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" |
34e967a5 | 29 | #include "arc-plt.h" |
886a2506 | 30 | |
34e967a5 MC |
31 | #ifdef DEBUG |
32 | # define PR_DEBUG(fmt, args...) fprintf (stderr, fmt, ##args) | |
33 | #else | |
34 | # define PR_DEBUG(fmt, args...) | |
35 | #endif | |
36 | ||
37 | /* #define ARC_ENABLE_DEBUG 1 */ | |
38 | #ifndef ARC_ENABLE_DEBUG | |
886a2506 | 39 | #define ARC_DEBUG(...) |
34e967a5 MC |
40 | #else |
41 | static char * | |
42 | name_for_global_symbol (struct elf_link_hash_entry *h) | |
43 | { | |
44 | static char *local_str = "(local)"; | |
45 | if (h == NULL) | |
46 | return local_str; | |
47 | else | |
48 | return h->root.root.string; | |
49 | } | |
50 | #define ARC_DEBUG(args...) fprintf (stderr, ##args) | |
51 | #endif | |
52 | ||
53 | ||
54 | #define ADD_RELA(BFD, SECTION, OFFSET, SYM_IDX, TYPE, ADDEND) \ | |
55 | { \ | |
56 | struct elf_link_hash_table *_htab = elf_hash_table (info); \ | |
57 | Elf_Internal_Rela _rel; \ | |
23a42089 | 58 | bfd_byte * _loc; \ |
34e967a5 | 59 | \ |
23a42089 | 60 | _loc = _htab->srel##SECTION->contents \ |
34e967a5 MC |
61 | + ((_htab->srel##SECTION->reloc_count) \ |
62 | * sizeof (Elf32_External_Rela)); \ | |
63 | _htab->srel##SECTION->reloc_count++; \ | |
64 | _rel.r_addend = ADDEND; \ | |
65 | _rel.r_offset = (_htab->s##SECTION)->output_section->vma \ | |
66 | + (_htab->s##SECTION)->output_offset + OFFSET; \ | |
94e5c971 | 67 | BFD_ASSERT ((long) SYM_IDX != -1); \ |
34e967a5 | 68 | _rel.r_info = ELF32_R_INFO (SYM_IDX, TYPE); \ |
23a42089 | 69 | bfd_elf32_swap_reloca_out (BFD, &_rel, _loc); \ |
34e967a5 | 70 | } |
886a2506 NC |
71 | |
72 | struct arc_local_data | |
73 | { | |
74 | bfd_vma sdata_begin_symbol_vma; | |
75 | asection * sdata_output_section; | |
76 | bfd_vma got_symbol_vma; | |
77 | }; | |
78 | ||
79 | struct arc_local_data global_arc_data = | |
80 | { | |
81 | .sdata_begin_symbol_vma = 0, | |
82 | .sdata_output_section = NULL, | |
83 | .got_symbol_vma = 0, | |
84 | }; | |
85 | ||
86 | struct dynamic_sections | |
87 | { | |
88 | bfd_boolean initialized; | |
89 | asection * sgot; | |
90 | asection * srelgot; | |
91 | asection * sgotplt; | |
34e967a5 | 92 | asection * srelgotplt; |
886a2506 NC |
93 | asection * sdyn; |
94 | asection * splt; | |
95 | asection * srelplt; | |
96 | }; | |
97 | ||
886a2506 NC |
98 | enum dyn_section_types |
99 | { | |
100 | got = 0, | |
101 | relgot, | |
102 | gotplt, | |
103 | dyn, | |
104 | plt, | |
105 | relplt, | |
106 | DYN_SECTION_TYPES_END | |
107 | }; | |
108 | ||
109 | const char * dyn_section_names[DYN_SECTION_TYPES_END] = | |
110 | { | |
111 | ".got", | |
112 | ".rela.got", | |
113 | ".got.plt", | |
114 | ".dynamic", | |
115 | ".plt", | |
116 | ".rela.plt" | |
117 | }; | |
118 | ||
34e967a5 MC |
119 | enum tls_type_e |
120 | { | |
121 | GOT_UNKNOWN = 0, | |
122 | GOT_NORMAL, | |
123 | GOT_TLS_GD, | |
124 | GOT_TLS_IE, | |
125 | GOT_TLS_LE | |
126 | }; | |
127 | ||
128 | enum tls_got_entries | |
129 | { | |
130 | NONE = 0, | |
131 | MOD, | |
132 | OFF, | |
133 | MOD_AND_OFF | |
134 | }; | |
135 | ||
136 | struct got_entry | |
137 | { | |
138 | struct got_entry *next; | |
139 | enum tls_type_e type; | |
140 | bfd_vma offset; | |
141 | bfd_boolean processed; | |
142 | bfd_boolean created_dyn_relocation; | |
143 | enum tls_got_entries existing_entries; | |
144 | }; | |
145 | ||
146 | static void | |
147 | new_got_entry_to_list (struct got_entry **list, | |
148 | enum tls_type_e type, | |
149 | bfd_vma offset, | |
150 | enum tls_got_entries existing_entries) | |
151 | { | |
152 | /* Find list end. Avoid having multiple entries of the same | |
153 | type. */ | |
154 | struct got_entry **p = list; | |
155 | while (*p != NULL) | |
156 | { | |
157 | if ((*p)->type == type) | |
158 | return; | |
159 | p = &((*p)->next); | |
160 | } | |
161 | ||
162 | struct got_entry *entry = | |
163 | (struct got_entry *) malloc (sizeof(struct got_entry)); | |
164 | ||
165 | entry->type = type; | |
166 | entry->offset = offset; | |
167 | entry->next = NULL; | |
168 | entry->processed = FALSE; | |
169 | entry->created_dyn_relocation = FALSE; | |
170 | entry->existing_entries = existing_entries; | |
171 | ||
172 | /* Add the entry to the end of the list. */ | |
173 | *p = entry; | |
174 | } | |
175 | ||
176 | static bfd_boolean | |
177 | symbol_has_entry_of_type (struct got_entry *list, enum tls_type_e type) | |
178 | { | |
179 | while (list != NULL) | |
180 | { | |
181 | if (list->type == type) | |
182 | return TRUE; | |
183 | list = list->next; | |
184 | } | |
185 | ||
186 | return FALSE; | |
187 | } | |
188 | ||
886a2506 NC |
189 | /* The default symbols representing the init and fini dyn values. |
190 | TODO: Check what is the relation of those strings with arclinux.em | |
191 | and DT_INIT. */ | |
192 | #define INIT_SYM_STRING "_init" | |
193 | #define FINI_SYM_STRING "_fini" | |
194 | ||
195 | char * init_str = INIT_SYM_STRING; | |
196 | char * fini_str = FINI_SYM_STRING; | |
197 | ||
886a2506 NC |
198 | #define ARC_RELOC_HOWTO(TYPE, VALUE, SIZE, BITSIZE, RELOC_FUNCTION, OVERFLOW, FORMULA) \ |
199 | case VALUE: \ | |
b05a65d0 | 200 | return "R_" #TYPE; \ |
886a2506 NC |
201 | break; |
202 | ||
203 | static ATTRIBUTE_UNUSED const char * | |
204 | reloc_type_to_name (unsigned int type) | |
205 | { | |
206 | switch (type) | |
207 | { | |
208 | #include "elf/arc-reloc.def" | |
209 | ||
210 | default: | |
211 | return "UNKNOWN"; | |
212 | break; | |
213 | } | |
214 | } | |
215 | #undef ARC_RELOC_HOWTO | |
252b5132 | 216 | |
252b5132 RH |
217 | /* Try to minimize the amount of space occupied by relocation tables |
218 | on the ROM (not that the ROM won't be swamped by other ELF overhead). */ | |
0d2bcfaf | 219 | |
886a2506 NC |
220 | #define USE_REL 1 |
221 | ||
222 | static ATTRIBUTE_UNUSED bfd_boolean | |
223 | is_reloc_PC_relative (reloc_howto_type *howto) | |
224 | { | |
225 | return (strstr (howto->name, "PC") != NULL) ? TRUE : FALSE; | |
226 | } | |
227 | ||
228 | static bfd_boolean | |
229 | is_reloc_SDA_relative (reloc_howto_type *howto) | |
230 | { | |
231 | return (strstr (howto->name, "SDA") != NULL) ? TRUE : FALSE; | |
232 | } | |
233 | ||
234 | static bfd_boolean | |
235 | is_reloc_for_GOT (reloc_howto_type * howto) | |
236 | { | |
34e967a5 MC |
237 | if (strstr (howto->name, "TLS") != NULL) |
238 | return FALSE; | |
886a2506 NC |
239 | return (strstr (howto->name, "GOT") != NULL) ? TRUE : FALSE; |
240 | } | |
241 | ||
242 | static bfd_boolean | |
243 | is_reloc_for_PLT (reloc_howto_type * howto) | |
244 | { | |
245 | return (strstr (howto->name, "PLT") != NULL) ? TRUE : FALSE; | |
246 | } | |
247 | ||
34e967a5 MC |
248 | static bfd_boolean |
249 | is_reloc_for_TLS (reloc_howto_type *howto) | |
250 | { | |
251 | return (strstr (howto->name, "TLS") != NULL) ? TRUE : FALSE; | |
252 | } | |
253 | ||
886a2506 NC |
254 | #define arc_bfd_get_8(A,B,C) bfd_get_8(A,B) |
255 | #define arc_bfd_get_16(A,B,C) bfd_get_16(A,B) | |
72f3b6aa | 256 | #define arc_bfd_get_32(A,B,C) bfd_get_32(A,B) |
886a2506 NC |
257 | #define arc_bfd_put_8(A,B,C,D) bfd_put_8(A,B,C) |
258 | #define arc_bfd_put_16(A,B,C,D) bfd_put_16(A,B,C) | |
72f3b6aa | 259 | #define arc_bfd_put_32(A,B,C,D) bfd_put_32(A,B,C) |
886a2506 | 260 | |
252b5132 | 261 | |
47b0e7ad | 262 | static bfd_reloc_status_type |
886a2506 NC |
263 | arc_elf_reloc (bfd *abfd ATTRIBUTE_UNUSED, |
264 | arelent *reloc_entry, | |
265 | asymbol *symbol_in, | |
266 | void *data ATTRIBUTE_UNUSED, | |
267 | asection *input_section, | |
268 | bfd *output_bfd, | |
269 | char ** error_message ATTRIBUTE_UNUSED) | |
270 | { | |
271 | if (output_bfd != NULL) | |
272 | { | |
273 | reloc_entry->address += input_section->output_offset; | |
274 | ||
275 | /* In case of relocateable link and if the reloc is against a | |
276 | section symbol, the addend needs to be adjusted according to | |
277 | where the section symbol winds up in the output section. */ | |
278 | if ((symbol_in->flags & BSF_SECTION_SYM) && symbol_in->section) | |
279 | reloc_entry->addend += symbol_in->section->output_offset; | |
280 | ||
281 | return bfd_reloc_ok; | |
282 | } | |
283 | ||
284 | return bfd_reloc_continue; | |
285 | } | |
286 | ||
287 | ||
288 | #define ARC_RELOC_HOWTO(TYPE, VALUE, SIZE, BITSIZE, RELOC_FUNCTION, OVERFLOW, FORMULA) \ | |
289 | TYPE = VALUE, | |
290 | enum howto_list | |
291 | { | |
292 | #include "elf/arc-reloc.def" | |
293 | HOWTO_LIST_LAST | |
294 | }; | |
295 | #undef ARC_RELOC_HOWTO | |
296 | ||
297 | #define ARC_RELOC_HOWTO(TYPE, VALUE, RSIZE, BITSIZE, RELOC_FUNCTION, OVERFLOW, FORMULA) \ | |
b05a65d0 | 298 | [TYPE] = HOWTO (R_##TYPE, 0, RSIZE, BITSIZE, FALSE, 0, complain_overflow_##OVERFLOW, arc_elf_reloc, "R_" #TYPE, FALSE, 0, 0, FALSE), |
886a2506 NC |
299 | |
300 | static struct reloc_howto_struct elf_arc_howto_table[] = | |
301 | { | |
302 | #include "elf/arc-reloc.def" | |
34e967a5 MC |
303 | /* Example of what is generated by the preprocessor. Currently kept as an |
304 | example. | |
886a2506 NC |
305 | HOWTO (R_ARC_NONE, // Type. |
306 | 0, // Rightshift. | |
307 | 2, // Size (0 = byte, 1 = short, 2 = long). | |
308 | 32, // Bitsize. | |
309 | FALSE, // PC_relative. | |
310 | 0, // Bitpos. | |
311 | complain_overflow_bitfield, // Complain_on_overflow. | |
312 | bfd_elf_generic_reloc, // Special_function. | |
313 | "R_ARC_NONE", // Name. | |
314 | TRUE, // Partial_inplace. | |
315 | 0, // Src_mask. | |
316 | 0, // Dst_mask. | |
317 | FALSE), // PCrel_offset. | |
318 | */ | |
319 | }; | |
320 | #undef ARC_RELOC_HOWTO | |
321 | ||
322 | static void arc_elf_howto_init (void) | |
323 | { | |
324 | #define ARC_RELOC_HOWTO(TYPE, VALUE, SIZE, BITSIZE, RELOC_FUNCTION, OVERFLOW, FORMULA) \ | |
6f4b1afc | 325 | elf_arc_howto_table[TYPE].pc_relative = \ |
0a5ff21b | 326 | (strstr (#FORMULA, " P ") != NULL || strstr (#FORMULA, " PDATA ") != NULL); \ |
72f3b6aa CZ |
327 | elf_arc_howto_table[TYPE].dst_mask = RELOC_FUNCTION(0, ~0); \ |
328 | /* Only 32 bit data relocations should be marked as ME. */ \ | |
329 | if (strstr (#FORMULA, " ME ") != NULL) \ | |
330 | { \ | |
331 | BFD_ASSERT (SIZE == 2); \ | |
332 | } | |
886a2506 | 333 | |
34e967a5 | 334 | #include "elf/arc-reloc.def" |
72f3b6aa | 335 | |
47b0e7ad | 336 | } |
886a2506 | 337 | #undef ARC_RELOC_HOWTO |
47b0e7ad | 338 | |
886a2506 NC |
339 | |
340 | #define ARC_RELOC_HOWTO(TYPE, VALUE, SIZE, BITSIZE, RELOC_FUNCTION, OVERFLOW, FORMULA) \ | |
341 | [TYPE] = VALUE, | |
342 | const int howto_table_lookup[] = | |
343 | { | |
34e967a5 | 344 | #include "elf/arc-reloc.def" |
252b5132 | 345 | }; |
886a2506 NC |
346 | #undef ARC_RELOC_HOWTO |
347 | ||
f26dd308 AM |
348 | static reloc_howto_type * |
349 | arc_elf_howto (unsigned int r_type) | |
350 | { | |
351 | if (elf_arc_howto_table[R_ARC_32].dst_mask == 0) | |
352 | arc_elf_howto_init (); | |
353 | return &elf_arc_howto_table[r_type]; | |
354 | } | |
252b5132 RH |
355 | |
356 | /* Map BFD reloc types to ARC ELF reloc types. */ | |
357 | ||
358 | struct arc_reloc_map | |
359 | { | |
34e967a5 MC |
360 | bfd_reloc_code_real_type bfd_reloc_val; |
361 | unsigned char elf_reloc_val; | |
252b5132 RH |
362 | }; |
363 | ||
886a2506 NC |
364 | #define ARC_RELOC_HOWTO(TYPE, VALUE, SIZE, BITSIZE, RELOC_FUNCTION, OVERFLOW, FORMULA) \ |
365 | { BFD_RELOC_##TYPE, R_##TYPE }, | |
252b5132 RH |
366 | static const struct arc_reloc_map arc_reloc_map[] = |
367 | { | |
34e967a5 MC |
368 | #include "elf/arc-reloc.def" |
369 | ||
886a2506 NC |
370 | {BFD_RELOC_NONE, R_ARC_NONE}, |
371 | {BFD_RELOC_8, R_ARC_8}, | |
372 | {BFD_RELOC_16, R_ARC_16}, | |
373 | {BFD_RELOC_24, R_ARC_24}, | |
374 | {BFD_RELOC_32, R_ARC_32}, | |
252b5132 | 375 | }; |
886a2506 | 376 | #undef ARC_RELOC_HOWTO |
252b5132 RH |
377 | |
378 | static reloc_howto_type * | |
34e967a5 | 379 | arc_elf32_bfd_reloc_type_lookup (bfd * abfd ATTRIBUTE_UNUSED, |
47b0e7ad | 380 | bfd_reloc_code_real_type code) |
252b5132 RH |
381 | { |
382 | unsigned int i; | |
383 | ||
ea04a8f6 | 384 | for (i = ARRAY_SIZE (arc_reloc_map); i--;) |
886a2506 NC |
385 | { |
386 | if (arc_reloc_map[i].bfd_reloc_val == code) | |
f26dd308 | 387 | return arc_elf_howto (arc_reloc_map[i].elf_reloc_val); |
886a2506 | 388 | } |
ea04a8f6 | 389 | |
252b5132 RH |
390 | return NULL; |
391 | } | |
392 | ||
34e967a5 MC |
393 | /* Function to set the ELF flag bits. */ |
394 | static bfd_boolean | |
395 | arc_elf_set_private_flags (bfd *abfd, flagword flags) | |
