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2004-11-24 Paul Brook <paul@codesourcery.com>
[binutils.git] / bfd / elf32-iq2000.c
blob5bc51aa746ab0f36978ddffbb11d48ab4059d3ac
1 /* IQ2000-specific support for 32-bit ELF.
2 Copyright (C) 2003, 2004 Free Software Foundation, Inc.
3
4 This file is part of BFD, the Binary File Descriptor library.
5
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2 of the License, or
9 (at your option) any later version.
10
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
15
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
18 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
19
20 #include "bfd.h"
21 #include "sysdep.h"
22 #include "libbfd.h"
23 #include "elf-bfd.h"
24 #include "elf/iq2000.h"
25
26 /* Forward declarations. */
27
28 static bfd_reloc_status_type iq2000_elf_howto_hi16_reloc (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
29
30 \f
31 static reloc_howto_type iq2000_elf_howto_table [] =
32 {
33 /* This reloc does nothing. */
34
35 HOWTO (R_IQ2000_NONE, /* type */
36 0, /* rightshift */
37 2, /* size (0 = byte, 1 = short, 2 = long) */
38 32, /* bitsize */
39 FALSE, /* pc_relative */
40 0, /* bitpos */
41 complain_overflow_bitfield, /* complain_on_overflow */
42 bfd_elf_generic_reloc, /* special_function */
43 "R_IQ2000_NONE", /* name */
44 FALSE, /* partial_inplace */
45 0, /* src_mask */
46 0, /* dst_mask */
47 FALSE), /* pcrel_offset */
48
49 /* A 16 bit absolute relocation. */
50 HOWTO (R_IQ2000_16, /* type */
51 0, /* rightshift */
52 1, /* size (0 = byte, 1 = short, 2 = long) */
53 16, /* bitsize */
54 FALSE, /* pc_relative */
55 0, /* bitpos */
56 complain_overflow_bitfield, /* complain_on_overflow */
57 bfd_elf_generic_reloc, /* special_function */
58 "R_IQ2000_16", /* name */
59 FALSE, /* partial_inplace */
60 0x0000, /* src_mask */
61 0xffff, /* dst_mask */
62 FALSE), /* pcrel_offset */
63
64 /* A 32 bit absolute relocation. */
65 HOWTO (R_IQ2000_32, /* type */
66 0, /* rightshift */
67 2, /* size (0 = byte, 1 = short, 2 = long) */
68 31, /* bitsize */
69 FALSE, /* pc_relative */
70 0, /* bitpos */
71 complain_overflow_bitfield, /* complain_on_overflow */
72 bfd_elf_generic_reloc, /* special_function */
73 "R_IQ2000_32", /* name */
74 FALSE, /* partial_inplace */
75 0x00000000, /* src_mask */
76 0x7fffffff, /* dst_mask */
77 FALSE), /* pcrel_offset */
78
79 /* 26 bit branch address. */
80 HOWTO (R_IQ2000_26, /* type */
81 2, /* rightshift */
82 2, /* size (0 = byte, 1 = short, 2 = long) */
83 26, /* bitsize */
84 FALSE, /* pc_relative */
85 0, /* bitpos */
86 complain_overflow_dont, /* complain_on_overflow */
87 /* This needs complex overflow
88 detection, because the upper four
89 bits must match the PC. */
90 bfd_elf_generic_reloc, /* special_function */
91 "R_IQ2000_26", /* name */
92 FALSE, /* partial_inplace */
93 0x00000000, /* src_mask */
94 0x03ffffff, /* dst_mask */
95 FALSE), /* pcrel_offset */
96
97 /* 16 bit PC relative reference. */
98 HOWTO (R_IQ2000_PC16, /* type */
99 2, /* rightshift */
100 2, /* size (0 = byte, 1 = short, 2 = long) */
101 16, /* bitsize */
102 TRUE, /* pc_relative */
103 0, /* bitpos */
104 complain_overflow_signed, /* complain_on_overflow */
