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[deliverable/binutils-gdb.git] / bfd / elf32-iq2000.c
1 /* IQ2000-specific support for 32-bit ELF.
2 Copyright (C) 2003-2015 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 3, /* size (0 = byte, 1 = short, 2 = long) */
38 0, /* bitsize */
39 FALSE, /* pc_relative */
40 0, /* bitpos */
41 complain_overflow_dont, /* 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 if (r_type >= (unsigned int) R_IQ2000_max)
439 {
440 _bfd_error_handler (_("%B: invalid IQ2000 reloc number: %d"), abfd, r_type);
441 r_type = 0;
442 }
443 cache_ptr->howto = & iq2000_elf_howto_table [r_type];
444 break;
445 }
446 }
447
448 /* Look through the relocs for a section during the first phase.
449 Since we don't do .gots or .plts, we just need to consider the
450 virtual table relocs for gc. */
451
452 static bfd_boolean
453 iq2000_elf_check_relocs (bfd *abfd,
454 struct bfd_link_info *info,
455 asection *sec,
456 const Elf_Internal_Rela *relocs)
457 {
458 Elf_Internal_Shdr *symtab_hdr;
459 struct elf_link_hash_entry **sym_hashes;
460 const Elf_Internal_Rela *rel;
461 const Elf_Internal_Rela *rel_end;
462 bfd_boolean changed = FALSE;
463
464 if (info->relocatable)
465 return TRUE;
466
467 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
468 sym_hashes = elf_sym_hashes (abfd);
469
470 rel_end = relocs + sec->reloc_count;
471 for (rel = relocs; rel < rel_end; rel++)
472 {
473 struct elf_link_hash_entry *h;
474 unsigned long r_symndx;
475
476 r_symndx = ELF32_R_SYM (rel->r_info);
477 if (r_symndx < symtab_hdr->sh_info)
478 h = NULL;
479 else
480 {
481 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
482 while (h->root.type == bfd_link_hash_indirect
483 || h->root.type == bfd_link_hash_warning)
484 h = (struct elf_link_hash_entry *) h->root.u.i.link;
485
486 /* PR15323, ref flags aren't set for references in the same
487 object. */
488 h->root.non_ir_ref = 1;
489 }
490
491 switch (ELF32_R_TYPE (rel->r_info))
492 {
493 /* This relocation describes the C++ object vtable
494 hierarchy. Reconstruct it for later use during GC. */
495 case R_IQ2000_GNU_VTINHERIT:
496 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
497 return FALSE;
498 break;
499
500 /* This relocation describes which C++ vtable entries
501 are actually used. Record for later use during GC. */
502 case R_IQ2000_GNU_VTENTRY:
503 BFD_ASSERT (h != NULL);
504 if (h != NULL
505 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
506 return FALSE;
507 break;
508
509 case R_IQ2000_32:
510 /* For debug section, change to special harvard-aware relocations. */
511 if (CONST_STRNEQ (sec->name, ".debug")
512 || CONST_STRNEQ (sec->name, ".stab")
513 || CONST_STRNEQ (sec->name, ".eh_frame"))
514 {
515 ((Elf_Internal_Rela *) rel)->r_info
516 = ELF32_R_INFO (ELF32_R_SYM (rel->r_info), R_IQ2000_32_DEBUG);
517 changed = TRUE;
518 }
519 break;
520 }
521 }
522
523 if (changed)
524 /* Note that we've changed relocs, otherwise if !info->keep_memory
525 we'll free the relocs and lose our changes. */
526 elf_section_data (sec)->relocs = (Elf_Internal_Rela *) relocs;
527
528 return TRUE;
529 }
530
531 \f
532 /* Relocate a IQ2000 ELF section.
533 There is some attempt to make this function usable for many architectures,
534 both USE_REL and USE_RELA ['twould be nice if such a critter existed],
535 if only to serve as a learning tool.
536
537 The RELOCATE_SECTION function is called by the new ELF backend linker
538 to handle the relocations for a section.
539
540 The relocs are always passed as Rela structures; if the section
541 actually uses Rel structures, the r_addend field will always be
542 zero.
