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Mach-O: add objdump -P function_starts to display function starts.
[binutils-gdb.git] / bfd / elf32-iq2000.c
blob9b6a8c53896f3571d66c6b4d16f5a3d438bd6d9d
1 /* IQ2000-specific support for 32-bit ELF.
2 Copyright (C) 2003-2014 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 3 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., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */
19
20 #include "sysdep.h"
21 #include "bfd.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 static bfd_reloc_status_type
238 iq2000_elf_howto_hi16_reloc (bfd *abfd ATTRIBUTE_UNUSED,
239 arelent *reloc_entry,
240 asymbol *symbol,
241 void * data,
242 asection *input_section,
243 bfd *output_bfd,
244 char **error_message ATTRIBUTE_UNUSED)
245 {
246 bfd_reloc_status_type ret;
247 bfd_vma relocation;
248
249 /* If we're relocating and this an external symbol,
250 we don't want to change anything. */
251 if (output_bfd != (bfd *) NULL
252 && (symbol->flags & BSF_SECTION_SYM) == 0
253 && reloc_entry->addend == 0)
254 {
255 reloc_entry->address += input_section->output_offset;
256 return bfd_reloc_ok;
257 }
258
259 if (bfd_is_com_section (symbol->section))
260 relocation = 0;
261 else
262 relocation = symbol->value;
263
264 relocation += symbol->section->output_section->vma;
265 relocation += symbol->section->output_offset;
266 relocation += reloc_entry->addend;
267
268 /* If %lo will have sign-extension, compensate by add 0x10000 to hi portion. */
269 if (relocation & 0x8000)
270 reloc_entry->addend += 0x10000;
271
272 /* Now do the reloc in the usual way. */
273 ret = bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
274 input_section, output_bfd, error_message);
275
276 /* Put it back the way it was. */
277 if (relocation & 0x8000)
278 reloc_entry->addend -= 0x10000;
279
280 return ret;
281 }
282
283 static bfd_reloc_status_type
284 iq2000_elf_relocate_hi16 (bfd *input_bfd,
285 Elf_Internal_Rela *relhi,
286 bfd_byte *contents,
287 bfd_vma value)
288 {
289 bfd_vma insn;
290
291 insn = bfd_get_32 (input_bfd, contents + relhi->r_offset);
292
293 value += relhi->r_addend;
294 value &= 0x7fffffff; /* Mask off top-bit which is Harvard mask bit. */
295
296 /* If top-bit of %lo value is on, this means that %lo will
297 sign-propagate and so we compensate by adding 1 to %hi value. */
298 if (value & 0x8000)
299 value += 0x10000;
300
301 value >>= 16;
302 insn = ((insn & ~0xFFFF) | value);
303
304 bfd_put_32 (input_bfd, insn, contents + relhi->r_offset);
305 return bfd_reloc_ok;
306 }
307
308 static bfd_reloc_status_type
309 iq2000_elf_relocate_offset16 (bfd *input_bfd,
310 Elf_Internal_Rela *rel,
311 bfd_byte *contents,
312 bfd_vma value,
313 bfd_vma location)
314 {
315 bfd_vma insn;
316 bfd_vma jtarget;
317
318 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
319
320 value += rel->r_addend;
321
322 if (value & 3)
323 return bfd_reloc_dangerous;
324
325 jtarget = (value & 0x3fffc) | (location & 0xf0000000L);
326
327 if (jtarget != value)
328 return bfd_reloc_overflow;
329
330 insn = (insn & ~0xFFFF) | ((value >> 2) & 0xFFFF);
331
332 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
333 return bfd_reloc_ok;
334 }
335
336 /* Map BFD reloc types to IQ2000 ELF reloc types. */
337