105 bfd_elf_generic_reloc, /* special_function */
106 "R_IQ2000_PC16", /* name */
107 FALSE, /* partial_inplace */
108 0x0000, /* src_mask */
109 0xffff, /* dst_mask */
110 TRUE), /* pcrel_offset */
111
112 /* high 16 bits of symbol value. */
113 HOWTO (R_IQ2000_HI16, /* type */
114 16, /* rightshift */
115 2, /* size (0 = byte, 1 = short, 2 = long) */
116 15, /* bitsize */
117 FALSE, /* pc_relative */
118 0, /* bitpos */
119 complain_overflow_dont, /* complain_on_overflow */
120 iq2000_elf_howto_hi16_reloc, /* special_function */
121 "R_IQ2000_HI16", /* name */
122 FALSE, /* partial_inplace */
123 0x0000, /* src_mask */
124 0x7fff, /* dst_mask */
125 FALSE), /* pcrel_offset */
126
127 /* Low 16 bits of symbol value. */
128 HOWTO (R_IQ2000_LO16, /* type */
129 0, /* rightshift */
130 2, /* size (0 = byte, 1 = short, 2 = long) */
131 16, /* bitsize */
132 FALSE, /* pc_relative */
133 0, /* bitpos */
134 complain_overflow_dont, /* complain_on_overflow */
135 bfd_elf_generic_reloc, /* special_function */
136 "R_IQ2000_LO16", /* name */
137 FALSE, /* partial_inplace */
138 0x0000, /* src_mask */
139 0xffff, /* dst_mask */
140 FALSE), /* pcrel_offset */
141
142 /* 16-bit jump offset. */
143 HOWTO (R_IQ2000_OFFSET_16, /* type */
144 2, /* rightshift */
145 2, /* size (0 = byte, 1 = short, 2 = long) */
146 16, /* bitsize */
147 FALSE, /* pc_relative */
148 0, /* bitpos */
149 complain_overflow_dont, /* complain_on_overflow */
150 bfd_elf_generic_reloc, /* special_function */
151 "R_IQ2000_OFFSET_16", /* name */
152 FALSE, /* partial_inplace */
153 0x0000, /* src_mask */
154 0xffff, /* dst_mask */
155 FALSE), /* pcrel_offset */
156
157 /* 21-bit jump offset. */
158 HOWTO (R_IQ2000_OFFSET_21, /* type */
159 2, /* rightshift */
160 2, /* size (0 = byte, 1 = short, 2 = long) */
161 21, /* bitsize */
162 FALSE, /* pc_relative */
163 0, /* bitpos */
164 complain_overflow_dont, /* complain_on_overflow */
165 bfd_elf_generic_reloc, /* special_function */
166 "R_IQ2000_OFFSET_21", /* name */
167 FALSE, /* partial_inplace */
168 0x000000, /* src_mask */
169 0x1fffff, /* dst_mask */
170 FALSE), /* pcrel_offset */
171
172 /* unsigned high 16 bits of value. */
173 HOWTO (R_IQ2000_OFFSET_21, /* type */
174 16, /* rightshift */
175 2, /* size (0 = byte, 1 = short, 2 = long) */
176 16, /* bitsize */
177 FALSE, /* pc_relative */
178 0, /* bitpos */
179 complain_overflow_dont, /* complain_on_overflow */
180 bfd_elf_generic_reloc, /* special_function */
181 "R_IQ2000_UHI16", /* name */
182 FALSE, /* partial_inplace */
183 0x0000, /* src_mask */
184 0x7fff, /* dst_mask */
185 FALSE), /* pcrel_offset */
186
187 /* A 32 bit absolute debug relocation. */
188 HOWTO (R_IQ2000_32_DEBUG, /* type */
189 0, /* rightshift */
190 2, /* size (0 = byte, 1 = short, 2 = long) */
191 32, /* bitsize */
192 FALSE, /* pc_relative */
193 0, /* bitpos */
194 complain_overflow_bitfield, /* complain_on_overflow */
195 bfd_elf_generic_reloc, /* special_function */
196 "R_IQ2000_32", /* name */
197 FALSE, /* partial_inplace */
198 0x00000000, /* src_mask */
199 0xffffffff, /* dst_mask */
200 FALSE), /* pcrel_offset */
201
202 };
203
204 /* GNU extension to record C++ vtable hierarchy. */
205 static reloc_howto_type iq2000_elf_vtinherit_howto =
