Commit | Line | Data |
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252b5132 | 1 | /* ARC-specific support for 32-bit ELF |
6f2750fe | 2 | Copyright (C) 1994-2016 Free Software Foundation, Inc. |
886a2506 | 3 | Contributed by Cupertino Miranda (cmiranda@synopsys.com). |
252b5132 | 4 | |
0d2bcfaf | 5 | This file is part of BFD, the Binary File Descriptor library. |
252b5132 | 6 | |
0d2bcfaf NC |
7 | This program is free software; you can redistribute it and/or modify |
8 | it under the terms of the GNU General Public License as published by | |
cd123cb7 | 9 | the Free Software Foundation; either version 3 of the License, or |
0d2bcfaf | 10 | (at your option) any later version. |
252b5132 | 11 | |
0d2bcfaf NC |
12 | This program is distributed in the hope that it will be useful, |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
252b5132 | 16 | |
0d2bcfaf NC |
17 | You should have received a copy of the GNU General Public License |
18 | along with this program; if not, write to the Free Software | |
47b0e7ad NC |
19 | Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, |
20 | MA 02110-1301, USA. */ | |
252b5132 | 21 | |
252b5132 | 22 | #include "sysdep.h" |
3db64b00 | 23 | #include "bfd.h" |
252b5132 RH |
24 | #include "libbfd.h" |
25 | #include "elf-bfd.h" | |
26 | #include "elf/arc.h" | |
ea04a8f6 | 27 | #include "libiberty.h" |
886a2506 | 28 | #include "opcode/arc-func.h" |
4b0c052e | 29 | #include "opcode/arc.h" |
34e967a5 | 30 | #include "arc-plt.h" |
886a2506 | 31 | |
34e967a5 MC |
32 | #ifdef DEBUG |
33 | # define PR_DEBUG(fmt, args...) fprintf (stderr, fmt, ##args) | |
34 | #else | |
35 | # define PR_DEBUG(fmt, args...) | |
36 | #endif | |
37 | ||
38 | /* #define ARC_ENABLE_DEBUG 1 */ | |
39 | #ifndef ARC_ENABLE_DEBUG | |
886a2506 | 40 | #define ARC_DEBUG(...) |
34e967a5 MC |
41 | #else |
42 | static char * | |
43 | name_for_global_symbol (struct elf_link_hash_entry *h) | |
44 | { | |
45 | static char *local_str = "(local)"; | |
46 | if (h == NULL) | |
47 | return local_str; | |
48 | else | |
49 | return h->root.root.string; | |
50 | } | |
51 | #define ARC_DEBUG(args...) fprintf (stderr, ##args) | |
52 | #endif | |
53 | ||
54 | ||
55 | #define ADD_RELA(BFD, SECTION, OFFSET, SYM_IDX, TYPE, ADDEND) \ | |
56 | { \ | |
57 | struct elf_link_hash_table *_htab = elf_hash_table (info); \ | |
58 | Elf_Internal_Rela _rel; \ | |
23a42089 | 59 | bfd_byte * _loc; \ |
34e967a5 | 60 | \ |
23a42089 | 61 | _loc = _htab->srel##SECTION->contents \ |
34e967a5 MC |
62 | + ((_htab->srel##SECTION->reloc_count) \ |
63 | * sizeof (Elf32_External_Rela)); \ | |
64 | _htab->srel##SECTION->reloc_count++; \ | |
65 | _rel.r_addend = ADDEND; \ | |
66 | _rel.r_offset = (_htab->s##SECTION)->output_section->vma \ | |
67 | + (_htab->s##SECTION)->output_offset + OFFSET; \ | |
94e5c971 | 68 | BFD_ASSERT ((long) SYM_IDX != -1); \ |
34e967a5 | 69 | _rel.r_info = ELF32_R_INFO (SYM_IDX, TYPE); \ |
23a42089 | 70 | bfd_elf32_swap_reloca_out (BFD, &_rel, _loc); \ |
34e967a5 | 71 | } |
886a2506 NC |
72 | |
73 | struct arc_local_data | |
74 | { | |
75 | bfd_vma sdata_begin_symbol_vma; | |
76 | asection * sdata_output_section; | |
77 | bfd_vma got_symbol_vma; | |
78 | }; | |
79 | ||
80 | struct arc_local_data global_arc_data = | |
81 | { | |
82 | .sdata_begin_symbol_vma = 0, | |
83 | .sdata_output_section = NULL, | |
84 | .got_symbol_vma = 0, | |
85 | }; | |
86 | ||
87 | struct dynamic_sections | |
88 | { | |
89 | bfd_boolean initialized; | |
90 | asection * sgot; | |
91 | asection * srelgot; | |
92 | asection * sgotplt; | |
34e967a5 | 93 | asection * srelgotplt; |
886a2506 NC |
94 | asection * sdyn; |
95 | asection * splt; | |
96 | asection * srelplt; | |
97 | }; | |
98 | ||
886a2506 NC |
99 | enum dyn_section_types |
100 | { | |
101 | got = 0, | |
102 | relgot, | |
103 | gotplt, | |
104 | dyn, | |
105 | plt, | |
106 | relplt, | |
107 | DYN_SECTION_TYPES_END | |
108 | }; | |
109 | ||
110 | const char * dyn_section_names[DYN_SECTION_TYPES_END] = | |
111 | { | |
112 | ".got", | |
113 | ".rela.got", | |
114 | ".got.plt", | |
115 | ".dynamic", | |
116 | ".plt", | |
117 | ".rela.plt" | |
118 | }; | |
119 | ||
34e967a5 MC |
120 | enum tls_type_e |
121 | { | |
122 | GOT_UNKNOWN = 0, | |
123 | GOT_NORMAL, | |
124 | GOT_TLS_GD, | |
125 | GOT_TLS_IE, | |
126 | GOT_TLS_LE | |
127 | }; | |
128 | ||
129 | enum tls_got_entries | |
130 | { | |
33cbe6c0 AB |
131 | TLS_GOT_NONE = 0, |
132 | TLS_GOT_MOD, | |
133 | TLS_GOT_OFF, | |
134 | TLS_GOT_MOD_AND_OFF | |
34e967a5 MC |
135 | }; |
136 | ||
137 | struct got_entry | |
138 | { | |
139 | struct got_entry *next; | |
140 | enum tls_type_e type; | |
141 | bfd_vma offset; | |
142 | bfd_boolean processed; | |
143 | bfd_boolean created_dyn_relocation; | |
144 | enum tls_got_entries existing_entries; | |
145 | }; | |
146 | ||
147 | static void | |
148 | new_got_entry_to_list (struct got_entry **list, | |
149 | enum tls_type_e type, | |
150 | bfd_vma offset, | |
151 | enum tls_got_entries existing_entries) | |
152 | { | |
153 | /* Find list end. Avoid having multiple entries of the same | |
154 | type. */ | |
155 | struct got_entry **p = list; | |
156 | while (*p != NULL) | |
157 | { | |
158 | if ((*p)->type == type) | |
159 | return; | |
160 | p = &((*p)->next); | |
161 | } | |
162 | ||
163 | struct got_entry *entry = | |
164 | (struct got_entry *) malloc (sizeof(struct got_entry)); | |
165 | ||
166 | entry->type = type; | |
167 | entry->offset = offset; | |
168 | entry->next = NULL; | |
169 | entry->processed = FALSE; | |
170 | entry->created_dyn_relocation = FALSE; | |
171 | entry->existing_entries = existing_entries; | |
172 | ||
173 | /* Add the entry to the end of the list. */ | |
174 | *p = entry; | |
175 | } | |
176 | ||
177 | static bfd_boolean | |
178 | symbol_has_entry_of_type (struct got_entry *list, enum tls_type_e type) | |
179 | { | |
180 | while (list != NULL) | |
181 | { | |
182 | if (list->type == type) | |
183 | return TRUE; | |
184 | list = list->next; | |
185 | } | |
186 | ||
187 | return FALSE; | |
188 | } | |
189 | ||
886a2506 NC |
190 | /* The default symbols representing the init and fini dyn values. |
191 | TODO: Check what is the relation of those strings with arclinux.em | |
192 | and DT_INIT. */ | |
193 | #define INIT_SYM_STRING "_init" | |
194 | #define FINI_SYM_STRING "_fini" | |
195 | ||
196 | char * init_str = INIT_SYM_STRING; | |
197 | char * fini_str = FINI_SYM_STRING; | |
198 | ||
886a2506 NC |
199 | #define ARC_RELOC_HOWTO(TYPE, VALUE, SIZE, BITSIZE, RELOC_FUNCTION, OVERFLOW, FORMULA) \ |
200 | case VALUE: \ | |
b05a65d0 | 201 | return "R_" #TYPE; \ |
886a2506 NC |
202 | break; |
203 | ||
204 | static ATTRIBUTE_UNUSED const char * | |
205 | reloc_type_to_name (unsigned int type) | |
206 | { | |
207 | switch (type) | |
208 | { | |
209 | #include "elf/arc-reloc.def" | |
210 | ||
211 | default: | |
212 | return "UNKNOWN"; | |
213 | break; | |
214 | } | |
215 | } | |
216 | #undef ARC_RELOC_HOWTO | |
252b5132 | 217 | |
252b5132 RH |
218 | /* Try to minimize the amount of space occupied by relocation tables |
219 | on the ROM (not that the ROM won't be swamped by other ELF overhead). */ | |
0d2bcfaf | 220 | |
886a2506 NC |
221 | #define USE_REL 1 |
222 | ||
223 | static ATTRIBUTE_UNUSED bfd_boolean | |
224 | is_reloc_PC_relative (reloc_howto_type *howto) | |
225 | { | |
226 | return (strstr (howto->name, "PC") != NULL) ? TRUE : FALSE; | |
227 | } | |
228 | ||
229 | static bfd_boolean | |
230 | is_reloc_SDA_relative (reloc_howto_type *howto) | |
231 | { | |
232 | return (strstr (howto->name, "SDA") != NULL) ? TRUE : FALSE; | |
233 | } | |
234 | ||
235 | static bfd_boolean | |
236 | is_reloc_for_GOT (reloc_howto_type * howto) | |
237 | { | |
34e967a5 MC |
238 | if (strstr (howto->name, "TLS") != NULL) |
239 | return FALSE; | |
886a2506 NC |
240 | return (strstr (howto->name, "GOT") != NULL) ? TRUE : FALSE; |
241 | } | |
242 | ||
243 | static bfd_boolean | |
244 | is_reloc_for_PLT (reloc_howto_type * howto) | |
245 | { | |
246 | return (strstr (howto->name, "PLT") != NULL) ? TRUE : FALSE; | |
247 | } | |
248 | ||
34e967a5 MC |
249 | static bfd_boolean |
250 | is_reloc_for_TLS (reloc_howto_type *howto) | |
251 | { | |
252 | return (strstr (howto->name, "TLS") != NULL) ? TRUE : FALSE; | |
253 | } | |
254 | ||
886a2506 NC |
255 | #define arc_bfd_get_8(A,B,C) bfd_get_8(A,B) |
256 | #define arc_bfd_get_16(A,B,C) bfd_get_16(A,B) | |
72f3b6aa | 257 | #define arc_bfd_get_32(A,B,C) bfd_get_32(A,B) |
886a2506 NC |
258 | #define arc_bfd_put_8(A,B,C,D) bfd_put_8(A,B,C) |
259 | #define arc_bfd_put_16(A,B,C,D) bfd_put_16(A,B,C) | |
72f3b6aa | 260 | #define arc_bfd_put_32(A,B,C,D) bfd_put_32(A,B,C) |
886a2506 | 261 | |
252b5132 | 262 | |
47b0e7ad | 263 | static bfd_reloc_status_type |
886a2506 NC |
264 | arc_elf_reloc (bfd *abfd ATTRIBUTE_UNUSED, |
265 | arelent *reloc_entry, | |
266 | asymbol *symbol_in, | |
267 | void *data ATTRIBUTE_UNUSED, | |
268 | asection *input_section, | |
269 | bfd *output_bfd, | |
270 | char ** error_message ATTRIBUTE_UNUSED) | |
271 | { | |
272 | if (output_bfd != NULL) | |
273 | { | |
274 | reloc_entry->address += input_section->output_offset; | |
275 | ||
276 | /* In case of relocateable link and if the reloc is against a | |
277 | section symbol, the addend needs to be adjusted according to | |
278 | where the section symbol winds up in the output section. */ | |
279 | if ((symbol_in->flags & BSF_SECTION_SYM) && symbol_in->section) | |
280 | reloc_entry->addend += symbol_in->section->output_offset; | |
281 | ||
282 | return bfd_reloc_ok; | |
283 | } | |
284 | ||
285 | return bfd_reloc_continue; | |
286 | } | |
287 | ||
288 | ||
289 | #define ARC_RELOC_HOWTO(TYPE, VALUE, SIZE, BITSIZE, RELOC_FUNCTION, OVERFLOW, FORMULA) \ | |
290 | TYPE = VALUE, | |
291 | enum howto_list | |
292 | { | |
293 | #include "elf/arc-reloc.def" | |
294 | HOWTO_LIST_LAST | |
295 | }; | |
296 | #undef ARC_RELOC_HOWTO | |
297 | ||
298 | #define ARC_RELOC_HOWTO(TYPE, VALUE, RSIZE, BITSIZE, RELOC_FUNCTION, OVERFLOW, FORMULA) \ | |
b05a65d0 | 299 | [TYPE] = HOWTO (R_##TYPE, 0, RSIZE, BITSIZE, FALSE, 0, complain_overflow_##OVERFLOW, arc_elf_reloc, "R_" #TYPE, FALSE, 0, 0, FALSE), |
886a2506 NC |
300 | |
301 | static struct reloc_howto_struct elf_arc_howto_table[] = | |
302 | { | |
303 | #include "elf/arc-reloc.def" | |
34e967a5 MC |
304 | /* Example of what is generated by the preprocessor. Currently kept as an |
305 | example. | |
886a2506 NC |
306 | HOWTO (R_ARC_NONE, // Type. |
307 | 0, // Rightshift. | |
308 | 2, // Size (0 = byte, 1 = short, 2 = long). | |
309 | 32, // Bitsize. | |
310 | FALSE, // PC_relative. | |
311 | 0, // Bitpos. | |
312 | complain_overflow_bitfield, // Complain_on_overflow. | |
313 | bfd_elf_generic_reloc, // Special_function. | |
314 | "R_ARC_NONE", // Name. | |
315 | TRUE, // Partial_inplace. | |
316 | 0, // Src_mask. | |
317 | 0, // Dst_mask. | |
318 | FALSE), // PCrel_offset. | |
319 | */ | |
320 | }; | |
321 | #undef ARC_RELOC_HOWTO | |
322 | ||
323 | static void arc_elf_howto_init (void) | |
324 | { | |
325 | #define ARC_RELOC_HOWTO(TYPE, VALUE, SIZE, BITSIZE, RELOC_FUNCTION, OVERFLOW, FORMULA) \ | |
6f4b1afc | 326 | elf_arc_howto_table[TYPE].pc_relative = \ |
0a5ff21b | 327 | (strstr (#FORMULA, " P ") != NULL || strstr (#FORMULA, " PDATA ") != NULL); \ |
72f3b6aa CZ |
328 | elf_arc_howto_table[TYPE].dst_mask = RELOC_FUNCTION(0, ~0); \ |
329 | /* Only 32 bit data relocations should be marked as ME. */ \ | |
330 | if (strstr (#FORMULA, " ME ") != NULL) \ | |
331 | { \ | |
332 | BFD_ASSERT (SIZE == 2); \ | |
333 | } | |
886a2506 | 334 | |
34e967a5 | 335 | #include "elf/arc-reloc.def" |
72f3b6aa | 336 | |
47b0e7ad | 337 | } |
886a2506 | 338 | #undef ARC_RELOC_HOWTO |
47b0e7ad | 339 | |
886a2506 NC |
340 | |
341 | #define ARC_RELOC_HOWTO(TYPE, VALUE, SIZE, BITSIZE, RELOC_FUNCTION, OVERFLOW, FORMULA) \ | |
342 | [TYPE] = VALUE, | |
343 | const int howto_table_lookup[] = | |
344 | { | |
34e967a5 | 345 | #include "elf/arc-reloc.def" |
252b5132 | 346 | }; |
886a2506 NC |
347 | #undef ARC_RELOC_HOWTO |
348 | ||
f26dd308 AM |
349 | static reloc_howto_type * |
350 | arc_elf_howto (unsigned int r_type) | |
351 | { | |
352 | if (elf_arc_howto_table[R_ARC_32].dst_mask == 0) | |
353 | arc_elf_howto_init (); | |
354 | return &elf_arc_howto_table[r_type]; | |
355 | } | |
252b5132 RH |
356 | |
357 | /* Map BFD reloc types to ARC ELF reloc types. */ | |
358 | ||
359 | struct arc_reloc_map | |
360 | { | |
34e967a5 MC |
361 | bfd_reloc_code_real_type bfd_reloc_val; |
362 | unsigned char elf_reloc_val; | |
252b5132 RH |
363 | }; |
364 | ||
886a2506 NC |
365 | #define ARC_RELOC_HOWTO(TYPE, VALUE, SIZE, BITSIZE, RELOC_FUNCTION, OVERFLOW, FORMULA) \ |
366 | { BFD_RELOC_##TYPE, R_##TYPE }, | |
252b5132 RH |
367 | static const struct arc_reloc_map arc_reloc_map[] = |
368 | { | |
34e967a5 MC |
369 | #include "elf/arc-reloc.def" |
370 | ||
886a2506 NC |
371 | {BFD_RELOC_NONE, R_ARC_NONE}, |
372 | {BFD_RELOC_8, R_ARC_8}, | |
373 | {BFD_RELOC_16, R_ARC_16}, | |
374 | {BFD_RELOC_24, R_ARC_24}, | |
375 | {BFD_RELOC_32, R_ARC_32}, | |
252b5132 | 376 | }; |
886a2506 | 377 | #undef ARC_RELOC_HOWTO |
252b5132 | 378 | |
094fb063 CZ |
379 | typedef ATTRIBUTE_UNUSED bfd_vma (*replace_func) (unsigned, int ATTRIBUTE_UNUSED); |
