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[binutils-gdb.git] / bfd / elf32-iq2000.c
blob0260cc3fc5cf1def33783fcc648de4b006a02d41
1 /* IQ2000-specific support for 32-bit ELF.
2 Copyright (C) 2003-2017 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 /* xgettext:c-format */
441 _bfd_error_handler (_("%B: invalid IQ2000 reloc number: %d"), abfd, r_type);
442 r_type = 0;
443 }
444 cache_ptr->howto = & iq2000_elf_howto_table [r_type];
445 break;
446 }
447 }
448
449 /* Look through the relocs for a section during the first phase.
450 Since we don't do .gots or .plts, we just need to consider the
451 virtual table relocs for gc. */
452
453 static bfd_boolean
454 iq2000_elf_check_relocs (bfd *abfd,
455 struct bfd_link_info *info,
456 asection *sec,
457 const Elf_Internal_Rela *relocs)
458 {
459 Elf_Internal_Shdr *symtab_hdr;
460 struct elf_link_hash_entry **sym_hashes;
461 const Elf_Internal_Rela *rel;
462 const Elf_Internal_Rela *rel_end;
463 bfd_boolean changed = FALSE;
464
465 if (bfd_link_relocatable (info))
466 return TRUE;
467
468 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
469 sym_hashes = elf_sym_hashes (abfd);
470
471 rel_end = relocs + sec->reloc_count;
472 for (rel = relocs; rel < rel_end; rel++)
473 {
474 struct elf_link_hash_entry *h;
475 unsigned long r_symndx;
476
477 r_symndx = ELF32_R_SYM (rel->r_info);
478 if (r_symndx < symtab_hdr->sh_info)
479 h = NULL;
480 else
481 {
482 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
483 while (h->root.type == bfd_link_hash_indirect
484 || h->root.type == bfd_link_hash_warning)
485 h = (struct elf_link_hash_entry *) h->root.u.i.link;
486
487 /* PR15323, ref flags aren't set for references in the same
488 object. */
489 h->root.non_ir_ref_regular = 1;
490 }
491
492 switch (ELF32_R_TYPE (rel->r_info))
493 {
494 /* This relocation describes the C++ object vtable
495 hierarchy. Reconstruct it for later use during GC. */
496 case R_IQ2000_GNU_VTINHERIT:
497 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
498 return FALSE;
499 break;
500
501 /* This relocation describes which C++ vtable entries
502 are actually used. Record for later use during GC. */
503 case R_IQ2000_GNU_VTENTRY:
504 BFD_ASSERT (h != NULL);
505 if (h != NULL
506 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
507 return FALSE;
508 break;
509
510 case R_IQ2000_32:
511 /* For debug section, change to special harvard-aware relocations. */
512 if (CONST_STRNEQ (sec->name, ".debug")
513 || CONST_STRNEQ (sec->name, ".stab")
514 || CONST_STRNEQ (sec->name, ".eh_frame"))
515 {
516 ((Elf_Internal_Rela *) rel)->r_info
517 = ELF32_R_INFO (ELF32_R_SYM (rel->r_info), R_IQ2000_32_DEBUG);
518 changed = TRUE;
519 }
520 break;
521 }
522 }
523
524 if (changed)
525 /* Note that we've changed relocs, otherwise if !info->keep_memory
526 we'll free the relocs and lose our changes. */
527 elf_section_data (sec)->relocs = (Elf_Internal_Rela *) relocs;
528
529 return TRUE;
530 }
531
532 \f
533 /* Relocate a IQ2000 ELF section.
534 There is some attempt to make this function usable for many architectures,
535 both USE_REL and USE_RELA ['twould be nice if such a critter existed],
536 if only to serve as a learning tool.
537
538 The RELOCATE_SECTION function is called by the new ELF backend linker
539 to handle the relocations for a section.
540
541 The relocs are always passed as Rela structures; if the section
542 actually uses Rel structures, the r_addend field will always be
543 zero.
544
545 This function is responsible for adjusting the section contents as
546 necessary, and (if using Rela relocs and generating a relocatable
547 output file) adjusting the reloc addend as necessary.
