Commit | Line | Data |
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252b5132 | 1 | /* ARC-specific support for 32-bit ELF |
6f2750fe | 2 | Copyright (C) 1994-2016 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; | |
317 | ||
318 | /* Short-cuts to get to dynamic linker sections. */ | |
319 | asection *srelbss; | |
320 | }; | |
321 | ||
322 | static struct bfd_hash_entry * | |
323 | elf_arc_link_hash_newfunc (struct bfd_hash_entry *entry, | |
324 | struct bfd_hash_table *table, | |
325 | const char *string) | |
326 | { | |
327 | /* Allocate the structure if it has not already been allocated by a | |
328 | subclass. */ | |
329 | if (entry == NULL) | |
330 | { | |
331 | entry = (struct bfd_hash_entry *) | |
332 | bfd_hash_allocate (table, | |
333 | sizeof (struct elf_arc_link_hash_entry)); | |
334 | if (entry == NULL) | |
335 | return entry; | |
336 | } | |
337 | ||
338 | /* Call the allocation method of the superclass. */ | |
339 | entry = _bfd_elf_link_hash_newfunc (entry, table, string); | |
340 | if (entry != NULL) | |
341 | { | |
342 | struct elf_arc_link_hash_entry *eh; | |
343 | ||
344 | eh = (struct elf_arc_link_hash_entry *) entry; | |
345 | eh->dyn_relocs = NULL; | |
346 | } | |
347 | ||
348 | return entry; | |
349 | } | |
350 | ||
351 | /* Destroy an ARC ELF linker hash table. */ | |
352 | static void | |
353 | elf_arc_link_hash_table_free (bfd *obfd) | |
354 | { | |
355 | _bfd_elf_link_hash_table_free (obfd); | |
356 | } | |
357 | ||
358 | /* Create an ARC ELF linker hash table. */ | |
359 | ||
360 | static struct bfd_link_hash_table * | |
361 | arc_elf_link_hash_table_create (bfd *abfd) | |
362 | { | |
363 | struct elf_arc_link_hash_table *ret; | |
364 | ||
365 | ret = (struct elf_arc_link_hash_table *) bfd_zmalloc (sizeof (*ret)); | |
366 | if (ret == NULL) | |
367 | return NULL; | |
368 | ||
369 | if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd, | |
370 | elf_arc_link_hash_newfunc, | |
371 | sizeof (struct elf_arc_link_hash_entry), | |
372 | ARC_ELF_DATA)) | |
373 | { | |
374 | free (ret); | |
375 | return NULL; | |
376 | } | |
377 | ||
378 | ret->srelbss = NULL; | |
379 | ||
380 | ret->elf.init_got_refcount.refcount = 0; | |
381 | ret->elf.init_got_refcount.glist = NULL; | |
382 | ret->elf.init_got_offset.offset = 0; | |
383 | ret->elf.init_got_offset.glist = NULL; | |
384 | ||
385 | ret->elf.root.hash_table_free = elf_arc_link_hash_table_free; | |
386 | ||
387 | return &ret->elf.root; | |
388 | } | |
389 | ||
886a2506 NC |
390 | #define ARC_RELOC_HOWTO(TYPE, VALUE, SIZE, BITSIZE, RELOC_FUNCTION, OVERFLOW, FORMULA) \ |
391 | { BFD_RELOC_##TYPE, R_##TYPE }, | |
252b5132 RH |
392 | static const struct arc_reloc_map arc_reloc_map[] = |
393 | { | |
34e967a5 MC |
394 | #include "elf/arc-reloc.def" |
395 | ||
886a2506 NC |
396 | {BFD_RELOC_NONE, R_ARC_NONE}, |
397 | {BFD_RELOC_8, R_ARC_8}, | |
398 | {BFD_RELOC_16, R_ARC_16}, | |
399 | {BFD_RELOC_24, R_ARC_24}, | |
400 | {BFD_RELOC_32, R_ARC_32}, | |
252b5132 | 401 | }; |
886a2506 | 402 | #undef ARC_RELOC_HOWTO |
252b5132 | 403 | |
094fb063 CZ |
404 | typedef ATTRIBUTE_UNUSED bfd_vma (*replace_func) (unsigned, int ATTRIBUTE_UNUSED); |
405 | ||
406 | #define ARC_RELOC_HOWTO(TYPE, VALUE, SIZE, BITSIZE, RELOC_FUNCTION, OVERFLOW, FORMULA) \ | |
407 | case TYPE: \ | |
408 | func = (void *) RELOC_FUNCTION; \ | |
409 | break; | |
410 | static replace_func | |
411 | get_replace_function (bfd *abfd, unsigned int r_type) | |
412 | { | |
413 | void *func = NULL; | |
414 | ||
415 | switch (r_type) | |
416 | { | |
417 | #include "elf/arc-reloc.def" | |
418 | } | |
419 | ||
420 | if (func == replace_bits24 && bfd_big_endian (abfd)) | |
421 | return (replace_func) replace_bits24_be; | |
422 | ||
423 | return (replace_func) func; | |
424 | } | |
425 | #undef ARC_RELOC_HOWTO | |
426 | ||
252b5132 | 427 | static reloc_howto_type * |
34e967a5 | 428 | arc_elf32_bfd_reloc_type_lookup (bfd * abfd ATTRIBUTE_UNUSED, |
47b0e7ad | 429 | bfd_reloc_code_real_type code) |
252b5132 RH |
430 | { |
431 | unsigned int i; | |
432 | ||
ea04a8f6 | 433 | for (i = ARRAY_SIZE (arc_reloc_map); i--;) |
886a2506 NC |
434 | { |
435 | if (arc_reloc_map[i].bfd_reloc_val == code) | |
f26dd308 | 436 | return arc_elf_howto (arc_reloc_map[i].elf_reloc_val); |
886a2506 | 437 | } |
ea04a8f6 | 438 | |
252b5132 RH |
439 | return NULL; |
440 | } | |
441 | ||
34e967a5 MC |
442 | /* Function to set the ELF flag bits. */ |
443 | static bfd_boolean | |
444 | arc_elf_set_private_flags (bfd *abfd, flagword flags) | |
445 | { | |
446 | elf_elfheader (abfd)->e_flags = flags; | |
447 | elf_flags_init (abfd) = TRUE; | |
448 | return TRUE; | |
449 | } | |
450 | ||
451 | /* Print private flags. */ | |
452 | static bfd_boolean | |
453 | arc_elf_print_private_bfd_data (bfd *abfd, void * ptr) | |
454 | { | |
455 | FILE *file = (FILE *) ptr; | |
456 | flagword flags; | |
457 | ||
458 | BFD_ASSERT (abfd != NULL && ptr != NULL); | |
459 | ||
460 | /* Print normal ELF private data. */ | |
461 | _bfd_elf_print_private_bfd_data (abfd, ptr); | |
462 | ||
463 | flags = elf_elfheader (abfd)->e_flags; | |
464 | fprintf (file, _("private flags = 0x%lx:"), (unsigned long) flags); | |
465 | ||
466 | switch (flags & EF_ARC_MACH_MSK) | |
467 | { | |
34e967a5 MC |
468 | case EF_ARC_CPU_ARCV2HS : fprintf (file, " -mcpu=ARCv2HS"); break; |
469 | case EF_ARC_CPU_ARCV2EM : fprintf (file, " -mcpu=ARCv2EM"); break; | |
470 | case E_ARC_MACH_ARC600 : fprintf (file, " -mcpu=ARC600"); break; | |
471 | case E_ARC_MACH_ARC601 : fprintf (file, " -mcpu=ARC601"); break; | |
472 | case E_ARC_MACH_ARC700 : fprintf (file, " -mcpu=ARC700"); break; | |
473 | default: | |
474 | fprintf (file, "-mcpu=unknown"); | |
475 | break; | |
476 | } | |
477 | ||
478 | switch (flags & EF_ARC_OSABI_MSK) | |
479 | { | |
480 | case E_ARC_OSABI_ORIG : fprintf (file, " (ABI:legacy)"); break; | |
481 | case E_ARC_OSABI_V2 : fprintf (file, " (ABI:v2)"); break; | |
482 | case E_ARC_OSABI_V3 : fprintf (file, " (ABI:v3)"); break; | |
483 | default: | |
484 | fprintf (file, "(ABI:unknown)"); | |
485 | break; | |
486 | } | |
487 | ||
488 | fputc ('\n', file); | |
489 | return TRUE; | |
490 | } | |
491 | ||
492 | /* Copy backend specific data from one object module to another. */ | |
493 | ||
494 | static bfd_boolean | |
495 | arc_elf_copy_private_bfd_data (bfd *ibfd, bfd *obfd) | |
496 | { | |
497 | if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour | |
498 | || bfd_get_flavour (obfd) != bfd_target_elf_flavour) | |
499 | return TRUE; | |
500 | ||
501 | BFD_ASSERT (!elf_flags_init (obfd) | |
502 | || elf_elfheader (obfd)->e_flags == elf_elfheader (ibfd)->e_flags); | |
503 | ||
504 | elf_elfheader (obfd)->e_flags = elf_elfheader (ibfd)->e_flags; | |
505 | elf_flags_init (obfd) = TRUE; | |
506 | ||
507 | /* Copy object attributes. */ | |
508 | _bfd_elf_copy_obj_attributes (ibfd, obfd); | |
509 | ||
510 | return _bfd_elf_copy_private_bfd_data (ibfd, obfd); | |
511 | } | |
512 | ||
157090f7 | 513 | static reloc_howto_type * |
34e967a5 MC |
514 | bfd_elf32_bfd_reloc_name_lookup (bfd * abfd ATTRIBUTE_UNUSED, |
515 | const char *r_name) | |
157090f7 AM |
516 | { |
517 | unsigned int i; | |
518 | ||
886a2506 | 519 | for (i = 0; i < ARRAY_SIZE (elf_arc_howto_table); i++) |
157090f7 AM |
520 | if (elf_arc_howto_table[i].name != NULL |
521 | && strcasecmp (elf_arc_howto_table[i].name, r_name) == 0) | |
f26dd308 | 522 | return arc_elf_howto (i); |
157090f7 AM |
523 | |
524 | return NULL; | |
525 | } | |
526 | ||
886a2506 | 527 | /* Set the howto pointer for an ARC ELF reloc. */ |
34e967a5 | 528 | |
252b5132 | 529 | static void |
886a2506 NC |
530 | arc_info_to_howto_rel (bfd * abfd ATTRIBUTE_UNUSED, |
531 | arelent * cache_ptr, | |
532 | Elf_Internal_Rela * dst) | |
252b5132 RH |
533 | { |
534 | unsigned int r_type; | |
535 | ||
536 | r_type = ELF32_R_TYPE (dst->r_info); | |
886a2506 | 537 | BFD_ASSERT (r_type < (unsigned int) R_ARC_max); |
f26dd308 | 538 | cache_ptr->howto = arc_elf_howto (r_type); |
252b5132 RH |
539 | } |
540 | ||
34e967a5 MC |
541 | /* Merge backend specific data from an object file to the output |
542 | object file when linking. */ | |
543 | ||
544 | static bfd_boolean | |
545 | arc_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd) | |
546 | { | |
547 | unsigned short mach_ibfd; | |
548 | static unsigned short mach_obfd = EM_NONE; | |
549 | flagword out_flags; | |
550 | flagword in_flags; | |
551 | asection *sec; | |
552 | ||
553 | /* Check if we have the same endianess. */ | |
554 | if (! _bfd_generic_verify_endian_match (ibfd, obfd)) | |
555 | { | |
556 | _bfd_error_handler (_("ERROR: Endian Match failed. Attempting to link " | |
557 | "%B with binary %s of opposite endian-ness"), | |
558 | ibfd, bfd_get_filename (obfd)); | |
559 | return FALSE; | |
560 | } | |
561 | ||
562 | /* Collect ELF flags. */ | |
563 | in_flags = elf_elfheader (ibfd)->e_flags & EF_ARC_MACH_MSK; | |
564 | out_flags = elf_elfheader (obfd)->e_flags & EF_ARC_MACH_MSK; | |
565 | ||
566 | if (!elf_flags_init (obfd)) /* First call, no flags set. */ | |
567 | { | |
568 | elf_flags_init (obfd) = TRUE; | |
569 | out_flags = in_flags; | |
570 | } | |
571 | ||
572 | if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour | |
573 | || bfd_get_flavour (obfd) != bfd_target_elf_flavour) | |
574 | return TRUE; | |
575 | ||
576 | /* Check to see if the input BFD actually contains any sections. Do | |
577 | not short-circuit dynamic objects; their section list may be | |
578 | emptied by elf_link_add_object_symbols. */ | |
579 | if (!(ibfd->flags & DYNAMIC)) | |
580 | { | |
581 | bfd_boolean null_input_bfd = TRUE; | |
582 | bfd_boolean only_data_sections = TRUE; | |
583 | ||
584 | for (sec = ibfd->sections; sec != NULL; sec = sec->next) | |
585 | { | |
586 | if ((bfd_get_section_flags (ibfd, sec) | |
587 | & (SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS)) | |
588 | == (SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS)) | |
589 | only_data_sections = FALSE; | |
590 | ||
591 | null_input_bfd = FALSE; | |
592 | } | |
593 | ||
594 | if (null_input_bfd || only_data_sections) | |
595 | return TRUE; | |
596 | } | |
597 | ||
598 | /* Complain about various flag/architecture mismatches. */ | |
599 | mach_ibfd = elf_elfheader (ibfd)->e_machine; | |
600 | if (mach_obfd == EM_NONE) | |
601 | { | |
602 | mach_obfd = mach_ibfd; | |
603 | } | |
604 | else | |
605 | { | |
606 | if (mach_ibfd != mach_obfd) | |
607 | { | |
608 | _bfd_error_handler (_("ERROR: Attempting to link %B " | |
609 | "with a binary %s of different architecture"), | |
610 | ibfd, bfd_get_filename (obfd)); | |
611 | return FALSE; | |
612 | } | |
613 | else if (in_flags != out_flags) | |
614 | { | |
615 | /* Warn if different flags. */ | |
616 | (*_bfd_error_handler) | |
617 | (_("%s: uses different e_flags (0x%lx) fields than " | |
618 | "previous modules (0x%lx)"), | |
619 | bfd_get_filename (ibfd), (long)in_flags, (long)out_flags); | |
620 | if (in_flags && out_flags) | |
621 | return FALSE; | |
622 | /* MWDT doesnt set the eflags hence make sure we choose the | |
623 | eflags set by gcc. */ | |