338 static reloc_howto_type *
339 iq2000_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
340 bfd_reloc_code_real_type code)
341 {
342 /* Note that the iq2000_elf_howto_table is indxed by the R_
343 constants. Thus, the order that the howto records appear in the
344 table *must* match the order of the relocation types defined in
345 include/elf/iq2000.h. */
346
347 switch (code)
348 {
349 case BFD_RELOC_NONE:
350 return &iq2000_elf_howto_table[ (int) R_IQ2000_NONE];
351 case BFD_RELOC_16:
352 return &iq2000_elf_howto_table[ (int) R_IQ2000_16];
353 case BFD_RELOC_32:
354 return &iq2000_elf_howto_table[ (int) R_IQ2000_32];
355 case BFD_RELOC_MIPS_JMP:
356 return &iq2000_elf_howto_table[ (int) R_IQ2000_26];
357 case BFD_RELOC_IQ2000_OFFSET_16:
358 return &iq2000_elf_howto_table[ (int) R_IQ2000_OFFSET_16];
359 case BFD_RELOC_IQ2000_OFFSET_21:
360 return &iq2000_elf_howto_table[ (int) R_IQ2000_OFFSET_21];
361 case BFD_RELOC_16_PCREL_S2:
362 return &iq2000_elf_howto_table[ (int) R_IQ2000_PC16];
363 case BFD_RELOC_HI16:
364 return &iq2000_elf_howto_table[ (int) R_IQ2000_HI16];
365 case BFD_RELOC_IQ2000_UHI16:
366 return &iq2000_elf_howto_table[ (int) R_IQ2000_UHI16];
367 case BFD_RELOC_LO16:
368 return &iq2000_elf_howto_table[ (int) R_IQ2000_LO16];
369 case BFD_RELOC_VTABLE_INHERIT:
370 return &iq2000_elf_vtinherit_howto;
371 case BFD_RELOC_VTABLE_ENTRY:
372 return &iq2000_elf_vtentry_howto;
373 default:
374 /* Pacify gcc -Wall. */
375 return NULL;
376 }
377 return NULL;
378 }
379
380 static reloc_howto_type *
381 iq2000_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, const char *r_name)
382 {
383 unsigned int i;
384
385 for (i = 0;
386 i < (sizeof (iq2000_elf_howto_table)
387 / sizeof (iq2000_elf_howto_table[0]));
388 i++)
389 if (iq2000_elf_howto_table[i].name != NULL
390 && strcasecmp (iq2000_elf_howto_table[i].name, r_name) == 0)
391 return &iq2000_elf_howto_table[i];
392
393 if (strcasecmp (iq2000_elf_vtinherit_howto.name, r_name) == 0)
394 return &iq2000_elf_vtinherit_howto;
395 if (strcasecmp (iq2000_elf_vtentry_howto.name, r_name) == 0)
396 return &iq2000_elf_vtentry_howto;
397
398 return NULL;
399 }
400 \f
401 /* Perform a single relocation. By default we use the standard BFD
402 routines. */
403
404 static bfd_reloc_status_type
405 iq2000_final_link_relocate (reloc_howto_type * howto,
406 bfd * input_bfd,
407 asection * input_section,
408 bfd_byte * contents,
409 Elf_Internal_Rela * rel,
410 bfd_vma relocation)
411 {
412 return _bfd_final_link_relocate (howto, input_bfd, input_section,
413 contents, rel->r_offset,
414 relocation, rel->r_addend);
415 }
416 \f
417 /* Set the howto pointer for a IQ2000 ELF reloc. */
418
419 static void
420 iq2000_info_to_howto_rela (bfd * abfd ATTRIBUTE_UNUSED,
421 arelent * cache_ptr,
422 Elf_Internal_Rela * dst)
423 {
424 unsigned int r_type;
425
426 r_type = ELF32_R_TYPE (dst->r_info);
427 switch (r_type)
428 {
429 case R_IQ2000_GNU_VTINHERIT:
430 cache_ptr->howto = & iq2000_elf_vtinherit_howto;
431 break;
432
433 case R_IQ2000_GNU_VTENTRY:
434 cache_ptr->howto = & iq2000_elf_vtentry_howto;
435 break;
436
437 default:
438 cache_ptr->howto = & iq2000_elf_howto_table [r_type];
439 break;
440 }
441 }
442
443 /* Look through the relocs for a section during the first phase.
