or modify | |
7 | it under the terms of the GNU General Public License as published by | |
8 | the Free Software Foundation; either version 2 of the License, or | |
9 | (at your option) any later version. | |
10 | ||
11 | This program is distributed in the hope that it will be useful, | |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | GNU General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU General Public License | |
17 | along with this program; if not, write to the Free Software | |
18 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ | |
19 | ||
acf8aed4 AM |
20 | #ifndef USE_REL |
21 | #define USE_REL 0 | |
22 | #endif | |
23 | ||
252b5132 RH |
24 | typedef unsigned long int insn32; |
25 | typedef unsigned short int insn16; | |
26 | ||
b34976b6 | 27 | static bfd_boolean elf32_arm_set_private_flags |
252b5132 | 28 | PARAMS ((bfd *, flagword)); |
b34976b6 | 29 | static bfd_boolean elf32_arm_copy_private_bfd_data |
252b5132 | 30 | PARAMS ((bfd *, bfd *)); |
b34976b6 | 31 | static bfd_boolean elf32_arm_merge_private_bfd_data |
252b5132 | 32 | PARAMS ((bfd *, bfd *)); |
b34976b6 | 33 | static bfd_boolean elf32_arm_print_private_bfd_data |
252b5132 | 34 | PARAMS ((bfd *, PTR)); |
f21f3fe0 | 35 | static int elf32_arm_get_symbol_type |
252b5132 RH |
36 | PARAMS (( Elf_Internal_Sym *, int)); |
37 | static struct bfd_link_hash_table *elf32_arm_link_hash_table_create | |
38 | PARAMS ((bfd *)); | |
39 | static bfd_reloc_status_type elf32_arm_final_link_relocate | |
780a67af NC |
40 | PARAMS ((reloc_howto_type *, bfd *, bfd *, asection *, bfd_byte *, |
41 | Elf_Internal_Rela *, bfd_vma, struct bfd_link_info *, asection *, | |
dc810e39 | 42 | const char *, int, struct elf_link_hash_entry *)); |
252b5132 RH |
43 | static insn32 insert_thumb_branch |
44 | PARAMS ((insn32, int)); | |
45 | static struct elf_link_hash_entry *find_thumb_glue | |
917583ad | 46 | PARAMS ((struct bfd_link_info *, const char *, bfd *)); |
252b5132 | 47 | static struct elf_link_hash_entry *find_arm_glue |
917583ad | 48 | PARAMS ((struct bfd_link_info *, const char *, bfd *)); |
ba96a88f NC |
49 | static void elf32_arm_post_process_headers |
50 | PARAMS ((bfd *, struct bfd_link_info *)); | |
bcbdc74c NC |
51 | static int elf32_arm_to_thumb_stub |
52 | PARAMS ((struct bfd_link_info *, const char *, bfd *, bfd *, asection *, | |
53 | bfd_byte *, asection *, bfd_vma, bfd_signed_vma, bfd_vma)); | |
54 | static int elf32_thumb_to_arm_stub | |
55 | PARAMS ((struct bfd_link_info *, const char *, bfd *, bfd *, asection *, | |
56 | bfd_byte *, asection *, bfd_vma, bfd_signed_vma, bfd_vma)); | |
b34976b6 | 57 | static bfd_boolean elf32_arm_relocate_section |
917583ad NC |
58 | PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *, |
59 | Elf_Internal_Rela *, Elf_Internal_Sym *, asection **)); | |
60 | static asection * elf32_arm_gc_mark_hook | |
1e2f5b6e | 61 | PARAMS ((asection *, struct bfd_link_info *, Elf_Internal_Rela *, |
917583ad | 62 | struct elf_link_hash_entry *, Elf_Internal_Sym *)); |
b34976b6 | 63 | static bfd_boolean elf32_arm_gc_sweep_hook |
917583ad NC |
64 | PARAMS ((bfd *, struct bfd_link_info *, asection *, |
65 | const Elf_Internal_Rela *)); | |
b34976b6 | 66 | static bfd_boolean elf32_arm_check_relocs |
917583ad NC |
67 | PARAMS ((bfd *, struct bfd_link_info *, asection *, |
68 | const Elf_Internal_Rela *)); | |
b34976b6 | 69 | static bfd_boolean elf32_arm_find_nearest_line |
917583ad NC |
70 | PARAMS ((bfd *, asection *, asymbol **, bfd_vma, const char **, |
71 | const char **, unsigned int *)); | |
b34976b6 | 72 | static bfd_boolean elf32_arm_adjust_dynamic_symbol |
917583ad | 73 | PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *)); |
b34976b6 | 74 | static bfd_boolean elf32_arm_size_dynamic_sections |
917583ad | 75 | PARAMS ((bfd *, struct bfd_link_info *)); |
b34976b6 | 76 | static bfd_boolean elf32_arm_finish_dynamic_symbol |
917583ad NC |
77 | PARAMS ((bfd *, struct bfd_link_info *, struct elf_link_hash_entry *, |
78 | Elf_Internal_Sym *)); | |
b34976b6 | 79 | static bfd_boolean elf32_arm_finish_dynamic_sections |
917583ad NC |
80 | PARAMS ((bfd *, struct bfd_link_info *)); |
81 | static struct bfd_hash_entry * elf32_arm_link_hash_newfunc | |
82 | PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *)); | |
acf8aed4 | 83 | #if USE_REL |
917583ad NC |
84 | static void arm_add_to_rel |
85 | PARAMS ((bfd *, bfd_byte *, reloc_howto_type *, bfd_signed_vma)); | |
86 | #endif | |
5e681ec4 PB |
87 | static bfd_boolean allocate_dynrelocs |
88 | PARAMS ((struct elf_link_hash_entry *h, PTR inf)); | |
89 | static bfd_boolean create_got_section | |
90 | PARAMS ((bfd * dynobj, struct bfd_link_info * info)); | |
91 | static bfd_boolean elf32_arm_create_dynamic_sections | |
92 | PARAMS ((bfd * dynobj, struct bfd_link_info * info)); | |
7e392df6 NC |
93 | static enum elf_reloc_type_class elf32_arm_reloc_type_class |
94 | PARAMS ((const Elf_Internal_Rela *)); | |
c178919b NC |
95 | static bfd_boolean elf32_arm_object_p |
96 | PARAMS ((bfd *)); | |
252b5132 | 97 | |
7e392df6 NC |
98 | #ifndef ELFARM_NABI_C_INCLUDED |
99 | static void record_arm_to_thumb_glue | |
100 | PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *)); | |
101 | static void record_thumb_to_arm_glue | |
102 | PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *)); | |
b34976b6 | 103 | bfd_boolean bfd_elf32_arm_allocate_interworking_sections |
917583ad | 104 | PARAMS ((struct bfd_link_info *)); |
b34976b6 | 105 | bfd_boolean bfd_elf32_arm_get_bfd_for_interworking |
917583ad | 106 | PARAMS ((bfd *, struct bfd_link_info *)); |
b34976b6 | 107 | bfd_boolean bfd_elf32_arm_process_before_allocation |
917583ad | 108 | PARAMS ((bfd *, struct bfd_link_info *, int)); |
7e392df6 NC |
109 | #endif |
110 | ||
99e4ae17 | 111 | |
fd2ec330 | 112 | #define INTERWORK_FLAG(abfd) (elf_elfheader (abfd)->e_flags & EF_ARM_INTERWORK) |
9b485d32 | 113 | |
252b5132 RH |
114 | /* The linker script knows the section names for placement. |
115 | The entry_names are used to do simple name mangling on the stubs. | |
116 | Given a function name, and its type, the stub can be found. The | |
9b485d32 | 117 | name can be changed. The only requirement is the %s be present. */ |
252b5132 RH |
118 | #define THUMB2ARM_GLUE_SECTION_NAME ".glue_7t" |
119 | #define THUMB2ARM_GLUE_ENTRY_NAME "__%s_from_thumb" | |
120 | ||
121 | #define ARM2THUMB_GLUE_SECTION_NAME ".glue_7" | |
122 | #define ARM2THUMB_GLUE_ENTRY_NAME "__%s_from_arm" | |
123 | ||
124 | /* The name of the dynamic interpreter. This is put in the .interp | |
125 | section. */ | |
126 | #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1" | |
127 | ||
5e681ec4 PB |
128 | #ifdef FOUR_WORD_PLT |
129 | ||
130 | /* The size in bytes of the special first entry in the procedure | |
131 | linkage table. */ | |
132 | #define PLT_HEADER_SIZE 16 | |
133 | ||
252b5132 | 134 | /* The size in bytes of an entry in the procedure linkage table. */ |
24a1ba0f | 135 | #define PLT_ENTRY_SIZE 16 |
252b5132 RH |
136 | |
137 | /* The first entry in a procedure linkage table looks like | |
138 | this. It is set up so that any shared library function that is | |
59f2c4e7 | 139 | called before the relocation has been set up calls the dynamic |
9b485d32 | 140 | linker first. */ |
5e681ec4 PB |
141 | static const bfd_vma elf32_arm_plt0_entry [PLT_HEADER_SIZE / 4] = |
142 | { | |
143 | 0xe52de004, /* str lr, [sp, #-4]! */ | |
144 | 0xe59fe010, /* ldr lr, [pc, #16] */ | |
145 | 0xe08fe00e, /* add lr, pc, lr */ | |
146 | 0xe5bef008, /* ldr pc, [lr, #8]! */ | |
147 | }; | |
148 | ||
149 | /* Subsequent entries in a procedure linkage table look like | |
150 | this. */ | |
151 | static const bfd_vma elf32_arm_plt_entry [PLT_ENTRY_SIZE / 4] = | |
152 | { | |
153 | 0xe28fc600, /* add ip, pc, #NN */ | |
154 | 0xe28cca00, /* add ip, ip, #NN */ | |
155 | 0xe5bcf000, /* ldr pc, [ip, #NN]! */ | |
156 | 0x00000000, /* unused */ | |
157 | }; | |
158 | ||
159 | #else | |
160 | ||
161 | /* The size in bytes of the special first entry in the procedure | |
162 | linkage table. */ | |
163 | #define PLT_HEADER_SIZE 20 | |
164 | ||
165 | /* The size in bytes of an entry in the procedure linkage table. */ | |
166 | #define PLT_ENTRY_SIZE 12 | |
167 | ||
168 | /* The first entry in a procedure linkage table looks like | |
169 | this. It is set up so that any shared library function that is | |
170 | called before the relocation has been set up calls the dynamic | |
171 | linker first. */ | |
172 | static const bfd_vma elf32_arm_plt0_entry [PLT_HEADER_SIZE / 4] = | |
917583ad | 173 | { |
5e681ec4 PB |
174 | 0xe52de004, /* str lr, [sp, #-4]! */ |
175 | 0xe59fe004, /* ldr lr, [pc, #4] */ | |
176 | 0xe08fe00e, /* add lr, pc, lr */ | |
177 | 0xe5bef008, /* ldr pc, [lr, #8]! */ | |
178 | 0x00000000, /* &GOT[0] - . */ | |
917583ad | 179 | }; |
252b5132 RH |
180 | |
181 | /* Subsequent entries in a procedure linkage table look like | |
182 | this. */ | |
24a1ba0f | 183 | static const bfd_vma elf32_arm_plt_entry [PLT_ENTRY_SIZE / 4] = |
5e681ec4 PB |
184 | { |
185 | 0xe28fc600, /* add ip, pc, #0xNN00000 */ | |
186 | 0xe28cca00, /* add ip, ip, #0xNN000 */ | |
187 | 0xe5bcf000, /* ldr pc, [ip, #0xNNN]! */ | |
188 | }; | |
189 | ||
190 | #endif | |
252b5132 | 191 | |
252b5132 RH |
192 | /* The ARM linker needs to keep track of the number of relocs that it |
193 | decides to copy in check_relocs for each symbol. This is so that | |
194 | it can discard PC relative relocs if it doesn't need them when | |
195 | linking with -Bsymbolic. We store the information in a field | |
196 | extending the regular ELF linker hash table. */ | |
197 | ||
198 | /* This structure keeps track of the number of PC relative relocs we | |
199 | have copied for a given symbol. */ | |
5e681ec4 | 200 | struct elf32_arm_relocs_copied |
917583ad NC |
201 | { |
202 | /* Next section. */ | |
5e681ec4 | 203 | struct elf32_arm_relocs_copied * next; |
917583ad NC |
204 | /* A section in dynobj. */ |
205 | asection * section; | |
206 | /* Number of relocs copied in this section. */ | |
207 | bfd_size_type count; | |
208 | }; | |
252b5132 | 209 | |
ba96a88f | 210 | /* Arm ELF linker hash entry. */ |
252b5132 | 211 | struct elf32_arm_link_hash_entry |
917583ad NC |
212 | { |
213 | struct elf_link_hash_entry root; | |
252b5132 | 214 | |
917583ad | 215 | /* Number of PC relative relocs copied for this symbol. */ |
5e681ec4 | 216 | struct elf32_arm_relocs_copied * relocs_copied; |
917583ad | 217 | }; |
252b5132 | 218 | |
252b5132 | 219 | /* Traverse an arm ELF linker hash table. */ |
252b5132 RH |
220 | #define elf32_arm_link_hash_traverse(table, func, info) \ |
221 | (elf_link_hash_traverse \ | |
222 | (&(table)->root, \ | |
b34976b6 | 223 | (bfd_boolean (*) PARAMS ((struct elf_link_hash_entry *, PTR))) (func), \ |
252b5132 RH |
224 | (info))) |
225 | ||
226 | /* Get the ARM elf linker hash table from a link_info structure. */ | |
227 | #define elf32_arm_hash_table(info) \ | |
228 | ((struct elf32_arm_link_hash_table *) ((info)->hash)) | |
229 | ||
9b485d32 | 230 | /* ARM ELF linker hash table. */ |
252b5132 | 231 | struct elf32_arm_link_hash_table |
917583ad NC |
232 | { |
233 | /* The main hash table. */ | |
234 | struct elf_link_hash_table root; | |
252b5132 | 235 | |
4cc11e76 | 236 | /* The size in bytes of the section containing the Thumb-to-ARM glue. */ |
dc810e39 | 237 | bfd_size_type thumb_glue_size; |
252b5132 | 238 | |
4cc11e76 | 239 | /* The size in bytes of the section containing the ARM-to-Thumb glue. */ |
dc810e39 | 240 | bfd_size_type arm_glue_size; |
252b5132 | 241 | |
4cc11e76 | 242 | /* An arbitrary input BFD chosen to hold the glue sections. */ |
917583ad | 243 | bfd * bfd_of_glue_owner; |
ba96a88f | 244 | |
917583ad NC |
245 | /* A boolean indicating whether knowledge of the ARM's pipeline |
246 | length should be applied by the linker. */ | |
247 | int no_pipeline_knowledge; | |
5e681ec4 PB |
248 | |
249 | /* Short-cuts to get to dynamic linker sections. */ | |
250 | asection *sgot; | |
251 | asection *sgotplt; | |
252 | asection *srelgot; | |
253 | asection *splt; | |
254 | asection *srelplt; | |
255 | asection *sdynbss; | |
256 | asection *srelbss; | |
257 | ||
258 | /* Small local sym to section mapping cache. */ | |
259 | struct sym_sec_cache sym_sec; | |
917583ad | 260 | }; |
252b5132 | 261 | |
780a67af NC |
262 | /* Create an entry in an ARM ELF linker hash table. */ |
263 | ||
264 | static struct bfd_hash_entry * | |
265 | elf32_arm_link_hash_newfunc (entry, table, string) | |
266 | struct bfd_hash_entry * entry; | |
267 | struct bfd_hash_table * table; | |
268 | const char * string; | |
269 | { | |
270 | struct elf32_arm_link_hash_entry * ret = | |
271 | (struct elf32_arm_link_hash_entry *) entry; | |
272 | ||
273 | /* Allocate the structure if it has not already been allocated by a | |
274 | subclass. */ | |
275 | if (ret == (struct elf32_arm_link_hash_entry *) NULL) | |
276 | ret = ((struct elf32_arm_link_hash_entry *) | |
277 | bfd_hash_allocate (table, | |
278 | sizeof (struct elf32_arm_link_hash_entry))); | |
279 | if (ret == (struct elf32_arm_link_hash_entry *) NULL) | |
280 | return (struct bfd_hash_entry *) ret; | |
281 | ||
282 | /* Call the allocation method of the superclass. */ | |
283 | ret = ((struct elf32_arm_link_hash_entry *) | |
284 | _bfd_elf_link_hash_newfunc ((struct bfd_hash_entry *) ret, | |
285 | table, string)); | |
286 | if (ret != (struct elf32_arm_link_hash_entry *) NULL) | |
5e681ec4 | 287 | ret->relocs_copied = NULL; |
780a67af NC |
288 | |
289 | return (struct bfd_hash_entry *) ret; | |
290 | } | |
291 | ||
5e681ec4 PB |
292 | /* Create .got, .gotplt, and .rel.got sections in DYNOBJ, and set up |
293 | shortcuts to them in our hash table. */ | |
294 | ||
295 | static bfd_boolean | |
296 | create_got_section (dynobj, info) | |
297 | bfd *dynobj; | |
298 | struct bfd_link_info *info; | |
299 | { | |
300 | struct elf32_arm_link_hash_table *htab; | |
301 | ||
302 | if (! _bfd_elf_create_got_section (dynobj, info)) | |
303 | return FALSE; | |
304 | ||
305 | htab = elf32_arm_hash_table (info); | |
306 | htab->sgot = bfd_get_section_by_name (dynobj, ".got"); | |
307 | htab->sgotplt = bfd_get_section_by_name (dynobj, ".got.plt"); | |
308 | if (!htab->sgot || !htab->sgotplt) | |
309 | abort (); | |
310 | ||
311 | htab->srelgot = bfd_make_section (dynobj, ".rel.got"); | |
312 | if (htab->srelgot == NULL | |
313 | || ! bfd_set_section_flags (dynobj, htab->srelgot, | |
314 | (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | |
315 | | SEC_IN_MEMORY | SEC_LINKER_CREATED | |
316 | | SEC_READONLY)) | |
317 | || ! bfd_set_section_alignment (dynobj, htab->srelgot, 2)) | |
318 | return FALSE; | |
319 | return TRUE; | |
320 | } | |
321 | ||
322 | /* Create .plt, .rel.plt, .got, .got.plt, .rel.got, .dynbss, and | |
323 | .rel.bss sections in DYNOBJ, and set up shortcuts to them in our | |
324 | hash table. */ | |
325 | ||
326 | static bfd_boolean | |
327 | elf32_arm_create_dynamic_sections (dynobj, info) | |
328 | bfd *dynobj; | |
329 | struct bfd_link_info *info; | |
330 | { | |
331 | struct elf32_arm_link_hash_table *htab; | |
332 | ||
333 | htab = elf32_arm_hash_table (info); | |
334 | if (!htab->sgot && !create_got_section (dynobj, info)) | |
335 | return FALSE; | |
336 | ||
337 | if (!_bfd_elf_create_dynamic_sections (dynobj, info)) | |
338 | return FALSE; | |
339 | ||
340 | htab->splt = bfd_get_section_by_name (dynobj, ".plt"); | |
341 | htab->srelplt = bfd_get_section_by_name (dynobj, ".rel.plt"); | |
342 | htab->sdynbss = bfd_get_section_by_name (dynobj, ".dynbss"); | |
343 | if (!info->shared) | |
344 | htab->srelbss = bfd_get_section_by_name (dynobj, ".rel.bss"); | |
345 | ||
346 | if (!htab->splt || !htab->srelplt || !htab->sdynbss | |
347 | || (!info->shared && !htab->srelbss)) | |
348 | abort (); | |
349 | ||
350 | return TRUE; | |
351 | } | |
352 | ||
353 | /* Copy the extra info we tack onto an elf_link_hash_entry. */ | |
354 | ||
355 | static void | |
356 | elf32_arm_copy_indirect_symbol (const struct elf_backend_data *bed, | |
357 | struct elf_link_hash_entry *dir, | |
358 | struct elf_link_hash_entry *ind) | |
359 | { | |
360 | struct elf32_arm_link_hash_entry *edir, *eind; | |
361 | ||
362 | edir = (struct elf32_arm_link_hash_entry *) dir; | |
363 | eind = (struct elf32_arm_link_hash_entry *) ind; | |
364 | ||
365 | if (eind->relocs_copied != NULL) | |
366 | { | |
367 | if (edir->relocs_copied != NULL) | |
368 | { | |
369 | struct elf32_arm_relocs_copied **pp; | |
370 | struct elf32_arm_relocs_copied *p; | |
371 | ||
372 | if (ind->root.type == bfd_link_hash_indirect) | |
373 | abort (); | |
374 | ||
375 | /* Add reloc counts against the weak sym to the strong sym | |
376 | list. Merge any entries against the same section. */ | |
377 | for (pp = &eind->relocs_copied; (p = *pp) != NULL; ) | |
378 | { | |
379 | struct elf32_arm_relocs_copied *q; | |
380 | ||
381 | for (q = edir->relocs_copied; q != NULL; q = q->next) | |
382 | if (q->section == p->section) | |
383 | { | |
5e681ec4 PB |
384 | q->count += p->count; |
385 | *pp = p->next; | |
386 | break; | |
387 | } | |
388 | if (q == NULL) | |
389 | pp = &p->next; | |
390 | } | |
391 | *pp = edir->relocs_copied; | |
392 | } | |
393 | ||
394 | edir->relocs_copied = eind->relocs_copied; | |
395 | eind->relocs_copied = NULL; | |
396 | } | |
397 | ||
398 | _bfd_elf_link_hash_copy_indirect (bed, dir, ind); | |
399 | } | |
400 | ||
9b485d32 | 401 | /* Create an ARM elf linker hash table. */ |
252b5132 RH |
402 | |
403 | static struct bfd_link_hash_table * | |
404 | elf32_arm_link_hash_table_create (abfd) | |
405 | bfd *abfd; | |
406 | { | |
407 | struct elf32_arm_link_hash_table *ret; | |
dc810e39 | 408 | bfd_size_type amt = sizeof (struct elf32_arm_link_hash_table); |
252b5132 | 409 | |
e2d34d7d | 410 | ret = (struct elf32_arm_link_hash_table *) bfd_malloc (amt); |
252b5132 RH |
411 | if (ret == (struct elf32_arm_link_hash_table *) NULL) |
412 | return NULL; | |
413 | ||
414 | if (!_bfd_elf_link_hash_table_init (&ret->root, abfd, | |
780a67af | 415 | elf32_arm_link_hash_newfunc)) |
252b5132 | 416 | { |
e2d34d7d | 417 | free (ret); |
252b5132 RH |
418 | return NULL; |
419 | } | |
420 | ||
5e681ec4 PB |
421 | ret->sgot = NULL; |
422 | ret->sgotplt = NULL; | |
423 | ret->srelgot = NULL; | |
424 | ret->splt = NULL; | |
425 | ret->srelplt = NULL; | |
426 | ret->sdynbss = NULL; | |
427 | ret->srelbss = NULL; | |
252b5132 RH |
428 | ret->thumb_glue_size = 0; |
429 | ret->arm_glue_size = 0; | |
430 | ret->bfd_of_glue_owner = NULL; | |
ba96a88f | 431 | ret->no_pipeline_knowledge = 0; |
5e681ec4 | 432 | ret->sym_sec.abfd = NULL; |
252b5132 RH |
433 | |
434 | return &ret->root.root; | |
435 | } | |
436 | ||
9b485d32 NC |
437 | /* Locate the Thumb encoded calling stub for NAME. */ |
438 | ||
252b5132 RH |
439 | static struct elf_link_hash_entry * |
440 | find_thumb_glue (link_info, name, input_bfd) | |
441 | struct bfd_link_info *link_info; | |
917583ad | 442 | const char *name; |
252b5132 RH |
443 | bfd *input_bfd; |
444 | { | |
445 | char *tmp_name; | |
446 | struct elf_link_hash_entry *hash; | |
447 | struct elf32_arm_link_hash_table *hash_table; | |
448 | ||
449 | /* We need a pointer to the armelf specific hash table. */ | |
450 | hash_table = elf32_arm_hash_table (link_info); | |
451 | ||
dc810e39 AM |
452 | tmp_name = (char *) bfd_malloc ((bfd_size_type) strlen (name) |
453 | + strlen (THUMB2ARM_GLUE_ENTRY_NAME) + 1); | |
252b5132 RH |
454 | |
455 | BFD_ASSERT (tmp_name); | |
456 | ||
457 | sprintf (tmp_name, THUMB2ARM_GLUE_ENTRY_NAME, name); | |
458 | ||
459 | hash = elf_link_hash_lookup | |
b34976b6 | 460 | (&(hash_table)->root, tmp_name, FALSE, FALSE, TRUE); |
252b5132 RH |
461 | |
462 | if (hash == NULL) | |
463 | /* xgettext:c-format */ | |
8f615d07 AM |
464 | (*_bfd_error_handler) (_("%s: unable to find THUMB glue '%s' for `%s'"), |
465 | bfd_archive_filename (input_bfd), tmp_name, name); | |
252b5132 RH |
466 | |
467 | free (tmp_name); | |
468 | ||
469 | return hash; | |
470 | } | |
471 | ||
9b485d32 NC |
472 | /* Locate the ARM encoded calling stub for NAME. */ |
473 | ||
252b5132 RH |
474 | static struct elf_link_hash_entry * |
475 | find_arm_glue (link_info, name, input_bfd) | |
476 | struct bfd_link_info *link_info; | |
917583ad | 477 | const char *name; |
252b5132 RH |
478 | bfd *input_bfd; |
479 | { | |
480 | char *tmp_name; | |
481 | struct elf_link_hash_entry *myh; | |
482 | struct elf32_arm_link_hash_table *hash_table; | |
483 | ||
484 | /* We need a pointer to the elfarm specific hash table. */ | |
485 | hash_table = elf32_arm_hash_table (link_info); | |
486 | ||
dc810e39 AM |