548
549 This function does not have to worry about setting the reloc
550 address or the reloc symbol index.
551
552 LOCAL_SYMS is a pointer to the swapped in local symbols.
553
554 LOCAL_SECTIONS is an array giving the section in the input file
555 corresponding to the st_shndx field of each local symbol.
556
557 The global hash table entry for the global symbols can be found
558 via elf_sym_hashes (input_bfd).
559
560 When generating relocatable output, this function must handle
561 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
562 going to be the section symbol corresponding to the output
563 section, which means that the addend must be adjusted
564 accordingly. */
565
566 static bfd_boolean
567 iq2000_elf_relocate_section (bfd * output_bfd ATTRIBUTE_UNUSED,
568 struct bfd_link_info * info,
569 bfd * input_bfd,
570 asection * input_section,
571 bfd_byte * contents,
572 Elf_Internal_Rela * relocs,
573 Elf_Internal_Sym * local_syms,
574 asection ** local_sections)
575 {
576 Elf_Internal_Shdr * symtab_hdr;
577 struct elf_link_hash_entry ** sym_hashes;
578 Elf_Internal_Rela * rel;
579 Elf_Internal_Rela * relend;
580
581 symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr;
582 sym_hashes = elf_sym_hashes (input_bfd);
583 relend = relocs + input_section->reloc_count;
584
585 for (rel = relocs; rel < relend; rel ++)
586 {
587 reloc_howto_type * howto;
588 unsigned long r_symndx;
589 Elf_Internal_Sym * sym;
590 asection * sec;
591 struct elf_link_hash_entry * h;
592 bfd_vma relocation;
593 bfd_reloc_status_type r;
594 const char * name = NULL;
595 int r_type;
596
597 r_type = ELF32_R_TYPE (rel->r_info);
598
599 if ( r_type == R_IQ2000_GNU_VTINHERIT
600 || r_type == R_IQ2000_GNU_VTENTRY)
601 continue;
602
603 r_symndx = ELF32_R_SYM (rel->r_info);
604
605 howto = iq2000_elf_howto_table + ELF32_R_TYPE (rel->r_info);
606 h = NULL;
607 sym = NULL;
608 sec = NULL;
609
610 if (r_symndx < symtab_hdr->sh_info)
611 {
612 asection *osec;
613
614 sym = local_syms + r_symndx;
615 osec = sec = local_sections [r_symndx];
616 if ((sec->flags & SEC_MERGE)
617 && ELF_ST_TYPE (sym->st_info) == STT_SECTION)
618 /* This relocation is relative to a section symbol that is
619 going to be merged. Change it so that it is relative
620 to the merged section symbol. */
621 rel->r_addend = _bfd_elf_rel_local_sym (output_bfd, sym, &sec,
622 rel->r_addend);
623
624 relocation = (sec->output_section->vma
625 + sec->output_offset
626 + sym->st_value);
627
628 name = bfd_elf_string_from_elf_section
629 (input_bfd, symtab_hdr->sh_link, sym->st_name);
630 name = (name == NULL) ? bfd_section_name (input_bfd, osec) : name;
631 }
632 else
633 {
634 bfd_boolean unresolved_reloc;
635 bfd_boolean warned, ignored;
636
637 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
638 r_symndx, symtab_hdr, sym_hashes,
639 h, sec, relocation,
640 unresolved_reloc, warned, ignored);
641
642 name = h->root.root.string;
643 }
644
645 if (sec != NULL && discarded_section (sec))
646 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
647 rel, 1, relend, howto, 0, contents);
648
649 if (bfd_link_relocatable (info))
650 continue;
651
652 switch (r_type)
653 {
654 case R_IQ2000_HI16:
655 r = iq2000_elf_relocate_hi16 (input_bfd, rel, contents, relocation);
656 break;
657
658 case R_IQ2000_OFFSET_16:
659 r = iq2000_elf_relocate_offset16 (input_bfd, rel, contents, relocation,
660 input_section->output_section->vma
661 + input_section->output_offset
662 + rel->r_offset);
663 break;
664
665 case R_IQ2000_PC16:
666 rel->r_addend -= 4;
667 /* Fall through. */
668
669 default:
670 r = iq2000_final_link_relocate (howto, input_bfd, input_section,
671 contents, rel, relocation);
672 break;
673 }
674
675 if (r != bfd_reloc_ok)
676 {
677 const char * msg = (const char *) NULL;
678
679 switch (r)
680 {
681 case bfd_reloc_overflow:
682 (*info->callbacks->reloc_overflow)
683 (info, (h ? &h->root : NULL), name, howto->name,
684 (bfd_vma) 0, input_bfd, input_section, rel->r_offset);
685 break;
686
687 case bfd_reloc_undefined:
688 (*info->callbacks->undefined_symbol)
689 (info, name, input_bfd, input_section, rel->r_offset, TRUE);
690 break;
691
692 case bfd_reloc_outofrange:
693 msg = _("internal error: out of range error");
694 break;
695
696 case bfd_reloc_notsupported:
697 msg = _("internal error: unsupported relocation error");
698 break;
699
700 case bfd_reloc_dangerous:
701 msg = _("internal error: dangerous relocation");
702 break;
703
704 default:
705 msg = _("internal error: unknown error");
706 break;
707 }
708
709 if (msg)
710 (*info->callbacks->warning) (info, msg, name, input_bfd,
711 input_section, rel->r_offset);
712 }
713 }
714
715 return TRUE;
716 }
717 \f
718
719 /* Return the section that should be marked against GC for a given
720 relocation. */
721
722 static asection *
723 iq2000_elf_gc_mark_hook (asection *sec,
724 struct bfd_link_info *info,
725 Elf_Internal_Rela *rel,
726 struct elf_link_hash_entry *h,
727 Elf_Internal_Sym *sym)
728 {
729 if (h != NULL)
730 switch (ELF32_R_TYPE (rel->r_info))
731 {
732 case R_IQ2000_GNU_VTINHERIT:
733 case R_IQ2000_GNU_VTENTRY:
734 return NULL;
735 }
736
737 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
738 }
739
740 \f
741 /* Return the MACH for an e_flags value. */
742
743 static int
744 elf32_iq2000_machine (bfd *abfd)
745 {
746 switch (elf_elfheader (abfd)->e_flags & EF_IQ2000_CPU_MASK)
747 {
748 case EF_IQ2000_CPU_IQ10:
749 return bfd_mach_iq10;
750
751 case EF_IQ2000_CPU_IQ2000:
752 default:
753 return bfd_mach_iq2000;
754 }
755 }
756
757 \f
758 /* Function to set the ELF flag bits. */
759
760 static bfd_boolean
761 iq2000_elf_set_private_flags (bfd *abfd, flagword flags)
762 {
763 elf_elfheader (abfd)->e_flags = flags;
764 elf_flags_init (abfd) = TRUE;
765 return TRUE;
766 }
767
768 /* Merge backend specific data from an object
769 file to the output object file when linking. */
770
771 static bfd_boolean
772 iq2000_elf_merge_private_bfd_data (bfd *ibfd, struct bfd_link_info *info)
773 {
774 bfd *obfd = info->output_bfd;
775 flagword old_flags, old_partial;
776 flagword new_flags, new_partial;
777 bfd_boolean error = FALSE;
778 char new_opt[80];
779 char old_opt[80];
780
781 new_opt[0] = old_opt[0] = '\0';
782 new_flags = elf_elfheader (ibfd)->e_flags;
783 old_flags = elf_elfheader (obfd)->e_flags;
784
785 if (!elf_flags_init (obfd))
786 {
787 /* First call, no flags set. */
788 elf_flags_init (obfd) = TRUE;