444 Since we don't do .gots or .plts, we just need to consider the
445 virtual table relocs for gc. */
446
447 static bfd_boolean
448 iq2000_elf_check_relocs (bfd *abfd,
449 struct bfd_link_info *info,
450 asection *sec,
451 const Elf_Internal_Rela *relocs)
452 {
453 Elf_Internal_Shdr *symtab_hdr;
454 struct elf_link_hash_entry **sym_hashes;
455 const Elf_Internal_Rela *rel;
456 const Elf_Internal_Rela *rel_end;
457 bfd_boolean changed = FALSE;
458
459 if (info->relocatable)
460 return TRUE;
461
462 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
463 sym_hashes = elf_sym_hashes (abfd);
464
465 rel_end = relocs + sec->reloc_count;
466 for (rel = relocs; rel < rel_end; rel++)
467 {
468 struct elf_link_hash_entry *h;
469 unsigned long r_symndx;
470
471 r_symndx = ELF32_R_SYM (rel->r_info);
472 if (r_symndx < symtab_hdr->sh_info)
473 h = NULL;
474 else
475 {
476 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
477 while (h->root.type == bfd_link_hash_indirect
478 || h->root.type == bfd_link_hash_warning)
479 h = (struct elf_link_hash_entry *) h->root.u.i.link;
480
481 /* PR15323, ref flags aren't set for references in the same
482 object. */
483 h->root.non_ir_ref = 1;
484 }
485
486 switch (ELF32_R_TYPE (rel->r_info))
487 {
488 /* This relocation describes the C++ object vtable
489 hierarchy. Reconstruct it for later use during GC. */
490 case R_IQ2000_GNU_VTINHERIT:
491 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
492 return FALSE;
493 break;
494
495 /* This relocation describes which C++ vtable entries
496 are actually used. Record for later use during GC. */
497 case R_IQ2000_GNU_VTENTRY:
498 BFD_ASSERT (h != NULL);
499 if (h != NULL
500 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
501 return FALSE;
502 break;
503
504 case R_IQ2000_32:
505 /* For debug section, change to special harvard-aware relocations. */
506 if (CONST_STRNEQ (sec->name, ".debug")
507 || CONST_STRNEQ (sec->name, ".stab")
508 || CONST_STRNEQ (sec->name, ".eh_frame"))
509 {
510 ((Elf_Internal_Rela *) rel)->r_info
511 = ELF32_R_INFO (ELF32_R_SYM (rel->r_info), R_IQ2000_32_DEBUG);
512 changed = TRUE;
513 }
514 break;
515 }
516 }
517
518 if (changed)
519 /* Note that we've changed relocs, otherwise if !info->keep_memory
520 we'll free the relocs and lose our changes. */
521 elf_section_data (sec)->relocs = (Elf_Internal_Rela *) relocs;
522
523 return TRUE;
524 }
525
526 \f
527 /* Relocate a IQ2000 ELF section.
528 There is some attempt to make this function usable for many architectures,
529 both USE_REL and USE_RELA ['twould be nice if such a critter existed],
530 if only to serve as a learning tool.
531
532 The RELOCATE_SECTION function is called by the new ELF backend linker
533 to handle the relocations for a section.
534
535 The relocs are always passed as Rela structures; if the section
536 actually uses Rel structures, the r_addend field will always be
537 zero.
538
539 This function is responsible for adjusting the section contents as
540 necessary, and (if using Rela relocs and generating a relocatable
541 output file) adjusting the reloc addend as necessary.
542
543 This function does not have to worry about setting the reloc
544 address or the reloc symbol index.
545
546 LOCAL_SYMS is a pointer to the swapped in local symbols.
547
548 LOCAL_SECTIONS is an array giving the section in the input file
549 corresponding to the st_shndx field of each local symbol.
550
551 The global hash table entry for the global symbols can be found
552 via elf_sym_hashes (input_bfd).
