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* config/tc-sh.c: Remove trailing whitespace.
[deliverable/binutils-gdb.git] / bfd / elf32-iq2000.c
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a75473eb
SC		 1/* IQ2000-specific support for 32-bit ELF.
2 Copyright (C) 2003 Free Software Foundation, Inc.
3
4This file is part of BFD, the Binary File Descriptor library.
5
6This program is free software; you can redistribute it and/or modify
7it under the terms of the GNU General Public License as published by
8the Free Software Foundation; either version 2 of the License, or
9(at your option) any later version.
10
11This program is distributed in the hope that it will be useful,
12but WITHOUT ANY WARRANTY; without even the implied warranty of
13MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14GNU General Public License for more details.
15
16You should have received a copy of the GNU General Public License
17along with this program; if not, write to the Free Software
18Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
19
20#include "bfd.h"
21#include "sysdep.h"
22#include "libbfd.h"
23#include "elf-bfd.h"
24#include "elf/iq2000.h"
25
26/* Forward declarations. */
27
28/* Private relocation functions. */
29static bfd_reloc_status_type iq2000_elf_relocate_hi16 PARAMS ((bfd *, Elf_Internal_Rela *, bfd_byte *, bfd_vma));
30static reloc_howto_type * iq2000_reloc_type_lookup PARAMS ((bfd *, bfd_reloc_code_real_type));
31static void iq2000_info_to_howto_rela PARAMS ((bfd *, arelent *, Elf_Internal_Rela *));
32static bfd_boolean iq2000_elf_relocate_section PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *, Elf_Internal_Rela *, Elf_Internal_Sym *, asection **));
33static bfd_reloc_status_type iq2000_final_link_relocate PARAMS ((reloc_howto_type *, bfd *, asection *, bfd_byte *, Elf_Internal_Rela *, bfd_vma));
34static bfd_boolean iq2000_elf_gc_sweep_hook PARAMS ((bfd *, struct bfd_link_info *, asection *, const Elf_Internal_Rela *));
35static asection * iq2000_elf_gc_mark_hook PARAMS ((asection *sec, struct bfd_link_info *, Elf_Internal_Rela *, struct elf_link_hash_entry *, Elf_Internal_Sym *));
36static reloc_howto_type * iq2000_reloc_type_lookup PARAMS ((bfd *, bfd_reloc_code_real_type));
37static int elf32_iq2000_machine PARAMS ((bfd *));
38static bfd_boolean iq2000_elf_object_p PARAMS ((bfd *));
39static bfd_boolean iq2000_elf_set_private_flags PARAMS ((bfd *, flagword));
40static bfd_boolean iq2000_elf_copy_private_bfd_data PARAMS ((bfd *, bfd *));
41static bfd_boolean iq2000_elf_merge_private_bfd_data PARAMS ((bfd *, bfd *));
42static bfd_boolean iq2000_elf_print_private_bfd_data PARAMS ((bfd *, PTR));
43static bfd_boolean iq2000_elf_check_relocs PARAMS ((bfd *, struct bfd_link_info *, asection *, const Elf_Internal_Rela *));
44static bfd_reloc_status_type iq2000_elf_howto_hi16_reloc PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
45
46\f
47static reloc_howto_type iq2000_elf_howto_table [] =
48{
49 /* This reloc does nothing. */
50
51 HOWTO (R_IQ2000_NONE, /* type */
52 0, /* rightshift */
53 2, /* size (0 = byte, 1 = short, 2 = long) */
54 32, /* 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_NONE", /* name */
60 FALSE, /* partial_inplace */
61 0, /* src_mask */
62 0, /* dst_mask */
63 FALSE), /* pcrel_offset */
64
65 /* A 16 bit absolute relocation. */
66 HOWTO (R_IQ2000_16, /* type */
67 0, /* rightshift */
68 1, /* size (0 = byte, 1 = short, 2 = long) */
69 16, /* 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_16", /* name */
75 FALSE, /* partial_inplace */
76 0x0000, /* src_mask */
