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[gdb/gnu.git] / bfd / elf32-iq2000.c
blob3a90a996982b9a297d55b810ba0996d9231bb25e
1 /* IQ2000-specific support for 32-bit ELF.
2 Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2010, 2012
3 Free Software Foundation, Inc.
4
5 This file is part of BFD, the Binary File Descriptor library.
6
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
11
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
16
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */
20
21 #include "sysdep.h"
22 #include "bfd.h"
23 #include "libbfd.h"
24 #include "elf-bfd.h"
25 #include "elf/iq2000.h"
26
27 /* Forward declarations. */
28
29 static bfd_reloc_status_type iq2000_elf_howto_hi16_reloc (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
30
31 \f
32 static reloc_howto_type iq2000_elf_howto_table [] =
33 {
34 /* This reloc does nothing. */
35
36 HOWTO (R_IQ2000_NONE, /* type */
37 0, /* rightshift */
38 2, /* size (0 = byte, 1 = short, 2 = long) */
39 32, /* bitsize */
40 FALSE, /* pc_relative */
41 0, /* bitpos */
42 complain_overflow_bitfield, /* complain_on_overflow */
43 bfd_elf_generic_reloc, /* special_function */
44 "R_IQ2000_NONE", /* name */
45 FALSE, /* partial_inplace */
46 0, /* src_mask */
47 0, /* dst_mask */
48 FALSE), /* pcrel_offset */
49
50 /* A 16 bit absolute relocation. */
51 HOWTO (R_IQ2000_16, /* type */
52 0, /* rightshift */
53 1, /* size (0 = byte, 1 = short, 2 = long) */
54 16, /* bitsize */
55 FALSE, /* pc_relative */
56 0, /* bitpos */
57 complain_overflow_bitfield, /* complain_on_overflow */
58 bfd_elf_generic_reloc, /* special_function */
59 "R_IQ2000_16", /* name */
60 FALSE, /* partial_inplace */
61 0x0000, /* src_mask */
62 0xffff, /* dst_mask */
63 FALSE), /* pcrel_offset */
64
65 /* A 32 bit absolute relocation. */
66 HOWTO (R_IQ2000_32, /* type */
67 0, /* rightshift */
68 2, /* size (0 = byte, 1 = short, 2 = long) */
69 31, /* bitsize */
70 FALSE, /* pc_relative */
71 0, /* bitpos */
72 complain_overflow_bitfield, /* complain_on_overflow */
73 bfd_elf_generic_reloc, /* special_function */
74 "R_IQ2000_32", /* name */
75 FALSE, /* partial_inplace */
76 0x00000000, /* src_mask */
77 0x7fffffff, /* dst_mask */
78 FALSE), /* pcrel_offset */
79
80 /* 26 bit branch address. */
81 HOWTO (R_IQ2000_26, /* type */
82 2, /* rightshift */
83 2, /* size (0 = byte, 1 = short, 2 = long) */
84 26, /* bitsize */
85 FALSE, /* pc_relative */
86 0, /* bitpos */
87 complain_overflow_dont, /* complain_on_overflow */
88 /* This needs complex overflow
89 detection, because the upper four
90 bits must match the PC. */
91 bfd_elf_generic_reloc, /* special_function */
92 "R_IQ2000_26", /* name */
93 FALSE, /* partial_inplace */
94 0x00000000, /* src_mask */
95 0x03ffffff, /* dst_mask */
96 FALSE), /* pcrel_offset */
97
98 /* 16 bit PC relative reference. */
99 HOWTO (R_IQ2000_PC16, /* type */
100 2, /* rightshift */
101 2, /* size (0 = byte, 1 = short, 2 = long) */
102 16, /* bitsize */
103 TRUE, /* pc_relative */
104 0, /* bitpos */
105 complain_overflow_signed, /* complain_on_overflow */
106 bfd_elf_generic_reloc, /* special_function */
107 "R_IQ2000_PC16", /* name */
108 FALSE, /* partial_inplace */
109 0x0000, /* src_mask */
110 0xffff, /* dst_mask */
111 TRUE), /* pcrel_offset */
112
113 /* high 16 bits of symbol value. */
