Commit | Line | Data |
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252b5132 | 1 | /* ARC-specific support for 32-bit ELF |
2571583a | 2 | Copyright (C) 1994-2017 Free Software Foundation, Inc. |
886a2506 | 3 | Contributed by Cupertino Miranda (cmiranda@synopsys.com). |
252b5132 | 4 | |
0d2bcfaf | 5 | This file is part of BFD, the Binary File Descriptor library. |
252b5132 | 6 | |
0d2bcfaf NC |
7 | This program is free software; you can redistribute it and/or modify |
8 | it under the terms of the GNU General Public License as published by | |
cd123cb7 | 9 | the Free Software Foundation; either version 3 of the License, or |
0d2bcfaf | 10 | (at your option) any later version. |
252b5132 | 11 | |
0d2bcfaf NC |
12 | This program is distributed in the hope that it will be useful, |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
252b5132 | 16 | |
0d2bcfaf NC |
17 | You should have received a copy of the GNU General Public License |
18 | along with this program; if not, write to the Free Software | |
47b0e7ad NC |
19 | Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, |
20 | MA 02110-1301, USA. */ | |
252b5132 | 21 | |
252b5132 | 22 | #include "sysdep.h" |
3db64b00 | 23 | #include "bfd.h" |
252b5132 RH |
24 | #include "libbfd.h" |
25 | #include "elf-bfd.h" | |
26 | #include "elf/arc.h" | |
ea04a8f6 | 27 | #include "libiberty.h" |
886a2506 | 28 | #include "opcode/arc-func.h" |
4b0c052e | 29 | #include "opcode/arc.h" |
34e967a5 | 30 | #include "arc-plt.h" |
886a2506 | 31 | |
08759e0f | 32 | /* #define ARC_ENABLE_DEBUG 1 */ |
f7e8b360 NC |
33 | #ifdef ARC_ENABLE_DEBUG |
34 | static const char * | |
34e967a5 MC |
35 | name_for_global_symbol (struct elf_link_hash_entry *h) |
36 | { | |
37 | static char *local_str = "(local)"; | |
38 | if (h == NULL) | |
39 | return local_str; | |
f7e8b360 | 40 | return h->root.root.string; |
34e967a5 | 41 | } |
f7e8b360 NC |
42 | #define ARC_DEBUG(fmt, args...) fprintf (stderr, fmt, ##args) |
43 | #else | |
44 | #define ARC_DEBUG(...) | |
34e967a5 MC |
45 | #endif |
46 | ||
47 | ||
48 | #define ADD_RELA(BFD, SECTION, OFFSET, SYM_IDX, TYPE, ADDEND) \ | |
49 | { \ | |
50 | struct elf_link_hash_table *_htab = elf_hash_table (info); \ | |
51 | Elf_Internal_Rela _rel; \ | |
23a42089 | 52 | bfd_byte * _loc; \ |
34e967a5 | 53 | \ |
08759e0f | 54 | BFD_ASSERT (_htab->srel##SECTION &&_htab->srel##SECTION->contents); \ |
23a42089 | 55 | _loc = _htab->srel##SECTION->contents \ |
34e967a5 MC |
56 | + ((_htab->srel##SECTION->reloc_count) \ |
57 | * sizeof (Elf32_External_Rela)); \ | |
58 | _htab->srel##SECTION->reloc_count++; \ | |
59 | _rel.r_addend = ADDEND; \ | |
60 | _rel.r_offset = (_htab->s##SECTION)->output_section->vma \ | |
61 | + (_htab->s##SECTION)->output_offset + OFFSET; \ | |
94e5c971 | 62 | BFD_ASSERT ((long) SYM_IDX != -1); \ |
34e967a5 | 63 | _rel.r_info = ELF32_R_INFO (SYM_IDX, TYPE); \ |
23a42089 | 64 | bfd_elf32_swap_reloca_out (BFD, &_rel, _loc); \ |
34e967a5 | 65 | } |
886a2506 | 66 | |
886a2506 NC |
67 | struct dynamic_sections |
68 | { | |
69 | bfd_boolean initialized; | |
70 | asection * sgot; | |
71 | asection * srelgot; | |
72 | asection * sgotplt; | |
34e967a5 | 73 | asection * srelgotplt; |
886a2506 NC |
74 | asection * sdyn; |
75 | asection * splt; | |
76 | asection * srelplt; | |
77 | }; | |
78 | ||
886a2506 NC |
79 | enum dyn_section_types |
80 | { | |
81 | got = 0, | |
82 | relgot, | |
83 | gotplt, | |
84 | dyn, | |
85 | plt, | |
86 | relplt, | |
87 | DYN_SECTION_TYPES_END | |
88 | }; | |
89 | ||
90 | const char * dyn_section_names[DYN_SECTION_TYPES_END] = | |
91 | { | |
92 | ".got", | |
93 | ".rela.got", | |
94 | ".got.plt", | |
95 | ".dynamic", | |
96 | ".plt", | |
97 | ".rela.plt" | |
98 | }; | |
99 | ||
34e967a5 | 100 | |
886a2506 NC |
101 | /* The default symbols representing the init and fini dyn values. |
102 | TODO: Check what is the relation of those strings with arclinux.em | |
103 | and DT_INIT. */ | |
104 | #define INIT_SYM_STRING "_init" | |
105 | #define FINI_SYM_STRING "_fini" | |
106 | ||
107 | char * init_str = INIT_SYM_STRING; | |
108 | char * fini_str = FINI_SYM_STRING; | |
109 | ||
886a2506 NC |
110 | #define ARC_RELOC_HOWTO(TYPE, VALUE, SIZE, BITSIZE, RELOC_FUNCTION, OVERFLOW, FORMULA) \ |
111 | case VALUE: \ | |
b05a65d0 | 112 | return "R_" #TYPE; \ |
886a2506 NC |
113 | break; |
114 | ||
115 | static ATTRIBUTE_UNUSED const char * | |
116 | reloc_type_to_name (unsigned int type) | |
117 | { | |
118 | switch (type) | |
119 | { | |
120 | #include "elf/arc-reloc.def" | |
121 | ||
122 | default: | |
123 | return "UNKNOWN"; | |
124 | break; | |
125 | } | |
126 | } | |
127 | #undef ARC_RELOC_HOWTO | |
252b5132 | 128 | |
252b5132 RH |
129 | /* Try to minimize the amount of space occupied by relocation tables |
130 | on the ROM (not that the ROM won't be swamped by other ELF overhead). */ | |
0d2bcfaf | 131 | |
886a2506 NC |
132 | #define USE_REL 1 |
133 | ||
134 | static ATTRIBUTE_UNUSED bfd_boolean | |
135 | is_reloc_PC_relative (reloc_howto_type *howto) | |
136 | { | |
137 | return (strstr (howto->name, "PC") != NULL) ? TRUE : FALSE; | |
138 | } | |
139 | ||
140 | static bfd_boolean | |
141 | is_reloc_SDA_relative (reloc_howto_type *howto) | |
142 | { | |
143 | return (strstr (howto->name, "SDA") != NULL) ? TRUE : FALSE; | |
144 | } | |
145 | ||
146 | static bfd_boolean | |
147 | is_reloc_for_GOT (reloc_howto_type * howto) | |
148 | { | |
34e967a5 MC |
149 | if (strstr (howto->name, "TLS") != NULL) |
150 | return FALSE; | |
886a2506 NC |
151 | return (strstr (howto->name, "GOT") != NULL) ? TRUE : FALSE; |
152 | } | |
153 | ||
154 | static bfd_boolean | |
155 | is_reloc_for_PLT (reloc_howto_type * howto) | |
156 | { | |
157 | return (strstr (howto->name, "PLT") != NULL) ? TRUE : FALSE; | |
158 | } | |
159 | ||
34e967a5 MC |
160 | static bfd_boolean |
161 | is_reloc_for_TLS (reloc_howto_type *howto) | |
162 | { | |
163 | return (strstr (howto->name, "TLS") != NULL) ? TRUE : FALSE; | |
164 | } | |
165 | ||
08759e0f CM |
166 | struct arc_relocation_data |
167 | { | |
168 | bfd_signed_vma reloc_offset; | |
169 | bfd_signed_vma reloc_addend; | |
170 | bfd_signed_vma got_offset_value; | |
171 | ||
172 | bfd_signed_vma sym_value; | |
173 | asection * sym_section; | |
174 | ||
175 | reloc_howto_type *howto; | |
176 | ||
177 | asection * input_section; | |
178 | ||
179 | bfd_signed_vma sdata_begin_symbol_vma; | |
180 | bfd_boolean sdata_begin_symbol_vma_set; | |
181 | bfd_signed_vma got_symbol_vma; | |
182 | ||
183 | bfd_boolean should_relocate; | |
184 | ||
185 | const char * symbol_name; | |
186 | }; | |
187 | ||
188 | /* Should be included at this location due to static declarations | |
189 | * defined before this point. */ | |
190 | #include "arc-got.h" | |
191 | ||
886a2506 NC |
192 | #define arc_bfd_get_8(A,B,C) bfd_get_8(A,B) |
193 | #define arc_bfd_get_16(A,B,C) bfd_get_16(A,B) | |
72f3b6aa | 194 | #define arc_bfd_get_32(A,B,C) bfd_get_32(A,B) |
886a2506 NC |
195 | #define arc_bfd_put_8(A,B,C,D) bfd_put_8(A,B,C) |
196 | #define arc_bfd_put_16(A,B,C,D) bfd_put_16(A,B,C) | |
72f3b6aa | 197 | #define arc_bfd_put_32(A,B,C,D) bfd_put_32(A,B,C) |
886a2506 | 198 | |
252b5132 | 199 | |
47b0e7ad | 200 | static bfd_reloc_status_type |
886a2506 NC |
201 | arc_elf_reloc (bfd *abfd ATTRIBUTE_UNUSED, |
202 | arelent *reloc_entry, | |
203 | asymbol *symbol_in, | |
204 | void *data ATTRIBUTE_UNUSED, | |
205 | asection *input_section, | |
206 | bfd *output_bfd, | |
207 | char ** error_message ATTRIBUTE_UNUSED) | |
208 | { | |
209 | if (output_bfd != NULL) | |
210 | { | |
211 | reloc_entry->address += input_section->output_offset; | |
212 | ||
213 | /* In case of relocateable link and if the reloc is against a | |
214 | section symbol, the addend needs to be adjusted according to | |
215 | where the section symbol winds up in the output section. */ | |
216 | if ((symbol_in->flags & BSF_SECTION_SYM) && symbol_in->section) | |
217 | reloc_entry->addend += symbol_in->section->output_offset; | |
218 | ||
219 | return bfd_reloc_ok; | |
220 | } | |
221 | ||
222 | return bfd_reloc_continue; | |
223 | } | |
224 | ||
225 | ||
226 | #define ARC_RELOC_HOWTO(TYPE, VALUE, SIZE, BITSIZE, RELOC_FUNCTION, OVERFLOW, FORMULA) \ | |
227 | TYPE = VALUE, | |
228 | enum howto_list | |
229 | { | |
230 | #include "elf/arc-reloc.def" | |
231 | HOWTO_LIST_LAST | |
232 | }; | |
233 | #undef ARC_RELOC_HOWTO | |
234 | ||
235 | #define ARC_RELOC_HOWTO(TYPE, VALUE, RSIZE, BITSIZE, RELOC_FUNCTION, OVERFLOW, FORMULA) \ | |
f7e8b360 NC |
236 | [TYPE] = HOWTO (R_##TYPE, 0, RSIZE, BITSIZE, FALSE, 0, \ |
237 | complain_overflow_##OVERFLOW, arc_elf_reloc, \ | |
238 | "R_" #TYPE, FALSE, 0, 0, FALSE), | |
886a2506 NC |
239 | |
240 | static struct reloc_howto_struct elf_arc_howto_table[] = | |
241 | { | |
242 | #include "elf/arc-reloc.def" | |
34e967a5 MC |
243 | /* Example of what is generated by the preprocessor. Currently kept as an |
244 | example. | |
886a2506 NC |
245 | HOWTO (R_ARC_NONE, // Type. |
246 | 0, // Rightshift. | |
247 | 2, // Size (0 = byte, 1 = short, 2 = long). | |
248 | 32, // Bitsize. | |
249 | FALSE, // PC_relative. | |
250 | 0, // Bitpos. | |
251 | complain_overflow_bitfield, // Complain_on_overflow. | |
252 | bfd_elf_generic_reloc, // Special_function. | |
253 | "R_ARC_NONE", // Name. | |
254 | TRUE, // Partial_inplace. | |
255 | 0, // Src_mask. | |
256 | 0, // Dst_mask. | |
257 | FALSE), // PCrel_offset. | |
258 | */ | |
259 | }; | |
260 | #undef ARC_RELOC_HOWTO | |
261 | ||
262 | static void arc_elf_howto_init (void) | |
263 | { | |
264 | #define ARC_RELOC_HOWTO(TYPE, VALUE, SIZE, BITSIZE, RELOC_FUNCTION, OVERFLOW, FORMULA) \ | |
6f4b1afc | 265 | elf_arc_howto_table[TYPE].pc_relative = \ |
0a5ff21b | 266 | (strstr (#FORMULA, " P ") != NULL || strstr (#FORMULA, " PDATA ") != NULL); \ |
72f3b6aa CZ |
267 | elf_arc_howto_table[TYPE].dst_mask = RELOC_FUNCTION(0, ~0); \ |
268 | /* Only 32 bit data relocations should be marked as ME. */ \ | |
269 | if (strstr (#FORMULA, " ME ") != NULL) \ | |
270 | { \ | |
271 | BFD_ASSERT (SIZE == 2); \ | |
272 | } | |
886a2506 | 273 | |
34e967a5 | 274 | #include "elf/arc-reloc.def" |
72f3b6aa | 275 | |
47b0e7ad | 276 | } |
886a2506 | 277 | #undef ARC_RELOC_HOWTO |
47b0e7ad | 278 | |
886a2506 NC |
279 | |
280 | #define ARC_RELOC_HOWTO(TYPE, VALUE, SIZE, BITSIZE, RELOC_FUNCTION, OVERFLOW, FORMULA) \ | |
281 | [TYPE] = VALUE, | |
282 | const int howto_table_lookup[] = | |
283 | { | |
34e967a5 | 284 | #include "elf/arc-reloc.def" |
252b5132 | 285 | }; |
886a2506 NC |
286 | #undef ARC_RELOC_HOWTO |
287 | ||
f26dd308 AM |
288 | static reloc_howto_type * |
289 | arc_elf_howto (unsigned int r_type) | |
290 | { | |
291 | if (elf_arc_howto_table[R_ARC_32].dst_mask == 0) | |
292 | arc_elf_howto_init (); | |
293 | return &elf_arc_howto_table[r_type]; | |
294 | } | |
252b5132 RH |
295 | |
296 | /* Map BFD reloc types to ARC ELF reloc types. */ | |
297 | ||
298 | struct arc_reloc_map | |
299 | { | |
34e967a5 | 300 | bfd_reloc_code_real_type bfd_reloc_val; |
08759e0f | 301 | unsigned char elf_reloc_val; |
252b5132 RH |
302 | }; |
303 | ||
8a36df4d CM |
304 | /* ARC ELF linker hash entry. */ |
305 | struct elf_arc_link_hash_entry | |
306 | { | |
307 | struct elf_link_hash_entry root; | |
308 | ||
309 | /* Track dynamic relocs copied for this symbol. */ | |
310 | struct elf_dyn_relocs *dyn_relocs; | |
311 | }; | |
312 | ||
313 | /* ARC ELF linker hash table. */ | |
314 | struct elf_arc_link_hash_table | |
315 | { | |
316 | struct elf_link_hash_table elf; | |
8a36df4d CM |
317 | }; |
318 | ||
319 | static struct bfd_hash_entry * | |
320 | elf_arc_link_hash_newfunc (struct bfd_hash_entry *entry, | |
321 | struct bfd_hash_table *table, | |
322 | const char *string) | |
323 | { | |
324 | /* Allocate the structure if it has not already been allocated by a | |
325 | subclass. */ | |
326 | if (entry == NULL) | |
327 | { | |
328 | entry = (struct bfd_hash_entry *) | |
329 | bfd_hash_allocate (table, | |
330 | sizeof (struct elf_arc_link_hash_entry)); | |
331 | if (entry == NULL) | |
332 | return entry; | |
333 | } | |
334 | ||
335 | /* Call the allocation method of the superclass. */ | |
336 | entry = _bfd_elf_link_hash_newfunc (entry, table, string); | |
337 | if (entry != NULL) | |
338 | { | |
339 | struct elf_arc_link_hash_entry *eh; | |
340 | ||
341 | eh = (struct elf_arc_link_hash_entry *) entry; | |
342 | eh->dyn_relocs = NULL; | |
343 | } | |
344 | ||
345 | return entry; | |
