Commit | Line | Data |
---|---|---|
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; | |
624 | case EF_ARC_CPU_ARCV2HS: | |
625 | case EF_ARC_CPU_ARCV2EM: | |
626 | mach = bfd_mach_arc_arcv2; | |
627 | break; | |
628 | default: | |
629 | mach = (e_machine == EM_ARC_COMPACT) ? | |
630 | bfd_mach_arc_arc700 : bfd_mach_arc_arcv2; | |
631 | break; | |
632 | } | |
633 | } | |
634 | else | |
635 | { | |
636 | if (e_machine == EM_ARC) | |
637 | { | |
638 | (*_bfd_error_handler) | |
639 | (_("Error: The ARC4 architecture is no longer supported.\n")); | |
640 | return FALSE; | |
641 | } | |
642 | else | |
643 | { | |
644 | (*_bfd_error_handler) | |
645 | (_("Warning: unset or old architecture flags. \n" | |
646 | " Use default machine.\n")); | |
0d2bcfaf | 647 | } |
252b5132 | 648 | } |
886a2506 | 649 | |
0d2bcfaf | 650 | return bfd_default_set_arch_mach (abfd, bfd_arch_arc, mach); |
252b5132 RH |
651 | } |
652 | ||
653 | /* The final processing done just before writing out an ARC ELF object file. | |
654 | This gets the ARC architecture right based on the machine number. */ | |
655 | ||
656 | static void | |
34e967a5 MC |
657 | arc_elf_final_write_processing (bfd * abfd, |
658 | bfd_boolean linker ATTRIBUTE_UNUSED) | |
252b5132 | 659 | { |
886a2506 | 660 | unsigned long emf; |
252b5132 | 661 | |
0d2bcfaf | 662 | switch (bfd_get_mach (abfd)) |
252b5132 | 663 | { |
886a2506 | 664 | case bfd_mach_arc_arc600: |
886a2506 | 665 | emf = EM_ARC_COMPACT; |
0d2bcfaf | 666 | break; |
886a2506 | 667 | case bfd_mach_arc_arc601: |
886a2506 | 668 | emf = EM_ARC_COMPACT; |
0d2bcfaf | 669 | break; |
886a2506 | 670 | case bfd_mach_arc_arc700: |
886a2506 | 671 | emf = EM_ARC_COMPACT; |
0d2bcfaf | 672 | break; |
886a2506 | 673 | case bfd_mach_arc_arcv2: |
886a2506 | 674 | emf = EM_ARC_COMPACT2; |
0d2bcfaf | 675 | break; |
886a2506 | 676 | default: |
3c8adaca | 677 | goto DO_NOTHING; |
252b5132 | 678 | } |
34e967a5 | 679 | |
886a2506 | 680 | elf_elfheader (abfd)->e_machine = emf; |
7e458899 | 681 | |
886a2506 NC |
682 | /* Record whatever is the current syscall ABI version. */ |
683 | elf_elfheader (abfd)->e_flags |= E_ARC_OSABI_CURRENT; | |
3c8adaca CZ |
684 | |
685 | DO_NOTHING: | |
686 | return; | |
252b5132 RH |
687 | } |
688 | ||
886a2506 NC |
689 | #define BFD_DEBUG_PIC(...) |
690 | ||
691 | struct arc_relocation_data | |
692 | { | |
094fb063 CZ |
693 | bfd_signed_vma reloc_offset; |
694 | bfd_signed_vma reloc_addend; | |
695 | bfd_signed_vma got_offset_value; | |
886a2506 | 696 | |
094fb063 | 697 | bfd_signed_vma sym_value; |
886a2506 NC |
698 | asection * sym_section; |
699 | ||
700 | reloc_howto_type *howto; | |
701 | ||
702 | asection * input_section; | |
703 | ||
094fb063 | 704 | bfd_signed_vma sdata_begin_symbol_vma; |
886a2506 | 705 | bfd_boolean sdata_begin_symbol_vma_set; |
094fb063 | 706 | bfd_signed_vma got_symbol_vma; |
886a2506 NC |
707 | |
708 | bfd_boolean should_relocate; | |
4b0c052e AB |
709 | |
710 | const char * symbol_name; | |
886a2506 NC |
711 | }; |
712 | ||
713 | static void | |
714 | debug_arc_reloc (struct arc_relocation_data reloc_data) | |
715 | { | |
34e967a5 | 716 | PR_DEBUG ("Reloc type=%s, should_relocate = %s\n", |
886a2506 NC |
717 | reloc_data.howto->name, |
718 | reloc_data.should_relocate ? "true" : "false"); | |
34e967a5 | 719 | PR_DEBUG (" offset = 0x%x, addend = 0x%x\n", |
886a2506 NC |
720 | (unsigned int) reloc_data.reloc_offset, |
721 | (unsigned int) reloc_data.reloc_addend); | |
34e967a5 MC |
722 | PR_DEBUG (" Symbol:\n"); |
723 | PR_DEBUG (" value = 0x%08x\n", | |
886a2506 NC |
724 | (unsigned int) reloc_data.sym_value); |
725 | if (reloc_data.sym_section != NULL) | |
726 | { | |
3c8adaca | 727 | PR_DEBUG (" Symbol Section:\n"); |
34e967a5 MC |
728 | PR_DEBUG ( |
729 | " section name = %s, output_offset 0x%08x", | |
886a2506 | 730 | reloc_data.sym_section->name, |
34e967a5 MC |
731 | (unsigned int) reloc_data.sym_section->output_offset); |
732 | if (reloc_data.sym_section->output_section != NULL) | |
733 | { | |
734 | PR_DEBUG ( | |
735 | ", output_section->vma = 0x%08x", | |
736 | ((unsigned int) reloc_data.sym_section->output_section->vma)); | |
737 | } | |
34e967a5 | 738 | PR_DEBUG ( "\n"); |
3c8adaca | 739 | PR_DEBUG (" file: %s\n", reloc_data.sym_section->owner->filename); |
886a2506 NC |
740 | } |
741 | else | |
34e967a5 MC |
742 | { |
743 | PR_DEBUG ( " symbol section is NULL\n"); | |
744 | } | |
886a2506 | 745 | |
34e967a5 | 746 | PR_DEBUG ( " Input_section:\n"); |
886a2506 NC |
747 | if (reloc_data.input_section != NULL) |
748 | { | |
34e967a5 | 749 | PR_DEBUG ( |
886a2506 NC |
750 | " section name = %s, output_offset 0x%08x, output_section->vma = 0x%08x\n", |
751 | reloc_data.input_section->name, | |
752 | (unsigned int) reloc_data.input_section->output_offset, | |
753 | (unsigned int) reloc_data.input_section->output_section->vma); | |
34e967a5 | 754 | PR_DEBUG ( " changed_address = 0x%08x\n", |
886a2506 NC |
755 | (unsigned int) (reloc_data.input_section->output_section->vma + |
756 | reloc_data.input_section->output_offset + | |
757 | reloc_data.reloc_offset)); | |
3c8adaca | 758 | PR_DEBUG (" file: %s\n", reloc_data.input_section->owner->filename); |
886a2506 NC |
759 | } |
760 | else | |
34e967a5 MC |
761 | { |
762 | PR_DEBUG ( " input section is NULL\n"); | |
763 | } | |
886a2506 NC |
764 | } |
765 | ||
72f3b6aa CZ |
766 | static bfd_vma |
767 | middle_endian_convert (bfd_vma insn, bfd_boolean do_it) | |
6f4b1afc | 768 | { |
72f3b6aa CZ |
769 | if (do_it) |
770 | { | |
771 | insn = | |
772 | ((insn & 0xffff0000) >> 16) | | |
773 | ((insn & 0xffff) << 16); | |
774 | } | |
775 | return insn; | |
6f4b1afc CM |
776 | } |
777 | ||
4b0c052e AB |
778 | /* This function is called for relocations that are otherwise marked as NOT |
779 | requiring overflow checks. In here we perform non-standard checks of | |
780 | the relocation value. */ | |
781 | ||
782 | static inline bfd_reloc_status_type | |
783 | arc_special_overflow_checks (const struct arc_relocation_data reloc_data, | |
784 | bfd_signed_vma relocation, | |
785 | struct bfd_link_info *info ATTRIBUTE_UNUSED) | |
786 | { | |
787 | switch (reloc_data.howto->type) | |
788 | { | |
789 | case R_ARC_NPS_CMEM16: | |
790 | if (((relocation >> 16) & 0xffff) != NPS_CMEM_HIGH_VALUE) | |
791 | { | |
792 | if (reloc_data.reloc_addend == 0) | |
793 | (*_bfd_error_handler) | |
794 | (_("%B(%A+0x%lx): CMEM relocation to `%s' is invalid, " | |
795 | "16 MSB should be 0x%04x (value is 0x%lx)"), | |
796 | reloc_data.input_section->owner, | |
797 | reloc_data.input_section, | |
798 | reloc_data.reloc_offset, | |
799 | reloc_data.symbol_name, | |
800 | NPS_CMEM_HIGH_VALUE, | |
801 | (relocation)); | |
802 | else | |
803 | (*_bfd_error_handler) | |
804 | (_("%B(%A+0x%lx): CMEM relocation to `%s+0x%lx' is invalid, " | |
805 | "16 MSB should be 0x%04x (value is 0x%lx)"), | |
806 | reloc_data.input_section->owner, | |
807 | reloc_data.input_section, | |
808 | reloc_data.reloc_offset, | |
809 | reloc_data.symbol_name, | |
810 | reloc_data.reloc_addend, | |
811 | NPS_CMEM_HIGH_VALUE, | |
812 | (relocation)); | |
813 | return bfd_reloc_overflow; | |
814 | } | |
815 | break; | |
816 | ||
817 | default: | |
818 | break; | |
819 | } | |
820 | ||
821 | return bfd_reloc_ok; | |
822 | } | |
823 | ||
72f3b6aa CZ |
824 | #define ME(reloc) (reloc) |
825 | ||
826 | #define IS_ME(FORMULA,BFD) ((strstr (FORMULA, "ME") != NULL) \ | |
827 | && (!bfd_big_endian (BFD))) | |
828 | ||
094fb063 | 829 | #define S ((bfd_signed_vma) (reloc_data.sym_value \ |
34e967a5 MC |
830 | + (reloc_data.sym_section->output_section != NULL ? \ |
831 | (reloc_data.sym_section->output_offset \ | |
094fb063 CZ |
832 | + reloc_data.sym_section->output_section->vma) : 0))) |
833 | #define L ((bfd_signed_vma) (reloc_data.sym_value \ | |
34e967a5 MC |
834 | + (reloc_data.sym_section->output_section != NULL ? \ |
835 | (reloc_data.sym_section->output_offset \ | |
094fb063 | 836 | + reloc_data.sym_section->output_section->vma) : 0))) |
886a2506 NC |
837 | #define A (reloc_data.reloc_addend) |
838 | #define B (0) | |
839 | #define G (reloc_data.got_offset_value) | |
34e967a5 MC |
840 | #define GOT (reloc_data.got_symbol_vma) |
841 | #define GOT_BEGIN (htab->sgot->output_section->vma) | |
842 | ||
886a2506 | 843 | #define MES (0) |
34e967a5 MC |
844 | /* P: relative offset to PCL The offset should be to the |
845 | current location aligned to 32 bits. */ | |
094fb063 | 846 | #define P ((bfd_signed_vma) ( \ |
34e967a5 MC |
847 | ( \ |
848 | (reloc_data.input_section->output_section != NULL ? \ | |
849 | reloc_data.input_section->output_section->vma : 0) \ | |
850 | + reloc_data.input_section->output_offset \ | |
094fb063 CZ |
851 | + (reloc_data.reloc_offset - (bitsize >= 32 ? 4 : 0))) \ |
852 | & ~0x3)) | |
853 | #define PDATA ((bfd_signed_vma) ( \ | |
6f4b1afc CM |
854 | (reloc_data.input_section->output_section->vma \ |
855 | + reloc_data.input_section->output_offset \ | |
094fb063 | 856 | + (reloc_data.reloc_offset)))) |
2ab2f40d CM |
857 | #define SECTSTART (bfd_signed_vma) (reloc_data.sym_section->output_section->vma \ |
858 | + reloc_data.sym_section->output_offset) | |
859 | ||
094fb063 CZ |
860 | #define _SDA_BASE_ (bfd_signed_vma) (reloc_data.sdata_begin_symbol_vma) |
861 | #define TLS_REL (bfd_signed_vma) \ | |
862 | ((elf_hash_table (info))->tls_sec->output_section->vma) | |
34e967a5 MC |
863 | #define TLS_TBSS (8) |
864 | #define TCB_SIZE (8) | |
865 | ||
886a2506 NC |
866 | #define none (0) |
867 | ||
094fb063 | 868 | #define PRINT_DEBUG_RELOC_INFO_BEFORE(FORMULA, TYPE) \ |
34e967a5 MC |
869 | {\ |
870 | asection *sym_section = reloc_data.sym_section; \ | |
871 | asection *input_section = reloc_data.input_section; \ | |
094fb063 CZ |
872 | ARC_DEBUG ("RELOC_TYPE = " TYPE "\n"); \ |
873 | ARC_DEBUG ("FORMULA = " FORMULA "\n"); \ | |
34e967a5 MC |
874 | ARC_DEBUG ("S = 0x%x\n", S); \ |
875 | ARC_DEBUG ("A = 0x%x\n", A); \ | |
876 | ARC_DEBUG ("L = 0x%x\n", L); \ | |
877 | if (sym_section->output_section != NULL) \ | |
878 | { \ | |
879 | ARC_DEBUG ("symbol_section->vma = 0x%x\n", \ | |
880 | sym_section->output_section->vma + sym_section->output_offset); \ | |
881 | } \ | |
882 | else \ | |
883 | { \ | |
884 | ARC_DEBUG ("symbol_section->vma = NULL\n"); \ | |
885 | } \ | |
886 | if (input_section->output_section != NULL) \ | |
887 | { \ | |
888 | ARC_DEBUG ("symbol_section->vma = 0x%x\n", \ | |
889 | input_section->output_section->vma + input_section->output_offset); \ | |
890 | } \ | |
891 | else \ | |
892 | { \ | |
893 | ARC_DEBUG ("symbol_section->vma = NULL\n"); \ | |
894 | } \ | |
895 | ARC_DEBUG ("PCL = 0x%x\n", P); \ | |