114 HOWTO (R_IQ2000_HI16, /* type */
115 16, /* rightshift */
116 2, /* size (0 = byte, 1 = short, 2 = long) */
117 15, /* bitsize */
118 FALSE, /* pc_relative */
119 0, /* bitpos */
120 complain_overflow_dont, /* complain_on_overflow */
121 iq2000_elf_howto_hi16_reloc, /* special_function */
122 "R_IQ2000_HI16", /* name */
123 FALSE, /* partial_inplace */
124 0x0000, /* src_mask */
125 0x7fff, /* dst_mask */
126 FALSE), /* pcrel_offset */
127
128 /* Low 16 bits of symbol value. */
129 HOWTO (R_IQ2000_LO16, /* type */
130 0, /* rightshift */
131 2, /* size (0 = byte, 1 = short, 2 = long) */
132 16, /* bitsize */
133 FALSE, /* pc_relative */
134 0, /* bitpos */
135 complain_overflow_dont, /* complain_on_overflow */
136 bfd_elf_generic_reloc, /* special_function */
137 "R_IQ2000_LO16", /* name */
138 FALSE, /* partial_inplace */
139 0x0000, /* src_mask */
140 0xffff, /* dst_mask */
141 FALSE), /* pcrel_offset */
142
143 /* 16-bit jump offset. */
144 HOWTO (R_IQ2000_OFFSET_16, /* type */
145 2, /* rightshift */
146 2, /* size (0 = byte, 1 = short, 2 = long) */
147 16, /* bitsize */
148 FALSE, /* pc_relative */
149 0, /* bitpos */
150 complain_overflow_dont, /* complain_on_overflow */
151 bfd_elf_generic_reloc, /* special_function */
152 "R_IQ2000_OFFSET_16", /* name */
153 FALSE, /* partial_inplace */
154 0x0000, /* src_mask */
155 0xffff, /* dst_mask */
156 FALSE), /* pcrel_offset */
157
158 /* 21-bit jump offset. */
159 HOWTO (R_IQ2000_OFFSET_21, /* type */
160 2, /* rightshift */
161 2, /* size (0 = byte, 1 = short, 2 = long) */
162 21, /* bitsize */
163 FALSE, /* pc_relative */
164 0, /* bitpos */
165 complain_overflow_dont, /* complain_on_overflow */
166 bfd_elf_generic_reloc, /* special_function */
167 "R_IQ2000_OFFSET_21", /* name */
168 FALSE, /* partial_inplace */
169 0x000000, /* src_mask */
170 0x1fffff, /* dst_mask */
171 FALSE), /* pcrel_offset */
172
173 /* unsigned high 16 bits of value. */
174 HOWTO (R_IQ2000_OFFSET_21, /* type */
175 16, /* rightshift */
176 2, /* size (0 = byte, 1 = short, 2 = long) */
177 16, /* bitsize */
178 FALSE, /* pc_relative */
179 0, /* bitpos */
180 complain_overflow_dont, /* complain_on_overflow */
181 bfd_elf_generic_reloc, /* special_function */
182 "R_IQ2000_UHI16", /* name */
183 FALSE, /* partial_inplace */
184 0x0000, /* src_mask */
185 0x7fff, /* dst_mask */
186 FALSE), /* pcrel_offset */
187
188 /* A 32 bit absolute debug relocation. */
189 HOWTO (R_IQ2000_32_DEBUG, /* type */
190 0, /* rightshift */
191 2, /* size (0 = byte, 1 = short, 2 = long) */
192 32, /* bitsize */
193 FALSE, /* pc_relative */
194 0, /* bitpos */
195 complain_overflow_bitfield, /* complain_on_overflow */
196 bfd_elf_generic_reloc, /* special_function */
197 "R_IQ2000_32", /* name */
198 FALSE, /* partial_inplace */
199 0x00000000, /* src_mask */
200 0xffffffff, /* dst_mask */
201 FALSE), /* pcrel_offset */
202
203 };
204
205 /* GNU extension to record C++ vtable hierarchy. */
206 static reloc_howto_type iq2000_elf_vtinherit_howto =
207 HOWTO (R_IQ2000_GNU_VTINHERIT, /* type */
208 0, /* rightshift */
209 2, /* size (0 = byte, 1 = short, 2 = long) */
210 0, /* bitsize */
211 FALSE, /* pc_relative */
212 0, /* bitpos */
213 complain_overflow_dont, /* complain_on_overflow */
214 NULL, /* special_function */
215 "R_IQ2000_GNU_VTINHERIT", /* name */
