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relocate the entry point address when used
[deliverable/binutils-gdb.git] / bfd / elf32-iq2000.c
CommitLineData
a75473eb 1/* IQ2000-specific support for 32-bit ELF.
dbaa2011 2 Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2010, 2012
ab96bf03 3 Free Software Foundation, Inc.
a75473eb 4
58852c27 5 This file is part of BFD, the Binary File Descriptor library.
a75473eb 6
58852c27
NC		 7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
cd123cb7 9 the Free Software Foundation; either version 3 of the License, or
58852c27 10 (at your option) any later version.
a75473eb 11
58852c27
NC		 12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
a75473eb 16
58852c27
NC		 17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
3e110533 19 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */
a75473eb 20
a75473eb 21#include "sysdep.h"
3db64b00 22#include "bfd.h"
a75473eb
SC		 23#include "libbfd.h"
24#include "elf-bfd.h"
25#include "elf/iq2000.h"
26
27/* Forward declarations. */
28
58852c27 29static bfd_reloc_status_type iq2000_elf_howto_hi16_reloc (bfd *, arelent *, asymbol *, void *, asection *, bfd *, char **);
a75473eb
SC		 30
31\f
32static reloc_howto_type iq2000_elf_howto_table [] =
33{
34 /* This reloc does nothing. */
35
36 HOWTO (R_IQ2000_NONE, /* type */
37 0, /* rightshift */
38 2, /* size (0 = byte, 1 = short, 2 = long) */
39 32, /* bitsize */
40 FALSE, /* pc_relative */
41 0, /* bitpos */
42 complain_overflow_bitfield, /* complain_on_overflow */
43 bfd_elf_generic_reloc, /* special_function */
44 "R_IQ2000_NONE", /* name */
45 FALSE, /* partial_inplace */
46 0, /* src_mask */
47 0, /* dst_mask */
48 FALSE), /* pcrel_offset */
49
50 /* A 16 bit absolute relocation. */
51 HOWTO (R_IQ2000_16, /* type */
52 0, /* rightshift */
53 1, /* size (0 = byte, 1 = short, 2 = long) */
54 16, /* bitsize */
55 FALSE, /* pc_relative */
56 0, /* bitpos */
57 complain_overflow_bitfield, /* complain_on_overflow */
58 bfd_elf_generic_reloc, /* special_function */
59 "R_IQ2000_16", /* name */
60 FALSE, /* partial_inplace */
61 0x0000, /* src_mask */
62 0xffff, /* dst_mask */
63 FALSE), /* pcrel_offset */
64
65 /* A 32 bit absolute relocation. */
66 HOWTO (R_IQ2000_32, /* type */
67 0, /* rightshift */
68 2, /* size (0 = byte, 1 = short, 2 = long) */
69 31, /* bitsize */
70 FALSE, /* pc_relative */
71 0, /* bitpos */
72 complain_overflow_bitfield, /* complain_on_overflow */
73 bfd_elf_generic_reloc, /* special_function */
74 "R_IQ2000_32", /* name */
75 FALSE, /* partial_inplace */
76 0x00000000, /* src_mask */
77 0x7fffffff, /* dst_mask */
78 FALSE), /* pcrel_offset */
79
80 /* 26 bit branch address. */
81 HOWTO (R_IQ2000_26, /* type */
82 2, /* rightshift */
83 2, /* size (0 = byte, 1 = short, 2 = long) */
84 26, /* bitsize */
85 FALSE, /* pc_relative */
86 0, /* bitpos */
87 complain_overflow_dont, /* complain_on_overflow */
88 /* This needs complex overflow
89 detection, because the upper four
90 bits must match the PC. */
91 bfd_elf_generic_reloc, /* special_function */
92 "R_IQ2000_26", /* name */
93 FALSE, /* partial_inplace */
94 0x00000000, /* src_mask */
95 0x03ffffff, /* dst_mask */
96 FALSE), /* pcrel_offset */
97
98 /* 16 bit PC relative reference. */
99 HOWTO (R_IQ2000_PC16, /* type */