206 HOWTO (R_IQ2000_GNU_VTINHERIT, /* type */
207 0, /* rightshift */
208 2, /* size (0 = byte, 1 = short, 2 = long) */
209 0, /* bitsize */
210 FALSE, /* pc_relative */
211 0, /* bitpos */
212 complain_overflow_dont, /* complain_on_overflow */
213 NULL, /* special_function */
214 "R_IQ2000_GNU_VTINHERIT", /* name */
215 FALSE, /* partial_inplace */
216 0, /* src_mask */
217 0, /* dst_mask */
218 FALSE); /* pcrel_offset */
219
220 /* GNU extension to record C++ vtable member usage. */
221 static reloc_howto_type iq2000_elf_vtentry_howto =
222 HOWTO (R_IQ2000_GNU_VTENTRY, /* type */
223 0, /* rightshift */
224 2, /* size (0 = byte, 1 = short, 2 = long) */
225 0, /* bitsize */
226 FALSE, /* pc_relative */
227 0, /* bitpos */
228 complain_overflow_dont, /* complain_on_overflow */
229 NULL, /* special_function */
230 "R_IQ2000_GNU_VTENTRY", /* name */
231 FALSE, /* partial_inplace */
232 0, /* src_mask */
233 0, /* dst_mask */
234 FALSE); /* pcrel_offset */
235
236 \f
237 /* Map BFD reloc types to IQ2000 ELF reloc types. */
238
239 struct iq2000_reloc_map
240 {
241 bfd_reloc_code_real_type bfd_reloc_val;
242 unsigned int iq2000_reloc_val;
243 };
244
245 static const struct iq2000_reloc_map iq2000_reloc_map [] =
246 {
247 { BFD_RELOC_NONE, R_IQ2000_NONE },
248 { BFD_RELOC_16, R_IQ2000_16 },
249 { BFD_RELOC_32, R_IQ2000_32 },
250 { BFD_RELOC_MIPS_JMP, R_IQ2000_26 },
251 { BFD_RELOC_16_PCREL_S2, R_IQ2000_PC16 },
252 { BFD_RELOC_HI16, R_IQ2000_HI16 },
253 { BFD_RELOC_LO16, R_IQ2000_LO16 },
254 { BFD_RELOC_IQ2000_OFFSET_16,R_IQ2000_OFFSET_16 },
255 { BFD_RELOC_IQ2000_OFFSET_21,R_IQ2000_OFFSET_21 },
256 { BFD_RELOC_IQ2000_UHI16, R_IQ2000_UHI16 },
257 { BFD_RELOC_VTABLE_INHERIT, R_IQ2000_GNU_VTINHERIT },
258 { BFD_RELOC_VTABLE_ENTRY, R_IQ2000_GNU_VTENTRY },
259 };
260
261 static bfd_reloc_status_type
262 iq2000_elf_howto_hi16_reloc (bfd *abfd ATTRIBUTE_UNUSED,
263 arelent *reloc_entry,
264 asymbol *symbol,
265 void * data,
266 asection *input_section,
267 bfd *output_bfd,
268 char **error_message ATTRIBUTE_UNUSED)
269 {
270 bfd_reloc_status_type ret;
271 bfd_vma relocation;
272
273 /* If we're relocating and this an external symbol,
274 we don't want to change anything. */
275 if (output_bfd != (bfd *) NULL
276 && (symbol->flags & BSF_SECTION_SYM) == 0
277 && reloc_entry->addend == 0)
278 {
279 reloc_entry->address += input_section->output_offset;
280 return bfd_reloc_ok;
281 }
282
283 if (bfd_is_com_section (symbol->section))
284 relocation = 0;
285 else
286 relocation = symbol->value;
287
288 relocation += symbol->section->output_section->vma;
289 relocation += symbol->section->output_offset;
290 relocation += reloc_entry->addend;
291
292 /* If %lo will have sign-extension, compensate by add 0x10000 to hi portion. */
293 if (relocation & 0x8000)
294 reloc_entry->addend += 0x10000;
295
296 /* Now do the reloc in the usual way. */
297 ret = bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
298 input_section, output_bfd, error_message);
299
300 /* Put it back the way it was. */
301 if (relocation & 0x8000)
302 reloc_entry->addend -= 0x10000;
303
304 return ret;
305 }
306
307 static bfd_reloc_status_type
308 iq2000_elf_relocate_hi16 (bfd *input_bfd,
309 Elf_Internal_Rela *relhi,