896 | ARC_DEBUG ("P = 0x%x\n", P); \ | |
897 | ARC_DEBUG ("G = 0x%x\n", G); \ | |
898 | ARC_DEBUG ("SDA_OFFSET = 0x%x\n", _SDA_BASE_); \ | |
899 | ARC_DEBUG ("SDA_SET = %d\n", reloc_data.sdata_begin_symbol_vma_set); \ | |
900 | ARC_DEBUG ("GOT_OFFSET = 0x%x\n", GOT); \ | |
901 | ARC_DEBUG ("relocation = 0x%08x\n", relocation); \ | |
902 | ARC_DEBUG ("before = 0x%08x\n", (unsigned int) insn); \ | |
903 | ARC_DEBUG ("data = 0x%08x (%u) (%d)\n", (unsigned int) relocation, (unsigned int) relocation, (int) relocation); \ | |
904 | } | |
905 | ||
906 | #define PRINT_DEBUG_RELOC_INFO_AFTER \ | |
907 | { \ | |
908 | ARC_DEBUG ("after = 0x%08x\n", (unsigned int) insn); \ | |
909 | } | |
910 | ||
886a2506 NC |
911 | #define ARC_RELOC_HOWTO(TYPE, VALUE, SIZE, BITSIZE, RELOC_FUNCTION, OVERFLOW, FORMULA) \ |
912 | case R_##TYPE: \ | |
913 | { \ | |
094fb063 | 914 | bfd_signed_vma bitsize ATTRIBUTE_UNUSED = BITSIZE; \ |
886a2506 | 915 | relocation = FORMULA ; \ |
094fb063 | 916 | PRINT_DEBUG_RELOC_INFO_BEFORE (#FORMULA, #TYPE); \ |
72f3b6aa | 917 | insn = middle_endian_convert (insn, IS_ME (#FORMULA, abfd)); \ |
094fb063 | 918 | insn = (* get_replace_function (abfd, TYPE)) (insn, relocation); \ |
72f3b6aa | 919 | insn = middle_endian_convert (insn, IS_ME (#FORMULA, abfd)); \ |
34e967a5 | 920 | PRINT_DEBUG_RELOC_INFO_AFTER \ |
886a2506 NC |
921 | } \ |
922 | break; | |
923 | ||
924 | static bfd_reloc_status_type | |
34e967a5 MC |
925 | arc_do_relocation (bfd_byte * contents, |
926 | struct arc_relocation_data reloc_data, | |
927 | struct bfd_link_info *info) | |
886a2506 | 928 | { |
094fb063 | 929 | bfd_signed_vma relocation = 0; |
886a2506 NC |
930 | bfd_vma insn; |
931 | bfd_vma orig_insn ATTRIBUTE_UNUSED; | |
72f3b6aa | 932 | bfd * abfd = reloc_data.input_section->owner; |
34e967a5 | 933 | struct elf_link_hash_table *htab ATTRIBUTE_UNUSED = elf_hash_table (info); |
4b0c052e | 934 | bfd_reloc_status_type flag; |
886a2506 NC |
935 | |
936 | if (reloc_data.should_relocate == FALSE) | |
34e967a5 | 937 | return bfd_reloc_ok; |
886a2506 NC |
938 | |
939 | switch (reloc_data.howto->size) | |
940 | { | |
941 | case 2: | |
72f3b6aa | 942 | insn = arc_bfd_get_32 (abfd, |
886a2506 NC |
943 | contents + reloc_data.reloc_offset, |
944 | reloc_data.input_section); | |
945 | break; | |
946 | case 1: | |
72f3b6aa CZ |
947 | insn = arc_bfd_get_16 (abfd, |
948 | contents + reloc_data.reloc_offset, | |
949 | reloc_data.input_section); | |
950 | break; | |
886a2506 | 951 | case 0: |
72f3b6aa | 952 | insn = arc_bfd_get_8 (abfd, |
886a2506 NC |
953 | contents + reloc_data.reloc_offset, |
954 | reloc_data.input_section); | |
955 | break; | |
956 | default: | |
957 | insn = 0; | |
958 | BFD_ASSERT (0); | |
959 | break; | |
960 | } | |
961 | ||
962 | orig_insn = insn; | |
963 | ||
964 | switch (reloc_data.howto->type) | |
965 | { | |
34e967a5 | 966 | #include "elf/arc-reloc.def" |
886a2506 NC |
967 | |
968 | default: | |
969 | BFD_ASSERT (0); | |
970 | break; | |
971 | } | |
972 | ||
973 | /* Check for relocation overflow. */ | |
974 | if (reloc_data.howto->complain_on_overflow != complain_overflow_dont) | |
4b0c052e AB |
975 | flag = bfd_check_overflow (reloc_data.howto->complain_on_overflow, |
976 | reloc_data.howto->bitsize, | |
977 | reloc_data.howto->rightshift, | |
978 | bfd_arch_bits_per_address (abfd), | |
979 | relocation); | |
980 | else | |
981 | flag = arc_special_overflow_checks (reloc_data, relocation, info); | |
886a2506 | 982 | |
34e967a5 | 983 | #undef DEBUG_ARC_RELOC |
886a2506 | 984 | #define DEBUG_ARC_RELOC(A) debug_arc_reloc (A) |
4b0c052e AB |
985 | if (flag != bfd_reloc_ok) |
986 | { | |
987 | PR_DEBUG ( "Relocation overflows !!!!\n"); | |
886a2506 | 988 | |
4b0c052e | 989 | DEBUG_ARC_RELOC (reloc_data); |
886a2506 | 990 | |
4b0c052e AB |
991 | PR_DEBUG ( |
992 | "Relocation value = signed -> %d, unsigned -> %u" | |
993 | ", hex -> (0x%08x)\n", | |
994 | (int) relocation, | |
995 | (unsigned int) relocation, | |
996 | (unsigned int) relocation); | |
997 | return flag; | |
886a2506 | 998 | } |
34e967a5 | 999 | #undef DEBUG_ARC_RELOC |
886a2506 NC |
1000 | #define DEBUG_ARC_RELOC(A) |
1001 | ||
4b0c052e | 1002 | /* Write updated instruction back to memory. */ |
886a2506 NC |
1003 | switch (reloc_data.howto->size) |
1004 | { | |
1005 | case 2: | |
72f3b6aa | 1006 | arc_bfd_put_32 (abfd, insn, |
886a2506 NC |
1007 | contents + reloc_data.reloc_offset, |
1008 | reloc_data.input_section); | |
1009 | break; | |
1010 | case 1: | |
72f3b6aa CZ |
1011 | arc_bfd_put_16 (abfd, insn, |
1012 | contents + reloc_data.reloc_offset, | |
1013 | reloc_data.input_section); | |
1014 | break; | |
886a2506 | 1015 | case 0: |
72f3b6aa | 1016 | arc_bfd_put_8 (abfd, insn, |
886a2506 NC |
1017 | contents + reloc_data.reloc_offset, |
1018 | reloc_data.input_section); | |
1019 | break; | |
1020 | default: | |
1021 | ARC_DEBUG ("size = %d\n", reloc_data.howto->size); | |
1022 | BFD_ASSERT (0); | |
1023 | break; | |
1024 | } | |
1025 | ||
1026 | return bfd_reloc_ok; | |
1027 | } | |
1028 | #undef S | |
1029 | #undef A | |
1030 | #undef B | |
1031 | #undef G | |
1032 | #undef GOT | |
1033 | #undef L | |
1034 | #undef MES | |
1035 | #undef P | |
1036 | #undef SECTSTAR | |
1037 | #undef SECTSTART | |
1038 | #undef _SDA_BASE_ | |
1039 | #undef none | |
1040 | ||
1041 | #undef ARC_RELOC_HOWTO | |
1042 | ||
34e967a5 MC |
1043 | static struct got_entry ** |
1044 | arc_get_local_got_ents (bfd * abfd) | |
886a2506 | 1045 | { |
34e967a5 | 1046 | static struct got_entry **local_got_ents = NULL; |
886a2506 | 1047 | |
34e967a5 | 1048 | if (local_got_ents == NULL) |
886a2506 NC |
1049 | { |
1050 | size_t size; | |
886a2506 NC |
1051 | Elf_Internal_Shdr *symtab_hdr = &((elf_tdata (abfd))->symtab_hdr); |
1052 | ||
1053 | size = symtab_hdr->sh_info * sizeof (bfd_vma); | |
34e967a5 MC |
1054 | local_got_ents = (struct got_entry **) |
1055 | bfd_alloc (abfd, sizeof(struct got_entry *) * size); | |
1056 | if (local_got_ents == NULL) | |
886a2506 | 1057 | return FALSE; |
34e967a5 MC |
1058 | |
1059 | memset (local_got_ents, 0, sizeof(struct got_entry *) * size); | |
1060 | elf_local_got_ents (abfd) = local_got_ents; | |
886a2506 NC |
1061 | } |
1062 | ||
34e967a5 | 1063 | return local_got_ents; |
886a2506 NC |
1064 | } |
1065 | ||
886a2506 NC |
1066 | /* Relocate an arc ELF section. |
1067 | Function : elf_arc_relocate_section | |
1068 | Brief : Relocate an arc section, by handling all the relocations | |
34e967a5 | 1069 | appearing in that section. |
886a2506 | 1070 | Args : output_bfd : The bfd being written to. |
34e967a5 MC |
1071 | info : Link information. |
1072 | input_bfd : The input bfd. | |
1073 | input_section : The section being relocated. | |
1074 | contents : contents of the section being relocated. | |
1075 | relocs : List of relocations in the section. | |
1076 | local_syms : is a pointer to the swapped in local symbols. | |
1077 | local_section : is an array giving the section in the input file | |
1078 | corresponding to the st_shndx field of each | |
1079 | local symbol. */ | |
886a2506 | 1080 | static bfd_boolean |
34e967a5 | 1081 | elf_arc_relocate_section (bfd * output_bfd, |
886a2506 | 1082 | struct bfd_link_info * info, |
34e967a5 MC |
1083 | bfd * input_bfd, |
1084 | asection * input_section, | |
1085 | bfd_byte * contents, | |
886a2506 NC |
1086 | Elf_Internal_Rela * relocs, |
1087 | Elf_Internal_Sym * local_syms, | |
34e967a5 | 1088 | asection ** local_sections) |
886a2506 | 1089 | { |
34e967a5 | 1090 | Elf_Internal_Shdr * symtab_hdr; |
886a2506 | 1091 | struct elf_link_hash_entry ** sym_hashes; |
34e967a5 MC |
1092 | struct got_entry ** local_got_ents; |
1093 | Elf_Internal_Rela * rel; | |
3c8adaca | 1094 | Elf_Internal_Rela * wrel; |
34e967a5 MC |
1095 | Elf_Internal_Rela * relend; |
1096 | struct elf_link_hash_table *htab = elf_hash_table (info); | |
886a2506 NC |
1097 | |
1098 | symtab_hdr = &((elf_tdata (input_bfd))->symtab_hdr); | |
1099 | sym_hashes = elf_sym_hashes (input_bfd); | |
1100 | ||
3c8adaca | 1101 | rel = wrel = relocs; |
886a2506 | 1102 | relend = relocs + input_section->reloc_count; |
3c8adaca | 1103 | for (; rel < relend; wrel++, rel++) |
886a2506 NC |
1104 | { |
1105 | enum elf_arc_reloc_type r_type; | |
34e967a5 MC |
1106 | reloc_howto_type * howto; |
1107 | unsigned long r_symndx; | |
886a2506 | 1108 | struct elf_link_hash_entry * h; |
34e967a5 MC |
1109 | Elf_Internal_Sym * sym; |
1110 | asection * sec; | |
1111 | struct elf_link_hash_entry *h2; | |
886a2506 NC |
1112 | |
1113 | struct arc_relocation_data reloc_data = | |
1114 | { | |
34e967a5 MC |
1115 | .reloc_offset = 0, |
1116 | .reloc_addend = 0, | |
1117 | .got_offset_value = 0, | |
1118 | .sym_value = 0, | |
1119 | .sym_section = NULL, | |
1120 | .howto = NULL, | |
1121 | .input_section = NULL, | |
1122 | .sdata_begin_symbol_vma = 0, | |
1123 | .sdata_begin_symbol_vma_set = FALSE, | |
1124 | .got_symbol_vma = 0, | |
1125 | .should_relocate = FALSE | |
886a2506 NC |
1126 | }; |
1127 | ||
34e967a5 MC |
1128 | r_type = ELF32_R_TYPE (rel->r_info); |
1129 | ||
1130 | if (r_type >= (int) R_ARC_max) | |
1131 | { | |
1132 | bfd_set_error (bfd_error_bad_value); | |
1133 | return FALSE; | |
1134 | } | |
3c8adaca | 1135 | howto = arc_elf_howto (r_type); |
34e967a5 MC |
1136 | |
1137 | r_symndx = ELF32_R_SYM (rel->r_info); | |
1138 | ||
1139 | /* If we are generating another .o file and the symbol in not | |
1140 | local, skip this relocation. */ | |
1141 | if (bfd_link_relocatable (info)) | |
1142 | { | |
1143 | /* This is a relocateable link. We don't have to change | |
1144 | anything, unless the reloc is against a section symbol, | |
1145 | in which case we have to adjust according to where the | |
1146 | section symbol winds up in the output section. */ | |
1147 | ||
1148 | /* Checks if this is a local symbol and thus the reloc | |
1149 | might (will??) be against a section symbol. */ | |
1150 | if (r_symndx < symtab_hdr->sh_info) | |
1151 | { | |
1152 | sym = local_syms + r_symndx; | |
1153 | if (ELF_ST_TYPE (sym->st_info) == STT_SECTION) | |
1154 | { | |
1155 | sec = local_sections[r_symndx]; | |
1156 | ||
1157 | /* for RELA relocs.Just adjust the addend | |
1158 | value in the relocation entry. */ | |
1159 | rel->r_addend += sec->output_offset + sym->st_value; | |
1160 | ||
1161 | BFD_DEBUG_PIC ( | |
1162 | PR_DEBUG ("local symbols reloc " | |
1163 | "(section=%d %s) seen in %s\n", | |
1164 | r_symndx, | |
1165 | local_sections[r_symndx]->name, | |
1166 | __PRETTY_FUNCTION__) | |
1167 | ); | |
1168 | } | |
1169 | } | |
34e967a5 | 1170 | } |
886a2506 NC |
1171 | |
1172 | h2 = elf_link_hash_lookup (elf_hash_table (info), "__SDATA_BEGIN__", | |