396 | { | |
397 | elf_elfheader (abfd)->e_flags = flags; | |
398 | elf_flags_init (abfd) = TRUE; | |
399 | return TRUE; | |
400 | } | |
401 | ||
402 | /* Print private flags. */ | |
403 | static bfd_boolean | |
404 | arc_elf_print_private_bfd_data (bfd *abfd, void * ptr) | |
405 | { | |
406 | FILE *file = (FILE *) ptr; | |
407 | flagword flags; | |
408 | ||
409 | BFD_ASSERT (abfd != NULL && ptr != NULL); | |
410 | ||
411 | /* Print normal ELF private data. */ | |
412 | _bfd_elf_print_private_bfd_data (abfd, ptr); | |
413 | ||
414 | flags = elf_elfheader (abfd)->e_flags; | |
415 | fprintf (file, _("private flags = 0x%lx:"), (unsigned long) flags); | |
416 | ||
417 | switch (flags & EF_ARC_MACH_MSK) | |
418 | { | |
34e967a5 MC |
419 | case EF_ARC_CPU_ARCV2HS : fprintf (file, " -mcpu=ARCv2HS"); break; |
420 | case EF_ARC_CPU_ARCV2EM : fprintf (file, " -mcpu=ARCv2EM"); break; | |
421 | case E_ARC_MACH_ARC600 : fprintf (file, " -mcpu=ARC600"); break; | |
422 | case E_ARC_MACH_ARC601 : fprintf (file, " -mcpu=ARC601"); break; | |
423 | case E_ARC_MACH_ARC700 : fprintf (file, " -mcpu=ARC700"); break; | |
424 | default: | |
425 | fprintf (file, "-mcpu=unknown"); | |
426 | break; | |
427 | } | |
428 | ||
429 | switch (flags & EF_ARC_OSABI_MSK) | |
430 | { | |
431 | case E_ARC_OSABI_ORIG : fprintf (file, " (ABI:legacy)"); break; | |
432 | case E_ARC_OSABI_V2 : fprintf (file, " (ABI:v2)"); break; | |
433 | case E_ARC_OSABI_V3 : fprintf (file, " (ABI:v3)"); break; | |
434 | default: | |
435 | fprintf (file, "(ABI:unknown)"); | |
436 | break; | |
437 | } | |
438 | ||
439 | fputc ('\n', file); | |
440 | return TRUE; | |
441 | } | |
442 | ||
443 | /* Copy backend specific data from one object module to another. */ | |
444 | ||
445 | static bfd_boolean | |
446 | arc_elf_copy_private_bfd_data (bfd *ibfd, bfd *obfd) | |
447 | { | |
448 | if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour | |
449 | || bfd_get_flavour (obfd) != bfd_target_elf_flavour) | |
450 | return TRUE; | |
451 | ||
452 | BFD_ASSERT (!elf_flags_init (obfd) | |
453 | || elf_elfheader (obfd)->e_flags == elf_elfheader (ibfd)->e_flags); | |
454 | ||
455 | elf_elfheader (obfd)->e_flags = elf_elfheader (ibfd)->e_flags; | |
456 | elf_flags_init (obfd) = TRUE; | |
457 | ||
458 | /* Copy object attributes. */ | |
459 | _bfd_elf_copy_obj_attributes (ibfd, obfd); | |
460 | ||
461 | return _bfd_elf_copy_private_bfd_data (ibfd, obfd); | |
462 | } | |
463 | ||
157090f7 | 464 | static reloc_howto_type * |
34e967a5 MC |
465 | bfd_elf32_bfd_reloc_name_lookup (bfd * abfd ATTRIBUTE_UNUSED, |
466 | const char *r_name) | |
157090f7 AM |
467 | { |
468 | unsigned int i; | |
469 | ||
886a2506 | 470 | for (i = 0; i < ARRAY_SIZE (elf_arc_howto_table); i++) |
157090f7 AM |
471 | if (elf_arc_howto_table[i].name != NULL |
472 | && strcasecmp (elf_arc_howto_table[i].name, r_name) == 0) | |
f26dd308 | 473 | return arc_elf_howto (i); |
157090f7 AM |
474 | |
475 | return NULL; | |
476 | } | |
477 | ||
886a2506 | 478 | /* Set the howto pointer for an ARC ELF reloc. */ |
34e967a5 | 479 | |
252b5132 | 480 | static void |
886a2506 NC |
481 | arc_info_to_howto_rel (bfd * abfd ATTRIBUTE_UNUSED, |
482 | arelent * cache_ptr, | |
483 | Elf_Internal_Rela * dst) | |
252b5132 RH |
484 | { |
485 | unsigned int r_type; | |
486 | ||
487 | r_type = ELF32_R_TYPE (dst->r_info); | |
886a2506 | 488 | BFD_ASSERT (r_type < (unsigned int) R_ARC_max); |
f26dd308 | 489 | cache_ptr->howto = arc_elf_howto (r_type); |
252b5132 RH |
490 | } |
491 | ||
34e967a5 MC |
492 | /* Merge backend specific data from an object file to the output |
493 | object file when linking. */ | |
494 | ||
495 | static bfd_boolean | |
496 | arc_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd) | |
497 | { | |
498 | unsigned short mach_ibfd; | |
499 | static unsigned short mach_obfd = EM_NONE; | |
500 | flagword out_flags; | |
501 | flagword in_flags; | |
502 | asection *sec; | |
503 | ||
504 | /* Check if we have the same endianess. */ | |
505 | if (! _bfd_generic_verify_endian_match (ibfd, obfd)) | |
506 | { | |
507 | _bfd_error_handler (_("ERROR: Endian Match failed. Attempting to link " | |
508 | "%B with binary %s of opposite endian-ness"), | |
509 | ibfd, bfd_get_filename (obfd)); | |
510 | return FALSE; | |
511 | } | |
512 | ||
513 | /* Collect ELF flags. */ | |
514 | in_flags = elf_elfheader (ibfd)->e_flags & EF_ARC_MACH_MSK; | |
515 | out_flags = elf_elfheader (obfd)->e_flags & EF_ARC_MACH_MSK; | |
516 | ||
517 | if (!elf_flags_init (obfd)) /* First call, no flags set. */ | |
518 | { | |
519 | elf_flags_init (obfd) = TRUE; | |
520 | out_flags = in_flags; | |
521 | } | |
522 | ||
523 | if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour | |
524 | || bfd_get_flavour (obfd) != bfd_target_elf_flavour) | |
525 | return TRUE; | |
526 | ||
527 | /* Check to see if the input BFD actually contains any sections. Do | |
528 | not short-circuit dynamic objects; their section list may be | |
529 | emptied by elf_link_add_object_symbols. */ | |
530 | if (!(ibfd->flags & DYNAMIC)) | |
531 | { | |
532 | bfd_boolean null_input_bfd = TRUE; | |
533 | bfd_boolean only_data_sections = TRUE; | |
534 | ||
535 | for (sec = ibfd->sections; sec != NULL; sec = sec->next) | |
536 | { | |
537 | if ((bfd_get_section_flags (ibfd, sec) | |
538 | & (SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS)) | |
539 | == (SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS)) | |
540 | only_data_sections = FALSE; | |
541 | ||
542 | null_input_bfd = FALSE; | |
543 | } | |
544 | ||
545 | if (null_input_bfd || only_data_sections) | |
546 | return TRUE; | |
547 | } | |
548 | ||
549 | /* Complain about various flag/architecture mismatches. */ | |
550 | mach_ibfd = elf_elfheader (ibfd)->e_machine; | |
551 | if (mach_obfd == EM_NONE) | |
552 | { | |
553 | mach_obfd = mach_ibfd; | |
554 | } | |
555 | else | |
556 | { | |
557 | if (mach_ibfd != mach_obfd) | |
558 | { | |
559 | _bfd_error_handler (_("ERROR: Attempting to link %B " | |
560 | "with a binary %s of different architecture"), | |
561 | ibfd, bfd_get_filename (obfd)); | |
562 | return FALSE; | |
563 | } | |
564 | else if (in_flags != out_flags) | |
565 | { | |
566 | /* Warn if different flags. */ | |
567 | (*_bfd_error_handler) | |
568 | (_("%s: uses different e_flags (0x%lx) fields than " | |
569 | "previous modules (0x%lx)"), | |
570 | bfd_get_filename (ibfd), (long)in_flags, (long)out_flags); | |
571 | if (in_flags && out_flags) | |
572 | return FALSE; | |
573 | /* MWDT doesnt set the eflags hence make sure we choose the | |
574 | eflags set by gcc. */ | |
575 | in_flags = in_flags > out_flags ? in_flags : out_flags; | |
576 | } | |
577 | } | |
578 | ||
579 | /* Update the flags. */ | |
580 | elf_elfheader (obfd)->e_flags = in_flags; | |
581 | ||
582 | if (bfd_get_mach (obfd) < bfd_get_mach (ibfd)) | |
583 | { | |
584 | return bfd_set_arch_mach (obfd, bfd_arch_arc, bfd_get_mach (ibfd)); | |
585 | } | |
586 | ||
587 | return TRUE; | |
588 | } | |
589 | ||
252b5132 | 590 | /* Set the right machine number for an ARC ELF file. */ |
b34976b6 | 591 | static bfd_boolean |
886a2506 | 592 | arc_elf_object_p (bfd * abfd) |
252b5132 | 593 | { |
886a2506 NC |
594 | /* Make sure this is initialised, or you'll have the potential of passing |
595 | garbage---or misleading values---into the call to | |
596 | bfd_default_set_arch_mach (). */ | |
597 | int mach = bfd_mach_arc_arc700; | |
598 | unsigned long arch = elf_elfheader (abfd)->e_flags & EF_ARC_MACH_MSK; | |
599 | unsigned e_machine = elf_elfheader (abfd)->e_machine; | |
252b5132 | 600 | |
886a2506 | 601 | if (e_machine == EM_ARC_COMPACT || e_machine == EM_ARC_COMPACT2) |
252b5132 | 602 | { |
0d2bcfaf NC |
603 | switch (arch) |
604 | { | |
886a2506 NC |
605 | case E_ARC_MACH_ARC600: |
606 | mach = bfd_mach_arc_arc600; | |
607 | break; | |
608 | case E_ARC_MACH_ARC601: | |
609 | mach = bfd_mach_arc_arc601; | |
610 | break; | |
611 | case E_ARC_MACH_ARC700: | |
612 | mach = bfd_mach_arc_arc700; | |
613 | break; | |
8699fc3e AB |
614 | case E_ARC_MACH_NPS400: |
615 | mach = bfd_mach_arc_nps400; | |
616 | break; | |
886a2506 NC |
617 | case EF_ARC_CPU_ARCV2HS: |
618 | case EF_ARC_CPU_ARCV2EM: | |
619 | mach = bfd_mach_arc_arcv2; | |
620 | break; | |
621 | default: | |
622 | mach = (e_machine == EM_ARC_COMPACT) ? | |
623 | bfd_mach_arc_arc700 : bfd_mach_arc_arcv2; | |
624 | break; | |
625 | } | |
626 | } | |
627 | else | |
628 | { | |
629 | if (e_machine == EM_ARC) | |
630 | { | |
631 | (*_bfd_error_handler) | |
632 | (_("Error: The ARC4 architecture is no longer supported.\n")); | |
633 | return FALSE; | |
634 | } | |
635 | else | |
636 | { | |
637 | (*_bfd_error_handler) | |
638 | (_("Warning: unset or old architecture flags. \n" | |
639 | " Use default machine.\n")); | |
0d2bcfaf | 640 | } |
252b5132 | 641 | } |
886a2506 | 642 | |
0d2bcfaf | 643 | return bfd_default_set_arch_mach (abfd, bfd_arch_arc, mach); |
252b5132 RH |
644 | } |
645 | ||
646 | /* The final processing done just before writing out an ARC ELF object file. | |
647 | This gets the ARC architecture right based on the machine number. */ | |
648 | ||
649 | static void | |
34e967a5 MC |
650 | arc_elf_final_write_processing (bfd * abfd, |
651 | bfd_boolean linker ATTRIBUTE_UNUSED) | |
252b5132 | 652 | { |
886a2506 | 653 | unsigned long emf; |
252b5132 | 654 | |
0d2bcfaf | 655 | switch (bfd_get_mach (abfd)) |
252b5132 | 656 | { |
886a2506 | 657 | case bfd_mach_arc_arc600: |
886a2506 | 658 | emf = EM_ARC_COMPACT; |
0d2bcfaf | 659 | break; |
886a2506 | 660 | case bfd_mach_arc_arc601: |
886a2506 | 661 | emf = EM_ARC_COMPACT; |
0d2bcfaf | 662 | break; |
886a2506 | 663 | case bfd_mach_arc_arc700: |
886a2506 | 664 | emf = EM_ARC_COMPACT; |
0d2bcfaf | 665 | break; |
8699fc3e AB |
666 | case bfd_mach_arc_nps400: |
667 | emf = EM_ARC_COMPACT; | |
668 | break; | |
886a2506 | 669 | case bfd_mach_arc_arcv2: |
886a2506 | 670 | emf = EM_ARC_COMPACT2; |
0d2bcfaf | 671 | break; |
886a2506 NC |
672 | default: |
673 | abort (); | |
252b5132 | 674 | } |
34e967a5 | 675 | |
886a2506 | 676 | elf_elfheader (abfd)->e_machine = emf; |
7e458899 | 677 | |
886a2506 NC |
678 | /* Record whatever is the current syscall ABI version. */ |
679 | elf_elfheader (abfd)->e_flags |= E_ARC_OSABI_CURRENT; | |
252b5132 RH |
680 | } |
681 | ||
886a2506 NC |
682 | #define BFD_DEBUG_PIC(...) |
683 | ||
684 | struct arc_relocation_data | |
685 | { | |
686 | bfd_vma reloc_offset; | |
687 | bfd_vma reloc_addend; | |
688 | bfd_vma got_offset_value; | |
689 | ||
690 | bfd_vma sym_value; | |
691 | asection * sym_section; | |
692 | ||
693 | reloc_howto_type *howto; | |
694 | ||
695 | asection * input_section; | |
696 | ||
697 | bfd_vma sdata_begin_symbol_vma; | |
698 | bfd_boolean sdata_begin_symbol_vma_set; | |
699 | bfd_vma got_symbol_vma; | |
700 | ||
701 | bfd_boolean should_relocate; | |
702 | }; | |
703 | ||
704 | static void | |
705 | debug_arc_reloc (struct arc_relocation_data reloc_data) | |
706 | { | |
34e967a5 | 707 | PR_DEBUG ("Reloc type=%s, should_relocate = %s\n", |
886a2506 NC |
708 | reloc_data.howto->name, |
709 | reloc_data.should_relocate ? "true" : "false"); | |
34e967a5 | 710 | PR_DEBUG (" offset = 0x%x, addend = 0x%x\n", |
886a2506 NC |
711 | (unsigned int) reloc_data.reloc_offset, |
712 | (unsigned int) reloc_data.reloc_addend); | |
34e967a5 MC |
713 | PR_DEBUG (" Symbol:\n"); |
714 | PR_DEBUG (" value = 0x%08x\n", | |
886a2506 NC |
715 | (unsigned int) reloc_data.sym_value); |
716 | if (reloc_data.sym_section != NULL) | |
717 | { | |
34e967a5 MC |
718 | PR_DEBUG ("IN IF\n"); |
719 | PR_DEBUG ( | |
720 | " section name = %s, output_offset 0x%08x", | |
886a2506 | 721 | reloc_data.sym_section->name, |
34e967a5 MC |
722 | (unsigned int) reloc_data.sym_section->output_offset); |
723 | if (reloc_data.sym_section->output_section != NULL) | |
724 | { | |
725 | PR_DEBUG ( | |
726 | ", output_section->vma = 0x%08x", | |
727 | ((unsigned int) reloc_data.sym_section->output_section->vma)); | |
728 | } | |
729 | ||
730 | PR_DEBUG ( "\n"); | |
886a2506 NC |
731 | } |
732 | else | |
34e967a5 MC |
733 | { |
734 | PR_DEBUG ( " symbol section is NULL\n"); | |
735 | } | |
886a2506 | 736 | |
34e967a5 | 737 | PR_DEBUG ( " Input_section:\n"); |
886a2506 NC |
738 | if (reloc_data.input_section != NULL) |
739 | { | |
34e967a5 | 740 | PR_DEBUG ( |
886a2506 NC |