310 bfd_byte *contents,
311 bfd_vma value)
312 {
313 bfd_vma insn;
314
315 insn = bfd_get_32 (input_bfd, contents + relhi->r_offset);
316
317 value += relhi->r_addend;
318 value &= 0x7fffffff; /* Mask off top-bit which is Harvard mask bit. */
319
320 /* If top-bit of %lo value is on, this means that %lo will
321 sign-propagate and so we compensate by adding 1 to %hi value. */
322 if (value & 0x8000)
323 value += 0x10000;
324
325 value >>= 16;
326 insn = ((insn & ~0xFFFF) | value);
327
328 bfd_put_32 (input_bfd, insn, contents + relhi->r_offset);
329 return bfd_reloc_ok;
330 }
331
332 static reloc_howto_type *
333 iq2000_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
334 bfd_reloc_code_real_type code)
335 {
336 /* Note that the iq2000_elf_howto_table is indxed by the R_
337 constants. Thus, the order that the howto records appear in the
338 table *must* match the order of the relocation types defined in
339 include/elf/iq2000.h. */
340
341 switch (code)
342 {
343 case BFD_RELOC_NONE:
344 return &iq2000_elf_howto_table[ (int) R_IQ2000_NONE];
345 case BFD_RELOC_16:
346 return &iq2000_elf_howto_table[ (int) R_IQ2000_16];
347 case BFD_RELOC_32:
348 return &iq2000_elf_howto_table[ (int) R_IQ2000_32];
349 case BFD_RELOC_MIPS_JMP:
350 return &iq2000_elf_howto_table[ (int) R_IQ2000_26];
351 case BFD_RELOC_IQ2000_OFFSET_16:
352 return &iq2000_elf_howto_table[ (int) R_IQ2000_OFFSET_16];
353 case BFD_RELOC_IQ2000_OFFSET_21:
354 return &iq2000_elf_howto_table[ (int) R_IQ2000_OFFSET_21];
355 case BFD_RELOC_16_PCREL_S2:
356 return &iq2000_elf_howto_table[ (int) R_IQ2000_PC16];
357 case BFD_RELOC_HI16:
358 return &iq2000_elf_howto_table[ (int) R_IQ2000_HI16];
359 case BFD_RELOC_IQ2000_UHI16:
360 return &iq2000_elf_howto_table[ (int) R_IQ2000_UHI16];
361 case BFD_RELOC_LO16:
362 return &iq2000_elf_howto_table[ (int) R_IQ2000_LO16];
363 case BFD_RELOC_VTABLE_INHERIT:
364 return &iq2000_elf_vtinherit_howto;
365 case BFD_RELOC_VTABLE_ENTRY:
366 return &iq2000_elf_vtentry_howto;
367 default:
368 /* Pacify gcc -Wall. */
369 return NULL;
370 }
371 return NULL;
372 }
373
374 \f
375 /* Perform a single relocation. By default we use the standard BFD
376 routines. */
377
378 static bfd_reloc_status_type
379 iq2000_final_link_relocate (reloc_howto_type * howto,
380 bfd * input_bfd,
381 asection * input_section,
382 bfd_byte * contents,
383 Elf_Internal_Rela * rel,
384 bfd_vma relocation)
385 {
386 return _bfd_final_link_relocate (howto, input_bfd, input_section,
387 contents, rel->r_offset,
388 relocation, rel->r_addend);
389 }
390 \f
391 /* Set the howto pointer for a IQ2000 ELF reloc. */
392
393 static void
394 iq2000_info_to_howto_rela (bfd * abfd ATTRIBUTE_UNUSED,
395 arelent * cache_ptr,
396 Elf_Internal_Rela * dst)
397 {
398 unsigned int r_type;
399
400 r_type = ELF32_R_TYPE (dst->r_info);
401 switch (r_type)
402 {
403 case R_IQ2000_GNU_VTINHERIT:
404 cache_ptr->howto = & iq2000_elf_vtinherit_howto;
405 break;
406
407 case R_IQ2000_GNU_VTENTRY:
408 cache_ptr->howto = & iq2000_elf_vtentry_howto;
409 break;
410
411 default:
412 cache_ptr->howto = & iq2000_elf_howto_table [r_type];
413 break;
414 }
415 }
416
417 /* Look through the relocs for a section during the first phase.