487 | tmp_name = (char *) bfd_malloc ((bfd_size_type) strlen (name) |
488 | + strlen (ARM2THUMB_GLUE_ENTRY_NAME) + 1); | |
252b5132 RH |
489 | |
490 | BFD_ASSERT (tmp_name); | |
491 | ||
492 | sprintf (tmp_name, ARM2THUMB_GLUE_ENTRY_NAME, name); | |
493 | ||
494 | myh = elf_link_hash_lookup | |
b34976b6 | 495 | (&(hash_table)->root, tmp_name, FALSE, FALSE, TRUE); |
252b5132 RH |
496 | |
497 | if (myh == NULL) | |
498 | /* xgettext:c-format */ | |
8f615d07 AM |
499 | (*_bfd_error_handler) (_("%s: unable to find ARM glue '%s' for `%s'"), |
500 | bfd_archive_filename (input_bfd), tmp_name, name); | |
252b5132 RH |
501 | |
502 | free (tmp_name); | |
503 | ||
504 | return myh; | |
505 | } | |
506 | ||
9b485d32 | 507 | /* ARM->Thumb glue: |
252b5132 RH |
508 | |
509 | .arm | |
510 | __func_from_arm: | |
511 | ldr r12, __func_addr | |
512 | bx r12 | |
513 | __func_addr: | |
9b485d32 | 514 | .word func @ behave as if you saw a ARM_32 reloc. */ |
252b5132 RH |
515 | |
516 | #define ARM2THUMB_GLUE_SIZE 12 | |
517 | static const insn32 a2t1_ldr_insn = 0xe59fc000; | |
518 | static const insn32 a2t2_bx_r12_insn = 0xe12fff1c; | |
519 | static const insn32 a2t3_func_addr_insn = 0x00000001; | |
520 | ||
9b485d32 | 521 | /* Thumb->ARM: Thumb->(non-interworking aware) ARM |
252b5132 RH |
522 | |
523 | .thumb .thumb | |
524 | .align 2 .align 2 | |
525 | __func_from_thumb: __func_from_thumb: | |
526 | bx pc push {r6, lr} | |
527 | nop ldr r6, __func_addr | |
528 | .arm mov lr, pc | |
529 | __func_change_to_arm: bx r6 | |
530 | b func .arm | |
531 | __func_back_to_thumb: | |
532 | ldmia r13! {r6, lr} | |
533 | bx lr | |
534 | __func_addr: | |
9b485d32 | 535 | .word func */ |
252b5132 RH |
536 | |
537 | #define THUMB2ARM_GLUE_SIZE 8 | |
538 | static const insn16 t2a1_bx_pc_insn = 0x4778; | |
539 | static const insn16 t2a2_noop_insn = 0x46c0; | |
540 | static const insn32 t2a3_b_insn = 0xea000000; | |
541 | ||
7e392df6 | 542 | #ifndef ELFARM_NABI_C_INCLUDED |
b34976b6 | 543 | bfd_boolean |
252b5132 RH |
544 | bfd_elf32_arm_allocate_interworking_sections (info) |
545 | struct bfd_link_info * info; | |
546 | { | |
547 | asection * s; | |
548 | bfd_byte * foo; | |
549 | struct elf32_arm_link_hash_table * globals; | |
550 | ||
551 | globals = elf32_arm_hash_table (info); | |
552 | ||
553 | BFD_ASSERT (globals != NULL); | |
554 | ||
555 | if (globals->arm_glue_size != 0) | |
556 | { | |
557 | BFD_ASSERT (globals->bfd_of_glue_owner != NULL); | |
558 | ||
dc810e39 AM |
559 | s = bfd_get_section_by_name (globals->bfd_of_glue_owner, |
560 | ARM2THUMB_GLUE_SECTION_NAME); | |
252b5132 RH |
561 | |
562 | BFD_ASSERT (s != NULL); | |
563 | ||
dc810e39 AM |
564 | foo = (bfd_byte *) bfd_alloc (globals->bfd_of_glue_owner, |
565 | globals->arm_glue_size); | |
252b5132 RH |
566 | |
567 | s->_raw_size = s->_cooked_size = globals->arm_glue_size; | |
568 | s->contents = foo; | |
569 | } | |
570 | ||
571 | if (globals->thumb_glue_size != 0) | |
572 | { | |
573 | BFD_ASSERT (globals->bfd_of_glue_owner != NULL); | |
574 | ||
575 | s = bfd_get_section_by_name | |
576 | (globals->bfd_of_glue_owner, THUMB2ARM_GLUE_SECTION_NAME); | |
577 | ||
578 | BFD_ASSERT (s != NULL); | |
579 | ||
dc810e39 AM |
580 | foo = (bfd_byte *) bfd_alloc (globals->bfd_of_glue_owner, |
581 | globals->thumb_glue_size); | |
252b5132 RH |
582 | |
583 | s->_raw_size = s->_cooked_size = globals->thumb_glue_size; | |
584 | s->contents = foo; | |
585 | } | |
586 | ||
b34976b6 | 587 | return TRUE; |
252b5132 RH |
588 | } |
589 | ||
590 | static void | |
591 | record_arm_to_thumb_glue (link_info, h) | |
592 | struct bfd_link_info * link_info; | |
593 | struct elf_link_hash_entry * h; | |
594 | { | |
595 | const char * name = h->root.root.string; | |
63b0f745 | 596 | asection * s; |
252b5132 RH |
597 | char * tmp_name; |
598 | struct elf_link_hash_entry * myh; | |
14a793b2 | 599 | struct bfd_link_hash_entry * bh; |
252b5132 | 600 | struct elf32_arm_link_hash_table * globals; |
dc810e39 | 601 | bfd_vma val; |
252b5132 RH |
602 | |
603 | globals = elf32_arm_hash_table (link_info); | |
604 | ||
605 | BFD_ASSERT (globals != NULL); | |
606 | BFD_ASSERT (globals->bfd_of_glue_owner != NULL); | |
607 | ||
608 | s = bfd_get_section_by_name | |
609 | (globals->bfd_of_glue_owner, ARM2THUMB_GLUE_SECTION_NAME); | |
610 | ||
252b5132 RH |
611 | BFD_ASSERT (s != NULL); |
612 | ||
dc810e39 AM |
613 | tmp_name = (char *) bfd_malloc ((bfd_size_type) strlen (name) |
614 | + strlen (ARM2THUMB_GLUE_ENTRY_NAME) + 1); | |
252b5132 RH |
615 | |
616 | BFD_ASSERT (tmp_name); | |
617 | ||
618 | sprintf (tmp_name, ARM2THUMB_GLUE_ENTRY_NAME, name); | |
619 | ||
620 | myh = elf_link_hash_lookup | |
b34976b6 | 621 | (&(globals)->root, tmp_name, FALSE, FALSE, TRUE); |
252b5132 RH |
622 | |
623 | if (myh != NULL) | |
624 | { | |
9b485d32 | 625 | /* We've already seen this guy. */ |
252b5132 | 626 | free (tmp_name); |
9b485d32 | 627 | return; |
252b5132 RH |
628 | } |
629 | ||
630 | /* The only trick here is using hash_table->arm_glue_size as the value. Even | |
631 | though the section isn't allocated yet, this is where we will be putting | |
632 | it. */ | |
14a793b2 | 633 | bh = NULL; |
dc810e39 AM |
634 | val = globals->arm_glue_size + 1; |
635 | _bfd_generic_link_add_one_symbol (link_info, globals->bfd_of_glue_owner, | |
636 | tmp_name, BSF_GLOBAL, s, val, | |
b34976b6 | 637 | NULL, TRUE, FALSE, &bh); |
252b5132 RH |
638 | |
639 | free (tmp_name); | |
640 | ||
641 | globals->arm_glue_size += ARM2THUMB_GLUE_SIZE; | |
642 | ||
643 | return; | |
644 | } | |
645 | ||
646 | static void | |
647 | record_thumb_to_arm_glue (link_info, h) | |
648 | struct bfd_link_info *link_info; | |
649 | struct elf_link_hash_entry *h; | |
650 | { | |
651 | const char *name = h->root.root.string; | |
63b0f745 | 652 | asection *s; |
252b5132 RH |
653 | char *tmp_name; |
654 | struct elf_link_hash_entry *myh; | |
14a793b2 | 655 | struct bfd_link_hash_entry *bh; |
252b5132 RH |
656 | struct elf32_arm_link_hash_table *hash_table; |
657 | char bind; | |
dc810e39 | 658 | bfd_vma val; |
252b5132 RH |
659 | |
660 | hash_table = elf32_arm_hash_table (link_info); | |
661 | ||
662 | BFD_ASSERT (hash_table != NULL); | |
663 | BFD_ASSERT (hash_table->bfd_of_glue_owner != NULL); | |
664 | ||
665 | s = bfd_get_section_by_name | |
666 | (hash_table->bfd_of_glue_owner, THUMB2ARM_GLUE_SECTION_NAME); | |
667 | ||
668 | BFD_ASSERT (s != NULL); | |
669 | ||
dc810e39 AM |
670 | tmp_name = (char *) bfd_malloc ((bfd_size_type) strlen (name) |
671 | + strlen (THUMB2ARM_GLUE_ENTRY_NAME) + 1); | |
252b5132 RH |
672 | |
673 | BFD_ASSERT (tmp_name); | |
674 | ||
675 | sprintf (tmp_name, THUMB2ARM_GLUE_ENTRY_NAME, name); | |
676 | ||
677 | myh = elf_link_hash_lookup | |
b34976b6 | 678 | (&(hash_table)->root, tmp_name, FALSE, FALSE, TRUE); |
252b5132 RH |
679 | |
680 | if (myh != NULL) | |
681 | { | |
9b485d32 | 682 | /* We've already seen this guy. */ |
252b5132 | 683 | free (tmp_name); |
9b485d32 | 684 | return; |
252b5132 RH |
685 | } |
686 | ||
14a793b2 | 687 | bh = NULL; |
dc810e39 AM |
688 | val = hash_table->thumb_glue_size + 1; |
689 | _bfd_generic_link_add_one_symbol (link_info, hash_table->bfd_of_glue_owner, | |
690 | tmp_name, BSF_GLOBAL, s, val, | |
b34976b6 | 691 | NULL, TRUE, FALSE, &bh); |
252b5132 | 692 | |
9b485d32 | 693 | /* If we mark it 'Thumb', the disassembler will do a better job. */ |
14a793b2 | 694 | myh = (struct elf_link_hash_entry *) bh; |
252b5132 RH |
695 | bind = ELF_ST_BIND (myh->type); |
696 | myh->type = ELF_ST_INFO (bind, STT_ARM_TFUNC); | |
697 | ||
698 | free (tmp_name); | |
699 | ||
252b5132 RH |
700 | #define CHANGE_TO_ARM "__%s_change_to_arm" |
701 | #define BACK_FROM_ARM "__%s_back_from_arm" | |
702 | ||
9b485d32 | 703 | /* Allocate another symbol to mark where we switch to Arm mode. */ |
dc810e39 AM |
704 | tmp_name = (char *) bfd_malloc ((bfd_size_type) strlen (name) |
705 | + strlen (CHANGE_TO_ARM) + 1); | |
252b5132 RH |
706 | |
707 | BFD_ASSERT (tmp_name); | |
708 | ||
709 | sprintf (tmp_name, CHANGE_TO_ARM, name); | |
710 | ||
14a793b2 | 711 | bh = NULL; |
dc810e39 AM |
712 | val = hash_table->thumb_glue_size + 4, |
713 | _bfd_generic_link_add_one_symbol (link_info, hash_table->bfd_of_glue_owner, | |
714 | tmp_name, BSF_LOCAL, s, val, | |
b34976b6 | 715 | NULL, TRUE, FALSE, &bh); |
252b5132 RH |
716 | |
717 | free (tmp_name); | |
718 | ||
719 | hash_table->thumb_glue_size += THUMB2ARM_GLUE_SIZE; | |
720 | ||
721 | return; | |
722 | } | |
723 | ||
8afb0e02 NC |
724 | /* Add the glue sections to ABFD. This function is called from the |
725 | linker scripts in ld/emultempl/{armelf}.em. */ | |
9b485d32 | 726 | |
b34976b6 | 727 | bfd_boolean |
8afb0e02 | 728 | bfd_elf32_arm_add_glue_sections_to_bfd (abfd, info) |
252b5132 RH |
729 | bfd *abfd; |
730 | struct bfd_link_info *info; | |
731 | { | |
252b5132 RH |
732 | flagword flags; |
733 | asection *sec; | |
734 | ||
8afb0e02 NC |
735 | /* If we are only performing a partial |
736 | link do not bother adding the glue. */ | |
1049f94e | 737 | if (info->relocatable) |
b34976b6 | 738 | return TRUE; |
252b5132 | 739 | |
252b5132 RH |
740 | sec = bfd_get_section_by_name (abfd, ARM2THUMB_GLUE_SECTION_NAME); |
741 | ||
742 | if (sec == NULL) | |
743 | { | |
57db232e NC |
744 | /* Note: we do not include the flag SEC_LINKER_CREATED, as this |
745 | will prevent elf_link_input_bfd() from processing the contents | |
746 | of this section. */ | |
811b4bf6 | 747 | flags = SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_CODE | SEC_READONLY; |
252b5132 RH |
748 | |
749 | sec = bfd_make_section (abfd, ARM2THUMB_GLUE_SECTION_NAME); | |
750 | ||
751 | if (sec == NULL | |
752 | || !bfd_set_section_flags (abfd, sec, flags) | |
753 | || !bfd_set_section_alignment (abfd, sec, 2)) | |
b34976b6 | 754 | return FALSE; |
9a5aca8c | 755 | |
57db232e NC |
756 | /* Set the gc mark to prevent the section from being removed by garbage |
757 | collection, despite the fact that no relocs refer to this section. */ | |
758 | sec->gc_mark = 1; | |
252b5132 RH |
759 | } |
760 | ||
761 | sec = bfd_get_section_by_name (abfd, THUMB2ARM_GLUE_SECTION_NAME); | |
762 | ||
763 | if (sec == NULL) | |
764 | { | |
811b4bf6 | 765 | flags = SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_CODE | SEC_READONLY; |
252b5132 RH |
766 | |
767 | sec = bfd_make_section (abfd, THUMB2ARM_GLUE_SECTION_NAME); | |
768 | ||
769 | if (sec == NULL | |
770 | || !bfd_set_section_flags (abfd, sec, flags) | |
771 | || !bfd_set_section_alignment (abfd, sec, 2)) | |
b34976b6 | 772 | return FALSE; |
9a5aca8c | 773 | |
57db232e | 774 | sec->gc_mark = 1; |
252b5132 RH |
775 | } |
776 | ||
b34976b6 | 777 | return TRUE; |
8afb0e02 NC |
778 | } |
779 | ||
780 | /* Select a BFD to be used to hold the sections used by the glue code. | |
781 | This function is called from the linker scripts in ld/emultempl/ | |
782 | {armelf/pe}.em */ | |
783 | ||
b34976b6 | 784 | bfd_boolean |
8afb0e02 NC |
785 | bfd_elf32_arm_get_bfd_for_interworking (abfd, info) |
786 | bfd *abfd; | |
787 | struct bfd_link_info *info; | |
788 | { | |
789 | struct elf32_arm_link_hash_table *globals; | |
790 | ||
791 | /* If we are only performing a partial link | |
792 | do not bother getting a bfd to hold the glue. */ | |
1049f94e | 793 | if (info->relocatable) |
b34976b6 | 794 | return TRUE; |
8afb0e02 NC |
795 | |
796 | globals = elf32_arm_hash_table (info); | |
797 | ||
798 | BFD_ASSERT (globals != NULL); | |
799 | ||
800 | if (globals->bfd_of_glue_owner != NULL) | |
b34976b6 | 801 | return TRUE; |
8afb0e02 | 802 | |
252b5132 RH |
803 | /* Save the bfd for later use. */ |
804 | globals->bfd_of_glue_owner = abfd; | |
cedb70c5 | 805 | |
b34976b6 | 806 | return TRUE; |
252b5132 RH |
807 | } |
808 | ||
b34976b6 | 809 | bfd_boolean |
ba96a88f | 810 | bfd_elf32_arm_process_before_allocation (abfd, link_info, no_pipeline_knowledge) |
252b5132 RH |
811 | bfd *abfd; |
812 | struct bfd_link_info *link_info; | |
ba96a88f | 813 | int no_pipeline_knowledge; |
252b5132 RH |
814 | { |
815 | Elf_Internal_Shdr *symtab_hdr; | |
6cdc0ccc | 816 | Elf_Internal_Rela *internal_relocs = NULL; |
252b5132 RH |
817 | Elf_Internal_Rela *irel, *irelend; |
818 | bfd_byte *contents = NULL; | |
252b5132 RH |
819 | |
820 | asection *sec; | |
821 | struct elf32_arm_link_hash_table *globals; | |
822 | ||
823 | /* If we are only performing a partial link do not bother | |
824 | to construct any glue. */ | |
1049f94e | 825 | if (link_info->relocatable) |
b34976b6 | 826 | return TRUE; |
252b5132 RH |
827 | |
828 | /* Here we have a bfd that is to be included on the link. We have a hook | |
829 | to do reloc rummaging, before section sizes are nailed down. */ | |
252b5132 RH |
830 | globals = elf32_arm_hash_table (link_info); |
831 | ||
832 | BFD_ASSERT (globals != NULL); | |
833 | BFD_ASSERT (globals->bfd_of_glue_owner != NULL); | |
834 | ||
ba96a88f | 835 | globals->no_pipeline_knowledge = no_pipeline_knowledge; |
f21f3fe0 | 836 | |
252b5132 RH |
837 | /* Rummage around all the relocs and map the glue vectors. */ |
838 | sec = abfd->sections; | |
839 | ||
840 | if (sec == NULL) | |
b34976b6 | 841 | return TRUE; |
252b5132 RH |
842 | |
843 | for (; sec != NULL; sec = sec->next) | |
844 | { | |
845 | if (sec->reloc_count == 0) | |
846 | continue; | |
847 | ||
848 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
252b5132 | 849 | |
9b485d32 | 850 | /* Load the relocs. */ |
6cdc0ccc | 851 | internal_relocs |
45d6a902 AM |
852 | = _bfd_elf_link_read_relocs (abfd, sec, (PTR) NULL, |
853 | (Elf_Internal_Rela *) NULL, FALSE); | |
252b5132 | 854 | |
6cdc0ccc AM |
855 | if (internal_relocs == NULL) |
856 | goto error_return; | |
252b5132 | 857 | |
6cdc0ccc AM |
858 | irelend = internal_relocs + sec->reloc_count; |
859 | for (irel = internal_relocs; irel < irelend; irel++) | |
252b5132 RH |
860 | { |
861 | long r_type; | |
862 | unsigned long r_index; | |
252b5132 RH |
863 | |
864 | struct elf_link_hash_entry *h; | |
865 | ||
866 | r_type = ELF32_R_TYPE (irel->r_info); | |
867 | r_index = ELF32_R_SYM (irel->r_info); | |
868 | ||
9b485d32 | 869 | /* These are the only relocation types we care about. */ |
ba96a88f | 870 | if ( r_type != R_ARM_PC24 |
252b5132 RH |
871 | && r_type != R_ARM_THM_PC22) |
872 | continue; | |
873 | ||
874 | /* Get the section contents if we haven't done so already. */ | |
875 | if (contents == NULL) | |
876 | { | |
877 | /* Get cached copy if it exists. */ | |
878 | if (elf_section_data (sec)->this_hdr.contents != NULL) | |
879 | contents = elf_section_data (sec)->this_hdr.contents; | |
880 | else | |
881 | { | |
882 | /* Go get them off disk. */ | |
883 | contents = (bfd_byte *) bfd_malloc (sec->_raw_size); | |
884 | if (contents == NULL) | |
885 | goto error_return; | |
9b485d32 | 886 | |
252b5132 | 887 | if (!bfd_get_section_contents (abfd, sec, contents, |
dc810e39 | 888 | (file_ptr) 0, sec->_raw_size)) |
252b5132 RH |
889 | goto error_return; |
890 | } | |
891 | } | |
892 | ||
a7c10850 | 893 | /* If the relocation is not against a symbol it cannot concern us. */ |
252b5132 RH |
894 | h = NULL; |
895 | ||
9b485d32 | 896 | /* We don't care about local symbols. */ |
252b5132 RH |
897 | if (r_index < symtab_hdr->sh_info) |
898 | continue; | |
899 | ||
9b485d32 | 900 | /* This is an external symbol. */ |
252b5132 RH |
901 | r_index -= symtab_hdr->sh_info; |
902 | h = (struct elf_link_hash_entry *) | |
903 | elf_sym_hashes (abfd)[r_index]; | |
904 | ||
905 | /* If the relocation is against a static symbol it must be within | |
906 | the current section and so cannot be a cross ARM/Thumb relocation. */ | |
907 | if (h == NULL) | |
908 | continue; | |
909 | ||
910 | switch (r_type) | |
911 | { | |
912 | case R_ARM_PC24: | |
913 | /* This one is a call from arm code. We need to look up | |
2f0ca46a | 914 | the target of the call. If it is a thumb target, we |
252b5132 | 915 | insert glue. */ |
252b5132 RH |
916 | if (ELF_ST_TYPE(h->type) == STT_ARM_TFUNC) |
917 | record_arm_to_thumb_glue (link_info, h); | |
918 | break; | |
919 | ||
920 | case R_ARM_THM_PC22: | |
f21f3fe0 | 921 | /* This one is a call from thumb code. We look |
2f0ca46a | 922 | up the target of the call. If it is not a thumb |
bcbdc74c | 923 | target, we insert glue. */ |
252b5132 RH |
924 | if (ELF_ST_TYPE (h->type) != STT_ARM_TFUNC) |
925 | record_thumb_to_arm_glue (link_info, h); | |
926 | break; | |
927 | ||
928 | default: | |
929 | break; | |
930 | } | |
931 | } | |
6cdc0ccc AM |
932 | |
933 | if (contents != NULL | |
934 | && elf_section_data (sec)->this_hdr.contents != contents) | |
935 | free (contents); | |
936 | contents = NULL; | |
937 | ||
938 | if (internal_relocs != NULL | |
939 | && elf_section_data (sec)->relocs != internal_relocs) | |
940 | free (internal_relocs); | |
941 | internal_relocs = NULL; | |
252b5132 RH |
942 | } |
943 | ||
b34976b6 | 944 | return TRUE; |
9a5aca8c | 945 | |
252b5132 | 946 | error_return: |
6cdc0ccc AM |
947 | if (contents != NULL |
948 | && elf_section_data (sec)->this_hdr.contents != contents) | |
949 | free (contents); | |
950 | if (internal_relocs != NULL | |
951 | && elf_section_data (sec)->relocs != internal_relocs) | |
952 | free (internal_relocs); | |
9a5aca8c | 953 | |
b34976b6 | 954 | return FALSE; |
252b5132 | 955 | } |
7e392df6 | 956 | #endif |
252b5132 RH |
957 | |
958 | /* The thumb form of a long branch is a bit finicky, because the offset | |
959 | encoding is split over two fields, each in it's own instruction. They | |
f21f3fe0 | 960 | can occur in any order. So given a thumb form of long branch, and an |
252b5132 | 961 | offset, insert the offset into the thumb branch and return finished |
f21f3fe0 | 962 | instruction. |
252b5132 | 963 | |
f21f3fe0 | 964 | It takes two thumb instructions to encode the target address. Each has |
4cc11e76 | 965 | 11 bits to invest. The upper 11 bits are stored in one (identified by |
f21f3fe0 UD |
966 | H-0.. see below), the lower 11 bits are stored in the other (identified |
967 | by H-1). | |
252b5132 | 968 | |
f21f3fe0 | 969 | Combine together and shifted left by 1 (it's a half word address) and |
252b5132 RH |
970 | there you have it. |
971 | ||
972 | Op: 1111 = F, | |
973 | H-0, upper address-0 = 000 | |
974 | Op: 1111 = F, | |
975 | H-1, lower address-0 = 800 | |
976 | ||
f21f3fe0 | 977 | They can be ordered either way, but the arm tools I've seen always put |
252b5132 RH |
978 | the lower one first. It probably doesn't matter. krk@cygnus.com |
979 | ||
980 | XXX: Actually the order does matter. The second instruction (H-1) | |
981 | moves the computed address into the PC, so it must be the second one | |
982 | in the sequence. The problem, however is that whilst little endian code | |
983 | stores the instructions in HI then LOW order, big endian code does the | |
dfc5f959 | 984 | reverse. nickc@cygnus.com. */ |
252b5132 | 985 | |
dfc5f959 NC |
986 | #define LOW_HI_ORDER 0xF800F000 |
987 | #define HI_LOW_ORDER 0xF000F800 | |
252b5132 RH |
988 | |
989 | static insn32 | |
990 | insert_thumb_branch (br_insn, rel_off) | |
991 | insn32 br_insn; | |
992 | int rel_off; | |
993 | { | |
994 | unsigned int low_bits; | |
995 | unsigned int high_bits; | |
996 | ||
252b5132 RH |
997 | BFD_ASSERT ((rel_off & 1) != 1); |
998 | ||
dfc5f959 NC |
999 | rel_off >>= 1; /* Half word aligned address. */ |
1000 | low_bits = rel_off & 0x000007FF; /* The bottom 11 bits. */ | |
1001 | high_bits = (rel_off >> 11) & 0x000007FF; /* The top 11 bits. */ | |
252b5132 RH |
1002 | |
1003 | if ((br_insn & LOW_HI_ORDER) == LOW_HI_ORDER) | |
1004 | br_insn = LOW_HI_ORDER | (low_bits << 16) | high_bits; | |
1005 | else if ((br_insn & HI_LOW_ORDER) == HI_LOW_ORDER) | |
1006 | br_insn = HI_LOW_ORDER | (high_bits << 16) | low_bits; | |
1007 | else | |
9b485d32 NC |
1008 | /* FIXME: abort is probably not the right call. krk@cygnus.com */ |
1009 | abort (); /* error - not a valid branch instruction form. */ | |
252b5132 | 1010 | |
252b5132 RH |
1011 | return br_insn; |
1012 | } | |
1013 | ||
9b485d32 NC |
1014 | /* Thumb code calling an ARM function. */ |
1015 | ||
252b5132 RH |
1016 | static int |
1017 | elf32_thumb_to_arm_stub (info, name, input_bfd, output_bfd, input_section, | |
1018 | hit_data, sym_sec, offset, addend, val) | |
bcbdc74c NC |
1019 | struct bfd_link_info * info; |
1020 | const char * name; | |
1021 | bfd * input_bfd; | |
1022 | bfd * output_bfd; | |
1023 | asection * input_section; | |
1024 | bfd_byte * hit_data; | |
1025 | asection * sym_sec; | |
1026 | bfd_vma offset; | |
1027 | bfd_signed_vma addend; | |
1028 | bfd_vma val; | |
252b5132 | 1029 | { |
bcbdc74c | 1030 | asection * s = 0; |
dc810e39 | 1031 | bfd_vma my_offset; |
252b5132 RH |
