Commit | Line | Data |
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252b5132 | 1 | /* ARC-specific support for 32-bit ELF |
6f2750fe | 2 | Copyright (C) 1994-2016 Free Software Foundation, Inc. |
886a2506 | 3 | Contributed by Cupertino Miranda (cmiranda@synopsys.com). |
252b5132 | 4 | |
0d2bcfaf | 5 | This file is part of BFD, the Binary File Descriptor library. |
252b5132 | 6 | |
0d2bcfaf NC |
7 | This program is free software; you can redistribute it and/or modify |
8 | it under the terms of the GNU General Public License as published by | |
cd123cb7 | 9 | the Free Software Foundation; either version 3 of the License, or |
0d2bcfaf | 10 | (at your option) any later version. |
252b5132 | 11 | |
0d2bcfaf NC |
12 | This program is distributed in the hope that it will be useful, |
13 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | GNU General Public License for more details. | |
252b5132 | 16 | |
0d2bcfaf NC |
17 | You should have received a copy of the GNU General Public License |
18 | along with this program; if not, write to the Free Software | |
47b0e7ad NC |
19 | Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, |
20 | MA 02110-1301, USA. */ | |
252b5132 | 21 | |
252b5132 | 22 | #include "sysdep.h" |
3db64b00 | 23 | #include "bfd.h" |
252b5132 RH |
24 | #include "libbfd.h" |
25 | #include "elf-bfd.h" | |
26 | #include "elf/arc.h" | |
ea04a8f6 | 27 | #include "libiberty.h" |
886a2506 | 28 | #include "opcode/arc-func.h" |
4b0c052e | 29 | #include "opcode/arc.h" |
34e967a5 | 30 | #include "arc-plt.h" |
886a2506 | 31 | |
34e967a5 MC |
32 | #ifdef DEBUG |
33 | # define PR_DEBUG(fmt, args...) fprintf (stderr, fmt, ##args) | |
34 | #else | |
35 | # define PR_DEBUG(fmt, args...) | |
36 | #endif | |
37 | ||
38 | /* #define ARC_ENABLE_DEBUG 1 */ | |
39 | #ifndef ARC_ENABLE_DEBUG | |
886a2506 | 40 | #define ARC_DEBUG(...) |
34e967a5 MC |
41 | #else |
42 | static char * | |
43 | name_for_global_symbol (struct elf_link_hash_entry *h) | |
44 | { | |
45 | static char *local_str = "(local)"; | |
46 | if (h == NULL) | |
47 | return local_str; | |
48 | else | |
49 | return h->root.root.string; | |
50 | } | |
51 | #define ARC_DEBUG(args...) fprintf (stderr, ##args) | |
52 | #endif | |
53 | ||
54 | ||
55 | #define ADD_RELA(BFD, SECTION, OFFSET, SYM_IDX, TYPE, ADDEND) \ | |
56 | { \ | |
57 | struct elf_link_hash_table *_htab = elf_hash_table (info); \ | |
58 | Elf_Internal_Rela _rel; \ | |
23a42089 | 59 | bfd_byte * _loc; \ |
34e967a5 | 60 | \ |
23a42089 | 61 | _loc = _htab->srel##SECTION->contents \ |
34e967a5 MC |
62 | + ((_htab->srel##SECTION->reloc_count) \ |
63 | * sizeof (Elf32_External_Rela)); \ | |
64 | _htab->srel##SECTION->reloc_count++; \ | |
65 | _rel.r_addend = ADDEND; \ | |
66 | _rel.r_offset = (_htab->s##SECTION)->output_section->vma \ | |
67 | + (_htab->s##SECTION)->output_offset + OFFSET; \ | |
94e5c971 | 68 | BFD_ASSERT ((long) SYM_IDX != -1); \ |
34e967a5 | 69 | _rel.r_info = ELF32_R_INFO (SYM_IDX, TYPE); \ |
23a42089 | 70 | bfd_elf32_swap_reloca_out (BFD, &_rel, _loc); \ |
34e967a5 | 71 | } |
886a2506 | 72 | |
886a2506 NC |
73 | struct dynamic_sections |
74 | { | |
75 | bfd_boolean initialized; | |
76 | asection * sgot; | |
77 | asection * srelgot; | |
78 | asection * sgotplt; | |
34e967a5 | 79 | asection * srelgotplt; |
886a2506 NC |
80 | asection * sdyn; |
81 | asection * splt; | |
82 | asection * srelplt; | |
83 | }; | |
84 | ||
886a2506 NC |
85 | enum dyn_section_types |
86 | { | |
87 | got = 0, | |
88 | relgot, | |
89 | gotplt, | |
90 | dyn, | |
91 | plt, | |
92 | relplt, | |
93 | DYN_SECTION_TYPES_END | |
94 | }; | |
95 | ||
96 | const char * dyn_section_names[DYN_SECTION_TYPES_END] = | |
97 | { | |
98 | ".got", | |
99 | ".rela.got", | |
100 | ".got.plt", | |
101 | ".dynamic", | |
102 | ".plt", | |
103 | ".rela.plt" | |
104 | }; | |
105 | ||
34e967a5 MC |
106 | enum tls_type_e |
107 | { | |
108 | GOT_UNKNOWN = 0, | |
109 | GOT_NORMAL, | |
110 | GOT_TLS_GD, | |
111 | GOT_TLS_IE, | |
112 | GOT_TLS_LE | |
113 | }; | |
114 | ||
115 | enum tls_got_entries | |
116 | { | |
33cbe6c0 AB |
117 | TLS_GOT_NONE = 0, |
118 | TLS_GOT_MOD, | |
119 | TLS_GOT_OFF, | |
120 | TLS_GOT_MOD_AND_OFF | |
34e967a5 MC |
121 | }; |
122 | ||
123 | struct got_entry | |
124 | { | |
125 | struct got_entry *next; | |
126 | enum tls_type_e type; | |
127 | bfd_vma offset; | |
128 | bfd_boolean processed; | |
129 | bfd_boolean created_dyn_relocation; | |
130 | enum tls_got_entries existing_entries; | |
131 | }; | |
132 | ||
133 | static void | |
134 | new_got_entry_to_list (struct got_entry **list, | |
135 | enum tls_type_e type, | |
136 | bfd_vma offset, | |
137 | enum tls_got_entries existing_entries) | |
138 | { | |
139 | /* Find list end. Avoid having multiple entries of the same | |
140 | type. */ | |
141 | struct got_entry **p = list; | |
142 | while (*p != NULL) | |
143 | { | |
144 | if ((*p)->type == type) | |
145 | return; | |
146 | p = &((*p)->next); | |
147 | } | |
148 | ||
149 | struct got_entry *entry = | |
150 | (struct got_entry *) malloc (sizeof(struct got_entry)); | |
151 | ||
152 | entry->type = type; | |
153 | entry->offset = offset; | |
154 | entry->next = NULL; | |
155 | entry->processed = FALSE; | |
156 | entry->created_dyn_relocation = FALSE; | |
157 | entry->existing_entries = existing_entries; | |
158 | ||
159 | /* Add the entry to the end of the list. */ | |
160 | *p = entry; | |
161 | } | |
162 | ||
163 | static bfd_boolean | |
164 | symbol_has_entry_of_type (struct got_entry *list, enum tls_type_e type) | |
165 | { | |
166 | while (list != NULL) | |
167 | { | |
168 | if (list->type == type) | |
169 | return TRUE; | |
170 | list = list->next; | |
171 | } | |
172 | ||
173 | return FALSE; | |
174 | } | |
175 | ||
886a2506 NC |
176 | /* The default symbols representing the init and fini dyn values. |
177 | TODO: Check what is the relation of those strings with arclinux.em | |
178 | and DT_INIT. */ | |
179 | #define INIT_SYM_STRING "_init" | |
180 | #define FINI_SYM_STRING "_fini" | |
181 | ||
182 | char * init_str = INIT_SYM_STRING; | |
183 | char * fini_str = FINI_SYM_STRING; | |
184 | ||
886a2506 NC |
185 | #define ARC_RELOC_HOWTO(TYPE, VALUE, SIZE, BITSIZE, RELOC_FUNCTION, OVERFLOW, FORMULA) \ |
186 | case VALUE: \ | |
b05a65d0 | 187 | return "R_" #TYPE; \ |
886a2506 NC |
188 | break; |
189 | ||
190 | static ATTRIBUTE_UNUSED const char * | |
191 | reloc_type_to_name (unsigned int type) | |
192 | { | |
193 | switch (type) | |
194 | { | |
195 | #include "elf/arc-reloc.def" | |
196 | ||
197 | default: | |
198 | return "UNKNOWN"; | |
199 | break; | |
200 | } | |
201 | } | |
202 | #undef ARC_RELOC_HOWTO | |
252b5132 | 203 | |
252b5132 RH |
204 | /* Try to minimize the amount of space occupied by relocation tables |
205 | on the ROM (not that the ROM won't be swamped by other ELF overhead). */ | |
0d2bcfaf | 206 | |
886a2506 NC |
207 | #define USE_REL 1 |
208 | ||
209 | static ATTRIBUTE_UNUSED bfd_boolean | |
210 | is_reloc_PC_relative (reloc_howto_type *howto) | |
211 | { | |
212 | return (strstr (howto->name, "PC") != NULL) ? TRUE : FALSE; | |
213 | } | |
214 | ||
215 | static bfd_boolean | |
216 | is_reloc_SDA_relative (reloc_howto_type *howto) | |
217 | { | |
218 | return (strstr (howto->name, "SDA") != NULL) ? TRUE : FALSE; | |
219 | } | |
220 | ||
221 | static bfd_boolean | |
222 | is_reloc_for_GOT (reloc_howto_type * howto) | |
223 | { | |
34e967a5 MC |
224 | if (strstr (howto->name, "TLS") != NULL) |
225 | return FALSE; | |
886a2506 NC |
226 | return (strstr (howto->name, "GOT") != NULL) ? TRUE : FALSE; |
227 | } | |
228 | ||
229 | static bfd_boolean | |
230 | is_reloc_for_PLT (reloc_howto_type * howto) | |
231 | { | |
232 | return (strstr (howto->name, "PLT") != NULL) ? TRUE : FALSE; | |
233 | } | |
234 | ||
34e967a5 MC |
235 | static bfd_boolean |
236 | is_reloc_for_TLS (reloc_howto_type *howto) | |
237 | { | |
238 | return (strstr (howto->name, "TLS") != NULL) ? TRUE : FALSE; | |
239 | } | |
240 | ||
886a2506 NC |
241 | #define arc_bfd_get_8(A,B,C) bfd_get_8(A,B) |
242 | #define arc_bfd_get_16(A,B,C) bfd_get_16(A,B) | |
72f3b6aa | 243 | #define arc_bfd_get_32(A,B,C) bfd_get_32(A,B) |
886a2506 NC |
244 | #define arc_bfd_put_8(A,B,C,D) bfd_put_8(A,B,C) |
245 | #define arc_bfd_put_16(A,B,C,D) bfd_put_16(A,B,C) | |
72f3b6aa | 246 | #define arc_bfd_put_32(A,B,C,D) bfd_put_32(A,B,C) |
886a2506 | 247 | |
252b5132 | 248 | |
47b0e7ad | 249 | static bfd_reloc_status_type |
886a2506 NC |
250 | arc_elf_reloc (bfd *abfd ATTRIBUTE_UNUSED, |
251 | arelent *reloc_entry, | |
252 | asymbol *symbol_in, | |
253 | void *data ATTRIBUTE_UNUSED, | |
254 | asection *input_section, | |
255 | bfd *output_bfd, | |
256 | char ** error_message ATTRIBUTE_UNUSED) | |
257 | { | |
258 | if (output_bfd != NULL) | |
259 | { | |
260 | reloc_entry->address += input_section->output_offset; | |
261 | ||
262 | /* In case of relocateable link and if the reloc is against a | |
263 | section symbol, the addend needs to be adjusted according to | |
264 | where the section symbol winds up in the output section. */ | |
265 | if ((symbol_in->flags & BSF_SECTION_SYM) && symbol_in->section) | |
266 | reloc_entry->addend += symbol_in->section->output_offset; | |
267 | ||
268 | return bfd_reloc_ok; | |
269 | } | |
270 | ||
271 | return bfd_reloc_continue; | |
272 | } | |
273 | ||
274 | ||
275 | #define ARC_RELOC_HOWTO(TYPE, VALUE, SIZE, BITSIZE, RELOC_FUNCTION, OVERFLOW, FORMULA) \ | |
276 | TYPE = VALUE, | |
277 | enum howto_list | |
278 | { | |
279 | #include "elf/arc-reloc.def" | |
280 | HOWTO_LIST_LAST | |
281 | }; | |
282 | #undef ARC_RELOC_HOWTO | |
283 | ||
284 | #define ARC_RELOC_HOWTO(TYPE, VALUE, RSIZE, BITSIZE, RELOC_FUNCTION, OVERFLOW, FORMULA) \ | |
b05a65d0 | 285 | [TYPE] = HOWTO (R_##TYPE, 0, RSIZE, BITSIZE, FALSE, 0, complain_overflow_##OVERFLOW, arc_elf_reloc, "R_" #TYPE, FALSE, 0, 0, FALSE), |
886a2506 NC |
286 | |
287 | static struct reloc_howto_struct elf_arc_howto_table[] = | |
288 | { | |
289 | #include "elf/arc-reloc.def" | |
34e967a5 MC |
290 | /* Example of what is generated by the preprocessor. Currently kept as an |
291 | example. | |
886a2506 NC |
292 | HOWTO (R_ARC_NONE, // Type. |
293 | 0, // Rightshift. | |
294 | 2, // Size (0 = byte, 1 = short, 2 = long). | |
295 | 32, // Bitsize. | |
296 | FALSE, // PC_relative. | |
297 | 0, // Bitpos. | |
298 | complain_overflow_bitfield, // Complain_on_overflow. | |
299 | bfd_elf_generic_reloc, // Special_function. | |
300 | "R_ARC_NONE", // Name. | |
301 | TRUE, // Partial_inplace. | |
302 | 0, // Src_mask. | |
303 | 0, // Dst_mask. | |
304 | FALSE), // PCrel_offset. | |
305 | */ | |
306 | }; | |
307 | #undef ARC_RELOC_HOWTO | |
308 | ||
309 | static void arc_elf_howto_init (void) | |
310 | { | |
311 | #define ARC_RELOC_HOWTO(TYPE, VALUE, SIZE, BITSIZE, RELOC_FUNCTION, OVERFLOW, FORMULA) \ | |
6f4b1afc | 312 | elf_arc_howto_table[TYPE].pc_relative = \ |
0a5ff21b | 313 | (strstr (#FORMULA, " P ") != NULL || strstr (#FORMULA, " PDATA ") != NULL); \ |
72f3b6aa CZ |
314 | elf_arc_howto_table[TYPE].dst_mask = RELOC_FUNCTION(0, ~0); \ |
315 | /* Only 32 bit data relocations should be marked as ME. */ \ | |
316 | if (strstr (#FORMULA, " ME ") != NULL) \ | |
317 | { \ | |
318 | BFD_ASSERT (SIZE == 2); \ | |
319 | } | |
886a2506 | 320 | |
34e967a5 | 321 | #include "elf/arc-reloc.def" |
72f3b6aa | 322 | |
47b0e7ad | 323 | } |
886a2506 | 324 | #undef ARC_RELOC_HOWTO |
47b0e7ad | 325 | |
886a2506 NC |
326 | |
327 | #define ARC_RELOC_HOWTO(TYPE, VALUE, SIZE, BITSIZE, RELOC_FUNCTION, OVERFLOW, FORMULA) \ | |
328 | [TYPE] = VALUE, | |
329 | const int howto_table_lookup[] = | |
330 | { | |
34e967a5 | 331 | #include "elf/arc-reloc.def" |
252b5132 | 332 | }; |
886a2506 NC |
333 | #undef ARC_RELOC_HOWTO |
334 | ||
f26dd308 AM |
335 | static reloc_howto_type * |
336 | arc_elf_howto (unsigned int r_type) | |
337 | { | |
338 | if (elf_arc_howto_table[R_ARC_32].dst_mask == 0) | |
339 | arc_elf_howto_init (); | |
340 | return &elf_arc_howto_table[r_type]; | |
341 | } | |
252b5132 RH |
342 | |
343 | /* Map BFD reloc types to ARC ELF reloc types. */ | |
344 | ||
345 | struct arc_reloc_map | |
346 | { | |
34e967a5 MC |
347 | bfd_reloc_code_real_type bfd_reloc_val; |
348 | unsigned char elf_reloc_val; | |
252b5132 RH |
349 | }; |
350 | ||
886a2506 NC |
351 | #define ARC_RELOC_HOWTO(TYPE, VALUE, SIZE, BITSIZE, RELOC_FUNCTION, OVERFLOW, FORMULA) \ |
352 | { BFD_RELOC_##TYPE, R_##TYPE }, | |
252b5132 RH |
353 | static const struct arc_reloc_map arc_reloc_map[] = |
354 | { | |
34e967a5 MC |
355 | #include "elf/arc-reloc.def" |
356 | ||
886a2506 NC |
357 | {BFD_RELOC_NONE, R_ARC_NONE}, |
358 | {BFD_RELOC_8, R_ARC_8}, | |
359 | {BFD_RELOC_16, R_ARC_16}, | |
360 | {BFD_RELOC_24, R_ARC_24}, | |
361 | {BFD_RELOC_32, R_ARC_32}, | |
252b5132 | 362 | }; |
886a2506 | 363 | #undef ARC_RELOC_HOWTO |
252b5132 | 364 | |
094fb063 CZ |
365 | typedef ATTRIBUTE_UNUSED bfd_vma (*replace_func) (unsigned, int ATTRIBUTE_UNUSED); |
366 | ||
367 | #define ARC_RELOC_HOWTO(TYPE, VALUE, SIZE, BITSIZE, RELOC_FUNCTION, OVERFLOW, FORMULA) \ | |
368 | case TYPE: \ | |
369 | func = (void *) RELOC_FUNCTION; \ | |
370 | break; | |
371 | static replace_func | |
372 | get_replace_function (bfd *abfd, unsigned int r_type) | |
373 | { | |
374 | void *func = NULL; | |
375 | ||
376 | switch (r_type) | |
377 | { | |
378 | #include "elf/arc-reloc.def" | |
379 | } | |
380 | ||
381 | if (func == replace_bits24 && bfd_big_endian (abfd)) | |