216 FALSE, /* partial_inplace */
217 0, /* src_mask */
218 0, /* dst_mask */
219 FALSE); /* pcrel_offset */
220
221 /* GNU extension to record C++ vtable member usage. */
222 static reloc_howto_type iq2000_elf_vtentry_howto =
223 HOWTO (R_IQ2000_GNU_VTENTRY, /* type */
224 0, /* rightshift */
225 2, /* size (0 = byte, 1 = short, 2 = long) */
226 0, /* bitsize */
227 FALSE, /* pc_relative */
228 0, /* bitpos */
229 complain_overflow_dont, /* complain_on_overflow */
230 NULL, /* special_function */
231 "R_IQ2000_GNU_VTENTRY", /* name */
232 FALSE, /* partial_inplace */
233 0, /* src_mask */
234 0, /* dst_mask */
235 FALSE); /* pcrel_offset */
236
237 \f
238 static bfd_reloc_status_type
239 iq2000_elf_howto_hi16_reloc (bfd *abfd ATTRIBUTE_UNUSED,
240 arelent *reloc_entry,
241 asymbol *symbol,
242 void * data,
243 asection *input_section,
244 bfd *output_bfd,
245 char **error_message ATTRIBUTE_UNUSED)
246 {
247 bfd_reloc_status_type ret;
248 bfd_vma relocation;
249
250 /* If we're relocating and this an external symbol,
251 we don't want to change anything. */
252 if (output_bfd != (bfd *) NULL
253 && (symbol->flags & BSF_SECTION_SYM) == 0
254 && reloc_entry->addend == 0)
255 {
256 reloc_entry->address += input_section->output_offset;
257 return bfd_reloc_ok;
258 }
259
260 if (bfd_is_com_section (symbol->section))
261 relocation = 0;
262 else
263 relocation = symbol->value;
264
265 relocation += symbol->section->output_section->vma;
266 relocation += symbol->section->output_offset;
267 relocation += reloc_entry->addend;
268
269 /* If %lo will have sign-extension, compensate by add 0x10000 to hi portion. */
270 if (relocation & 0x8000)
271 reloc_entry->addend += 0x10000;
272
273 /* Now do the reloc in the usual way. */
274 ret = bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
275 input_section, output_bfd, error_message);
276
277 /* Put it back the way it was. */
278 if (relocation & 0x8000)
279 reloc_entry->addend -= 0x10000;
280
281 return ret;
282 }
283
284 static bfd_reloc_status_type
285 iq2000_elf_relocate_hi16 (bfd *input_bfd,
286 Elf_Internal_Rela *relhi,
287 bfd_byte *contents,
288 bfd_vma value)
289 {
290 bfd_vma insn;
291
292 insn = bfd_get_32 (input_bfd, contents + relhi->r_offset);
293
294 value += relhi->r_addend;
295 value &= 0x7fffffff; /* Mask off top-bit which is Harvard mask bit. */
296
297 /* If top-bit of %lo value is on, this means that %lo will
298 sign-propagate and so we compensate by adding 1 to %hi value. */
299 if (value & 0x8000)
300 value += 0x10000;
301
302 value >>= 16;
303 insn = ((insn & ~0xFFFF) | value);
304
305 bfd_put_32 (input_bfd, insn, contents + relhi->r_offset);
306 return bfd_reloc_ok;
307 }
308
309 static bfd_reloc_status_type
310 iq2000_elf_relocate_offset16 (bfd *input_bfd,
311 Elf_Internal_Rela *rel,
312 bfd_byte *contents,
313 bfd_vma value,
314 bfd_vma location)
315 {
316 bfd_vma insn;
317 bfd_vma jtarget;
318
319 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
320
321 value += rel->r_addend;
322
323 if (value & 3)
324 return bfd_reloc_dangerous;
325
326 jtarget = (value & 0x3fffc) | (location & 0xf0000000L);
327
328 if (jtarget != value)
329 return bfd_reloc_overflow;
330
331 insn = (insn & ~0xFFFF) | ((value >> 2) & 0xFFFF);
332
333 bfd_put_32 (input_bfd, insn, contents + rel->r_offset);
334 return bfd_reloc_ok;
335 }
336