1032 | unsigned long int tmp; |
1033 | long int ret_offset; | |
bcbdc74c NC |
1034 | struct elf_link_hash_entry * myh; |
1035 | struct elf32_arm_link_hash_table * globals; | |
252b5132 RH |
1036 | |
1037 | myh = find_thumb_glue (info, name, input_bfd); | |
1038 | if (myh == NULL) | |
b34976b6 | 1039 | return FALSE; |
252b5132 RH |
1040 | |
1041 | globals = elf32_arm_hash_table (info); | |
1042 | ||
1043 | BFD_ASSERT (globals != NULL); | |
1044 | BFD_ASSERT (globals->bfd_of_glue_owner != NULL); | |
1045 | ||
1046 | my_offset = myh->root.u.def.value; | |
1047 | ||
1048 | s = bfd_get_section_by_name (globals->bfd_of_glue_owner, | |
1049 | THUMB2ARM_GLUE_SECTION_NAME); | |
1050 | ||
1051 | BFD_ASSERT (s != NULL); | |
1052 | BFD_ASSERT (s->contents != NULL); | |
1053 | BFD_ASSERT (s->output_section != NULL); | |
1054 | ||
1055 | if ((my_offset & 0x01) == 0x01) | |
1056 | { | |
1057 | if (sym_sec != NULL | |
1058 | && sym_sec->owner != NULL | |
1059 | && !INTERWORK_FLAG (sym_sec->owner)) | |
1060 | { | |
8f615d07 | 1061 | (*_bfd_error_handler) |
9b485d32 | 1062 | (_("%s(%s): warning: interworking not enabled."), |
8f615d07 AM |
1063 | bfd_archive_filename (sym_sec->owner), name); |
1064 | (*_bfd_error_handler) | |
9b485d32 | 1065 | (_(" first occurrence: %s: thumb call to arm"), |
8f615d07 | 1066 | bfd_archive_filename (input_bfd)); |
252b5132 | 1067 | |
b34976b6 | 1068 | return FALSE; |
252b5132 RH |
1069 | } |
1070 | ||
1071 | --my_offset; | |
1072 | myh->root.u.def.value = my_offset; | |
1073 | ||
dc810e39 | 1074 | bfd_put_16 (output_bfd, (bfd_vma) t2a1_bx_pc_insn, |
252b5132 RH |
1075 | s->contents + my_offset); |
1076 | ||
dc810e39 | 1077 | bfd_put_16 (output_bfd, (bfd_vma) t2a2_noop_insn, |
252b5132 RH |
1078 | s->contents + my_offset + 2); |
1079 | ||
1080 | ret_offset = | |
9b485d32 NC |
1081 | /* Address of destination of the stub. */ |
1082 | ((bfd_signed_vma) val) | |
252b5132 | 1083 | - ((bfd_signed_vma) |
9b485d32 NC |
1084 | /* Offset from the start of the current section to the start of the stubs. */ |
1085 | (s->output_offset | |
1086 | /* Offset of the start of this stub from the start of the stubs. */ | |
1087 | + my_offset | |
1088 | /* Address of the start of the current section. */ | |
1089 | + s->output_section->vma) | |
1090 | /* The branch instruction is 4 bytes into the stub. */ | |
1091 | + 4 | |
1092 | /* ARM branches work from the pc of the instruction + 8. */ | |
1093 | + 8); | |
252b5132 RH |
1094 | |
1095 | bfd_put_32 (output_bfd, | |
dc810e39 | 1096 | (bfd_vma) t2a3_b_insn | ((ret_offset >> 2) & 0x00FFFFFF), |
252b5132 RH |
1097 | s->contents + my_offset + 4); |
1098 | } | |
1099 | ||
1100 | BFD_ASSERT (my_offset <= globals->thumb_glue_size); | |
1101 | ||
427bfd90 NC |
1102 | /* Now go back and fix up the original BL insn to point to here. */ |
1103 | ret_offset = | |
1104 | /* Address of where the stub is located. */ | |
1105 | (s->output_section->vma + s->output_offset + my_offset) | |
1106 | /* Address of where the BL is located. */ | |
1107 | - (input_section->output_section->vma + input_section->output_offset + offset) | |
1108 | /* Addend in the relocation. */ | |
1109 | - addend | |
1110 | /* Biassing for PC-relative addressing. */ | |
1111 | - 8; | |
252b5132 RH |
1112 | |
1113 | tmp = bfd_get_32 (input_bfd, hit_data | |
1114 | - input_section->vma); | |
1115 | ||
1116 | bfd_put_32 (output_bfd, | |
dc810e39 | 1117 | (bfd_vma) insert_thumb_branch (tmp, ret_offset), |
252b5132 RH |
1118 | hit_data - input_section->vma); |
1119 | ||
b34976b6 | 1120 | return TRUE; |
252b5132 RH |
1121 | } |
1122 | ||
9b485d32 NC |
1123 | /* Arm code calling a Thumb function. */ |
1124 | ||
252b5132 RH |
1125 | static int |
1126 | elf32_arm_to_thumb_stub (info, name, input_bfd, output_bfd, input_section, | |
1127 | hit_data, sym_sec, offset, addend, val) | |
bcbdc74c NC |
1128 | struct bfd_link_info * info; |
1129 | const char * name; | |
1130 | bfd * input_bfd; | |
1131 | bfd * output_bfd; | |
1132 | asection * input_section; | |
1133 | bfd_byte * hit_data; | |
1134 | asection * sym_sec; | |
1135 | bfd_vma offset; | |
1136 | bfd_signed_vma addend; | |
1137 | bfd_vma val; | |
252b5132 RH |
1138 | { |
1139 | unsigned long int tmp; | |
dc810e39 | 1140 | bfd_vma my_offset; |
bcbdc74c | 1141 | asection * s; |
252b5132 | 1142 | long int ret_offset; |
bcbdc74c NC |
1143 | struct elf_link_hash_entry * myh; |
1144 | struct elf32_arm_link_hash_table * globals; | |
252b5132 RH |
1145 | |
1146 | myh = find_arm_glue (info, name, input_bfd); | |
1147 | if (myh == NULL) | |
b34976b6 | 1148 | return FALSE; |
252b5132 RH |
1149 | |
1150 | globals = elf32_arm_hash_table (info); | |
1151 | ||
1152 | BFD_ASSERT (globals != NULL); | |
1153 | BFD_ASSERT (globals->bfd_of_glue_owner != NULL); | |
1154 | ||
1155 | my_offset = myh->root.u.def.value; | |
1156 | s = bfd_get_section_by_name (globals->bfd_of_glue_owner, | |
1157 | ARM2THUMB_GLUE_SECTION_NAME); | |
1158 | BFD_ASSERT (s != NULL); | |
1159 | BFD_ASSERT (s->contents != NULL); | |
1160 | BFD_ASSERT (s->output_section != NULL); | |
1161 | ||
1162 | if ((my_offset & 0x01) == 0x01) | |
1163 | { | |
1164 | if (sym_sec != NULL | |
1165 | && sym_sec->owner != NULL | |
1166 | && !INTERWORK_FLAG (sym_sec->owner)) | |
1167 | { | |
8f615d07 | 1168 | (*_bfd_error_handler) |
9b485d32 | 1169 | (_("%s(%s): warning: interworking not enabled."), |
8f615d07 AM |
1170 | bfd_archive_filename (sym_sec->owner), name); |
1171 | (*_bfd_error_handler) | |
9b485d32 | 1172 | (_(" first occurrence: %s: arm call to thumb"), |
8f615d07 | 1173 | bfd_archive_filename (input_bfd)); |
252b5132 | 1174 | } |
9b485d32 | 1175 | |
252b5132 RH |
1176 | --my_offset; |
1177 | myh->root.u.def.value = my_offset; | |
1178 | ||
dc810e39 | 1179 | bfd_put_32 (output_bfd, (bfd_vma) a2t1_ldr_insn, |
252b5132 RH |
1180 | s->contents + my_offset); |
1181 | ||
dc810e39 | 1182 | bfd_put_32 (output_bfd, (bfd_vma) a2t2_bx_r12_insn, |
252b5132 RH |
1183 | s->contents + my_offset + 4); |
1184 | ||
1185 | /* It's a thumb address. Add the low order bit. */ | |
1186 | bfd_put_32 (output_bfd, val | a2t3_func_addr_insn, | |
1187 | s->contents + my_offset + 8); | |
1188 | } | |
1189 | ||
1190 | BFD_ASSERT (my_offset <= globals->arm_glue_size); | |
1191 | ||
1192 | tmp = bfd_get_32 (input_bfd, hit_data); | |
1193 | tmp = tmp & 0xFF000000; | |
1194 | ||
9b485d32 | 1195 | /* Somehow these are both 4 too far, so subtract 8. */ |
dc810e39 AM |
1196 | ret_offset = (s->output_offset |
1197 | + my_offset | |
1198 | + s->output_section->vma | |
1199 | - (input_section->output_offset | |
1200 | + input_section->output_section->vma | |
1201 | + offset + addend) | |
1202 | - 8); | |
9a5aca8c | 1203 | |
252b5132 RH |
1204 | tmp = tmp | ((ret_offset >> 2) & 0x00FFFFFF); |
1205 | ||
dc810e39 | 1206 | bfd_put_32 (output_bfd, (bfd_vma) tmp, hit_data - input_section->vma); |
252b5132 | 1207 | |
b34976b6 | 1208 | return TRUE; |
252b5132 RH |
1209 | } |
1210 | ||
50d6c878 DJ |
1211 | /* This is the condition under which elf32_arm_finish_dynamic_symbol |
1212 | will be called from elflink.h. If elflink.h doesn't call our | |
1213 | finish_dynamic_symbol routine, we'll need to do something about | |
1214 | initializing any .plt and .got entries in elf32_arm_relocate_section | |
1215 | and elf32_arm_final_link_relocate. */ | |
1216 | #define WILL_CALL_FINISH_DYNAMIC_SYMBOL(DYN, SHARED, H) \ | |
1217 | ((DYN) \ | |
1218 | && ((SHARED) \ | |
1219 | || ((H)->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0) \ | |
1220 | && ((H)->dynindx != -1 \ | |
1221 | || ((H)->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0)) | |
1222 | ||
252b5132 | 1223 | /* Perform a relocation as part of a final link. */ |
9b485d32 | 1224 | |
252b5132 RH |
1225 | static bfd_reloc_status_type |
1226 | elf32_arm_final_link_relocate (howto, input_bfd, output_bfd, | |
1227 | input_section, contents, rel, value, | |
780a67af | 1228 | info, sym_sec, sym_name, sym_flags, h) |
252b5132 RH |
1229 | reloc_howto_type * howto; |
1230 | bfd * input_bfd; | |
1231 | bfd * output_bfd; | |
1232 | asection * input_section; | |
1233 | bfd_byte * contents; | |
1234 | Elf_Internal_Rela * rel; | |
1235 | bfd_vma value; | |
1236 | struct bfd_link_info * info; | |
1237 | asection * sym_sec; | |
1238 | const char * sym_name; | |
dc810e39 | 1239 | int sym_flags; |
780a67af | 1240 | struct elf_link_hash_entry * h; |
252b5132 RH |
1241 | { |
1242 | unsigned long r_type = howto->type; | |
1243 | unsigned long r_symndx; | |
1244 | bfd_byte * hit_data = contents + rel->r_offset; | |
1245 | bfd * dynobj = NULL; | |
1246 | Elf_Internal_Shdr * symtab_hdr; | |
1247 | struct elf_link_hash_entry ** sym_hashes; | |
1248 | bfd_vma * local_got_offsets; | |
1249 | asection * sgot = NULL; | |
1250 | asection * splt = NULL; | |
1251 | asection * sreloc = NULL; | |
252b5132 | 1252 | bfd_vma addend; |
ba96a88f NC |
1253 | bfd_signed_vma signed_addend; |
1254 | struct elf32_arm_link_hash_table * globals; | |
f21f3fe0 | 1255 | |
cac15327 NC |
1256 | /* If the start address has been set, then set the EF_ARM_HASENTRY |
1257 | flag. Setting this more than once is redundant, but the cost is | |
1258 | not too high, and it keeps the code simple. | |
99e4ae17 | 1259 | |
cac15327 NC |
1260 | The test is done here, rather than somewhere else, because the |
1261 | start address is only set just before the final link commences. | |
1262 | ||
1263 | Note - if the user deliberately sets a start address of 0, the | |
1264 | flag will not be set. */ | |
1265 | if (bfd_get_start_address (output_bfd) != 0) | |
1266 | elf_elfheader (output_bfd)->e_flags |= EF_ARM_HASENTRY; | |
99e4ae17 | 1267 | |
ba96a88f | 1268 | globals = elf32_arm_hash_table (info); |
f21f3fe0 | 1269 | |
252b5132 RH |
1270 | dynobj = elf_hash_table (info)->dynobj; |
1271 | if (dynobj) | |
1272 | { | |
1273 | sgot = bfd_get_section_by_name (dynobj, ".got"); | |
1274 | splt = bfd_get_section_by_name (dynobj, ".plt"); | |
1275 | } | |
1276 | symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr; | |
1277 | sym_hashes = elf_sym_hashes (input_bfd); | |
1278 | local_got_offsets = elf_local_got_offsets (input_bfd); | |
1279 | r_symndx = ELF32_R_SYM (rel->r_info); | |
1280 | ||
acf8aed4 | 1281 | #if USE_REL |
ba96a88f NC |
1282 | addend = bfd_get_32 (input_bfd, hit_data) & howto->src_mask; |
1283 | ||
1284 | if (addend & ((howto->src_mask + 1) >> 1)) | |
1285 | { | |
1286 | signed_addend = -1; | |
1287 | signed_addend &= ~ howto->src_mask; | |
1288 | signed_addend |= addend; | |
1289 | } | |
1290 | else | |
1291 | signed_addend = addend; | |
252b5132 | 1292 | #else |
ba96a88f | 1293 | addend = signed_addend = rel->r_addend; |
252b5132 | 1294 | #endif |
f21f3fe0 | 1295 | |
252b5132 RH |
1296 | switch (r_type) |
1297 | { | |
1298 | case R_ARM_NONE: | |
1299 | return bfd_reloc_ok; | |
1300 | ||
1301 | case R_ARM_PC24: | |
1302 | case R_ARM_ABS32: | |
1303 | case R_ARM_REL32: | |
dfc5f959 NC |
1304 | #ifndef OLD_ARM_ABI |
1305 | case R_ARM_XPC25: | |
1306 | #endif | |
7359ea65 | 1307 | case R_ARM_PLT32: |
5e681ec4 PB |
1308 | /* r_symndx will be zero only for relocs against symbols |
1309 | from removed linkonce sections, or sections discarded by | |
1310 | a linker script. */ | |
1311 | if (r_symndx == 0) | |
1312 | return bfd_reloc_ok; | |
1313 | ||
7359ea65 DJ |
1314 | /* Handle relocations which should use the PLT entry. ABS32/REL32 |
1315 | will use the symbol's value, which may point to a PLT entry, but we | |
1316 | don't need to handle that here. If we created a PLT entry, all | |
1317 | branches in this object should go to it. */ | |
1318 | if ((r_type != R_ARM_ABS32 && r_type != R_ARM_REL32) | |
1319 | && h != NULL | |
c84cd8ee | 1320 | && splt != NULL |
7359ea65 DJ |
1321 | && h->plt.offset != (bfd_vma) -1) |
1322 | { | |
c84cd8ee DJ |
1323 | /* If we've created a .plt section, and assigned a PLT entry to |
1324 | this function, it should not be known to bind locally. If | |
1325 | it were, we would have cleared the PLT entry. */ | |
7359ea65 DJ |
1326 | BFD_ASSERT (!SYMBOL_CALLS_LOCAL (info, h)); |
1327 | ||
1328 | value = (splt->output_section->vma | |
1329 | + splt->output_offset | |
1330 | + h->plt.offset); | |
1331 | return _bfd_final_link_relocate (howto, input_bfd, input_section, | |
1332 | contents, rel->r_offset, value, | |
1333 | (bfd_vma) 0); | |
1334 | } | |
1335 | ||
252b5132 | 1336 | /* When generating a shared object, these relocations are copied |
9b485d32 | 1337 | into the output file to be resolved at run time. */ |
7359ea65 DJ |
1338 | if (info->shared |
1339 | && (input_section->flags & SEC_ALLOC) | |
1340 | && (h == NULL | |
1341 | || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT | |
1342 | || h->root.type != bfd_link_hash_undefweak) | |
1343 | && r_type != R_ARM_PC24 | |
1344 | && r_type != R_ARM_PLT32) | |
252b5132 | 1345 | { |
947216bf AM |
1346 | Elf_Internal_Rela outrel; |
1347 | bfd_byte *loc; | |
b34976b6 | 1348 | bfd_boolean skip, relocate; |
f21f3fe0 | 1349 | |
252b5132 RH |
1350 | if (sreloc == NULL) |
1351 | { | |
1352 | const char * name; | |
f21f3fe0 | 1353 | |
252b5132 RH |
1354 | name = (bfd_elf_string_from_elf_section |
1355 | (input_bfd, | |
1356 | elf_elfheader (input_bfd)->e_shstrndx, | |
1357 | elf_section_data (input_section)->rel_hdr.sh_name)); | |
1358 | if (name == NULL) | |
1359 | return bfd_reloc_notsupported; | |
f21f3fe0 | 1360 | |
252b5132 RH |
1361 | BFD_ASSERT (strncmp (name, ".rel", 4) == 0 |
1362 | && strcmp (bfd_get_section_name (input_bfd, | |
1363 | input_section), | |
1364 | name + 4) == 0); | |
f21f3fe0 | 1365 | |
252b5132 RH |
1366 | sreloc = bfd_get_section_by_name (dynobj, name); |
1367 | BFD_ASSERT (sreloc != NULL); | |
1368 | } | |
f21f3fe0 | 1369 | |
b34976b6 AM |
1370 | skip = FALSE; |
1371 | relocate = FALSE; | |
f21f3fe0 | 1372 | |
c629eae0 JJ |
1373 | outrel.r_offset = |
1374 | _bfd_elf_section_offset (output_bfd, info, input_section, | |
1375 | rel->r_offset); | |
1376 | if (outrel.r_offset == (bfd_vma) -1) | |
b34976b6 | 1377 | skip = TRUE; |
0bb2d96a | 1378 | else if (outrel.r_offset == (bfd_vma) -2) |
b34976b6 | 1379 | skip = TRUE, relocate = TRUE; |
252b5132 RH |
1380 | outrel.r_offset += (input_section->output_section->vma |
1381 | + input_section->output_offset); | |
f21f3fe0 | 1382 | |
252b5132 | 1383 | if (skip) |
0bb2d96a | 1384 | memset (&outrel, 0, sizeof outrel); |
5e681ec4 PB |
1385 | else if (h != NULL |
1386 | && h->dynindx != -1 | |
7359ea65 | 1387 | && (!info->shared |
5e681ec4 PB |
1388 | || !info->symbolic |
1389 | || (h->elf_link_hash_flags | |
1390 | & ELF_LINK_HASH_DEF_REGULAR) == 0)) | |
1391 | outrel.r_info = ELF32_R_INFO (h->dynindx, r_type); | |
252b5132 RH |
1392 | else |
1393 | { | |
5e681ec4 PB |
1394 | /* This symbol is local, or marked to become local. */ |
1395 | relocate = TRUE; | |
1396 | outrel.r_info = ELF32_R_INFO (0, R_ARM_RELATIVE); | |
252b5132 | 1397 | } |
f21f3fe0 | 1398 | |
947216bf AM |
1399 | loc = sreloc->contents; |
1400 | loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rel); | |
1401 | bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc); | |
9a5aca8c | 1402 | |
f21f3fe0 | 1403 | /* If this reloc is against an external symbol, we do not want to |
252b5132 | 1404 | fiddle with the addend. Otherwise, we need to include the symbol |
9b485d32 | 1405 | value so that it becomes an addend for the dynamic reloc. */ |
252b5132 RH |
1406 | if (! relocate) |
1407 | return bfd_reloc_ok; | |
9a5aca8c | 1408 | |
f21f3fe0 | 1409 | return _bfd_final_link_relocate (howto, input_bfd, input_section, |
252b5132 RH |
1410 | contents, rel->r_offset, value, |
1411 | (bfd_vma) 0); | |
1412 | } | |
1413 | else switch (r_type) | |
1414 | { | |
dfc5f959 NC |
1415 | #ifndef OLD_ARM_ABI |
1416 | case R_ARM_XPC25: /* Arm BLX instruction. */ | |
1417 | #endif | |
1418 | case R_ARM_PC24: /* Arm B/BL instruction */ | |
7359ea65 | 1419 | case R_ARM_PLT32: |
dfc5f959 NC |
1420 | #ifndef OLD_ARM_ABI |
1421 | if (r_type == R_ARM_XPC25) | |
252b5132 | 1422 | { |
dfc5f959 NC |
1423 | /* Check for Arm calling Arm function. */ |
1424 | /* FIXME: Should we translate the instruction into a BL | |
1425 | instruction instead ? */ | |
1426 | if (sym_flags != STT_ARM_TFUNC) | |
8f615d07 | 1427 | (*_bfd_error_handler) (_("\ |
dfc5f959 | 1428 | %s: Warning: Arm BLX instruction targets Arm function '%s'."), |
8f615d07 AM |
1429 | bfd_archive_filename (input_bfd), |
1430 | h ? h->root.root.string : "(local)"); | |
dfc5f959 NC |
1431 | } |
1432 | else | |
1433 | #endif | |
1434 | { | |
1435 | /* Check for Arm calling Thumb function. */ | |
1436 | if (sym_flags == STT_ARM_TFUNC) | |
1437 | { | |
1438 | elf32_arm_to_thumb_stub (info, sym_name, input_bfd, output_bfd, | |
1439 | input_section, hit_data, sym_sec, rel->r_offset, | |
1440 | signed_addend, value); | |
1441 | return bfd_reloc_ok; | |
1442 | } | |
252b5132 | 1443 | } |
ba96a88f NC |
1444 | |
1445 | if ( strcmp (bfd_get_target (input_bfd), "elf32-littlearm-oabi") == 0 | |
1446 | || strcmp (bfd_get_target (input_bfd), "elf32-bigarm-oabi") == 0) | |
1447 | { | |
1448 | /* The old way of doing things. Trearing the addend as a | |
1449 | byte sized field and adding in the pipeline offset. */ | |
ba96a88f NC |
1450 | value -= (input_section->output_section->vma |
1451 | + input_section->output_offset); | |
1452 | value -= rel->r_offset; | |
1453 | value += addend; | |
f21f3fe0 | 1454 | |
ba96a88f NC |
1455 | if (! globals->no_pipeline_knowledge) |
1456 | value -= 8; | |
1457 | } | |
1458 | else | |
1459 | { | |
1460 | /* The ARM ELF ABI says that this reloc is computed as: S - P + A | |
1461 | where: | |
1462 | S is the address of the symbol in the relocation. | |
1463 | P is address of the instruction being relocated. | |
1464 | A is the addend (extracted from the instruction) in bytes. | |
f21f3fe0 | 1465 | |
ba96a88f NC |
1466 | S is held in 'value'. |
1467 | P is the base address of the section containing the instruction | |
1468 | plus the offset of the reloc into that section, ie: | |
1469 | (input_section->output_section->vma + | |
1470 | input_section->output_offset + | |
1471 | rel->r_offset). | |
1472 | A is the addend, converted into bytes, ie: | |
1473 | (signed_addend * 4) | |
1474 | ||
1475 | Note: None of these operations have knowledge of the pipeline | |
1476 | size of the processor, thus it is up to the assembler to encode | |
1477 | this information into the addend. */ | |
ba96a88f NC |
1478 | value -= (input_section->output_section->vma |
1479 | + input_section->output_offset); | |
1480 | value -= rel->r_offset; | |
1481 | value += (signed_addend << howto->size); | |
f21f3fe0 | 1482 | |
ba96a88f NC |
1483 | /* Previous versions of this code also used to add in the pipeline |
1484 | offset here. This is wrong because the linker is not supposed | |
1485 | to know about such things, and one day it might change. In order | |
1486 | to support old binaries that need the old behaviour however, so | |
1487 | we attempt to detect which ABI was used to create the reloc. */ | |
1488 | if (! globals->no_pipeline_knowledge) | |
f21f3fe0 | 1489 | { |
ba96a88f | 1490 | Elf_Internal_Ehdr * i_ehdrp; /* Elf file header, internal form */ |
f21f3fe0 | 1491 | |
ba96a88f | 1492 | i_ehdrp = elf_elfheader (input_bfd); |
f21f3fe0 | 1493 | |
ba96a88f NC |
1494 | if (i_ehdrp->e_ident[EI_OSABI] == 0) |
1495 | value -= 8; | |
1496 | } | |
1497 | } | |
23080146 | 1498 | |
dcb5e6e6 NC |
1499 | signed_addend = value; |
1500 | signed_addend >>= howto->rightshift; | |
9a5aca8c | 1501 | |
59f2c4e7 NC |
1502 | /* It is not an error for an undefined weak reference to be |
1503 | out of range. Any program that branches to such a symbol | |
9a5aca8c AM |
1504 | is going to crash anyway, so there is no point worrying |
1505 | about getting the destination exactly right. */ | |
59f2c4e7 NC |
1506 | if (! h || h->root.type != bfd_link_hash_undefweak) |
1507 | { | |
9b485d32 | 1508 | /* Perform a signed range check. */ |
dcb5e6e6 | 1509 | if ( signed_addend > ((bfd_signed_vma) (howto->dst_mask >> 1)) |
59f2c4e7 NC |
1510 | || signed_addend < - ((bfd_signed_vma) ((howto->dst_mask + 1) >> 1))) |
1511 | return bfd_reloc_overflow; | |
1512 | } | |
9a5aca8c | 1513 | |
dcb5e6e6 NC |
1514 | #ifndef OLD_ARM_ABI |
1515 | /* If necessary set the H bit in the BLX instruction. */ | |
1516 | if (r_type == R_ARM_XPC25 && ((value & 2) == 2)) | |
1517 | value = (signed_addend & howto->dst_mask) | |
1518 | | (bfd_get_32 (input_bfd, hit_data) & (~ howto->dst_mask)) | |
1519 | | (1 << 24); | |
1520 | else | |
1521 | #endif | |
1522 | value = (signed_addend & howto->dst_mask) | |
1523 | | (bfd_get_32 (input_bfd, hit_data) & (~ howto->dst_mask)); | |