553
554 When generating relocatable output, this function must handle
555 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
556 going to be the section symbol corresponding to the output
557 section, which means that the addend must be adjusted
558 accordingly. */
559
560 static bfd_boolean
561 iq2000_elf_relocate_section (bfd * output_bfd ATTRIBUTE_UNUSED,
562 struct bfd_link_info * info,
563 bfd * input_bfd,
564 asection * input_section,
565 bfd_byte * contents,
566 Elf_Internal_Rela * relocs,
567 Elf_Internal_Sym * local_syms,
568 asection ** local_sections)
569 {
570 Elf_Internal_Shdr * symtab_hdr;
571 struct elf_link_hash_entry ** sym_hashes;
572 Elf_Internal_Rela * rel;
573 Elf_Internal_Rela * relend;
574
575 symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr;
576 sym_hashes = elf_sym_hashes (input_bfd);
577 relend = relocs + input_section->reloc_count;
578
579 for (rel = relocs; rel < relend; rel ++)
580 {
581 reloc_howto_type * howto;
582 unsigned long r_symndx;
583 Elf_Internal_Sym * sym;
584 asection * sec;
585 struct elf_link_hash_entry * h;
586 bfd_vma relocation;
587 bfd_reloc_status_type r;
588 const char * name = NULL;
589 int r_type;
590
591 r_type = ELF32_R_TYPE (rel->r_info);
592
593 if ( r_type == R_IQ2000_GNU_VTINHERIT
594 || r_type == R_IQ2000_GNU_VTENTRY)
595 continue;
596
597 r_symndx = ELF32_R_SYM (rel->r_info);
598
599 howto = iq2000_elf_howto_table + ELF32_R_TYPE (rel->r_info);
600 h = NULL;
601 sym = NULL;
602 sec = NULL;
603
604 if (r_symndx < symtab_hdr->sh_info)
605 {
606 asection *osec;
607
608 sym = local_syms + r_symndx;
609 osec = sec = local_sections [r_symndx];
610 if ((sec->flags & SEC_MERGE)
611 && ELF_ST_TYPE (sym->st_info) == STT_SECTION)
612 /* This relocation is relative to a section symbol that is
613 going to be merged. Change it so that it is relative
614 to the merged section symbol. */
615 rel->r_addend = _bfd_elf_rel_local_sym (output_bfd, sym, &sec,
616 rel->r_addend);
617
618 relocation = (sec->output_section->vma
619 + sec->output_offset
620 + sym->st_value);
621
622 name = bfd_elf_string_from_elf_section
623 (input_bfd, symtab_hdr->sh_link, sym->st_name);
624 name = (name == NULL) ? bfd_section_name (input_bfd, osec) : name;
625 }
626 else
627 {
628 bfd_boolean unresolved_reloc;
629 bfd_boolean warned, ignored;
630
631 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
632 r_symndx, symtab_hdr, sym_hashes,
633 h, sec, relocation,
634 unresolved_reloc, warned, ignored);
635
636 name = h->root.root.string;
637 }
638
639 if (sec != NULL && discarded_section (sec))
640 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
641 rel, 1, relend, howto, 0, contents);
642
643 if (info->relocatable)
644 continue;
645
646 switch (r_type)
647 {
648 case R_IQ2000_HI16:
649 r = iq2000_elf_relocate_hi16 (input_bfd, rel, contents, relocation);
650 break;
651
652 case R_IQ2000_OFFSET_16:
653 r = iq2000_elf_relocate_offset16 (input_bfd, rel, contents, relocation,
654 input_section->output_section->vma
655 + input_section->output_offset
656 + rel->r_offset);
657 break;
658
659 case R_IQ2000_PC16:
660 rel->r_addend -= 4;
661 /* Fall through. */
662