77 0xffff, /* dst_mask */
78 FALSE), /* pcrel_offset */
79
80 /* A 32 bit absolute relocation. */
81 HOWTO (R_IQ2000_32, /* type */
82 0, /* rightshift */
83 2, /* size (0 = byte, 1 = short, 2 = long) */
84 31, /* bitsize */
85 FALSE, /* pc_relative */
86 0, /* bitpos */
87 complain_overflow_bitfield, /* complain_on_overflow */
88 bfd_elf_generic_reloc, /* special_function */
89 "R_IQ2000_32", /* name */
90 FALSE, /* partial_inplace */
91 0x00000000, /* src_mask */
92 0x7fffffff, /* dst_mask */
93 FALSE), /* pcrel_offset */
94
95 /* 26 bit branch address. */
96 HOWTO (R_IQ2000_26, /* type */
97 2, /* rightshift */
98 2, /* size (0 = byte, 1 = short, 2 = long) */
99 26, /* bitsize */
100 FALSE, /* pc_relative */
101 0, /* bitpos */
102 complain_overflow_dont, /* complain_on_overflow */
103 /* This needs complex overflow
104 detection, because the upper four
105 bits must match the PC. */
106 bfd_elf_generic_reloc, /* special_function */
107 "R_IQ2000_26", /* name */
108 FALSE, /* partial_inplace */
109 0x00000000, /* src_mask */
110 0x03ffffff, /* dst_mask */
111 FALSE), /* pcrel_offset */
112
113 /* 16 bit PC relative reference. */
114 HOWTO (R_IQ2000_PC16, /* type */
115 2, /* rightshift */
116 2, /* size (0 = byte, 1 = short, 2 = long) */
117 16, /* bitsize */
118 TRUE, /* pc_relative */
119 0, /* bitpos */
120 complain_overflow_signed, /* complain_on_overflow */
121 bfd_elf_generic_reloc, /* special_function */
122 "R_IQ2000_PC16", /* name */
123 FALSE, /* partial_inplace */
124 0x0000, /* src_mask */
125 0xffff, /* dst_mask */
126 TRUE), /* pcrel_offset */
127
128 /* high 16 bits of symbol value. */
129 HOWTO (R_IQ2000_HI16, /* type */
130 16, /* rightshift */
131 2, /* size (0 = byte, 1 = short, 2 = long) */
132 15, /* bitsize */
133 FALSE, /* pc_relative */
134 0, /* bitpos */
135 complain_overflow_dont, /* complain_on_overflow */
136 iq2000_elf_howto_hi16_reloc, /* special_function */
137 "R_IQ2000_HI16", /* name */
138 FALSE, /* partial_inplace */
139 0x0000, /* src_mask */
140 0x7fff, /* dst_mask */
141 FALSE), /* pcrel_offset */
142
143 /* Low 16 bits of symbol value. */
144 HOWTO (R_IQ2000_LO16, /* type */
145 0, /* 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_LO16", /* name */
153 FALSE, /* partial_inplace */
154 0x0000, /* src_mask */
155 0xffff, /* dst_mask */
156 FALSE), /* pcrel_offset */
157
158 /* 16-bit jump offset. */
159 HOWTO (R_IQ2000_OFFSET_16, /* type */
160 2, /* rightshift */
161 2, /* size (0 = byte, 1 = short, 2 = long) */
162 16, /* 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_16", /* name */
168 FALSE, /* partial_inplace */
169 0x0000, /* src_mask */
170 0xffff, /* dst_mask */
171 FALSE), /* pcrel_offset */
172
173 /* 21-bit jump offset. */
174 HOWTO (R_IQ2000_OFFSET_21, /* type */
175 2, /* rightshift */
176 2, /* size (0 = byte, 1 = short, 2 = long) */
177 21, /* 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_OFFSET_21", /* name */
183 FALSE, /* partial_inplace */
184 0x000000, /* src_mask */
185 0x1fffff, /* dst_mask */
186 FALSE), /* pcrel_offset */
187
188 /* unsigned high 16 bits of value. */
189 HOWTO (R_IQ2000_OFFSET_21, /* type */
190 16, /* rightshift */
191 2, /* size (0 = byte, 1 = short, 2 = long) */
192 16, /* bitsize */
193 FALSE, /* pc_relative */
194 0, /* bitpos */
195 complain_overflow_dont, /* complain_on_overflow */
196 bfd_elf_generic_reloc, /* special_function */
197 "R_IQ2000_UHI16", /* name */
198 FALSE, /* partial_inplace */
199 0x0000, /* src_mask */
200 0x7fff, /* dst_mask */
201 FALSE), /* pcrel_offset */
202
203 /* A 32 bit absolute debug relocation. */