418 Since we don't do .gots or .plts, we just need to consider the
419 virtual table relocs for gc. */
420
421 static bfd_boolean
422 iq2000_elf_check_relocs (bfd *abfd,
423 struct bfd_link_info *info,
424 asection *sec,
425 const Elf_Internal_Rela *relocs)
426 {
427 Elf_Internal_Shdr *symtab_hdr;
428 struct elf_link_hash_entry **sym_hashes, **sym_hashes_end;
429 const Elf_Internal_Rela *rel;
430 const Elf_Internal_Rela *rel_end;
431 bfd_boolean changed = FALSE;
432
433 if (info->relocatable)
434 return TRUE;
435
436 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
437 sym_hashes = elf_sym_hashes (abfd);
438 sym_hashes_end = sym_hashes + symtab_hdr->sh_size / sizeof (Elf32_External_Sym);
439 if (!elf_bad_symtab (abfd))
440 sym_hashes_end -= symtab_hdr->sh_info;
441
442 rel_end = relocs + sec->reloc_count;
443 for (rel = relocs; rel < rel_end; rel++)
444 {
445 struct elf_link_hash_entry *h;
446 unsigned long r_symndx;
447
448 r_symndx = ELF32_R_SYM (rel->r_info);
449 if (r_symndx < symtab_hdr->sh_info)
450 h = NULL;
451 else
452 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
453
454 switch (ELF32_R_TYPE (rel->r_info))
455 {
456 /* This relocation describes the C++ object vtable
457 hierarchy. Reconstruct it for later use during GC. */
458 case R_IQ2000_GNU_VTINHERIT:
459 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
460 return FALSE;
461 break;
462
463 /* This relocation describes which C++ vtable entries
464 are actually used. Record for later use during GC. */
465 case R_IQ2000_GNU_VTENTRY:
466 if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
467 return FALSE;
468 break;
469
470 case R_IQ2000_32:
471 /* For debug section, change to special harvard-aware relocations. */
472 if (memcmp (sec->name, ".debug", 6) == 0
473 || memcmp (sec->name, ".stab", 5) == 0
474 || memcmp (sec->name, ".eh_frame", 9) == 0)
475 {
476 ((Elf_Internal_Rela *) rel)->r_info
477 = ELF32_R_INFO (ELF32_R_SYM (rel->r_info), R_IQ2000_32_DEBUG);
478 changed = TRUE;
479 }
480 break;
481 }
482 }
483
484 if (changed)
485 /* Note that we've changed relocs, otherwise if !info->keep_memory
486 we'll free the relocs and lose our changes. */
487 elf_section_data (sec)->relocs = (Elf_Internal_Rela *) relocs;
488
489 return TRUE;
490 }
491
492 \f
493 /* Relocate a IQ2000 ELF section.
494 There is some attempt to make this function usable for many architectures,
495 both USE_REL and USE_RELA ['twould be nice if such a critter existed],
496 if only to serve as a learning tool.
497
498 The RELOCATE_SECTION function is called by the new ELF backend linker
499 to handle the relocations for a section.
500
501 The relocs are always passed as Rela structures; if the section
502 actually uses Rel structures, the r_addend field will always be
503 zero.