346 | } | |
347 | ||
348 | /* Destroy an ARC ELF linker hash table. */ | |
349 | static void | |
350 | elf_arc_link_hash_table_free (bfd *obfd) | |
351 | { | |
352 | _bfd_elf_link_hash_table_free (obfd); | |
353 | } | |
354 | ||
355 | /* Create an ARC ELF linker hash table. */ | |
356 | ||
357 | static struct bfd_link_hash_table * | |
358 | arc_elf_link_hash_table_create (bfd *abfd) | |
359 | { | |
360 | struct elf_arc_link_hash_table *ret; | |
361 | ||
362 | ret = (struct elf_arc_link_hash_table *) bfd_zmalloc (sizeof (*ret)); | |
363 | if (ret == NULL) | |
364 | return NULL; | |
365 | ||
366 | if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd, | |
367 | elf_arc_link_hash_newfunc, | |
368 | sizeof (struct elf_arc_link_hash_entry), | |
369 | ARC_ELF_DATA)) | |
370 | { | |
371 | free (ret); | |
372 | return NULL; | |
373 | } | |
374 | ||
8a36df4d CM |
375 | ret->elf.init_got_refcount.refcount = 0; |
376 | ret->elf.init_got_refcount.glist = NULL; | |
377 | ret->elf.init_got_offset.offset = 0; | |
378 | ret->elf.init_got_offset.glist = NULL; | |
379 | ||
380 | ret->elf.root.hash_table_free = elf_arc_link_hash_table_free; | |
381 | ||
382 | return &ret->elf.root; | |
383 | } | |
384 | ||
886a2506 NC |
385 | #define ARC_RELOC_HOWTO(TYPE, VALUE, SIZE, BITSIZE, RELOC_FUNCTION, OVERFLOW, FORMULA) \ |
386 | { BFD_RELOC_##TYPE, R_##TYPE }, | |
252b5132 RH |
387 | static const struct arc_reloc_map arc_reloc_map[] = |
388 | { | |
34e967a5 MC |
389 | #include "elf/arc-reloc.def" |
390 | ||
886a2506 NC |
391 | {BFD_RELOC_NONE, R_ARC_NONE}, |
392 | {BFD_RELOC_8, R_ARC_8}, | |
393 | {BFD_RELOC_16, R_ARC_16}, | |
394 | {BFD_RELOC_24, R_ARC_24}, | |
395 | {BFD_RELOC_32, R_ARC_32}, | |
252b5132 | 396 | }; |
886a2506 | 397 | #undef ARC_RELOC_HOWTO |
252b5132 | 398 | |
094fb063 CZ |
399 | typedef ATTRIBUTE_UNUSED bfd_vma (*replace_func) (unsigned, int ATTRIBUTE_UNUSED); |
400 | ||
401 | #define ARC_RELOC_HOWTO(TYPE, VALUE, SIZE, BITSIZE, RELOC_FUNCTION, OVERFLOW, FORMULA) \ | |
402 | case TYPE: \ | |
403 | func = (void *) RELOC_FUNCTION; \ | |
404 | break; | |
405 | static replace_func | |
406 | get_replace_function (bfd *abfd, unsigned int r_type) | |
407 | { | |
408 | void *func = NULL; | |
409 | ||
410 | switch (r_type) | |
411 | { | |
412 | #include "elf/arc-reloc.def" | |
413 | } | |
414 | ||
415 | if (func == replace_bits24 && bfd_big_endian (abfd)) | |
416 | return (replace_func) replace_bits24_be; | |
417 | ||
418 | return (replace_func) func; | |
419 | } | |
420 | #undef ARC_RELOC_HOWTO | |
421 | ||
252b5132 | 422 | static reloc_howto_type * |
34e967a5 | 423 | arc_elf32_bfd_reloc_type_lookup (bfd * abfd ATTRIBUTE_UNUSED, |
47b0e7ad | 424 | bfd_reloc_code_real_type code) |
252b5132 RH |
425 | { |
426 | unsigned int i; | |
427 | ||
ea04a8f6 | 428 | for (i = ARRAY_SIZE (arc_reloc_map); i--;) |
886a2506 NC |
429 | { |
430 | if (arc_reloc_map[i].bfd_reloc_val == code) | |
f26dd308 | 431 | return arc_elf_howto (arc_reloc_map[i].elf_reloc_val); |
886a2506 | 432 | } |
ea04a8f6 | 433 | |
252b5132 RH |
434 | return NULL; |
435 | } | |
436 | ||
34e967a5 MC |
437 | /* Function to set the ELF flag bits. */ |
438 | static bfd_boolean | |
439 | arc_elf_set_private_flags (bfd *abfd, flagword flags) | |
440 | { | |
441 | elf_elfheader (abfd)->e_flags = flags; | |
442 | elf_flags_init (abfd) = TRUE; | |
443 | return TRUE; | |
444 | } | |
445 | ||
446 | /* Print private flags. */ | |
447 | static bfd_boolean | |
448 | arc_elf_print_private_bfd_data (bfd *abfd, void * ptr) | |
449 | { | |
450 | FILE *file = (FILE *) ptr; | |
451 | flagword flags; | |
452 | ||
453 | BFD_ASSERT (abfd != NULL && ptr != NULL); | |
454 | ||
455 | /* Print normal ELF private data. */ | |
456 | _bfd_elf_print_private_bfd_data (abfd, ptr); | |
457 | ||
458 | flags = elf_elfheader (abfd)->e_flags; | |
459 | fprintf (file, _("private flags = 0x%lx:"), (unsigned long) flags); | |
460 | ||
461 | switch (flags & EF_ARC_MACH_MSK) | |
462 | { | |
34e967a5 MC |
463 | case EF_ARC_CPU_ARCV2HS : fprintf (file, " -mcpu=ARCv2HS"); break; |
464 | case EF_ARC_CPU_ARCV2EM : fprintf (file, " -mcpu=ARCv2EM"); break; | |
465 | case E_ARC_MACH_ARC600 : fprintf (file, " -mcpu=ARC600"); break; | |
466 | case E_ARC_MACH_ARC601 : fprintf (file, " -mcpu=ARC601"); break; | |
467 | case E_ARC_MACH_ARC700 : fprintf (file, " -mcpu=ARC700"); break; | |
468 | default: | |
469 | fprintf (file, "-mcpu=unknown"); | |
470 | break; | |
471 | } | |
472 | ||
473 | switch (flags & EF_ARC_OSABI_MSK) | |
474 | { | |
475 | case E_ARC_OSABI_ORIG : fprintf (file, " (ABI:legacy)"); break; | |
476 | case E_ARC_OSABI_V2 : fprintf (file, " (ABI:v2)"); break; | |
477 | case E_ARC_OSABI_V3 : fprintf (file, " (ABI:v3)"); break; | |
478 | default: | |
479 | fprintf (file, "(ABI:unknown)"); | |
480 | break; | |
481 | } | |
482 | ||
483 | fputc ('\n', file); | |
484 | return TRUE; | |
485 | } | |
486 | ||
487 | /* Copy backend specific data from one object module to another. */ | |
488 | ||
489 | static bfd_boolean | |
490 | arc_elf_copy_private_bfd_data (bfd *ibfd, bfd *obfd) | |
491 | { | |
492 | if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour | |
493 | || bfd_get_flavour (obfd) != bfd_target_elf_flavour) | |
494 | return TRUE; | |
495 | ||
496 | BFD_ASSERT (!elf_flags_init (obfd) | |
497 | || elf_elfheader (obfd)->e_flags == elf_elfheader (ibfd)->e_flags); | |
498 | ||
499 | elf_elfheader (obfd)->e_flags = elf_elfheader (ibfd)->e_flags; | |
500 | elf_flags_init (obfd) = TRUE; | |
501 | ||
502 | /* Copy object attributes. */ | |
503 | _bfd_elf_copy_obj_attributes (ibfd, obfd); | |
504 | ||
505 | return _bfd_elf_copy_private_bfd_data (ibfd, obfd); | |
506 | } | |
507 | ||
157090f7 | 508 | static reloc_howto_type * |
34e967a5 MC |
509 | bfd_elf32_bfd_reloc_name_lookup (bfd * abfd ATTRIBUTE_UNUSED, |
510 | const char *r_name) | |
157090f7 AM |
511 | { |
512 | unsigned int i; | |
513 | ||
886a2506 | 514 | for (i = 0; i < ARRAY_SIZE (elf_arc_howto_table); i++) |
157090f7 AM |
515 | if (elf_arc_howto_table[i].name != NULL |
516 | && strcasecmp (elf_arc_howto_table[i].name, r_name) == 0) | |
f26dd308 | 517 | return arc_elf_howto (i); |
157090f7 AM |
518 | |
519 | return NULL; | |
520 | } | |
521 | ||
886a2506 | 522 | /* Set the howto pointer for an ARC ELF reloc. */ |
34e967a5 | 523 | |
252b5132 | 524 | static void |
886a2506 NC |
525 | arc_info_to_howto_rel (bfd * abfd ATTRIBUTE_UNUSED, |
526 | arelent * cache_ptr, | |
527 | Elf_Internal_Rela * dst) | |
252b5132 RH |
528 | { |
529 | unsigned int r_type; | |
530 | ||
531 | r_type = ELF32_R_TYPE (dst->r_info); | |
886a2506 | 532 | BFD_ASSERT (r_type < (unsigned int) R_ARC_max); |
f26dd308 | 533 | cache_ptr->howto = arc_elf_howto (r_type); |
252b5132 RH |
534 | } |
535 | ||
34e967a5 MC |
536 | /* Merge backend specific data from an object file to the output |
537 | object file when linking. */ | |
538 | ||
539 | static bfd_boolean | |
50e03d47 | 540 | arc_elf_merge_private_bfd_data (bfd *ibfd, struct bfd_link_info *info) |
34e967a5 | 541 | { |
50e03d47 | 542 | bfd *obfd = info->output_bfd; |
34e967a5 MC |
543 | unsigned short mach_ibfd; |
544 | static unsigned short mach_obfd = EM_NONE; | |
545 | flagword out_flags; | |
546 | flagword in_flags; | |
547 | asection *sec; | |
548 | ||
549 | /* Check if we have the same endianess. */ | |
50e03d47 | 550 | if (! _bfd_generic_verify_endian_match (ibfd, info)) |
1047201f | 551 | return FALSE; |
34e967a5 MC |
552 | |
553 | /* Collect ELF flags. */ | |
554 | in_flags = elf_elfheader (ibfd)->e_flags & EF_ARC_MACH_MSK; | |
555 | out_flags = elf_elfheader (obfd)->e_flags & EF_ARC_MACH_MSK; | |
556 | ||
557 | if (!elf_flags_init (obfd)) /* First call, no flags set. */ | |
558 | { | |
559 | elf_flags_init (obfd) = TRUE; | |
560 | out_flags = in_flags; | |
561 | } | |
562 | ||
563 | if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour | |
564 | || bfd_get_flavour (obfd) != bfd_target_elf_flavour) | |
565 | return TRUE; | |
566 | ||
567 | /* Check to see if the input BFD actually contains any sections. Do | |
568 | not short-circuit dynamic objects; their section list may be | |
569 | emptied by elf_link_add_object_symbols. */ | |
570 | if (!(ibfd->flags & DYNAMIC)) | |
571 | { | |
572 | bfd_boolean null_input_bfd = TRUE; | |
573 | bfd_boolean only_data_sections = TRUE; | |
574 | ||
575 | for (sec = ibfd->sections; sec != NULL; sec = sec->next) | |
576 | { | |
577 | if ((bfd_get_section_flags (ibfd, sec) | |
578 | & (SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS)) | |
579 | == (SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS)) | |
580 | only_data_sections = FALSE; | |
581 | ||
582 | null_input_bfd = FALSE; | |
583 | } | |
584 | ||
585 | if (null_input_bfd || only_data_sections) | |
586 | return TRUE; | |
587 | } | |
588 | ||
589 | /* Complain about various flag/architecture mismatches. */ | |
590 | mach_ibfd = elf_elfheader (ibfd)->e_machine; | |
591 | if (mach_obfd == EM_NONE) | |
592 | { | |
593 | mach_obfd = mach_ibfd; | |
594 | } | |
595 | else | |
596 | { | |
597 | if (mach_ibfd != mach_obfd) | |
598 | { | |
695344c0 | 599 | /* xgettext:c-format */ |
34e967a5 MC |
600 | _bfd_error_handler (_("ERROR: Attempting to link %B " |
601 | "with a binary %s of different architecture"), | |
602 | ibfd, bfd_get_filename (obfd)); | |
603 | return FALSE; | |
604 | } | |
605 | else if (in_flags != out_flags) | |
606 | { | |
607 | /* Warn if different flags. */ | |
4eca0228 | 608 | _bfd_error_handler |
695344c0 | 609 | /* xgettext:c-format */ |
34e967a5 MC |
610 | (_("%s: uses different e_flags (0x%lx) fields than " |
611 | "previous modules (0x%lx)"), | |
612 | bfd_get_filename (ibfd), (long)in_flags, (long)out_flags); | |
613 | if (in_flags && out_flags) | |
614 | return FALSE; | |
615 | /* MWDT doesnt set the eflags hence make sure we choose the | |
616 | eflags set by gcc. */ | |
617 | in_flags = in_flags > out_flags ? in_flags : out_flags; | |
618 | } | |
619 | } | |
620 | ||
621 | /* Update the flags. */ | |
622 | elf_elfheader (obfd)->e_flags = in_flags; | |
623 | ||
624 | if (bfd_get_mach (obfd) < bfd_get_mach (ibfd)) | |
625 | { | |
626 | return bfd_set_arch_mach (obfd, bfd_arch_arc, bfd_get_mach (ibfd)); | |
627 | } | |
628 | ||
629 | return TRUE; | |
630 | } | |
631 | ||
252b5132 | 632 | /* Set the right machine number for an ARC ELF file. */ |
b34976b6 | 633 | static bfd_boolean |
886a2506 | 634 | arc_elf_object_p (bfd * abfd) |
252b5132 | 635 | { |
886a2506 NC |
636 | /* Make sure this is initialised, or you'll have the potential of passing |
637 | garbage---or misleading values---into the call to | |
638 | bfd_default_set_arch_mach (). */ | |
639 | int mach = bfd_mach_arc_arc700; | |
640 | unsigned long arch = elf_elfheader (abfd)->e_flags & EF_ARC_MACH_MSK; | |
641 | unsigned e_machine = elf_elfheader (abfd)->e_machine; | |
252b5132 | 642 | |
886a2506 | 643 | if (e_machine == EM_ARC_COMPACT || e_machine == EM_ARC_COMPACT2) |
252b5132 | 644 | { |
0d2bcfaf NC |
645 | switch (arch) |
646 | { | |
886a2506 NC |
647 | case E_ARC_MACH_ARC600: |
648 | mach = bfd_mach_arc_arc600; | |
649 | break; | |
650 | case E_ARC_MACH_ARC601: | |
651 | mach = bfd_mach_arc_arc601; | |
652 | break; | |
653 | case E_ARC_MACH_ARC700: | |
654 | mach = bfd_mach_arc_arc700; | |
655 | break; | |
656 | case EF_ARC_CPU_ARCV2HS: | |
657 | case EF_ARC_CPU_ARCV2EM: | |
658 | mach = bfd_mach_arc_arcv2; | |
659 | break; | |
660 | default: | |
08759e0f CM |
661 | mach = (e_machine == EM_ARC_COMPACT) |
662 | ? bfd_mach_arc_arc700 : bfd_mach_arc_arcv2; | |
886a2506 NC |
663 | break; |
664 | } | |
665 | } | |
666 | else | |
667 | { | |
668 | if (e_machine == EM_ARC) | |
669 | { | |
4eca0228 | 670 | _bfd_error_handler |
886a2506 NC |
671 | (_("Error: The ARC4 architecture is no longer supported.\n")); |
672 | return FALSE; | |
673 | } | |
674 | else | |
675 | { | |
4eca0228 | 676 | _bfd_error_handler |
886a2506 NC |
677 | (_("Warning: unset or old architecture flags. \n" |
678 | " Use default machine.\n")); | |
0d2bcfaf | 679 | } |
252b5132 | 680 | } |
886a2506 | 681 | |
0d2bcfaf | 682 | return bfd_default_set_arch_mach (abfd, bfd_arch_arc, mach); |
252b5132 RH |
683 | } |
684 | ||
685 | /* The final processing done just before writing out an ARC ELF object file. | |
686 | This gets the ARC architecture right based on the machine number. */ | |
687 | ||
688 | static void | |
34e967a5 MC |
689 | arc_elf_final_write_processing (bfd * abfd, |
690 | bfd_boolean linker ATTRIBUTE_UNUSED) | |