382 | return (replace_func) replace_bits24_be; | |
383 | ||
384 | return (replace_func) func; | |
385 | } | |
386 | #undef ARC_RELOC_HOWTO | |
387 | ||
252b5132 | 388 | static reloc_howto_type * |
34e967a5 | 389 | arc_elf32_bfd_reloc_type_lookup (bfd * abfd ATTRIBUTE_UNUSED, |
47b0e7ad | 390 | bfd_reloc_code_real_type code) |
252b5132 RH |
391 | { |
392 | unsigned int i; | |
393 | ||
ea04a8f6 | 394 | for (i = ARRAY_SIZE (arc_reloc_map); i--;) |
886a2506 NC |
395 | { |
396 | if (arc_reloc_map[i].bfd_reloc_val == code) | |
f26dd308 | 397 | return arc_elf_howto (arc_reloc_map[i].elf_reloc_val); |
886a2506 | 398 | } |
ea04a8f6 | 399 | |
252b5132 RH |
400 | return NULL; |
401 | } | |
402 | ||
34e967a5 MC |
403 | /* Function to set the ELF flag bits. */ |
404 | static bfd_boolean | |
405 | arc_elf_set_private_flags (bfd *abfd, flagword flags) | |
406 | { | |
407 | elf_elfheader (abfd)->e_flags = flags; | |
408 | elf_flags_init (abfd) = TRUE; | |
409 | return TRUE; | |
410 | } | |
411 | ||
412 | /* Print private flags. */ | |
413 | static bfd_boolean | |
414 | arc_elf_print_private_bfd_data (bfd *abfd, void * ptr) | |
415 | { | |
416 | FILE *file = (FILE *) ptr; | |
417 | flagword flags; | |
418 | ||
419 | BFD_ASSERT (abfd != NULL && ptr != NULL); | |
420 | ||
421 | /* Print normal ELF private data. */ | |
422 | _bfd_elf_print_private_bfd_data (abfd, ptr); | |
423 | ||
424 | flags = elf_elfheader (abfd)->e_flags; | |
425 | fprintf (file, _("private flags = 0x%lx:"), (unsigned long) flags); | |
426 | ||
427 | switch (flags & EF_ARC_MACH_MSK) | |
428 | { | |
34e967a5 MC |
429 | case EF_ARC_CPU_ARCV2HS : fprintf (file, " -mcpu=ARCv2HS"); break; |
430 | case EF_ARC_CPU_ARCV2EM : fprintf (file, " -mcpu=ARCv2EM"); break; | |
431 | case E_ARC_MACH_ARC600 : fprintf (file, " -mcpu=ARC600"); break; | |
432 | case E_ARC_MACH_ARC601 : fprintf (file, " -mcpu=ARC601"); break; | |
433 | case E_ARC_MACH_ARC700 : fprintf (file, " -mcpu=ARC700"); break; | |
434 | default: | |
435 | fprintf (file, "-mcpu=unknown"); | |
436 | break; | |
437 | } | |
438 | ||
439 | switch (flags & EF_ARC_OSABI_MSK) | |
440 | { | |
441 | case E_ARC_OSABI_ORIG : fprintf (file, " (ABI:legacy)"); break; | |
442 | case E_ARC_OSABI_V2 : fprintf (file, " (ABI:v2)"); break; | |
443 | case E_ARC_OSABI_V3 : fprintf (file, " (ABI:v3)"); break; | |
444 | default: | |
445 | fprintf (file, "(ABI:unknown)"); | |
446 | break; | |
447 | } | |
448 | ||
449 | fputc ('\n', file); | |
450 | return TRUE; | |
451 | } | |
452 | ||
453 | /* Copy backend specific data from one object module to another. */ | |
454 | ||
455 | static bfd_boolean | |
456 | arc_elf_copy_private_bfd_data (bfd *ibfd, bfd *obfd) | |
457 | { | |
458 | if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour | |
459 | || bfd_get_flavour (obfd) != bfd_target_elf_flavour) | |
460 | return TRUE; | |
461 | ||
462 | BFD_ASSERT (!elf_flags_init (obfd) | |
463 | || elf_elfheader (obfd)->e_flags == elf_elfheader (ibfd)->e_flags); | |
464 | ||
465 | elf_elfheader (obfd)->e_flags = elf_elfheader (ibfd)->e_flags; | |
466 | elf_flags_init (obfd) = TRUE; | |
467 | ||
468 | /* Copy object attributes. */ | |
469 | _bfd_elf_copy_obj_attributes (ibfd, obfd); | |
470 | ||
471 | return _bfd_elf_copy_private_bfd_data (ibfd, obfd); | |
472 | } | |
473 | ||
157090f7 | 474 | static reloc_howto_type * |
34e967a5 MC |
475 | bfd_elf32_bfd_reloc_name_lookup (bfd * abfd ATTRIBUTE_UNUSED, |
476 | const char *r_name) | |
157090f7 AM |
477 | { |
478 | unsigned int i; | |
479 | ||
886a2506 | 480 | for (i = 0; i < ARRAY_SIZE (elf_arc_howto_table); i++) |
157090f7 AM |
481 | if (elf_arc_howto_table[i].name != NULL |
482 | && strcasecmp (elf_arc_howto_table[i].name, r_name) == 0) | |
f26dd308 | 483 | return arc_elf_howto (i); |
157090f7 AM |
484 | |
485 | return NULL; | |
486 | } | |
487 | ||
886a2506 | 488 | /* Set the howto pointer for an ARC ELF reloc. */ |
34e967a5 | 489 | |
252b5132 | 490 | static void |
886a2506 NC |
491 | arc_info_to_howto_rel (bfd * abfd ATTRIBUTE_UNUSED, |
492 | arelent * cache_ptr, | |
493 | Elf_Internal_Rela * dst) | |
252b5132 RH |
494 | { |
495 | unsigned int r_type; | |
496 | ||
497 | r_type = ELF32_R_TYPE (dst->r_info); | |
886a2506 | 498 | BFD_ASSERT (r_type < (unsigned int) R_ARC_max); |
f26dd308 | 499 | cache_ptr->howto = arc_elf_howto (r_type); |
252b5132 RH |
500 | } |
501 | ||
34e967a5 MC |
502 | /* Merge backend specific data from an object file to the output |
503 | object file when linking. */ | |
504 | ||
505 | static bfd_boolean | |
506 | arc_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd) | |
507 | { | |
508 | unsigned short mach_ibfd; | |
509 | static unsigned short mach_obfd = EM_NONE; | |
510 | flagword out_flags; | |
511 | flagword in_flags; | |
512 | asection *sec; | |
513 | ||
514 | /* Check if we have the same endianess. */ | |
515 | if (! _bfd_generic_verify_endian_match (ibfd, obfd)) | |
516 | { | |
517 | _bfd_error_handler (_("ERROR: Endian Match failed. Attempting to link " | |
518 | "%B with binary %s of opposite endian-ness"), | |
519 | ibfd, bfd_get_filename (obfd)); | |
520 | return FALSE; | |
521 | } | |
522 | ||
523 | /* Collect ELF flags. */ | |
524 | in_flags = elf_elfheader (ibfd)->e_flags & EF_ARC_MACH_MSK; | |
525 | out_flags = elf_elfheader (obfd)->e_flags & EF_ARC_MACH_MSK; | |
526 | ||
527 | if (!elf_flags_init (obfd)) /* First call, no flags set. */ | |
528 | { | |
529 | elf_flags_init (obfd) = TRUE; | |
530 | out_flags = in_flags; | |
531 | } | |
532 | ||
533 | if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour | |
534 | || bfd_get_flavour (obfd) != bfd_target_elf_flavour) | |
535 | return TRUE; | |
536 | ||
537 | /* Check to see if the input BFD actually contains any sections. Do | |
538 | not short-circuit dynamic objects; their section list may be | |
539 | emptied by elf_link_add_object_symbols. */ | |
540 | if (!(ibfd->flags & DYNAMIC)) | |
541 | { | |
542 | bfd_boolean null_input_bfd = TRUE; | |
543 | bfd_boolean only_data_sections = TRUE; | |
544 | ||
545 | for (sec = ibfd->sections; sec != NULL; sec = sec->next) | |
546 | { | |
547 | if ((bfd_get_section_flags (ibfd, sec) | |
548 | & (SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS)) | |
549 | == (SEC_LOAD | SEC_CODE | SEC_HAS_CONTENTS)) | |
550 | only_data_sections = FALSE; | |
551 | ||
552 | null_input_bfd = FALSE; | |
553 | } | |
554 | ||
555 | if (null_input_bfd || only_data_sections) | |
556 | return TRUE; | |
557 | } | |
558 | ||
559 | /* Complain about various flag/architecture mismatches. */ | |
560 | mach_ibfd = elf_elfheader (ibfd)->e_machine; | |
561 | if (mach_obfd == EM_NONE) | |
562 | { | |
563 | mach_obfd = mach_ibfd; | |
564 | } | |
565 | else | |
566 | { | |
567 | if (mach_ibfd != mach_obfd) | |
568 | { | |
569 | _bfd_error_handler (_("ERROR: Attempting to link %B " | |
570 | "with a binary %s of different architecture"), | |
571 | ibfd, bfd_get_filename (obfd)); | |
572 | return FALSE; | |
573 | } | |
574 | else if (in_flags != out_flags) | |
575 | { | |
576 | /* Warn if different flags. */ | |
577 | (*_bfd_error_handler) | |
578 | (_("%s: uses different e_flags (0x%lx) fields than " | |
579 | "previous modules (0x%lx)"), | |
580 | bfd_get_filename (ibfd), (long)in_flags, (long)out_flags); | |
581 | if (in_flags && out_flags) | |
582 | return FALSE; | |
583 | /* MWDT doesnt set the eflags hence make sure we choose the | |
584 | eflags set by gcc. */ | |
585 | in_flags = in_flags > out_flags ? in_flags : out_flags; | |
586 | } | |
587 | } | |
588 | ||
589 | /* Update the flags. */ | |
590 | elf_elfheader (obfd)->e_flags = in_flags; | |
591 | ||
592 | if (bfd_get_mach (obfd) < bfd_get_mach (ibfd)) | |
593 | { | |
594 | return bfd_set_arch_mach (obfd, bfd_arch_arc, bfd_get_mach (ibfd)); | |
595 | } | |
596 | ||
597 | return TRUE; | |
598 | } | |
599 | ||
252b5132 | 600 | /* Set the right machine number for an ARC ELF file. */ |
b34976b6 | 601 | static bfd_boolean |
886a2506 | 602 | arc_elf_object_p (bfd * abfd) |
252b5132 | 603 | { |
886a2506 NC |
604 | /* Make sure this is initialised, or you'll have the potential of passing |
605 | garbage---or misleading values---into the call to | |
606 | bfd_default_set_arch_mach (). */ | |
607 | int mach = bfd_mach_arc_arc700; | |
608 | unsigned long arch = elf_elfheader (abfd)->e_flags & EF_ARC_MACH_MSK; | |
609 | unsigned e_machine = elf_elfheader (abfd)->e_machine; | |
252b5132 | 610 | |
886a2506 | 611 | if (e_machine == EM_ARC_COMPACT || e_machine == EM_ARC_COMPACT2) |
252b5132 | 612 | { |
0d2bcfaf NC |
613 | switch (arch) |
614 | { | |
886a2506 NC |
615 | case E_ARC_MACH_ARC600: |
616 | mach = bfd_mach_arc_arc600; | |
617 | break; | |
618 | case E_ARC_MACH_ARC601: | |
619 | mach = bfd_mach_arc_arc601; | |
620 | break; | |
621 | case E_ARC_MACH_ARC700: | |
622 | mach = bfd_mach_arc_arc700; | |
623 | break; | |
8699fc3e AB |
624 | case E_ARC_MACH_NPS400: |
625 | mach = bfd_mach_arc_nps400; | |
626 | break; | |
886a2506 NC |
627 | case EF_ARC_CPU_ARCV2HS: |
628 | case EF_ARC_CPU_ARCV2EM: | |
629 | mach = bfd_mach_arc_arcv2; | |
630 | break; | |
631 | default: | |
632 | mach = (e_machine == EM_ARC_COMPACT) ? | |
633 | bfd_mach_arc_arc700 : bfd_mach_arc_arcv2; | |
634 | break; | |
635 | } | |
636 | } | |
637 | else | |
638 | { | |
639 | if (e_machine == EM_ARC) | |
640 | { | |
641 | (*_bfd_error_handler) | |
642 | (_("Error: The ARC4 architecture is no longer supported.\n")); | |
643 | return FALSE; | |
644 | } | |
645 | else | |
646 | { | |
647 | (*_bfd_error_handler) | |
648 | (_("Warning: unset or old architecture flags. \n" | |
649 | " Use default machine.\n")); | |
0d2bcfaf | 650 | } |
252b5132 | 651 | } |
886a2506 | 652 | |
0d2bcfaf | 653 | return bfd_default_set_arch_mach (abfd, bfd_arch_arc, mach); |
252b5132 RH |
654 | } |
655 | ||
656 | /* The final processing done just before writing out an ARC ELF object file. | |
657 | This gets the ARC architecture right based on the machine number. */ | |
658 | ||
659 | static void | |
34e967a5 MC |
660 | arc_elf_final_write_processing (bfd * abfd, |
661 | bfd_boolean linker ATTRIBUTE_UNUSED) | |
252b5132 | 662 | { |
886a2506 | 663 | unsigned long emf; |
252b5132 | 664 | |
0d2bcfaf | 665 | switch (bfd_get_mach (abfd)) |
252b5132 | 666 | { |
886a2506 | 667 | case bfd_mach_arc_arc600: |
886a2506 | 668 | emf = EM_ARC_COMPACT; |
0d2bcfaf | 669 | break; |
886a2506 | 670 | case bfd_mach_arc_arc601: |
886a2506 | 671 | emf = EM_ARC_COMPACT; |
0d2bcfaf | 672 | break; |
886a2506 | 673 | case bfd_mach_arc_arc700: |
886a2506 | 674 | emf = EM_ARC_COMPACT; |
0d2bcfaf | 675 | break; |
8699fc3e AB |
676 | case bfd_mach_arc_nps400: |
677 | emf = EM_ARC_COMPACT; | |
678 | break; | |
886a2506 | 679 | case bfd_mach_arc_arcv2: |
886a2506 | 680 | emf = EM_ARC_COMPACT2; |
0d2bcfaf | 681 | break; |
886a2506 | 682 | default: |
3c8adaca | 683 | goto DO_NOTHING; |
252b5132 | 684 | } |
34e967a5 | 685 | |
886a2506 | 686 | elf_elfheader (abfd)->e_machine = emf; |
7e458899 | 687 | |
886a2506 NC |
688 | /* Record whatever is the current syscall ABI version. */ |
689 | elf_elfheader (abfd)->e_flags |= E_ARC_OSABI_CURRENT; | |
3c8adaca CZ |
690 | |
691 | DO_NOTHING: | |
692 | return; | |
252b5132 RH |
693 | } |
694 | ||
886a2506 NC |
695 | #define BFD_DEBUG_PIC(...) |
696 | ||
697 | struct arc_relocation_data | |
698 | { | |
094fb063 CZ |
699 | bfd_signed_vma reloc_offset; |
700 | bfd_signed_vma reloc_addend; | |
701 | bfd_signed_vma got_offset_value; | |
886a2506 | 702 | |
094fb063 | 703 | bfd_signed_vma sym_value; |
886a2506 NC |
704 | asection * sym_section; |
705 | ||
706 | reloc_howto_type *howto; | |
707 | ||
708 | asection * input_section; | |
709 | ||
094fb063 | 710 | bfd_signed_vma sdata_begin_symbol_vma; |
886a2506 | 711 | bfd_boolean sdata_begin_symbol_vma_set; |
094fb063 | 712 | bfd_signed_vma got_symbol_vma; |
886a2506 NC |
713 | |
714 | bfd_boolean should_relocate; | |
4b0c052e AB |
715 | |
716 | const char * symbol_name; | |
886a2506 NC |
717 | }; |
718 | ||
719 | static void | |
720 | debug_arc_reloc (struct arc_relocation_data reloc_data) | |
721 | { | |
34e967a5 | 722 | PR_DEBUG ("Reloc type=%s, should_relocate = %s\n", |
886a2506 NC |
723 | reloc_data.howto->name, |
724 | reloc_data.should_relocate ? "true" : "false"); | |
34e967a5 | 725 | PR_DEBUG (" offset = 0x%x, addend = 0x%x\n", |
886a2506 NC |
726 | (unsigned int) reloc_data.reloc_offset, |
727 | (unsigned int) reloc_data.reloc_addend); | |
34e967a5 MC |
728 | PR_DEBUG (" Symbol:\n"); |
729 | PR_DEBUG (" value = 0x%08x\n", | |
886a2506 NC |
730 | (unsigned int) reloc_data.sym_value); |
731 | if (reloc_data.sym_section != NULL) | |
732 | { | |
3c8adaca | 733 | PR_DEBUG (" Symbol Section:\n"); |
34e967a5 MC |
734 | PR_DEBUG ( |
735 | " section name = %s, output_offset 0x%08x", | |
886a2506 | 736 | reloc_data.sym_section->name, |
34e967a5 MC |
737 | (unsigned int) reloc_data.sym_section->output_offset); |
738 | if (reloc_data.sym_section->output_section != NULL) | |
739 | { | |
740 | PR_DEBUG ( | |
741 | ", output_section->vma = 0x%08x", | |
742 | ((unsigned int) reloc_data.sym_section->output_section->vma)); | |
743 | } | |
34e967a5 | 744 | PR_DEBUG ( "\n"); |
3c8adaca | 745 | PR_DEBUG (" file: %s\n", reloc_data.sym_section->owner->filename); |
886a2506 NC |
746 | } |
747 | else | |
34e967a5 MC |
748 | { |
749 | PR_DEBUG ( " symbol section is NULL\n"); | |
750 | } | |
886a2506 | 751 | |
34e967a5 | 752 | PR_DEBUG ( " Input_section:\n"); |
886a2506 NC |