100 2, /* rightshift */
101 2, /* size (0 = byte, 1 = short, 2 = long) */
102 16, /* bitsize */
103 TRUE, /* pc_relative */
104 0, /* bitpos */
105 complain_overflow_signed, /* complain_on_overflow */
106 bfd_elf_generic_reloc, /* special_function */
107 "R_IQ2000_PC16", /* name */
108 FALSE, /* partial_inplace */
109 0x0000, /* src_mask */
110 0xffff, /* dst_mask */
111 TRUE), /* pcrel_offset */
112
113 /* high 16 bits of symbol value. */
114 HOWTO (R_IQ2000_HI16, /* type */
115 16, /* rightshift */
116 2, /* size (0 = byte, 1 = short, 2 = long) */
117 15, /* bitsize */
118 FALSE, /* pc_relative */
119 0, /* bitpos */
120 complain_overflow_dont, /* complain_on_overflow */
121 iq2000_elf_howto_hi16_reloc, /* special_function */
122 "R_IQ2000_HI16", /* name */
123 FALSE, /* partial_inplace */
124 0x0000, /* src_mask */
125 0x7fff, /* dst_mask */
126 FALSE), /* pcrel_offset */
127
128 /* Low 16 bits of symbol value. */
129 HOWTO (R_IQ2000_LO16, /* type */
130 0, /* rightshift */
131 2, /* size (0 = byte, 1 = short, 2 = long) */
132 16, /* bitsize */
133 FALSE, /* pc_relative */
134 0, /* bitpos */
135 complain_overflow_dont, /* complain_on_overflow */
136 bfd_elf_generic_reloc, /* special_function */
137 "R_IQ2000_LO16", /* name */
138 FALSE, /* partial_inplace */
139 0x0000, /* src_mask */
140 0xffff, /* dst_mask */
141 FALSE), /* pcrel_offset */
142
143 /* 16-bit jump offset. */
144 HOWTO (R_IQ2000_OFFSET_16, /* type */
145 2, /* rightshift */
146 2, /* size (0 = byte, 1 = short, 2 = long) */
147 16, /* bitsize */
148 FALSE, /* pc_relative */
149 0, /* bitpos */
150 complain_overflow_dont, /* complain_on_overflow */
151 bfd_elf_generic_reloc, /* special_function */
152 "R_IQ2000_OFFSET_16", /* name */
153 FALSE, /* partial_inplace */
154 0x0000, /* src_mask */
155 0xffff, /* dst_mask */
156 FALSE), /* pcrel_offset */
157
158 /* 21-bit jump offset. */
159 HOWTO (R_IQ2000_OFFSET_21, /* type */
160 2, /* rightshift */
161 2, /* size (0 = byte, 1 = short, 2 = long) */
162 21, /* bitsize */
163 FALSE, /* pc_relative */
164 0, /* bitpos */
165 complain_overflow_dont, /* complain_on_overflow */
166 bfd_elf_generic_reloc, /* special_function */
167 "R_IQ2000_OFFSET_21", /* name */
168 FALSE, /* partial_inplace */
169 0x000000, /* src_mask */
170 0x1fffff, /* dst_mask */
171 FALSE), /* pcrel_offset */
172
173 /* unsigned high 16 bits of value. */
174 HOWTO (R_IQ2000_OFFSET_21, /* type */
175 16, /* rightshift */
176 2, /* size (0 = byte, 1 = short, 2 = long) */
177 16, /* bitsize */
178 FALSE, /* pc_relative */
179 0, /* bitpos */
180 complain_overflow_dont, /* complain_on_overflow */
181 bfd_elf_generic_reloc, /* special_function */
182 "R_IQ2000_UHI16", /* name */
183 FALSE, /* partial_inplace */
184 0x0000, /* src_mask */
185 0x7fff, /* dst_mask */
186 FALSE), /* pcrel_offset */
187
188 /* A 32 bit absolute debug relocation. */
189 HOWTO (R_IQ2000_32_DEBUG, /* type */
190 0, /* rightshift */
191 2, /* size (0 = byte, 1 = short, 2 = long) */
192 32, /* bitsize */
193 FALSE, /* pc_relative */
194 0, /* bitpos */
195 complain_overflow_bitfield, /* complain_on_overflow */
196 bfd_elf_generic_reloc, /* special_function */
197 "R_IQ2000_32", /* name */
198 FALSE, /* partial_inplace */
199 0x00000000, /* src_mask */