624 | in_flags = in_flags > out_flags ? in_flags : out_flags; | |
625 | } | |
626 | } | |
627 | ||
628 | /* Update the flags. */ | |
629 | elf_elfheader (obfd)->e_flags = in_flags; | |
630 | ||
631 | if (bfd_get_mach (obfd) < bfd_get_mach (ibfd)) | |
632 | { | |
633 | return bfd_set_arch_mach (obfd, bfd_arch_arc, bfd_get_mach (ibfd)); | |
634 | } | |
635 | ||
636 | return TRUE; | |
637 | } | |
638 | ||
252b5132 | 639 | /* Set the right machine number for an ARC ELF file. */ |
b34976b6 | 640 | static bfd_boolean |
886a2506 | 641 | arc_elf_object_p (bfd * abfd) |
252b5132 | 642 | { |
886a2506 NC |
643 | /* Make sure this is initialised, or you'll have the potential of passing |
644 | garbage---or misleading values---into the call to | |
645 | bfd_default_set_arch_mach (). */ | |
646 | int mach = bfd_mach_arc_arc700; | |
647 | unsigned long arch = elf_elfheader (abfd)->e_flags & EF_ARC_MACH_MSK; | |
648 | unsigned e_machine = elf_elfheader (abfd)->e_machine; | |
252b5132 | 649 | |
886a2506 | 650 | if (e_machine == EM_ARC_COMPACT || e_machine == EM_ARC_COMPACT2) |
252b5132 | 651 | { |
0d2bcfaf NC |
652 | switch (arch) |
653 | { | |
886a2506 NC |
654 | case E_ARC_MACH_ARC600: |
655 | mach = bfd_mach_arc_arc600; | |
656 | break; | |
657 | case E_ARC_MACH_ARC601: | |
658 | mach = bfd_mach_arc_arc601; | |
659 | break; | |
660 | case E_ARC_MACH_ARC700: | |
661 | mach = bfd_mach_arc_arc700; | |
662 | break; | |
663 | case EF_ARC_CPU_ARCV2HS: | |
664 | case EF_ARC_CPU_ARCV2EM: | |
665 | mach = bfd_mach_arc_arcv2; | |
666 | break; | |
667 | default: | |
08759e0f CM |
668 | mach = (e_machine == EM_ARC_COMPACT) |
669 | ? bfd_mach_arc_arc700 : bfd_mach_arc_arcv2; | |
886a2506 NC |
670 | break; |
671 | } | |
672 | } | |
673 | else | |
674 | { | |
675 | if (e_machine == EM_ARC) | |
676 | { | |
677 | (*_bfd_error_handler) | |
678 | (_("Error: The ARC4 architecture is no longer supported.\n")); | |
679 | return FALSE; | |
680 | } | |
681 | else | |
682 | { | |
683 | (*_bfd_error_handler) | |
684 | (_("Warning: unset or old architecture flags. \n" | |
685 | " Use default machine.\n")); | |
0d2bcfaf | 686 | } |
252b5132 | 687 | } |
886a2506 | 688 | |
0d2bcfaf | 689 | return bfd_default_set_arch_mach (abfd, bfd_arch_arc, mach); |
252b5132 RH |
690 | } |
691 | ||
692 | /* The final processing done just before writing out an ARC ELF object file. | |
693 | This gets the ARC architecture right based on the machine number. */ | |
694 | ||
695 | static void | |
34e967a5 MC |
696 | arc_elf_final_write_processing (bfd * abfd, |
697 | bfd_boolean linker ATTRIBUTE_UNUSED) | |
252b5132 | 698 | { |
886a2506 | 699 | unsigned long emf; |
252b5132 | 700 | |
0d2bcfaf | 701 | switch (bfd_get_mach (abfd)) |
252b5132 | 702 | { |
886a2506 | 703 | case bfd_mach_arc_arc600: |
886a2506 | 704 | emf = EM_ARC_COMPACT; |
0d2bcfaf | 705 | break; |
886a2506 | 706 | case bfd_mach_arc_arc601: |
886a2506 | 707 | emf = EM_ARC_COMPACT; |
0d2bcfaf | 708 | break; |
886a2506 | 709 | case bfd_mach_arc_arc700: |
886a2506 | 710 | emf = EM_ARC_COMPACT; |
0d2bcfaf | 711 | break; |
886a2506 | 712 | case bfd_mach_arc_arcv2: |
886a2506 | 713 | emf = EM_ARC_COMPACT2; |
0d2bcfaf | 714 | break; |
886a2506 | 715 | default: |
3c8adaca | 716 | goto DO_NOTHING; |
252b5132 | 717 | } |
34e967a5 | 718 | |
886a2506 | 719 | elf_elfheader (abfd)->e_machine = emf; |
7e458899 | 720 | |
886a2506 NC |
721 | /* Record whatever is the current syscall ABI version. */ |
722 | elf_elfheader (abfd)->e_flags |= E_ARC_OSABI_CURRENT; | |
3c8adaca CZ |
723 | |
724 | DO_NOTHING: | |
725 | return; | |
252b5132 RH |
726 | } |
727 | ||
f7e8b360 NC |
728 | #ifdef ARC_ENABLE_DEBUG |
729 | #define DEBUG_ARC_RELOC(A) debug_arc_reloc (A) | |
886a2506 NC |
730 | |
731 | static void | |
732 | debug_arc_reloc (struct arc_relocation_data reloc_data) | |
733 | { | |
f7e8b360 NC |
734 | ARC_DEBUG ("Reloc type=%s, should_relocate = %s\n", |
735 | reloc_data.howto->name, | |
736 | reloc_data.should_relocate ? "true" : "false"); | |
737 | ARC_DEBUG (" offset = 0x%x, addend = 0x%x\n", | |
738 | (unsigned int) reloc_data.reloc_offset, | |
739 | (unsigned int) reloc_data.reloc_addend); | |
740 | ARC_DEBUG (" Symbol:\n"); | |
741 | ARC_DEBUG (" value = 0x%08x\n", | |
742 | (unsigned int) reloc_data.sym_value); | |
886a2506 NC |
743 | if (reloc_data.sym_section != NULL) |
744 | { | |
f7e8b360 NC |
745 | ARC_DEBUG (" Symbol Section:\n"); |
746 | ARC_DEBUG (" section name = %s, output_offset 0x%08x", | |
747 | reloc_data.sym_section->name, | |
748 | (unsigned int) reloc_data.sym_section->output_offset); | |
34e967a5 | 749 | if (reloc_data.sym_section->output_section != NULL) |
f7e8b360 | 750 | ARC_DEBUG (", output_section->vma = 0x%08x", |
34e967a5 | 751 | ((unsigned int) reloc_data.sym_section->output_section->vma)); |
f7e8b360 NC |
752 | ARC_DEBUG ("\n"); |
753 | if (reloc_data.sym_section->owner && reloc_data.sym_section->owner->filename) | |
754 | ARC_DEBUG (" file: %s\n", reloc_data.sym_section->owner->filename); | |
886a2506 NC |
755 | } |
756 | else | |
34e967a5 | 757 | { |
f7e8b360 | 758 | ARC_DEBUG (" symbol section is NULL\n"); |
34e967a5 | 759 | } |
886a2506 | 760 | |
f7e8b360 | 761 | ARC_DEBUG (" Input_section:\n"); |
886a2506 NC |
762 | if (reloc_data.input_section != NULL) |
763 | { | |
f7e8b360 NC |
764 | ARC_DEBUG (" section name = %s, output_offset 0x%08x, output_section->vma = 0x%08x\n", |
765 | reloc_data.input_section->name, | |
766 | (unsigned int) reloc_data.input_section->output_offset, | |
767 | (unsigned int) reloc_data.input_section->output_section->vma); | |
768 | ARC_DEBUG (" changed_address = 0x%08x\n", | |
769 | (unsigned int) (reloc_data.input_section->output_section->vma | |
770 | + reloc_data.input_section->output_offset | |
771 | + reloc_data.reloc_offset)); | |
772 | ARC_DEBUG (" file: %s\n", reloc_data.input_section->owner->filename); | |
886a2506 NC |
773 | } |
774 | else | |
34e967a5 | 775 | { |
f7e8b360 | 776 | ARC_DEBUG (" input section is NULL\n"); |
34e967a5 | 777 | } |
886a2506 | 778 | } |
f7e8b360 NC |
779 | #else |
780 | #define DEBUG_ARC_RELOC(A) | |
781 | #endif /* ARC_ENABLE_DEBUG */ | |
886a2506 | 782 | |
72f3b6aa CZ |
783 | static bfd_vma |
784 | middle_endian_convert (bfd_vma insn, bfd_boolean do_it) | |
6f4b1afc | 785 | { |
72f3b6aa CZ |
786 | if (do_it) |
787 | { | |
08759e0f CM |
788 | insn |
789 | = ((insn & 0xffff0000) >> 16) | |
790 | | ((insn & 0xffff) << 16); | |
72f3b6aa CZ |
791 | } |
792 | return insn; | |
6f4b1afc CM |
793 | } |
794 | ||
4b0c052e AB |
795 | /* This function is called for relocations that are otherwise marked as NOT |
796 | requiring overflow checks. In here we perform non-standard checks of | |
797 | the relocation value. */ | |
798 | ||
799 | static inline bfd_reloc_status_type | |
800 | arc_special_overflow_checks (const struct arc_relocation_data reloc_data, | |
08759e0f | 801 | bfd_signed_vma relocation, |
4b0c052e AB |
802 | struct bfd_link_info *info ATTRIBUTE_UNUSED) |
803 | { | |
804 | switch (reloc_data.howto->type) | |
805 | { | |
806 | case R_ARC_NPS_CMEM16: | |
807 | if (((relocation >> 16) & 0xffff) != NPS_CMEM_HIGH_VALUE) | |
08759e0f CM |
808 | { |
809 | if (reloc_data.reloc_addend == 0) | |
810 | (*_bfd_error_handler) | |
811 | (_("%B(%A+0x%lx): CMEM relocation to `%s' is invalid, " | |
812 | "16 MSB should be 0x%04x (value is 0x%lx)"), | |
813 | reloc_data.input_section->owner, | |
814 | reloc_data.input_section, | |
815 | reloc_data.reloc_offset, | |
816 | reloc_data.symbol_name, | |
817 | NPS_CMEM_HIGH_VALUE, | |
818 | (relocation)); | |
819 | else | |
820 | (*_bfd_error_handler) | |
821 | (_("%B(%A+0x%lx): CMEM relocation to `%s+0x%lx' is invalid, " | |
822 | "16 MSB should be 0x%04x (value is 0x%lx)"), | |
823 | reloc_data.input_section->owner, | |
824 | reloc_data.input_section, | |
825 | reloc_data.reloc_offset, | |
826 | reloc_data.symbol_name, | |
827 | reloc_data.reloc_addend, | |
828 | NPS_CMEM_HIGH_VALUE, | |
829 | (relocation)); | |
830 | return bfd_reloc_overflow; | |
831 | } | |
4b0c052e AB |
832 | break; |
833 | ||
834 | default: | |
835 | break; | |
836 | } | |
837 | ||
838 | return bfd_reloc_ok; | |
839 | } | |
840 | ||
72f3b6aa CZ |
841 | #define ME(reloc) (reloc) |
842 | ||
843 | #define IS_ME(FORMULA,BFD) ((strstr (FORMULA, "ME") != NULL) \ | |
844 | && (!bfd_big_endian (BFD))) | |
845 | ||
094fb063 | 846 | #define S ((bfd_signed_vma) (reloc_data.sym_value \ |
34e967a5 MC |
847 | + (reloc_data.sym_section->output_section != NULL ? \ |
848 | (reloc_data.sym_section->output_offset \ | |
094fb063 CZ |
849 | + reloc_data.sym_section->output_section->vma) : 0))) |
850 | #define L ((bfd_signed_vma) (reloc_data.sym_value \ | |
34e967a5 MC |
851 | + (reloc_data.sym_section->output_section != NULL ? \ |
852 | (reloc_data.sym_section->output_offset \ | |
094fb063 | 853 | + reloc_data.sym_section->output_section->vma) : 0))) |
886a2506 NC |
854 | #define A (reloc_data.reloc_addend) |
855 | #define B (0) | |
856 | #define G (reloc_data.got_offset_value) | |
34e967a5 MC |
857 | #define GOT (reloc_data.got_symbol_vma) |
858 | #define GOT_BEGIN (htab->sgot->output_section->vma) | |
859 | ||
886a2506 | 860 | #define MES (0) |
34e967a5 MC |
861 | /* P: relative offset to PCL The offset should be to the |
862 | current location aligned to 32 bits. */ | |
094fb063 | 863 | #define P ((bfd_signed_vma) ( \ |
34e967a5 MC |
864 | ( \ |
865 | (reloc_data.input_section->output_section != NULL ? \ | |
866 | reloc_data.input_section->output_section->vma : 0) \ | |
867 | + reloc_data.input_section->output_offset \ | |
094fb063 CZ |
868 | + (reloc_data.reloc_offset - (bitsize >= 32 ? 4 : 0))) \ |
869 | & ~0x3)) | |
870 | #define PDATA ((bfd_signed_vma) ( \ | |
6f4b1afc CM |
871 | (reloc_data.input_section->output_section->vma \ |
872 | + reloc_data.input_section->output_offset \ | |
094fb063 | 873 | + (reloc_data.reloc_offset)))) |
2ab2f40d CM |
874 | #define SECTSTART (bfd_signed_vma) (reloc_data.sym_section->output_section->vma \ |
875 | + reloc_data.sym_section->output_offset) | |
876 | ||
094fb063 CZ |
877 | #define _SDA_BASE_ (bfd_signed_vma) (reloc_data.sdata_begin_symbol_vma) |
878 | #define TLS_REL (bfd_signed_vma) \ | |
879 | ((elf_hash_table (info))->tls_sec->output_section->vma) | |
34e967a5 MC |
880 | #define TLS_TBSS (8) |
881 | #define TCB_SIZE (8) | |
882 | ||
886a2506 NC |
883 | #define none (0) |
884 | ||
f7e8b360 NC |
885 | #ifdef ARC_ENABLE_DEBUG |
886 | #define PRINT_DEBUG_RELOC_INFO_BEFORE(FORMULA, TYPE) \ | |
887 | do \ | |
888 | { \ | |
889 | asection *sym_section = reloc_data.sym_section; \ | |
890 | asection *input_section = reloc_data.input_section; \ | |
891 | ARC_DEBUG ("RELOC_TYPE = " TYPE "\n"); \ | |
892 | ARC_DEBUG ("FORMULA = " FORMULA "\n"); \ | |
893 | ARC_DEBUG ("S = %#lx\n", S); \ | |
894 | ARC_DEBUG ("A = %#lx\n", A); \ | |
895 | ARC_DEBUG ("L = %lx\n", L); \ | |
896 | if (sym_section->output_section != NULL) \ | |
897 | ARC_DEBUG ("symbol_section->vma = %#lx\n", \ | |
898 | sym_section->output_section->vma \ | |
899 | + sym_section->output_offset); \ | |
900 | else \ | |