252b5132 | 691 | { |
886a2506 | 692 | unsigned long emf; |
252b5132 | 693 | |
0d2bcfaf | 694 | switch (bfd_get_mach (abfd)) |
252b5132 | 695 | { |
886a2506 | 696 | case bfd_mach_arc_arc600: |
886a2506 | 697 | emf = EM_ARC_COMPACT; |
0d2bcfaf | 698 | break; |
886a2506 | 699 | case bfd_mach_arc_arc601: |
886a2506 | 700 | emf = EM_ARC_COMPACT; |
0d2bcfaf | 701 | break; |
886a2506 | 702 | case bfd_mach_arc_arc700: |
886a2506 | 703 | emf = EM_ARC_COMPACT; |
0d2bcfaf | 704 | break; |
886a2506 | 705 | case bfd_mach_arc_arcv2: |
886a2506 | 706 | emf = EM_ARC_COMPACT2; |
0d2bcfaf | 707 | break; |
886a2506 | 708 | default: |
3c8adaca | 709 | goto DO_NOTHING; |
252b5132 | 710 | } |
34e967a5 | 711 | |
886a2506 | 712 | elf_elfheader (abfd)->e_machine = emf; |
7e458899 | 713 | |
886a2506 NC |
714 | /* Record whatever is the current syscall ABI version. */ |
715 | elf_elfheader (abfd)->e_flags |= E_ARC_OSABI_CURRENT; | |
3c8adaca CZ |
716 | |
717 | DO_NOTHING: | |
718 | return; | |
252b5132 RH |
719 | } |
720 | ||
f7e8b360 NC |
721 | #ifdef ARC_ENABLE_DEBUG |
722 | #define DEBUG_ARC_RELOC(A) debug_arc_reloc (A) | |
886a2506 NC |
723 | |
724 | static void | |
725 | debug_arc_reloc (struct arc_relocation_data reloc_data) | |
726 | { | |
f7e8b360 NC |
727 | ARC_DEBUG ("Reloc type=%s, should_relocate = %s\n", |
728 | reloc_data.howto->name, | |
729 | reloc_data.should_relocate ? "true" : "false"); | |
730 | ARC_DEBUG (" offset = 0x%x, addend = 0x%x\n", | |
731 | (unsigned int) reloc_data.reloc_offset, | |
732 | (unsigned int) reloc_data.reloc_addend); | |
733 | ARC_DEBUG (" Symbol:\n"); | |
734 | ARC_DEBUG (" value = 0x%08x\n", | |
735 | (unsigned int) reloc_data.sym_value); | |
886a2506 NC |
736 | if (reloc_data.sym_section != NULL) |
737 | { | |
f7e8b360 NC |
738 | ARC_DEBUG (" Symbol Section:\n"); |
739 | ARC_DEBUG (" section name = %s, output_offset 0x%08x", | |
740 | reloc_data.sym_section->name, | |
741 | (unsigned int) reloc_data.sym_section->output_offset); | |
34e967a5 | 742 | if (reloc_data.sym_section->output_section != NULL) |
f7e8b360 | 743 | ARC_DEBUG (", output_section->vma = 0x%08x", |
34e967a5 | 744 | ((unsigned int) reloc_data.sym_section->output_section->vma)); |
f7e8b360 NC |
745 | ARC_DEBUG ("\n"); |
746 | if (reloc_data.sym_section->owner && reloc_data.sym_section->owner->filename) | |
747 | ARC_DEBUG (" file: %s\n", reloc_data.sym_section->owner->filename); | |
886a2506 NC |
748 | } |
749 | else | |
34e967a5 | 750 | { |
f7e8b360 | 751 | ARC_DEBUG (" symbol section is NULL\n"); |
34e967a5 | 752 | } |
886a2506 | 753 | |
f7e8b360 | 754 | ARC_DEBUG (" Input_section:\n"); |
886a2506 NC |
755 | if (reloc_data.input_section != NULL) |
756 | { | |
f7e8b360 NC |
757 | ARC_DEBUG (" section name = %s, output_offset 0x%08x, output_section->vma = 0x%08x\n", |
758 | reloc_data.input_section->name, | |
759 | (unsigned int) reloc_data.input_section->output_offset, | |
760 | (unsigned int) reloc_data.input_section->output_section->vma); | |
761 | ARC_DEBUG (" changed_address = 0x%08x\n", | |
762 | (unsigned int) (reloc_data.input_section->output_section->vma | |
763 | + reloc_data.input_section->output_offset | |
764 | + reloc_data.reloc_offset)); | |
765 | ARC_DEBUG (" file: %s\n", reloc_data.input_section->owner->filename); | |
886a2506 NC |
766 | } |
767 | else | |
34e967a5 | 768 | { |
f7e8b360 | 769 | ARC_DEBUG (" input section is NULL\n"); |
34e967a5 | 770 | } |
886a2506 | 771 | } |
f7e8b360 NC |
772 | #else |
773 | #define DEBUG_ARC_RELOC(A) | |
774 | #endif /* ARC_ENABLE_DEBUG */ | |
886a2506 | 775 | |
72f3b6aa CZ |
776 | static bfd_vma |
777 | middle_endian_convert (bfd_vma insn, bfd_boolean do_it) | |
6f4b1afc | 778 | { |
72f3b6aa CZ |
779 | if (do_it) |
780 | { | |
08759e0f CM |
781 | insn |
782 | = ((insn & 0xffff0000) >> 16) | |
783 | | ((insn & 0xffff) << 16); | |
72f3b6aa CZ |
784 | } |
785 | return insn; | |
6f4b1afc CM |
786 | } |
787 | ||
4b0c052e AB |
788 | /* This function is called for relocations that are otherwise marked as NOT |
789 | requiring overflow checks. In here we perform non-standard checks of | |
790 | the relocation value. */ | |
791 | ||
792 | static inline bfd_reloc_status_type | |
793 | arc_special_overflow_checks (const struct arc_relocation_data reloc_data, | |
08759e0f | 794 | bfd_signed_vma relocation, |
4b0c052e AB |
795 | struct bfd_link_info *info ATTRIBUTE_UNUSED) |
796 | { | |
797 | switch (reloc_data.howto->type) | |
798 | { | |
799 | case R_ARC_NPS_CMEM16: | |
800 | if (((relocation >> 16) & 0xffff) != NPS_CMEM_HIGH_VALUE) | |
08759e0f CM |
801 | { |
802 | if (reloc_data.reloc_addend == 0) | |
4eca0228 | 803 | _bfd_error_handler |
695344c0 | 804 | /* xgettext:c-format */ |
08759e0f CM |
805 | (_("%B(%A+0x%lx): CMEM relocation to `%s' is invalid, " |
806 | "16 MSB should be 0x%04x (value is 0x%lx)"), | |
807 | reloc_data.input_section->owner, | |
808 | reloc_data.input_section, | |
809 | reloc_data.reloc_offset, | |
810 | reloc_data.symbol_name, | |
811 | NPS_CMEM_HIGH_VALUE, | |
812 | (relocation)); | |
813 | else | |
4eca0228 | 814 | _bfd_error_handler |
695344c0 | 815 | /* xgettext:c-format */ |
08759e0f CM |
816 | (_("%B(%A+0x%lx): CMEM relocation to `%s+0x%lx' is invalid, " |
817 | "16 MSB should be 0x%04x (value is 0x%lx)"), | |
818 | reloc_data.input_section->owner, | |
819 | reloc_data.input_section, | |
820 | reloc_data.reloc_offset, | |
821 | reloc_data.symbol_name, | |
822 | reloc_data.reloc_addend, | |
823 | NPS_CMEM_HIGH_VALUE, | |
824 | (relocation)); | |
825 | return bfd_reloc_overflow; | |
826 | } | |
4b0c052e AB |
827 | break; |
828 | ||
829 | default: | |
830 | break; | |
831 | } | |
832 | ||
833 | return bfd_reloc_ok; | |
834 | } | |
835 | ||
72f3b6aa CZ |
836 | #define ME(reloc) (reloc) |
837 | ||
838 | #define IS_ME(FORMULA,BFD) ((strstr (FORMULA, "ME") != NULL) \ | |
839 | && (!bfd_big_endian (BFD))) | |
840 | ||
094fb063 | 841 | #define S ((bfd_signed_vma) (reloc_data.sym_value \ |
34e967a5 MC |
842 | + (reloc_data.sym_section->output_section != NULL ? \ |
843 | (reloc_data.sym_section->output_offset \ | |
094fb063 CZ |
844 | + reloc_data.sym_section->output_section->vma) : 0))) |
845 | #define L ((bfd_signed_vma) (reloc_data.sym_value \ | |
34e967a5 MC |
846 | + (reloc_data.sym_section->output_section != NULL ? \ |
847 | (reloc_data.sym_section->output_offset \ | |
094fb063 | 848 | + reloc_data.sym_section->output_section->vma) : 0))) |
886a2506 NC |
849 | #define A (reloc_data.reloc_addend) |
850 | #define B (0) | |
851 | #define G (reloc_data.got_offset_value) | |
34e967a5 MC |
852 | #define GOT (reloc_data.got_symbol_vma) |
853 | #define GOT_BEGIN (htab->sgot->output_section->vma) | |
854 | ||
886a2506 | 855 | #define MES (0) |
34e967a5 MC |
856 | /* P: relative offset to PCL The offset should be to the |
857 | current location aligned to 32 bits. */ | |
094fb063 | 858 | #define P ((bfd_signed_vma) ( \ |
34e967a5 MC |
859 | ( \ |
860 | (reloc_data.input_section->output_section != NULL ? \ | |
861 | reloc_data.input_section->output_section->vma : 0) \ | |
862 | + reloc_data.input_section->output_offset \ | |
094fb063 CZ |
863 | + (reloc_data.reloc_offset - (bitsize >= 32 ? 4 : 0))) \ |
864 | & ~0x3)) | |
865 | #define PDATA ((bfd_signed_vma) ( \ | |
6f4b1afc CM |
866 | (reloc_data.input_section->output_section->vma \ |
867 | + reloc_data.input_section->output_offset \ | |
094fb063 | 868 | + (reloc_data.reloc_offset)))) |
2ab2f40d CM |
869 | #define SECTSTART (bfd_signed_vma) (reloc_data.sym_section->output_section->vma \ |
870 | + reloc_data.sym_section->output_offset) | |
871 | ||
094fb063 CZ |
872 | #define _SDA_BASE_ (bfd_signed_vma) (reloc_data.sdata_begin_symbol_vma) |
873 | #define TLS_REL (bfd_signed_vma) \ | |
874 | ((elf_hash_table (info))->tls_sec->output_section->vma) | |
34e967a5 MC |
875 | #define TLS_TBSS (8) |
876 | #define TCB_SIZE (8) | |
877 | ||
886a2506 NC |
878 | #define none (0) |
879 | ||
f7e8b360 NC |
880 | #ifdef ARC_ENABLE_DEBUG |
881 | #define PRINT_DEBUG_RELOC_INFO_BEFORE(FORMULA, TYPE) \ | |
882 | do \ | |
883 | { \ | |
884 | asection *sym_section = reloc_data.sym_section; \ | |
885 | asection *input_section = reloc_data.input_section; \ | |
886 | ARC_DEBUG ("RELOC_TYPE = " TYPE "\n"); \ | |
887 | ARC_DEBUG ("FORMULA = " FORMULA "\n"); \ | |
888 | ARC_DEBUG ("S = %#lx\n", S); \ | |
889 | ARC_DEBUG ("A = %#lx\n", A); \ | |
890 | ARC_DEBUG ("L = %lx\n", L); \ | |
891 | if (sym_section->output_section != NULL) \ | |
892 | ARC_DEBUG ("symbol_section->vma = %#lx\n", \ | |
893 | sym_section->output_section->vma \ | |
894 | + sym_section->output_offset); \ | |
895 | else \ | |
896 | ARC_DEBUG ("symbol_section->vma = NULL\n"); \ | |
897 | if (input_section->output_section != NULL) \ | |
898 | ARC_DEBUG ("symbol_section->vma = %#lx\n", \ | |
899 | input_section->output_section->vma \ | |
900 | + input_section->output_offset); \ | |
901 | else \ | |
902 | ARC_DEBUG ("symbol_section->vma = NULL\n"); \ | |
903 | ARC_DEBUG ("PCL = %#lx\n", P); \ | |
904 | ARC_DEBUG ("P = %#lx\n", P); \ | |
905 | ARC_DEBUG ("G = %#lx\n", G); \ | |
906 | ARC_DEBUG ("SDA_OFFSET = %#lx\n", _SDA_BASE_); \ | |
34e967a5 | 907 | ARC_DEBUG ("SDA_SET = %d\n", reloc_data.sdata_begin_symbol_vma_set); \ |
f7e8b360 NC |
908 | ARC_DEBUG ("GOT_OFFSET = %#lx\n", GOT); \ |
909 | ARC_DEBUG ("relocation = %#08lx\n", relocation); \ | |
910 | ARC_DEBUG ("before = %#08x\n", (unsigned) insn); \ | |
911 | ARC_DEBUG ("data = %08x (%u) (%d)\n", (unsigned) relocation, \ | |
912 | (unsigned) relocation, (int) relocation); \ | |
913 | } \ | |
914 | while (0) | |
915 | ||
916 | #define PRINT_DEBUG_RELOC_INFO_AFTER \ | |
917 | do \ | |
918 | { \ | |
919 | ARC_DEBUG ("after = 0x%08x\n", (unsigned int) insn); \ | |
920 | } \ | |
921 | while (0) | |
34e967a5 | 922 | |
f7e8b360 NC |
923 | #else |
924 | ||
925 | #define PRINT_DEBUG_RELOC_INFO_BEFORE(...) | |
926 | #define PRINT_DEBUG_RELOC_INFO_AFTER | |
927 | ||
928 | #endif /* ARC_ENABLE_DEBUG */ | |
34e967a5 | 929 | |
886a2506 | 930 | #define ARC_RELOC_HOWTO(TYPE, VALUE, SIZE, BITSIZE, RELOC_FUNCTION, OVERFLOW, FORMULA) \ |
f7e8b360 NC |
931 | case R_##TYPE: \ |
932 | { \ | |
933 | bfd_signed_vma bitsize ATTRIBUTE_UNUSED = BITSIZE; \ | |
934 | relocation = FORMULA ; \ | |
935 | PRINT_DEBUG_RELOC_INFO_BEFORE (#FORMULA, #TYPE); \ | |
936 | insn = middle_endian_convert (insn, IS_ME (#FORMULA, abfd)); \ | |
937 | insn = (* get_replace_function (abfd, TYPE)) (insn, relocation); \ | |
938 | insn = middle_endian_convert (insn, IS_ME (#FORMULA, abfd)); \ | |
939 | PRINT_DEBUG_RELOC_INFO_AFTER; \ | |
940 | } \ | |
886a2506 NC |
941 | break; |
942 | ||
943 | static bfd_reloc_status_type | |
34e967a5 MC |
944 | arc_do_relocation (bfd_byte * contents, |
945 | struct arc_relocation_data reloc_data, | |
946 | struct bfd_link_info *info) | |
886a2506 | 947 | { |
094fb063 | 948 | bfd_signed_vma relocation = 0; |
886a2506 NC |
949 | bfd_vma insn; |
950 | bfd_vma orig_insn ATTRIBUTE_UNUSED; | |
72f3b6aa | 951 | bfd * abfd = reloc_data.input_section->owner; |
34e967a5 | 952 | struct elf_link_hash_table *htab ATTRIBUTE_UNUSED = elf_hash_table (info); |
4b0c052e | 953 | bfd_reloc_status_type flag; |
886a2506 NC |
954 | |
955 | if (reloc_data.should_relocate == FALSE) | |
34e967a5 | 956 | return bfd_reloc_ok; |
886a2506 NC |
957 | |
958 | switch (reloc_data.howto->size) | |
959 | { | |
960 | case 2: | |
72f3b6aa | 961 | insn = arc_bfd_get_32 (abfd, |
886a2506 NC |
962 | contents + reloc_data.reloc_offset, |
963 | reloc_data.input_section); | |
964 | break; | |
965 | case 1: | |
72f3b6aa CZ |
966 | insn = arc_bfd_get_16 (abfd, |
967 | contents + reloc_data.reloc_offset, | |
968 | reloc_data.input_section); | |
969 | break; | |
886a2506 | 970 | case 0: |
72f3b6aa | 971 | insn = arc_bfd_get_8 (abfd, |
886a2506 NC |
972 | contents + reloc_data.reloc_offset, |
973 | reloc_data.input_section); | |
974 | break; | |
975 | default: | |
976 | insn = 0; | |
977 | BFD_ASSERT (0); | |
978 | break; | |
979 | } | |
980 | ||
981 | orig_insn = insn; | |
982 | ||
983 | switch (reloc_data.howto->type) | |
984 | { | |
34e967a5 | 985 | #include "elf/arc-reloc.def" |
886a2506 NC |
986 | |
987 | default: | |
988 | BFD_ASSERT (0); | |
989 | break; | |
990 | } | |
991 | ||
992 | /* Check for relocation overflow. */ | |
993 | if (reloc_data.howto->complain_on_overflow != complain_overflow_dont) | |
4b0c052e | 994 | flag = bfd_check_overflow (reloc_data.howto->complain_on_overflow, |