1173 | FALSE, FALSE, TRUE); | |
1174 | ||
1175 | if (reloc_data.sdata_begin_symbol_vma_set == FALSE | |
34e967a5 MC |
1176 | && h2 != NULL && h2->root.type != bfd_link_hash_undefined |
1177 | && h2->root.u.def.section->output_section != NULL) | |
1178 | /* TODO: Verify this condition. */ | |
886a2506 NC |
1179 | { |
1180 | reloc_data.sdata_begin_symbol_vma = | |
1181 | (h2->root.u.def.value + | |
1182 | h2->root.u.def.section->output_section->vma); | |
1183 | reloc_data.sdata_begin_symbol_vma_set = TRUE; | |
1184 | } | |
1185 | ||
886a2506 NC |
1186 | reloc_data.input_section = input_section; |
1187 | reloc_data.howto = howto; | |
1188 | reloc_data.reloc_offset = rel->r_offset; | |
1189 | reloc_data.reloc_addend = rel->r_addend; | |
1190 | ||
886a2506 NC |
1191 | /* This is a final link. */ |
1192 | h = NULL; | |
1193 | sym = NULL; | |
1194 | sec = NULL; | |
1195 | ||
1196 | if (r_symndx < symtab_hdr->sh_info) /* A local symbol. */ | |
1197 | { | |
1198 | sym = local_syms + r_symndx; | |
1199 | sec = local_sections[r_symndx]; | |
3c8adaca CZ |
1200 | } |
1201 | else | |
1202 | { | |
1203 | /* TODO: This code is repeated from below. We should | |
1204 | clean it and remove duplications. | |
1205 | Sec is used check for discarded sections. | |
1206 | Need to redesign code below. */ | |
1207 | ||
1208 | /* Get the symbol's entry in the symtab. */ | |
1209 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
1210 | ||
1211 | while (h->root.type == bfd_link_hash_indirect | |
1212 | || h->root.type == bfd_link_hash_warning) | |
1213 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
1214 | ||
1215 | /* If we have encountered a definition for this symbol. */ | |
1216 | if (h->root.type == bfd_link_hash_defined | |
1217 | || h->root.type == bfd_link_hash_defweak) | |
1218 | { | |
1219 | reloc_data.sym_value = h->root.u.def.value; | |
1220 | sec = h->root.u.def.section; | |
1221 | } | |
1222 | } | |
1223 | ||
1224 | /* Clean relocs for symbols in discarded sections. */ | |
1225 | if (sec != NULL && discarded_section (sec)) | |
1226 | { | |
1227 | _bfd_clear_contents (howto, input_bfd, input_section, | |
1228 | contents + rel->r_offset); | |
1229 | rel->r_offset = rel->r_offset; | |
1230 | rel->r_info = 0; | |
1231 | rel->r_addend = 0; | |
1232 | ||
1233 | /* For ld -r, remove relocations in debug sections against | |
1234 | sections defined in discarded sections. Not done for | |
1235 | eh_frame editing code expects to be present. */ | |
1236 | if (bfd_link_relocatable (info) | |
1237 | && (input_section->flags & SEC_DEBUGGING)) | |
1238 | wrel--; | |
1239 | ||
1240 | continue; | |
1241 | } | |
1242 | ||
1243 | if (bfd_link_relocatable (info)) | |
1244 | { | |
1245 | if (wrel != rel) | |
1246 | *wrel = *rel; | |
1247 | continue; | |
1248 | } | |
1249 | ||
1250 | if (r_symndx < symtab_hdr->sh_info) /* A local symbol. */ | |
1251 | { | |
1252 | struct got_entry *entry; | |
1253 | ||
1254 | local_got_ents = arc_get_local_got_ents (output_bfd); | |
1255 | entry = local_got_ents[r_symndx]; | |
886a2506 NC |
1256 | |
1257 | reloc_data.sym_value = sym->st_value; | |
1258 | reloc_data.sym_section = sec; | |
4b0c052e | 1259 | reloc_data.symbol_name = |
3c8adaca CZ |
1260 | bfd_elf_string_from_elf_section (input_bfd, |
1261 | symtab_hdr->sh_link, | |
1262 | sym->st_name); | |
886a2506 | 1263 | |
841fdfcd CZ |
1264 | /* Mergeable section handling. */ |
1265 | if ((sec->flags & SEC_MERGE) | |
1266 | && ELF_ST_TYPE (sym->st_info) == STT_SECTION) | |
1267 | { | |
1268 | asection *msec; | |
1269 | msec = sec; | |
1270 | rel->r_addend = _bfd_elf_rel_local_sym (output_bfd, sym, | |
1271 | &msec, rel->r_addend); | |
1272 | rel->r_addend -= (sec->output_section->vma | |
1273 | + sec->output_offset | |
1274 | + sym->st_value); | |
1275 | rel->r_addend += msec->output_section->vma + msec->output_offset; | |
1276 | ||
1277 | reloc_data.reloc_addend = rel->r_addend; | |
1278 | } | |
1279 | ||
34e967a5 MC |
1280 | if ((is_reloc_for_GOT (howto) |
1281 | || is_reloc_for_TLS (howto)) && entry != NULL) | |
1282 | { | |
1283 | if (is_reloc_for_TLS (howto)) | |
1284 | while (entry->type == GOT_NORMAL && entry->next != NULL) | |
1285 | entry = entry->next; | |
1286 | ||
1287 | if (is_reloc_for_GOT (howto)) | |
1288 | while (entry->type != GOT_NORMAL && entry->next != NULL) | |
1289 | entry = entry->next; | |
1290 | ||
1291 | if (entry->type == GOT_TLS_GD && entry->processed == FALSE) | |
1292 | { | |
1293 | bfd_vma sym_vma = sym->st_value | |
1294 | + sec->output_section->vma | |
1295 | + sec->output_offset; | |
1296 | ||
1297 | /* Create dynamic relocation for local sym. */ | |
1298 | ADD_RELA (output_bfd, got, entry->offset, 0, | |
1299 | R_ARC_TLS_DTPMOD, 0); | |
1300 | ADD_RELA (output_bfd, got, entry->offset+4, 0, | |
1301 | R_ARC_TLS_DTPOFF, 0); | |
1302 | ||
1303 | bfd_vma sec_vma = sec->output_section->vma | |
1304 | + sec->output_offset; | |
1305 | bfd_put_32 (output_bfd, sym_vma - sec_vma, | |
1306 | htab->sgot->contents + entry->offset + 4); | |
1307 | ||
1308 | ARC_DEBUG ("arc_info: FIXED -> GOT_TLS_GD value " | |
1309 | "= 0x%x @ 0x%x, for symbol %s\n", | |
1310 | sym_vma - sec_vma, | |
1311 | htab->sgot->contents + entry->offset + 4, | |
1312 | "(local)"); | |
1313 | ||
1314 | entry->processed = TRUE; | |
1315 | } | |
1316 | if (entry->type == GOT_TLS_IE && entry->processed == FALSE) | |
1317 | { | |
1318 | bfd_vma sym_vma = sym->st_value | |
1319 | + sec->output_section->vma | |
1320 | + sec->output_offset; | |
1321 | bfd_vma sec_vma = htab->tls_sec->output_section->vma; | |
1322 | bfd_put_32 (output_bfd, sym_vma - sec_vma, | |
1323 | htab->sgot->contents + entry->offset); | |
1324 | /* TODO: Check if this type of relocs is the cause | |
1325 | for all the ARC_NONE dynamic relocs. */ | |
1326 | ||
1327 | ARC_DEBUG ("arc_info: FIXED -> GOT_TLS_IE value = " | |
1328 | "0x%x @ 0x%x, for symbol %s\n", | |
1329 | sym_vma - sec_vma, | |
1330 | htab->sgot->contents + entry->offset, | |
1331 | "(local)"); | |
1332 | ||
1333 | entry->processed = TRUE; | |
1334 | } | |
1335 | if (entry->type == GOT_NORMAL && entry->processed == FALSE) | |
1336 | { | |
1337 | bfd_vma sec_vma = reloc_data.sym_section->output_section->vma | |
1338 | + reloc_data.sym_section->output_offset; | |
1339 | ||
1340 | bfd_put_32 (output_bfd, reloc_data.sym_value + sec_vma, | |
1341 | htab->sgot->contents + entry->offset); | |
1342 | ||
1343 | ARC_DEBUG ("arc_info: PATCHED: 0x%08x @ 0x%08x for " | |
1344 | "sym %s in got offset 0x%x\n", | |
1345 | reloc_data.sym_value + sec_vma, | |
1346 | htab->sgot->output_section->vma | |
1347 | + htab->sgot->output_offset + entry->offset, | |
1348 | "(local)", | |
1349 | entry->offset); | |
1350 | entry->processed = TRUE; | |
1351 | } | |
1352 | ||
1353 | reloc_data.got_offset_value = entry->offset; | |
1354 | ARC_DEBUG ("arc_info: GOT_ENTRY = %d, offset = 0x%x, " | |
1355 | "vma = 0x%x for symbol %s\n", | |
1356 | entry->type, entry->offset, | |
1357 | htab->sgot->output_section->vma | |
1358 | + htab->sgot->output_offset + entry->offset, | |
1359 | "(local)"); | |
1360 | } | |
1361 | ||
1362 | BFD_ASSERT (htab->sgot != NULL || !is_reloc_for_GOT (howto)); | |
1363 | if (htab->sgot != NULL) | |
1364 | reloc_data.got_symbol_vma = htab->sgot->output_section->vma | |
1365 | + htab->sgot->output_offset; | |
886a2506 NC |
1366 | |
1367 | reloc_data.should_relocate = TRUE; | |
1368 | } | |
1369 | else /* Global symbol. */ | |
1370 | { | |
1371 | /* Get the symbol's entry in the symtab. */ | |
1372 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
1373 | ||
1374 | while (h->root.type == bfd_link_hash_indirect | |
1375 | || h->root.type == bfd_link_hash_warning) | |
1376 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
1377 | ||
3c8adaca CZ |
1378 | /* TODO: Need to validate what was the intention. */ |
1379 | /* BFD_ASSERT ((h->dynindx == -1) || (h->forced_local != 0)); */ | |
4b0c052e | 1380 | reloc_data.symbol_name = h->root.root.string; |
3c8adaca | 1381 | |
886a2506 NC |
1382 | /* If we have encountered a definition for this symbol. */ |
1383 | if (h->root.type == bfd_link_hash_defined | |
1384 | || h->root.type == bfd_link_hash_defweak) | |
1385 | { | |
1386 | reloc_data.sym_value = h->root.u.def.value; | |
1387 | reloc_data.sym_section = h->root.u.def.section; | |
1388 | ||
1389 | reloc_data.should_relocate = TRUE; | |
1390 | ||
34e967a5 | 1391 | if (is_reloc_for_GOT (howto) && !bfd_link_pic (info)) |
886a2506 | 1392 | { |
34e967a5 MC |
1393 | /* TODO: Change it to use arc_do_relocation with |
1394 | ARC_32 reloc. Try to use ADD_RELA macro. */ | |
886a2506 NC |
1395 | bfd_vma relocation = |
1396 | reloc_data.sym_value + reloc_data.reloc_addend | |
34e967a5 MC |
1397 | + (reloc_data.sym_section->output_section != NULL ? |
1398 | (reloc_data.sym_section->output_offset | |
1399 | + reloc_data.sym_section->output_section->vma) | |
1400 | : 0); | |
1401 | ||
1402 | BFD_ASSERT (h->got.glist); | |
1403 | bfd_vma got_offset = h->got.glist->offset; | |
1404 | bfd_put_32 (output_bfd, relocation, | |
1405 | htab->sgot->contents + got_offset); | |
1406 | } | |
1407 | if (is_reloc_for_PLT (howto) && h->plt.offset != (bfd_vma) -1) | |
1408 | { | |
1409 | /* TODO: This is repeated up here. */ | |
1410 | reloc_data.sym_value = h->plt.offset; | |
1411 | reloc_data.sym_section = htab->splt; | |
886a2506 NC |
1412 | } |
1413 | } | |
1414 | else if (h->root.type == bfd_link_hash_undefweak) | |
1415 | { | |
1416 | /* Is weak symbol and has no definition. */ | |
34e967a5 MC |
1417 | if (is_reloc_for_GOT (howto)) |
1418 | { | |
1419 | reloc_data.sym_value = h->root.u.def.value; | |
1420 | reloc_data.sym_section = htab->sgot; | |
1421 | reloc_data.should_relocate = TRUE; | |
1422 | } | |
1423 | else if (is_reloc_for_PLT (howto) | |
1424 | && h->plt.offset != (bfd_vma) -1) | |
1425 | { | |
1426 | /* TODO: This is repeated up here. */ | |
1427 | reloc_data.sym_value = h->plt.offset; | |
1428 | reloc_data.sym_section = htab->splt; | |
1429 | reloc_data.should_relocate = TRUE; | |
1430 | } | |
1431 | else | |
1432 | continue; | |
886a2506 NC |
1433 | } |
1434 | else | |
1435 | { | |
1436 | if (is_reloc_for_GOT (howto)) | |
1437 | { | |
886a2506 | 1438 | reloc_data.sym_value = h->root.u.def.value; |
34e967a5 | 1439 | reloc_data.sym_section = htab->sgot; |
886a2506 NC |
1440 | |
1441 | reloc_data.should_relocate = TRUE; | |
1442 | } | |
1443 | else if (is_reloc_for_PLT (howto)) | |
1444 | { | |
7e458899 CZ |
1445 | /* Fail if it is linking for PIE and the symbol is |
1446 | undefined. */ | |
1a72702b AM |
1447 | if (bfd_link_executable (info)) |
1448 | (*info->callbacks->undefined_symbol) | |
