2007-06-01 Steve Ellcey <sje@cup.hp.com>
[binutils.git] / bfd / coff-or32.c
blob077e8f6bab28724149db1a0bcf94186ac8e433b5
1 /* BFD back-end for OpenRISC 1000 COFF binaries.
2 Copyright 2002, 2003, 2004, 2005, 2007 Free Software Foundation, Inc.
3 Contributed by Ivan Guzvinec <ivang@opencores.org>
5 This file is part of BFD, the Binary File Descriptor library.
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
9 the Free Software Foundation; either version 2 of the License, or
10 (at your option) any later version.
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.
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
19 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */
21 #define OR32 1
23 #include "sysdep.h"
24 #include "bfd.h"
25 #include "libbfd.h"
26 #include "coff/or32.h"
27 #include "coff/internal.h"
28 #include "libcoff.h"
30 static long get_symbol_value
31 PARAMS ((asymbol *));
32 static bfd_reloc_status_type or32_reloc
33 PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
34 static bfd_boolean coff_or32_relocate_section
35 PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *,
36 struct internal_reloc *, struct internal_syment *, asection **));
37 static bfd_boolean coff_or32_adjust_symndx
38 PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *,
39 struct internal_reloc *, bfd_boolean *));
40 static void reloc_processing
41 PARAMS ((arelent *, struct internal_reloc *, asymbol **, bfd *, asection *));
43 #define COFF_DEFAULT_SECTION_ALIGNMENT_POWER (2)
45 #define INSERT_HWORD(WORD,HWORD) \
46 (((WORD) & 0xffff0000) | ((HWORD)& 0x0000ffff))
47 #define EXTRACT_HWORD(WORD) \
48 ((WORD) & 0x0000ffff)
49 #define SIGN_EXTEND_HWORD(HWORD) \
50 ((HWORD) & 0x8000 ? (HWORD)|(~0xffffL) : (HWORD))
52 #define INSERT_JUMPTARG(WORD,JT) \
53 (((WORD) & 0xfc000000) | ((JT)& 0x03ffffff))
54 #define EXTRACT_JUMPTARG(WORD) \
55 ((WORD) & 0x03ffffff)
56 #define SIGN_EXTEND_JUMPTARG(JT) \
57 ((JT) & 0x04000000 ? (JT)|(~0x03ffffffL) : (JT))
59 /* Provided the symbol, returns the value reffed. */
61 static long
62 get_symbol_value (symbol)
63 asymbol *symbol;
65 long relocation = 0;
67 if (bfd_is_com_section (symbol->section))
68 relocation = 0;
69 else
70 relocation = symbol->value +
71 symbol->section->output_section->vma +
72 symbol->section->output_offset;
74 return relocation;
77 /* This function is in charge of performing all the or32 relocations. */
79 static bfd_reloc_status_type
80 or32_reloc (abfd, reloc_entry, symbol_in, data, input_section, output_bfd,
81 error_message)
82 bfd *abfd;
83 arelent *reloc_entry;
84 asymbol *symbol_in;
85 PTR data;
86 asection *input_section;
87 bfd *output_bfd;
88 char **error_message;
90 /* The consth relocation comes in two parts, we have to remember
91 the state between calls, in these variables. */
92 static bfd_boolean part1_consth_active = FALSE;
93 static unsigned long part1_consth_value;
95 unsigned long insn;
96 unsigned long sym_value;
97 unsigned long unsigned_value;
98 unsigned short r_type;
99 long signed_value;
101 unsigned long addr = reloc_entry->address ; /*+ input_section->vma*/
102 bfd_byte *hit_data =addr + (bfd_byte *)(data);
104 r_type = reloc_entry->howto->type;
106 if (output_bfd)