204 HOWTO (R_IQ2000_32_DEBUG, /* type */
205 0, /* rightshift */
206 2, /* size (0 = byte, 1 = short, 2 = long) */
207 32, /* bitsize */
208 FALSE, /* pc_relative */
209 0, /* bitpos */
210 complain_overflow_bitfield, /* complain_on_overflow */
211 bfd_elf_generic_reloc, /* special_function */
212 "R_IQ2000_32", /* name */
213 FALSE, /* partial_inplace */
214 0x00000000, /* src_mask */
215 0xffffffff, /* dst_mask */
216 FALSE), /* pcrel_offset */
217
218};
219
220/* GNU extension to record C++ vtable hierarchy. */
221static reloc_howto_type iq2000_elf_vtinherit_howto =
222 HOWTO (R_IQ2000_GNU_VTINHERIT, /* 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_VTINHERIT", /* name */
231 FALSE, /* partial_inplace */
232 0, /* src_mask */
233 0, /* dst_mask */
234 FALSE); /* pcrel_offset */
235
236/* GNU extension to record C++ vtable member usage. */
237static reloc_howto_type iq2000_elf_vtentry_howto =
238 HOWTO (R_IQ2000_GNU_VTENTRY, /* type */
239 0, /* rightshift */
240 2, /* size (0 = byte, 1 = short, 2 = long) */
241 0, /* bitsize */
242 FALSE, /* pc_relative */
243 0, /* bitpos */
244 complain_overflow_dont, /* complain_on_overflow */
245 NULL, /* special_function */
246 "R_IQ2000_GNU_VTENTRY", /* name */
247 FALSE, /* partial_inplace */
248 0, /* src_mask */
249 0, /* dst_mask */
250 FALSE); /* pcrel_offset */
251
252\f
253/* Map BFD reloc types to IQ2000 ELF reloc types. */
254
255struct iq2000_reloc_map
256{
257 bfd_reloc_code_real_type bfd_reloc_val;
258 unsigned int iq2000_reloc_val;
259};
260
261static const struct iq2000_reloc_map iq2000_reloc_map [] =
262{
263 { BFD_RELOC_NONE, R_IQ2000_NONE },
264 { BFD_RELOC_16, R_IQ2000_16 },
265 { BFD_RELOC_32, R_IQ2000_32 },
266 { BFD_RELOC_MIPS_JMP, R_IQ2000_26 },
267 { BFD_RELOC_16_PCREL_S2, R_IQ2000_PC16 },
268 { BFD_RELOC_HI16, R_IQ2000_HI16 },
269 { BFD_RELOC_LO16, R_IQ2000_LO16 },
270 { BFD_RELOC_IQ2000_OFFSET_16,R_IQ2000_OFFSET_16 },
271 { BFD_RELOC_IQ2000_OFFSET_21,R_IQ2000_OFFSET_21 },
272 { BFD_RELOC_IQ2000_UHI16, R_IQ2000_UHI16 },
273 { BFD_RELOC_VTABLE_INHERIT, R_IQ2000_GNU_VTINHERIT },
274 { BFD_RELOC_VTABLE_ENTRY, R_IQ2000_GNU_VTENTRY },
275};
276
277static bfd_reloc_status_type
278iq2000_elf_howto_hi16_reloc (abfd,
279 reloc_entry,
280 symbol,
281 data,
282 input_section,
283 output_bfd,
284 error_message)
285 bfd *abfd ATTRIBUTE_UNUSED;
286 arelent *reloc_entry;
287 asymbol *symbol;
288 PTR data;
289 asection *input_section;
290 bfd *output_bfd;
291 char **error_message ATTRIBUTE_UNUSED;
292{
293 bfd_reloc_status_type ret;
294 bfd_vma relocation;
295
296 /* If we're relocating, and this an external symbol, we don't want
297 to change anything. */
298 if (output_bfd != (bfd *) NULL
299 && (symbol->flags & BSF_SECTION_SYM) == 0
300 && reloc_entry->addend == 0)
301 {
302 reloc_entry->address += input_section->output_offset;
303 return bfd_reloc_ok;
304 }
305
306 if (bfd_is_com_section (symbol->section))
307 relocation = 0;
308 else
309 relocation = symbol->value;
310
311 relocation += symbol->section->output_section->vma;
312 relocation += symbol->section->output_offset;
313 relocation += reloc_entry->addend;
314
315 /* if %lo will have sign-extension, compensate by add 0x10000 to hi portion */
316 if (relocation & 0x8000)
317 reloc_entry->addend += 0x10000;
318
319 /* Now do the reloc in the usual way. */
320 ret = bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
321 input_section, output_bfd, error_message);
322
323 /* put it back the way it was */
324 if (relocation & 0x8000)
325 reloc_entry->addend -= 0x10000;
326
327 return ret;
328}
329