08759e0f CM |
995 | reloc_data.howto->bitsize, |
996 | reloc_data.howto->rightshift, | |
997 | bfd_arch_bits_per_address (abfd), | |
998 | relocation); | |
4b0c052e AB |
999 | else |
1000 | flag = arc_special_overflow_checks (reloc_data, relocation, info); | |
886a2506 | 1001 | |
4b0c052e AB |
1002 | if (flag != bfd_reloc_ok) |
1003 | { | |
f7e8b360 | 1004 | ARC_DEBUG ("Relocation overflows !\n"); |
4b0c052e | 1005 | DEBUG_ARC_RELOC (reloc_data); |
f7e8b360 NC |
1006 | ARC_DEBUG ("Relocation value = signed -> %d, unsigned -> %u" |
1007 | ", hex -> (0x%08x)\n", | |
1008 | (int) relocation, (unsigned) relocation, (int) relocation); | |
886a2506 | 1009 | |
4b0c052e | 1010 | return flag; |
886a2506 | 1011 | } |
886a2506 | 1012 | |
4b0c052e | 1013 | /* Write updated instruction back to memory. */ |
886a2506 NC |
1014 | switch (reloc_data.howto->size) |
1015 | { | |
1016 | case 2: | |
72f3b6aa | 1017 | arc_bfd_put_32 (abfd, insn, |
886a2506 NC |
1018 | contents + reloc_data.reloc_offset, |
1019 | reloc_data.input_section); | |
1020 | break; | |
1021 | case 1: | |
72f3b6aa CZ |
1022 | arc_bfd_put_16 (abfd, insn, |
1023 | contents + reloc_data.reloc_offset, | |
1024 | reloc_data.input_section); | |
1025 | break; | |
886a2506 | 1026 | case 0: |
72f3b6aa | 1027 | arc_bfd_put_8 (abfd, insn, |
886a2506 NC |
1028 | contents + reloc_data.reloc_offset, |
1029 | reloc_data.input_section); | |
1030 | break; | |
1031 | default: | |
1032 | ARC_DEBUG ("size = %d\n", reloc_data.howto->size); | |
1033 | BFD_ASSERT (0); | |
1034 | break; | |
1035 | } | |
1036 | ||
1037 | return bfd_reloc_ok; | |
1038 | } | |
1039 | #undef S | |
1040 | #undef A | |
1041 | #undef B | |
1042 | #undef G | |
1043 | #undef GOT | |
1044 | #undef L | |
1045 | #undef MES | |
1046 | #undef P | |
1047 | #undef SECTSTAR | |
1048 | #undef SECTSTART | |
1049 | #undef _SDA_BASE_ | |
1050 | #undef none | |
1051 | ||
1052 | #undef ARC_RELOC_HOWTO | |
1053 | ||
886a2506 | 1054 | |
886a2506 NC |
1055 | /* Relocate an arc ELF section. |
1056 | Function : elf_arc_relocate_section | |
1057 | Brief : Relocate an arc section, by handling all the relocations | |
34e967a5 | 1058 | appearing in that section. |
886a2506 | 1059 | Args : output_bfd : The bfd being written to. |
34e967a5 MC |
1060 | info : Link information. |
1061 | input_bfd : The input bfd. | |
1062 | input_section : The section being relocated. | |
1063 | contents : contents of the section being relocated. | |
1064 | relocs : List of relocations in the section. | |
1065 | local_syms : is a pointer to the swapped in local symbols. | |
1066 | local_section : is an array giving the section in the input file | |
1067 | corresponding to the st_shndx field of each | |
1068 | local symbol. */ | |
886a2506 | 1069 | static bfd_boolean |
f7e8b360 | 1070 | elf_arc_relocate_section (bfd * output_bfd, |
886a2506 | 1071 | struct bfd_link_info * info, |
f7e8b360 NC |
1072 | bfd * input_bfd, |
1073 | asection * input_section, | |
1074 | bfd_byte * contents, | |
886a2506 NC |
1075 | Elf_Internal_Rela * relocs, |
1076 | Elf_Internal_Sym * local_syms, | |
f7e8b360 | 1077 | asection ** local_sections) |
886a2506 | 1078 | { |
f7e8b360 NC |
1079 | Elf_Internal_Shdr * symtab_hdr; |
1080 | struct elf_link_hash_entry ** sym_hashes; | |
1081 | Elf_Internal_Rela * rel; | |
1082 | Elf_Internal_Rela * wrel; | |
1083 | Elf_Internal_Rela * relend; | |
1084 | struct elf_link_hash_table * htab = elf_hash_table (info); | |
886a2506 NC |
1085 | |
1086 | symtab_hdr = &((elf_tdata (input_bfd))->symtab_hdr); | |
1087 | sym_hashes = elf_sym_hashes (input_bfd); | |
1088 | ||
3c8adaca | 1089 | rel = wrel = relocs; |
886a2506 | 1090 | relend = relocs + input_section->reloc_count; |
3c8adaca | 1091 | for (; rel < relend; wrel++, rel++) |
886a2506 NC |
1092 | { |
1093 | enum elf_arc_reloc_type r_type; | |
34e967a5 | 1094 | reloc_howto_type * howto; |
f7e8b360 | 1095 | unsigned long r_symndx; |
886a2506 | 1096 | struct elf_link_hash_entry * h; |
34e967a5 MC |
1097 | Elf_Internal_Sym * sym; |
1098 | asection * sec; | |
f7e8b360 NC |
1099 | struct elf_link_hash_entry * h2; |
1100 | const char * msg; | |
886a2506 NC |
1101 | |
1102 | struct arc_relocation_data reloc_data = | |
1103 | { | |
34e967a5 MC |
1104 | .reloc_offset = 0, |
1105 | .reloc_addend = 0, | |
1106 | .got_offset_value = 0, | |
1107 | .sym_value = 0, | |
1108 | .sym_section = NULL, | |
1109 | .howto = NULL, | |
1110 | .input_section = NULL, | |
1111 | .sdata_begin_symbol_vma = 0, | |
1112 | .sdata_begin_symbol_vma_set = FALSE, | |
1113 | .got_symbol_vma = 0, | |
1114 | .should_relocate = FALSE | |
886a2506 NC |
1115 | }; |
1116 | ||
34e967a5 MC |
1117 | r_type = ELF32_R_TYPE (rel->r_info); |
1118 | ||
1119 | if (r_type >= (int) R_ARC_max) | |
1120 | { | |
1121 | bfd_set_error (bfd_error_bad_value); | |
1122 | return FALSE; | |
1123 | } | |
3c8adaca | 1124 | howto = arc_elf_howto (r_type); |
34e967a5 MC |
1125 | |
1126 | r_symndx = ELF32_R_SYM (rel->r_info); | |
1127 | ||
1128 | /* If we are generating another .o file and the symbol in not | |
1129 | local, skip this relocation. */ | |
1130 | if (bfd_link_relocatable (info)) | |
1131 | { | |
1132 | /* This is a relocateable link. We don't have to change | |
1133 | anything, unless the reloc is against a section symbol, | |
1134 | in which case we have to adjust according to where the | |
1135 | section symbol winds up in the output section. */ | |
1136 | ||
1137 | /* Checks if this is a local symbol and thus the reloc | |
1138 | might (will??) be against a section symbol. */ | |
1139 | if (r_symndx < symtab_hdr->sh_info) | |
1140 | { | |
1141 | sym = local_syms + r_symndx; | |
1142 | if (ELF_ST_TYPE (sym->st_info) == STT_SECTION) | |
1143 | { | |
1144 | sec = local_sections[r_symndx]; | |
1145 | ||
f7e8b360 | 1146 | /* For RELA relocs. Just adjust the addend |
34e967a5 MC |
1147 | value in the relocation entry. */ |
1148 | rel->r_addend += sec->output_offset + sym->st_value; | |
1149 | ||
f7e8b360 NC |
1150 | ARC_DEBUG ("local symbols reloc (section=%d %s) seen in %s\n", |
1151 | (int) r_symndx, local_sections[r_symndx]->name, | |
1152 | __PRETTY_FUNCTION__); | |
34e967a5 MC |
1153 | } |
1154 | } | |
34e967a5 | 1155 | } |
886a2506 NC |
1156 | |
1157 | h2 = elf_link_hash_lookup (elf_hash_table (info), "__SDATA_BEGIN__", | |
1158 | FALSE, FALSE, TRUE); | |
1159 | ||
1160 | if (reloc_data.sdata_begin_symbol_vma_set == FALSE | |
34e967a5 MC |
1161 | && h2 != NULL && h2->root.type != bfd_link_hash_undefined |
1162 | && h2->root.u.def.section->output_section != NULL) | |
1163 | /* TODO: Verify this condition. */ | |
886a2506 NC |
1164 | { |
1165 | reloc_data.sdata_begin_symbol_vma = | |
08759e0f CM |
1166 | (h2->root.u.def.value |
1167 | + h2->root.u.def.section->output_section->vma); | |
886a2506 NC |
1168 | reloc_data.sdata_begin_symbol_vma_set = TRUE; |
1169 | } | |
1170 | ||
886a2506 NC |
1171 | reloc_data.input_section = input_section; |
1172 | reloc_data.howto = howto; | |
1173 | reloc_data.reloc_offset = rel->r_offset; | |
1174 | reloc_data.reloc_addend = rel->r_addend; | |
1175 | ||
886a2506 NC |
1176 | /* This is a final link. */ |
1177 | h = NULL; | |
1178 | sym = NULL; | |
1179 | sec = NULL; | |
1180 | ||
1181 | if (r_symndx < symtab_hdr->sh_info) /* A local symbol. */ | |
1182 | { | |
1183 | sym = local_syms + r_symndx; | |
1184 | sec = local_sections[r_symndx]; | |
3c8adaca CZ |
1185 | } |
1186 | else | |
1187 | { | |
1188 | /* TODO: This code is repeated from below. We should | |
1189 | clean it and remove duplications. | |
1190 | Sec is used check for discarded sections. | |
1191 | Need to redesign code below. */ | |
1192 | ||
1193 | /* Get the symbol's entry in the symtab. */ | |
1194 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
1195 | ||
1196 | while (h->root.type == bfd_link_hash_indirect | |
1197 | || h->root.type == bfd_link_hash_warning) | |
1198 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
1199 | ||
1200 | /* If we have encountered a definition for this symbol. */ | |
1201 | if (h->root.type == bfd_link_hash_defined | |
1202 | || h->root.type == bfd_link_hash_defweak) | |
1203 | { | |
1204 | reloc_data.sym_value = h->root.u.def.value; | |
1205 | sec = h->root.u.def.section; | |
1206 | } | |
1207 | } | |
1208 | ||
1209 | /* Clean relocs for symbols in discarded sections. */ | |
1210 | if (sec != NULL && discarded_section (sec)) | |
1211 | { | |
1212 | _bfd_clear_contents (howto, input_bfd, input_section, | |
1213 | contents + rel->r_offset); | |
1214 | rel->r_offset = rel->r_offset; | |
1215 | rel->r_info = 0; | |
1216 | rel->r_addend = 0; | |
1217 | ||
1218 | /* For ld -r, remove relocations in debug sections against | |
1219 | sections defined in discarded sections. Not done for | |
1220 | eh_frame editing code expects to be present. */ | |
1221 | if (bfd_link_relocatable (info) | |
1222 | && (input_section->flags & SEC_DEBUGGING)) | |
1223 | wrel--; | |
1224 | ||
1225 | continue; | |
1226 | } | |
1227 | ||
1228 | if (bfd_link_relocatable (info)) | |
1229 | { | |
1230 | if (wrel != rel) | |
1231 | *wrel = *rel; | |
1232 | continue; | |
1233 | } | |
1234 | ||
1235 | if (r_symndx < symtab_hdr->sh_info) /* A local symbol. */ | |
1236 | { | |
886a2506 NC |
1237 | reloc_data.sym_value = sym->st_value; |
1238 | reloc_data.sym_section = sec; | |
4b0c052e | 1239 | reloc_data.symbol_name = |
3c8adaca CZ |
1240 | bfd_elf_string_from_elf_section (input_bfd, |
1241 | symtab_hdr->sh_link, | |
1242 | sym->st_name); | |
886a2506 | 1243 | |
841fdfcd CZ |
1244 | /* Mergeable section handling. */ |
1245 | if ((sec->flags & SEC_MERGE) | |
1246 | && ELF_ST_TYPE (sym->st_info) == STT_SECTION) | |
1247 | { | |
1248 | asection *msec; | |
1249 | msec = sec; | |
1250 | rel->r_addend = _bfd_elf_rel_local_sym (output_bfd, sym, | |
1251 | &msec, rel->r_addend); | |
1252 | rel->r_addend -= (sec->output_section->vma | |
1253 | + sec->output_offset | |
1254 | + sym->st_value); | |
1255 | rel->r_addend += msec->output_section->vma + msec->output_offset; | |
1256 | ||
1257 | reloc_data.reloc_addend = rel->r_addend; | |
1258 | } | |
1259 | ||
34e967a5 MC |
1260 | BFD_ASSERT (htab->sgot != NULL || !is_reloc_for_GOT (howto)); |
1261 | if (htab->sgot != NULL) | |
1262 | reloc_data.got_symbol_vma = htab->sgot->output_section->vma | |
1263 | + htab->sgot->output_offset; | |
886a2506 NC |
1264 | |
1265 | reloc_data.should_relocate = TRUE; | |
1266 | } | |
1267 | else /* Global symbol. */ | |
1268 | { | |
f7e8b360 NC |
1269 | /* FIXME: We should use the RELOC_FOR_GLOBAL_SYMBOL macro |
1270 | (defined in elf-bfd.h) here. */ | |
1271 | ||
886a2506 NC |
1272 | /* Get the symbol's entry in the symtab. */ |
1273 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
1274 | ||
1275 | while (h->root.type == bfd_link_hash_indirect | |
1276 | || h->root.type == bfd_link_hash_warning) | |
1277 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
1278 | ||
3c8adaca CZ |
1279 | /* TODO: Need to validate what was the intention. */ |
1280 | /* BFD_ASSERT ((h->dynindx == -1) || (h->forced_local != 0)); */ | |
4b0c052e | 1281 | reloc_data.symbol_name = h->root.root.string; |
3c8adaca | 1282 | |
886a2506 NC |
1283 | /* If we have encountered a definition for this symbol. */ |
1284 | if (h->root.type == bfd_link_hash_defined | |
1285 | || h->root.type == bfd_link_hash_defweak) | |
1286 | { | |
1287 | reloc_data.sym_value = h->root.u.def.value; | |
1288 | reloc_data.sym_section = h->root.u.def.section; | |
1289 | ||
1290 | reloc_data.should_relocate = TRUE; | |
1291 | ||
34e967a5 | 1292 | if (is_reloc_for_GOT (howto) && !bfd_link_pic (info)) |
886a2506 | 1293 | { |
34e967a5 MC |
1294 | /* TODO: Change it to use arc_do_relocation with |
1295 | ARC_32 reloc. Try to use ADD_RELA macro. */ | |
886a2506 NC |
1296 | bfd_vma relocation = |
1297 | reloc_data.sym_value + reloc_data.reloc_addend | |
34e967a5 MC |
1298 | + (reloc_data.sym_section->output_section != NULL ? |
1299 | (reloc_data.sym_section->output_offset | |
1300 | + reloc_data.sym_section->output_section->vma) | |
1301 | : 0); | |
1302 | ||
1303 | BFD_ASSERT (h->got.glist); | |
1304 | bfd_vma got_offset = h->got.glist->offset; | |
1305 | bfd_put_32 (output_bfd, relocation, | |
1306 | htab->sgot->contents + got_offset); | |
1307 | } | |
1308 | if (is_reloc_for_PLT (howto) && h->plt.offset != (bfd_vma) -1) | |
1309 | { | |
1310 | /* TODO: This is repeated up here. */ | |
1311 | reloc_data.sym_value = h->plt.offset; | |