200 0xffffffff, /* dst_mask */
201 FALSE), /* pcrel_offset */
202
203};
204
205/* GNU extension to record C++ vtable hierarchy. */
206static 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. */
222static 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
a75473eb 238static bfd_reloc_status_type
58852c27
NC		 239iq2000_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)
a75473eb
SC		 246{
247 bfd_reloc_status_type ret;
248 bfd_vma relocation;
249
58852c27
NC		 250 /* If we're relocating and this an external symbol,
251 we don't want to change anything. */
a75473eb
SC		 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
58852c27 269 /* If %lo will have sign-extension, compensate by add 0x10000 to hi portion. */
a75473eb
SC		 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
58852c27 277 /* Put it back the way it was. */
a75473eb
SC		 278 if (relocation & 0x8000)
279 reloc_entry->addend -= 0x10000;
280
281 return ret;
282}
283
284static bfd_reloc_status_type
58852c27
NC		 285iq2000_elf_relocate_hi16 (bfd *input_bfd,
286 Elf_Internal_Rela *relhi,
287 bfd_byte *contents,
288 bfd_vma value)
a75473eb
SC		 289{
290 bfd_vma insn;
291
292 insn = bfd_get_32 (input_bfd, contents + relhi->r_offset);
68ffbac6 293
a75473eb 294 value += relhi->r_addend;
58852c27 295 value &= 0x7fffffff; /* Mask off top-bit which is Harvard mask bit. */
a75473eb 296
58852c27
NC		 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. */
a75473eb
SC		 299 if (value & 0x8000)
300 value += 0x10000;
301
68ffbac6 302 value >>= 16;
a75473eb
SC		 303 insn = ((insn & ~0xFFFF) | value);
304
305 bfd_put_32 (input_bfd, insn, contents + relhi->r_offset);
306 return bfd_reloc_ok;
307}
308
f15557e4
DD		 309static bfd_reloc_status_type
310iq2000_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
6c408f53
NC		 337/* Map BFD reloc types to IQ2000 ELF reloc types. */
338
a75473eb 339static reloc_howto_type *
de52dba4
AM		 340iq2000_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
341 bfd_reloc_code_real_type code)
a75473eb
SC		 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
157090f7
AM		 381static reloc_howto_type *
382iq2000_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}
a75473eb
SC		 401\f
402/* Perform a single relocation. By default we use the standard BFD
403 routines. */
404
405static bfd_reloc_status_type
58852c27
NC		 406iq2000_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)
a75473eb
SC		 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
420static void
58852c27
NC		 421iq2000_info_to_howto_rela (bfd * abfd ATTRIBUTE_UNUSED,
422 arelent * cache_ptr,
423 Elf_Internal_Rela * dst)
a75473eb
SC		 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. */
68ffbac6 447
a75473eb 448static bfd_boolean
58852c27
NC		 449iq2000_elf_check_relocs (bfd *abfd,
450 struct bfd_link_info *info,
451 asection *sec,
452 const Elf_Internal_Rela *relocs)
a75473eb
SC		 453{
454 Elf_Internal_Shdr *symtab_hdr;
5582a088 455 struct elf_link_hash_entry **sym_hashes;
60d8b524
AM		 456 const Elf_Internal_Rela *rel;
457 const Elf_Internal_Rela *rel_end;
458 bfd_boolean changed = FALSE;
68ffbac6 459
1049f94e 460 if (info->relocatable)
a75473eb 461 return TRUE;
68ffbac6 462
a75473eb
SC		 463 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