753 | if (reloc_data.input_section != NULL) |
754 | { | |
34e967a5 | 755 | PR_DEBUG ( |
886a2506 NC |
756 | " section name = %s, output_offset 0x%08x, output_section->vma = 0x%08x\n", |
757 | reloc_data.input_section->name, | |
758 | (unsigned int) reloc_data.input_section->output_offset, | |
759 | (unsigned int) reloc_data.input_section->output_section->vma); | |
34e967a5 | 760 | PR_DEBUG ( " changed_address = 0x%08x\n", |
886a2506 NC |
761 | (unsigned int) (reloc_data.input_section->output_section->vma + |
762 | reloc_data.input_section->output_offset + | |
763 | reloc_data.reloc_offset)); | |
3c8adaca | 764 | PR_DEBUG (" file: %s\n", reloc_data.input_section->owner->filename); |
886a2506 NC |
765 | } |
766 | else | |
34e967a5 MC |
767 | { |
768 | PR_DEBUG ( " input section is NULL\n"); | |
769 | } | |
886a2506 NC |
770 | } |
771 | ||
72f3b6aa CZ |
772 | static bfd_vma |
773 | middle_endian_convert (bfd_vma insn, bfd_boolean do_it) | |
6f4b1afc | 774 | { |
72f3b6aa CZ |
775 | if (do_it) |
776 | { | |
777 | insn = | |
778 | ((insn & 0xffff0000) >> 16) | | |
779 | ((insn & 0xffff) << 16); | |
780 | } | |
781 | return insn; | |
6f4b1afc CM |
782 | } |
783 | ||
4b0c052e AB |
784 | /* This function is called for relocations that are otherwise marked as NOT |
785 | requiring overflow checks. In here we perform non-standard checks of | |
786 | the relocation value. */ | |
787 | ||
788 | static inline bfd_reloc_status_type | |
789 | arc_special_overflow_checks (const struct arc_relocation_data reloc_data, | |
790 | bfd_signed_vma relocation, | |
791 | struct bfd_link_info *info ATTRIBUTE_UNUSED) | |
792 | { | |
793 | switch (reloc_data.howto->type) | |
794 | { | |
795 | case R_ARC_NPS_CMEM16: | |
796 | if (((relocation >> 16) & 0xffff) != NPS_CMEM_HIGH_VALUE) | |
797 | { | |
798 | if (reloc_data.reloc_addend == 0) | |
799 | (*_bfd_error_handler) | |
800 | (_("%B(%A+0x%lx): CMEM relocation to `%s' is invalid, " | |
801 | "16 MSB should be 0x%04x (value is 0x%lx)"), | |
802 | reloc_data.input_section->owner, | |
803 | reloc_data.input_section, | |
804 | reloc_data.reloc_offset, | |
805 | reloc_data.symbol_name, | |
806 | NPS_CMEM_HIGH_VALUE, | |
807 | (relocation)); | |
808 | else | |
809 | (*_bfd_error_handler) | |
810 | (_("%B(%A+0x%lx): CMEM relocation to `%s+0x%lx' is invalid, " | |
811 | "16 MSB should be 0x%04x (value is 0x%lx)"), | |
812 | reloc_data.input_section->owner, | |
813 | reloc_data.input_section, | |
814 | reloc_data.reloc_offset, | |
815 | reloc_data.symbol_name, | |
816 | reloc_data.reloc_addend, | |
817 | NPS_CMEM_HIGH_VALUE, | |
818 | (relocation)); | |
819 | return bfd_reloc_overflow; | |
820 | } | |
821 | break; | |
822 | ||
823 | default: | |
824 | break; | |
825 | } | |
826 | ||
827 | return bfd_reloc_ok; | |
828 | } | |
829 | ||
72f3b6aa CZ |
830 | #define ME(reloc) (reloc) |
831 | ||
832 | #define IS_ME(FORMULA,BFD) ((strstr (FORMULA, "ME") != NULL) \ | |
833 | && (!bfd_big_endian (BFD))) | |
834 | ||
094fb063 | 835 | #define S ((bfd_signed_vma) (reloc_data.sym_value \ |
34e967a5 MC |
836 | + (reloc_data.sym_section->output_section != NULL ? \ |
837 | (reloc_data.sym_section->output_offset \ | |
094fb063 CZ |
838 | + reloc_data.sym_section->output_section->vma) : 0))) |
839 | #define L ((bfd_signed_vma) (reloc_data.sym_value \ | |
34e967a5 MC |
840 | + (reloc_data.sym_section->output_section != NULL ? \ |
841 | (reloc_data.sym_section->output_offset \ | |
094fb063 | 842 | + reloc_data.sym_section->output_section->vma) : 0))) |
886a2506 NC |
843 | #define A (reloc_data.reloc_addend) |
844 | #define B (0) | |
845 | #define G (reloc_data.got_offset_value) | |
34e967a5 MC |
846 | #define GOT (reloc_data.got_symbol_vma) |
847 | #define GOT_BEGIN (htab->sgot->output_section->vma) | |
848 | ||
886a2506 | 849 | #define MES (0) |
34e967a5 MC |
850 | /* P: relative offset to PCL The offset should be to the |
851 | current location aligned to 32 bits. */ | |
094fb063 | 852 | #define P ((bfd_signed_vma) ( \ |
34e967a5 MC |
853 | ( \ |
854 | (reloc_data.input_section->output_section != NULL ? \ | |
855 | reloc_data.input_section->output_section->vma : 0) \ | |
856 | + reloc_data.input_section->output_offset \ | |
094fb063 CZ |
857 | + (reloc_data.reloc_offset - (bitsize >= 32 ? 4 : 0))) \ |
858 | & ~0x3)) | |
859 | #define PDATA ((bfd_signed_vma) ( \ | |
6f4b1afc CM |
860 | (reloc_data.input_section->output_section->vma \ |
861 | + reloc_data.input_section->output_offset \ | |
094fb063 | 862 | + (reloc_data.reloc_offset)))) |
2ab2f40d CM |
863 | #define SECTSTART (bfd_signed_vma) (reloc_data.sym_section->output_section->vma \ |
864 | + reloc_data.sym_section->output_offset) | |
865 | ||
094fb063 CZ |
866 | #define _SDA_BASE_ (bfd_signed_vma) (reloc_data.sdata_begin_symbol_vma) |
867 | #define TLS_REL (bfd_signed_vma) \ | |
868 | ((elf_hash_table (info))->tls_sec->output_section->vma) | |
34e967a5 MC |
869 | #define TLS_TBSS (8) |
870 | #define TCB_SIZE (8) | |
871 | ||
886a2506 NC |
872 | #define none (0) |
873 | ||
094fb063 | 874 | #define PRINT_DEBUG_RELOC_INFO_BEFORE(FORMULA, TYPE) \ |
34e967a5 MC |
875 | {\ |
876 | asection *sym_section = reloc_data.sym_section; \ | |
877 | asection *input_section = reloc_data.input_section; \ | |
094fb063 CZ |
878 | ARC_DEBUG ("RELOC_TYPE = " TYPE "\n"); \ |
879 | ARC_DEBUG ("FORMULA = " FORMULA "\n"); \ | |
34e967a5 MC |
880 | ARC_DEBUG ("S = 0x%x\n", S); \ |
881 | ARC_DEBUG ("A = 0x%x\n", A); \ | |
882 | ARC_DEBUG ("L = 0x%x\n", L); \ | |
883 | if (sym_section->output_section != NULL) \ | |
884 | { \ | |
885 | ARC_DEBUG ("symbol_section->vma = 0x%x\n", \ | |
886 | sym_section->output_section->vma + sym_section->output_offset); \ | |
887 | } \ | |
888 | else \ | |
889 | { \ | |
890 | ARC_DEBUG ("symbol_section->vma = NULL\n"); \ | |
891 | } \ | |
892 | if (input_section->output_section != NULL) \ | |
893 | { \ | |
894 | ARC_DEBUG ("symbol_section->vma = 0x%x\n", \ | |
895 | input_section->output_section->vma + input_section->output_offset); \ | |
896 | } \ | |
897 | else \ | |
898 | { \ | |
899 | ARC_DEBUG ("symbol_section->vma = NULL\n"); \ | |
900 | } \ | |
901 | ARC_DEBUG ("PCL = 0x%x\n", P); \ | |
902 | ARC_DEBUG ("P = 0x%x\n", P); \ | |
903 | ARC_DEBUG ("G = 0x%x\n", G); \ | |
904 | ARC_DEBUG ("SDA_OFFSET = 0x%x\n", _SDA_BASE_); \ | |
905 | ARC_DEBUG ("SDA_SET = %d\n", reloc_data.sdata_begin_symbol_vma_set); \ | |
906 | ARC_DEBUG ("GOT_OFFSET = 0x%x\n", GOT); \ | |
907 | ARC_DEBUG ("relocation = 0x%08x\n", relocation); \ | |
908 | ARC_DEBUG ("before = 0x%08x\n", (unsigned int) insn); \ | |
909 | ARC_DEBUG ("data = 0x%08x (%u) (%d)\n", (unsigned int) relocation, (unsigned int) relocation, (int) relocation); \ | |
910 | } | |
911 | ||
912 | #define PRINT_DEBUG_RELOC_INFO_AFTER \ | |
913 | { \ | |
914 | ARC_DEBUG ("after = 0x%08x\n", (unsigned int) insn); \ | |
915 | } | |
916 | ||
886a2506 NC |
917 | #define ARC_RELOC_HOWTO(TYPE, VALUE, SIZE, BITSIZE, RELOC_FUNCTION, OVERFLOW, FORMULA) \ |
918 | case R_##TYPE: \ | |
919 | { \ | |
094fb063 | 920 | bfd_signed_vma bitsize ATTRIBUTE_UNUSED = BITSIZE; \ |
886a2506 | 921 | relocation = FORMULA ; \ |
094fb063 | 922 | PRINT_DEBUG_RELOC_INFO_BEFORE (#FORMULA, #TYPE); \ |
72f3b6aa | 923 | insn = middle_endian_convert (insn, IS_ME (#FORMULA, abfd)); \ |
094fb063 | 924 | insn = (* get_replace_function (abfd, TYPE)) (insn, relocation); \ |
72f3b6aa | 925 | insn = middle_endian_convert (insn, IS_ME (#FORMULA, abfd)); \ |
34e967a5 | 926 | PRINT_DEBUG_RELOC_INFO_AFTER \ |
886a2506 NC |
927 | } \ |
928 | break; | |
929 | ||
930 | static bfd_reloc_status_type | |
34e967a5 MC |
931 | arc_do_relocation (bfd_byte * contents, |
932 | struct arc_relocation_data reloc_data, | |
933 | struct bfd_link_info *info) | |
886a2506 | 934 | { |
094fb063 | 935 | bfd_signed_vma relocation = 0; |
886a2506 NC |
936 | bfd_vma insn; |
937 | bfd_vma orig_insn ATTRIBUTE_UNUSED; | |
72f3b6aa | 938 | bfd * abfd = reloc_data.input_section->owner; |
34e967a5 | 939 | struct elf_link_hash_table *htab ATTRIBUTE_UNUSED = elf_hash_table (info); |
4b0c052e | 940 | bfd_reloc_status_type flag; |
886a2506 NC |
941 | |
942 | if (reloc_data.should_relocate == FALSE) | |
34e967a5 | 943 | return bfd_reloc_ok; |
886a2506 NC |
944 | |
945 | switch (reloc_data.howto->size) | |
946 | { | |
947 | case 2: | |
72f3b6aa | 948 | insn = arc_bfd_get_32 (abfd, |
886a2506 NC |
949 | contents + reloc_data.reloc_offset, |
950 | reloc_data.input_section); | |
951 | break; | |
952 | case 1: | |
72f3b6aa CZ |
953 | insn = arc_bfd_get_16 (abfd, |
954 | contents + reloc_data.reloc_offset, | |
955 | reloc_data.input_section); | |
956 | break; | |
886a2506 | 957 | case 0: |
72f3b6aa | 958 | insn = arc_bfd_get_8 (abfd, |
886a2506 NC |
959 | contents + reloc_data.reloc_offset, |
960 | reloc_data.input_section); | |
961 | break; | |
962 | default: | |
963 | insn = 0; | |
964 | BFD_ASSERT (0); | |
965 | break; | |
966 | } | |
967 | ||
968 | orig_insn = insn; | |
969 | ||
970 | switch (reloc_data.howto->type) | |
971 | { | |
34e967a5 | 972 | #include "elf/arc-reloc.def" |
886a2506 NC |
973 | |
974 | default: | |
975 | BFD_ASSERT (0); | |
976 | break; | |
977 | } | |
978 | ||
979 | /* Check for relocation overflow. */ | |
980 | if (reloc_data.howto->complain_on_overflow != complain_overflow_dont) | |
4b0c052e AB |
981 | flag = bfd_check_overflow (reloc_data.howto->complain_on_overflow, |
982 | reloc_data.howto->bitsize, | |
983 | reloc_data.howto->rightshift, | |
984 | bfd_arch_bits_per_address (abfd), | |
985 | relocation); | |
986 | else | |
987 | flag = arc_special_overflow_checks (reloc_data, relocation, info); | |
886a2506 | 988 | |
34e967a5 | 989 | #undef DEBUG_ARC_RELOC |
886a2506 | 990 | #define DEBUG_ARC_RELOC(A) debug_arc_reloc (A) |
4b0c052e AB |
991 | if (flag != bfd_reloc_ok) |
992 | { | |
993 | PR_DEBUG ( "Relocation overflows !!!!\n"); | |
886a2506 | 994 | |
4b0c052e | 995 | DEBUG_ARC_RELOC (reloc_data); |
886a2506 | 996 | |
4b0c052e AB |
997 | PR_DEBUG ( |
998 | "Relocation value = signed -> %d, unsigned -> %u" | |
999 | ", hex -> (0x%08x)\n", | |
1000 | (int) relocation, | |
1001 | (unsigned int) relocation, | |
1002 | (unsigned int) relocation); | |
1003 | return flag; | |
886a2506 | 1004 | } |
34e967a5 | 1005 | #undef DEBUG_ARC_RELOC |
886a2506 NC |
1006 | #define DEBUG_ARC_RELOC(A) |
1007 | ||
4b0c052e | 1008 | /* Write updated instruction back to memory. */ |
886a2506 NC |
1009 | switch (reloc_data.howto->size) |
1010 | { | |
1011 | case 2: | |
72f3b6aa | 1012 | arc_bfd_put_32 (abfd, insn, |
886a2506 NC |
1013 | contents + reloc_data.reloc_offset, |
1014 | reloc_data.input_section); | |
1015 | break; | |
1016 | case 1: | |
72f3b6aa CZ |
1017 | arc_bfd_put_16 (abfd, insn, |
1018 | contents + reloc_data.reloc_offset, | |
1019 | reloc_data.input_section); | |
1020 | break; | |
886a2506 | 1021 | case 0: |
72f3b6aa | 1022 | arc_bfd_put_8 (abfd, insn, |
886a2506 NC |
1023 | contents + reloc_data.reloc_offset, |
1024 | reloc_data.input_section); | |
1025 | break; | |
1026 | default: | |
1027 | ARC_DEBUG ("size = %d\n", reloc_data.howto->size); | |
1028 | BFD_ASSERT (0); | |
1029 | break; | |
1030 | } | |
1031 | ||
1032 | return bfd_reloc_ok; | |
1033 | } | |
1034 | #undef S | |
1035 | #undef A | |
1036 | #undef B | |
1037 | #undef G | |
1038 | #undef GOT | |
1039 | #undef L | |
1040 | #undef MES | |
1041 | #undef P | |
1042 | #undef SECTSTAR | |
1043 | #undef SECTSTART | |
1044 | #undef _SDA_BASE_ | |
1045 | #undef none | |
1046 | ||
1047 | #undef ARC_RELOC_HOWTO | |
1048 | ||
34e967a5 MC |
1049 | static struct got_entry ** |
1050 | arc_get_local_got_ents (bfd * abfd) | |
886a2506 | 1051 | { |
34e967a5 | 1052 | static struct got_entry **local_got_ents = NULL; |
886a2506 | 1053 | |
34e967a5 | 1054 | if (local_got_ents == NULL) |
886a2506 NC |
1055 | { |
1056 | size_t size; | |
886a2506 NC |
1057 | Elf_Internal_Shdr *symtab_hdr = &((elf_tdata (abfd))->symtab_hdr); |
1058 | ||
1059 | size = symtab_hdr->sh_info * sizeof (bfd_vma); | |
34e967a5 MC |
1060 | local_got_ents = (struct got_entry **) |
1061 | bfd_alloc (abfd, sizeof(struct got_entry *) * size); | |
1062 | if (local_got_ents == NULL) | |
886a2506 | 1063 | return FALSE; |
34e967a5 MC |
1064 | |
1065 | memset (local_got_ents, 0, sizeof(struct got_entry *) * size); | |
1066 | elf_local_got_ents (abfd) = local_got_ents; | |
886a2506 NC |
1067 | } |
1068 | ||
34e967a5 | 1069 | return local_got_ents; |
886a2506 NC |
1070 | } |
1071 | ||
886a2506 NC |
1072 | /* Relocate an arc ELF section. |
1073 | Function : elf_arc_relocate_section | |
1074 | Brief : Relocate an arc section, by handling all the relocations | |
34e967a5 | 1075 | appearing in that section. |
886a2506 | 1076 | Args : output_bfd : The bfd being written to. |
34e967a5 MC |
1077 | info : Link information. |
1078 | input_bfd : The input bfd. | |
1079 | input_section : The section being relocated. | |
1080 | contents : contents of the section being relocated. | |
1081 | relocs : List of relocations in the section. | |
1082 | local_syms : is a pointer to the swapped in local symbols. | |
1083 | local_section : is an array giving the section in the input file | |
1084 | corresponding to the st_shndx field of each | |
1085 | local symbol. */ | |
886a2506 | 1086 | static bfd_boolean |
34e967a5 | 1087 | elf_arc_relocate_section (bfd * output_bfd, |
886a2506 | 1088 | struct bfd_link_info * info, |
34e967a5 MC |
1089 | bfd * input_bfd, |
1090 | asection * input_section, | |
1091 | bfd_byte * contents, | |