380 | ||
381 | #define ARC_RELOC_HOWTO(TYPE, VALUE, SIZE, BITSIZE, RELOC_FUNCTION, OVERFLOW, FORMULA) \ | |
382 | case TYPE: \ | |
383 | func = (void *) RELOC_FUNCTION; \ | |
384 | break; | |
385 | static replace_func | |
386 | get_replace_function (bfd *abfd, unsigned int r_type) | |
387 | { | |
388 | void *func = NULL; | |
389 | ||
390 | switch (r_type) | |
391 | { | |
392 | #include "elf/arc-reloc.def" | |
393 | } | |
394 | ||
395 | if (func == replace_bits24 && bfd_big_endian (abfd)) | |
396 | return (replace_func) replace_bits24_be; | |
397 | ||
398 | return (replace_func) func; | |
399 | } | |
400 | #undef ARC_RELOC_HOWTO | |
401 | ||
252b5132 | 402 | static reloc_howto_type * |
34e967a5 | 403 | arc_elf32_bfd_reloc_type_lookup (bfd * abfd ATTRIBUTE_UNUSED, |
47b0e7ad | 404 | bfd_reloc_code_real_type code) |
252b5132 RH |
405 | { |
406 | unsigned int i; | |
407 | ||
ea04a8f6 | 408 | for (i = ARRAY_SIZE (arc_reloc_map); i--;) |
886a2506 NC |
409 | { |
410 | if (arc_reloc_map[i].bfd_reloc_val == code) | |
f26dd308 | 411 | return arc_elf_howto (arc_reloc_map[i].elf_reloc_val); |
886a2506 | 412 | } |
ea04a8f6 | 413 | |
252b5132 RH |
414 | return NULL; |
415 | } | |
416 | ||
34e967a5 MC |
417 | /* Function to set the ELF flag bits. */ |
418 | static bfd_boolean | |
419 | arc_elf_set_private_flags (bfd *abfd, flagword flags) | |
420 | { | |
421 | elf_elfheader (abfd)->e_flags = flags; | |
422 | elf_flags_init (abfd) = TRUE; | |
423 | return TRUE; | |
424 | } | |
425 | ||
426 | /* Print private flags. */ | |
427 | static bfd_boolean | |
428 | arc_elf_print_private_bfd_data (bfd *abfd, void * ptr) | |
429 | { | |
430 | FILE *file = (FILE *) ptr; | |
431 | flagword flags; | |
432 | ||
433 | BFD_ASSERT (abfd != NULL && ptr != NULL); | |
434 | ||
435 | /* Print normal ELF private data. */ | |
436 | _bfd_elf_print_private_bfd_data (abfd, ptr); | |
437 | ||
438 | flags = elf_elfheader (abfd)->e_flags; | |
439 | fprintf (file, _("private flags = 0x%lx:"), (unsigned long) flags); | |
440 | ||
441 | switch (flags & EF_ARC_MACH_MSK) | |
442 | { | |
34e967a5 MC |
443 | case EF_ARC_CPU_ARCV2HS : fprintf (file, " -mcpu=ARCv2HS"); break; |
444 | case EF_ARC_CPU_ARCV2EM : fprintf (file, " -mcpu=ARCv2EM"); break; | |
445 | case E_ARC_MACH_ARC600 : fprintf (file, " -mcpu=ARC600"); break; | |
446 | case E_ARC_MACH_ARC601 : fprintf (file, " -mcpu=ARC601"); break; | |
447 | case E_ARC_MACH_ARC700 : fprintf (file, " -mcpu=ARC700"); break; | |
448 | default: | |
449 | fprintf (file, "-mcpu=unknown"); | |
450 | break; | |
451 | } | |
452 | ||
453 | switch (flags & EF_ARC_OSABI_MSK) | |
454 | { | |
455 | case E_ARC_OSABI_ORIG : fprintf (file, " (ABI:legacy)"); break; | |
456 | case E_ARC_OSABI_V2 : fprintf (file, " (ABI:v2)"); break; | |
457 | case E_ARC_OSABI_V3 : fprintf (file, " (ABI:v3)"); break; | |
458 | default: | |
459 | fprintf (file, "(ABI:unknown)"); | |
460 | break; | |
461 | } | |
462 | ||
463 | fputc ('\n', file); | |
464 | return TRUE; | |
465 | } | |
466 | ||
467 | /* Copy backend specific data from one object module to another. */ | |
468 | ||
469 | static bfd_boolean | |
470 | arc_elf_copy_private_bfd_data (bfd *ibfd, bfd *obfd) | |
471 | { | |
472 | if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour | |
473 | || bfd_get_flavour (obfd) != bfd_target_elf_flavour) | |
474 | return TRUE; | |
475 | ||
476 | BFD_ASSERT (!elf_flags_init (obfd) | |
477 | || elf_elfheader (obfd)->e_flags == elf_elfheader (ibfd)->e_flags); | |
478 | ||
479 | elf_elfheader (obfd)->e_flags = elf_elfheader (ibfd)->e_flags; | |
480 | elf_flags_init (obfd) = TRUE; | |
481 | ||
482 | /* Copy object attributes. */ | |
483 | _bfd_elf_copy_obj_attributes (ibfd, obfd); | |
484 | ||
485 | return _bfd_elf_copy_private_bfd_data (ibfd, obfd); | |
486 | } | |
487 | ||
157090f7 | 488 | static reloc_howto_type * |
34e967a5 MC |
489 | bfd_elf32_bfd_reloc_name_lookup (bfd * abfd ATTRIBUTE_UNUSED, |
490 | const char *r_name) | |
157090f7 AM |
491 | { |
492 | unsigned int i; | |
493 | ||
886a2506 | 494 | for (i = 0; i < ARRAY_SIZE (elf_arc_howto_table); i++) |
157090f7 AM |
495 | if (elf_arc_howto_table[i].name != NULL |
496 | && strcasecmp (elf_arc_howto_table[i].name, r_name) == 0) | |
f26dd308 | 497 | return arc_elf_howto (i); |
157090f7 AM |
498 | |
499 | return NULL; | |
500 | } | |
501 | ||
886a2506 | 502 | /* Set the howto pointer for an ARC ELF reloc. */ |
34e967a5 | 503 | |
252b5132 | 504 | static void |
886a2506 NC |
505 | arc_info_to_howto_rel (bfd * abfd ATTRIBUTE_UNUSED, |
506 | arelent * cache_ptr, | |
507 | Elf_Internal_Rela * dst) | |
252b5132 RH |
508 | { |
509 | unsigned int r_type; | |
510 | ||
511 | r_type = ELF32_R_TYPE (dst->r_info); | |
886a2506 | 512 | BFD_ASSERT (r_type < (unsigned int) R_ARC_max); |
f26dd308 | 513 | cache_ptr->howto = arc_elf_howto (r_type); |
252b5132 RH |
514 | } |
515 | ||
34e967a5 MC |
516 | /* Merge backend specific data from an object file to the output |
517 | object file when linking. */ | |
518 | ||
519 | static bfd_boolean | |
520 | arc_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd) | |
521 | { | |
522 | unsigned short mach_ibfd; | |
523 | static unsigned short mach_obfd = EM_NONE; | |
524 | flagword out_flags; | |
525 | flagword in_flags; | |
526 | asection *sec; | |
527 | ||
528 | /* Check if we have the same endianess. */ | |
529 | if (! _bfd_generic_verify_endian_match (ibfd, obfd)) | |
530 | { | |
531 | _bfd_error_handler (_("ERROR: Endian Match failed. Attempting to link " | |
532 | "%B with binary %s of opposite endian-ness"), | |
533 | ibfd, bfd_get_filename (obfd)); | |
534 | return FALSE; | |
535 | } | |
536 | ||
537 | /* Collect ELF flags. */ | |
538 | in_flags = elf_elfheader (ibfd)->e_flags & EF_ARC_MACH_MSK; | |
539 | out_flags = elf_elfheader (obfd)->e_flags & EF_ARC_MACH_MSK; | |
540 | ||
541 | if (!elf_flags_init (obfd)) /* First call, no flags set. */ | |
542 | { | |
543 | elf_flags_init (obfd) = TRUE; | |
544 | out_flags = in_flags; | |
545 | } | |
546 | ||
547 | if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour | |
548 | || bfd_get_flavour (obfd) != bfd_target_elf_flavour) | |
549 | return TRUE; | |
550 | ||
551 | /* Check to see if the input BFD actually contains any sections. Do | |
552 | not short-circuit dynamic objects; their section list may be | |
553 | emptied by elf_link_add_object_symbols. */ | |
554 | if (!(ibfd->flags & DYNAMIC)) | |
555 | { | |
556 | bfd_boolean null_input_bfd = TRUE; | |
557 | bfd_boolean only_data_sections = TRUE; | |
558 | ||
559 | for (sec = ibfd->sections; sec != NULL; sec = sec->next) | |
560 | { | |
561 | if ((bfd_get_section_flags (ibfd, sec) | |
562 | & (SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS)) | |
563 | == (SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS)) | |
564 | only_data_sections = FALSE; | |
565 | ||
566 | null_input_bfd = FALSE; | |
567 | } | |
568 | ||
569 | if (null_input_bfd || only_data_sections) | |
570 | return TRUE; | |
571 | } | |
572 | ||
573 | /* Complain about various flag/architecture mismatches. */ | |
574 | mach_ibfd = elf_elfheader (ibfd)->e_machine; | |
575 | if (mach_obfd == EM_NONE) | |
576 | { | |
577 | mach_obfd = mach_ibfd; | |
578 | } | |
579 | else | |
580 | { | |
581 | if (mach_ibfd != mach_obfd) | |
582 | { | |
583 | _bfd_error_handler (_("ERROR: Attempting to link %B " | |
584 | "with a binary %s of different architecture"), | |
585 | ibfd, bfd_get_filename (obfd)); | |
586 | return FALSE; | |
587 | } | |
588 | else if (in_flags != out_flags) | |
589 | { | |
590 | /* Warn if different flags. */ | |
591 | (*_bfd_error_handler) | |
592 | (_("%s: uses different e_flags (0x%lx) fields than " | |
593 | "previous modules (0x%lx)"), | |
594 | bfd_get_filename (ibfd), (long)in_flags, (long)out_flags); | |
595 | if (in_flags && out_flags) | |
596 | return FALSE; | |
597 | /* MWDT doesnt set the eflags hence make sure we choose the | |
598 | eflags set by gcc. */ | |
599 | in_flags = in_flags > out_flags ? in_flags : out_flags; | |
600 | } | |
601 | } | |
602 | ||
603 | /* Update the flags. */ | |
604 | elf_elfheader (obfd)->e_flags = in_flags; | |
605 | ||
606 | if (bfd_get_mach (obfd) < bfd_get_mach (ibfd)) | |
607 | { | |
608 | return bfd_set_arch_mach (obfd, bfd_arch_arc, bfd_get_mach (ibfd)); | |
609 | } | |
610 | ||
611 | return TRUE; | |
612 | } | |
613 | ||
252b5132 | 614 | /* Set the right machine number for an ARC ELF file. */ |
b34976b6 | 615 | static bfd_boolean |
886a2506 | 616 | arc_elf_object_p (bfd * abfd) |
252b5132 | 617 | { |
886a2506 NC |
618 | /* Make sure this is initialised, or you'll have the potential of passing |
619 | garbage---or misleading values---into the call to | |
620 | bfd_default_set_arch_mach (). */ | |
621 | int mach = bfd_mach_arc_arc700; | |
622 | unsigned long arch = elf_elfheader (abfd)->e_flags & EF_ARC_MACH_MSK; | |
623 | unsigned e_machine = elf_elfheader (abfd)->e_machine; | |
252b5132 | 624 | |
886a2506 | 625 | if (e_machine == EM_ARC_COMPACT || e_machine == EM_ARC_COMPACT2) |
252b5132 | 626 | { |
0d2bcfaf NC |
627 | switch (arch) |
628 | { | |
886a2506 NC |
629 | case E_ARC_MACH_ARC600: |
630 | mach = bfd_mach_arc_arc600; | |
631 | break; | |
632 | case E_ARC_MACH_ARC601: | |
633 | mach = bfd_mach_arc_arc601; | |
634 | break; | |
635 | case E_ARC_MACH_ARC700: | |
636 | mach = bfd_mach_arc_arc700; | |
637 | break; | |
8699fc3e AB |
638 | case E_ARC_MACH_NPS400: |
639 | mach = bfd_mach_arc_nps400; | |
640 | break; | |
886a2506 NC |
641 | case EF_ARC_CPU_ARCV2HS: |
642 | case EF_ARC_CPU_ARCV2EM: | |
643 | mach = bfd_mach_arc_arcv2; | |
644 | break; | |
645 | default: | |
646 | mach = (e_machine == EM_ARC_COMPACT) ? | |
647 | bfd_mach_arc_arc700 : bfd_mach_arc_arcv2; | |
648 | break; | |
649 | } | |
650 | } | |
651 | else | |
652 | { | |
653 | if (e_machine == EM_ARC) | |
654 | { | |
655 | (*_bfd_error_handler) | |
656 | (_("Error: The ARC4 architecture is no longer supported.\n")); | |
657 | return FALSE; | |
658 | } | |
659 | else | |
660 | { | |
661 | (*_bfd_error_handler) | |
662 | (_("Warning: unset or old architecture flags. \n" | |
663 | " Use default machine.\n")); | |
0d2bcfaf | 664 | } |
252b5132 | 665 | } |
886a2506 | 666 | |
0d2bcfaf | 667 | return bfd_default_set_arch_mach (abfd, bfd_arch_arc, mach); |
252b5132 RH |
668 | } |
669 | ||
670 | /* The final processing done just before writing out an ARC ELF object file. | |
671 | This gets the ARC architecture right based on the machine number. */ | |
672 | ||
673 | static void | |
34e967a5 MC |
674 | arc_elf_final_write_processing (bfd * abfd, |
675 | bfd_boolean linker ATTRIBUTE_UNUSED) | |
252b5132 | 676 | { |
886a2506 | 677 | unsigned long emf; |
252b5132 | 678 | |
0d2bcfaf | 679 | switch (bfd_get_mach (abfd)) |
252b5132 | 680 | { |
886a2506 | 681 | case bfd_mach_arc_arc600: |
886a2506 | 682 | emf = EM_ARC_COMPACT; |
0d2bcfaf | 683 | break; |
886a2506 | 684 | case bfd_mach_arc_arc601: |
886a2506 | 685 | emf = EM_ARC_COMPACT; |
0d2bcfaf | 686 | break; |
886a2506 | 687 | case bfd_mach_arc_arc700: |
886a2506 | 688 | emf = EM_ARC_COMPACT; |
0d2bcfaf | 689 | break; |
8699fc3e AB |
690 | case bfd_mach_arc_nps400: |
691 | emf = EM_ARC_COMPACT; | |
692 | break; | |
886a2506 | 693 | case bfd_mach_arc_arcv2: |
886a2506 | 694 | emf = EM_ARC_COMPACT2; |
0d2bcfaf | 695 | break; |
886a2506 | 696 | default: |
3c8adaca | 697 | goto DO_NOTHING; |
252b5132 | 698 | } |
34e967a5 | 699 | |
886a2506 | 700 | elf_elfheader (abfd)->e_machine = emf; |
7e458899 | 701 | |
886a2506 NC |
702 | /* Record whatever is the current syscall ABI version. */ |
703 | elf_elfheader (abfd)->e_flags |= E_ARC_OSABI_CURRENT; | |
3c8adaca CZ |
704 | |
705 | DO_NOTHING: | |
706 | return; | |
252b5132 RH |
707 | } |
708 | ||
886a2506 NC |
709 | #define BFD_DEBUG_PIC(...) |
710 | ||
711 | struct arc_relocation_data | |
712 | { | |
094fb063 CZ |
713 | bfd_signed_vma reloc_offset; |
714 | bfd_signed_vma reloc_addend; | |
715 | bfd_signed_vma got_offset_value; | |
886a2506 | 716 | |
094fb063 | 717 | bfd_signed_vma sym_value; |
886a2506 NC |
718 | asection * sym_section; |
719 | ||
720 | reloc_howto_type *howto; | |
721 | ||
722 | asection * input_section; | |
723 | ||
094fb063 | 724 | bfd_signed_vma sdata_begin_symbol_vma; |
886a2506 | 725 | bfd_boolean sdata_begin_symbol_vma_set; |
094fb063 | 726 | bfd_signed_vma got_symbol_vma; |
886a2506 NC |
727 | |
728 | bfd_boolean should_relocate; | |
4b0c052e AB |
729 | |
730 | const char * symbol_name; | |
886a2506 NC |
731 | }; |
732 | ||
733 | static void | |
734 | debug_arc_reloc (struct arc_relocation_data reloc_data) | |
735 | { | |
34e967a5 | 736 | PR_DEBUG ("Reloc type=%s, should_relocate = %s\n", |
886a2506 NC |
737 | reloc_data.howto->name, |
738 | reloc_data.should_relocate ? "true" : "false"); | |
34e967a5 | 739 | PR_DEBUG (" offset = 0x%x, addend = 0x%x\n", |
886a2506 NC |
740 | (unsigned int) reloc_data.reloc_offset, |
741 | (unsigned int) reloc_data.reloc_addend); | |
34e967a5 MC |
742 | PR_DEBUG (" Symbol:\n"); |
743 | PR_DEBUG (" value = 0x%08x\n", | |
886a2506 NC |
744 | (unsigned int) reloc_data.sym_value); |
745 | if (reloc_data.sym_section != NULL) | |
746 | { | |
3c8adaca | 747 | PR_DEBUG (" Symbol Section:\n"); |
34e967a5 MC |
748 | PR_DEBUG ( |
749 | " section name = %s, output_offset 0x%08x", | |
