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Import binutils 2.18
[nacl-binutils.git] / bfd / elf32-iq2000.c
blob566bebded9cd173834cf22dbb8bb292a68e19b85
1 /* IQ2000-specific support for 32-bit ELF.
2 Copyright (C) 2003, 2004, 2005, 2006, 2007
3 Free Software Foundation, Inc.
4
5 This file is part of BFD, the Binary File Descriptor library.
6
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
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
11
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.
16
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
19 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */
20
21 #include "sysdep.h"
22 #include "bfd.h"
23 #include "libbfd.h"
24 #include "elf-bfd.h"
25 #include "elf/iq2000.h"
26
27 /* Forward declarations. */
28
29 static bfd_reloc_status_type iq2000_elf_howto_hi16_reloc (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
30
31 \f
32 static reloc_howto_type iq2000_elf_howto_table [] =
33 {
34 /* This reloc does nothing. */
35
36 HOWTO (R_IQ2000_NONE, /* type */
37 0, /* rightshift */
38 2, /* size (0 = byte, 1 = short, 2 = long) */
39 32, /* bitsize */
40 FALSE, /* pc_relative */
41 0, /* bitpos */
42 complain_overflow_bitfield, /* complain_on_overflow */
43 bfd_elf_generic_reloc, /* special_function */
44 "R_IQ2000_NONE", /* name */
45 FALSE, /* partial_inplace */
46 0, /* src_mask */
47 0, /* dst_mask */
48 FALSE), /* pcrel_offset */
49
50 /* A 16 bit absolute relocation. */
51 HOWTO (R_IQ2000_16, /* type */
52 0, /* rightshift */
53 1, /* size (0 = byte, 1 = short, 2 = long) */
54 16, /* bitsize */
55 FALSE, /* pc_relative */
56 0, /* bitpos */
57 complain_overflow_bitfield, /* complain_on_overflow */
58 bfd_elf_generic_reloc, /* special_function */
59 "R_IQ2000_16", /* name */
60 FALSE, /* partial_inplace */
61 0x0000, /* src_mask */
62 0xffff, /* dst_mask */
63 FALSE), /* pcrel_offset */
64
65 /* A 32 bit absolute relocation. */
66 HOWTO (R_IQ2000_32, /* type */
67 0, /* rightshift */
68 2, /* size (0 = byte, 1 = short, 2 = long) */
69 31, /* bitsize */
70 FALSE, /* pc_relative */
71 0, /* bitpos */
72 complain_overflow_bitfield, /* complain_on_overflow */
73 bfd_elf_generic_reloc, /* special_function */
74 "R_IQ2000_32", /* name */
75 FALSE, /* partial_inplace */
76 0x00000000, /* src_mask */
77 0x7fffffff, /* dst_mask */
78 FALSE), /* pcrel_offset */
79
80 /* 26 bit branch address. */
81 HOWTO (R_IQ2000_26, /* type */
82 2, /* rightshift */
83 2, /* size (0 = byte, 1 = short, 2 = long) */
84 26, /* bitsize */
85 FALSE, /* pc_relative */
86 0, /* bitpos */
87 complain_overflow_dont, /* complain_on_overflow */
88 /* This needs complex overflow
89 detection, because the upper four
90 bits must match the PC. */
91 bfd_elf_generic_reloc, /* special_function */
92 "R_IQ2000_26", /* name */
93 FALSE, /* partial_inplace */
94 0x00000000, /* src_mask */
95 0x03ffffff, /* dst_mask */
96 FALSE), /* pcrel_offset */
97
98 /* 16 bit PC relative reference. */
99 HOWTO (R_IQ2000_PC16, /* type */
100 2, /* rightshift */
101 2, /* size (0 = byte, 1 = short, 2 = long) */
102 16, /* bitsize */
103 TRUE, /* pc_relative */
104 0, /* bitpos */
105 complain_overflow_signed, /* complain_on_overflow */