330static bfd_reloc_status_type
331iq2000_elf_relocate_hi16 (input_bfd, relhi, contents, value)
332 bfd *input_bfd;
333 Elf_Internal_Rela *relhi;
334 bfd_byte *contents;
335 bfd_vma value;
336{
337 bfd_vma insn;
338
339 insn = bfd_get_32 (input_bfd, contents + relhi->r_offset);
340
341 value += relhi->r_addend;
342 value &= 0x7fffffff; /* mask off top-bit which is Harvard mask bit */
343
344 /* if top-bit of %lo value is on, this means that %lo will
345 sign-propagate and so we compensate by adding 1 to %hi value */
346 if (value & 0x8000)
347 value += 0x10000;
348
349 value >>= 16;
350 insn = ((insn & ~0xFFFF) | value);
351
352 bfd_put_32 (input_bfd, insn, contents + relhi->r_offset);
353 return bfd_reloc_ok;
354}
355
356static reloc_howto_type *
357iq2000_reloc_type_lookup (abfd, code)
358 bfd * abfd ATTRIBUTE_UNUSED;
359 bfd_reloc_code_real_type code;
360{
361 /* Note that the iq2000_elf_howto_table is indxed by the R_
362 constants. Thus, the order that the howto records appear in the
363 table *must* match the order of the relocation types defined in
364 include/elf/iq2000.h. */
365
366 switch (code)
367 {
368 case BFD_RELOC_NONE:
369 return &iq2000_elf_howto_table[ (int) R_IQ2000_NONE];
370 case BFD_RELOC_16:
371 return &iq2000_elf_howto_table[ (int) R_IQ2000_16];
372 case BFD_RELOC_32:
373 return &iq2000_elf_howto_table[ (int) R_IQ2000_32];
374 case BFD_RELOC_MIPS_JMP:
375 return &iq2000_elf_howto_table[ (int) R_IQ2000_26];
376 case BFD_RELOC_IQ2000_OFFSET_16:
377 return &iq2000_elf_howto_table[ (int) R_IQ2000_OFFSET_16];
378 case BFD_RELOC_IQ2000_OFFSET_21:
379 return &iq2000_elf_howto_table[ (int) R_IQ2000_OFFSET_21];
380 case BFD_RELOC_16_PCREL_S2:
381 return &iq2000_elf_howto_table[ (int) R_IQ2000_PC16];
382 case BFD_RELOC_HI16:
383 return &iq2000_elf_howto_table[ (int) R_IQ2000_HI16];
384 case BFD_RELOC_IQ2000_UHI16:
385 return &iq2000_elf_howto_table[ (int) R_IQ2000_UHI16];
386 case BFD_RELOC_LO16:
387 return &iq2000_elf_howto_table[ (int) R_IQ2000_LO16];
388 case BFD_RELOC_VTABLE_INHERIT:
389 return &iq2000_elf_vtinherit_howto;
390 case BFD_RELOC_VTABLE_ENTRY:
391 return &iq2000_elf_vtentry_howto;
392 default:
393 /* Pacify gcc -Wall. */
394 return NULL;
395 }
396 return NULL;
397}
398
399\f
400/* Perform a single relocation. By default we use the standard BFD
401 routines. */
402
403static bfd_reloc_status_type
404iq2000_final_link_relocate (howto, input_bfd, input_section, contents, rel, relocation)
405 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
419static void
420iq2000_info_to_howto_rela (abfd, cache_ptr, dst)
421 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
448static bfd_boolean
449iq2000_elf_check_relocs (abfd, info, sec, relocs)
450 bfd *abfd;
451 struct bfd_link_info *info;
452 asection *sec;
453 const Elf_Internal_Rela *relocs;
454{
455 Elf_Internal_Shdr *symtab_hdr;
456 struct elf_link_hash_entry **sym_hashes, **sym_hashes_end;
60d8b524
AM		 457 const Elf_Internal_Rela *rel;
458 const Elf_Internal_Rela *rel_end;
459 bfd_boolean changed = FALSE;
a75473eb 460
1049f94e 461 if (info->relocatable)
a75473eb
SC		 462 return TRUE;
463
464 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
465 sym_hashes = elf_sym_hashes (abfd);
466 sym_hashes_end = sym_hashes + symtab_hdr->sh_size/sizeof(Elf32_External_Sym);
467 if (!elf_bad_symtab (abfd))
468 sym_hashes_end -= symtab_hdr->sh_info;
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 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
481
482 switch (ELF32_R_TYPE (rel->r_info))
483 {
484 /* This relocation describes the C++ object vtable hierarchy.