252b5132 | 1524 | break; |
f21f3fe0 | 1525 | |
252b5132 RH |
1526 | case R_ARM_ABS32: |
1527 | value += addend; | |
1528 | if (sym_flags == STT_ARM_TFUNC) | |
1529 | value |= 1; | |
1530 | break; | |
f21f3fe0 | 1531 | |
252b5132 RH |
1532 | case R_ARM_REL32: |
1533 | value -= (input_section->output_section->vma | |
62efb346 | 1534 | + input_section->output_offset + rel->r_offset); |
252b5132 RH |
1535 | value += addend; |
1536 | break; | |
1537 | } | |
f21f3fe0 | 1538 | |
252b5132 RH |
1539 | bfd_put_32 (input_bfd, value, hit_data); |
1540 | return bfd_reloc_ok; | |
1541 | ||
1542 | case R_ARM_ABS8: | |
1543 | value += addend; | |
1544 | if ((long) value > 0x7f || (long) value < -0x80) | |
1545 | return bfd_reloc_overflow; | |
1546 | ||
1547 | bfd_put_8 (input_bfd, value, hit_data); | |
1548 | return bfd_reloc_ok; | |
1549 | ||
1550 | case R_ARM_ABS16: | |
1551 | value += addend; | |
1552 | ||
1553 | if ((long) value > 0x7fff || (long) value < -0x8000) | |
1554 | return bfd_reloc_overflow; | |
1555 | ||
1556 | bfd_put_16 (input_bfd, value, hit_data); | |
1557 | return bfd_reloc_ok; | |
1558 | ||
1559 | case R_ARM_ABS12: | |
1560 | /* Support ldr and str instruction for the arm */ | |
1561 | /* Also thumb b (unconditional branch). ??? Really? */ | |
1562 | value += addend; | |
1563 | ||
1564 | if ((long) value > 0x7ff || (long) value < -0x800) | |
1565 | return bfd_reloc_overflow; | |
1566 | ||
1567 | value |= (bfd_get_32 (input_bfd, hit_data) & 0xfffff000); | |
1568 | bfd_put_32 (input_bfd, value, hit_data); | |
1569 | return bfd_reloc_ok; | |
1570 | ||
1571 | case R_ARM_THM_ABS5: | |
9b485d32 | 1572 | /* Support ldr and str instructions for the thumb. */ |
acf8aed4 | 1573 | #if USE_REL |
252b5132 RH |
1574 | /* Need to refetch addend. */ |
1575 | addend = bfd_get_16 (input_bfd, hit_data) & howto->src_mask; | |
1576 | /* ??? Need to determine shift amount from operand size. */ | |
1577 | addend >>= howto->rightshift; | |
1578 | #endif | |
1579 | value += addend; | |
1580 | ||
1581 | /* ??? Isn't value unsigned? */ | |
1582 | if ((long) value > 0x1f || (long) value < -0x10) | |
1583 | return bfd_reloc_overflow; | |
1584 | ||
1585 | /* ??? Value needs to be properly shifted into place first. */ | |
1586 | value |= bfd_get_16 (input_bfd, hit_data) & 0xf83f; | |
1587 | bfd_put_16 (input_bfd, value, hit_data); | |
1588 | return bfd_reloc_ok; | |
1589 | ||
dfc5f959 NC |
1590 | #ifndef OLD_ARM_ABI |
1591 | case R_ARM_THM_XPC22: | |
1592 | #endif | |
252b5132 | 1593 | case R_ARM_THM_PC22: |
dfc5f959 | 1594 | /* Thumb BL (branch long instruction). */ |
252b5132 | 1595 | { |
b34976b6 AM |
1596 | bfd_vma relocation; |
1597 | bfd_boolean overflow = FALSE; | |
1598 | bfd_vma upper_insn = bfd_get_16 (input_bfd, hit_data); | |
1599 | bfd_vma lower_insn = bfd_get_16 (input_bfd, hit_data + 2); | |
df212a7e | 1600 | bfd_signed_vma reloc_signed_max = ((1 << (howto->bitsize - 1)) - 1) >> howto->rightshift; |
ba96a88f | 1601 | bfd_signed_vma reloc_signed_min = ~ reloc_signed_max; |
b34976b6 | 1602 | bfd_vma check; |
252b5132 | 1603 | bfd_signed_vma signed_check; |
252b5132 | 1604 | |
acf8aed4 | 1605 | #if USE_REL |
252b5132 RH |
1606 | /* Need to refetch the addend and squish the two 11 bit pieces |
1607 | together. */ | |
1608 | { | |
ba96a88f NC |
1609 | bfd_vma upper = upper_insn & 0x7ff; |
1610 | bfd_vma lower = lower_insn & 0x7ff; | |
9b485d32 | 1611 | upper = (upper ^ 0x400) - 0x400; /* Sign extend. */ |
252b5132 | 1612 | addend = (upper << 12) | (lower << 1); |
ba96a88f | 1613 | signed_addend = addend; |
252b5132 RH |
1614 | } |
1615 | #endif | |
dfc5f959 NC |
1616 | #ifndef OLD_ARM_ABI |
1617 | if (r_type == R_ARM_THM_XPC22) | |
1618 | { | |
1619 | /* Check for Thumb to Thumb call. */ | |
1620 | /* FIXME: Should we translate the instruction into a BL | |
1621 | instruction instead ? */ | |
1622 | if (sym_flags == STT_ARM_TFUNC) | |
8f615d07 | 1623 | (*_bfd_error_handler) (_("\ |
dfc5f959 | 1624 | %s: Warning: Thumb BLX instruction targets thumb function '%s'."), |
8f615d07 AM |
1625 | bfd_archive_filename (input_bfd), |
1626 | h ? h->root.root.string : "(local)"); | |
dfc5f959 NC |
1627 | } |
1628 | else | |
1629 | #endif | |
252b5132 | 1630 | { |
dfc5f959 NC |
1631 | /* If it is not a call to Thumb, assume call to Arm. |
1632 | If it is a call relative to a section name, then it is not a | |
1633 | function call at all, but rather a long jump. */ | |
1634 | if (sym_flags != STT_ARM_TFUNC && sym_flags != STT_SECTION) | |
1635 | { | |
1636 | if (elf32_thumb_to_arm_stub | |
1637 | (info, sym_name, input_bfd, output_bfd, input_section, | |
1638 | hit_data, sym_sec, rel->r_offset, signed_addend, value)) | |
1639 | return bfd_reloc_ok; | |
1640 | else | |
1641 | return bfd_reloc_dangerous; | |
1642 | } | |
252b5132 | 1643 | } |
f21f3fe0 | 1644 | |
ba96a88f | 1645 | relocation = value + signed_addend; |
f21f3fe0 | 1646 | |
252b5132 | 1647 | relocation -= (input_section->output_section->vma |
ba96a88f NC |
1648 | + input_section->output_offset |
1649 | + rel->r_offset); | |
9a5aca8c | 1650 | |
ba96a88f NC |
1651 | if (! globals->no_pipeline_knowledge) |
1652 | { | |
9b485d32 | 1653 | Elf_Internal_Ehdr * i_ehdrp; /* Elf file header, internal form. */ |
9a5aca8c | 1654 | |
ba96a88f | 1655 | i_ehdrp = elf_elfheader (input_bfd); |
f21f3fe0 | 1656 | |
ba96a88f NC |
1657 | /* Previous versions of this code also used to add in the pipline |
1658 | offset here. This is wrong because the linker is not supposed | |
1659 | to know about such things, and one day it might change. In order | |
1660 | to support old binaries that need the old behaviour however, so | |
1661 | we attempt to detect which ABI was used to create the reloc. */ | |
1662 | if ( strcmp (bfd_get_target (input_bfd), "elf32-littlearm-oabi") == 0 | |
1663 | || strcmp (bfd_get_target (input_bfd), "elf32-bigarm-oabi") == 0 | |
1664 | || i_ehdrp->e_ident[EI_OSABI] == 0) | |
1665 | relocation += 4; | |
1666 | } | |
f21f3fe0 | 1667 | |
252b5132 RH |
1668 | check = relocation >> howto->rightshift; |
1669 | ||
1670 | /* If this is a signed value, the rightshift just dropped | |
1671 | leading 1 bits (assuming twos complement). */ | |
1672 | if ((bfd_signed_vma) relocation >= 0) | |
1673 | signed_check = check; | |
1674 | else | |
1675 | signed_check = check | ~((bfd_vma) -1 >> howto->rightshift); | |
1676 | ||
252b5132 | 1677 | /* Assumes two's complement. */ |
ba96a88f | 1678 | if (signed_check > reloc_signed_max || signed_check < reloc_signed_min) |
b34976b6 | 1679 | overflow = TRUE; |
252b5132 | 1680 | |
df425bc0 | 1681 | #ifndef OLD_ARM_ABI |
4f3c3dbb NC |
1682 | if (r_type == R_ARM_THM_XPC22 |
1683 | && ((lower_insn & 0x1800) == 0x0800)) | |
c62e1cc3 NC |
1684 | /* For a BLX instruction, make sure that the relocation is rounded up |
1685 | to a word boundary. This follows the semantics of the instruction | |
1686 | which specifies that bit 1 of the target address will come from bit | |
1687 | 1 of the base address. */ | |
1688 | relocation = (relocation + 2) & ~ 3; | |
99e4ae17 | 1689 | #endif |
c62e1cc3 NC |
1690 | /* Put RELOCATION back into the insn. */ |
1691 | upper_insn = (upper_insn & ~(bfd_vma) 0x7ff) | ((relocation >> 12) & 0x7ff); | |
1692 | lower_insn = (lower_insn & ~(bfd_vma) 0x7ff) | ((relocation >> 1) & 0x7ff); | |
1693 | ||
252b5132 RH |
1694 | /* Put the relocated value back in the object file: */ |
1695 | bfd_put_16 (input_bfd, upper_insn, hit_data); | |
1696 | bfd_put_16 (input_bfd, lower_insn, hit_data + 2); | |
1697 | ||
1698 | return (overflow ? bfd_reloc_overflow : bfd_reloc_ok); | |
1699 | } | |
1700 | break; | |
1701 | ||
51c5503b NC |
1702 | case R_ARM_THM_PC11: |
1703 | /* Thumb B (branch) instruction). */ | |
1704 | { | |
6cf9e9fe | 1705 | bfd_signed_vma relocation; |
51c5503b NC |
1706 | bfd_signed_vma reloc_signed_max = (1 << (howto->bitsize - 1)) - 1; |
1707 | bfd_signed_vma reloc_signed_min = ~ reloc_signed_max; | |
51c5503b NC |
1708 | bfd_signed_vma signed_check; |
1709 | ||
acf8aed4 | 1710 | #if USE_REL |
51c5503b NC |
1711 | /* Need to refetch addend. */ |
1712 | addend = bfd_get_16 (input_bfd, hit_data) & howto->src_mask; | |
6cf9e9fe NC |
1713 | if (addend & ((howto->src_mask + 1) >> 1)) |
1714 | { | |
1715 | signed_addend = -1; | |
1716 | signed_addend &= ~ howto->src_mask; | |
1717 | signed_addend |= addend; | |
1718 | } | |
1719 | else | |
1720 | signed_addend = addend; | |
1721 | /* The value in the insn has been right shifted. We need to | |
1722 | undo this, so that we can perform the address calculation | |
1723 | in terms of bytes. */ | |
1724 | signed_addend <<= howto->rightshift; | |
51c5503b | 1725 | #endif |
6cf9e9fe | 1726 | relocation = value + signed_addend; |
51c5503b NC |
1727 | |
1728 | relocation -= (input_section->output_section->vma | |
1729 | + input_section->output_offset | |
1730 | + rel->r_offset); | |
1731 | ||
6cf9e9fe NC |
1732 | relocation >>= howto->rightshift; |
1733 | signed_check = relocation; | |
1734 | relocation &= howto->dst_mask; | |
51c5503b | 1735 | relocation |= (bfd_get_16 (input_bfd, hit_data) & (~ howto->dst_mask)); |
cedb70c5 | 1736 | |
51c5503b NC |
1737 | bfd_put_16 (input_bfd, relocation, hit_data); |
1738 | ||
1739 | /* Assumes two's complement. */ | |
1740 | if (signed_check > reloc_signed_max || signed_check < reloc_signed_min) | |
1741 | return bfd_reloc_overflow; | |
1742 | ||
1743 | return bfd_reloc_ok; | |
1744 | } | |
cedb70c5 | 1745 | |
252b5132 RH |
1746 | case R_ARM_GNU_VTINHERIT: |
1747 | case R_ARM_GNU_VTENTRY: | |
1748 | return bfd_reloc_ok; | |
1749 | ||
1750 | case R_ARM_COPY: | |
1751 | return bfd_reloc_notsupported; | |
1752 | ||
1753 | case R_ARM_GLOB_DAT: | |
1754 | return bfd_reloc_notsupported; | |
1755 | ||
1756 | case R_ARM_JUMP_SLOT: | |
1757 | return bfd_reloc_notsupported; | |
1758 | ||
1759 | case R_ARM_RELATIVE: | |
1760 | return bfd_reloc_notsupported; | |
1761 | ||
1762 | case R_ARM_GOTOFF: | |
1763 | /* Relocation is relative to the start of the | |
1764 | global offset table. */ | |
1765 | ||
1766 | BFD_ASSERT (sgot != NULL); | |
1767 | if (sgot == NULL) | |
1768 | return bfd_reloc_notsupported; | |
9a5aca8c | 1769 | |
cedb70c5 | 1770 | /* If we are addressing a Thumb function, we need to adjust the |
ee29b9fb RE |
1771 | address by one, so that attempts to call the function pointer will |
1772 | correctly interpret it as Thumb code. */ | |
1773 | if (sym_flags == STT_ARM_TFUNC) | |
1774 | value += 1; | |
1775 | ||
252b5132 RH |
1776 | /* Note that sgot->output_offset is not involved in this |
1777 | calculation. We always want the start of .got. If we | |
1778 | define _GLOBAL_OFFSET_TABLE in a different way, as is | |
1779 | permitted by the ABI, we might have to change this | |
9b485d32 | 1780 | calculation. */ |
252b5132 | 1781 | value -= sgot->output_section->vma; |
f21f3fe0 | 1782 | return _bfd_final_link_relocate (howto, input_bfd, input_section, |
99e4ae17 AJ |
1783 | contents, rel->r_offset, value, |
1784 | (bfd_vma) 0); | |
252b5132 RH |
1785 | |
1786 | case R_ARM_GOTPC: | |
a7c10850 | 1787 | /* Use global offset table as symbol value. */ |
252b5132 | 1788 | BFD_ASSERT (sgot != NULL); |
f21f3fe0 | 1789 | |
252b5132 RH |
1790 | if (sgot == NULL) |
1791 | return bfd_reloc_notsupported; | |
1792 | ||
1793 | value = sgot->output_section->vma; | |
f21f3fe0 | 1794 | return _bfd_final_link_relocate (howto, input_bfd, input_section, |
99e4ae17 AJ |
1795 | contents, rel->r_offset, value, |
1796 | (bfd_vma) 0); | |
f21f3fe0 | 1797 | |
252b5132 RH |
1798 | case R_ARM_GOT32: |
1799 | /* Relocation is to the entry for this symbol in the | |
9b485d32 | 1800 | global offset table. */ |
252b5132 RH |
1801 | if (sgot == NULL) |
1802 | return bfd_reloc_notsupported; | |
f21f3fe0 | 1803 | |
252b5132 RH |
1804 | if (h != NULL) |
1805 | { | |
1806 | bfd_vma off; | |
5e681ec4 | 1807 | bfd_boolean dyn; |
f21f3fe0 | 1808 | |
252b5132 RH |
1809 | off = h->got.offset; |
1810 | BFD_ASSERT (off != (bfd_vma) -1); | |
5e681ec4 | 1811 | dyn = globals->root.dynamic_sections_created; |
f21f3fe0 | 1812 | |
5e681ec4 | 1813 | if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h) |
50d6c878 | 1814 | || (info->shared |
5e681ec4 PB |
1815 | && SYMBOL_REFERENCES_LOCAL (info, h)) |
1816 | || (ELF_ST_VISIBILITY (h->other) | |
1817 | && h->root.type == bfd_link_hash_undefweak)) | |
252b5132 RH |
1818 | { |
1819 | /* This is actually a static link, or it is a -Bsymbolic link | |
1820 | and the symbol is defined locally. We must initialize this | |
1821 | entry in the global offset table. Since the offset must | |
1822 | always be a multiple of 4, we use the least significant bit | |
1823 | to record whether we have initialized it already. | |
f21f3fe0 | 1824 | |
252b5132 | 1825 | When doing a dynamic link, we create a .rel.got relocation |
f21f3fe0 | 1826 | entry to initialize the value. This is done in the |
9b485d32 | 1827 | finish_dynamic_symbol routine. */ |
252b5132 RH |
1828 | if ((off & 1) != 0) |
1829 | off &= ~1; | |
1830 | else | |
1831 | { | |
ee29b9fb RE |
1832 | /* If we are addressing a Thumb function, we need to |
1833 | adjust the address by one, so that attempts to | |
1834 | call the function pointer will correctly | |
1835 | interpret it as Thumb code. */ | |
1836 | if (sym_flags == STT_ARM_TFUNC) | |
1837 | value |= 1; | |
1838 | ||
252b5132 RH |
1839 | bfd_put_32 (output_bfd, value, sgot->contents + off); |
1840 | h->got.offset |= 1; | |
1841 | } | |
1842 | } | |
f21f3fe0 | 1843 | |
252b5132 RH |
1844 | value = sgot->output_offset + off; |
1845 | } | |
1846 | else | |
1847 | { | |
1848 | bfd_vma off; | |
f21f3fe0 | 1849 | |
252b5132 RH |
1850 | BFD_ASSERT (local_got_offsets != NULL && |
1851 | local_got_offsets[r_symndx] != (bfd_vma) -1); | |
f21f3fe0 | 1852 | |
252b5132 | 1853 | off = local_got_offsets[r_symndx]; |
f21f3fe0 | 1854 | |
252b5132 RH |
1855 | /* The offset must always be a multiple of 4. We use the |
1856 | least significant bit to record whether we have already | |
9b485d32 | 1857 | generated the necessary reloc. */ |
252b5132 RH |
1858 | if ((off & 1) != 0) |
1859 | off &= ~1; | |
1860 | else | |
1861 | { | |
1862 | bfd_put_32 (output_bfd, value, sgot->contents + off); | |
f21f3fe0 | 1863 | |
252b5132 RH |
1864 | if (info->shared) |
1865 | { | |
1866 | asection * srelgot; | |
947216bf AM |
1867 | Elf_Internal_Rela outrel; |
1868 | bfd_byte *loc; | |
f21f3fe0 | 1869 | |
252b5132 RH |
1870 | srelgot = bfd_get_section_by_name (dynobj, ".rel.got"); |
1871 | BFD_ASSERT (srelgot != NULL); | |
f21f3fe0 | 1872 | |
252b5132 | 1873 | outrel.r_offset = (sgot->output_section->vma |
f21f3fe0 | 1874 | + sgot->output_offset |
252b5132 RH |
1875 | + off); |
1876 | outrel.r_info = ELF32_R_INFO (0, R_ARM_RELATIVE); | |
947216bf AM |
1877 | loc = srelgot->contents; |
1878 | loc += srelgot->reloc_count++ * sizeof (Elf32_External_Rel); | |
1879 | bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc); | |
252b5132 | 1880 | } |
f21f3fe0 | 1881 | |
252b5132 RH |
1882 | local_got_offsets[r_symndx] |= 1; |
1883 | } | |
f21f3fe0 | 1884 | |
252b5132 RH |
1885 | value = sgot->output_offset + off; |
1886 | } | |
9a5aca8c | 1887 | |
f21f3fe0 | 1888 | return _bfd_final_link_relocate (howto, input_bfd, input_section, |
99e4ae17 AJ |
1889 | contents, rel->r_offset, value, |
1890 | (bfd_vma) 0); | |
f21f3fe0 | 1891 | |
252b5132 RH |
1892 | case R_ARM_SBREL32: |
1893 | return bfd_reloc_notsupported; | |
1894 | ||
1895 | case R_ARM_AMP_VCALL9: | |
1896 | return bfd_reloc_notsupported; | |
1897 | ||
1898 | case R_ARM_RSBREL32: | |
1899 | return bfd_reloc_notsupported; | |
1900 | ||
1901 | case R_ARM_THM_RPC22: | |
1902 | return bfd_reloc_notsupported; | |
1903 | ||
1904 | case R_ARM_RREL32: | |
1905 | return bfd_reloc_notsupported; | |
1906 | ||
1907 | case R_ARM_RABS32: | |
1908 | return bfd_reloc_notsupported; | |
1909 | ||
1910 | case R_ARM_RPC24: | |
1911 | return bfd_reloc_notsupported; | |
1912 | ||
1913 | case R_ARM_RBASE: | |
1914 | return bfd_reloc_notsupported; | |
1915 | ||
1916 | default: | |
1917 | return bfd_reloc_notsupported; | |
1918 | } | |
1919 | } | |
1920 | ||
acf8aed4 | 1921 | #if USE_REL |
98c1d4aa NC |
1922 | /* Add INCREMENT to the reloc (of type HOWTO) at ADDRESS. */ |
1923 | static void | |
1924 | arm_add_to_rel (abfd, address, howto, increment) | |
1925 | bfd * abfd; | |
59f2c4e7 | 1926 | bfd_byte * address; |
98c1d4aa NC |
1927 | reloc_howto_type * howto; |
1928 | bfd_signed_vma increment; | |
1929 | { | |
98c1d4aa NC |
1930 | bfd_signed_vma addend; |
1931 | ||
9a5aca8c | 1932 | if (howto->type == R_ARM_THM_PC22) |
98c1d4aa | 1933 | { |
9a5aca8c AM |
1934 | int upper_insn, lower_insn; |
1935 | int upper, lower; | |
98c1d4aa | 1936 | |
9a5aca8c AM |
1937 | upper_insn = bfd_get_16 (abfd, address); |
1938 | lower_insn = bfd_get_16 (abfd, address + 2); | |
1939 | upper = upper_insn & 0x7ff; | |
1940 | lower = lower_insn & 0x7ff; | |
1941 | ||
1942 | addend = (upper << 12) | (lower << 1); | |
ddda4409 | 1943 | addend += increment; |
9a5aca8c | 1944 | addend >>= 1; |
98c1d4aa | 1945 | |
9a5aca8c AM |
1946 | upper_insn = (upper_insn & 0xf800) | ((addend >> 11) & 0x7ff); |
1947 | lower_insn = (lower_insn & 0xf800) | (addend & 0x7ff); | |
1948 | ||
dc810e39 AM |
1949 | bfd_put_16 (abfd, (bfd_vma) upper_insn, address); |
1950 | bfd_put_16 (abfd, (bfd_vma) lower_insn, address + 2); | |
9a5aca8c AM |
1951 | } |
1952 | else | |
1953 | { | |
1954 | bfd_vma contents; | |
1955 | ||
1956 | contents = bfd_get_32 (abfd, address); | |
1957 | ||
1958 | /* Get the (signed) value from the instruction. */ | |
1959 | addend = contents & howto->src_mask; | |
1960 | if (addend & ((howto->src_mask + 1) >> 1)) | |
1961 | { | |
1962 | bfd_signed_vma mask; | |
1963 | ||
1964 | mask = -1; | |
1965 | mask &= ~ howto->src_mask; | |
1966 | addend |= mask; | |
1967 | } | |
1968 | ||
1969 | /* Add in the increment, (which is a byte value). */ | |
1970 | switch (howto->type) | |
1971 | { | |
1972 | default: | |
1973 | addend += increment; | |
1974 | break; | |
1975 | ||
1976 | case R_ARM_PC24: | |
1977 | addend <<= howto->size; | |
dc810e39 | 1978 | addend += increment; |
9a5aca8c AM |
1979 | |
1980 | /* Should we check for overflow here ? */ | |
1981 | ||
1982 | /* Drop any undesired bits. */ | |
1983 | addend >>= howto->rightshift; | |
1984 | break; | |
1985 | } | |
1986 | ||
1987 | contents = (contents & ~ howto->dst_mask) | (addend & howto->dst_mask); | |
1988 | ||
1989 | bfd_put_32 (abfd, contents, address); | |
ddda4409 | 1990 | } |
98c1d4aa NC |
1991 | } |
1992 | #endif /* USE_REL */ | |
252b5132 RH |
1993 | |
1994 | /* Relocate an ARM ELF section. */ | |
b34976b6 | 1995 | static bfd_boolean |
252b5132 RH |
1996 | elf32_arm_relocate_section (output_bfd, info, input_bfd, input_section, |
1997 | contents, relocs, local_syms, local_sections) | |
b34976b6 AM |
1998 | bfd *output_bfd; |
1999 | struct bfd_link_info *info; | |
2000 | bfd *input_bfd; | |
2001 | asection *input_section; | |
2002 | bfd_byte *contents; | |
2003 | Elf_Internal_Rela *relocs; | |
2004 | Elf_Internal_Sym *local_syms; | |
2005 | asection **local_sections; | |
252b5132 | 2006 | { |
b34976b6 AM |
2007 | Elf_Internal_Shdr *symtab_hdr; |
2008 | struct elf_link_hash_entry **sym_hashes; | |
2009 | Elf_Internal_Rela *rel; | |
2010 | Elf_Internal_Rela *relend; | |
2011 | const char *name; | |
252b5132 | 2012 | |
acf8aed4 | 2013 | #if !USE_REL |
1049f94e | 2014 | if (info->relocatable) |
b34976b6 | 2015 | return TRUE; |
b491616a AM |
2016 | #endif |
2017 | ||
252b5132 RH |
2018 | symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr; |
2019 | sym_hashes = elf_sym_hashes (input_bfd); | |
2020 | ||
2021 | rel = relocs; | |
2022 | relend = relocs + input_section->reloc_count; | |
2023 | for (; rel < relend; rel++) | |
2024 | { | |
ba96a88f NC |
2025 | int r_type; |
2026 | reloc_howto_type * howto; | |
2027 | unsigned long r_symndx; | |
2028 | Elf_Internal_Sym * sym; | |
2029 | asection * sec; | |
252b5132 | 2030 | struct elf_link_hash_entry * h; |
ba96a88f NC |
2031 | bfd_vma relocation; |
2032 | bfd_reloc_status_type r; | |
2033 | arelent bfd_reloc; | |
f21f3fe0 | 2034 | |
252b5132 | 2035 | r_symndx = ELF32_R_SYM (rel->r_info); |
ba96a88f | 2036 | r_type = ELF32_R_TYPE (rel->r_info); |
252b5132 | 2037 | |
ba96a88f NC |
2038 | if ( r_type == R_ARM_GNU_VTENTRY |
2039 | || r_type == R_ARM_GNU_VTINHERIT) | |
252b5132 RH |
2040 | continue; |
2041 | ||
dc810e39 | 2042 | elf32_arm_info_to_howto (input_bfd, & bfd_reloc, rel); |
ba96a88f | 2043 | howto = bfd_reloc.howto; |
252b5132 | 2044 | |
acf8aed4 | 2045 | #if USE_REL |
1049f94e | 2046 | if (info->relocatable) |
252b5132 | 2047 | { |