106 bfd_elf_generic_reloc, /* special_function */
107 "R_IQ2000_PC16", /* name */
108 FALSE, /* partial_inplace */
109 0x0000, /* src_mask */
110 0xffff, /* dst_mask */
111 TRUE), /* pcrel_offset */
112
113 /* high 16 bits of symbol value. */
114 HOWTO (R_IQ2000_HI16, /* type */
115 16, /* rightshift */
116 2, /* size (0 = byte, 1 = short, 2 = long) */
117 15, /* bitsize */
118 FALSE, /* pc_relative */
119 0, /* bitpos */
120 complain_overflow_dont, /* complain_on_overflow */
121 iq2000_elf_howto_hi16_reloc, /* special_function */
122 "R_IQ2000_HI16", /* name */
123 FALSE, /* partial_inplace */
124 0x0000, /* src_mask */
125 0x7fff, /* dst_mask */
126 FALSE), /* pcrel_offset */
127
128 /* Low 16 bits of symbol value. */
129 HOWTO (R_IQ2000_LO16, /* type */
130 0, /* rightshift */
131 2, /* size (0 = byte, 1 = short, 2 = long) */
132 16, /* bitsize */
133 FALSE, /* pc_relative */
134 0, /* bitpos */
135 complain_overflow_dont, /* complain_on_overflow */
136 bfd_elf_generic_reloc, /* special_function */
137 "R_IQ2000_LO16", /* name */
138 FALSE, /* partial_inplace */
139 0x0000, /* src_mask */
140 0xffff, /* dst_mask */
141 FALSE), /* pcrel_offset */
142
143 /* 16-bit jump offset. */
144 HOWTO (R_IQ2000_OFFSET_16, /* type */
145 2, /* rightshift */
146 2, /* size (0 = byte, 1 = short, 2 = long) */
147 16, /* bitsize */
148 FALSE, /* pc_relative */
149 0, /* bitpos */
150 complain_overflow_dont, /* complain_on_overflow */
151 bfd_elf_generic_reloc, /* special_function */
152 "R_IQ2000_OFFSET_16", /* name */
153 FALSE, /* partial_inplace */
154 0x0000, /* src_mask */
155 0xffff, /* dst_mask */
156 FALSE), /* pcrel_offset */
157
158 /* 21-bit jump offset. */
159 HOWTO (R_IQ2000_OFFSET_21, /* type */
160 2, /* rightshift */
161 2, /* size (0 = byte, 1 = short, 2 = long) */
162 21, /* bitsize */
163 FALSE, /* pc_relative */
164 0, /* bitpos */
165 complain_overflow_dont, /* complain_on_overflow */
166 bfd_elf_generic_reloc, /* special_function */
167 "R_IQ2000_OFFSET_21", /* name */
168 FALSE, /* partial_inplace */
169 0x000000, /* src_mask */
170 0x1fffff, /* dst_mask */
171 FALSE), /* pcrel_offset */
172
173 /* unsigned high 16 bits of value. */
174 HOWTO (R_IQ2000_OFFSET_21, /* type */
175 16, /* rightshift */
176 2, /* size (0 = byte, 1 = short, 2 = long) */
177 16, /* bitsize */
178 FALSE, /* pc_relative */
179 0, /* bitpos */
180 complain_overflow_dont, /* complain_on_overflow */
181 bfd_elf_generic_reloc, /* special_function */
182 "R_IQ2000_UHI16", /* name */
183 FALSE, /* partial_inplace */
184 0x0000, /* src_mask */
185 0x7fff, /* dst_mask */
186 FALSE), /* pcrel_offset */
187
188 /* A 32 bit absolute debug relocation. */
189 HOWTO (R_IQ2000_32_DEBUG, /* type */
190 0, /* rightshift */
191 2, /* size (0 = byte, 1 = short, 2 = long) */
192 32, /* bitsize */
193 FALSE, /* pc_relative */
194 0, /* bitpos */
195 complain_overflow_bitfield, /* complain_on_overflow */
196 bfd_elf_generic_reloc, /* special_function */
197 "R_IQ2000_32", /* name */
198 FALSE, /* partial_inplace */
199 0x00000000, /* src_mask */
200 0xffffffff, /* dst_mask */
201 FALSE), /* pcrel_offset */
202
203 };
204
205 /* GNU extension to record C++ vtable hierarchy. */