1312 | reloc_data.sym_section = htab->splt; | |
886a2506 NC |
1313 | } |
1314 | } | |
1315 | else if (h->root.type == bfd_link_hash_undefweak) | |
1316 | { | |
1317 | /* Is weak symbol and has no definition. */ | |
34e967a5 MC |
1318 | if (is_reloc_for_GOT (howto)) |
1319 | { | |
1320 | reloc_data.sym_value = h->root.u.def.value; | |
1321 | reloc_data.sym_section = htab->sgot; | |
1322 | reloc_data.should_relocate = TRUE; | |
1323 | } | |
1324 | else if (is_reloc_for_PLT (howto) | |
1325 | && h->plt.offset != (bfd_vma) -1) | |
1326 | { | |
1327 | /* TODO: This is repeated up here. */ | |
1328 | reloc_data.sym_value = h->plt.offset; | |
1329 | reloc_data.sym_section = htab->splt; | |
1330 | reloc_data.should_relocate = TRUE; | |
1331 | } | |
1332 | else | |
1333 | continue; | |
886a2506 NC |
1334 | } |
1335 | else | |
1336 | { | |
1337 | if (is_reloc_for_GOT (howto)) | |
1338 | { | |
886a2506 | 1339 | reloc_data.sym_value = h->root.u.def.value; |
34e967a5 | 1340 | reloc_data.sym_section = htab->sgot; |
886a2506 NC |
1341 | |
1342 | reloc_data.should_relocate = TRUE; | |
1343 | } | |
1344 | else if (is_reloc_for_PLT (howto)) | |
1345 | { | |
7e458899 CZ |
1346 | /* Fail if it is linking for PIE and the symbol is |
1347 | undefined. */ | |
1a72702b AM |
1348 | if (bfd_link_executable (info)) |
1349 | (*info->callbacks->undefined_symbol) | |
1350 | (info, h->root.root.string, input_bfd, input_section, | |
1351 | rel->r_offset, TRUE); | |
886a2506 | 1352 | reloc_data.sym_value = h->plt.offset; |
34e967a5 | 1353 | reloc_data.sym_section = htab->splt; |
886a2506 NC |
1354 | |
1355 | reloc_data.should_relocate = TRUE; | |
1356 | } | |
8a36df4d | 1357 | else if (!bfd_link_pic (info) || bfd_link_executable (info)) |
1a72702b AM |
1358 | (*info->callbacks->undefined_symbol) |
1359 | (info, h->root.root.string, input_bfd, input_section, | |
1360 | rel->r_offset, TRUE); | |
886a2506 NC |
1361 | } |
1362 | ||
34e967a5 MC |
1363 | BFD_ASSERT (htab->sgot != NULL || !is_reloc_for_GOT (howto)); |
1364 | if (htab->sgot != NULL) | |
1365 | reloc_data.got_symbol_vma = htab->sgot->output_section->vma | |
1366 | + htab->sgot->output_offset; | |
886a2506 NC |
1367 | } |
1368 | ||
08759e0f CM |
1369 | if ((is_reloc_for_GOT (howto) |
1370 | || is_reloc_for_TLS (howto))) | |
1371 | { | |
980aa3e6 CM |
1372 | reloc_data.should_relocate = TRUE; |
1373 | ||
08759e0f CM |
1374 | struct got_entry **list |
1375 | = get_got_entry_list_for_symbol (output_bfd, r_symndx, h); | |
1376 | ||
1377 | reloc_data.got_offset_value | |
1378 | = relocate_fix_got_relocs_for_got_info (list, | |
1379 | tls_type_for_reloc (howto), | |
1380 | info, | |
1381 | output_bfd, | |
1382 | r_symndx, | |
1383 | local_syms, | |
1384 | local_sections, | |
1385 | h, | |
1386 | &reloc_data); | |
1387 | ||
1388 | if (h == NULL) | |
1389 | { | |
1390 | create_got_dynrelocs_for_single_entry ( | |
1391 | got_entry_for_type (list, | |
1392 | arc_got_entry_type_for_reloc (howto)), | |
1393 | output_bfd, info, NULL); | |
1394 | } | |
1395 | } | |
f7e8b360 | 1396 | |
34e967a5 MC |
1397 | switch (r_type) |
1398 | { | |
1399 | case R_ARC_32: | |
1400 | case R_ARC_32_ME: | |
1401 | case R_ARC_PC32: | |
1402 | case R_ARC_32_PCREL: | |
8a36df4d | 1403 | if ((bfd_link_pic (info)) |
34e967a5 MC |
1404 | && ((r_type != R_ARC_PC32 && r_type != R_ARC_32_PCREL) |
1405 | || (h != NULL | |
1406 | && h->dynindx != -1 | |
1407 | && (!info->symbolic || !h->def_regular)))) | |
1408 | { | |
1409 | Elf_Internal_Rela outrel; | |
1410 | bfd_byte *loc; | |
1411 | bfd_boolean skip = FALSE; | |
1412 | bfd_boolean relocate = FALSE; | |
1413 | asection *sreloc = _bfd_elf_get_dynamic_reloc_section | |
1414 | (input_bfd, input_section, | |
1415 | /*RELA*/ TRUE); | |
1416 | ||
1417 | BFD_ASSERT (sreloc != NULL); | |
1418 | ||
1419 | outrel.r_offset = _bfd_elf_section_offset (output_bfd, | |
1420 | info, | |
1421 | input_section, | |
1422 | rel->r_offset); | |
1423 | if (outrel.r_offset == (bfd_vma) -1) | |
1424 | skip = TRUE; | |
1425 | ||
1426 | outrel.r_addend = rel->r_addend; | |
1427 | outrel.r_offset += (input_section->output_section->vma | |
1428 | + input_section->output_offset); | |
1429 | ||
3c8adaca | 1430 | #define IS_ARC_PCREL_TYPE(TYPE) \ |
f7e8b360 | 1431 | ( (TYPE == R_ARC_PC32) \ |
3c8adaca | 1432 | || (TYPE == R_ARC_32_PCREL)) |
f7e8b360 | 1433 | |
34e967a5 MC |
1434 | if (skip) |
1435 | { | |
1436 | memset (&outrel, 0, sizeof outrel); | |
1437 | relocate = FALSE; | |
1438 | } | |
3c8adaca CZ |
1439 | else if (h != NULL |
1440 | && h->dynindx != -1 | |
1441 | && ((IS_ARC_PCREL_TYPE (r_type)) | |
1442 | || !(bfd_link_executable (info) | |
1443 | || SYMBOLIC_BIND (info, h)) | |
1444 | || ! h->def_regular)) | |
34e967a5 | 1445 | { |
94e5c971 | 1446 | BFD_ASSERT (h != NULL); |
34e967a5 MC |
1447 | if ((input_section->flags & SEC_ALLOC) != 0) |
1448 | relocate = FALSE; | |
1449 | else | |
1450 | relocate = TRUE; | |
94e5c971 CZ |
1451 | |
1452 | BFD_ASSERT (h->dynindx != -1); | |
34e967a5 MC |
1453 | outrel.r_info = ELF32_R_INFO (h->dynindx, r_type); |
1454 | } | |
1455 | else | |
1456 | { | |
1457 | /* Handle local symbols, they either do not have a | |
1458 | global hash table entry (h == NULL), or are | |
1459 | forced local due to a version script | |
1460 | (h->forced_local), or the third condition is | |
1461 | legacy, it appears to say something like, for | |
1462 | links where we are pre-binding the symbols, or | |
1463 | there's not an entry for this symbol in the | |
1464 | dynamic symbol table, and it's a regular symbol | |
1465 | not defined in a shared object, then treat the | |
1466 | symbol as local, resolve it now. */ | |
3c8adaca CZ |
1467 | relocate = TRUE; |
1468 | /* outrel.r_addend = 0; */ | |
1469 | outrel.r_info = ELF32_R_INFO (0, R_ARC_RELATIVE); | |
34e967a5 MC |
1470 | } |
1471 | ||
1472 | BFD_ASSERT (sreloc->contents != 0); | |
1473 | ||
1474 | loc = sreloc->contents; | |
1475 | loc += sreloc->reloc_count * sizeof (Elf32_External_Rela); | |
1476 | sreloc->reloc_count += 1; | |
1477 | ||
1478 | bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); | |
1479 | ||
1480 | if (relocate == FALSE) | |
1481 | continue; | |
1482 | } | |
1483 | break; | |
1484 | default: | |
1485 | break; | |
1486 | } | |
1487 | ||
1488 | if (is_reloc_SDA_relative (howto) | |
1489 | && (reloc_data.sdata_begin_symbol_vma_set == FALSE)) | |
886a2506 | 1490 | { |
4eca0228 AM |
1491 | _bfd_error_handler |
1492 | ("Error: Linker symbol __SDATA_BEGIN__ not found"); | |
886a2506 NC |
1493 | bfd_set_error (bfd_error_bad_value); |
1494 | return FALSE; | |
1495 | } | |
1496 | ||
1497 | DEBUG_ARC_RELOC (reloc_data); | |
34e967a5 | 1498 | |
2ab2f40d | 1499 | /* Make sure we have with a dynamic linker. In case of GOT and PLT |
08759e0f | 1500 | the sym_section should point to .got or .plt respectively. */ |
815dc1bc CZ |
1501 | if ((is_reloc_for_GOT (howto) || is_reloc_for_PLT (howto)) |
1502 | && reloc_data.sym_section == NULL) | |
2ab2f40d | 1503 | { |
4eca0228 | 1504 | _bfd_error_handler |
2ab2f40d CM |
1505 | (_("GOT and PLT relocations cannot be fixed with a non dynamic linker.")); |
1506 | bfd_set_error (bfd_error_bad_value); | |
1507 | return FALSE; | |
1508 | } | |
1509 | ||
f7e8b360 NC |
1510 | msg = NULL; |
1511 | switch (arc_do_relocation (contents, reloc_data, info)) | |
1512 | { | |
1513 | case bfd_reloc_ok: | |
1514 | continue; /* The reloc processing loop. */ | |
1515 | ||
1516 | case bfd_reloc_overflow: | |
1517 | (*info->callbacks->reloc_overflow) | |
1518 | (info, (h ? &h->root : NULL), reloc_data.symbol_name, howto->name, (bfd_vma) 0, | |
1519 | input_bfd, input_section, rel->r_offset); | |
1520 | break; | |
1521 | ||
1522 | case bfd_reloc_undefined: | |
1523 | (*info->callbacks->undefined_symbol) | |
1524 | (info, reloc_data.symbol_name, input_bfd, input_section, rel->r_offset, TRUE); | |
1525 | break; | |
1526 | ||
1527 | case bfd_reloc_other: | |
695344c0 | 1528 | /* xgettext:c-format */ |
f7e8b360 NC |
1529 | msg = _("%B(%A): warning: unaligned access to symbol '%s' in the small data area"); |
1530 | break; | |
1531 | ||
1532 | case bfd_reloc_outofrange: | |
695344c0 | 1533 | /* xgettext:c-format */ |
f7e8b360 NC |
1534 | msg = _("%B(%A): internal error: out of range error"); |
1535 | break; | |
1536 | ||
1537 | case bfd_reloc_notsupported: | |
695344c0 | 1538 | /* xgettext:c-format */ |
f7e8b360 NC |
1539 | msg = _("%B(%A): internal error: unsupported relocation error"); |
1540 | break; | |
1541 | ||
1542 | case bfd_reloc_dangerous: | |
695344c0 | 1543 | /* xgettext:c-format */ |
f7e8b360 NC |
1544 | msg = _("%B(%A): internal error: dangerous relocation"); |
1545 | break; | |
1546 | ||
1547 | default: | |
695344c0 | 1548 | /* xgettext:c-format */ |
f7e8b360 NC |
1549 | msg = _("%B(%A): internal error: unknown error"); |
1550 | break; | |
1551 | } | |
1552 | ||
1553 | if (msg) | |
1554 | _bfd_error_handler (msg, input_bfd, input_section, reloc_data.symbol_name); | |
1555 | return FALSE; | |
886a2506 NC |
1556 | } |
1557 | ||
1558 | return TRUE; | |
1559 | } | |
1560 | ||
8a36df4d CM |
1561 | #define elf_arc_hash_table(p) \ |
1562 | (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \ | |
1563 | == ARC_ELF_DATA ? ((struct elf_arc_link_hash_table *) ((p)->hash)) : NULL) | |
1564 | ||
886a2506 NC |
1565 | static struct dynamic_sections |
1566 | arc_create_dynamic_sections (bfd * abfd, struct bfd_link_info *info) | |
1567 | { | |
34e967a5 MC |
1568 | struct elf_link_hash_table *htab; |
1569 | bfd *dynobj; | |
886a2506 | 1570 | struct dynamic_sections ds = |
886a2506 | 1571 | { |
34e967a5 MC |
1572 | .initialized = FALSE, |
1573 | .sgot = NULL, | |
1574 | .srelgot = NULL, | |
1575 | .sgotplt = NULL, | |
1576 | .srelgotplt = NULL, | |
1577 | .sdyn = NULL, | |
1578 | .splt = NULL, | |
1579 | .srelplt = NULL | |
1580 | }; | |
1581 | ||
1582 | htab = elf_hash_table (info); | |
1583 | BFD_ASSERT (htab); | |
1584 | ||
1585 | /* Create dynamic sections for relocatable executables so that we | |
1586 | can copy relocations. */ | |
1587 | if (! htab->dynamic_sections_created && bfd_link_pic (info)) | |
1588 | { | |
1589 | if (! _bfd_elf_link_create_dynamic_sections (abfd, info)) | |
1590 | BFD_ASSERT (0); | |
886a2506 | 1591 | } |
886a2506 | 1592 | |
34e967a5 | 1593 | dynobj = (elf_hash_table (info))->dynobj; |
886a2506 | 1594 | |
34e967a5 | 1595 | if (dynobj) |
886a2506 | 1596 | { |
34e967a5 MC |
1597 | ds.sgot = htab->sgot; |
1598 | ds.srelgot = htab->srelgot; | |
886a2506 | 1599 | |
34e967a5 MC |
1600 | ds.sgotplt = bfd_get_section_by_name (dynobj, ".got.plt"); |
1601 | ds.srelgotplt = ds.srelplt; | |
886a2506 | 1602 | |
34e967a5 MC |
1603 | ds.splt = bfd_get_section_by_name (dynobj, ".plt"); |
1604 | ds.srelplt = bfd_get_section_by_name (dynobj, ".rela.plt"); | |
1605 | } | |
1606 | ||
1607 | if (htab->dynamic_sections_created) | |
1608 | { | |
1609 | ds.sdyn = bfd_get_section_by_name (dynobj, ".dynamic"); | |
1610 | } | |
886a2506 NC |
1611 | |
1612 | ds.initialized = TRUE; | |
1613 | ||
1614 | return ds; | |
1615 | } | |
1616 | ||
886a2506 | 1617 | static bfd_boolean |
08759e0f | 1618 | elf_arc_check_relocs (bfd * abfd, |
886a2506 | 1619 | struct bfd_link_info * info, |
34e967a5 | 1620 | asection * sec, |
886a2506 NC |
1621 | const Elf_Internal_Rela * relocs) |
1622 | { | |
34e967a5 MC |
1623 | Elf_Internal_Shdr * symtab_hdr; |
1624 | struct elf_link_hash_entry ** sym_hashes; | |
34e967a5 MC |
1625 | const Elf_Internal_Rela * rel; |
1626 | const Elf_Internal_Rela * rel_end; | |
1627 | bfd * dynobj; | |
1628 | asection * sreloc = NULL; | |
34e967a5 MC |
1629 | |
1630 | if (bfd_link_relocatable (info)) | |
1631 | return TRUE; | |
886a2506 NC |
1632 | |
1633 | dynobj = (elf_hash_table (info))->dynobj; | |
1634 | symtab_hdr = &((elf_tdata (abfd))->symtab_hdr); | |
1635 | sym_hashes = elf_sym_hashes (abfd); | |
886a2506 NC |
1636 | |
1637 | rel_end = relocs + sec->reloc_count; | |
1638 | for (rel = relocs; rel < rel_end; rel++) | |
1639 | { | |
1640 | enum elf_arc_reloc_type r_type; | |
1641 | reloc_howto_type *howto; | |
1642 | unsigned long r_symndx; | |
1643 | struct elf_link_hash_entry *h; | |
1644 | ||
1645 | r_type = ELF32_R_TYPE (rel->r_info); | |
1646 | ||
1647 | if (r_type >= (int) R_ARC_max) | |
1648 | { | |
1649 | bfd_set_error (bfd_error_bad_value); | |
1650 | return FALSE; | |
1651 | } | |
3c8adaca | 1652 | howto = arc_elf_howto (r_type); |
34e967a5 MC |
1653 | |
1654 | if (dynobj == NULL | |
1655 | && (is_reloc_for_GOT (howto) == TRUE | |