485 Reconstruct it for later use during GC. */
486 case R_IQ2000_GNU_VTINHERIT:
487 if (!_bfd_elf32_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
488 return FALSE;
489 break;
490
491 /* This relocation describes which C++ vtable entries are actually
492 used. Record for later use during GC. */
493 case R_IQ2000_GNU_VTENTRY:
494 if (!_bfd_elf32_gc_record_vtentry (abfd, sec, h, rel->r_addend))
495 return FALSE;
496 break;
497
498 case R_IQ2000_32:
499 /* For debug section, change to special harvard-aware relocations */
500 if (memcmp (sec->name, ".debug", 6) == 0
501 || memcmp (sec->name, ".stab", 5) == 0
502 || memcmp (sec->name, ".eh_frame", 9) == 0)
60d8b524
AM		 503 {
504 ((Elf_Internal_Rela *) rel)->r_info
505 = ELF32_R_INFO (ELF32_R_SYM (rel->r_info), R_IQ2000_32_DEBUG);
506 changed = TRUE;
507 }
a75473eb
SC		 508 break;
509 }
510 }
60d8b524
AM		 511
512 if (changed)
513 /* Note that we've changed relocs, otherwise if !info->keep_memory
514 we'll free the relocs and lose our changes. */
515 (const Elf_Internal_Rela *) (elf_section_data (sec)->relocs) = relocs;
516
a75473eb
SC		 517 return TRUE;
518}
519
520\f
521/* Relocate a IQ2000 ELF section.
522 There is some attempt to make this function usable for many architectures,
523 both USE_REL and USE_RELA ['twould be nice if such a critter existed],
524 if only to serve as a learning tool.
525
526 The RELOCATE_SECTION function is called by the new ELF backend linker
527 to handle the relocations for a section.
528
529 The relocs are always passed as Rela structures; if the section
530 actually uses Rel structures, the r_addend field will always be
531 zero.
532
533 This function is responsible for adjusting the section contents as
1049f94e 534 necessary, and (if using Rela relocs and generating a relocatable
a75473eb
SC		 535 output file) adjusting the reloc addend as necessary.
536
537 This function does not have to worry about setting the reloc
538 address or the reloc symbol index.
539
540 LOCAL_SYMS is a pointer to the swapped in local symbols.
541
542 LOCAL_SECTIONS is an array giving the section in the input file
543 corresponding to the st_shndx field of each local symbol.
544
545 The global hash table entry for the global symbols can be found
546 via elf_sym_hashes (input_bfd).