206 static reloc_howto_type iq2000_elf_vtinherit_howto =
207 HOWTO (R_IQ2000_GNU_VTINHERIT, /* type */
208 0, /* rightshift */
209 2, /* size (0 = byte, 1 = short, 2 = long) */
210 0, /* bitsize */
211 FALSE, /* pc_relative */
212 0, /* bitpos */
213 complain_overflow_dont, /* complain_on_overflow */
214 NULL, /* special_function */
215 "R_IQ2000_GNU_VTINHERIT", /* name */
216 FALSE, /* partial_inplace */
217 0, /* src_mask */
218 0, /* dst_mask */
219 FALSE); /* pcrel_offset */
220
221 /* GNU extension to record C++ vtable member usage. */
222 static reloc_howto_type iq2000_elf_vtentry_howto =
223 HOWTO (R_IQ2000_GNU_VTENTRY, /* type */
224 0, /* rightshift */
225 2, /* size (0 = byte, 1 = short, 2 = long) */
226 0, /* bitsize */
227 FALSE, /* pc_relative */
228 0, /* bitpos */
229 complain_overflow_dont, /* complain_on_overflow */
230 NULL, /* special_function */
231 "R_IQ2000_GNU_VTENTRY", /* name */
232 FALSE, /* partial_inplace */
233 0, /* src_mask */
234 0, /* dst_mask */
235 FALSE); /* pcrel_offset */
236
237 \f
238 static bfd_reloc_status_type
239 iq2000_elf_howto_hi16_reloc (bfd *abfd ATTRIBUTE_UNUSED,
240 arelent *reloc_entry,
241 asymbol *symbol,
242 void * data,
243 asection *input_section,
244 bfd *output_bfd,
245 char **error_message ATTRIBUTE_UNUSED)
246 {
247 bfd_reloc_status_type ret;
248 bfd_vma relocation;
249
250 /* If we're relocating and this an external symbol,
251 we don't want to change anything. */
252 if (output_bfd != (bfd *) NULL
253 && (symbol->flags & BSF_SECTION_SYM) == 0
254 && reloc_entry->addend == 0)
255 {
256 reloc_entry->address += input_section->output_offset;
257 return bfd_reloc_ok;
258 }
259
260 if (bfd_is_com_section (symbol->section))
261 relocation = 0;
262 else
263 relocation = symbol->value;
264
265 relocation += symbol->section->output_section->vma;
266 relocation += symbol->section->output_offset;
267 relocation += reloc_entry->addend;
268
269 /* If %lo will have sign-extension, compensate by add 0x10000 to hi portion. */
270 if (relocation & 0x8000)
271 reloc_entry->addend += 0x10000;
272
273 /* Now do the reloc in the usual way. */
274 ret = bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
275 input_section, output_bfd, error_message);
276
277 /* Put it back the way it was. */
278 if (relocation & 0x8000)
279 reloc_entry->addend -= 0x10000;
280
281 return ret;
282 }
283
284 static bfd_reloc_status_type
285 iq2000_elf_relocate_hi16 (bfd *input_bfd,
286 Elf_Internal_Rela *relhi,
287 bfd_byte *contents,
288 bfd_vma value)
289 {
290 bfd_vma insn;
291
292 insn = bfd_get_32 (input_bfd, contents + relhi->r_offset);
293
294 value += relhi->r_addend;
295 value &= 0x7fffffff; /* Mask off top-bit which is Harvard mask bit. */
296
297 /* If top-bit of %lo value is on, this means that %lo will
298 sign-propagate and so we compensate by adding 1 to %hi value. */
299 if (value & 0x8000)
300 value += 0x10000;
301
302 value >>= 16;
303 insn = ((insn & ~0xFFFF) | value);
304
305 bfd_put_32 (input_bfd, insn, contents + relhi->r_offset);
306 return bfd_reloc_ok;
307 }
308
309 /* Map BFD reloc types to IQ2000 ELF reloc types. */
310
311 static reloc_howto_type *
312 iq2000_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