1449 | (info, h->root.root.string, input_bfd, input_section, | |
1450 | rel->r_offset, TRUE); | |
886a2506 | 1451 | reloc_data.sym_value = h->plt.offset; |
34e967a5 | 1452 | reloc_data.sym_section = htab->splt; |
886a2506 NC |
1453 | |
1454 | reloc_data.should_relocate = TRUE; | |
1455 | } | |
1a72702b AM |
1456 | else if (!bfd_link_pic (info)) |
1457 | (*info->callbacks->undefined_symbol) | |
1458 | (info, h->root.root.string, input_bfd, input_section, | |
1459 | rel->r_offset, TRUE); | |
886a2506 NC |
1460 | } |
1461 | ||
34e967a5 MC |
1462 | if (h->got.glist != NULL) |
1463 | { | |
1464 | struct got_entry *entry = h->got.glist; | |
1465 | ||
1466 | if (is_reloc_for_GOT (howto) || is_reloc_for_TLS (howto)) | |
1467 | { | |
1468 | if (! elf_hash_table (info)->dynamic_sections_created | |
1469 | || (bfd_link_pic (info) | |
1470 | && SYMBOL_REFERENCES_LOCAL (info, h))) | |
1471 | { | |
1472 | reloc_data.sym_value = h->root.u.def.value; | |
1473 | reloc_data.sym_section = h->root.u.def.section; | |
1474 | ||
1475 | if (is_reloc_for_TLS (howto)) | |
1476 | while (entry->type == GOT_NORMAL && entry->next != NULL) | |
1477 | entry = entry->next; | |
1478 | ||
1479 | if (entry->processed == FALSE | |
1480 | && (entry->type == GOT_TLS_GD | |
1481 | || entry->type == GOT_TLS_IE)) | |
1482 | { | |
1483 | bfd_vma sym_value = h->root.u.def.value | |
1484 | + h->root.u.def.section->output_section->vma | |
1485 | + h->root.u.def.section->output_offset; | |
1486 | ||
1487 | bfd_vma sec_vma = | |
1488 | elf_hash_table (info)->tls_sec->output_section->vma; | |
1489 | ||
1490 | bfd_put_32 (output_bfd, | |
1491 | sym_value - sec_vma, | |
1492 | htab->sgot->contents + entry->offset | |
33cbe6c0 | 1493 | + (entry->existing_entries == TLS_GOT_MOD_AND_OFF ? 4 : 0)); |
34e967a5 MC |
1494 | |
1495 | ARC_DEBUG ("arc_info: FIXED -> %s value = 0x%x " | |
1496 | "@ 0x%x, for symbol %s\n", | |
1497 | (entry->type == GOT_TLS_GD ? "GOT_TLS_GD" : | |
1498 | "GOT_TLS_IE"), | |
1499 | sym_value - sec_vma, | |
1500 | htab->sgot->contents + entry->offset | |
33cbe6c0 | 1501 | + (entry->existing_entries == TLS_GOT_MOD_AND_OFF ? 4 : 0), |
34e967a5 MC |
1502 | h->root.root.string); |
1503 | ||
1504 | entry->processed = TRUE; | |
1505 | } | |
1506 | ||
1507 | if (entry->type == GOT_TLS_IE && entry->processed == FALSE) | |
1508 | { | |
1509 | bfd_vma sec_vma = htab->tls_sec->output_section->vma; | |
1510 | bfd_put_32 (output_bfd, | |
1511 | reloc_data.sym_value - sec_vma, | |
1512 | htab->sgot->contents + entry->offset); | |
1513 | } | |
1514 | ||
1515 | if (entry->type == GOT_NORMAL && entry->processed == FALSE) | |
1516 | { | |
1517 | bfd_vma sec_vma = | |
1518 | reloc_data.sym_section->output_section->vma | |
1519 | + reloc_data.sym_section->output_offset; | |
1520 | ||
1521 | if (h->root.type != bfd_link_hash_undefweak) | |
1522 | { | |
1523 | bfd_put_32 (output_bfd, | |
1524 | reloc_data.sym_value + sec_vma, | |
1525 | htab->sgot->contents + entry->offset); | |
1526 | ||
1527 | ARC_DEBUG ("arc_info: PATCHED: 0x%08x " | |
1528 | "@ 0x%08x for sym %s in got offset 0x%x\n", | |
1529 | reloc_data.sym_value + sec_vma, | |
1530 | htab->sgot->output_section->vma | |
1531 | + htab->sgot->output_offset + entry->offset, | |
1532 | h->root.root.string, | |
1533 | entry->offset); | |
1534 | } | |
1535 | else | |
1536 | { | |
1537 | ARC_DEBUG ("arc_info: PATCHED: NOT_PATCHED " | |
1538 | "@ 0x%08x for sym %s in got offset 0x%x " | |
1539 | "(is undefweak)\n", | |
1540 | htab->sgot->output_section->vma | |
1541 | + htab->sgot->output_offset + entry->offset, | |
1542 | h->root.root.string, | |
1543 | entry->offset); | |
1544 | } | |
1545 | ||
1546 | entry->processed = TRUE; | |
1547 | } | |
1548 | } | |
1549 | } | |
1550 | ||
1551 | reloc_data.got_offset_value = entry->offset; | |
1552 | ||
1553 | ARC_DEBUG ("arc_info: GOT_ENTRY = %d, offset = 0x%x, " | |
1554 | "vma = 0x%x for symbol %s\n", | |
1555 | entry->type, entry->offset, | |
1556 | htab->sgot->output_section->vma | |
1557 | + htab->sgot->output_offset + entry->offset, | |
1558 | h->root.root.string); | |
1559 | } | |
1560 | ||
1561 | BFD_ASSERT (htab->sgot != NULL || !is_reloc_for_GOT (howto)); | |
1562 | if (htab->sgot != NULL) | |
1563 | reloc_data.got_symbol_vma = htab->sgot->output_section->vma | |
1564 | + htab->sgot->output_offset; | |
886a2506 NC |
1565 | } |
1566 | ||
34e967a5 MC |
1567 | switch (r_type) |
1568 | { | |
1569 | case R_ARC_32: | |
1570 | case R_ARC_32_ME: | |
1571 | case R_ARC_PC32: | |
1572 | case R_ARC_32_PCREL: | |
2ab2f40d | 1573 | if ((bfd_link_pic (info) || bfd_link_pie (info)) |
34e967a5 MC |
1574 | && ((r_type != R_ARC_PC32 && r_type != R_ARC_32_PCREL) |
1575 | || (h != NULL | |
1576 | && h->dynindx != -1 | |
1577 | && (!info->symbolic || !h->def_regular)))) | |
1578 | { | |
1579 | Elf_Internal_Rela outrel; | |
1580 | bfd_byte *loc; | |
1581 | bfd_boolean skip = FALSE; | |
1582 | bfd_boolean relocate = FALSE; | |
1583 | asection *sreloc = _bfd_elf_get_dynamic_reloc_section | |
1584 | (input_bfd, input_section, | |
1585 | /*RELA*/ TRUE); | |
1586 | ||
1587 | BFD_ASSERT (sreloc != NULL); | |
1588 | ||
1589 | outrel.r_offset = _bfd_elf_section_offset (output_bfd, | |
1590 | info, | |
1591 | input_section, | |
1592 | rel->r_offset); | |
1593 | if (outrel.r_offset == (bfd_vma) -1) | |
1594 | skip = TRUE; | |
1595 | ||
1596 | outrel.r_addend = rel->r_addend; | |
1597 | outrel.r_offset += (input_section->output_section->vma | |
1598 | + input_section->output_offset); | |
1599 | ||
3c8adaca CZ |
1600 | #define IS_ARC_PCREL_TYPE(TYPE) \ |
1601 | ( (TYPE == R_ARC_PC32) \ | |
1602 | || (TYPE == R_ARC_32_PCREL)) | |
34e967a5 MC |
1603 | if (skip) |
1604 | { | |
1605 | memset (&outrel, 0, sizeof outrel); | |
1606 | relocate = FALSE; | |
1607 | } | |
3c8adaca CZ |
1608 | else if (h != NULL |
1609 | && h->dynindx != -1 | |
1610 | && ((IS_ARC_PCREL_TYPE (r_type)) | |
1611 | || !(bfd_link_executable (info) | |
1612 | || SYMBOLIC_BIND (info, h)) | |
1613 | || ! h->def_regular)) | |
34e967a5 | 1614 | { |
94e5c971 | 1615 | BFD_ASSERT (h != NULL); |
34e967a5 MC |
1616 | if ((input_section->flags & SEC_ALLOC) != 0) |
1617 | relocate = FALSE; | |
1618 | else | |
1619 | relocate = TRUE; | |
94e5c971 CZ |
1620 | |
1621 | BFD_ASSERT (h->dynindx != -1); | |
34e967a5 MC |
1622 | outrel.r_info = ELF32_R_INFO (h->dynindx, r_type); |
1623 | } | |
1624 | else | |
1625 | { | |
1626 | /* Handle local symbols, they either do not have a | |
1627 | global hash table entry (h == NULL), or are | |
1628 | forced local due to a version script | |
1629 | (h->forced_local), or the third condition is | |
1630 | legacy, it appears to say something like, for | |
1631 | links where we are pre-binding the symbols, or | |
1632 | there's not an entry for this symbol in the | |
1633 | dynamic symbol table, and it's a regular symbol | |
1634 | not defined in a shared object, then treat the | |
1635 | symbol as local, resolve it now. */ | |
3c8adaca CZ |
1636 | relocate = TRUE; |
1637 | /* outrel.r_addend = 0; */ | |
1638 | outrel.r_info = ELF32_R_INFO (0, R_ARC_RELATIVE); | |
34e967a5 MC |
1639 | } |
1640 | ||
1641 | BFD_ASSERT (sreloc->contents != 0); | |
1642 | ||
1643 | loc = sreloc->contents; | |
1644 | loc += sreloc->reloc_count * sizeof (Elf32_External_Rela); | |
1645 | sreloc->reloc_count += 1; | |
1646 | ||
1647 | bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc); | |
1648 | ||
1649 | if (relocate == FALSE) | |
1650 | continue; | |
1651 | } | |
1652 | break; | |
1653 | default: | |
1654 | break; | |
1655 | } | |
1656 | ||
1657 | if (is_reloc_SDA_relative (howto) | |
1658 | && (reloc_data.sdata_begin_symbol_vma_set == FALSE)) | |
886a2506 NC |
1659 | { |
1660 | (*_bfd_error_handler) | |
1661 | ("Error: Linker symbol __SDATA_BEGIN__ not found"); | |
1662 | bfd_set_error (bfd_error_bad_value); | |
1663 | return FALSE; | |
1664 | } | |
1665 | ||
1666 | DEBUG_ARC_RELOC (reloc_data); | |
34e967a5 | 1667 | |
2ab2f40d CM |
1668 | /* Make sure we have with a dynamic linker. In case of GOT and PLT |
1669 | the sym_section should point to .got or .plt respectively. */ | |
815dc1bc CZ |
1670 | if ((is_reloc_for_GOT (howto) || is_reloc_for_PLT (howto)) |
1671 | && reloc_data.sym_section == NULL) | |
2ab2f40d CM |
1672 | { |
1673 | (*_bfd_error_handler) | |
1674 | (_("GOT and PLT relocations cannot be fixed with a non dynamic linker.")); | |
1675 | bfd_set_error (bfd_error_bad_value); | |
1676 | return FALSE; | |
1677 | } | |
1678 | ||
34e967a5 | 1679 | if (arc_do_relocation (contents, reloc_data, info) != bfd_reloc_ok) |
886a2506 NC |
1680 | return FALSE; |
1681 | } | |
1682 | ||
1683 | return TRUE; | |
1684 | } | |
1685 | ||
1686 | static struct dynamic_sections | |
1687 | arc_create_dynamic_sections (bfd * abfd, struct bfd_link_info *info) | |
1688 | { | |
34e967a5 MC |
1689 | struct elf_link_hash_table *htab; |
1690 | bfd *dynobj; | |
886a2506 | 1691 | struct dynamic_sections ds = |
886a2506 | 1692 | { |
34e967a5 MC |
1693 | .initialized = FALSE, |
1694 | .sgot = NULL, | |
1695 | .srelgot = NULL, | |
1696 | .sgotplt = NULL, | |
1697 | .srelgotplt = NULL, | |
1698 | .sdyn = NULL, | |
1699 | .splt = NULL, | |
1700 | .srelplt = NULL | |
1701 | }; | |
1702 | ||
1703 | htab = elf_hash_table (info); | |
1704 | BFD_ASSERT (htab); | |
1705 | ||
1706 | /* Create dynamic sections for relocatable executables so that we | |
1707 | can copy relocations. */ | |
1708 | if (! htab->dynamic_sections_created && bfd_link_pic (info)) | |
1709 | { | |
1710 | if (! _bfd_elf_link_create_dynamic_sections (abfd, info)) | |
1711 | BFD_ASSERT (0); | |
886a2506 | 1712 | } |
886a2506 | 1713 | |
34e967a5 | 1714 | dynobj = (elf_hash_table (info))->dynobj; |
886a2506 | 1715 | |
34e967a5 | 1716 | if (dynobj) |
886a2506 | 1717 | { |
34e967a5 MC |
1718 | ds.sgot = htab->sgot; |
1719 | ds.srelgot = htab->srelgot; | |
886a2506 | 1720 | |
34e967a5 MC |
1721 | ds.sgotplt = bfd_get_section_by_name (dynobj, ".got.plt"); |
1722 | ds.srelgotplt = ds.srelplt; | |
886a2506 | 1723 | |
34e967a5 MC |
1724 | ds.splt = bfd_get_section_by_name (dynobj, ".plt"); |
1725 | ds.srelplt = bfd_get_section_by_name (dynobj, ".rela.plt"); | |
1726 | } | |
1727 | ||
1728 | if (htab->dynamic_sections_created) | |
1729 | { | |
1730 | ds.sdyn = bfd_get_section_by_name (dynobj, ".dynamic"); | |
1731 | } | |
886a2506 NC |
1732 | |
1733 | ds.initialized = TRUE; | |
1734 | ||
1735 | return ds; | |
1736 | } | |
1737 | ||
34e967a5 MC |
1738 | #define ADD_SYMBOL_REF_SEC_AND_RELOC(SECNAME, COND_FOR_RELOC, H) \ |
1739 | htab->s##SECNAME->size; \ | |
1740 | { \ | |
1741 | if (COND_FOR_RELOC) \ | |
1742 | { \ | |
1743 | htab->srel##SECNAME->size += sizeof (Elf32_External_Rela); \ | |