901 | ARC_DEBUG ("symbol_section->vma = NULL\n"); \ | |
902 | if (input_section->output_section != NULL) \ | |
903 | ARC_DEBUG ("symbol_section->vma = %#lx\n", \ | |
904 | input_section->output_section->vma \ | |
905 | + input_section->output_offset); \ | |
906 | else \ | |
907 | ARC_DEBUG ("symbol_section->vma = NULL\n"); \ | |
908 | ARC_DEBUG ("PCL = %#lx\n", P); \ | |
909 | ARC_DEBUG ("P = %#lx\n", P); \ | |
910 | ARC_DEBUG ("G = %#lx\n", G); \ | |
911 | ARC_DEBUG ("SDA_OFFSET = %#lx\n", _SDA_BASE_); \ | |
34e967a5 | 912 | ARC_DEBUG ("SDA_SET = %d\n", reloc_data.sdata_begin_symbol_vma_set); \ |
f7e8b360 NC |
913 | ARC_DEBUG ("GOT_OFFSET = %#lx\n", GOT); \ |
914 | ARC_DEBUG ("relocation = %#08lx\n", relocation); \ | |
915 | ARC_DEBUG ("before = %#08x\n", (unsigned) insn); \ | |
916 | ARC_DEBUG ("data = %08x (%u) (%d)\n", (unsigned) relocation, \ | |
917 | (unsigned) relocation, (int) relocation); \ | |
918 | } \ | |
919 | while (0) | |
920 | ||
921 | #define PRINT_DEBUG_RELOC_INFO_AFTER \ | |
922 | do \ | |
923 | { \ | |
924 | ARC_DEBUG ("after = 0x%08x\n", (unsigned int) insn); \ | |
925 | } \ | |
926 | while (0) | |
34e967a5 | 927 | |
f7e8b360 NC |
928 | #else |
929 | ||
930 | #define PRINT_DEBUG_RELOC_INFO_BEFORE(...) | |
931 | #define PRINT_DEBUG_RELOC_INFO_AFTER | |
932 | ||
933 | #endif /* ARC_ENABLE_DEBUG */ | |
34e967a5 | 934 | |
886a2506 | 935 | #define ARC_RELOC_HOWTO(TYPE, VALUE, SIZE, BITSIZE, RELOC_FUNCTION, OVERFLOW, FORMULA) \ |
f7e8b360 NC |
936 | case R_##TYPE: \ |
937 | { \ | |
938 | bfd_signed_vma bitsize ATTRIBUTE_UNUSED = BITSIZE; \ | |
939 | relocation = FORMULA ; \ | |
940 | PRINT_DEBUG_RELOC_INFO_BEFORE (#FORMULA, #TYPE); \ | |
941 | insn = middle_endian_convert (insn, IS_ME (#FORMULA, abfd)); \ | |
942 | insn = (* get_replace_function (abfd, TYPE)) (insn, relocation); \ | |
943 | insn = middle_endian_convert (insn, IS_ME (#FORMULA, abfd)); \ | |
944 | PRINT_DEBUG_RELOC_INFO_AFTER; \ | |
945 | } \ | |
886a2506 NC |
946 | break; |
947 | ||
948 | static bfd_reloc_status_type | |
34e967a5 MC |
949 | arc_do_relocation (bfd_byte * contents, |
950 | struct arc_relocation_data reloc_data, | |
951 | struct bfd_link_info *info) | |
886a2506 | 952 | { |
094fb063 | 953 | bfd_signed_vma relocation = 0; |
886a2506 NC |
954 | bfd_vma insn; |
955 | bfd_vma orig_insn ATTRIBUTE_UNUSED; | |
72f3b6aa | 956 | bfd * abfd = reloc_data.input_section->owner; |
34e967a5 | 957 | struct elf_link_hash_table *htab ATTRIBUTE_UNUSED = elf_hash_table (info); |
4b0c052e | 958 | bfd_reloc_status_type flag; |
886a2506 NC |
959 | |
960 | if (reloc_data.should_relocate == FALSE) | |
34e967a5 | 961 | return bfd_reloc_ok; |
886a2506 NC |
962 | |
963 | switch (reloc_data.howto->size) | |
964 | { | |
965 | case 2: | |
72f3b6aa | 966 | insn = arc_bfd_get_32 (abfd, |
886a2506 NC |
967 | contents + reloc_data.reloc_offset, |
968 | reloc_data.input_section); | |
969 | break; | |
970 | case 1: | |
72f3b6aa CZ |
971 | insn = arc_bfd_get_16 (abfd, |
972 | contents + reloc_data.reloc_offset, | |
973 | reloc_data.input_section); | |
974 | break; | |
886a2506 | 975 | case 0: |
72f3b6aa | 976 | insn = arc_bfd_get_8 (abfd, |
886a2506 NC |
977 | contents + reloc_data.reloc_offset, |
978 | reloc_data.input_section); | |
979 | break; | |
980 | default: | |
981 | insn = 0; | |
982 | BFD_ASSERT (0); | |
983 | break; | |
984 | } | |
985 | ||
986 | orig_insn = insn; | |
987 | ||
988 | switch (reloc_data.howto->type) | |
989 | { | |
34e967a5 | 990 | #include "elf/arc-reloc.def" |
886a2506 NC |
991 | |
992 | default: | |
993 | BFD_ASSERT (0); | |
994 | break; | |
995 | } | |
996 | ||
997 | /* Check for relocation overflow. */ | |
998 | if (reloc_data.howto->complain_on_overflow != complain_overflow_dont) | |
4b0c052e | 999 | flag = bfd_check_overflow (reloc_data.howto->complain_on_overflow, |
08759e0f CM |
1000 | reloc_data.howto->bitsize, |
1001 | reloc_data.howto->rightshift, | |
1002 | bfd_arch_bits_per_address (abfd), | |
1003 | relocation); | |
4b0c052e AB |
1004 | else |
1005 | flag = arc_special_overflow_checks (reloc_data, relocation, info); | |
886a2506 | 1006 | |
4b0c052e AB |
1007 | if (flag != bfd_reloc_ok) |
1008 | { | |
f7e8b360 | 1009 | ARC_DEBUG ("Relocation overflows !\n"); |
4b0c052e | 1010 | DEBUG_ARC_RELOC (reloc_data); |
f7e8b360 NC |
1011 | ARC_DEBUG ("Relocation value = signed -> %d, unsigned -> %u" |
1012 | ", hex -> (0x%08x)\n", | |
1013 | (int) relocation, (unsigned) relocation, (int) relocation); | |
886a2506 | 1014 | |
4b0c052e | 1015 | return flag; |
886a2506 | 1016 | } |
886a2506 | 1017 | |
4b0c052e | 1018 | /* Write updated instruction back to memory. */ |
886a2506 NC |
1019 | switch (reloc_data.howto->size) |
1020 | { | |
1021 | case 2: | |
72f3b6aa | 1022 | arc_bfd_put_32 (abfd, insn, |
886a2506 NC |
1023 | contents + reloc_data.reloc_offset, |
1024 | reloc_data.input_section); | |
1025 | break; | |
1026 | case 1: | |
72f3b6aa CZ |
1027 | arc_bfd_put_16 (abfd, insn, |
1028 | contents + reloc_data.reloc_offset, | |
1029 | reloc_data.input_section); | |
1030 | break; | |
886a2506 | 1031 | case 0: |
72f3b6aa | 1032 | arc_bfd_put_8 (abfd, insn, |
886a2506 NC |
1033 | contents + reloc_data.reloc_offset, |
1034 | reloc_data.input_section); | |
1035 | break; | |
1036 | default: | |
1037 | ARC_DEBUG ("size = %d\n", reloc_data.howto->size); | |
1038 | BFD_ASSERT (0); | |
1039 | break; | |
1040 | } | |
1041 | ||
1042 | return bfd_reloc_ok; | |
1043 | } | |
1044 | #undef S | |
1045 | #undef A | |
1046 | #undef B | |
1047 | #undef G | |
1048 | #undef GOT | |
1049 | #undef L | |
1050 | #undef MES | |
1051 | #undef P | |
1052 | #undef SECTSTAR | |
1053 | #undef SECTSTART | |
1054 | #undef _SDA_BASE_ | |
1055 | #undef none | |
1056 | ||
1057 | #undef ARC_RELOC_HOWTO | |
1058 | ||
886a2506 | 1059 | |
886a2506 NC |
1060 | /* Relocate an arc ELF section. |
1061 | Function : elf_arc_relocate_section | |
1062 | Brief : Relocate an arc section, by handling all the relocations | |
34e967a5 | 1063 | appearing in that section. |
886a2506 | 1064 | Args : output_bfd : The bfd being written to. |
34e967a5 MC |
1065 | info : Link information. |
1066 | input_bfd : The input bfd. | |
1067 | input_section : The section being relocated. | |
1068 | contents : contents of the section being relocated. | |
1069 | relocs : List of relocations in the section. | |
1070 | local_syms : is a pointer to the swapped in local symbols. | |
1071 | local_section : is an array giving the section in the input file | |
1072 | corresponding to the st_shndx field of each | |
1073 | local symbol. */ | |
886a2506 | 1074 | static bfd_boolean |
f7e8b360 | 1075 | elf_arc_relocate_section (bfd * output_bfd, |
886a2506 | 1076 | struct bfd_link_info * info, |
f7e8b360 NC |
1077 | bfd * input_bfd, |
1078 | asection * input_section, | |
1079 | bfd_byte * contents, | |
886a2506 NC |
1080 | Elf_Internal_Rela * relocs, |
1081 | Elf_Internal_Sym * local_syms, | |
f7e8b360 | 1082 | asection ** local_sections) |
886a2506 | 1083 | { |
f7e8b360 NC |
1084 | Elf_Internal_Shdr * symtab_hdr; |
1085 | struct elf_link_hash_entry ** sym_hashes; | |
1086 | Elf_Internal_Rela * rel; | |
1087 | Elf_Internal_Rela * wrel; | |
1088 | Elf_Internal_Rela * relend; | |
1089 | struct elf_link_hash_table * htab = elf_hash_table (info); | |
886a2506 NC |
1090 | |
1091 | symtab_hdr = &((elf_tdata (input_bfd))->symtab_hdr); | |
1092 | sym_hashes = elf_sym_hashes (input_bfd); | |
1093 | ||
3c8adaca | 1094 | rel = wrel = relocs; |
886a2506 | 1095 | relend = relocs + input_section->reloc_count; |
3c8adaca | 1096 | for (; rel < relend; wrel++, rel++) |
886a2506 NC |
1097 | { |
1098 | enum elf_arc_reloc_type r_type; | |
34e967a5 | 1099 | reloc_howto_type * howto; |
f7e8b360 | 1100 | unsigned long r_symndx; |
886a2506 | 1101 | struct elf_link_hash_entry * h; |
34e967a5 MC |
1102 | Elf_Internal_Sym * sym; |
1103 | asection * sec; | |
f7e8b360 NC |
1104 | struct elf_link_hash_entry * h2; |
1105 | const char * msg; | |
886a2506 NC |
1106 | |
1107 | struct arc_relocation_data reloc_data = | |
1108 | { | |
34e967a5 MC |
1109 | .reloc_offset = 0, |
1110 | .reloc_addend = 0, | |
1111 | .got_offset_value = 0, | |
1112 | .sym_value = 0, | |
1113 | .sym_section = NULL, | |
1114 | .howto = NULL, | |
1115 | .input_section = NULL, | |
1116 | .sdata_begin_symbol_vma = 0, | |
1117 | .sdata_begin_symbol_vma_set = FALSE, | |
1118 | .got_symbol_vma = 0, | |
1119 | .should_relocate = FALSE | |
886a2506 NC |
1120 | }; |
1121 | ||
34e967a5 MC |
1122 | r_type = ELF32_R_TYPE (rel->r_info); |
1123 | ||
1124 | if (r_type >= (int) R_ARC_max) | |
1125 | { | |
1126 | bfd_set_error (bfd_error_bad_value); | |
1127 | return FALSE; | |
1128 | } | |
3c8adaca | 1129 | howto = arc_elf_howto (r_type); |
34e967a5 MC |
1130 | |
1131 | r_symndx = ELF32_R_SYM (rel->r_info); | |
1132 | ||
1133 | /* If we are generating another .o file and the symbol in not | |
1134 | local, skip this relocation. */ | |
1135 | if (bfd_link_relocatable (info)) | |
1136 | { | |
1137 | /* This is a relocateable link. We don't have to change | |
1138 | anything, unless the reloc is against a section symbol, | |
1139 | in which case we have to adjust according to where the | |
1140 | section symbol winds up in the output section. */ | |
1141 | ||
1142 | /* Checks if this is a local symbol and thus the reloc | |
1143 | might (will??) be against a section symbol. */ | |
1144 | if (r_symndx < symtab_hdr->sh_info) | |
1145 | { | |
1146 | sym = local_syms + r_symndx; | |
1147 | if (ELF_ST_TYPE (sym->st_info) == STT_SECTION) | |
1148 | { | |
1149 | sec = local_sections[r_symndx]; | |
1150 | ||
f7e8b360 | 1151 | /* For RELA relocs. Just adjust the addend |
34e967a5 MC |
1152 | value in the relocation entry. */ |
1153 | rel->r_addend += sec->output_offset + sym->st_value; | |
1154 | ||
f7e8b360 NC |
1155 | ARC_DEBUG ("local symbols reloc (section=%d %s) seen in %s\n", |
1156 | (int) r_symndx, local_sections[r_symndx]->name, | |
1157 | __PRETTY_FUNCTION__); | |
34e967a5 MC |
1158 | } |
1159 | } | |
34e967a5 | 1160 | } |
886a2506 NC |
1161 | |
1162 | h2 = elf_link_hash_lookup (elf_hash_table (info), "__SDATA_BEGIN__", | |
1163 | FALSE, FALSE, TRUE); | |
1164 | ||
1165 | if (reloc_data.sdata_begin_symbol_vma_set == FALSE | |
34e967a5 MC |
1166 | && h2 != NULL && h2->root.type != bfd_link_hash_undefined |
1167 | && h2->root.u.def.section->output_section != NULL) | |
1168 | /* TODO: Verify this condition. */ | |
886a2506 NC |
1169 | { |
1170 | reloc_data.sdata_begin_symbol_vma = | |
08759e0f CM |
1171 | (h2->root.u.def.value |
1172 | + h2->root.u.def.section->output_section->vma); | |
886a2506 NC |
1173 | reloc_data.sdata_begin_symbol_vma_set = TRUE; |
1174 | } | |
1175 | ||
886a2506 NC |
1176 | reloc_data.input_section = input_section; |
1177 | reloc_data.howto = howto; | |
1178 | reloc_data.reloc_offset = rel->r_offset; | |
1179 | reloc_data.reloc_addend = rel->r_addend; | |
1180 | ||
886a2506 NC |
1181 | /* This is a final link. */ |
1182 | h = NULL; | |
1183 | sym = NULL; | |
1184 | sec = NULL; | |
1185 | ||
1186 | if (r_symndx < symtab_hdr->sh_info) /* A local symbol. */ | |
1187 | { | |