313 bfd_reloc_code_real_type code)
314 {
315 /* Note that the iq2000_elf_howto_table is indxed by the R_
316 constants. Thus, the order that the howto records appear in the
317 table *must* match the order of the relocation types defined in
318 include/elf/iq2000.h. */
319
320 switch (code)
321 {
322 case BFD_RELOC_NONE:
323 return &iq2000_elf_howto_table[ (int) R_IQ2000_NONE];
324 case BFD_RELOC_16:
325 return &iq2000_elf_howto_table[ (int) R_IQ2000_16];
326 case BFD_RELOC_32:
327 return &iq2000_elf_howto_table[ (int) R_IQ2000_32];
328 case BFD_RELOC_MIPS_JMP:
329 return &iq2000_elf_howto_table[ (int) R_IQ2000_26];
330 case BFD_RELOC_IQ2000_OFFSET_16:
331 return &iq2000_elf_howto_table[ (int) R_IQ2000_OFFSET_16];
332 case BFD_RELOC_IQ2000_OFFSET_21:
333 return &iq2000_elf_howto_table[ (int) R_IQ2000_OFFSET_21];
334 case BFD_RELOC_16_PCREL_S2:
335 return &iq2000_elf_howto_table[ (int) R_IQ2000_PC16];
336 case BFD_RELOC_HI16:
337 return &iq2000_elf_howto_table[ (int) R_IQ2000_HI16];
338 case BFD_RELOC_IQ2000_UHI16:
339 return &iq2000_elf_howto_table[ (int) R_IQ2000_UHI16];
340 case BFD_RELOC_LO16:
341 return &iq2000_elf_howto_table[ (int) R_IQ2000_LO16];
342 case BFD_RELOC_VTABLE_INHERIT:
343 return &iq2000_elf_vtinherit_howto;
344 case BFD_RELOC_VTABLE_ENTRY:
345 return &iq2000_elf_vtentry_howto;
346 default:
347 /* Pacify gcc -Wall. */
348 return NULL;
349 }
350 return NULL;
351 }
352
353 static reloc_howto_type *
354 iq2000_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, const char *r_name)
355 {
356 unsigned int i;
357
358 for (i = 0;
359 i < (sizeof (iq2000_elf_howto_table)
360 / sizeof (iq2000_elf_howto_table[0]));
361 i++)
362 if (iq2000_elf_howto_table[i].name != NULL
363 && strcasecmp (iq2000_elf_howto_table[i].name, r_name) == 0)
364 return &iq2000_elf_howto_table[i];
365
366 if (strcasecmp (iq2000_elf_vtinherit_howto.name, r_name) == 0)
367 return &iq2000_elf_vtinherit_howto;
368 if (strcasecmp (iq2000_elf_vtentry_howto.name, r_name) == 0)
369 return &iq2000_elf_vtentry_howto;
370
371 return NULL;
372 }
373 \f
374 /* Perform a single relocation. By default we use the standard BFD
375 routines. */
376
377 static bfd_reloc_status_type
378 iq2000_final_link_relocate (reloc_howto_type * howto,
379 bfd * input_bfd,
380 asection * input_section,
381 bfd_byte * contents,
382 Elf_Internal_Rela * rel,
383 bfd_vma relocation)
384 {
385 return _bfd_final_link_relocate (howto, input_bfd, input_section,
386 contents, rel->r_offset,
387 relocation, rel->r_addend);
388 }
389 \f
390 /* Set the howto pointer for a IQ2000 ELF reloc. */
391
392 static void
393 iq2000_info_to_howto_rela (bfd * abfd ATTRIBUTE_UNUSED,
394 arelent * cache_ptr,
395 Elf_Internal_Rela * dst)
396 {
397 unsigned int r_type;
398
399 r_type = ELF32_R_TYPE (dst->r_info);
400 switch (r_type)
401 {
402 case R_IQ2000_GNU_VTINHERIT:
403 cache_ptr->howto = & iq2000_elf_vtinherit_howto;
404 break;
405
406 case R_IQ2000_GNU_VTENTRY:
407 cache_ptr->howto = & iq2000_elf_vtentry_howto;
408 break;
409
410 default:
411 cache_ptr->howto = & iq2000_elf_howto_table [r_type];
412 break;
413 }
414 }
415
416 /* Look through the relocs for a section during the first phase.