1744 | ARC_DEBUG ("arc_info: Added reloc space in " \ | |
1745 | #SECNAME " section at " __FILE__ \ | |
1746 | ":%d for symbol\n", \ | |
1747 | __LINE__, name_for_global_symbol (H)); \ | |
1748 | } \ | |
1749 | if (H) \ | |
1750 | if (h->dynindx == -1 && !h->forced_local) \ | |
1751 | if (! bfd_elf_link_record_dynamic_symbol (info, H)) \ | |
1752 | return FALSE; \ | |
1753 | htab->s##SECNAME->size += 4; \ | |
1754 | } | |
886a2506 NC |
1755 | |
1756 | static bfd_boolean | |
34e967a5 | 1757 | elf_arc_check_relocs (bfd * abfd, |
886a2506 | 1758 | struct bfd_link_info * info, |
34e967a5 | 1759 | asection * sec, |
886a2506 NC |
1760 | const Elf_Internal_Rela * relocs) |
1761 | { | |
34e967a5 MC |
1762 | Elf_Internal_Shdr * symtab_hdr; |
1763 | struct elf_link_hash_entry ** sym_hashes; | |
1764 | struct got_entry ** local_got_ents; | |
1765 | const Elf_Internal_Rela * rel; | |
1766 | const Elf_Internal_Rela * rel_end; | |
1767 | bfd * dynobj; | |
1768 | asection * sreloc = NULL; | |
1769 | struct elf_link_hash_table * htab = elf_hash_table (info); | |
1770 | ||
1771 | if (bfd_link_relocatable (info)) | |
1772 | return TRUE; | |
886a2506 NC |
1773 | |
1774 | dynobj = (elf_hash_table (info))->dynobj; | |
1775 | symtab_hdr = &((elf_tdata (abfd))->symtab_hdr); | |
1776 | sym_hashes = elf_sym_hashes (abfd); | |
34e967a5 | 1777 | local_got_ents = arc_get_local_got_ents (abfd); |
886a2506 NC |
1778 | |
1779 | rel_end = relocs + sec->reloc_count; | |
1780 | for (rel = relocs; rel < rel_end; rel++) | |
1781 | { | |
1782 | enum elf_arc_reloc_type r_type; | |
1783 | reloc_howto_type *howto; | |
1784 | unsigned long r_symndx; | |
1785 | struct elf_link_hash_entry *h; | |
1786 | ||
1787 | r_type = ELF32_R_TYPE (rel->r_info); | |
1788 | ||
1789 | if (r_type >= (int) R_ARC_max) | |
1790 | { | |
1791 | bfd_set_error (bfd_error_bad_value); | |
1792 | return FALSE; | |
1793 | } | |
3c8adaca | 1794 | howto = arc_elf_howto (r_type); |
34e967a5 MC |
1795 | |
1796 | if (dynobj == NULL | |
1797 | && (is_reloc_for_GOT (howto) == TRUE | |
1798 | || is_reloc_for_TLS (howto) == TRUE)) | |
1799 | { | |
1800 | dynobj = elf_hash_table (info)->dynobj = abfd; | |
1801 | if (! _bfd_elf_create_got_section (abfd, info)) | |
1802 | return FALSE; | |
1803 | } | |
886a2506 NC |
1804 | |
1805 | /* Load symbol information. */ | |
1806 | r_symndx = ELF32_R_SYM (rel->r_info); | |
1807 | if (r_symndx < symtab_hdr->sh_info) /* Is a local symbol. */ | |
1808 | h = NULL; | |
1809 | else /* Global one. */ | |
1810 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
1811 | ||
34e967a5 MC |
1812 | switch (r_type) |
1813 | { | |
1814 | case R_ARC_32: | |
1815 | case R_ARC_32_ME: | |
1816 | /* During shared library creation, these relocs should not | |
1817 | appear in a shared library (as memory will be read only | |
1818 | and the dynamic linker can not resolve these. However | |
1819 | the error should not occur for e.g. debugging or | |
1820 | non-readonly sections. */ | |
2ab2f40d | 1821 | if ((bfd_link_dll (info) && !bfd_link_pie (info)) |
34e967a5 | 1822 | && (sec->flags & SEC_ALLOC) != 0 |
3c8adaca CZ |
1823 | && (sec->flags & SEC_READONLY) != 0 |
1824 | && ((sec->flags & SEC_CODE) != 0 | |
1825 | || (sec->flags & SEC_DEBUGGING) != 0)) | |
34e967a5 MC |
1826 | { |
1827 | const char *name; | |
1828 | if (h) | |
1829 | name = h->root.root.string; | |
1830 | else | |
1831 | /* bfd_elf_sym_name (abfd, symtab_hdr, isym, NULL); */ | |
1832 | name = "UNKNOWN"; | |
1833 | (*_bfd_error_handler) | |
1834 | (_("\ | |
1835 | %B: relocation %s against `%s' can not be used when making a shared object; recompile with -fPIC"), | |
1836 | abfd, | |
1837 | arc_elf_howto (r_type)->name, | |
1838 | name); | |
1839 | bfd_set_error (bfd_error_bad_value); | |
1840 | return FALSE; | |
1841 | } | |
1842 | ||
1843 | /* In some cases we are not setting the 'non_got_ref' | |
1844 | flag, even though the relocations don't require a GOT | |
1845 | access. We should extend the testing in this area to | |
1846 | ensure that no significant cases are being missed. */ | |
1847 | if (h) | |
1848 | h->non_got_ref = 1; | |
1849 | /* FALLTHROUGH */ | |
1850 | case R_ARC_PC32: | |
1851 | case R_ARC_32_PCREL: | |
2ab2f40d | 1852 | if ((bfd_link_pic (info) || bfd_link_pie (info)) |
34e967a5 MC |
1853 | && ((r_type != R_ARC_PC32 && r_type != R_ARC_32_PCREL) |
1854 | || (h != NULL | |
1855 | && h->dynindx != -1 | |
1856 | && (!info->symbolic || !h->def_regular)))) | |
1857 | { | |
1858 | if (sreloc == NULL) | |
1859 | { | |
1860 | sreloc = _bfd_elf_make_dynamic_reloc_section (sec, dynobj, | |
1861 | 2, abfd, | |
1862 | /*rela*/ | |
1863 | TRUE); | |
1864 | ||
1865 | if (sreloc == NULL) | |
1866 | return FALSE; | |
1867 | } | |
1868 | sreloc->size += sizeof (Elf32_External_Rela); | |
1869 | ||
1870 | } | |
1871 | default: | |
1872 | break; | |
1873 | } | |
1874 | ||
886a2506 NC |
1875 | if (is_reloc_for_PLT (howto) == TRUE) |
1876 | { | |
1877 | if (h == NULL) | |
1878 | continue; | |
1879 | else | |
1880 | h->needs_plt = 1; | |
1881 | } | |
1882 | ||
1883 | if (is_reloc_for_GOT (howto) == TRUE) | |
1884 | { | |
1885 | if (h == NULL) | |
1886 | { | |
1887 | /* Local symbol. */ | |
34e967a5 MC |
1888 | if (local_got_ents[r_symndx] == NULL) |
1889 | { | |
1890 | bfd_vma offset = | |
1891 | ADD_SYMBOL_REF_SEC_AND_RELOC (got, | |
1892 | bfd_link_pic (info), | |
1893 | NULL); | |
1894 | new_got_entry_to_list (&(local_got_ents[r_symndx]), | |
33cbe6c0 | 1895 | GOT_NORMAL, offset, TLS_GOT_NONE); |
34e967a5 | 1896 | } |
886a2506 NC |
1897 | } |
1898 | else | |
1899 | { | |
1900 | /* Global symbol. */ | |
1901 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
34e967a5 MC |
1902 | if (h->got.glist == NULL) |
1903 | { | |
1904 | bfd_vma offset = | |
1905 | ADD_SYMBOL_REF_SEC_AND_RELOC (got, TRUE, h); | |
1906 | new_got_entry_to_list (&h->got.glist, | |
33cbe6c0 | 1907 | GOT_NORMAL, offset, TLS_GOT_NONE); |
34e967a5 | 1908 | } |
886a2506 NC |
1909 | } |
1910 | } | |
886a2506 | 1911 | |
34e967a5 MC |
1912 | if (is_reloc_for_TLS (howto) == TRUE) |
1913 | { | |
1914 | enum tls_type_e type = GOT_UNKNOWN; | |
886a2506 | 1915 | |
34e967a5 MC |
1916 | switch (r_type) |
1917 | { | |
1918 | case R_ARC_TLS_GD_GOT: | |
1919 | type = GOT_TLS_GD; | |
1920 | break; | |
1921 | case R_ARC_TLS_IE_GOT: | |
1922 | type = GOT_TLS_IE; | |
1923 | break; | |
1924 | default: | |
1925 | break; | |
1926 | } | |
886a2506 | 1927 | |
34e967a5 MC |
1928 | struct got_entry **list = NULL; |
1929 | if (h != NULL) | |
1930 | list = &(h->got.glist); | |
1931 | else | |
1932 | list = &(local_got_ents[r_symndx]); | |
886a2506 | 1933 | |
34e967a5 MC |
1934 | if (type != GOT_UNKNOWN && !symbol_has_entry_of_type (*list, type)) |
1935 | { | |
33cbe6c0 | 1936 | enum tls_got_entries entries = TLS_GOT_NONE; |
34e967a5 MC |
1937 | bfd_vma offset = |
1938 | ADD_SYMBOL_REF_SEC_AND_RELOC (got, TRUE, h); | |
886a2506 | 1939 | |
34e967a5 MC |
1940 | if (type == GOT_TLS_GD) |
1941 | { | |
1942 | bfd_vma ATTRIBUTE_UNUSED notneeded = | |
1943 | ADD_SYMBOL_REF_SEC_AND_RELOC (got, TRUE, h); | |
33cbe6c0 | 1944 | entries = TLS_GOT_MOD_AND_OFF; |
34e967a5 | 1945 | } |
886a2506 | 1946 | |
33cbe6c0 AB |
1947 | if (entries == TLS_GOT_NONE) |
1948 | entries = TLS_GOT_OFF; | |
886a2506 | 1949 | |
34e967a5 MC |
1950 | new_got_entry_to_list (list, type, offset, entries); |
1951 | } | |
1952 | } | |
1953 | } | |
886a2506 | 1954 | |
34e967a5 MC |
1955 | return TRUE; |
1956 | } | |
886a2506 | 1957 | |
34e967a5 | 1958 | #define ELF_DYNAMIC_INTERPRETER "/sbin/ld-uClibc.so" |
886a2506 | 1959 | |
34e967a5 MC |
1960 | static struct plt_version_t * |
1961 | arc_get_plt_version (struct bfd_link_info *info) | |
886a2506 | 1962 | { |
34e967a5 | 1963 | int i; |
886a2506 | 1964 | |
34e967a5 MC |
1965 | for (i = 0; i < 1; i++) |
1966 | { | |
1967 | ARC_DEBUG ("%d: size1 = %d, size2 = %d\n", i, | |
1968 | plt_versions[i].entry_size, | |
1969 | plt_versions[i].elem_size); | |
1970 | } | |
886a2506 | 1971 | |
34e967a5 | 1972 | if (bfd_get_mach (info->output_bfd) == bfd_mach_arc_arcv2) |
886a2506 | 1973 | { |
34e967a5 MC |
1974 | if (bfd_link_pic (info)) |
1975 | return &(plt_versions[ELF_ARCV2_PIC]); | |
1976 | else | |
1977 | return &(plt_versions[ELF_ARCV2_ABS]); | |
1978 | } | |
1979 | else | |
886a2506 | 1980 | { |
34e967a5 MC |
1981 | if (bfd_link_pic (info)) |
1982 | return &(plt_versions[ELF_ARC_PIC]); | |
1983 | else | |
1984 | return &(plt_versions[ELF_ARC_ABS]); | |
886a2506 | 1985 | } |
886a2506 NC |
1986 | } |
1987 | ||
1988 | static bfd_vma | |
1989 | add_symbol_to_plt (struct bfd_link_info *info) | |
1990 | { | |
34e967a5 | 1991 | struct elf_link_hash_table *htab = elf_hash_table (info); |
886a2506 NC |
1992 | bfd_vma ret; |
1993 | ||
34e967a5 | 1994 | struct plt_version_t *plt_data = arc_get_plt_version (info); |
886a2506 | 1995 | |
34e967a5 MC |
1996 | /* If this is the first .plt entry, make room for the special first |
1997 | entry. */ | |
1998 | if (htab->splt->size == 0) | |
1999 | htab->splt->size += plt_data->entry_size; | |
886a2506 | 2000 | |
34e967a5 MC |
2001 | ret = htab->splt->size; |
2002 | ||
2003 | htab->splt->size += plt_data->elem_size; | |
2004 | ARC_DEBUG ("PLT_SIZE = %d\n", htab->splt->size); | |
2005 | ||
2006 | htab->sgotplt->size += 4; | |
2007 | htab->srelplt->size += sizeof (Elf32_External_Rela); | |
886a2506 NC |
2008 | |
2009 | return ret; | |
2010 | } | |
2011 | ||
34e967a5 MC |
2012 | #define PLT_DO_RELOCS_FOR_ENTRY(ABFD, DS, RELOCS) \ |
2013 | plt_do_relocs_for_symbol (ABFD, DS, RELOCS, 0, 0) | |
886a2506 NC |
2014 | |
2015 | static void | |
34e967a5 MC |
2016 | plt_do_relocs_for_symbol (bfd *abfd, |
2017 | struct elf_link_hash_table *htab, | |
2018 | const struct plt_reloc *reloc, | |
886a2506 NC |
2019 | bfd_vma plt_offset, |
2020 | bfd_vma symbol_got_offset) | |
2021 | { | |
2022 | while (SYM_ONLY (reloc->symbol) != LAST_RELOC) | |
2023 | { | |
2024 | bfd_vma relocation = 0; | |
2025 | ||
2026 | switch (SYM_ONLY (reloc->symbol)) | |
2027 | { | |
2028 | case SGOT: | |
2029 | relocation = | |
34e967a5 MC |
2030 | htab->sgotplt->output_section->vma + |
2031 | htab->sgotplt->output_offset + symbol_got_offset; | |
886a2506 NC |
2032 | break; |
2033 | } | |
2034 | relocation += reloc->addend; | |
2035 | ||
34e967a5 MC |
2036 | if (IS_RELATIVE (reloc->symbol)) |
2037 | { | |
2038 | bfd_vma reloc_offset = reloc->offset; | |
2039 | reloc_offset -= (IS_INSN_32 (reloc->symbol)) ? 4 : 0; | |
2040 | reloc_offset -= (IS_INSN_24 (reloc->symbol)) ? 2 : 0; | |
886a2506 | 2041 | |
34e967a5 MC |
2042 | relocation -= htab->splt->output_section->vma |
2043 | + htab->splt->output_offset | |
2044 | + plt_offset + reloc_offset; | |