886a2506 NC |
1092 | Elf_Internal_Rela * relocs, |
1093 | Elf_Internal_Sym * local_syms, | |
34e967a5 | 1094 | asection ** local_sections) |
886a2506 | 1095 | { |
34e967a5 | 1096 | Elf_Internal_Shdr * symtab_hdr; |
886a2506 | 1097 | struct elf_link_hash_entry ** sym_hashes; |
34e967a5 MC |
1098 | struct got_entry ** local_got_ents; |
1099 | Elf_Internal_Rela * rel; | |
3c8adaca | 1100 | Elf_Internal_Rela * wrel; |
34e967a5 MC |
1101 | Elf_Internal_Rela * relend; |
1102 | struct elf_link_hash_table *htab = elf_hash_table (info); | |
886a2506 NC |
1103 | |
1104 | symtab_hdr = &((elf_tdata (input_bfd))->symtab_hdr); | |
1105 | sym_hashes = elf_sym_hashes (input_bfd); | |
1106 | ||
3c8adaca | 1107 | rel = wrel = relocs; |
886a2506 | 1108 | relend = relocs + input_section->reloc_count; |
3c8adaca | 1109 | for (; rel < relend; wrel++, rel++) |
886a2506 NC |
1110 | { |
1111 | enum elf_arc_reloc_type r_type; | |
34e967a5 MC |
1112 | reloc_howto_type * howto; |
1113 | unsigned long r_symndx; | |
886a2506 | 1114 | struct elf_link_hash_entry * h; |
34e967a5 MC |
1115 | Elf_Internal_Sym * sym; |
1116 | asection * sec; | |
1117 | struct elf_link_hash_entry *h2; | |
886a2506 NC |
1118 | |
1119 | struct arc_relocation_data reloc_data = | |
1120 | { | |
34e967a5 MC |
1121 | .reloc_offset = 0, |
1122 | .reloc_addend = 0, | |
1123 | .got_offset_value = 0, | |
1124 | .sym_value = 0, | |
1125 | .sym_section = NULL, | |
1126 | .howto = NULL, | |
1127 | .input_section = NULL, | |
1128 | .sdata_begin_symbol_vma = 0, | |
1129 | .sdata_begin_symbol_vma_set = FALSE, | |
1130 | .got_symbol_vma = 0, | |
1131 | .should_relocate = FALSE | |
886a2506 NC |
1132 | }; |
1133 | ||
34e967a5 MC |
1134 | r_type = ELF32_R_TYPE (rel->r_info); |
1135 | ||
1136 | if (r_type >= (int) R_ARC_max) | |
1137 | { | |
1138 | bfd_set_error (bfd_error_bad_value); | |
1139 | return FALSE; | |
1140 | } | |
3c8adaca | 1141 | howto = arc_elf_howto (r_type); |
34e967a5 MC |
1142 | |
1143 | r_symndx = ELF32_R_SYM (rel->r_info); | |
1144 | ||
1145 | /* If we are generating another .o file and the symbol in not | |
1146 | local, skip this relocation. */ | |
1147 | if (bfd_link_relocatable (info)) | |
1148 | { | |
1149 | /* This is a relocateable link. We don't have to change | |
1150 | anything, unless the reloc is against a section symbol, | |
1151 | in which case we have to adjust according to where the | |
1152 | section symbol winds up in the output section. */ | |
1153 | ||
1154 | /* Checks if this is a local symbol and thus the reloc | |
1155 | might (will??) be against a section symbol. */ | |
1156 | if (r_symndx < symtab_hdr->sh_info) | |
1157 | { | |
1158 | sym = local_syms + r_symndx; | |
1159 | if (ELF_ST_TYPE (sym->st_info) == STT_SECTION) | |
1160 | { | |
1161 | sec = local_sections[r_symndx]; | |
1162 | ||
1163 | /* for RELA relocs.Just adjust the addend | |
1164 | value in the relocation entry. */ | |
1165 | rel->r_addend += sec->output_offset + sym->st_value; | |
1166 | ||
1167 | BFD_DEBUG_PIC ( | |
1168 | PR_DEBUG ("local symbols reloc " | |
1169 | "(section=%d %s) seen in %s\n", | |
1170 | r_symndx, | |
1171 | local_sections[r_symndx]->name, | |
1172 | __PRETTY_FUNCTION__) | |
1173 | ); | |
1174 | } | |
1175 | } | |
34e967a5 | 1176 | } |
886a2506 NC |
1177 | |
1178 | h2 = elf_link_hash_lookup (elf_hash_table (info), "__SDATA_BEGIN__", | |
1179 | FALSE, FALSE, TRUE); | |
1180 | ||
1181 | if (reloc_data.sdata_begin_symbol_vma_set == FALSE | |
34e967a5 MC |
1182 | && h2 != NULL && h2->root.type != bfd_link_hash_undefined |
1183 | && h2->root.u.def.section->output_section != NULL) | |
1184 | /* TODO: Verify this condition. */ | |
886a2506 NC |
1185 | { |
1186 | reloc_data.sdata_begin_symbol_vma = | |
1187 | (h2->root.u.def.value + | |
1188 | h2->root.u.def.section->output_section->vma); | |
1189 | reloc_data.sdata_begin_symbol_vma_set = TRUE; | |
1190 | } | |
1191 | ||
886a2506 NC |
1192 | reloc_data.input_section = input_section; |
1193 | reloc_data.howto = howto; | |
1194 | reloc_data.reloc_offset = rel->r_offset; | |
1195 | reloc_data.reloc_addend = rel->r_addend; | |
1196 | ||
886a2506 NC |
1197 | /* This is a final link. */ |
1198 | h = NULL; | |
1199 | sym = NULL; | |
1200 | sec = NULL; | |
1201 | ||
1202 | if (r_symndx < symtab_hdr->sh_info) /* A local symbol. */ | |
1203 | { | |
1204 | sym = local_syms + r_symndx; | |
1205 | sec = local_sections[r_symndx]; | |
3c8adaca CZ |
1206 | } |
1207 | else | |
1208 | { | |
1209 | /* TODO: This code is repeated from below. We should | |
1210 | clean it and remove duplications. | |
1211 | Sec is used check for discarded sections. | |
1212 | Need to redesign code below. */ | |
1213 | ||
1214 | /* Get the symbol's entry in the symtab. */ | |
1215 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
1216 | ||
1217 | while (h->root.type == bfd_link_hash_indirect | |
1218 | || h->root.type == bfd_link_hash_warning) | |
1219 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
1220 | ||
1221 | /* If we have encountered a definition for this symbol. */ | |
1222 | if (h->root.type == bfd_link_hash_defined | |
1223 | || h->root.type == bfd_link_hash_defweak) | |
1224 | { | |
1225 | reloc_data.sym_value = h->root.u.def.value; | |
1226 | sec = h->root.u.def.section; | |
1227 | } | |
1228 | } | |
1229 | ||
1230 | /* Clean relocs for symbols in discarded sections. */ | |
1231 | if (sec != NULL && discarded_section (sec)) | |
1232 | { | |
1233 | _bfd_clear_contents (howto, input_bfd, input_section, | |
1234 | contents + rel->r_offset); | |
1235 | rel->r_offset = rel->r_offset; | |
1236 | rel->r_info = 0; | |
1237 | rel->r_addend = 0; | |
1238 | ||
1239 | /* For ld -r, remove relocations in debug sections against | |
1240 | sections defined in discarded sections. Not done for | |
1241 | eh_frame editing code expects to be present. */ | |
1242 | if (bfd_link_relocatable (info) | |
1243 | && (input_section->flags & SEC_DEBUGGING)) | |
1244 | wrel--; | |
1245 | ||
1246 | continue; | |
1247 | } | |
1248 | ||
1249 | if (bfd_link_relocatable (info)) | |
1250 | { | |
1251 | if (wrel != rel) | |
1252 | *wrel = *rel; | |
1253 | continue; | |
1254 | } | |
1255 | ||
1256 | if (r_symndx < symtab_hdr->sh_info) /* A local symbol. */ | |
1257 | { | |
1258 | struct got_entry *entry; | |
1259 | ||
1260 | local_got_ents = arc_get_local_got_ents (output_bfd); | |
1261 | entry = local_got_ents[r_symndx]; | |
886a2506 NC |
1262 | |
1263 | reloc_data.sym_value = sym->st_value; | |
1264 | reloc_data.sym_section = sec; | |
4b0c052e | 1265 | reloc_data.symbol_name = |
3c8adaca CZ |
1266 | bfd_elf_string_from_elf_section (input_bfd, |
1267 | symtab_hdr->sh_link, | |
1268 | sym->st_name); | |
886a2506 | 1269 | |
841fdfcd CZ |
1270 | /* Mergeable section handling. */ |
1271 | if ((sec->flags & SEC_MERGE) | |
1272 | && ELF_ST_TYPE (sym->st_info) == STT_SECTION) | |
1273 | { | |
1274 | asection *msec; | |
1275 | msec = sec; | |
1276 | rel->r_addend = _bfd_elf_rel_local_sym (output_bfd, sym, | |
1277 | &msec, rel->r_addend); | |
1278 | rel->r_addend -= (sec->output_section->vma | |
1279 | + sec->output_offset | |
1280 | + sym->st_value); | |
1281 | rel->r_addend += msec->output_section->vma + msec->output_offset; | |
1282 | ||
1283 | reloc_data.reloc_addend = rel->r_addend; | |
1284 | } | |
1285 | ||
34e967a5 MC |
1286 | if ((is_reloc_for_GOT (howto) |
1287 | || is_reloc_for_TLS (howto)) && entry != NULL) | |
1288 | { | |
1289 | if (is_reloc_for_TLS (howto)) | |
1290 | while (entry->type == GOT_NORMAL && entry->next != NULL) | |
1291 | entry = entry->next; | |
1292 | ||
1293 | if (is_reloc_for_GOT (howto)) | |
1294 | while (entry->type != GOT_NORMAL && entry->next != NULL) | |
1295 | entry = entry->next; | |
1296 | ||
1297 | if (entry->type == GOT_TLS_GD && entry->processed == FALSE) | |
1298 | { | |
1299 | bfd_vma sym_vma = sym->st_value | |
1300 | + sec->output_section->vma | |
1301 | + sec->output_offset; | |
1302 | ||
1303 | /* Create dynamic relocation for local sym. */ | |
1304 | ADD_RELA (output_bfd, got, entry->offset, 0, | |
1305 | R_ARC_TLS_DTPMOD, 0); | |
1306 | ADD_RELA (output_bfd, got, entry->offset+4, 0, | |
1307 | R_ARC_TLS_DTPOFF, 0); | |
1308 | ||
1309 | bfd_vma sec_vma = sec->output_section->vma | |
1310 | + sec->output_offset; | |
1311 | bfd_put_32 (output_bfd, sym_vma - sec_vma, | |
1312 | htab->sgot->contents + entry->offset + 4); | |
1313 | ||
1314 | ARC_DEBUG ("arc_info: FIXED -> GOT_TLS_GD value " | |
1315 | "= 0x%x @ 0x%x, for symbol %s\n", | |
1316 | sym_vma - sec_vma, | |
1317 | htab->sgot->contents + entry->offset + 4, | |
1318 | "(local)"); | |
1319 | ||
1320 | entry->processed = TRUE; | |
1321 | } | |
1322 | if (entry->type == GOT_TLS_IE && entry->processed == FALSE) | |
1323 | { | |
1324 | bfd_vma sym_vma = sym->st_value | |
1325 | + sec->output_section->vma | |
1326 | + sec->output_offset; | |
1327 | bfd_vma sec_vma = htab->tls_sec->output_section->vma; | |
1328 | bfd_put_32 (output_bfd, sym_vma - sec_vma, | |
1329 | htab->sgot->contents + entry->offset); | |
1330 | /* TODO: Check if this type of relocs is the cause | |
1331 | for all the ARC_NONE dynamic relocs. */ | |
1332 | ||
1333 | ARC_DEBUG ("arc_info: FIXED -> GOT_TLS_IE value = " | |
1334 | "0x%x @ 0x%x, for symbol %s\n", | |
1335 | sym_vma - sec_vma, | |
1336 | htab->sgot->contents + entry->offset, | |
1337 | "(local)"); | |
1338 | ||
1339 | entry->processed = TRUE; | |
1340 | } | |
1341 | if (entry->type == GOT_NORMAL && entry->processed == FALSE) | |
1342 | { | |
1343 | bfd_vma sec_vma = reloc_data.sym_section->output_section->vma | |
1344 | + reloc_data.sym_section->output_offset; | |
1345 | ||
1346 | bfd_put_32 (output_bfd, reloc_data.sym_value + sec_vma, | |
1347 | htab->sgot->contents + entry->offset); | |
1348 | ||
1349 | ARC_DEBUG ("arc_info: PATCHED: 0x%08x @ 0x%08x for " | |
1350 | "sym %s in got offset 0x%x\n", | |
1351 | reloc_data.sym_value + sec_vma, | |
1352 | htab->sgot->output_section->vma | |
1353 | + htab->sgot->output_offset + entry->offset, | |
1354 | "(local)", | |
1355 | entry->offset); | |
1356 | entry->processed = TRUE; | |
1357 | } | |
1358 | ||
1359 | reloc_data.got_offset_value = entry->offset; | |
1360 | ARC_DEBUG ("arc_info: GOT_ENTRY = %d, offset = 0x%x, " | |
1361 | "vma = 0x%x for symbol %s\n", | |
1362 | entry->type, entry->offset, | |
1363 | htab->sgot->output_section->vma | |
1364 | + htab->sgot->output_offset + entry->offset, | |
1365 | "(local)"); | |
1366 | } | |
1367 | ||
1368 | BFD_ASSERT (htab->sgot != NULL || !is_reloc_for_GOT (howto)); | |
1369 | if (htab->sgot != NULL) | |
1370 | reloc_data.got_symbol_vma = htab->sgot->output_section->vma | |
1371 | + htab->sgot->output_offset; | |
886a2506 NC |
1372 | |
1373 | reloc_data.should_relocate = TRUE; | |
1374 | } | |
1375 | else /* Global symbol. */ | |
1376 | { | |
1377 | /* Get the symbol's entry in the symtab. */ | |
1378 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
1379 | ||
1380 | while (h->root.type == bfd_link_hash_indirect | |
1381 | || h->root.type == bfd_link_hash_warning) | |
1382 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
1383 | ||
3c8adaca CZ |
1384 | /* TODO: Need to validate what was the intention. */ |
1385 | /* BFD_ASSERT ((h->dynindx == -1) || (h->forced_local != 0)); */ | |
4b0c052e | 1386 | reloc_data.symbol_name = h->root.root.string; |
3c8adaca | 1387 | |
886a2506 NC |
1388 | /* If we have encountered a definition for this symbol. */ |
1389 | if (h->root.type == bfd_link_hash_defined | |
1390 | || h->root.type == bfd_link_hash_defweak) | |
1391 | { | |
1392 | reloc_data.sym_value = h->root.u.def.value; | |
1393 | reloc_data.sym_section = h->root.u.def.section; | |
1394 | ||
1395 | reloc_data.should_relocate = TRUE; | |
1396 | ||
34e967a5 | 1397 | if (is_reloc_for_GOT (howto) && !bfd_link_pic (info)) |
886a2506 | 1398 | { |
34e967a5 MC |
1399 | /* TODO: Change it to use arc_do_relocation with |
1400 | ARC_32 reloc. Try to use ADD_RELA macro. */ | |
886a2506 NC |
1401 | bfd_vma relocation = |
1402 | reloc_data.sym_value + reloc_data.reloc_addend | |
34e967a5 MC |
1403 | + (reloc_data.sym_section->output_section != NULL ? |
1404 | (reloc_data.sym_section->output_offset | |
1405 | + reloc_data.sym_section->output_section->vma) | |
1406 | : 0); | |
1407 | ||
1408 | BFD_ASSERT (h->got.glist); | |
1409 | bfd_vma got_offset = h->got.glist->offset; | |
1410 | bfd_put_32 (output_bfd, relocation, | |
1411 | htab->sgot->contents + got_offset); | |
1412 | } | |
1413 | if (is_reloc_for_PLT (howto) && h->plt.offset != (bfd_vma) -1) | |
1414 | { | |
1415 | /* TODO: This is repeated up here. */ | |
1416 | reloc_data.sym_value = h->plt.offset; | |
1417 | reloc_data.sym_section = htab->splt; | |
886a2506 NC |
1418 | } |
1419 | } | |
1420 | else if (h->root.type == bfd_link_hash_undefweak) | |
1421 | { | |
1422 | /* Is weak symbol and has no definition. */ | |
34e967a5 MC |
1423 | if (is_reloc_for_GOT (howto)) |
1424 | { | |
1425 | reloc_data.sym_value = h->root.u.def.value; | |
1426 | reloc_data.sym_section = htab->sgot; | |
1427 | reloc_data.should_relocate = TRUE; | |
1428 | } | |
1429 | else if (is_reloc_for_PLT (howto) | |
1430 | && h->plt.offset != (bfd_vma) -1) | |
1431 | { | |
1432 | /* TODO: This is repeated up here. */ | |
1433 | reloc_data.sym_value = h->plt.offset; | |
1434 | reloc_data.sym_section = htab->splt; | |
1435 | reloc_data.should_relocate = TRUE; | |
1436 | } | |
1437 | else | |
1438 | continue; | |
886a2506 NC |
1439 | } |
1440 | else | |