108 /* Partial linking - do nothing. */
109 reloc_entry->address += input_section->output_offset;
110 return bfd_reloc_ok;
113 if (symbol_in != NULL
114 && bfd_is_und_section (symbol_in->section))
116 /* Keep the state machine happy in case we're called again. */
117 if (r_type == R_IHIHALF)
119 part1_consth_active = TRUE;
120 part1_consth_value = 0;
123 return bfd_reloc_undefined;
126 if ((part1_consth_active) && (r_type != R_IHCONST))
128 part1_consth_active = FALSE;
129 *error_message = (char *) "Missing IHCONST";
131 return bfd_reloc_dangerous;
134 sym_value = get_symbol_value (symbol_in);
136 switch (r_type)
138 case R_IREL:
139 insn = bfd_get_32(abfd, hit_data);
141 /* Take the value in the field and sign extend it. */
142 signed_value = EXTRACT_JUMPTARG (insn);
143 signed_value = SIGN_EXTEND_JUMPTARG (signed_value);
144 signed_value <<= 2;
146 /* See the note on the R_IREL reloc in coff_or32_relocate_section. */
147 if (signed_value == - (long) reloc_entry->address)
148 signed_value = 0;
150 signed_value += sym_value + reloc_entry->addend;
151 /* Relative jmp/call, so subtract from the value the
152 address of the place we're coming from. */
153 signed_value -= (reloc_entry->address
154 + input_section->output_section->vma
155 + input_section->output_offset);
156 if (signed_value > 0x7ffffff || signed_value < -0x8000000)
157 return bfd_reloc_overflow;
159 signed_value >>= 2;
160 insn = INSERT_JUMPTARG (insn, signed_value);
161 bfd_put_32 (abfd, insn, hit_data);
162 break;
164 case R_ILOHALF:
165 insn = bfd_get_32 (abfd, hit_data);
166 unsigned_value = EXTRACT_HWORD (insn);
167 unsigned_value += sym_value + reloc_entry->addend;
168 insn = INSERT_HWORD (insn, unsigned_value);
169 bfd_put_32 (abfd, insn, hit_data);
170 break;
172 case R_IHIHALF:
173 insn = bfd_get_32 (abfd, hit_data);
175 /* consth, part 1
176 Just get the symbol value that is referenced. */
177 part1_consth_active = TRUE;
178 part1_consth_value = sym_value + reloc_entry->addend;
180 /* Don't modify insn until R_IHCONST. */
181 break;
183 case R_IHCONST:
184 insn = bfd_get_32 (abfd, hit_data);
186 /* consth, part 2
187 Now relocate the reference. */
188 if (! part1_consth_active)
190 *error_message = (char *) "Missing IHIHALF";
191 return bfd_reloc_dangerous;
194 /* sym_ptr_ptr = r_symndx, in coff_slurp_reloc_table() */
195 unsigned_value = 0; /*EXTRACT_HWORD(insn) << 16;*/
196 unsigned_value += reloc_entry->addend; /* r_symndx */
197 unsigned_value += part1_consth_value;
198 unsigned_value = unsigned_value >> 16;
199 insn = INSERT_HWORD (insn, unsigned_value);
200 part1_consth_active = FALSE;
201 bfd_put_32 (abfd, insn, hit_data);
202 break;
204 case R_BYTE:
205 insn = bfd_get_8 (abfd, hit_data);
206 unsigned_value = insn + sym_value + reloc_entry->addend;
207 if (unsigned_value & 0xffffff00)
208 return bfd_reloc_overflow;
209 bfd_put_8 (abfd, unsigned_value, hit_data);
210 break;
212 case R_HWORD:
213 insn = bfd_get_16 (abfd, hit_data);
214 unsigned_value = insn + sym_value + reloc_entry->addend;
215 if (unsigned_value & 0xffff0000)
216 return bfd_reloc_overflow;
217 bfd_put_16 (abfd, insn, hit_data);
218 break;
220 case R_WORD:
221 insn = bfd_get_32 (abfd, hit_data);
222 insn += sym_value + reloc_entry->addend;