543
544 This function is responsible for adjusting the section contents as
545 necessary, and (if using Rela relocs and generating a relocatable
546 output file) adjusting the reloc addend as necessary.
547
548 This function does not have to worry about setting the reloc
549 address or the reloc symbol index.
550
551 LOCAL_SYMS is a pointer to the swapped in local symbols.
552
553 LOCAL_SECTIONS is an array giving the section in the input file
554 corresponding to the st_shndx field of each local symbol.
555
556 The global hash table entry for the global symbols can be found
557 via elf_sym_hashes (input_bfd).
558
559 When generating relocatable output, this function must handle
560 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
561 going to be the section symbol corresponding to the output
562 section, which means that the addend must be adjusted
563 accordingly. */
564
565 static bfd_boolean
566 iq2000_elf_relocate_section (bfd * output_bfd ATTRIBUTE_UNUSED,
567 struct bfd_link_info * info,
568 bfd * input_bfd,
569 asection * input_section,
570 bfd_byte * contents,
571 Elf_Internal_Rela * relocs,
572 Elf_Internal_Sym * local_syms,
573 asection ** local_sections)
574 {
575 Elf_Internal_Shdr * symtab_hdr;
576 struct elf_link_hash_entry ** sym_hashes;
577 Elf_Internal_Rela * rel;
578 Elf_Internal_Rela * relend;
579
580 symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr;
581 sym_hashes = elf_sym_hashes (input_bfd);
582 relend = relocs + input_section->reloc_count;
583
584 for (rel = relocs; rel < relend; rel ++)
585 {
586 reloc_howto_type * howto;
587 unsigned long r_symndx;
588 Elf_Internal_Sym * sym;
589 asection * sec;
590 struct elf_link_hash_entry * h;
591 bfd_vma relocation;
592 bfd_reloc_status_type r;
593 const char * name = NULL;
594 int r_type;
595
596 r_type = ELF32_R_TYPE (rel->r_info);
597
598 if ( r_type == R_IQ2000_GNU_VTINHERIT
599 || r_type == R_IQ2000_GNU_VTENTRY)
600 continue;
601
602 r_symndx = ELF32_R_SYM (rel->r_info);
603
604 howto = iq2000_elf_howto_table + ELF32_R_TYPE (rel->r_info);
605 h = NULL;
606 sym = NULL;
607 sec = NULL;
608
609 if (r_symndx < symtab_hdr->sh_info)
610 {
611 asection *osec;
612
613 sym = local_syms + r_symndx;
614 osec = sec = local_sections [r_symndx];
615 if ((sec->flags & SEC_MERGE)
616 && ELF_ST_TYPE (sym->st_info) == STT_SECTION)
617 /* This relocation is relative to a section symbol that is
618 going to be merged. Change it so that it is relative
619 to the merged section symbol. */
620 rel->r_addend = _bfd_elf_rel_local_sym (output_bfd, sym, &sec,
621 rel->r_addend);
622
623 relocation = (sec->output_section->vma
624 + sec->output_offset
625 + sym->st_value);
626
627 name = bfd_elf_string_from_elf_section
628 (input_bfd, symtab_hdr->sh_link, sym->st_name);
629 name = (name == NULL) ? bfd_section_name (input_bfd, osec) : name;
630 }
631 else
632 {
633 bfd_boolean unresolved_reloc;
634 bfd_boolean warned, ignored;
635
636 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
637 r_symndx, symtab_hdr, sym_hashes,
638 h, sec, relocation,
639 unresolved_reloc, warned, ignored);
640
641 name = h->root.root.string;
642 }
643
644 if (sec != NULL && discarded_section (sec))
645 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
646 rel, 1, relend, howto, 0, contents);
647
648 if (info->relocatable)
649 continue;
650
651 switch (r_type)
652 {