504
505 This function is responsible for adjusting the section contents as
506 necessary, and (if using Rela relocs and generating a relocatable
507 output file) adjusting the reloc addend as necessary.
508
509 This function does not have to worry about setting the reloc
510 address or the reloc symbol index.
511
512 LOCAL_SYMS is a pointer to the swapped in local symbols.
513
514 LOCAL_SECTIONS is an array giving the section in the input file
515 corresponding to the st_shndx field of each local symbol.
516
517 The global hash table entry for the global symbols can be found
518 via elf_sym_hashes (input_bfd).
519
520 When generating relocatable output, this function must handle
521 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
522 going to be the section symbol corresponding to the output
523 section, which means that the addend must be adjusted
524 accordingly. */
525
526 static bfd_boolean
527 iq2000_elf_relocate_section (bfd * output_bfd ATTRIBUTE_UNUSED,
528 struct bfd_link_info * info,
529 bfd * input_bfd,
530 asection * input_section,
531 bfd_byte * contents,
532 Elf_Internal_Rela * relocs,
533 Elf_Internal_Sym * local_syms,
534 asection ** local_sections)
535 {
536 Elf_Internal_Shdr * symtab_hdr;
537 struct elf_link_hash_entry ** sym_hashes;
538 Elf_Internal_Rela * rel;
539 Elf_Internal_Rela * relend;
540
541 if (info->relocatable)
542 return TRUE;
543
544 symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr;
545 sym_hashes = elf_sym_hashes (input_bfd);
546 relend = relocs + input_section->reloc_count;
547
548 for (rel = relocs; rel < relend; rel ++)
549 {
550 reloc_howto_type * howto;
551 unsigned long r_symndx;
552 Elf_Internal_Sym * sym;
553 asection * sec;
554 struct elf_link_hash_entry * h;
555 bfd_vma relocation;
556 bfd_reloc_status_type r;
557 const char * name = NULL;
558 int r_type;
559
560 r_type = ELF32_R_TYPE (rel->r_info);
561
562 if ( r_type == R_IQ2000_GNU_VTINHERIT
563 || r_type == R_IQ2000_GNU_VTENTRY)
564 continue;
565
566 r_symndx = ELF32_R_SYM (rel->r_info);
567
568 /* This is a final link. */
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 switch (r_type)
600 {
601 case R_IQ2000_HI16:
602 r = iq2000_elf_relocate_hi16 (input_bfd, rel, contents, relocation);
603 break;
604
605 case R_IQ2000_PC16:
606 rel->r_addend -= 4;
607 /* Fall through. */
608
609 default:
610 r = iq2000_final_link_relocate (howto, input_bfd, input_section,
611 contents, rel, relocation);
612 break;
613 }
614
615 if (r != bfd_reloc_ok)
616 {
617 const char * msg = (const char *) NULL;
618
619 switch (r)
620 {
621 case bfd_reloc_overflow:
622 r = info->callbacks->reloc_overflow
623 (info, (h ? &h->root : NULL), name, howto->name,
624 (bfd_vma) 0, input_bfd, input_section, rel->r_offset);
625 break;
626
627 case bfd_reloc_undefined:
628 r = info->callbacks->undefined_symbol
629 (info, name, input_bfd, input_section, rel->r_offset, TRUE);
630 break;
631
632 case bfd_reloc_outofrange:
633 msg = _("internal error: out of range error");
634 break;
635
636 case bfd_reloc_notsupported:
637 msg = _("internal error: unsupported relocation error");
638 break;
639
640 case bfd_reloc_dangerous:
641 msg = _("internal error: dangerous relocation");
642 break;
643
644 default:
645 msg = _("internal error: unknown error");
646 break;
647 }