1441 | { | |
1442 | if (is_reloc_for_GOT (howto)) | |
1443 | { | |
886a2506 | 1444 | reloc_data.sym_value = h->root.u.def.value; |
34e967a5 | 1445 | reloc_data.sym_section = htab->sgot; |
886a2506 NC |
1446 | |
1447 | reloc_data.should_relocate = TRUE; | |
1448 | } | |
1449 | else if (is_reloc_for_PLT (howto)) | |
1450 | { | |
7e458899 CZ |
1451 | /* Fail if it is linking for PIE and the symbol is |
1452 | undefined. */ | |
1a72702b AM |
1453 | if (bfd_link_executable (info)) |
1454 | (*info->callbacks->undefined_symbol) | |
1455 | (info, h->root.root.string, input_bfd, input_section, | |
1456 | rel->r_offset, TRUE); | |
886a2506 | 1457 | reloc_data.sym_value = h->plt.offset; |
34e967a5 | 1458 | reloc_data.sym_section = htab->splt; |
886a2506 NC |
1459 | |
1460 | reloc_data.should_relocate = TRUE; | |
1461 | } | |
1a72702b AM |
1462 | else if (!bfd_link_pic (info)) |
1463 | (*info->callbacks->undefined_symbol) | |
1464 | (info, h->root.root.string, input_bfd, input_section, | |
1465 | rel->r_offset, TRUE); | |
886a2506 NC |
1466 | } |
1467 | ||
34e967a5 MC |
1468 | if (h->got.glist != NULL) |
1469 | { | |
1470 | struct got_entry *entry = h->got.glist; | |
1471 | ||
1472 | if (is_reloc_for_GOT (howto) || is_reloc_for_TLS (howto)) | |
1473 | { | |
1474 | if (! elf_hash_table (info)->dynamic_sections_created | |
1475 | || (bfd_link_pic (info) | |
1476 | && SYMBOL_REFERENCES_LOCAL (info, h))) | |
1477 | { | |
1478 | reloc_data.sym_value = h->root.u.def.value; | |
1479 | reloc_data.sym_section = h->root.u.def.section; | |
1480 | ||
1481 | if (is_reloc_for_TLS (howto)) | |
1482 | while (entry->type == GOT_NORMAL && entry->next != NULL) | |
1483 | entry = entry->next; | |
1484 | ||
1485 | if (entry->processed == FALSE | |
1486 | && (entry->type == GOT_TLS_GD | |
1487 | || entry->type == GOT_TLS_IE)) | |
1488 | { | |
1489 | bfd_vma sym_value = h->root.u.def.value | |
1490 | + h->root.u.def.section->output_section->vma | |
1491 | + h->root.u.def.section->output_offset; | |
1492 | ||
1493 | bfd_vma sec_vma = | |
1494 | elf_hash_table (info)->tls_sec->output_section->vma; | |
1495 | ||
1496 | bfd_put_32 (output_bfd, | |
1497 | sym_value - sec_vma, | |
1498 | htab->sgot->contents + entry->offset | |
33cbe6c0 | 1499 | + (entry->existing_entries == TLS_GOT_MOD_AND_OFF ? 4 : 0)); |
34e967a5 MC |
1500 | |
1501 | ARC_DEBUG ("arc_info: FIXED -> %s value = 0x%x " | |
1502 | "@ 0x%x, for symbol %s\n", | |
1503 | (entry->type == GOT_TLS_GD ? "GOT_TLS_GD" : | |
1504 | "GOT_TLS_IE"), | |
1505 | sym_value - sec_vma, | |
1506 | htab->sgot->contents + entry->offset | |
33cbe6c0 | 1507 | + (entry->existing_entries == TLS_GOT_MOD_AND_OFF ? 4 : 0), |
34e967a5 MC |
1508 | h->root.root.string); |
1509 | ||
1510 | entry->processed = TRUE; | |
1511 | } | |
1512 | ||
1513 | if (entry->type == GOT_TLS_IE && entry->processed == FALSE) | |
1514 | { | |
1515 | bfd_vma sec_vma = htab->tls_sec->output_section->vma; | |
1516 | bfd_put_32 (output_bfd, | |
1517 | reloc_data.sym_value - sec_vma, | |
1518 | htab->sgot->contents + entry->offset); | |
1519 | } | |
1520 | ||
1521 | if (entry->type == GOT_NORMAL && entry->processed == FALSE) | |
1522 | { | |
1523 | bfd_vma sec_vma = | |
1524 | reloc_data.sym_section->output_section->vma | |
1525 | + reloc_data.sym_section->output_offset; | |
1526 | ||
1527 | if (h->root.type != bfd_link_hash_undefweak) | |
1528 | { | |
1529 | bfd_put_32 (output_bfd, | |
1530 | reloc_data.sym_value + sec_vma, | |
1531 | htab->sgot->contents + entry->offset); | |
1532 | ||
1533 | ARC_DEBUG ("arc_info: PATCHED: 0x%08x " | |
1534 | "@ 0x%08x for sym %s in got offset 0x%x\n", | |
1535 | reloc_data.sym_value + sec_vma, | |
1536 | htab->sgot->output_section->vma | |
1537 | + htab->sgot->output_offset + entry->offset, | |
1538 | h->root.root.string, | |
1539 | entry->offset); | |
1540 | } | |
1541 | else | |
1542 | { | |
1543 | ARC_DEBUG ("arc_info: PATCHED: NOT_PATCHED " | |
1544 | "@ 0x%08x for sym %s in got offset 0x%x " | |
1545 | "(is undefweak)\n", | |
1546 | htab->sgot->output_section->vma | |
1547 | + htab->sgot->output_offset + entry->offset, | |
1548 | h->root.root.string, | |
1549 | entry->offset); | |
1550 | } | |
1551 | ||
1552 | entry->processed = TRUE; | |
1553 | } | |
1554 | } | |
1555 | } | |
1556 | ||
1557 | reloc_data.got_offset_value = entry->offset; | |
1558 | ||
1559 | ARC_DEBUG ("arc_info: GOT_ENTRY = %d, offset = 0x%x, " | |
1560 | "vma = 0x%x for symbol %s\n", | |
1561 | entry->type, entry->offset, | |
1562 | htab->sgot->output_section->vma | |
1563 | + htab->sgot->output_offset + entry->offset, | |
1564 | h->root.root.string); | |
1565 | } | |
1566 | ||
1567 | BFD_ASSERT (htab->sgot != NULL || !is_reloc_for_GOT (howto)); | |
1568 | if (htab->sgot != NULL) | |
1569 | reloc_data.got_symbol_vma = htab->sgot->output_section->vma | |
1570 | + htab->sgot->output_offset; | |
886a2506 NC |
1571 | } |
1572 | ||
34e967a5 MC |
1573 | switch (r_type) |
1574 | { | |
1575 | case R_ARC_32: | |
1576 | case R_ARC_32_ME: | |
1577 | case R_ARC_PC32: | |
1578 | case R_ARC_32_PCREL: | |
2ab2f40d | 1579 | if ((bfd_link_pic (info) || bfd_link_pie (info)) |
34e967a5 MC |
1580 | && ((r_type != R_ARC_PC32 && r_type != R_ARC_32_PCREL) |
1581 | || (h != NULL | |
1582 | && h->dynindx != -1 | |
1583 | && (!info->symbolic || !h->def_regular)))) | |
1584 | { | |
1585 | Elf_Internal_Rela outrel; | |
1586 | bfd_byte *loc; | |
1587 | bfd_boolean skip = FALSE; | |
1588 | bfd_boolean relocate = FALSE; | |
1589 | asection *sreloc = _bfd_elf_get_dynamic_reloc_section | |
1590 | (input_bfd, input_section, | |
1591 | /*RELA*/ TRUE); | |
1592 | ||
1593 | BFD_ASSERT (sreloc != NULL); | |
1594 | ||
1595 | outrel.r_offset = _bfd_elf_section_offset (output_bfd, | |
1596 | info, | |
1597 | input_section, | |
1598 | rel->r_offset); | |
1599 | if (outrel.r_offset == (bfd_vma) -1) | |
1600 | skip = TRUE; | |
1601 | ||
1602 | outrel.r_addend = rel->r_addend; | |
1603 | outrel.r_offset += (input_section->output_section->vma | |
1604 | + input_section->output_offset); | |
1605 | ||
3c8adaca CZ |
1606 | #define IS_ARC_PCREL_TYPE(TYPE) \ |
1607 | ( (TYPE == R_ARC_PC32) \ | |
1608 | || (TYPE == R_ARC_32_PCREL)) | |
34e967a5 MC |
1609 | if (skip) |
1610 | { | |
1611 | memset (&outrel, 0, sizeof outrel); | |
1612 | relocate = FALSE; | |
1613 | } | |
3c8adaca CZ |
1614 | else if (h != NULL |
1615 | && h->dynindx != -1 | |
1616 | && ((IS_ARC_PCREL_TYPE (r_type)) | |
1617 | || !(bfd_link_executable (info) | |
1618 | || SYMBOLIC_BIND (info, h)) | |
1619 | || ! h->def_regular)) | |
34e967a5 | 1620 | { |
94e5c971 | 1621 | BFD_ASSERT (h != NULL); |
34e967a5 MC |
1622 | if ((input_section->flags & SEC_ALLOC) != 0) |
1623 | relocate = FALSE; | |
1624 | else | |
1625 | relocate = TRUE; | |
94e5c971 CZ |
1626 | |
1627 | BFD_ASSERT (h->dynindx != -1); | |
34e967a5 MC |
1628 | outrel.r_info = ELF32_R_INFO (h->dynindx, r_type); |
1629 | } | |
1630 | else | |
1631 | { | |
1632 | /* Handle local symbols, they either do not have a | |
1633 | global hash table entry (h == NULL), or are | |
1634 | forced local due to a version script | |
1635 | (h->forced_local), or the third condition is | |
1636 | legacy, it appears to say something like, for | |
1637 | links where we are pre-binding the symbols, or | |
1638 | there's not an entry for this symbol in the | |
1639 | dynamic symbol table, and it's a regular symbol | |
1640 | not defined in a shared object, then treat the | |
1641 | symbol as local, resolve it now. */ | |
3c8adaca CZ |
1642 | relocate = TRUE; |
1643 | /* outrel.r_addend = 0; */ | |
1644 | outrel.r_info = ELF32_R_INFO (0, R_ARC_RELATIVE); | |
34e967a5 MC |
1645 | } |
1646 | ||
1647 | BFD_ASSERT (sreloc->contents != 0); | |
1648 | ||
1649 | loc = sreloc->contents; | |
1650 | loc += sreloc->reloc_count * sizeof (Elf32_External_Rela); | |
1651 | sreloc->reloc_count += 1; | |
1652 | ||
1653 | bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); | |
1654 | ||
1655 | if (relocate == FALSE) | |
1656 | continue; | |
1657 | } | |
1658 | break; | |
1659 | default: | |
1660 | break; | |
1661 | } | |
1662 | ||
1663 | if (is_reloc_SDA_relative (howto) | |
1664 | && (reloc_data.sdata_begin_symbol_vma_set == FALSE)) | |
886a2506 NC |
1665 | { |
1666 | (*_bfd_error_handler) | |
1667 | ("Error: Linker symbol __SDATA_BEGIN__ not found"); | |
1668 | bfd_set_error (bfd_error_bad_value); | |
1669 | return FALSE; | |
1670 | } | |
1671 | ||
1672 | DEBUG_ARC_RELOC (reloc_data); | |
34e967a5 | 1673 | |
2ab2f40d CM |
1674 | /* Make sure we have with a dynamic linker. In case of GOT and PLT |
1675 | the sym_section should point to .got or .plt respectively. */ | |
815dc1bc CZ |
1676 | if ((is_reloc_for_GOT (howto) || is_reloc_for_PLT (howto)) |
1677 | && reloc_data.sym_section == NULL) | |
2ab2f40d CM |
1678 | { |
1679 | (*_bfd_error_handler) | |
1680 | (_("GOT and PLT relocations cannot be fixed with a non dynamic linker.")); | |
1681 | bfd_set_error (bfd_error_bad_value); | |
1682 | return FALSE; | |
1683 | } | |
1684 | ||
34e967a5 | 1685 | if (arc_do_relocation (contents, reloc_data, info) != bfd_reloc_ok) |
886a2506 NC |
1686 | return FALSE; |
1687 | } | |
1688 | ||
1689 | return TRUE; | |
1690 | } | |
1691 | ||
1692 | static struct dynamic_sections | |
1693 | arc_create_dynamic_sections (bfd * abfd, struct bfd_link_info *info) | |
1694 | { | |
34e967a5 MC |
1695 | struct elf_link_hash_table *htab; |
1696 | bfd *dynobj; | |
886a2506 | 1697 | struct dynamic_sections ds = |
886a2506 | 1698 | { |
34e967a5 MC |
1699 | .initialized = FALSE, |
1700 | .sgot = NULL, | |
1701 | .srelgot = NULL, | |
1702 | .sgotplt = NULL, | |
1703 | .srelgotplt = NULL, | |
1704 | .sdyn = NULL, | |
1705 | .splt = NULL, | |
1706 | .srelplt = NULL | |
1707 | }; | |
1708 | ||
1709 | htab = elf_hash_table (info); | |
1710 | BFD_ASSERT (htab); | |
1711 | ||
1712 | /* Create dynamic sections for relocatable executables so that we | |
1713 | can copy relocations. */ | |
1714 | if (! htab->dynamic_sections_created && bfd_link_pic (info)) | |
1715 | { | |
1716 | if (! _bfd_elf_link_create_dynamic_sections (abfd, info)) | |
1717 | BFD_ASSERT (0); | |
886a2506 | 1718 | } |
886a2506 | 1719 | |
34e967a5 | 1720 | dynobj = (elf_hash_table (info))->dynobj; |
886a2506 | 1721 | |
34e967a5 | 1722 | if (dynobj) |
886a2506 | 1723 | { |
34e967a5 MC |
1724 | ds.sgot = htab->sgot; |
1725 | ds.srelgot = htab->srelgot; | |
886a2506 | 1726 | |
34e967a5 MC |
1727 | ds.sgotplt = bfd_get_section_by_name (dynobj, ".got.plt"); |
1728 | ds.srelgotplt = ds.srelplt; | |
886a2506 | 1729 | |
34e967a5 MC |
1730 | ds.splt = bfd_get_section_by_name (dynobj, ".plt"); |
1731 | ds.srelplt = bfd_get_section_by_name (dynobj, ".rela.plt"); | |
1732 | } | |
1733 | ||
1734 | if (htab->dynamic_sections_created) | |
1735 | { | |
1736 | ds.sdyn = bfd_get_section_by_name (dynobj, ".dynamic"); | |
1737 | } | |
886a2506 NC |
1738 | |
1739 | ds.initialized = TRUE; | |
1740 | ||
1741 | return ds; | |
1742 | } | |
1743 | ||
34e967a5 MC |
1744 | #define ADD_SYMBOL_REF_SEC_AND_RELOC(SECNAME, COND_FOR_RELOC, H) \ |
1745 | htab->s##SECNAME->size; \ | |
1746 | { \ | |
1747 | if (COND_FOR_RELOC) \ | |
1748 | { \ | |
1749 | htab->srel##SECNAME->size += sizeof (Elf32_External_Rela); \ | |
1750 | ARC_DEBUG ("arc_info: Added reloc space in " \ | |
1751 | #SECNAME " section at " __FILE__ \ | |
1752 | ":%d for symbol\n", \ | |
1753 | __LINE__, name_for_global_symbol (H)); \ | |
1754 | } \ | |
1755 | if (H) \ | |
1756 | if (h->dynindx == -1 && !h->forced_local) \ | |
1757 | if (! bfd_elf_link_record_dynamic_symbol (info, H)) \ | |
1758 | return FALSE; \ | |
1759 | htab->s##SECNAME->size += 4; \ | |
1760 | } | |
886a2506 NC |
1761 | |
1762 | static bfd_boolean | |
34e967a5 | 1763 | elf_arc_check_relocs (bfd * abfd, |
886a2506 | 1764 | struct bfd_link_info * info, |
34e967a5 | 1765 | asection * sec, |
886a2506 NC |
1766 | const Elf_Internal_Rela * relocs) |
1767 | { | |
34e967a5 MC |
1768 | Elf_Internal_Shdr * symtab_hdr; |
1769 | struct elf_link_hash_entry ** sym_hashes; | |
1770 | struct got_entry ** local_got_ents; | |
1771 | const Elf_Internal_Rela * rel; | |
1772 | const Elf_Internal_Rela * rel_end; | |
1773 | bfd * dynobj; | |
1774 | asection * sreloc = NULL; | |
1775 | struct elf_link_hash_table * htab = elf_hash_table (info); | |
1776 | ||
1777 | if (bfd_link_relocatable (info)) | |
1778 | return TRUE; | |
886a2506 NC |
1779 | |
1780 | dynobj = (elf_hash_table (info))->dynobj; | |
1781 | symtab_hdr = &((elf_tdata (abfd))->symtab_hdr); | |
1782 | sym_hashes = elf_sym_hashes (abfd); | |
34e967a5 | 1783 | local_got_ents = arc_get_local_got_ents (abfd); |
886a2506 NC |
1784 | |
1785 | rel_end = relocs + sec->reloc_count; | |
1786 | for (rel = relocs; rel < rel_end; rel++) | |
1787 | { | |
1788 | enum elf_arc_reloc_type r_type; | |
1789 | reloc_howto_type *howto; | |
1790 | unsigned long r_symndx; | |
1791 | struct elf_link_hash_entry *h; | |
1792 | ||
1793 | r_type = ELF32_R_TYPE (rel->r_info); | |
1794 | ||
1795 | if (r_type >= (int) R_ARC_max) | |
1796 | { | |
1797 | bfd_set_error (bfd_error_bad_value); | |
1798 | return FALSE; | |
1799 | } | |
3c8adaca | 1800 | howto = arc_elf_howto (r_type); |
34e967a5 MC |
1801 | |
1802 | if (dynobj == NULL | |
1803 | && (is_reloc_for_GOT (howto) == TRUE | |
1804 | || is_reloc_for_TLS (howto) == TRUE)) | |
1805 | { | |
1806 | dynobj = elf_hash_table (info)->dynobj = abfd; | |
1807 | if (! _bfd_elf_create_got_section (abfd, info)) | |
1808 | return FALSE; | |