741 | " section name = %s, output_offset 0x%08x, output_section->vma = 0x%08x\n", |
742 | reloc_data.input_section->name, | |
743 | (unsigned int) reloc_data.input_section->output_offset, | |
744 | (unsigned int) reloc_data.input_section->output_section->vma); | |
34e967a5 | 745 | PR_DEBUG ( " changed_address = 0x%08x\n", |
886a2506 NC |
746 | (unsigned int) (reloc_data.input_section->output_section->vma + |
747 | reloc_data.input_section->output_offset + | |
748 | reloc_data.reloc_offset)); | |
749 | } | |
750 | else | |
34e967a5 MC |
751 | { |
752 | PR_DEBUG ( " input section is NULL\n"); | |
753 | } | |
886a2506 NC |
754 | } |
755 | ||
72f3b6aa CZ |
756 | static bfd_vma |
757 | middle_endian_convert (bfd_vma insn, bfd_boolean do_it) | |
6f4b1afc | 758 | { |
72f3b6aa CZ |
759 | if (do_it) |
760 | { | |
761 | insn = | |
762 | ((insn & 0xffff0000) >> 16) | | |
763 | ((insn & 0xffff) << 16); | |
764 | } | |
765 | return insn; | |
6f4b1afc CM |
766 | } |
767 | ||
72f3b6aa CZ |
768 | #define ME(reloc) (reloc) |
769 | ||
770 | #define IS_ME(FORMULA,BFD) ((strstr (FORMULA, "ME") != NULL) \ | |
771 | && (!bfd_big_endian (BFD))) | |
772 | ||
34e967a5 MC |
773 | #define S (reloc_data.sym_value \ |
774 | + (reloc_data.sym_section->output_section != NULL ? \ | |
775 | (reloc_data.sym_section->output_offset \ | |
776 | + reloc_data.sym_section->output_section->vma) : 0) \ | |
777 | ) | |
778 | #define L (reloc_data.sym_value \ | |
779 | + (reloc_data.sym_section->output_section != NULL ? \ | |
780 | (reloc_data.sym_section->output_offset \ | |
781 | + reloc_data.sym_section->output_section->vma) : 0) \ | |
782 | ) | |
886a2506 NC |
783 | #define A (reloc_data.reloc_addend) |
784 | #define B (0) | |
785 | #define G (reloc_data.got_offset_value) | |
34e967a5 MC |
786 | #define GOT (reloc_data.got_symbol_vma) |
787 | #define GOT_BEGIN (htab->sgot->output_section->vma) | |
788 | ||
886a2506 | 789 | #define MES (0) |
34e967a5 MC |
790 | /* P: relative offset to PCL The offset should be to the |
791 | current location aligned to 32 bits. */ | |
792 | #define P ( \ | |
793 | ( \ | |
794 | (reloc_data.input_section->output_section != NULL ? \ | |
795 | reloc_data.input_section->output_section->vma : 0) \ | |
796 | + reloc_data.input_section->output_offset \ | |
797 | + (reloc_data.reloc_offset - (bitsize >= 32 ? 4 : 0)) \ | |
886a2506 | 798 | ) & ~0x3) |
6f4b1afc CM |
799 | #define PDATA ( \ |
800 | (reloc_data.input_section->output_section->vma \ | |
801 | + reloc_data.input_section->output_offset \ | |
802 | + (reloc_data.reloc_offset) \ | |
34e967a5 | 803 | )) |
886a2506 NC |
804 | #define SECTSTAR (reloc_data.input_section->output_offset) |
805 | #define SECTSTART (reloc_data.input_section->output_offset) | |
806 | #define _SDA_BASE_ (reloc_data.sdata_begin_symbol_vma) | |
34e967a5 MC |
807 | #define TLS_REL ((elf_hash_table (info))->tls_sec->output_section->vma) |
808 | #define _SDA_BASE_ (reloc_data.sdata_begin_symbol_vma) | |
809 | #define TLS_TBSS (8) | |
810 | #define TCB_SIZE (8) | |
811 | ||
886a2506 NC |
812 | #define none (0) |
813 | ||
34e967a5 MC |
814 | #define PRINT_DEBUG_RELOC_INFO_BEFORE(FORMULA) \ |
815 | {\ | |
816 | asection *sym_section = reloc_data.sym_section; \ | |
817 | asection *input_section = reloc_data.input_section; \ | |
818 | ARC_DEBUG ("FORMULA = " #FORMULA "\n"); \ | |
819 | ARC_DEBUG ("S = 0x%x\n", S); \ | |
820 | ARC_DEBUG ("A = 0x%x\n", A); \ | |
821 | ARC_DEBUG ("L = 0x%x\n", L); \ | |
822 | if (sym_section->output_section != NULL) \ | |
823 | { \ | |
824 | ARC_DEBUG ("symbol_section->vma = 0x%x\n", \ | |
825 | sym_section->output_section->vma + sym_section->output_offset); \ | |
826 | } \ | |
827 | else \ | |
828 | { \ | |
829 | ARC_DEBUG ("symbol_section->vma = NULL\n"); \ | |
830 | } \ | |
831 | if (input_section->output_section != NULL) \ | |
832 | { \ | |
833 | ARC_DEBUG ("symbol_section->vma = 0x%x\n", \ | |
834 | input_section->output_section->vma + input_section->output_offset); \ | |
835 | } \ | |
836 | else \ | |
837 | { \ | |
838 | ARC_DEBUG ("symbol_section->vma = NULL\n"); \ | |
839 | } \ | |
840 | ARC_DEBUG ("PCL = 0x%x\n", P); \ | |
841 | ARC_DEBUG ("P = 0x%x\n", P); \ | |
842 | ARC_DEBUG ("G = 0x%x\n", G); \ | |
843 | ARC_DEBUG ("SDA_OFFSET = 0x%x\n", _SDA_BASE_); \ | |
844 | ARC_DEBUG ("SDA_SET = %d\n", reloc_data.sdata_begin_symbol_vma_set); \ | |
845 | ARC_DEBUG ("GOT_OFFSET = 0x%x\n", GOT); \ | |
846 | ARC_DEBUG ("relocation = 0x%08x\n", relocation); \ | |
847 | ARC_DEBUG ("before = 0x%08x\n", (unsigned int) insn); \ | |
848 | ARC_DEBUG ("data = 0x%08x (%u) (%d)\n", (unsigned int) relocation, (unsigned int) relocation, (int) relocation); \ | |
849 | } | |
850 | ||
851 | #define PRINT_DEBUG_RELOC_INFO_AFTER \ | |
852 | { \ | |
853 | ARC_DEBUG ("after = 0x%08x\n", (unsigned int) insn); \ | |
854 | } | |
855 | ||
886a2506 NC |
856 | #define ARC_RELOC_HOWTO(TYPE, VALUE, SIZE, BITSIZE, RELOC_FUNCTION, OVERFLOW, FORMULA) \ |
857 | case R_##TYPE: \ | |
858 | { \ | |
859 | bfd_vma bitsize ATTRIBUTE_UNUSED = BITSIZE; \ | |
860 | relocation = FORMULA ; \ | |
34e967a5 | 861 | PRINT_DEBUG_RELOC_INFO_BEFORE(FORMULA) \ |
72f3b6aa | 862 | insn = middle_endian_convert (insn, IS_ME (#FORMULA, abfd)); \ |
886a2506 | 863 | insn = RELOC_FUNCTION (insn, relocation); \ |
72f3b6aa | 864 | insn = middle_endian_convert (insn, IS_ME (#FORMULA, abfd)); \ |
34e967a5 | 865 | PRINT_DEBUG_RELOC_INFO_AFTER \ |
886a2506 NC |
866 | } \ |
867 | break; | |
868 | ||
869 | static bfd_reloc_status_type | |
34e967a5 MC |
870 | arc_do_relocation (bfd_byte * contents, |
871 | struct arc_relocation_data reloc_data, | |
872 | struct bfd_link_info *info) | |
886a2506 NC |
873 | { |
874 | bfd_vma relocation = 0; | |
875 | bfd_vma insn; | |
876 | bfd_vma orig_insn ATTRIBUTE_UNUSED; | |
72f3b6aa | 877 | bfd * abfd = reloc_data.input_section->owner; |
34e967a5 | 878 | struct elf_link_hash_table *htab ATTRIBUTE_UNUSED = elf_hash_table (info); |
886a2506 NC |
879 | |
880 | if (reloc_data.should_relocate == FALSE) | |
34e967a5 | 881 | return bfd_reloc_ok; |
886a2506 NC |
882 | |
883 | switch (reloc_data.howto->size) | |
884 | { | |
885 | case 2: | |
72f3b6aa | 886 | insn = arc_bfd_get_32 (abfd, |
886a2506 NC |
887 | contents + reloc_data.reloc_offset, |
888 | reloc_data.input_section); | |
889 | break; | |
890 | case 1: | |
72f3b6aa CZ |
891 | insn = arc_bfd_get_16 (abfd, |
892 | contents + reloc_data.reloc_offset, | |
893 | reloc_data.input_section); | |
894 | break; | |
886a2506 | 895 | case 0: |
72f3b6aa | 896 | insn = arc_bfd_get_8 (abfd, |
886a2506 NC |
897 | contents + reloc_data.reloc_offset, |
898 | reloc_data.input_section); | |
899 | break; | |
900 | default: | |
901 | insn = 0; | |
902 | BFD_ASSERT (0); | |
903 | break; | |
904 | } | |
905 | ||
906 | orig_insn = insn; | |
907 | ||
908 | switch (reloc_data.howto->type) | |
909 | { | |
34e967a5 | 910 | #include "elf/arc-reloc.def" |
886a2506 NC |
911 | |
912 | default: | |
913 | BFD_ASSERT (0); | |
914 | break; | |
915 | } | |
916 | ||
917 | /* Check for relocation overflow. */ | |
918 | if (reloc_data.howto->complain_on_overflow != complain_overflow_dont) | |
919 | { | |
920 | bfd_reloc_status_type flag; | |
921 | flag = bfd_check_overflow (reloc_data.howto->complain_on_overflow, | |
922 | reloc_data.howto->bitsize, | |
923 | reloc_data.howto->rightshift, | |
72f3b6aa | 924 | bfd_arch_bits_per_address (abfd), |
886a2506 NC |
925 | relocation); |
926 | ||
34e967a5 | 927 | #undef DEBUG_ARC_RELOC |
886a2506 NC |
928 | #define DEBUG_ARC_RELOC(A) debug_arc_reloc (A) |
929 | if (flag != bfd_reloc_ok) | |
930 | { | |
34e967a5 | 931 | PR_DEBUG ( "Relocation overflows !!!!\n"); |
886a2506 NC |
932 | |
933 | DEBUG_ARC_RELOC (reloc_data); | |
934 | ||
34e967a5 MC |
935 | PR_DEBUG ( |
936 | "Relocation value = signed -> %d, unsigned -> %u" | |
937 | ", hex -> (0x%08x)\n", | |
886a2506 NC |
938 | (int) relocation, |
939 | (unsigned int) relocation, | |
940 | (unsigned int) relocation); | |
941 | return flag; | |
942 | } | |
943 | } | |
34e967a5 | 944 | #undef DEBUG_ARC_RELOC |
886a2506 NC |
945 | #define DEBUG_ARC_RELOC(A) |
946 | ||
947 | switch (reloc_data.howto->size) | |
948 | { | |
949 | case 2: | |
72f3b6aa | 950 | arc_bfd_put_32 (abfd, insn, |
886a2506 NC |
951 | contents + reloc_data.reloc_offset, |
952 | reloc_data.input_section); | |
953 | break; | |
954 | case 1: | |
72f3b6aa CZ |
955 | arc_bfd_put_16 (abfd, insn, |
956 | contents + reloc_data.reloc_offset, | |
957 | reloc_data.input_section); | |
958 | break; | |
886a2506 | 959 | case 0: |
72f3b6aa | 960 | arc_bfd_put_8 (abfd, insn, |
886a2506 NC |
961 | contents + reloc_data.reloc_offset, |
962 | reloc_data.input_section); | |
963 | break; | |
964 | default: | |
965 | ARC_DEBUG ("size = %d\n", reloc_data.howto->size); | |
966 | BFD_ASSERT (0); | |
967 | break; | |
968 | } | |
969 | ||
970 | return bfd_reloc_ok; | |
971 | } | |
972 | #undef S | |
973 | #undef A | |
974 | #undef B | |
975 | #undef G | |
976 | #undef GOT | |
977 | #undef L | |
978 | #undef MES | |
979 | #undef P | |
980 | #undef SECTSTAR | |
981 | #undef SECTSTART | |
982 | #undef _SDA_BASE_ | |
983 | #undef none | |
984 | ||
985 | #undef ARC_RELOC_HOWTO | |
986 | ||
34e967a5 MC |
987 | static struct got_entry ** |
988 | arc_get_local_got_ents (bfd * abfd) | |
886a2506 | 989 | { |
34e967a5 | 990 | static struct got_entry **local_got_ents = NULL; |
886a2506 | 991 | |
34e967a5 | 992 | if (local_got_ents == NULL) |
886a2506 NC |
993 | { |
994 | size_t size; | |
886a2506 NC |
995 | Elf_Internal_Shdr *symtab_hdr = &((elf_tdata (abfd))->symtab_hdr); |
996 | ||
997 | size = symtab_hdr->sh_info * sizeof (bfd_vma); | |
34e967a5 MC |
998 | local_got_ents = (struct got_entry **) |
999 | bfd_alloc (abfd, sizeof(struct got_entry *) * size); | |
1000 | if (local_got_ents == NULL) | |
886a2506 | 1001 | return FALSE; |
34e967a5 MC |
1002 | |
1003 | memset (local_got_ents, 0, sizeof(struct got_entry *) * size); | |
1004 | elf_local_got_ents (abfd) = local_got_ents; | |
886a2506 NC |
1005 | } |
1006 | ||
34e967a5 | 1007 | return local_got_ents; |
886a2506 NC |
1008 | } |
1009 | ||
886a2506 NC |
1010 | /* Relocate an arc ELF section. |
1011 | Function : elf_arc_relocate_section | |
1012 | Brief : Relocate an arc section, by handling all the relocations | |
34e967a5 | 1013 | appearing in that section. |
886a2506 | 1014 | Args : output_bfd : The bfd being written to. |
34e967a5 MC |
1015 | info : Link information. |
1016 | input_bfd : The input bfd. | |
1017 | input_section : The section being relocated. | |
1018 | contents : contents of the section being relocated. | |
1019 | relocs : List of relocations in the section. | |
1020 | local_syms : is a pointer to the swapped in local symbols. | |
1021 | local_section : is an array giving the section in the input file | |
1022 | corresponding to the st_shndx field of each | |
1023 | local symbol. */ | |
886a2506 | 1024 | static bfd_boolean |
34e967a5 | 1025 | elf_arc_relocate_section (bfd * output_bfd, |
886a2506 | 1026 | struct bfd_link_info * info, |
34e967a5 MC |
1027 | bfd * input_bfd, |
1028 | asection * input_section, | |
1029 | bfd_byte * contents, | |
886a2506 NC |
1030 | Elf_Internal_Rela * relocs, |
1031 | Elf_Internal_Sym * local_syms, | |
34e967a5 | 1032 | asection ** local_sections) |
886a2506 | 1033 | { |
34e967a5 | 1034 | Elf_Internal_Shdr * symtab_hdr; |
886a2506 | 1035 | struct elf_link_hash_entry ** sym_hashes; |
34e967a5 MC |
1036 | struct got_entry ** local_got_ents; |
1037 | Elf_Internal_Rela * rel; | |
1038 | Elf_Internal_Rela * relend; | |
1039 | struct elf_link_hash_table *htab = elf_hash_table (info); | |
886a2506 NC |
1040 | |
1041 | symtab_hdr = &((elf_tdata (input_bfd))->symtab_hdr); | |
1042 | sym_hashes = elf_sym_hashes (input_bfd); | |
1043 | ||
1044 | rel = relocs; | |
1045 | relend = relocs + input_section->reloc_count; | |
1046 | for (; rel < relend; rel++) | |
1047 | { | |
1048 | enum elf_arc_reloc_type r_type; | |
34e967a5 MC |
1049 | reloc_howto_type * howto; |
1050 | unsigned long r_symndx; | |
886a2506 | 1051 | struct elf_link_hash_entry * h; |
34e967a5 MC |
1052 | Elf_Internal_Sym * sym; |
1053 | asection * sec; | |
1054 | struct elf_link_hash_entry *h2; | |
886a2506 NC |
1055 | |
1056 | struct arc_relocation_data reloc_data = | |
1057 | { | |
34e967a5 MC |
1058 | .reloc_offset = 0, |
1059 | .reloc_addend = 0, | |
1060 | .got_offset_value = 0, | |
1061 | .sym_value = 0, | |
