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bfd/
[deliverable/binutils-gdb.git] / bfd / elf32-iq2000.c
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 BFD_ASSERT (h != NULL);
471 if (h != NULL
472 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
473 return FALSE;
474 break;
475
476 case R_IQ2000_32:
477 /* For debug section, change to special harvard-aware relocations. */
478 if (CONST_STRNEQ (sec->name, ".debug")
479 || CONST_STRNEQ (sec->name, ".stab")
480 || CONST_STRNEQ (sec->name, ".eh_frame"))
481 {
482 ((Elf_Internal_Rela *) rel)->r_info
483 = ELF32_R_INFO (ELF32_R_SYM (rel->r_info), R_IQ2000_32_DEBUG);
484 changed = TRUE;
485 }
486 break;
487 }
488 }
489
490 if (changed)
491 /* Note that we've changed relocs, otherwise if !info->keep_memory
492 we'll free the relocs and lose our changes. */
493 elf_section_data (sec)->relocs = (Elf_Internal_Rela *) relocs;
494
495 return TRUE;
496 }
497
498 \f
499 /* Relocate a IQ2000 ELF section.
500 There is some attempt to make this function usable for many architectures,
501 both USE_REL and USE_RELA ['twould be nice if such a critter existed],
502 if only to serve as a learning tool.
503
504 The RELOCATE_SECTION function is called by the new ELF backend linker
505 to handle the relocations for a section.
506
507 The relocs are always passed as Rela structures; if the section
508 actually uses Rel structures, the r_addend field will always be
509 zero.
510
511 This function is responsible for adjusting the section contents as
512 necessary, and (if using Rela relocs and generating a relocatable
513 output file) adjusting the reloc addend as necessary.
514
515 This function does not have to worry about setting the reloc
516 address or the reloc symbol index.
517
518 LOCAL_SYMS is a pointer to the swapped in local symbols.
519
520 LOCAL_SECTIONS is an array giving the section in the input file
521 corresponding to the st_shndx field of each local symbol.
522
523 The global hash table entry for the global symbols can be found
524 via elf_sym_hashes (input_bfd).
525
526 When generating relocatable output, this function must handle
527 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
528 going to be the section symbol corresponding to the output
529 section, which means that the addend must be adjusted
530 accordingly. */
531
532 static bfd_boolean
533 iq2000_elf_relocate_section (bfd * output_bfd ATTRIBUTE_UNUSED,
534 struct bfd_link_info * info,
535 bfd * input_bfd,
536 asection * input_section,
537 bfd_byte * contents,
538 Elf_Internal_Rela * relocs,
539 Elf_Internal_Sym * local_syms,
540 asection ** local_sections)
541 {
542 Elf_Internal_Shdr * symtab_hdr;
543 struct elf_link_hash_entry ** sym_hashes;
544 Elf_Internal_Rela * rel;
545 Elf_Internal_Rela * relend;
546
547 symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr;
548 sym_hashes = elf_sym_hashes (input_bfd);
549 relend = relocs + input_section->reloc_count;
550
551 for (rel = relocs; rel < relend; rel ++)
552 {
553 reloc_howto_type * howto;
554 unsigned long r_symndx;
555 Elf_Internal_Sym * sym;
556 asection * sec;
557 struct elf_link_hash_entry * h;
558 bfd_vma relocation;
559 bfd_reloc_status_type r;
560 const char * name = NULL;
561 int r_type;
562
563 r_type = ELF32_R_TYPE (rel->r_info);
564
565 if ( r_type == R_IQ2000_GNU_VTINHERIT
566 || r_type == R_IQ2000_GNU_VTENTRY)
567 continue;
568
569 r_symndx = ELF32_R_SYM (rel->r_info);
570
571 howto = iq2000_elf_howto_table + ELF32_R_TYPE (rel->r_info);
572 h = NULL;
573 sym = NULL;
574 sec = NULL;
575
576 if (r_symndx < symtab_hdr->sh_info)
577 {
578 sym = local_syms + r_symndx;
579 sec = local_sections [r_symndx];
580 relocation = (sec->output_section->vma
581 + sec->output_offset
582 + sym->st_value);
583
584 name = bfd_elf_string_from_elf_section
585 (input_bfd, symtab_hdr->sh_link, sym->st_name);
586 name = (name == NULL) ? bfd_section_name (input_bfd, sec) : name;
587 }
588 else
589 {
590 bfd_boolean unresolved_reloc;
