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[deliverable/binutils-gdb.git] / bfd / elf32-iq2000.c
1 /* IQ2000-specific support for 32-bit ELF.
2 Copyright (C) 2003-2019 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 #include "libiberty.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 3, /* size (0 = byte, 1 = short, 2 = long) */
39 0, /* bitsize */
40 FALSE, /* pc_relative */
41 0, /* bitpos */
42 complain_overflow_dont, /* 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 bfd_boolean
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 if (r_type >= ARRAY_SIZE (iq2000_elf_howto_table))
440 {
441 /* xgettext:c-format */
442 _bfd_error_handler (_("%pB: unsupported relocation type %#x"),
443 abfd, r_type);
444 bfd_set_error (bfd_error_bad_value);
445 return FALSE;
446 }
447 cache_ptr->howto = & iq2000_elf_howto_table [r_type];
448 break;
449 }
450 return TRUE;
451 }
452
453 /* Look through the relocs for a section during the first phase.
454 Since we don't do .gots or .plts, we just need to consider the
455 virtual table relocs for gc. */
456
457 static bfd_boolean
458 iq2000_elf_check_relocs (bfd *abfd,
459 struct bfd_link_info *info,
460 asection *sec,
461 const Elf_Internal_Rela *relocs)
462 {
463 Elf_Internal_Shdr *symtab_hdr;
464 struct elf_link_hash_entry **sym_hashes;
465 const Elf_Internal_Rela *rel;
466 const Elf_Internal_Rela *rel_end;
467 bfd_boolean changed = FALSE;
468
469 if (bfd_link_relocatable (info))
470 return TRUE;
471
472 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
473 sym_hashes = elf_sym_hashes (abfd);
474
475 rel_end = relocs + sec->reloc_count;
476 for (rel = relocs; rel < rel_end; rel++)
477 {
478 struct elf_link_hash_entry *h;
479 unsigned long r_symndx;
480
481 r_symndx = ELF32_R_SYM (rel->r_info);
482 if (r_symndx < symtab_hdr->sh_info)
483 h = NULL;
484 else
485 {
486 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
487 while (h->root.type == bfd_link_hash_indirect
488 || h->root.type == bfd_link_hash_warning)
489 h = (struct elf_link_hash_entry *) h->root.u.i.link;
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 (_("%pB: 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 (_("%pB: 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"
GDB Binutils - Deliverables
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