1062 | .sym_section = NULL, | |
1063 | .howto = NULL, | |
1064 | .input_section = NULL, | |
1065 | .sdata_begin_symbol_vma = 0, | |
1066 | .sdata_begin_symbol_vma_set = FALSE, | |
1067 | .got_symbol_vma = 0, | |
1068 | .should_relocate = FALSE | |
886a2506 NC |
1069 | }; |
1070 | ||
34e967a5 MC |
1071 | r_type = ELF32_R_TYPE (rel->r_info); |
1072 | ||
1073 | if (r_type >= (int) R_ARC_max) | |
1074 | { | |
1075 | bfd_set_error (bfd_error_bad_value); | |
1076 | return FALSE; | |
1077 | } | |
1078 | howto = &elf_arc_howto_table[r_type]; | |
1079 | ||
1080 | r_symndx = ELF32_R_SYM (rel->r_info); | |
1081 | ||
1082 | /* If we are generating another .o file and the symbol in not | |
1083 | local, skip this relocation. */ | |
1084 | if (bfd_link_relocatable (info)) | |
1085 | { | |
1086 | /* This is a relocateable link. We don't have to change | |
1087 | anything, unless the reloc is against a section symbol, | |
1088 | in which case we have to adjust according to where the | |
1089 | section symbol winds up in the output section. */ | |
1090 | ||
1091 | /* Checks if this is a local symbol and thus the reloc | |
1092 | might (will??) be against a section symbol. */ | |
1093 | if (r_symndx < symtab_hdr->sh_info) | |
1094 | { | |
1095 | sym = local_syms + r_symndx; | |
1096 | if (ELF_ST_TYPE (sym->st_info) == STT_SECTION) | |
1097 | { | |
1098 | sec = local_sections[r_symndx]; | |
1099 | ||
1100 | /* for RELA relocs.Just adjust the addend | |
1101 | value in the relocation entry. */ | |
1102 | rel->r_addend += sec->output_offset + sym->st_value; | |
1103 | ||
1104 | BFD_DEBUG_PIC ( | |
1105 | PR_DEBUG ("local symbols reloc " | |
1106 | "(section=%d %s) seen in %s\n", | |
1107 | r_symndx, | |
1108 | local_sections[r_symndx]->name, | |
1109 | __PRETTY_FUNCTION__) | |
1110 | ); | |
1111 | } | |
1112 | } | |
1113 | ||
1114 | continue; | |
1115 | } | |
886a2506 NC |
1116 | |
1117 | h2 = elf_link_hash_lookup (elf_hash_table (info), "__SDATA_BEGIN__", | |
1118 | FALSE, FALSE, TRUE); | |
1119 | ||
1120 | if (reloc_data.sdata_begin_symbol_vma_set == FALSE | |
34e967a5 MC |
1121 | && h2 != NULL && h2->root.type != bfd_link_hash_undefined |
1122 | && h2->root.u.def.section->output_section != NULL) | |
1123 | /* TODO: Verify this condition. */ | |
886a2506 NC |
1124 | { |
1125 | reloc_data.sdata_begin_symbol_vma = | |
1126 | (h2->root.u.def.value + | |
1127 | h2->root.u.def.section->output_section->vma); | |
1128 | reloc_data.sdata_begin_symbol_vma_set = TRUE; | |
1129 | } | |
1130 | ||
886a2506 NC |
1131 | reloc_data.input_section = input_section; |
1132 | reloc_data.howto = howto; | |
1133 | reloc_data.reloc_offset = rel->r_offset; | |
1134 | reloc_data.reloc_addend = rel->r_addend; | |
1135 | ||
886a2506 NC |
1136 | /* This is a final link. */ |
1137 | h = NULL; | |
1138 | sym = NULL; | |
1139 | sec = NULL; | |
1140 | ||
1141 | if (r_symndx < symtab_hdr->sh_info) /* A local symbol. */ | |
1142 | { | |
34e967a5 MC |
1143 | local_got_ents = arc_get_local_got_ents (output_bfd); |
1144 | struct got_entry *entry = local_got_ents[r_symndx]; | |
1145 | ||
886a2506 NC |
1146 | sym = local_syms + r_symndx; |
1147 | sec = local_sections[r_symndx]; | |
1148 | ||
1149 | reloc_data.sym_value = sym->st_value; | |
1150 | reloc_data.sym_section = sec; | |
1151 | ||
841fdfcd CZ |
1152 | /* Mergeable section handling. */ |
1153 | if ((sec->flags & SEC_MERGE) | |
1154 | && ELF_ST_TYPE (sym->st_info) == STT_SECTION) | |
1155 | { | |
1156 | asection *msec; | |
1157 | msec = sec; | |
1158 | rel->r_addend = _bfd_elf_rel_local_sym (output_bfd, sym, | |
1159 | &msec, rel->r_addend); | |
1160 | rel->r_addend -= (sec->output_section->vma | |
1161 | + sec->output_offset | |
1162 | + sym->st_value); | |
1163 | rel->r_addend += msec->output_section->vma + msec->output_offset; | |
1164 | ||
1165 | reloc_data.reloc_addend = rel->r_addend; | |
1166 | } | |
1167 | ||
34e967a5 MC |
1168 | if ((is_reloc_for_GOT (howto) |
1169 | || is_reloc_for_TLS (howto)) && entry != NULL) | |
1170 | { | |
1171 | if (is_reloc_for_TLS (howto)) | |
1172 | while (entry->type == GOT_NORMAL && entry->next != NULL) | |
1173 | entry = entry->next; | |
1174 | ||
1175 | if (is_reloc_for_GOT (howto)) | |
1176 | while (entry->type != GOT_NORMAL && entry->next != NULL) | |
1177 | entry = entry->next; | |
1178 | ||
1179 | if (entry->type == GOT_TLS_GD && entry->processed == FALSE) | |
1180 | { | |
1181 | bfd_vma sym_vma = sym->st_value | |
1182 | + sec->output_section->vma | |
1183 | + sec->output_offset; | |
1184 | ||
1185 | /* Create dynamic relocation for local sym. */ | |
1186 | ADD_RELA (output_bfd, got, entry->offset, 0, | |
1187 | R_ARC_TLS_DTPMOD, 0); | |
1188 | ADD_RELA (output_bfd, got, entry->offset+4, 0, | |
1189 | R_ARC_TLS_DTPOFF, 0); | |
1190 | ||
1191 | bfd_vma sec_vma = sec->output_section->vma | |
1192 | + sec->output_offset; | |
1193 | bfd_put_32 (output_bfd, sym_vma - sec_vma, | |
1194 | htab->sgot->contents + entry->offset + 4); | |
1195 | ||
1196 | ARC_DEBUG ("arc_info: FIXED -> GOT_TLS_GD value " | |
1197 | "= 0x%x @ 0x%x, for symbol %s\n", | |
1198 | sym_vma - sec_vma, | |
1199 | htab->sgot->contents + entry->offset + 4, | |
1200 | "(local)"); | |
1201 | ||
1202 | entry->processed = TRUE; | |
1203 | } | |
1204 | if (entry->type == GOT_TLS_IE && entry->processed == FALSE) | |
1205 | { | |
1206 | bfd_vma sym_vma = sym->st_value | |
1207 | + sec->output_section->vma | |
1208 | + sec->output_offset; | |
1209 | bfd_vma sec_vma = htab->tls_sec->output_section->vma; | |
1210 | bfd_put_32 (output_bfd, sym_vma - sec_vma, | |
1211 | htab->sgot->contents + entry->offset); | |
1212 | /* TODO: Check if this type of relocs is the cause | |
1213 | for all the ARC_NONE dynamic relocs. */ | |
1214 | ||
1215 | ARC_DEBUG ("arc_info: FIXED -> GOT_TLS_IE value = " | |
1216 | "0x%x @ 0x%x, for symbol %s\n", | |
1217 | sym_vma - sec_vma, | |
1218 | htab->sgot->contents + entry->offset, | |
1219 | "(local)"); | |
1220 | ||
1221 | entry->processed = TRUE; | |
1222 | } | |
1223 | if (entry->type == GOT_NORMAL && entry->processed == FALSE) | |
1224 | { | |
1225 | bfd_vma sec_vma = reloc_data.sym_section->output_section->vma | |
1226 | + reloc_data.sym_section->output_offset; | |
1227 | ||
1228 | bfd_put_32 (output_bfd, reloc_data.sym_value + sec_vma, | |
1229 | htab->sgot->contents + entry->offset); | |
1230 | ||
1231 | ARC_DEBUG ("arc_info: PATCHED: 0x%08x @ 0x%08x for " | |
1232 | "sym %s in got offset 0x%x\n", | |
1233 | reloc_data.sym_value + sec_vma, | |
1234 | htab->sgot->output_section->vma | |
1235 | + htab->sgot->output_offset + entry->offset, | |
1236 | "(local)", | |
1237 | entry->offset); | |
1238 | entry->processed = TRUE; | |
1239 | } | |
1240 | ||
1241 | reloc_data.got_offset_value = entry->offset; | |
1242 | ARC_DEBUG ("arc_info: GOT_ENTRY = %d, offset = 0x%x, " | |
1243 | "vma = 0x%x for symbol %s\n", | |
1244 | entry->type, entry->offset, | |
1245 | htab->sgot->output_section->vma | |
1246 | + htab->sgot->output_offset + entry->offset, | |
1247 | "(local)"); | |
1248 | } | |
1249 | ||
1250 | BFD_ASSERT (htab->sgot != NULL || !is_reloc_for_GOT (howto)); | |
1251 | if (htab->sgot != NULL) | |
1252 | reloc_data.got_symbol_vma = htab->sgot->output_section->vma | |
1253 | + htab->sgot->output_offset; | |
886a2506 NC |
1254 | |
1255 | reloc_data.should_relocate = TRUE; | |
1256 | } | |
1257 | else /* Global symbol. */ | |
1258 | { | |
1259 | /* Get the symbol's entry in the symtab. */ | |
1260 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
1261 | ||
1262 | while (h->root.type == bfd_link_hash_indirect | |
1263 | || h->root.type == bfd_link_hash_warning) | |
1264 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
1265 | ||
1266 | BFD_ASSERT ((h->dynindx == -1) >= (h->forced_local != 0)); | |
1267 | /* If we have encountered a definition for this symbol. */ | |
1268 | if (h->root.type == bfd_link_hash_defined | |
1269 | || h->root.type == bfd_link_hash_defweak) | |
1270 | { | |
1271 | reloc_data.sym_value = h->root.u.def.value; | |
1272 | reloc_data.sym_section = h->root.u.def.section; | |
1273 | ||
1274 | reloc_data.should_relocate = TRUE; | |
1275 | ||
34e967a5 | 1276 | if (is_reloc_for_GOT (howto) && !bfd_link_pic (info)) |
886a2506 | 1277 | { |
34e967a5 MC |
1278 | /* TODO: Change it to use arc_do_relocation with |
1279 | ARC_32 reloc. Try to use ADD_RELA macro. */ | |
886a2506 NC |
1280 | bfd_vma relocation = |
1281 | reloc_data.sym_value + reloc_data.reloc_addend | |
34e967a5 MC |
1282 | + (reloc_data.sym_section->output_section != NULL ? |
1283 | (reloc_data.sym_section->output_offset | |
1284 | + reloc_data.sym_section->output_section->vma) | |
1285 | : 0); | |
1286 | ||
1287 | BFD_ASSERT (h->got.glist); | |
1288 | bfd_vma got_offset = h->got.glist->offset; | |
1289 | bfd_put_32 (output_bfd, relocation, | |
1290 | htab->sgot->contents + got_offset); | |
1291 | } | |
1292 | if (is_reloc_for_PLT (howto) && h->plt.offset != (bfd_vma) -1) | |
1293 | { | |
1294 | /* TODO: This is repeated up here. */ | |
1295 | reloc_data.sym_value = h->plt.offset; | |
1296 | reloc_data.sym_section = htab->splt; | |
886a2506 NC |
1297 | } |
1298 | } | |
1299 | else if (h->root.type == bfd_link_hash_undefweak) | |
1300 | { | |
1301 | /* Is weak symbol and has no definition. */ | |
34e967a5 MC |
1302 | if (is_reloc_for_GOT (howto)) |
1303 | { | |
1304 | reloc_data.sym_value = h->root.u.def.value; | |
1305 | reloc_data.sym_section = htab->sgot; | |
1306 | reloc_data.should_relocate = TRUE; | |
1307 | } | |
1308 | else if (is_reloc_for_PLT (howto) | |
1309 | && h->plt.offset != (bfd_vma) -1) | |
1310 | { | |
1311 | /* TODO: This is repeated up here. */ | |
1312 | reloc_data.sym_value = h->plt.offset; | |
1313 | reloc_data.sym_section = htab->splt; | |
1314 | reloc_data.should_relocate = TRUE; | |
1315 | } | |
1316 | else | |
1317 | continue; | |
886a2506 NC |
1318 | } |
1319 | else | |
1320 | { | |
1321 | if (is_reloc_for_GOT (howto)) | |
1322 | { | |
886a2506 | 1323 | reloc_data.sym_value = h->root.u.def.value; |
34e967a5 | 1324 | reloc_data.sym_section = htab->sgot; |
886a2506 NC |
1325 | |
1326 | reloc_data.should_relocate = TRUE; | |
1327 | } | |
1328 | else if (is_reloc_for_PLT (howto)) | |
1329 | { | |
7e458899 CZ |
1330 | /* Fail if it is linking for PIE and the symbol is |
1331 | undefined. */ | |
1332 | if (bfd_link_executable (info) | |
1333 | && !(*info->callbacks->undefined_symbol) | |
1334 | (info, h->root.root.string, input_bfd, input_section, | |
1335 | rel->r_offset, TRUE)) | |
1336 | { | |
1337 | return FALSE; | |
1338 | } | |
886a2506 | 1339 | reloc_data.sym_value = h->plt.offset; |
34e967a5 | 1340 | reloc_data.sym_section = htab->splt; |
886a2506 NC |
1341 | |
1342 | reloc_data.should_relocate = TRUE; | |
1343 | } | |
7e458899 CZ |
1344 | else if (!bfd_link_pic (info) |
1345 | && !(*info->callbacks->undefined_symbol) | |
886a2506 | 1346 | (info, h->root.root.string, input_bfd, input_section, |
7e458899 | 1347 | rel->r_offset, TRUE)) |
886a2506 NC |
1348 | { |
1349 | return FALSE; | |
1350 | } | |
1351 | } | |
1352 | ||
34e967a5 MC |
1353 | if (h->got.glist != NULL) |
1354 | { | |
1355 | struct got_entry *entry = h->got.glist; | |
1356 | ||
1357 | if (is_reloc_for_GOT (howto) || is_reloc_for_TLS (howto)) | |
1358 | { | |
1359 | if (! elf_hash_table (info)->dynamic_sections_created | |
1360 | || (bfd_link_pic (info) | |
1361 | && SYMBOL_REFERENCES_LOCAL (info, h))) | |
1362 | { | |
1363 | reloc_data.sym_value = h->root.u.def.value; | |
1364 | reloc_data.sym_section = h->root.u.def.section; | |
1365 | ||
1366 | if (is_reloc_for_TLS (howto)) | |
1367 | while (entry->type == GOT_NORMAL && entry->next != NULL) | |
1368 | entry = entry->next; | |
1369 | ||
1370 | if (entry->processed == FALSE | |
1371 | && (entry->type == GOT_TLS_GD | |
1372 | || entry->type == GOT_TLS_IE)) | |
1373 | { | |
1374 | bfd_vma sym_value = h->root.u.def.value | |
1375 | + h->root.u.def.section->output_section->vma | |
1376 | + h->root.u.def.section->output_offset; | |
1377 | ||
1378 | bfd_vma sec_vma = | |
1379 | elf_hash_table (info)->tls_sec->output_section->vma; | |
1380 | ||
1381 | bfd_put_32 (output_bfd, | |
1382 | sym_value - sec_vma, | |
1383 | htab->sgot->contents + entry->offset | |
1384 | + (entry->existing_entries == MOD_AND_OFF ? 4 : 0)); | |
1385 | ||
1386 | ARC_DEBUG ("arc_info: FIXED -> %s value = 0x%x " | |
1387 | "@ 0x%x, for symbol %s\n", | |
