Commit | Line | Data |
---|---|---|
252b5132 | 1 | /* ARC-specific support for 32-bit ELF |
2571583a | 2 | Copyright (C) 1994-2017 Free Software Foundation, Inc. |
886a2506 | 3 | Contributed by Cupertino Miranda (cmiranda@synopsys.com). |
252b5132 | 4 | |
0d2bcfaf | 5 | This file is part of BFD, the Binary File Descriptor library. |
252b5132 | 6 | |
0d2bcfaf NC |
7 | This program is free software; you can redistribute it and/or modify |
8 | it under the terms of the GNU General Public License as published by | |
cd123cb7 | 9 | the Free Software Foundation; either version 3 of the License, or |
0d2bcfaf | 10 | (at your option) any later version. |
252b5132 | 11 | |
0d2bcfaf NC |
12 | This program is distributed in the hope that it will be useful, |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
252b5132 | 16 | |
0d2bcfaf NC |
17 | You should have received a copy of the GNU General Public License |
18 | along with this program; if not, write to the Free Software | |
47b0e7ad NC |
19 | Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, |
20 | MA 02110-1301, USA. */ | |
252b5132 | 21 | |
252b5132 | 22 | #include "sysdep.h" |
3db64b00 | 23 | #include "bfd.h" |
252b5132 RH |
24 | #include "libbfd.h" |
25 | #include "elf-bfd.h" | |
26 | #include "elf/arc.h" | |
ea04a8f6 | 27 | #include "libiberty.h" |
886a2506 | 28 | #include "opcode/arc-func.h" |
4b0c052e | 29 | #include "opcode/arc.h" |
34e967a5 | 30 | #include "arc-plt.h" |
886a2506 | 31 | |
08759e0f | 32 | /* #define ARC_ENABLE_DEBUG 1 */ |
f7e8b360 NC |
33 | #ifdef ARC_ENABLE_DEBUG |
34 | static const char * | |
34e967a5 MC |
35 | name_for_global_symbol (struct elf_link_hash_entry *h) |
36 | { | |
37 | static char *local_str = "(local)"; | |
38 | if (h == NULL) | |
39 | return local_str; | |
f7e8b360 | 40 | return h->root.root.string; |
34e967a5 | 41 | } |
f7e8b360 NC |
42 | #define ARC_DEBUG(fmt, args...) fprintf (stderr, fmt, ##args) |
43 | #else | |
44 | #define ARC_DEBUG(...) | |
34e967a5 MC |
45 | #endif |
46 | ||
47 | ||
48 | #define ADD_RELA(BFD, SECTION, OFFSET, SYM_IDX, TYPE, ADDEND) \ | |
49 | { \ | |
50 | struct elf_link_hash_table *_htab = elf_hash_table (info); \ | |
51 | Elf_Internal_Rela _rel; \ | |
23a42089 | 52 | bfd_byte * _loc; \ |
34e967a5 | 53 | \ |
08759e0f | 54 | BFD_ASSERT (_htab->srel##SECTION &&_htab->srel##SECTION->contents); \ |
23a42089 | 55 | _loc = _htab->srel##SECTION->contents \ |
34e967a5 MC |
56 | + ((_htab->srel##SECTION->reloc_count) \ |
57 | * sizeof (Elf32_External_Rela)); \ | |
58 | _htab->srel##SECTION->reloc_count++; \ | |
59 | _rel.r_addend = ADDEND; \ | |
60 | _rel.r_offset = (_htab->s##SECTION)->output_section->vma \ | |
61 | + (_htab->s##SECTION)->output_offset + OFFSET; \ | |
94e5c971 | 62 | BFD_ASSERT ((long) SYM_IDX != -1); \ |
34e967a5 | 63 | _rel.r_info = ELF32_R_INFO (SYM_IDX, TYPE); \ |
23a42089 | 64 | bfd_elf32_swap_reloca_out (BFD, &_rel, _loc); \ |
34e967a5 | 65 | } |
886a2506 | 66 | |
34e967a5 | 67 | |
886a2506 NC |
68 | /* The default symbols representing the init and fini dyn values. |
69 | TODO: Check what is the relation of those strings with arclinux.em | |
70 | and DT_INIT. */ | |
71 | #define INIT_SYM_STRING "_init" | |
72 | #define FINI_SYM_STRING "_fini" | |
73 | ||
74 | char * init_str = INIT_SYM_STRING; | |
75 | char * fini_str = FINI_SYM_STRING; | |
76 | ||
886a2506 NC |
77 | #define ARC_RELOC_HOWTO(TYPE, VALUE, SIZE, BITSIZE, RELOC_FUNCTION, OVERFLOW, FORMULA) \ |
78 | case VALUE: \ | |
b05a65d0 | 79 | return "R_" #TYPE; \ |
886a2506 NC |
80 | break; |
81 | ||
82 | static ATTRIBUTE_UNUSED const char * | |
83 | reloc_type_to_name (unsigned int type) | |
84 | { | |
85 | switch (type) | |
86 | { | |
87 | #include "elf/arc-reloc.def" | |
88 | ||
89 | default: | |
90 | return "UNKNOWN"; | |
91 | break; | |
92 | } | |
93 | } | |
94 | #undef ARC_RELOC_HOWTO | |
252b5132 | 95 | |
252b5132 RH |
96 | /* Try to minimize the amount of space occupied by relocation tables |
97 | on the ROM (not that the ROM won't be swamped by other ELF overhead). */ | |
0d2bcfaf | 98 | |
886a2506 NC |
99 | #define USE_REL 1 |
100 | ||
101 | static ATTRIBUTE_UNUSED bfd_boolean | |
102 | is_reloc_PC_relative (reloc_howto_type *howto) | |
103 | { | |
104 | return (strstr (howto->name, "PC") != NULL) ? TRUE : FALSE; | |
105 | } | |
106 | ||
107 | static bfd_boolean | |
108 | is_reloc_SDA_relative (reloc_howto_type *howto) | |
109 | { | |
110 | return (strstr (howto->name, "SDA") != NULL) ? TRUE : FALSE; | |
111 | } | |
112 | ||
113 | static bfd_boolean | |
114 | is_reloc_for_GOT (reloc_howto_type * howto) | |
115 | { | |
34e967a5 MC |
116 | if (strstr (howto->name, "TLS") != NULL) |
117 | return FALSE; | |
886a2506 NC |
118 | return (strstr (howto->name, "GOT") != NULL) ? TRUE : FALSE; |
119 | } | |
120 | ||
121 | static bfd_boolean | |
122 | is_reloc_for_PLT (reloc_howto_type * howto) | |
123 | { | |
124 | return (strstr (howto->name, "PLT") != NULL) ? TRUE : FALSE; | |
125 | } | |
126 | ||
34e967a5 MC |
127 | static bfd_boolean |
128 | is_reloc_for_TLS (reloc_howto_type *howto) | |
129 | { | |
130 | return (strstr (howto->name, "TLS") != NULL) ? TRUE : FALSE; | |
131 | } | |
132 | ||
08759e0f CM |
133 | struct arc_relocation_data |
134 | { | |
135 | bfd_signed_vma reloc_offset; | |
136 | bfd_signed_vma reloc_addend; | |
137 | bfd_signed_vma got_offset_value; | |
138 | ||
139 | bfd_signed_vma sym_value; | |
140 | asection * sym_section; | |
141 | ||
142 | reloc_howto_type *howto; | |
143 | ||
144 | asection * input_section; | |
145 | ||
146 | bfd_signed_vma sdata_begin_symbol_vma; | |
147 | bfd_boolean sdata_begin_symbol_vma_set; | |
148 | bfd_signed_vma got_symbol_vma; | |
149 | ||
150 | bfd_boolean should_relocate; | |
151 | ||
152 | const char * symbol_name; | |
153 | }; | |
154 | ||
155 | /* Should be included at this location due to static declarations | |
156 | * defined before this point. */ | |
157 | #include "arc-got.h" | |
158 | ||
886a2506 NC |
159 | #define arc_bfd_get_8(A,B,C) bfd_get_8(A,B) |
160 | #define arc_bfd_get_16(A,B,C) bfd_get_16(A,B) | |
72f3b6aa | 161 | #define arc_bfd_get_32(A,B,C) bfd_get_32(A,B) |
886a2506 NC |
162 | #define arc_bfd_put_8(A,B,C,D) bfd_put_8(A,B,C) |
163 | #define arc_bfd_put_16(A,B,C,D) bfd_put_16(A,B,C) | |
72f3b6aa | 164 | #define arc_bfd_put_32(A,B,C,D) bfd_put_32(A,B,C) |
886a2506 | 165 | |
252b5132 | 166 | |
47b0e7ad | 167 | static bfd_reloc_status_type |
886a2506 NC |
168 | arc_elf_reloc (bfd *abfd ATTRIBUTE_UNUSED, |
169 | arelent *reloc_entry, | |
170 | asymbol *symbol_in, | |
171 | void *data ATTRIBUTE_UNUSED, | |
172 | asection *input_section, | |
173 | bfd *output_bfd, | |
174 | char ** error_message ATTRIBUTE_UNUSED) | |
175 | { | |
176 | if (output_bfd != NULL) | |
177 | { | |
178 | reloc_entry->address += input_section->output_offset; | |
179 | ||
180 | /* In case of relocateable link and if the reloc is against a | |
181 | section symbol, the addend needs to be adjusted according to | |
182 | where the section symbol winds up in the output section. */ | |
183 | if ((symbol_in->flags & BSF_SECTION_SYM) && symbol_in->section) | |
184 | reloc_entry->addend += symbol_in->section->output_offset; | |
185 | ||
186 | return bfd_reloc_ok; | |
187 | } | |
188 | ||
189 | return bfd_reloc_continue; | |
190 | } | |
191 | ||
192 | ||
193 | #define ARC_RELOC_HOWTO(TYPE, VALUE, SIZE, BITSIZE, RELOC_FUNCTION, OVERFLOW, FORMULA) \ | |
194 | TYPE = VALUE, | |
195 | enum howto_list | |
196 | { | |
197 | #include "elf/arc-reloc.def" | |
198 | HOWTO_LIST_LAST | |
199 | }; | |
200 | #undef ARC_RELOC_HOWTO | |
201 | ||
202 | #define ARC_RELOC_HOWTO(TYPE, VALUE, RSIZE, BITSIZE, RELOC_FUNCTION, OVERFLOW, FORMULA) \ | |
f7e8b360 NC |
203 | [TYPE] = HOWTO (R_##TYPE, 0, RSIZE, BITSIZE, FALSE, 0, \ |
204 | complain_overflow_##OVERFLOW, arc_elf_reloc, \ | |
205 | "R_" #TYPE, FALSE, 0, 0, FALSE), | |
886a2506 NC |
206 | |
207 | static struct reloc_howto_struct elf_arc_howto_table[] = | |
208 | { | |
209 | #include "elf/arc-reloc.def" | |
34e967a5 MC |
210 | /* Example of what is generated by the preprocessor. Currently kept as an |
211 | example. | |
886a2506 NC |
212 | HOWTO (R_ARC_NONE, // Type. |
213 | 0, // Rightshift. | |
214 | 2, // Size (0 = byte, 1 = short, 2 = long). | |
215 | 32, // Bitsize. | |
216 | FALSE, // PC_relative. | |
217 | 0, // Bitpos. | |
218 | complain_overflow_bitfield, // Complain_on_overflow. | |
219 | bfd_elf_generic_reloc, // Special_function. | |
220 | "R_ARC_NONE", // Name. | |
221 | TRUE, // Partial_inplace. | |
222 | 0, // Src_mask. | |
223 | 0, // Dst_mask. | |
224 | FALSE), // PCrel_offset. | |
225 | */ | |
226 | }; | |
227 | #undef ARC_RELOC_HOWTO | |
228 | ||
229 | static void arc_elf_howto_init (void) | |
230 | { | |
231 | #define ARC_RELOC_HOWTO(TYPE, VALUE, SIZE, BITSIZE, RELOC_FUNCTION, OVERFLOW, FORMULA) \ | |
6f4b1afc | 232 | elf_arc_howto_table[TYPE].pc_relative = \ |
0a5ff21b | 233 | (strstr (#FORMULA, " P ") != NULL || strstr (#FORMULA, " PDATA ") != NULL); \ |
72f3b6aa CZ |
234 | elf_arc_howto_table[TYPE].dst_mask = RELOC_FUNCTION(0, ~0); \ |
235 | /* Only 32 bit data relocations should be marked as ME. */ \ | |
236 | if (strstr (#FORMULA, " ME ") != NULL) \ | |
237 | { \ | |
238 | BFD_ASSERT (SIZE == 2); \ | |
239 | } | |
886a2506 | 240 | |
34e967a5 | 241 | #include "elf/arc-reloc.def" |
72f3b6aa | 242 | |
47b0e7ad | 243 | } |
886a2506 | 244 | #undef ARC_RELOC_HOWTO |
47b0e7ad | 245 | |
886a2506 NC |
246 | |
247 | #define ARC_RELOC_HOWTO(TYPE, VALUE, SIZE, BITSIZE, RELOC_FUNCTION, OVERFLOW, FORMULA) \ | |
248 | [TYPE] = VALUE, | |
249 | const int howto_table_lookup[] = | |
250 | { | |
34e967a5 | 251 | #include "elf/arc-reloc.def" |
252b5132 | 252 | }; |
886a2506 NC |
253 | #undef ARC_RELOC_HOWTO |
254 | ||
f26dd308 AM |
255 | static reloc_howto_type * |
256 | arc_elf_howto (unsigned int r_type) | |
257 | { | |
258 | if (elf_arc_howto_table[R_ARC_32].dst_mask == 0) | |
259 | arc_elf_howto_init (); | |
260 | return &elf_arc_howto_table[r_type]; | |
261 | } | |
252b5132 RH |
262 | |
263 | /* Map BFD reloc types to ARC ELF reloc types. */ | |
264 | ||
265 | struct arc_reloc_map | |
266 | { | |
34e967a5 | 267 | bfd_reloc_code_real_type bfd_reloc_val; |
08759e0f | 268 | unsigned char elf_reloc_val; |
252b5132 RH |
269 | }; |
270 | ||
8a36df4d CM |
271 | /* ARC ELF linker hash entry. */ |
272 | struct elf_arc_link_hash_entry | |
273 | { | |
274 | struct elf_link_hash_entry root; | |
275 | ||
276 | /* Track dynamic relocs copied for this symbol. */ | |
277 | struct elf_dyn_relocs *dyn_relocs; | |
278 | }; | |
279 | ||
280 | /* ARC ELF linker hash table. */ | |
281 | struct elf_arc_link_hash_table | |
282 | { | |
283 | struct elf_link_hash_table elf; | |
8a36df4d CM |
284 | }; |
285 | ||
286 | static struct bfd_hash_entry * | |
287 | elf_arc_link_hash_newfunc (struct bfd_hash_entry *entry, | |
288 | struct bfd_hash_table *table, | |
289 | const char *string) | |
290 | { | |
291 | /* Allocate the structure if it has not already been allocated by a | |
292 | subclass. */ | |
293 | if (entry == NULL) | |
294 | { | |
295 | entry = (struct bfd_hash_entry *) | |
296 | bfd_hash_allocate (table, | |
297 | sizeof (struct elf_arc_link_hash_entry)); | |
298 | if (entry == NULL) | |
299 | return entry; | |
300 | } | |
301 | ||
302 | /* Call the allocation method of the superclass. */ | |
303 | entry = _bfd_elf_link_hash_newfunc (entry, table, string); | |
304 | if (entry != NULL) | |
305 | { | |
306 | struct elf_arc_link_hash_entry *eh; | |
307 | ||
308 | eh = (struct elf_arc_link_hash_entry *) entry; | |
309 | eh->dyn_relocs = NULL; | |
310 | } | |
311 | ||
312 | return entry; | |
313 | } | |
314 | ||
315 | /* Destroy an ARC ELF linker hash table. */ | |
316 | static void | |
317 | elf_arc_link_hash_table_free (bfd *obfd) | |
318 | { | |
319 | _bfd_elf_link_hash_table_free (obfd); | |
320 | } | |
321 | ||
322 | /* Create an ARC ELF linker hash table. */ | |
323 | ||
324 | static struct bfd_link_hash_table * | |
325 | arc_elf_link_hash_table_create (bfd *abfd) | |
326 | { | |
327 | struct elf_arc_link_hash_table *ret; | |
328 | ||
329 | ret = (struct elf_arc_link_hash_table *) bfd_zmalloc (sizeof (*ret)); | |
330 | if (ret == NULL) | |