886a2506 | 750 | reloc_data.sym_section->name, |
34e967a5 MC |
751 | (unsigned int) reloc_data.sym_section->output_offset); |
752 | if (reloc_data.sym_section->output_section != NULL) | |
753 | { | |
754 | PR_DEBUG ( | |
755 | ", output_section->vma = 0x%08x", | |
756 | ((unsigned int) reloc_data.sym_section->output_section->vma)); | |
757 | } | |
34e967a5 | 758 | PR_DEBUG ( "\n"); |
3c8adaca | 759 | PR_DEBUG (" file: %s\n", reloc_data.sym_section->owner->filename); |
886a2506 NC |
760 | } |
761 | else | |
34e967a5 MC |
762 | { |
763 | PR_DEBUG ( " symbol section is NULL\n"); | |
764 | } | |
886a2506 | 765 | |
34e967a5 | 766 | PR_DEBUG ( " Input_section:\n"); |
886a2506 NC |
767 | if (reloc_data.input_section != NULL) |
768 | { | |
34e967a5 | 769 | PR_DEBUG ( |
886a2506 NC |
770 | " section name = %s, output_offset 0x%08x, output_section->vma = 0x%08x\n", |
771 | reloc_data.input_section->name, | |
772 | (unsigned int) reloc_data.input_section->output_offset, | |
773 | (unsigned int) reloc_data.input_section->output_section->vma); | |
34e967a5 | 774 | PR_DEBUG ( " changed_address = 0x%08x\n", |
886a2506 NC |
775 | (unsigned int) (reloc_data.input_section->output_section->vma + |
776 | reloc_data.input_section->output_offset + | |
777 | reloc_data.reloc_offset)); | |
3c8adaca | 778 | PR_DEBUG (" file: %s\n", reloc_data.input_section->owner->filename); |
886a2506 NC |
779 | } |
780 | else | |
34e967a5 MC |
781 | { |
782 | PR_DEBUG ( " input section is NULL\n"); | |
783 | } | |
886a2506 NC |
784 | } |
785 | ||
72f3b6aa CZ |
786 | static bfd_vma |
787 | middle_endian_convert (bfd_vma insn, bfd_boolean do_it) | |
6f4b1afc | 788 | { |
72f3b6aa CZ |
789 | if (do_it) |
790 | { | |
791 | insn = | |
792 | ((insn & 0xffff0000) >> 16) | | |
793 | ((insn & 0xffff) << 16); | |
794 | } | |
795 | return insn; | |
6f4b1afc CM |
796 | } |
797 | ||
4b0c052e AB |
798 | /* This function is called for relocations that are otherwise marked as NOT |
799 | requiring overflow checks. In here we perform non-standard checks of | |
800 | the relocation value. */ | |
801 | ||
802 | static inline bfd_reloc_status_type | |
803 | arc_special_overflow_checks (const struct arc_relocation_data reloc_data, | |
804 | bfd_signed_vma relocation, | |
805 | struct bfd_link_info *info ATTRIBUTE_UNUSED) | |
806 | { | |
807 | switch (reloc_data.howto->type) | |
808 | { | |
809 | case R_ARC_NPS_CMEM16: | |
810 | if (((relocation >> 16) & 0xffff) != NPS_CMEM_HIGH_VALUE) | |
811 | { | |
812 | if (reloc_data.reloc_addend == 0) | |
813 | (*_bfd_error_handler) | |
814 | (_("%B(%A+0x%lx): CMEM relocation to `%s' is invalid, " | |
815 | "16 MSB should be 0x%04x (value is 0x%lx)"), | |
816 | reloc_data.input_section->owner, | |
817 | reloc_data.input_section, | |
818 | reloc_data.reloc_offset, | |
819 | reloc_data.symbol_name, | |
820 | NPS_CMEM_HIGH_VALUE, | |
821 | (relocation)); | |
822 | else | |
823 | (*_bfd_error_handler) | |
824 | (_("%B(%A+0x%lx): CMEM relocation to `%s+0x%lx' is invalid, " | |
825 | "16 MSB should be 0x%04x (value is 0x%lx)"), | |
826 | reloc_data.input_section->owner, | |
827 | reloc_data.input_section, | |
828 | reloc_data.reloc_offset, | |
829 | reloc_data.symbol_name, | |
830 | reloc_data.reloc_addend, | |
831 | NPS_CMEM_HIGH_VALUE, | |
832 | (relocation)); | |
833 | return bfd_reloc_overflow; | |
834 | } | |
835 | break; | |
836 | ||
837 | default: | |
838 | break; | |
839 | } | |
840 | ||
841 | return bfd_reloc_ok; | |
842 | } | |
843 | ||
72f3b6aa CZ |
844 | #define ME(reloc) (reloc) |
845 | ||
846 | #define IS_ME(FORMULA,BFD) ((strstr (FORMULA, "ME") != NULL) \ | |
847 | && (!bfd_big_endian (BFD))) | |
848 | ||
094fb063 | 849 | #define S ((bfd_signed_vma) (reloc_data.sym_value \ |
34e967a5 MC |
850 | + (reloc_data.sym_section->output_section != NULL ? \ |
851 | (reloc_data.sym_section->output_offset \ | |
094fb063 CZ |
852 | + reloc_data.sym_section->output_section->vma) : 0))) |
853 | #define L ((bfd_signed_vma) (reloc_data.sym_value \ | |
34e967a5 MC |
854 | + (reloc_data.sym_section->output_section != NULL ? \ |
855 | (reloc_data.sym_section->output_offset \ | |
094fb063 | 856 | + reloc_data.sym_section->output_section->vma) : 0))) |
886a2506 NC |
857 | #define A (reloc_data.reloc_addend) |
858 | #define B (0) | |
859 | #define G (reloc_data.got_offset_value) | |
34e967a5 MC |
860 | #define GOT (reloc_data.got_symbol_vma) |
861 | #define GOT_BEGIN (htab->sgot->output_section->vma) | |
862 | ||
886a2506 | 863 | #define MES (0) |
34e967a5 MC |
864 | /* P: relative offset to PCL The offset should be to the |
865 | current location aligned to 32 bits. */ | |
094fb063 | 866 | #define P ((bfd_signed_vma) ( \ |
34e967a5 MC |
867 | ( \ |
868 | (reloc_data.input_section->output_section != NULL ? \ | |
869 | reloc_data.input_section->output_section->vma : 0) \ | |
870 | + reloc_data.input_section->output_offset \ | |
094fb063 CZ |
871 | + (reloc_data.reloc_offset - (bitsize >= 32 ? 4 : 0))) \ |
872 | & ~0x3)) | |
873 | #define PDATA ((bfd_signed_vma) ( \ | |
6f4b1afc CM |
874 | (reloc_data.input_section->output_section->vma \ |
875 | + reloc_data.input_section->output_offset \ | |
094fb063 CZ |
876 | + (reloc_data.reloc_offset)))) |
877 | #define SECTSTART (bfd_signed_vma) (reloc_data.input_section->output_offset) | |
878 | #define _SDA_BASE_ (bfd_signed_vma) (reloc_data.sdata_begin_symbol_vma) | |
879 | #define TLS_REL (bfd_signed_vma) \ | |
880 | ((elf_hash_table (info))->tls_sec->output_section->vma) | |
34e967a5 MC |
881 | #define TLS_TBSS (8) |
882 | #define TCB_SIZE (8) | |
883 | ||
886a2506 NC |
884 | #define none (0) |
885 | ||
094fb063 | 886 | #define PRINT_DEBUG_RELOC_INFO_BEFORE(FORMULA, TYPE) \ |
34e967a5 MC |
887 | {\ |
888 | asection *sym_section = reloc_data.sym_section; \ | |
889 | asection *input_section = reloc_data.input_section; \ | |
094fb063 CZ |
890 | ARC_DEBUG ("RELOC_TYPE = " TYPE "\n"); \ |
891 | ARC_DEBUG ("FORMULA = " FORMULA "\n"); \ | |
34e967a5 MC |
892 | ARC_DEBUG ("S = 0x%x\n", S); \ |
893 | ARC_DEBUG ("A = 0x%x\n", A); \ | |
894 | ARC_DEBUG ("L = 0x%x\n", L); \ | |
895 | if (sym_section->output_section != NULL) \ | |
896 | { \ | |
897 | ARC_DEBUG ("symbol_section->vma = 0x%x\n", \ | |
898 | sym_section->output_section->vma + sym_section->output_offset); \ | |
899 | } \ | |
900 | else \ | |
901 | { \ | |
902 | ARC_DEBUG ("symbol_section->vma = NULL\n"); \ | |
903 | } \ | |
904 | if (input_section->output_section != NULL) \ | |
905 | { \ | |
906 | ARC_DEBUG ("symbol_section->vma = 0x%x\n", \ | |
907 | input_section->output_section->vma + input_section->output_offset); \ | |
908 | } \ | |
909 | else \ | |
910 | { \ | |
911 | ARC_DEBUG ("symbol_section->vma = NULL\n"); \ | |
912 | } \ | |
913 | ARC_DEBUG ("PCL = 0x%x\n", P); \ | |
914 | ARC_DEBUG ("P = 0x%x\n", P); \ | |
915 | ARC_DEBUG ("G = 0x%x\n", G); \ | |
916 | ARC_DEBUG ("SDA_OFFSET = 0x%x\n", _SDA_BASE_); \ | |
917 | ARC_DEBUG ("SDA_SET = %d\n", reloc_data.sdata_begin_symbol_vma_set); \ | |
918 | ARC_DEBUG ("GOT_OFFSET = 0x%x\n", GOT); \ | |
919 | ARC_DEBUG ("relocation = 0x%08x\n", relocation); \ | |
920 | ARC_DEBUG ("before = 0x%08x\n", (unsigned int) insn); \ | |
921 | ARC_DEBUG ("data = 0x%08x (%u) (%d)\n", (unsigned int) relocation, (unsigned int) relocation, (int) relocation); \ | |
922 | } | |
923 | ||
924 | #define PRINT_DEBUG_RELOC_INFO_AFTER \ | |
925 | { \ | |
926 | ARC_DEBUG ("after = 0x%08x\n", (unsigned int) insn); \ | |
927 | } | |
928 | ||
886a2506 NC |
929 | #define ARC_RELOC_HOWTO(TYPE, VALUE, SIZE, BITSIZE, RELOC_FUNCTION, OVERFLOW, FORMULA) \ |
930 | case R_##TYPE: \ | |
931 | { \ | |
094fb063 | 932 | bfd_signed_vma bitsize ATTRIBUTE_UNUSED = BITSIZE; \ |
886a2506 | 933 | relocation = FORMULA ; \ |
094fb063 | 934 | PRINT_DEBUG_RELOC_INFO_BEFORE (#FORMULA, #TYPE); \ |
72f3b6aa | 935 | insn = middle_endian_convert (insn, IS_ME (#FORMULA, abfd)); \ |
094fb063 | 936 | insn = (* get_replace_function (abfd, TYPE)) (insn, relocation); \ |
72f3b6aa | 937 | insn = middle_endian_convert (insn, IS_ME (#FORMULA, abfd)); \ |
34e967a5 | 938 | PRINT_DEBUG_RELOC_INFO_AFTER \ |
886a2506 NC |
939 | } \ |
940 | break; | |
941 | ||
942 | static bfd_reloc_status_type | |
34e967a5 MC |
943 | arc_do_relocation (bfd_byte * contents, |
944 | struct arc_relocation_data reloc_data, | |
945 | struct bfd_link_info *info) | |
886a2506 | 946 | { |
094fb063 | 947 | bfd_signed_vma relocation = 0; |
886a2506 NC |
948 | bfd_vma insn; |
949 | bfd_vma orig_insn ATTRIBUTE_UNUSED; | |
72f3b6aa | 950 | bfd * abfd = reloc_data.input_section->owner; |
34e967a5 | 951 | struct elf_link_hash_table *htab ATTRIBUTE_UNUSED = elf_hash_table (info); |
4b0c052e | 952 | bfd_reloc_status_type flag; |
886a2506 NC |
953 | |
954 | if (reloc_data.should_relocate == FALSE) | |
34e967a5 | 955 | return bfd_reloc_ok; |
886a2506 NC |
956 | |
957 | switch (reloc_data.howto->size) | |
958 | { | |
959 | case 2: | |
72f3b6aa | 960 | insn = arc_bfd_get_32 (abfd, |
886a2506 NC |
961 | contents + reloc_data.reloc_offset, |
962 | reloc_data.input_section); | |
963 | break; | |
964 | case 1: | |
72f3b6aa CZ |
965 | insn = arc_bfd_get_16 (abfd, |
966 | contents + reloc_data.reloc_offset, | |
967 | reloc_data.input_section); | |
968 | break; | |
886a2506 | 969 | case 0: |
72f3b6aa | 970 | insn = arc_bfd_get_8 (abfd, |
886a2506 NC |
971 | contents + reloc_data.reloc_offset, |
972 | reloc_data.input_section); | |
973 | break; | |
974 | default: | |
975 | insn = 0; | |
976 | BFD_ASSERT (0); | |
977 | break; | |
978 | } | |
979 | ||
980 | orig_insn = insn; | |
981 | ||
982 | switch (reloc_data.howto->type) | |
983 | { | |
34e967a5 | 984 | #include "elf/arc-reloc.def" |
886a2506 NC |
985 | |
986 | default: | |
987 | BFD_ASSERT (0); | |
988 | break; | |
989 | } | |
990 | ||
991 | /* Check for relocation overflow. */ | |
992 | if (reloc_data.howto->complain_on_overflow != complain_overflow_dont) | |
4b0c052e AB |
993 | flag = bfd_check_overflow (reloc_data.howto->complain_on_overflow, |
994 | reloc_data.howto->bitsize, | |
995 | reloc_data.howto->rightshift, | |
996 | bfd_arch_bits_per_address (abfd), | |
997 | relocation); | |
998 | else | |
999 | flag = arc_special_overflow_checks (reloc_data, relocation, info); | |
886a2506 | 1000 | |
34e967a5 | 1001 | #undef DEBUG_ARC_RELOC |
886a2506 | 1002 | #define DEBUG_ARC_RELOC(A) debug_arc_reloc (A) |
4b0c052e AB |
1003 | if (flag != bfd_reloc_ok) |
1004 | { | |
1005 | PR_DEBUG ( "Relocation overflows !!!!\n"); | |
886a2506 | 1006 | |
4b0c052e | 1007 | DEBUG_ARC_RELOC (reloc_data); |
886a2506 | 1008 | |
4b0c052e AB |
1009 | PR_DEBUG ( |
1010 | "Relocation value = signed -> %d, unsigned -> %u" | |
1011 | ", hex -> (0x%08x)\n", | |
1012 | (int) relocation, | |
1013 | (unsigned int) relocation, | |
1014 | (unsigned int) relocation); | |
1015 | return flag; | |
886a2506 | 1016 | } |
34e967a5 | 1017 | #undef DEBUG_ARC_RELOC |
886a2506 NC |
1018 | #define DEBUG_ARC_RELOC(A) |
1019 | ||
4b0c052e | 1020 | /* Write updated instruction back to memory. */ |
886a2506 NC |
1021 | switch (reloc_data.howto->size) |
1022 | { | |
1023 | case 2: | |
72f3b6aa | 1024 | arc_bfd_put_32 (abfd, insn, |
886a2506 NC |
1025 | contents + reloc_data.reloc_offset, |
1026 | reloc_data.input_section); | |
1027 | break; | |
1028 | case 1: | |
72f3b6aa CZ |
1029 | arc_bfd_put_16 (abfd, insn, |
1030 | contents + reloc_data.reloc_offset, | |
1031 | reloc_data.input_section); | |
1032 | break; | |
886a2506 | 1033 | case 0: |
72f3b6aa | 1034 | arc_bfd_put_8 (abfd, insn, |
886a2506 NC |
1035 | contents + reloc_data.reloc_offset, |
1036 | reloc_data.input_section); | |
1037 | break; | |
1038 | default: | |
1039 | ARC_DEBUG ("size = %d\n", reloc_data.howto->size); | |
1040 | BFD_ASSERT (0); | |
1041 | break; | |
1042 | } | |
1043 | ||
1044 | return bfd_reloc_ok; | |
1045 | } | |
1046 | #undef S | |
1047 | #undef A | |
1048 | #undef B | |
1049 | #undef G | |
1050 | #undef GOT | |
1051 | #undef L | |
1052 | #undef MES | |
1053 | #undef P | |
1054 | #undef SECTSTAR | |
1055 | #undef SECTSTART | |
1056 | #undef _SDA_BASE_ | |
1057 | #undef none | |
1058 | ||
1059 | #undef ARC_RELOC_HOWTO | |
1060 | ||
34e967a5 MC |
1061 | static struct got_entry ** |
1062 | arc_get_local_got_ents (bfd * abfd) | |
886a2506 | 1063 | { |
34e967a5 | 1064 | static struct got_entry **local_got_ents = NULL; |
886a2506 | 1065 | |
34e967a5 | 1066 | if (local_got_ents == NULL) |
886a2506 NC |
1067 | { |
1068 | size_t size; | |
886a2506 NC |
1069 | Elf_Internal_Shdr *symtab_hdr = &((elf_tdata (abfd))->symtab_hdr); |
1070 | ||
1071 | size = symtab_hdr->sh_info * sizeof (bfd_vma); | |
34e967a5 MC |
1072 | local_got_ents = (struct got_entry **) |
1073 | bfd_alloc (abfd, sizeof(struct got_entry *) * size); | |
1074 | if (local_got_ents == NULL) | |
886a2506 | 1075 | return FALSE; |
34e967a5 MC |
1076 | |
1077 | memset (local_got_ents, 0, sizeof(struct got_entry *) * size); | |
1078 | elf_local_got_ents (abfd) = local_got_ents; | |
886a2506 NC |
1079 | } |
1080 | ||
34e967a5 | 1081 | return local_got_ents; |
886a2506 NC |
1082 | } |
1083 | ||
886a2506 NC |
1084 | /* Relocate an arc ELF section. |
1085 | Function : elf_arc_relocate_section | |
1086 | Brief : Relocate an arc section, by handling all the relocations | |
