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* aout-adobe.c (aout_32_bfd_reloc_name_lookup): Define.
[deliverable/binutils-gdb.git] / bfd / elf32-iq2000.c
CommitLineData
a75473eb 1/* IQ2000-specific support for 32-bit ELF.
ab96bf03
AM		 2 Copyright (C) 2003, 2004, 2005, 2006, 2007
3 Free Software Foundation, Inc.
a75473eb 4
58852c27 5 This file is part of BFD, the Binary File Descriptor library.
a75473eb 6
58852c27
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
9 the Free Software Foundation; either version 2 of the License, or
10 (at your option) any later version.
a75473eb 11
58852c27
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.
a75473eb 16
58852c27
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
3e110533 19 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */
a75473eb
SC		 20
21#include "bfd.h"
22#include "sysdep.h"
23#include "libbfd.h"
24#include "elf-bfd.h"
25#include "elf/iq2000.h"
26
27/* Forward declarations. */
28
58852c27 29static bfd_reloc_status_type iq2000_elf_howto_hi16_reloc (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
a75473eb
SC		 30
31\f
32static 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. */
206static 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. */
222static 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
a75473eb 238static bfd_reloc_status_type
58852c27
NC		 239iq2000_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)
a75473eb
SC		 246{
247 bfd_reloc_status_type ret;
248 bfd_vma relocation;
249
58852c27
NC		 250 /* If we're relocating and this an external symbol,
251 we don't want to change anything. */
a75473eb
SC		 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
58852c27 269 /* If %lo will have sign-extension, compensate by add 0x10000 to hi portion. */
a75473eb
SC		 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
58852c27 277 /* Put it back the way it was. */
a75473eb
SC		 278 if (relocation & 0x8000)
279 reloc_entry->addend -= 0x10000;
280
281 return ret;
282}
283
284static bfd_reloc_status_type
58852c27
NC		 285iq2000_elf_relocate_hi16 (bfd *input_bfd,
286 Elf_Internal_Rela *relhi,
287 bfd_byte *contents,
288 bfd_vma value)
a75473eb
SC		 289{
290 bfd_vma insn;
291
292 insn = bfd_get_32 (input_bfd, contents + relhi->r_offset);
293
294 value += relhi->r_addend;
58852c27 295 value &= 0x7fffffff; /* Mask off top-bit which is Harvard mask bit. */
a75473eb 296
58852c27
NC		 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. */
a75473eb
SC		 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
6c408f53
NC		 309/* Map BFD reloc types to IQ2000 ELF reloc types. */
310
a75473eb 311static reloc_howto_type *
de52dba4
AM		 312iq2000_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
313 bfd_reloc_code_real_type code)
a75473eb
SC		 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
157090f7
AM		 353static reloc_howto_type *
354iq2000_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}
a75473eb
SC		 373\f
374/* Perform a single relocation. By default we use the standard BFD
375 routines. */
376
377static bfd_reloc_status_type
58852c27
NC		 378iq2000_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)
a75473eb
SC		 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
392static void
58852c27
NC		 393iq2000_info_to_howto_rela (bfd * abfd ATTRIBUTE_UNUSED,
394 arelent * cache_ptr,
395 Elf_Internal_Rela * dst)
a75473eb
SC		 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
420static bfd_boolean
58852c27
NC		 421iq2000_elf_check_relocs (bfd *abfd,
422 struct bfd_link_info *info,
423 asection *sec,
424 const Elf_Internal_Rela *relocs)
a75473eb
SC		 425{
426 Elf_Internal_Shdr *symtab_hdr;
427 struct elf_link_hash_entry **sym_hashes, **sym_hashes_end;
60d8b524
AM		 428 const Elf_Internal_Rela *rel;
429 const Elf_Internal_Rela *rel_end;
430 bfd_boolean changed = FALSE;
a75473eb 431
1049f94e 432 if (info->relocatable)
a75473eb
SC		 433 return TRUE;
434
435 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
436 sym_hashes = elf_sym_hashes (abfd);