1388 | (entry->type == GOT_TLS_GD ? "GOT_TLS_GD" : | |
1389 | "GOT_TLS_IE"), | |
1390 | sym_value - sec_vma, | |
1391 | htab->sgot->contents + entry->offset | |
1392 | + (entry->existing_entries == MOD_AND_OFF ? 4 : 0), | |
1393 | h->root.root.string); | |
1394 | ||
1395 | entry->processed = TRUE; | |
1396 | } | |
1397 | ||
1398 | if (entry->type == GOT_TLS_IE && entry->processed == FALSE) | |
1399 | { | |
1400 | bfd_vma sec_vma = htab->tls_sec->output_section->vma; | |
1401 | bfd_put_32 (output_bfd, | |
1402 | reloc_data.sym_value - sec_vma, | |
1403 | htab->sgot->contents + entry->offset); | |
1404 | } | |
1405 | ||
1406 | if (entry->type == GOT_NORMAL && entry->processed == FALSE) | |
1407 | { | |
1408 | bfd_vma sec_vma = | |
1409 | reloc_data.sym_section->output_section->vma | |
1410 | + reloc_data.sym_section->output_offset; | |
1411 | ||
1412 | if (h->root.type != bfd_link_hash_undefweak) | |
1413 | { | |
1414 | bfd_put_32 (output_bfd, | |
1415 | reloc_data.sym_value + sec_vma, | |
1416 | htab->sgot->contents + entry->offset); | |
1417 | ||
1418 | ARC_DEBUG ("arc_info: PATCHED: 0x%08x " | |
1419 | "@ 0x%08x for sym %s in got offset 0x%x\n", | |
1420 | reloc_data.sym_value + sec_vma, | |
1421 | htab->sgot->output_section->vma | |
1422 | + htab->sgot->output_offset + entry->offset, | |
1423 | h->root.root.string, | |
1424 | entry->offset); | |
1425 | } | |
1426 | else | |
1427 | { | |
1428 | ARC_DEBUG ("arc_info: PATCHED: NOT_PATCHED " | |
1429 | "@ 0x%08x for sym %s in got offset 0x%x " | |
1430 | "(is undefweak)\n", | |
1431 | htab->sgot->output_section->vma | |
1432 | + htab->sgot->output_offset + entry->offset, | |
1433 | h->root.root.string, | |
1434 | entry->offset); | |
1435 | } | |
1436 | ||
1437 | entry->processed = TRUE; | |
1438 | } | |
1439 | } | |
1440 | } | |
1441 | ||
1442 | reloc_data.got_offset_value = entry->offset; | |
1443 | ||
1444 | ARC_DEBUG ("arc_info: GOT_ENTRY = %d, offset = 0x%x, " | |
1445 | "vma = 0x%x for symbol %s\n", | |
1446 | entry->type, entry->offset, | |
1447 | htab->sgot->output_section->vma | |
1448 | + htab->sgot->output_offset + entry->offset, | |
1449 | h->root.root.string); | |
1450 | } | |
1451 | ||
1452 | BFD_ASSERT (htab->sgot != NULL || !is_reloc_for_GOT (howto)); | |
1453 | if (htab->sgot != NULL) | |
1454 | reloc_data.got_symbol_vma = htab->sgot->output_section->vma | |
1455 | + htab->sgot->output_offset; | |
886a2506 NC |
1456 | } |
1457 | ||
34e967a5 MC |
1458 | switch (r_type) |
1459 | { | |
1460 | case R_ARC_32: | |
1461 | case R_ARC_32_ME: | |
1462 | case R_ARC_PC32: | |
1463 | case R_ARC_32_PCREL: | |
7e458899 | 1464 | if (bfd_link_pic (info) && !bfd_link_pie (info) |
34e967a5 MC |
1465 | && ((r_type != R_ARC_PC32 && r_type != R_ARC_32_PCREL) |
1466 | || (h != NULL | |
1467 | && h->dynindx != -1 | |
1468 | && (!info->symbolic || !h->def_regular)))) | |
1469 | { | |
1470 | Elf_Internal_Rela outrel; | |
1471 | bfd_byte *loc; | |
1472 | bfd_boolean skip = FALSE; | |
1473 | bfd_boolean relocate = FALSE; | |
1474 | asection *sreloc = _bfd_elf_get_dynamic_reloc_section | |
1475 | (input_bfd, input_section, | |
1476 | /*RELA*/ TRUE); | |
1477 | ||
1478 | BFD_ASSERT (sreloc != NULL); | |
1479 | ||
1480 | outrel.r_offset = _bfd_elf_section_offset (output_bfd, | |
1481 | info, | |
1482 | input_section, | |
1483 | rel->r_offset); | |
1484 | if (outrel.r_offset == (bfd_vma) -1) | |
1485 | skip = TRUE; | |
1486 | ||
1487 | outrel.r_addend = rel->r_addend; | |
1488 | outrel.r_offset += (input_section->output_section->vma | |
1489 | + input_section->output_offset); | |
1490 | ||
1491 | if (skip) | |
1492 | { | |
1493 | memset (&outrel, 0, sizeof outrel); | |
1494 | relocate = FALSE; | |
1495 | } | |
1496 | else if (r_type == R_ARC_PC32 | |
1497 | || r_type == R_ARC_32_PCREL) | |
1498 | { | |
94e5c971 | 1499 | BFD_ASSERT (h != NULL); |
34e967a5 MC |
1500 | if ((input_section->flags & SEC_ALLOC) != 0) |
1501 | relocate = FALSE; | |
1502 | else | |
1503 | relocate = TRUE; | |
94e5c971 CZ |
1504 | |
1505 | BFD_ASSERT (h->dynindx != -1); | |
34e967a5 MC |
1506 | outrel.r_info = ELF32_R_INFO (h->dynindx, r_type); |
1507 | } | |
1508 | else | |
1509 | { | |
1510 | /* Handle local symbols, they either do not have a | |
1511 | global hash table entry (h == NULL), or are | |
1512 | forced local due to a version script | |
1513 | (h->forced_local), or the third condition is | |
1514 | legacy, it appears to say something like, for | |
1515 | links where we are pre-binding the symbols, or | |
1516 | there's not an entry for this symbol in the | |
1517 | dynamic symbol table, and it's a regular symbol | |
1518 | not defined in a shared object, then treat the | |
1519 | symbol as local, resolve it now. */ | |
1520 | if (h == NULL | |
1521 | || ((info->symbolic || h->dynindx == -1) | |
1522 | && h->def_regular) | |
1523 | || h->forced_local) | |
1524 | { | |
1525 | relocate = TRUE; | |
1526 | /* outrel.r_addend = 0; */ | |
1527 | outrel.r_info = ELF32_R_INFO (0, R_ARC_RELATIVE); | |
1528 | } | |
1529 | else | |
1530 | { | |
1531 | BFD_ASSERT (h->dynindx != -1); | |
7e458899 CZ |
1532 | |
1533 | /* This type of dynamic relocation cannot be created | |
1534 | for code sections. */ | |
1535 | BFD_ASSERT ((input_section->flags & SEC_CODE) == 0); | |
1536 | ||
34e967a5 MC |
1537 | if ((input_section->flags & SEC_ALLOC) != 0) |
1538 | relocate = FALSE; | |
1539 | else | |
1540 | relocate = TRUE; | |
94e5c971 CZ |
1541 | |
1542 | BFD_ASSERT (h->dynindx != -1); | |
34e967a5 MC |
1543 | outrel.r_info = ELF32_R_INFO (h->dynindx, R_ARC_32); |
1544 | } | |
1545 | } | |
1546 | ||
1547 | BFD_ASSERT (sreloc->contents != 0); | |
1548 | ||
1549 | loc = sreloc->contents; | |
1550 | loc += sreloc->reloc_count * sizeof (Elf32_External_Rela); | |
1551 | sreloc->reloc_count += 1; | |
1552 | ||
1553 | bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); | |
1554 | ||
1555 | if (relocate == FALSE) | |
1556 | continue; | |
1557 | } | |
1558 | break; | |
1559 | default: | |
1560 | break; | |
1561 | } | |
1562 | ||
1563 | if (is_reloc_SDA_relative (howto) | |
1564 | && (reloc_data.sdata_begin_symbol_vma_set == FALSE)) | |
886a2506 NC |
1565 | { |
1566 | (*_bfd_error_handler) | |
1567 | ("Error: Linker symbol __SDATA_BEGIN__ not found"); | |
1568 | bfd_set_error (bfd_error_bad_value); | |
1569 | return FALSE; | |
1570 | } | |
1571 | ||
1572 | DEBUG_ARC_RELOC (reloc_data); | |
34e967a5 MC |
1573 | |
1574 | if (arc_do_relocation (contents, reloc_data, info) != bfd_reloc_ok) | |
886a2506 NC |
1575 | return FALSE; |
1576 | } | |
1577 | ||
1578 | return TRUE; | |
1579 | } | |
1580 | ||
1581 | static struct dynamic_sections | |
1582 | arc_create_dynamic_sections (bfd * abfd, struct bfd_link_info *info) | |
1583 | { | |
34e967a5 MC |
1584 | struct elf_link_hash_table *htab; |
1585 | bfd *dynobj; | |
886a2506 | 1586 | struct dynamic_sections ds = |
886a2506 | 1587 | { |
34e967a5 MC |
1588 | .initialized = FALSE, |
1589 | .sgot = NULL, | |
1590 | .srelgot = NULL, | |
1591 | .sgotplt = NULL, | |
1592 | .srelgotplt = NULL, | |
1593 | .sdyn = NULL, | |
1594 | .splt = NULL, | |
1595 | .srelplt = NULL | |
1596 | }; | |
1597 | ||
1598 | htab = elf_hash_table (info); | |
1599 | BFD_ASSERT (htab); | |
1600 | ||
1601 | /* Create dynamic sections for relocatable executables so that we | |
1602 | can copy relocations. */ | |
1603 | if (! htab->dynamic_sections_created && bfd_link_pic (info)) | |
1604 | { | |
1605 | if (! _bfd_elf_link_create_dynamic_sections (abfd, info)) | |
1606 | BFD_ASSERT (0); | |
886a2506 | 1607 | } |
886a2506 | 1608 | |
34e967a5 | 1609 | dynobj = (elf_hash_table (info))->dynobj; |
886a2506 | 1610 | |
34e967a5 | 1611 | if (dynobj) |
886a2506 | 1612 | { |
34e967a5 MC |
1613 | ds.sgot = htab->sgot; |
1614 | ds.srelgot = htab->srelgot; | |
886a2506 | 1615 | |
34e967a5 MC |
1616 | ds.sgotplt = bfd_get_section_by_name (dynobj, ".got.plt"); |
1617 | ds.srelgotplt = ds.srelplt; | |
886a2506 | 1618 | |
34e967a5 MC |
1619 | ds.splt = bfd_get_section_by_name (dynobj, ".plt"); |
1620 | ds.srelplt = bfd_get_section_by_name (dynobj, ".rela.plt"); | |
1621 | } | |
1622 | ||
1623 | if (htab->dynamic_sections_created) | |
1624 | { | |
1625 | ds.sdyn = bfd_get_section_by_name (dynobj, ".dynamic"); | |
1626 | } | |
886a2506 NC |
1627 | |
1628 | ds.initialized = TRUE; | |
1629 | ||
1630 | return ds; | |
1631 | } | |
1632 | ||
34e967a5 MC |
1633 | #define ADD_SYMBOL_REF_SEC_AND_RELOC(SECNAME, COND_FOR_RELOC, H) \ |
1634 | htab->s##SECNAME->size; \ | |
1635 | { \ | |
1636 | if (COND_FOR_RELOC) \ | |
1637 | { \ | |
1638 | htab->srel##SECNAME->size += sizeof (Elf32_External_Rela); \ | |
1639 | ARC_DEBUG ("arc_info: Added reloc space in " \ | |
1640 | #SECNAME " section at " __FILE__ \ | |
1641 | ":%d for symbol\n", \ | |
1642 | __LINE__, name_for_global_symbol (H)); \ | |
1643 | } \ | |
1644 | if (H) \ | |
1645 | if (h->dynindx == -1 && !h->forced_local) \ | |
1646 | if (! bfd_elf_link_record_dynamic_symbol (info, H)) \ | |
1647 | return FALSE; \ | |
1648 | htab->s##SECNAME->size += 4; \ | |
1649 | } | |
886a2506 NC |
1650 | |
1651 | static bfd_boolean | |
34e967a5 | 1652 | elf_arc_check_relocs (bfd * abfd, |
886a2506 | 1653 | struct bfd_link_info * info, |
34e967a5 | 1654 | asection * sec, |
886a2506 NC |
1655 | const Elf_Internal_Rela * relocs) |
1656 | { | |
34e967a5 MC |
1657 | Elf_Internal_Shdr * symtab_hdr; |
1658 | struct elf_link_hash_entry ** sym_hashes; | |
1659 | struct got_entry ** local_got_ents; | |
1660 | const Elf_Internal_Rela * rel; | |
1661 | const Elf_Internal_Rela * rel_end; | |
1662 | bfd * dynobj; | |
1663 | asection * sreloc = NULL; | |
1664 | struct elf_link_hash_table * htab = elf_hash_table (info); | |
1665 | ||
1666 | if (bfd_link_relocatable (info)) | |
1667 | return TRUE; | |
886a2506 NC |
1668 | |
1669 | dynobj = (elf_hash_table (info))->dynobj; | |
1670 | symtab_hdr = &((elf_tdata (abfd))->symtab_hdr); | |
1671 | sym_hashes = elf_sym_hashes (abfd); | |
34e967a5 | 1672 | local_got_ents = arc_get_local_got_ents (abfd); |
886a2506 NC |
1673 | |
1674 | rel_end = relocs + sec->reloc_count; | |
1675 | for (rel = relocs; rel < rel_end; rel++) | |
1676 | { | |
1677 | enum elf_arc_reloc_type r_type; | |
1678 | reloc_howto_type *howto; | |
1679 | unsigned long r_symndx; | |
1680 | struct elf_link_hash_entry *h; | |
1681 | ||
1682 | r_type = ELF32_R_TYPE (rel->r_info); | |
1683 | ||
1684 | if (r_type >= (int) R_ARC_max) | |
1685 | { | |
1686 | bfd_set_error (bfd_error_bad_value); | |
1687 | return FALSE; | |
1688 | } | |
34e967a5 MC |
1689 | howto = &elf_arc_howto_table[r_type]; |
1690 | ||
1691 | if (dynobj == NULL | |
1692 | && (is_reloc_for_GOT (howto) == TRUE | |
1693 | || is_reloc_for_TLS (howto) == TRUE)) | |
1694 | { | |
1695 | dynobj = elf_hash_table (info)->dynobj = abfd; | |
1696 | if (! _bfd_elf_create_got_section (abfd, info)) | |
1697 | return FALSE; | |
1698 | } | |
886a2506 NC |
1699 | |
1700 | /* Load symbol information. */ | |
1701 | r_symndx = ELF32_R_SYM (rel->r_info); | |
1702 | if (r_symndx < symtab_hdr->sh_info) /* Is a local symbol. */ | |
1703 | h = NULL; | |
1704 | else /* Global one. */ | |
1705 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
1706 | ||
34e967a5 MC |
1707 | switch (r_type) |
1708 | { | |
1709 | case R_ARC_32: | |
1710 | case R_ARC_32_ME: | |
1711 | /* During shared library creation, these relocs should not | |
1712 | appear in a shared library (as memory will be read only | |
1713 | and the dynamic linker can not resolve these. However | |
1714 | the error should not occur for e.g. debugging or | |
1715 | non-readonly sections. */ | |
1716 | if (bfd_link_dll (info) && !bfd_link_pie (info) | |
1717 | && (sec->flags & SEC_ALLOC) != 0 | |
1718 | && (sec->flags & SEC_READONLY) != 0) | |
1719 | { | |
1720 | const char *name; | |
1721 | if (h) | |
1722 | name = h->root.root.string; | |
1723 | else | |
1724 | /* bfd_elf_sym_name (abfd, symtab_hdr, isym, NULL); */ | |
1725 | name = "UNKNOWN"; | |
1726 | (*_bfd_error_handler) | |
1727 | (_("\ | |
1728 | %B: relocation %s against `%s' can not be used when making a shared object; recompile with -fPIC"), | |
1729 | abfd, | |
1730 | arc_elf_howto (r_type)->name, | |
1731 | name); | |
1732 | bfd_set_error (bfd_error_bad_value); | |
1733 | return FALSE; | |
1734 | } | |
1735 | ||
1736 | /* In some cases we are not setting the 'non_got_ref' | |
1737 | flag, even though the relocations don't require a GOT | |