34e967a5 | 1087 | appearing in that section. |
886a2506 | 1088 | Args : output_bfd : The bfd being written to. |
34e967a5 MC |
1089 | info : Link information. |
1090 | input_bfd : The input bfd. | |
1091 | input_section : The section being relocated. | |
1092 | contents : contents of the section being relocated. | |
1093 | relocs : List of relocations in the section. | |
1094 | local_syms : is a pointer to the swapped in local symbols. | |
1095 | local_section : is an array giving the section in the input file | |
1096 | corresponding to the st_shndx field of each | |
1097 | local symbol. */ | |
886a2506 | 1098 | static bfd_boolean |
34e967a5 | 1099 | elf_arc_relocate_section (bfd * output_bfd, |
886a2506 | 1100 | struct bfd_link_info * info, |
34e967a5 MC |
1101 | bfd * input_bfd, |
1102 | asection * input_section, | |
1103 | bfd_byte * contents, | |
886a2506 NC |
1104 | Elf_Internal_Rela * relocs, |
1105 | Elf_Internal_Sym * local_syms, | |
34e967a5 | 1106 | asection ** local_sections) |
886a2506 | 1107 | { |
34e967a5 | 1108 | Elf_Internal_Shdr * symtab_hdr; |
886a2506 | 1109 | struct elf_link_hash_entry ** sym_hashes; |
34e967a5 MC |
1110 | struct got_entry ** local_got_ents; |
1111 | Elf_Internal_Rela * rel; | |
3c8adaca | 1112 | Elf_Internal_Rela * wrel; |
34e967a5 MC |
1113 | Elf_Internal_Rela * relend; |
1114 | struct elf_link_hash_table *htab = elf_hash_table (info); | |
886a2506 NC |
1115 | |
1116 | symtab_hdr = &((elf_tdata (input_bfd))->symtab_hdr); | |
1117 | sym_hashes = elf_sym_hashes (input_bfd); | |
1118 | ||
3c8adaca | 1119 | rel = wrel = relocs; |
886a2506 | 1120 | relend = relocs + input_section->reloc_count; |
3c8adaca | 1121 | for (; rel < relend; wrel++, rel++) |
886a2506 NC |
1122 | { |
1123 | enum elf_arc_reloc_type r_type; | |
34e967a5 MC |
1124 | reloc_howto_type * howto; |
1125 | unsigned long r_symndx; | |
886a2506 | 1126 | struct elf_link_hash_entry * h; |
34e967a5 MC |
1127 | Elf_Internal_Sym * sym; |
1128 | asection * sec; | |
1129 | struct elf_link_hash_entry *h2; | |
886a2506 NC |
1130 | |
1131 | struct arc_relocation_data reloc_data = | |
1132 | { | |
34e967a5 MC |
1133 | .reloc_offset = 0, |
1134 | .reloc_addend = 0, | |
1135 | .got_offset_value = 0, | |
1136 | .sym_value = 0, | |
1137 | .sym_section = NULL, | |
1138 | .howto = NULL, | |
1139 | .input_section = NULL, | |
1140 | .sdata_begin_symbol_vma = 0, | |
1141 | .sdata_begin_symbol_vma_set = FALSE, | |
1142 | .got_symbol_vma = 0, | |
1143 | .should_relocate = FALSE | |
886a2506 NC |
1144 | }; |
1145 | ||
34e967a5 MC |
1146 | r_type = ELF32_R_TYPE (rel->r_info); |
1147 | ||
1148 | if (r_type >= (int) R_ARC_max) | |
1149 | { | |
1150 | bfd_set_error (bfd_error_bad_value); | |
1151 | return FALSE; | |
1152 | } | |
3c8adaca | 1153 | howto = arc_elf_howto (r_type); |
34e967a5 MC |
1154 | |
1155 | r_symndx = ELF32_R_SYM (rel->r_info); | |
1156 | ||
1157 | /* If we are generating another .o file and the symbol in not | |
1158 | local, skip this relocation. */ | |
1159 | if (bfd_link_relocatable (info)) | |
1160 | { | |
1161 | /* This is a relocateable link. We don't have to change | |
1162 | anything, unless the reloc is against a section symbol, | |
1163 | in which case we have to adjust according to where the | |
1164 | section symbol winds up in the output section. */ | |
1165 | ||
1166 | /* Checks if this is a local symbol and thus the reloc | |
1167 | might (will??) be against a section symbol. */ | |
1168 | if (r_symndx < symtab_hdr->sh_info) | |
1169 | { | |
1170 | sym = local_syms + r_symndx; | |
1171 | if (ELF_ST_TYPE (sym->st_info) == STT_SECTION) | |
1172 | { | |
1173 | sec = local_sections[r_symndx]; | |
1174 | ||
1175 | /* for RELA relocs.Just adjust the addend | |
1176 | value in the relocation entry. */ | |
1177 | rel->r_addend += sec->output_offset + sym->st_value; | |
1178 | ||
1179 | BFD_DEBUG_PIC ( | |
1180 | PR_DEBUG ("local symbols reloc " | |
1181 | "(section=%d %s) seen in %s\n", | |
1182 | r_symndx, | |
1183 | local_sections[r_symndx]->name, | |
1184 | __PRETTY_FUNCTION__) | |
1185 | ); | |
1186 | } | |
1187 | } | |
34e967a5 | 1188 | } |
886a2506 NC |
1189 | |
1190 | h2 = elf_link_hash_lookup (elf_hash_table (info), "__SDATA_BEGIN__", | |
1191 | FALSE, FALSE, TRUE); | |
1192 | ||
1193 | if (reloc_data.sdata_begin_symbol_vma_set == FALSE | |
34e967a5 MC |
1194 | && h2 != NULL && h2->root.type != bfd_link_hash_undefined |
1195 | && h2->root.u.def.section->output_section != NULL) | |
1196 | /* TODO: Verify this condition. */ | |
886a2506 NC |
1197 | { |
1198 | reloc_data.sdata_begin_symbol_vma = | |
1199 | (h2->root.u.def.value + | |
1200 | h2->root.u.def.section->output_section->vma); | |
1201 | reloc_data.sdata_begin_symbol_vma_set = TRUE; | |
1202 | } | |
1203 | ||
886a2506 NC |
1204 | reloc_data.input_section = input_section; |
1205 | reloc_data.howto = howto; | |
1206 | reloc_data.reloc_offset = rel->r_offset; | |
1207 | reloc_data.reloc_addend = rel->r_addend; | |
1208 | ||
886a2506 NC |
1209 | /* This is a final link. */ |
1210 | h = NULL; | |
1211 | sym = NULL; | |
1212 | sec = NULL; | |
1213 | ||
1214 | if (r_symndx < symtab_hdr->sh_info) /* A local symbol. */ | |
1215 | { | |
1216 | sym = local_syms + r_symndx; | |
1217 | sec = local_sections[r_symndx]; | |
3c8adaca CZ |
1218 | } |
1219 | else | |
1220 | { | |
1221 | /* TODO: This code is repeated from below. We should | |
1222 | clean it and remove duplications. | |
1223 | Sec is used check for discarded sections. | |
1224 | Need to redesign code below. */ | |
1225 | ||
1226 | /* Get the symbol's entry in the symtab. */ | |
1227 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
1228 | ||
1229 | while (h->root.type == bfd_link_hash_indirect | |
1230 | || h->root.type == bfd_link_hash_warning) | |
1231 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
1232 | ||
1233 | /* If we have encountered a definition for this symbol. */ | |
1234 | if (h->root.type == bfd_link_hash_defined | |
1235 | || h->root.type == bfd_link_hash_defweak) | |
1236 | { | |
1237 | reloc_data.sym_value = h->root.u.def.value; | |
1238 | sec = h->root.u.def.section; | |
1239 | } | |
1240 | } | |
1241 | ||
1242 | /* Clean relocs for symbols in discarded sections. */ | |
1243 | if (sec != NULL && discarded_section (sec)) | |
1244 | { | |
1245 | _bfd_clear_contents (howto, input_bfd, input_section, | |
1246 | contents + rel->r_offset); | |
1247 | rel->r_offset = rel->r_offset; | |
1248 | rel->r_info = 0; | |
1249 | rel->r_addend = 0; | |
1250 | ||
1251 | /* For ld -r, remove relocations in debug sections against | |
1252 | sections defined in discarded sections. Not done for | |
1253 | eh_frame editing code expects to be present. */ | |
1254 | if (bfd_link_relocatable (info) | |
1255 | && (input_section->flags & SEC_DEBUGGING)) | |
1256 | wrel--; | |
1257 | ||
1258 | continue; | |
1259 | } | |
1260 | ||
1261 | if (bfd_link_relocatable (info)) | |
1262 | { | |
1263 | if (wrel != rel) | |
1264 | *wrel = *rel; | |
1265 | continue; | |
1266 | } | |
1267 | ||
1268 | if (r_symndx < symtab_hdr->sh_info) /* A local symbol. */ | |
1269 | { | |
1270 | struct got_entry *entry; | |
1271 | ||
1272 | local_got_ents = arc_get_local_got_ents (output_bfd); | |
1273 | entry = local_got_ents[r_symndx]; | |
886a2506 NC |
1274 | |
1275 | reloc_data.sym_value = sym->st_value; | |
1276 | reloc_data.sym_section = sec; | |
4b0c052e | 1277 | reloc_data.symbol_name = |
3c8adaca CZ |
1278 | bfd_elf_string_from_elf_section (input_bfd, |
1279 | symtab_hdr->sh_link, | |
1280 | sym->st_name); | |
886a2506 | 1281 | |
841fdfcd CZ |
1282 | /* Mergeable section handling. */ |
1283 | if ((sec->flags & SEC_MERGE) | |
1284 | && ELF_ST_TYPE (sym->st_info) == STT_SECTION) | |
1285 | { | |
1286 | asection *msec; | |
1287 | msec = sec; | |
1288 | rel->r_addend = _bfd_elf_rel_local_sym (output_bfd, sym, | |
1289 | &msec, rel->r_addend); | |
1290 | rel->r_addend -= (sec->output_section->vma | |
1291 | + sec->output_offset | |
1292 | + sym->st_value); | |
1293 | rel->r_addend += msec->output_section->vma + msec->output_offset; | |
1294 | ||
1295 | reloc_data.reloc_addend = rel->r_addend; | |
1296 | } | |
1297 | ||
34e967a5 MC |
1298 | if ((is_reloc_for_GOT (howto) |
1299 | || is_reloc_for_TLS (howto)) && entry != NULL) | |
1300 | { | |
1301 | if (is_reloc_for_TLS (howto)) | |
1302 | while (entry->type == GOT_NORMAL && entry->next != NULL) | |
1303 | entry = entry->next; | |
1304 | ||
1305 | if (is_reloc_for_GOT (howto)) | |
1306 | while (entry->type != GOT_NORMAL && entry->next != NULL) | |
1307 | entry = entry->next; | |
1308 | ||
1309 | if (entry->type == GOT_TLS_GD && entry->processed == FALSE) | |
1310 | { | |
1311 | bfd_vma sym_vma = sym->st_value | |
1312 | + sec->output_section->vma | |
1313 | + sec->output_offset; | |
1314 | ||
1315 | /* Create dynamic relocation for local sym. */ | |
1316 | ADD_RELA (output_bfd, got, entry->offset, 0, | |
1317 | R_ARC_TLS_DTPMOD, 0); | |
1318 | ADD_RELA (output_bfd, got, entry->offset+4, 0, | |
1319 | R_ARC_TLS_DTPOFF, 0); | |
1320 | ||
1321 | bfd_vma sec_vma = sec->output_section->vma | |
1322 | + sec->output_offset; | |
1323 | bfd_put_32 (output_bfd, sym_vma - sec_vma, | |
1324 | htab->sgot->contents + entry->offset + 4); | |
1325 | ||
1326 | ARC_DEBUG ("arc_info: FIXED -> GOT_TLS_GD value " | |
1327 | "= 0x%x @ 0x%x, for symbol %s\n", | |
1328 | sym_vma - sec_vma, | |
1329 | htab->sgot->contents + entry->offset + 4, | |
1330 | "(local)"); | |
1331 | ||
1332 | entry->processed = TRUE; | |
1333 | } | |
1334 | if (entry->type == GOT_TLS_IE && entry->processed == FALSE) | |
1335 | { | |
1336 | bfd_vma sym_vma = sym->st_value | |
1337 | + sec->output_section->vma | |
1338 | + sec->output_offset; | |
1339 | bfd_vma sec_vma = htab->tls_sec->output_section->vma; | |
1340 | bfd_put_32 (output_bfd, sym_vma - sec_vma, | |
1341 | htab->sgot->contents + entry->offset); | |
1342 | /* TODO: Check if this type of relocs is the cause | |
1343 | for all the ARC_NONE dynamic relocs. */ | |
1344 | ||
1345 | ARC_DEBUG ("arc_info: FIXED -> GOT_TLS_IE value = " | |
1346 | "0x%x @ 0x%x, for symbol %s\n", | |
1347 | sym_vma - sec_vma, | |
1348 | htab->sgot->contents + entry->offset, | |
1349 | "(local)"); | |
1350 | ||
1351 | entry->processed = TRUE; | |
1352 | } | |
1353 | if (entry->type == GOT_NORMAL && entry->processed == FALSE) | |
1354 | { | |
1355 | bfd_vma sec_vma = reloc_data.sym_section->output_section->vma | |
1356 | + reloc_data.sym_section->output_offset; | |
1357 | ||
1358 | bfd_put_32 (output_bfd, reloc_data.sym_value + sec_vma, | |
1359 | htab->sgot->contents + entry->offset); | |
1360 | ||
1361 | ARC_DEBUG ("arc_info: PATCHED: 0x%08x @ 0x%08x for " | |
1362 | "sym %s in got offset 0x%x\n", | |
1363 | reloc_data.sym_value + sec_vma, | |
1364 | htab->sgot->output_section->vma | |
1365 | + htab->sgot->output_offset + entry->offset, | |
1366 | "(local)", | |
1367 | entry->offset); | |
1368 | entry->processed = TRUE; | |
1369 | } | |
1370 | ||
1371 | reloc_data.got_offset_value = entry->offset; | |
1372 | ARC_DEBUG ("arc_info: GOT_ENTRY = %d, offset = 0x%x, " | |
1373 | "vma = 0x%x for symbol %s\n", | |
1374 | entry->type, entry->offset, | |
1375 | htab->sgot->output_section->vma | |
1376 | + htab->sgot->output_offset + entry->offset, | |
1377 | "(local)"); | |
1378 | } | |
1379 | ||
1380 | BFD_ASSERT (htab->sgot != NULL || !is_reloc_for_GOT (howto)); | |
1381 | if (htab->sgot != NULL) | |
1382 | reloc_data.got_symbol_vma = htab->sgot->output_section->vma | |
1383 | + htab->sgot->output_offset; | |
886a2506 NC |
1384 | |
1385 | reloc_data.should_relocate = TRUE; | |
1386 | } | |
1387 | else /* Global symbol. */ | |
1388 | { | |
1389 | /* Get the symbol's entry in the symtab. */ | |
1390 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
1391 | ||
1392 | while (h->root.type == bfd_link_hash_indirect | |
1393 | || h->root.type == bfd_link_hash_warning) | |
1394 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
1395 | ||
3c8adaca CZ |
1396 | /* TODO: Need to validate what was the intention. */ |
1397 | /* BFD_ASSERT ((h->dynindx == -1) || (h->forced_local != 0)); */ | |
4b0c052e | 1398 | reloc_data.symbol_name = h->root.root.string; |
3c8adaca | 1399 | |
886a2506 NC |
1400 | /* If we have encountered a definition for this symbol. */ |
1401 | if (h->root.type == bfd_link_hash_defined | |
1402 | || h->root.type == bfd_link_hash_defweak) | |
1403 | { | |
1404 | reloc_data.sym_value = h->root.u.def.value; | |
1405 | reloc_data.sym_section = h->root.u.def.section; | |
1406 | ||
1407 | reloc_data.should_relocate = TRUE; | |
1408 | ||
34e967a5 | 1409 | if (is_reloc_for_GOT (howto) && !bfd_link_pic (info)) |
886a2506 | 1410 | { |
34e967a5 MC |
1411 | /* TODO: Change it to use arc_do_relocation with |
1412 | ARC_32 reloc. Try to use ADD_RELA macro. */ | |
886a2506 NC |
1413 | bfd_vma relocation = |
1414 | reloc_data.sym_value + reloc_data.reloc_addend | |
34e967a5 MC |
1415 | + (reloc_data.sym_section->output_section != NULL ? |
1416 | (reloc_data.sym_section->output_offset | |
1417 | + reloc_data.sym_section->output_section->vma) | |
1418 | : 0); | |
1419 | ||
1420 | BFD_ASSERT (h->got.glist); | |
1421 | bfd_vma got_offset = h->got.glist->offset; | |
1422 | bfd_put_32 (output_bfd, relocation, | |
1423 | htab->sgot->contents + got_offset); | |