653 case R_IQ2000_HI16:
654 r = iq2000_elf_relocate_hi16 (input_bfd, rel, contents, relocation);
655 break;
656
657 case R_IQ2000_OFFSET_16:
658 r = iq2000_elf_relocate_offset16 (input_bfd, rel, contents, relocation,
659 input_section->output_section->vma
660 + input_section->output_offset
661 + rel->r_offset);
662 break;
663
664 case R_IQ2000_PC16:
665 rel->r_addend -= 4;
666 /* Fall through. */
667
668 default:
669 r = iq2000_final_link_relocate (howto, input_bfd, input_section,
670 contents, rel, relocation);
671 break;
672 }
673
674 if (r != bfd_reloc_ok)
675 {
676 const char * msg = (const char *) NULL;
677
678 switch (r)
679 {
680 case bfd_reloc_overflow:
681 r = info->callbacks->reloc_overflow
682 (info, (h ? &h->root : NULL), name, howto->name,
683 (bfd_vma) 0, input_bfd, input_section, rel->r_offset);
684 break;
685
686 case bfd_reloc_undefined:
687 r = info->callbacks->undefined_symbol
688 (info, name, input_bfd, input_section, rel->r_offset, TRUE);
689 break;
690
691 case bfd_reloc_outofrange:
692 msg = _("internal error: out of range error");
693 break;
694
695 case bfd_reloc_notsupported:
696 msg = _("internal error: unsupported relocation error");
697 break;
698
699 case bfd_reloc_dangerous:
700 msg = _("internal error: dangerous relocation");
701 break;
702
703 default:
704 msg = _("internal error: unknown error");
705 break;
706 }
707
708 if (msg)
709 r = info->callbacks->warning
710 (info, msg, name, input_bfd, input_section, rel->r_offset);
711
712 if (! r)
713 return FALSE;
714 }
715 }
716
717 return TRUE;
718 }
719 \f
720
721 /* Return the section that should be marked against GC for a given
722 relocation. */
723
724 static asection *
725 iq2000_elf_gc_mark_hook (asection *sec,
726 struct bfd_link_info *info,
727 Elf_Internal_Rela *rel,
728 struct elf_link_hash_entry *h,
729 Elf_Internal_Sym *sym)
730 {
731 if (h != NULL)
732 switch (ELF32_R_TYPE (rel->r_info))
733 {
734 case R_IQ2000_GNU_VTINHERIT:
735 case R_IQ2000_GNU_VTENTRY:
736 return NULL;
737 }
738
739 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
740 }
741
742 \f
743 /* Return the MACH for an e_flags value. */
744
745 static int
746 elf32_iq2000_machine (bfd *abfd)
747 {
748 switch (elf_elfheader (abfd)->e_flags & EF_IQ2000_CPU_MASK)
749 {
750 case EF_IQ2000_CPU_IQ10:
751 return bfd_mach_iq10;
752
753 case EF_IQ2000_CPU_IQ2000:
754 default:
755 return bfd_mach_iq2000;
756 }
757 }
758
759 \f
760 /* Function to set the ELF flag bits. */
761
762 static bfd_boolean
763 iq2000_elf_set_private_flags (bfd *abfd, flagword flags)
764 {
765 elf_elfheader (abfd)->e_flags = flags;
766 elf_flags_init (abfd) = TRUE;
767 return TRUE;
768 }
769
770 /* Merge backend specific data from an object
771 file to the output object file when linking. */
772
773 static bfd_boolean
774 iq2000_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
775 {
776 flagword old_flags, old_partial;
777 flagword new_flags, new_partial;
778 bfd_boolean error = FALSE;
779 char new_opt[80];
780 char old_opt[80];
781
782 new_opt[0] = old_opt[0] = '\0';
783 new_flags = elf_elfheader (ibfd)->e_flags;
784 old_flags = elf_elfheader (obfd)->e_flags;
785
786 if (!elf_flags_init (obfd))
787 {
788 /* First call, no flags set. */
789 elf_flags_init (obfd) = TRUE;
790 elf_elfheader (obfd)->e_flags = new_flags;
791 }
792
793 else if (new_flags != old_flags)
794 {