337 /* Map BFD reloc types to IQ2000 ELF reloc types. */
338
339 static reloc_howto_type *
340 iq2000_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
341 bfd_reloc_code_real_type code)
342 {
343 /* Note that the iq2000_elf_howto_table is indxed by the R_
344 constants. Thus, the order that the howto records appear in the
345 table *must* match the order of the relocation types defined in
346 include/elf/iq2000.h. */
347
348 switch (code)
349 {
350 case BFD_RELOC_NONE:
351 return &iq2000_elf_howto_table[ (int) R_IQ2000_NONE];
352 case BFD_RELOC_16:
353 return &iq2000_elf_howto_table[ (int) R_IQ2000_16];
354 case BFD_RELOC_32:
355 return &iq2000_elf_howto_table[ (int) R_IQ2000_32];
356 case BFD_RELOC_MIPS_JMP:
357 return &iq2000_elf_howto_table[ (int) R_IQ2000_26];
358 case BFD_RELOC_IQ2000_OFFSET_16:
359 return &iq2000_elf_howto_table[ (int) R_IQ2000_OFFSET_16];
360 case BFD_RELOC_IQ2000_OFFSET_21:
361 return &iq2000_elf_howto_table[ (int) R_IQ2000_OFFSET_21];
362 case BFD_RELOC_16_PCREL_S2:
363 return &iq2000_elf_howto_table[ (int) R_IQ2000_PC16];
364 case BFD_RELOC_HI16:
365 return &iq2000_elf_howto_table[ (int) R_IQ2000_HI16];
366 case BFD_RELOC_IQ2000_UHI16:
367 return &iq2000_elf_howto_table[ (int) R_IQ2000_UHI16];
368 case BFD_RELOC_LO16:
369 return &iq2000_elf_howto_table[ (int) R_IQ2000_LO16];
370 case BFD_RELOC_VTABLE_INHERIT:
371 return &iq2000_elf_vtinherit_howto;
372 case BFD_RELOC_VTABLE_ENTRY:
373 return &iq2000_elf_vtentry_howto;
374 default:
375 /* Pacify gcc -Wall. */
376 return NULL;
377 }
378 return NULL;
379 }
380
381 static reloc_howto_type *
382 iq2000_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, const char *r_name)
383 {
384 unsigned int i;
385
386 for (i = 0;
387 i < (sizeof (iq2000_elf_howto_table)
388 / sizeof (iq2000_elf_howto_table[0]));
389 i++)
390 if (iq2000_elf_howto_table[i].name != NULL
391 && strcasecmp (iq2000_elf_howto_table[i].name, r_name) == 0)
392 return &iq2000_elf_howto_table[i];
393
394 if (strcasecmp (iq2000_elf_vtinherit_howto.name, r_name) == 0)
395 return &iq2000_elf_vtinherit_howto;
396 if (strcasecmp (iq2000_elf_vtentry_howto.name, r_name) == 0)
397 return &iq2000_elf_vtentry_howto;
398
399 return NULL;
400 }
401 \f
402 /* Perform a single relocation. By default we use the standard BFD
403 routines. */
404
405 static bfd_reloc_status_type
406 iq2000_final_link_relocate (reloc_howto_type * howto,
407 bfd * input_bfd,
408 asection * input_section,
409 bfd_byte * contents,
410 Elf_Internal_Rela * rel,
411 bfd_vma relocation)
412 {
413 return _bfd_final_link_relocate (howto, input_bfd, input_section,
414 contents, rel->r_offset,
415 relocation, rel->r_addend);
416 }
417 \f
418 /* Set the howto pointer for a IQ2000 ELF reloc. */
419
420 static void
421 iq2000_info_to_howto_rela (bfd * abfd ATTRIBUTE_UNUSED,
422 arelent * cache_ptr,
423 Elf_Internal_Rela * dst)
424 {
425 unsigned int r_type;
426
427 r_type = ELF32_R_TYPE (dst->r_info);
428 switch (r_type)
429 {
430 case R_IQ2000_GNU_VTINHERIT:
431 cache_ptr->howto = & iq2000_elf_vtinherit_howto;
432 break;
433
434 case R_IQ2000_GNU_VTENTRY:
435 cache_ptr->howto = & iq2000_elf_vtentry_howto;
436 break;
437
438 default:
439 cache_ptr->howto = & iq2000_elf_howto_table [r_type];
440 break;
441 }
442 }
443
444 /* Look through the relocs for a section during the first phase.