1424 | } | |
1425 | if (is_reloc_for_PLT (howto) && h->plt.offset != (bfd_vma) -1) | |
1426 | { | |
1427 | /* TODO: This is repeated up here. */ | |
1428 | reloc_data.sym_value = h->plt.offset; | |
1429 | reloc_data.sym_section = htab->splt; | |
886a2506 NC |
1430 | } |
1431 | } | |
1432 | else if (h->root.type == bfd_link_hash_undefweak) | |
1433 | { | |
1434 | /* Is weak symbol and has no definition. */ | |
34e967a5 MC |
1435 | if (is_reloc_for_GOT (howto)) |
1436 | { | |
1437 | reloc_data.sym_value = h->root.u.def.value; | |
1438 | reloc_data.sym_section = htab->sgot; | |
1439 | reloc_data.should_relocate = TRUE; | |
1440 | } | |
1441 | else if (is_reloc_for_PLT (howto) | |
1442 | && h->plt.offset != (bfd_vma) -1) | |
1443 | { | |
1444 | /* TODO: This is repeated up here. */ | |
1445 | reloc_data.sym_value = h->plt.offset; | |
1446 | reloc_data.sym_section = htab->splt; | |
1447 | reloc_data.should_relocate = TRUE; | |
1448 | } | |
1449 | else | |
1450 | continue; | |
886a2506 NC |
1451 | } |
1452 | else | |
1453 | { | |
1454 | if (is_reloc_for_GOT (howto)) | |
1455 | { | |
886a2506 | 1456 | reloc_data.sym_value = h->root.u.def.value; |
34e967a5 | 1457 | reloc_data.sym_section = htab->sgot; |
886a2506 NC |
1458 | |
1459 | reloc_data.should_relocate = TRUE; | |
1460 | } | |
1461 | else if (is_reloc_for_PLT (howto)) | |
1462 | { | |
7e458899 CZ |
1463 | /* Fail if it is linking for PIE and the symbol is |
1464 | undefined. */ | |
1a72702b AM |
1465 | if (bfd_link_executable (info)) |
1466 | (*info->callbacks->undefined_symbol) | |
1467 | (info, h->root.root.string, input_bfd, input_section, | |
1468 | rel->r_offset, TRUE); | |
886a2506 | 1469 | reloc_data.sym_value = h->plt.offset; |
34e967a5 | 1470 | reloc_data.sym_section = htab->splt; |
886a2506 NC |
1471 | |
1472 | reloc_data.should_relocate = TRUE; | |
1473 | } | |
1a72702b AM |
1474 | else if (!bfd_link_pic (info)) |
1475 | (*info->callbacks->undefined_symbol) | |
1476 | (info, h->root.root.string, input_bfd, input_section, | |
1477 | rel->r_offset, TRUE); | |
886a2506 NC |
1478 | } |
1479 | ||
34e967a5 MC |
1480 | if (h->got.glist != NULL) |
1481 | { | |
1482 | struct got_entry *entry = h->got.glist; | |
1483 | ||
1484 | if (is_reloc_for_GOT (howto) || is_reloc_for_TLS (howto)) | |
1485 | { | |
1486 | if (! elf_hash_table (info)->dynamic_sections_created | |
1487 | || (bfd_link_pic (info) | |
1488 | && SYMBOL_REFERENCES_LOCAL (info, h))) | |
1489 | { | |
1490 | reloc_data.sym_value = h->root.u.def.value; | |
1491 | reloc_data.sym_section = h->root.u.def.section; | |
1492 | ||
1493 | if (is_reloc_for_TLS (howto)) | |
1494 | while (entry->type == GOT_NORMAL && entry->next != NULL) | |
1495 | entry = entry->next; | |
1496 | ||
1497 | if (entry->processed == FALSE | |
1498 | && (entry->type == GOT_TLS_GD | |
1499 | || entry->type == GOT_TLS_IE)) | |
1500 | { | |
1501 | bfd_vma sym_value = h->root.u.def.value | |
1502 | + h->root.u.def.section->output_section->vma | |
1503 | + h->root.u.def.section->output_offset; | |
1504 | ||
1505 | bfd_vma sec_vma = | |
1506 | elf_hash_table (info)->tls_sec->output_section->vma; | |
1507 | ||
1508 | bfd_put_32 (output_bfd, | |
1509 | sym_value - sec_vma, | |
1510 | htab->sgot->contents + entry->offset | |
33cbe6c0 | 1511 | + (entry->existing_entries == TLS_GOT_MOD_AND_OFF ? 4 : 0)); |
34e967a5 MC |
1512 | |
1513 | ARC_DEBUG ("arc_info: FIXED -> %s value = 0x%x " | |
1514 | "@ 0x%x, for symbol %s\n", | |
1515 | (entry->type == GOT_TLS_GD ? "GOT_TLS_GD" : | |
1516 | "GOT_TLS_IE"), | |
1517 | sym_value - sec_vma, | |
1518 | htab->sgot->contents + entry->offset | |
33cbe6c0 | 1519 | + (entry->existing_entries == TLS_GOT_MOD_AND_OFF ? 4 : 0), |
34e967a5 MC |
1520 | h->root.root.string); |
1521 | ||
1522 | entry->processed = TRUE; | |
1523 | } | |
1524 | ||
1525 | if (entry->type == GOT_TLS_IE && entry->processed == FALSE) | |
1526 | { | |
1527 | bfd_vma sec_vma = htab->tls_sec->output_section->vma; | |
1528 | bfd_put_32 (output_bfd, | |
1529 | reloc_data.sym_value - sec_vma, | |
1530 | htab->sgot->contents + entry->offset); | |
1531 | } | |
1532 | ||
1533 | if (entry->type == GOT_NORMAL && entry->processed == FALSE) | |
1534 | { | |
1535 | bfd_vma sec_vma = | |
1536 | reloc_data.sym_section->output_section->vma | |
1537 | + reloc_data.sym_section->output_offset; | |
1538 | ||
1539 | if (h->root.type != bfd_link_hash_undefweak) | |
1540 | { | |
1541 | bfd_put_32 (output_bfd, | |
1542 | reloc_data.sym_value + sec_vma, | |
1543 | htab->sgot->contents + entry->offset); | |
1544 | ||
1545 | ARC_DEBUG ("arc_info: PATCHED: 0x%08x " | |
1546 | "@ 0x%08x for sym %s in got offset 0x%x\n", | |
1547 | reloc_data.sym_value + sec_vma, | |
1548 | htab->sgot->output_section->vma | |
1549 | + htab->sgot->output_offset + entry->offset, | |
1550 | h->root.root.string, | |
1551 | entry->offset); | |
1552 | } | |
1553 | else | |
1554 | { | |
1555 | ARC_DEBUG ("arc_info: PATCHED: NOT_PATCHED " | |
1556 | "@ 0x%08x for sym %s in got offset 0x%x " | |
1557 | "(is undefweak)\n", | |
1558 | htab->sgot->output_section->vma | |
1559 | + htab->sgot->output_offset + entry->offset, | |
1560 | h->root.root.string, | |
1561 | entry->offset); | |
1562 | } | |
1563 | ||
1564 | entry->processed = TRUE; | |
1565 | } | |
1566 | } | |
1567 | } | |
1568 | ||
1569 | reloc_data.got_offset_value = entry->offset; | |
1570 | ||
1571 | ARC_DEBUG ("arc_info: GOT_ENTRY = %d, offset = 0x%x, " | |
1572 | "vma = 0x%x for symbol %s\n", | |
1573 | entry->type, entry->offset, | |
1574 | htab->sgot->output_section->vma | |
1575 | + htab->sgot->output_offset + entry->offset, | |
1576 | h->root.root.string); | |
1577 | } | |
1578 | ||
1579 | BFD_ASSERT (htab->sgot != NULL || !is_reloc_for_GOT (howto)); | |
1580 | if (htab->sgot != NULL) | |
1581 | reloc_data.got_symbol_vma = htab->sgot->output_section->vma | |
1582 | + htab->sgot->output_offset; | |
886a2506 NC |
1583 | } |
1584 | ||
34e967a5 MC |
1585 | switch (r_type) |
1586 | { | |
1587 | case R_ARC_32: | |
1588 | case R_ARC_32_ME: | |
1589 | case R_ARC_PC32: | |
1590 | case R_ARC_32_PCREL: | |
7e458899 | 1591 | if (bfd_link_pic (info) && !bfd_link_pie (info) |
34e967a5 MC |
1592 | && ((r_type != R_ARC_PC32 && r_type != R_ARC_32_PCREL) |
1593 | || (h != NULL | |
1594 | && h->dynindx != -1 | |
1595 | && (!info->symbolic || !h->def_regular)))) | |
1596 | { | |
1597 | Elf_Internal_Rela outrel; | |
1598 | bfd_byte *loc; | |
1599 | bfd_boolean skip = FALSE; | |
1600 | bfd_boolean relocate = FALSE; | |
1601 | asection *sreloc = _bfd_elf_get_dynamic_reloc_section | |
1602 | (input_bfd, input_section, | |
1603 | /*RELA*/ TRUE); | |
1604 | ||
1605 | BFD_ASSERT (sreloc != NULL); | |
1606 | ||
1607 | outrel.r_offset = _bfd_elf_section_offset (output_bfd, | |
1608 | info, | |
1609 | input_section, | |
1610 | rel->r_offset); | |
1611 | if (outrel.r_offset == (bfd_vma) -1) | |
1612 | skip = TRUE; | |
1613 | ||
1614 | outrel.r_addend = rel->r_addend; | |
1615 | outrel.r_offset += (input_section->output_section->vma | |
1616 | + input_section->output_offset); | |
1617 | ||
3c8adaca CZ |
1618 | #define IS_ARC_PCREL_TYPE(TYPE) \ |
1619 | ( (TYPE == R_ARC_PC32) \ | |
1620 | || (TYPE == R_ARC_32_PCREL)) | |
34e967a5 MC |
1621 | if (skip) |
1622 | { | |
1623 | memset (&outrel, 0, sizeof outrel); | |
1624 | relocate = FALSE; | |
1625 | } | |
3c8adaca CZ |
1626 | else if (h != NULL |
1627 | && h->dynindx != -1 | |
1628 | && ((IS_ARC_PCREL_TYPE (r_type)) | |
1629 | || !(bfd_link_executable (info) | |
1630 | || SYMBOLIC_BIND (info, h)) | |
1631 | || ! h->def_regular)) | |
34e967a5 | 1632 | { |
94e5c971 | 1633 | BFD_ASSERT (h != NULL); |
34e967a5 MC |
1634 | if ((input_section->flags & SEC_ALLOC) != 0) |
1635 | relocate = FALSE; | |
1636 | else | |
1637 | relocate = TRUE; | |
94e5c971 CZ |
1638 | |
1639 | BFD_ASSERT (h->dynindx != -1); | |
34e967a5 MC |
1640 | outrel.r_info = ELF32_R_INFO (h->dynindx, r_type); |
1641 | } | |
1642 | else | |
1643 | { | |
1644 | /* Handle local symbols, they either do not have a | |
1645 | global hash table entry (h == NULL), or are | |
1646 | forced local due to a version script | |
1647 | (h->forced_local), or the third condition is | |
1648 | legacy, it appears to say something like, for | |
1649 | links where we are pre-binding the symbols, or | |
1650 | there's not an entry for this symbol in the | |
1651 | dynamic symbol table, and it's a regular symbol | |
1652 | not defined in a shared object, then treat the | |
1653 | symbol as local, resolve it now. */ | |
3c8adaca CZ |
1654 | relocate = TRUE; |
1655 | /* outrel.r_addend = 0; */ | |
1656 | outrel.r_info = ELF32_R_INFO (0, R_ARC_RELATIVE); | |
34e967a5 MC |
1657 | } |
1658 | ||
1659 | BFD_ASSERT (sreloc->contents != 0); | |
1660 | ||
1661 | loc = sreloc->contents; | |
1662 | loc += sreloc->reloc_count * sizeof (Elf32_External_Rela); | |
1663 | sreloc->reloc_count += 1; | |
1664 | ||
1665 | bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); | |
1666 | ||
1667 | if (relocate == FALSE) | |
1668 | continue; | |
1669 | } | |
1670 | break; | |
1671 | default: | |
1672 | break; | |
1673 | } | |
1674 | ||
1675 | if (is_reloc_SDA_relative (howto) | |
1676 | && (reloc_data.sdata_begin_symbol_vma_set == FALSE)) | |
886a2506 NC |
1677 | { |
1678 | (*_bfd_error_handler) | |
1679 | ("Error: Linker symbol __SDATA_BEGIN__ not found"); | |
1680 | bfd_set_error (bfd_error_bad_value); | |
1681 | return FALSE; | |
1682 | } | |
1683 | ||
1684 | DEBUG_ARC_RELOC (reloc_data); | |
34e967a5 MC |
1685 | |
1686 | if (arc_do_relocation (contents, reloc_data, info) != bfd_reloc_ok) | |
886a2506 NC |
1687 | return FALSE; |
1688 | } | |
1689 | ||
1690 | return TRUE; | |
1691 | } | |
1692 | ||
1693 | static struct dynamic_sections | |
1694 | arc_create_dynamic_sections (bfd * abfd, struct bfd_link_info *info) | |
1695 | { | |
34e967a5 MC |
1696 | struct elf_link_hash_table *htab; |
1697 | bfd *dynobj; | |
886a2506 | 1698 | struct dynamic_sections ds = |
886a2506 | 1699 | { |
34e967a5 MC |
1700 | .initialized = FALSE, |
1701 | .sgot = NULL, | |
1702 | .srelgot = NULL, | |
1703 | .sgotplt = NULL, | |
1704 | .srelgotplt = NULL, | |
1705 | .sdyn = NULL, | |
1706 | .splt = NULL, | |
1707 | .srelplt = NULL | |
1708 | }; | |
1709 | ||
1710 | htab = elf_hash_table (info); | |
1711 | BFD_ASSERT (htab); | |
1712 | ||
1713 | /* Create dynamic sections for relocatable executables so that we | |
1714 | can copy relocations. */ | |
1715 | if (! htab->dynamic_sections_created && bfd_link_pic (info)) | |
1716 | { | |
1717 | if (! _bfd_elf_link_create_dynamic_sections (abfd, info)) | |
1718 | BFD_ASSERT (0); | |
886a2506 | 1719 | } |
886a2506 | 1720 | |
34e967a5 | 1721 | dynobj = (elf_hash_table (info))->dynobj; |
886a2506 | 1722 | |
34e967a5 | 1723 | if (dynobj) |
886a2506 | 1724 | { |
34e967a5 MC |
1725 | ds.sgot = htab->sgot; |
1726 | ds.srelgot = htab->srelgot; | |
886a2506 | 1727 | |
34e967a5 MC |
1728 | ds.sgotplt = bfd_get_section_by_name (dynobj, ".got.plt"); |
1729 | ds.srelgotplt = ds.srelplt; | |
886a2506 | 1730 | |
34e967a5 MC |
1731 | ds.splt = bfd_get_section_by_name (dynobj, ".plt"); |
1732 | ds.srelplt = bfd_get_section_by_name (dynobj, ".rela.plt"); | |
1733 | } | |
1734 | ||
1735 | if (htab->dynamic_sections_created) | |
1736 | { | |
1737 | ds.sdyn = bfd_get_section_by_name (dynobj, ".dynamic"); | |
1738 | } | |
886a2506 NC |
1739 | |
1740 | ds.initialized = TRUE; | |
1741 | ||
1742 | return ds; | |
1743 | } | |
1744 | ||
34e967a5 MC |
1745 | #define ADD_SYMBOL_REF_SEC_AND_RELOC(SECNAME, COND_FOR_RELOC, H) \ |
1746 | htab->s##SECNAME->size; \ | |
1747 | { \ | |
1748 | if (COND_FOR_RELOC) \ | |
1749 | { \ | |
1750 | htab->srel##SECNAME->size += sizeof (Elf32_External_Rela); \ | |
1751 | ARC_DEBUG ("arc_info: Added reloc space in " \ | |
1752 | #SECNAME " section at " __FILE__ \ | |
1753 | ":%d for symbol\n", \ | |
1754 | __LINE__, name_for_global_symbol (H)); \ | |
1755 | } \ | |
1756 | if (H) \ | |
1757 | if (h->dynindx == -1 && !h->forced_local) \ | |
1758 | if (! bfd_elf_link_record_dynamic_symbol (info, H)) \ | |
1759 | return FALSE; \ | |
1760 | htab->s##SECNAME->size += 4; \ | |
1761 | } | |
886a2506 NC |
1762 | |
1763 | static bfd_boolean | |
34e967a5 | 1764 | elf_arc_check_relocs (bfd * abfd, |
886a2506 | 1765 | struct bfd_link_info * info, |
34e967a5 | 1766 | asection * sec, |
886a2506 NC |
1767 | const Elf_Internal_Rela * relocs) |
1768 | { | |
34e967a5 MC |
1769 | Elf_Internal_Shdr * symtab_hdr; |
1770 | struct elf_link_hash_entry ** sym_hashes; | |
1771 | struct got_entry ** local_got_ents; | |
1772 | const Elf_Internal_Rela * rel; | |
1773 | const Elf_Internal_Rela * rel_end; | |
1774 | bfd * dynobj; | |
1775 | asection * sreloc = NULL; | |
1776 | struct elf_link_hash_table * htab = elf_hash_table (info); | |
1777 | ||
1778 | if (bfd_link_relocatable (info)) | |
1779 | return TRUE; | |
886a2506 NC |
1780 | |
1781 | dynobj = (elf_hash_table (info))->dynobj; | |
1782 | symtab_hdr = &((elf_tdata (abfd))->symtab_hdr); | |
1783 | sym_hashes = elf_sym_hashes (abfd); | |
34e967a5 | 1784 | local_got_ents = arc_get_local_got_ents (abfd); |
886a2506 NC |
1785 | |
1786 | rel_end = relocs + sec->reloc_count; | |
1787 | for (rel = relocs; rel < rel_end; rel++) | |
1788 | { | |