648
649 if (msg)
650 r = info->callbacks->warning
651 (info, msg, name, input_bfd, input_section, rel->r_offset);
652
653 if (! r)
654 return FALSE;
655 }
656 }
657
658 return TRUE;
659 }
660 \f
661
662 /* Update the got entry reference counts for the section being
663 removed. */
664
665 static bfd_boolean
666 iq2000_elf_gc_sweep_hook (bfd * abfd ATTRIBUTE_UNUSED,
667 struct bfd_link_info * info ATTRIBUTE_UNUSED,
668 asection * sec ATTRIBUTE_UNUSED,
669 const Elf_Internal_Rela * relocs ATTRIBUTE_UNUSED)
670 {
671 return TRUE;
672 }
673
674 /* Return the section that should be marked against GC for a given
675 relocation. */
676
677 static asection *
678 iq2000_elf_gc_mark_hook (asection * sec,
679 struct bfd_link_info * info ATTRIBUTE_UNUSED,
680 Elf_Internal_Rela * rel,
681 struct elf_link_hash_entry * h,
682 Elf_Internal_Sym * sym)
683 {
684 if (h == NULL)
685 return bfd_section_from_elf_index (sec->owner, sym->st_shndx);
686
687 switch (ELF32_R_TYPE (rel->r_info))
688 {
689 case R_IQ2000_GNU_VTINHERIT:
690 case R_IQ2000_GNU_VTENTRY:
691 break;
692
693 default:
694 switch (h->root.type)
695 {
696 case bfd_link_hash_defined:
697 case bfd_link_hash_defweak:
698 return h->root.u.def.section;
699
700 case bfd_link_hash_common:
701 return h->root.u.c.p->section;
702
703 default:
704 break;
705 }
706 }
707
708 return NULL;
709 }
710
711 \f
712 /* Return the MACH for an e_flags value. */
713
714 static int
715 elf32_iq2000_machine (bfd *abfd)
716 {
717 switch (elf_elfheader (abfd)->e_flags & EF_IQ2000_CPU_MASK)
718 {
719 case EF_IQ2000_CPU_IQ10:
720 return bfd_mach_iq10;
721
722 case EF_IQ2000_CPU_IQ2000:
723 default:
724 return bfd_mach_iq2000;
725 }
726 }
727
728 \f
729 /* Function to set the ELF flag bits. */
730
731 static bfd_boolean
732 iq2000_elf_set_private_flags (bfd *abfd, flagword flags)
733 {
734 elf_elfheader (abfd)->e_flags = flags;
735 elf_flags_init (abfd) = TRUE;
736 return TRUE;
737 }
738
739 /* Copy backend specific data from one object module to another. */
740
741 static bfd_boolean
742 iq2000_elf_copy_private_bfd_data (bfd *ibfd, bfd *obfd)
743 {
744 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
745 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
746 return TRUE;
747
748 BFD_ASSERT (!elf_flags_init (obfd)
749 || elf_elfheader (obfd)->e_flags == elf_elfheader (ibfd)->e_flags);
750
751 elf_elfheader (obfd)->e_flags = elf_elfheader (ibfd)->e_flags;
752 elf_flags_init (obfd) = TRUE;
753 return TRUE;
754 }
755
756 /* Merge backend specific data from an object
757 file to the output object file when linking. */
758
759 static bfd_boolean
760 iq2000_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
761 {
762 flagword old_flags, old_partial;
763 flagword new_flags, new_partial;
764 bfd_boolean error = FALSE;
765 char new_opt[80];
766 char old_opt[80];
767
768 new_opt[0] = old_opt[0] = '\0';
769 new_flags = elf_elfheader (ibfd)->e_flags;
770 old_flags = elf_elfheader (obfd)->e_flags;
771
772 if (!elf_flags_init (obfd))
773 {
774 /* First call, no flags set. */
775 elf_flags_init (obfd) = TRUE;
776 elf_elfheader (obfd)->e_flags = new_flags;
777 }
778
779 else if (new_flags != old_flags)
780 {
781 /* Warn if different cpu is used, but allow a
782 specific cpu to override the generic cpu. */