1188 | sym = local_syms + r_symndx; | |
1189 | sec = local_sections[r_symndx]; | |
3c8adaca CZ |
1190 | } |
1191 | else | |
1192 | { | |
1193 | /* TODO: This code is repeated from below. We should | |
1194 | clean it and remove duplications. | |
1195 | Sec is used check for discarded sections. | |
1196 | Need to redesign code below. */ | |
1197 | ||
1198 | /* Get the symbol's entry in the symtab. */ | |
1199 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
1200 | ||
1201 | while (h->root.type == bfd_link_hash_indirect | |
1202 | || h->root.type == bfd_link_hash_warning) | |
1203 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
1204 | ||
1205 | /* If we have encountered a definition for this symbol. */ | |
1206 | if (h->root.type == bfd_link_hash_defined | |
1207 | || h->root.type == bfd_link_hash_defweak) | |
1208 | { | |
1209 | reloc_data.sym_value = h->root.u.def.value; | |
1210 | sec = h->root.u.def.section; | |
1211 | } | |
1212 | } | |
1213 | ||
1214 | /* Clean relocs for symbols in discarded sections. */ | |
1215 | if (sec != NULL && discarded_section (sec)) | |
1216 | { | |
1217 | _bfd_clear_contents (howto, input_bfd, input_section, | |
1218 | contents + rel->r_offset); | |
1219 | rel->r_offset = rel->r_offset; | |
1220 | rel->r_info = 0; | |
1221 | rel->r_addend = 0; | |
1222 | ||
1223 | /* For ld -r, remove relocations in debug sections against | |
1224 | sections defined in discarded sections. Not done for | |
1225 | eh_frame editing code expects to be present. */ | |
1226 | if (bfd_link_relocatable (info) | |
1227 | && (input_section->flags & SEC_DEBUGGING)) | |
1228 | wrel--; | |
1229 | ||
1230 | continue; | |
1231 | } | |
1232 | ||
1233 | if (bfd_link_relocatable (info)) | |
1234 | { | |
1235 | if (wrel != rel) | |
1236 | *wrel = *rel; | |
1237 | continue; | |
1238 | } | |
1239 | ||
1240 | if (r_symndx < symtab_hdr->sh_info) /* A local symbol. */ | |
1241 | { | |
886a2506 NC |
1242 | reloc_data.sym_value = sym->st_value; |
1243 | reloc_data.sym_section = sec; | |
4b0c052e | 1244 | reloc_data.symbol_name = |
3c8adaca CZ |
1245 | bfd_elf_string_from_elf_section (input_bfd, |
1246 | symtab_hdr->sh_link, | |
1247 | sym->st_name); | |
886a2506 | 1248 | |
841fdfcd CZ |
1249 | /* Mergeable section handling. */ |
1250 | if ((sec->flags & SEC_MERGE) | |
1251 | && ELF_ST_TYPE (sym->st_info) == STT_SECTION) | |
1252 | { | |
1253 | asection *msec; | |
1254 | msec = sec; | |
1255 | rel->r_addend = _bfd_elf_rel_local_sym (output_bfd, sym, | |
1256 | &msec, rel->r_addend); | |
1257 | rel->r_addend -= (sec->output_section->vma | |
1258 | + sec->output_offset | |
1259 | + sym->st_value); | |
1260 | rel->r_addend += msec->output_section->vma + msec->output_offset; | |
1261 | ||
1262 | reloc_data.reloc_addend = rel->r_addend; | |
1263 | } | |
1264 | ||
34e967a5 MC |
1265 | BFD_ASSERT (htab->sgot != NULL || !is_reloc_for_GOT (howto)); |
1266 | if (htab->sgot != NULL) | |
1267 | reloc_data.got_symbol_vma = htab->sgot->output_section->vma | |
1268 | + htab->sgot->output_offset; | |
886a2506 NC |
1269 | |
1270 | reloc_data.should_relocate = TRUE; | |
1271 | } | |
1272 | else /* Global symbol. */ | |
1273 | { | |
f7e8b360 NC |
1274 | /* FIXME: We should use the RELOC_FOR_GLOBAL_SYMBOL macro |
1275 | (defined in elf-bfd.h) here. */ | |
1276 | ||
886a2506 NC |
1277 | /* Get the symbol's entry in the symtab. */ |
1278 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
1279 | ||
1280 | while (h->root.type == bfd_link_hash_indirect | |
1281 | || h->root.type == bfd_link_hash_warning) | |
1282 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
1283 | ||
3c8adaca CZ |
1284 | /* TODO: Need to validate what was the intention. */ |
1285 | /* BFD_ASSERT ((h->dynindx == -1) || (h->forced_local != 0)); */ | |
4b0c052e | 1286 | reloc_data.symbol_name = h->root.root.string; |
3c8adaca | 1287 | |
886a2506 NC |
1288 | /* If we have encountered a definition for this symbol. */ |
1289 | if (h->root.type == bfd_link_hash_defined | |
1290 | || h->root.type == bfd_link_hash_defweak) | |
1291 | { | |
1292 | reloc_data.sym_value = h->root.u.def.value; | |
1293 | reloc_data.sym_section = h->root.u.def.section; | |
1294 | ||
1295 | reloc_data.should_relocate = TRUE; | |
1296 | ||
34e967a5 | 1297 | if (is_reloc_for_GOT (howto) && !bfd_link_pic (info)) |
886a2506 | 1298 | { |
34e967a5 MC |
1299 | /* TODO: Change it to use arc_do_relocation with |
1300 | ARC_32 reloc. Try to use ADD_RELA macro. */ | |
886a2506 NC |
1301 | bfd_vma relocation = |
1302 | reloc_data.sym_value + reloc_data.reloc_addend | |
34e967a5 MC |
1303 | + (reloc_data.sym_section->output_section != NULL ? |
1304 | (reloc_data.sym_section->output_offset | |
1305 | + reloc_data.sym_section->output_section->vma) | |
1306 | : 0); | |
1307 | ||
1308 | BFD_ASSERT (h->got.glist); | |
1309 | bfd_vma got_offset = h->got.glist->offset; | |
1310 | bfd_put_32 (output_bfd, relocation, | |
1311 | htab->sgot->contents + got_offset); | |
1312 | } | |
1313 | if (is_reloc_for_PLT (howto) && h->plt.offset != (bfd_vma) -1) | |
1314 | { | |
1315 | /* TODO: This is repeated up here. */ | |
1316 | reloc_data.sym_value = h->plt.offset; | |
1317 | reloc_data.sym_section = htab->splt; | |
886a2506 NC |
1318 | } |
1319 | } | |
1320 | else if (h->root.type == bfd_link_hash_undefweak) | |
1321 | { | |
1322 | /* Is weak symbol and has no definition. */ | |
34e967a5 MC |
1323 | if (is_reloc_for_GOT (howto)) |
1324 | { | |
1325 | reloc_data.sym_value = h->root.u.def.value; | |
1326 | reloc_data.sym_section = htab->sgot; | |
1327 | reloc_data.should_relocate = TRUE; | |
1328 | } | |
1329 | else if (is_reloc_for_PLT (howto) | |
1330 | && h->plt.offset != (bfd_vma) -1) | |
1331 | { | |
1332 | /* TODO: This is repeated up here. */ | |
1333 | reloc_data.sym_value = h->plt.offset; | |
1334 | reloc_data.sym_section = htab->splt; | |
1335 | reloc_data.should_relocate = TRUE; | |
1336 | } | |
1337 | else | |
1338 | continue; | |
886a2506 NC |
1339 | } |
1340 | else | |
1341 | { | |
1342 | if (is_reloc_for_GOT (howto)) | |
1343 | { | |
886a2506 | 1344 | reloc_data.sym_value = h->root.u.def.value; |
34e967a5 | 1345 | reloc_data.sym_section = htab->sgot; |
886a2506 NC |
1346 | |
1347 | reloc_data.should_relocate = TRUE; | |
1348 | } | |
1349 | else if (is_reloc_for_PLT (howto)) | |
1350 | { | |
7e458899 CZ |
1351 | /* Fail if it is linking for PIE and the symbol is |
1352 | undefined. */ | |
1a72702b AM |
1353 | if (bfd_link_executable (info)) |
1354 | (*info->callbacks->undefined_symbol) | |
1355 | (info, h->root.root.string, input_bfd, input_section, | |
1356 | rel->r_offset, TRUE); | |
886a2506 | 1357 | reloc_data.sym_value = h->plt.offset; |
34e967a5 | 1358 | reloc_data.sym_section = htab->splt; |
886a2506 NC |
1359 | |
1360 | reloc_data.should_relocate = TRUE; | |
1361 | } | |
8a36df4d | 1362 | else if (!bfd_link_pic (info) || bfd_link_executable (info)) |
1a72702b AM |
1363 | (*info->callbacks->undefined_symbol) |
1364 | (info, h->root.root.string, input_bfd, input_section, | |
1365 | rel->r_offset, TRUE); | |
886a2506 NC |
1366 | } |
1367 | ||
34e967a5 MC |
1368 | BFD_ASSERT (htab->sgot != NULL || !is_reloc_for_GOT (howto)); |
1369 | if (htab->sgot != NULL) | |
1370 | reloc_data.got_symbol_vma = htab->sgot->output_section->vma | |
1371 | + htab->sgot->output_offset; | |
886a2506 NC |
1372 | } |
1373 | ||
08759e0f CM |
1374 | if ((is_reloc_for_GOT (howto) |
1375 | || is_reloc_for_TLS (howto))) | |
1376 | { | |
980aa3e6 CM |
1377 | reloc_data.should_relocate = TRUE; |
1378 | ||
08759e0f CM |
1379 | struct got_entry **list |
1380 | = get_got_entry_list_for_symbol (output_bfd, r_symndx, h); | |
1381 | ||
1382 | reloc_data.got_offset_value | |
1383 | = relocate_fix_got_relocs_for_got_info (list, | |
1384 | tls_type_for_reloc (howto), | |
1385 | info, | |
1386 | output_bfd, | |
1387 | r_symndx, | |
1388 | local_syms, | |
1389 | local_sections, | |
1390 | h, | |
1391 | &reloc_data); | |
1392 | ||
1393 | if (h == NULL) | |
1394 | { | |
1395 | create_got_dynrelocs_for_single_entry ( | |
1396 | got_entry_for_type (list, | |
1397 | arc_got_entry_type_for_reloc (howto)), | |
1398 | output_bfd, info, NULL); | |
1399 | } | |
1400 | } | |
f7e8b360 | 1401 | |
34e967a5 MC |
1402 | switch (r_type) |
1403 | { | |
1404 | case R_ARC_32: | |
1405 | case R_ARC_32_ME: | |
1406 | case R_ARC_PC32: | |
1407 | case R_ARC_32_PCREL: | |
8a36df4d | 1408 | if ((bfd_link_pic (info)) |
34e967a5 MC |
1409 | && ((r_type != R_ARC_PC32 && r_type != R_ARC_32_PCREL) |
1410 | || (h != NULL | |
1411 | && h->dynindx != -1 | |
1412 | && (!info->symbolic || !h->def_regular)))) | |
1413 | { | |
1414 | Elf_Internal_Rela outrel; | |
1415 | bfd_byte *loc; | |
1416 | bfd_boolean skip = FALSE; | |
1417 | bfd_boolean relocate = FALSE; | |
1418 | asection *sreloc = _bfd_elf_get_dynamic_reloc_section | |
1419 | (input_bfd, input_section, | |
1420 | /*RELA*/ TRUE); | |
1421 | ||
1422 | BFD_ASSERT (sreloc != NULL); | |
1423 | ||
1424 | outrel.r_offset = _bfd_elf_section_offset (output_bfd, | |
1425 | info, | |
1426 | input_section, | |
1427 | rel->r_offset); | |
1428 | if (outrel.r_offset == (bfd_vma) -1) | |
1429 | skip = TRUE; | |
1430 | ||
1431 | outrel.r_addend = rel->r_addend; | |
1432 | outrel.r_offset += (input_section->output_section->vma | |
1433 | + input_section->output_offset); | |
1434 | ||
3c8adaca | 1435 | #define IS_ARC_PCREL_TYPE(TYPE) \ |
f7e8b360 | 1436 | ( (TYPE == R_ARC_PC32) \ |
3c8adaca | 1437 | || (TYPE == R_ARC_32_PCREL)) |
f7e8b360 | 1438 | |
34e967a5 MC |
1439 | if (skip) |
1440 | { | |
1441 | memset (&outrel, 0, sizeof outrel); | |
1442 | relocate = FALSE; | |
1443 | } | |
3c8adaca CZ |
1444 | else if (h != NULL |
1445 | && h->dynindx != -1 | |
1446 | && ((IS_ARC_PCREL_TYPE (r_type)) | |
1447 | || !(bfd_link_executable (info) | |
1448 | || SYMBOLIC_BIND (info, h)) | |
1449 | || ! h->def_regular)) | |
34e967a5 | 1450 | { |
94e5c971 | 1451 | BFD_ASSERT (h != NULL); |
34e967a5 MC |
1452 | if ((input_section->flags & SEC_ALLOC) != 0) |
1453 | relocate = FALSE; | |
1454 | else | |
1455 | relocate = TRUE; | |
94e5c971 CZ |
1456 | |
1457 | BFD_ASSERT (h->dynindx != -1); | |
34e967a5 MC |
1458 | outrel.r_info = ELF32_R_INFO (h->dynindx, r_type); |
1459 | } | |
1460 | else | |
1461 | { | |
1462 | /* Handle local symbols, they either do not have a | |
1463 | global hash table entry (h == NULL), or are | |
1464 | forced local due to a version script | |
1465 | (h->forced_local), or the third condition is | |
1466 | legacy, it appears to say something like, for | |
1467 | links where we are pre-binding the symbols, or | |
1468 | there's not an entry for this symbol in the | |
1469 | dynamic symbol table, and it's a regular symbol | |
1470 | not defined in a shared object, then treat the | |
1471 | symbol as local, resolve it now. */ | |
3c8adaca CZ |
1472 | relocate = TRUE; |
1473 | /* outrel.r_addend = 0; */ | |
1474 | outrel.r_info = ELF32_R_INFO (0, R_ARC_RELATIVE); | |
34e967a5 MC |
1475 | } |
1476 | ||
1477 | BFD_ASSERT (sreloc->contents != 0); | |
1478 | ||
1479 | loc = sreloc->contents; | |
1480 | loc += sreloc->reloc_count * sizeof (Elf32_External_Rela); | |