58852c27 437 sym_hashes_end = sym_hashes + symtab_hdr->sh_size / sizeof (Elf32_External_Sym);
a75473eb
SC		 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
973a3492
L		 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 }
a75473eb
SC		 457
458 switch (ELF32_R_TYPE (rel->r_info))
459 {
58852c27
NC		 460 /* This relocation describes the C++ object vtable
461 hierarchy. Reconstruct it for later use during GC. */
a75473eb 462 case R_IQ2000_GNU_VTINHERIT:
c152c796 463 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
a75473eb
SC		 464 return FALSE;
465 break;
466
58852c27
NC		 467 /* This relocation describes which C++ vtable entries
468 are actually used. Record for later use during GC. */
a75473eb 469 case R_IQ2000_GNU_VTENTRY:
c152c796 470 if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
a75473eb
SC		 471 return FALSE;
472 break;
473
474 case R_IQ2000_32:
58852c27 475 /* For debug section, change to special harvard-aware relocations. */
0112cd26
NC		 476 if (CONST_STRNEQ (sec->name, ".debug")
477 || CONST_STRNEQ (sec->name, ".stab")
478 || CONST_STRNEQ (sec->name, ".eh_frame"))
60d8b524
AM		 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 }
a75473eb
SC		 484 break;
485 }
486 }
60d8b524
AM		 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. */
d5cb4bb8 491 elf_section_data (sec)->relocs = (Elf_Internal_Rela *) relocs;
60d8b524 492
a75473eb
SC		 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
1049f94e 510 necessary, and (if using Rela relocs and generating a relocatable
a75473eb
SC		 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
1049f94e 524 When generating relocatable output, this function must handle
a75473eb
SC		 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
530static bfd_boolean
58852c27
NC		 531iq2000_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)
a75473eb
SC		 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
a75473eb
SC		 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;
a75473eb
SC		 585 }
586 else
587 {
560e09e9
NC		 588 bfd_boolean unresolved_reloc;
589 bfd_boolean warned;
590
b2a8e766
AM		 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);
a75473eb
SC		 595
596 name = h->root.root.string;
a75473eb
SC		 597 }
598
ab96bf03
AM		 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
a75473eb
SC		 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
dfeffb9f
L		 637 (info, (h ? &h->root : NULL), name, howto->name,
638 (bfd_vma) 0, input_bfd, input_section, rel->r_offset);
a75473eb
SC		 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
a75473eb
SC		 676/* Return the section that should be marked against GC for a given
677 relocation. */
678
679static asection *
07adf181
AM		 680iq2000_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)
a75473eb 685{
07adf181
AM		 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);
a75473eb
SC		 695}
696
697\f
698/* Return the MACH for an e_flags value. */
699
700static int
58852c27 701elf32_iq2000_machine (bfd *abfd)
a75473eb
SC		 702{
703 switch (elf_elfheader (abfd)->e_flags & EF_IQ2000_CPU_MASK)
704 {
58852c27
NC		 705 case EF_IQ2000_CPU_IQ10:
706 return bfd_mach_iq10;
a75473eb 707
58852c27
NC		 708 case EF_IQ2000_CPU_IQ2000:
709 default:
710 return bfd_mach_iq2000;
711 }
a75473eb
SC		 712}
713
714\f
715/* Function to set the ELF flag bits. */
716
717static bfd_boolean
58852c27 718iq2000_elf_set_private_flags (bfd *abfd, flagword flags)
a75473eb
SC		 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
727static bfd_boolean
58852c27 728iq2000_elf_copy_private_bfd_data (bfd *ibfd, bfd *obfd)
a75473eb
SC		 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 return TRUE;
740}
741
58852c27
NC		 742/* Merge backend specific data from an object
743 file to the output object file when linking. */
a75473eb
SC		 744
745static bfd_boolean
58852c27 746iq2000_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
a75473eb
SC		 747{
748 flagword old_flags, old_partial;
749 flagword new_flags, new_partial;
750 bfd_boolean error = FALSE;
751 char new_opt[80];
752 char old_opt[80];
753
754 new_opt[0] = old_opt[0] = '\0';