1656 | || is_reloc_for_TLS (howto) == TRUE)) | |
1657 | { | |
1658 | dynobj = elf_hash_table (info)->dynobj = abfd; | |
1659 | if (! _bfd_elf_create_got_section (abfd, info)) | |
1660 | return FALSE; | |
1661 | } | |
886a2506 NC |
1662 | |
1663 | /* Load symbol information. */ | |
1664 | r_symndx = ELF32_R_SYM (rel->r_info); | |
1665 | if (r_symndx < symtab_hdr->sh_info) /* Is a local symbol. */ | |
1666 | h = NULL; | |
1667 | else /* Global one. */ | |
1668 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
1669 | ||
34e967a5 MC |
1670 | switch (r_type) |
1671 | { | |
1672 | case R_ARC_32: | |
1673 | case R_ARC_32_ME: | |
1674 | /* During shared library creation, these relocs should not | |
1675 | appear in a shared library (as memory will be read only | |
1676 | and the dynamic linker can not resolve these. However | |
1677 | the error should not occur for e.g. debugging or | |
1678 | non-readonly sections. */ | |
2ab2f40d | 1679 | if ((bfd_link_dll (info) && !bfd_link_pie (info)) |
34e967a5 | 1680 | && (sec->flags & SEC_ALLOC) != 0 |
3c8adaca CZ |
1681 | && (sec->flags & SEC_READONLY) != 0 |
1682 | && ((sec->flags & SEC_CODE) != 0 | |
1683 | || (sec->flags & SEC_DEBUGGING) != 0)) | |
34e967a5 MC |
1684 | { |
1685 | const char *name; | |
1686 | if (h) | |
1687 | name = h->root.root.string; | |
1688 | else | |
1689 | /* bfd_elf_sym_name (abfd, symtab_hdr, isym, NULL); */ | |
1690 | name = "UNKNOWN"; | |
4eca0228 | 1691 | _bfd_error_handler |
695344c0 | 1692 | /* xgettext:c-format */ |
34e967a5 MC |
1693 | (_("\ |
1694 | %B: relocation %s against `%s' can not be used when making a shared object; recompile with -fPIC"), | |
1695 | abfd, | |
1696 | arc_elf_howto (r_type)->name, | |
1697 | name); | |
1698 | bfd_set_error (bfd_error_bad_value); | |
1699 | return FALSE; | |
1700 | } | |
1701 | ||
1702 | /* In some cases we are not setting the 'non_got_ref' | |
1703 | flag, even though the relocations don't require a GOT | |
1704 | access. We should extend the testing in this area to | |
1705 | ensure that no significant cases are being missed. */ | |
1706 | if (h) | |
1707 | h->non_got_ref = 1; | |
1708 | /* FALLTHROUGH */ | |
1709 | case R_ARC_PC32: | |
1710 | case R_ARC_32_PCREL: | |
8a36df4d | 1711 | if ((bfd_link_pic (info)) |
34e967a5 MC |
1712 | && ((r_type != R_ARC_PC32 && r_type != R_ARC_32_PCREL) |
1713 | || (h != NULL | |
34e967a5 MC |
1714 | && (!info->symbolic || !h->def_regular)))) |
1715 | { | |
1716 | if (sreloc == NULL) | |
1717 | { | |
1718 | sreloc = _bfd_elf_make_dynamic_reloc_section (sec, dynobj, | |
1719 | 2, abfd, | |
1720 | /*rela*/ | |
1721 | TRUE); | |
1722 | ||
1723 | if (sreloc == NULL) | |
1724 | return FALSE; | |
1725 | } | |
1726 | sreloc->size += sizeof (Elf32_External_Rela); | |
1727 | ||
1728 | } | |
1729 | default: | |
1730 | break; | |
1731 | } | |
1732 | ||
886a2506 NC |
1733 | if (is_reloc_for_PLT (howto) == TRUE) |
1734 | { | |
1735 | if (h == NULL) | |
1736 | continue; | |
1737 | else | |
1738 | h->needs_plt = 1; | |
1739 | } | |
1740 | ||
08759e0f CM |
1741 | /* Add info to the symbol got_entry_list. */ |
1742 | if (is_reloc_for_GOT (howto) == TRUE | |
1743 | || is_reloc_for_TLS (howto) == TRUE) | |
34e967a5 | 1744 | { |
08759e0f CM |
1745 | arc_fill_got_info_for_reloc ( |
1746 | arc_got_entry_type_for_reloc (howto), | |
1747 | get_got_entry_list_for_symbol (abfd, r_symndx, h), | |
1748 | info, | |
1749 | h); | |
34e967a5 MC |
1750 | } |
1751 | } | |
886a2506 | 1752 | |
34e967a5 MC |
1753 | return TRUE; |
1754 | } | |
886a2506 | 1755 | |
34e967a5 | 1756 | #define ELF_DYNAMIC_INTERPRETER "/sbin/ld-uClibc.so" |
886a2506 | 1757 | |
34e967a5 MC |
1758 | static struct plt_version_t * |
1759 | arc_get_plt_version (struct bfd_link_info *info) | |
886a2506 | 1760 | { |
34e967a5 | 1761 | int i; |
886a2506 | 1762 | |
34e967a5 MC |
1763 | for (i = 0; i < 1; i++) |
1764 | { | |
1765 | ARC_DEBUG ("%d: size1 = %d, size2 = %d\n", i, | |
f7e8b360 NC |
1766 | (int) plt_versions[i].entry_size, |
1767 | (int) plt_versions[i].elem_size); | |
34e967a5 | 1768 | } |
886a2506 | 1769 | |
34e967a5 | 1770 | if (bfd_get_mach (info->output_bfd) == bfd_mach_arc_arcv2) |
886a2506 | 1771 | { |
34e967a5 MC |
1772 | if (bfd_link_pic (info)) |
1773 | return &(plt_versions[ELF_ARCV2_PIC]); | |
1774 | else | |
1775 | return &(plt_versions[ELF_ARCV2_ABS]); | |
1776 | } | |
1777 | else | |
886a2506 | 1778 | { |
34e967a5 MC |
1779 | if (bfd_link_pic (info)) |
1780 | return &(plt_versions[ELF_ARC_PIC]); | |
1781 | else | |
1782 | return &(plt_versions[ELF_ARC_ABS]); | |
886a2506 | 1783 | } |
886a2506 NC |
1784 | } |
1785 | ||
1786 | static bfd_vma | |
1787 | add_symbol_to_plt (struct bfd_link_info *info) | |
1788 | { | |
34e967a5 | 1789 | struct elf_link_hash_table *htab = elf_hash_table (info); |
886a2506 NC |
1790 | bfd_vma ret; |
1791 | ||
34e967a5 | 1792 | struct plt_version_t *plt_data = arc_get_plt_version (info); |
886a2506 | 1793 | |
34e967a5 MC |
1794 | /* If this is the first .plt entry, make room for the special first |
1795 | entry. */ | |
1796 | if (htab->splt->size == 0) | |
1797 | htab->splt->size += plt_data->entry_size; | |
886a2506 | 1798 | |
34e967a5 MC |
1799 | ret = htab->splt->size; |
1800 | ||
1801 | htab->splt->size += plt_data->elem_size; | |
f7e8b360 | 1802 | ARC_DEBUG ("PLT_SIZE = %d\n", (int) htab->splt->size); |
34e967a5 MC |
1803 | |
1804 | htab->sgotplt->size += 4; | |
1805 | htab->srelplt->size += sizeof (Elf32_External_Rela); | |
886a2506 NC |
1806 | |
1807 | return ret; | |
1808 | } | |
1809 | ||
34e967a5 MC |
1810 | #define PLT_DO_RELOCS_FOR_ENTRY(ABFD, DS, RELOCS) \ |
1811 | plt_do_relocs_for_symbol (ABFD, DS, RELOCS, 0, 0) | |
886a2506 NC |
1812 | |
1813 | static void | |
34e967a5 MC |
1814 | plt_do_relocs_for_symbol (bfd *abfd, |
1815 | struct elf_link_hash_table *htab, | |
1816 | const struct plt_reloc *reloc, | |
886a2506 NC |
1817 | bfd_vma plt_offset, |
1818 | bfd_vma symbol_got_offset) | |
1819 | { | |
1820 | while (SYM_ONLY (reloc->symbol) != LAST_RELOC) | |
1821 | { | |
1822 | bfd_vma relocation = 0; | |
1823 | ||
1824 | switch (SYM_ONLY (reloc->symbol)) | |
1825 | { | |
1826 | case SGOT: | |
08759e0f CM |
1827 | relocation |
1828 | = htab->sgotplt->output_section->vma | |
1829 | + htab->sgotplt->output_offset + symbol_got_offset; | |
886a2506 NC |
1830 | break; |
1831 | } | |
1832 | relocation += reloc->addend; | |
1833 | ||
34e967a5 MC |
1834 | if (IS_RELATIVE (reloc->symbol)) |
1835 | { | |
1836 | bfd_vma reloc_offset = reloc->offset; | |
1837 | reloc_offset -= (IS_INSN_32 (reloc->symbol)) ? 4 : 0; | |
1838 | reloc_offset -= (IS_INSN_24 (reloc->symbol)) ? 2 : 0; | |
886a2506 | 1839 | |
34e967a5 MC |
1840 | relocation -= htab->splt->output_section->vma |
1841 | + htab->splt->output_offset | |
1842 | + plt_offset + reloc_offset; | |
1843 | } | |
1844 | ||
1845 | /* TODO: being ME is not a property of the relocation but of the | |
1846 | section of which is applying the relocation. */ | |
1e5885b7 | 1847 | if (IS_MIDDLE_ENDIAN (reloc->symbol) && !bfd_big_endian (abfd)) |
886a2506 | 1848 | { |
08759e0f CM |
1849 | relocation |
1850 | = ((relocation & 0xffff0000) >> 16) | |
1851 | | ((relocation & 0xffff) << 16); | |
886a2506 NC |
1852 | } |
1853 | ||
1854 | switch (reloc->size) | |
1855 | { | |
1856 | case 32: | |
34e967a5 | 1857 | bfd_put_32 (htab->splt->output_section->owner, |
886a2506 | 1858 | relocation, |
34e967a5 | 1859 | htab->splt->contents + plt_offset + reloc->offset); |
886a2506 NC |
1860 | break; |
1861 | } | |
1862 | ||
34e967a5 | 1863 | reloc = &(reloc[1]); /* Jump to next relocation. */ |
886a2506 NC |
1864 | } |
1865 | } | |
1866 | ||
1867 | static void | |
34e967a5 MC |
1868 | relocate_plt_for_symbol (bfd *output_bfd, |
1869 | struct bfd_link_info *info, | |
886a2506 NC |
1870 | struct elf_link_hash_entry *h) |
1871 | { | |
34e967a5 MC |
1872 | struct plt_version_t *plt_data = arc_get_plt_version (info); |
1873 | struct elf_link_hash_table *htab = elf_hash_table (info); | |
886a2506 | 1874 | |
34e967a5 MC |
1875 | bfd_vma plt_index = (h->plt.offset - plt_data->entry_size) |
1876 | / plt_data->elem_size; | |
886a2506 NC |
1877 | bfd_vma got_offset = (plt_index + 3) * 4; |
1878 | ||
f7e8b360 NC |
1879 | ARC_DEBUG ("arc_info: PLT_OFFSET = %#lx, PLT_ENTRY_VMA = %#lx, \ |
1880 | GOT_ENTRY_OFFSET = %#lx, GOT_ENTRY_VMA = %#lx, for symbol %s\n", | |
1881 | (long) h->plt.offset, | |
1882 | (long) (htab->splt->output_section->vma | |
1883 | + htab->splt->output_offset | |
1884 | + h->plt.offset), | |
1885 | (long) got_offset, | |
1886 | (long) (htab->sgotplt->output_section->vma | |
1887 | + htab->sgotplt->output_offset | |
1888 | + got_offset), | |
34e967a5 MC |
1889 | h->root.root.string); |
1890 | ||
1e5885b7 CZ |
1891 | { |
1892 | bfd_vma i = 0; | |
1893 | uint16_t *ptr = (uint16_t *) plt_data->elem; | |
f7e8b360 | 1894 | |
1e5885b7 CZ |
1895 | for (i = 0; i < plt_data->elem_size/2; i++) |
1896 | { | |
1897 | uint16_t data = ptr[i]; | |
1898 | bfd_put_16 (output_bfd, | |
1899 | (bfd_vma) data, | |
1900 | htab->splt->contents + h->plt.offset + (i*2)); | |
1901 | } | |
1902 | } | |
1903 | ||
34e967a5 MC |
1904 | plt_do_relocs_for_symbol (output_bfd, htab, |
1905 | plt_data->elem_relocs, | |
1906 | h->plt.offset, | |
886a2506 | 1907 | got_offset); |
34e967a5 MC |
1908 | |
1909 | /* Fill in the entry in the global offset table. */ | |
1910 | bfd_put_32 (output_bfd, | |
1911 | (bfd_vma) (htab->splt->output_section->vma | |
1912 | + htab->splt->output_offset), | |
1913 | htab->sgotplt->contents + got_offset); | |
1914 | ||
1915 | /* TODO: Fill in the entry in the .rela.plt section. */ | |
1916 | { | |
1917 | Elf_Internal_Rela rel; | |
1918 | bfd_byte *loc; | |
1919 | ||
1920 | rel.r_offset = (htab->sgotplt->output_section->vma | |
1921 | + htab->sgotplt->output_offset | |
1922 | + got_offset); | |
1923 | rel.r_addend = 0; | |
94e5c971 CZ |
1924 | |
1925 | BFD_ASSERT (h->dynindx != -1); | |
34e967a5 MC |
1926 | rel.r_info = ELF32_R_INFO (h->dynindx, R_ARC_JMP_SLOT); |
1927 | ||
1928 | loc = htab->srelplt->contents; | |
1929 | loc += plt_index * sizeof (Elf32_External_Rela); /* relA */ | |
1930 | bfd_elf32_swap_reloca_out (output_bfd, &rel, loc); | |
1931 | } | |
886a2506 NC |
1932 | } |
1933 | ||
1934 | static void | |
34e967a5 MC |
1935 | relocate_plt_for_entry (bfd *abfd, |
1936 | struct bfd_link_info *info) | |
886a2506 | 1937 | { |
34e967a5 MC |
1938 | struct plt_version_t *plt_data = arc_get_plt_version (info); |
1939 | struct elf_link_hash_table *htab = elf_hash_table (info); | |
886a2506 | 1940 | |
1e5885b7 CZ |
1941 | { |
1942 | bfd_vma i = 0; | |
1943 | uint16_t *ptr = (uint16_t *) plt_data->entry; | |
1944 | for (i = 0; i < plt_data->entry_size/2; i++) | |
1945 | { | |
1946 | uint16_t data = ptr[i]; | |
1947 | bfd_put_16 (abfd, | |
1948 | (bfd_vma) data, | |
1949 | htab->splt->contents + (i*2)); | |
1950 | } | |
1951 | } | |
34e967a5 | 1952 | PLT_DO_RELOCS_FOR_ENTRY (abfd, htab, plt_data->entry_relocs); |
886a2506 NC |
1953 | } |
1954 | ||
34e967a5 MC |
1955 | /* Desc : Adjust a symbol defined by a dynamic object and referenced |
1956 | by a regular object. The current definition is in some section of | |
1957 | the dynamic object, but we're not including those sections. We | |
1958 | have to change the definition to something the rest of the link can | |
886a2506 NC |
1959 | understand. */ |
1960 | ||
1961 | static bfd_boolean | |
1962 | elf_arc_adjust_dynamic_symbol (struct bfd_link_info *info, | |
1963 | struct elf_link_hash_entry *h) | |
1964 | { | |
34e967a5 | 1965 | asection *s; |
886a2506 | 1966 | bfd *dynobj = (elf_hash_table (info))->dynobj; |
34e967a5 | 1967 | struct elf_link_hash_table *htab = elf_hash_table (info); |
886a2506 | 1968 | |
34e967a5 MC |
1969 | if (h->type == STT_FUNC |
1970 | || h->type == STT_GNU_IFUNC | |
1971 | || h->needs_plt == 1) | |
886a2506 NC |
1972 | { |
1973 | if (!bfd_link_pic (info) && !h->def_dynamic && !h->ref_dynamic) | |
1974 | { | |
1975 | /* This case can occur if we saw a PLT32 reloc in an input | |
1976 | file, but the symbol was never referred to by a dynamic | |
1977 | object. In such a case, we don't actually need to build | |
1978 | a procedure linkage table, and we can just do a PC32 | |
1979 | reloc instead. */ | |
1980 | BFD_ASSERT (h->needs_plt); | |
1981 | return TRUE; | |
1982 | } | |
1983 | ||
1984 | /* Make sure this symbol is output as a dynamic symbol. */ | |
1985 | if (h->dynindx == -1 && !h->forced_local | |