547
1049f94e 548 When generating relocatable output, this function must handle
a75473eb
SC		 549 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
550 going to be the section symbol corresponding to the output
551 section, which means that the addend must be adjusted
552 accordingly. */
553
554static bfd_boolean
555iq2000_elf_relocate_section (output_bfd, info, input_bfd, input_section,
556 contents, relocs, local_syms, local_sections)
557 bfd * output_bfd ATTRIBUTE_UNUSED;
558 struct bfd_link_info * info;
559 bfd * input_bfd;
560 asection * input_section;
561 bfd_byte * contents;
562 Elf_Internal_Rela * relocs;
563 Elf_Internal_Sym * local_syms;
564 asection ** local_sections;
565{
566 Elf_Internal_Shdr * symtab_hdr;
567 struct elf_link_hash_entry ** sym_hashes;
568 Elf_Internal_Rela * rel;
569 Elf_Internal_Rela * relend;
570
571 symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr;
572 sym_hashes = elf_sym_hashes (input_bfd);
573 relend = relocs + input_section->reloc_count;
574
575 for (rel = relocs; rel < relend; rel ++)
576 {
577 reloc_howto_type * howto;
578 unsigned long r_symndx;
579 Elf_Internal_Sym * sym;
580 asection * sec;
581 struct elf_link_hash_entry * h;
582 bfd_vma relocation;
583 bfd_reloc_status_type r;
584 const char * name = NULL;
585 int r_type;
586
587 r_type = ELF32_R_TYPE (rel->r_info);
588
589 if ( r_type == R_IQ2000_GNU_VTINHERIT
590 || r_type == R_IQ2000_GNU_VTENTRY)
591 continue;
592
593 r_symndx = ELF32_R_SYM (rel->r_info);
594
595 /* This is a final link. */
596 howto = iq2000_elf_howto_table + ELF32_R_TYPE (rel->r_info);
597 h = NULL;
598 sym = NULL;
599 sec = NULL;
600
601 if (r_symndx < symtab_hdr->sh_info)
602 {
603 sym = local_syms + r_symndx;
604 sec = local_sections [r_symndx];
605 relocation = (sec->output_section->vma
606 + sec->output_offset
607 + sym->st_value);
608
609 name = bfd_elf_string_from_elf_section
610 (input_bfd, symtab_hdr->sh_link, sym->st_name);
611 name = (name == NULL) ? bfd_section_name (input_bfd, sec) : name;
612#ifdef DEBUG
613 fprintf (stderr, "local: sec: %s, sym: %s (%d), value: %x + %x + %x addend %x\n",
614 sec->name, name, sym->st_name,
615 sec->output_section->vma, sec->output_offset,
616 sym->st_value, rel->r_addend);
617#endif
618 }
619 else
620 {
560e09e9
NC		 621 bfd_boolean unresolved_reloc;
622 bfd_boolean warned;
623
624 RELOC_FOR_GLOBAL_SYMBOL (h, sym_hashes, r_symndx,
625 symtab_hdr, relocation,
626 sec, unresolved_reloc, info, warned);
a75473eb
SC		 627
628 name = h->root.root.string;
a75473eb
SC		 629 }
630
631 switch (r_type)
632 {
633 case R_IQ2000_HI16:
634 r = iq2000_elf_relocate_hi16 (input_bfd, rel, contents, relocation);
635 break;
636
637 case R_IQ2000_PC16:
638 rel->r_addend -= 4;
639 /* Fall through. */
640
641 default:
642 r = iq2000_final_link_relocate (howto, input_bfd, input_section,
643 contents, rel, relocation);
644 break;
645 }
646
647 if (r != bfd_reloc_ok)
648 {
649 const char * msg = (const char *) NULL;
650
651 switch (r)
652 {
653 case bfd_reloc_overflow:
654 r = info->callbacks->reloc_overflow
655 (info, name, howto->name, (bfd_vma) 0,
656 input_bfd, input_section, rel->r_offset);
657 break;
658
659 case bfd_reloc_undefined:
660 r = info->callbacks->undefined_symbol
661 (info, name, input_bfd, input_section, rel->r_offset, TRUE);
662 break;
663
664 case bfd_reloc_outofrange:
665 msg = _("internal error: out of range error");
666 break;
667
668 case bfd_reloc_notsupported:
669 msg = _("internal error: unsupported relocation error");
670 break;
671
672 case bfd_reloc_dangerous:
673 msg = _("internal error: dangerous relocation");
674 break;
675
676 default:
677 msg = _("internal error: unknown error");