1738 | access. We should extend the testing in this area to | |
1739 | ensure that no significant cases are being missed. */ | |
1740 | if (h) | |
1741 | h->non_got_ref = 1; | |
1742 | /* FALLTHROUGH */ | |
1743 | case R_ARC_PC32: | |
1744 | case R_ARC_32_PCREL: | |
7e458899 | 1745 | if (bfd_link_pic (info) && !bfd_link_pie (info) |
34e967a5 MC |
1746 | && ((r_type != R_ARC_PC32 && r_type != R_ARC_32_PCREL) |
1747 | || (h != NULL | |
1748 | && h->dynindx != -1 | |
1749 | && (!info->symbolic || !h->def_regular)))) | |
1750 | { | |
1751 | if (sreloc == NULL) | |
1752 | { | |
1753 | sreloc = _bfd_elf_make_dynamic_reloc_section (sec, dynobj, | |
1754 | 2, abfd, | |
1755 | /*rela*/ | |
1756 | TRUE); | |
1757 | ||
1758 | if (sreloc == NULL) | |
1759 | return FALSE; | |
1760 | } | |
1761 | sreloc->size += sizeof (Elf32_External_Rela); | |
1762 | ||
1763 | } | |
1764 | default: | |
1765 | break; | |
1766 | } | |
1767 | ||
886a2506 NC |
1768 | if (is_reloc_for_PLT (howto) == TRUE) |
1769 | { | |
1770 | if (h == NULL) | |
1771 | continue; | |
1772 | else | |
1773 | h->needs_plt = 1; | |
1774 | } | |
1775 | ||
1776 | if (is_reloc_for_GOT (howto) == TRUE) | |
1777 | { | |
1778 | if (h == NULL) | |
1779 | { | |
1780 | /* Local symbol. */ | |
34e967a5 MC |
1781 | if (local_got_ents[r_symndx] == NULL) |
1782 | { | |
1783 | bfd_vma offset = | |
1784 | ADD_SYMBOL_REF_SEC_AND_RELOC (got, | |
1785 | bfd_link_pic (info), | |
1786 | NULL); | |
1787 | new_got_entry_to_list (&(local_got_ents[r_symndx]), | |
1788 | GOT_NORMAL, offset, NONE); | |
1789 | } | |
886a2506 NC |
1790 | } |
1791 | else | |
1792 | { | |
1793 | /* Global symbol. */ | |
1794 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
34e967a5 MC |
1795 | if (h->got.glist == NULL) |
1796 | { | |
1797 | bfd_vma offset = | |
1798 | ADD_SYMBOL_REF_SEC_AND_RELOC (got, TRUE, h); | |
1799 | new_got_entry_to_list (&h->got.glist, | |
1800 | GOT_NORMAL, offset, NONE); | |
1801 | } | |
886a2506 NC |
1802 | } |
1803 | } | |
886a2506 | 1804 | |
34e967a5 MC |
1805 | if (is_reloc_for_TLS (howto) == TRUE) |
1806 | { | |
1807 | enum tls_type_e type = GOT_UNKNOWN; | |
886a2506 | 1808 | |
34e967a5 MC |
1809 | switch (r_type) |
1810 | { | |
1811 | case R_ARC_TLS_GD_GOT: | |
1812 | type = GOT_TLS_GD; | |
1813 | break; | |
1814 | case R_ARC_TLS_IE_GOT: | |
1815 | type = GOT_TLS_IE; | |
1816 | break; | |
1817 | default: | |
1818 | break; | |
1819 | } | |
886a2506 | 1820 | |
34e967a5 MC |
1821 | struct got_entry **list = NULL; |
1822 | if (h != NULL) | |
1823 | list = &(h->got.glist); | |
1824 | else | |
1825 | list = &(local_got_ents[r_symndx]); | |
886a2506 | 1826 | |
34e967a5 MC |
1827 | if (type != GOT_UNKNOWN && !symbol_has_entry_of_type (*list, type)) |
1828 | { | |
1829 | enum tls_got_entries entries = NONE; | |
1830 | bfd_vma offset = | |
1831 | ADD_SYMBOL_REF_SEC_AND_RELOC (got, TRUE, h); | |
886a2506 | 1832 | |
34e967a5 MC |
1833 | if (type == GOT_TLS_GD) |
1834 | { | |
1835 | bfd_vma ATTRIBUTE_UNUSED notneeded = | |
1836 | ADD_SYMBOL_REF_SEC_AND_RELOC (got, TRUE, h); | |
1837 | entries = MOD_AND_OFF; | |
1838 | } | |
886a2506 | 1839 | |
34e967a5 MC |
1840 | if (entries == NONE) |
1841 | entries = OFF; | |
886a2506 | 1842 | |
34e967a5 MC |
1843 | new_got_entry_to_list (list, type, offset, entries); |
1844 | } | |
1845 | } | |
1846 | } | |
886a2506 | 1847 | |
34e967a5 MC |
1848 | return TRUE; |
1849 | } | |
886a2506 | 1850 | |
34e967a5 | 1851 | #define ELF_DYNAMIC_INTERPRETER "/sbin/ld-uClibc.so" |
886a2506 | 1852 | |
34e967a5 MC |
1853 | static struct plt_version_t * |
1854 | arc_get_plt_version (struct bfd_link_info *info) | |
886a2506 | 1855 | { |
34e967a5 | 1856 | int i; |
886a2506 | 1857 | |
34e967a5 MC |
1858 | for (i = 0; i < 1; i++) |
1859 | { | |
1860 | ARC_DEBUG ("%d: size1 = %d, size2 = %d\n", i, | |
1861 | plt_versions[i].entry_size, | |
1862 | plt_versions[i].elem_size); | |
1863 | } | |
886a2506 | 1864 | |
34e967a5 | 1865 | if (bfd_get_mach (info->output_bfd) == bfd_mach_arc_arcv2) |
886a2506 | 1866 | { |
34e967a5 MC |
1867 | if (bfd_link_pic (info)) |
1868 | return &(plt_versions[ELF_ARCV2_PIC]); | |
1869 | else | |
1870 | return &(plt_versions[ELF_ARCV2_ABS]); | |
1871 | } | |
1872 | else | |
886a2506 | 1873 | { |
34e967a5 MC |
1874 | if (bfd_link_pic (info)) |
1875 | return &(plt_versions[ELF_ARC_PIC]); | |
1876 | else | |
1877 | return &(plt_versions[ELF_ARC_ABS]); | |
886a2506 | 1878 | } |
886a2506 NC |
1879 | } |
1880 | ||
1881 | static bfd_vma | |
1882 | add_symbol_to_plt (struct bfd_link_info *info) | |
1883 | { | |
34e967a5 | 1884 | struct elf_link_hash_table *htab = elf_hash_table (info); |
886a2506 NC |
1885 | bfd_vma ret; |
1886 | ||
34e967a5 | 1887 | struct plt_version_t *plt_data = arc_get_plt_version (info); |
886a2506 | 1888 | |
34e967a5 MC |
1889 | /* If this is the first .plt entry, make room for the special first |
1890 | entry. */ | |
1891 | if (htab->splt->size == 0) | |
1892 | htab->splt->size += plt_data->entry_size; | |
886a2506 | 1893 | |
34e967a5 MC |
1894 | ret = htab->splt->size; |
1895 | ||
1896 | htab->splt->size += plt_data->elem_size; | |
1897 | ARC_DEBUG ("PLT_SIZE = %d\n", htab->splt->size); | |
1898 | ||
1899 | htab->sgotplt->size += 4; | |
1900 | htab->srelplt->size += sizeof (Elf32_External_Rela); | |
886a2506 NC |
1901 | |
1902 | return ret; | |
1903 | } | |
1904 | ||
34e967a5 MC |
1905 | #define PLT_DO_RELOCS_FOR_ENTRY(ABFD, DS, RELOCS) \ |
1906 | plt_do_relocs_for_symbol (ABFD, DS, RELOCS, 0, 0) | |
886a2506 NC |
1907 | |
1908 | static void | |
34e967a5 MC |
1909 | plt_do_relocs_for_symbol (bfd *abfd, |
1910 | struct elf_link_hash_table *htab, | |
1911 | const struct plt_reloc *reloc, | |
886a2506 NC |
1912 | bfd_vma plt_offset, |
1913 | bfd_vma symbol_got_offset) | |
1914 | { | |
1915 | while (SYM_ONLY (reloc->symbol) != LAST_RELOC) | |
1916 | { | |
1917 | bfd_vma relocation = 0; | |
1918 | ||
1919 | switch (SYM_ONLY (reloc->symbol)) | |
1920 | { | |
1921 | case SGOT: | |
1922 | relocation = | |
34e967a5 MC |
1923 | htab->sgotplt->output_section->vma + |
1924 | htab->sgotplt->output_offset + symbol_got_offset; | |
886a2506 NC |
1925 | break; |
1926 | } | |
1927 | relocation += reloc->addend; | |
1928 | ||
34e967a5 MC |
1929 | if (IS_RELATIVE (reloc->symbol)) |
1930 | { | |
1931 | bfd_vma reloc_offset = reloc->offset; | |
1932 | reloc_offset -= (IS_INSN_32 (reloc->symbol)) ? 4 : 0; | |
1933 | reloc_offset -= (IS_INSN_24 (reloc->symbol)) ? 2 : 0; | |
886a2506 | 1934 | |
34e967a5 MC |
1935 | relocation -= htab->splt->output_section->vma |
1936 | + htab->splt->output_offset | |
1937 | + plt_offset + reloc_offset; | |
1938 | } | |
1939 | ||
1940 | /* TODO: being ME is not a property of the relocation but of the | |
1941 | section of which is applying the relocation. */ | |
1942 | if (IS_MIDDLE_ENDIAN (reloc->symbol) || bfd_big_endian (abfd)) | |
886a2506 NC |
1943 | { |
1944 | relocation = | |
1945 | ((relocation & 0xffff0000) >> 16) | | |
1946 | ((relocation & 0xffff) << 16); | |
1947 | } | |
1948 | ||
1949 | switch (reloc->size) | |
1950 | { | |
1951 | case 32: | |
34e967a5 | 1952 | bfd_put_32 (htab->splt->output_section->owner, |
886a2506 | 1953 | relocation, |
34e967a5 | 1954 | htab->splt->contents + plt_offset + reloc->offset); |
886a2506 NC |
1955 | break; |
1956 | } | |
1957 | ||
34e967a5 | 1958 | reloc = &(reloc[1]); /* Jump to next relocation. */ |
886a2506 NC |
1959 | } |
1960 | } | |
1961 | ||
1962 | static void | |
34e967a5 MC |
1963 | relocate_plt_for_symbol (bfd *output_bfd, |
1964 | struct bfd_link_info *info, | |
886a2506 NC |
1965 | struct elf_link_hash_entry *h) |
1966 | { | |
34e967a5 MC |
1967 | struct plt_version_t *plt_data = arc_get_plt_version (info); |
1968 | struct elf_link_hash_table *htab = elf_hash_table (info); | |
886a2506 | 1969 | |
34e967a5 MC |
1970 | bfd_vma plt_index = (h->plt.offset - plt_data->entry_size) |
1971 | / plt_data->elem_size; | |
886a2506 NC |
1972 | bfd_vma got_offset = (plt_index + 3) * 4; |
1973 | ||
34e967a5 MC |
1974 | ARC_DEBUG ("arc_info: PLT_OFFSET = 0x%x, PLT_ENTRY_VMA = 0x%x, \ |
1975 | GOT_ENTRY_OFFSET = 0x%x, GOT_ENTRY_VMA = 0x%x, for symbol %s\n", | |
1976 | h->plt.offset, | |
1977 | htab->splt->output_section->vma | |
1978 | + htab->splt->output_offset | |
1979 | + h->plt.offset, | |
1980 | got_offset, | |
1981 | htab->sgotplt->output_section->vma | |
1982 | + htab->sgotplt->output_offset | |
1983 | + got_offset, | |
1984 | h->root.root.string); | |
1985 | ||
1986 | memcpy (htab->splt->contents + h->plt.offset, | |
1987 | plt_data->elem, | |
1988 | plt_data->elem_size); | |
1989 | plt_do_relocs_for_symbol (output_bfd, htab, | |
1990 | plt_data->elem_relocs, | |
1991 | h->plt.offset, | |
886a2506 | 1992 | got_offset); |
34e967a5 MC |
1993 | |
1994 | /* Fill in the entry in the global offset table. */ | |
1995 | bfd_put_32 (output_bfd, | |
1996 | (bfd_vma) (htab->splt->output_section->vma | |
1997 | + htab->splt->output_offset), | |
1998 | htab->sgotplt->contents + got_offset); | |
1999 | ||
2000 | /* TODO: Fill in the entry in the .rela.plt section. */ | |
2001 | { | |
2002 | Elf_Internal_Rela rel; | |
2003 | bfd_byte *loc; | |
2004 | ||
2005 | rel.r_offset = (htab->sgotplt->output_section->vma | |
2006 | + htab->sgotplt->output_offset | |
2007 | + got_offset); | |
2008 | rel.r_addend = 0; | |
94e5c971 CZ |
2009 | |
2010 | BFD_ASSERT (h->dynindx != -1); | |
34e967a5 MC |
2011 | rel.r_info = ELF32_R_INFO (h->dynindx, R_ARC_JMP_SLOT); |
2012 | ||
2013 | loc = htab->srelplt->contents; | |
2014 | loc += plt_index * sizeof (Elf32_External_Rela); /* relA */ | |
2015 | bfd_elf32_swap_reloca_out (output_bfd, &rel, loc); | |
2016 | } | |
886a2506 NC |
2017 | } |
2018 | ||
2019 | static void | |
34e967a5 MC |
2020 | relocate_plt_for_entry (bfd *abfd, |
2021 | struct bfd_link_info *info) | |
886a2506 | 2022 | { |
34e967a5 MC |
2023 | struct plt_version_t *plt_data = arc_get_plt_version (info); |
2024 | struct elf_link_hash_table *htab = elf_hash_table (info); | |
886a2506 | 2025 | |
34e967a5 MC |
2026 | memcpy (htab->splt->contents, plt_data->entry, |
2027 | plt_data->entry_size); | |
2028 | PLT_DO_RELOCS_FOR_ENTRY (abfd, htab, plt_data->entry_relocs); | |
886a2506 NC |
2029 | } |
2030 | ||
34e967a5 MC |
2031 | /* Desc : Adjust a symbol defined by a dynamic object and referenced |
2032 | by a regular object. The current definition is in some section of | |
2033 | the dynamic object, but we're not including those sections. We | |
2034 | have to change the definition to something the rest of the link can | |
886a2506 NC |
2035 | understand. */ |
2036 | ||
2037 | static bfd_boolean | |
2038 | elf_arc_adjust_dynamic_symbol (struct bfd_link_info *info, | |
2039 | struct elf_link_hash_entry *h) | |
2040 | { | |
34e967a5 MC |
2041 | asection *s; |
2042 | unsigned int power_of_two; | |
886a2506 | 2043 | bfd *dynobj = (elf_hash_table (info))->dynobj; |
34e967a5 | 2044 | struct elf_link_hash_table *htab = elf_hash_table (info); |
886a2506 | 2045 | |
34e967a5 MC |
2046 | if (h->type == STT_FUNC |
2047 | || h->type == STT_GNU_IFUNC | |
2048 | || h->needs_plt == 1) | |
886a2506 NC |
2049 | { |
2050 | if (!bfd_link_pic (info) && !h->def_dynamic && !h->ref_dynamic) | |
2051 | { | |
2052 | /* This case can occur if we saw a PLT32 reloc in an input | |
2053 | file, but the symbol was never referred to by a dynamic | |
2054 | object. In such a case, we don't actually need to build | |
2055 | a procedure linkage table, and we can just do a PC32 | |
2056 | reloc instead. */ | |
2057 | BFD_ASSERT (h->needs_plt); | |
2058 | return TRUE; | |
2059 | } | |
2060 | ||
2061 | /* Make sure this symbol is output as a dynamic symbol. */ | |
2062 | if (h->dynindx == -1 && !h->forced_local | |
2063 | && !bfd_elf_link_record_dynamic_symbol (info, h)) | |
2064 | return FALSE; | |
2065 | ||
34e967a5 MC |
2066 | if (bfd_link_pic (info) |
2067 | || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h)) | |
886a2506 NC |
2068 | { |
2069 | bfd_vma loc = add_symbol_to_plt (info); | |
2070 | ||
2071 | if (!bfd_link_pic (info) && !h->def_regular) | |
2072 | { | |
34e967a5 | 2073 | h->root.u.def.section = htab->splt; |
886a2506 NC |
2074 | h->root.u.def.value = loc; |
2075 | } | |
2076 | h->plt.offset = loc; | |
2077 | } | |
34e967a5 MC |
2078 | else |
2079 | { | |
2080 | h->plt.offset = (bfd_vma) -1; | |
2081 | h->needs_plt = 0; | |
2082 | } | |
2083 | return TRUE; | |
