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2002-02-12 H.J. Lu <hongjiu.lu@intel.com>
[thirdparty/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
cd123cb7 9 the Free Software Foundation; either version 3 of the License, or
58852c27 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 20
a75473eb 21#include "sysdep.h"
3db64b00 22#include "bfd.h"
a75473eb
SC		 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;
5582a088 427 struct elf_link_hash_entry **sym_hashes;
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);
a75473eb
SC		 437
438 rel_end = relocs + sec->reloc_count;
439 for (rel = relocs; rel < rel_end; rel++)
440 {
441 struct elf_link_hash_entry *h;
442 unsigned long r_symndx;
443
444 r_symndx = ELF32_R_SYM (rel->r_info);
445 if (r_symndx < symtab_hdr->sh_info)
446 h = NULL;
447 else
973a3492
L		 448 {
449 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
450 while (h->root.type == bfd_link_hash_indirect
451 || h->root.type == bfd_link_hash_warning)
452 h = (struct elf_link_hash_entry *) h->root.u.i.link;
453 }
a75473eb
SC		 454
455 switch (ELF32_R_TYPE (rel->r_info))
456 {
58852c27
NC		 457 /* This relocation describes the C++ object vtable
458 hierarchy. Reconstruct it for later use during GC. */
a75473eb 459 case R_IQ2000_GNU_VTINHERIT:
c152c796 460 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
a75473eb
SC		 461 return FALSE;
462 break;
463
58852c27
NC		 464 /* This relocation describes which C++ vtable entries
465 are actually used. Record for later use during GC. */
a75473eb 466 case R_IQ2000_GNU_VTENTRY:
d17e0c6e
JB		 467 BFD_ASSERT (h != NULL);
468 if (h != NULL
469 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
a75473eb
SC		 470 return FALSE;
471 break;
472
473 case R_IQ2000_32:
58852c27 474 /* For debug section, change to special harvard-aware relocations. */
0112cd26
NC		 475 if (CONST_STRNEQ (sec->name, ".debug")
476 || CONST_STRNEQ (sec->name, ".stab")
477 || CONST_STRNEQ (sec->name, ".eh_frame"))
60d8b524
AM		 478 {
479 ((Elf_Internal_Rela *) rel)->r_info
480 = ELF32_R_INFO (ELF32_R_SYM (rel->r_info), R_IQ2000_32_DEBUG);
481 changed = TRUE;
482 }
a75473eb
SC		 483 break;
484 }
485 }
60d8b524
AM		 486
487 if (changed)
488 /* Note that we've changed relocs, otherwise if !info->keep_memory
489 we'll free the relocs and lose our changes. */
d5cb4bb8 490 elf_section_data (sec)->relocs = (Elf_Internal_Rela *) relocs;
60d8b524 491
a75473eb
SC		 492 return TRUE;
493}
494
495\f
496/* Relocate a IQ2000 ELF section.
497 There is some attempt to make this function usable for many architectures,
498 both USE_REL and USE_RELA ['twould be nice if such a critter existed],
499 if only to serve as a learning tool.
500
501 The RELOCATE_SECTION function is called by the new ELF backend linker
502 to handle the relocations for a section.
503
504 The relocs are always passed as Rela structures; if the section
505 actually uses Rel structures, the r_addend field will always be
506 zero.
507
508 This function is responsible for adjusting the section contents as
1049f94e 509 necessary, and (if using Rela relocs and generating a relocatable
a75473eb
SC		 510 output file) adjusting the reloc addend as necessary.
511
512 This function does not have to worry about setting the reloc
513 address or the reloc symbol index.
514
515 LOCAL_SYMS is a pointer to the swapped in local symbols.
516
517 LOCAL_SECTIONS is an array giving the section in the input file
518 corresponding to the st_shndx field of each local symbol.
519
520 The global hash table entry for the global symbols can be found
521 via elf_sym_hashes (input_bfd).