1481 | sreloc->reloc_count += 1; | |
1482 | ||
1483 | bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); | |
1484 | ||
1485 | if (relocate == FALSE) | |
1486 | continue; | |
1487 | } | |
1488 | break; | |
1489 | default: | |
1490 | break; | |
1491 | } | |
1492 | ||
1493 | if (is_reloc_SDA_relative (howto) | |
1494 | && (reloc_data.sdata_begin_symbol_vma_set == FALSE)) | |
886a2506 NC |
1495 | { |
1496 | (*_bfd_error_handler) | |
1497 | ("Error: Linker symbol __SDATA_BEGIN__ not found"); | |
1498 | bfd_set_error (bfd_error_bad_value); | |
1499 | return FALSE; | |
1500 | } | |
1501 | ||
1502 | DEBUG_ARC_RELOC (reloc_data); | |
34e967a5 | 1503 | |
2ab2f40d | 1504 | /* Make sure we have with a dynamic linker. In case of GOT and PLT |
08759e0f | 1505 | the sym_section should point to .got or .plt respectively. */ |
815dc1bc CZ |
1506 | if ((is_reloc_for_GOT (howto) || is_reloc_for_PLT (howto)) |
1507 | && reloc_data.sym_section == NULL) | |
2ab2f40d CM |
1508 | { |
1509 | (*_bfd_error_handler) | |
1510 | (_("GOT and PLT relocations cannot be fixed with a non dynamic linker.")); | |
1511 | bfd_set_error (bfd_error_bad_value); | |
1512 | return FALSE; | |
1513 | } | |
1514 | ||
f7e8b360 NC |
1515 | msg = NULL; |
1516 | switch (arc_do_relocation (contents, reloc_data, info)) | |
1517 | { | |
1518 | case bfd_reloc_ok: | |
1519 | continue; /* The reloc processing loop. */ | |
1520 | ||
1521 | case bfd_reloc_overflow: | |
1522 | (*info->callbacks->reloc_overflow) | |
1523 | (info, (h ? &h->root : NULL), reloc_data.symbol_name, howto->name, (bfd_vma) 0, | |
1524 | input_bfd, input_section, rel->r_offset); | |
1525 | break; | |
1526 | ||
1527 | case bfd_reloc_undefined: | |
1528 | (*info->callbacks->undefined_symbol) | |
1529 | (info, reloc_data.symbol_name, input_bfd, input_section, rel->r_offset, TRUE); | |
1530 | break; | |
1531 | ||
1532 | case bfd_reloc_other: | |
1533 | msg = _("%B(%A): warning: unaligned access to symbol '%s' in the small data area"); | |
1534 | break; | |
1535 | ||
1536 | case bfd_reloc_outofrange: | |
1537 | msg = _("%B(%A): internal error: out of range error"); | |
1538 | break; | |
1539 | ||
1540 | case bfd_reloc_notsupported: | |
1541 | msg = _("%B(%A): internal error: unsupported relocation error"); | |
1542 | break; | |
1543 | ||
1544 | case bfd_reloc_dangerous: | |
1545 | msg = _("%B(%A): internal error: dangerous relocation"); | |
1546 | break; | |
1547 | ||
1548 | default: | |
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 | ||
1565 | /* Create .plt, .rela.plt, .got, .got.plt, .rela.got, .dynbss, and | |
1566 | .rela.bss sections in DYNOBJ, and set up shortcuts to them in our | |
1567 | hash table. */ | |
1568 | ||
1569 | static bfd_boolean | |
1570 | arc_elf_create_dynamic_sections (bfd *dynobj, | |
1571 | struct bfd_link_info *info) | |
1572 | { | |
1573 | struct elf_arc_link_hash_table *htab; | |
1574 | ||
1575 | if (!_bfd_elf_create_dynamic_sections (dynobj, info)) | |
1576 | return FALSE; | |
1577 | ||
1578 | htab = elf_arc_hash_table (info); | |
1579 | if (htab == NULL) | |
1580 | return FALSE; | |
1581 | ||
1582 | if (bfd_link_executable (info)) | |
1583 | { | |
1584 | /* Always allow copy relocs for building executables. */ | |
1585 | asection *s = bfd_get_linker_section (dynobj, ".rela.bss"); | |
1586 | if (s == NULL) | |
1587 | { | |
1588 | const struct elf_backend_data *bed = get_elf_backend_data (dynobj); | |
1589 | s = bfd_make_section_anyway_with_flags (dynobj, | |
1590 | ".rela.bss", | |
1591 | (bed->dynamic_sec_flags | |
1592 | | SEC_READONLY)); | |
1593 | if (s == NULL | |
1594 | || ! bfd_set_section_alignment (dynobj, s, | |
1595 | bed->s->log_file_align)) | |
1596 | return FALSE; | |
1597 | } | |
1598 | htab->srelbss = s; | |
1599 | } | |
1600 | ||
1601 | return TRUE; | |
1602 | } | |
1603 | ||
886a2506 NC |
1604 | static struct dynamic_sections |
1605 | arc_create_dynamic_sections (bfd * abfd, struct bfd_link_info *info) | |
1606 | { | |
34e967a5 MC |
1607 | struct elf_link_hash_table *htab; |
1608 | bfd *dynobj; | |
886a2506 | 1609 | struct dynamic_sections ds = |
886a2506 | 1610 | { |
34e967a5 MC |
1611 | .initialized = FALSE, |
1612 | .sgot = NULL, | |
1613 | .srelgot = NULL, | |
1614 | .sgotplt = NULL, | |
1615 | .srelgotplt = NULL, | |
1616 | .sdyn = NULL, | |
1617 | .splt = NULL, | |
1618 | .srelplt = NULL | |
1619 | }; | |
1620 | ||
1621 | htab = elf_hash_table (info); | |
1622 | BFD_ASSERT (htab); | |
1623 | ||
1624 | /* Create dynamic sections for relocatable executables so that we | |
1625 | can copy relocations. */ | |
1626 | if (! htab->dynamic_sections_created && bfd_link_pic (info)) | |
1627 | { | |
1628 | if (! _bfd_elf_link_create_dynamic_sections (abfd, info)) | |
1629 | BFD_ASSERT (0); | |
886a2506 | 1630 | } |
886a2506 | 1631 | |
34e967a5 | 1632 | dynobj = (elf_hash_table (info))->dynobj; |
886a2506 | 1633 | |
34e967a5 | 1634 | if (dynobj) |
886a2506 | 1635 | { |
34e967a5 MC |
1636 | ds.sgot = htab->sgot; |
1637 | ds.srelgot = htab->srelgot; | |
886a2506 | 1638 | |
34e967a5 MC |
1639 | ds.sgotplt = bfd_get_section_by_name (dynobj, ".got.plt"); |
1640 | ds.srelgotplt = ds.srelplt; | |
886a2506 | 1641 | |
34e967a5 MC |
1642 | ds.splt = bfd_get_section_by_name (dynobj, ".plt"); |
1643 | ds.srelplt = bfd_get_section_by_name (dynobj, ".rela.plt"); | |
1644 | } | |
1645 | ||
1646 | if (htab->dynamic_sections_created) | |
1647 | { | |
1648 | ds.sdyn = bfd_get_section_by_name (dynobj, ".dynamic"); | |
1649 | } | |
886a2506 NC |
1650 | |
1651 | ds.initialized = TRUE; | |
1652 | ||
1653 | return ds; | |
1654 | } | |
1655 | ||
886a2506 | 1656 | static bfd_boolean |
08759e0f | 1657 | elf_arc_check_relocs (bfd * abfd, |
886a2506 | 1658 | struct bfd_link_info * info, |
34e967a5 | 1659 | asection * sec, |
886a2506 NC |
1660 | const Elf_Internal_Rela * relocs) |
1661 | { | |
34e967a5 MC |
1662 | Elf_Internal_Shdr * symtab_hdr; |
1663 | struct elf_link_hash_entry ** sym_hashes; | |
34e967a5 MC |
1664 | const Elf_Internal_Rela * rel; |
1665 | const Elf_Internal_Rela * rel_end; | |
1666 | bfd * dynobj; | |
1667 | asection * sreloc = NULL; | |
34e967a5 MC |
1668 | |
1669 | if (bfd_link_relocatable (info)) | |
1670 | return TRUE; | |
886a2506 NC |
1671 | |
1672 | dynobj = (elf_hash_table (info))->dynobj; | |
1673 | symtab_hdr = &((elf_tdata (abfd))->symtab_hdr); | |
1674 | sym_hashes = elf_sym_hashes (abfd); | |
886a2506 NC |
1675 | |
1676 | rel_end = relocs + sec->reloc_count; | |
1677 | for (rel = relocs; rel < rel_end; rel++) | |
1678 | { | |
1679 | enum elf_arc_reloc_type r_type; | |
1680 | reloc_howto_type *howto; | |
1681 | unsigned long r_symndx; | |
1682 | struct elf_link_hash_entry *h; | |
1683 | ||
1684 | r_type = ELF32_R_TYPE (rel->r_info); | |
1685 | ||
1686 | if (r_type >= (int) R_ARC_max) | |
1687 | { | |
1688 | bfd_set_error (bfd_error_bad_value); | |
1689 | return FALSE; | |
1690 | } | |
3c8adaca | 1691 | howto = arc_elf_howto (r_type); |
34e967a5 MC |
1692 | |
1693 | if (dynobj == NULL | |
1694 | && (is_reloc_for_GOT (howto) == TRUE | |
1695 | || is_reloc_for_TLS (howto) == TRUE)) | |
1696 | { | |
1697 | dynobj = elf_hash_table (info)->dynobj = abfd; | |
1698 | if (! _bfd_elf_create_got_section (abfd, info)) | |
1699 | return FALSE; | |
1700 | } | |
886a2506 NC |
1701 | |
1702 | /* Load symbol information. */ | |
1703 | r_symndx = ELF32_R_SYM (rel->r_info); | |
1704 | if (r_symndx < symtab_hdr->sh_info) /* Is a local symbol. */ | |
1705 | h = NULL; | |
1706 | else /* Global one. */ | |
1707 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
1708 | ||
34e967a5 MC |
1709 | switch (r_type) |
1710 | { | |
1711 | case R_ARC_32: | |
1712 | case R_ARC_32_ME: | |
1713 | /* During shared library creation, these relocs should not | |
1714 | appear in a shared library (as memory will be read only | |
1715 | and the dynamic linker can not resolve these. However | |
1716 | the error should not occur for e.g. debugging or | |
1717 | non-readonly sections. */ | |
2ab2f40d | 1718 | if ((bfd_link_dll (info) && !bfd_link_pie (info)) |
34e967a5 | 1719 | && (sec->flags & SEC_ALLOC) != 0 |
3c8adaca CZ |
1720 | && (sec->flags & SEC_READONLY) != 0 |
1721 | && ((sec->flags & SEC_CODE) != 0 | |
1722 | || (sec->flags & SEC_DEBUGGING) != 0)) | |
34e967a5 MC |
1723 | { |
1724 | const char *name; | |
1725 | if (h) | |
1726 | name = h->root.root.string; | |
1727 | else | |
1728 | /* bfd_elf_sym_name (abfd, symtab_hdr, isym, NULL); */ | |
1729 | name = "UNKNOWN"; | |
1730 | (*_bfd_error_handler) | |
1731 | (_("\ | |
1732 | %B: relocation %s against `%s' can not be used when making a shared object; recompile with -fPIC"), | |
1733 | abfd, | |
1734 | arc_elf_howto (r_type)->name, | |
1735 | name); | |
1736 | bfd_set_error (bfd_error_bad_value); | |
1737 | return FALSE; | |
1738 | } | |
1739 | ||
1740 | /* In some cases we are not setting the 'non_got_ref' | |
1741 | flag, even though the relocations don't require a GOT | |
1742 | access. We should extend the testing in this area to | |
1743 | ensure that no significant cases are being missed. */ | |
1744 | if (h) | |
1745 | h->non_got_ref = 1; | |
1746 | /* FALLTHROUGH */ | |
1747 | case R_ARC_PC32: | |
1748 | case R_ARC_32_PCREL: | |
8a36df4d | 1749 | if ((bfd_link_pic (info)) |
34e967a5 MC |
1750 | && ((r_type != R_ARC_PC32 && r_type != R_ARC_32_PCREL) |
1751 | || (h != NULL | |
34e967a5 MC |
1752 | && (!info->symbolic || !h->def_regular)))) |
1753 | { | |
1754 | if (sreloc == NULL) | |
1755 | { | |
1756 | sreloc = _bfd_elf_make_dynamic_reloc_section (sec, dynobj, | |
1757 | 2, abfd, | |
1758 | /*rela*/ | |
1759 | TRUE); | |
1760 | ||
1761 | if (sreloc == NULL) | |
1762 | return FALSE; | |
1763 | } | |
1764 | sreloc->size += sizeof (Elf32_External_Rela); | |
1765 | ||
1766 | } | |
1767 | default: | |
1768 | break; | |
1769 | } | |
1770 | ||
886a2506 NC |
1771 | if (is_reloc_for_PLT (howto) == TRUE) |
1772 | { | |
1773 | if (h == NULL) | |
1774 | continue; | |
1775 | else | |
1776 | h->needs_plt = 1; | |
1777 | } | |
1778 | ||
08759e0f CM |
1779 | /* Add info to the symbol got_entry_list. */ |
1780 | if (is_reloc_for_GOT (howto) == TRUE | |
1781 | || is_reloc_for_TLS (howto) == TRUE) | |
34e967a5 | 1782 | { |
08759e0f CM |
1783 | arc_fill_got_info_for_reloc ( |
1784 | arc_got_entry_type_for_reloc (howto), | |
1785 | get_got_entry_list_for_symbol (abfd, r_symndx, h), | |
1786 | info, | |
1787 | h); | |
34e967a5 MC |
1788 | } |
1789 | } | |
886a2506 | 1790 | |
34e967a5 MC |
1791 | return TRUE; |
1792 | } | |
886a2506 | 1793 | |
34e967a5 | 1794 | #define ELF_DYNAMIC_INTERPRETER "/sbin/ld-uClibc.so" |
886a2506 | 1795 | |
34e967a5 MC |
1796 | static struct plt_version_t * |
1797 | arc_get_plt_version (struct bfd_link_info *info) | |
886a2506 | 1798 | { |
34e967a5 | 1799 | int i; |
886a2506 | 1800 | |
34e967a5 MC |
1801 | for (i = 0; i < 1; i++) |
1802 | { | |
1803 | ARC_DEBUG ("%d: size1 = %d, size2 = %d\n", i, | |
f7e8b360 NC |
1804 | (int) plt_versions[i].entry_size, |
1805 | (int) plt_versions[i].elem_size); | |
34e967a5 | 1806 | } |
886a2506 | 1807 | |
34e967a5 | 1808 | if (bfd_get_mach (info->output_bfd) == bfd_mach_arc_arcv2) |