464 sym_hashes = elf_sym_hashes (abfd);
68ffbac6 465
a75473eb
SC		 466 rel_end = relocs + sec->reloc_count;
467 for (rel = relocs; rel < rel_end; rel++)
468 {
469 struct elf_link_hash_entry *h;
470 unsigned long r_symndx;
68ffbac6 471
a75473eb
SC		 472 r_symndx = ELF32_R_SYM (rel->r_info);
473 if (r_symndx < symtab_hdr->sh_info)
474 h = NULL;
475 else
973a3492
L		 476 {
477 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
478 while (h->root.type == bfd_link_hash_indirect
479 || h->root.type == bfd_link_hash_warning)
480 h = (struct elf_link_hash_entry *) h->root.u.i.link;
81fbe831
AM		 481
482 /* PR15323, ref flags aren't set for references in the same
483 object. */
484 h->root.non_ir_ref = 1;
973a3492 485 }
68ffbac6 486
a75473eb
SC		 487 switch (ELF32_R_TYPE (rel->r_info))
488 {
58852c27
NC		 489 /* This relocation describes the C++ object vtable
490 hierarchy. Reconstruct it for later use during GC. */
a75473eb 491 case R_IQ2000_GNU_VTINHERIT:
c152c796 492 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
a75473eb
SC		 493 return FALSE;
494 break;
68ffbac6 495
58852c27
NC		 496 /* This relocation describes which C++ vtable entries
497 are actually used. Record for later use during GC. */
a75473eb 498 case R_IQ2000_GNU_VTENTRY:
d17e0c6e
JB		 499 BFD_ASSERT (h != NULL);
500 if (h != NULL
501 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
a75473eb
SC		 502 return FALSE;
503 break;
504
505 case R_IQ2000_32:
58852c27 506 /* For debug section, change to special harvard-aware relocations. */
0112cd26
NC		 507 if (CONST_STRNEQ (sec->name, ".debug")
508 || CONST_STRNEQ (sec->name, ".stab")
509 || CONST_STRNEQ (sec->name, ".eh_frame"))
60d8b524
AM		 510 {
511 ((Elf_Internal_Rela *) rel)->r_info
512 = ELF32_R_INFO (ELF32_R_SYM (rel->r_info), R_IQ2000_32_DEBUG);
513 changed = TRUE;
514 }
a75473eb
SC		 515 break;
516 }
517 }
60d8b524
AM		 518
519 if (changed)
520 /* Note that we've changed relocs, otherwise if !info->keep_memory
521 we'll free the relocs and lose our changes. */
d5cb4bb8 522 elf_section_data (sec)->relocs = (Elf_Internal_Rela *) relocs;
60d8b524 523
a75473eb
SC		 524 return TRUE;
525}
526
527\f
528/* Relocate a IQ2000 ELF section.
529 There is some attempt to make this function usable for many architectures,
530 both USE_REL and USE_RELA ['twould be nice if such a critter existed],
531 if only to serve as a learning tool.
532
533 The RELOCATE_SECTION function is called by the new ELF backend linker
534 to handle the relocations for a section.
535
536 The relocs are always passed as Rela structures; if the section
537 actually uses Rel structures, the r_addend field will always be
538 zero.
539
540 This function is responsible for adjusting the section contents as
1049f94e 541 necessary, and (if using Rela relocs and generating a relocatable
a75473eb
SC		 542 output file) adjusting the reloc addend as necessary.
543
544 This function does not have to worry about setting the reloc
545 address or the reloc symbol index.
546
547 LOCAL_SYMS is a pointer to the swapped in local symbols.
548
549 LOCAL_SECTIONS is an array giving the section in the input file
550 corresponding to the st_shndx field of each local symbol.
551
552 The global hash table entry for the global symbols can be found
553 via elf_sym_hashes (input_bfd).