522
1049f94e 523 When generating relocatable output, this function must handle
a75473eb
SC		 524 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
525 going to be the section symbol corresponding to the output
526 section, which means that the addend must be adjusted
527 accordingly. */
528
529static bfd_boolean
58852c27
NC		 530iq2000_elf_relocate_section (bfd * output_bfd ATTRIBUTE_UNUSED,
531 struct bfd_link_info * info,
532 bfd * input_bfd,
533 asection * input_section,
534 bfd_byte * contents,
535 Elf_Internal_Rela * relocs,
536 Elf_Internal_Sym * local_syms,
537 asection ** local_sections)
a75473eb
SC		 538{
539 Elf_Internal_Shdr * symtab_hdr;
540 struct elf_link_hash_entry ** sym_hashes;
541 Elf_Internal_Rela * rel;
542 Elf_Internal_Rela * relend;
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
a75473eb
SC		 568 howto = iq2000_elf_howto_table + ELF32_R_TYPE (rel->r_info);
569 h = NULL;
570 sym = NULL;
571 sec = NULL;
572
573 if (r_symndx < symtab_hdr->sh_info)
574 {
575 sym = local_syms + r_symndx;
576 sec = local_sections [r_symndx];
577 relocation = (sec->output_section->vma
578 + sec->output_offset
579 + sym->st_value);
580
581 name = bfd_elf_string_from_elf_section
582 (input_bfd, symtab_hdr->sh_link, sym->st_name);
583 name = (name == NULL) ? bfd_section_name (input_bfd, sec) : name;
a75473eb
SC		 584 }
585 else
586 {
560e09e9
NC		 587 bfd_boolean unresolved_reloc;
588 bfd_boolean warned;
589
b2a8e766
AM		 590 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
591 r_symndx, symtab_hdr, sym_hashes,
592 h, sec, relocation,
593 unresolved_reloc, warned);
a75473eb
SC		 594
595 name = h->root.root.string;
a75473eb
SC		 596 }
597
ab96bf03
AM		 598 if (sec != NULL && elf_discarded_section (sec))
599 {
600 /* For relocs against symbols from removed linkonce sections,
601 or sections discarded by a linker script, we just want the
602 section contents zeroed. Avoid any special processing. */
603 _bfd_clear_contents (howto, input_bfd, contents + rel->r_offset);
604 rel->r_info = 0;
605 rel->r_addend = 0;
606 continue;
607 }
608
609 if (info->relocatable)
610 continue;
611
a75473eb
SC		 612 switch (r_type)
613 {
614 case R_IQ2000_HI16:
615 r = iq2000_elf_relocate_hi16 (input_bfd, rel, contents, relocation);
616 break;
617
618 case R_IQ2000_PC16:
619 rel->r_addend -= 4;
620 /* Fall through. */
621
622 default:
623 r = iq2000_final_link_relocate (howto, input_bfd, input_section,
624 contents, rel, relocation);
625 break;
626 }
627
628 if (r != bfd_reloc_ok)
629 {
630 const char * msg = (const char *) NULL;
631
632 switch (r)
633 {
634 case bfd_reloc_overflow:
635 r = info->callbacks->reloc_overflow
dfeffb9f
L		 636 (info, (h ? &h->root : NULL), name, howto->name,
637 (bfd_vma) 0, input_bfd, input_section, rel->r_offset);
a75473eb
SC		 638 break;
639
640 case bfd_reloc_undefined:
641 r = info->callbacks->undefined_symbol
642 (info, name, input_bfd, input_section, rel->r_offset, TRUE);
643 break;
644
645 case bfd_reloc_outofrange:
646 msg = _("internal error: out of range error");
647 break;
648
649 case bfd_reloc_notsupported:
650 msg = _("internal error: unsupported relocation error");
651 break;
652
653 case bfd_reloc_dangerous:
654 msg = _("internal error: dangerous relocation");
655 break;
656
657 default:
658 msg = _("internal error: unknown error");