591 bfd_boolean warned;
592
593 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
594 r_symndx, symtab_hdr, sym_hashes,
595 h, sec, relocation,
596 unresolved_reloc, warned);
597
598 name = h->root.root.string;
599 }
600
601 if (sec != NULL && elf_discarded_section (sec))
602 {
603 /* For relocs against symbols from removed linkonce sections,
604 or sections discarded by a linker script, we just want the
605 section contents zeroed. Avoid any special processing. */
606 _bfd_clear_contents (howto, input_bfd, contents + rel->r_offset);
607 rel->r_info = 0;
608 rel->r_addend = 0;
609 continue;
610 }
611
612 if (info->relocatable)
613 continue;
614
615 switch (r_type)
616 {
617 case R_IQ2000_HI16:
618 r = iq2000_elf_relocate_hi16 (input_bfd, rel, contents, relocation);
619 break;
620
621 case R_IQ2000_PC16:
622 rel->r_addend -= 4;
623 /* Fall through. */
624
625 default:
626 r = iq2000_final_link_relocate (howto, input_bfd, input_section,
627 contents, rel, relocation);
628 break;
629 }
630
631 if (r != bfd_reloc_ok)
632 {
633 const char * msg = (const char *) NULL;
634
635 switch (r)
636 {
637 case bfd_reloc_overflow:
638 r = info->callbacks->reloc_overflow
639 (info, (h ? &h->root : NULL), name, howto->name,
640 (bfd_vma) 0, input_bfd, input_section, rel->r_offset);
641 break;
642
643 case bfd_reloc_undefined:
644 r = info->callbacks->undefined_symbol
645 (info, name, input_bfd, input_section, rel->r_offset, TRUE);
646 break;
647
648 case bfd_reloc_outofrange:
649 msg = _("internal error: out of range error");
650 break;
651
652 case bfd_reloc_notsupported:
653 msg = _("internal error: unsupported relocation error");
654 break;
655
656 case bfd_reloc_dangerous:
657 msg = _("internal error: dangerous relocation");
658 break;
659
660 default:
661 msg = _("internal error: unknown error");
662 break;
663 }
664
665 if (msg)
666 r = info->callbacks->warning
667 (info, msg, name, input_bfd, input_section, rel->r_offset);
668
669 if (! r)
670 return FALSE;
671 }
672 }
673
674 return TRUE;
675 }
676 \f
677
678 /* Return the section that should be marked against GC for a given
679 relocation. */
680
681 static asection *
682 iq2000_elf_gc_mark_hook (asection *sec,
683 struct bfd_link_info *info,
684 Elf_Internal_Rela *rel,
685 struct elf_link_hash_entry *h,
686 Elf_Internal_Sym *sym)
687 {
688 if (h != NULL)
689 switch (ELF32_R_TYPE (rel->r_info))
690 {
691 case R_IQ2000_GNU_VTINHERIT:
692 case R_IQ2000_GNU_VTENTRY:
693 return NULL;
694 }
695
696 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
697 }
698
699 \f
700 /* Return the MACH for an e_flags value. */
701
702 static int
703 elf32_iq2000_machine (bfd *abfd)
704 {
705 switch (elf_elfheader (abfd)->e_flags & EF_IQ2000_CPU_MASK)
706 {
707 case EF_IQ2000_CPU_IQ10:
708 return bfd_mach_iq10;
709
710 case EF_IQ2000_CPU_IQ2000:
711 default:
712 return bfd_mach_iq2000;
713 }
714 }
715
716 \f
717 /* Function to set the ELF flag bits. */
718
719 static bfd_boolean
720 iq2000_elf_set_private_flags (bfd *abfd, flagword flags)
721 {
722 elf_elfheader (abfd)->e_flags = flags;
723 elf_flags_init (abfd) = TRUE;
724 return TRUE;
725 }
726
727 /* Copy backend specific data from one object module to another. */
728
729 static bfd_boolean
730 iq2000_elf_copy_private_bfd_data (bfd *ibfd, bfd *obfd)
731 {
732 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
733 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
734 return TRUE;
735
736 BFD_ASSERT (!elf_flags_init (obfd)
737 || elf_elfheader (obfd)->e_flags == elf_elfheader (ibfd)->e_flags);
738
739 elf_elfheader (obfd)->e_flags = elf_elfheader (ibfd)->e_flags;
740 elf_flags_init (obfd) = TRUE;
741
742 /* Copy object attributes. */
743 _bfd_elf_copy_obj_attributes (ibfd, obfd);
744
745 return TRUE;
746 }
747
748 /* Merge backend specific data from an object
749 file to the output object file when linking. */
750
751 static bfd_boolean
752 iq2000_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