2045 | } | |
2046 | ||
2047 | /* TODO: being ME is not a property of the relocation but of the | |
2048 | section of which is applying the relocation. */ | |
1e5885b7 | 2049 | if (IS_MIDDLE_ENDIAN (reloc->symbol) && !bfd_big_endian (abfd)) |
886a2506 NC |
2050 | { |
2051 | relocation = | |
2052 | ((relocation & 0xffff0000) >> 16) | | |
2053 | ((relocation & 0xffff) << 16); | |
2054 | } | |
2055 | ||
2056 | switch (reloc->size) | |
2057 | { | |
2058 | case 32: | |
34e967a5 | 2059 | bfd_put_32 (htab->splt->output_section->owner, |
886a2506 | 2060 | relocation, |
34e967a5 | 2061 | htab->splt->contents + plt_offset + reloc->offset); |
886a2506 NC |
2062 | break; |
2063 | } | |
2064 | ||
34e967a5 | 2065 | reloc = &(reloc[1]); /* Jump to next relocation. */ |
886a2506 NC |
2066 | } |
2067 | } | |
2068 | ||
2069 | static void | |
34e967a5 MC |
2070 | relocate_plt_for_symbol (bfd *output_bfd, |
2071 | struct bfd_link_info *info, | |
886a2506 NC |
2072 | struct elf_link_hash_entry *h) |
2073 | { | |
34e967a5 MC |
2074 | struct plt_version_t *plt_data = arc_get_plt_version (info); |
2075 | struct elf_link_hash_table *htab = elf_hash_table (info); | |
886a2506 | 2076 | |
34e967a5 MC |
2077 | bfd_vma plt_index = (h->plt.offset - plt_data->entry_size) |
2078 | / plt_data->elem_size; | |
886a2506 NC |
2079 | bfd_vma got_offset = (plt_index + 3) * 4; |
2080 | ||
34e967a5 MC |
2081 | ARC_DEBUG ("arc_info: PLT_OFFSET = 0x%x, PLT_ENTRY_VMA = 0x%x, \ |
2082 | GOT_ENTRY_OFFSET = 0x%x, GOT_ENTRY_VMA = 0x%x, for symbol %s\n", | |
2083 | h->plt.offset, | |
2084 | htab->splt->output_section->vma | |
2085 | + htab->splt->output_offset | |
2086 | + h->plt.offset, | |
2087 | got_offset, | |
2088 | htab->sgotplt->output_section->vma | |
2089 | + htab->sgotplt->output_offset | |
2090 | + got_offset, | |
2091 | h->root.root.string); | |
2092 | ||
1e5885b7 CZ |
2093 | |
2094 | { | |
2095 | bfd_vma i = 0; | |
2096 | uint16_t *ptr = (uint16_t *) plt_data->elem; | |
2097 | for (i = 0; i < plt_data->elem_size/2; i++) | |
2098 | { | |
2099 | uint16_t data = ptr[i]; | |
2100 | bfd_put_16 (output_bfd, | |
2101 | (bfd_vma) data, | |
2102 | htab->splt->contents + h->plt.offset + (i*2)); | |
2103 | } | |
2104 | } | |
2105 | ||
34e967a5 MC |
2106 | plt_do_relocs_for_symbol (output_bfd, htab, |
2107 | plt_data->elem_relocs, | |
2108 | h->plt.offset, | |
886a2506 | 2109 | got_offset); |
34e967a5 MC |
2110 | |
2111 | /* Fill in the entry in the global offset table. */ | |
2112 | bfd_put_32 (output_bfd, | |
2113 | (bfd_vma) (htab->splt->output_section->vma | |
2114 | + htab->splt->output_offset), | |
2115 | htab->sgotplt->contents + got_offset); | |
2116 | ||
2117 | /* TODO: Fill in the entry in the .rela.plt section. */ | |
2118 | { | |
2119 | Elf_Internal_Rela rel; | |
2120 | bfd_byte *loc; | |
2121 | ||
2122 | rel.r_offset = (htab->sgotplt->output_section->vma | |
2123 | + htab->sgotplt->output_offset | |
2124 | + got_offset); | |
2125 | rel.r_addend = 0; | |
94e5c971 CZ |
2126 | |
2127 | BFD_ASSERT (h->dynindx != -1); | |
34e967a5 MC |
2128 | rel.r_info = ELF32_R_INFO (h->dynindx, R_ARC_JMP_SLOT); |
2129 | ||
2130 | loc = htab->srelplt->contents; | |
2131 | loc += plt_index * sizeof (Elf32_External_Rela); /* relA */ | |
2132 | bfd_elf32_swap_reloca_out (output_bfd, &rel, loc); | |
2133 | } | |
886a2506 NC |
2134 | } |
2135 | ||
2136 | static void | |
34e967a5 MC |
2137 | relocate_plt_for_entry (bfd *abfd, |
2138 | struct bfd_link_info *info) | |
886a2506 | 2139 | { |
34e967a5 MC |
2140 | struct plt_version_t *plt_data = arc_get_plt_version (info); |
2141 | struct elf_link_hash_table *htab = elf_hash_table (info); | |
886a2506 | 2142 | |
1e5885b7 CZ |
2143 | { |
2144 | bfd_vma i = 0; | |
2145 | uint16_t *ptr = (uint16_t *) plt_data->entry; | |
2146 | for (i = 0; i < plt_data->entry_size/2; i++) | |
2147 | { | |
2148 | uint16_t data = ptr[i]; | |
2149 | bfd_put_16 (abfd, | |
2150 | (bfd_vma) data, | |
2151 | htab->splt->contents + (i*2)); | |
2152 | } | |
2153 | } | |
34e967a5 | 2154 | PLT_DO_RELOCS_FOR_ENTRY (abfd, htab, plt_data->entry_relocs); |
886a2506 NC |
2155 | } |
2156 | ||
34e967a5 MC |
2157 | /* Desc : Adjust a symbol defined by a dynamic object and referenced |
2158 | by a regular object. The current definition is in some section of | |
2159 | the dynamic object, but we're not including those sections. We | |
2160 | have to change the definition to something the rest of the link can | |
886a2506 NC |
2161 | understand. */ |
2162 | ||
2163 | static bfd_boolean | |
2164 | elf_arc_adjust_dynamic_symbol (struct bfd_link_info *info, | |
2165 | struct elf_link_hash_entry *h) | |
2166 | { | |
34e967a5 | 2167 | asection *s; |
886a2506 | 2168 | bfd *dynobj = (elf_hash_table (info))->dynobj; |
34e967a5 | 2169 | struct elf_link_hash_table *htab = elf_hash_table (info); |
886a2506 | 2170 | |
34e967a5 MC |
2171 | if (h->type == STT_FUNC |
2172 | || h->type == STT_GNU_IFUNC | |
2173 | || h->needs_plt == 1) | |
886a2506 NC |
2174 | { |
2175 | if (!bfd_link_pic (info) && !h->def_dynamic && !h->ref_dynamic) | |
2176 | { | |
2177 | /* This case can occur if we saw a PLT32 reloc in an input | |
2178 | file, but the symbol was never referred to by a dynamic | |
2179 | object. In such a case, we don't actually need to build | |
2180 | a procedure linkage table, and we can just do a PC32 | |
2181 | reloc instead. */ | |
2182 | BFD_ASSERT (h->needs_plt); | |
2183 | return TRUE; | |
2184 | } | |
2185 | ||
2186 | /* Make sure this symbol is output as a dynamic symbol. */ | |
2187 | if (h->dynindx == -1 && !h->forced_local | |
2188 | && !bfd_elf_link_record_dynamic_symbol (info, h)) | |
2189 | return FALSE; | |
2190 | ||
34e967a5 MC |
2191 | if (bfd_link_pic (info) |
2192 | || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h)) | |
886a2506 NC |
2193 | { |
2194 | bfd_vma loc = add_symbol_to_plt (info); | |
2195 | ||
2196 | if (!bfd_link_pic (info) && !h->def_regular) | |
2197 | { | |
34e967a5 | 2198 | h->root.u.def.section = htab->splt; |
886a2506 NC |
2199 | h->root.u.def.value = loc; |
2200 | } | |
2201 | h->plt.offset = loc; | |
2202 | } | |
34e967a5 MC |
2203 | else |
2204 | { | |
2205 | h->plt.offset = (bfd_vma) -1; | |
2206 | h->needs_plt = 0; | |
2207 | } | |
2208 | return TRUE; | |
886a2506 | 2209 | } |
34e967a5 MC |
2210 | |
2211 | /* If this is a weak symbol, and there is a real definition, the | |
2212 | processor independent code will have arranged for us to see the | |
2213 | real definition first, and we can just use the same value. */ | |
2214 | if (h->u.weakdef != NULL) | |
886a2506 | 2215 | { |
34e967a5 MC |
2216 | BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined |
2217 | || h->u.weakdef->root.type == bfd_link_hash_defweak); | |
2218 | h->root.u.def.section = h->u.weakdef->root.u.def.section; | |
2219 | h->root.u.def.value = h->u.weakdef->root.u.def.value; | |
2220 | return TRUE; | |
886a2506 NC |
2221 | } |
2222 | ||
34e967a5 MC |
2223 | /* This is a reference to a symbol defined by a dynamic object which |
2224 | is not a function. */ | |
2225 | ||
2226 | /* If we are creating a shared library, we must presume that the | |
2227 | only references to the symbol are via the global offset table. | |
2228 | For such cases we need not do anything here; the relocations will | |
2229 | be handled correctly by relocate_section. */ | |
3c8adaca CZ |
2230 | if (!bfd_link_executable (info)) |
2231 | return TRUE; | |
2232 | ||
2233 | /* If there are no non-GOT references, we do not need a copy | |
2234 | relocation. */ | |
2235 | if (!h->non_got_ref) | |
34e967a5 MC |
2236 | return TRUE; |
2237 | ||
3c8adaca CZ |
2238 | /* If -z nocopyreloc was given, we won't generate them either. */ |
2239 | if (info->nocopyreloc) | |
2240 | { | |
2241 | h->non_got_ref = 0; | |
2242 | return TRUE; | |
2243 | } | |
2244 | ||
34e967a5 MC |
2245 | /* We must allocate the symbol in our .dynbss section, which will |
2246 | become part of the .bss section of the executable. There will be | |
2247 | an entry for this symbol in the .dynsym section. The dynamic | |
2248 | object will contain position independent code, so all references | |
2249 | from the dynamic object to this symbol will go through the global | |
2250 | offset table. The dynamic linker will use the .dynsym entry to | |
2251 | determine the address it must put in the global offset table, so | |
2252 | both the dynamic object and the regular object will refer to the | |
2253 | same memory location for the variable. */ | |
2254 | ||
3c8adaca CZ |
2255 | if (htab == NULL) |
2256 | return FALSE; | |
34e967a5 MC |
2257 | |
2258 | /* We must generate a R_ARC_COPY reloc to tell the dynamic linker to | |
2259 | copy the initial value out of the dynamic object and into the | |
2260 | runtime process image. We need to remember the offset into the | |
2261 | .rela.bss section we are going to use. */ | |
2262 | if ((h->root.u.def.section->flags & SEC_ALLOC) != 0) | |
2263 | { | |
2264 | asection *srel; | |
2265 | ||
2266 | srel = bfd_get_section_by_name (dynobj, ".rela.bss"); | |
2267 | BFD_ASSERT (srel != NULL); | |
2268 | srel->size += sizeof (Elf32_External_Rela); | |
2269 | h->needs_copy = 1; | |
2270 | } | |
2271 | ||
3c8adaca CZ |
2272 | s = bfd_get_section_by_name (dynobj, ".dynbss"); |
2273 | BFD_ASSERT (s != NULL); | |
34e967a5 | 2274 | |
3c8adaca | 2275 | return _bfd_elf_adjust_dynamic_copy (info, h, s); |
886a2506 NC |
2276 | } |
2277 | ||
2278 | /* Function : elf_arc_finish_dynamic_symbol | |
2279 | Brief : Finish up dynamic symbol handling. We set the | |
34e967a5 | 2280 | contents of various dynamic sections here. |
886a2506 | 2281 | Args : output_bfd : |
34e967a5 MC |
2282 | info : |
2283 | h : | |
2284 | sym : | |
886a2506 | 2285 | Returns : True/False as the return status. */ |
34e967a5 | 2286 | |
886a2506 NC |
2287 | static bfd_boolean |
2288 | elf_arc_finish_dynamic_symbol (bfd * output_bfd, | |
2289 | struct bfd_link_info *info, | |
2290 | struct elf_link_hash_entry *h, | |
2291 | Elf_Internal_Sym * sym) | |
2292 | { | |
34e967a5 | 2293 | if (h->plt.offset != (bfd_vma) -1) |
886a2506 | 2294 | { |
34e967a5 MC |
2295 | relocate_plt_for_symbol (output_bfd, info, h); |
2296 | ||
2297 | if (!h->def_regular) | |
886a2506 | 2298 | { |
34e967a5 MC |
2299 | /* Mark the symbol as undefined, rather than as defined in |
2300 | the .plt section. Leave the value alone. */ | |
2301 | sym->st_shndx = SHN_UNDEF; | |
886a2506 | 2302 | } |
34e967a5 MC |
2303 | } |
2304 | ||
2305 | if (h->got.glist != NULL) | |
2306 | { | |
2307 | struct got_entry *list = h->got.glist; | |
2308 | ||
2309 | /* Traverse the list of got entries for this symbol. */ | |