1049f94e | 2048 | /* This is a relocatable link. We don't have to change |
252b5132 RH |
2049 | anything, unless the reloc is against a section symbol, |
2050 | in which case we have to adjust according to where the | |
2051 | section symbol winds up in the output section. */ | |
2052 | if (r_symndx < symtab_hdr->sh_info) | |
2053 | { | |
2054 | sym = local_syms + r_symndx; | |
2055 | if (ELF_ST_TYPE (sym->st_info) == STT_SECTION) | |
2056 | { | |
2057 | sec = local_sections[r_symndx]; | |
98c1d4aa | 2058 | arm_add_to_rel (input_bfd, contents + rel->r_offset, |
dc810e39 AM |
2059 | howto, |
2060 | (bfd_signed_vma) (sec->output_offset | |
2061 | + sym->st_value)); | |
252b5132 RH |
2062 | } |
2063 | } | |
2064 | ||
2065 | continue; | |
2066 | } | |
b491616a | 2067 | #endif |
252b5132 RH |
2068 | |
2069 | /* This is a final link. */ | |
2070 | h = NULL; | |
2071 | sym = NULL; | |
2072 | sec = NULL; | |
9b485d32 | 2073 | |
252b5132 RH |
2074 | if (r_symndx < symtab_hdr->sh_info) |
2075 | { | |
2076 | sym = local_syms + r_symndx; | |
2077 | sec = local_sections[r_symndx]; | |
acf8aed4 | 2078 | #if USE_REL |
252b5132 RH |
2079 | relocation = (sec->output_section->vma |
2080 | + sec->output_offset | |
2081 | + sym->st_value); | |
f8df10f4 JJ |
2082 | if ((sec->flags & SEC_MERGE) |
2083 | && ELF_ST_TYPE (sym->st_info) == STT_SECTION) | |
2084 | { | |
2085 | asection *msec; | |
2086 | bfd_vma addend, value; | |
2087 | ||
2088 | if (howto->rightshift) | |
2089 | { | |
2090 | (*_bfd_error_handler) | |
2091 | (_("%s(%s+0x%lx): %s relocation against SEC_MERGE section"), | |
2092 | bfd_archive_filename (input_bfd), | |
2093 | bfd_get_section_name (input_bfd, input_section), | |
2094 | (long) rel->r_offset, howto->name); | |
b34976b6 | 2095 | return FALSE; |
f8df10f4 JJ |
2096 | } |
2097 | ||
2098 | value = bfd_get_32 (input_bfd, contents + rel->r_offset); | |
2099 | ||
2100 | /* Get the (signed) value from the instruction. */ | |
2101 | addend = value & howto->src_mask; | |
2102 | if (addend & ((howto->src_mask + 1) >> 1)) | |
2103 | { | |
2104 | bfd_signed_vma mask; | |
2105 | ||
2106 | mask = -1; | |
2107 | mask &= ~ howto->src_mask; | |
2108 | addend |= mask; | |
2109 | } | |
2110 | msec = sec; | |
2111 | addend = | |
c629eae0 | 2112 | _bfd_elf_rel_local_sym (output_bfd, sym, &msec, addend) |
f8df10f4 JJ |
2113 | - relocation; |
2114 | addend += msec->output_section->vma + msec->output_offset; | |
2115 | value = (value & ~ howto->dst_mask) | (addend & howto->dst_mask); | |
2116 | bfd_put_32 (input_bfd, value, contents + rel->r_offset); | |
2117 | } | |
2118 | #else | |
8517fae7 | 2119 | relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel); |
f8df10f4 | 2120 | #endif |
252b5132 RH |
2121 | } |
2122 | else | |
2123 | { | |
560e09e9 NC |
2124 | bfd_boolean warned; |
2125 | bfd_boolean unresolved_reloc; | |
2126 | ||
2127 | RELOC_FOR_GLOBAL_SYMBOL (h, sym_hashes, r_symndx, | |
2128 | symtab_hdr, relocation, | |
2129 | sec, unresolved_reloc, info, | |
2130 | warned); | |
2131 | ||
2132 | if (unresolved_reloc || relocation != 0) | |
252b5132 | 2133 | { |
252b5132 | 2134 | /* In these cases, we don't need the relocation value. |
f21f3fe0 | 2135 | We check specially because in some obscure cases |
9b485d32 | 2136 | sec->output_section will be NULL. */ |
252b5132 RH |
2137 | switch (r_type) |
2138 | { | |
2139 | case R_ARM_PC24: | |
2140 | case R_ARM_ABS32: | |
6a360bf4 | 2141 | case R_ARM_THM_PC22: |
252b5132 RH |
2142 | if (info->shared |
2143 | && ( | |
5e681ec4 | 2144 | (!info->symbolic && h->dynindx != -1) |
97eaf9de | 2145 | || (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0 |
252b5132 | 2146 | ) |
5e681ec4 | 2147 | && ELF_ST_VISIBILITY (h->other) == STV_DEFAULT |
05924f36 PB |
2148 | && ((input_section->flags & SEC_ALLOC) != 0 |
2149 | /* DWARF will emit R_ARM_ABS32 relocations in its | |
2150 | sections against symbols defined externally | |
2151 | in shared libraries. We can't do anything | |
2152 | with them here. */ | |
2153 | || ((input_section->flags & SEC_DEBUGGING) != 0 | |
2154 | && (h->elf_link_hash_flags | |
2155 | & ELF_LINK_HASH_DEF_DYNAMIC) != 0)) | |
252b5132 | 2156 | ) |
560e09e9 | 2157 | relocation = 0; |
252b5132 | 2158 | break; |
f21f3fe0 | 2159 | |
252b5132 | 2160 | case R_ARM_GOTPC: |
560e09e9 | 2161 | relocation = 0; |
252b5132 | 2162 | break; |
f21f3fe0 | 2163 | |
252b5132 | 2164 | case R_ARM_GOT32: |
50d6c878 | 2165 | if ((WILL_CALL_FINISH_DYNAMIC_SYMBOL |
560e09e9 | 2166 | (elf_hash_table (info)->dynamic_sections_created, |
50d6c878 DJ |
2167 | info->shared, h)) |
2168 | && (!info->shared | |
252b5132 | 2169 | || (!info->symbolic && h->dynindx != -1) |
50d6c878 DJ |
2170 | || (h->elf_link_hash_flags |
2171 | & ELF_LINK_HASH_DEF_REGULAR) == 0)) | |
560e09e9 | 2172 | relocation = 0; |
252b5132 | 2173 | break; |
f21f3fe0 | 2174 | |
252b5132 RH |
2175 | case R_ARM_PLT32: |
2176 | if (h->plt.offset != (bfd_vma)-1) | |
560e09e9 | 2177 | relocation = 0; |
252b5132 | 2178 | break; |
f21f3fe0 | 2179 | |
252b5132 | 2180 | default: |
560e09e9 NC |
2181 | if (unresolved_reloc) |
2182 | _bfd_error_handler | |
2183 | (_("%s: warning: unresolvable relocation %d against symbol `%s' from %s section"), | |
2184 | bfd_archive_filename (input_bfd), | |
2185 | r_type, | |
2186 | h->root.root.string, | |
2187 | bfd_get_section_name (input_bfd, input_section)); | |
2188 | break; | |
252b5132 | 2189 | } |
252b5132 RH |
2190 | } |
2191 | } | |
2192 | ||
2193 | if (h != NULL) | |
2194 | name = h->root.root.string; | |
2195 | else | |
2196 | { | |
2197 | name = (bfd_elf_string_from_elf_section | |
2198 | (input_bfd, symtab_hdr->sh_link, sym->st_name)); | |
2199 | if (name == NULL || *name == '\0') | |
2200 | name = bfd_section_name (input_bfd, sec); | |
2201 | } | |
f21f3fe0 | 2202 | |
252b5132 RH |
2203 | r = elf32_arm_final_link_relocate (howto, input_bfd, output_bfd, |
2204 | input_section, contents, rel, | |
2205 | relocation, info, sec, name, | |
2206 | (h ? ELF_ST_TYPE (h->type) : | |
780a67af | 2207 | ELF_ST_TYPE (sym->st_info)), h); |
252b5132 RH |
2208 | |
2209 | if (r != bfd_reloc_ok) | |
2210 | { | |
2211 | const char * msg = (const char *) 0; | |
2212 | ||
2213 | switch (r) | |
2214 | { | |
2215 | case bfd_reloc_overflow: | |
cf919dfd PB |
2216 | /* If the overflowing reloc was to an undefined symbol, |
2217 | we have already printed one error message and there | |
2218 | is no point complaining again. */ | |
2219 | if ((! h || | |
2220 | h->root.type != bfd_link_hash_undefined) | |
2221 | && (!((*info->callbacks->reloc_overflow) | |
2222 | (info, name, howto->name, (bfd_vma) 0, | |
2223 | input_bfd, input_section, rel->r_offset)))) | |
b34976b6 | 2224 | return FALSE; |
252b5132 RH |
2225 | break; |
2226 | ||
2227 | case bfd_reloc_undefined: | |
2228 | if (!((*info->callbacks->undefined_symbol) | |
2229 | (info, name, input_bfd, input_section, | |
b34976b6 AM |
2230 | rel->r_offset, TRUE))) |
2231 | return FALSE; | |
252b5132 RH |
2232 | break; |
2233 | ||
2234 | case bfd_reloc_outofrange: | |
9b485d32 | 2235 | msg = _("internal error: out of range error"); |
252b5132 RH |
2236 | goto common_error; |
2237 | ||
2238 | case bfd_reloc_notsupported: | |
9b485d32 | 2239 | msg = _("internal error: unsupported relocation error"); |
252b5132 RH |
2240 | goto common_error; |
2241 | ||
2242 | case bfd_reloc_dangerous: | |
9b485d32 | 2243 | msg = _("internal error: dangerous error"); |
252b5132 RH |
2244 | goto common_error; |
2245 | ||
2246 | default: | |
9b485d32 | 2247 | msg = _("internal error: unknown error"); |
252b5132 RH |
2248 | /* fall through */ |
2249 | ||
2250 | common_error: | |
2251 | if (!((*info->callbacks->warning) | |
2252 | (info, msg, name, input_bfd, input_section, | |
2253 | rel->r_offset))) | |
b34976b6 | 2254 | return FALSE; |
252b5132 RH |
2255 | break; |
2256 | } | |
2257 | } | |
2258 | } | |
2259 | ||
b34976b6 | 2260 | return TRUE; |
252b5132 RH |
2261 | } |
2262 | ||
c178919b NC |
2263 | /* Set the right machine number. */ |
2264 | ||
2265 | static bfd_boolean | |
2266 | elf32_arm_object_p (abfd) | |
2267 | bfd *abfd; | |
2268 | { | |
5a6c6817 NC |
2269 | unsigned int mach; |
2270 | ||
2271 | mach = bfd_arm_get_mach_from_notes (abfd, ARM_NOTE_SECTION); | |
c178919b | 2272 | |
5a6c6817 NC |
2273 | if (mach != bfd_mach_arm_unknown) |
2274 | bfd_default_set_arch_mach (abfd, bfd_arch_arm, mach); | |
2275 | ||
2276 | else if (elf_elfheader (abfd)->e_flags & EF_ARM_MAVERICK_FLOAT) | |
2277 | bfd_default_set_arch_mach (abfd, bfd_arch_arm, bfd_mach_arm_ep9312); | |
e16bb312 | 2278 | |
e16bb312 | 2279 | else |
5a6c6817 | 2280 | bfd_default_set_arch_mach (abfd, bfd_arch_arm, mach); |
c178919b NC |
2281 | |
2282 | return TRUE; | |
2283 | } | |
2284 | ||
fc830a83 | 2285 | /* Function to keep ARM specific flags in the ELF header. */ |
b34976b6 | 2286 | static bfd_boolean |
252b5132 RH |
2287 | elf32_arm_set_private_flags (abfd, flags) |
2288 | bfd *abfd; | |
2289 | flagword flags; | |
2290 | { | |
2291 | if (elf_flags_init (abfd) | |
2292 | && elf_elfheader (abfd)->e_flags != flags) | |
2293 | { | |
fc830a83 NC |
2294 | if (EF_ARM_EABI_VERSION (flags) == EF_ARM_EABI_UNKNOWN) |
2295 | { | |
fd2ec330 | 2296 | if (flags & EF_ARM_INTERWORK) |
8f615d07 | 2297 | (*_bfd_error_handler) (_("\ |
ae1a89b7 | 2298 | Warning: Not setting interworking flag of %s since it has already been specified as non-interworking"), |
8f615d07 | 2299 | bfd_archive_filename (abfd)); |
fc830a83 | 2300 | else |
63b0f745 | 2301 | _bfd_error_handler (_("\ |
ae1a89b7 | 2302 | Warning: Clearing the interworking flag of %s due to outside request"), |
63b0f745 | 2303 | bfd_archive_filename (abfd)); |
fc830a83 | 2304 | } |
252b5132 RH |
2305 | } |
2306 | else | |
2307 | { | |
2308 | elf_elfheader (abfd)->e_flags = flags; | |
b34976b6 | 2309 | elf_flags_init (abfd) = TRUE; |
252b5132 RH |
2310 | } |
2311 | ||
b34976b6 | 2312 | return TRUE; |
252b5132 RH |
2313 | } |
2314 | ||
fc830a83 | 2315 | /* Copy backend specific data from one object module to another. */ |
9b485d32 | 2316 | |
b34976b6 | 2317 | static bfd_boolean |
252b5132 RH |
2318 | elf32_arm_copy_private_bfd_data (ibfd, obfd) |
2319 | bfd *ibfd; | |
2320 | bfd *obfd; | |
2321 | { | |
2322 | flagword in_flags; | |
2323 | flagword out_flags; | |
2324 | ||
fc830a83 | 2325 | if ( bfd_get_flavour (ibfd) != bfd_target_elf_flavour |
252b5132 | 2326 | || bfd_get_flavour (obfd) != bfd_target_elf_flavour) |
b34976b6 | 2327 | return TRUE; |
252b5132 | 2328 | |
fc830a83 | 2329 | in_flags = elf_elfheader (ibfd)->e_flags; |
252b5132 RH |
2330 | out_flags = elf_elfheader (obfd)->e_flags; |
2331 | ||
fc830a83 NC |
2332 | if (elf_flags_init (obfd) |
2333 | && EF_ARM_EABI_VERSION (out_flags) == EF_ARM_EABI_UNKNOWN | |
2334 | && in_flags != out_flags) | |
252b5132 | 2335 | { |
252b5132 | 2336 | /* Cannot mix APCS26 and APCS32 code. */ |
fd2ec330 | 2337 | if ((in_flags & EF_ARM_APCS_26) != (out_flags & EF_ARM_APCS_26)) |
b34976b6 | 2338 | return FALSE; |
252b5132 RH |
2339 | |
2340 | /* Cannot mix float APCS and non-float APCS code. */ | |
fd2ec330 | 2341 | if ((in_flags & EF_ARM_APCS_FLOAT) != (out_flags & EF_ARM_APCS_FLOAT)) |
b34976b6 | 2342 | return FALSE; |
252b5132 RH |
2343 | |
2344 | /* If the src and dest have different interworking flags | |
2345 | then turn off the interworking bit. */ | |
fd2ec330 | 2346 | if ((in_flags & EF_ARM_INTERWORK) != (out_flags & EF_ARM_INTERWORK)) |
252b5132 | 2347 | { |
fd2ec330 | 2348 | if (out_flags & EF_ARM_INTERWORK) |
63b0f745 | 2349 | _bfd_error_handler (_("\ |
ae1a89b7 | 2350 | Warning: Clearing the interworking flag of %s because non-interworking code in %s has been linked with it"), |
06317a27 | 2351 | bfd_get_filename (obfd), |
63b0f745 | 2352 | bfd_archive_filename (ibfd)); |
252b5132 | 2353 | |
fd2ec330 | 2354 | in_flags &= ~EF_ARM_INTERWORK; |
252b5132 | 2355 | } |
1006ba19 PB |
2356 | |
2357 | /* Likewise for PIC, though don't warn for this case. */ | |
fd2ec330 PB |
2358 | if ((in_flags & EF_ARM_PIC) != (out_flags & EF_ARM_PIC)) |
2359 | in_flags &= ~EF_ARM_PIC; | |
252b5132 RH |
2360 | } |
2361 | ||
2362 | elf_elfheader (obfd)->e_flags = in_flags; | |
b34976b6 | 2363 | elf_flags_init (obfd) = TRUE; |
252b5132 | 2364 | |
b34976b6 | 2365 | return TRUE; |
252b5132 RH |
2366 | } |
2367 | ||
2368 | /* Merge backend specific data from an object file to the output | |
2369 | object file when linking. */ | |
9b485d32 | 2370 | |
b34976b6 | 2371 | static bfd_boolean |
252b5132 | 2372 | elf32_arm_merge_private_bfd_data (ibfd, obfd) |
fc830a83 NC |
2373 | bfd * ibfd; |
2374 | bfd * obfd; | |
252b5132 RH |
2375 | { |
2376 | flagword out_flags; | |
2377 | flagword in_flags; | |
b34976b6 | 2378 | bfd_boolean flags_compatible = TRUE; |
cf919dfd | 2379 | asection *sec; |
252b5132 | 2380 | |
9b485d32 | 2381 | /* Check if we have the same endianess. */ |
82e51918 | 2382 | if (! _bfd_generic_verify_endian_match (ibfd, obfd)) |
b34976b6 | 2383 | return FALSE; |
1fe494a5 | 2384 | |
252b5132 RH |
2385 | if ( bfd_get_flavour (ibfd) != bfd_target_elf_flavour |
2386 | || bfd_get_flavour (obfd) != bfd_target_elf_flavour) | |
b34976b6 | 2387 | return TRUE; |
252b5132 | 2388 | |
252b5132 RH |
2389 | /* The input BFD must have had its flags initialised. */ |
2390 | /* The following seems bogus to me -- The flags are initialized in | |
2391 | the assembler but I don't think an elf_flags_init field is | |
9b485d32 | 2392 | written into the object. */ |
252b5132 RH |
2393 | /* BFD_ASSERT (elf_flags_init (ibfd)); */ |
2394 | ||
2395 | in_flags = elf_elfheader (ibfd)->e_flags; | |
2396 | out_flags = elf_elfheader (obfd)->e_flags; | |
2397 | ||
2398 | if (!elf_flags_init (obfd)) | |
2399 | { | |
fe077fa6 NC |
2400 | /* If the input is the default architecture and had the default |
2401 | flags then do not bother setting the flags for the output | |
2402 | architecture, instead allow future merges to do this. If no | |
2403 | future merges ever set these flags then they will retain their | |
2404 | uninitialised values, which surprise surprise, correspond | |
252b5132 | 2405 | to the default values. */ |
fe077fa6 NC |
2406 | if (bfd_get_arch_info (ibfd)->the_default |
2407 | && elf_elfheader (ibfd)->e_flags == 0) | |
b34976b6 | 2408 | return TRUE; |
252b5132 | 2409 | |
b34976b6 | 2410 | elf_flags_init (obfd) = TRUE; |
252b5132 RH |
2411 | elf_elfheader (obfd)->e_flags = in_flags; |
2412 | ||
2413 | if (bfd_get_arch (obfd) == bfd_get_arch (ibfd) | |
2414 | && bfd_get_arch_info (obfd)->the_default) | |
2415 | return bfd_set_arch_mach (obfd, bfd_get_arch (ibfd), bfd_get_mach (ibfd)); | |
2416 | ||
b34976b6 | 2417 | return TRUE; |
252b5132 RH |
2418 | } |
2419 | ||
5a6c6817 NC |
2420 | /* Determine what should happen if the input ARM architecture |
2421 | does not match the output ARM architecture. */ | |
2422 | if (! bfd_arm_merge_machines (ibfd, obfd)) | |
2423 | return FALSE; | |
e16bb312 | 2424 | |
1006ba19 | 2425 | /* Identical flags must be compatible. */ |
252b5132 | 2426 | if (in_flags == out_flags) |
b34976b6 | 2427 | return TRUE; |
252b5132 | 2428 | |
35a0f415 DJ |
2429 | /* Check to see if the input BFD actually contains any sections. If |
2430 | not, its flags may not have been initialised either, but it | |
2431 | cannot actually cause any incompatibility. Do not short-circuit | |
2432 | dynamic objects; their section list may be emptied by | |
2433 | elf_link_add_object_symbols. */ | |
2434 | ||
2435 | if (!(ibfd->flags & DYNAMIC)) | |
cf919dfd | 2436 | { |
35a0f415 DJ |
2437 | bfd_boolean null_input_bfd = TRUE; |
2438 | ||
2439 | for (sec = ibfd->sections; sec != NULL; sec = sec->next) | |
cf919dfd | 2440 | { |
35a0f415 DJ |
2441 | /* Ignore synthetic glue sections. */ |
2442 | if (strcmp (sec->name, ".glue_7") | |
2443 | && strcmp (sec->name, ".glue_7t")) | |
2444 | { | |
2445 | null_input_bfd = FALSE; | |
2446 | break; | |
2447 | } | |
cf919dfd | 2448 | } |
35a0f415 DJ |
2449 | if (null_input_bfd) |
2450 | return TRUE; | |
cf919dfd | 2451 | } |
cf919dfd | 2452 | |
252b5132 | 2453 | /* Complain about various flag mismatches. */ |
fc830a83 NC |
2454 | if (EF_ARM_EABI_VERSION (in_flags) != EF_ARM_EABI_VERSION (out_flags)) |
2455 | { | |
63b0f745 | 2456 | _bfd_error_handler (_("\ |
6c571f00 | 2457 | ERROR: %s is compiled for EABI version %d, whereas %s is compiled for version %d"), |
63b0f745 NC |
2458 | bfd_archive_filename (ibfd), |
2459 | (in_flags & EF_ARM_EABIMASK) >> 24, | |
06317a27 | 2460 | bfd_get_filename (obfd), |
63b0f745 | 2461 | (out_flags & EF_ARM_EABIMASK) >> 24); |
b34976b6 | 2462 | return FALSE; |
fc830a83 | 2463 | } |
252b5132 | 2464 | |
1006ba19 PB |
2465 | /* Not sure what needs to be checked for EABI versions >= 1. */ |
2466 | if (EF_ARM_EABI_VERSION (in_flags) == EF_ARM_EABI_UNKNOWN) | |
2467 | { | |
fd2ec330 | 2468 | if ((in_flags & EF_ARM_APCS_26) != (out_flags & EF_ARM_APCS_26)) |
1006ba19 | 2469 | { |
63b0f745 | 2470 | _bfd_error_handler (_("\ |
6c571f00 | 2471 | ERROR: %s is compiled for APCS-%d, whereas target %s uses APCS-%d"), |
63b0f745 NC |
2472 | bfd_archive_filename (ibfd), |
2473 | in_flags & EF_ARM_APCS_26 ? 26 : 32, | |
06317a27 | 2474 | bfd_get_filename (obfd), |
63b0f745 | 2475 | out_flags & EF_ARM_APCS_26 ? 26 : 32); |
b34976b6 | 2476 | flags_compatible = FALSE; |
1006ba19 | 2477 | } |
252b5132 | 2478 | |
fd2ec330 | 2479 | if ((in_flags & EF_ARM_APCS_FLOAT) != (out_flags & EF_ARM_APCS_FLOAT)) |
1006ba19 | 2480 | { |
5eefb65f NC |
2481 | if (in_flags & EF_ARM_APCS_FLOAT) |
2482 | _bfd_error_handler (_("\ | |
6c571f00 | 2483 | ERROR: %s passes floats in float registers, whereas %s passes them in integer registers"), |
5eefb65f NC |
2484 | bfd_archive_filename (ibfd), |
2485 | bfd_get_filename (obfd)); | |
2486 | else | |
2487 | _bfd_error_handler (_("\ | |
6c571f00 | 2488 | ERROR: %s passes floats in integer registers, whereas %s passes them in float registers"), |
5eefb65f NC |
2489 | bfd_archive_filename (ibfd), |
2490 | bfd_get_filename (obfd)); | |
63b0f745 | 2491 | |
b34976b6 | 2492 | flags_compatible = FALSE; |
1006ba19 | 2493 | } |
252b5132 | 2494 | |
96a846ea | 2495 | if ((in_flags & EF_ARM_VFP_FLOAT) != (out_flags & EF_ARM_VFP_FLOAT)) |
1006ba19 | 2496 | { |
96a846ea RE |
2497 | if (in_flags & EF_ARM_VFP_FLOAT) |
2498 | _bfd_error_handler (_("\ | |
fde78edd | 2499 | ERROR: %s uses VFP instructions, whereas %s does not"), |
5eefb65f NC |
2500 | bfd_archive_filename (ibfd), |
2501 | bfd_get_filename (obfd)); | |
2502 | else | |
96a846ea | 2503 | _bfd_error_handler (_("\ |
fde78edd NC |
2504 | ERROR: %s uses FPA instructions, whereas %s does not"), |
2505 | bfd_archive_filename (ibfd), | |
2506 | bfd_get_filename (obfd)); | |
2507 | ||
2508 | flags_compatible = FALSE; | |
2509 | } | |
2510 | ||
2511 | if ((in_flags & EF_ARM_MAVERICK_FLOAT) != (out_flags & EF_ARM_MAVERICK_FLOAT)) | |
2512 | { | |
2513 | if (in_flags & EF_ARM_MAVERICK_FLOAT) | |
2514 | _bfd_error_handler (_("\ | |
2515 | ERROR: %s uses Maverick instructions, whereas %s does not"), | |
2516 | bfd_archive_filename (ibfd), | |
2517 | bfd_get_filename (obfd)); | |
2518 | else | |
2519 | _bfd_error_handler (_("\ | |
5a21e886 | 2520 | ERROR: %s does not use Maverick instructions, whereas %s does"), |
5eefb65f NC |
2521 | bfd_archive_filename (ibfd), |
2522 | bfd_get_filename (obfd)); | |
63b0f745 | 2523 | |
b34976b6 | 2524 | flags_compatible = FALSE; |
1006ba19 | 2525 | } |
96a846ea RE |
2526 | |
2527 | #ifdef EF_ARM_SOFT_FLOAT | |
2528 | if ((in_flags & EF_ARM_SOFT_FLOAT) != (out_flags & EF_ARM_SOFT_FLOAT)) | |
2529 | { | |
2530 | /* We can allow interworking between code that is VFP format | |
2531 | layout, and uses either soft float or integer regs for | |
2532 | passing floating point arguments and results. We already | |
2533 | know that the APCS_FLOAT flags match; similarly for VFP | |
2534 | flags. */ | |
2535 | if ((in_flags & EF_ARM_APCS_FLOAT) != 0 | |
2536 | || (in_flags & EF_ARM_VFP_FLOAT) == 0) | |
2537 | { | |
2538 | if (in_flags & EF_ARM_SOFT_FLOAT) | |
517662d4 | 2539 | _bfd_error_handler (_("\ |
6c571f00 | 2540 | ERROR: %s uses software FP, whereas %s uses hardware FP"), |
96a846ea RE |
2541 | bfd_archive_filename (ibfd), |
2542 | bfd_get_filename (obfd)); | |
2543 | else | |
517662d4 | 2544 | _bfd_error_handler (_("\ |
6c571f00 | 2545 | ERROR: %s uses hardware FP, whereas %s uses software FP"), |
96a846ea RE |
2546 | bfd_archive_filename (ibfd), |
2547 | bfd_get_filename (obfd)); | |
2548 | ||
b34976b6 | 2549 | flags_compatible = FALSE; |
96a846ea RE |
2550 | } |
2551 | } | |
ee43f35e | 2552 | #endif |
252b5132 | 2553 | |
1006ba19 | 2554 | /* Interworking mismatch is only a warning. */ |