331 | return NULL; | |
332 | ||
333 | if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd, | |
334 | elf_arc_link_hash_newfunc, | |
335 | sizeof (struct elf_arc_link_hash_entry), | |
336 | ARC_ELF_DATA)) | |
337 | { | |
338 | free (ret); | |
339 | return NULL; | |
340 | } | |
341 | ||
8a36df4d CM |
342 | ret->elf.init_got_refcount.refcount = 0; |
343 | ret->elf.init_got_refcount.glist = NULL; | |
344 | ret->elf.init_got_offset.offset = 0; | |
345 | ret->elf.init_got_offset.glist = NULL; | |
346 | ||
347 | ret->elf.root.hash_table_free = elf_arc_link_hash_table_free; | |
348 | ||
349 | return &ret->elf.root; | |
350 | } | |
351 | ||
886a2506 NC |
352 | #define ARC_RELOC_HOWTO(TYPE, VALUE, SIZE, BITSIZE, RELOC_FUNCTION, OVERFLOW, FORMULA) \ |
353 | { BFD_RELOC_##TYPE, R_##TYPE }, | |
252b5132 RH |
354 | static const struct arc_reloc_map arc_reloc_map[] = |
355 | { | |
34e967a5 MC |
356 | #include "elf/arc-reloc.def" |
357 | ||
886a2506 NC |
358 | {BFD_RELOC_NONE, R_ARC_NONE}, |
359 | {BFD_RELOC_8, R_ARC_8}, | |
360 | {BFD_RELOC_16, R_ARC_16}, | |
361 | {BFD_RELOC_24, R_ARC_24}, | |
362 | {BFD_RELOC_32, R_ARC_32}, | |
252b5132 | 363 | }; |
886a2506 | 364 | #undef ARC_RELOC_HOWTO |
252b5132 | 365 | |
094fb063 CZ |
366 | typedef ATTRIBUTE_UNUSED bfd_vma (*replace_func) (unsigned, int ATTRIBUTE_UNUSED); |
367 | ||
368 | #define ARC_RELOC_HOWTO(TYPE, VALUE, SIZE, BITSIZE, RELOC_FUNCTION, OVERFLOW, FORMULA) \ | |
369 | case TYPE: \ | |
370 | func = (void *) RELOC_FUNCTION; \ | |
371 | break; | |
372 | static replace_func | |
373 | get_replace_function (bfd *abfd, unsigned int r_type) | |
374 | { | |
375 | void *func = NULL; | |
376 | ||
377 | switch (r_type) | |
378 | { | |
379 | #include "elf/arc-reloc.def" | |
380 | } | |
381 | ||
382 | if (func == replace_bits24 && bfd_big_endian (abfd)) | |
383 | return (replace_func) replace_bits24_be; | |
384 | ||
385 | return (replace_func) func; | |
386 | } | |
387 | #undef ARC_RELOC_HOWTO | |
388 | ||
252b5132 | 389 | static reloc_howto_type * |
34e967a5 | 390 | arc_elf32_bfd_reloc_type_lookup (bfd * abfd ATTRIBUTE_UNUSED, |
47b0e7ad | 391 | bfd_reloc_code_real_type code) |
252b5132 RH |
392 | { |
393 | unsigned int i; | |
394 | ||
ea04a8f6 | 395 | for (i = ARRAY_SIZE (arc_reloc_map); i--;) |
886a2506 NC |
396 | { |
397 | if (arc_reloc_map[i].bfd_reloc_val == code) | |
f26dd308 | 398 | return arc_elf_howto (arc_reloc_map[i].elf_reloc_val); |
886a2506 | 399 | } |
ea04a8f6 | 400 | |
252b5132 RH |
401 | return NULL; |
402 | } | |
403 | ||
34e967a5 MC |
404 | /* Function to set the ELF flag bits. */ |
405 | static bfd_boolean | |
406 | arc_elf_set_private_flags (bfd *abfd, flagword flags) | |
407 | { | |
408 | elf_elfheader (abfd)->e_flags = flags; | |
409 | elf_flags_init (abfd) = TRUE; | |
410 | return TRUE; | |
411 | } | |
412 | ||
413 | /* Print private flags. */ | |
414 | static bfd_boolean | |
415 | arc_elf_print_private_bfd_data (bfd *abfd, void * ptr) | |
416 | { | |
417 | FILE *file = (FILE *) ptr; | |
418 | flagword flags; | |
419 | ||
420 | BFD_ASSERT (abfd != NULL && ptr != NULL); | |
421 | ||
422 | /* Print normal ELF private data. */ | |
423 | _bfd_elf_print_private_bfd_data (abfd, ptr); | |
424 | ||
425 | flags = elf_elfheader (abfd)->e_flags; | |
426 | fprintf (file, _("private flags = 0x%lx:"), (unsigned long) flags); | |
427 | ||
428 | switch (flags & EF_ARC_MACH_MSK) | |
429 | { | |
34e967a5 MC |
430 | case EF_ARC_CPU_ARCV2HS : fprintf (file, " -mcpu=ARCv2HS"); break; |
431 | case EF_ARC_CPU_ARCV2EM : fprintf (file, " -mcpu=ARCv2EM"); break; | |
432 | case E_ARC_MACH_ARC600 : fprintf (file, " -mcpu=ARC600"); break; | |
433 | case E_ARC_MACH_ARC601 : fprintf (file, " -mcpu=ARC601"); break; | |
434 | case E_ARC_MACH_ARC700 : fprintf (file, " -mcpu=ARC700"); break; | |
435 | default: | |
436 | fprintf (file, "-mcpu=unknown"); | |
437 | break; | |
438 | } | |
439 | ||
440 | switch (flags & EF_ARC_OSABI_MSK) | |
441 | { | |
442 | case E_ARC_OSABI_ORIG : fprintf (file, " (ABI:legacy)"); break; | |
443 | case E_ARC_OSABI_V2 : fprintf (file, " (ABI:v2)"); break; | |
444 | case E_ARC_OSABI_V3 : fprintf (file, " (ABI:v3)"); break; | |
445 | default: | |
446 | fprintf (file, "(ABI:unknown)"); | |
447 | break; | |
448 | } | |
449 | ||
450 | fputc ('\n', file); | |
451 | return TRUE; | |
452 | } | |
453 | ||
454 | /* Copy backend specific data from one object module to another. */ | |
455 | ||
456 | static bfd_boolean | |
457 | arc_elf_copy_private_bfd_data (bfd *ibfd, bfd *obfd) | |
458 | { | |
459 | if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour | |
460 | || bfd_get_flavour (obfd) != bfd_target_elf_flavour) | |
461 | return TRUE; | |
462 | ||
463 | BFD_ASSERT (!elf_flags_init (obfd) | |
464 | || elf_elfheader (obfd)->e_flags == elf_elfheader (ibfd)->e_flags); | |
465 | ||
466 | elf_elfheader (obfd)->e_flags = elf_elfheader (ibfd)->e_flags; | |
467 | elf_flags_init (obfd) = TRUE; | |
468 | ||
469 | /* Copy object attributes. */ | |
470 | _bfd_elf_copy_obj_attributes (ibfd, obfd); | |
471 | ||
472 | return _bfd_elf_copy_private_bfd_data (ibfd, obfd); | |
473 | } | |
474 | ||
157090f7 | 475 | static reloc_howto_type * |
34e967a5 MC |
476 | bfd_elf32_bfd_reloc_name_lookup (bfd * abfd ATTRIBUTE_UNUSED, |
477 | const char *r_name) | |
157090f7 AM |
478 | { |
479 | unsigned int i; | |
480 | ||
886a2506 | 481 | for (i = 0; i < ARRAY_SIZE (elf_arc_howto_table); i++) |
157090f7 AM |
482 | if (elf_arc_howto_table[i].name != NULL |
483 | && strcasecmp (elf_arc_howto_table[i].name, r_name) == 0) | |
f26dd308 | 484 | return arc_elf_howto (i); |
157090f7 AM |
485 | |
486 | return NULL; | |
487 | } | |
488 | ||
886a2506 | 489 | /* Set the howto pointer for an ARC ELF reloc. */ |
34e967a5 | 490 | |
252b5132 | 491 | static void |
886a2506 NC |
492 | arc_info_to_howto_rel (bfd * abfd ATTRIBUTE_UNUSED, |
493 | arelent * cache_ptr, | |
494 | Elf_Internal_Rela * dst) | |
252b5132 RH |
495 | { |
496 | unsigned int r_type; | |
497 | ||
498 | r_type = ELF32_R_TYPE (dst->r_info); | |
886a2506 | 499 | BFD_ASSERT (r_type < (unsigned int) R_ARC_max); |
f26dd308 | 500 | cache_ptr->howto = arc_elf_howto (r_type); |
252b5132 RH |
501 | } |
502 | ||
34e967a5 MC |
503 | /* Merge backend specific data from an object file to the output |
504 | object file when linking. */ | |
505 | ||
506 | static bfd_boolean | |
50e03d47 | 507 | arc_elf_merge_private_bfd_data (bfd *ibfd, struct bfd_link_info *info) |
34e967a5 | 508 | { |
50e03d47 | 509 | bfd *obfd = info->output_bfd; |
34e967a5 MC |
510 | unsigned short mach_ibfd; |
511 | static unsigned short mach_obfd = EM_NONE; | |
512 | flagword out_flags; | |
513 | flagword in_flags; | |
514 | asection *sec; | |
515 | ||
516 | /* Check if we have the same endianess. */ | |
50e03d47 | 517 | if (! _bfd_generic_verify_endian_match (ibfd, info)) |
1047201f | 518 | return FALSE; |
34e967a5 MC |
519 | |
520 | /* Collect ELF flags. */ | |
521 | in_flags = elf_elfheader (ibfd)->e_flags & EF_ARC_MACH_MSK; | |
522 | out_flags = elf_elfheader (obfd)->e_flags & EF_ARC_MACH_MSK; | |
523 | ||
524 | if (!elf_flags_init (obfd)) /* First call, no flags set. */ | |
525 | { | |
526 | elf_flags_init (obfd) = TRUE; | |
527 | out_flags = in_flags; | |
528 | } | |
529 | ||
530 | if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour | |
531 | || bfd_get_flavour (obfd) != bfd_target_elf_flavour) | |
532 | return TRUE; | |
533 | ||
534 | /* Check to see if the input BFD actually contains any sections. Do | |
535 | not short-circuit dynamic objects; their section list may be | |
536 | emptied by elf_link_add_object_symbols. */ | |
537 | if (!(ibfd->flags & DYNAMIC)) | |
538 | { | |
539 | bfd_boolean null_input_bfd = TRUE; | |
540 | bfd_boolean only_data_sections = TRUE; | |
541 | ||
542 | for (sec = ibfd->sections; sec != NULL; sec = sec->next) | |
543 | { | |
544 | if ((bfd_get_section_flags (ibfd, sec) | |
545 | & (SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS)) | |
546 | == (SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS)) | |
547 | only_data_sections = FALSE; | |
548 | ||
549 | null_input_bfd = FALSE; | |
550 | } | |
551 | ||
552 | if (null_input_bfd || only_data_sections) | |
553 | return TRUE; | |
554 | } | |
555 | ||
556 | /* Complain about various flag/architecture mismatches. */ | |
557 | mach_ibfd = elf_elfheader (ibfd)->e_machine; | |
558 | if (mach_obfd == EM_NONE) | |
559 | { | |
560 | mach_obfd = mach_ibfd; | |
561 | } | |
562 | else | |
563 | { | |
564 | if (mach_ibfd != mach_obfd) | |
565 | { | |
695344c0 | 566 | /* xgettext:c-format */ |
34e967a5 MC |
567 | _bfd_error_handler (_("ERROR: Attempting to link %B " |
568 | "with a binary %s of different architecture"), | |
569 | ibfd, bfd_get_filename (obfd)); | |
570 | return FALSE; | |
571 | } | |
572 | else if (in_flags != out_flags) | |
573 | { | |
574 | /* Warn if different flags. */ | |
4eca0228 | 575 | _bfd_error_handler |
695344c0 | 576 | /* xgettext:c-format */ |
34e967a5 MC |
577 | (_("%s: uses different e_flags (0x%lx) fields than " |
578 | "previous modules (0x%lx)"), | |
579 | bfd_get_filename (ibfd), (long)in_flags, (long)out_flags); | |
580 | if (in_flags && out_flags) | |
581 | return FALSE; | |
582 | /* MWDT doesnt set the eflags hence make sure we choose the | |
583 | eflags set by gcc. */ | |
584 | in_flags = in_flags > out_flags ? in_flags : out_flags; | |
585 | } | |
586 | } | |
587 | ||
588 | /* Update the flags. */ | |
589 | elf_elfheader (obfd)->e_flags = in_flags; | |
590 | ||
591 | if (bfd_get_mach (obfd) < bfd_get_mach (ibfd)) | |
592 | { | |
593 | return bfd_set_arch_mach (obfd, bfd_arch_arc, bfd_get_mach (ibfd)); | |
594 | } | |
595 | ||
596 | return TRUE; | |
597 | } | |
598 | ||
252b5132 | 599 | /* Set the right machine number for an ARC ELF file. */ |
b34976b6 | 600 | static bfd_boolean |
886a2506 | 601 | arc_elf_object_p (bfd * abfd) |
252b5132 | 602 | { |
886a2506 NC |
603 | /* Make sure this is initialised, or you'll have the potential of passing |
604 | garbage---or misleading values---into the call to | |
605 | bfd_default_set_arch_mach (). */ | |
606 | int mach = bfd_mach_arc_arc700; | |
607 | unsigned long arch = elf_elfheader (abfd)->e_flags & EF_ARC_MACH_MSK; | |
608 | unsigned e_machine = elf_elfheader (abfd)->e_machine; | |
252b5132 | 609 | |
886a2506 | 610 | if (e_machine == EM_ARC_COMPACT || e_machine == EM_ARC_COMPACT2) |
252b5132 | 611 | { |
0d2bcfaf NC |
612 | switch (arch) |
613 | { | |
886a2506 NC |
614 | case E_ARC_MACH_ARC600: |
615 | mach = bfd_mach_arc_arc600; | |
616 | break; | |
617 | case E_ARC_MACH_ARC601: | |
618 | mach = bfd_mach_arc_arc601; | |
619 | break; | |
620 | case E_ARC_MACH_ARC700: | |
621 | mach = bfd_mach_arc_arc700; | |
622 | break; | |
623 | case EF_ARC_CPU_ARCV2HS: | |
624 | case EF_ARC_CPU_ARCV2EM: | |
625 | mach = bfd_mach_arc_arcv2; | |
626 | break; | |
627 | default: | |
08759e0f CM |
628 | mach = (e_machine == EM_ARC_COMPACT) |
629 | ? bfd_mach_arc_arc700 : bfd_mach_arc_arcv2; | |
886a2506 NC |
630 | break; |
631 | } | |
632 | } | |
633 | else | |
634 | { | |
635 | if (e_machine == EM_ARC) | |
636 | { | |
4eca0228 | 637 | _bfd_error_handler |
886a2506 NC |
638 | (_("Error: The ARC4 architecture is no longer supported.\n")); |
639 | return FALSE; | |
640 | } | |
641 | else | |
642 | { | |
4eca0228 | 643 | _bfd_error_handler |
886a2506 NC |
644 | (_("Warning: unset or old architecture flags. \n" |
645 | " Use default machine.\n")); | |
0d2bcfaf | 646 | } |
252b5132 | 647 | } |
886a2506 | 648 | |
0d2bcfaf | 649 | return bfd_default_set_arch_mach (abfd, bfd_arch_arc, mach); |
252b5132 RH |
650 | } |
651 | ||
652 | /* The final processing done just before writing out an ARC ELF object file. | |
653 | This gets the ARC architecture right based on the machine number. */ | |
654 | ||
655 | static void | |
34e967a5 MC |
656 | arc_elf_final_write_processing (bfd * abfd, |
657 | bfd_boolean linker ATTRIBUTE_UNUSED) | |
252b5132 | 658 | { |
886a2506 | 659 | unsigned long emf; |
252b5132 | 660 | |
0d2bcfaf | 661 | switch (bfd_get_mach (abfd)) |
252b5132 | 662 | { |
886a2506 | 663 | case bfd_mach_arc_arc600: |
886a2506 | 664 | emf = EM_ARC_COMPACT; |
0d2bcfaf | 665 | break; |
886a2506 | 666 | case bfd_mach_arc_arc601: |