678 break;
679 }
680
681 if (msg)
682 r = info->callbacks->warning
683 (info, msg, name, input_bfd, input_section, rel->r_offset);
684
685 if (! r)
686 return FALSE;
687 }
688 }
689
690 return TRUE;
691}
692\f
693
694/* Update the got entry reference counts for the section being
695 removed. */
696
697static bfd_boolean
698iq2000_elf_gc_sweep_hook (abfd, info, sec, relocs)
699 bfd * abfd ATTRIBUTE_UNUSED;
700 struct bfd_link_info * info ATTRIBUTE_UNUSED;
701 asection * sec ATTRIBUTE_UNUSED;
702 const Elf_Internal_Rela * relocs ATTRIBUTE_UNUSED;
703{
704 return TRUE;
705}
706
707/* Return the section that should be marked against GC for a given
708 relocation. */
709
710static asection *
711iq2000_elf_gc_mark_hook (sec, info, rel, h, sym)
712 asection * sec;
713 struct bfd_link_info * info ATTRIBUTE_UNUSED;
714 Elf_Internal_Rela * rel;
715 struct elf_link_hash_entry * h;
716 Elf_Internal_Sym * sym;
717{
718 if (h != NULL)
719 {
720 switch (ELF32_R_TYPE (rel->r_info))
721 {
722 case R_IQ2000_GNU_VTINHERIT:
723 case R_IQ2000_GNU_VTENTRY:
724 break;
725
726 default:
727 switch (h->root.type)
728 {
729 case bfd_link_hash_defined:
730 case bfd_link_hash_defweak:
731 return h->root.u.def.section;
732
733 case bfd_link_hash_common:
734 return h->root.u.c.p->section;
735
736 default:
737 break;
738 }
739 }
740 }
741 else
742 return bfd_section_from_elf_index (sec->owner, sym->st_shndx);
743
744 return NULL;
745}
746
747\f
748/* Return the MACH for an e_flags value. */
749
750static int
751elf32_iq2000_machine (abfd)
752 bfd *abfd;
753{
754 switch (elf_elfheader (abfd)->e_flags & EF_IQ2000_CPU_MASK)
755 {
756 case EF_IQ2000_CPU_IQ2000: return bfd_mach_iq2000;
757 case EF_IQ2000_CPU_IQ10: return bfd_mach_iq10;
758 }
759
760 return bfd_mach_iq2000;
761}
762
763\f
764/* Function to set the ELF flag bits. */
765
766static bfd_boolean
767iq2000_elf_set_private_flags (abfd, flags)
768 bfd *abfd;
769 flagword flags;
770{
771 elf_elfheader (abfd)->e_flags = flags;
772 elf_flags_init (abfd) = TRUE;
773 return TRUE;
774}
775
776/* Copy backend specific data from one object module to another. */
777
778static bfd_boolean
779iq2000_elf_copy_private_bfd_data (ibfd, obfd)
780 bfd *ibfd;
781 bfd *obfd;
782{
783 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
784 || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
785 return TRUE;
786
787 BFD_ASSERT (!elf_flags_init (obfd)
788 || elf_elfheader (obfd)->e_flags == elf_elfheader (ibfd)->e_flags);
789
790 elf_elfheader (obfd)->e_flags = elf_elfheader (ibfd)->e_flags;
791 elf_flags_init (obfd) = TRUE;
792 return TRUE;
793}
794
795/* Merge backend specific data from an object file to the output
796 object file when linking. */
797
798static bfd_boolean
799iq2000_elf_merge_private_bfd_data (ibfd, obfd)
800 bfd *ibfd;
801 bfd *obfd;
802{
803 flagword old_flags, old_partial;
804 flagword new_flags, new_partial;
805 bfd_boolean error = FALSE;
806 char new_opt[80];
807 char old_opt[80];
808
809 new_opt[0] = old_opt[0] = '\0';
810 new_flags = elf_elfheader (ibfd)->e_flags;
811 old_flags = elf_elfheader (obfd)->e_flags;
812
813#ifdef DEBUG
814 (*_bfd_error_handler) ("old_flags = 0x%.8lx, new_flags = 0x%.8lx, init = %s, filename = %s",
815 old_flags, new_flags, elf_flags_init (obfd) ? "yes" : "no",
816 bfd_get_filename (ibfd));
817#endif
818
819 if (!elf_flags_init (obfd))
820 {
821 /* First call, no flags set. */
822 elf_flags_init (obfd) = TRUE;
823 elf_elfheader (obfd)->e_flags = new_flags;
824 }
825
826 else if (new_flags == old_flags)
827 /* Compatible flags are ok. */
828 ;
829
830 else /* Possibly incompatible flags. */
831 {
832 /* Warn if different cpu is used (allow a specific cpu to override