2310 | while (list) | |
886a2506 | 2311 | { |
34e967a5 MC |
2312 | bfd_vma got_offset = h->got.glist->offset; |
2313 | ||
2314 | if (list->type == GOT_NORMAL | |
2315 | && list->created_dyn_relocation == FALSE) | |
2316 | { | |
2317 | if (bfd_link_pic (info) | |
2318 | && (info->symbolic || h->dynindx == -1) | |
2319 | && h->def_regular) | |
2320 | { | |
2321 | ADD_RELA (output_bfd, got, got_offset, 0, R_ARC_RELATIVE, 0); | |
2322 | } | |
94e5c971 CZ |
2323 | /* Do not fully understand the side effects of this condition. |
2324 | The relocation space might still being reserved. Perhaps | |
2325 | I should clear its value. */ | |
2326 | else if (h->dynindx != -1) | |
34e967a5 MC |
2327 | { |
2328 | ADD_RELA (output_bfd, got, got_offset, h->dynindx, | |
2329 | R_ARC_GLOB_DAT, 0); | |
2330 | } | |
2331 | list->created_dyn_relocation = TRUE; | |
2332 | } | |
33cbe6c0 | 2333 | else if (list->existing_entries != TLS_GOT_NONE) |
34e967a5 MC |
2334 | { |
2335 | struct elf_link_hash_table *htab = elf_hash_table (info); | |
2336 | enum tls_got_entries e = list->existing_entries; | |
2337 | ||
2338 | BFD_ASSERT (list->type != GOT_TLS_GD | |
33cbe6c0 | 2339 | || list->existing_entries == TLS_GOT_MOD_AND_OFF); |
34e967a5 | 2340 | |
840855c5 | 2341 | bfd_vma dynindx = h->dynindx == -1 ? 0 : h->dynindx; |
33cbe6c0 | 2342 | if (e == TLS_GOT_MOD_AND_OFF || e == TLS_GOT_MOD) |
34e967a5 | 2343 | { |
840855c5 | 2344 | ADD_RELA (output_bfd, got, got_offset, dynindx, |
34e967a5 MC |
2345 | R_ARC_TLS_DTPMOD, 0); |
2346 | ARC_DEBUG ("arc_info: TLS_DYNRELOC: type = %d, \ | |
2347 | GOT_OFFSET = 0x%x, GOT_VMA = 0x%x, INDEX = %d, ADDEND = 0x%x\n", | |
2348 | list->type, | |
2349 | got_offset, | |
2350 | htab->sgot->output_section->vma | |
2351 | + htab->sgot->output_offset + got_offset, | |
840855c5 | 2352 | dynindx, 0); |
34e967a5 | 2353 | } |
33cbe6c0 | 2354 | if (e == TLS_GOT_MOD_AND_OFF || e == TLS_GOT_OFF) |
34e967a5 MC |
2355 | { |
2356 | bfd_vma addend = 0; | |
2357 | if (list->type == GOT_TLS_IE) | |
2358 | addend = bfd_get_32 (output_bfd, | |
2359 | htab->sgot->contents + got_offset); | |
2360 | ||
2361 | ADD_RELA (output_bfd, got, | |
33cbe6c0 | 2362 | got_offset + (e == TLS_GOT_MOD_AND_OFF ? 4 : 0), |
840855c5 | 2363 | dynindx, |
34e967a5 MC |
2364 | (list->type == GOT_TLS_IE ? |
2365 | R_ARC_TLS_TPOFF : R_ARC_TLS_DTPOFF), | |
2366 | addend); | |
2367 | ||
2368 | ARC_DEBUG ("arc_info: TLS_DYNRELOC: type = %d, \ | |
2369 | GOT_OFFSET = 0x%x, GOT_VMA = 0x%x, INDEX = %d, ADDEND = 0x%x\n", | |
2370 | list->type, | |
2371 | got_offset, | |
2372 | htab->sgot->output_section->vma | |
2373 | + htab->sgot->output_offset + got_offset, | |
840855c5 | 2374 | dynindx, addend); |
34e967a5 MC |
2375 | } |
2376 | } | |
2377 | ||
2378 | list = list->next; | |
886a2506 | 2379 | } |
34e967a5 MC |
2380 | |
2381 | h->got.glist = NULL; | |
2382 | } | |
2383 | ||
2384 | if (h->needs_copy) | |
2385 | { | |
2386 | bfd_vma rel_offset = (h->root.u.def.value | |
2387 | + h->root.u.def.section->output_section->vma | |
2388 | + h->root.u.def.section->output_offset); | |
2389 | ||
2390 | asection *srelbss = | |
2391 | bfd_get_section_by_name (h->root.u.def.section->owner, | |
2392 | ".rela.bss"); | |
2393 | ||
23a42089 NC |
2394 | bfd_byte * loc = srelbss->contents |
2395 | + (srelbss->reloc_count * sizeof (Elf32_External_Rela)); | |
34e967a5 MC |
2396 | srelbss->reloc_count++; |
2397 | ||
2398 | Elf_Internal_Rela rel; | |
2399 | rel.r_addend = 0; | |
2400 | rel.r_offset = rel_offset; | |
94e5c971 CZ |
2401 | |
2402 | BFD_ASSERT (h->dynindx != -1); | |
34e967a5 MC |
2403 | rel.r_info = ELF32_R_INFO (h->dynindx, R_ARC_COPY); |
2404 | ||
23a42089 | 2405 | bfd_elf32_swap_reloca_out (output_bfd, &rel, loc); |
886a2506 NC |
2406 | } |
2407 | ||
2408 | /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */ | |
2409 | if (strcmp (h->root.root.string, "_DYNAMIC") == 0 | |
2410 | || strcmp (h->root.root.string, "__DYNAMIC") == 0 | |
2411 | || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0) | |
2412 | sym->st_shndx = SHN_ABS; | |
2413 | ||
2414 | return TRUE; | |
2415 | } | |
2416 | ||
4ade44b7 | 2417 | #define GET_SYMBOL_OR_SECTION(TAG, SYMBOL, SECTION) \ |
34e967a5 MC |
2418 | case TAG: \ |
2419 | if (SYMBOL != NULL) \ | |
4ade44b7 AM |
2420 | h = elf_link_hash_lookup (elf_hash_table (info), \ |
2421 | SYMBOL, FALSE, FALSE, TRUE); \ | |
34e967a5 | 2422 | else if (SECTION != NULL) \ |
4ade44b7 | 2423 | s = bfd_get_linker_section (dynobj, SECTION); \ |
34e967a5 | 2424 | break; |
886a2506 NC |
2425 | |
2426 | /* Function : elf_arc_finish_dynamic_sections | |
2427 | Brief : Finish up the dynamic sections handling. | |
2428 | Args : output_bfd : | |
34e967a5 MC |
2429 | info : |
2430 | h : | |
2431 | sym : | |
886a2506 | 2432 | Returns : True/False as the return status. */ |
34e967a5 | 2433 | |
886a2506 | 2434 | static bfd_boolean |
34e967a5 MC |
2435 | elf_arc_finish_dynamic_sections (bfd * output_bfd, |
2436 | struct bfd_link_info *info) | |
886a2506 NC |
2437 | { |
2438 | struct dynamic_sections ds = arc_create_dynamic_sections (output_bfd, info); | |
34e967a5 | 2439 | struct elf_link_hash_table *htab = elf_hash_table (info); |
886a2506 NC |
2440 | bfd *dynobj = (elf_hash_table (info))->dynobj; |
2441 | ||
2442 | if (ds.sdyn) | |
2443 | { | |
2444 | Elf32_External_Dyn *dyncon, *dynconend; | |
2445 | ||
2446 | dyncon = (Elf32_External_Dyn *) ds.sdyn->contents; | |
2447 | dynconend = | |
34e967a5 | 2448 | (Elf32_External_Dyn *) (ds.sdyn->contents + ds.sdyn->size); |
886a2506 NC |
2449 | for (; dyncon < dynconend; dyncon++) |
2450 | { | |
2451 | Elf_Internal_Dyn internal_dyn; | |
2452 | bfd_boolean do_it = FALSE; | |
2453 | ||
2454 | struct elf_link_hash_entry *h = NULL; | |
2455 | asection *s = NULL; | |
2456 | ||
2457 | bfd_elf32_swap_dyn_in (dynobj, dyncon, &internal_dyn); | |
2458 | ||
2459 | switch (internal_dyn.d_tag) | |
2460 | { | |
4ade44b7 AM |
2461 | GET_SYMBOL_OR_SECTION (DT_INIT, "_init", NULL) |
2462 | GET_SYMBOL_OR_SECTION (DT_FINI, "_fini", NULL) | |
2463 | GET_SYMBOL_OR_SECTION (DT_PLTGOT, NULL, ".plt") | |
2464 | GET_SYMBOL_OR_SECTION (DT_JMPREL, NULL, ".rela.plt") | |
2465 | GET_SYMBOL_OR_SECTION (DT_PLTRELSZ, NULL, ".rela.plt") | |
2466 | GET_SYMBOL_OR_SECTION (DT_RELASZ, NULL, ".rela.plt") | |
2467 | GET_SYMBOL_OR_SECTION (DT_VERSYM, NULL, ".gnu.version") | |
2468 | GET_SYMBOL_OR_SECTION (DT_VERDEF, NULL, ".gnu.version_d") | |
2469 | GET_SYMBOL_OR_SECTION (DT_VERNEED, NULL, ".gnu.version_r") | |
886a2506 NC |
2470 | default: |
2471 | break; | |
2472 | } | |
2473 | ||
34e967a5 | 2474 | /* In case the dynamic symbols should be updated with a symbol. */ |
886a2506 NC |
2475 | if (h != NULL |
2476 | && (h->root.type == bfd_link_hash_defined | |
34e967a5 | 2477 | || h->root.type == bfd_link_hash_defweak)) |
886a2506 NC |
2478 | { |
2479 | asection *asec_ptr; | |
2480 | ||
2481 | internal_dyn.d_un.d_val = h->root.u.def.value; | |
2482 | asec_ptr = h->root.u.def.section; | |
2483 | if (asec_ptr->output_section != NULL) | |
2484 | { | |
2485 | internal_dyn.d_un.d_val += | |
2486 | (asec_ptr->output_section->vma + | |
2487 | asec_ptr->output_offset); | |
2488 | } | |
2489 | else | |
2490 | { | |
34e967a5 MC |
2491 | /* The symbol is imported from another shared |
2492 | library and does not apply to this one. */ | |
886a2506 NC |
2493 | internal_dyn.d_un.d_val = 0; |
2494 | } | |
2495 | do_it = TRUE; | |
2496 | } | |
2497 | else if (s != NULL) /* With a section information. */ | |
2498 | { | |
2499 | switch (internal_dyn.d_tag) | |
2500 | { | |
2501 | case DT_PLTGOT: | |
2502 | case DT_JMPREL: | |
34e967a5 MC |
2503 | case DT_VERSYM: |
2504 | case DT_VERDEF: | |
2505 | case DT_VERNEED: | |
4ade44b7 AM |
2506 | internal_dyn.d_un.d_ptr = (s->output_section->vma |
2507 | + s->output_offset); | |
886a2506 NC |
2508 | do_it = TRUE; |
2509 | break; | |
2510 | ||
2511 | case DT_PLTRELSZ: | |
2512 | internal_dyn.d_un.d_val = s->size; | |
2513 | do_it = TRUE; | |
2514 | break; | |
2515 | ||
2516 | case DT_RELASZ: | |
34e967a5 MC |
2517 | if (s != NULL) |
2518 | internal_dyn.d_un.d_val -= s->size; | |
886a2506 NC |
2519 | do_it = TRUE; |
2520 | break; | |
2521 | ||
2522 | default: | |
2523 | break; | |
2524 | } | |
2525 | } | |
2526 | ||
4ade44b7 | 2527 | if (do_it) |
886a2506 NC |
2528 | bfd_elf32_swap_dyn_out (output_bfd, &internal_dyn, dyncon); |
2529 | } | |
2530 | ||
34e967a5 | 2531 | if (htab->splt->size > 0) |
886a2506 | 2532 | { |
34e967a5 | 2533 | relocate_plt_for_entry (output_bfd, info); |
886a2506 NC |
2534 | } |
2535 | ||
34e967a5 MC |
2536 | /* TODO: Validate this. */ |
2537 | elf_section_data (htab->srelplt->output_section)->this_hdr.sh_entsize | |
2538 | = 0xc; | |
886a2506 NC |
2539 | } |
2540 | ||
2541 | /* Fill in the first three entries in the global offset table. */ | |
34e967a5 | 2542 | if (htab->sgot) |
886a2506 | 2543 | { |
3b63d2ce CM |
2544 | struct elf_link_hash_entry *h; |
2545 | h = elf_link_hash_lookup (elf_hash_table (info), "_GLOBAL_OFFSET_TABLE_", | |
2546 | FALSE, FALSE, TRUE); | |
2547 | ||
2548 | if (h != NULL && h->root.type != bfd_link_hash_undefined | |
2549 | && h->root.u.def.section != NULL) | |
886a2506 | 2550 | { |
3b63d2ce CM |
2551 | asection *sec = h->root.u.def.section; |
2552 | ||
886a2506 NC |
2553 | if (ds.sdyn == NULL) |
2554 | bfd_put_32 (output_bfd, (bfd_vma) 0, | |
3b63d2ce | 2555 | sec->contents); |
886a2506 NC |
2556 | else |
2557 | bfd_put_32 (output_bfd, | |
2558 | ds.sdyn->output_section->vma + ds.sdyn->output_offset, | |
3b63d2ce CM |
2559 | sec->contents); |
2560 | bfd_put_32 (output_bfd, (bfd_vma) 0, sec->contents + 4); | |
2561 | bfd_put_32 (output_bfd, (bfd_vma) 0, sec->contents + 8); | |
886a2506 NC |
2562 | } |
2563 | } | |
2564 | ||
886a2506 NC |
2565 | return TRUE; |
2566 | } | |
2567 | ||
34e967a5 MC |
2568 | #define ADD_DYNAMIC_SYMBOL(NAME, TAG) \ |
2569 | h = elf_link_hash_lookup (elf_hash_table (info), \ | |
2570 | NAME, FALSE, FALSE, FALSE); \ | |
2571 | if ((h != NULL && (h->ref_regular || h->def_regular))) \ | |
2572 | if (! _bfd_elf_add_dynamic_entry (info, TAG, 0)) \ | |
886a2506 NC |
2573 | return FALSE; |
2574 | ||
2575 | /* Set the sizes of the dynamic sections. */ | |
2576 | static bfd_boolean | |
34e967a5 MC |
2577 | elf_arc_size_dynamic_sections (bfd * output_bfd, |
2578 | struct bfd_link_info *info) | |
886a2506 | 2579 | { |
34e967a5 | 2580 | bfd * dynobj; |
886a2506 | 2581 | asection * s; |
34e967a5 MC |
2582 | bfd_boolean relocs_exist = FALSE; |
2583 | bfd_boolean reltext_exist = FALSE; | |
886a2506 | 2584 | struct dynamic_sections ds = arc_create_dynamic_sections (output_bfd, info); |
34e967a5 | 2585 | struct elf_link_hash_table *htab = elf_hash_table (info); |