753 {
754 flagword old_flags, old_partial;
755 flagword new_flags, new_partial;
756 bfd_boolean error = FALSE;
757 char new_opt[80];
758 char old_opt[80];
759
760 new_opt[0] = old_opt[0] = '\0';
761 new_flags = elf_elfheader (ibfd)->e_flags;
762 old_flags = elf_elfheader (obfd)->e_flags;
763
764 if (!elf_flags_init (obfd))
765 {
766 /* First call, no flags set. */
767 elf_flags_init (obfd) = TRUE;
768 elf_elfheader (obfd)->e_flags = new_flags;
769 }
770
771 else if (new_flags != old_flags)
772 {
773 /* Warn if different cpu is used, but allow a
774 specific cpu to override the generic cpu. */
775 new_partial = (new_flags & EF_IQ2000_CPU_MASK);
776 old_partial = (old_flags & EF_IQ2000_CPU_MASK);
777
778 if (new_partial != old_partial)
779 {
780 switch (new_partial)
781 {
782 case EF_IQ2000_CPU_IQ10:
783 strcat (new_opt, " -m10");
784 break;
785
786 default:
787 case EF_IQ2000_CPU_IQ2000:
788 strcat (new_opt, " -m2000");
789 break;
790 }
791
792 switch (old_partial)
793 {
794 case EF_IQ2000_CPU_IQ10:
795 strcat (old_opt, " -m10");
796 break;
797
798 default:
799 case EF_IQ2000_CPU_IQ2000:
800 strcat (old_opt, " -m2000");
801 break;
802 }
803 }
804
805 /* Print out any mismatches from above. */
806 if (new_opt[0])
807 {
808 error = TRUE;
809 _bfd_error_handler
810 (_("%s: compiled with %s and linked with modules compiled with %s"),
811 bfd_get_filename (ibfd), new_opt, old_opt);
812 }
813
814 new_flags &= ~ EF_IQ2000_ALL_FLAGS;
815 old_flags &= ~ EF_IQ2000_ALL_FLAGS;
816
817 /* Warn about any other mismatches. */
818 if (new_flags != old_flags)
819 {
820 error = TRUE;
821
822 _bfd_error_handler
823 (_("%s: uses different e_flags (0x%lx) fields than previous modules (0x%lx)"),
824 bfd_get_filename (ibfd), (long)new_flags, (long)old_flags);
825 }
826 }
827
828 if (error)
829 bfd_set_error (bfd_error_bad_value);
830
831 return !error;
832 }
833
834 \f
835 static bfd_boolean
836 iq2000_elf_print_private_bfd_data (bfd *abfd, void * ptr)
837 {
838 FILE *file = (FILE *) ptr;
839 flagword flags;
840
841 BFD_ASSERT (abfd != NULL && ptr != NULL);
842
843 /* Print normal ELF private data. */
844 _bfd_elf_print_private_bfd_data (abfd, ptr);
845
846 flags = elf_elfheader (abfd)->e_flags;
847 fprintf (file, _("private flags = 0x%lx:"), (long)flags);
848
849 switch (flags & EF_IQ2000_CPU_MASK)
850 {
851 case EF_IQ2000_CPU_IQ10:
852 fprintf (file, " -m10");
853 break;
854 case EF_IQ2000_CPU_IQ2000:
855 fprintf (file, " -m2000");
856 break;
857 default:
858 break;
859 }
860
861 fputc ('\n', file);
862 return TRUE;
863 }
864
865 static
866 bfd_boolean
867 iq2000_elf_object_p (bfd *abfd)
868 {
869 bfd_default_set_arch_mach (abfd, bfd_arch_iq2000,
870 elf32_iq2000_machine (abfd));
871 return TRUE;
872 }
873
874 \f
875 #define ELF_ARCH bfd_arch_iq2000
876 #define ELF_MACHINE_CODE EM_IQ2000
877 #define ELF_MAXPAGESIZE 0x1000
878
879 #define TARGET_BIG_SYM bfd_elf32_iq2000_vec
880 #define TARGET_BIG_NAME "elf32-iq2000"
881
882 #define elf_info_to_howto_rel NULL
883 #define elf_info_to_howto iq2000_info_to_howto_rela
884 #define elf_backend_relocate_section iq2000_elf_relocate_section
885 #define elf_backend_gc_mark_hook iq2000_elf_gc_mark_hook
886 #define elf_backend_check_relocs iq2000_elf_check_relocs
887 #define elf_backend_object_p iq2000_elf_object_p
888 #define elf_backend_rela_normal 1
889
890 #define elf_backend_can_gc_sections 1
891
892 #define bfd_elf32_bfd_reloc_type_lookup iq2000_reloc_type_lookup
893 #define bfd_elf32_bfd_reloc_name_lookup iq2000_reloc_name_lookup
894 #define bfd_elf32_bfd_set_private_flags iq2000_elf_set_private_flags
895 #define bfd_elf32_bfd_copy_private_bfd_data iq2000_elf_copy_private_bfd_data
896 #define bfd_elf32_bfd_merge_private_bfd_data iq2000_elf_merge_private_bfd_data
897 #define bfd_elf32_bfd_print_private_bfd_data iq2000_elf_print_private_bfd_data
898
899 #include "elf32-target.h"
GDB Binutils - Deliverables
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