554
1049f94e 555 When generating relocatable output, this function must handle
a75473eb
SC		 556 STB_LOCAL/STT_SECTION symbols specially. The output symbol is
557 going to be the section symbol corresponding to the output
558 section, which means that the addend must be adjusted
559 accordingly. */
560
561static bfd_boolean
58852c27
NC		 562iq2000_elf_relocate_section (bfd * output_bfd ATTRIBUTE_UNUSED,
563 struct bfd_link_info * info,
564 bfd * input_bfd,
565 asection * input_section,
566 bfd_byte * contents,
567 Elf_Internal_Rela * relocs,
568 Elf_Internal_Sym * local_syms,
569 asection ** local_sections)
a75473eb
SC		 570{
571 Elf_Internal_Shdr * symtab_hdr;
572 struct elf_link_hash_entry ** sym_hashes;
573 Elf_Internal_Rela * rel;
574 Elf_Internal_Rela * relend;
575
576 symtab_hdr = & elf_tdata (input_bfd)->symtab_hdr;
577 sym_hashes = elf_sym_hashes (input_bfd);
578 relend = relocs + input_section->reloc_count;
579
580 for (rel = relocs; rel < relend; rel ++)
581 {
582 reloc_howto_type * howto;
583 unsigned long r_symndx;
584 Elf_Internal_Sym * sym;
585 asection * sec;
586 struct elf_link_hash_entry * h;
587 bfd_vma relocation;
588 bfd_reloc_status_type r;
589 const char * name = NULL;
590 int r_type;
68ffbac6 591
a75473eb 592 r_type = ELF32_R_TYPE (rel->r_info);
68ffbac6 593
a75473eb
SC		 594 if ( r_type == R_IQ2000_GNU_VTINHERIT
595 || r_type == R_IQ2000_GNU_VTENTRY)
596 continue;
68ffbac6 597
a75473eb
SC		 598 r_symndx = ELF32_R_SYM (rel->r_info);
599
a75473eb
SC		 600 howto = iq2000_elf_howto_table + ELF32_R_TYPE (rel->r_info);
601 h = NULL;
602 sym = NULL;
603 sec = NULL;
68ffbac6 604
a75473eb
SC		 605 if (r_symndx < symtab_hdr->sh_info)
606 {
f15557e4
DD		 607 asection *osec;
608
a75473eb 609 sym = local_syms + r_symndx;
f15557e4
DD		 610 osec = sec = local_sections [r_symndx];
611 if ((sec->flags & SEC_MERGE)
612 && ELF_ST_TYPE (sym->st_info) == STT_SECTION)
613 /* This relocation is relative to a section symbol that is
614 going to be merged. Change it so that it is relative
615 to the merged section symbol. */
616 rel->r_addend = _bfd_elf_rel_local_sym (output_bfd, sym, &sec,
617 rel->r_addend);
618
a75473eb
SC		 619 relocation = (sec->output_section->vma
620 + sec->output_offset
621 + sym->st_value);
68ffbac6 622
a75473eb
SC		 623 name = bfd_elf_string_from_elf_section
624 (input_bfd, symtab_hdr->sh_link, sym->st_name);
f15557e4 625 name = (name == NULL) ? bfd_section_name (input_bfd, osec) : name;
a75473eb
SC		 626 }
627 else
628 {
560e09e9 629 bfd_boolean unresolved_reloc;
62d887d4 630 bfd_boolean warned, ignored;
560e09e9 631
b2a8e766
AM		 632 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
633 r_symndx, symtab_hdr, sym_hashes,
634 h, sec, relocation,
62d887d4 635 unresolved_reloc, warned, ignored);
a75473eb
SC		 636
637 name = h->root.root.string;
a75473eb
SC		 638 }
639
dbaa2011 640 if (sec != NULL && discarded_section (sec))
e4067dbb 641 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
545fd46b 642 rel, 1, relend, howto, 0, contents);
ab96bf03
AM		 643
644 if (info->relocatable)
645 continue;
646
a75473eb
SC		 647 switch (r_type)
648 {
649 case R_IQ2000_HI16:
650 r = iq2000_elf_relocate_hi16 (input_bfd, rel, contents, relocation);
651 break;
652
f15557e4
DD		 653 case R_IQ2000_OFFSET_16:
654 r = iq2000_elf_relocate_offset16 (input_bfd, rel, contents, relocation,
655 input_section->output_section->vma
656 + input_section->output_offset
657 + rel->r_offset);
658 break;
659
a75473eb
SC		 660 case R_IQ2000_PC16:
661 rel->r_addend -= 4;
662 /* Fall through. */
663
664 default:
665 r = iq2000_final_link_relocate (howto, input_bfd, input_section,
666 contents, rel, relocation);
667 break;
668 }
669
670 if (r != bfd_reloc_ok)
671 {
672 const char * msg = (const char *) NULL;
673
674 switch (r)
675 {
676 case bfd_reloc_overflow:
677 r = info->callbacks->reloc_overflow
dfeffb9f
L		 678 (info, (h ? &h->root : NULL), name, howto->name,
679 (bfd_vma) 0, input_bfd, input_section, rel->r_offset);
a75473eb 680 break;
68ffbac6 681
a75473eb
SC		 682 case bfd_reloc_undefined:
683 r = info->callbacks->undefined_symbol
684 (info, name, input_bfd, input_section, rel->r_offset, TRUE);
685 break;
68ffbac6 686
a75473eb
SC		 687 case bfd_reloc_outofrange:
688 msg = _("internal error: out of range error");
689 break;
690
691 case bfd_reloc_notsupported:
692 msg = _("internal error: unsupported relocation error");
693 break;
694
695 case bfd_reloc_dangerous:
696 msg = _("internal error: dangerous relocation");
697 break;
698
699 default:
700 msg = _("internal error: unknown error");
701 break;
702 }
703
704 if (msg)
705 r = info->callbacks->warning
706 (info, msg, name, input_bfd, input_section, rel->r_offset);
707
708 if (! r)
709 return FALSE;
710 }
711 }
712
713 return TRUE;
714}
715\f
716
a75473eb
SC		 717/* Return the section that should be marked against GC for a given
718 relocation. */
719
720static asection *
07adf181
AM		 721iq2000_elf_gc_mark_hook (asection *sec,
722 struct bfd_link_info *info,
723 Elf_Internal_Rela *rel,
724 struct elf_link_hash_entry *h,
725 Elf_Internal_Sym *sym)
a75473eb 726{
07adf181
AM		 727 if (h != NULL)
728 switch (ELF32_R_TYPE (rel->r_info))
729 {
730 case R_IQ2000_GNU_VTINHERIT:
731 case R_IQ2000_GNU_VTENTRY:
732 return NULL;
733 }
734
735 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
a75473eb
SC		 736}
737
738\f
739/* Return the MACH for an e_flags value. */
740
741static int
58852c27 742elf32_iq2000_machine (bfd *abfd)
a75473eb
SC		 743{
744 switch (elf_elfheader (abfd)->e_flags & EF_IQ2000_CPU_MASK)
745 {
58852c27
NC		 746 case EF_IQ2000_CPU_IQ10:
747 return bfd_mach_iq10;
a75473eb 748
58852c27
NC		 749 case EF_IQ2000_CPU_IQ2000:
750 default:
751 return bfd_mach_iq2000;
752 }
a75473eb
SC		 753}
754
755\f
756/* Function to set the ELF flag bits. */
757
758static bfd_boolean
58852c27 759iq2000_elf_set_private_flags (bfd *abfd, flagword flags)
a75473eb
SC		 760{
761 elf_elfheader (abfd)->e_flags = flags;
762 elf_flags_init (abfd) = TRUE;
763 return TRUE;
764}
765
58852c27
NC		 766/* Merge backend specific data from an object
767 file to the output object file when linking. */
a75473eb
SC		 768
769static bfd_boolean
58852c27 770iq2000_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
a75473eb
SC		 771{
772 flagword old_flags, old_partial;
773 flagword new_flags, new_partial;
774 bfd_boolean error = FALSE;
775 char new_opt[80];
776 char old_opt[80];
777
778 new_opt[0] = old_opt[0] = '\0';
779 new_flags = elf_elfheader (ibfd)->e_flags;
780 old_flags = elf_elfheader (obfd)->e_flags;
781
a75473eb
SC		 782 if (!elf_flags_init (obfd))
783 {
784 /* First call, no flags set. */
785 elf_flags_init (obfd) = TRUE;
786 elf_elfheader (obfd)->e_flags = new_flags;
787 }
788
58852c27 789 else if (new_flags != old_flags)
a75473eb 790 {
58852c27
NC		 791 /* Warn if different cpu is used, but allow a
792 specific cpu to override the generic cpu. */
a75473eb
SC		 793 new_partial = (new_flags & EF_IQ2000_CPU_MASK);
794 old_partial = (old_flags & EF_IQ2000_CPU_MASK);