659 break;
660 }
661
662 if (msg)
663 r = info->callbacks->warning
664 (info, msg, name, input_bfd, input_section, rel->r_offset);
665
666 if (! r)
667 return FALSE;
668 }
669 }
670
671 return TRUE;
672}
673\f
674
a75473eb
SC		 675/* Return the section that should be marked against GC for a given
676 relocation. */
677
678static asection *
07adf181
AM		 679iq2000_elf_gc_mark_hook (asection *sec,
680 struct bfd_link_info *info,
681 Elf_Internal_Rela *rel,
682 struct elf_link_hash_entry *h,
683 Elf_Internal_Sym *sym)
a75473eb 684{
07adf181
AM		 685 if (h != NULL)
686 switch (ELF32_R_TYPE (rel->r_info))
687 {
688 case R_IQ2000_GNU_VTINHERIT:
689 case R_IQ2000_GNU_VTENTRY:
690 return NULL;
691 }
692
693 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
a75473eb
SC		 694}
695
696\f
697/* Return the MACH for an e_flags value. */
698
699static int
58852c27 700elf32_iq2000_machine (bfd *abfd)
a75473eb
SC		 701{
702 switch (elf_elfheader (abfd)->e_flags & EF_IQ2000_CPU_MASK)
703 {
58852c27
NC		 704 case EF_IQ2000_CPU_IQ10:
705 return bfd_mach_iq10;
a75473eb 706
58852c27
NC		 707 case EF_IQ2000_CPU_IQ2000:
708 default:
709 return bfd_mach_iq2000;
710 }
a75473eb
SC		 711}
712
713\f
714/* Function to set the ELF flag bits. */
715
716static bfd_boolean
58852c27 717iq2000_elf_set_private_flags (bfd *abfd, flagword flags)
a75473eb
SC		 718{
719 elf_elfheader (abfd)->e_flags = flags;
720 elf_flags_init (abfd) = TRUE;
721 return TRUE;
722}
723
724/* Copy backend specific data from one object module to another. */
725
726static bfd_boolean
58852c27 727iq2000_elf_copy_private_bfd_data (bfd *ibfd, bfd *obfd)
a75473eb
SC		 728{
729 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
730 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
731 return TRUE;
732
733 BFD_ASSERT (!elf_flags_init (obfd)
734 || elf_elfheader (obfd)->e_flags == elf_elfheader (ibfd)->e_flags);
735
736 elf_elfheader (obfd)->e_flags = elf_elfheader (ibfd)->e_flags;
737 elf_flags_init (obfd) = TRUE;
104d59d1
JM		 738
739 /* Copy object attributes. */
740 _bfd_elf_copy_obj_attributes (ibfd, obfd);
741
a75473eb
SC		 742 return TRUE;
743}
744
58852c27
NC		 745/* Merge backend specific data from an object
746 file to the output object file when linking. */
a75473eb
SC		 747
748static bfd_boolean
58852c27 749iq2000_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
a75473eb
SC		 750{
751 flagword old_flags, old_partial;
752 flagword new_flags, new_partial;
753 bfd_boolean error = FALSE;
754 char new_opt[80];
755 char old_opt[80];
756
757 new_opt[0] = old_opt[0] = '\0';
758 new_flags = elf_elfheader (ibfd)->e_flags;
759 old_flags = elf_elfheader (obfd)->e_flags;
760
a75473eb
SC		 761 if (!elf_flags_init (obfd))
762 {
763 /* First call, no flags set. */
764 elf_flags_init (obfd) = TRUE;
765 elf_elfheader (obfd)->e_flags = new_flags;
766 }
767
58852c27 768 else if (new_flags != old_flags)
a75473eb 769 {
58852c27
NC		 770 /* Warn if different cpu is used, but allow a
771 specific cpu to override the generic cpu. */
a75473eb
SC		 772 new_partial = (new_flags & EF_IQ2000_CPU_MASK);
773 old_partial = (old_flags & EF_IQ2000_CPU_MASK);
a75473eb 774
58852c27 775 if (new_partial != old_partial)
a75473eb
SC		 776 {
777 switch (new_partial)
778 {
58852c27
NC		 779 case EF_IQ2000_CPU_IQ10:
780 strcat (new_opt, " -m10");
781 break;
782
783 default:
784 case EF_IQ2000_CPU_IQ2000:
785 strcat (new_opt, " -m2000");
786 break;
a75473eb
SC		 787 }
788
789 switch (old_partial)
790 {
58852c27
NC		 791 case EF_IQ2000_CPU_IQ10:
792 strcat (old_opt, " -m10");
793 break;
794
795 default:
796 case EF_IQ2000_CPU_IQ2000:
797 strcat (old_opt, " -m2000");
798 break;
a75473eb
SC		 799 }
800 }
801
802 /* Print out any mismatches from above. */
803 if (new_opt[0])
804 {
805 error = TRUE;
58852c27 806 _bfd_error_handler
a75473eb
SC		 807 (_("%s: compiled with %s and linked with modules compiled with %s"),
808 bfd_get_filename (ibfd), new_opt, old_opt);
809 }
810
811 new_flags &= ~ EF_IQ2000_ALL_FLAGS;
812 old_flags &= ~ EF_IQ2000_ALL_FLAGS;
813
814 /* Warn about any other mismatches. */
815 if (new_flags != old_flags)
816 {
817 error = TRUE;
58852c27
NC		 818
819 _bfd_error_handler
a75473eb
SC		 820 (_("%s: uses different e_flags (0x%lx) fields than previous modules (0x%lx)"),
821 bfd_get_filename (ibfd), (long)new_flags, (long)old_flags);
822 }
823 }
824
825 if (error)
826 bfd_set_error (bfd_error_bad_value);
827
828 return !error;
829}
830
831\f
832static bfd_boolean
58852c27 833iq2000_elf_print_private_bfd_data (bfd *abfd, void * ptr)
a75473eb
SC		 834{
835 FILE *file = (FILE *) ptr;
836 flagword flags;
837
838 BFD_ASSERT (abfd != NULL && ptr != NULL);
839
840 /* Print normal ELF private data. */
841 _bfd_elf_print_private_bfd_data (abfd, ptr);
842
843 flags = elf_elfheader (abfd)->e_flags;
844 fprintf (file, _("private flags = 0x%lx:"), (long)flags);
845
846 switch (flags & EF_IQ2000_CPU_MASK)
847 {
58852c27
NC		 848 case EF_IQ2000_CPU_IQ10:
849 fprintf (file, " -m10");
850 break;
851 case EF_IQ2000_CPU_IQ2000:
852 fprintf (file, " -m2000");
853 break;
854 default:
855 break;
a75473eb
SC		 856 }
857
858 fputc ('\n', file);
60d8b524 859 return TRUE;
a75473eb
SC		 860}
861
862static
863bfd_boolean
58852c27 864iq2000_elf_object_p (bfd *abfd)
a75473eb 865{
a75473eb
SC		 866 bfd_default_set_arch_mach (abfd, bfd_arch_iq2000,
867 elf32_iq2000_machine (abfd));
868 return TRUE;
869}
870
871\f
872#define ELF_ARCH bfd_arch_iq2000
873#define ELF_MACHINE_CODE EM_IQ2000
874#define ELF_MAXPAGESIZE 0x1000
875
876#define TARGET_BIG_SYM bfd_elf32_iq2000_vec
877#define TARGET_BIG_NAME "elf32-iq2000"
878
879#define elf_info_to_howto_rel NULL
880#define elf_info_to_howto iq2000_info_to_howto_rela
881#define elf_backend_relocate_section iq2000_elf_relocate_section
882#define elf_backend_gc_mark_hook iq2000_elf_gc_mark_hook
a75473eb
SC		 883#define elf_backend_check_relocs iq2000_elf_check_relocs
884#define elf_backend_object_p iq2000_elf_object_p
885#define elf_backend_rela_normal 1
886
887#define elf_backend_can_gc_sections 1
888
889#define bfd_elf32_bfd_reloc_type_lookup iq2000_reloc_type_lookup
157090f7 890#define bfd_elf32_bfd_reloc_name_lookup iq2000_reloc_name_lookup
a75473eb
SC		 891#define bfd_elf32_bfd_set_private_flags iq2000_elf_set_private_flags
892#define bfd_elf32_bfd_copy_private_bfd_data iq2000_elf_copy_private_bfd_data
893#define bfd_elf32_bfd_merge_private_bfd_data iq2000_elf_merge_private_bfd_data
894#define bfd_elf32_bfd_print_private_bfd_data iq2000_elf_print_private_bfd_data
895
896#include "elf32-target.h"
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