755 new_flags = elf_elfheader (ibfd)->e_flags;
756 old_flags = elf_elfheader (obfd)->e_flags;
757
a75473eb
SC		 758 if (!elf_flags_init (obfd))
759 {
760 /* First call, no flags set. */
761 elf_flags_init (obfd) = TRUE;
762 elf_elfheader (obfd)->e_flags = new_flags;
763 }
764
58852c27 765 else if (new_flags != old_flags)
a75473eb 766 {
58852c27
NC		 767 /* Warn if different cpu is used, but allow a
768 specific cpu to override the generic cpu. */
a75473eb
SC		 769 new_partial = (new_flags & EF_IQ2000_CPU_MASK);
770 old_partial = (old_flags & EF_IQ2000_CPU_MASK);
a75473eb 771
58852c27 772 if (new_partial != old_partial)
a75473eb
SC		 773 {
774 switch (new_partial)
775 {
58852c27
NC		 776 case EF_IQ2000_CPU_IQ10:
777 strcat (new_opt, " -m10");
778 break;
779
780 default:
781 case EF_IQ2000_CPU_IQ2000:
782 strcat (new_opt, " -m2000");
783 break;
a75473eb
SC		 784 }
785
786 switch (old_partial)
787 {
58852c27
NC		 788 case EF_IQ2000_CPU_IQ10:
789 strcat (old_opt, " -m10");
790 break;
791
792 default:
793 case EF_IQ2000_CPU_IQ2000:
794 strcat (old_opt, " -m2000");
795 break;
a75473eb
SC		 796 }
797 }
798
799 /* Print out any mismatches from above. */
800 if (new_opt[0])
801 {
802 error = TRUE;
58852c27 803 _bfd_error_handler
a75473eb
SC		 804 (_("%s: compiled with %s and linked with modules compiled with %s"),
805 bfd_get_filename (ibfd), new_opt, old_opt);
806 }
807
808 new_flags &= ~ EF_IQ2000_ALL_FLAGS;
809 old_flags &= ~ EF_IQ2000_ALL_FLAGS;
810
811 /* Warn about any other mismatches. */
812 if (new_flags != old_flags)
813 {
814 error = TRUE;
58852c27
NC		 815
816 _bfd_error_handler
a75473eb
SC		 817 (_("%s: uses different e_flags (0x%lx) fields than previous modules (0x%lx)"),
818 bfd_get_filename (ibfd), (long)new_flags, (long)old_flags);
819 }
820 }
821
822 if (error)
823 bfd_set_error (bfd_error_bad_value);
824
825 return !error;
826}
827
828\f
829static bfd_boolean
58852c27 830iq2000_elf_print_private_bfd_data (bfd *abfd, void * ptr)
a75473eb
SC		 831{
832 FILE *file = (FILE *) ptr;
833 flagword flags;
834
835 BFD_ASSERT (abfd != NULL && ptr != NULL);
836
837 /* Print normal ELF private data. */
838 _bfd_elf_print_private_bfd_data (abfd, ptr);
839
840 flags = elf_elfheader (abfd)->e_flags;
841 fprintf (file, _("private flags = 0x%lx:"), (long)flags);
842
843 switch (flags & EF_IQ2000_CPU_MASK)
844 {
58852c27
NC		 845 case EF_IQ2000_CPU_IQ10:
846 fprintf (file, " -m10");
847 break;
848 case EF_IQ2000_CPU_IQ2000:
849 fprintf (file, " -m2000");
850 break;
851 default:
852 break;
a75473eb
SC		 853 }
854
855 fputc ('\n', file);
60d8b524 856 return TRUE;
a75473eb
SC		 857}
858
859static
860bfd_boolean
58852c27 861iq2000_elf_object_p (bfd *abfd)
a75473eb 862{
a75473eb
SC		 863 bfd_default_set_arch_mach (abfd, bfd_arch_iq2000,
864 elf32_iq2000_machine (abfd));
865 return TRUE;
866}
867
868\f
869#define ELF_ARCH bfd_arch_iq2000
870#define ELF_MACHINE_CODE EM_IQ2000
871#define ELF_MAXPAGESIZE 0x1000
872
873#define TARGET_BIG_SYM bfd_elf32_iq2000_vec
874#define TARGET_BIG_NAME "elf32-iq2000"
875
876#define elf_info_to_howto_rel NULL
877#define elf_info_to_howto iq2000_info_to_howto_rela
878#define elf_backend_relocate_section iq2000_elf_relocate_section
879#define elf_backend_gc_mark_hook iq2000_elf_gc_mark_hook
a75473eb
SC		 880#define elf_backend_check_relocs iq2000_elf_check_relocs
881#define elf_backend_object_p iq2000_elf_object_p
882#define elf_backend_rela_normal 1
883
884#define elf_backend_can_gc_sections 1
885
886#define bfd_elf32_bfd_reloc_type_lookup iq2000_reloc_type_lookup
157090f7 887#define bfd_elf32_bfd_reloc_name_lookup iq2000_reloc_name_lookup
a75473eb
SC		 888#define bfd_elf32_bfd_set_private_flags iq2000_elf_set_private_flags
889#define bfd_elf32_bfd_copy_private_bfd_data iq2000_elf_copy_private_bfd_data
890#define bfd_elf32_bfd_merge_private_bfd_data iq2000_elf_merge_private_bfd_data
891#define bfd_elf32_bfd_print_private_bfd_data iq2000_elf_print_private_bfd_data
892
893#include "elf32-target.h"
GDB Binutils - Deliverables
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