1809 | } | |
886a2506 NC |
1810 | |
1811 | /* Load symbol information. */ | |
1812 | r_symndx = ELF32_R_SYM (rel->r_info); | |
1813 | if (r_symndx < symtab_hdr->sh_info) /* Is a local symbol. */ | |
1814 | h = NULL; | |
1815 | else /* Global one. */ | |
1816 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
1817 | ||
34e967a5 MC |
1818 | switch (r_type) |
1819 | { | |
1820 | case R_ARC_32: | |
1821 | case R_ARC_32_ME: | |
1822 | /* During shared library creation, these relocs should not | |
1823 | appear in a shared library (as memory will be read only | |
1824 | and the dynamic linker can not resolve these. However | |
1825 | the error should not occur for e.g. debugging or | |
1826 | non-readonly sections. */ | |
2ab2f40d | 1827 | if ((bfd_link_dll (info) && !bfd_link_pie (info)) |
34e967a5 | 1828 | && (sec->flags & SEC_ALLOC) != 0 |
3c8adaca CZ |
1829 | && (sec->flags & SEC_READONLY) != 0 |
1830 | && ((sec->flags & SEC_CODE) != 0 | |
1831 | || (sec->flags & SEC_DEBUGGING) != 0)) | |
34e967a5 MC |
1832 | { |
1833 | const char *name; | |
1834 | if (h) | |
1835 | name = h->root.root.string; | |
1836 | else | |
1837 | /* bfd_elf_sym_name (abfd, symtab_hdr, isym, NULL); */ | |
1838 | name = "UNKNOWN"; | |
1839 | (*_bfd_error_handler) | |
1840 | (_("\ | |
1841 | %B: relocation %s against `%s' can not be used when making a shared object; recompile with -fPIC"), | |
1842 | abfd, | |
1843 | arc_elf_howto (r_type)->name, | |
1844 | name); | |
1845 | bfd_set_error (bfd_error_bad_value); | |
1846 | return FALSE; | |
1847 | } | |
1848 | ||
1849 | /* In some cases we are not setting the 'non_got_ref' | |
1850 | flag, even though the relocations don't require a GOT | |
1851 | access. We should extend the testing in this area to | |
1852 | ensure that no significant cases are being missed. */ | |
1853 | if (h) | |
1854 | h->non_got_ref = 1; | |
1855 | /* FALLTHROUGH */ | |
1856 | case R_ARC_PC32: | |
1857 | case R_ARC_32_PCREL: | |
2ab2f40d | 1858 | if ((bfd_link_pic (info) || bfd_link_pie (info)) |
34e967a5 MC |
1859 | && ((r_type != R_ARC_PC32 && r_type != R_ARC_32_PCREL) |
1860 | || (h != NULL | |
1861 | && h->dynindx != -1 | |
1862 | && (!info->symbolic || !h->def_regular)))) | |
1863 | { | |
1864 | if (sreloc == NULL) | |
1865 | { | |
1866 | sreloc = _bfd_elf_make_dynamic_reloc_section (sec, dynobj, | |
1867 | 2, abfd, | |
1868 | /*rela*/ | |
1869 | TRUE); | |
1870 | ||
1871 | if (sreloc == NULL) | |
1872 | return FALSE; | |
1873 | } | |
1874 | sreloc->size += sizeof (Elf32_External_Rela); | |
1875 | ||
1876 | } | |
1877 | default: | |
1878 | break; | |
1879 | } | |
1880 | ||
886a2506 NC |
1881 | if (is_reloc_for_PLT (howto) == TRUE) |
1882 | { | |
1883 | if (h == NULL) | |
1884 | continue; | |
1885 | else | |
1886 | h->needs_plt = 1; | |
1887 | } | |
1888 | ||
1889 | if (is_reloc_for_GOT (howto) == TRUE) | |
1890 | { | |
1891 | if (h == NULL) | |
1892 | { | |
1893 | /* Local symbol. */ | |
34e967a5 MC |
1894 | if (local_got_ents[r_symndx] == NULL) |
1895 | { | |
1896 | bfd_vma offset = | |
1897 | ADD_SYMBOL_REF_SEC_AND_RELOC (got, | |
1898 | bfd_link_pic (info), | |
1899 | NULL); | |
1900 | new_got_entry_to_list (&(local_got_ents[r_symndx]), | |
33cbe6c0 | 1901 | GOT_NORMAL, offset, TLS_GOT_NONE); |
34e967a5 | 1902 | } |
886a2506 NC |
1903 | } |
1904 | else | |
1905 | { | |
1906 | /* Global symbol. */ | |
1907 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
34e967a5 MC |
1908 | if (h->got.glist == NULL) |
1909 | { | |
1910 | bfd_vma offset = | |
1911 | ADD_SYMBOL_REF_SEC_AND_RELOC (got, TRUE, h); | |
1912 | new_got_entry_to_list (&h->got.glist, | |
33cbe6c0 | 1913 | GOT_NORMAL, offset, TLS_GOT_NONE); |
34e967a5 | 1914 | } |
886a2506 NC |
1915 | } |
1916 | } | |
886a2506 | 1917 | |
34e967a5 MC |
1918 | if (is_reloc_for_TLS (howto) == TRUE) |
1919 | { | |
1920 | enum tls_type_e type = GOT_UNKNOWN; | |
886a2506 | 1921 | |
34e967a5 MC |
1922 | switch (r_type) |
1923 | { | |
1924 | case R_ARC_TLS_GD_GOT: | |
1925 | type = GOT_TLS_GD; | |
1926 | break; | |
1927 | case R_ARC_TLS_IE_GOT: | |
1928 | type = GOT_TLS_IE; | |
1929 | break; | |
1930 | default: | |
1931 | break; | |
1932 | } | |
886a2506 | 1933 | |
34e967a5 MC |
1934 | struct got_entry **list = NULL; |
1935 | if (h != NULL) | |
1936 | list = &(h->got.glist); | |
1937 | else | |
1938 | list = &(local_got_ents[r_symndx]); | |
886a2506 | 1939 | |
34e967a5 MC |
1940 | if (type != GOT_UNKNOWN && !symbol_has_entry_of_type (*list, type)) |
1941 | { | |
33cbe6c0 | 1942 | enum tls_got_entries entries = TLS_GOT_NONE; |
34e967a5 MC |
1943 | bfd_vma offset = |
1944 | ADD_SYMBOL_REF_SEC_AND_RELOC (got, TRUE, h); | |
886a2506 | 1945 | |
34e967a5 MC |
1946 | if (type == GOT_TLS_GD) |
1947 | { | |
1948 | bfd_vma ATTRIBUTE_UNUSED notneeded = | |
1949 | ADD_SYMBOL_REF_SEC_AND_RELOC (got, TRUE, h); | |
33cbe6c0 | 1950 | entries = TLS_GOT_MOD_AND_OFF; |
34e967a5 | 1951 | } |
886a2506 | 1952 | |
33cbe6c0 AB |
1953 | if (entries == TLS_GOT_NONE) |
1954 | entries = TLS_GOT_OFF; | |
886a2506 | 1955 | |
34e967a5 MC |
1956 | new_got_entry_to_list (list, type, offset, entries); |
1957 | } | |
1958 | } | |
1959 | } | |
886a2506 | 1960 | |
34e967a5 MC |
1961 | return TRUE; |
1962 | } | |
886a2506 | 1963 | |
34e967a5 | 1964 | #define ELF_DYNAMIC_INTERPRETER "/sbin/ld-uClibc.so" |
886a2506 | 1965 | |
34e967a5 MC |
1966 | static struct plt_version_t * |
1967 | arc_get_plt_version (struct bfd_link_info *info) | |
886a2506 | 1968 | { |
34e967a5 | 1969 | int i; |
886a2506 | 1970 | |
34e967a5 MC |
1971 | for (i = 0; i < 1; i++) |
1972 | { | |
1973 | ARC_DEBUG ("%d: size1 = %d, size2 = %d\n", i, | |
1974 | plt_versions[i].entry_size, | |
1975 | plt_versions[i].elem_size); | |
1976 | } | |
886a2506 | 1977 | |
34e967a5 | 1978 | if (bfd_get_mach (info->output_bfd) == bfd_mach_arc_arcv2) |
886a2506 | 1979 | { |
34e967a5 MC |
1980 | if (bfd_link_pic (info)) |
1981 | return &(plt_versions[ELF_ARCV2_PIC]); | |
1982 | else | |
1983 | return &(plt_versions[ELF_ARCV2_ABS]); | |
1984 | } | |
1985 | else | |
886a2506 | 1986 | { |
34e967a5 MC |
1987 | if (bfd_link_pic (info)) |
1988 | return &(plt_versions[ELF_ARC_PIC]); | |
1989 | else | |
1990 | return &(plt_versions[ELF_ARC_ABS]); | |
886a2506 | 1991 | } |
886a2506 NC |
1992 | } |
1993 | ||
1994 | static bfd_vma | |
1995 | add_symbol_to_plt (struct bfd_link_info *info) | |
1996 | { | |
34e967a5 | 1997 | struct elf_link_hash_table *htab = elf_hash_table (info); |
886a2506 NC |
1998 | bfd_vma ret; |
1999 | ||
34e967a5 | 2000 | struct plt_version_t *plt_data = arc_get_plt_version (info); |
886a2506 | 2001 | |
34e967a5 MC |
2002 | /* If this is the first .plt entry, make room for the special first |
2003 | entry. */ | |
2004 | if (htab->splt->size == 0) | |
2005 | htab->splt->size += plt_data->entry_size; | |
886a2506 | 2006 | |
34e967a5 MC |
2007 | ret = htab->splt->size; |
2008 | ||
2009 | htab->splt->size += plt_data->elem_size; | |
2010 | ARC_DEBUG ("PLT_SIZE = %d\n", htab->splt->size); | |
2011 | ||
2012 | htab->sgotplt->size += 4; | |
2013 | htab->srelplt->size += sizeof (Elf32_External_Rela); | |
886a2506 NC |
2014 | |
2015 | return ret; | |
2016 | } | |
2017 | ||
34e967a5 MC |
2018 | #define PLT_DO_RELOCS_FOR_ENTRY(ABFD, DS, RELOCS) \ |
2019 | plt_do_relocs_for_symbol (ABFD, DS, RELOCS, 0, 0) | |
886a2506 NC |
2020 | |
2021 | static void | |
34e967a5 MC |
2022 | plt_do_relocs_for_symbol (bfd *abfd, |
2023 | struct elf_link_hash_table *htab, | |
2024 | const struct plt_reloc *reloc, | |
886a2506 NC |
2025 | bfd_vma plt_offset, |
2026 | bfd_vma symbol_got_offset) | |
2027 | { | |
2028 | while (SYM_ONLY (reloc->symbol) != LAST_RELOC) | |
2029 | { | |
2030 | bfd_vma relocation = 0; | |
2031 | ||
2032 | switch (SYM_ONLY (reloc->symbol)) | |
2033 | { | |
2034 | case SGOT: | |
2035 | relocation = | |
34e967a5 MC |
2036 | htab->sgotplt->output_section->vma + |
2037 | htab->sgotplt->output_offset + symbol_got_offset; | |
886a2506 NC |
2038 | break; |
2039 | } | |
2040 | relocation += reloc->addend; | |
2041 | ||
34e967a5 MC |
2042 | if (IS_RELATIVE (reloc->symbol)) |
2043 | { | |
2044 | bfd_vma reloc_offset = reloc->offset; | |
2045 | reloc_offset -= (IS_INSN_32 (reloc->symbol)) ? 4 : 0; | |
2046 | reloc_offset -= (IS_INSN_24 (reloc->symbol)) ? 2 : 0; | |
886a2506 | 2047 | |
34e967a5 MC |
2048 | relocation -= htab->splt->output_section->vma |
2049 | + htab->splt->output_offset | |
2050 | + plt_offset + reloc_offset; | |
2051 | } | |
2052 | ||
2053 | /* TODO: being ME is not a property of the relocation but of the | |
2054 | section of which is applying the relocation. */ | |
1e5885b7 | 2055 | if (IS_MIDDLE_ENDIAN (reloc->symbol) && !bfd_big_endian (abfd)) |
886a2506 NC |
2056 | { |
2057 | relocation = | |
2058 | ((relocation & 0xffff0000) >> 16) | | |
2059 | ((relocation & 0xffff) << 16); | |
2060 | } | |
2061 | ||
2062 | switch (reloc->size) | |
2063 | { | |
2064 | case 32: | |
34e967a5 | 2065 | bfd_put_32 (htab->splt->output_section->owner, |
886a2506 | 2066 | relocation, |
34e967a5 | 2067 | htab->splt->contents + plt_offset + reloc->offset); |
886a2506 NC |
2068 | break; |
2069 | } | |
2070 | ||
34e967a5 | 2071 | reloc = &(reloc[1]); /* Jump to next relocation. */ |
886a2506 NC |
2072 | } |
2073 | } | |
2074 | ||
2075 | static void | |
34e967a5 MC |
2076 | relocate_plt_for_symbol (bfd *output_bfd, |
2077 | struct bfd_link_info *info, | |
886a2506 NC |
2078 | struct elf_link_hash_entry *h) |
2079 | { | |
34e967a5 MC |
2080 | struct plt_version_t *plt_data = arc_get_plt_version (info); |
2081 | struct elf_link_hash_table *htab = elf_hash_table (info); | |
886a2506 | 2082 | |
34e967a5 MC |
2083 | bfd_vma plt_index = (h->plt.offset - plt_data->entry_size) |
2084 | / plt_data->elem_size; | |
886a2506 NC |
2085 | bfd_vma got_offset = (plt_index + 3) * 4; |
2086 | ||
34e967a5 MC |
2087 | ARC_DEBUG ("arc_info: PLT_OFFSET = 0x%x, PLT_ENTRY_VMA = 0x%x, \ |
2088 | GOT_ENTRY_OFFSET = 0x%x, GOT_ENTRY_VMA = 0x%x, for symbol %s\n", | |
2089 | h->plt.offset, | |
2090 | htab->splt->output_section->vma | |
2091 | + htab->splt->output_offset | |
2092 | + h->plt.offset, | |
2093 | got_offset, | |
2094 | htab->sgotplt->output_section->vma | |
2095 | + htab->sgotplt->output_offset | |
2096 | + got_offset, | |
2097 | h->root.root.string); | |
2098 | ||
1e5885b7 CZ |
2099 | |
2100 | { | |
2101 | bfd_vma i = 0; | |
2102 | uint16_t *ptr = (uint16_t *) plt_data->elem; | |
2103 | for (i = 0; i < plt_data->elem_size/2; i++) | |
2104 | { | |
2105 | uint16_t data = ptr[i]; | |
2106 | bfd_put_16 (output_bfd, | |
2107 | (bfd_vma) data, | |
2108 | htab->splt->contents + h->plt.offset + (i*2)); | |
2109 | } | |
2110 | } | |
2111 | ||
34e967a5 MC |
2112 | plt_do_relocs_for_symbol (output_bfd, htab, |
2113 | plt_data->elem_relocs, | |
2114 | h->plt.offset, | |
886a2506 | 2115 | got_offset); |
34e967a5 MC |
2116 | |
2117 | /* Fill in the entry in the global offset table. */ | |
2118 | bfd_put_32 (output_bfd, | |
2119 | (bfd_vma) (htab->splt->output_section->vma | |
2120 | + htab->splt->output_offset), | |
2121 | htab->sgotplt->contents + got_offset); | |
2122 | ||
2123 | /* TODO: Fill in the entry in the .rela.plt section. */ | |
2124 | { | |
2125 | Elf_Internal_Rela rel; | |
2126 | bfd_byte *loc; | |
2127 | ||
2128 | rel.r_offset = (htab->sgotplt->output_section->vma | |
2129 | + htab->sgotplt->output_offset | |
2130 | + got_offset); | |
2131 | rel.r_addend = 0; | |
94e5c971 CZ |
2132 | |
2133 | BFD_ASSERT (h->dynindx != -1); | |
34e967a5 MC |
2134 | rel.r_info = ELF32_R_INFO (h->dynindx, R_ARC_JMP_SLOT); |
2135 | ||
2136 | loc = htab->srelplt->contents; | |
2137 | loc += plt_index * sizeof (Elf32_External_Rela); /* relA */ | |
2138 | bfd_elf32_swap_reloca_out (output_bfd, &rel, loc); | |
2139 | } | |
886a2506 NC |
2140 | } |
2141 | ||
2142 | static void | |
34e967a5 MC |
2143 | relocate_plt_for_entry (bfd *abfd, |
2144 | struct bfd_link_info *info) | |
886a2506 | 2145 | { |
34e967a5 MC |
2146 | struct plt_version_t *plt_data = arc_get_plt_version (info); |
2147 | struct elf_link_hash_table *htab = elf_hash_table (info); | |
886a2506 | 2148 | |
1e5885b7 CZ |
2149 | { |
2150 | bfd_vma i = 0; | |
2151 | uint16_t *ptr = (uint16_t *) plt_data->entry; | |
2152 | for (i = 0; i < plt_data->entry_size/2; i++) | |
2153 | { | |
2154 | uint16_t data = ptr[i]; | |
2155 | bfd_put_16 (abfd, | |
2156 | (bfd_vma) data, | |
2157 | htab->splt->contents + (i*2)); | |
2158 | } | |
2159 | } | |
34e967a5 | 2160 | PLT_DO_RELOCS_FOR_ENTRY (abfd, htab, plt_data->entry_relocs); |
886a2506 NC |
2161 | } |
2162 | ||
34e967a5 MC |
2163 | /* Desc : Adjust a symbol defined by a dynamic object and referenced |
2164 | by a regular object. The current definition is in some section of | |
2165 | the dynamic object, but we're not including those sections. We | |
2166 | have to change the definition to something the rest of the link can | |
886a2506 NC |
2167 | understand. */ |
2168 | ||
2169 | static bfd_boolean | |
2170 | elf_arc_adjust_dynamic_symbol (struct bfd_link_info *info, | |
2171 | struct elf_link_hash_entry *h) | |
2172 | { | |
34e967a5 | 2173 | asection *s; |
886a2506 | 2174 | bfd *dynobj = (elf_hash_table (info))->dynobj; |
34e967a5 | 2175 | struct elf_link_hash_table *htab = elf_hash_table (info); |
886a2506 | 2176 | |
34e967a5 MC |
2177 | if (h->type == STT_FUNC |
2178 | || h->type == STT_GNU_IFUNC | |
2179 | || h->needs_plt == 1) | |
886a2506 NC |
2180 | { |
2181 | if (!bfd_link_pic (info) && !h->def_dynamic && !h->ref_dynamic) | |