886a2506 | 667 | emf = EM_ARC_COMPACT; |
0d2bcfaf | 668 | break; |
886a2506 | 669 | case bfd_mach_arc_arc700: |
886a2506 | 670 | emf = EM_ARC_COMPACT; |
0d2bcfaf | 671 | break; |
886a2506 | 672 | case bfd_mach_arc_arcv2: |
886a2506 | 673 | emf = EM_ARC_COMPACT2; |
0d2bcfaf | 674 | break; |
886a2506 | 675 | default: |
3c8adaca | 676 | goto DO_NOTHING; |
252b5132 | 677 | } |
34e967a5 | 678 | |
886a2506 | 679 | elf_elfheader (abfd)->e_machine = emf; |
7e458899 | 680 | |
886a2506 NC |
681 | /* Record whatever is the current syscall ABI version. */ |
682 | elf_elfheader (abfd)->e_flags |= E_ARC_OSABI_CURRENT; | |
3c8adaca CZ |
683 | |
684 | DO_NOTHING: | |
685 | return; | |
252b5132 RH |
686 | } |
687 | ||
f7e8b360 NC |
688 | #ifdef ARC_ENABLE_DEBUG |
689 | #define DEBUG_ARC_RELOC(A) debug_arc_reloc (A) | |
886a2506 NC |
690 | |
691 | static void | |
692 | debug_arc_reloc (struct arc_relocation_data reloc_data) | |
693 | { | |
f7e8b360 NC |
694 | ARC_DEBUG ("Reloc type=%s, should_relocate = %s\n", |
695 | reloc_data.howto->name, | |
696 | reloc_data.should_relocate ? "true" : "false"); | |
697 | ARC_DEBUG (" offset = 0x%x, addend = 0x%x\n", | |
698 | (unsigned int) reloc_data.reloc_offset, | |
699 | (unsigned int) reloc_data.reloc_addend); | |
700 | ARC_DEBUG (" Symbol:\n"); | |
701 | ARC_DEBUG (" value = 0x%08x\n", | |
702 | (unsigned int) reloc_data.sym_value); | |
886a2506 NC |
703 | if (reloc_data.sym_section != NULL) |
704 | { | |
f7e8b360 NC |
705 | ARC_DEBUG (" Symbol Section:\n"); |
706 | ARC_DEBUG (" section name = %s, output_offset 0x%08x", | |
707 | reloc_data.sym_section->name, | |
708 | (unsigned int) reloc_data.sym_section->output_offset); | |
34e967a5 | 709 | if (reloc_data.sym_section->output_section != NULL) |
f7e8b360 | 710 | ARC_DEBUG (", output_section->vma = 0x%08x", |
34e967a5 | 711 | ((unsigned int) reloc_data.sym_section->output_section->vma)); |
f7e8b360 NC |
712 | ARC_DEBUG ("\n"); |
713 | if (reloc_data.sym_section->owner && reloc_data.sym_section->owner->filename) | |
714 | ARC_DEBUG (" file: %s\n", reloc_data.sym_section->owner->filename); | |
886a2506 NC |
715 | } |
716 | else | |
34e967a5 | 717 | { |
f7e8b360 | 718 | ARC_DEBUG (" symbol section is NULL\n"); |
34e967a5 | 719 | } |
886a2506 | 720 | |
f7e8b360 | 721 | ARC_DEBUG (" Input_section:\n"); |
886a2506 NC |
722 | if (reloc_data.input_section != NULL) |
723 | { | |
f7e8b360 NC |
724 | ARC_DEBUG (" section name = %s, output_offset 0x%08x, output_section->vma = 0x%08x\n", |
725 | reloc_data.input_section->name, | |
726 | (unsigned int) reloc_data.input_section->output_offset, | |
727 | (unsigned int) reloc_data.input_section->output_section->vma); | |
728 | ARC_DEBUG (" changed_address = 0x%08x\n", | |
729 | (unsigned int) (reloc_data.input_section->output_section->vma | |
730 | + reloc_data.input_section->output_offset | |
731 | + reloc_data.reloc_offset)); | |
732 | ARC_DEBUG (" file: %s\n", reloc_data.input_section->owner->filename); | |
886a2506 NC |
733 | } |
734 | else | |
34e967a5 | 735 | { |
f7e8b360 | 736 | ARC_DEBUG (" input section is NULL\n"); |
34e967a5 | 737 | } |
886a2506 | 738 | } |
f7e8b360 NC |
739 | #else |
740 | #define DEBUG_ARC_RELOC(A) | |
741 | #endif /* ARC_ENABLE_DEBUG */ | |
886a2506 | 742 | |
72f3b6aa CZ |
743 | static bfd_vma |
744 | middle_endian_convert (bfd_vma insn, bfd_boolean do_it) | |
6f4b1afc | 745 | { |
72f3b6aa CZ |
746 | if (do_it) |
747 | { | |
08759e0f CM |
748 | insn |
749 | = ((insn & 0xffff0000) >> 16) | |
750 | | ((insn & 0xffff) << 16); | |
72f3b6aa CZ |
751 | } |
752 | return insn; | |
6f4b1afc CM |
753 | } |
754 | ||
4b0c052e AB |
755 | /* This function is called for relocations that are otherwise marked as NOT |
756 | requiring overflow checks. In here we perform non-standard checks of | |
757 | the relocation value. */ | |
758 | ||
759 | static inline bfd_reloc_status_type | |
760 | arc_special_overflow_checks (const struct arc_relocation_data reloc_data, | |
08759e0f | 761 | bfd_signed_vma relocation, |
4b0c052e AB |
762 | struct bfd_link_info *info ATTRIBUTE_UNUSED) |
763 | { | |
764 | switch (reloc_data.howto->type) | |
765 | { | |
766 | case R_ARC_NPS_CMEM16: | |
767 | if (((relocation >> 16) & 0xffff) != NPS_CMEM_HIGH_VALUE) | |
08759e0f CM |
768 | { |
769 | if (reloc_data.reloc_addend == 0) | |
4eca0228 | 770 | _bfd_error_handler |
695344c0 | 771 | /* xgettext:c-format */ |
08759e0f CM |
772 | (_("%B(%A+0x%lx): CMEM relocation to `%s' is invalid, " |
773 | "16 MSB should be 0x%04x (value is 0x%lx)"), | |
774 | reloc_data.input_section->owner, | |
775 | reloc_data.input_section, | |
776 | reloc_data.reloc_offset, | |
777 | reloc_data.symbol_name, | |
778 | NPS_CMEM_HIGH_VALUE, | |
779 | (relocation)); | |
780 | else | |
4eca0228 | 781 | _bfd_error_handler |
695344c0 | 782 | /* xgettext:c-format */ |
08759e0f CM |
783 | (_("%B(%A+0x%lx): CMEM relocation to `%s+0x%lx' is invalid, " |
784 | "16 MSB should be 0x%04x (value is 0x%lx)"), | |
785 | reloc_data.input_section->owner, | |
786 | reloc_data.input_section, | |
787 | reloc_data.reloc_offset, | |
788 | reloc_data.symbol_name, | |
789 | reloc_data.reloc_addend, | |
790 | NPS_CMEM_HIGH_VALUE, | |
791 | (relocation)); | |
792 | return bfd_reloc_overflow; | |
793 | } | |
4b0c052e AB |
794 | break; |
795 | ||
796 | default: | |
797 | break; | |
798 | } | |
799 | ||
800 | return bfd_reloc_ok; | |
801 | } | |
802 | ||
72f3b6aa CZ |
803 | #define ME(reloc) (reloc) |
804 | ||
805 | #define IS_ME(FORMULA,BFD) ((strstr (FORMULA, "ME") != NULL) \ | |
806 | && (!bfd_big_endian (BFD))) | |
807 | ||
094fb063 | 808 | #define S ((bfd_signed_vma) (reloc_data.sym_value \ |
34e967a5 MC |
809 | + (reloc_data.sym_section->output_section != NULL ? \ |
810 | (reloc_data.sym_section->output_offset \ | |
094fb063 CZ |
811 | + reloc_data.sym_section->output_section->vma) : 0))) |
812 | #define L ((bfd_signed_vma) (reloc_data.sym_value \ | |
34e967a5 MC |
813 | + (reloc_data.sym_section->output_section != NULL ? \ |
814 | (reloc_data.sym_section->output_offset \ | |
094fb063 | 815 | + reloc_data.sym_section->output_section->vma) : 0))) |
886a2506 NC |
816 | #define A (reloc_data.reloc_addend) |
817 | #define B (0) | |
818 | #define G (reloc_data.got_offset_value) | |
34e967a5 MC |
819 | #define GOT (reloc_data.got_symbol_vma) |
820 | #define GOT_BEGIN (htab->sgot->output_section->vma) | |
821 | ||
886a2506 | 822 | #define MES (0) |
34e967a5 MC |
823 | /* P: relative offset to PCL The offset should be to the |
824 | current location aligned to 32 bits. */ | |
094fb063 | 825 | #define P ((bfd_signed_vma) ( \ |
34e967a5 MC |
826 | ( \ |
827 | (reloc_data.input_section->output_section != NULL ? \ | |
828 | reloc_data.input_section->output_section->vma : 0) \ | |
829 | + reloc_data.input_section->output_offset \ | |
094fb063 CZ |
830 | + (reloc_data.reloc_offset - (bitsize >= 32 ? 4 : 0))) \ |
831 | & ~0x3)) | |
832 | #define PDATA ((bfd_signed_vma) ( \ | |
6f4b1afc CM |
833 | (reloc_data.input_section->output_section->vma \ |
834 | + reloc_data.input_section->output_offset \ | |
094fb063 | 835 | + (reloc_data.reloc_offset)))) |
2ab2f40d CM |
836 | #define SECTSTART (bfd_signed_vma) (reloc_data.sym_section->output_section->vma \ |
837 | + reloc_data.sym_section->output_offset) | |
838 | ||
094fb063 CZ |
839 | #define _SDA_BASE_ (bfd_signed_vma) (reloc_data.sdata_begin_symbol_vma) |
840 | #define TLS_REL (bfd_signed_vma) \ | |
841 | ((elf_hash_table (info))->tls_sec->output_section->vma) | |
34e967a5 MC |
842 | #define TLS_TBSS (8) |
843 | #define TCB_SIZE (8) | |
844 | ||
886a2506 NC |
845 | #define none (0) |
846 | ||
f7e8b360 NC |
847 | #ifdef ARC_ENABLE_DEBUG |
848 | #define PRINT_DEBUG_RELOC_INFO_BEFORE(FORMULA, TYPE) \ | |
849 | do \ | |
850 | { \ | |
851 | asection *sym_section = reloc_data.sym_section; \ | |
852 | asection *input_section = reloc_data.input_section; \ | |
853 | ARC_DEBUG ("RELOC_TYPE = " TYPE "\n"); \ | |
854 | ARC_DEBUG ("FORMULA = " FORMULA "\n"); \ | |
855 | ARC_DEBUG ("S = %#lx\n", S); \ | |
856 | ARC_DEBUG ("A = %#lx\n", A); \ | |
857 | ARC_DEBUG ("L = %lx\n", L); \ | |
858 | if (sym_section->output_section != NULL) \ | |
859 | ARC_DEBUG ("symbol_section->vma = %#lx\n", \ | |
860 | sym_section->output_section->vma \ | |
861 | + sym_section->output_offset); \ | |
862 | else \ | |
863 | ARC_DEBUG ("symbol_section->vma = NULL\n"); \ | |
864 | if (input_section->output_section != NULL) \ | |
865 | ARC_DEBUG ("symbol_section->vma = %#lx\n", \ | |
866 | input_section->output_section->vma \ | |
867 | + input_section->output_offset); \ | |
868 | else \ | |
869 | ARC_DEBUG ("symbol_section->vma = NULL\n"); \ | |
870 | ARC_DEBUG ("PCL = %#lx\n", P); \ | |
871 | ARC_DEBUG ("P = %#lx\n", P); \ | |
872 | ARC_DEBUG ("G = %#lx\n", G); \ | |
873 | ARC_DEBUG ("SDA_OFFSET = %#lx\n", _SDA_BASE_); \ | |
34e967a5 | 874 | ARC_DEBUG ("SDA_SET = %d\n", reloc_data.sdata_begin_symbol_vma_set); \ |
f7e8b360 NC |
875 | ARC_DEBUG ("GOT_OFFSET = %#lx\n", GOT); \ |
876 | ARC_DEBUG ("relocation = %#08lx\n", relocation); \ | |
877 | ARC_DEBUG ("before = %#08x\n", (unsigned) insn); \ | |
878 | ARC_DEBUG ("data = %08x (%u) (%d)\n", (unsigned) relocation, \ | |
879 | (unsigned) relocation, (int) relocation); \ | |
880 | } \ | |
881 | while (0) | |
882 | ||
883 | #define PRINT_DEBUG_RELOC_INFO_AFTER \ | |
884 | do \ | |
885 | { \ | |
886 | ARC_DEBUG ("after = 0x%08x\n", (unsigned int) insn); \ | |
887 | } \ | |
888 | while (0) | |
34e967a5 | 889 | |
f7e8b360 NC |
890 | #else |
891 | ||
892 | #define PRINT_DEBUG_RELOC_INFO_BEFORE(...) | |
893 | #define PRINT_DEBUG_RELOC_INFO_AFTER | |
894 | ||
895 | #endif /* ARC_ENABLE_DEBUG */ | |
34e967a5 | 896 | |
886a2506 | 897 | #define ARC_RELOC_HOWTO(TYPE, VALUE, SIZE, BITSIZE, RELOC_FUNCTION, OVERFLOW, FORMULA) \ |
f7e8b360 NC |
898 | case R_##TYPE: \ |
899 | { \ | |
900 | bfd_signed_vma bitsize ATTRIBUTE_UNUSED = BITSIZE; \ | |
901 | relocation = FORMULA ; \ | |
902 | PRINT_DEBUG_RELOC_INFO_BEFORE (#FORMULA, #TYPE); \ | |
903 | insn = middle_endian_convert (insn, IS_ME (#FORMULA, abfd)); \ | |
904 | insn = (* get_replace_function (abfd, TYPE)) (insn, relocation); \ | |
905 | insn = middle_endian_convert (insn, IS_ME (#FORMULA, abfd)); \ | |
906 | PRINT_DEBUG_RELOC_INFO_AFTER; \ | |
907 | } \ | |
886a2506 NC |
908 | break; |
909 | ||
910 | static bfd_reloc_status_type | |
34e967a5 MC |
911 | arc_do_relocation (bfd_byte * contents, |
912 | struct arc_relocation_data reloc_data, | |
913 | struct bfd_link_info *info) | |
886a2506 | 914 | { |
094fb063 | 915 | bfd_signed_vma relocation = 0; |
886a2506 NC |
916 | bfd_vma insn; |
917 | bfd_vma orig_insn ATTRIBUTE_UNUSED; | |
72f3b6aa | 918 | bfd * abfd = reloc_data.input_section->owner; |
34e967a5 | 919 | struct elf_link_hash_table *htab ATTRIBUTE_UNUSED = elf_hash_table (info); |
4b0c052e | 920 | bfd_reloc_status_type flag; |
886a2506 NC |
921 | |
922 | if (reloc_data.should_relocate == FALSE) | |
34e967a5 | 923 | return bfd_reloc_ok; |
886a2506 NC |
924 | |
925 | switch (reloc_data.howto->size) | |
926 | { | |
927 | case 2: | |
72f3b6aa | 928 | insn = arc_bfd_get_32 (abfd, |
886a2506 NC |
929 | contents + reloc_data.reloc_offset, |
930 | reloc_data.input_section); | |
931 | break; | |
932 | case 1: | |
72f3b6aa CZ |
933 | insn = arc_bfd_get_16 (abfd, |
934 | contents + reloc_data.reloc_offset, | |
935 | reloc_data.input_section); | |
936 | break; | |
886a2506 | 937 | case 0: |
72f3b6aa | 938 | insn = arc_bfd_get_8 (abfd, |
886a2506 NC |
939 | contents + reloc_data.reloc_offset, |
940 | reloc_data.input_section); | |
941 | break; | |
942 | default: | |
943 | insn = 0; | |
944 | BFD_ASSERT (0); | |
945 | break; | |
946 | } | |
947 | ||
948 | orig_insn = insn; | |
949 | ||
950 | switch (reloc_data.howto->type) | |
951 | { | |
34e967a5 | 952 | #include "elf/arc-reloc.def" |
886a2506 NC |
953 | |
954 | default: | |
955 | BFD_ASSERT (0); | |
956 | break; | |
957 | } | |
958 | ||
959 | /* Check for relocation overflow. */ | |
960 | if (reloc_data.howto->complain_on_overflow != complain_overflow_dont) | |
4b0c052e | 961 | flag = bfd_check_overflow (reloc_data.howto->complain_on_overflow, |
08759e0f CM |
962 | reloc_data.howto->bitsize, |
963 | reloc_data.howto->rightshift, | |