886a2506 NC |
2586 | |
2587 | dynobj = (elf_hash_table (info))->dynobj; | |
2588 | BFD_ASSERT (dynobj != NULL); | |
2589 | ||
2590 | if ((elf_hash_table (info))->dynamic_sections_created) | |
2591 | { | |
2592 | struct elf_link_hash_entry *h; | |
2593 | ||
34e967a5 MC |
2594 | /* Set the contents of the .interp section to the |
2595 | interpreter. */ | |
886a2506 NC |
2596 | if (!bfd_link_pic (info)) |
2597 | { | |
2598 | s = bfd_get_section_by_name (dynobj, ".interp"); | |
2599 | BFD_ASSERT (s != NULL); | |
34e967a5 | 2600 | s->size = sizeof (ELF_DYNAMIC_INTERPRETER); |
886a2506 NC |
2601 | s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER; |
2602 | } | |
2603 | ||
34e967a5 MC |
2604 | /* Add some entries to the .dynamic section. We fill in some of |
2605 | the values later, in elf_bfd_final_link, but we must add the | |
2606 | entries now so that we know the final size of the .dynamic | |
2607 | section. Checking if the .init section is present. We also | |
2608 | create DT_INIT and DT_FINI entries if the init_str has been | |
2609 | changed by the user. */ | |
886a2506 NC |
2610 | ADD_DYNAMIC_SYMBOL ("init", DT_INIT); |
2611 | ADD_DYNAMIC_SYMBOL ("fini", DT_FINI); | |
2612 | } | |
2613 | else | |
2614 | { | |
34e967a5 MC |
2615 | /* We may have created entries in the .rela.got section. |
2616 | However, if we are not creating the dynamic sections, we will | |
2617 | not actually use these entries. Reset the size of .rela.got, | |
2618 | which will cause it to get stripped from the output file | |
2619 | below. */ | |
2620 | if (htab->srelgot != NULL) | |
2621 | htab->srelgot->size = 0; | |
886a2506 NC |
2622 | } |
2623 | ||
34e967a5 MC |
2624 | if (htab->splt != NULL && htab->splt->size == 0) |
2625 | htab->splt->flags |= SEC_EXCLUDE; | |
886a2506 NC |
2626 | for (s = dynobj->sections; s != NULL; s = s->next) |
2627 | { | |
34e967a5 | 2628 | if ((s->flags & SEC_LINKER_CREATED) == 0) |
886a2506 NC |
2629 | continue; |
2630 | ||
34e967a5 | 2631 | if (strncmp (s->name, ".rela", 5) == 0) |
886a2506 | 2632 | { |
34e967a5 MC |
2633 | if (s->size == 0) |
2634 | { | |
2635 | s->flags |= SEC_EXCLUDE; | |
2636 | } | |
2637 | else | |
2638 | { | |
2639 | if (strcmp (s->name, ".rela.plt") != 0) | |
2640 | { | |
2641 | const char *outname = | |
2642 | bfd_get_section_name (output_bfd, | |
2643 | htab->srelplt->output_section); | |
2644 | ||
2645 | asection *target = bfd_get_section_by_name (output_bfd, | |
2646 | outname + 4); | |
2647 | ||
2648 | relocs_exist = TRUE; | |
2649 | if (target != NULL && target->size != 0 | |
2650 | && (target->flags & SEC_READONLY) != 0 | |
2651 | && (target->flags & SEC_ALLOC) != 0) | |
2652 | reltext_exist = TRUE; | |
2653 | } | |
2654 | } | |
886a2506 | 2655 | |
34e967a5 MC |
2656 | /* We use the reloc_count field as a counter if we need to |
2657 | copy relocs into the output file. */ | |
2658 | s->reloc_count = 0; | |
886a2506 | 2659 | } |
34e967a5 MC |
2660 | |
2661 | if (strcmp (s->name, ".dynamic") == 0) | |
2662 | continue; | |
2663 | ||
2664 | if (s->size != 0) | |
2665 | s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size); | |
2666 | ||
2667 | if (s->contents == NULL && s->size != 0) | |
2668 | return FALSE; | |
886a2506 NC |
2669 | } |
2670 | ||
2671 | if (ds.sdyn) | |
2672 | { | |
34e967a5 MC |
2673 | /* TODO: Check if this is needed. */ |
2674 | if (!bfd_link_pic (info)) | |
2675 | if (!_bfd_elf_add_dynamic_entry (info, DT_DEBUG, 0)) | |
2676 | return FALSE; | |
2677 | ||
2678 | if (htab->splt && (htab->splt->flags & SEC_EXCLUDE) == 0) | |
886a2506 NC |
2679 | if (!_bfd_elf_add_dynamic_entry (info, DT_PLTGOT, 0) |
2680 | || !_bfd_elf_add_dynamic_entry (info, DT_PLTRELSZ, 0) | |
2681 | || !_bfd_elf_add_dynamic_entry (info, DT_PLTREL, DT_RELA) | |
2682 | || !_bfd_elf_add_dynamic_entry (info, DT_JMPREL, 0) | |
2683 | ) | |
2684 | return FALSE; | |
2685 | ||
2686 | if (relocs_exist == TRUE) | |
2687 | if (!_bfd_elf_add_dynamic_entry (info, DT_RELA, 0) | |
2688 | || !_bfd_elf_add_dynamic_entry (info, DT_RELASZ, 0) | |
2ab2f40d | 2689 | || !_bfd_elf_add_dynamic_entry (info, DT_RELAENT, |
886a2506 NC |
2690 | sizeof (Elf32_External_Rela)) |
2691 | ) | |
2692 | return FALSE; | |
2693 | ||
2694 | if (reltext_exist == TRUE) | |
2695 | if (!_bfd_elf_add_dynamic_entry (info, DT_TEXTREL, 0)) | |
2696 | return FALSE; | |
2697 | } | |
2698 | ||
2699 | return TRUE; | |
2700 | } | |
2701 | ||
0f7f3789 CM |
2702 | |
2703 | /* Classify dynamic relocs such that -z combreloc can reorder and combine | |
2704 | them. */ | |
2705 | static enum elf_reloc_type_class | |
2706 | elf32_arc_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED, | |
2707 | const asection *rel_sec ATTRIBUTE_UNUSED, | |
2708 | const Elf_Internal_Rela *rela) | |
2709 | { | |
2710 | switch ((int) ELF32_R_TYPE (rela->r_info)) | |
2711 | { | |
2712 | case R_ARC_RELATIVE: | |
2713 | return reloc_class_relative; | |
2714 | case R_ARC_JMP_SLOT: | |
2715 | return reloc_class_plt; | |
2716 | case R_ARC_COPY: | |
2717 | return reloc_class_copy; | |
2718 | /* TODO: Needed in future to support ifunc. */ | |
2719 | /* | |
2720 | case R_ARC_IRELATIVE: | |
2721 | return reloc_class_ifunc; | |
2722 | */ | |
2723 | default: | |
2724 | return reloc_class_normal; | |
2725 | } | |
2726 | } | |
2727 | ||
34e967a5 MC |
2728 | const struct elf_size_info arc_elf32_size_info = |
2729 | { | |
2730 | sizeof (Elf32_External_Ehdr), | |
2731 | sizeof (Elf32_External_Phdr), | |
2732 | sizeof (Elf32_External_Shdr), | |
2733 | sizeof (Elf32_External_Rel), | |
2734 | sizeof (Elf32_External_Rela), | |
2735 | sizeof (Elf32_External_Sym), | |
2736 | sizeof (Elf32_External_Dyn), | |
2737 | sizeof (Elf_External_Note), | |
2738 | 4, | |
2739 | 1, | |
2740 | 32, 2, | |
2741 | ELFCLASS32, EV_CURRENT, | |
2742 | bfd_elf32_write_out_phdrs, | |
2743 | bfd_elf32_write_shdrs_and_ehdr, | |
2744 | bfd_elf32_checksum_contents, | |
2745 | bfd_elf32_write_relocs, | |
2746 | bfd_elf32_swap_symbol_in, | |
2747 | bfd_elf32_swap_symbol_out, | |
2748 | bfd_elf32_slurp_reloc_table, | |
2749 | bfd_elf32_slurp_symbol_table, | |
2750 | bfd_elf32_swap_dyn_in, | |
2751 | bfd_elf32_swap_dyn_out, | |
2752 | bfd_elf32_swap_reloc_in, | |
2753 | bfd_elf32_swap_reloc_out, | |
2754 | bfd_elf32_swap_reloca_in, | |
2755 | bfd_elf32_swap_reloca_out | |
2756 | }; | |
2757 | ||
2758 | #define elf_backend_size_info arc_elf32_size_info | |
2759 | ||
2760 | static struct bfd_link_hash_table * | |
2761 | arc_elf_link_hash_table_create (bfd *abfd) | |
2762 | { | |
2763 | struct elf_link_hash_table *htab; | |
2764 | ||
2765 | htab = bfd_zmalloc (sizeof (*htab)); | |
2766 | if (htab == NULL) | |
2767 | return NULL; | |
2768 | ||
2769 | if (!_bfd_elf_link_hash_table_init (htab, abfd, | |
2770 | _bfd_elf_link_hash_newfunc, | |
2771 | sizeof (struct elf_link_hash_entry), | |
2772 | GENERIC_ELF_DATA)) | |
2773 | { | |
2774 | free (htab); | |
2775 | return NULL; | |
2776 | } | |
2777 | ||
2778 | htab->init_got_refcount.refcount = 0; | |
2779 | htab->init_got_refcount.glist = NULL; | |
2780 | htab->init_got_offset.offset = 0; | |
2781 | htab->init_got_offset.glist = NULL; | |
2782 | return (struct bfd_link_hash_table *) htab; | |
2783 | } | |
2784 | ||
2785 | /* Hook called by the linker routine which adds symbols from an object | |
2786 | file. */ | |
2787 | ||
2788 | static bfd_boolean | |
2789 | elf_arc_add_symbol_hook (bfd * abfd, | |
2790 | struct bfd_link_info * info, | |
2791 | Elf_Internal_Sym * sym, | |
2792 | const char ** namep ATTRIBUTE_UNUSED, | |
2793 | flagword * flagsp ATTRIBUTE_UNUSED, | |
2794 | asection ** secp ATTRIBUTE_UNUSED, | |
2795 | bfd_vma * valp ATTRIBUTE_UNUSED) | |
2796 | { | |
a43942db | 2797 | if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC |
34e967a5 MC |
2798 | && (abfd->flags & DYNAMIC) == 0 |
2799 | && bfd_get_flavour (info->output_bfd) == bfd_target_elf_flavour) | |
a43942db | 2800 | elf_tdata (info->output_bfd)->has_gnu_symbols |= elf_gnu_symbol_ifunc; |
34e967a5 MC |
2801 | |
2802 | return TRUE; | |
2803 | } | |
886a2506 | 2804 | |
6d00b590 | 2805 | #define TARGET_LITTLE_SYM arc_elf32_le_vec |
47b0e7ad | 2806 | #define TARGET_LITTLE_NAME "elf32-littlearc" |
886a2506 NC |
2807 | #define TARGET_BIG_SYM arc_elf32_be_vec |
2808 | #define TARGET_BIG_NAME "elf32-bigarc" | |
2809 | #define ELF_ARCH bfd_arch_arc | |
2810 | #define ELF_MACHINE_CODE EM_ARC_COMPACT | |
2811 | #define ELF_MACHINE_ALT1 EM_ARC_COMPACT2 | |
2812 | #define ELF_MAXPAGESIZE 0x2000 | |
2813 | ||
34e967a5 MC |
2814 | #define bfd_elf32_bfd_link_hash_table_create arc_elf_link_hash_table_create |
2815 | ||
2816 | #define bfd_elf32_bfd_merge_private_bfd_data arc_elf_merge_private_bfd_data | |
2817 | #define bfd_elf32_bfd_reloc_type_lookup arc_elf32_bfd_reloc_type_lookup | |
2818 | #define bfd_elf32_bfd_set_private_flags arc_elf_set_private_flags | |
2819 | #define bfd_elf32_bfd_print_private_bfd_data arc_elf_print_private_bfd_data | |
2820 | #define bfd_elf32_bfd_copy_private_bfd_data arc_elf_copy_private_bfd_data | |
2821 | ||
886a2506 NC |
2822 | #define elf_info_to_howto_rel arc_info_to_howto_rel |
2823 | #define elf_backend_object_p arc_elf_object_p | |
2824 | #define elf_backend_final_write_processing arc_elf_final_write_processing | |
2825 | ||
2826 | #define elf_backend_relocate_section elf_arc_relocate_section | |
2827 | #define elf_backend_check_relocs elf_arc_check_relocs | |
2828 | #define elf_backend_create_dynamic_sections _bfd_elf_create_dynamic_sections | |
2829 | ||
0f7f3789 CM |
2830 | #define elf_backend_reloc_type_class elf32_arc_reloc_type_class |
2831 | ||
886a2506 NC |
2832 | #define elf_backend_adjust_dynamic_symbol elf_arc_adjust_dynamic_symbol |
2833 | #define elf_backend_finish_dynamic_symbol elf_arc_finish_dynamic_symbol | |
2834 | ||
2835 | #define elf_backend_finish_dynamic_sections elf_arc_finish_dynamic_sections | |
2836 | #define elf_backend_size_dynamic_sections elf_arc_size_dynamic_sections | |
34e967a5 | 2837 | #define elf_backend_add_symbol_hook elf_arc_add_symbol_hook |
886a2506 NC |
2838 | |
2839 | #define elf_backend_can_gc_sections 1 | |
2840 | #define elf_backend_want_got_plt 1 | |
2841 | #define elf_backend_plt_readonly 1 | |
34e967a5 | 2842 | #define elf_backend_rela_plts_and_copies_p 1 |
886a2506 NC |
2843 | #define elf_backend_want_plt_sym 0 |
2844 | #define elf_backend_got_header_size 12 | |
2845 | ||
2846 | #define elf_backend_may_use_rel_p 0 | |
2847 | #define elf_backend_may_use_rela_p 1 | |
2848 | #define elf_backend_default_use_rela_p 1 | |
252b5132 | 2849 | |
3c8adaca CZ |
2850 | #define elf_backend_default_execstack 0 |
2851 | ||
252b5132 | 2852 | #include "elf32-target.h" |