fd2ec330 | 2555 | if ((in_flags & EF_ARM_INTERWORK) != (out_flags & EF_ARM_INTERWORK)) |
8f615d07 | 2556 | { |
e3c8793a NC |
2557 | if (in_flags & EF_ARM_INTERWORK) |
2558 | { | |
2559 | _bfd_error_handler (_("\ | |
2560 | Warning: %s supports interworking, whereas %s does not"), | |
2561 | bfd_archive_filename (ibfd), | |
cedb70c5 | 2562 | bfd_get_filename (obfd)); |
e3c8793a NC |
2563 | } |
2564 | else | |
2565 | { | |
2566 | _bfd_error_handler (_("\ | |
2567 | Warning: %s does not support interworking, whereas %s does"), | |
2568 | bfd_archive_filename (ibfd), | |
2569 | bfd_get_filename (obfd)); | |
2570 | } | |
8f615d07 | 2571 | } |
252b5132 | 2572 | } |
63b0f745 | 2573 | |
1006ba19 | 2574 | return flags_compatible; |
252b5132 RH |
2575 | } |
2576 | ||
9b485d32 NC |
2577 | /* Display the flags field. */ |
2578 | ||
b34976b6 | 2579 | static bfd_boolean |
252b5132 RH |
2580 | elf32_arm_print_private_bfd_data (abfd, ptr) |
2581 | bfd *abfd; | |
2582 | PTR ptr; | |
2583 | { | |
fc830a83 NC |
2584 | FILE * file = (FILE *) ptr; |
2585 | unsigned long flags; | |
252b5132 RH |
2586 | |
2587 | BFD_ASSERT (abfd != NULL && ptr != NULL); | |
2588 | ||
2589 | /* Print normal ELF private data. */ | |
2590 | _bfd_elf_print_private_bfd_data (abfd, ptr); | |
2591 | ||
fc830a83 | 2592 | flags = elf_elfheader (abfd)->e_flags; |
9b485d32 NC |
2593 | /* Ignore init flag - it may not be set, despite the flags field |
2594 | containing valid data. */ | |
252b5132 RH |
2595 | |
2596 | /* xgettext:c-format */ | |
9b485d32 | 2597 | fprintf (file, _("private flags = %lx:"), elf_elfheader (abfd)->e_flags); |
252b5132 | 2598 | |
fc830a83 NC |
2599 | switch (EF_ARM_EABI_VERSION (flags)) |
2600 | { | |
2601 | case EF_ARM_EABI_UNKNOWN: | |
4cc11e76 | 2602 | /* The following flag bits are GNU extensions and not part of the |
fc830a83 NC |
2603 | official ARM ELF extended ABI. Hence they are only decoded if |
2604 | the EABI version is not set. */ | |
fd2ec330 | 2605 | if (flags & EF_ARM_INTERWORK) |
9b485d32 | 2606 | fprintf (file, _(" [interworking enabled]")); |
9a5aca8c | 2607 | |
fd2ec330 | 2608 | if (flags & EF_ARM_APCS_26) |
6c571f00 | 2609 | fprintf (file, " [APCS-26]"); |
fc830a83 | 2610 | else |
6c571f00 | 2611 | fprintf (file, " [APCS-32]"); |
9a5aca8c | 2612 | |
96a846ea RE |
2613 | if (flags & EF_ARM_VFP_FLOAT) |
2614 | fprintf (file, _(" [VFP float format]")); | |
fde78edd NC |
2615 | else if (flags & EF_ARM_MAVERICK_FLOAT) |
2616 | fprintf (file, _(" [Maverick float format]")); | |
96a846ea RE |
2617 | else |
2618 | fprintf (file, _(" [FPA float format]")); | |
2619 | ||
fd2ec330 | 2620 | if (flags & EF_ARM_APCS_FLOAT) |
9b485d32 | 2621 | fprintf (file, _(" [floats passed in float registers]")); |
9a5aca8c | 2622 | |
fd2ec330 | 2623 | if (flags & EF_ARM_PIC) |
9b485d32 | 2624 | fprintf (file, _(" [position independent]")); |
fc830a83 | 2625 | |
fd2ec330 | 2626 | if (flags & EF_ARM_NEW_ABI) |
9b485d32 | 2627 | fprintf (file, _(" [new ABI]")); |
9a5aca8c | 2628 | |
fd2ec330 | 2629 | if (flags & EF_ARM_OLD_ABI) |
9b485d32 | 2630 | fprintf (file, _(" [old ABI]")); |
9a5aca8c | 2631 | |
fd2ec330 | 2632 | if (flags & EF_ARM_SOFT_FLOAT) |
9b485d32 | 2633 | fprintf (file, _(" [software FP]")); |
9a5aca8c | 2634 | |
96a846ea RE |
2635 | flags &= ~(EF_ARM_INTERWORK | EF_ARM_APCS_26 | EF_ARM_APCS_FLOAT |
2636 | | EF_ARM_PIC | EF_ARM_NEW_ABI | EF_ARM_OLD_ABI | |
fde78edd NC |
2637 | | EF_ARM_SOFT_FLOAT | EF_ARM_VFP_FLOAT |
2638 | | EF_ARM_MAVERICK_FLOAT); | |
fc830a83 | 2639 | break; |
9a5aca8c | 2640 | |
fc830a83 | 2641 | case EF_ARM_EABI_VER1: |
9b485d32 | 2642 | fprintf (file, _(" [Version1 EABI]")); |
9a5aca8c | 2643 | |
fc830a83 | 2644 | if (flags & EF_ARM_SYMSARESORTED) |
9b485d32 | 2645 | fprintf (file, _(" [sorted symbol table]")); |
fc830a83 | 2646 | else |
9b485d32 | 2647 | fprintf (file, _(" [unsorted symbol table]")); |
9a5aca8c | 2648 | |
fc830a83 NC |
2649 | flags &= ~ EF_ARM_SYMSARESORTED; |
2650 | break; | |
9a5aca8c | 2651 | |
fd2ec330 PB |
2652 | case EF_ARM_EABI_VER2: |
2653 | fprintf (file, _(" [Version2 EABI]")); | |
2654 | ||
2655 | if (flags & EF_ARM_SYMSARESORTED) | |
2656 | fprintf (file, _(" [sorted symbol table]")); | |
2657 | else | |
2658 | fprintf (file, _(" [unsorted symbol table]")); | |
2659 | ||
2660 | if (flags & EF_ARM_DYNSYMSUSESEGIDX) | |
2661 | fprintf (file, _(" [dynamic symbols use segment index]")); | |
2662 | ||
2663 | if (flags & EF_ARM_MAPSYMSFIRST) | |
2664 | fprintf (file, _(" [mapping symbols precede others]")); | |
2665 | ||
99e4ae17 | 2666 | flags &= ~(EF_ARM_SYMSARESORTED | EF_ARM_DYNSYMSUSESEGIDX |
fd2ec330 PB |
2667 | | EF_ARM_MAPSYMSFIRST); |
2668 | break; | |
2669 | ||
fc830a83 | 2670 | default: |
9b485d32 | 2671 | fprintf (file, _(" <EABI version unrecognised>")); |
fc830a83 NC |
2672 | break; |
2673 | } | |
252b5132 | 2674 | |
fc830a83 | 2675 | flags &= ~ EF_ARM_EABIMASK; |
252b5132 | 2676 | |
fc830a83 | 2677 | if (flags & EF_ARM_RELEXEC) |
9b485d32 | 2678 | fprintf (file, _(" [relocatable executable]")); |
252b5132 | 2679 | |
fc830a83 | 2680 | if (flags & EF_ARM_HASENTRY) |
9b485d32 | 2681 | fprintf (file, _(" [has entry point]")); |
252b5132 | 2682 | |
fc830a83 NC |
2683 | flags &= ~ (EF_ARM_RELEXEC | EF_ARM_HASENTRY); |
2684 | ||
2685 | if (flags) | |
9b485d32 | 2686 | fprintf (file, _("<Unrecognised flag bits set>")); |
9a5aca8c | 2687 | |
252b5132 RH |
2688 | fputc ('\n', file); |
2689 | ||
b34976b6 | 2690 | return TRUE; |
252b5132 RH |
2691 | } |
2692 | ||
2693 | static int | |
2694 | elf32_arm_get_symbol_type (elf_sym, type) | |
2695 | Elf_Internal_Sym * elf_sym; | |
2696 | int type; | |
2697 | { | |
2f0ca46a NC |
2698 | switch (ELF_ST_TYPE (elf_sym->st_info)) |
2699 | { | |
2700 | case STT_ARM_TFUNC: | |
2701 | return ELF_ST_TYPE (elf_sym->st_info); | |
ce855c42 | 2702 | |
2f0ca46a NC |
2703 | case STT_ARM_16BIT: |
2704 | /* If the symbol is not an object, return the STT_ARM_16BIT flag. | |
2705 | This allows us to distinguish between data used by Thumb instructions | |
2706 | and non-data (which is probably code) inside Thumb regions of an | |
2707 | executable. */ | |
2708 | if (type != STT_OBJECT) | |
2709 | return ELF_ST_TYPE (elf_sym->st_info); | |
2710 | break; | |
9a5aca8c | 2711 | |
ce855c42 NC |
2712 | default: |
2713 | break; | |
2f0ca46a NC |
2714 | } |
2715 | ||
2716 | return type; | |
252b5132 | 2717 | } |
f21f3fe0 | 2718 | |
252b5132 | 2719 | static asection * |
1e2f5b6e AM |
2720 | elf32_arm_gc_mark_hook (sec, info, rel, h, sym) |
2721 | asection *sec; | |
5f771d47 | 2722 | struct bfd_link_info *info ATTRIBUTE_UNUSED; |
252b5132 RH |
2723 | Elf_Internal_Rela *rel; |
2724 | struct elf_link_hash_entry *h; | |
2725 | Elf_Internal_Sym *sym; | |
2726 | { | |
2727 | if (h != NULL) | |
2728 | { | |
2729 | switch (ELF32_R_TYPE (rel->r_info)) | |
2730 | { | |
2731 | case R_ARM_GNU_VTINHERIT: | |
2732 | case R_ARM_GNU_VTENTRY: | |
2733 | break; | |
2734 | ||
2735 | default: | |
2736 | switch (h->root.type) | |
2737 | { | |
2738 | case bfd_link_hash_defined: | |
2739 | case bfd_link_hash_defweak: | |
2740 | return h->root.u.def.section; | |
2741 | ||
2742 | case bfd_link_hash_common: | |
2743 | return h->root.u.c.p->section; | |
e049a0de ILT |
2744 | |
2745 | default: | |
2746 | break; | |
252b5132 RH |
2747 | } |
2748 | } | |
2749 | } | |
2750 | else | |
1e2f5b6e | 2751 | return bfd_section_from_elf_index (sec->owner, sym->st_shndx); |
9ad5cbcf | 2752 | |
252b5132 RH |
2753 | return NULL; |
2754 | } | |
2755 | ||
780a67af NC |
2756 | /* Update the got entry reference counts for the section being removed. */ |
2757 | ||
b34976b6 | 2758 | static bfd_boolean |
252b5132 | 2759 | elf32_arm_gc_sweep_hook (abfd, info, sec, relocs) |
5f771d47 ILT |
2760 | bfd *abfd ATTRIBUTE_UNUSED; |
2761 | struct bfd_link_info *info ATTRIBUTE_UNUSED; | |
2762 | asection *sec ATTRIBUTE_UNUSED; | |
2763 | const Elf_Internal_Rela *relocs ATTRIBUTE_UNUSED; | |
252b5132 | 2764 | { |
5e681ec4 PB |
2765 | Elf_Internal_Shdr *symtab_hdr; |
2766 | struct elf_link_hash_entry **sym_hashes; | |
2767 | bfd_signed_vma *local_got_refcounts; | |
2768 | const Elf_Internal_Rela *rel, *relend; | |
2769 | unsigned long r_symndx; | |
2770 | struct elf_link_hash_entry *h; | |
2771 | ||
2772 | elf_section_data (sec)->local_dynrel = NULL; | |
2773 | ||
2774 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
2775 | sym_hashes = elf_sym_hashes (abfd); | |
2776 | local_got_refcounts = elf_local_got_refcounts (abfd); | |
2777 | ||
2778 | relend = relocs + sec->reloc_count; | |
2779 | for (rel = relocs; rel < relend; rel++) | |
2780 | switch (ELF32_R_TYPE (rel->r_info)) | |
2781 | { | |
2782 | case R_ARM_GOT32: | |
2783 | r_symndx = ELF32_R_SYM (rel->r_info); | |
2784 | if (r_symndx >= symtab_hdr->sh_info) | |
2785 | { | |
2786 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
2787 | if (h->got.refcount > 0) | |
2788 | h->got.refcount -= 1; | |
2789 | } | |
2790 | else if (local_got_refcounts != NULL) | |
2791 | { | |
2792 | if (local_got_refcounts[r_symndx] > 0) | |
2793 | local_got_refcounts[r_symndx] -= 1; | |
2794 | } | |
2795 | break; | |
2796 | ||
2797 | case R_ARM_ABS32: | |
2798 | case R_ARM_REL32: | |
2799 | case R_ARM_PC24: | |
7359ea65 | 2800 | case R_ARM_PLT32: |
5e681ec4 PB |
2801 | r_symndx = ELF32_R_SYM (rel->r_info); |
2802 | if (r_symndx >= symtab_hdr->sh_info) | |
2803 | { | |
2804 | struct elf32_arm_link_hash_entry *eh; | |
2805 | struct elf32_arm_relocs_copied **pp; | |
2806 | struct elf32_arm_relocs_copied *p; | |
2807 | ||
2808 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
2809 | ||
7359ea65 | 2810 | if (h->plt.refcount > 0) |
5e681ec4 PB |
2811 | h->plt.refcount -= 1; |
2812 | ||
7359ea65 DJ |
2813 | if (ELF32_R_TYPE (rel->r_info) == R_ARM_ABS32 |
2814 | || ELF32_R_TYPE (rel->r_info) == R_ARM_REL32) | |
2815 | { | |
2816 | eh = (struct elf32_arm_link_hash_entry *) h; | |
5e681ec4 | 2817 | |
7359ea65 DJ |
2818 | for (pp = &eh->relocs_copied; (p = *pp) != NULL; |
2819 | pp = &p->next) | |
2820 | if (p->section == sec) | |
2821 | { | |
2822 | p->count -= 1; | |
2823 | if (p->count == 0) | |
2824 | *pp = p->next; | |
2825 | break; | |
2826 | } | |
2827 | } | |
5e681ec4 PB |
2828 | } |
2829 | break; | |
2830 | ||
2831 | default: | |
2832 | break; | |
2833 | } | |
2834 | ||
b34976b6 | 2835 | return TRUE; |
252b5132 RH |
2836 | } |
2837 | ||
780a67af NC |
2838 | /* Look through the relocs for a section during the first phase. */ |
2839 | ||
b34976b6 | 2840 | static bfd_boolean |
252b5132 | 2841 | elf32_arm_check_relocs (abfd, info, sec, relocs) |
b34976b6 AM |
2842 | bfd *abfd; |
2843 | struct bfd_link_info *info; | |
2844 | asection *sec; | |
2845 | const Elf_Internal_Rela *relocs; | |
252b5132 | 2846 | { |
b34976b6 AM |
2847 | Elf_Internal_Shdr *symtab_hdr; |
2848 | struct elf_link_hash_entry **sym_hashes; | |
2849 | struct elf_link_hash_entry **sym_hashes_end; | |
2850 | const Elf_Internal_Rela *rel; | |
2851 | const Elf_Internal_Rela *rel_end; | |
2852 | bfd *dynobj; | |
5e681ec4 | 2853 | asection *sreloc; |
b34976b6 | 2854 | bfd_vma *local_got_offsets; |
5e681ec4 | 2855 | struct elf32_arm_link_hash_table *htab; |
9a5aca8c | 2856 | |
1049f94e | 2857 | if (info->relocatable) |
b34976b6 | 2858 | return TRUE; |
9a5aca8c | 2859 | |
5e681ec4 PB |
2860 | htab = elf32_arm_hash_table (info); |
2861 | sreloc = NULL; | |
9a5aca8c | 2862 | |
252b5132 RH |
2863 | dynobj = elf_hash_table (info)->dynobj; |
2864 | local_got_offsets = elf_local_got_offsets (abfd); | |
f21f3fe0 | 2865 | |
252b5132 RH |
2866 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
2867 | sym_hashes = elf_sym_hashes (abfd); | |
9b485d32 NC |
2868 | sym_hashes_end = sym_hashes |
2869 | + symtab_hdr->sh_size / sizeof (Elf32_External_Sym); | |
2870 | ||
252b5132 RH |
2871 | if (!elf_bad_symtab (abfd)) |
2872 | sym_hashes_end -= symtab_hdr->sh_info; | |
9b485d32 | 2873 | |
252b5132 RH |
2874 | rel_end = relocs + sec->reloc_count; |
2875 | for (rel = relocs; rel < rel_end; rel++) | |
2876 | { | |
2877 | struct elf_link_hash_entry *h; | |
2878 | unsigned long r_symndx; | |
9a5aca8c | 2879 | |
252b5132 RH |
2880 | r_symndx = ELF32_R_SYM (rel->r_info); |
2881 | if (r_symndx < symtab_hdr->sh_info) | |
2882 | h = NULL; | |
2883 | else | |
2884 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
9a5aca8c | 2885 | |
252b5132 RH |
2886 | switch (ELF32_R_TYPE (rel->r_info)) |
2887 | { | |
5e681ec4 PB |
2888 | case R_ARM_GOT32: |
2889 | /* This symbol requires a global offset table entry. */ | |
252b5132 RH |
2890 | if (h != NULL) |
2891 | { | |
5e681ec4 | 2892 | h->got.refcount++; |
252b5132 RH |
2893 | } |
2894 | else | |
2895 | { | |
5e681ec4 PB |
2896 | bfd_signed_vma *local_got_refcounts; |
2897 | ||
2898 | /* This is a global offset table entry for a local symbol. */ | |
2899 | local_got_refcounts = elf_local_got_refcounts (abfd); | |
2900 | if (local_got_refcounts == NULL) | |
252b5132 | 2901 | { |
dc810e39 | 2902 | bfd_size_type size; |
252b5132 | 2903 | |
dc810e39 | 2904 | size = symtab_hdr->sh_info; |
5e681ec4 PB |
2905 | size *= (sizeof (bfd_signed_vma) + sizeof(char)); |
2906 | local_got_refcounts = ((bfd_signed_vma *) | |
2907 | bfd_zalloc (abfd, size)); | |
2908 | if (local_got_refcounts == NULL) | |
b34976b6 | 2909 | return FALSE; |
5e681ec4 | 2910 | elf_local_got_refcounts (abfd) = local_got_refcounts; |
252b5132 | 2911 | } |
5e681ec4 | 2912 | local_got_refcounts[r_symndx] += 1; |
252b5132 | 2913 | } |
252b5132 RH |
2914 | break; |
2915 | ||
5e681ec4 PB |
2916 | case R_ARM_GOTOFF: |
2917 | case R_ARM_GOTPC: | |
2918 | if (htab->sgot == NULL) | |
2919 | { | |
2920 | if (htab->root.dynobj == NULL) | |
2921 | htab->root.dynobj = abfd; | |
2922 | if (!create_got_section (htab->root.dynobj, info)) | |
2923 | return FALSE; | |
2924 | } | |
252b5132 RH |
2925 | break; |
2926 | ||
2927 | case R_ARM_ABS32: | |
2928 | case R_ARM_REL32: | |
2929 | case R_ARM_PC24: | |
7359ea65 DJ |
2930 | case R_ARM_PLT32: |
2931 | if (h != NULL) | |
5e681ec4 PB |
2932 | { |
2933 | /* If this reloc is in a read-only section, we might | |
2934 | need a copy reloc. We can't check reliably at this | |
2935 | stage whether the section is read-only, as input | |
2936 | sections have not yet been mapped to output sections. | |
2937 | Tentatively set the flag for now, and correct in | |
2938 | adjust_dynamic_symbol. */ | |
7359ea65 DJ |
2939 | if (!info->shared) |
2940 | h->elf_link_hash_flags |= ELF_LINK_NON_GOT_REF; | |
2941 | ||
5e681ec4 | 2942 | /* We may need a .plt entry if the function this reloc |
c84cd8ee DJ |
2943 | refers to is in a different object. We can't tell for |
2944 | sure yet, because something later might force the | |
2945 | symbol local. */ | |
7359ea65 DJ |
2946 | if (ELF32_R_TYPE (rel->r_info) == R_ARM_PC24 |
2947 | || ELF32_R_TYPE (rel->r_info) == R_ARM_PLT32) | |
c84cd8ee DJ |
2948 | { |
2949 | h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT; | |
2950 | h->plt.refcount += 1; | |
2951 | } | |
5e681ec4 PB |
2952 | } |
2953 | ||
252b5132 RH |
2954 | /* If we are creating a shared library, and this is a reloc |
2955 | against a global symbol, or a non PC relative reloc | |
2956 | against a local symbol, then we need to copy the reloc | |
2957 | into the shared library. However, if we are linking with | |
2958 | -Bsymbolic, we do not need to copy a reloc against a | |
2959 | global symbol which is defined in an object we are | |
2960 | including in the link (i.e., DEF_REGULAR is set). At | |
2961 | this point we have not seen all the input files, so it is | |
2962 | possible that DEF_REGULAR is not set now but will be set | |
2963 | later (it is never cleared). We account for that | |
2964 | possibility below by storing information in the | |
5e681ec4 | 2965 | relocs_copied field of the hash table entry. */ |
252b5132 | 2966 | if (info->shared |
5e681ec4 | 2967 | && (sec->flags & SEC_ALLOC) != 0 |
7359ea65 DJ |
2968 | && ((ELF32_R_TYPE (rel->r_info) != R_ARM_PC24 |
2969 | && ELF32_R_TYPE (rel->r_info) != R_ARM_PLT32) | |
5e681ec4 PB |
2970 | || (h != NULL |
2971 | && (! info->symbolic | |
2972 | || (h->elf_link_hash_flags | |
2973 | & ELF_LINK_HASH_DEF_REGULAR) == 0)))) | |
252b5132 | 2974 | { |
5e681ec4 PB |
2975 | struct elf32_arm_relocs_copied *p, **head; |
2976 | ||
252b5132 RH |
2977 | /* When creating a shared object, we must copy these |
2978 | reloc types into the output file. We create a reloc | |
2979 | section in dynobj and make room for this reloc. */ | |
2980 | if (sreloc == NULL) | |
2981 | { | |
2982 | const char * name; | |
2983 | ||
2984 | name = (bfd_elf_string_from_elf_section | |
2985 | (abfd, | |
2986 | elf_elfheader (abfd)->e_shstrndx, | |
2987 | elf_section_data (sec)->rel_hdr.sh_name)); | |
2988 | if (name == NULL) | |
b34976b6 | 2989 | return FALSE; |
252b5132 RH |
2990 | |
2991 | BFD_ASSERT (strncmp (name, ".rel", 4) == 0 | |
99e4ae17 | 2992 | && strcmp (bfd_get_section_name (abfd, sec), |
252b5132 RH |
2993 | name + 4) == 0); |
2994 | ||
2995 | sreloc = bfd_get_section_by_name (dynobj, name); | |
2996 | if (sreloc == NULL) | |
2997 | { | |
2998 | flagword flags; | |
2999 | ||
3000 | sreloc = bfd_make_section (dynobj, name); | |
3001 | flags = (SEC_HAS_CONTENTS | SEC_READONLY | |
3002 | | SEC_IN_MEMORY | SEC_LINKER_CREATED); | |
3003 | if ((sec->flags & SEC_ALLOC) != 0) | |
3004 | flags |= SEC_ALLOC | SEC_LOAD; | |
3005 | if (sreloc == NULL | |
3006 | || ! bfd_set_section_flags (dynobj, sreloc, flags) | |
3007 | || ! bfd_set_section_alignment (dynobj, sreloc, 2)) | |
b34976b6 | 3008 | return FALSE; |
252b5132 | 3009 | } |
5e681ec4 PB |
3010 | |
3011 | elf_section_data (sec)->sreloc = sreloc; | |
252b5132 RH |
3012 | } |
3013 | ||
5e681ec4 PB |
3014 | /* If this is a global symbol, we count the number of |
3015 | relocations we need for this symbol. */ | |
3016 | if (h != NULL) | |
252b5132 | 3017 | { |
5e681ec4 PB |
3018 | head = &((struct elf32_arm_link_hash_entry *) h)->relocs_copied; |
3019 | } | |
3020 | else | |
3021 | { | |
3022 | /* Track dynamic relocs needed for local syms too. | |
3023 | We really need local syms available to do this | |
3024 | easily. Oh well. */ | |
3025 | ||
3026 | asection *s; | |
3027 | s = bfd_section_from_r_symndx (abfd, &htab->sym_sec, | |
3028 | sec, r_symndx); | |
3029 | if (s == NULL) | |
3030 | return FALSE; | |
3031 | ||
3032 | head = ((struct elf32_arm_relocs_copied **) | |
3033 | &elf_section_data (s)->local_dynrel); | |
3034 | } | |
3035 | ||
3036 | p = *head; | |
3037 | if (p == NULL || p->section != sec) | |
3038 | { | |
3039 | bfd_size_type amt = sizeof *p; | |
3040 | p = bfd_alloc (htab->root.dynobj, amt); | |
252b5132 | 3041 | if (p == NULL) |
5e681ec4 PB |
3042 | return FALSE; |
3043 | p->next = *head; | |
3044 | *head = p; | |
3045 | p->section = sec; | |
3046 | p->count = 0; | |
252b5132 | 3047 | } |
5e681ec4 | 3048 | |
7359ea65 DJ |
3049 | if (ELF32_R_TYPE (rel->r_info) == R_ARM_ABS32 |
3050 | || ELF32_R_TYPE (rel->r_info) == R_ARM_REL32) | |
3051 | p->count += 1; | |
252b5132 RH |
3052 | } |
3053 | break; | |
3054 | ||
3055 | /* This relocation describes the C++ object vtable hierarchy. | |
3056 | Reconstruct it for later use during GC. */ | |
3057 | case R_ARM_GNU_VTINHERIT: | |
3058 | if (!_bfd_elf32_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) | |
b34976b6 | 3059 | return FALSE; |
252b5132 | 3060 | break; |
9a5aca8c | 3061 | |
252b5132 RH |
3062 | /* This relocation describes which C++ vtable entries are actually |
3063 | used. Record for later use during GC. */ | |
3064 | case R_ARM_GNU_VTENTRY: | |
d512aa07 | 3065 | if (!_bfd_elf32_gc_record_vtentry (abfd, sec, h, rel->r_offset)) |
b34976b6 | 3066 | return FALSE; |
252b5132 RH |
3067 | break; |
3068 | } | |
3069 | } | |
f21f3fe0 | 3070 | |
b34976b6 | 3071 | return TRUE; |
252b5132 RH |
3072 | } |
3073 | ||
252b5132 RH |
3074 | /* Find the nearest line to a particular section and offset, for error |
3075 | reporting. This code is a duplicate of the code in elf.c, except | |
9b485d32 | 3076 | that it also accepts STT_ARM_TFUNC as a symbol that names a function. */ |
252b5132 | 3077 | |
b34976b6 | 3078 | static bfd_boolean |
252b5132 RH |
3079 | elf32_arm_find_nearest_line |
3080 | (abfd, section, symbols, offset, filename_ptr, functionname_ptr, line_ptr) | |
b34976b6 AM |
3081 | bfd *abfd; |
3082 | asection *section; | |
3083 | asymbol **symbols; | |
3084 | bfd_vma offset; | |
3085 | const char **filename_ptr; | |
3086 | const char **functionname_ptr; | |
3087 | unsigned int *line_ptr; | |
252b5132 | 3088 | { |
b34976b6 AM |
3089 | bfd_boolean found; |
3090 | const char *filename; | |
3091 | asymbol *func; | |
3092 | bfd_vma low_func; | |
3093 | asymbol **p; | |
252b5132 RH |
3094 | |