964 | bfd_arch_bits_per_address (abfd), | |
965 | relocation); | |
4b0c052e AB |
966 | else |
967 | flag = arc_special_overflow_checks (reloc_data, relocation, info); | |
886a2506 | 968 | |
4b0c052e AB |
969 | if (flag != bfd_reloc_ok) |
970 | { | |
f7e8b360 | 971 | ARC_DEBUG ("Relocation overflows !\n"); |
4b0c052e | 972 | DEBUG_ARC_RELOC (reloc_data); |
f7e8b360 NC |
973 | ARC_DEBUG ("Relocation value = signed -> %d, unsigned -> %u" |
974 | ", hex -> (0x%08x)\n", | |
975 | (int) relocation, (unsigned) relocation, (int) relocation); | |
886a2506 | 976 | |
4b0c052e | 977 | return flag; |
886a2506 | 978 | } |
886a2506 | 979 | |
4b0c052e | 980 | /* Write updated instruction back to memory. */ |
886a2506 NC |
981 | switch (reloc_data.howto->size) |
982 | { | |
983 | case 2: | |
72f3b6aa | 984 | arc_bfd_put_32 (abfd, insn, |
886a2506 NC |
985 | contents + reloc_data.reloc_offset, |
986 | reloc_data.input_section); | |
987 | break; | |
988 | case 1: | |
72f3b6aa CZ |
989 | arc_bfd_put_16 (abfd, insn, |
990 | contents + reloc_data.reloc_offset, | |
991 | reloc_data.input_section); | |
992 | break; | |
886a2506 | 993 | case 0: |
72f3b6aa | 994 | arc_bfd_put_8 (abfd, insn, |
886a2506 NC |
995 | contents + reloc_data.reloc_offset, |
996 | reloc_data.input_section); | |
997 | break; | |
998 | default: | |
999 | ARC_DEBUG ("size = %d\n", reloc_data.howto->size); | |
1000 | BFD_ASSERT (0); | |
1001 | break; | |
1002 | } | |
1003 | ||
1004 | return bfd_reloc_ok; | |
1005 | } | |
1006 | #undef S | |
1007 | #undef A | |
1008 | #undef B | |
1009 | #undef G | |
1010 | #undef GOT | |
1011 | #undef L | |
1012 | #undef MES | |
1013 | #undef P | |
1014 | #undef SECTSTAR | |
1015 | #undef SECTSTART | |
1016 | #undef _SDA_BASE_ | |
1017 | #undef none | |
1018 | ||
1019 | #undef ARC_RELOC_HOWTO | |
1020 | ||
886a2506 | 1021 | |
886a2506 NC |
1022 | /* Relocate an arc ELF section. |
1023 | Function : elf_arc_relocate_section | |
1024 | Brief : Relocate an arc section, by handling all the relocations | |
34e967a5 | 1025 | appearing in that section. |
886a2506 | 1026 | Args : output_bfd : The bfd being written to. |
34e967a5 MC |
1027 | info : Link information. |
1028 | input_bfd : The input bfd. | |
1029 | input_section : The section being relocated. | |
1030 | contents : contents of the section being relocated. | |
1031 | relocs : List of relocations in the section. | |
1032 | local_syms : is a pointer to the swapped in local symbols. | |
1033 | local_section : is an array giving the section in the input file | |
1034 | corresponding to the st_shndx field of each | |
1035 | local symbol. */ | |
886a2506 | 1036 | static bfd_boolean |
f7e8b360 | 1037 | elf_arc_relocate_section (bfd * output_bfd, |
886a2506 | 1038 | struct bfd_link_info * info, |
f7e8b360 NC |
1039 | bfd * input_bfd, |
1040 | asection * input_section, | |
1041 | bfd_byte * contents, | |
886a2506 NC |
1042 | Elf_Internal_Rela * relocs, |
1043 | Elf_Internal_Sym * local_syms, | |
f7e8b360 | 1044 | asection ** local_sections) |
886a2506 | 1045 | { |
f7e8b360 NC |
1046 | Elf_Internal_Shdr * symtab_hdr; |
1047 | struct elf_link_hash_entry ** sym_hashes; | |
1048 | Elf_Internal_Rela * rel; | |
1049 | Elf_Internal_Rela * wrel; | |
1050 | Elf_Internal_Rela * relend; | |
1051 | struct elf_link_hash_table * htab = elf_hash_table (info); | |
886a2506 NC |
1052 | |
1053 | symtab_hdr = &((elf_tdata (input_bfd))->symtab_hdr); | |
1054 | sym_hashes = elf_sym_hashes (input_bfd); | |
1055 | ||
3c8adaca | 1056 | rel = wrel = relocs; |
886a2506 | 1057 | relend = relocs + input_section->reloc_count; |
3c8adaca | 1058 | for (; rel < relend; wrel++, rel++) |
886a2506 NC |
1059 | { |
1060 | enum elf_arc_reloc_type r_type; | |
34e967a5 | 1061 | reloc_howto_type * howto; |
f7e8b360 | 1062 | unsigned long r_symndx; |
886a2506 | 1063 | struct elf_link_hash_entry * h; |
34e967a5 MC |
1064 | Elf_Internal_Sym * sym; |
1065 | asection * sec; | |
f7e8b360 NC |
1066 | struct elf_link_hash_entry * h2; |
1067 | const char * msg; | |
886a2506 NC |
1068 | |
1069 | struct arc_relocation_data reloc_data = | |
1070 | { | |
34e967a5 MC |
1071 | .reloc_offset = 0, |
1072 | .reloc_addend = 0, | |
1073 | .got_offset_value = 0, | |
1074 | .sym_value = 0, | |
1075 | .sym_section = NULL, | |
1076 | .howto = NULL, | |
1077 | .input_section = NULL, | |
1078 | .sdata_begin_symbol_vma = 0, | |
1079 | .sdata_begin_symbol_vma_set = FALSE, | |
1080 | .got_symbol_vma = 0, | |
1081 | .should_relocate = FALSE | |
886a2506 NC |
1082 | }; |
1083 | ||
34e967a5 MC |
1084 | r_type = ELF32_R_TYPE (rel->r_info); |
1085 | ||
1086 | if (r_type >= (int) R_ARC_max) | |
1087 | { | |
1088 | bfd_set_error (bfd_error_bad_value); | |
1089 | return FALSE; | |
1090 | } | |
3c8adaca | 1091 | howto = arc_elf_howto (r_type); |
34e967a5 MC |
1092 | |
1093 | r_symndx = ELF32_R_SYM (rel->r_info); | |
1094 | ||
1095 | /* If we are generating another .o file and the symbol in not | |
1096 | local, skip this relocation. */ | |
1097 | if (bfd_link_relocatable (info)) | |
1098 | { | |
1099 | /* This is a relocateable link. We don't have to change | |
1100 | anything, unless the reloc is against a section symbol, | |
1101 | in which case we have to adjust according to where the | |
1102 | section symbol winds up in the output section. */ | |
1103 | ||
1104 | /* Checks if this is a local symbol and thus the reloc | |
1105 | might (will??) be against a section symbol. */ | |
1106 | if (r_symndx < symtab_hdr->sh_info) | |
1107 | { | |
1108 | sym = local_syms + r_symndx; | |
1109 | if (ELF_ST_TYPE (sym->st_info) == STT_SECTION) | |
1110 | { | |
1111 | sec = local_sections[r_symndx]; | |
1112 | ||
f7e8b360 | 1113 | /* For RELA relocs. Just adjust the addend |
34e967a5 MC |
1114 | value in the relocation entry. */ |
1115 | rel->r_addend += sec->output_offset + sym->st_value; | |
1116 | ||
f7e8b360 NC |
1117 | ARC_DEBUG ("local symbols reloc (section=%d %s) seen in %s\n", |
1118 | (int) r_symndx, local_sections[r_symndx]->name, | |
1119 | __PRETTY_FUNCTION__); | |
34e967a5 MC |
1120 | } |
1121 | } | |
34e967a5 | 1122 | } |
886a2506 NC |
1123 | |
1124 | h2 = elf_link_hash_lookup (elf_hash_table (info), "__SDATA_BEGIN__", | |
1125 | FALSE, FALSE, TRUE); | |
1126 | ||
1127 | if (reloc_data.sdata_begin_symbol_vma_set == FALSE | |
34e967a5 MC |
1128 | && h2 != NULL && h2->root.type != bfd_link_hash_undefined |
1129 | && h2->root.u.def.section->output_section != NULL) | |
1130 | /* TODO: Verify this condition. */ | |
886a2506 NC |
1131 | { |
1132 | reloc_data.sdata_begin_symbol_vma = | |
08759e0f CM |
1133 | (h2->root.u.def.value |
1134 | + h2->root.u.def.section->output_section->vma); | |
886a2506 NC |
1135 | reloc_data.sdata_begin_symbol_vma_set = TRUE; |
1136 | } | |
1137 | ||
886a2506 NC |
1138 | reloc_data.input_section = input_section; |
1139 | reloc_data.howto = howto; | |
1140 | reloc_data.reloc_offset = rel->r_offset; | |
1141 | reloc_data.reloc_addend = rel->r_addend; | |
1142 | ||
886a2506 NC |
1143 | /* This is a final link. */ |
1144 | h = NULL; | |
1145 | sym = NULL; | |
1146 | sec = NULL; | |
1147 | ||
1148 | if (r_symndx < symtab_hdr->sh_info) /* A local symbol. */ | |
1149 | { | |
1150 | sym = local_syms + r_symndx; | |
1151 | sec = local_sections[r_symndx]; | |
3c8adaca CZ |
1152 | } |
1153 | else | |
1154 | { | |
1155 | /* TODO: This code is repeated from below. We should | |
1156 | clean it and remove duplications. | |
1157 | Sec is used check for discarded sections. | |
1158 | Need to redesign code below. */ | |
1159 | ||
1160 | /* Get the symbol's entry in the symtab. */ | |
1161 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
1162 | ||
1163 | while (h->root.type == bfd_link_hash_indirect | |
1164 | || h->root.type == bfd_link_hash_warning) | |
1165 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
1166 | ||
1167 | /* If we have encountered a definition for this symbol. */ | |
1168 | if (h->root.type == bfd_link_hash_defined | |
1169 | || h->root.type == bfd_link_hash_defweak) | |
1170 | { | |
1171 | reloc_data.sym_value = h->root.u.def.value; | |
1172 | sec = h->root.u.def.section; | |
1173 | } | |
1174 | } | |
1175 | ||
1176 | /* Clean relocs for symbols in discarded sections. */ | |
1177 | if (sec != NULL && discarded_section (sec)) | |
1178 | { | |
1179 | _bfd_clear_contents (howto, input_bfd, input_section, | |
1180 | contents + rel->r_offset); | |
1181 | rel->r_offset = rel->r_offset; | |
1182 | rel->r_info = 0; | |
1183 | rel->r_addend = 0; | |
1184 | ||
1185 | /* For ld -r, remove relocations in debug sections against | |
1186 | sections defined in discarded sections. Not done for | |
1187 | eh_frame editing code expects to be present. */ | |
1188 | if (bfd_link_relocatable (info) | |
1189 | && (input_section->flags & SEC_DEBUGGING)) | |
1190 | wrel--; | |
1191 | ||
1192 | continue; | |
1193 | } | |
1194 | ||
1195 | if (bfd_link_relocatable (info)) | |
1196 | { | |
1197 | if (wrel != rel) | |
1198 | *wrel = *rel; | |
1199 | continue; | |
1200 | } | |
1201 | ||
1202 | if (r_symndx < symtab_hdr->sh_info) /* A local symbol. */ | |
1203 | { | |
886a2506 NC |
1204 | reloc_data.sym_value = sym->st_value; |
1205 | reloc_data.sym_section = sec; | |
4b0c052e | 1206 | reloc_data.symbol_name = |
3c8adaca CZ |
1207 | bfd_elf_string_from_elf_section (input_bfd, |
1208 | symtab_hdr->sh_link, | |
1209 | sym->st_name); | |
886a2506 | 1210 | |
841fdfcd CZ |
1211 | /* Mergeable section handling. */ |
1212 | if ((sec->flags & SEC_MERGE) | |
1213 | && ELF_ST_TYPE (sym->st_info) == STT_SECTION) | |
1214 | { | |
1215 | asection *msec; | |
1216 | msec = sec; | |
1217 | rel->r_addend = _bfd_elf_rel_local_sym (output_bfd, sym, | |
1218 | &msec, rel->r_addend); | |
1219 | rel->r_addend -= (sec->output_section->vma | |
1220 | + sec->output_offset | |
1221 | + sym->st_value); | |
1222 | rel->r_addend += msec->output_section->vma + msec->output_offset; | |
1223 | ||
1224 | reloc_data.reloc_addend = rel->r_addend; | |
1225 | } | |
1226 | ||
34e967a5 MC |
1227 | BFD_ASSERT (htab->sgot != NULL || !is_reloc_for_GOT (howto)); |
1228 | if (htab->sgot != NULL) | |
1229 | reloc_data.got_symbol_vma = htab->sgot->output_section->vma | |
1230 | + htab->sgot->output_offset; | |
886a2506 NC |
1231 | |
1232 | reloc_data.should_relocate = TRUE; | |
1233 | } | |
1234 | else /* Global symbol. */ | |
1235 | { | |
f7e8b360 NC |
1236 | /* FIXME: We should use the RELOC_FOR_GLOBAL_SYMBOL macro |
1237 | (defined in elf-bfd.h) here. */ | |
1238 | ||
886a2506 NC |
1239 | /* Get the symbol's entry in the symtab. */ |
1240 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
1241 | ||
1242 | while (h->root.type == bfd_link_hash_indirect | |
1243 | || h->root.type == bfd_link_hash_warning) | |
1244 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
1245 | ||
3c8adaca CZ |
1246 | /* TODO: Need to validate what was the intention. */ |
1247 | /* BFD_ASSERT ((h->dynindx == -1) || (h->forced_local != 0)); */ | |
4b0c052e | 1248 | reloc_data.symbol_name = h->root.root.string; |
3c8adaca | 1249 | |
886a2506 NC |
1250 | /* If we have encountered a definition for this symbol. */ |
1251 | if (h->root.type == bfd_link_hash_defined | |
1252 | || h->root.type == bfd_link_hash_defweak) | |
1253 | { | |
1254 | reloc_data.sym_value = h->root.u.def.value; | |
1255 | reloc_data.sym_section = h->root.u.def.section; | |
1256 | ||
1257 | reloc_data.should_relocate = TRUE; | |
1258 | ||
34e967a5 | 1259 | if (is_reloc_for_GOT (howto) && !bfd_link_pic (info)) |
886a2506 | 1260 | { |
34e967a5 MC |
1261 | /* TODO: Change it to use arc_do_relocation with |
1262 | ARC_32 reloc. Try to use ADD_RELA macro. */ | |
886a2506 NC |
1263 | bfd_vma relocation = |
1264 | reloc_data.sym_value + reloc_data.reloc_addend | |
34e967a5 MC |
1265 | + (reloc_data.sym_section->output_section != NULL ? |
1266 | (reloc_data.sym_section->output_offset | |
1267 | + reloc_data.sym_section->output_section->vma) | |
1268 | : 0); | |
1269 | ||
1270 | BFD_ASSERT (h->got.glist); | |
1271 | bfd_vma got_offset = h->got.glist->offset; | |
1272 | bfd_put_32 (output_bfd, relocation, | |
1273 | htab->sgot->contents + got_offset); | |
1274 | } | |
1275 | if (is_reloc_for_PLT (howto) && h->plt.offset != (bfd_vma) -1) | |