1789 | enum elf_arc_reloc_type r_type; | |
1790 | reloc_howto_type *howto; | |
1791 | unsigned long r_symndx; | |
1792 | struct elf_link_hash_entry *h; | |
1793 | ||
1794 | r_type = ELF32_R_TYPE (rel->r_info); | |
1795 | ||
1796 | if (r_type >= (int) R_ARC_max) | |
1797 | { | |
1798 | bfd_set_error (bfd_error_bad_value); | |
1799 | return FALSE; | |
1800 | } | |
3c8adaca | 1801 | howto = arc_elf_howto (r_type); |
34e967a5 MC |
1802 | |
1803 | if (dynobj == NULL | |
1804 | && (is_reloc_for_GOT (howto) == TRUE | |
1805 | || is_reloc_for_TLS (howto) == TRUE)) | |
1806 | { | |
1807 | dynobj = elf_hash_table (info)->dynobj = abfd; | |
1808 | if (! _bfd_elf_create_got_section (abfd, info)) | |
1809 | return FALSE; | |
1810 | } | |
886a2506 NC |
1811 | |
1812 | /* Load symbol information. */ | |
1813 | r_symndx = ELF32_R_SYM (rel->r_info); | |
1814 | if (r_symndx < symtab_hdr->sh_info) /* Is a local symbol. */ | |
1815 | h = NULL; | |
1816 | else /* Global one. */ | |
1817 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
1818 | ||
34e967a5 MC |
1819 | switch (r_type) |
1820 | { | |
1821 | case R_ARC_32: | |
1822 | case R_ARC_32_ME: | |
1823 | /* During shared library creation, these relocs should not | |
1824 | appear in a shared library (as memory will be read only | |
1825 | and the dynamic linker can not resolve these. However | |
1826 | the error should not occur for e.g. debugging or | |
1827 | non-readonly sections. */ | |
1828 | if (bfd_link_dll (info) && !bfd_link_pie (info) | |
1829 | && (sec->flags & SEC_ALLOC) != 0 | |
3c8adaca CZ |
1830 | && (sec->flags & SEC_READONLY) != 0 |
1831 | && ((sec->flags & SEC_CODE) != 0 | |
1832 | || (sec->flags & SEC_DEBUGGING) != 0)) | |
34e967a5 MC |
1833 | { |
1834 | const char *name; | |
1835 | if (h) | |
1836 | name = h->root.root.string; | |
1837 | else | |
1838 | /* bfd_elf_sym_name (abfd, symtab_hdr, isym, NULL); */ | |
1839 | name = "UNKNOWN"; | |
1840 | (*_bfd_error_handler) | |
1841 | (_("\ | |
1842 | %B: relocation %s against `%s' can not be used when making a shared object; recompile with -fPIC"), | |
1843 | abfd, | |
1844 | arc_elf_howto (r_type)->name, | |
1845 | name); | |
1846 | bfd_set_error (bfd_error_bad_value); | |
1847 | return FALSE; | |
1848 | } | |
1849 | ||
1850 | /* In some cases we are not setting the 'non_got_ref' | |
1851 | flag, even though the relocations don't require a GOT | |
1852 | access. We should extend the testing in this area to | |
1853 | ensure that no significant cases are being missed. */ | |
1854 | if (h) | |
1855 | h->non_got_ref = 1; | |
1856 | /* FALLTHROUGH */ | |
1857 | case R_ARC_PC32: | |
1858 | case R_ARC_32_PCREL: | |
7e458899 | 1859 | if (bfd_link_pic (info) && !bfd_link_pie (info) |
34e967a5 MC |
1860 | && ((r_type != R_ARC_PC32 && r_type != R_ARC_32_PCREL) |
1861 | || (h != NULL | |
1862 | && h->dynindx != -1 | |
1863 | && (!info->symbolic || !h->def_regular)))) | |
1864 | { | |
1865 | if (sreloc == NULL) | |
1866 | { | |
1867 | sreloc = _bfd_elf_make_dynamic_reloc_section (sec, dynobj, | |
1868 | 2, abfd, | |
1869 | /*rela*/ | |
1870 | TRUE); | |
1871 | ||
1872 | if (sreloc == NULL) | |
1873 | return FALSE; | |
1874 | } | |
1875 | sreloc->size += sizeof (Elf32_External_Rela); | |
1876 | ||
1877 | } | |
1878 | default: | |
1879 | break; | |
1880 | } | |
1881 | ||
886a2506 NC |
1882 | if (is_reloc_for_PLT (howto) == TRUE) |
1883 | { | |
1884 | if (h == NULL) | |
1885 | continue; | |
1886 | else | |
1887 | h->needs_plt = 1; | |
1888 | } | |
1889 | ||
1890 | if (is_reloc_for_GOT (howto) == TRUE) | |
1891 | { | |
1892 | if (h == NULL) | |
1893 | { | |
1894 | /* Local symbol. */ | |
34e967a5 MC |
1895 | if (local_got_ents[r_symndx] == NULL) |
1896 | { | |
1897 | bfd_vma offset = | |
1898 | ADD_SYMBOL_REF_SEC_AND_RELOC (got, | |
1899 | bfd_link_pic (info), | |
1900 | NULL); | |
1901 | new_got_entry_to_list (&(local_got_ents[r_symndx]), | |
33cbe6c0 | 1902 | GOT_NORMAL, offset, TLS_GOT_NONE); |
34e967a5 | 1903 | } |
886a2506 NC |
1904 | } |
1905 | else | |
1906 | { | |
1907 | /* Global symbol. */ | |
1908 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
34e967a5 MC |
1909 | if (h->got.glist == NULL) |
1910 | { | |
1911 | bfd_vma offset = | |
1912 | ADD_SYMBOL_REF_SEC_AND_RELOC (got, TRUE, h); | |
1913 | new_got_entry_to_list (&h->got.glist, | |
33cbe6c0 | 1914 | GOT_NORMAL, offset, TLS_GOT_NONE); |
34e967a5 | 1915 | } |
886a2506 NC |
1916 | } |
1917 | } | |
886a2506 | 1918 | |
34e967a5 MC |
1919 | if (is_reloc_for_TLS (howto) == TRUE) |
1920 | { | |
1921 | enum tls_type_e type = GOT_UNKNOWN; | |
886a2506 | 1922 | |
34e967a5 MC |
1923 | switch (r_type) |
1924 | { | |
1925 | case R_ARC_TLS_GD_GOT: | |
1926 | type = GOT_TLS_GD; | |
1927 | break; | |
1928 | case R_ARC_TLS_IE_GOT: | |
1929 | type = GOT_TLS_IE; | |
1930 | break; | |
1931 | default: | |
1932 | break; | |
1933 | } | |
886a2506 | 1934 | |
34e967a5 MC |
1935 | struct got_entry **list = NULL; |
1936 | if (h != NULL) | |
1937 | list = &(h->got.glist); | |
1938 | else | |
1939 | list = &(local_got_ents[r_symndx]); | |
886a2506 | 1940 | |
34e967a5 MC |
1941 | if (type != GOT_UNKNOWN && !symbol_has_entry_of_type (*list, type)) |
1942 | { | |
33cbe6c0 | 1943 | enum tls_got_entries entries = TLS_GOT_NONE; |
34e967a5 MC |
1944 | bfd_vma offset = |
1945 | ADD_SYMBOL_REF_SEC_AND_RELOC (got, TRUE, h); | |
886a2506 | 1946 | |
34e967a5 MC |
1947 | if (type == GOT_TLS_GD) |
1948 | { | |
1949 | bfd_vma ATTRIBUTE_UNUSED notneeded = | |
1950 | ADD_SYMBOL_REF_SEC_AND_RELOC (got, TRUE, h); | |
33cbe6c0 | 1951 | entries = TLS_GOT_MOD_AND_OFF; |
34e967a5 | 1952 | } |
886a2506 | 1953 | |
33cbe6c0 AB |
1954 | if (entries == TLS_GOT_NONE) |
1955 | entries = TLS_GOT_OFF; | |
886a2506 | 1956 | |
34e967a5 MC |
1957 | new_got_entry_to_list (list, type, offset, entries); |
1958 | } | |
1959 | } | |
1960 | } | |
886a2506 | 1961 | |
34e967a5 MC |
1962 | return TRUE; |
1963 | } | |
886a2506 | 1964 | |
34e967a5 | 1965 | #define ELF_DYNAMIC_INTERPRETER "/sbin/ld-uClibc.so" |
886a2506 | 1966 | |
34e967a5 MC |
1967 | static struct plt_version_t * |
1968 | arc_get_plt_version (struct bfd_link_info *info) | |
886a2506 | 1969 | { |
34e967a5 | 1970 | int i; |
886a2506 | 1971 | |
34e967a5 MC |
1972 | for (i = 0; i < 1; i++) |
1973 | { | |
1974 | ARC_DEBUG ("%d: size1 = %d, size2 = %d\n", i, | |
1975 | plt_versions[i].entry_size, | |
1976 | plt_versions[i].elem_size); | |
1977 | } | |
886a2506 | 1978 | |
34e967a5 | 1979 | if (bfd_get_mach (info->output_bfd) == bfd_mach_arc_arcv2) |
886a2506 | 1980 | { |
34e967a5 MC |
1981 | if (bfd_link_pic (info)) |
1982 | return &(plt_versions[ELF_ARCV2_PIC]); | |
1983 | else | |
1984 | return &(plt_versions[ELF_ARCV2_ABS]); | |
1985 | } | |
1986 | else | |
886a2506 | 1987 | { |
34e967a5 MC |
1988 | if (bfd_link_pic (info)) |
1989 | return &(plt_versions[ELF_ARC_PIC]); | |
1990 | else | |
1991 | return &(plt_versions[ELF_ARC_ABS]); | |
886a2506 | 1992 | } |
886a2506 NC |
1993 | } |
1994 | ||
1995 | static bfd_vma | |
1996 | add_symbol_to_plt (struct bfd_link_info *info) | |
1997 | { | |
34e967a5 | 1998 | struct elf_link_hash_table *htab = elf_hash_table (info); |
886a2506 NC |
1999 | bfd_vma ret; |
2000 | ||
34e967a5 | 2001 | struct plt_version_t *plt_data = arc_get_plt_version (info); |
886a2506 | 2002 | |
34e967a5 MC |
2003 | /* If this is the first .plt entry, make room for the special first |
2004 | entry. */ | |
2005 | if (htab->splt->size == 0) | |
2006 | htab->splt->size += plt_data->entry_size; | |
886a2506 | 2007 | |
34e967a5 MC |
2008 | ret = htab->splt->size; |
2009 | ||
2010 | htab->splt->size += plt_data->elem_size; | |
2011 | ARC_DEBUG ("PLT_SIZE = %d\n", htab->splt->size); | |
2012 | ||
2013 | htab->sgotplt->size += 4; | |
2014 | htab->srelplt->size += sizeof (Elf32_External_Rela); | |
886a2506 NC |
2015 | |
2016 | return ret; | |
2017 | } | |
2018 | ||
34e967a5 MC |
2019 | #define PLT_DO_RELOCS_FOR_ENTRY(ABFD, DS, RELOCS) \ |
2020 | plt_do_relocs_for_symbol (ABFD, DS, RELOCS, 0, 0) | |
886a2506 NC |
2021 | |
2022 | static void | |
34e967a5 MC |
2023 | plt_do_relocs_for_symbol (bfd *abfd, |
2024 | struct elf_link_hash_table *htab, | |
2025 | const struct plt_reloc *reloc, | |
886a2506 NC |
2026 | bfd_vma plt_offset, |
2027 | bfd_vma symbol_got_offset) | |
2028 | { | |
2029 | while (SYM_ONLY (reloc->symbol) != LAST_RELOC) | |
2030 | { | |
2031 | bfd_vma relocation = 0; | |
2032 | ||
2033 | switch (SYM_ONLY (reloc->symbol)) | |
2034 | { | |
2035 | case SGOT: | |
2036 | relocation = | |
34e967a5 MC |
2037 | htab->sgotplt->output_section->vma + |
2038 | htab->sgotplt->output_offset + symbol_got_offset; | |
886a2506 NC |
2039 | break; |
2040 | } | |
2041 | relocation += reloc->addend; | |
2042 | ||
34e967a5 MC |
2043 | if (IS_RELATIVE (reloc->symbol)) |
2044 | { | |
2045 | bfd_vma reloc_offset = reloc->offset; | |
2046 | reloc_offset -= (IS_INSN_32 (reloc->symbol)) ? 4 : 0; | |
2047 | reloc_offset -= (IS_INSN_24 (reloc->symbol)) ? 2 : 0; | |
886a2506 | 2048 | |
34e967a5 MC |
2049 | relocation -= htab->splt->output_section->vma |
2050 | + htab->splt->output_offset | |
2051 | + plt_offset + reloc_offset; | |
2052 | } | |
2053 | ||
2054 | /* TODO: being ME is not a property of the relocation but of the | |
2055 | section of which is applying the relocation. */ | |
1e5885b7 | 2056 | if (IS_MIDDLE_ENDIAN (reloc->symbol) && !bfd_big_endian (abfd)) |
886a2506 NC |
2057 | { |
2058 | relocation = | |
2059 | ((relocation & 0xffff0000) >> 16) | | |
2060 | ((relocation & 0xffff) << 16); | |
2061 | } | |
2062 | ||
2063 | switch (reloc->size) | |
2064 | { | |
2065 | case 32: | |
34e967a5 | 2066 | bfd_put_32 (htab->splt->output_section->owner, |
886a2506 | 2067 | relocation, |
34e967a5 | 2068 | htab->splt->contents + plt_offset + reloc->offset); |
886a2506 NC |
2069 | break; |
2070 | } | |
2071 | ||
34e967a5 | 2072 | reloc = &(reloc[1]); /* Jump to next relocation. */ |
886a2506 NC |
2073 | } |
2074 | } | |
2075 | ||
2076 | static void | |
34e967a5 MC |
2077 | relocate_plt_for_symbol (bfd *output_bfd, |
2078 | struct bfd_link_info *info, | |
886a2506 NC |
2079 | struct elf_link_hash_entry *h) |
2080 | { | |
34e967a5 MC |
2081 | struct plt_version_t *plt_data = arc_get_plt_version (info); |
2082 | struct elf_link_hash_table *htab = elf_hash_table (info); | |
886a2506 | 2083 | |
34e967a5 MC |
2084 | bfd_vma plt_index = (h->plt.offset - plt_data->entry_size) |
2085 | / plt_data->elem_size; | |
886a2506 NC |
2086 | bfd_vma got_offset = (plt_index + 3) * 4; |
2087 | ||
34e967a5 MC |
2088 | ARC_DEBUG ("arc_info: PLT_OFFSET = 0x%x, PLT_ENTRY_VMA = 0x%x, \ |
2089 | GOT_ENTRY_OFFSET = 0x%x, GOT_ENTRY_VMA = 0x%x, for symbol %s\n", | |
2090 | h->plt.offset, | |
2091 | htab->splt->output_section->vma | |
2092 | + htab->splt->output_offset | |
2093 | + h->plt.offset, | |
2094 | got_offset, | |
2095 | htab->sgotplt->output_section->vma | |
2096 | + htab->sgotplt->output_offset | |
2097 | + got_offset, | |
2098 | h->root.root.string); | |
2099 | ||
1e5885b7 CZ |
2100 | |
2101 | { | |
2102 | bfd_vma i = 0; | |
2103 | uint16_t *ptr = (uint16_t *) plt_data->elem; | |
2104 | for (i = 0; i < plt_data->elem_size/2; i++) | |
2105 | { | |
2106 | uint16_t data = ptr[i]; | |
2107 | bfd_put_16 (output_bfd, | |
2108 | (bfd_vma) data, | |
2109 | htab->splt->contents + h->plt.offset + (i*2)); | |
2110 | } | |
2111 | } | |
2112 | ||
34e967a5 MC |
2113 | plt_do_relocs_for_symbol (output_bfd, htab, |
2114 | plt_data->elem_relocs, | |
2115 | h->plt.offset, | |
886a2506 | 2116 | got_offset); |
34e967a5 MC |
2117 | |
2118 | /* Fill in the entry in the global offset table. */ | |
2119 | bfd_put_32 (output_bfd, | |
2120 | (bfd_vma) (htab->splt->output_section->vma | |
2121 | + htab->splt->output_offset), | |
2122 | htab->sgotplt->contents + got_offset); | |
2123 | ||
2124 | /* TODO: Fill in the entry in the .rela.plt section. */ | |
2125 | { | |
2126 | Elf_Internal_Rela rel; | |
2127 | bfd_byte *loc; | |
2128 | ||
2129 | rel.r_offset = (htab->sgotplt->output_section->vma | |
2130 | + htab->sgotplt->output_offset | |
2131 | + got_offset); | |
2132 | rel.r_addend = 0; | |
94e5c971 CZ |
2133 | |
2134 | BFD_ASSERT (h->dynindx != -1); | |
34e967a5 MC |
2135 | rel.r_info = ELF32_R_INFO (h->dynindx, R_ARC_JMP_SLOT); |
2136 | ||
2137 | loc = htab->srelplt->contents; | |
2138 | loc += plt_index * sizeof (Elf32_External_Rela); /* relA */ | |
2139 | bfd_elf32_swap_reloca_out (output_bfd, &rel, loc); | |
2140 | } | |
886a2506 NC |
2141 | } |
2142 | ||
2143 | static void | |
34e967a5 MC |
2144 | relocate_plt_for_entry (bfd *abfd, |
2145 | struct bfd_link_info *info) | |
886a2506 | 2146 | { |
34e967a5 MC |
2147 | struct plt_version_t *plt_data = arc_get_plt_version (info); |
2148 | struct elf_link_hash_table *htab = elf_hash_table (info); | |
886a2506 | 2149 | |
1e5885b7 CZ |
2150 | { |
2151 | bfd_vma i = 0; | |
2152 | uint16_t *ptr = (uint16_t *) plt_data->entry; | |
2153 | for (i = 0; i < plt_data->entry_size/2; i++) | |
2154 | { | |
2155 | uint16_t data = ptr[i]; | |
2156 | bfd_put_16 (abfd, | |
2157 | (bfd_vma) data, | |
2158 | htab->splt->contents + (i*2)); | |
2159 | } | |
2160 | } | |
34e967a5 | 2161 | PLT_DO_RELOCS_FOR_ENTRY (abfd, htab, plt_data->entry_relocs); |
886a2506 NC |
2162 | } |
2163 | ||
34e967a5 MC |