3095 | if (_bfd_dwarf2_find_nearest_line (abfd, section, symbols, offset, | |
f21f3fe0 | 3096 | filename_ptr, functionname_ptr, |
857ec808 NC |
3097 | line_ptr, 0, |
3098 | &elf_tdata (abfd)->dwarf2_find_line_info)) | |
b34976b6 | 3099 | return TRUE; |
252b5132 RH |
3100 | |
3101 | if (! _bfd_stab_section_find_nearest_line (abfd, symbols, section, offset, | |
3102 | &found, filename_ptr, | |
3103 | functionname_ptr, line_ptr, | |
3104 | &elf_tdata (abfd)->line_info)) | |
b34976b6 | 3105 | return FALSE; |
f21f3fe0 | 3106 | |
252b5132 | 3107 | if (found) |
b34976b6 | 3108 | return TRUE; |
252b5132 RH |
3109 | |
3110 | if (symbols == NULL) | |
b34976b6 | 3111 | return FALSE; |
252b5132 RH |
3112 | |
3113 | filename = NULL; | |
3114 | func = NULL; | |
3115 | low_func = 0; | |
3116 | ||
3117 | for (p = symbols; *p != NULL; p++) | |
3118 | { | |
3119 | elf_symbol_type *q; | |
3120 | ||
3121 | q = (elf_symbol_type *) *p; | |
3122 | ||
3123 | if (bfd_get_section (&q->symbol) != section) | |
3124 | continue; | |
3125 | ||
3126 | switch (ELF_ST_TYPE (q->internal_elf_sym.st_info)) | |
3127 | { | |
3128 | default: | |
3129 | break; | |
3130 | case STT_FILE: | |
3131 | filename = bfd_asymbol_name (&q->symbol); | |
3132 | break; | |
3133 | case STT_NOTYPE: | |
3134 | case STT_FUNC: | |
3135 | case STT_ARM_TFUNC: | |
3136 | if (q->symbol.section == section | |
3137 | && q->symbol.value >= low_func | |
3138 | && q->symbol.value <= offset) | |
3139 | { | |
3140 | func = (asymbol *) q; | |
3141 | low_func = q->symbol.value; | |
3142 | } | |
3143 | break; | |
3144 | } | |
3145 | } | |
3146 | ||
3147 | if (func == NULL) | |
b34976b6 | 3148 | return FALSE; |
252b5132 RH |
3149 | |
3150 | *filename_ptr = filename; | |
3151 | *functionname_ptr = bfd_asymbol_name (func); | |
3152 | *line_ptr = 0; | |
f21f3fe0 | 3153 | |
b34976b6 | 3154 | return TRUE; |
252b5132 RH |
3155 | } |
3156 | ||
3157 | /* Adjust a symbol defined by a dynamic object and referenced by a | |
3158 | regular object. The current definition is in some section of the | |
3159 | dynamic object, but we're not including those sections. We have to | |
3160 | change the definition to something the rest of the link can | |
3161 | understand. */ | |
3162 | ||
b34976b6 | 3163 | static bfd_boolean |
252b5132 RH |
3164 | elf32_arm_adjust_dynamic_symbol (info, h) |
3165 | struct bfd_link_info * info; | |
3166 | struct elf_link_hash_entry * h; | |
3167 | { | |
3168 | bfd * dynobj; | |
3169 | asection * s; | |
3170 | unsigned int power_of_two; | |
3171 | ||
3172 | dynobj = elf_hash_table (info)->dynobj; | |
3173 | ||
3174 | /* Make sure we know what is going on here. */ | |
3175 | BFD_ASSERT (dynobj != NULL | |
3176 | && ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) | |
3177 | || h->weakdef != NULL | |
3178 | || ((h->elf_link_hash_flags | |
3179 | & ELF_LINK_HASH_DEF_DYNAMIC) != 0 | |
3180 | && (h->elf_link_hash_flags | |
3181 | & ELF_LINK_HASH_REF_REGULAR) != 0 | |
3182 | && (h->elf_link_hash_flags | |
3183 | & ELF_LINK_HASH_DEF_REGULAR) == 0))); | |
3184 | ||
3185 | /* If this is a function, put it in the procedure linkage table. We | |
3186 | will fill in the contents of the procedure linkage table later, | |
3187 | when we know the address of the .got section. */ | |
24a1ba0f | 3188 | if (h->type == STT_FUNC |
252b5132 RH |
3189 | || (h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0) |
3190 | { | |
5e681ec4 PB |
3191 | if (h->plt.refcount <= 0 |
3192 | || SYMBOL_CALLS_LOCAL (info, h) | |
3193 | || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT | |
3194 | && h->root.type == bfd_link_hash_undefweak)) | |
252b5132 RH |
3195 | { |
3196 | /* This case can occur if we saw a PLT32 reloc in an input | |
5e681ec4 PB |
3197 | file, but the symbol was never referred to by a dynamic |
3198 | object, or if all references were garbage collected. In | |
3199 | such a case, we don't actually need to build a procedure | |
3200 | linkage table, and we can just do a PC24 reloc instead. */ | |
3201 | h->plt.offset = (bfd_vma) -1; | |
9d7404b7 | 3202 | h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT; |
252b5132 RH |
3203 | } |
3204 | ||
b34976b6 | 3205 | return TRUE; |
252b5132 | 3206 | } |
5e681ec4 PB |
3207 | else |
3208 | /* It's possible that we incorrectly decided a .plt reloc was | |
3209 | needed for an R_ARM_PC24 reloc to a non-function sym in | |
3210 | check_relocs. We can't decide accurately between function and | |
3211 | non-function syms in check-relocs; Objects loaded later in | |
3212 | the link may change h->type. So fix it now. */ | |
3213 | h->plt.offset = (bfd_vma) -1; | |
252b5132 RH |
3214 | |
3215 | /* If this is a weak symbol, and there is a real definition, the | |
3216 | processor independent code will have arranged for us to see the | |
3217 | real definition first, and we can just use the same value. */ | |
3218 | if (h->weakdef != NULL) | |
3219 | { | |
3220 | BFD_ASSERT (h->weakdef->root.type == bfd_link_hash_defined | |
3221 | || h->weakdef->root.type == bfd_link_hash_defweak); | |
3222 | h->root.u.def.section = h->weakdef->root.u.def.section; | |
3223 | h->root.u.def.value = h->weakdef->root.u.def.value; | |
b34976b6 | 3224 | return TRUE; |
252b5132 RH |
3225 | } |
3226 | ||
3227 | /* This is a reference to a symbol defined by a dynamic object which | |
3228 | is not a function. */ | |
3229 | ||
3230 | /* If we are creating a shared library, we must presume that the | |
3231 | only references to the symbol are via the global offset table. | |
3232 | For such cases we need not do anything here; the relocations will | |
3233 | be handled correctly by relocate_section. */ | |
3234 | if (info->shared) | |
b34976b6 | 3235 | return TRUE; |
252b5132 RH |
3236 | |
3237 | /* We must allocate the symbol in our .dynbss section, which will | |
3238 | become part of the .bss section of the executable. There will be | |
3239 | an entry for this symbol in the .dynsym section. The dynamic | |
3240 | object will contain position independent code, so all references | |
3241 | from the dynamic object to this symbol will go through the global | |
3242 | offset table. The dynamic linker will use the .dynsym entry to | |
3243 | determine the address it must put in the global offset table, so | |
3244 | both the dynamic object and the regular object will refer to the | |
3245 | same memory location for the variable. */ | |
252b5132 RH |
3246 | s = bfd_get_section_by_name (dynobj, ".dynbss"); |
3247 | BFD_ASSERT (s != NULL); | |
3248 | ||
3249 | /* We must generate a R_ARM_COPY reloc to tell the dynamic linker to | |
3250 | copy the initial value out of the dynamic object and into the | |
3251 | runtime process image. We need to remember the offset into the | |
3252 | .rel.bss section we are going to use. */ | |
3253 | if ((h->root.u.def.section->flags & SEC_ALLOC) != 0) | |
3254 | { | |
3255 | asection *srel; | |
3256 | ||
3257 | srel = bfd_get_section_by_name (dynobj, ".rel.bss"); | |
3258 | BFD_ASSERT (srel != NULL); | |
3259 | srel->_raw_size += sizeof (Elf32_External_Rel); | |
3260 | h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_COPY; | |
3261 | } | |
3262 | ||
3263 | /* We need to figure out the alignment required for this symbol. I | |
3264 | have no idea how ELF linkers handle this. */ | |
3265 | power_of_two = bfd_log2 (h->size); | |
3266 | if (power_of_two > 3) | |
3267 | power_of_two = 3; | |
3268 | ||
3269 | /* Apply the required alignment. */ | |
3270 | s->_raw_size = BFD_ALIGN (s->_raw_size, | |
3271 | (bfd_size_type) (1 << power_of_two)); | |
3272 | if (power_of_two > bfd_get_section_alignment (dynobj, s)) | |
3273 | { | |
3274 | if (! bfd_set_section_alignment (dynobj, s, power_of_two)) | |
b34976b6 | 3275 | return FALSE; |
252b5132 RH |
3276 | } |
3277 | ||
3278 | /* Define the symbol as being at this point in the section. */ | |
3279 | h->root.u.def.section = s; | |
3280 | h->root.u.def.value = s->_raw_size; | |
3281 | ||
3282 | /* Increment the section size to make room for the symbol. */ | |
3283 | s->_raw_size += h->size; | |
3284 | ||
b34976b6 | 3285 | return TRUE; |
252b5132 RH |
3286 | } |
3287 | ||
5e681ec4 PB |
3288 | /* Allocate space in .plt, .got and associated reloc sections for |
3289 | dynamic relocs. */ | |
3290 | ||
3291 | static bfd_boolean | |
3292 | allocate_dynrelocs (h, inf) | |
3293 | struct elf_link_hash_entry *h; | |
3294 | PTR inf; | |
3295 | { | |
3296 | struct bfd_link_info *info; | |
3297 | struct elf32_arm_link_hash_table *htab; | |
3298 | struct elf32_arm_link_hash_entry *eh; | |
3299 | struct elf32_arm_relocs_copied *p; | |
3300 | ||
3301 | if (h->root.type == bfd_link_hash_indirect) | |
3302 | return TRUE; | |
3303 | ||
3304 | if (h->root.type == bfd_link_hash_warning) | |
3305 | /* When warning symbols are created, they **replace** the "real" | |
3306 | entry in the hash table, thus we never get to see the real | |
3307 | symbol in a hash traversal. So look at it now. */ | |
3308 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
3309 | ||
3310 | info = (struct bfd_link_info *) inf; | |
3311 | htab = elf32_arm_hash_table (info); | |
3312 | ||
3313 | if (htab->root.dynamic_sections_created | |
3314 | && h->plt.refcount > 0) | |
3315 | { | |
3316 | /* Make sure this symbol is output as a dynamic symbol. | |
3317 | Undefined weak syms won't yet be marked as dynamic. */ | |
3318 | if (h->dynindx == -1 | |
3319 | && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0) | |
3320 | { | |
3321 | if (! bfd_elf32_link_record_dynamic_symbol (info, h)) | |
3322 | return FALSE; | |
3323 | } | |
3324 | ||
3325 | if (info->shared | |
7359ea65 | 3326 | || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h)) |
5e681ec4 PB |
3327 | { |
3328 | asection *s = htab->splt; | |
3329 | ||
3330 | /* If this is the first .plt entry, make room for the special | |
3331 | first entry. */ | |
3332 | if (s->_raw_size == 0) | |
3333 | s->_raw_size += PLT_HEADER_SIZE; | |
3334 | ||
3335 | h->plt.offset = s->_raw_size; | |
3336 | ||
3337 | /* If this symbol is not defined in a regular file, and we are | |
3338 | not generating a shared library, then set the symbol to this | |
3339 | location in the .plt. This is required to make function | |
3340 | pointers compare as equal between the normal executable and | |
3341 | the shared library. */ | |
3342 | if (! info->shared | |
3343 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0) | |
3344 | { | |
3345 | h->root.u.def.section = s; | |
3346 | h->root.u.def.value = h->plt.offset; | |
3347 | } | |
3348 | ||
3349 | /* Make room for this entry. */ | |
3350 | s->_raw_size += PLT_ENTRY_SIZE; | |
3351 | ||
3352 | /* We also need to make an entry in the .got.plt section, which | |
3353 | will be placed in the .got section by the linker script. */ | |
3354 | htab->sgotplt->_raw_size += 4; | |
3355 | ||
3356 | /* We also need to make an entry in the .rel.plt section. */ | |
3357 | htab->srelplt->_raw_size += sizeof (Elf32_External_Rel); | |
3358 | } | |
3359 | else | |
3360 | { | |
3361 | h->plt.offset = (bfd_vma) -1; | |
3362 | h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT; | |
3363 | } | |
3364 | } | |
3365 | else | |
3366 | { | |
3367 | h->plt.offset = (bfd_vma) -1; | |
3368 | h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT; | |
3369 | } | |
3370 | ||
3371 | if (h->got.refcount > 0) | |
3372 | { | |
3373 | asection *s; | |
3374 | bfd_boolean dyn; | |
3375 | ||
3376 | /* Make sure this symbol is output as a dynamic symbol. | |
3377 | Undefined weak syms won't yet be marked as dynamic. */ | |
3378 | if (h->dynindx == -1 | |
3379 | && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0) | |
3380 | { | |
3381 | if (! bfd_elf32_link_record_dynamic_symbol (info, h)) | |
3382 | return FALSE; | |
3383 | } | |
3384 | ||
3385 | s = htab->sgot; | |
3386 | h->got.offset = s->_raw_size; | |
3387 | s->_raw_size += 4; | |
3388 | dyn = htab->root.dynamic_sections_created; | |
3389 | if ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT | |
3390 | || h->root.type != bfd_link_hash_undefweak) | |
3391 | && (info->shared | |
3392 | || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))) | |
3393 | htab->srelgot->_raw_size += sizeof (Elf32_External_Rel); | |
3394 | } | |
3395 | else | |
3396 | h->got.offset = (bfd_vma) -1; | |
3397 | ||
3398 | eh = (struct elf32_arm_link_hash_entry *) h; | |
3399 | if (eh->relocs_copied == NULL) | |
3400 | return TRUE; | |
3401 | ||
3402 | /* In the shared -Bsymbolic case, discard space allocated for | |
3403 | dynamic pc-relative relocs against symbols which turn out to be | |
3404 | defined in regular objects. For the normal shared case, discard | |
3405 | space for pc-relative relocs that have become local due to symbol | |
3406 | visibility changes. */ | |
3407 | ||
3408 | if (info->shared) | |
3409 | { | |
7359ea65 DJ |
3410 | /* Discard relocs on undefined weak syms with non-default |
3411 | visibility. */ | |
5e681ec4 PB |
3412 | if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT |
3413 | && h->root.type == bfd_link_hash_undefweak) | |
3414 | eh->relocs_copied = NULL; | |
3415 | } | |
3416 | else | |
3417 | { | |
3418 | /* For the non-shared case, discard space for relocs against | |
3419 | symbols which turn out to need copy relocs or are not | |
3420 | dynamic. */ | |
3421 | ||
3422 | if ((h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0 | |
3423 | && (((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0 | |
3424 | && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0) | |
3425 | || (htab->root.dynamic_sections_created | |
3426 | && (h->root.type == bfd_link_hash_undefweak | |
3427 | || h->root.type == bfd_link_hash_undefined)))) | |
3428 | { | |
3429 | /* Make sure this symbol is output as a dynamic symbol. | |
3430 | Undefined weak syms won't yet be marked as dynamic. */ | |
3431 | if (h->dynindx == -1 | |
3432 | && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0) | |
3433 | { | |
3434 | if (! bfd_elf32_link_record_dynamic_symbol (info, h)) | |
3435 | return FALSE; | |
3436 | } | |
3437 | ||
3438 | /* If that succeeded, we know we'll be keeping all the | |
3439 | relocs. */ | |
3440 | if (h->dynindx != -1) | |
3441 | goto keep; | |
3442 | } | |
3443 | ||
3444 | eh->relocs_copied = NULL; | |
3445 | ||
3446 | keep: ; | |
3447 | } | |
3448 | ||
3449 | /* Finally, allocate space. */ | |
3450 | for (p = eh->relocs_copied; p != NULL; p = p->next) | |
3451 | { | |
3452 | asection *sreloc = elf_section_data (p->section)->sreloc; | |
3453 | sreloc->_raw_size += p->count * sizeof (Elf32_External_Rel); | |
3454 | } | |
3455 | ||
3456 | return TRUE; | |
3457 | } | |
3458 | ||
252b5132 RH |
3459 | /* Set the sizes of the dynamic sections. */ |
3460 | ||
b34976b6 | 3461 | static bfd_boolean |
252b5132 | 3462 | elf32_arm_size_dynamic_sections (output_bfd, info) |
99e4ae17 | 3463 | bfd * output_bfd ATTRIBUTE_UNUSED; |
252b5132 RH |
3464 | struct bfd_link_info * info; |
3465 | { | |
3466 | bfd * dynobj; | |
3467 | asection * s; | |
b34976b6 AM |
3468 | bfd_boolean plt; |
3469 | bfd_boolean relocs; | |
5e681ec4 PB |
3470 | bfd *ibfd; |
3471 | struct elf32_arm_link_hash_table *htab; | |
252b5132 | 3472 | |
5e681ec4 | 3473 | htab = elf32_arm_hash_table (info); |
252b5132 RH |
3474 | dynobj = elf_hash_table (info)->dynobj; |
3475 | BFD_ASSERT (dynobj != NULL); | |
3476 | ||
3477 | if (elf_hash_table (info)->dynamic_sections_created) | |
3478 | { | |
3479 | /* Set the contents of the .interp section to the interpreter. */ | |
893c4fe2 | 3480 | if (info->executable) |
252b5132 RH |
3481 | { |
3482 | s = bfd_get_section_by_name (dynobj, ".interp"); | |
3483 | BFD_ASSERT (s != NULL); | |
3484 | s->_raw_size = sizeof ELF_DYNAMIC_INTERPRETER; | |
3485 | s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER; | |
3486 | } | |
3487 | } | |
5e681ec4 PB |
3488 | |
3489 | /* Set up .got offsets for local syms, and space for local dynamic | |
3490 | relocs. */ | |
3491 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next) | |
252b5132 | 3492 | { |
5e681ec4 PB |
3493 | bfd_signed_vma *local_got; |
3494 | bfd_signed_vma *end_local_got; | |
3495 | char *local_tls_type; | |
3496 | bfd_size_type locsymcount; | |
3497 | Elf_Internal_Shdr *symtab_hdr; | |
3498 | asection *srel; | |
3499 | ||
3500 | if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour) | |
3501 | continue; | |
3502 | ||
3503 | for (s = ibfd->sections; s != NULL; s = s->next) | |
3504 | { | |
3505 | struct elf32_arm_relocs_copied *p; | |
3506 | ||
3507 | for (p = *((struct elf32_arm_relocs_copied **) | |
3508 | &elf_section_data (s)->local_dynrel); | |
3509 | p != NULL; | |
3510 | p = p->next) | |
3511 | { | |
3512 | if (!bfd_is_abs_section (p->section) | |
3513 | && bfd_is_abs_section (p->section->output_section)) | |
3514 | { | |
3515 | /* Input section has been discarded, either because | |
3516 | it is a copy of a linkonce section or due to | |
3517 | linker script /DISCARD/, so we'll be discarding | |
3518 | the relocs too. */ | |
3519 | } | |
3520 | else if (p->count != 0) | |
3521 | { | |
3522 | srel = elf_section_data (p->section)->sreloc; | |
3523 | srel->_raw_size += p->count * sizeof (Elf32_External_Rel); | |
3524 | if ((p->section->output_section->flags & SEC_READONLY) != 0) | |
3525 | info->flags |= DF_TEXTREL; | |
3526 | } | |
3527 | } | |
3528 | } | |
3529 | ||
3530 | local_got = elf_local_got_refcounts (ibfd); | |
3531 | if (!local_got) | |
3532 | continue; | |
3533 | ||
3534 | symtab_hdr = &elf_tdata (ibfd)->symtab_hdr; | |
3535 | locsymcount = symtab_hdr->sh_info; | |
3536 | end_local_got = local_got + locsymcount; | |
3537 | s = htab->sgot; | |
3538 | srel = htab->srelgot; | |
3539 | for (; local_got < end_local_got; ++local_got, ++local_tls_type) | |
3540 | { | |
3541 | if (*local_got > 0) | |
3542 | { | |
3543 | *local_got = s->_raw_size; | |
3544 | s->_raw_size += 4; | |
3545 | if (info->shared) | |
3546 | srel->_raw_size += sizeof (Elf32_External_Rel); | |
3547 | } | |
3548 | else | |
3549 | *local_got = (bfd_vma) -1; | |
3550 | } | |
252b5132 RH |
3551 | } |
3552 | ||
5e681ec4 PB |
3553 | /* Allocate global sym .plt and .got entries, and space for global |
3554 | sym dynamic relocs. */ | |
3555 | elf_link_hash_traverse (&htab->root, allocate_dynrelocs, (PTR) info); | |
252b5132 RH |
3556 | |
3557 | /* The check_relocs and adjust_dynamic_symbol entry points have | |
3558 | determined the sizes of the various dynamic sections. Allocate | |
3559 | memory for them. */ | |
b34976b6 AM |
3560 | plt = FALSE; |
3561 | relocs = FALSE; | |
252b5132 RH |
3562 | for (s = dynobj->sections; s != NULL; s = s->next) |
3563 | { | |
3564 | const char * name; | |
b34976b6 | 3565 | bfd_boolean strip; |
252b5132 RH |
3566 | |
3567 | if ((s->flags & SEC_LINKER_CREATED) == 0) | |
3568 | continue; | |
3569 | ||
3570 | /* It's OK to base decisions on the section name, because none | |
3571 | of the dynobj section names depend upon the input files. */ | |
3572 | name = bfd_get_section_name (dynobj, s); | |
3573 | ||
b34976b6 | 3574 | strip = FALSE; |
252b5132 | 3575 | |
24a1ba0f | 3576 | if (strcmp (name, ".plt") == 0) |
252b5132 RH |
3577 | { |
3578 | if (s->_raw_size == 0) | |
3579 | { | |
3580 | /* Strip this section if we don't need it; see the | |
3581 | comment below. */ | |
b34976b6 | 3582 | strip = TRUE; |
252b5132 RH |
3583 | } |
3584 | else | |
3585 | { | |
3586 | /* Remember whether there is a PLT. */ | |
b34976b6 | 3587 | plt = TRUE; |
252b5132 RH |
3588 | } |
3589 | } | |
3590 | else if (strncmp (name, ".rel", 4) == 0) | |
3591 | { | |
3592 | if (s->_raw_size == 0) | |
3593 | { | |
3594 | /* If we don't need this section, strip it from the | |
3595 | output file. This is mostly to handle .rel.bss and | |
3596 | .rel.plt. We must create both sections in | |
3597 | create_dynamic_sections, because they must be created | |
3598 | before the linker maps input sections to output | |
3599 | sections. The linker does that before | |
3600 | adjust_dynamic_symbol is called, and it is that | |
3601 | function which decides whether anything needs to go | |
3602 | into these sections. */ | |
b34976b6 | 3603 | strip = TRUE; |
252b5132 RH |
3604 | } |
3605 | else | |
3606 | { | |
252b5132 RH |
3607 | /* Remember whether there are any reloc sections other |
3608 | than .rel.plt. */ | |
3609 | if (strcmp (name, ".rel.plt") != 0) | |
b34976b6 | 3610 | relocs = TRUE; |
252b5132 RH |
3611 | |
3612 | /* We use the reloc_count field as a counter if we need | |
3613 | to copy relocs into the output file. */ | |
3614 | s->reloc_count = 0; | |
3615 | } | |
3616 | } | |
3617 | else if (strncmp (name, ".got", 4) != 0) | |
3618 | { | |
3619 | /* It's not one of our sections, so don't allocate space. */ | |