2182 | { | |
2183 | /* This case can occur if we saw a PLT32 reloc in an input | |
2184 | file, but the symbol was never referred to by a dynamic | |
2185 | object. In such a case, we don't actually need to build | |
2186 | a procedure linkage table, and we can just do a PC32 | |
2187 | reloc instead. */ | |
2188 | BFD_ASSERT (h->needs_plt); | |
2189 | return TRUE; | |
2190 | } | |
2191 | ||
2192 | /* Make sure this symbol is output as a dynamic symbol. */ | |
2193 | if (h->dynindx == -1 && !h->forced_local | |
2194 | && !bfd_elf_link_record_dynamic_symbol (info, h)) | |
2195 | return FALSE; | |
2196 | ||
34e967a5 MC |
2197 | if (bfd_link_pic (info) |
2198 | || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h)) | |
886a2506 NC |
2199 | { |
2200 | bfd_vma loc = add_symbol_to_plt (info); | |
2201 | ||
2202 | if (!bfd_link_pic (info) && !h->def_regular) | |
2203 | { | |
34e967a5 | 2204 | h->root.u.def.section = htab->splt; |
886a2506 NC |
2205 | h->root.u.def.value = loc; |
2206 | } | |
2207 | h->plt.offset = loc; | |
2208 | } | |
34e967a5 MC |
2209 | else |
2210 | { | |
2211 | h->plt.offset = (bfd_vma) -1; | |
2212 | h->needs_plt = 0; | |
2213 | } | |
2214 | return TRUE; | |
886a2506 | 2215 | } |
34e967a5 MC |
2216 | |
2217 | /* If this is a weak symbol, and there is a real definition, the | |
2218 | processor independent code will have arranged for us to see the | |
2219 | real definition first, and we can just use the same value. */ | |
2220 | if (h->u.weakdef != NULL) | |
886a2506 | 2221 | { |
34e967a5 MC |
2222 | BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined |
2223 | || h->u.weakdef->root.type == bfd_link_hash_defweak); | |
2224 | h->root.u.def.section = h->u.weakdef->root.u.def.section; | |
2225 | h->root.u.def.value = h->u.weakdef->root.u.def.value; | |
2226 | return TRUE; | |
886a2506 NC |
2227 | } |
2228 | ||
34e967a5 MC |
2229 | /* This is a reference to a symbol defined by a dynamic object which |
2230 | is not a function. */ | |
2231 | ||
2232 | /* If we are creating a shared library, we must presume that the | |
2233 | only references to the symbol are via the global offset table. | |
2234 | For such cases we need not do anything here; the relocations will | |
2235 | be handled correctly by relocate_section. */ | |
3c8adaca CZ |
2236 | if (!bfd_link_executable (info)) |
2237 | return TRUE; | |
2238 | ||
2239 | /* If there are no non-GOT references, we do not need a copy | |
2240 | relocation. */ | |
2241 | if (!h->non_got_ref) | |
34e967a5 MC |
2242 | return TRUE; |
2243 | ||
3c8adaca CZ |
2244 | /* If -z nocopyreloc was given, we won't generate them either. */ |
2245 | if (info->nocopyreloc) | |
2246 | { | |
2247 | h->non_got_ref = 0; | |
2248 | return TRUE; | |
2249 | } | |
2250 | ||
34e967a5 MC |
2251 | /* We must allocate the symbol in our .dynbss section, which will |
2252 | become part of the .bss section of the executable. There will be | |
2253 | an entry for this symbol in the .dynsym section. The dynamic | |
2254 | object will contain position independent code, so all references | |
2255 | from the dynamic object to this symbol will go through the global | |
2256 | offset table. The dynamic linker will use the .dynsym entry to | |
2257 | determine the address it must put in the global offset table, so | |
2258 | both the dynamic object and the regular object will refer to the | |
2259 | same memory location for the variable. */ | |
2260 | ||
3c8adaca CZ |
2261 | if (htab == NULL) |
2262 | return FALSE; | |
34e967a5 MC |
2263 | |
2264 | /* We must generate a R_ARC_COPY reloc to tell the dynamic linker to | |
2265 | copy the initial value out of the dynamic object and into the | |
2266 | runtime process image. We need to remember the offset into the | |
2267 | .rela.bss section we are going to use. */ | |
2268 | if ((h->root.u.def.section->flags & SEC_ALLOC) != 0) | |
2269 | { | |
2270 | asection *srel; | |
2271 | ||
2272 | srel = bfd_get_section_by_name (dynobj, ".rela.bss"); | |
2273 | BFD_ASSERT (srel != NULL); | |
2274 | srel->size += sizeof (Elf32_External_Rela); | |
2275 | h->needs_copy = 1; | |
2276 | } | |
2277 | ||
3c8adaca CZ |
2278 | s = bfd_get_section_by_name (dynobj, ".dynbss"); |
2279 | BFD_ASSERT (s != NULL); | |
34e967a5 | 2280 | |
3c8adaca | 2281 | return _bfd_elf_adjust_dynamic_copy (info, h, s); |
886a2506 NC |
2282 | } |
2283 | ||
2284 | /* Function : elf_arc_finish_dynamic_symbol | |
2285 | Brief : Finish up dynamic symbol handling. We set the | |
34e967a5 | 2286 | contents of various dynamic sections here. |
886a2506 | 2287 | Args : output_bfd : |
34e967a5 MC |
2288 | info : |
2289 | h : | |
2290 | sym : | |
886a2506 | 2291 | Returns : True/False as the return status. */ |
34e967a5 | 2292 | |
886a2506 NC |
2293 | static bfd_boolean |
2294 | elf_arc_finish_dynamic_symbol (bfd * output_bfd, | |
2295 | struct bfd_link_info *info, | |
2296 | struct elf_link_hash_entry *h, | |
2297 | Elf_Internal_Sym * sym) | |
2298 | { | |
34e967a5 | 2299 | if (h->plt.offset != (bfd_vma) -1) |
886a2506 | 2300 | { |
34e967a5 MC |
2301 | relocate_plt_for_symbol (output_bfd, info, h); |
2302 | ||
2303 | if (!h->def_regular) | |
886a2506 | 2304 | { |
34e967a5 MC |
2305 | /* Mark the symbol as undefined, rather than as defined in |
2306 | the .plt section. Leave the value alone. */ | |
2307 | sym->st_shndx = SHN_UNDEF; | |
886a2506 | 2308 | } |
34e967a5 MC |
2309 | } |
2310 | ||
2311 | if (h->got.glist != NULL) | |
2312 | { | |
2313 | struct got_entry *list = h->got.glist; | |
2314 | ||
2315 | /* Traverse the list of got entries for this symbol. */ | |
2316 | while (list) | |
886a2506 | 2317 | { |
34e967a5 MC |
2318 | bfd_vma got_offset = h->got.glist->offset; |
2319 | ||
2320 | if (list->type == GOT_NORMAL | |
2321 | && list->created_dyn_relocation == FALSE) | |
2322 | { | |
2323 | if (bfd_link_pic (info) | |
2324 | && (info->symbolic || h->dynindx == -1) | |
2325 | && h->def_regular) | |
2326 | { | |
2327 | ADD_RELA (output_bfd, got, got_offset, 0, R_ARC_RELATIVE, 0); | |
2328 | } | |
94e5c971 CZ |
2329 | /* Do not fully understand the side effects of this condition. |
2330 | The relocation space might still being reserved. Perhaps | |
2331 | I should clear its value. */ | |
2332 | else if (h->dynindx != -1) | |
34e967a5 MC |
2333 | { |
2334 | ADD_RELA (output_bfd, got, got_offset, h->dynindx, | |
2335 | R_ARC_GLOB_DAT, 0); | |
2336 | } | |
2337 | list->created_dyn_relocation = TRUE; | |
2338 | } | |
33cbe6c0 | 2339 | else if (list->existing_entries != TLS_GOT_NONE) |
34e967a5 MC |
2340 | { |
2341 | struct elf_link_hash_table *htab = elf_hash_table (info); | |
2342 | enum tls_got_entries e = list->existing_entries; | |
2343 | ||
2344 | BFD_ASSERT (list->type != GOT_TLS_GD | |
33cbe6c0 | 2345 | || list->existing_entries == TLS_GOT_MOD_AND_OFF); |
34e967a5 | 2346 | |
840855c5 | 2347 | bfd_vma dynindx = h->dynindx == -1 ? 0 : h->dynindx; |
33cbe6c0 | 2348 | if (e == TLS_GOT_MOD_AND_OFF || e == TLS_GOT_MOD) |
34e967a5 | 2349 | { |
840855c5 | 2350 | ADD_RELA (output_bfd, got, got_offset, dynindx, |
34e967a5 MC |
2351 | R_ARC_TLS_DTPMOD, 0); |
2352 | ARC_DEBUG ("arc_info: TLS_DYNRELOC: type = %d, \ | |
2353 | GOT_OFFSET = 0x%x, GOT_VMA = 0x%x, INDEX = %d, ADDEND = 0x%x\n", | |
2354 | list->type, | |
2355 | got_offset, | |
2356 | htab->sgot->output_section->vma | |
2357 | + htab->sgot->output_offset + got_offset, | |
840855c5 | 2358 | dynindx, 0); |
34e967a5 | 2359 | } |
33cbe6c0 | 2360 | if (e == TLS_GOT_MOD_AND_OFF || e == TLS_GOT_OFF) |
34e967a5 MC |
2361 | { |
2362 | bfd_vma addend = 0; | |
2363 | if (list->type == GOT_TLS_IE) | |
2364 | addend = bfd_get_32 (output_bfd, | |
2365 | htab->sgot->contents + got_offset); | |
2366 | ||
2367 | ADD_RELA (output_bfd, got, | |
33cbe6c0 | 2368 | got_offset + (e == TLS_GOT_MOD_AND_OFF ? 4 : 0), |
840855c5 | 2369 | dynindx, |
34e967a5 MC |
2370 | (list->type == GOT_TLS_IE ? |
2371 | R_ARC_TLS_TPOFF : R_ARC_TLS_DTPOFF), | |
2372 | addend); | |
2373 | ||
2374 | ARC_DEBUG ("arc_info: TLS_DYNRELOC: type = %d, \ | |
2375 | GOT_OFFSET = 0x%x, GOT_VMA = 0x%x, INDEX = %d, ADDEND = 0x%x\n", | |
2376 | list->type, | |
2377 | got_offset, | |
2378 | htab->sgot->output_section->vma | |
2379 | + htab->sgot->output_offset + got_offset, | |
840855c5 | 2380 | dynindx, addend); |
34e967a5 MC |
2381 | } |
2382 | } | |
2383 | ||
2384 | list = list->next; | |
886a2506 | 2385 | } |
34e967a5 MC |
2386 | |
2387 | h->got.glist = NULL; | |
2388 | } | |
2389 | ||
2390 | if (h->needs_copy) | |
2391 | { | |
2392 | bfd_vma rel_offset = (h->root.u.def.value | |
2393 | + h->root.u.def.section->output_section->vma | |
2394 | + h->root.u.def.section->output_offset); | |
2395 | ||
2396 | asection *srelbss = | |
2397 | bfd_get_section_by_name (h->root.u.def.section->owner, | |
2398 | ".rela.bss"); | |
2399 | ||
23a42089 NC |
2400 | bfd_byte * loc = srelbss->contents |
2401 | + (srelbss->reloc_count * sizeof (Elf32_External_Rela)); | |
34e967a5 MC |
2402 | srelbss->reloc_count++; |
2403 | ||
2404 | Elf_Internal_Rela rel; | |
2405 | rel.r_addend = 0; | |
2406 | rel.r_offset = rel_offset; | |
94e5c971 CZ |
2407 | |
2408 | BFD_ASSERT (h->dynindx != -1); | |
34e967a5 MC |
2409 | rel.r_info = ELF32_R_INFO (h->dynindx, R_ARC_COPY); |
2410 | ||
23a42089 | 2411 | bfd_elf32_swap_reloca_out (output_bfd, &rel, loc); |
886a2506 NC |
2412 | } |
2413 | ||
2414 | /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */ | |
2415 | if (strcmp (h->root.root.string, "_DYNAMIC") == 0 | |
2416 | || strcmp (h->root.root.string, "__DYNAMIC") == 0 | |
2417 | || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0) | |
2418 | sym->st_shndx = SHN_ABS; | |
2419 | ||
2420 | return TRUE; | |
2421 | } | |
2422 | ||
4ade44b7 | 2423 | #define GET_SYMBOL_OR_SECTION(TAG, SYMBOL, SECTION) \ |
34e967a5 MC |
2424 | case TAG: \ |
2425 | if (SYMBOL != NULL) \ | |
4ade44b7 AM |
2426 | h = elf_link_hash_lookup (elf_hash_table (info), \ |
2427 | SYMBOL, FALSE, FALSE, TRUE); \ | |
34e967a5 | 2428 | else if (SECTION != NULL) \ |
4ade44b7 | 2429 | s = bfd_get_linker_section (dynobj, SECTION); \ |
34e967a5 | 2430 | break; |
886a2506 NC |
2431 | |
2432 | /* Function : elf_arc_finish_dynamic_sections | |
2433 | Brief : Finish up the dynamic sections handling. | |
2434 | Args : output_bfd : | |
34e967a5 MC |
2435 | info : |
2436 | h : | |
2437 | sym : | |
886a2506 | 2438 | Returns : True/False as the return status. */ |
34e967a5 | 2439 | |
886a2506 | 2440 | static bfd_boolean |
34e967a5 MC |
2441 | elf_arc_finish_dynamic_sections (bfd * output_bfd, |
2442 | struct bfd_link_info *info) | |
886a2506 NC |
2443 | { |
2444 | struct dynamic_sections ds = arc_create_dynamic_sections (output_bfd, info); | |
34e967a5 | 2445 | struct elf_link_hash_table *htab = elf_hash_table (info); |
886a2506 NC |
2446 | bfd *dynobj = (elf_hash_table (info))->dynobj; |
2447 | ||
2448 | if (ds.sdyn) | |
2449 | { | |
2450 | Elf32_External_Dyn *dyncon, *dynconend; | |
2451 | ||
2452 | dyncon = (Elf32_External_Dyn *) ds.sdyn->contents; | |
2453 | dynconend = | |
34e967a5 | 2454 | (Elf32_External_Dyn *) (ds.sdyn->contents + ds.sdyn->size); |
886a2506 NC |
2455 | for (; dyncon < dynconend; dyncon++) |
2456 | { | |
2457 | Elf_Internal_Dyn internal_dyn; | |
2458 | bfd_boolean do_it = FALSE; | |
2459 | ||
2460 | struct elf_link_hash_entry *h = NULL; | |
2461 | asection *s = NULL; | |
2462 | ||
2463 | bfd_elf32_swap_dyn_in (dynobj, dyncon, &internal_dyn); | |
2464 | ||
2465 | switch (internal_dyn.d_tag) | |
2466 | { | |
4ade44b7 AM |
2467 | GET_SYMBOL_OR_SECTION (DT_INIT, "_init", NULL) |
2468 | GET_SYMBOL_OR_SECTION (DT_FINI, "_fini", NULL) | |
2469 | GET_SYMBOL_OR_SECTION (DT_PLTGOT, NULL, ".plt") | |
2470 | GET_SYMBOL_OR_SECTION (DT_JMPREL, NULL, ".rela.plt") | |
2471 | GET_SYMBOL_OR_SECTION (DT_PLTRELSZ, NULL, ".rela.plt") | |
2472 | GET_SYMBOL_OR_SECTION (DT_RELASZ, NULL, ".rela.plt") | |
2473 | GET_SYMBOL_OR_SECTION (DT_VERSYM, NULL, ".gnu.version") | |
2474 | GET_SYMBOL_OR_SECTION (DT_VERDEF, NULL, ".gnu.version_d") | |
2475 | GET_SYMBOL_OR_SECTION (DT_VERNEED, NULL, ".gnu.version_r") | |
886a2506 NC |
2476 | default: |
2477 | break; | |
2478 | } | |
2479 | ||
34e967a5 | 2480 | /* In case the dynamic symbols should be updated with a symbol. */ |
886a2506 NC |
2481 | if (h != NULL |
2482 | && (h->root.type == bfd_link_hash_defined | |
34e967a5 | 2483 | || h->root.type == bfd_link_hash_defweak)) |
886a2506 NC |
2484 | { |
2485 | asection *asec_ptr; | |
2486 | ||
2487 | internal_dyn.d_un.d_val = h->root.u.def.value; | |
2488 | asec_ptr = h->root.u.def.section; | |
2489 | if (asec_ptr->output_section != NULL) | |
2490 | { | |
2491 | internal_dyn.d_un.d_val += | |
2492 | (asec_ptr->output_section->vma + | |
2493 | asec_ptr->output_offset); | |
2494 | } | |
2495 | else | |
2496 | { | |
34e967a5 MC |
2497 | /* The symbol is imported from another shared |
2498 | library and does not apply to this one. */ | |
886a2506 NC |
2499 | internal_dyn.d_un.d_val = 0; |
2500 | } | |
2501 | do_it = TRUE; | |
2502 | } | |
2503 | else if (s != NULL) /* With a section information. */ | |
2504 | { | |
2505 | switch (internal_dyn.d_tag) | |
2506 | { | |
2507 | case DT_PLTGOT: | |
2508 | case DT_JMPREL: | |
34e967a5 MC |
2509 | case DT_VERSYM: |
2510 | case DT_VERDEF: | |
2511 | case DT_VERNEED: | |
4ade44b7 AM |
2512 | internal_dyn.d_un.d_ptr = (s->output_section->vma |
2513 | + s->output_offset); | |
886a2506 NC |
2514 | do_it = TRUE; |
2515 | break; | |
2516 | ||