2164 | /* Desc : Adjust a symbol defined by a dynamic object and referenced |
2165 | by a regular object. The current definition is in some section of | |
2166 | the dynamic object, but we're not including those sections. We | |
2167 | have to change the definition to something the rest of the link can | |
886a2506 NC |
2168 | understand. */ |
2169 | ||
2170 | static bfd_boolean | |
2171 | elf_arc_adjust_dynamic_symbol (struct bfd_link_info *info, | |
2172 | struct elf_link_hash_entry *h) | |
2173 | { | |
34e967a5 | 2174 | asection *s; |
886a2506 | 2175 | bfd *dynobj = (elf_hash_table (info))->dynobj; |
34e967a5 | 2176 | struct elf_link_hash_table *htab = elf_hash_table (info); |
886a2506 | 2177 | |
34e967a5 MC |
2178 | if (h->type == STT_FUNC |
2179 | || h->type == STT_GNU_IFUNC | |
2180 | || h->needs_plt == 1) | |
886a2506 NC |
2181 | { |
2182 | if (!bfd_link_pic (info) && !h->def_dynamic && !h->ref_dynamic) | |
2183 | { | |
2184 | /* This case can occur if we saw a PLT32 reloc in an input | |
2185 | file, but the symbol was never referred to by a dynamic | |
2186 | object. In such a case, we don't actually need to build | |
2187 | a procedure linkage table, and we can just do a PC32 | |
2188 | reloc instead. */ | |
2189 | BFD_ASSERT (h->needs_plt); | |
2190 | return TRUE; | |
2191 | } | |
2192 | ||
2193 | /* Make sure this symbol is output as a dynamic symbol. */ | |
2194 | if (h->dynindx == -1 && !h->forced_local | |
2195 | && !bfd_elf_link_record_dynamic_symbol (info, h)) | |
2196 | return FALSE; | |
2197 | ||
34e967a5 MC |
2198 | if (bfd_link_pic (info) |
2199 | || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h)) | |
886a2506 NC |
2200 | { |
2201 | bfd_vma loc = add_symbol_to_plt (info); | |
2202 | ||
2203 | if (!bfd_link_pic (info) && !h->def_regular) | |
2204 | { | |
34e967a5 | 2205 | h->root.u.def.section = htab->splt; |
886a2506 NC |
2206 | h->root.u.def.value = loc; |
2207 | } | |
2208 | h->plt.offset = loc; | |
2209 | } | |
34e967a5 MC |
2210 | else |
2211 | { | |
2212 | h->plt.offset = (bfd_vma) -1; | |
2213 | h->needs_plt = 0; | |
2214 | } | |
2215 | return TRUE; | |
886a2506 | 2216 | } |
34e967a5 MC |
2217 | |
2218 | /* If this is a weak symbol, and there is a real definition, the | |
2219 | processor independent code will have arranged for us to see the | |
2220 | real definition first, and we can just use the same value. */ | |
2221 | if (h->u.weakdef != NULL) | |
886a2506 | 2222 | { |
34e967a5 MC |
2223 | BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined |
2224 | || h->u.weakdef->root.type == bfd_link_hash_defweak); | |
2225 | h->root.u.def.section = h->u.weakdef->root.u.def.section; | |
2226 | h->root.u.def.value = h->u.weakdef->root.u.def.value; | |
2227 | return TRUE; | |
886a2506 NC |
2228 | } |
2229 | ||
34e967a5 MC |
2230 | /* This is a reference to a symbol defined by a dynamic object which |
2231 | is not a function. */ | |
2232 | ||
2233 | /* If we are creating a shared library, we must presume that the | |
2234 | only references to the symbol are via the global offset table. | |
2235 | For such cases we need not do anything here; the relocations will | |
2236 | be handled correctly by relocate_section. */ | |
3c8adaca CZ |
2237 | if (!bfd_link_executable (info)) |
2238 | return TRUE; | |
2239 | ||
2240 | /* If there are no non-GOT references, we do not need a copy | |
2241 | relocation. */ | |
2242 | if (!h->non_got_ref) | |
34e967a5 MC |
2243 | return TRUE; |
2244 | ||
3c8adaca CZ |
2245 | /* If -z nocopyreloc was given, we won't generate them either. */ |
2246 | if (info->nocopyreloc) | |
2247 | { | |
2248 | h->non_got_ref = 0; | |
2249 | return TRUE; | |
2250 | } | |
2251 | ||
34e967a5 MC |
2252 | /* We must allocate the symbol in our .dynbss section, which will |
2253 | become part of the .bss section of the executable. There will be | |
2254 | an entry for this symbol in the .dynsym section. The dynamic | |
2255 | object will contain position independent code, so all references | |
2256 | from the dynamic object to this symbol will go through the global | |
2257 | offset table. The dynamic linker will use the .dynsym entry to | |
2258 | determine the address it must put in the global offset table, so | |
2259 | both the dynamic object and the regular object will refer to the | |
2260 | same memory location for the variable. */ | |
2261 | ||
3c8adaca CZ |
2262 | if (htab == NULL) |
2263 | return FALSE; | |
34e967a5 MC |
2264 | |
2265 | /* We must generate a R_ARC_COPY reloc to tell the dynamic linker to | |
2266 | copy the initial value out of the dynamic object and into the | |
2267 | runtime process image. We need to remember the offset into the | |
2268 | .rela.bss section we are going to use. */ | |
2269 | if ((h->root.u.def.section->flags & SEC_ALLOC) != 0) | |
2270 | { | |
2271 | asection *srel; | |
2272 | ||
2273 | srel = bfd_get_section_by_name (dynobj, ".rela.bss"); | |
2274 | BFD_ASSERT (srel != NULL); | |
2275 | srel->size += sizeof (Elf32_External_Rela); | |
2276 | h->needs_copy = 1; | |
2277 | } | |
2278 | ||
3c8adaca CZ |
2279 | s = bfd_get_section_by_name (dynobj, ".dynbss"); |
2280 | BFD_ASSERT (s != NULL); | |
34e967a5 | 2281 | |
3c8adaca | 2282 | return _bfd_elf_adjust_dynamic_copy (info, h, s); |
886a2506 NC |
2283 | } |
2284 | ||
2285 | /* Function : elf_arc_finish_dynamic_symbol | |
2286 | Brief : Finish up dynamic symbol handling. We set the | |
34e967a5 | 2287 | contents of various dynamic sections here. |
886a2506 | 2288 | Args : output_bfd : |
34e967a5 MC |
2289 | info : |
2290 | h : | |
2291 | sym : | |
886a2506 | 2292 | Returns : True/False as the return status. */ |
34e967a5 | 2293 | |
886a2506 NC |
2294 | static bfd_boolean |
2295 | elf_arc_finish_dynamic_symbol (bfd * output_bfd, | |
2296 | struct bfd_link_info *info, | |
2297 | struct elf_link_hash_entry *h, | |
2298 | Elf_Internal_Sym * sym) | |
2299 | { | |
34e967a5 | 2300 | if (h->plt.offset != (bfd_vma) -1) |
886a2506 | 2301 | { |
34e967a5 MC |
2302 | relocate_plt_for_symbol (output_bfd, info, h); |
2303 | ||
2304 | if (!h->def_regular) | |
886a2506 | 2305 | { |
34e967a5 MC |
2306 | /* Mark the symbol as undefined, rather than as defined in |
2307 | the .plt section. Leave the value alone. */ | |
2308 | sym->st_shndx = SHN_UNDEF; | |
886a2506 | 2309 | } |
34e967a5 MC |
2310 | } |
2311 | ||
2312 | if (h->got.glist != NULL) | |
2313 | { | |
2314 | struct got_entry *list = h->got.glist; | |
2315 | ||
2316 | /* Traverse the list of got entries for this symbol. */ | |
2317 | while (list) | |
886a2506 | 2318 | { |
34e967a5 MC |
2319 | bfd_vma got_offset = h->got.glist->offset; |
2320 | ||
2321 | if (list->type == GOT_NORMAL | |
2322 | && list->created_dyn_relocation == FALSE) | |
2323 | { | |
2324 | if (bfd_link_pic (info) | |
2325 | && (info->symbolic || h->dynindx == -1) | |
2326 | && h->def_regular) | |
2327 | { | |
2328 | ADD_RELA (output_bfd, got, got_offset, 0, R_ARC_RELATIVE, 0); | |
2329 | } | |
94e5c971 CZ |
2330 | /* Do not fully understand the side effects of this condition. |
2331 | The relocation space might still being reserved. Perhaps | |
2332 | I should clear its value. */ | |
2333 | else if (h->dynindx != -1) | |
34e967a5 MC |
2334 | { |
2335 | ADD_RELA (output_bfd, got, got_offset, h->dynindx, | |
2336 | R_ARC_GLOB_DAT, 0); | |
2337 | } | |
2338 | list->created_dyn_relocation = TRUE; | |
2339 | } | |
33cbe6c0 | 2340 | else if (list->existing_entries != TLS_GOT_NONE) |
34e967a5 MC |
2341 | { |
2342 | struct elf_link_hash_table *htab = elf_hash_table (info); | |
2343 | enum tls_got_entries e = list->existing_entries; | |
2344 | ||
2345 | BFD_ASSERT (list->type != GOT_TLS_GD | |
33cbe6c0 | 2346 | || list->existing_entries == TLS_GOT_MOD_AND_OFF); |
34e967a5 | 2347 | |
840855c5 | 2348 | bfd_vma dynindx = h->dynindx == -1 ? 0 : h->dynindx; |
33cbe6c0 | 2349 | if (e == TLS_GOT_MOD_AND_OFF || e == TLS_GOT_MOD) |
34e967a5 | 2350 | { |
840855c5 | 2351 | ADD_RELA (output_bfd, got, got_offset, dynindx, |
34e967a5 MC |
2352 | R_ARC_TLS_DTPMOD, 0); |
2353 | ARC_DEBUG ("arc_info: TLS_DYNRELOC: type = %d, \ | |
2354 | GOT_OFFSET = 0x%x, GOT_VMA = 0x%x, INDEX = %d, ADDEND = 0x%x\n", | |
2355 | list->type, | |
2356 | got_offset, | |
2357 | htab->sgot->output_section->vma | |
2358 | + htab->sgot->output_offset + got_offset, | |
840855c5 | 2359 | dynindx, 0); |
34e967a5 | 2360 | } |
33cbe6c0 | 2361 | if (e == TLS_GOT_MOD_AND_OFF || e == TLS_GOT_OFF) |
34e967a5 MC |
2362 | { |
2363 | bfd_vma addend = 0; | |
2364 | if (list->type == GOT_TLS_IE) | |
2365 | addend = bfd_get_32 (output_bfd, | |
2366 | htab->sgot->contents + got_offset); | |
2367 | ||
2368 | ADD_RELA (output_bfd, got, | |
33cbe6c0 | 2369 | got_offset + (e == TLS_GOT_MOD_AND_OFF ? 4 : 0), |
840855c5 | 2370 | dynindx, |
34e967a5 MC |
2371 | (list->type == GOT_TLS_IE ? |
2372 | R_ARC_TLS_TPOFF : R_ARC_TLS_DTPOFF), | |
2373 | addend); | |
2374 | ||
2375 | ARC_DEBUG ("arc_info: TLS_DYNRELOC: type = %d, \ | |
2376 | GOT_OFFSET = 0x%x, GOT_VMA = 0x%x, INDEX = %d, ADDEND = 0x%x\n", | |
2377 | list->type, | |
2378 | got_offset, | |
2379 | htab->sgot->output_section->vma | |
2380 | + htab->sgot->output_offset + got_offset, | |
840855c5 | 2381 | dynindx, addend); |
34e967a5 MC |
2382 | } |
2383 | } | |
2384 | ||
2385 | list = list->next; | |
886a2506 | 2386 | } |
34e967a5 MC |
2387 | |
2388 | h->got.glist = NULL; | |
2389 | } | |
2390 | ||
2391 | if (h->needs_copy) | |
2392 | { | |
2393 | bfd_vma rel_offset = (h->root.u.def.value | |
2394 | + h->root.u.def.section->output_section->vma | |
2395 | + h->root.u.def.section->output_offset); | |
2396 | ||
2397 | asection *srelbss = | |
2398 | bfd_get_section_by_name (h->root.u.def.section->owner, | |
2399 | ".rela.bss"); | |
2400 | ||
23a42089 NC |
2401 | bfd_byte * loc = srelbss->contents |
2402 | + (srelbss->reloc_count * sizeof (Elf32_External_Rela)); | |
34e967a5 MC |
2403 | srelbss->reloc_count++; |
2404 | ||
2405 | Elf_Internal_Rela rel; | |
2406 | rel.r_addend = 0; | |
2407 | rel.r_offset = rel_offset; | |
94e5c971 CZ |
2408 | |
2409 | BFD_ASSERT (h->dynindx != -1); | |
34e967a5 MC |
2410 | rel.r_info = ELF32_R_INFO (h->dynindx, R_ARC_COPY); |
2411 | ||
23a42089 | 2412 | bfd_elf32_swap_reloca_out (output_bfd, &rel, loc); |
886a2506 NC |
2413 | } |
2414 | ||
2415 | /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */ | |
2416 | if (strcmp (h->root.root.string, "_DYNAMIC") == 0 | |
2417 | || strcmp (h->root.root.string, "__DYNAMIC") == 0 | |
2418 | || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0) | |
2419 | sym->st_shndx = SHN_ABS; | |
2420 | ||
2421 | return TRUE; | |
2422 | } | |
2423 | ||
4ade44b7 | 2424 | #define GET_SYMBOL_OR_SECTION(TAG, SYMBOL, SECTION) \ |
34e967a5 MC |
2425 | case TAG: \ |
2426 | if (SYMBOL != NULL) \ | |
4ade44b7 AM |
2427 | h = elf_link_hash_lookup (elf_hash_table (info), \ |
2428 | SYMBOL, FALSE, FALSE, TRUE); \ | |
34e967a5 | 2429 | else if (SECTION != NULL) \ |
4ade44b7 | 2430 | s = bfd_get_linker_section (dynobj, SECTION); \ |
34e967a5 | 2431 | break; |
886a2506 NC |
2432 | |
2433 | /* Function : elf_arc_finish_dynamic_sections | |
2434 | Brief : Finish up the dynamic sections handling. | |
2435 | Args : output_bfd : | |
34e967a5 MC |
2436 | info : |
2437 | h : | |
2438 | sym : | |
886a2506 | 2439 | Returns : True/False as the return status. */ |
34e967a5 | 2440 | |
886a2506 | 2441 | static bfd_boolean |
34e967a5 MC |
2442 | elf_arc_finish_dynamic_sections (bfd * output_bfd, |
2443 | struct bfd_link_info *info) | |
886a2506 NC |
2444 | { |
2445 | struct dynamic_sections ds = arc_create_dynamic_sections (output_bfd, info); | |
34e967a5 | 2446 | struct elf_link_hash_table *htab = elf_hash_table (info); |
886a2506 NC |
2447 | bfd *dynobj = (elf_hash_table (info))->dynobj; |
2448 | ||
2449 | if (ds.sdyn) | |
2450 | { | |
2451 | Elf32_External_Dyn *dyncon, *dynconend; | |
2452 | ||
2453 | dyncon = (Elf32_External_Dyn *) ds.sdyn->contents; | |
2454 | dynconend = | |
34e967a5 | 2455 | (Elf32_External_Dyn *) (ds.sdyn->contents + ds.sdyn->size); |
886a2506 NC |
2456 | for (; dyncon < dynconend; dyncon++) |
2457 | { | |
2458 | Elf_Internal_Dyn internal_dyn; | |
2459 | bfd_boolean do_it = FALSE; | |
2460 | ||
2461 | struct elf_link_hash_entry *h = NULL; | |
2462 | asection *s = NULL; | |
2463 | ||
2464 | bfd_elf32_swap_dyn_in (dynobj, dyncon, &internal_dyn); | |
2465 | ||
2466 | switch (internal_dyn.d_tag) | |
2467 | { | |
4ade44b7 AM |
2468 | GET_SYMBOL_OR_SECTION (DT_INIT, "_init", NULL) |
2469 | GET_SYMBOL_OR_SECTION (DT_FINI, "_fini", NULL) | |
2470 | GET_SYMBOL_OR_SECTION (DT_PLTGOT, NULL, ".plt") | |
2471 | GET_SYMBOL_OR_SECTION (DT_JMPREL, NULL, ".rela.plt") | |
2472 | GET_SYMBOL_OR_SECTION (DT_PLTRELSZ, NULL, ".rela.plt") | |
2473 | GET_SYMBOL_OR_SECTION (DT_RELASZ, NULL, ".rela.plt") | |
2474 | GET_SYMBOL_OR_SECTION (DT_VERSYM, NULL, ".gnu.version") | |
2475 | GET_SYMBOL_OR_SECTION (DT_VERDEF, NULL, ".gnu.version_d") | |
2476 | GET_SYMBOL_OR_SECTION (DT_VERNEED, NULL, ".gnu.version_r") | |
886a2506 NC |
2477 | default: |
2478 | break; | |
2479 | } | |
2480 | ||
34e967a5 | 2481 | /* In case the dynamic symbols should be updated with a symbol. */ |
886a2506 NC |
2482 | if (h != NULL |
2483 | && (h->root.type == bfd_link_hash_defined | |
34e967a5 | 2484 | || h->root.type == bfd_link_hash_defweak)) |