886a2506 | 1809 | { |
34e967a5 MC |
1810 | if (bfd_link_pic (info)) |
1811 | return &(plt_versions[ELF_ARCV2_PIC]); | |
1812 | else | |
1813 | return &(plt_versions[ELF_ARCV2_ABS]); | |
1814 | } | |
1815 | else | |
886a2506 | 1816 | { |
34e967a5 MC |
1817 | if (bfd_link_pic (info)) |
1818 | return &(plt_versions[ELF_ARC_PIC]); | |
1819 | else | |
1820 | return &(plt_versions[ELF_ARC_ABS]); | |
886a2506 | 1821 | } |
886a2506 NC |
1822 | } |
1823 | ||
1824 | static bfd_vma | |
1825 | add_symbol_to_plt (struct bfd_link_info *info) | |
1826 | { | |
34e967a5 | 1827 | struct elf_link_hash_table *htab = elf_hash_table (info); |
886a2506 NC |
1828 | bfd_vma ret; |
1829 | ||
34e967a5 | 1830 | struct plt_version_t *plt_data = arc_get_plt_version (info); |
886a2506 | 1831 | |
34e967a5 MC |
1832 | /* If this is the first .plt entry, make room for the special first |
1833 | entry. */ | |
1834 | if (htab->splt->size == 0) | |
1835 | htab->splt->size += plt_data->entry_size; | |
886a2506 | 1836 | |
34e967a5 MC |
1837 | ret = htab->splt->size; |
1838 | ||
1839 | htab->splt->size += plt_data->elem_size; | |
f7e8b360 | 1840 | ARC_DEBUG ("PLT_SIZE = %d\n", (int) htab->splt->size); |
34e967a5 MC |
1841 | |
1842 | htab->sgotplt->size += 4; | |
1843 | htab->srelplt->size += sizeof (Elf32_External_Rela); | |
886a2506 NC |
1844 | |
1845 | return ret; | |
1846 | } | |
1847 | ||
34e967a5 MC |
1848 | #define PLT_DO_RELOCS_FOR_ENTRY(ABFD, DS, RELOCS) \ |
1849 | plt_do_relocs_for_symbol (ABFD, DS, RELOCS, 0, 0) | |
886a2506 NC |
1850 | |
1851 | static void | |
34e967a5 MC |
1852 | plt_do_relocs_for_symbol (bfd *abfd, |
1853 | struct elf_link_hash_table *htab, | |
1854 | const struct plt_reloc *reloc, | |
886a2506 NC |
1855 | bfd_vma plt_offset, |
1856 | bfd_vma symbol_got_offset) | |
1857 | { | |
1858 | while (SYM_ONLY (reloc->symbol) != LAST_RELOC) | |
1859 | { | |
1860 | bfd_vma relocation = 0; | |
1861 | ||
1862 | switch (SYM_ONLY (reloc->symbol)) | |
1863 | { | |
1864 | case SGOT: | |
08759e0f CM |
1865 | relocation |
1866 | = htab->sgotplt->output_section->vma | |
1867 | + htab->sgotplt->output_offset + symbol_got_offset; | |
886a2506 NC |
1868 | break; |
1869 | } | |
1870 | relocation += reloc->addend; | |
1871 | ||
34e967a5 MC |
1872 | if (IS_RELATIVE (reloc->symbol)) |
1873 | { | |
1874 | bfd_vma reloc_offset = reloc->offset; | |
1875 | reloc_offset -= (IS_INSN_32 (reloc->symbol)) ? 4 : 0; | |
1876 | reloc_offset -= (IS_INSN_24 (reloc->symbol)) ? 2 : 0; | |
886a2506 | 1877 | |
34e967a5 MC |
1878 | relocation -= htab->splt->output_section->vma |
1879 | + htab->splt->output_offset | |
1880 | + plt_offset + reloc_offset; | |
1881 | } | |
1882 | ||
1883 | /* TODO: being ME is not a property of the relocation but of the | |
1884 | section of which is applying the relocation. */ | |
1e5885b7 | 1885 | if (IS_MIDDLE_ENDIAN (reloc->symbol) && !bfd_big_endian (abfd)) |
886a2506 | 1886 | { |
08759e0f CM |
1887 | relocation |
1888 | = ((relocation & 0xffff0000) >> 16) | |
1889 | | ((relocation & 0xffff) << 16); | |
886a2506 NC |
1890 | } |
1891 | ||
1892 | switch (reloc->size) | |
1893 | { | |
1894 | case 32: | |
34e967a5 | 1895 | bfd_put_32 (htab->splt->output_section->owner, |
886a2506 | 1896 | relocation, |
34e967a5 | 1897 | htab->splt->contents + plt_offset + reloc->offset); |
886a2506 NC |
1898 | break; |
1899 | } | |
1900 | ||
34e967a5 | 1901 | reloc = &(reloc[1]); /* Jump to next relocation. */ |
886a2506 NC |
1902 | } |
1903 | } | |
1904 | ||
1905 | static void | |
34e967a5 MC |
1906 | relocate_plt_for_symbol (bfd *output_bfd, |
1907 | struct bfd_link_info *info, | |
886a2506 NC |
1908 | struct elf_link_hash_entry *h) |
1909 | { | |
34e967a5 MC |
1910 | struct plt_version_t *plt_data = arc_get_plt_version (info); |
1911 | struct elf_link_hash_table *htab = elf_hash_table (info); | |
886a2506 | 1912 | |
34e967a5 MC |
1913 | bfd_vma plt_index = (h->plt.offset - plt_data->entry_size) |
1914 | / plt_data->elem_size; | |
886a2506 NC |
1915 | bfd_vma got_offset = (plt_index + 3) * 4; |
1916 | ||
f7e8b360 NC |
1917 | ARC_DEBUG ("arc_info: PLT_OFFSET = %#lx, PLT_ENTRY_VMA = %#lx, \ |
1918 | GOT_ENTRY_OFFSET = %#lx, GOT_ENTRY_VMA = %#lx, for symbol %s\n", | |
1919 | (long) h->plt.offset, | |
1920 | (long) (htab->splt->output_section->vma | |
1921 | + htab->splt->output_offset | |
1922 | + h->plt.offset), | |
1923 | (long) got_offset, | |
1924 | (long) (htab->sgotplt->output_section->vma | |
1925 | + htab->sgotplt->output_offset | |
1926 | + got_offset), | |
34e967a5 MC |
1927 | h->root.root.string); |
1928 | ||
1e5885b7 CZ |
1929 | { |
1930 | bfd_vma i = 0; | |
1931 | uint16_t *ptr = (uint16_t *) plt_data->elem; | |
f7e8b360 | 1932 | |
1e5885b7 CZ |
1933 | for (i = 0; i < plt_data->elem_size/2; i++) |
1934 | { | |
1935 | uint16_t data = ptr[i]; | |
1936 | bfd_put_16 (output_bfd, | |
1937 | (bfd_vma) data, | |
1938 | htab->splt->contents + h->plt.offset + (i*2)); | |
1939 | } | |
1940 | } | |
1941 | ||
34e967a5 MC |
1942 | plt_do_relocs_for_symbol (output_bfd, htab, |
1943 | plt_data->elem_relocs, | |
1944 | h->plt.offset, | |
886a2506 | 1945 | got_offset); |
34e967a5 MC |
1946 | |
1947 | /* Fill in the entry in the global offset table. */ | |
1948 | bfd_put_32 (output_bfd, | |
1949 | (bfd_vma) (htab->splt->output_section->vma | |
1950 | + htab->splt->output_offset), | |
1951 | htab->sgotplt->contents + got_offset); | |
1952 | ||
1953 | /* TODO: Fill in the entry in the .rela.plt section. */ | |
1954 | { | |
1955 | Elf_Internal_Rela rel; | |
1956 | bfd_byte *loc; | |
1957 | ||
1958 | rel.r_offset = (htab->sgotplt->output_section->vma | |
1959 | + htab->sgotplt->output_offset | |
1960 | + got_offset); | |
1961 | rel.r_addend = 0; | |
94e5c971 CZ |
1962 | |
1963 | BFD_ASSERT (h->dynindx != -1); | |
34e967a5 MC |
1964 | rel.r_info = ELF32_R_INFO (h->dynindx, R_ARC_JMP_SLOT); |
1965 | ||
1966 | loc = htab->srelplt->contents; | |
1967 | loc += plt_index * sizeof (Elf32_External_Rela); /* relA */ | |
1968 | bfd_elf32_swap_reloca_out (output_bfd, &rel, loc); | |
1969 | } | |
886a2506 NC |
1970 | } |
1971 | ||
1972 | static void | |
34e967a5 MC |
1973 | relocate_plt_for_entry (bfd *abfd, |
1974 | struct bfd_link_info *info) | |
886a2506 | 1975 | { |
34e967a5 MC |
1976 | struct plt_version_t *plt_data = arc_get_plt_version (info); |
1977 | struct elf_link_hash_table *htab = elf_hash_table (info); | |
886a2506 | 1978 | |
1e5885b7 CZ |
1979 | { |
1980 | bfd_vma i = 0; | |
1981 | uint16_t *ptr = (uint16_t *) plt_data->entry; | |
1982 | for (i = 0; i < plt_data->entry_size/2; i++) | |
1983 | { | |
1984 | uint16_t data = ptr[i]; | |
1985 | bfd_put_16 (abfd, | |
1986 | (bfd_vma) data, | |
1987 | htab->splt->contents + (i*2)); | |
1988 | } | |
1989 | } | |
34e967a5 | 1990 | PLT_DO_RELOCS_FOR_ENTRY (abfd, htab, plt_data->entry_relocs); |
886a2506 NC |
1991 | } |
1992 | ||
34e967a5 MC |
1993 | /* Desc : Adjust a symbol defined by a dynamic object and referenced |
1994 | by a regular object. The current definition is in some section of | |
1995 | the dynamic object, but we're not including those sections. We | |
1996 | have to change the definition to something the rest of the link can | |
886a2506 NC |
1997 | understand. */ |
1998 | ||
1999 | static bfd_boolean | |
2000 | elf_arc_adjust_dynamic_symbol (struct bfd_link_info *info, | |
2001 | struct elf_link_hash_entry *h) | |
2002 | { | |
34e967a5 | 2003 | asection *s; |
886a2506 | 2004 | bfd *dynobj = (elf_hash_table (info))->dynobj; |
34e967a5 | 2005 | struct elf_link_hash_table *htab = elf_hash_table (info); |
886a2506 | 2006 | |
34e967a5 MC |
2007 | if (h->type == STT_FUNC |
2008 | || h->type == STT_GNU_IFUNC | |
2009 | || h->needs_plt == 1) | |
886a2506 NC |
2010 | { |
2011 | if (!bfd_link_pic (info) && !h->def_dynamic && !h->ref_dynamic) | |
2012 | { | |
2013 | /* This case can occur if we saw a PLT32 reloc in an input | |
2014 | file, but the symbol was never referred to by a dynamic | |
2015 | object. In such a case, we don't actually need to build | |
2016 | a procedure linkage table, and we can just do a PC32 | |
2017 | reloc instead. */ | |
2018 | BFD_ASSERT (h->needs_plt); | |
2019 | return TRUE; | |
2020 | } | |
2021 | ||
2022 | /* Make sure this symbol is output as a dynamic symbol. */ | |
2023 | if (h->dynindx == -1 && !h->forced_local | |
2024 | && !bfd_elf_link_record_dynamic_symbol (info, h)) | |
2025 | return FALSE; | |
2026 | ||
34e967a5 MC |
2027 | if (bfd_link_pic (info) |
2028 | || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h)) | |
886a2506 NC |
2029 | { |
2030 | bfd_vma loc = add_symbol_to_plt (info); | |
2031 | ||
08759e0f | 2032 | if (bfd_link_executable (info) && !h->def_regular) |
886a2506 | 2033 | { |
34e967a5 | 2034 | h->root.u.def.section = htab->splt; |
886a2506 NC |
2035 | h->root.u.def.value = loc; |
2036 | } | |
2037 | h->plt.offset = loc; | |
2038 | } | |
34e967a5 MC |
2039 | else |
2040 | { | |
2041 | h->plt.offset = (bfd_vma) -1; | |
2042 | h->needs_plt = 0; | |
2043 | } | |
2044 | return TRUE; | |
886a2506 | 2045 | } |
34e967a5 MC |
2046 | |
2047 | /* If this is a weak symbol, and there is a real definition, the | |
2048 | processor independent code will have arranged for us to see the | |
2049 | real definition first, and we can just use the same value. */ | |
2050 | if (h->u.weakdef != NULL) | |
886a2506 | 2051 | { |
34e967a5 MC |
2052 | BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined |
2053 | || h->u.weakdef->root.type == bfd_link_hash_defweak); | |
2054 | h->root.u.def.section = h->u.weakdef->root.u.def.section; | |
2055 | h->root.u.def.value = h->u.weakdef->root.u.def.value; | |
2056 | return TRUE; | |
886a2506 NC |
2057 | } |
2058 | ||
34e967a5 MC |
2059 | /* This is a reference to a symbol defined by a dynamic object which |
2060 | is not a function. */ | |
2061 | ||
2062 | /* If we are creating a shared library, we must presume that the | |
2063 | only references to the symbol are via the global offset table. | |
2064 | For such cases we need not do anything here; the relocations will | |
2065 | be handled correctly by relocate_section. */ | |
3c8adaca CZ |
2066 | if (!bfd_link_executable (info)) |
2067 | return TRUE; | |
2068 | ||
2069 | /* If there are no non-GOT references, we do not need a copy | |
2070 | relocation. */ | |
2071 | if (!h->non_got_ref) | |
34e967a5 MC |
2072 | return TRUE; |
2073 | ||
3c8adaca CZ |
2074 | /* If -z nocopyreloc was given, we won't generate them either. */ |
2075 | if (info->nocopyreloc) | |
2076 | { | |
2077 | h->non_got_ref = 0; | |
2078 | return TRUE; | |
2079 | } | |
2080 | ||
34e967a5 MC |
2081 | /* We must allocate the symbol in our .dynbss section, which will |
2082 | become part of the .bss section of the executable. There will be | |
2083 | an entry for this symbol in the .dynsym section. The dynamic | |
2084 | object will contain position independent code, so all references | |
2085 | from the dynamic object to this symbol will go through the global | |
2086 | offset table. The dynamic linker will use the .dynsym entry to | |
2087 | determine the address it must put in the global offset table, so | |