a75473eb 795
58852c27 796 if (new_partial != old_partial)
a75473eb
SC		 797 {
798 switch (new_partial)
799 {
58852c27
NC		 800 case EF_IQ2000_CPU_IQ10:
801 strcat (new_opt, " -m10");
802 break;
803
804 default:
805 case EF_IQ2000_CPU_IQ2000:
806 strcat (new_opt, " -m2000");
807 break;
a75473eb
SC		 808 }
809
810 switch (old_partial)
811 {
58852c27
NC		 812 case EF_IQ2000_CPU_IQ10:
813 strcat (old_opt, " -m10");
814 break;
815
816 default:
817 case EF_IQ2000_CPU_IQ2000:
818 strcat (old_opt, " -m2000");
819 break;
a75473eb
SC		 820 }
821 }
68ffbac6 822
a75473eb
SC		 823 /* Print out any mismatches from above. */
824 if (new_opt[0])
825 {
826 error = TRUE;
58852c27 827 _bfd_error_handler
a75473eb
SC		 828 (_("%s: compiled with %s and linked with modules compiled with %s"),
829 bfd_get_filename (ibfd), new_opt, old_opt);
830 }
831
832 new_flags &= ~ EF_IQ2000_ALL_FLAGS;
833 old_flags &= ~ EF_IQ2000_ALL_FLAGS;
834
835 /* Warn about any other mismatches. */
836 if (new_flags != old_flags)
837 {
838 error = TRUE;
58852c27
NC		 839
840 _bfd_error_handler
a75473eb
SC		 841 (_("%s: uses different e_flags (0x%lx) fields than previous modules (0x%lx)"),
842 bfd_get_filename (ibfd), (long)new_flags, (long)old_flags);
843 }
844 }
845
846 if (error)
847 bfd_set_error (bfd_error_bad_value);
848
849 return !error;
850}
851
852\f
853static bfd_boolean
58852c27 854iq2000_elf_print_private_bfd_data (bfd *abfd, void * ptr)
a75473eb
SC		 855{
856 FILE *file = (FILE *) ptr;
857 flagword flags;
858
859 BFD_ASSERT (abfd != NULL && ptr != NULL);
860
861 /* Print normal ELF private data. */
862 _bfd_elf_print_private_bfd_data (abfd, ptr);
863
864 flags = elf_elfheader (abfd)->e_flags;
0af1713e 865 fprintf (file, _("private flags = 0x%lx:"), (unsigned long) flags);
a75473eb
SC		 866
867 switch (flags & EF_IQ2000_CPU_MASK)
868 {
58852c27
NC		 869 case EF_IQ2000_CPU_IQ10:
870 fprintf (file, " -m10");
871 break;
872 case EF_IQ2000_CPU_IQ2000:
873 fprintf (file, " -m2000");
874 break;
875 default:
876 break;
a75473eb
SC		 877 }
878
879 fputc ('\n', file);
60d8b524 880 return TRUE;
a75473eb
SC		 881}
882
883static
884bfd_boolean
58852c27 885iq2000_elf_object_p (bfd *abfd)
a75473eb 886{
a75473eb
SC		 887 bfd_default_set_arch_mach (abfd, bfd_arch_iq2000,
888 elf32_iq2000_machine (abfd));
889 return TRUE;
890}
891
892\f
893#define ELF_ARCH bfd_arch_iq2000
894#define ELF_MACHINE_CODE EM_IQ2000
895#define ELF_MAXPAGESIZE 0x1000
896
897#define TARGET_BIG_SYM bfd_elf32_iq2000_vec
898#define TARGET_BIG_NAME "elf32-iq2000"
899
900#define elf_info_to_howto_rel NULL
901#define elf_info_to_howto iq2000_info_to_howto_rela
902#define elf_backend_relocate_section iq2000_elf_relocate_section
903#define elf_backend_gc_mark_hook iq2000_elf_gc_mark_hook
a75473eb
SC		 904#define elf_backend_check_relocs iq2000_elf_check_relocs
905#define elf_backend_object_p iq2000_elf_object_p
906#define elf_backend_rela_normal 1
907
908#define elf_backend_can_gc_sections 1
909
910#define bfd_elf32_bfd_reloc_type_lookup iq2000_reloc_type_lookup
157090f7 911#define bfd_elf32_bfd_reloc_name_lookup iq2000_reloc_name_lookup
a75473eb 912#define bfd_elf32_bfd_set_private_flags iq2000_elf_set_private_flags
a75473eb
SC		 913#define bfd_elf32_bfd_merge_private_bfd_data iq2000_elf_merge_private_bfd_data
914#define bfd_elf32_bfd_print_private_bfd_data iq2000_elf_print_private_bfd_data
915
916#include "elf32-target.h"
GDB Binutils - Deliverables
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