789 elf_elfheader (obfd)->e_flags = new_flags;
790 }
791
792 else if (new_flags != old_flags)
793 {
794 /* Warn if different cpu is used, but allow a
795 specific cpu to override the generic cpu. */
796 new_partial = (new_flags & EF_IQ2000_CPU_MASK);
797 old_partial = (old_flags & EF_IQ2000_CPU_MASK);
798
799 if (new_partial != old_partial)
800 {
801 switch (new_partial)
802 {
803 case EF_IQ2000_CPU_IQ10:
804 strcat (new_opt, " -m10");
805 break;
806
807 default:
808 case EF_IQ2000_CPU_IQ2000:
809 strcat (new_opt, " -m2000");
810 break;
811 }
812
813 switch (old_partial)
814 {
815 case EF_IQ2000_CPU_IQ10:
816 strcat (old_opt, " -m10");
817 break;
818
819 default:
820 case EF_IQ2000_CPU_IQ2000:
821 strcat (old_opt, " -m2000");
822 break;
823 }
824 }
825
826 /* Print out any mismatches from above. */
827 if (new_opt[0])
828 {
829 error = TRUE;
830 _bfd_error_handler
831 /* xgettext:c-format */
832 (_("%B: compiled with %s and linked with modules compiled with %s"),
833 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 /* xgettext:c-format */
846 (_("%B: uses different e_flags (%#x) fields than previous modules (%#x)"),
847 ibfd, new_flags, old_flags);
848 }
849 }
850
851 if (error)
852 bfd_set_error (bfd_error_bad_value);
853
854 return !error;
855 }
856
857 \f
858 static bfd_boolean
859 iq2000_elf_print_private_bfd_data (bfd *abfd, void * ptr)
860 {
861 FILE *file = (FILE *) ptr;
862 flagword flags;
863
864 BFD_ASSERT (abfd != NULL && ptr != NULL);
865
866 /* Print normal ELF private data. */
867 _bfd_elf_print_private_bfd_data (abfd, ptr);
868
869 flags = elf_elfheader (abfd)->e_flags;
870 fprintf (file, _("private flags = 0x%lx:"), (unsigned long) flags);
871
872 switch (flags & EF_IQ2000_CPU_MASK)
873 {
874 case EF_IQ2000_CPU_IQ10:
875 fprintf (file, " -m10");
876 break;
877 case EF_IQ2000_CPU_IQ2000:
878 fprintf (file, " -m2000");
879 break;
880 default:
881 break;
882 }
883
884 fputc ('\n', file);
885 return TRUE;
886 }
887
888 static
889 bfd_boolean
890 iq2000_elf_object_p (bfd *abfd)
891 {
892 bfd_default_set_arch_mach (abfd, bfd_arch_iq2000,
893 elf32_iq2000_machine (abfd));
894 return TRUE;
895 }
896
897 \f
898 #define ELF_ARCH bfd_arch_iq2000
899 #define ELF_MACHINE_CODE EM_IQ2000
900 #define ELF_MAXPAGESIZE 0x1000
901
902 #define TARGET_BIG_SYM iq2000_elf32_vec
903 #define TARGET_BIG_NAME "elf32-iq2000"
904
905 #define elf_info_to_howto_rel NULL
906 #define elf_info_to_howto iq2000_info_to_howto_rela
907 #define elf_backend_relocate_section iq2000_elf_relocate_section
908 #define elf_backend_gc_mark_hook iq2000_elf_gc_mark_hook
909 #define elf_backend_check_relocs iq2000_elf_check_relocs
910 #define elf_backend_object_p iq2000_elf_object_p
911 #define elf_backend_rela_normal 1
912
913 #define elf_backend_can_gc_sections 1
914
915 #define bfd_elf32_bfd_reloc_type_lookup iq2000_reloc_type_lookup
916 #define bfd_elf32_bfd_reloc_name_lookup iq2000_reloc_name_lookup
917 #define bfd_elf32_bfd_set_private_flags iq2000_elf_set_private_flags
918 #define bfd_elf32_bfd_merge_private_bfd_data iq2000_elf_merge_private_bfd_data
919 #define bfd_elf32_bfd_print_private_bfd_data iq2000_elf_print_private_bfd_data
920
921 #include "elf32-target.h"
The GNU Binutils are a collection of binary tools.