1276 | { | |
1277 | /* TODO: This is repeated up here. */ | |
1278 | reloc_data.sym_value = h->plt.offset; | |
1279 | reloc_data.sym_section = htab->splt; | |
886a2506 NC |
1280 | } |
1281 | } | |
1282 | else if (h->root.type == bfd_link_hash_undefweak) | |
1283 | { | |
1284 | /* Is weak symbol and has no definition. */ | |
34e967a5 MC |
1285 | if (is_reloc_for_GOT (howto)) |
1286 | { | |
1287 | reloc_data.sym_value = h->root.u.def.value; | |
1288 | reloc_data.sym_section = htab->sgot; | |
1289 | reloc_data.should_relocate = TRUE; | |
1290 | } | |
1291 | else if (is_reloc_for_PLT (howto) | |
1292 | && h->plt.offset != (bfd_vma) -1) | |
1293 | { | |
1294 | /* TODO: This is repeated up here. */ | |
1295 | reloc_data.sym_value = h->plt.offset; | |
1296 | reloc_data.sym_section = htab->splt; | |
1297 | reloc_data.should_relocate = TRUE; | |
1298 | } | |
1299 | else | |
1300 | continue; | |
886a2506 NC |
1301 | } |
1302 | else | |
1303 | { | |
1304 | if (is_reloc_for_GOT (howto)) | |
1305 | { | |
886a2506 | 1306 | reloc_data.sym_value = h->root.u.def.value; |
34e967a5 | 1307 | reloc_data.sym_section = htab->sgot; |
886a2506 NC |
1308 | |
1309 | reloc_data.should_relocate = TRUE; | |
1310 | } | |
1311 | else if (is_reloc_for_PLT (howto)) | |
1312 | { | |
7e458899 CZ |
1313 | /* Fail if it is linking for PIE and the symbol is |
1314 | undefined. */ | |
1a72702b AM |
1315 | if (bfd_link_executable (info)) |
1316 | (*info->callbacks->undefined_symbol) | |
1317 | (info, h->root.root.string, input_bfd, input_section, | |
1318 | rel->r_offset, TRUE); | |
886a2506 | 1319 | reloc_data.sym_value = h->plt.offset; |
34e967a5 | 1320 | reloc_data.sym_section = htab->splt; |
886a2506 NC |
1321 | |
1322 | reloc_data.should_relocate = TRUE; | |
1323 | } | |
8a36df4d | 1324 | else if (!bfd_link_pic (info) || bfd_link_executable (info)) |
1a72702b AM |
1325 | (*info->callbacks->undefined_symbol) |
1326 | (info, h->root.root.string, input_bfd, input_section, | |
1327 | rel->r_offset, TRUE); | |
886a2506 NC |
1328 | } |
1329 | ||
34e967a5 MC |
1330 | BFD_ASSERT (htab->sgot != NULL || !is_reloc_for_GOT (howto)); |
1331 | if (htab->sgot != NULL) | |
1332 | reloc_data.got_symbol_vma = htab->sgot->output_section->vma | |
1333 | + htab->sgot->output_offset; | |
886a2506 NC |
1334 | } |
1335 | ||
08759e0f CM |
1336 | if ((is_reloc_for_GOT (howto) |
1337 | || is_reloc_for_TLS (howto))) | |
1338 | { | |
980aa3e6 CM |
1339 | reloc_data.should_relocate = TRUE; |
1340 | ||
08759e0f CM |
1341 | struct got_entry **list |
1342 | = get_got_entry_list_for_symbol (output_bfd, r_symndx, h); | |
1343 | ||
1344 | reloc_data.got_offset_value | |
1345 | = relocate_fix_got_relocs_for_got_info (list, | |
1346 | tls_type_for_reloc (howto), | |
1347 | info, | |
1348 | output_bfd, | |
1349 | r_symndx, | |
1350 | local_syms, | |
1351 | local_sections, | |
1352 | h, | |
1353 | &reloc_data); | |
1354 | ||
1355 | if (h == NULL) | |
1356 | { | |
1357 | create_got_dynrelocs_for_single_entry ( | |
1358 | got_entry_for_type (list, | |
1359 | arc_got_entry_type_for_reloc (howto)), | |
1360 | output_bfd, info, NULL); | |
1361 | } | |
1362 | } | |
f7e8b360 | 1363 | |
34e967a5 MC |
1364 | switch (r_type) |
1365 | { | |
1366 | case R_ARC_32: | |
1367 | case R_ARC_32_ME: | |
1368 | case R_ARC_PC32: | |
1369 | case R_ARC_32_PCREL: | |
8a36df4d | 1370 | if ((bfd_link_pic (info)) |
34e967a5 MC |
1371 | && ((r_type != R_ARC_PC32 && r_type != R_ARC_32_PCREL) |
1372 | || (h != NULL | |
1373 | && h->dynindx != -1 | |
1374 | && (!info->symbolic || !h->def_regular)))) | |
1375 | { | |
1376 | Elf_Internal_Rela outrel; | |
1377 | bfd_byte *loc; | |
1378 | bfd_boolean skip = FALSE; | |
1379 | bfd_boolean relocate = FALSE; | |
1380 | asection *sreloc = _bfd_elf_get_dynamic_reloc_section | |
1381 | (input_bfd, input_section, | |
1382 | /*RELA*/ TRUE); | |
1383 | ||
1384 | BFD_ASSERT (sreloc != NULL); | |
1385 | ||
1386 | outrel.r_offset = _bfd_elf_section_offset (output_bfd, | |
1387 | info, | |
1388 | input_section, | |
1389 | rel->r_offset); | |
1390 | if (outrel.r_offset == (bfd_vma) -1) | |
1391 | skip = TRUE; | |
1392 | ||
1393 | outrel.r_addend = rel->r_addend; | |
1394 | outrel.r_offset += (input_section->output_section->vma | |
1395 | + input_section->output_offset); | |
1396 | ||
3c8adaca | 1397 | #define IS_ARC_PCREL_TYPE(TYPE) \ |
f7e8b360 | 1398 | ( (TYPE == R_ARC_PC32) \ |
3c8adaca | 1399 | || (TYPE == R_ARC_32_PCREL)) |
f7e8b360 | 1400 | |
34e967a5 MC |
1401 | if (skip) |
1402 | { | |
1403 | memset (&outrel, 0, sizeof outrel); | |
1404 | relocate = FALSE; | |
1405 | } | |
3c8adaca CZ |
1406 | else if (h != NULL |
1407 | && h->dynindx != -1 | |
1408 | && ((IS_ARC_PCREL_TYPE (r_type)) | |
1409 | || !(bfd_link_executable (info) | |
1410 | || SYMBOLIC_BIND (info, h)) | |
1411 | || ! h->def_regular)) | |
34e967a5 | 1412 | { |
94e5c971 | 1413 | BFD_ASSERT (h != NULL); |
34e967a5 MC |
1414 | if ((input_section->flags & SEC_ALLOC) != 0) |
1415 | relocate = FALSE; | |
1416 | else | |
1417 | relocate = TRUE; | |
94e5c971 CZ |
1418 | |
1419 | BFD_ASSERT (h->dynindx != -1); | |
34e967a5 MC |
1420 | outrel.r_info = ELF32_R_INFO (h->dynindx, r_type); |
1421 | } | |
1422 | else | |
1423 | { | |
1424 | /* Handle local symbols, they either do not have a | |
1425 | global hash table entry (h == NULL), or are | |
1426 | forced local due to a version script | |
1427 | (h->forced_local), or the third condition is | |
1428 | legacy, it appears to say something like, for | |
1429 | links where we are pre-binding the symbols, or | |
1430 | there's not an entry for this symbol in the | |
1431 | dynamic symbol table, and it's a regular symbol | |
1432 | not defined in a shared object, then treat the | |
1433 | symbol as local, resolve it now. */ | |
3c8adaca CZ |
1434 | relocate = TRUE; |
1435 | /* outrel.r_addend = 0; */ | |
1436 | outrel.r_info = ELF32_R_INFO (0, R_ARC_RELATIVE); | |
34e967a5 MC |
1437 | } |
1438 | ||
1439 | BFD_ASSERT (sreloc->contents != 0); | |
1440 | ||
1441 | loc = sreloc->contents; | |
1442 | loc += sreloc->reloc_count * sizeof (Elf32_External_Rela); | |
1443 | sreloc->reloc_count += 1; | |
1444 | ||
1445 | bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); | |
1446 | ||
1447 | if (relocate == FALSE) | |
1448 | continue; | |
1449 | } | |
1450 | break; | |
1451 | default: | |
1452 | break; | |
1453 | } | |
1454 | ||
1455 | if (is_reloc_SDA_relative (howto) | |
1456 | && (reloc_data.sdata_begin_symbol_vma_set == FALSE)) | |
886a2506 | 1457 | { |
4eca0228 AM |
1458 | _bfd_error_handler |
1459 | ("Error: Linker symbol __SDATA_BEGIN__ not found"); | |
886a2506 NC |
1460 | bfd_set_error (bfd_error_bad_value); |
1461 | return FALSE; | |
1462 | } | |
1463 | ||
1464 | DEBUG_ARC_RELOC (reloc_data); | |
34e967a5 | 1465 | |
2ab2f40d | 1466 | /* Make sure we have with a dynamic linker. In case of GOT and PLT |
08759e0f | 1467 | the sym_section should point to .got or .plt respectively. */ |
815dc1bc CZ |
1468 | if ((is_reloc_for_GOT (howto) || is_reloc_for_PLT (howto)) |
1469 | && reloc_data.sym_section == NULL) | |
2ab2f40d | 1470 | { |
4eca0228 | 1471 | _bfd_error_handler |
2ab2f40d CM |
1472 | (_("GOT and PLT relocations cannot be fixed with a non dynamic linker.")); |
1473 | bfd_set_error (bfd_error_bad_value); | |
1474 | return FALSE; | |
1475 | } | |
1476 | ||
f7e8b360 NC |
1477 | msg = NULL; |
1478 | switch (arc_do_relocation (contents, reloc_data, info)) | |
1479 | { | |
1480 | case bfd_reloc_ok: | |
1481 | continue; /* The reloc processing loop. */ | |
1482 | ||
1483 | case bfd_reloc_overflow: | |
1484 | (*info->callbacks->reloc_overflow) | |
1485 | (info, (h ? &h->root : NULL), reloc_data.symbol_name, howto->name, (bfd_vma) 0, | |
1486 | input_bfd, input_section, rel->r_offset); | |
1487 | break; | |
1488 | ||
1489 | case bfd_reloc_undefined: | |
1490 | (*info->callbacks->undefined_symbol) | |
1491 | (info, reloc_data.symbol_name, input_bfd, input_section, rel->r_offset, TRUE); | |
1492 | break; | |
1493 | ||
1494 | case bfd_reloc_other: | |
695344c0 | 1495 | /* xgettext:c-format */ |
f7e8b360 NC |
1496 | msg = _("%B(%A): warning: unaligned access to symbol '%s' in the small data area"); |
1497 | break; | |
1498 | ||
1499 | case bfd_reloc_outofrange: | |
695344c0 | 1500 | /* xgettext:c-format */ |
f7e8b360 NC |
1501 | msg = _("%B(%A): internal error: out of range error"); |
1502 | break; | |
1503 | ||
1504 | case bfd_reloc_notsupported: | |
695344c0 | 1505 | /* xgettext:c-format */ |
f7e8b360 NC |
1506 | msg = _("%B(%A): internal error: unsupported relocation error"); |
1507 | break; | |
1508 | ||
1509 | case bfd_reloc_dangerous: | |
695344c0 | 1510 | /* xgettext:c-format */ |
f7e8b360 NC |
1511 | msg = _("%B(%A): internal error: dangerous relocation"); |
1512 | break; | |
1513 | ||
1514 | default: | |
695344c0 | 1515 | /* xgettext:c-format */ |
f7e8b360 NC |
1516 | msg = _("%B(%A): internal error: unknown error"); |
1517 | break; | |
1518 | } | |
1519 | ||
1520 | if (msg) | |
1521 | _bfd_error_handler (msg, input_bfd, input_section, reloc_data.symbol_name); | |
1522 | return FALSE; | |
886a2506 NC |
1523 | } |
1524 | ||
1525 | return TRUE; | |
1526 | } | |
1527 | ||
8a36df4d CM |
1528 | #define elf_arc_hash_table(p) \ |
1529 | (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \ | |
1530 | == ARC_ELF_DATA ? ((struct elf_arc_link_hash_table *) ((p)->hash)) : NULL) | |
1531 | ||
886a2506 | 1532 | static bfd_boolean |
08759e0f | 1533 | elf_arc_check_relocs (bfd * abfd, |
886a2506 | 1534 | struct bfd_link_info * info, |
34e967a5 | 1535 | asection * sec, |
886a2506 NC |
1536 | const Elf_Internal_Rela * relocs) |
1537 | { | |
34e967a5 MC |
1538 | Elf_Internal_Shdr * symtab_hdr; |
1539 | struct elf_link_hash_entry ** sym_hashes; | |
34e967a5 MC |
1540 | const Elf_Internal_Rela * rel; |
1541 | const Elf_Internal_Rela * rel_end; | |
1542 | bfd * dynobj; | |
1543 | asection * sreloc = NULL; | |
34e967a5 MC |
1544 | |
1545 | if (bfd_link_relocatable (info)) | |
1546 | return TRUE; | |
886a2506 NC |
1547 | |
1548 | dynobj = (elf_hash_table (info))->dynobj; | |
1549 | symtab_hdr = &((elf_tdata (abfd))->symtab_hdr); | |
1550 | sym_hashes = elf_sym_hashes (abfd); | |
886a2506 NC |
1551 | |
1552 | rel_end = relocs + sec->reloc_count; | |
1553 | for (rel = relocs; rel < rel_end; rel++) | |
1554 | { | |
1555 | enum elf_arc_reloc_type r_type; | |
1556 | reloc_howto_type *howto; | |
1557 | unsigned long r_symndx; | |
1558 | struct elf_link_hash_entry *h; | |
1559 | ||
1560 | r_type = ELF32_R_TYPE (rel->r_info); | |
1561 | ||
1562 | if (r_type >= (int) R_ARC_max) | |
1563 | { | |
1564 | bfd_set_error (bfd_error_bad_value); | |
1565 | return FALSE; | |
1566 | } | |
3c8adaca | 1567 | howto = arc_elf_howto (r_type); |
34e967a5 MC |
1568 | |
1569 | if (dynobj == NULL | |
1570 | && (is_reloc_for_GOT (howto) == TRUE | |
1571 | || is_reloc_for_TLS (howto) == TRUE)) | |
1572 | { | |
1573 | dynobj = elf_hash_table (info)->dynobj = abfd; | |
1574 | if (! _bfd_elf_create_got_section (abfd, info)) | |
1575 | return FALSE; | |
1576 | } | |
886a2506 NC |
1577 | |
1578 | /* Load symbol information. */ | |
1579 | r_symndx = ELF32_R_SYM (rel->r_info); | |
1580 | if (r_symndx < symtab_hdr->sh_info) /* Is a local symbol. */ | |
1581 | h = NULL; | |
1582 | else /* Global one. */ | |
1583 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
1584 | ||
34e967a5 MC |
1585 | switch (r_type) |
1586 | { | |
1587 | case R_ARC_32: | |
1588 | case R_ARC_32_ME: | |
1589 | /* During shared library creation, these relocs should not | |
1590 | appear in a shared library (as memory will be read only | |
1591 | and the dynamic linker can not resolve these. However | |
1592 | the error should not occur for e.g. debugging or | |
1593 | non-readonly sections. */ | |
2ab2f40d | 1594 | if ((bfd_link_dll (info) && !bfd_link_pie (info)) |
34e967a5 | 1595 | && (sec->flags & SEC_ALLOC) != 0 |
3c8adaca CZ |
1596 | && (sec->flags & SEC_READONLY) != 0 |
1597 | && ((sec->flags & SEC_CODE) != 0 | |
1598 | || (sec->flags & SEC_DEBUGGING) != 0)) | |
34e967a5 MC |
1599 | { |
1600 | const char *name; | |
1601 | if (h) | |
1602 | name = h->root.root.string; | |
1603 | else | |
1604 | /* bfd_elf_sym_name (abfd, symtab_hdr, isym, NULL); */ | |