417 Since we don't do .gots or .plts, we just need to consider the
418 virtual table relocs for gc. */
419
420 static bfd_boolean
421 iq2000_elf_check_relocs (bfd *abfd,
422 struct bfd_link_info *info,
423 asection *sec,
424 const Elf_Internal_Rela *relocs)
425 {
426 Elf_Internal_Shdr *symtab_hdr;
427 struct elf_link_hash_entry **sym_hashes, **sym_hashes_end;
428 const Elf_Internal_Rela *rel;
429 const Elf_Internal_Rela *rel_end;
430 bfd_boolean changed = FALSE;
431
432 if (info->relocatable)
433 return TRUE;
434
435 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
436 sym_hashes = elf_sym_hashes (abfd);
437 sym_hashes_end = sym_hashes + symtab_hdr->sh_size / sizeof (Elf32_External_Sym);
438 if (!elf_bad_symtab (abfd))
439 sym_hashes_end -= symtab_hdr->sh_info;
440
441 rel_end = relocs + sec->reloc_count;
442 for (rel = relocs; rel < rel_end; rel++)
443 {
444 struct elf_link_hash_entry *h;
445 unsigned long r_symndx;
446
447 r_symndx = ELF32_R_SYM (rel->r_info);
448 if (r_symndx < symtab_hdr->sh_info)
449 h = NULL;
450 else
451 {
452 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
453 while (h->root.type == bfd_link_hash_indirect
454 || h->root.type == bfd_link_hash_warning)
455 h = (struct elf_link_hash_entry *) h->root.u.i.link;
456 }
457
458 switch (ELF32_R_TYPE (rel->r_info))
459 {
460 /* This relocation describes the C++ object vtable
461 hierarchy. Reconstruct it for later use during GC. */
462 case R_IQ2000_GNU_VTINHERIT:
463 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
464 return FALSE;
465 break;
466
467 /* This relocation describes which C++ vtable entries
468 are actually used. Record for later use during GC. */
469 case R_IQ2000_GNU_VTENTRY:
470 if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
471 return FALSE;
472 break;
473
474 case R_IQ2000_32:
475 /* For debug section, change to special harvard-aware relocations. */
476 if (CONST_STRNEQ (sec->name, ".debug")
477 || CONST_STRNEQ (sec->name, ".stab")
478 || CONST_STRNEQ (sec->name, ".eh_frame"))
479 {
480 ((Elf_Internal_Rela *) rel)->r_info
481 = ELF32_R_INFO (ELF32_R_SYM (rel->r_info), R_IQ2000_32_DEBUG);
482 changed = TRUE;
483 }
484 break;
485 }
486 }
487
488 if (changed)
489 /* Note that we've changed relocs, otherwise if !info->keep_memory
490 we'll free the relocs and lose our changes. */
491 elf_section_data (sec)->relocs = (Elf_Internal_Rela *) relocs;
492
493 return TRUE;
494 }
495
496 \f
497 /* Relocate a IQ2000 ELF section.
498 There is some attempt to make this function usable for many architectures,
499 both USE_REL and USE_RELA ['twould be nice if such a critter existed],
500 if only to serve as a learning tool.
501
502 The RELOCATE_SECTION function is called by the new ELF backend linker
503 to handle the relocations for a section.
504
505 The relocs are always passed as Rela structures; if the section
506 actually uses Rel structures, the r_addend field will always be
507 zero.
508
509 This function is responsible for adjusting the section contents as
510 necessary, and (if using Rela relocs and generating a relocatable
511 output file) adjusting the reloc addend as necessary.
512
513 This function does not have to worry about setting the reloc
514 address or the reloc symbol index.
515
516 LOCAL_SYMS is a pointer to the swapped in local symbols.
517
518 LOCAL_SECTIONS is an array giving the section in the input file
519 corresponding to the st_shndx field of each local symbol.
520
521 The global hash table entry for the global symbols can be found
522 via elf_sym_hashes (input_bfd).