2517 | case DT_PLTRELSZ: | |
2518 | internal_dyn.d_un.d_val = s->size; | |
2519 | do_it = TRUE; | |
2520 | break; | |
2521 | ||
2522 | case DT_RELASZ: | |
34e967a5 MC |
2523 | if (s != NULL) |
2524 | internal_dyn.d_un.d_val -= s->size; | |
886a2506 NC |
2525 | do_it = TRUE; |
2526 | break; | |
2527 | ||
2528 | default: | |
2529 | break; | |
2530 | } | |
2531 | } | |
2532 | ||
4ade44b7 | 2533 | if (do_it) |
886a2506 NC |
2534 | bfd_elf32_swap_dyn_out (output_bfd, &internal_dyn, dyncon); |
2535 | } | |
2536 | ||
34e967a5 | 2537 | if (htab->splt->size > 0) |
886a2506 | 2538 | { |
34e967a5 | 2539 | relocate_plt_for_entry (output_bfd, info); |
886a2506 NC |
2540 | } |
2541 | ||
34e967a5 MC |
2542 | /* TODO: Validate this. */ |
2543 | elf_section_data (htab->srelplt->output_section)->this_hdr.sh_entsize | |
2544 | = 0xc; | |
886a2506 NC |
2545 | } |
2546 | ||
2547 | /* Fill in the first three entries in the global offset table. */ | |
34e967a5 | 2548 | if (htab->sgot) |
886a2506 | 2549 | { |
3b63d2ce CM |
2550 | struct elf_link_hash_entry *h; |
2551 | h = elf_link_hash_lookup (elf_hash_table (info), "_GLOBAL_OFFSET_TABLE_", | |
2552 | FALSE, FALSE, TRUE); | |
2553 | ||
2554 | if (h != NULL && h->root.type != bfd_link_hash_undefined | |
2555 | && h->root.u.def.section != NULL) | |
886a2506 | 2556 | { |
3b63d2ce CM |
2557 | asection *sec = h->root.u.def.section; |
2558 | ||
886a2506 NC |
2559 | if (ds.sdyn == NULL) |
2560 | bfd_put_32 (output_bfd, (bfd_vma) 0, | |
3b63d2ce | 2561 | sec->contents); |
886a2506 NC |
2562 | else |
2563 | bfd_put_32 (output_bfd, | |
2564 | ds.sdyn->output_section->vma + ds.sdyn->output_offset, | |
3b63d2ce CM |
2565 | sec->contents); |
2566 | bfd_put_32 (output_bfd, (bfd_vma) 0, sec->contents + 4); | |
2567 | bfd_put_32 (output_bfd, (bfd_vma) 0, sec->contents + 8); | |
886a2506 NC |
2568 | } |
2569 | } | |
2570 | ||
886a2506 NC |
2571 | return TRUE; |
2572 | } | |
2573 | ||
34e967a5 MC |
2574 | #define ADD_DYNAMIC_SYMBOL(NAME, TAG) \ |
2575 | h = elf_link_hash_lookup (elf_hash_table (info), \ | |
2576 | NAME, FALSE, FALSE, FALSE); \ | |
2577 | if ((h != NULL && (h->ref_regular || h->def_regular))) \ | |
2578 | if (! _bfd_elf_add_dynamic_entry (info, TAG, 0)) \ | |
886a2506 NC |
2579 | return FALSE; |
2580 | ||
2581 | /* Set the sizes of the dynamic sections. */ | |
2582 | static bfd_boolean | |
34e967a5 MC |
2583 | elf_arc_size_dynamic_sections (bfd * output_bfd, |
2584 | struct bfd_link_info *info) | |
886a2506 | 2585 | { |
34e967a5 | 2586 | bfd * dynobj; |
886a2506 | 2587 | asection * s; |
34e967a5 MC |
2588 | bfd_boolean relocs_exist = FALSE; |
2589 | bfd_boolean reltext_exist = FALSE; | |
886a2506 | 2590 | struct dynamic_sections ds = arc_create_dynamic_sections (output_bfd, info); |
34e967a5 | 2591 | struct elf_link_hash_table *htab = elf_hash_table (info); |
886a2506 NC |
2592 | |
2593 | dynobj = (elf_hash_table (info))->dynobj; | |
2594 | BFD_ASSERT (dynobj != NULL); | |
2595 | ||
2596 | if ((elf_hash_table (info))->dynamic_sections_created) | |
2597 | { | |
2598 | struct elf_link_hash_entry *h; | |
2599 | ||
34e967a5 MC |
2600 | /* Set the contents of the .interp section to the |
2601 | interpreter. */ | |
886a2506 NC |
2602 | if (!bfd_link_pic (info)) |
2603 | { | |
2604 | s = bfd_get_section_by_name (dynobj, ".interp"); | |
2605 | BFD_ASSERT (s != NULL); | |
34e967a5 | 2606 | s->size = sizeof (ELF_DYNAMIC_INTERPRETER); |
886a2506 NC |
2607 | s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER; |
2608 | } | |
2609 | ||
34e967a5 MC |
2610 | /* Add some entries to the .dynamic section. We fill in some of |
2611 | the values later, in elf_bfd_final_link, but we must add the | |
2612 | entries now so that we know the final size of the .dynamic | |
2613 | section. Checking if the .init section is present. We also | |
2614 | create DT_INIT and DT_FINI entries if the init_str has been | |
2615 | changed by the user. */ | |
886a2506 NC |
2616 | ADD_DYNAMIC_SYMBOL ("init", DT_INIT); |
2617 | ADD_DYNAMIC_SYMBOL ("fini", DT_FINI); | |
2618 | } | |
2619 | else | |
2620 | { | |
34e967a5 MC |
2621 | /* We may have created entries in the .rela.got section. |
2622 | However, if we are not creating the dynamic sections, we will | |
2623 | not actually use these entries. Reset the size of .rela.got, | |
2624 | which will cause it to get stripped from the output file | |
2625 | below. */ | |
2626 | if (htab->srelgot != NULL) | |
2627 | htab->srelgot->size = 0; | |
886a2506 NC |
2628 | } |
2629 | ||
34e967a5 MC |
2630 | if (htab->splt != NULL && htab->splt->size == 0) |
2631 | htab->splt->flags |= SEC_EXCLUDE; | |
886a2506 NC |
2632 | for (s = dynobj->sections; s != NULL; s = s->next) |
2633 | { | |
34e967a5 | 2634 | if ((s->flags & SEC_LINKER_CREATED) == 0) |
886a2506 NC |
2635 | continue; |
2636 | ||
34e967a5 | 2637 | if (strncmp (s->name, ".rela", 5) == 0) |
886a2506 | 2638 | { |
34e967a5 MC |
2639 | if (s->size == 0) |
2640 | { | |
2641 | s->flags |= SEC_EXCLUDE; | |
2642 | } | |
2643 | else | |
2644 | { | |
2645 | if (strcmp (s->name, ".rela.plt") != 0) | |
2646 | { | |
2647 | const char *outname = | |
2648 | bfd_get_section_name (output_bfd, | |
2649 | htab->srelplt->output_section); | |
2650 | ||
2651 | asection *target = bfd_get_section_by_name (output_bfd, | |
2652 | outname + 4); | |
2653 | ||
2654 | relocs_exist = TRUE; | |
2655 | if (target != NULL && target->size != 0 | |
2656 | && (target->flags & SEC_READONLY) != 0 | |
2657 | && (target->flags & SEC_ALLOC) != 0) | |
2658 | reltext_exist = TRUE; | |
2659 | } | |
2660 | } | |
886a2506 | 2661 | |
34e967a5 MC |
2662 | /* We use the reloc_count field as a counter if we need to |
2663 | copy relocs into the output file. */ | |
2664 | s->reloc_count = 0; | |
886a2506 | 2665 | } |
34e967a5 MC |
2666 | |
2667 | if (strcmp (s->name, ".dynamic") == 0) | |
2668 | continue; | |
2669 | ||
2670 | if (s->size != 0) | |
2671 | s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size); | |
2672 | ||
2673 | if (s->contents == NULL && s->size != 0) | |
2674 | return FALSE; | |
886a2506 NC |
2675 | } |
2676 | ||
2677 | if (ds.sdyn) | |
2678 | { | |
34e967a5 MC |
2679 | /* TODO: Check if this is needed. */ |
2680 | if (!bfd_link_pic (info)) | |
2681 | if (!_bfd_elf_add_dynamic_entry (info, DT_DEBUG, 0)) | |
2682 | return FALSE; | |
2683 | ||
2684 | if (htab->splt && (htab->splt->flags & SEC_EXCLUDE) == 0) | |
886a2506 NC |
2685 | if (!_bfd_elf_add_dynamic_entry (info, DT_PLTGOT, 0) |
2686 | || !_bfd_elf_add_dynamic_entry (info, DT_PLTRELSZ, 0) | |
2687 | || !_bfd_elf_add_dynamic_entry (info, DT_PLTREL, DT_RELA) | |
2688 | || !_bfd_elf_add_dynamic_entry (info, DT_JMPREL, 0) | |
2689 | ) | |
2690 | return FALSE; | |
2691 | ||
2692 | if (relocs_exist == TRUE) | |
2693 | if (!_bfd_elf_add_dynamic_entry (info, DT_RELA, 0) | |
2694 | || !_bfd_elf_add_dynamic_entry (info, DT_RELASZ, 0) | |
2ab2f40d | 2695 | || !_bfd_elf_add_dynamic_entry (info, DT_RELAENT, |
886a2506 NC |
2696 | sizeof (Elf32_External_Rela)) |
2697 | ) | |
2698 | return FALSE; | |
2699 | ||
2700 | if (reltext_exist == TRUE) | |
2701 | if (!_bfd_elf_add_dynamic_entry (info, DT_TEXTREL, 0)) | |
2702 | return FALSE; | |
2703 | } | |
2704 | ||
2705 | return TRUE; | |
2706 | } | |
2707 | ||
0f7f3789 CM |
2708 | |
2709 | /* Classify dynamic relocs such that -z combreloc can reorder and combine | |
2710 | them. */ | |
2711 | static enum elf_reloc_type_class | |
2712 | elf32_arc_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED, | |
2713 | const asection *rel_sec ATTRIBUTE_UNUSED, | |
2714 | const Elf_Internal_Rela *rela) | |
2715 | { | |
2716 | switch ((int) ELF32_R_TYPE (rela->r_info)) | |
2717 | { | |
2718 | case R_ARC_RELATIVE: | |
2719 | return reloc_class_relative; | |
2720 | case R_ARC_JMP_SLOT: | |
2721 | return reloc_class_plt; | |
2722 | case R_ARC_COPY: | |
2723 | return reloc_class_copy; | |
2724 | /* TODO: Needed in future to support ifunc. */ | |
2725 | /* | |
2726 | case R_ARC_IRELATIVE: | |
2727 | return reloc_class_ifunc; | |
2728 | */ | |
2729 | default: | |
2730 | return reloc_class_normal; | |
2731 | } | |
2732 | } | |
2733 | ||
34e967a5 MC |
2734 | const struct elf_size_info arc_elf32_size_info = |
2735 | { | |
2736 | sizeof (Elf32_External_Ehdr), | |
2737 | sizeof (Elf32_External_Phdr), | |
2738 | sizeof (Elf32_External_Shdr), | |
2739 | sizeof (Elf32_External_Rel), | |
2740 | sizeof (Elf32_External_Rela), | |
2741 | sizeof (Elf32_External_Sym), | |
2742 | sizeof (Elf32_External_Dyn), | |
2743 | sizeof (Elf_External_Note), | |
2744 | 4, | |
2745 | 1, | |
2746 | 32, 2, | |
2747 | ELFCLASS32, EV_CURRENT, | |
2748 | bfd_elf32_write_out_phdrs, | |
2749 | bfd_elf32_write_shdrs_and_ehdr, | |
2750 | bfd_elf32_checksum_contents, | |
2751 | bfd_elf32_write_relocs, | |
2752 | bfd_elf32_swap_symbol_in, | |
2753 | bfd_elf32_swap_symbol_out, | |
2754 | bfd_elf32_slurp_reloc_table, | |
2755 | bfd_elf32_slurp_symbol_table, | |
2756 | bfd_elf32_swap_dyn_in, | |
2757 | bfd_elf32_swap_dyn_out, | |
2758 | bfd_elf32_swap_reloc_in, | |
2759 | bfd_elf32_swap_reloc_out, | |
2760 | bfd_elf32_swap_reloca_in, | |
2761 | bfd_elf32_swap_reloca_out | |
2762 | }; | |
2763 | ||
2764 | #define elf_backend_size_info arc_elf32_size_info | |
2765 | ||
2766 | static struct bfd_link_hash_table * | |
2767 | arc_elf_link_hash_table_create (bfd *abfd) | |
2768 | { | |
2769 | struct elf_link_hash_table *htab; | |
2770 | ||
2771 | htab = bfd_zmalloc (sizeof (*htab)); | |
2772 | if (htab == NULL) | |
2773 | return NULL; | |
2774 | ||
2775 | if (!_bfd_elf_link_hash_table_init (htab, abfd, | |
2776 | _bfd_elf_link_hash_newfunc, | |
2777 | sizeof (struct elf_link_hash_entry), | |
2778 | GENERIC_ELF_DATA)) | |
2779 | { | |
2780 | free (htab); | |
2781 | return NULL; | |
2782 | } | |
2783 | ||
2784 | htab->init_got_refcount.refcount = 0; | |
2785 | htab->init_got_refcount.glist = NULL; | |
2786 | htab->init_got_offset.offset = 0; | |
2787 | htab->init_got_offset.glist = NULL; | |
2788 | return (struct bfd_link_hash_table *) htab; | |
2789 | } | |
2790 | ||
2791 | /* Hook called by the linker routine which adds symbols from an object | |
2792 | file. */ | |
2793 | ||
2794 | static bfd_boolean | |
2795 | elf_arc_add_symbol_hook (bfd * abfd, | |
2796 | struct bfd_link_info * info, | |
2797 | Elf_Internal_Sym * sym, | |
2798 | const char ** namep ATTRIBUTE_UNUSED, | |
2799 | flagword * flagsp ATTRIBUTE_UNUSED, | |
2800 | asection ** secp ATTRIBUTE_UNUSED, | |
2801 | bfd_vma * valp ATTRIBUTE_UNUSED) | |
2802 | { | |
a43942db | 2803 | if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC |
34e967a5 MC |
2804 | && (abfd->flags & DYNAMIC) == 0 |
2805 | && bfd_get_flavour (info->output_bfd) == bfd_target_elf_flavour) | |
a43942db | 2806 | elf_tdata (info->output_bfd)->has_gnu_symbols |= elf_gnu_symbol_ifunc; |
34e967a5 MC |
2807 | |
2808 | return TRUE; | |
2809 | } | |
886a2506 | 2810 | |
6d00b590 | 2811 | #define TARGET_LITTLE_SYM arc_elf32_le_vec |
47b0e7ad | 2812 | #define TARGET_LITTLE_NAME "elf32-littlearc" |
886a2506 NC |
2813 | #define TARGET_BIG_SYM arc_elf32_be_vec |
2814 | #define TARGET_BIG_NAME "elf32-bigarc" | |
2815 | #define ELF_ARCH bfd_arch_arc | |
2816 | #define ELF_MACHINE_CODE EM_ARC_COMPACT | |
2817 | #define ELF_MACHINE_ALT1 EM_ARC_COMPACT2 | |
2818 | #define ELF_MAXPAGESIZE 0x2000 | |
2819 | ||
34e967a5 MC |
2820 | #define bfd_elf32_bfd_link_hash_table_create arc_elf_link_hash_table_create |
2821 | ||
2822 | #define bfd_elf32_bfd_merge_private_bfd_data arc_elf_merge_private_bfd_data | |
2823 | #define bfd_elf32_bfd_reloc_type_lookup arc_elf32_bfd_reloc_type_lookup | |
2824 | #define bfd_elf32_bfd_set_private_flags arc_elf_set_private_flags | |
2825 | #define bfd_elf32_bfd_print_private_bfd_data arc_elf_print_private_bfd_data | |
2826 | #define bfd_elf32_bfd_copy_private_bfd_data arc_elf_copy_private_bfd_data | |
2827 | ||
886a2506 NC |
2828 | #define elf_info_to_howto_rel arc_info_to_howto_rel |
2829 | #define elf_backend_object_p arc_elf_object_p | |
2830 | #define elf_backend_final_write_processing arc_elf_final_write_processing | |
2831 | ||
2832 | #define elf_backend_relocate_section elf_arc_relocate_section | |
2833 | #define elf_backend_check_relocs elf_arc_check_relocs | |
2834 | #define elf_backend_create_dynamic_sections _bfd_elf_create_dynamic_sections | |
2835 | ||
0f7f3789 CM |
2836 | #define elf_backend_reloc_type_class elf32_arc_reloc_type_class |
2837 | ||
886a2506 NC |
2838 | #define elf_backend_adjust_dynamic_symbol elf_arc_adjust_dynamic_symbol |
2839 | #define elf_backend_finish_dynamic_symbol elf_arc_finish_dynamic_symbol | |
2840 | ||
2841 | #define elf_backend_finish_dynamic_sections elf_arc_finish_dynamic_sections | |
2842 | #define elf_backend_size_dynamic_sections elf_arc_size_dynamic_sections | |
34e967a5 | 2843 | #define elf_backend_add_symbol_hook elf_arc_add_symbol_hook |
886a2506 NC |
2844 | |
2845 | #define elf_backend_can_gc_sections 1 | |
2846 | #define elf_backend_want_got_plt 1 | |
2847 | #define elf_backend_plt_readonly 1 | |
34e967a5 | 2848 | #define elf_backend_rela_plts_and_copies_p 1 |
886a2506 NC |
2849 | #define elf_backend_want_plt_sym 0 |
2850 | #define elf_backend_got_header_size 12 | |
2851 | ||
2852 | #define elf_backend_may_use_rel_p 0 | |
2853 | #define elf_backend_may_use_rela_p 1 | |
2854 | #define elf_backend_default_use_rela_p 1 | |
252b5132 | 2855 | |
3c8adaca CZ |
2856 | #define elf_backend_default_execstack 0 |
2857 | ||
252b5132 | 2858 | #include "elf32-target.h" |