445 Since we don't do .gots or .plts, we just need to consider the
446 virtual table relocs for gc. */
447
448 static bfd_boolean
449 iq2000_elf_check_relocs (bfd *abfd,
450 struct bfd_link_info *info,
451 asection *sec,
452 const Elf_Internal_Rela *relocs)
453 {
454 Elf_Internal_Shdr *symtab_hdr;
455 struct elf_link_hash_entry **sym_hashes;
456 const Elf_Internal_Rela *rel;
457 const Elf_Internal_Rela *rel_end;
458 bfd_boolean changed = FALSE;
459
460 if (info->relocatable)
461 return TRUE;
462
463 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
464 sym_hashes = elf_sym_hashes (abfd);
465
466 rel_end = relocs + sec->reloc_count;
467 for (rel = relocs; rel < rel_end; rel++)
468 {
469 struct elf_link_hash_entry *h;
470 unsigned long r_symndx;
471
472 r_symndx = ELF32_R_SYM (rel->r_info);
473 if (r_symndx < symtab_hdr->sh_info)
474 h = NULL;
475 else
476 {
477 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
478 while (h->root.type == bfd_link_hash_indirect
479 || h->root.type == bfd_link_hash_warning)
480 h = (struct elf_link_hash_entry *) h->root.u.i.link;
481
482 /* PR15323, ref flags aren't set for references in the same
483 object. */
484 h->root.non_ir_ref = 1;
485 }
486
487 switch (ELF32_R_TYPE (rel->r_info))
488 {
489 /* This relocation describes the C++ object vtable
490 hierarchy. Reconstruct it for later use during GC. */
491 case R_IQ2000_GNU_VTINHERIT:
492 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
493 return FALSE;
494 break;
495
496 /* This relocation describes which C++ vtable entries
497 are actually used. Record for later use during GC. */
498 case R_IQ2000_GNU_VTENTRY:
499 BFD_ASSERT (h != NULL);
500 if (h != NULL
501 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
502 return FALSE;
503 break;
504
505 case R_IQ2000_32:
506 /* For debug section, change to special harvard-aware relocations. */
507 if (CONST_STRNEQ (sec->name, ".debug")
508 || CONST_STRNEQ (sec->name, ".stab")
509 || CONST_STRNEQ (sec->name, ".eh_frame"))
510 {
511 ((Elf_Internal_Rela *) rel)->r_info
512 = ELF32_R_INFO (ELF32_R_SYM (rel->r_info), R_IQ2000_32_DEBUG);
513 changed = TRUE;
514 }
515 break;
516 }
517 }
518
519 if (changed)
520 /* Note that we've changed relocs, otherwise if !info->keep_memory
521 we'll free the relocs and lose our changes. */
522 elf_section_data (sec)->relocs = (Elf_Internal_Rela *) relocs;
523
524 return TRUE;
525 }
526
527 \f
528 /* Relocate a IQ2000 ELF section.
529 There is some attempt to make this function usable for many architectures,
530 both USE_REL and USE_RELA ['twould be nice if such a critter existed],
531 if only to serve as a learning tool.
532
533 The RELOCATE_SECTION function is called by the new ELF backend linker
534 to handle the relocations for a section.
535
536 The relocs are always passed as Rela structures; if the section
537 actually uses Rel structures, the r_addend field will always be
538 zero.
539
540 This function is responsible for adjusting the section contents as
541 necessary, and (if using Rela relocs and generating a relocatable
542 output file) adjusting the reloc addend as necessary.
543
544 This function does not have to worry about setting the reloc
545 address or the reloc symbol index.
546
547 LOCAL_SYMS is a pointer to the swapped in local symbols.
548
549 LOCAL_SECTIONS is an array giving the section in the input file
550 corresponding to the st_shndx field of each local symbol.
551
552 The global hash table entry for the global symbols can be found
553 via elf_sym_hashes (input_bfd).