523
524 When generating relocatable output, this function must handle
525 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
526 going to be the section symbol corresponding to the output
527 section, which means that the addend must be adjusted
528 accordingly. */
529
530 static bfd_boolean
531 iq2000_elf_relocate_section (bfd * output_bfd ATTRIBUTE_UNUSED,
532 struct bfd_link_info * info,
533 bfd * input_bfd,
534 asection * input_section,
535 bfd_byte * contents,
536 Elf_Internal_Rela * relocs,
537 Elf_Internal_Sym * local_syms,
538 asection ** local_sections)
539 {
540 Elf_Internal_Shdr * symtab_hdr;
541 struct elf_link_hash_entry ** sym_hashes;
542 Elf_Internal_Rela * rel;
543 Elf_Internal_Rela * relend;
544
545 symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr;
546 sym_hashes = elf_sym_hashes (input_bfd);
547 relend = relocs + input_section->reloc_count;
548
549 for (rel = relocs; rel < relend; rel ++)
550 {
551 reloc_howto_type * howto;
552 unsigned long r_symndx;
553 Elf_Internal_Sym * sym;
554 asection * sec;
555 struct elf_link_hash_entry * h;
556 bfd_vma relocation;
557 bfd_reloc_status_type r;
558 const char * name = NULL;
559 int r_type;
560
561 r_type = ELF32_R_TYPE (rel->r_info);
562
563 if ( r_type == R_IQ2000_GNU_VTINHERIT
564 || r_type == R_IQ2000_GNU_VTENTRY)
565 continue;
566
567 r_symndx = ELF32_R_SYM (rel->r_info);
568
569 howto = iq2000_elf_howto_table + ELF32_R_TYPE (rel->r_info);
570 h = NULL;
571 sym = NULL;
572 sec = NULL;
573
574 if (r_symndx < symtab_hdr->sh_info)
575 {
576 sym = local_syms + r_symndx;
577 sec = local_sections [r_symndx];
578 relocation = (sec->output_section->vma
579 + sec->output_offset
580 + sym->st_value);
581
582 name = bfd_elf_string_from_elf_section
583 (input_bfd, symtab_hdr->sh_link, sym->st_name);
584 name = (name == NULL) ? bfd_section_name (input_bfd, sec) : name;
585 }
586 else
587 {
588 bfd_boolean unresolved_reloc;
589 bfd_boolean warned;
590
591 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
592 r_symndx, symtab_hdr, sym_hashes,
593 h, sec, relocation,
594 unresolved_reloc, warned);
595
596 name = h->root.root.string;
597 }
598
599 if (sec != NULL && elf_discarded_section (sec))
600 {
601 /* For relocs against symbols from removed linkonce sections,
602 or sections discarded by a linker script, we just want the
603 section contents zeroed. Avoid any special processing. */
604 _bfd_clear_contents (howto, input_bfd, contents + rel->r_offset);
605 rel->r_info = 0;
606 rel->r_addend = 0;
607 continue;
608 }
609
610 if (info->relocatable)
611 continue;
612
613 switch (r_type)
614 {
615 case R_IQ2000_HI16:
616 r = iq2000_elf_relocate_hi16 (input_bfd, rel, contents, relocation);
617 break;
618
619 case R_IQ2000_PC16:
620 rel->r_addend -= 4;
621 /* Fall through. */
622
623 default:
624 r = iq2000_final_link_relocate (howto, input_bfd, input_section,
625 contents, rel, relocation);
626 break;
627 }
628
629 if (r != bfd_reloc_ok)
630 {
631 const char * msg = (const char *) NULL;
632
633 switch (r)
634 {
635 case bfd_reloc_overflow:
636 r = info->callbacks->reloc_overflow
637 (info, (h ? &h->root : NULL), name, howto->name,
638 (bfd_vma) 0, input_bfd, input_section, rel->r_offset);
639 break;
640
641 case bfd_reloc_undefined:
642 r = info->callbacks->undefined_symbol
643 (info, name, input_bfd, input_section, rel->r_offset, TRUE);
644 break;
645
646 case bfd_reloc_outofrange:
647 msg = _("internal error: out of range error");
648 break;
649
650 case bfd_reloc_notsupported:
651 msg = _("internal error: unsupported relocation error");
652 break;
653
654 case bfd_reloc_dangerous:
655 msg = _("internal error: dangerous relocation");
656 break;
657
658 default:
659 msg = _("internal error: unknown error");
660 break;
661 }
662
663 if (msg)
664 r = info->callbacks->warning
665 (info, msg, name, input_bfd, input_section, rel->r_offset);
666
667 if (! r)
668 return FALSE;
669 }
670 }
671
672 return TRUE;
673 }
674 \f
675
676 /* Return the section that should be marked against GC for a given
677 relocation. */
678
679 static asection *
680 iq2000_elf_gc_mark_hook (asection *sec,
681 struct bfd_link_info *info,
682 Elf_Internal_Rela *rel,
683 struct elf_link_hash_entry *h,
684 Elf_Internal_Sym *sym)
685 {
686 if (h != NULL)
687 switch (ELF32_R_TYPE (rel->r_info))
688 {
689 case R_IQ2000_GNU_VTINHERIT:
690 case R_IQ2000_GNU_VTENTRY:
691 return NULL;
692 }
693
694 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
695 }
696
697 \f
698 /* Return the MACH for an e_flags value. */
699
700 static int
701 elf32_iq2000_machine (bfd *abfd)
702 {
703 switch (elf_elfheader (abfd)->e_flags & EF_IQ2000_CPU_MASK)
704 {
705 case EF_IQ2000_CPU_IQ10:
706 return bfd_mach_iq10;
707
708 case EF_IQ2000_CPU_IQ2000:
709 default:
710 return bfd_mach_iq2000;
711 }
712 }
713
714 \f
715 /* Function to set the ELF flag bits. */
716
717 static bfd_boolean
718 iq2000_elf_set_private_flags (bfd *abfd, flagword flags)
719 {
720 elf_elfheader (abfd)->e_flags = flags;
721 elf_flags_init (abfd) = TRUE;
722 return TRUE;
723 }
724
725 /* Copy backend specific data from one object module to another. */
726
727 static bfd_boolean
728 iq2000_elf_copy_private_bfd_data (bfd *ibfd, bfd *obfd)
729 {
730 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
731 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
732 return TRUE;
733
734 BFD_ASSERT (!elf_flags_init (obfd)
735 || elf_elfheader (obfd)->e_flags == elf_elfheader (ibfd)->e_flags);
736
737 elf_elfheader (obfd)->e_flags = elf_elfheader (ibfd)->e_flags;
738 elf_flags_init (obfd) = TRUE;
739
740 /* Copy object attributes. */
741 _bfd_elf_copy_obj_attributes (ibfd, obfd);
742
743 return TRUE;
744 }
745
746 /* Merge backend specific data from an object
747 file to the output object file when linking. */
748
749 static bfd_boolean
750 iq2000_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
751 {
752 flagword old_flags, old_partial;
753 flagword new_flags, new_partial;
754 bfd_boolean error = FALSE;
755 char new_opt[80];
756 char old_opt[80];
757
758 new_opt[0] = old_opt[0] = '\0';
759 new_flags = elf_elfheader (ibfd)->e_flags;
760 old_flags = elf_elfheader (obfd)->e_flags;
761
762 if (!elf_flags_init (obfd))
763 {
764 /* First call, no flags set. */
765 elf_flags_init (obfd) = TRUE;
766 elf_elfheader (obfd)->e_flags = new_flags;
767 }
768
769 else if (new_flags != old_flags)
770 {
771 /* Warn if different cpu is used, but allow a
772 specific cpu to override the generic cpu. */
773 new_partial = (new_flags & EF_IQ2000_CPU_MASK);