1605 | name = "UNKNOWN"; | |
4eca0228 | 1606 | _bfd_error_handler |
695344c0 | 1607 | /* xgettext:c-format */ |
34e967a5 MC |
1608 | (_("\ |
1609 | %B: relocation %s against `%s' can not be used when making a shared object; recompile with -fPIC"), | |
1610 | abfd, | |
1611 | arc_elf_howto (r_type)->name, | |
1612 | name); | |
1613 | bfd_set_error (bfd_error_bad_value); | |
1614 | return FALSE; | |
1615 | } | |
1616 | ||
1617 | /* In some cases we are not setting the 'non_got_ref' | |
1618 | flag, even though the relocations don't require a GOT | |
1619 | access. We should extend the testing in this area to | |
1620 | ensure that no significant cases are being missed. */ | |
1621 | if (h) | |
1622 | h->non_got_ref = 1; | |
1623 | /* FALLTHROUGH */ | |
1624 | case R_ARC_PC32: | |
1625 | case R_ARC_32_PCREL: | |
8a36df4d | 1626 | if ((bfd_link_pic (info)) |
34e967a5 MC |
1627 | && ((r_type != R_ARC_PC32 && r_type != R_ARC_32_PCREL) |
1628 | || (h != NULL | |
34e967a5 MC |
1629 | && (!info->symbolic || !h->def_regular)))) |
1630 | { | |
1631 | if (sreloc == NULL) | |
1632 | { | |
1633 | sreloc = _bfd_elf_make_dynamic_reloc_section (sec, dynobj, | |
1634 | 2, abfd, | |
1635 | /*rela*/ | |
1636 | TRUE); | |
1637 | ||
1638 | if (sreloc == NULL) | |
1639 | return FALSE; | |
1640 | } | |
1641 | sreloc->size += sizeof (Elf32_External_Rela); | |
1642 | ||
1643 | } | |
1644 | default: | |
1645 | break; | |
1646 | } | |
1647 | ||
886a2506 NC |
1648 | if (is_reloc_for_PLT (howto) == TRUE) |
1649 | { | |
1650 | if (h == NULL) | |
1651 | continue; | |
1652 | else | |
1653 | h->needs_plt = 1; | |
1654 | } | |
1655 | ||
08759e0f CM |
1656 | /* Add info to the symbol got_entry_list. */ |
1657 | if (is_reloc_for_GOT (howto) == TRUE | |
1658 | || is_reloc_for_TLS (howto) == TRUE) | |
34e967a5 | 1659 | { |
08759e0f CM |
1660 | arc_fill_got_info_for_reloc ( |
1661 | arc_got_entry_type_for_reloc (howto), | |
1662 | get_got_entry_list_for_symbol (abfd, r_symndx, h), | |
1663 | info, | |
1664 | h); | |
34e967a5 MC |
1665 | } |
1666 | } | |
886a2506 | 1667 | |
34e967a5 MC |
1668 | return TRUE; |
1669 | } | |
886a2506 | 1670 | |
34e967a5 | 1671 | #define ELF_DYNAMIC_INTERPRETER "/sbin/ld-uClibc.so" |
886a2506 | 1672 | |
34e967a5 MC |
1673 | static struct plt_version_t * |
1674 | arc_get_plt_version (struct bfd_link_info *info) | |
886a2506 | 1675 | { |
34e967a5 | 1676 | int i; |
886a2506 | 1677 | |
34e967a5 MC |
1678 | for (i = 0; i < 1; i++) |
1679 | { | |
1680 | ARC_DEBUG ("%d: size1 = %d, size2 = %d\n", i, | |
f7e8b360 NC |
1681 | (int) plt_versions[i].entry_size, |
1682 | (int) plt_versions[i].elem_size); | |
34e967a5 | 1683 | } |
886a2506 | 1684 | |
34e967a5 | 1685 | if (bfd_get_mach (info->output_bfd) == bfd_mach_arc_arcv2) |
886a2506 | 1686 | { |
34e967a5 MC |
1687 | if (bfd_link_pic (info)) |
1688 | return &(plt_versions[ELF_ARCV2_PIC]); | |
1689 | else | |
1690 | return &(plt_versions[ELF_ARCV2_ABS]); | |
1691 | } | |
1692 | else | |
886a2506 | 1693 | { |
34e967a5 MC |
1694 | if (bfd_link_pic (info)) |
1695 | return &(plt_versions[ELF_ARC_PIC]); | |
1696 | else | |
1697 | return &(plt_versions[ELF_ARC_ABS]); | |
886a2506 | 1698 | } |
886a2506 NC |
1699 | } |
1700 | ||
1701 | static bfd_vma | |
1702 | add_symbol_to_plt (struct bfd_link_info *info) | |
1703 | { | |
34e967a5 | 1704 | struct elf_link_hash_table *htab = elf_hash_table (info); |
886a2506 NC |
1705 | bfd_vma ret; |
1706 | ||
34e967a5 | 1707 | struct plt_version_t *plt_data = arc_get_plt_version (info); |
886a2506 | 1708 | |
34e967a5 MC |
1709 | /* If this is the first .plt entry, make room for the special first |
1710 | entry. */ | |
1711 | if (htab->splt->size == 0) | |
1712 | htab->splt->size += plt_data->entry_size; | |
886a2506 | 1713 | |
34e967a5 MC |
1714 | ret = htab->splt->size; |
1715 | ||
1716 | htab->splt->size += plt_data->elem_size; | |
f7e8b360 | 1717 | ARC_DEBUG ("PLT_SIZE = %d\n", (int) htab->splt->size); |
34e967a5 MC |
1718 | |
1719 | htab->sgotplt->size += 4; | |
1720 | htab->srelplt->size += sizeof (Elf32_External_Rela); | |
886a2506 NC |
1721 | |
1722 | return ret; | |
1723 | } | |
1724 | ||
34e967a5 MC |
1725 | #define PLT_DO_RELOCS_FOR_ENTRY(ABFD, DS, RELOCS) \ |
1726 | plt_do_relocs_for_symbol (ABFD, DS, RELOCS, 0, 0) | |
886a2506 NC |
1727 | |
1728 | static void | |
34e967a5 MC |
1729 | plt_do_relocs_for_symbol (bfd *abfd, |
1730 | struct elf_link_hash_table *htab, | |
1731 | const struct plt_reloc *reloc, | |
886a2506 NC |
1732 | bfd_vma plt_offset, |
1733 | bfd_vma symbol_got_offset) | |
1734 | { | |
1735 | while (SYM_ONLY (reloc->symbol) != LAST_RELOC) | |
1736 | { | |
1737 | bfd_vma relocation = 0; | |
1738 | ||
1739 | switch (SYM_ONLY (reloc->symbol)) | |
1740 | { | |
1741 | case SGOT: | |
08759e0f CM |
1742 | relocation |
1743 | = htab->sgotplt->output_section->vma | |
1744 | + htab->sgotplt->output_offset + symbol_got_offset; | |
886a2506 NC |
1745 | break; |
1746 | } | |
1747 | relocation += reloc->addend; | |
1748 | ||
34e967a5 MC |
1749 | if (IS_RELATIVE (reloc->symbol)) |
1750 | { | |
1751 | bfd_vma reloc_offset = reloc->offset; | |
1752 | reloc_offset -= (IS_INSN_32 (reloc->symbol)) ? 4 : 0; | |
1753 | reloc_offset -= (IS_INSN_24 (reloc->symbol)) ? 2 : 0; | |
886a2506 | 1754 | |
34e967a5 MC |
1755 | relocation -= htab->splt->output_section->vma |
1756 | + htab->splt->output_offset | |
1757 | + plt_offset + reloc_offset; | |
1758 | } | |
1759 | ||
1760 | /* TODO: being ME is not a property of the relocation but of the | |
1761 | section of which is applying the relocation. */ | |
1e5885b7 | 1762 | if (IS_MIDDLE_ENDIAN (reloc->symbol) && !bfd_big_endian (abfd)) |
886a2506 | 1763 | { |
08759e0f CM |
1764 | relocation |
1765 | = ((relocation & 0xffff0000) >> 16) | |
1766 | | ((relocation & 0xffff) << 16); | |
886a2506 NC |
1767 | } |
1768 | ||
1769 | switch (reloc->size) | |
1770 | { | |
1771 | case 32: | |
34e967a5 | 1772 | bfd_put_32 (htab->splt->output_section->owner, |
886a2506 | 1773 | relocation, |
34e967a5 | 1774 | htab->splt->contents + plt_offset + reloc->offset); |
886a2506 NC |
1775 | break; |
1776 | } | |
1777 | ||
34e967a5 | 1778 | reloc = &(reloc[1]); /* Jump to next relocation. */ |
886a2506 NC |
1779 | } |
1780 | } | |
1781 | ||
1782 | static void | |
34e967a5 MC |
1783 | relocate_plt_for_symbol (bfd *output_bfd, |
1784 | struct bfd_link_info *info, | |
886a2506 NC |
1785 | struct elf_link_hash_entry *h) |
1786 | { | |
34e967a5 MC |
1787 | struct plt_version_t *plt_data = arc_get_plt_version (info); |
1788 | struct elf_link_hash_table *htab = elf_hash_table (info); | |
886a2506 | 1789 | |
34e967a5 MC |
1790 | bfd_vma plt_index = (h->plt.offset - plt_data->entry_size) |
1791 | / plt_data->elem_size; | |
886a2506 NC |
1792 | bfd_vma got_offset = (plt_index + 3) * 4; |
1793 | ||
f7e8b360 NC |
1794 | ARC_DEBUG ("arc_info: PLT_OFFSET = %#lx, PLT_ENTRY_VMA = %#lx, \ |
1795 | GOT_ENTRY_OFFSET = %#lx, GOT_ENTRY_VMA = %#lx, for symbol %s\n", | |
1796 | (long) h->plt.offset, | |
1797 | (long) (htab->splt->output_section->vma | |
1798 | + htab->splt->output_offset | |
1799 | + h->plt.offset), | |
1800 | (long) got_offset, | |
1801 | (long) (htab->sgotplt->output_section->vma | |
1802 | + htab->sgotplt->output_offset | |
1803 | + got_offset), | |
34e967a5 MC |
1804 | h->root.root.string); |
1805 | ||
1e5885b7 CZ |
1806 | { |
1807 | bfd_vma i = 0; | |
1808 | uint16_t *ptr = (uint16_t *) plt_data->elem; | |
f7e8b360 | 1809 | |
1e5885b7 CZ |
1810 | for (i = 0; i < plt_data->elem_size/2; i++) |
1811 | { | |
1812 | uint16_t data = ptr[i]; | |
1813 | bfd_put_16 (output_bfd, | |
1814 | (bfd_vma) data, | |
1815 | htab->splt->contents + h->plt.offset + (i*2)); | |
1816 | } | |
1817 | } | |
1818 | ||
34e967a5 MC |
1819 | plt_do_relocs_for_symbol (output_bfd, htab, |
1820 | plt_data->elem_relocs, | |
1821 | h->plt.offset, | |
886a2506 | 1822 | got_offset); |
34e967a5 MC |
1823 | |
1824 | /* Fill in the entry in the global offset table. */ | |
1825 | bfd_put_32 (output_bfd, | |
1826 | (bfd_vma) (htab->splt->output_section->vma | |
1827 | + htab->splt->output_offset), | |
1828 | htab->sgotplt->contents + got_offset); | |
1829 | ||
1830 | /* TODO: Fill in the entry in the .rela.plt section. */ | |
1831 | { | |
1832 | Elf_Internal_Rela rel; | |
1833 | bfd_byte *loc; | |
1834 | ||
1835 | rel.r_offset = (htab->sgotplt->output_section->vma | |
1836 | + htab->sgotplt->output_offset | |
1837 | + got_offset); | |
1838 | rel.r_addend = 0; | |
94e5c971 CZ |
1839 | |
1840 | BFD_ASSERT (h->dynindx != -1); | |
34e967a5 MC |
1841 | rel.r_info = ELF32_R_INFO (h->dynindx, R_ARC_JMP_SLOT); |
1842 | ||
1843 | loc = htab->srelplt->contents; | |
1844 | loc += plt_index * sizeof (Elf32_External_Rela); /* relA */ | |
1845 | bfd_elf32_swap_reloca_out (output_bfd, &rel, loc); | |
1846 | } | |
886a2506 NC |
1847 | } |
1848 | ||
1849 | static void | |
34e967a5 MC |
1850 | relocate_plt_for_entry (bfd *abfd, |
1851 | struct bfd_link_info *info) | |
886a2506 | 1852 | { |
34e967a5 MC |
1853 | struct plt_version_t *plt_data = arc_get_plt_version (info); |
1854 | struct elf_link_hash_table *htab = elf_hash_table (info); | |
886a2506 | 1855 | |
1e5885b7 CZ |
1856 | { |
1857 | bfd_vma i = 0; | |
1858 | uint16_t *ptr = (uint16_t *) plt_data->entry; | |
1859 | for (i = 0; i < plt_data->entry_size/2; i++) | |
1860 | { | |
1861 | uint16_t data = ptr[i]; | |
1862 | bfd_put_16 (abfd, | |
1863 | (bfd_vma) data, | |
1864 | htab->splt->contents + (i*2)); | |
1865 | } | |
1866 | } | |
34e967a5 | 1867 | PLT_DO_RELOCS_FOR_ENTRY (abfd, htab, plt_data->entry_relocs); |
886a2506 NC |
1868 | } |
1869 | ||
34e967a5 MC |
1870 | /* Desc : Adjust a symbol defined by a dynamic object and referenced |
1871 | by a regular object. The current definition is in some section of | |
1872 | the dynamic object, but we're not including those sections. We | |
1873 | have to change the definition to something the rest of the link can | |
886a2506 NC |
1874 | understand. */ |
1875 | ||
1876 | static bfd_boolean | |
1877 | elf_arc_adjust_dynamic_symbol (struct bfd_link_info *info, | |
1878 | struct elf_link_hash_entry *h) | |
1879 | { | |
34e967a5 | 1880 | asection *s; |
886a2506 | 1881 | bfd *dynobj = (elf_hash_table (info))->dynobj; |
34e967a5 | 1882 | struct elf_link_hash_table *htab = elf_hash_table (info); |
886a2506 | 1883 | |
34e967a5 MC |
1884 | if (h->type == STT_FUNC |
1885 | || h->type == STT_GNU_IFUNC | |
1886 | || h->needs_plt == 1) | |
886a2506 NC |
1887 | { |
1888 | if (!bfd_link_pic (info) && !h->def_dynamic && !h->ref_dynamic) | |
1889 | { | |
1890 | /* This case can occur if we saw a PLT32 reloc in an input | |
1891 | file, but the symbol was never referred to by a dynamic | |
1892 | object. In such a case, we don't actually need to build | |
1893 | a procedure linkage table, and we can just do a PC32 | |
1894 | reloc instead. */ | |
1895 | BFD_ASSERT (h->needs_plt); | |
1896 | return TRUE; | |
1897 | } | |
1898 | ||
1899 | /* Make sure this symbol is output as a dynamic symbol. */ | |
1900 | if (h->dynindx == -1 && !h->forced_local | |
1901 | && !bfd_elf_link_record_dynamic_symbol (info, h)) | |
1902 | return FALSE; | |
1903 | ||
34e967a5 MC |
1904 | if (bfd_link_pic (info) |
1905 | || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h)) | |
886a2506 NC |
1906 | { |
1907 | bfd_vma loc = add_symbol_to_plt (info); | |
1908 | ||
08759e0f | 1909 | if (bfd_link_executable (info) && !h->def_regular) |
886a2506 | 1910 | { |
34e967a5 | 1911 | h->root.u.def.section = htab->splt; |
886a2506 NC |
1912 | h->root.u.def.value = loc; |
1913 | } | |
1914 | h->plt.offset = loc; | |
1915 | } | |
34e967a5 MC |
1916 | else |
1917 | { | |
1918 | h->plt.offset = (bfd_vma) -1; | |
1919 | h->needs_plt = 0; | |
1920 | } | |
1921 | return TRUE; | |
886a2506 | 1922 | } |
34e967a5 MC |
1923 | |
1924 | /* If this is a weak symbol, and there is a real definition, the | |
1925 | processor independent code will have arranged for us to see the | |
1926 | real definition first, and we can just use the same value. */ | |
1927 | if (h->u.weakdef != NULL) | |
886a2506 | 1928 | { |
34e967a5 MC |
1929 | BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined |
1930 | || h->u.weakdef->root.type == bfd_link_hash_defweak); | |