554
555 When generating relocatable output, this function must handle
556 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
557 going to be the section symbol corresponding to the output
558 section, which means that the addend must be adjusted
559 accordingly. */
560
561 static bfd_boolean
562 iq2000_elf_relocate_section (bfd * output_bfd ATTRIBUTE_UNUSED,
563 struct bfd_link_info * info,
564 bfd * input_bfd,
565 asection * input_section,
566 bfd_byte * contents,
567 Elf_Internal_Rela * relocs,
568 Elf_Internal_Sym * local_syms,
569 asection ** local_sections)
570 {
571 Elf_Internal_Shdr * symtab_hdr;
572 struct elf_link_hash_entry ** sym_hashes;
573 Elf_Internal_Rela * rel;
574 Elf_Internal_Rela * relend;
575
576 symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr;
577 sym_hashes = elf_sym_hashes (input_bfd);
578 relend = relocs + input_section->reloc_count;
579
580 for (rel = relocs; rel < relend; rel ++)
581 {
582 reloc_howto_type * howto;
583 unsigned long r_symndx;
584 Elf_Internal_Sym * sym;
585 asection * sec;
586 struct elf_link_hash_entry * h;
587 bfd_vma relocation;
588 bfd_reloc_status_type r;
589 const char * name = NULL;
590 int r_type;
591
592 r_type = ELF32_R_TYPE (rel->r_info);
593
594 if ( r_type == R_IQ2000_GNU_VTINHERIT
595 || r_type == R_IQ2000_GNU_VTENTRY)
596 continue;
597
598 r_symndx = ELF32_R_SYM (rel->r_info);
599
600 howto = iq2000_elf_howto_table + ELF32_R_TYPE (rel->r_info);
601 h = NULL;
602 sym = NULL;
603 sec = NULL;
604
605 if (r_symndx < symtab_hdr->sh_info)
606 {
607 asection *osec;
608
609 sym = local_syms + r_symndx;
610 osec = sec = local_sections [r_symndx];
611 if ((sec->flags & SEC_MERGE)
612 && ELF_ST_TYPE (sym->st_info) == STT_SECTION)
613 /* This relocation is relative to a section symbol that is
614 going to be merged. Change it so that it is relative
615 to the merged section symbol. */
616 rel->r_addend = _bfd_elf_rel_local_sym (output_bfd, sym, &sec,
617 rel->r_addend);
618
619 relocation = (sec->output_section->vma
620 + sec->output_offset
621 + sym->st_value);
622
623 name = bfd_elf_string_from_elf_section
624 (input_bfd, symtab_hdr->sh_link, sym->st_name);
625 name = (name == NULL) ? bfd_section_name (input_bfd, osec) : name;
626 }
627 else
628 {
629 bfd_boolean unresolved_reloc;
630 bfd_boolean warned;
631
632 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
633 r_symndx, symtab_hdr, sym_hashes,
634 h, sec, relocation,
635 unresolved_reloc, warned);
636
637 name = h->root.root.string;
638 }
639
640 if (sec != NULL && discarded_section (sec))
641 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
642 rel, 1, relend, howto, 0, contents);
643
644 if (info->relocatable)
645 continue;
646
647 switch (r_type)
648 {
649 case R_IQ2000_HI16:
650 r = iq2000_elf_relocate_hi16 (input_bfd, rel, contents, relocation);
651 break;
652
653 case R_IQ2000_OFFSET_16:
654 r = iq2000_elf_relocate_offset16 (input_bfd, rel, contents, relocation,
655 input_section->output_section->vma
656 + input_section->output_offset
657 + rel->r_offset);
658 break;
659
660 case R_IQ2000_PC16:
661 rel->r_addend -= 4;
662 /* Fall through. */
663
664 default:
665 r = iq2000_final_link_relocate (howto, input_bfd, input_section,
666 contents, rel, relocation);
667 break;
668 }
669
670 if (r != bfd_reloc_ok)
671 {
672 const char * msg = (const char *) NULL;
673
674 switch (r)
675 {
676 case bfd_reloc_overflow:
677 r = info->callbacks->reloc_overflow
678 (info, (h ? &h->root : NULL), name, howto->name,
679 (bfd_vma) 0, input_bfd, input_section, rel->r_offset);
680 break;
681
682 case bfd_reloc_undefined:
683 r = info->callbacks->undefined_symbol
684 (info, name, input_bfd, input_section, rel->r_offset, TRUE);
685 break;
686
687 case bfd_reloc_outofrange:
688 msg = _("internal error: out of range error");
689 break;
690
691 case bfd_reloc_notsupported:
692 msg = _("internal error: unsupported relocation error");
693 break;
694
695 case bfd_reloc_dangerous:
696 msg = _("internal error: dangerous relocation");
697 break;
698
699 default:
700 msg = _("internal error: unknown error");
701 break;
702 }
703
704 if (msg)
705 r = info->callbacks->warning
706 (info, msg, name, input_bfd, input_section, rel->r_offset);
707
708 if (! r)
709 return FALSE;
710 }
711 }
712
713 return TRUE;
714 }
715 \f
716
717 /* Return the section that should be marked against GC for a given
718 relocation. */
719
720 static asection *
721 iq2000_elf_gc_mark_hook (asection *sec,
722 struct bfd_link_info *info,
723 Elf_Internal_Rela *rel,
724 struct elf_link_hash_entry *h,
725 Elf_Internal_Sym *sym)
726 {
727 if (h != NULL)
728 switch (ELF32_R_TYPE (rel->r_info))
729 {
730 case R_IQ2000_GNU_VTINHERIT:
731 case R_IQ2000_GNU_VTENTRY:
732 return NULL;
733 }
734
735 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
736 }
737
738 \f
739 /* Return the MACH for an e_flags value. */
740
741 static int
742 elf32_iq2000_machine (bfd *abfd)
743 {
744 switch (elf_elfheader (abfd)->e_flags & EF_IQ2000_CPU_MASK)
745 {
746 case EF_IQ2000_CPU_IQ10:
747 return bfd_mach_iq10;
748
749 case EF_IQ2000_CPU_IQ2000:
750 default:
751 return bfd_mach_iq2000;
752 }
753 }
754
755 \f
756 /* Function to set the ELF flag bits. */
757
758 static bfd_boolean
759 iq2000_elf_set_private_flags (bfd *abfd, flagword flags)
760 {
761 elf_elfheader (abfd)->e_flags = flags;
762 elf_flags_init (abfd) = TRUE;
763 return TRUE;
764 }
765
766 /* Copy backend specific data from one object module to another. */
767
768 static bfd_boolean
769 iq2000_elf_copy_private_bfd_data (bfd *ibfd, bfd *obfd)
770 {
771 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
772 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
773 return TRUE;
774
775 BFD_ASSERT (!elf_flags_init (obfd)
776 || elf_elfheader (obfd)->e_flags == elf_elfheader (ibfd)->e_flags);
777
778 elf_elfheader (obfd)->e_flags = elf_elfheader (ibfd)->e_flags;
779 elf_flags_init (obfd) = TRUE;
780
781 /* Copy object attributes. */
782 _bfd_elf_copy_obj_attributes (ibfd, obfd);
783
784 return TRUE;
785 }
786
787 /* Merge backend specific data from an object
788 file to the output object file when linking. */
789
790 static bfd_boolean
791 iq2000_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
792 {
793 flagword old_flags, old_partial;
794 flagword new_flags, new_partial;
795 bfd_boolean error = FALSE;
796 char new_opt[80];
797 char old_opt[80];
798
799 new_opt[0] = old_opt[0] = '\0';
800 new_flags = elf_elfheader (ibfd)->e_flags;
801 old_flags = elf_elfheader (obfd)->e_flags;
802
803 if (!elf_flags_init (obfd))
804 {
805 /* First call, no flags set. */
806 elf_flags_init (obfd) = TRUE;
807 elf_elfheader (obfd)->e_flags = new_flags;
808 }
809
810 else if (new_flags != old_flags)
811 {
812 /* Warn if different cpu is used, but allow a