2088 | both the dynamic object and the regular object will refer to the | |
2089 | same memory location for the variable. */ | |
2090 | ||
3c8adaca CZ |
2091 | if (htab == NULL) |
2092 | return FALSE; | |
34e967a5 MC |
2093 | |
2094 | /* We must generate a R_ARC_COPY reloc to tell the dynamic linker to | |
2095 | copy the initial value out of the dynamic object and into the | |
2096 | runtime process image. We need to remember the offset into the | |
2097 | .rela.bss section we are going to use. */ | |
2098 | if ((h->root.u.def.section->flags & SEC_ALLOC) != 0) | |
2099 | { | |
8a36df4d | 2100 | struct elf_arc_link_hash_table *arc_htab = elf_arc_hash_table (info); |
34e967a5 | 2101 | |
8a36df4d CM |
2102 | BFD_ASSERT (arc_htab->srelbss != NULL); |
2103 | arc_htab->srelbss->size += sizeof (Elf32_External_Rela); | |
34e967a5 MC |
2104 | h->needs_copy = 1; |
2105 | } | |
2106 | ||
8a36df4d | 2107 | /* TODO: Move this also to arc_hash_table. */ |
3c8adaca CZ |
2108 | s = bfd_get_section_by_name (dynobj, ".dynbss"); |
2109 | BFD_ASSERT (s != NULL); | |
34e967a5 | 2110 | |
3c8adaca | 2111 | return _bfd_elf_adjust_dynamic_copy (info, h, s); |
886a2506 NC |
2112 | } |
2113 | ||
2114 | /* Function : elf_arc_finish_dynamic_symbol | |
2115 | Brief : Finish up dynamic symbol handling. We set the | |
34e967a5 | 2116 | contents of various dynamic sections here. |
886a2506 | 2117 | Args : output_bfd : |
34e967a5 MC |
2118 | info : |
2119 | h : | |
2120 | sym : | |
886a2506 | 2121 | Returns : True/False as the return status. */ |
34e967a5 | 2122 | |
886a2506 NC |
2123 | static bfd_boolean |
2124 | elf_arc_finish_dynamic_symbol (bfd * output_bfd, | |
2125 | struct bfd_link_info *info, | |
2126 | struct elf_link_hash_entry *h, | |
2127 | Elf_Internal_Sym * sym) | |
2128 | { | |
34e967a5 | 2129 | if (h->plt.offset != (bfd_vma) -1) |
886a2506 | 2130 | { |
34e967a5 MC |
2131 | relocate_plt_for_symbol (output_bfd, info, h); |
2132 | ||
2133 | if (!h->def_regular) | |
886a2506 | 2134 | { |
34e967a5 MC |
2135 | /* Mark the symbol as undefined, rather than as defined in |
2136 | the .plt section. Leave the value alone. */ | |
2137 | sym->st_shndx = SHN_UNDEF; | |
886a2506 | 2138 | } |
34e967a5 MC |
2139 | } |
2140 | ||
34e967a5 | 2141 | |
08759e0f CM |
2142 | /* This function traverses list of GOT entries and |
2143 | create respective dynamic relocs. */ | |
2144 | /* TODO: Make function to get list and not access the list directly. */ | |
2145 | /* TODO: Move function to relocate_section create this relocs eagerly. */ | |
2146 | create_got_dynrelocs_for_got_info (&h->got.glist, | |
2147 | output_bfd, | |
2148 | info, | |
2149 | h); | |
34e967a5 MC |
2150 | |
2151 | if (h->needs_copy) | |
2152 | { | |
8a36df4d CM |
2153 | struct elf_arc_link_hash_table *arc_htab = elf_arc_hash_table (info); |
2154 | ||
2155 | if (h->dynindx == -1 | |
2156 | || (h->root.type != bfd_link_hash_defined | |
2157 | && h->root.type != bfd_link_hash_defweak) | |
2158 | || arc_htab->srelbss == NULL) | |
2159 | abort (); | |
2160 | ||
34e967a5 MC |
2161 | bfd_vma rel_offset = (h->root.u.def.value |
2162 | + h->root.u.def.section->output_section->vma | |
2163 | + h->root.u.def.section->output_offset); | |
2164 | ||
8a36df4d CM |
2165 | bfd_byte * loc = arc_htab->srelbss->contents |
2166 | + (arc_htab->srelbss->reloc_count * sizeof (Elf32_External_Rela)); | |
2167 | arc_htab->srelbss->reloc_count++; | |
34e967a5 MC |
2168 | |
2169 | Elf_Internal_Rela rel; | |
2170 | rel.r_addend = 0; | |
2171 | rel.r_offset = rel_offset; | |
94e5c971 CZ |
2172 | |
2173 | BFD_ASSERT (h->dynindx != -1); | |
34e967a5 MC |
2174 | rel.r_info = ELF32_R_INFO (h->dynindx, R_ARC_COPY); |
2175 | ||
23a42089 | 2176 | bfd_elf32_swap_reloca_out (output_bfd, &rel, loc); |
886a2506 NC |
2177 | } |
2178 | ||
2179 | /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */ | |
2180 | if (strcmp (h->root.root.string, "_DYNAMIC") == 0 | |
2181 | || strcmp (h->root.root.string, "__DYNAMIC") == 0 | |
2182 | || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0) | |
2183 | sym->st_shndx = SHN_ABS; | |
2184 | ||
2185 | return TRUE; | |
2186 | } | |
2187 | ||
4ade44b7 | 2188 | #define GET_SYMBOL_OR_SECTION(TAG, SYMBOL, SECTION) \ |
34e967a5 MC |
2189 | case TAG: \ |
2190 | if (SYMBOL != NULL) \ | |
4ade44b7 AM |
2191 | h = elf_link_hash_lookup (elf_hash_table (info), \ |
2192 | SYMBOL, FALSE, FALSE, TRUE); \ | |
34e967a5 | 2193 | else if (SECTION != NULL) \ |
4ade44b7 | 2194 | s = bfd_get_linker_section (dynobj, SECTION); \ |
34e967a5 | 2195 | break; |
886a2506 NC |
2196 | |
2197 | /* Function : elf_arc_finish_dynamic_sections | |
2198 | Brief : Finish up the dynamic sections handling. | |
2199 | Args : output_bfd : | |
34e967a5 MC |
2200 | info : |
2201 | h : | |
2202 | sym : | |
886a2506 | 2203 | Returns : True/False as the return status. */ |
34e967a5 | 2204 | |
886a2506 | 2205 | static bfd_boolean |
34e967a5 MC |
2206 | elf_arc_finish_dynamic_sections (bfd * output_bfd, |
2207 | struct bfd_link_info *info) | |
886a2506 NC |
2208 | { |
2209 | struct dynamic_sections ds = arc_create_dynamic_sections (output_bfd, info); | |
34e967a5 | 2210 | struct elf_link_hash_table *htab = elf_hash_table (info); |
886a2506 NC |
2211 | bfd *dynobj = (elf_hash_table (info))->dynobj; |
2212 | ||
2213 | if (ds.sdyn) | |
2214 | { | |
2215 | Elf32_External_Dyn *dyncon, *dynconend; | |
2216 | ||
2217 | dyncon = (Elf32_External_Dyn *) ds.sdyn->contents; | |
08759e0f CM |
2218 | dynconend |
2219 | = (Elf32_External_Dyn *) (ds.sdyn->contents + ds.sdyn->size); | |
886a2506 NC |
2220 | for (; dyncon < dynconend; dyncon++) |
2221 | { | |
2222 | Elf_Internal_Dyn internal_dyn; | |
2223 | bfd_boolean do_it = FALSE; | |
2224 | ||
2225 | struct elf_link_hash_entry *h = NULL; | |
2226 | asection *s = NULL; | |
2227 | ||
2228 | bfd_elf32_swap_dyn_in (dynobj, dyncon, &internal_dyn); | |
2229 | ||
2230 | switch (internal_dyn.d_tag) | |
2231 | { | |
65b94e90 CM |
2232 | GET_SYMBOL_OR_SECTION (DT_INIT, info->init_function, NULL) |
2233 | GET_SYMBOL_OR_SECTION (DT_FINI, info->fini_function, NULL) | |
4ade44b7 AM |
2234 | GET_SYMBOL_OR_SECTION (DT_PLTGOT, NULL, ".plt") |
2235 | GET_SYMBOL_OR_SECTION (DT_JMPREL, NULL, ".rela.plt") | |
2236 | GET_SYMBOL_OR_SECTION (DT_PLTRELSZ, NULL, ".rela.plt") | |
2237 | GET_SYMBOL_OR_SECTION (DT_RELASZ, NULL, ".rela.plt") | |
2238 | GET_SYMBOL_OR_SECTION (DT_VERSYM, NULL, ".gnu.version") | |
2239 | GET_SYMBOL_OR_SECTION (DT_VERDEF, NULL, ".gnu.version_d") | |
2240 | GET_SYMBOL_OR_SECTION (DT_VERNEED, NULL, ".gnu.version_r") | |
886a2506 NC |
2241 | default: |
2242 | break; | |
2243 | } | |
2244 | ||
34e967a5 | 2245 | /* In case the dynamic symbols should be updated with a symbol. */ |
886a2506 NC |
2246 | if (h != NULL |
2247 | && (h->root.type == bfd_link_hash_defined | |
34e967a5 | 2248 | || h->root.type == bfd_link_hash_defweak)) |
886a2506 NC |
2249 | { |
2250 | asection *asec_ptr; | |
2251 | ||
2252 | internal_dyn.d_un.d_val = h->root.u.def.value; | |
2253 | asec_ptr = h->root.u.def.section; | |
2254 | if (asec_ptr->output_section != NULL) | |
2255 | { | |
2256 | internal_dyn.d_un.d_val += | |
08759e0f CM |
2257 | (asec_ptr->output_section->vma |
2258 | + asec_ptr->output_offset); | |
886a2506 NC |
2259 | } |
2260 | else | |
2261 | { | |
34e967a5 MC |
2262 | /* The symbol is imported from another shared |
2263 | library and does not apply to this one. */ | |
886a2506 NC |
2264 | internal_dyn.d_un.d_val = 0; |
2265 | } | |
2266 | do_it = TRUE; | |
2267 | } | |
2268 | else if (s != NULL) /* With a section information. */ | |
2269 | { | |
2270 | switch (internal_dyn.d_tag) | |
2271 | { | |
2272 | case DT_PLTGOT: | |
2273 | case DT_JMPREL: | |
34e967a5 MC |
2274 | case DT_VERSYM: |
2275 | case DT_VERDEF: | |
2276 | case DT_VERNEED: | |
4ade44b7 AM |
2277 | internal_dyn.d_un.d_ptr = (s->output_section->vma |
2278 | + s->output_offset); | |
886a2506 NC |
2279 | do_it = TRUE; |
2280 | break; | |
2281 | ||
2282 | case DT_PLTRELSZ: | |
2283 | internal_dyn.d_un.d_val = s->size; | |
2284 | do_it = TRUE; | |
2285 | break; | |
2286 | ||
2287 | case DT_RELASZ: | |
34e967a5 MC |
2288 | if (s != NULL) |
2289 | internal_dyn.d_un.d_val -= s->size; | |
886a2506 NC |
2290 | do_it = TRUE; |
2291 | break; | |
2292 | ||
2293 | default: | |
2294 | break; | |
2295 | } | |
2296 | } | |
2297 | ||
4ade44b7 | 2298 | if (do_it) |
886a2506 NC |
2299 | bfd_elf32_swap_dyn_out (output_bfd, &internal_dyn, dyncon); |
2300 | } | |
2301 | ||
34e967a5 | 2302 | if (htab->splt->size > 0) |
886a2506 | 2303 | { |
34e967a5 | 2304 | relocate_plt_for_entry (output_bfd, info); |
886a2506 NC |
2305 | } |
2306 | ||
34e967a5 MC |
2307 | /* TODO: Validate this. */ |
2308 | elf_section_data (htab->srelplt->output_section)->this_hdr.sh_entsize | |
2309 | = 0xc; | |
886a2506 NC |
2310 | } |
2311 | ||
2312 | /* Fill in the first three entries in the global offset table. */ | |
34e967a5 | 2313 | if (htab->sgot) |
886a2506 | 2314 | { |
3b63d2ce CM |
2315 | struct elf_link_hash_entry *h; |
2316 | h = elf_link_hash_lookup (elf_hash_table (info), "_GLOBAL_OFFSET_TABLE_", | |
2317 | FALSE, FALSE, TRUE); | |
2318 | ||
2319 | if (h != NULL && h->root.type != bfd_link_hash_undefined | |
2320 | && h->root.u.def.section != NULL) | |
886a2506 | 2321 | { |
3b63d2ce CM |
2322 | asection *sec = h->root.u.def.section; |
2323 | ||
886a2506 NC |
2324 | if (ds.sdyn == NULL) |
2325 | bfd_put_32 (output_bfd, (bfd_vma) 0, | |
3b63d2ce | 2326 | sec->contents); |
886a2506 NC |
2327 | else |
2328 | bfd_put_32 (output_bfd, | |
2329 | ds.sdyn->output_section->vma + ds.sdyn->output_offset, | |
3b63d2ce CM |
2330 | sec->contents); |
2331 | bfd_put_32 (output_bfd, (bfd_vma) 0, sec->contents + 4); | |
2332 | bfd_put_32 (output_bfd, (bfd_vma) 0, sec->contents + 8); | |
886a2506 NC |
2333 | } |
2334 | } | |
2335 | ||
886a2506 NC |
2336 | return TRUE; |
2337 | } | |
2338 | ||
34e967a5 MC |
2339 | #define ADD_DYNAMIC_SYMBOL(NAME, TAG) \ |
2340 | h = elf_link_hash_lookup (elf_hash_table (info), \ | |
2341 | NAME, FALSE, FALSE, FALSE); \ | |
2342 | if ((h != NULL && (h->ref_regular || h->def_regular))) \ | |
2343 | if (! _bfd_elf_add_dynamic_entry (info, TAG, 0)) \ | |
886a2506 NC |
2344 | return FALSE; |
2345 | ||
2346 | /* Set the sizes of the dynamic sections. */ | |
2347 | static bfd_boolean | |
34e967a5 MC |
2348 | elf_arc_size_dynamic_sections (bfd * output_bfd, |
2349 | struct bfd_link_info *info) | |
886a2506 | 2350 | { |
34e967a5 | 2351 | bfd * dynobj; |
886a2506 | 2352 | asection * s; |
34e967a5 MC |
2353 | bfd_boolean relocs_exist = FALSE; |
2354 | bfd_boolean reltext_exist = FALSE; | |
886a2506 | 2355 | struct dynamic_sections ds = arc_create_dynamic_sections (output_bfd, info); |
34e967a5 | 2356 | struct elf_link_hash_table *htab = elf_hash_table (info); |
886a2506 NC |
2357 | |
2358 | dynobj = (elf_hash_table (info))->dynobj; | |
2359 | BFD_ASSERT (dynobj != NULL); | |
2360 | ||
2361 | if ((elf_hash_table (info))->dynamic_sections_created) | |
2362 | { | |
2363 | struct elf_link_hash_entry *h; | |
2364 | ||
34e967a5 MC |