1931 | h->root.u.def.section = h->u.weakdef->root.u.def.section; | |
1932 | h->root.u.def.value = h->u.weakdef->root.u.def.value; | |
1933 | return TRUE; | |
886a2506 NC |
1934 | } |
1935 | ||
34e967a5 MC |
1936 | /* This is a reference to a symbol defined by a dynamic object which |
1937 | is not a function. */ | |
1938 | ||
1939 | /* If we are creating a shared library, we must presume that the | |
1940 | only references to the symbol are via the global offset table. | |
1941 | For such cases we need not do anything here; the relocations will | |
1942 | be handled correctly by relocate_section. */ | |
3c8adaca CZ |
1943 | if (!bfd_link_executable (info)) |
1944 | return TRUE; | |
1945 | ||
1946 | /* If there are no non-GOT references, we do not need a copy | |
1947 | relocation. */ | |
1948 | if (!h->non_got_ref) | |
34e967a5 MC |
1949 | return TRUE; |
1950 | ||
3c8adaca CZ |
1951 | /* If -z nocopyreloc was given, we won't generate them either. */ |
1952 | if (info->nocopyreloc) | |
1953 | { | |
1954 | h->non_got_ref = 0; | |
1955 | return TRUE; | |
1956 | } | |
1957 | ||
34e967a5 MC |
1958 | /* We must allocate the symbol in our .dynbss section, which will |
1959 | become part of the .bss section of the executable. There will be | |
1960 | an entry for this symbol in the .dynsym section. The dynamic | |
1961 | object will contain position independent code, so all references | |
1962 | from the dynamic object to this symbol will go through the global | |
1963 | offset table. The dynamic linker will use the .dynsym entry to | |
1964 | determine the address it must put in the global offset table, so | |
1965 | both the dynamic object and the regular object will refer to the | |
1966 | same memory location for the variable. */ | |
1967 | ||
3c8adaca CZ |
1968 | if (htab == NULL) |
1969 | return FALSE; | |
34e967a5 MC |
1970 | |
1971 | /* We must generate a R_ARC_COPY reloc to tell the dynamic linker to | |
1972 | copy the initial value out of the dynamic object and into the | |
1973 | runtime process image. We need to remember the offset into the | |
1974 | .rela.bss section we are going to use. */ | |
1975 | if ((h->root.u.def.section->flags & SEC_ALLOC) != 0) | |
1976 | { | |
8a36df4d | 1977 | struct elf_arc_link_hash_table *arc_htab = elf_arc_hash_table (info); |
34e967a5 | 1978 | |
9d19e4fd AM |
1979 | BFD_ASSERT (arc_htab->elf.srelbss != NULL); |
1980 | arc_htab->elf.srelbss->size += sizeof (Elf32_External_Rela); | |
34e967a5 MC |
1981 | h->needs_copy = 1; |
1982 | } | |
1983 | ||
8a36df4d | 1984 | /* TODO: Move this also to arc_hash_table. */ |
3c8adaca CZ |
1985 | s = bfd_get_section_by_name (dynobj, ".dynbss"); |
1986 | BFD_ASSERT (s != NULL); | |
34e967a5 | 1987 | |
3c8adaca | 1988 | return _bfd_elf_adjust_dynamic_copy (info, h, s); |
886a2506 NC |
1989 | } |
1990 | ||
1991 | /* Function : elf_arc_finish_dynamic_symbol | |
1992 | Brief : Finish up dynamic symbol handling. We set the | |
34e967a5 | 1993 | contents of various dynamic sections here. |
886a2506 | 1994 | Args : output_bfd : |
34e967a5 MC |
1995 | info : |
1996 | h : | |
1997 | sym : | |
886a2506 | 1998 | Returns : True/False as the return status. */ |
34e967a5 | 1999 | |
886a2506 NC |
2000 | static bfd_boolean |
2001 | elf_arc_finish_dynamic_symbol (bfd * output_bfd, | |
2002 | struct bfd_link_info *info, | |
2003 | struct elf_link_hash_entry *h, | |
2004 | Elf_Internal_Sym * sym) | |
2005 | { | |
34e967a5 | 2006 | if (h->plt.offset != (bfd_vma) -1) |
886a2506 | 2007 | { |
34e967a5 MC |
2008 | relocate_plt_for_symbol (output_bfd, info, h); |
2009 | ||
2010 | if (!h->def_regular) | |
886a2506 | 2011 | { |
34e967a5 MC |
2012 | /* Mark the symbol as undefined, rather than as defined in |
2013 | the .plt section. Leave the value alone. */ | |
2014 | sym->st_shndx = SHN_UNDEF; | |
886a2506 | 2015 | } |
34e967a5 MC |
2016 | } |
2017 | ||
34e967a5 | 2018 | |
08759e0f CM |
2019 | /* This function traverses list of GOT entries and |
2020 | create respective dynamic relocs. */ | |
2021 | /* TODO: Make function to get list and not access the list directly. */ | |
2022 | /* TODO: Move function to relocate_section create this relocs eagerly. */ | |
2023 | create_got_dynrelocs_for_got_info (&h->got.glist, | |
2024 | output_bfd, | |
2025 | info, | |
2026 | h); | |
34e967a5 MC |
2027 | |
2028 | if (h->needs_copy) | |
2029 | { | |
8a36df4d CM |
2030 | struct elf_arc_link_hash_table *arc_htab = elf_arc_hash_table (info); |
2031 | ||
2032 | if (h->dynindx == -1 | |
2033 | || (h->root.type != bfd_link_hash_defined | |
2034 | && h->root.type != bfd_link_hash_defweak) | |
9d19e4fd | 2035 | || arc_htab->elf.srelbss == NULL) |
8a36df4d CM |
2036 | abort (); |
2037 | ||
34e967a5 MC |
2038 | bfd_vma rel_offset = (h->root.u.def.value |
2039 | + h->root.u.def.section->output_section->vma | |
2040 | + h->root.u.def.section->output_offset); | |
2041 | ||
9d19e4fd AM |
2042 | bfd_byte * loc = arc_htab->elf.srelbss->contents |
2043 | + (arc_htab->elf.srelbss->reloc_count * sizeof (Elf32_External_Rela)); | |
2044 | arc_htab->elf.srelbss->reloc_count++; | |
34e967a5 MC |
2045 | |
2046 | Elf_Internal_Rela rel; | |
2047 | rel.r_addend = 0; | |
2048 | rel.r_offset = rel_offset; | |
94e5c971 CZ |
2049 | |
2050 | BFD_ASSERT (h->dynindx != -1); | |
34e967a5 MC |
2051 | rel.r_info = ELF32_R_INFO (h->dynindx, R_ARC_COPY); |
2052 | ||
23a42089 | 2053 | bfd_elf32_swap_reloca_out (output_bfd, &rel, loc); |
886a2506 NC |
2054 | } |
2055 | ||
2056 | /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */ | |
2057 | if (strcmp (h->root.root.string, "_DYNAMIC") == 0 | |
2058 | || strcmp (h->root.root.string, "__DYNAMIC") == 0 | |
2059 | || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0) | |
2060 | sym->st_shndx = SHN_ABS; | |
2061 | ||
2062 | return TRUE; | |
2063 | } | |
2064 | ||
4ade44b7 | 2065 | #define GET_SYMBOL_OR_SECTION(TAG, SYMBOL, SECTION) \ |
34e967a5 MC |
2066 | case TAG: \ |
2067 | if (SYMBOL != NULL) \ | |
4ade44b7 AM |
2068 | h = elf_link_hash_lookup (elf_hash_table (info), \ |
2069 | SYMBOL, FALSE, FALSE, TRUE); \ | |
34e967a5 | 2070 | else if (SECTION != NULL) \ |
4ade44b7 | 2071 | s = bfd_get_linker_section (dynobj, SECTION); \ |
34e967a5 | 2072 | break; |
886a2506 NC |
2073 | |
2074 | /* Function : elf_arc_finish_dynamic_sections | |
2075 | Brief : Finish up the dynamic sections handling. | |
2076 | Args : output_bfd : | |
34e967a5 MC |
2077 | info : |
2078 | h : | |
2079 | sym : | |
886a2506 | 2080 | Returns : True/False as the return status. */ |
34e967a5 | 2081 | |
886a2506 | 2082 | static bfd_boolean |
34e967a5 MC |
2083 | elf_arc_finish_dynamic_sections (bfd * output_bfd, |
2084 | struct bfd_link_info *info) | |
886a2506 | 2085 | { |
34e967a5 | 2086 | struct elf_link_hash_table *htab = elf_hash_table (info); |
886a2506 | 2087 | bfd *dynobj = (elf_hash_table (info))->dynobj; |
034fed0b | 2088 | asection *sdyn = bfd_get_linker_section (dynobj, ".dynamic"); |
886a2506 | 2089 | |
034fed0b | 2090 | if (sdyn) |
886a2506 NC |
2091 | { |
2092 | Elf32_External_Dyn *dyncon, *dynconend; | |
2093 | ||
034fed0b | 2094 | dyncon = (Elf32_External_Dyn *) sdyn->contents; |
08759e0f | 2095 | dynconend |
034fed0b | 2096 | = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size); |
886a2506 NC |
2097 | for (; dyncon < dynconend; dyncon++) |
2098 | { | |
2099 | Elf_Internal_Dyn internal_dyn; | |
2100 | bfd_boolean do_it = FALSE; | |
2101 | ||
2102 | struct elf_link_hash_entry *h = NULL; | |
2103 | asection *s = NULL; | |
2104 | ||
2105 | bfd_elf32_swap_dyn_in (dynobj, dyncon, &internal_dyn); | |
2106 | ||
2107 | switch (internal_dyn.d_tag) | |
2108 | { | |
65b94e90 CM |
2109 | GET_SYMBOL_OR_SECTION (DT_INIT, info->init_function, NULL) |
2110 | GET_SYMBOL_OR_SECTION (DT_FINI, info->fini_function, NULL) | |
4ade44b7 AM |
2111 | GET_SYMBOL_OR_SECTION (DT_PLTGOT, NULL, ".plt") |
2112 | GET_SYMBOL_OR_SECTION (DT_JMPREL, NULL, ".rela.plt") | |
2113 | GET_SYMBOL_OR_SECTION (DT_PLTRELSZ, NULL, ".rela.plt") | |
4ade44b7 AM |
2114 | GET_SYMBOL_OR_SECTION (DT_VERSYM, NULL, ".gnu.version") |
2115 | GET_SYMBOL_OR_SECTION (DT_VERDEF, NULL, ".gnu.version_d") | |
2116 | GET_SYMBOL_OR_SECTION (DT_VERNEED, NULL, ".gnu.version_r") | |
886a2506 NC |
2117 | default: |
2118 | break; | |
2119 | } | |
2120 | ||
34e967a5 | 2121 | /* In case the dynamic symbols should be updated with a symbol. */ |
886a2506 NC |
2122 | if (h != NULL |
2123 | && (h->root.type == bfd_link_hash_defined | |
34e967a5 | 2124 | || h->root.type == bfd_link_hash_defweak)) |
886a2506 NC |
2125 | { |
2126 | asection *asec_ptr; | |
2127 | ||
2128 | internal_dyn.d_un.d_val = h->root.u.def.value; | |
2129 | asec_ptr = h->root.u.def.section; | |
2130 | if (asec_ptr->output_section != NULL) | |
2131 | { | |
2132 | internal_dyn.d_un.d_val += | |
08759e0f CM |
2133 | (asec_ptr->output_section->vma |
2134 | + asec_ptr->output_offset); | |
886a2506 NC |
2135 | } |
2136 | else | |
2137 | { | |
34e967a5 MC |
2138 | /* The symbol is imported from another shared |
2139 | library and does not apply to this one. */ | |
886a2506 NC |
2140 | internal_dyn.d_un.d_val = 0; |
2141 | } | |
2142 | do_it = TRUE; | |
2143 | } | |
2144 | else if (s != NULL) /* With a section information. */ | |
2145 | { | |
2146 | switch (internal_dyn.d_tag) | |
2147 | { | |
2148 | case DT_PLTGOT: | |
2149 | case DT_JMPREL: | |
34e967a5 MC |
2150 | case DT_VERSYM: |
2151 | case DT_VERDEF: | |
2152 | case DT_VERNEED: | |
4ade44b7 AM |
2153 | internal_dyn.d_un.d_ptr = (s->output_section->vma |
2154 | + s->output_offset); | |
886a2506 NC |
2155 | do_it = TRUE; |
2156 | break; | |
2157 | ||
2158 | case DT_PLTRELSZ: | |
2159 | internal_dyn.d_un.d_val = s->size; | |
2160 | do_it = TRUE; | |
2161 | break; | |
2162 | ||
886a2506 NC |
2163 | default: |
2164 | break; | |
2165 | } | |
2166 | } | |
2167 | ||
4ade44b7 | 2168 | if (do_it) |
886a2506 NC |
2169 | bfd_elf32_swap_dyn_out (output_bfd, &internal_dyn, dyncon); |
2170 | } | |
2171 | ||
34e967a5 | 2172 | if (htab->splt->size > 0) |
886a2506 | 2173 | { |
34e967a5 | 2174 | relocate_plt_for_entry (output_bfd, info); |
886a2506 NC |
2175 | } |
2176 | ||
34e967a5 | 2177 | /* TODO: Validate this. */ |
034fed0b AM |
2178 | if (htab->srelplt->output_section != bfd_abs_section_ptr) |
2179 | elf_section_data (htab->srelplt->output_section) | |
2180 | ->this_hdr.sh_entsize = 12; | |
886a2506 NC |
2181 | } |
2182 | ||
2183 | /* Fill in the first three entries in the global offset table. */ | |
34e967a5 | 2184 | if (htab->sgot) |
886a2506 | 2185 | { |
3b63d2ce CM |
2186 | struct elf_link_hash_entry *h; |
2187 | h = elf_link_hash_lookup (elf_hash_table (info), "_GLOBAL_OFFSET_TABLE_", | |
2188 | FALSE, FALSE, TRUE); | |
2189 | ||
2190 | if (h != NULL && h->root.type != bfd_link_hash_undefined | |
2191 | && h->root.u.def.section != NULL) | |
886a2506 | 2192 | { |
3b63d2ce CM |
2193 | asection *sec = h->root.u.def.section; |
2194 | ||
034fed0b | 2195 | if (sdyn == NULL) |
886a2506 | 2196 | bfd_put_32 (output_bfd, (bfd_vma) 0, |
3b63d2ce | 2197 | sec->contents); |
886a2506 NC |
2198 | else |
2199 | bfd_put_32 (output_bfd, | |
034fed0b | 2200 | sdyn->output_section->vma + sdyn->output_offset, |
3b63d2ce CM |
2201 | sec->contents); |
2202 | bfd_put_32 (output_bfd, (bfd_vma) 0, sec->contents + 4); | |
2203 | bfd_put_32 (output_bfd, (bfd_vma) 0, sec->contents + 8); | |
886a2506 NC |
2204 | } |
2205 | } | |
2206 | ||
886a2506 NC |
2207 | return TRUE; |
2208 | } | |
2209 | ||
34e967a5 MC |
2210 | #define ADD_DYNAMIC_SYMBOL(NAME, TAG) \ |
2211 | h = elf_link_hash_lookup (elf_hash_table (info), \ | |
2212 | NAME, FALSE, FALSE, FALSE); \ | |
2213 | if ((h != NULL && (h->ref_regular || h->def_regular))) \ | |
2214 | if (! _bfd_elf_add_dynamic_entry (info, TAG, 0)) \ | |
886a2506 NC |
2215 | return FALSE; |
2216 | ||
2217 | /* Set the sizes of the dynamic sections. */ | |
2218 | static bfd_boolean | |
034fed0b | 2219 | elf_arc_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED, |
34e967a5 | 2220 | struct bfd_link_info *info) |
886a2506 | 2221 | { |
034fed0b AM |
2222 | bfd *dynobj; |
2223 | asection *s; | |
2224 | bfd_boolean relocs_exist = FALSE; | |
2225 | bfd_boolean reltext_exist = FALSE; | |