3620 | continue; | |
3621 | } | |
3622 | ||
3623 | if (strip) | |
3624 | { | |
52585bb8 | 3625 | _bfd_strip_section_from_output (info, s); |
252b5132 RH |
3626 | continue; |
3627 | } | |
3628 | ||
3629 | /* Allocate memory for the section contents. */ | |
3630 | s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->_raw_size); | |
3631 | if (s->contents == NULL && s->_raw_size != 0) | |
b34976b6 | 3632 | return FALSE; |
252b5132 RH |
3633 | } |
3634 | ||
3635 | if (elf_hash_table (info)->dynamic_sections_created) | |
3636 | { | |
3637 | /* Add some entries to the .dynamic section. We fill in the | |
3638 | values later, in elf32_arm_finish_dynamic_sections, but we | |
3639 | must add the entries now so that we get the correct size for | |
3640 | the .dynamic section. The DT_DEBUG entry is filled in by the | |
3641 | dynamic linker and used by the debugger. */ | |
dc810e39 AM |
3642 | #define add_dynamic_entry(TAG, VAL) \ |
3643 | bfd_elf32_add_dynamic_entry (info, (bfd_vma) (TAG), (bfd_vma) (VAL)) | |
3644 | ||
3645 | if (!info->shared) | |
252b5132 | 3646 | { |
dc810e39 | 3647 | if (!add_dynamic_entry (DT_DEBUG, 0)) |
b34976b6 | 3648 | return FALSE; |
252b5132 RH |
3649 | } |
3650 | ||
3651 | if (plt) | |
3652 | { | |
dc810e39 AM |
3653 | if ( !add_dynamic_entry (DT_PLTGOT, 0) |
3654 | || !add_dynamic_entry (DT_PLTRELSZ, 0) | |
3655 | || !add_dynamic_entry (DT_PLTREL, DT_REL) | |
3656 | || !add_dynamic_entry (DT_JMPREL, 0)) | |
b34976b6 | 3657 | return FALSE; |
252b5132 RH |
3658 | } |
3659 | ||
3660 | if (relocs) | |
3661 | { | |
dc810e39 AM |
3662 | if ( !add_dynamic_entry (DT_REL, 0) |
3663 | || !add_dynamic_entry (DT_RELSZ, 0) | |
3664 | || !add_dynamic_entry (DT_RELENT, sizeof (Elf32_External_Rel))) | |
b34976b6 | 3665 | return FALSE; |
252b5132 RH |
3666 | } |
3667 | ||
99e4ae17 | 3668 | if ((info->flags & DF_TEXTREL) != 0) |
252b5132 | 3669 | { |
dc810e39 | 3670 | if (!add_dynamic_entry (DT_TEXTREL, 0)) |
b34976b6 | 3671 | return FALSE; |
d6cf2879 | 3672 | info->flags |= DF_TEXTREL; |
252b5132 RH |
3673 | } |
3674 | } | |
dc810e39 | 3675 | #undef add_synamic_entry |
252b5132 | 3676 | |
b34976b6 | 3677 | return TRUE; |
252b5132 RH |
3678 | } |
3679 | ||
252b5132 RH |
3680 | /* Finish up dynamic symbol handling. We set the contents of various |
3681 | dynamic sections here. */ | |
3682 | ||
b34976b6 | 3683 | static bfd_boolean |
252b5132 RH |
3684 | elf32_arm_finish_dynamic_symbol (output_bfd, info, h, sym) |
3685 | bfd * output_bfd; | |
3686 | struct bfd_link_info * info; | |
3687 | struct elf_link_hash_entry * h; | |
3688 | Elf_Internal_Sym * sym; | |
3689 | { | |
3690 | bfd * dynobj; | |
3691 | ||
3692 | dynobj = elf_hash_table (info)->dynobj; | |
3693 | ||
3694 | if (h->plt.offset != (bfd_vma) -1) | |
3695 | { | |
3696 | asection * splt; | |
3697 | asection * sgot; | |
3698 | asection * srel; | |
24a1ba0f NC |
3699 | bfd_vma plt_index; |
3700 | bfd_vma got_offset; | |
947216bf AM |
3701 | Elf_Internal_Rela rel; |
3702 | bfd_byte *loc; | |
5e681ec4 | 3703 | bfd_vma got_displacement; |
252b5132 RH |
3704 | |
3705 | /* This symbol has an entry in the procedure linkage table. Set | |
3706 | it up. */ | |
3707 | ||
3708 | BFD_ASSERT (h->dynindx != -1); | |
3709 | ||
3710 | splt = bfd_get_section_by_name (dynobj, ".plt"); | |
3711 | sgot = bfd_get_section_by_name (dynobj, ".got.plt"); | |
3712 | srel = bfd_get_section_by_name (dynobj, ".rel.plt"); | |
24a1ba0f | 3713 | BFD_ASSERT (splt != NULL && sgot != NULL && srel != NULL); |
252b5132 | 3714 | |
24a1ba0f NC |
3715 | /* Get the index in the procedure linkage table which |
3716 | corresponds to this symbol. This is the index of this symbol | |
3717 | in all the symbols for which we are making plt entries. The | |
3718 | first entry in the procedure linkage table is reserved. */ | |
5e681ec4 | 3719 | plt_index = (h->plt.offset - PLT_HEADER_SIZE) / PLT_ENTRY_SIZE; |
252b5132 | 3720 | |
24a1ba0f NC |
3721 | /* Get the offset into the .got table of the entry that |
3722 | corresponds to this function. Each .got entry is 4 bytes. | |
3723 | The first three are reserved. */ | |
3724 | got_offset = (plt_index + 3) * 4; | |
252b5132 | 3725 | |
5e681ec4 PB |
3726 | /* Calculate the displacement between the PLT slot and the |
3727 | entry in the GOT. */ | |
3728 | got_displacement = (sgot->output_section->vma | |
3729 | + sgot->output_offset | |
3730 | + got_offset | |
3731 | - splt->output_section->vma | |
3732 | - splt->output_offset | |
3733 | - h->plt.offset | |
3734 | - 8); | |
3735 | ||
3736 | BFD_ASSERT ((got_displacement & 0xf0000000) == 0); | |
3737 | ||
252b5132 | 3738 | /* Fill in the entry in the procedure linkage table. */ |
5e681ec4 | 3739 | bfd_put_32 (output_bfd, elf32_arm_plt_entry[0] | ((got_displacement & 0x0ff00000) >> 20), |
24a1ba0f | 3740 | splt->contents + h->plt.offset + 0); |
5e681ec4 | 3741 | bfd_put_32 (output_bfd, elf32_arm_plt_entry[1] | ((got_displacement & 0x000ff000) >> 12), |
24a1ba0f | 3742 | splt->contents + h->plt.offset + 4); |
5e681ec4 | 3743 | bfd_put_32 (output_bfd, elf32_arm_plt_entry[2] | (got_displacement & 0x00000fff), |
24a1ba0f | 3744 | splt->contents + h->plt.offset + 8); |
5e681ec4 PB |
3745 | #ifdef FOUR_WORD_PLT |
3746 | bfd_put_32 (output_bfd, elf32_arm_plt_entry[3], | |
3747 | splt->contents + h->plt.offset + 12); | |
3748 | #endif | |
252b5132 | 3749 | |
24a1ba0f NC |
3750 | /* Fill in the entry in the global offset table. */ |
3751 | bfd_put_32 (output_bfd, | |
3752 | (splt->output_section->vma | |
3753 | + splt->output_offset), | |
3754 | sgot->contents + got_offset); | |
5e681ec4 | 3755 | |
252b5132 RH |
3756 | /* Fill in the entry in the .rel.plt section. */ |
3757 | rel.r_offset = (sgot->output_section->vma | |
3758 | + sgot->output_offset | |
24a1ba0f | 3759 | + got_offset); |
252b5132 | 3760 | rel.r_info = ELF32_R_INFO (h->dynindx, R_ARM_JUMP_SLOT); |
947216bf AM |
3761 | loc = srel->contents + plt_index * sizeof (Elf32_External_Rel); |
3762 | bfd_elf32_swap_reloc_out (output_bfd, &rel, loc); | |
252b5132 RH |
3763 | |
3764 | if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0) | |
3765 | { | |
3766 | /* Mark the symbol as undefined, rather than as defined in | |
3767 | the .plt section. Leave the value alone. */ | |
3768 | sym->st_shndx = SHN_UNDEF; | |
d982ba73 PB |
3769 | /* If the symbol is weak, we do need to clear the value. |
3770 | Otherwise, the PLT entry would provide a definition for | |
3771 | the symbol even if the symbol wasn't defined anywhere, | |
3772 | and so the symbol would never be NULL. */ | |
3773 | if ((h->elf_link_hash_flags & ELF_LINK_HASH_REF_REGULAR_NONWEAK) | |
3774 | == 0) | |
3775 | sym->st_value = 0; | |
252b5132 RH |
3776 | } |
3777 | } | |
3778 | ||
3779 | if (h->got.offset != (bfd_vma) -1) | |
3780 | { | |
3781 | asection * sgot; | |
3782 | asection * srel; | |
947216bf AM |
3783 | Elf_Internal_Rela rel; |
3784 | bfd_byte *loc; | |
252b5132 RH |
3785 | |
3786 | /* This symbol has an entry in the global offset table. Set it | |
3787 | up. */ | |
252b5132 RH |
3788 | sgot = bfd_get_section_by_name (dynobj, ".got"); |
3789 | srel = bfd_get_section_by_name (dynobj, ".rel.got"); | |
3790 | BFD_ASSERT (sgot != NULL && srel != NULL); | |
3791 | ||
3792 | rel.r_offset = (sgot->output_section->vma | |
3793 | + sgot->output_offset | |
dc810e39 | 3794 | + (h->got.offset &~ (bfd_vma) 1)); |
252b5132 | 3795 | |
5e681ec4 PB |
3796 | /* If this is a static link, or it is a -Bsymbolic link and the |
3797 | symbol is defined locally or was forced to be local because | |
3798 | of a version file, we just want to emit a RELATIVE reloc. | |
3799 | The entry in the global offset table will already have been | |
3800 | initialized in the relocate_section function. */ | |
252b5132 | 3801 | if (info->shared |
5e681ec4 PB |
3802 | && SYMBOL_REFERENCES_LOCAL (info, h)) |
3803 | { | |
3804 | BFD_ASSERT((h->got.offset & 1) != 0); | |
3805 | rel.r_info = ELF32_R_INFO (0, R_ARM_RELATIVE); | |
3806 | } | |
252b5132 RH |
3807 | else |
3808 | { | |
5e681ec4 | 3809 | BFD_ASSERT((h->got.offset & 1) == 0); |
252b5132 RH |
3810 | bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + h->got.offset); |
3811 | rel.r_info = ELF32_R_INFO (h->dynindx, R_ARM_GLOB_DAT); | |
3812 | } | |
3813 | ||
947216bf AM |
3814 | loc = srel->contents + srel->reloc_count++ * sizeof (Elf32_External_Rel); |
3815 | bfd_elf32_swap_reloc_out (output_bfd, &rel, loc); | |
252b5132 RH |
3816 | } |
3817 | ||
3818 | if ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_COPY) != 0) | |
3819 | { | |
3820 | asection * s; | |
947216bf AM |
3821 | Elf_Internal_Rela rel; |
3822 | bfd_byte *loc; | |
252b5132 RH |
3823 | |
3824 | /* This symbol needs a copy reloc. Set it up. */ | |
252b5132 RH |
3825 | BFD_ASSERT (h->dynindx != -1 |
3826 | && (h->root.type == bfd_link_hash_defined | |
3827 | || h->root.type == bfd_link_hash_defweak)); | |
3828 | ||
3829 | s = bfd_get_section_by_name (h->root.u.def.section->owner, | |
3830 | ".rel.bss"); | |
3831 | BFD_ASSERT (s != NULL); | |
3832 | ||
3833 | rel.r_offset = (h->root.u.def.value | |
3834 | + h->root.u.def.section->output_section->vma | |
3835 | + h->root.u.def.section->output_offset); | |
3836 | rel.r_info = ELF32_R_INFO (h->dynindx, R_ARM_COPY); | |
947216bf AM |
3837 | loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rel); |
3838 | bfd_elf32_swap_reloc_out (output_bfd, &rel, loc); | |
252b5132 RH |
3839 | } |
3840 | ||
3841 | /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */ | |
3842 | if (strcmp (h->root.root.string, "_DYNAMIC") == 0 | |
3843 | || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0) | |
3844 | sym->st_shndx = SHN_ABS; | |
3845 | ||
b34976b6 | 3846 | return TRUE; |
252b5132 RH |
3847 | } |
3848 | ||
3849 | /* Finish up the dynamic sections. */ | |
3850 | ||
b34976b6 | 3851 | static bfd_boolean |
252b5132 RH |
3852 | elf32_arm_finish_dynamic_sections (output_bfd, info) |
3853 | bfd * output_bfd; | |
3854 | struct bfd_link_info * info; | |
3855 | { | |
3856 | bfd * dynobj; | |
3857 | asection * sgot; | |
3858 | asection * sdyn; | |
3859 | ||
3860 | dynobj = elf_hash_table (info)->dynobj; | |
3861 | ||
3862 | sgot = bfd_get_section_by_name (dynobj, ".got.plt"); | |
3863 | BFD_ASSERT (sgot != NULL); | |
3864 | sdyn = bfd_get_section_by_name (dynobj, ".dynamic"); | |
3865 | ||
3866 | if (elf_hash_table (info)->dynamic_sections_created) | |
3867 | { | |
3868 | asection *splt; | |
3869 | Elf32_External_Dyn *dyncon, *dynconend; | |
3870 | ||
3871 | splt = bfd_get_section_by_name (dynobj, ".plt"); | |
24a1ba0f | 3872 | BFD_ASSERT (splt != NULL && sdyn != NULL); |
252b5132 RH |
3873 | |
3874 | dyncon = (Elf32_External_Dyn *) sdyn->contents; | |
3875 | dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->_raw_size); | |
9b485d32 | 3876 | |
252b5132 RH |
3877 | for (; dyncon < dynconend; dyncon++) |
3878 | { | |
3879 | Elf_Internal_Dyn dyn; | |
3880 | const char * name; | |
3881 | asection * s; | |
3882 | ||
3883 | bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn); | |
3884 | ||
3885 | switch (dyn.d_tag) | |
3886 | { | |
3887 | default: | |
3888 | break; | |
3889 | ||
3890 | case DT_PLTGOT: | |
3891 | name = ".got"; | |
3892 | goto get_vma; | |
3893 | case DT_JMPREL: | |
3894 | name = ".rel.plt"; | |
3895 | get_vma: | |
3896 | s = bfd_get_section_by_name (output_bfd, name); | |
3897 | BFD_ASSERT (s != NULL); | |
3898 | dyn.d_un.d_ptr = s->vma; | |
3899 | bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); | |
3900 | break; | |
3901 | ||
3902 | case DT_PLTRELSZ: | |
3903 | s = bfd_get_section_by_name (output_bfd, ".rel.plt"); | |
3904 | BFD_ASSERT (s != NULL); | |
3905 | if (s->_cooked_size != 0) | |
3906 | dyn.d_un.d_val = s->_cooked_size; | |
3907 | else | |
3908 | dyn.d_un.d_val = s->_raw_size; | |
3909 | bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); | |
3910 | break; | |
3911 | ||
3912 | case DT_RELSZ: | |
3913 | /* My reading of the SVR4 ABI indicates that the | |
3914 | procedure linkage table relocs (DT_JMPREL) should be | |
3915 | included in the overall relocs (DT_REL). This is | |
3916 | what Solaris does. However, UnixWare can not handle | |
3917 | that case. Therefore, we override the DT_RELSZ entry | |
3918 | here to make it not include the JMPREL relocs. Since | |
3919 | the linker script arranges for .rel.plt to follow all | |
3920 | other relocation sections, we don't have to worry | |
3921 | about changing the DT_REL entry. */ | |
3922 | s = bfd_get_section_by_name (output_bfd, ".rel.plt"); | |
3923 | if (s != NULL) | |
3924 | { | |
3925 | if (s->_cooked_size != 0) | |
3926 | dyn.d_un.d_val -= s->_cooked_size; | |
3927 | else | |
3928 | dyn.d_un.d_val -= s->_raw_size; | |
3929 | } | |
3930 | bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); | |
3931 | break; | |
88f7bcd5 NC |
3932 | |
3933 | /* Set the bottom bit of DT_INIT/FINI if the | |
3934 | corresponding function is Thumb. */ | |
3935 | case DT_INIT: | |
3936 | name = info->init_function; | |
3937 | goto get_sym; | |
3938 | case DT_FINI: | |
3939 | name = info->fini_function; | |
3940 | get_sym: | |
3941 | /* If it wasn't set by elf_bfd_final_link | |
4cc11e76 | 3942 | then there is nothing to adjust. */ |
88f7bcd5 NC |
3943 | if (dyn.d_un.d_val != 0) |
3944 | { | |
3945 | struct elf_link_hash_entry * eh; | |
3946 | ||
3947 | eh = elf_link_hash_lookup (elf_hash_table (info), name, | |
b34976b6 | 3948 | FALSE, FALSE, TRUE); |
88f7bcd5 NC |
3949 | if (eh != (struct elf_link_hash_entry *) NULL |
3950 | && ELF_ST_TYPE (eh->type) == STT_ARM_TFUNC) | |
3951 | { | |
3952 | dyn.d_un.d_val |= 1; | |
b34976b6 | 3953 | bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); |
88f7bcd5 NC |
3954 | } |
3955 | } | |
3956 | break; | |
252b5132 RH |
3957 | } |
3958 | } | |
3959 | ||
24a1ba0f | 3960 | /* Fill in the first entry in the procedure linkage table. */ |
252b5132 | 3961 | if (splt->_raw_size > 0) |
f7a74f8c | 3962 | { |
5e681ec4 PB |
3963 | bfd_vma got_displacement; |
3964 | ||
3965 | /* Calculate the displacement between the PLT slot and &GOT[0]. */ | |
3966 | got_displacement = (sgot->output_section->vma | |
3967 | + sgot->output_offset | |
3968 | - splt->output_section->vma | |
3969 | - splt->output_offset | |
3970 | - 16); | |
3971 | ||
f7a74f8c NC |
3972 | bfd_put_32 (output_bfd, elf32_arm_plt0_entry[0], splt->contents + 0); |
3973 | bfd_put_32 (output_bfd, elf32_arm_plt0_entry[1], splt->contents + 4); | |
3974 | bfd_put_32 (output_bfd, elf32_arm_plt0_entry[2], splt->contents + 8); | |
3975 | bfd_put_32 (output_bfd, elf32_arm_plt0_entry[3], splt->contents + 12); | |
5e681ec4 PB |
3976 | #ifdef FOUR_WORD_PLT |
3977 | /* The displacement value goes in the otherwise-unused last word of | |
3978 | the second entry. */ | |
3979 | bfd_put_32 (output_bfd, got_displacement, splt->contents + 28); | |
3980 | #else | |
3981 | bfd_put_32 (output_bfd, got_displacement, splt->contents + 16); | |
3982 | #endif | |
f7a74f8c | 3983 | } |
252b5132 RH |
3984 | |
3985 | /* UnixWare sets the entsize of .plt to 4, although that doesn't | |
3986 | really seem like the right value. */ | |
3987 | elf_section_data (splt->output_section)->this_hdr.sh_entsize = 4; | |
3988 | } | |
3989 | ||
3990 | /* Fill in the first three entries in the global offset table. */ | |
3991 | if (sgot->_raw_size > 0) | |
3992 | { | |
3993 | if (sdyn == NULL) | |
3994 | bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents); | |
3995 | else | |
3996 | bfd_put_32 (output_bfd, | |
3997 | sdyn->output_section->vma + sdyn->output_offset, | |
3998 | sgot->contents); | |
3999 | bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 4); | |
4000 | bfd_put_32 (output_bfd, (bfd_vma) 0, sgot->contents + 8); | |
4001 | } | |
4002 | ||
4003 | elf_section_data (sgot->output_section)->this_hdr.sh_entsize = 4; | |
4004 | ||
b34976b6 | 4005 | return TRUE; |
252b5132 RH |
4006 | } |
4007 | ||
ba96a88f NC |
4008 | static void |
4009 | elf32_arm_post_process_headers (abfd, link_info) | |
4010 | bfd * abfd; | |
5f771d47 | 4011 | struct bfd_link_info * link_info ATTRIBUTE_UNUSED; |
ba96a88f | 4012 | { |
9b485d32 | 4013 | Elf_Internal_Ehdr * i_ehdrp; /* ELF file header, internal form. */ |
ba96a88f NC |
4014 | |
4015 | i_ehdrp = elf_elfheader (abfd); | |
4016 | ||
4017 | i_ehdrp->e_ident[EI_OSABI] = ARM_ELF_OS_ABI_VERSION; | |
4018 | i_ehdrp->e_ident[EI_ABIVERSION] = ARM_ELF_ABI_VERSION; | |
4019 | } | |
4020 | ||
99e4ae17 | 4021 | static enum elf_reloc_type_class |
f51e552e AM |
4022 | elf32_arm_reloc_type_class (rela) |
4023 | const Elf_Internal_Rela *rela; | |
99e4ae17 | 4024 | { |
f51e552e | 4025 | switch ((int) ELF32_R_TYPE (rela->r_info)) |
99e4ae17 AJ |
4026 | { |
4027 | case R_ARM_RELATIVE: | |
4028 | return reloc_class_relative; | |
4029 | case R_ARM_JUMP_SLOT: | |
4030 | return reloc_class_plt; | |
4031 | case R_ARM_COPY: | |
4032 | return reloc_class_copy; | |
4033 | default: | |
4034 | return reloc_class_normal; | |
4035 | } | |
4036 | } | |
4037 | ||
e16bb312 NC |
4038 | static bfd_boolean elf32_arm_section_flags PARAMS ((flagword *, Elf_Internal_Shdr *)); |
4039 | static void elf32_arm_final_write_processing PARAMS ((bfd *, bfd_boolean)); | |
4040 | ||
4041 | /* Set the right machine number for an Arm ELF file. */ | |
4042 | ||
4043 | static bfd_boolean | |
4044 | elf32_arm_section_flags (flags, hdr) | |
4045 | flagword *flags; | |
4046 | Elf_Internal_Shdr *hdr; | |
4047 | { | |
4048 | if (hdr->sh_type == SHT_NOTE) | |
4049 | *flags |= SEC_LINK_ONCE | SEC_LINK_DUPLICATES_SAME_CONTENTS; | |
4050 | ||
4051 | return TRUE; | |
4052 | } | |
4053 | ||
4054 | void | |
4055 | elf32_arm_final_write_processing (abfd, linker) | |
4056 | bfd *abfd; | |
4057 | bfd_boolean linker ATTRIBUTE_UNUSED; | |
4058 | { | |
5a6c6817 | 4059 | bfd_arm_update_notes (abfd, ARM_NOTE_SECTION); |
e16bb312 NC |
4060 | } |
4061 | ||
252b5132 RH |
4062 | #define ELF_ARCH bfd_arch_arm |
4063 | #define ELF_MACHINE_CODE EM_ARM | |
d0facd1b NC |
4064 | #ifdef __QNXTARGET__ |
4065 | #define ELF_MAXPAGESIZE 0x1000 | |
4066 | #else | |
f21f3fe0 | 4067 | #define ELF_MAXPAGESIZE 0x8000 |
d0facd1b | 4068 | #endif |
252b5132 | 4069 | |
99e4ae17 AJ |
4070 | #define bfd_elf32_bfd_copy_private_bfd_data elf32_arm_copy_private_bfd_data |
4071 | #define bfd_elf32_bfd_merge_private_bfd_data elf32_arm_merge_private_bfd_data | |
252b5132 RH |
4072 | #define bfd_elf32_bfd_set_private_flags elf32_arm_set_private_flags |
4073 | #define bfd_elf32_bfd_print_private_bfd_data elf32_arm_print_private_bfd_data | |
4074 | #define bfd_elf32_bfd_link_hash_table_create elf32_arm_link_hash_table_create | |
dc810e39 | 4075 | #define bfd_elf32_bfd_reloc_type_lookup elf32_arm_reloc_type_lookup |
252b5132 RH |
4076 | #define bfd_elf32_find_nearest_line elf32_arm_find_nearest_line |
4077 | ||
4078 | #define elf_backend_get_symbol_type elf32_arm_get_symbol_type | |
4079 | #define elf_backend_gc_mark_hook elf32_arm_gc_mark_hook | |
4080 | #define elf_backend_gc_sweep_hook elf32_arm_gc_sweep_hook | |
4081 | #define elf_backend_check_relocs elf32_arm_check_relocs | |
dc810e39 | 4082 | #define elf_backend_relocate_section elf32_arm_relocate_section |
252b5132 | 4083 | #define elf_backend_adjust_dynamic_symbol elf32_arm_adjust_dynamic_symbol |
5e681ec4 | 4084 | #define elf_backend_create_dynamic_sections elf32_arm_create_dynamic_sections |
252b5132 RH |
4085 | #define elf_backend_finish_dynamic_symbol elf32_arm_finish_dynamic_symbol |
4086 | #define elf_backend_finish_dynamic_sections elf32_arm_finish_dynamic_sections | |
4087 | #define elf_backend_size_dynamic_sections elf32_arm_size_dynamic_sections | |
ba96a88f | 4088 | #define elf_backend_post_process_headers elf32_arm_post_process_headers |
99e4ae17 | 4089 | #define elf_backend_reloc_type_class elf32_arm_reloc_type_class |
c178919b | 4090 | #define elf_backend_object_p elf32_arm_object_p |
e16bb312 NC |
4091 | #define elf_backend_section_flags elf32_arm_section_flags |
4092 | #define elf_backend_final_write_processing elf32_arm_final_write_processing | |
5e681ec4 | 4093 | #define elf_backend_copy_indirect_symbol elf32_arm_copy_indirect_symbol |
252b5132 | 4094 | |
5e681ec4 | 4095 | #define elf_backend_can_refcount 1 |
252b5132 RH |
4096 | #define elf_backend_can_gc_sections 1 |
4097 | #define elf_backend_plt_readonly 1 | |
4098 | #define elf_backend_want_got_plt 1 | |
4099 | #define elf_backend_want_plt_sym 0 | |
acf8aed4 | 4100 | #if !USE_REL |
b491616a AM |
4101 | #define elf_backend_rela_normal 1 |
4102 | #endif | |
252b5132 | 4103 | |
04f7c78d | 4104 | #define elf_backend_got_header_size 12 |
04f7c78d | 4105 | |
252b5132 | 4106 | #include "elf32-target.h" |
7e392df6 | 4107 |