886a2506 | 2084 | } |
34e967a5 MC |
2085 | |
2086 | /* If this is a weak symbol, and there is a real definition, the | |
2087 | processor independent code will have arranged for us to see the | |
2088 | real definition first, and we can just use the same value. */ | |
2089 | if (h->u.weakdef != NULL) | |
886a2506 | 2090 | { |
34e967a5 MC |
2091 | BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined |
2092 | || h->u.weakdef->root.type == bfd_link_hash_defweak); | |
2093 | h->root.u.def.section = h->u.weakdef->root.u.def.section; | |
2094 | h->root.u.def.value = h->u.weakdef->root.u.def.value; | |
2095 | return TRUE; | |
886a2506 NC |
2096 | } |
2097 | ||
34e967a5 MC |
2098 | /* If there are no non-GOT references, we do not need a copy |
2099 | relocation. */ | |
2100 | if (!h->non_got_ref) | |
2101 | return TRUE; | |
2102 | ||
2103 | /* This is a reference to a symbol defined by a dynamic object which | |
2104 | is not a function. */ | |
2105 | ||
2106 | /* If we are creating a shared library, we must presume that the | |
2107 | only references to the symbol are via the global offset table. | |
2108 | For such cases we need not do anything here; the relocations will | |
2109 | be handled correctly by relocate_section. */ | |
2110 | if (bfd_link_pic (info)) | |
2111 | return TRUE; | |
2112 | ||
2113 | /* We must allocate the symbol in our .dynbss section, which will | |
2114 | become part of the .bss section of the executable. There will be | |
2115 | an entry for this symbol in the .dynsym section. The dynamic | |
2116 | object will contain position independent code, so all references | |
2117 | from the dynamic object to this symbol will go through the global | |
2118 | offset table. The dynamic linker will use the .dynsym entry to | |
2119 | determine the address it must put in the global offset table, so | |
2120 | both the dynamic object and the regular object will refer to the | |
2121 | same memory location for the variable. */ | |
2122 | ||
2123 | s = bfd_get_section_by_name (dynobj, ".dynbss"); | |
2124 | BFD_ASSERT (s != NULL); | |
2125 | ||
2126 | /* We must generate a R_ARC_COPY reloc to tell the dynamic linker to | |
2127 | copy the initial value out of the dynamic object and into the | |
2128 | runtime process image. We need to remember the offset into the | |
2129 | .rela.bss section we are going to use. */ | |
2130 | if ((h->root.u.def.section->flags & SEC_ALLOC) != 0) | |
2131 | { | |
2132 | asection *srel; | |
2133 | ||
2134 | srel = bfd_get_section_by_name (dynobj, ".rela.bss"); | |
2135 | BFD_ASSERT (srel != NULL); | |
2136 | srel->size += sizeof (Elf32_External_Rela); | |
2137 | h->needs_copy = 1; | |
2138 | } | |
2139 | ||
2140 | /* We need to figure out the alignment required for this symbol. I | |
2141 | have no idea how ELF linkers handle this. */ | |
2142 | power_of_two = bfd_log2 (h->size); | |
2143 | if (power_of_two > 3) | |
2144 | power_of_two = 3; | |
886a2506 | 2145 | |
34e967a5 MC |
2146 | /* Apply the required alignment. */ |
2147 | s->size = BFD_ALIGN (s->size, (bfd_size_type) (1 << power_of_two)); | |
2148 | if (power_of_two > bfd_get_section_alignment (dynobj, s)) | |
2149 | { | |
2150 | if (! bfd_set_section_alignment (dynobj, s, power_of_two)) | |
2151 | return FALSE; | |
2152 | } | |
2153 | ||
2154 | /* Define the symbol as being at this point in the section. */ | |
2155 | h->root.u.def.section = s; | |
2156 | h->root.u.def.value = s->size; | |
2157 | ||
2158 | /* Increment the section size to make room for the symbol. */ | |
2159 | s->size += h->size; | |
2160 | ||
2161 | return TRUE; | |
886a2506 NC |
2162 | } |
2163 | ||
2164 | /* Function : elf_arc_finish_dynamic_symbol | |
2165 | Brief : Finish up dynamic symbol handling. We set the | |
34e967a5 | 2166 | contents of various dynamic sections here. |
886a2506 | 2167 | Args : output_bfd : |
34e967a5 MC |
2168 | info : |
2169 | h : | |
2170 | sym : | |
886a2506 | 2171 | Returns : True/False as the return status. */ |
34e967a5 | 2172 | |
886a2506 NC |
2173 | static bfd_boolean |
2174 | elf_arc_finish_dynamic_symbol (bfd * output_bfd, | |
2175 | struct bfd_link_info *info, | |
2176 | struct elf_link_hash_entry *h, | |
2177 | Elf_Internal_Sym * sym) | |
2178 | { | |
34e967a5 | 2179 | if (h->plt.offset != (bfd_vma) -1) |
886a2506 | 2180 | { |
34e967a5 MC |
2181 | relocate_plt_for_symbol (output_bfd, info, h); |
2182 | ||
2183 | if (!h->def_regular) | |
886a2506 | 2184 | { |
34e967a5 MC |
2185 | /* Mark the symbol as undefined, rather than as defined in |
2186 | the .plt section. Leave the value alone. */ | |
2187 | sym->st_shndx = SHN_UNDEF; | |
886a2506 | 2188 | } |
34e967a5 MC |
2189 | } |
2190 | ||
2191 | if (h->got.glist != NULL) | |
2192 | { | |
2193 | struct got_entry *list = h->got.glist; | |
2194 | ||
2195 | /* Traverse the list of got entries for this symbol. */ | |
2196 | while (list) | |
886a2506 | 2197 | { |
34e967a5 MC |
2198 | bfd_vma got_offset = h->got.glist->offset; |
2199 | ||
2200 | if (list->type == GOT_NORMAL | |
2201 | && list->created_dyn_relocation == FALSE) | |
2202 | { | |
2203 | if (bfd_link_pic (info) | |
2204 | && (info->symbolic || h->dynindx == -1) | |
2205 | && h->def_regular) | |
2206 | { | |
2207 | ADD_RELA (output_bfd, got, got_offset, 0, R_ARC_RELATIVE, 0); | |
2208 | } | |
94e5c971 CZ |
2209 | /* Do not fully understand the side effects of this condition. |
2210 | The relocation space might still being reserved. Perhaps | |
2211 | I should clear its value. */ | |
2212 | else if (h->dynindx != -1) | |
34e967a5 MC |
2213 | { |
2214 | ADD_RELA (output_bfd, got, got_offset, h->dynindx, | |
2215 | R_ARC_GLOB_DAT, 0); | |
2216 | } | |
2217 | list->created_dyn_relocation = TRUE; | |
2218 | } | |
2219 | else if (list->existing_entries != NONE) | |
2220 | { | |
2221 | struct elf_link_hash_table *htab = elf_hash_table (info); | |
2222 | enum tls_got_entries e = list->existing_entries; | |
2223 | ||
2224 | BFD_ASSERT (list->type != GOT_TLS_GD | |
2225 | || list->existing_entries == MOD_AND_OFF); | |
2226 | ||
840855c5 | 2227 | bfd_vma dynindx = h->dynindx == -1 ? 0 : h->dynindx; |
34e967a5 MC |
2228 | if (e == MOD_AND_OFF || e == MOD) |
2229 | { | |
840855c5 | 2230 | ADD_RELA (output_bfd, got, got_offset, dynindx, |
34e967a5 MC |
2231 | R_ARC_TLS_DTPMOD, 0); |
2232 | ARC_DEBUG ("arc_info: TLS_DYNRELOC: type = %d, \ | |
2233 | GOT_OFFSET = 0x%x, GOT_VMA = 0x%x, INDEX = %d, ADDEND = 0x%x\n", | |
2234 | list->type, | |
2235 | got_offset, | |
2236 | htab->sgot->output_section->vma | |
2237 | + htab->sgot->output_offset + got_offset, | |
840855c5 | 2238 | dynindx, 0); |
34e967a5 MC |
2239 | } |
2240 | if (e == MOD_AND_OFF || e == OFF) | |
2241 | { | |
2242 | bfd_vma addend = 0; | |
2243 | if (list->type == GOT_TLS_IE) | |
2244 | addend = bfd_get_32 (output_bfd, | |
2245 | htab->sgot->contents + got_offset); | |
2246 | ||
2247 | ADD_RELA (output_bfd, got, | |
2248 | got_offset + (e == MOD_AND_OFF ? 4 : 0), | |
840855c5 | 2249 | dynindx, |
34e967a5 MC |
2250 | (list->type == GOT_TLS_IE ? |
2251 | R_ARC_TLS_TPOFF : R_ARC_TLS_DTPOFF), | |
2252 | addend); | |
2253 | ||
2254 | ARC_DEBUG ("arc_info: TLS_DYNRELOC: type = %d, \ | |
2255 | GOT_OFFSET = 0x%x, GOT_VMA = 0x%x, INDEX = %d, ADDEND = 0x%x\n", | |
2256 | list->type, | |
2257 | got_offset, | |
2258 | htab->sgot->output_section->vma | |
2259 | + htab->sgot->output_offset + got_offset, | |
840855c5 | 2260 | dynindx, addend); |
34e967a5 MC |
2261 | } |
2262 | } | |
2263 | ||
2264 | list = list->next; | |
886a2506 | 2265 | } |
34e967a5 MC |
2266 | |
2267 | h->got.glist = NULL; | |
2268 | } | |
2269 | ||
2270 | if (h->needs_copy) | |
2271 | { | |
2272 | bfd_vma rel_offset = (h->root.u.def.value | |
2273 | + h->root.u.def.section->output_section->vma | |
2274 | + h->root.u.def.section->output_offset); | |
2275 | ||
2276 | asection *srelbss = | |
2277 | bfd_get_section_by_name (h->root.u.def.section->owner, | |
2278 | ".rela.bss"); | |
2279 | ||
23a42089 NC |
2280 | bfd_byte * loc = srelbss->contents |
2281 | + (srelbss->reloc_count * sizeof (Elf32_External_Rela)); | |
34e967a5 MC |
2282 | srelbss->reloc_count++; |
2283 | ||
2284 | Elf_Internal_Rela rel; | |
2285 | rel.r_addend = 0; | |
2286 | rel.r_offset = rel_offset; | |
94e5c971 CZ |
2287 | |
2288 | BFD_ASSERT (h->dynindx != -1); | |
34e967a5 MC |
2289 | rel.r_info = ELF32_R_INFO (h->dynindx, R_ARC_COPY); |
2290 | ||
23a42089 | 2291 | bfd_elf32_swap_reloca_out (output_bfd, &rel, loc); |
886a2506 NC |
2292 | } |
2293 | ||
2294 | /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */ | |
2295 | if (strcmp (h->root.root.string, "_DYNAMIC") == 0 | |
2296 | || strcmp (h->root.root.string, "__DYNAMIC") == 0 | |
2297 | || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0) | |
2298 | sym->st_shndx = SHN_ABS; | |
2299 | ||
2300 | return TRUE; | |
2301 | } | |
2302 | ||
34e967a5 MC |
2303 | #define GET_SYMBOL_OR_SECTION(TAG, SYMBOL, SECTION, ASSERT) \ |
2304 | case TAG: \ | |
2305 | if (SYMBOL != NULL) \ | |
2306 | { \ | |
2307 | h = elf_link_hash_lookup (elf_hash_table (info), \ | |
2308 | SYMBOL, FALSE, FALSE, TRUE); \ | |
2309 | } \ | |
2310 | else if (SECTION != NULL) \ | |
2311 | { \ | |
2312 | s = bfd_get_section_by_name (output_bfd, SECTION); \ | |
2313 | BFD_ASSERT (s != NULL || !ASSERT); \ | |
2314 | do_it = TRUE; \ | |
2315 | } \ | |
2316 | break; | |
886a2506 NC |
2317 | |
2318 | /* Function : elf_arc_finish_dynamic_sections | |
2319 | Brief : Finish up the dynamic sections handling. | |
2320 | Args : output_bfd : | |
34e967a5 MC |
2321 | info : |
2322 | h : | |
2323 | sym : | |
886a2506 | 2324 | Returns : True/False as the return status. */ |
34e967a5 | 2325 | |
886a2506 | 2326 | static bfd_boolean |
34e967a5 MC |
2327 | elf_arc_finish_dynamic_sections (bfd * output_bfd, |
2328 | struct bfd_link_info *info) | |
886a2506 NC |
2329 | { |
2330 | struct dynamic_sections ds = arc_create_dynamic_sections (output_bfd, info); | |
34e967a5 | 2331 | struct elf_link_hash_table *htab = elf_hash_table (info); |
886a2506 NC |
2332 | bfd *dynobj = (elf_hash_table (info))->dynobj; |
2333 | ||
2334 | if (ds.sdyn) | |
2335 | { | |
2336 | Elf32_External_Dyn *dyncon, *dynconend; | |
2337 | ||
2338 | dyncon = (Elf32_External_Dyn *) ds.sdyn->contents; | |
2339 | dynconend = | |
34e967a5 | 2340 | (Elf32_External_Dyn *) (ds.sdyn->contents + ds.sdyn->size); |
886a2506 NC |
2341 | for (; dyncon < dynconend; dyncon++) |
2342 | { | |
2343 | Elf_Internal_Dyn internal_dyn; | |
2344 | bfd_boolean do_it = FALSE; | |
2345 | ||
2346 | struct elf_link_hash_entry *h = NULL; | |
2347 | asection *s = NULL; | |
2348 | ||
2349 | bfd_elf32_swap_dyn_in (dynobj, dyncon, &internal_dyn); | |
2350 | ||
2351 | switch (internal_dyn.d_tag) | |
2352 | { | |
34e967a5 MC |
2353 | GET_SYMBOL_OR_SECTION (DT_INIT, "_init", NULL, TRUE) |
2354 | GET_SYMBOL_OR_SECTION (DT_FINI, "_fini", NULL, TRUE) | |
2355 | GET_SYMBOL_OR_SECTION (DT_PLTGOT, NULL, ".plt", TRUE) | |
2356 | GET_SYMBOL_OR_SECTION (DT_JMPREL, NULL, ".rela.plt", TRUE) | |
2357 | GET_SYMBOL_OR_SECTION (DT_PLTRELSZ, NULL, ".rela.plt", TRUE) | |
2358 | GET_SYMBOL_OR_SECTION (DT_RELASZ, NULL, ".rela.plt", FALSE) | |
2359 | GET_SYMBOL_OR_SECTION (DT_VERSYM, NULL, ".gnu.version", TRUE) | |
2360 | GET_SYMBOL_OR_SECTION (DT_VERDEF, NULL, ".gnu.version_d", TRUE) | |
2361 | GET_SYMBOL_OR_SECTION (DT_VERNEED, NULL, ".gnu.version_r", TRUE) | |
886a2506 NC |
2362 | default: |
2363 | break; | |
2364 | } | |
2365 | ||
34e967a5 | 2366 | /* In case the dynamic symbols should be updated with a symbol. */ |
886a2506 NC |
2367 | if (h != NULL |
2368 | && (h->root.type == bfd_link_hash_defined | |
34e967a5 | 2369 | || h->root.type == bfd_link_hash_defweak)) |
886a2506 NC |
2370 | { |
2371 | asection *asec_ptr; | |
2372 | ||
2373 | internal_dyn.d_un.d_val = h->root.u.def.value; | |
2374 | asec_ptr = h->root.u.def.section; | |
2375 | if (asec_ptr->output_section != NULL) | |
2376 | { | |
2377 | internal_dyn.d_un.d_val += | |
2378 | (asec_ptr->output_section->vma + | |
2379 | asec_ptr->output_offset); | |
2380 | } | |
2381 | else | |
2382 | { | |
34e967a5 MC |
2383 | /* The symbol is imported from another shared |
2384 | library and does not apply to this one. */ | |
886a2506 NC |
2385 | internal_dyn.d_un.d_val = 0; |
2386 | } | |
2387 | do_it = TRUE; | |
2388 | } | |
2389 | else if (s != NULL) /* With a section information. */ | |
2390 | { | |
2391 | switch (internal_dyn.d_tag) | |