813 specific cpu to override the generic cpu. */
814 new_partial = (new_flags & EF_IQ2000_CPU_MASK);
815 old_partial = (old_flags & EF_IQ2000_CPU_MASK);
816
817 if (new_partial != old_partial)
818 {
819 switch (new_partial)
820 {
821 case EF_IQ2000_CPU_IQ10:
822 strcat (new_opt, " -m10");
823 break;
824
825 default:
826 case EF_IQ2000_CPU_IQ2000:
827 strcat (new_opt, " -m2000");
828 break;
829 }
830
831 switch (old_partial)
832 {
833 case EF_IQ2000_CPU_IQ10:
834 strcat (old_opt, " -m10");
835 break;
836
837 default:
838 case EF_IQ2000_CPU_IQ2000:
839 strcat (old_opt, " -m2000");
840 break;
841 }
842 }
843
844 /* Print out any mismatches from above. */
845 if (new_opt[0])
846 {
847 error = TRUE;
848 _bfd_error_handler
849 (_("%s: compiled with %s and linked with modules compiled with %s"),
850 bfd_get_filename (ibfd), new_opt, old_opt);
851 }
852
853 new_flags &= ~ EF_IQ2000_ALL_FLAGS;
854 old_flags &= ~ EF_IQ2000_ALL_FLAGS;
855
856 /* Warn about any other mismatches. */
857 if (new_flags != old_flags)
858 {
859 error = TRUE;
860
861 _bfd_error_handler
862 (_("%s: uses different e_flags (0x%lx) fields than previous modules (0x%lx)"),
863 bfd_get_filename (ibfd), (long)new_flags, (long)old_flags);
864 }
865 }
866
867 if (error)
868 bfd_set_error (bfd_error_bad_value);
869
870 return !error;
871 }
872
873 \f
874 static bfd_boolean
875 iq2000_elf_print_private_bfd_data (bfd *abfd, void * ptr)
876 {
877 FILE *file = (FILE *) ptr;
878 flagword flags;
879
880 BFD_ASSERT (abfd != NULL && ptr != NULL);
881
882 /* Print normal ELF private data. */
883 _bfd_elf_print_private_bfd_data (abfd, ptr);
884
885 flags = elf_elfheader (abfd)->e_flags;
886 fprintf (file, _("private flags = 0x%lx:"), (unsigned long) flags);
887
888 switch (flags & EF_IQ2000_CPU_MASK)
889 {
890 case EF_IQ2000_CPU_IQ10:
891 fprintf (file, " -m10");
892 break;
893 case EF_IQ2000_CPU_IQ2000:
894 fprintf (file, " -m2000");
895 break;
896 default:
897 break;
898 }
899
900 fputc ('\n', file);
901 return TRUE;
902 }
903
904 static
905 bfd_boolean
906 iq2000_elf_object_p (bfd *abfd)
907 {
908 bfd_default_set_arch_mach (abfd, bfd_arch_iq2000,
909 elf32_iq2000_machine (abfd));
910 return TRUE;
911 }
912
913 \f
914 #define ELF_ARCH bfd_arch_iq2000
915 #define ELF_MACHINE_CODE EM_IQ2000
916 #define ELF_MAXPAGESIZE 0x1000
917
918 #define TARGET_BIG_SYM bfd_elf32_iq2000_vec
919 #define TARGET_BIG_NAME "elf32-iq2000"
920
921 #define elf_info_to_howto_rel NULL
922 #define elf_info_to_howto iq2000_info_to_howto_rela
923 #define elf_backend_relocate_section iq2000_elf_relocate_section
924 #define elf_backend_gc_mark_hook iq2000_elf_gc_mark_hook
925 #define elf_backend_check_relocs iq2000_elf_check_relocs
926 #define elf_backend_object_p iq2000_elf_object_p
927 #define elf_backend_rela_normal 1
928
929 #define elf_backend_can_gc_sections 1
930
931 #define bfd_elf32_bfd_reloc_type_lookup iq2000_reloc_type_lookup
932 #define bfd_elf32_bfd_reloc_name_lookup iq2000_reloc_name_lookup
933 #define bfd_elf32_bfd_set_private_flags iq2000_elf_set_private_flags
934 #define bfd_elf32_bfd_copy_private_bfd_data iq2000_elf_copy_private_bfd_data
935 #define bfd_elf32_bfd_merge_private_bfd_data iq2000_elf_merge_private_bfd_data
936 #define bfd_elf32_bfd_print_private_bfd_data iq2000_elf_print_private_bfd_data
937
938 #include "elf32-target.h"
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