1986 | && !bfd_elf_link_record_dynamic_symbol (info, h)) | |
1987 | return FALSE; | |
1988 | ||
34e967a5 MC |
1989 | if (bfd_link_pic (info) |
1990 | || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h)) | |
886a2506 NC |
1991 | { |
1992 | bfd_vma loc = add_symbol_to_plt (info); | |
1993 | ||
08759e0f | 1994 | if (bfd_link_executable (info) && !h->def_regular) |
886a2506 | 1995 | { |
34e967a5 | 1996 | h->root.u.def.section = htab->splt; |
886a2506 NC |
1997 | h->root.u.def.value = loc; |
1998 | } | |
1999 | h->plt.offset = loc; | |
2000 | } | |
34e967a5 MC |
2001 | else |
2002 | { | |
2003 | h->plt.offset = (bfd_vma) -1; | |
2004 | h->needs_plt = 0; | |
2005 | } | |
2006 | return TRUE; | |
886a2506 | 2007 | } |
34e967a5 MC |
2008 | |
2009 | /* If this is a weak symbol, and there is a real definition, the | |
2010 | processor independent code will have arranged for us to see the | |
2011 | real definition first, and we can just use the same value. */ | |
2012 | if (h->u.weakdef != NULL) | |
886a2506 | 2013 | { |
34e967a5 MC |
2014 | BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined |
2015 | || h->u.weakdef->root.type == bfd_link_hash_defweak); | |
2016 | h->root.u.def.section = h->u.weakdef->root.u.def.section; | |
2017 | h->root.u.def.value = h->u.weakdef->root.u.def.value; | |
2018 | return TRUE; | |
886a2506 NC |
2019 | } |
2020 | ||
34e967a5 MC |
2021 | /* This is a reference to a symbol defined by a dynamic object which |
2022 | is not a function. */ | |
2023 | ||
2024 | /* If we are creating a shared library, we must presume that the | |
2025 | only references to the symbol are via the global offset table. | |
2026 | For such cases we need not do anything here; the relocations will | |
2027 | be handled correctly by relocate_section. */ | |
3c8adaca CZ |
2028 | if (!bfd_link_executable (info)) |
2029 | return TRUE; | |
2030 | ||
2031 | /* If there are no non-GOT references, we do not need a copy | |
2032 | relocation. */ | |
2033 | if (!h->non_got_ref) | |
34e967a5 MC |
2034 | return TRUE; |
2035 | ||
3c8adaca CZ |
2036 | /* If -z nocopyreloc was given, we won't generate them either. */ |
2037 | if (info->nocopyreloc) | |
2038 | { | |
2039 | h->non_got_ref = 0; | |
2040 | return TRUE; | |
2041 | } | |
2042 | ||
34e967a5 MC |
2043 | /* We must allocate the symbol in our .dynbss section, which will |
2044 | become part of the .bss section of the executable. There will be | |
2045 | an entry for this symbol in the .dynsym section. The dynamic | |
2046 | object will contain position independent code, so all references | |
2047 | from the dynamic object to this symbol will go through the global | |
2048 | offset table. The dynamic linker will use the .dynsym entry to | |
2049 | determine the address it must put in the global offset table, so | |
2050 | both the dynamic object and the regular object will refer to the | |
2051 | same memory location for the variable. */ | |
2052 | ||
3c8adaca CZ |
2053 | if (htab == NULL) |
2054 | return FALSE; | |
34e967a5 MC |
2055 | |
2056 | /* We must generate a R_ARC_COPY reloc to tell the dynamic linker to | |
2057 | copy the initial value out of the dynamic object and into the | |
2058 | runtime process image. We need to remember the offset into the | |
2059 | .rela.bss section we are going to use. */ | |
2060 | if ((h->root.u.def.section->flags & SEC_ALLOC) != 0) | |
2061 | { | |
8a36df4d | 2062 | struct elf_arc_link_hash_table *arc_htab = elf_arc_hash_table (info); |
34e967a5 | 2063 | |
9d19e4fd AM |
2064 | BFD_ASSERT (arc_htab->elf.srelbss != NULL); |
2065 | arc_htab->elf.srelbss->size += sizeof (Elf32_External_Rela); | |
34e967a5 MC |
2066 | h->needs_copy = 1; |
2067 | } | |
2068 | ||
8a36df4d | 2069 | /* TODO: Move this also to arc_hash_table. */ |
3c8adaca CZ |
2070 | s = bfd_get_section_by_name (dynobj, ".dynbss"); |
2071 | BFD_ASSERT (s != NULL); | |
34e967a5 | 2072 | |
3c8adaca | 2073 | return _bfd_elf_adjust_dynamic_copy (info, h, s); |
886a2506 NC |
2074 | } |
2075 | ||
2076 | /* Function : elf_arc_finish_dynamic_symbol | |
2077 | Brief : Finish up dynamic symbol handling. We set the | |
34e967a5 | 2078 | contents of various dynamic sections here. |
886a2506 | 2079 | Args : output_bfd : |
34e967a5 MC |
2080 | info : |
2081 | h : | |
2082 | sym : | |
886a2506 | 2083 | Returns : True/False as the return status. */ |
34e967a5 | 2084 | |
886a2506 NC |
2085 | static bfd_boolean |
2086 | elf_arc_finish_dynamic_symbol (bfd * output_bfd, | |
2087 | struct bfd_link_info *info, | |
2088 | struct elf_link_hash_entry *h, | |
2089 | Elf_Internal_Sym * sym) | |
2090 | { | |
34e967a5 | 2091 | if (h->plt.offset != (bfd_vma) -1) |
886a2506 | 2092 | { |
34e967a5 MC |
2093 | relocate_plt_for_symbol (output_bfd, info, h); |
2094 | ||
2095 | if (!h->def_regular) | |
886a2506 | 2096 | { |
34e967a5 MC |
2097 | /* Mark the symbol as undefined, rather than as defined in |
2098 | the .plt section. Leave the value alone. */ | |
2099 | sym->st_shndx = SHN_UNDEF; | |
886a2506 | 2100 | } |
34e967a5 MC |
2101 | } |
2102 | ||
34e967a5 | 2103 | |
08759e0f CM |
2104 | /* This function traverses list of GOT entries and |
2105 | create respective dynamic relocs. */ | |
2106 | /* TODO: Make function to get list and not access the list directly. */ | |
2107 | /* TODO: Move function to relocate_section create this relocs eagerly. */ | |
2108 | create_got_dynrelocs_for_got_info (&h->got.glist, | |
2109 | output_bfd, | |
2110 | info, | |
2111 | h); | |
34e967a5 MC |
2112 | |
2113 | if (h->needs_copy) | |
2114 | { | |
8a36df4d CM |
2115 | struct elf_arc_link_hash_table *arc_htab = elf_arc_hash_table (info); |
2116 | ||
2117 | if (h->dynindx == -1 | |
2118 | || (h->root.type != bfd_link_hash_defined | |
2119 | && h->root.type != bfd_link_hash_defweak) | |
9d19e4fd | 2120 | || arc_htab->elf.srelbss == NULL) |
8a36df4d CM |
2121 | abort (); |
2122 | ||
34e967a5 MC |
2123 | bfd_vma rel_offset = (h->root.u.def.value |
2124 | + h->root.u.def.section->output_section->vma | |
2125 | + h->root.u.def.section->output_offset); | |
2126 | ||
9d19e4fd AM |
2127 | bfd_byte * loc = arc_htab->elf.srelbss->contents |
2128 | + (arc_htab->elf.srelbss->reloc_count * sizeof (Elf32_External_Rela)); | |
2129 | arc_htab->elf.srelbss->reloc_count++; | |
34e967a5 MC |
2130 | |
2131 | Elf_Internal_Rela rel; | |
2132 | rel.r_addend = 0; | |
2133 | rel.r_offset = rel_offset; | |
94e5c971 CZ |
2134 | |
2135 | BFD_ASSERT (h->dynindx != -1); | |
34e967a5 MC |
2136 | rel.r_info = ELF32_R_INFO (h->dynindx, R_ARC_COPY); |
2137 | ||
23a42089 | 2138 | bfd_elf32_swap_reloca_out (output_bfd, &rel, loc); |
886a2506 NC |
2139 | } |
2140 | ||
2141 | /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */ | |
2142 | if (strcmp (h->root.root.string, "_DYNAMIC") == 0 | |
2143 | || strcmp (h->root.root.string, "__DYNAMIC") == 0 | |
2144 | || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0) | |
2145 | sym->st_shndx = SHN_ABS; | |
2146 | ||
2147 | return TRUE; | |
2148 | } | |
2149 | ||
4ade44b7 | 2150 | #define GET_SYMBOL_OR_SECTION(TAG, SYMBOL, SECTION) \ |
34e967a5 MC |
2151 | case TAG: \ |
2152 | if (SYMBOL != NULL) \ | |
4ade44b7 AM |
2153 | h = elf_link_hash_lookup (elf_hash_table (info), \ |
2154 | SYMBOL, FALSE, FALSE, TRUE); \ | |
34e967a5 | 2155 | else if (SECTION != NULL) \ |
4ade44b7 | 2156 | s = bfd_get_linker_section (dynobj, SECTION); \ |
34e967a5 | 2157 | break; |
886a2506 NC |
2158 | |
2159 | /* Function : elf_arc_finish_dynamic_sections | |
2160 | Brief : Finish up the dynamic sections handling. | |
2161 | Args : output_bfd : | |
34e967a5 MC |
2162 | info : |
2163 | h : | |
2164 | sym : | |
886a2506 | 2165 | Returns : True/False as the return status. */ |
34e967a5 | 2166 | |
886a2506 | 2167 | static bfd_boolean |
34e967a5 MC |
2168 | elf_arc_finish_dynamic_sections (bfd * output_bfd, |
2169 | struct bfd_link_info *info) | |
886a2506 NC |
2170 | { |
2171 | struct dynamic_sections ds = arc_create_dynamic_sections (output_bfd, info); | |
34e967a5 | 2172 | struct elf_link_hash_table *htab = elf_hash_table (info); |
886a2506 NC |
2173 | bfd *dynobj = (elf_hash_table (info))->dynobj; |
2174 | ||
2175 | if (ds.sdyn) | |
2176 | { | |
2177 | Elf32_External_Dyn *dyncon, *dynconend; | |
2178 | ||
2179 | dyncon = (Elf32_External_Dyn *) ds.sdyn->contents; | |
08759e0f CM |
2180 | dynconend |
2181 | = (Elf32_External_Dyn *) (ds.sdyn->contents + ds.sdyn->size); | |
886a2506 NC |
2182 | for (; dyncon < dynconend; dyncon++) |
2183 | { | |
2184 | Elf_Internal_Dyn internal_dyn; | |
2185 | bfd_boolean do_it = FALSE; | |
2186 | ||
2187 | struct elf_link_hash_entry *h = NULL; | |
2188 | asection *s = NULL; | |
2189 | ||
2190 | bfd_elf32_swap_dyn_in (dynobj, dyncon, &internal_dyn); | |
2191 | ||
2192 | switch (internal_dyn.d_tag) | |
2193 | { | |
65b94e90 CM |
2194 | GET_SYMBOL_OR_SECTION (DT_INIT, info->init_function, NULL) |
2195 | GET_SYMBOL_OR_SECTION (DT_FINI, info->fini_function, NULL) | |
4ade44b7 AM |
2196 | GET_SYMBOL_OR_SECTION (DT_PLTGOT, NULL, ".plt") |
2197 | GET_SYMBOL_OR_SECTION (DT_JMPREL, NULL, ".rela.plt") | |
2198 | GET_SYMBOL_OR_SECTION (DT_PLTRELSZ, NULL, ".rela.plt") | |
4ade44b7 AM |
2199 | GET_SYMBOL_OR_SECTION (DT_VERSYM, NULL, ".gnu.version") |
2200 | GET_SYMBOL_OR_SECTION (DT_VERDEF, NULL, ".gnu.version_d") | |
2201 | GET_SYMBOL_OR_SECTION (DT_VERNEED, NULL, ".gnu.version_r") | |
886a2506 NC |
2202 | default: |
2203 | break; | |
2204 | } | |
2205 | ||
34e967a5 | 2206 | /* In case the dynamic symbols should be updated with a symbol. */ |
886a2506 NC |
2207 | if (h != NULL |
2208 | && (h->root.type == bfd_link_hash_defined | |
34e967a5 | 2209 | || h->root.type == bfd_link_hash_defweak)) |
886a2506 NC |
2210 | { |
2211 | asection *asec_ptr; | |
2212 | ||
2213 | internal_dyn.d_un.d_val = h->root.u.def.value; | |
2214 | asec_ptr = h->root.u.def.section; | |
2215 | if (asec_ptr->output_section != NULL) | |
2216 | { | |
2217 | internal_dyn.d_un.d_val += | |
08759e0f CM |
2218 | (asec_ptr->output_section->vma |
2219 | + asec_ptr->output_offset); | |
886a2506 NC |
2220 | } |
2221 | else | |
2222 | { | |
34e967a5 MC |
2223 | /* The symbol is imported from another shared |
2224 | library and does not apply to this one. */ | |
886a2506 NC |
2225 | internal_dyn.d_un.d_val = 0; |
2226 | } | |
2227 | do_it = TRUE; | |
2228 | } | |
2229 | else if (s != NULL) /* With a section information. */ | |
2230 | { | |
2231 | switch (internal_dyn.d_tag) | |
2232 | { | |
2233 | case DT_PLTGOT: | |
2234 | case DT_JMPREL: | |
34e967a5 MC |
2235 | case DT_VERSYM: |
2236 | case DT_VERDEF: | |
2237 | case DT_VERNEED: | |
4ade44b7 AM |
2238 | internal_dyn.d_un.d_ptr = (s->output_section->vma |
2239 | + s->output_offset); | |
886a2506 NC |
2240 | do_it = TRUE; |
2241 | break; | |
2242 | ||
2243 | case DT_PLTRELSZ: | |
2244 | internal_dyn.d_un.d_val = s->size; | |
2245 | do_it = TRUE; | |
2246 | break; | |
2247 | ||
886a2506 NC |
2248 | default: |
2249 | break; | |
2250 | } | |
2251 | } | |
2252 | ||
4ade44b7 | 2253 | if (do_it) |
886a2506 NC |
2254 | bfd_elf32_swap_dyn_out (output_bfd, &internal_dyn, dyncon); |
2255 | } | |
2256 | ||
34e967a5 | 2257 | if (htab->splt->size > 0) |
886a2506 | 2258 | { |
34e967a5 | 2259 | relocate_plt_for_entry (output_bfd, info); |
886a2506 NC |
2260 | } |
2261 | ||
34e967a5 MC |
2262 | /* TODO: Validate this. */ |
2263 | elf_section_data (htab->srelplt->output_section)->this_hdr.sh_entsize | |
2264 | = 0xc; | |
886a2506 NC |
2265 | } |
2266 | ||
2267 | /* Fill in the first three entries in the global offset table. */ | |
34e967a5 | 2268 | if (htab->sgot) |
886a2506 | 2269 | { |
3b63d2ce CM |
2270 | struct elf_link_hash_entry *h; |
2271 | h = elf_link_hash_lookup (elf_hash_table (info), "_GLOBAL_OFFSET_TABLE_", | |
2272 | FALSE, FALSE, TRUE); | |
2273 | ||
2274 | if (h != NULL && h->root.type != bfd_link_hash_undefined | |
2275 | && h->root.u.def.section != NULL) | |
886a2506 | 2276 | { |
3b63d2ce CM |
2277 | asection *sec = h->root.u.def.section; |
2278 | ||
886a2506 NC |
2279 | if (ds.sdyn == NULL) |
2280 | bfd_put_32 (output_bfd, (bfd_vma) 0, | |
3b63d2ce | 2281 | sec->contents); |
886a2506 NC |
2282 | else |
2283 | bfd_put_32 (output_bfd, | |
2284 | ds.sdyn->output_section->vma + ds.sdyn->output_offset, | |
3b63d2ce CM |
2285 | sec->contents); |
2286 | bfd_put_32 (output_bfd, (bfd_vma) 0, sec->contents + 4); | |
2287 | bfd_put_32 (output_bfd, (bfd_vma) 0, sec->contents + 8); | |
886a2506 NC |
2288 | } |
2289 | } | |
2290 | ||