795 /* Warn if different cpu is used, but allow a
796 specific cpu to override the generic cpu. */
797 new_partial = (new_flags & EF_IQ2000_CPU_MASK);
798 old_partial = (old_flags & EF_IQ2000_CPU_MASK);
799
800 if (new_partial != old_partial)
801 {
802 switch (new_partial)
803 {
804 case EF_IQ2000_CPU_IQ10:
805 strcat (new_opt, " -m10");
806 break;
807
808 default:
809 case EF_IQ2000_CPU_IQ2000:
810 strcat (new_opt, " -m2000");
811 break;
812 }
813
814 switch (old_partial)
815 {
816 case EF_IQ2000_CPU_IQ10:
817 strcat (old_opt, " -m10");
818 break;
819
820 default:
821 case EF_IQ2000_CPU_IQ2000:
822 strcat (old_opt, " -m2000");
823 break;
824 }
825 }
826
827 /* Print out any mismatches from above. */
828 if (new_opt[0])
829 {
830 error = TRUE;
831 _bfd_error_handler
832 (_("%s: compiled with %s and linked with modules compiled with %s"),
833 bfd_get_filename (ibfd), new_opt, old_opt);
834 }
835
836 new_flags &= ~ EF_IQ2000_ALL_FLAGS;
837 old_flags &= ~ EF_IQ2000_ALL_FLAGS;
838
839 /* Warn about any other mismatches. */
840 if (new_flags != old_flags)
841 {
842 error = TRUE;
843
844 _bfd_error_handler
845 (_("%s: uses different e_flags (0x%lx) fields than previous modules (0x%lx)"),
846 bfd_get_filename (ibfd), (long)new_flags, (long)old_flags);
847 }
848 }
849
850 if (error)
851 bfd_set_error (bfd_error_bad_value);
852
853 return !error;
854 }
855
856 \f
857 static bfd_boolean
858 iq2000_elf_print_private_bfd_data (bfd *abfd, void * ptr)
859 {
860 FILE *file = (FILE *) ptr;
861 flagword flags;
862
863 BFD_ASSERT (abfd != NULL && ptr != NULL);
864
865 /* Print normal ELF private data. */
866 _bfd_elf_print_private_bfd_data (abfd, ptr);
867
868 flags = elf_elfheader (abfd)->e_flags;
869 fprintf (file, _("private flags = 0x%lx:"), (unsigned long) flags);
870
871 switch (flags & EF_IQ2000_CPU_MASK)
872 {
873 case EF_IQ2000_CPU_IQ10:
874 fprintf (file, " -m10");
875 break;
876 case EF_IQ2000_CPU_IQ2000:
877 fprintf (file, " -m2000");
878 break;
879 default:
880 break;
881 }
882
883 fputc ('\n', file);
884 return TRUE;
885 }
886
887 static
888 bfd_boolean
889 iq2000_elf_object_p (bfd *abfd)
890 {
891 bfd_default_set_arch_mach (abfd, bfd_arch_iq2000,
892 elf32_iq2000_machine (abfd));
893 return TRUE;
894 }
895
896 \f
897 #define ELF_ARCH bfd_arch_iq2000
898 #define ELF_MACHINE_CODE EM_IQ2000
899 #define ELF_MAXPAGESIZE 0x1000
900
901 #define TARGET_BIG_SYM iq2000_elf32_vec
902 #define TARGET_BIG_NAME "elf32-iq2000"
903
904 #define elf_info_to_howto_rel NULL
905 #define elf_info_to_howto iq2000_info_to_howto_rela
906 #define elf_backend_relocate_section iq2000_elf_relocate_section
907 #define elf_backend_gc_mark_hook iq2000_elf_gc_mark_hook
908 #define elf_backend_check_relocs iq2000_elf_check_relocs
909 #define elf_backend_object_p iq2000_elf_object_p
910 #define elf_backend_rela_normal 1
911
912 #define elf_backend_can_gc_sections 1
913
914 #define bfd_elf32_bfd_reloc_type_lookup iq2000_reloc_type_lookup
915 #define bfd_elf32_bfd_reloc_name_lookup iq2000_reloc_name_lookup
916 #define bfd_elf32_bfd_set_private_flags iq2000_elf_set_private_flags
917 #define bfd_elf32_bfd_merge_private_bfd_data iq2000_elf_merge_private_bfd_data
918 #define bfd_elf32_bfd_print_private_bfd_data iq2000_elf_print_private_bfd_data
919
920 #include "elf32-target.h"
GDB Binutils - Deliverables
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