663 default:
664 r = iq2000_final_link_relocate (howto, input_bfd, input_section,
665 contents, rel, relocation);
666 break;
667 }
668
669 if (r != bfd_reloc_ok)
670 {
671 const char * msg = (const char *) NULL;
672
673 switch (r)
674 {
675 case bfd_reloc_overflow:
676 r = info->callbacks->reloc_overflow
677 (info, (h ? &h->root : NULL), name, howto->name,
678 (bfd_vma) 0, input_bfd, input_section, rel->r_offset);
679 break;
680
681 case bfd_reloc_undefined:
682 r = info->callbacks->undefined_symbol
683 (info, name, input_bfd, input_section, rel->r_offset, TRUE);
684 break;
685
686 case bfd_reloc_outofrange:
687 msg = _("internal error: out of range error");
688 break;
689
690 case bfd_reloc_notsupported:
691 msg = _("internal error: unsupported relocation error");
692 break;
693
694 case bfd_reloc_dangerous:
695 msg = _("internal error: dangerous relocation");
696 break;
697
698 default:
699 msg = _("internal error: unknown error");
700 break;
701 }
702
703 if (msg)
704 r = info->callbacks->warning
705 (info, msg, name, input_bfd, input_section, rel->r_offset);
706
707 if (! r)
708 return FALSE;
709 }
710 }
711
712 return TRUE;
713 }
714 \f
715
716 /* Return the section that should be marked against GC for a given
717 relocation. */
718
719 static asection *
720 iq2000_elf_gc_mark_hook (asection *sec,
721 struct bfd_link_info *info,
722 Elf_Internal_Rela *rel,
723 struct elf_link_hash_entry *h,
724 Elf_Internal_Sym *sym)
725 {
726 if (h != NULL)
727 switch (ELF32_R_TYPE (rel->r_info))
728 {
729 case R_IQ2000_GNU_VTINHERIT:
730 case R_IQ2000_GNU_VTENTRY:
731 return NULL;
732 }
733
734 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
735 }
736
737 \f
738 /* Return the MACH for an e_flags value. */
739
740 static int
741 elf32_iq2000_machine (bfd *abfd)
742 {
743 switch (elf_elfheader (abfd)->e_flags & EF_IQ2000_CPU_MASK)
744 {
745 case EF_IQ2000_CPU_IQ10:
746 return bfd_mach_iq10;
747
748 case EF_IQ2000_CPU_IQ2000:
749 default:
750 return bfd_mach_iq2000;
751 }
752 }
753
754 \f
755 /* Function to set the ELF flag bits. */
756
757 static bfd_boolean
758 iq2000_elf_set_private_flags (bfd *abfd, flagword flags)
759 {
760 elf_elfheader (abfd)->e_flags = flags;
761 elf_flags_init (abfd) = TRUE;
762 return TRUE;
763 }
764
765 /* Merge backend specific data from an object
766 file to the output object file when linking. */
767
768 static bfd_boolean
769 iq2000_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
770 {
771 flagword old_flags, old_partial;
772 flagword new_flags, new_partial;
773 bfd_boolean error = FALSE;
774 char new_opt[80];
775 char old_opt[80];
776
777 new_opt[0] = old_opt[0] = '\0';
778 new_flags = elf_elfheader (ibfd)->e_flags;
779 old_flags = elf_elfheader (obfd)->e_flags;
780
781 if (!elf_flags_init (obfd))
782 {
783 /* First call, no flags set. */
784 elf_flags_init (obfd) = TRUE;
785 elf_elfheader (obfd)->e_flags = new_flags;
786 }
787
788 else if (new_flags != old_flags)
789 {
790 /* Warn if different cpu is used, but allow a
791 specific cpu to override the generic cpu. */
792 new_partial = (new_flags & EF_IQ2000_CPU_MASK);
793 old_partial = (old_flags & EF_IQ2000_CPU_MASK);