886a2506 NC |
2291 | return TRUE; |
2292 | } | |
2293 | ||
34e967a5 MC |
2294 | #define ADD_DYNAMIC_SYMBOL(NAME, TAG) \ |
2295 | h = elf_link_hash_lookup (elf_hash_table (info), \ | |
2296 | NAME, FALSE, FALSE, FALSE); \ | |
2297 | if ((h != NULL && (h->ref_regular || h->def_regular))) \ | |
2298 | if (! _bfd_elf_add_dynamic_entry (info, TAG, 0)) \ | |
886a2506 NC |
2299 | return FALSE; |
2300 | ||
2301 | /* Set the sizes of the dynamic sections. */ | |
2302 | static bfd_boolean | |
34e967a5 MC |
2303 | elf_arc_size_dynamic_sections (bfd * output_bfd, |
2304 | struct bfd_link_info *info) | |
886a2506 | 2305 | { |
34e967a5 | 2306 | bfd * dynobj; |
886a2506 | 2307 | asection * s; |
34e967a5 MC |
2308 | bfd_boolean relocs_exist = FALSE; |
2309 | bfd_boolean reltext_exist = FALSE; | |
886a2506 | 2310 | struct dynamic_sections ds = arc_create_dynamic_sections (output_bfd, info); |
34e967a5 | 2311 | struct elf_link_hash_table *htab = elf_hash_table (info); |
886a2506 NC |
2312 | |
2313 | dynobj = (elf_hash_table (info))->dynobj; | |
2314 | BFD_ASSERT (dynobj != NULL); | |
2315 | ||
2316 | if ((elf_hash_table (info))->dynamic_sections_created) | |
2317 | { | |
2318 | struct elf_link_hash_entry *h; | |
2319 | ||
34e967a5 MC |
2320 | /* Set the contents of the .interp section to the |
2321 | interpreter. */ | |
1a9ccd70 | 2322 | if (!bfd_link_pic (info) && !info->nointerp) |
886a2506 NC |
2323 | { |
2324 | s = bfd_get_section_by_name (dynobj, ".interp"); | |
2325 | BFD_ASSERT (s != NULL); | |
34e967a5 | 2326 | s->size = sizeof (ELF_DYNAMIC_INTERPRETER); |
886a2506 NC |
2327 | s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER; |
2328 | } | |
2329 | ||
34e967a5 MC |
2330 | /* Add some entries to the .dynamic section. We fill in some of |
2331 | the values later, in elf_bfd_final_link, but we must add the | |
2332 | entries now so that we know the final size of the .dynamic | |
2333 | section. Checking if the .init section is present. We also | |
2334 | create DT_INIT and DT_FINI entries if the init_str has been | |
2335 | changed by the user. */ | |
65b94e90 CM |
2336 | ADD_DYNAMIC_SYMBOL (info->init_function, DT_INIT); |
2337 | ADD_DYNAMIC_SYMBOL (info->fini_function, DT_FINI); | |
886a2506 NC |
2338 | } |
2339 | else | |
2340 | { | |
34e967a5 MC |
2341 | /* We may have created entries in the .rela.got section. |
2342 | However, if we are not creating the dynamic sections, we will | |
2343 | not actually use these entries. Reset the size of .rela.got, | |
2344 | which will cause it to get stripped from the output file | |
2345 | below. */ | |
2346 | if (htab->srelgot != NULL) | |
2347 | htab->srelgot->size = 0; | |
886a2506 NC |
2348 | } |
2349 | ||
34e967a5 MC |
2350 | if (htab->splt != NULL && htab->splt->size == 0) |
2351 | htab->splt->flags |= SEC_EXCLUDE; | |
886a2506 NC |
2352 | for (s = dynobj->sections; s != NULL; s = s->next) |
2353 | { | |
34e967a5 | 2354 | if ((s->flags & SEC_LINKER_CREATED) == 0) |
886a2506 NC |
2355 | continue; |
2356 | ||
34e967a5 | 2357 | if (strncmp (s->name, ".rela", 5) == 0) |
886a2506 | 2358 | { |
34e967a5 MC |
2359 | if (s->size == 0) |
2360 | { | |
2361 | s->flags |= SEC_EXCLUDE; | |
2362 | } | |
2363 | else | |
2364 | { | |
2365 | if (strcmp (s->name, ".rela.plt") != 0) | |
2366 | { | |
2367 | const char *outname = | |
2368 | bfd_get_section_name (output_bfd, | |
2369 | htab->srelplt->output_section); | |
2370 | ||
2371 | asection *target = bfd_get_section_by_name (output_bfd, | |
2372 | outname + 4); | |
2373 | ||
2374 | relocs_exist = TRUE; | |
2375 | if (target != NULL && target->size != 0 | |
2376 | && (target->flags & SEC_READONLY) != 0 | |
2377 | && (target->flags & SEC_ALLOC) != 0) | |
2378 | reltext_exist = TRUE; | |
2379 | } | |
2380 | } | |
886a2506 | 2381 | |
34e967a5 MC |
2382 | /* We use the reloc_count field as a counter if we need to |
2383 | copy relocs into the output file. */ | |
2384 | s->reloc_count = 0; | |
886a2506 | 2385 | } |
34e967a5 MC |
2386 | |
2387 | if (strcmp (s->name, ".dynamic") == 0) | |
2388 | continue; | |
2389 | ||
2390 | if (s->size != 0) | |
2391 | s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size); | |
2392 | ||
2393 | if (s->contents == NULL && s->size != 0) | |
2394 | return FALSE; | |
886a2506 NC |
2395 | } |
2396 | ||
2397 | if (ds.sdyn) | |
2398 | { | |
34e967a5 MC |
2399 | /* TODO: Check if this is needed. */ |
2400 | if (!bfd_link_pic (info)) | |
2401 | if (!_bfd_elf_add_dynamic_entry (info, DT_DEBUG, 0)) | |
2402 | return FALSE; | |
2403 | ||
2404 | if (htab->splt && (htab->splt->flags & SEC_EXCLUDE) == 0) | |
886a2506 NC |
2405 | if (!_bfd_elf_add_dynamic_entry (info, DT_PLTGOT, 0) |
2406 | || !_bfd_elf_add_dynamic_entry (info, DT_PLTRELSZ, 0) | |
2407 | || !_bfd_elf_add_dynamic_entry (info, DT_PLTREL, DT_RELA) | |
2408 | || !_bfd_elf_add_dynamic_entry (info, DT_JMPREL, 0) | |
2409 | ) | |
2410 | return FALSE; | |
2411 | ||
2412 | if (relocs_exist == TRUE) | |
2413 | if (!_bfd_elf_add_dynamic_entry (info, DT_RELA, 0) | |
2414 | || !_bfd_elf_add_dynamic_entry (info, DT_RELASZ, 0) | |
2ab2f40d | 2415 | || !_bfd_elf_add_dynamic_entry (info, DT_RELAENT, |
886a2506 NC |
2416 | sizeof (Elf32_External_Rela)) |
2417 | ) | |
2418 | return FALSE; | |
2419 | ||
2420 | if (reltext_exist == TRUE) | |
2421 | if (!_bfd_elf_add_dynamic_entry (info, DT_TEXTREL, 0)) | |
2422 | return FALSE; | |
2423 | } | |
2424 | ||
2425 | return TRUE; | |
2426 | } | |
2427 | ||
0f7f3789 CM |
2428 | |
2429 | /* Classify dynamic relocs such that -z combreloc can reorder and combine | |
2430 | them. */ | |
2431 | static enum elf_reloc_type_class | |
2432 | elf32_arc_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED, | |
2433 | const asection *rel_sec ATTRIBUTE_UNUSED, | |
2434 | const Elf_Internal_Rela *rela) | |
2435 | { | |
2436 | switch ((int) ELF32_R_TYPE (rela->r_info)) | |
2437 | { | |
2438 | case R_ARC_RELATIVE: | |
2439 | return reloc_class_relative; | |
2440 | case R_ARC_JMP_SLOT: | |
2441 | return reloc_class_plt; | |
2442 | case R_ARC_COPY: | |
2443 | return reloc_class_copy; | |
2444 | /* TODO: Needed in future to support ifunc. */ | |
2445 | /* | |
2446 | case R_ARC_IRELATIVE: | |
2447 | return reloc_class_ifunc; | |
2448 | */ | |
2449 | default: | |
2450 | return reloc_class_normal; | |
2451 | } | |
2452 | } | |
2453 | ||
34e967a5 MC |
2454 | const struct elf_size_info arc_elf32_size_info = |
2455 | { | |
2456 | sizeof (Elf32_External_Ehdr), | |
2457 | sizeof (Elf32_External_Phdr), | |
2458 | sizeof (Elf32_External_Shdr), | |
2459 | sizeof (Elf32_External_Rel), | |
2460 | sizeof (Elf32_External_Rela), | |
2461 | sizeof (Elf32_External_Sym), | |
2462 | sizeof (Elf32_External_Dyn), | |
2463 | sizeof (Elf_External_Note), | |
2464 | 4, | |
2465 | 1, | |
2466 | 32, 2, | |
2467 | ELFCLASS32, EV_CURRENT, | |
2468 | bfd_elf32_write_out_phdrs, | |
2469 | bfd_elf32_write_shdrs_and_ehdr, | |
2470 | bfd_elf32_checksum_contents, | |
2471 | bfd_elf32_write_relocs, | |
2472 | bfd_elf32_swap_symbol_in, | |
2473 | bfd_elf32_swap_symbol_out, | |
2474 | bfd_elf32_slurp_reloc_table, | |
2475 | bfd_elf32_slurp_symbol_table, | |
2476 | bfd_elf32_swap_dyn_in, | |
2477 | bfd_elf32_swap_dyn_out, | |
2478 | bfd_elf32_swap_reloc_in, | |
2479 | bfd_elf32_swap_reloc_out, | |
2480 | bfd_elf32_swap_reloca_in, | |
2481 | bfd_elf32_swap_reloca_out | |
2482 | }; | |
2483 | ||
2484 | #define elf_backend_size_info arc_elf32_size_info | |
2485 | ||
34e967a5 MC |
2486 | /* Hook called by the linker routine which adds symbols from an object |
2487 | file. */ | |
2488 | ||
2489 | static bfd_boolean | |
2490 | elf_arc_add_symbol_hook (bfd * abfd, | |
2491 | struct bfd_link_info * info, | |
2492 | Elf_Internal_Sym * sym, | |
2493 | const char ** namep ATTRIBUTE_UNUSED, | |
2494 | flagword * flagsp ATTRIBUTE_UNUSED, | |
2495 | asection ** secp ATTRIBUTE_UNUSED, | |
2496 | bfd_vma * valp ATTRIBUTE_UNUSED) | |
2497 | { | |
a43942db | 2498 | if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC |
34e967a5 MC |
2499 | && (abfd->flags & DYNAMIC) == 0 |
2500 | && bfd_get_flavour (info->output_bfd) == bfd_target_elf_flavour) | |
a43942db | 2501 | elf_tdata (info->output_bfd)->has_gnu_symbols |= elf_gnu_symbol_ifunc; |
34e967a5 MC |
2502 | |
2503 | return TRUE; | |
2504 | } | |
886a2506 | 2505 | |
47f7f636 AK |
2506 | /* GDB expects general purpose registers to be in section .reg. However Linux |
2507 | kernel doesn't create this section and instead writes registers to NOTE | |
2508 | section. It is up to the binutils to create a pseudo-section .reg from the | |
2509 | contents of NOTE. Also BFD will read pid and signal number from NOTE. This | |
2510 | function relies on offsets inside elf_prstatus structure in Linux to be | |
2511 | stable. */ | |
2512 | ||
2513 | static bfd_boolean | |
2514 | elf32_arc_grok_prstatus (bfd *abfd, Elf_Internal_Note *note) | |
2515 | { | |
2516 | int offset; | |
2517 | size_t size; | |
2518 | ||
2519 | switch (note->descsz) | |
2520 | { | |
2521 | default: | |
2522 | return FALSE; | |
2523 | ||
2524 | case 236: /* sizeof (struct elf_prstatus) on Linux/arc. */ | |
2525 | /* pr_cursig */ | |
2526 | elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12); | |
2527 | /* pr_pid */ | |
2528 | elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 24); | |
2529 | /* pr_regs */ | |
2530 | offset = 72; | |
2531 | size = (40 * 4); /* There are 40 registers in user_regs_struct. */ | |
2532 | break; | |
2533 | } | |
2534 | /* Make a ".reg/999" section. */ | |
2535 | return _bfd_elfcore_make_pseudosection (abfd, ".reg", size, | |
2536 | note->descpos + offset); | |
2537 | } | |
2538 | ||
6d00b590 | 2539 | #define TARGET_LITTLE_SYM arc_elf32_le_vec |
47b0e7ad | 2540 | #define TARGET_LITTLE_NAME "elf32-littlearc" |
886a2506 NC |
2541 | #define TARGET_BIG_SYM arc_elf32_be_vec |
2542 | #define TARGET_BIG_NAME "elf32-bigarc" | |
2543 | #define ELF_ARCH bfd_arch_arc | |
8a36df4d | 2544 | #define ELF_TARGET_ID ARC_ELF_DATA |
886a2506 NC |
2545 | #define ELF_MACHINE_CODE EM_ARC_COMPACT |
2546 | #define ELF_MACHINE_ALT1 EM_ARC_COMPACT2 | |
2547 | #define ELF_MAXPAGESIZE 0x2000 | |
2548 | ||
34e967a5 MC |
2549 | #define bfd_elf32_bfd_link_hash_table_create arc_elf_link_hash_table_create |
2550 | ||
2551 | #define bfd_elf32_bfd_merge_private_bfd_data arc_elf_merge_private_bfd_data | |
2552 | #define bfd_elf32_bfd_reloc_type_lookup arc_elf32_bfd_reloc_type_lookup | |
2553 | #define bfd_elf32_bfd_set_private_flags arc_elf_set_private_flags | |
2554 | #define bfd_elf32_bfd_print_private_bfd_data arc_elf_print_private_bfd_data | |
2555 | #define bfd_elf32_bfd_copy_private_bfd_data arc_elf_copy_private_bfd_data | |
2556 | ||
886a2506 NC |
2557 | #define elf_info_to_howto_rel arc_info_to_howto_rel |
2558 | #define elf_backend_object_p arc_elf_object_p | |
2559 | #define elf_backend_final_write_processing arc_elf_final_write_processing | |
2560 | ||
2561 | #define elf_backend_relocate_section elf_arc_relocate_section | |
2562 | #define elf_backend_check_relocs elf_arc_check_relocs | |
9d19e4fd | 2563 | #define elf_backend_create_dynamic_sections _bfd_elf_create_dynamic_sections |
886a2506 | 2564 | |
0f7f3789 CM |
2565 | #define elf_backend_reloc_type_class elf32_arc_reloc_type_class |
2566 | ||
886a2506 NC |
2567 | #define elf_backend_adjust_dynamic_symbol elf_arc_adjust_dynamic_symbol |
2568 | #define elf_backend_finish_dynamic_symbol elf_arc_finish_dynamic_symbol | |
2569 | ||
2570 | #define elf_backend_finish_dynamic_sections elf_arc_finish_dynamic_sections | |
2571 | #define elf_backend_size_dynamic_sections elf_arc_size_dynamic_sections | |
08759e0f | 2572 | #define elf_backend_add_symbol_hook elf_arc_add_symbol_hook |
886a2506 NC |
2573 | |
2574 | #define elf_backend_can_gc_sections 1 | |
2575 | #define elf_backend_want_got_plt 1 | |
2576 | #define elf_backend_plt_readonly 1 | |
34e967a5 | 2577 | #define elf_backend_rela_plts_and_copies_p 1 |
886a2506 NC |
2578 | #define elf_backend_want_plt_sym 0 |
2579 | #define elf_backend_got_header_size 12 | |
64f52338 | 2580 | #define elf_backend_dtrel_excludes_plt 1 |
886a2506 NC |
2581 | |
2582 | #define elf_backend_may_use_rel_p 0 | |
2583 | #define elf_backend_may_use_rela_p 1 | |
2584 | #define elf_backend_default_use_rela_p 1 | |
252b5132 | 2585 | |
47f7f636 AK |
2586 | #define elf_backend_grok_prstatus elf32_arc_grok_prstatus |
2587 | ||
3c8adaca CZ |
2588 | #define elf_backend_default_execstack 0 |
2589 | ||
252b5132 | 2590 | #include "elf32-target.h" |