774 old_partial = (old_flags & EF_IQ2000_CPU_MASK);
775
776 if (new_partial != old_partial)
777 {
778 switch (new_partial)
779 {
780 case EF_IQ2000_CPU_IQ10:
781 strcat (new_opt, " -m10");
782 break;
783
784 default:
785 case EF_IQ2000_CPU_IQ2000:
786 strcat (new_opt, " -m2000");
787 break;
788 }
789
790 switch (old_partial)
791 {
792 case EF_IQ2000_CPU_IQ10:
793 strcat (old_opt, " -m10");
794 break;
795
796 default:
797 case EF_IQ2000_CPU_IQ2000:
798 strcat (old_opt, " -m2000");
799 break;
800 }
801 }
802
803 /* Print out any mismatches from above. */
804 if (new_opt[0])
805 {
806 error = TRUE;
807 _bfd_error_handler
808 (_("%s: compiled with %s and linked with modules compiled with %s"),
809 bfd_get_filename (ibfd), new_opt, old_opt);
810 }
811
812 new_flags &= ~ EF_IQ2000_ALL_FLAGS;
813 old_flags &= ~ EF_IQ2000_ALL_FLAGS;
814
815 /* Warn about any other mismatches. */
816 if (new_flags != old_flags)
817 {
818 error = TRUE;
819
820 _bfd_error_handler
821 (_("%s: uses different e_flags (0x%lx) fields than previous modules (0x%lx)"),
822 bfd_get_filename (ibfd), (long)new_flags, (long)old_flags);
823 }
824 }
825
826 if (error)
827 bfd_set_error (bfd_error_bad_value);
828
829 return !error;
830 }
831
832 \f
833 static bfd_boolean
834 iq2000_elf_print_private_bfd_data (bfd *abfd, void * ptr)
835 {
836 FILE *file = (FILE *) ptr;
837 flagword flags;
838
839 BFD_ASSERT (abfd != NULL && ptr != NULL);
840
841 /* Print normal ELF private data. */
842 _bfd_elf_print_private_bfd_data (abfd, ptr);
843
844 flags = elf_elfheader (abfd)->e_flags;
845 fprintf (file, _("private flags = 0x%lx:"), (long)flags);
846
847 switch (flags & EF_IQ2000_CPU_MASK)
848 {
849 case EF_IQ2000_CPU_IQ10:
850 fprintf (file, " -m10");
851 break;
852 case EF_IQ2000_CPU_IQ2000:
853 fprintf (file, " -m2000");
854 break;
855 default:
856 break;
857 }
858
859 fputc ('\n', file);
860 return TRUE;
861 }
862
863 static
864 bfd_boolean
865 iq2000_elf_object_p (bfd *abfd)
866 {
867 bfd_default_set_arch_mach (abfd, bfd_arch_iq2000,
868 elf32_iq2000_machine (abfd));
869 return TRUE;
870 }
871
872 \f
873 #define ELF_ARCH bfd_arch_iq2000
874 #define ELF_MACHINE_CODE EM_IQ2000
875 #define ELF_MAXPAGESIZE 0x1000
876
877 #define TARGET_BIG_SYM bfd_elf32_iq2000_vec
878 #define TARGET_BIG_NAME "elf32-iq2000"
879
880 #define elf_info_to_howto_rel NULL
881 #define elf_info_to_howto iq2000_info_to_howto_rela
882 #define elf_backend_relocate_section iq2000_elf_relocate_section
883 #define elf_backend_gc_mark_hook iq2000_elf_gc_mark_hook
884 #define elf_backend_check_relocs iq2000_elf_check_relocs
885 #define elf_backend_object_p iq2000_elf_object_p
886 #define elf_backend_rela_normal 1
887
888 #define elf_backend_can_gc_sections 1
889
890 #define bfd_elf32_bfd_reloc_type_lookup iq2000_reloc_type_lookup
891 #define bfd_elf32_bfd_reloc_name_lookup iq2000_reloc_name_lookup
892 #define bfd_elf32_bfd_set_private_flags iq2000_elf_set_private_flags
893 #define bfd_elf32_bfd_copy_private_bfd_data iq2000_elf_copy_private_bfd_data
894 #define bfd_elf32_bfd_merge_private_bfd_data iq2000_elf_merge_private_bfd_data
895 #define bfd_elf32_bfd_print_private_bfd_data iq2000_elf_print_private_bfd_data
896
897 #include "elf32-target.h"
binutils for building for Google Native Client (NaCl)