833 the generic cpu). */
834 new_partial = (new_flags & EF_IQ2000_CPU_MASK);
835 old_partial = (old_flags & EF_IQ2000_CPU_MASK);
836 if (new_partial == old_partial)
837 ;
838
839 else
840 {
841 switch (new_partial)
842 {
843 default: strcat (new_opt, " -m2000"); break;
844 case EF_IQ2000_CPU_IQ2000: strcat (new_opt, " -m2000"); break;
845 case EF_IQ2000_CPU_IQ10: strcat (new_opt, " -m10"); break;
846 }
847
848 switch (old_partial)
849 {
850 default: strcat (old_opt, " -m2000"); break;
851 case EF_IQ2000_CPU_IQ2000: strcat (old_opt, " -m2000"); break;
852 case EF_IQ2000_CPU_IQ10: strcat (old_opt, " -m10"); break;
853 }
854 }
855
856 /* Print out any mismatches from above. */
857 if (new_opt[0])
858 {
859 error = TRUE;
860 (*_bfd_error_handler)
861 (_("%s: compiled with %s and linked with modules compiled with %s"),
862 bfd_get_filename (ibfd), new_opt, old_opt);
863 }
864
865 new_flags &= ~ EF_IQ2000_ALL_FLAGS;
866 old_flags &= ~ EF_IQ2000_ALL_FLAGS;
867
868 /* Warn about any other mismatches. */
869 if (new_flags != old_flags)
870 {
871 error = TRUE;
872 (*_bfd_error_handler)
873 (_("%s: uses different e_flags (0x%lx) fields than previous modules (0x%lx)"),
874 bfd_get_filename (ibfd), (long)new_flags, (long)old_flags);
875 }
876 }
877
878 if (error)
879 bfd_set_error (bfd_error_bad_value);
880
881 return !error;
882}
883
884\f
885static bfd_boolean
886iq2000_elf_print_private_bfd_data (abfd, ptr)
887 bfd *abfd;
888 PTR ptr;
889{
890 FILE *file = (FILE *) ptr;
891 flagword flags;
892
893 BFD_ASSERT (abfd != NULL && ptr != NULL);
894
895 /* Print normal ELF private data. */
896 _bfd_elf_print_private_bfd_data (abfd, ptr);
897
898 flags = elf_elfheader (abfd)->e_flags;
899 fprintf (file, _("private flags = 0x%lx:"), (long)flags);
900
901 switch (flags & EF_IQ2000_CPU_MASK)
902 {
903 default: break;
904 case EF_IQ2000_CPU_IQ2000: fprintf (file, " -m2000"); break;
905 case EF_IQ2000_CPU_IQ10: fprintf (file, " -m10"); break;
906 }
907
908 fputc ('\n', file);
60d8b524 909 return TRUE;
a75473eb
SC		 910}
911
912static
913bfd_boolean
914iq2000_elf_object_p (abfd)
915 bfd *abfd;
916{
917 /* Irix 5 and 6 is broken. Object file symbol tables are not always
918 sorted correctly such that local symbols precede global symbols,
919 and the sh_info field in the symbol table is not always right. */
920 elf_bad_symtab (abfd) = TRUE;
921
922 bfd_default_set_arch_mach (abfd, bfd_arch_iq2000,
923 elf32_iq2000_machine (abfd));
924 return TRUE;
925}
926
927\f
928#define ELF_ARCH bfd_arch_iq2000
929#define ELF_MACHINE_CODE EM_IQ2000
930#define ELF_MAXPAGESIZE 0x1000
931
932#define TARGET_BIG_SYM bfd_elf32_iq2000_vec
933#define TARGET_BIG_NAME "elf32-iq2000"
934
935#define elf_info_to_howto_rel NULL
936#define elf_info_to_howto iq2000_info_to_howto_rela
937#define elf_backend_relocate_section iq2000_elf_relocate_section
938#define elf_backend_gc_mark_hook iq2000_elf_gc_mark_hook
939#define elf_backend_gc_sweep_hook iq2000_elf_gc_sweep_hook
940#define elf_backend_check_relocs iq2000_elf_check_relocs
941#define elf_backend_object_p iq2000_elf_object_p
942#define elf_backend_rela_normal 1
943
944#define elf_backend_can_gc_sections 1
945
946#define bfd_elf32_bfd_reloc_type_lookup iq2000_reloc_type_lookup
947#define bfd_elf32_bfd_set_private_flags iq2000_elf_set_private_flags
948#define bfd_elf32_bfd_copy_private_bfd_data iq2000_elf_copy_private_bfd_data
949#define bfd_elf32_bfd_merge_private_bfd_data iq2000_elf_merge_private_bfd_data
950#define bfd_elf32_bfd_print_private_bfd_data iq2000_elf_print_private_bfd_data
951
952#include "elf32-target.h"
GDB Binutils - Deliverables
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