886a2506 NC |
2485 | { |
2486 | asection *asec_ptr; | |
2487 | ||
2488 | internal_dyn.d_un.d_val = h->root.u.def.value; | |
2489 | asec_ptr = h->root.u.def.section; | |
2490 | if (asec_ptr->output_section != NULL) | |
2491 | { | |
2492 | internal_dyn.d_un.d_val += | |
2493 | (asec_ptr->output_section->vma + | |
2494 | asec_ptr->output_offset); | |
2495 | } | |
2496 | else | |
2497 | { | |
34e967a5 MC |
2498 | /* The symbol is imported from another shared |
2499 | library and does not apply to this one. */ | |
886a2506 NC |
2500 | internal_dyn.d_un.d_val = 0; |
2501 | } | |
2502 | do_it = TRUE; | |
2503 | } | |
2504 | else if (s != NULL) /* With a section information. */ | |
2505 | { | |
2506 | switch (internal_dyn.d_tag) | |
2507 | { | |
2508 | case DT_PLTGOT: | |
2509 | case DT_JMPREL: | |
34e967a5 MC |
2510 | case DT_VERSYM: |
2511 | case DT_VERDEF: | |
2512 | case DT_VERNEED: | |
4ade44b7 AM |
2513 | internal_dyn.d_un.d_ptr = (s->output_section->vma |
2514 | + s->output_offset); | |
886a2506 NC |
2515 | do_it = TRUE; |
2516 | break; | |
2517 | ||
2518 | case DT_PLTRELSZ: | |
2519 | internal_dyn.d_un.d_val = s->size; | |
2520 | do_it = TRUE; | |
2521 | break; | |
2522 | ||
2523 | case DT_RELASZ: | |
34e967a5 MC |
2524 | if (s != NULL) |
2525 | internal_dyn.d_un.d_val -= s->size; | |
886a2506 NC |
2526 | do_it = TRUE; |
2527 | break; | |
2528 | ||
2529 | default: | |
2530 | break; | |
2531 | } | |
2532 | } | |
2533 | ||
4ade44b7 | 2534 | if (do_it) |
886a2506 NC |
2535 | bfd_elf32_swap_dyn_out (output_bfd, &internal_dyn, dyncon); |
2536 | } | |
2537 | ||
34e967a5 | 2538 | if (htab->splt->size > 0) |
886a2506 | 2539 | { |
34e967a5 | 2540 | relocate_plt_for_entry (output_bfd, info); |
886a2506 NC |
2541 | } |
2542 | ||
34e967a5 MC |
2543 | /* TODO: Validate this. */ |
2544 | elf_section_data (htab->srelplt->output_section)->this_hdr.sh_entsize | |
2545 | = 0xc; | |
886a2506 NC |
2546 | } |
2547 | ||
2548 | /* Fill in the first three entries in the global offset table. */ | |
34e967a5 | 2549 | if (htab->sgot) |
886a2506 | 2550 | { |
34e967a5 | 2551 | if (htab->sgot->size > 0 || htab->sgotplt->size > 0) |
886a2506 NC |
2552 | { |
2553 | if (ds.sdyn == NULL) | |
2554 | bfd_put_32 (output_bfd, (bfd_vma) 0, | |
34e967a5 | 2555 | htab->sgotplt->contents); |
886a2506 NC |
2556 | else |
2557 | bfd_put_32 (output_bfd, | |
2558 | ds.sdyn->output_section->vma + ds.sdyn->output_offset, | |
34e967a5 MC |
2559 | htab->sgotplt->contents); |
2560 | bfd_put_32 (output_bfd, (bfd_vma) 0, htab->sgotplt->contents + 4); | |
2561 | bfd_put_32 (output_bfd, (bfd_vma) 0, htab->sgotplt->contents + 8); | |
886a2506 NC |
2562 | } |
2563 | } | |
2564 | ||
886a2506 NC |
2565 | return TRUE; |
2566 | } | |
2567 | ||
34e967a5 MC |
2568 | #define ADD_DYNAMIC_SYMBOL(NAME, TAG) \ |
2569 | h = elf_link_hash_lookup (elf_hash_table (info), \ | |
2570 | NAME, FALSE, FALSE, FALSE); \ | |
2571 | if ((h != NULL && (h->ref_regular || h->def_regular))) \ | |
2572 | if (! _bfd_elf_add_dynamic_entry (info, TAG, 0)) \ | |
886a2506 NC |
2573 | return FALSE; |
2574 | ||
2575 | /* Set the sizes of the dynamic sections. */ | |
2576 | static bfd_boolean | |
34e967a5 MC |
2577 | elf_arc_size_dynamic_sections (bfd * output_bfd, |
2578 | struct bfd_link_info *info) | |
886a2506 | 2579 | { |
34e967a5 | 2580 | bfd * dynobj; |
886a2506 | 2581 | asection * s; |
34e967a5 MC |
2582 | bfd_boolean relocs_exist = FALSE; |
2583 | bfd_boolean reltext_exist = FALSE; | |
886a2506 | 2584 | struct dynamic_sections ds = arc_create_dynamic_sections (output_bfd, info); |
34e967a5 | 2585 | struct elf_link_hash_table *htab = elf_hash_table (info); |
886a2506 NC |
2586 | |
2587 | dynobj = (elf_hash_table (info))->dynobj; | |
2588 | BFD_ASSERT (dynobj != NULL); | |
2589 | ||
2590 | if ((elf_hash_table (info))->dynamic_sections_created) | |
2591 | { | |
2592 | struct elf_link_hash_entry *h; | |
2593 | ||
34e967a5 MC |
2594 | /* Set the contents of the .interp section to the |
2595 | interpreter. */ | |
886a2506 NC |
2596 | if (!bfd_link_pic (info)) |
2597 | { | |
2598 | s = bfd_get_section_by_name (dynobj, ".interp"); | |
2599 | BFD_ASSERT (s != NULL); | |
34e967a5 | 2600 | s->size = sizeof (ELF_DYNAMIC_INTERPRETER); |
886a2506 NC |
2601 | s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER; |
2602 | } | |
2603 | ||
34e967a5 MC |
2604 | /* Add some entries to the .dynamic section. We fill in some of |
2605 | the values later, in elf_bfd_final_link, but we must add the | |
2606 | entries now so that we know the final size of the .dynamic | |
2607 | section. Checking if the .init section is present. We also | |
2608 | create DT_INIT and DT_FINI entries if the init_str has been | |
2609 | changed by the user. */ | |
886a2506 NC |
2610 | ADD_DYNAMIC_SYMBOL ("init", DT_INIT); |
2611 | ADD_DYNAMIC_SYMBOL ("fini", DT_FINI); | |
2612 | } | |
2613 | else | |
2614 | { | |
34e967a5 MC |
2615 | /* We may have created entries in the .rela.got section. |
2616 | However, if we are not creating the dynamic sections, we will | |
2617 | not actually use these entries. Reset the size of .rela.got, | |
2618 | which will cause it to get stripped from the output file | |
2619 | below. */ | |
2620 | if (htab->srelgot != NULL) | |
2621 | htab->srelgot->size = 0; | |
886a2506 NC |
2622 | } |
2623 | ||
34e967a5 MC |
2624 | if (htab->splt != NULL && htab->splt->size == 0) |
2625 | htab->splt->flags |= SEC_EXCLUDE; | |
886a2506 NC |
2626 | for (s = dynobj->sections; s != NULL; s = s->next) |
2627 | { | |
34e967a5 | 2628 | if ((s->flags & SEC_LINKER_CREATED) == 0) |
886a2506 NC |
2629 | continue; |
2630 | ||
34e967a5 | 2631 | if (strncmp (s->name, ".rela", 5) == 0) |
886a2506 | 2632 | { |
34e967a5 MC |
2633 | if (s->size == 0) |
2634 | { | |
2635 | s->flags |= SEC_EXCLUDE; | |
2636 | } | |
2637 | else | |
2638 | { | |
2639 | if (strcmp (s->name, ".rela.plt") != 0) | |
2640 | { | |
2641 | const char *outname = | |
2642 | bfd_get_section_name (output_bfd, | |
2643 | htab->srelplt->output_section); | |
2644 | ||
2645 | asection *target = bfd_get_section_by_name (output_bfd, | |
2646 | outname + 4); | |
2647 | ||
2648 | relocs_exist = TRUE; | |
2649 | if (target != NULL && target->size != 0 | |
2650 | && (target->flags & SEC_READONLY) != 0 | |
2651 | && (target->flags & SEC_ALLOC) != 0) | |
2652 | reltext_exist = TRUE; | |
2653 | } | |
2654 | } | |
886a2506 | 2655 | |
34e967a5 MC |
2656 | /* We use the reloc_count field as a counter if we need to |
2657 | copy relocs into the output file. */ | |
2658 | s->reloc_count = 0; | |
886a2506 | 2659 | } |
34e967a5 MC |
2660 | |
2661 | if (strcmp (s->name, ".dynamic") == 0) | |
2662 | continue; | |
2663 | ||
2664 | if (s->size != 0) | |
2665 | s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size); | |
2666 | ||
2667 | if (s->contents == NULL && s->size != 0) | |
2668 | return FALSE; | |
886a2506 NC |
2669 | } |
2670 | ||
2671 | if (ds.sdyn) | |
2672 | { | |
34e967a5 MC |
2673 | /* TODO: Check if this is needed. */ |
2674 | if (!bfd_link_pic (info)) | |
2675 | if (!_bfd_elf_add_dynamic_entry (info, DT_DEBUG, 0)) | |
2676 | return FALSE; | |
2677 | ||
2678 | if (htab->splt && (htab->splt->flags & SEC_EXCLUDE) == 0) | |
886a2506 NC |
2679 | if (!_bfd_elf_add_dynamic_entry (info, DT_PLTGOT, 0) |
2680 | || !_bfd_elf_add_dynamic_entry (info, DT_PLTRELSZ, 0) | |
2681 | || !_bfd_elf_add_dynamic_entry (info, DT_PLTREL, DT_RELA) | |
2682 | || !_bfd_elf_add_dynamic_entry (info, DT_JMPREL, 0) | |
2683 | ) | |
2684 | return FALSE; | |
2685 | ||
2686 | if (relocs_exist == TRUE) | |
2687 | if (!_bfd_elf_add_dynamic_entry (info, DT_RELA, 0) | |
2688 | || !_bfd_elf_add_dynamic_entry (info, DT_RELASZ, 0) | |
2689 | || !_bfd_elf_add_dynamic_entry (info, DT_RELENT, | |
2690 | sizeof (Elf32_External_Rela)) | |
2691 | ) | |
2692 | return FALSE; | |
2693 | ||
2694 | if (reltext_exist == TRUE) | |
2695 | if (!_bfd_elf_add_dynamic_entry (info, DT_TEXTREL, 0)) | |
2696 | return FALSE; | |
2697 | } | |
2698 | ||
2699 | return TRUE; | |
2700 | } | |
2701 | ||
34e967a5 MC |
2702 | const struct elf_size_info arc_elf32_size_info = |
2703 | { | |
2704 | sizeof (Elf32_External_Ehdr), | |
2705 | sizeof (Elf32_External_Phdr), | |
2706 | sizeof (Elf32_External_Shdr), | |
2707 | sizeof (Elf32_External_Rel), | |
2708 | sizeof (Elf32_External_Rela), | |
2709 | sizeof (Elf32_External_Sym), | |
2710 | sizeof (Elf32_External_Dyn), | |
2711 | sizeof (Elf_External_Note), | |
2712 | 4, | |
2713 | 1, | |
2714 | 32, 2, | |
2715 | ELFCLASS32, EV_CURRENT, | |
2716 | bfd_elf32_write_out_phdrs, | |
2717 | bfd_elf32_write_shdrs_and_ehdr, | |
2718 | bfd_elf32_checksum_contents, | |
2719 | bfd_elf32_write_relocs, | |
2720 | bfd_elf32_swap_symbol_in, | |
2721 | bfd_elf32_swap_symbol_out, | |
2722 | bfd_elf32_slurp_reloc_table, | |
2723 | bfd_elf32_slurp_symbol_table, | |
2724 | bfd_elf32_swap_dyn_in, | |
2725 | bfd_elf32_swap_dyn_out, | |
2726 | bfd_elf32_swap_reloc_in, | |
2727 | bfd_elf32_swap_reloc_out, | |
2728 | bfd_elf32_swap_reloca_in, | |
2729 | bfd_elf32_swap_reloca_out | |
2730 | }; | |
2731 | ||
2732 | #define elf_backend_size_info arc_elf32_size_info | |
2733 | ||
2734 | static struct bfd_link_hash_table * | |
2735 | arc_elf_link_hash_table_create (bfd *abfd) | |
2736 | { | |
2737 | struct elf_link_hash_table *htab; | |
2738 | ||
2739 | htab = bfd_zmalloc (sizeof (*htab)); | |
2740 | if (htab == NULL) | |
2741 | return NULL; | |
2742 | ||
2743 | if (!_bfd_elf_link_hash_table_init (htab, abfd, | |
2744 | _bfd_elf_link_hash_newfunc, | |
2745 | sizeof (struct elf_link_hash_entry), | |
2746 | GENERIC_ELF_DATA)) | |
2747 | { | |
2748 | free (htab); | |
2749 | return NULL; | |
2750 | } | |
2751 | ||
2752 | htab->init_got_refcount.refcount = 0; | |
2753 | htab->init_got_refcount.glist = NULL; | |
2754 | htab->init_got_offset.offset = 0; | |
2755 | htab->init_got_offset.glist = NULL; | |
2756 | return (struct bfd_link_hash_table *) htab; | |
2757 | } | |
2758 | ||
2759 | /* Hook called by the linker routine which adds symbols from an object | |
2760 | file. */ | |
2761 | ||
2762 | static bfd_boolean | |
2763 | elf_arc_add_symbol_hook (bfd * abfd, | |
2764 | struct bfd_link_info * info, | |
2765 | Elf_Internal_Sym * sym, | |
2766 | const char ** namep ATTRIBUTE_UNUSED, | |
2767 | flagword * flagsp ATTRIBUTE_UNUSED, | |
2768 | asection ** secp ATTRIBUTE_UNUSED, | |
2769 | bfd_vma * valp ATTRIBUTE_UNUSED) | |
2770 | { | |
a43942db | 2771 | if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC |
34e967a5 MC |
2772 | && (abfd->flags & DYNAMIC) == 0 |
2773 | && bfd_get_flavour (info->output_bfd) == bfd_target_elf_flavour) | |
a43942db | 2774 | elf_tdata (info->output_bfd)->has_gnu_symbols |= elf_gnu_symbol_ifunc; |
34e967a5 MC |
2775 | |
2776 | return TRUE; | |
2777 | } | |
886a2506 | 2778 | |
6d00b590 | 2779 | #define TARGET_LITTLE_SYM arc_elf32_le_vec |
47b0e7ad | 2780 | #define TARGET_LITTLE_NAME "elf32-littlearc" |
886a2506 NC |
2781 | #define TARGET_BIG_SYM arc_elf32_be_vec |
2782 | #define TARGET_BIG_NAME "elf32-bigarc" | |
2783 | #define ELF_ARCH bfd_arch_arc | |
2784 | #define ELF_MACHINE_CODE EM_ARC_COMPACT | |
2785 | #define ELF_MACHINE_ALT1 EM_ARC_COMPACT2 | |
2786 | #define ELF_MAXPAGESIZE 0x2000 | |
2787 | ||
34e967a5 MC |
2788 | #define bfd_elf32_bfd_link_hash_table_create arc_elf_link_hash_table_create |
2789 | ||
2790 | #define bfd_elf32_bfd_merge_private_bfd_data arc_elf_merge_private_bfd_data | |
2791 | #define bfd_elf32_bfd_reloc_type_lookup arc_elf32_bfd_reloc_type_lookup | |
2792 | #define bfd_elf32_bfd_set_private_flags arc_elf_set_private_flags | |
2793 | #define bfd_elf32_bfd_print_private_bfd_data arc_elf_print_private_bfd_data | |
2794 | #define bfd_elf32_bfd_copy_private_bfd_data arc_elf_copy_private_bfd_data | |
2795 | ||
886a2506 NC |
2796 | #define elf_info_to_howto_rel arc_info_to_howto_rel |
2797 | #define elf_backend_object_p arc_elf_object_p | |
2798 | #define elf_backend_final_write_processing arc_elf_final_write_processing | |
2799 | ||
2800 | #define elf_backend_relocate_section elf_arc_relocate_section | |
2801 | #define elf_backend_check_relocs elf_arc_check_relocs | |
2802 | #define elf_backend_create_dynamic_sections _bfd_elf_create_dynamic_sections | |
2803 | ||
2804 | #define elf_backend_adjust_dynamic_symbol elf_arc_adjust_dynamic_symbol | |
2805 | #define elf_backend_finish_dynamic_symbol elf_arc_finish_dynamic_symbol | |
2806 | ||
2807 | #define elf_backend_finish_dynamic_sections elf_arc_finish_dynamic_sections | |
2808 | #define elf_backend_size_dynamic_sections elf_arc_size_dynamic_sections | |
34e967a5 | 2809 | #define elf_backend_add_symbol_hook elf_arc_add_symbol_hook |
886a2506 NC |
2810 | |
2811 | #define elf_backend_can_gc_sections 1 | |
2812 | #define elf_backend_want_got_plt 1 | |
2813 | #define elf_backend_plt_readonly 1 | |
34e967a5 | 2814 | #define elf_backend_rela_plts_and_copies_p 1 |
886a2506 NC |
2815 | #define elf_backend_want_plt_sym 0 |
2816 | #define elf_backend_got_header_size 12 | |
2817 | ||
2818 | #define elf_backend_may_use_rel_p 0 | |
2819 | #define elf_backend_may_use_rela_p 1 | |
2820 | #define elf_backend_default_use_rela_p 1 | |
252b5132 | 2821 | |
3c8adaca CZ |
2822 | #define elf_backend_default_execstack 0 |
2823 | ||
252b5132 | 2824 | #include "elf32-target.h" |