2392 | { | |
2393 | case DT_PLTGOT: | |
2394 | case DT_JMPREL: | |
34e967a5 MC |
2395 | case DT_VERSYM: |
2396 | case DT_VERDEF: | |
2397 | case DT_VERNEED: | |
886a2506 NC |
2398 | internal_dyn.d_un.d_ptr = s->vma; |
2399 | do_it = TRUE; | |
2400 | break; | |
2401 | ||
2402 | case DT_PLTRELSZ: | |
2403 | internal_dyn.d_un.d_val = s->size; | |
2404 | do_it = TRUE; | |
2405 | break; | |
2406 | ||
2407 | case DT_RELASZ: | |
34e967a5 MC |
2408 | if (s != NULL) |
2409 | internal_dyn.d_un.d_val -= s->size; | |
886a2506 NC |
2410 | do_it = TRUE; |
2411 | break; | |
2412 | ||
2413 | default: | |
2414 | break; | |
2415 | } | |
2416 | } | |
2417 | ||
2418 | if (do_it == TRUE) | |
2419 | bfd_elf32_swap_dyn_out (output_bfd, &internal_dyn, dyncon); | |
2420 | } | |
2421 | ||
34e967a5 | 2422 | if (htab->splt->size > 0) |
886a2506 | 2423 | { |
34e967a5 | 2424 | relocate_plt_for_entry (output_bfd, info); |
886a2506 NC |
2425 | } |
2426 | ||
34e967a5 MC |
2427 | /* TODO: Validate this. */ |
2428 | elf_section_data (htab->srelplt->output_section)->this_hdr.sh_entsize | |
2429 | = 0xc; | |
886a2506 NC |
2430 | } |
2431 | ||
2432 | /* Fill in the first three entries in the global offset table. */ | |
34e967a5 | 2433 | if (htab->sgot) |
886a2506 | 2434 | { |
34e967a5 | 2435 | if (htab->sgot->size > 0 || htab->sgotplt->size > 0) |
886a2506 NC |
2436 | { |
2437 | if (ds.sdyn == NULL) | |
2438 | bfd_put_32 (output_bfd, (bfd_vma) 0, | |
34e967a5 | 2439 | htab->sgotplt->contents); |
886a2506 NC |
2440 | else |
2441 | bfd_put_32 (output_bfd, | |
2442 | ds.sdyn->output_section->vma + ds.sdyn->output_offset, | |
34e967a5 MC |
2443 | htab->sgotplt->contents); |
2444 | bfd_put_32 (output_bfd, (bfd_vma) 0, htab->sgotplt->contents + 4); | |
2445 | bfd_put_32 (output_bfd, (bfd_vma) 0, htab->sgotplt->contents + 8); | |
886a2506 NC |
2446 | } |
2447 | } | |
2448 | ||
886a2506 NC |
2449 | return TRUE; |
2450 | } | |
2451 | ||
34e967a5 MC |
2452 | #define ADD_DYNAMIC_SYMBOL(NAME, TAG) \ |
2453 | h = elf_link_hash_lookup (elf_hash_table (info), \ | |
2454 | NAME, FALSE, FALSE, FALSE); \ | |
2455 | if ((h != NULL && (h->ref_regular || h->def_regular))) \ | |
2456 | if (! _bfd_elf_add_dynamic_entry (info, TAG, 0)) \ | |
886a2506 NC |
2457 | return FALSE; |
2458 | ||
2459 | /* Set the sizes of the dynamic sections. */ | |
2460 | static bfd_boolean | |
34e967a5 MC |
2461 | elf_arc_size_dynamic_sections (bfd * output_bfd, |
2462 | struct bfd_link_info *info) | |
886a2506 | 2463 | { |
34e967a5 | 2464 | bfd * dynobj; |
886a2506 | 2465 | asection * s; |
34e967a5 MC |
2466 | bfd_boolean relocs_exist = FALSE; |
2467 | bfd_boolean reltext_exist = FALSE; | |
886a2506 | 2468 | struct dynamic_sections ds = arc_create_dynamic_sections (output_bfd, info); |
34e967a5 | 2469 | struct elf_link_hash_table *htab = elf_hash_table (info); |
886a2506 NC |
2470 | |
2471 | dynobj = (elf_hash_table (info))->dynobj; | |
2472 | BFD_ASSERT (dynobj != NULL); | |
2473 | ||
2474 | if ((elf_hash_table (info))->dynamic_sections_created) | |
2475 | { | |
2476 | struct elf_link_hash_entry *h; | |
2477 | ||
34e967a5 MC |
2478 | /* Set the contents of the .interp section to the |
2479 | interpreter. */ | |
886a2506 NC |
2480 | if (!bfd_link_pic (info)) |
2481 | { | |
2482 | s = bfd_get_section_by_name (dynobj, ".interp"); | |
2483 | BFD_ASSERT (s != NULL); | |
34e967a5 | 2484 | s->size = sizeof (ELF_DYNAMIC_INTERPRETER); |
886a2506 NC |
2485 | s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER; |
2486 | } | |
2487 | ||
34e967a5 MC |
2488 | /* Add some entries to the .dynamic section. We fill in some of |
2489 | the values later, in elf_bfd_final_link, but we must add the | |
2490 | entries now so that we know the final size of the .dynamic | |
2491 | section. Checking if the .init section is present. We also | |
2492 | create DT_INIT and DT_FINI entries if the init_str has been | |
2493 | changed by the user. */ | |
886a2506 NC |
2494 | ADD_DYNAMIC_SYMBOL ("init", DT_INIT); |
2495 | ADD_DYNAMIC_SYMBOL ("fini", DT_FINI); | |
2496 | } | |
2497 | else | |
2498 | { | |
34e967a5 MC |
2499 | /* We may have created entries in the .rela.got section. |
2500 | However, if we are not creating the dynamic sections, we will | |
2501 | not actually use these entries. Reset the size of .rela.got, | |
2502 | which will cause it to get stripped from the output file | |
2503 | below. */ | |
2504 | if (htab->srelgot != NULL) | |
2505 | htab->srelgot->size = 0; | |
886a2506 NC |
2506 | } |
2507 | ||
34e967a5 MC |
2508 | if (htab->splt != NULL && htab->splt->size == 0) |
2509 | htab->splt->flags |= SEC_EXCLUDE; | |
886a2506 NC |
2510 | for (s = dynobj->sections; s != NULL; s = s->next) |
2511 | { | |
34e967a5 | 2512 | if ((s->flags & SEC_LINKER_CREATED) == 0) |
886a2506 NC |
2513 | continue; |
2514 | ||
34e967a5 | 2515 | if (strncmp (s->name, ".rela", 5) == 0) |
886a2506 | 2516 | { |
34e967a5 MC |
2517 | if (s->size == 0) |
2518 | { | |
2519 | s->flags |= SEC_EXCLUDE; | |
2520 | } | |
2521 | else | |
2522 | { | |
2523 | if (strcmp (s->name, ".rela.plt") != 0) | |
2524 | { | |
2525 | const char *outname = | |
2526 | bfd_get_section_name (output_bfd, | |
2527 | htab->srelplt->output_section); | |
2528 | ||
2529 | asection *target = bfd_get_section_by_name (output_bfd, | |
2530 | outname + 4); | |
2531 | ||
2532 | relocs_exist = TRUE; | |
2533 | if (target != NULL && target->size != 0 | |
2534 | && (target->flags & SEC_READONLY) != 0 | |
2535 | && (target->flags & SEC_ALLOC) != 0) | |
2536 | reltext_exist = TRUE; | |
2537 | } | |
2538 | } | |
886a2506 | 2539 | |
34e967a5 MC |
2540 | /* We use the reloc_count field as a counter if we need to |
2541 | copy relocs into the output file. */ | |
2542 | s->reloc_count = 0; | |
886a2506 | 2543 | } |
34e967a5 MC |
2544 | |
2545 | if (strcmp (s->name, ".dynamic") == 0) | |
2546 | continue; | |
2547 | ||
2548 | if (s->size != 0) | |
2549 | s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size); | |
2550 | ||
2551 | if (s->contents == NULL && s->size != 0) | |
2552 | return FALSE; | |
886a2506 NC |
2553 | } |
2554 | ||
2555 | if (ds.sdyn) | |
2556 | { | |
34e967a5 MC |
2557 | /* TODO: Check if this is needed. */ |
2558 | if (!bfd_link_pic (info)) | |
2559 | if (!_bfd_elf_add_dynamic_entry (info, DT_DEBUG, 0)) | |
2560 | return FALSE; | |
2561 | ||
2562 | if (htab->splt && (htab->splt->flags & SEC_EXCLUDE) == 0) | |
886a2506 NC |
2563 | if (!_bfd_elf_add_dynamic_entry (info, DT_PLTGOT, 0) |
2564 | || !_bfd_elf_add_dynamic_entry (info, DT_PLTRELSZ, 0) | |
2565 | || !_bfd_elf_add_dynamic_entry (info, DT_PLTREL, DT_RELA) | |
2566 | || !_bfd_elf_add_dynamic_entry (info, DT_JMPREL, 0) | |
2567 | ) | |
2568 | return FALSE; | |
2569 | ||
2570 | if (relocs_exist == TRUE) | |
2571 | if (!_bfd_elf_add_dynamic_entry (info, DT_RELA, 0) | |
2572 | || !_bfd_elf_add_dynamic_entry (info, DT_RELASZ, 0) | |
2573 | || !_bfd_elf_add_dynamic_entry (info, DT_RELENT, | |
2574 | sizeof (Elf32_External_Rela)) | |
2575 | ) | |
2576 | return FALSE; | |
2577 | ||
2578 | if (reltext_exist == TRUE) | |
2579 | if (!_bfd_elf_add_dynamic_entry (info, DT_TEXTREL, 0)) | |
2580 | return FALSE; | |
2581 | } | |
2582 | ||
2583 | return TRUE; | |
2584 | } | |
2585 | ||
34e967a5 MC |
2586 | const struct elf_size_info arc_elf32_size_info = |
2587 | { | |
2588 | sizeof (Elf32_External_Ehdr), | |
2589 | sizeof (Elf32_External_Phdr), | |
2590 | sizeof (Elf32_External_Shdr), | |
2591 | sizeof (Elf32_External_Rel), | |
2592 | sizeof (Elf32_External_Rela), | |
2593 | sizeof (Elf32_External_Sym), | |
2594 | sizeof (Elf32_External_Dyn), | |
2595 | sizeof (Elf_External_Note), | |
2596 | 4, | |
2597 | 1, | |
2598 | 32, 2, | |
2599 | ELFCLASS32, EV_CURRENT, | |
2600 | bfd_elf32_write_out_phdrs, | |
2601 | bfd_elf32_write_shdrs_and_ehdr, | |
2602 | bfd_elf32_checksum_contents, | |
2603 | bfd_elf32_write_relocs, | |
2604 | bfd_elf32_swap_symbol_in, | |
2605 | bfd_elf32_swap_symbol_out, | |
2606 | bfd_elf32_slurp_reloc_table, | |
2607 | bfd_elf32_slurp_symbol_table, | |
2608 | bfd_elf32_swap_dyn_in, | |
2609 | bfd_elf32_swap_dyn_out, | |
2610 | bfd_elf32_swap_reloc_in, | |
2611 | bfd_elf32_swap_reloc_out, | |
2612 | bfd_elf32_swap_reloca_in, | |
2613 | bfd_elf32_swap_reloca_out | |
2614 | }; | |
2615 | ||
2616 | #define elf_backend_size_info arc_elf32_size_info | |
2617 | ||
2618 | static struct bfd_link_hash_table * | |
2619 | arc_elf_link_hash_table_create (bfd *abfd) | |
2620 | { | |
2621 | struct elf_link_hash_table *htab; | |
2622 | ||
2623 | htab = bfd_zmalloc (sizeof (*htab)); | |
2624 | if (htab == NULL) | |
2625 | return NULL; | |
2626 | ||
2627 | if (!_bfd_elf_link_hash_table_init (htab, abfd, | |
2628 | _bfd_elf_link_hash_newfunc, | |
2629 | sizeof (struct elf_link_hash_entry), | |
2630 | GENERIC_ELF_DATA)) | |
2631 | { | |
2632 | free (htab); | |
2633 | return NULL; | |
2634 | } | |
2635 | ||
2636 | htab->init_got_refcount.refcount = 0; | |
2637 | htab->init_got_refcount.glist = NULL; | |
2638 | htab->init_got_offset.offset = 0; | |
2639 | htab->init_got_offset.glist = NULL; | |
2640 | return (struct bfd_link_hash_table *) htab; | |
2641 | } | |
2642 | ||
2643 | /* Hook called by the linker routine which adds symbols from an object | |
2644 | file. */ | |
2645 | ||
2646 | static bfd_boolean | |
2647 | elf_arc_add_symbol_hook (bfd * abfd, | |
2648 | struct bfd_link_info * info, | |
2649 | Elf_Internal_Sym * sym, | |
2650 | const char ** namep ATTRIBUTE_UNUSED, | |
2651 | flagword * flagsp ATTRIBUTE_UNUSED, | |
2652 | asection ** secp ATTRIBUTE_UNUSED, | |
2653 | bfd_vma * valp ATTRIBUTE_UNUSED) | |
2654 | { | |
2655 | if ((ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC | |
2656 | || ELF_ST_BIND (sym->st_info) == STB_GNU_UNIQUE) | |
2657 | && (abfd->flags & DYNAMIC) == 0 | |
2658 | && bfd_get_flavour (info->output_bfd) == bfd_target_elf_flavour) | |
2659 | elf_tdata (info->output_bfd)->has_gnu_symbols = elf_gnu_symbol_any; | |
2660 | ||
2661 | return TRUE; | |
2662 | } | |
886a2506 | 2663 | |
6d00b590 | 2664 | #define TARGET_LITTLE_SYM arc_elf32_le_vec |
47b0e7ad | 2665 | #define TARGET_LITTLE_NAME "elf32-littlearc" |
886a2506 NC |
2666 | #define TARGET_BIG_SYM arc_elf32_be_vec |
2667 | #define TARGET_BIG_NAME "elf32-bigarc" | |
2668 | #define ELF_ARCH bfd_arch_arc | |
2669 | #define ELF_MACHINE_CODE EM_ARC_COMPACT | |
2670 | #define ELF_MACHINE_ALT1 EM_ARC_COMPACT2 | |
2671 | #define ELF_MAXPAGESIZE 0x2000 | |
2672 | ||
34e967a5 MC |
2673 | #define bfd_elf32_bfd_link_hash_table_create arc_elf_link_hash_table_create |
2674 | ||
2675 | #define bfd_elf32_bfd_merge_private_bfd_data arc_elf_merge_private_bfd_data | |
2676 | #define bfd_elf32_bfd_reloc_type_lookup arc_elf32_bfd_reloc_type_lookup | |
2677 | #define bfd_elf32_bfd_set_private_flags arc_elf_set_private_flags | |
2678 | #define bfd_elf32_bfd_print_private_bfd_data arc_elf_print_private_bfd_data | |
2679 | #define bfd_elf32_bfd_copy_private_bfd_data arc_elf_copy_private_bfd_data | |
2680 | ||
886a2506 NC |
2681 | #define elf_info_to_howto_rel arc_info_to_howto_rel |
2682 | #define elf_backend_object_p arc_elf_object_p | |
2683 | #define elf_backend_final_write_processing arc_elf_final_write_processing | |
2684 | ||
2685 | #define elf_backend_relocate_section elf_arc_relocate_section | |
2686 | #define elf_backend_check_relocs elf_arc_check_relocs | |
2687 | #define elf_backend_create_dynamic_sections _bfd_elf_create_dynamic_sections | |
2688 | ||
2689 | #define elf_backend_adjust_dynamic_symbol elf_arc_adjust_dynamic_symbol | |
2690 | #define elf_backend_finish_dynamic_symbol elf_arc_finish_dynamic_symbol | |
2691 | ||
2692 | #define elf_backend_finish_dynamic_sections elf_arc_finish_dynamic_sections | |
2693 | #define elf_backend_size_dynamic_sections elf_arc_size_dynamic_sections | |
34e967a5 | 2694 | #define elf_backend_add_symbol_hook elf_arc_add_symbol_hook |
886a2506 NC |
2695 | |
2696 | #define elf_backend_can_gc_sections 1 | |
2697 | #define elf_backend_want_got_plt 1 | |
2698 | #define elf_backend_plt_readonly 1 | |
34e967a5 | 2699 | #define elf_backend_rela_plts_and_copies_p 1 |
886a2506 NC |
2700 | #define elf_backend_want_plt_sym 0 |
2701 | #define elf_backend_got_header_size 12 | |
2702 | ||
2703 | #define elf_backend_may_use_rel_p 0 | |
2704 | #define elf_backend_may_use_rela_p 1 | |
2705 | #define elf_backend_default_use_rela_p 1 | |
252b5132 RH |
2706 | |
2707 | #include "elf32-target.h" |