794
795 if (new_partial != old_partial)
796 {
797 switch (new_partial)
798 {
799 case EF_IQ2000_CPU_IQ10:
800 strcat (new_opt, " -m10");
801 break;
802
803 default:
804 case EF_IQ2000_CPU_IQ2000:
805 strcat (new_opt, " -m2000");
806 break;
807 }
808
809 switch (old_partial)
810 {
811 case EF_IQ2000_CPU_IQ10:
812 strcat (old_opt, " -m10");
813 break;
814
815 default:
816 case EF_IQ2000_CPU_IQ2000:
817 strcat (old_opt, " -m2000");
818 break;
819 }
820 }
821
822 /* Print out any mismatches from above. */
823 if (new_opt[0])
824 {
825 error = TRUE;
826 _bfd_error_handler
827 (_("%s: compiled with %s and linked with modules compiled with %s"),
828 bfd_get_filename (ibfd), new_opt, old_opt);
829 }
830
831 new_flags &= ~ EF_IQ2000_ALL_FLAGS;
832 old_flags &= ~ EF_IQ2000_ALL_FLAGS;
833
834 /* Warn about any other mismatches. */
835 if (new_flags != old_flags)
836 {
837 error = TRUE;
838
839 _bfd_error_handler
840 (_("%s: uses different e_flags (0x%lx) fields than previous modules (0x%lx)"),
841 bfd_get_filename (ibfd), (long)new_flags, (long)old_flags);
842 }
843 }
844
845 if (error)
846 bfd_set_error (bfd_error_bad_value);
847
848 return !error;
849 }
850
851 \f
852 static bfd_boolean
853 iq2000_elf_print_private_bfd_data (bfd *abfd, void * ptr)
854 {
855 FILE *file = (FILE *) ptr;
856 flagword flags;
857
858 BFD_ASSERT (abfd != NULL && ptr != NULL);
859
860 /* Print normal ELF private data. */
861 _bfd_elf_print_private_bfd_data (abfd, ptr);
862
863 flags = elf_elfheader (abfd)->e_flags;
864 fprintf (file, _("private flags = 0x%lx:"), (unsigned long) flags);
865
866 switch (flags & EF_IQ2000_CPU_MASK)
867 {
868 case EF_IQ2000_CPU_IQ10:
869 fprintf (file, " -m10");
870 break;
871 case EF_IQ2000_CPU_IQ2000:
872 fprintf (file, " -m2000");
873 break;
874 default:
875 break;
876 }
877
878 fputc ('\n', file);
879 return TRUE;
880 }
881
882 static
883 bfd_boolean
884 iq2000_elf_object_p (bfd *abfd)
885 {
886 bfd_default_set_arch_mach (abfd, bfd_arch_iq2000,
887 elf32_iq2000_machine (abfd));
888 return TRUE;
889 }
890
891 \f
892 #define ELF_ARCH bfd_arch_iq2000
893 #define ELF_MACHINE_CODE EM_IQ2000
894 #define ELF_MAXPAGESIZE 0x1000
895
896 #define TARGET_BIG_SYM bfd_elf32_iq2000_vec
897 #define TARGET_BIG_NAME "elf32-iq2000"
898
899 #define elf_info_to_howto_rel NULL
900 #define elf_info_to_howto iq2000_info_to_howto_rela
901 #define elf_backend_relocate_section iq2000_elf_relocate_section
902 #define elf_backend_gc_mark_hook iq2000_elf_gc_mark_hook
903 #define elf_backend_check_relocs iq2000_elf_check_relocs
904 #define elf_backend_object_p iq2000_elf_object_p
905 #define elf_backend_rela_normal 1
906
907 #define elf_backend_can_gc_sections 1
908
909 #define bfd_elf32_bfd_reloc_type_lookup iq2000_reloc_type_lookup
910 #define bfd_elf32_bfd_reloc_name_lookup iq2000_reloc_name_lookup
911 #define bfd_elf32_bfd_set_private_flags iq2000_elf_set_private_flags
912 #define bfd_elf32_bfd_merge_private_bfd_data iq2000_elf_merge_private_bfd_data
913 #define bfd_elf32_bfd_print_private_bfd_data iq2000_elf_print_private_bfd_data
914
915 #include "elf32-target.h"
The GNU Binutils are a collection of binary tools.