2365 | /* Set the contents of the .interp section to the |
2366 | interpreter. */ | |
886a2506 NC |
2367 | if (!bfd_link_pic (info)) |
2368 | { | |
2369 | s = bfd_get_section_by_name (dynobj, ".interp"); | |
2370 | BFD_ASSERT (s != NULL); | |
34e967a5 | 2371 | s->size = sizeof (ELF_DYNAMIC_INTERPRETER); |
886a2506 NC |
2372 | s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER; |
2373 | } | |
2374 | ||
34e967a5 MC |
2375 | /* Add some entries to the .dynamic section. We fill in some of |
2376 | the values later, in elf_bfd_final_link, but we must add the | |
2377 | entries now so that we know the final size of the .dynamic | |
2378 | section. Checking if the .init section is present. We also | |
2379 | create DT_INIT and DT_FINI entries if the init_str has been | |
2380 | changed by the user. */ | |
65b94e90 CM |
2381 | ADD_DYNAMIC_SYMBOL (info->init_function, DT_INIT); |
2382 | ADD_DYNAMIC_SYMBOL (info->fini_function, DT_FINI); | |
886a2506 NC |
2383 | } |
2384 | else | |
2385 | { | |
34e967a5 MC |
2386 | /* We may have created entries in the .rela.got section. |
2387 | However, if we are not creating the dynamic sections, we will | |
2388 | not actually use these entries. Reset the size of .rela.got, | |
2389 | which will cause it to get stripped from the output file | |
2390 | below. */ | |
2391 | if (htab->srelgot != NULL) | |
2392 | htab->srelgot->size = 0; | |
886a2506 NC |
2393 | } |
2394 | ||
34e967a5 MC |
2395 | if (htab->splt != NULL && htab->splt->size == 0) |
2396 | htab->splt->flags |= SEC_EXCLUDE; | |
886a2506 NC |
2397 | for (s = dynobj->sections; s != NULL; s = s->next) |
2398 | { | |
34e967a5 | 2399 | if ((s->flags & SEC_LINKER_CREATED) == 0) |
886a2506 NC |
2400 | continue; |
2401 | ||
34e967a5 | 2402 | if (strncmp (s->name, ".rela", 5) == 0) |
886a2506 | 2403 | { |
34e967a5 MC |
2404 | if (s->size == 0) |
2405 | { | |
2406 | s->flags |= SEC_EXCLUDE; | |
2407 | } | |
2408 | else | |
2409 | { | |
2410 | if (strcmp (s->name, ".rela.plt") != 0) | |
2411 | { | |
2412 | const char *outname = | |
2413 | bfd_get_section_name (output_bfd, | |
2414 | htab->srelplt->output_section); | |
2415 | ||
2416 | asection *target = bfd_get_section_by_name (output_bfd, | |
2417 | outname + 4); | |
2418 | ||
2419 | relocs_exist = TRUE; | |
2420 | if (target != NULL && target->size != 0 | |
2421 | && (target->flags & SEC_READONLY) != 0 | |
2422 | && (target->flags & SEC_ALLOC) != 0) | |
2423 | reltext_exist = TRUE; | |
2424 | } | |
2425 | } | |
886a2506 | 2426 | |
34e967a5 MC |
2427 | /* We use the reloc_count field as a counter if we need to |
2428 | copy relocs into the output file. */ | |
2429 | s->reloc_count = 0; | |
886a2506 | 2430 | } |
34e967a5 MC |
2431 | |
2432 | if (strcmp (s->name, ".dynamic") == 0) | |
2433 | continue; | |
2434 | ||
2435 | if (s->size != 0) | |
2436 | s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size); | |
2437 | ||
2438 | if (s->contents == NULL && s->size != 0) | |
2439 | return FALSE; | |
886a2506 NC |
2440 | } |
2441 | ||
2442 | if (ds.sdyn) | |
2443 | { | |
34e967a5 MC |
2444 | /* TODO: Check if this is needed. */ |
2445 | if (!bfd_link_pic (info)) | |
2446 | if (!_bfd_elf_add_dynamic_entry (info, DT_DEBUG, 0)) | |
2447 | return FALSE; | |
2448 | ||
2449 | if (htab->splt && (htab->splt->flags & SEC_EXCLUDE) == 0) | |
886a2506 NC |
2450 | if (!_bfd_elf_add_dynamic_entry (info, DT_PLTGOT, 0) |
2451 | || !_bfd_elf_add_dynamic_entry (info, DT_PLTRELSZ, 0) | |
2452 | || !_bfd_elf_add_dynamic_entry (info, DT_PLTREL, DT_RELA) | |
2453 | || !_bfd_elf_add_dynamic_entry (info, DT_JMPREL, 0) | |
2454 | ) | |
2455 | return FALSE; | |
2456 | ||
2457 | if (relocs_exist == TRUE) | |
2458 | if (!_bfd_elf_add_dynamic_entry (info, DT_RELA, 0) | |
2459 | || !_bfd_elf_add_dynamic_entry (info, DT_RELASZ, 0) | |
2ab2f40d | 2460 | || !_bfd_elf_add_dynamic_entry (info, DT_RELAENT, |
886a2506 NC |
2461 | sizeof (Elf32_External_Rela)) |
2462 | ) | |
2463 | return FALSE; | |
2464 | ||
2465 | if (reltext_exist == TRUE) | |
2466 | if (!_bfd_elf_add_dynamic_entry (info, DT_TEXTREL, 0)) | |
2467 | return FALSE; | |
2468 | } | |
2469 | ||
2470 | return TRUE; | |
2471 | } | |
2472 | ||
0f7f3789 CM |
2473 | |
2474 | /* Classify dynamic relocs such that -z combreloc can reorder and combine | |
2475 | them. */ | |
2476 | static enum elf_reloc_type_class | |
2477 | elf32_arc_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED, | |
2478 | const asection *rel_sec ATTRIBUTE_UNUSED, | |
2479 | const Elf_Internal_Rela *rela) | |
2480 | { | |
2481 | switch ((int) ELF32_R_TYPE (rela->r_info)) | |
2482 | { | |
2483 | case R_ARC_RELATIVE: | |
2484 | return reloc_class_relative; | |
2485 | case R_ARC_JMP_SLOT: | |
2486 | return reloc_class_plt; | |
2487 | case R_ARC_COPY: | |
2488 | return reloc_class_copy; | |
2489 | /* TODO: Needed in future to support ifunc. */ | |
2490 | /* | |
2491 | case R_ARC_IRELATIVE: | |
2492 | return reloc_class_ifunc; | |
2493 | */ | |
2494 | default: | |
2495 | return reloc_class_normal; | |
2496 | } | |
2497 | } | |
2498 | ||
34e967a5 MC |
2499 | const struct elf_size_info arc_elf32_size_info = |
2500 | { | |
2501 | sizeof (Elf32_External_Ehdr), | |
2502 | sizeof (Elf32_External_Phdr), | |
2503 | sizeof (Elf32_External_Shdr), | |
2504 | sizeof (Elf32_External_Rel), | |
2505 | sizeof (Elf32_External_Rela), | |
2506 | sizeof (Elf32_External_Sym), | |
2507 | sizeof (Elf32_External_Dyn), | |
2508 | sizeof (Elf_External_Note), | |
2509 | 4, | |
2510 | 1, | |
2511 | 32, 2, | |
2512 | ELFCLASS32, EV_CURRENT, | |
2513 | bfd_elf32_write_out_phdrs, | |
2514 | bfd_elf32_write_shdrs_and_ehdr, | |
2515 | bfd_elf32_checksum_contents, | |
2516 | bfd_elf32_write_relocs, | |
2517 | bfd_elf32_swap_symbol_in, | |
2518 | bfd_elf32_swap_symbol_out, | |
2519 | bfd_elf32_slurp_reloc_table, | |
2520 | bfd_elf32_slurp_symbol_table, | |
2521 | bfd_elf32_swap_dyn_in, | |
2522 | bfd_elf32_swap_dyn_out, | |
2523 | bfd_elf32_swap_reloc_in, | |
2524 | bfd_elf32_swap_reloc_out, | |
2525 | bfd_elf32_swap_reloca_in, | |
2526 | bfd_elf32_swap_reloca_out | |
2527 | }; | |
2528 | ||
2529 | #define elf_backend_size_info arc_elf32_size_info | |
2530 | ||
34e967a5 MC |
2531 | /* Hook called by the linker routine which adds symbols from an object |
2532 | file. */ | |
2533 | ||
2534 | static bfd_boolean | |
2535 | elf_arc_add_symbol_hook (bfd * abfd, | |
2536 | struct bfd_link_info * info, | |
2537 | Elf_Internal_Sym * sym, | |
2538 | const char ** namep ATTRIBUTE_UNUSED, | |
2539 | flagword * flagsp ATTRIBUTE_UNUSED, | |
2540 | asection ** secp ATTRIBUTE_UNUSED, | |
2541 | bfd_vma * valp ATTRIBUTE_UNUSED) | |
2542 | { | |
a43942db | 2543 | if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC |
34e967a5 MC |
2544 | && (abfd->flags & DYNAMIC) == 0 |
2545 | && bfd_get_flavour (info->output_bfd) == bfd_target_elf_flavour) | |
a43942db | 2546 | elf_tdata (info->output_bfd)->has_gnu_symbols |= elf_gnu_symbol_ifunc; |
34e967a5 MC |
2547 | |
2548 | return TRUE; | |
2549 | } | |
886a2506 | 2550 | |
47f7f636 AK |
2551 | /* GDB expects general purpose registers to be in section .reg. However Linux |
2552 | kernel doesn't create this section and instead writes registers to NOTE | |
2553 | section. It is up to the binutils to create a pseudo-section .reg from the | |
2554 | contents of NOTE. Also BFD will read pid and signal number from NOTE. This | |
2555 | function relies on offsets inside elf_prstatus structure in Linux to be | |
2556 | stable. */ | |
2557 | ||
2558 | static bfd_boolean | |
2559 | elf32_arc_grok_prstatus (bfd *abfd, Elf_Internal_Note *note) | |
2560 | { | |
2561 | int offset; | |
2562 | size_t size; | |
2563 | ||
2564 | switch (note->descsz) | |
2565 | { | |
2566 | default: | |
2567 | return FALSE; | |
2568 | ||
2569 | case 236: /* sizeof (struct elf_prstatus) on Linux/arc. */ | |
2570 | /* pr_cursig */ | |
2571 | elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12); | |
2572 | /* pr_pid */ | |
2573 | elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 24); | |
2574 | /* pr_regs */ | |
2575 | offset = 72; | |
2576 | size = (40 * 4); /* There are 40 registers in user_regs_struct. */ | |
2577 | break; | |
2578 | } | |
2579 | /* Make a ".reg/999" section. */ | |
2580 | return _bfd_elfcore_make_pseudosection (abfd, ".reg", size, | |
2581 | note->descpos + offset); | |
2582 | } | |
2583 | ||
6d00b590 | 2584 | #define TARGET_LITTLE_SYM arc_elf32_le_vec |
47b0e7ad | 2585 | #define TARGET_LITTLE_NAME "elf32-littlearc" |
886a2506 NC |
2586 | #define TARGET_BIG_SYM arc_elf32_be_vec |
2587 | #define TARGET_BIG_NAME "elf32-bigarc" | |
2588 | #define ELF_ARCH bfd_arch_arc | |
8a36df4d | 2589 | #define ELF_TARGET_ID ARC_ELF_DATA |
886a2506 NC |
2590 | #define ELF_MACHINE_CODE EM_ARC_COMPACT |
2591 | #define ELF_MACHINE_ALT1 EM_ARC_COMPACT2 | |
2592 | #define ELF_MAXPAGESIZE 0x2000 | |
2593 | ||
34e967a5 MC |
2594 | #define bfd_elf32_bfd_link_hash_table_create arc_elf_link_hash_table_create |
2595 | ||
2596 | #define bfd_elf32_bfd_merge_private_bfd_data arc_elf_merge_private_bfd_data | |
2597 | #define bfd_elf32_bfd_reloc_type_lookup arc_elf32_bfd_reloc_type_lookup | |
2598 | #define bfd_elf32_bfd_set_private_flags arc_elf_set_private_flags | |
2599 | #define bfd_elf32_bfd_print_private_bfd_data arc_elf_print_private_bfd_data | |
2600 | #define bfd_elf32_bfd_copy_private_bfd_data arc_elf_copy_private_bfd_data | |
2601 | ||
886a2506 NC |
2602 | #define elf_info_to_howto_rel arc_info_to_howto_rel |
2603 | #define elf_backend_object_p arc_elf_object_p | |
2604 | #define elf_backend_final_write_processing arc_elf_final_write_processing | |
2605 | ||
2606 | #define elf_backend_relocate_section elf_arc_relocate_section | |
2607 | #define elf_backend_check_relocs elf_arc_check_relocs | |
8a36df4d | 2608 | #define elf_backend_create_dynamic_sections arc_elf_create_dynamic_sections |
886a2506 | 2609 | |
0f7f3789 CM |
2610 | #define elf_backend_reloc_type_class elf32_arc_reloc_type_class |
2611 | ||
886a2506 NC |
2612 | #define elf_backend_adjust_dynamic_symbol elf_arc_adjust_dynamic_symbol |
2613 | #define elf_backend_finish_dynamic_symbol elf_arc_finish_dynamic_symbol | |
2614 | ||
2615 | #define elf_backend_finish_dynamic_sections elf_arc_finish_dynamic_sections | |
2616 | #define elf_backend_size_dynamic_sections elf_arc_size_dynamic_sections | |
08759e0f | 2617 | #define elf_backend_add_symbol_hook elf_arc_add_symbol_hook |
886a2506 NC |
2618 | |
2619 | #define elf_backend_can_gc_sections 1 | |
2620 | #define elf_backend_want_got_plt 1 | |
2621 | #define elf_backend_plt_readonly 1 | |
34e967a5 | 2622 | #define elf_backend_rela_plts_and_copies_p 1 |
886a2506 NC |
2623 | #define elf_backend_want_plt_sym 0 |
2624 | #define elf_backend_got_header_size 12 | |
2625 | ||
2626 | #define elf_backend_may_use_rel_p 0 | |
2627 | #define elf_backend_may_use_rela_p 1 | |
2628 | #define elf_backend_default_use_rela_p 1 | |
252b5132 | 2629 | |
47f7f636 AK |
2630 | #define elf_backend_grok_prstatus elf32_arc_grok_prstatus |
2631 | ||
3c8adaca CZ |
2632 | #define elf_backend_default_execstack 0 |
2633 | ||
252b5132 | 2634 | #include "elf32-target.h" |