34e967a5 | 2226 | struct elf_link_hash_table *htab = elf_hash_table (info); |
886a2506 | 2227 | |
034fed0b | 2228 | dynobj = htab->dynobj; |
886a2506 NC |
2229 | BFD_ASSERT (dynobj != NULL); |
2230 | ||
034fed0b | 2231 | if (htab->dynamic_sections_created) |
886a2506 NC |
2232 | { |
2233 | struct elf_link_hash_entry *h; | |
2234 | ||
34e967a5 MC |
2235 | /* Set the contents of the .interp section to the |
2236 | interpreter. */ | |
034fed0b | 2237 | if (bfd_link_executable (info) && !info->nointerp) |
886a2506 NC |
2238 | { |
2239 | s = bfd_get_section_by_name (dynobj, ".interp"); | |
2240 | BFD_ASSERT (s != NULL); | |
34e967a5 | 2241 | s->size = sizeof (ELF_DYNAMIC_INTERPRETER); |
886a2506 NC |
2242 | s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER; |
2243 | } | |
2244 | ||
34e967a5 MC |
2245 | /* Add some entries to the .dynamic section. We fill in some of |
2246 | the values later, in elf_bfd_final_link, but we must add the | |
2247 | entries now so that we know the final size of the .dynamic | |
2248 | section. Checking if the .init section is present. We also | |
2249 | create DT_INIT and DT_FINI entries if the init_str has been | |
2250 | changed by the user. */ | |
65b94e90 CM |
2251 | ADD_DYNAMIC_SYMBOL (info->init_function, DT_INIT); |
2252 | ADD_DYNAMIC_SYMBOL (info->fini_function, DT_FINI); | |
886a2506 NC |
2253 | } |
2254 | else | |
2255 | { | |
34e967a5 MC |
2256 | /* We may have created entries in the .rela.got section. |
2257 | However, if we are not creating the dynamic sections, we will | |
2258 | not actually use these entries. Reset the size of .rela.got, | |
2259 | which will cause it to get stripped from the output file | |
2260 | below. */ | |
2261 | if (htab->srelgot != NULL) | |
2262 | htab->srelgot->size = 0; | |
886a2506 NC |
2263 | } |
2264 | ||
2265 | for (s = dynobj->sections; s != NULL; s = s->next) | |
2266 | { | |
34e967a5 | 2267 | if ((s->flags & SEC_LINKER_CREATED) == 0) |
886a2506 NC |
2268 | continue; |
2269 | ||
034fed0b AM |
2270 | if (s == htab->splt |
2271 | || s == htab->sgot | |
2272 | || s == htab->sgotplt | |
2273 | || s == htab->sdynbss) | |
886a2506 | 2274 | { |
034fed0b AM |
2275 | /* Strip this section if we don't need it. */ |
2276 | } | |
2277 | else if (strncmp (s->name, ".rela", 5) == 0) | |
2278 | { | |
2279 | if (s->size != 0 && s != htab->srelplt) | |
34e967a5 | 2280 | { |
034fed0b | 2281 | if (!reltext_exist) |
34e967a5 | 2282 | { |
034fed0b AM |
2283 | const char *name = s->name + 5; |
2284 | bfd *ibfd; | |
2285 | for (ibfd = info->input_bfds; ibfd; ibfd = ibfd->link.next) | |
2286 | if (bfd_get_flavour (ibfd) == bfd_target_elf_flavour) | |
2287 | { | |
2288 | asection *target = bfd_get_section_by_name (ibfd, name); | |
2289 | if (target != NULL | |
2290 | && elf_section_data (target)->sreloc == s | |
2291 | && ((target->output_section->flags | |
2292 | & (SEC_READONLY | SEC_ALLOC)) | |
2293 | == (SEC_READONLY | SEC_ALLOC))) | |
2294 | { | |
2295 | reltext_exist = TRUE; | |
2296 | break; | |
2297 | } | |
2298 | } | |
34e967a5 | 2299 | } |
034fed0b | 2300 | relocs_exist = TRUE; |
34e967a5 | 2301 | } |
886a2506 | 2302 | |
34e967a5 MC |
2303 | /* We use the reloc_count field as a counter if we need to |
2304 | copy relocs into the output file. */ | |
2305 | s->reloc_count = 0; | |
886a2506 | 2306 | } |
034fed0b AM |
2307 | else |
2308 | { | |
2309 | /* It's not one of our sections, so don't allocate space. */ | |
2310 | continue; | |
2311 | } | |
34e967a5 | 2312 | |
034fed0b AM |
2313 | if (s->size == 0) |
2314 | { | |
2315 | s->flags |= SEC_EXCLUDE; | |
2316 | continue; | |
2317 | } | |
34e967a5 | 2318 | |
034fed0b AM |
2319 | if ((s->flags & SEC_HAS_CONTENTS) == 0) |
2320 | continue; | |
34e967a5 | 2321 | |
034fed0b AM |
2322 | /* Allocate memory for the section contents. */ |
2323 | s->contents = bfd_zalloc (dynobj, s->size); | |
2324 | if (s->contents == NULL) | |
34e967a5 | 2325 | return FALSE; |
886a2506 NC |
2326 | } |
2327 | ||
034fed0b | 2328 | if (htab->dynamic_sections_created) |
886a2506 | 2329 | { |
34e967a5 MC |
2330 | /* TODO: Check if this is needed. */ |
2331 | if (!bfd_link_pic (info)) | |
2332 | if (!_bfd_elf_add_dynamic_entry (info, DT_DEBUG, 0)) | |
2333 | return FALSE; | |
2334 | ||
2335 | if (htab->splt && (htab->splt->flags & SEC_EXCLUDE) == 0) | |
886a2506 NC |
2336 | if (!_bfd_elf_add_dynamic_entry (info, DT_PLTGOT, 0) |
2337 | || !_bfd_elf_add_dynamic_entry (info, DT_PLTRELSZ, 0) | |
2338 | || !_bfd_elf_add_dynamic_entry (info, DT_PLTREL, DT_RELA) | |
034fed0b | 2339 | || !_bfd_elf_add_dynamic_entry (info, DT_JMPREL, 0)) |
886a2506 NC |
2340 | return FALSE; |
2341 | ||
034fed0b | 2342 | if (relocs_exist) |
886a2506 NC |
2343 | if (!_bfd_elf_add_dynamic_entry (info, DT_RELA, 0) |
2344 | || !_bfd_elf_add_dynamic_entry (info, DT_RELASZ, 0) | |
2ab2f40d | 2345 | || !_bfd_elf_add_dynamic_entry (info, DT_RELAENT, |
034fed0b | 2346 | sizeof (Elf32_External_Rela))) |
886a2506 NC |
2347 | return FALSE; |
2348 | ||
034fed0b | 2349 | if (reltext_exist) |
886a2506 NC |
2350 | if (!_bfd_elf_add_dynamic_entry (info, DT_TEXTREL, 0)) |
2351 | return FALSE; | |
2352 | } | |
2353 | ||
2354 | return TRUE; | |
2355 | } | |
2356 | ||
0f7f3789 CM |
2357 | |
2358 | /* Classify dynamic relocs such that -z combreloc can reorder and combine | |
2359 | them. */ | |
2360 | static enum elf_reloc_type_class | |
2361 | elf32_arc_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED, | |
2362 | const asection *rel_sec ATTRIBUTE_UNUSED, | |
2363 | const Elf_Internal_Rela *rela) | |
2364 | { | |
2365 | switch ((int) ELF32_R_TYPE (rela->r_info)) | |
2366 | { | |
2367 | case R_ARC_RELATIVE: | |
2368 | return reloc_class_relative; | |
2369 | case R_ARC_JMP_SLOT: | |
2370 | return reloc_class_plt; | |
2371 | case R_ARC_COPY: | |
2372 | return reloc_class_copy; | |
2373 | /* TODO: Needed in future to support ifunc. */ | |
2374 | /* | |
2375 | case R_ARC_IRELATIVE: | |
2376 | return reloc_class_ifunc; | |
2377 | */ | |
2378 | default: | |
2379 | return reloc_class_normal; | |
2380 | } | |
2381 | } | |
2382 | ||
34e967a5 MC |
2383 | const struct elf_size_info arc_elf32_size_info = |
2384 | { | |
2385 | sizeof (Elf32_External_Ehdr), | |
2386 | sizeof (Elf32_External_Phdr), | |
2387 | sizeof (Elf32_External_Shdr), | |
2388 | sizeof (Elf32_External_Rel), | |
2389 | sizeof (Elf32_External_Rela), | |
2390 | sizeof (Elf32_External_Sym), | |
2391 | sizeof (Elf32_External_Dyn), | |
2392 | sizeof (Elf_External_Note), | |
2393 | 4, | |
2394 | 1, | |
2395 | 32, 2, | |
2396 | ELFCLASS32, EV_CURRENT, | |
2397 | bfd_elf32_write_out_phdrs, | |
2398 | bfd_elf32_write_shdrs_and_ehdr, | |
2399 | bfd_elf32_checksum_contents, | |
2400 | bfd_elf32_write_relocs, | |
2401 | bfd_elf32_swap_symbol_in, | |
2402 | bfd_elf32_swap_symbol_out, | |
2403 | bfd_elf32_slurp_reloc_table, | |
2404 | bfd_elf32_slurp_symbol_table, | |
2405 | bfd_elf32_swap_dyn_in, | |
2406 | bfd_elf32_swap_dyn_out, | |
2407 | bfd_elf32_swap_reloc_in, | |
2408 | bfd_elf32_swap_reloc_out, | |
2409 | bfd_elf32_swap_reloca_in, | |
2410 | bfd_elf32_swap_reloca_out | |
2411 | }; | |
2412 | ||
2413 | #define elf_backend_size_info arc_elf32_size_info | |
2414 | ||
34e967a5 MC |
2415 | /* Hook called by the linker routine which adds symbols from an object |
2416 | file. */ | |
2417 | ||
2418 | static bfd_boolean | |
2419 | elf_arc_add_symbol_hook (bfd * abfd, | |
2420 | struct bfd_link_info * info, | |
2421 | Elf_Internal_Sym * sym, | |
2422 | const char ** namep ATTRIBUTE_UNUSED, | |
2423 | flagword * flagsp ATTRIBUTE_UNUSED, | |
2424 | asection ** secp ATTRIBUTE_UNUSED, | |
2425 | bfd_vma * valp ATTRIBUTE_UNUSED) | |
2426 | { | |
a43942db | 2427 | if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC |
34e967a5 MC |
2428 | && (abfd->flags & DYNAMIC) == 0 |
2429 | && bfd_get_flavour (info->output_bfd) == bfd_target_elf_flavour) | |
a43942db | 2430 | elf_tdata (info->output_bfd)->has_gnu_symbols |= elf_gnu_symbol_ifunc; |
34e967a5 MC |
2431 | |
2432 | return TRUE; | |
2433 | } | |
886a2506 | 2434 | |
47f7f636 AK |
2435 | /* GDB expects general purpose registers to be in section .reg. However Linux |
2436 | kernel doesn't create this section and instead writes registers to NOTE | |
2437 | section. It is up to the binutils to create a pseudo-section .reg from the | |
2438 | contents of NOTE. Also BFD will read pid and signal number from NOTE. This | |
2439 | function relies on offsets inside elf_prstatus structure in Linux to be | |
2440 | stable. */ | |
2441 | ||
2442 | static bfd_boolean | |
2443 | elf32_arc_grok_prstatus (bfd *abfd, Elf_Internal_Note *note) | |
2444 | { | |
2445 | int offset; | |
2446 | size_t size; | |
2447 | ||
2448 | switch (note->descsz) | |
2449 | { | |
2450 | default: | |
2451 | return FALSE; | |
2452 | ||
2453 | case 236: /* sizeof (struct elf_prstatus) on Linux/arc. */ | |
2454 | /* pr_cursig */ | |
2455 | elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12); | |
2456 | /* pr_pid */ | |
2457 | elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 24); | |
2458 | /* pr_regs */ | |
2459 | offset = 72; | |
2460 | size = (40 * 4); /* There are 40 registers in user_regs_struct. */ | |
2461 | break; | |
2462 | } | |
2463 | /* Make a ".reg/999" section. */ | |
2464 | return _bfd_elfcore_make_pseudosection (abfd, ".reg", size, | |
2465 | note->descpos + offset); | |
2466 | } | |
2467 | ||
6d00b590 | 2468 | #define TARGET_LITTLE_SYM arc_elf32_le_vec |
47b0e7ad | 2469 | #define TARGET_LITTLE_NAME "elf32-littlearc" |
886a2506 NC |
2470 | #define TARGET_BIG_SYM arc_elf32_be_vec |
2471 | #define TARGET_BIG_NAME "elf32-bigarc" | |
2472 | #define ELF_ARCH bfd_arch_arc | |
8a36df4d | 2473 | #define ELF_TARGET_ID ARC_ELF_DATA |
886a2506 NC |
2474 | #define ELF_MACHINE_CODE EM_ARC_COMPACT |
2475 | #define ELF_MACHINE_ALT1 EM_ARC_COMPACT2 | |
2476 | #define ELF_MAXPAGESIZE 0x2000 | |
2477 | ||
34e967a5 MC |
2478 | #define bfd_elf32_bfd_link_hash_table_create arc_elf_link_hash_table_create |
2479 | ||
2480 | #define bfd_elf32_bfd_merge_private_bfd_data arc_elf_merge_private_bfd_data | |
2481 | #define bfd_elf32_bfd_reloc_type_lookup arc_elf32_bfd_reloc_type_lookup | |
2482 | #define bfd_elf32_bfd_set_private_flags arc_elf_set_private_flags | |
2483 | #define bfd_elf32_bfd_print_private_bfd_data arc_elf_print_private_bfd_data | |
2484 | #define bfd_elf32_bfd_copy_private_bfd_data arc_elf_copy_private_bfd_data | |
2485 | ||
886a2506 NC |
2486 | #define elf_info_to_howto_rel arc_info_to_howto_rel |
2487 | #define elf_backend_object_p arc_elf_object_p | |
2488 | #define elf_backend_final_write_processing arc_elf_final_write_processing | |
2489 | ||
2490 | #define elf_backend_relocate_section elf_arc_relocate_section | |
2491 | #define elf_backend_check_relocs elf_arc_check_relocs | |
9d19e4fd | 2492 | #define elf_backend_create_dynamic_sections _bfd_elf_create_dynamic_sections |
886a2506 | 2493 | |
0f7f3789 CM |
2494 | #define elf_backend_reloc_type_class elf32_arc_reloc_type_class |
2495 | ||
886a2506 NC |
2496 | #define elf_backend_adjust_dynamic_symbol elf_arc_adjust_dynamic_symbol |
2497 | #define elf_backend_finish_dynamic_symbol elf_arc_finish_dynamic_symbol | |
2498 | ||
2499 | #define elf_backend_finish_dynamic_sections elf_arc_finish_dynamic_sections | |
2500 | #define elf_backend_size_dynamic_sections elf_arc_size_dynamic_sections | |
08759e0f | 2501 | #define elf_backend_add_symbol_hook elf_arc_add_symbol_hook |
886a2506 NC |
2502 | |
2503 | #define elf_backend_can_gc_sections 1 | |
2504 | #define elf_backend_want_got_plt 1 | |
2505 | #define elf_backend_plt_readonly 1 | |
34e967a5 | 2506 | #define elf_backend_rela_plts_and_copies_p 1 |
886a2506 NC |
2507 | #define elf_backend_want_plt_sym 0 |
2508 | #define elf_backend_got_header_size 12 | |
64f52338 | 2509 | #define elf_backend_dtrel_excludes_plt 1 |
886a2506 NC |
2510 | |
2511 | #define elf_backend_may_use_rel_p 0 | |
2512 | #define elf_backend_may_use_rela_p 1 | |
2513 | #define elf_backend_default_use_rela_p 1 | |
252b5132 | 2514 | |
47f7f636 AK |
2515 | #define elf_backend_grok_prstatus elf32_arc_grok_prstatus |
2516 | ||
3c8adaca CZ |
2517 | #define elf_backend_default_execstack 0 |
2518 | ||
252b5132 | 2519 | #include "elf32-target.h" |