783 new_partial = (new_flags & EF_IQ2000_CPU_MASK);
784 old_partial = (old_flags & EF_IQ2000_CPU_MASK);
785
786 if (new_partial != old_partial)
787 {
788 switch (new_partial)
789 {
790 case EF_IQ2000_CPU_IQ10:
791 strcat (new_opt, " -m10");
792 break;
793
794 default:
795 case EF_IQ2000_CPU_IQ2000:
796 strcat (new_opt, " -m2000");
797 break;
798 }
799
800 switch (old_partial)
801 {
802 case EF_IQ2000_CPU_IQ10:
803 strcat (old_opt, " -m10");
804 break;
805
806 default:
807 case EF_IQ2000_CPU_IQ2000:
808 strcat (old_opt, " -m2000");
809 break;
810 }
811 }
812
813 /* Print out any mismatches from above. */
814 if (new_opt[0])
815 {
816 error = TRUE;
817 _bfd_error_handler
818 (_("%s: compiled with %s and linked with modules compiled with %s"),
819 bfd_get_filename (ibfd), new_opt, old_opt);
820 }
821
822 new_flags &= ~ EF_IQ2000_ALL_FLAGS;
823 old_flags &= ~ EF_IQ2000_ALL_FLAGS;
824
825 /* Warn about any other mismatches. */
826 if (new_flags != old_flags)
827 {
828 error = TRUE;
829
830 _bfd_error_handler
831 (_("%s: uses different e_flags (0x%lx) fields than previous modules (0x%lx)"),
832 bfd_get_filename (ibfd), (long)new_flags, (long)old_flags);
833 }
834 }
835
836 if (error)
837 bfd_set_error (bfd_error_bad_value);
838
839 return !error;
840 }
841
842 \f
843 static bfd_boolean
844 iq2000_elf_print_private_bfd_data (bfd *abfd, void * ptr)
845 {
846 FILE *file = (FILE *) ptr;
847 flagword flags;
848
849 BFD_ASSERT (abfd != NULL && ptr != NULL);
850
851 /* Print normal ELF private data. */
852 _bfd_elf_print_private_bfd_data (abfd, ptr);
853
854 flags = elf_elfheader (abfd)->e_flags;
855 fprintf (file, _("private flags = 0x%lx:"), (long)flags);
856
857 switch (flags & EF_IQ2000_CPU_MASK)
858 {
859 case EF_IQ2000_CPU_IQ10:
860 fprintf (file, " -m10");
861 break;
862 case EF_IQ2000_CPU_IQ2000:
863 fprintf (file, " -m2000");
864 break;
865 default:
866 break;
867 }
868
869 fputc ('\n', file);
870 return TRUE;
871 }
872
873 static
874 bfd_boolean
875 iq2000_elf_object_p (bfd *abfd)
876 {
877 bfd_default_set_arch_mach (abfd, bfd_arch_iq2000,
878 elf32_iq2000_machine (abfd));
879 return TRUE;
880 }
881
882 \f
883 #define ELF_ARCH bfd_arch_iq2000
884 #define ELF_MACHINE_CODE EM_IQ2000
885 #define ELF_MAXPAGESIZE 0x1000
886
887 #define TARGET_BIG_SYM bfd_elf32_iq2000_vec
888 #define TARGET_BIG_NAME "elf32-iq2000"
889
890 #define elf_info_to_howto_rel NULL
891 #define elf_info_to_howto iq2000_info_to_howto_rela
892 #define elf_backend_relocate_section iq2000_elf_relocate_section
893 #define elf_backend_gc_mark_hook iq2000_elf_gc_mark_hook
894 #define elf_backend_gc_sweep_hook iq2000_elf_gc_sweep_hook
895 #define elf_backend_check_relocs iq2000_elf_check_relocs
896 #define elf_backend_object_p iq2000_elf_object_p
897 #define elf_backend_rela_normal 1
898
899 #define elf_backend_can_gc_sections 1
900
901 #define bfd_elf32_bfd_reloc_type_lookup iq2000_reloc_type_lookup
902 #define bfd_elf32_bfd_set_private_flags iq2000_elf_set_private_flags
903 #define bfd_elf32_bfd_copy_private_bfd_data iq2000_elf_copy_private_bfd_data
904 #define bfd_elf32_bfd_merge_private_bfd_data iq2000_elf_merge_private_bfd_data
905 #define bfd_elf32_bfd_print_private_bfd_data iq2000_elf_print_private_bfd_data
906
907 #include "elf32-target.h"
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