223 bfd_put_32 (abfd, insn, hit_data);
224 break;
226 default:
227 *error_message = _("Unrecognized reloc");
228 return bfd_reloc_dangerous;
231 return bfd_reloc_ok;
234 /* type rightshift
235 size
236 bitsize
237 pc-relative
238 bitpos
239 absolute
240 complain_on_overflow
241 special_function
242 relocation name
243 partial_inplace
244 src_mask
247 /* FIXME: I'm not real sure about this table. */
248 static reloc_howto_type howto_table[] =
250 { R_ABS, 0, 3, 32, FALSE, 0, complain_overflow_bitfield, or32_reloc, "ABS", TRUE, 0xffffffff,0xffffffff, FALSE },
251 EMPTY_HOWTO (1),
252 EMPTY_HOWTO (2),
253 EMPTY_HOWTO (3),
254 EMPTY_HOWTO (4),
255 EMPTY_HOWTO (5),
256 EMPTY_HOWTO (6),
257 EMPTY_HOWTO (7),
258 EMPTY_HOWTO (8),
259 EMPTY_HOWTO (9),
260 EMPTY_HOWTO (10),
261 EMPTY_HOWTO (11),
262 EMPTY_HOWTO (12),
263 EMPTY_HOWTO (13),
264 EMPTY_HOWTO (14),
265 EMPTY_HOWTO (15),
266 EMPTY_HOWTO (16),
267 EMPTY_HOWTO (17),
268 EMPTY_HOWTO (18),
269 EMPTY_HOWTO (19),
270 EMPTY_HOWTO (20),
271 EMPTY_HOWTO (21),
272 EMPTY_HOWTO (22),
273 EMPTY_HOWTO (23),
274 { R_IREL, 0, 3, 32, TRUE, 0, complain_overflow_signed, or32_reloc, "IREL", TRUE, 0xffffffff,0xffffffff, FALSE },
275 { R_IABS, 0, 3, 32, FALSE, 0, complain_overflow_bitfield, or32_reloc, "IABS", TRUE, 0xffffffff,0xffffffff, FALSE },
276 { R_ILOHALF, 0, 3, 16, TRUE, 0, complain_overflow_signed, or32_reloc, "ILOHALF", TRUE, 0x0000ffff,0x0000ffff, FALSE },
277 { R_IHIHALF, 0, 3, 16, TRUE, 16,complain_overflow_signed, or32_reloc, "IHIHALF", TRUE, 0xffff0000,0xffff0000, FALSE },
278 { R_IHCONST, 0, 3, 16, TRUE, 0, complain_overflow_signed, or32_reloc, "IHCONST", TRUE, 0xffff0000,0xffff0000, FALSE },
279 { R_BYTE, 0, 0, 8, FALSE, 0, complain_overflow_bitfield, or32_reloc, "BYTE", TRUE, 0x000000ff,0x000000ff, FALSE },
280 { R_HWORD, 0, 1, 16, FALSE, 0, complain_overflow_bitfield, or32_reloc, "HWORD", TRUE, 0x0000ffff,0x0000ffff, FALSE },
281 { R_WORD, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, or32_reloc, "WORD", TRUE, 0xffffffff,0xffffffff, FALSE },
284 #define BADMAG(x) OR32BADMAG (x)
286 #define RELOC_PROCESSING(relent, reloc, symbols, abfd, section) \
287 reloc_processing (relent, reloc, symbols, abfd, section)
289 static void
290 reloc_processing (relent,reloc, symbols, abfd, section)
291 arelent *relent;
292 struct internal_reloc *reloc;
293 asymbol **symbols;
294 bfd *abfd;
295 asection *section;
297 static bfd_vma ihihalf_vaddr = (bfd_vma) -1;
299 relent->address = reloc->r_vaddr;
300 relent->howto = howto_table + reloc->r_type;
302 if (reloc->r_type == R_IHCONST)
304 /* The address of an R_IHCONST should always be the address of
305 the immediately preceding R_IHIHALF. relocs generated by gas
306 are correct, but relocs generated by High C are different (I
307 can't figure out what the address means for High C). We can
308 handle both gas and High C by ignoring the address here, and
309 simply reusing the address saved for R_IHIHALF. */
310 if (ihihalf_vaddr == (bfd_vma) -1)
311 abort ();
313 relent->address = ihihalf_vaddr;
314 ihihalf_vaddr = (bfd_vma) -1;
315 relent->addend = reloc->r_symndx;
316 relent->sym_ptr_ptr= bfd_abs_section_ptr->symbol_ptr_ptr;
318 else
320 relent->sym_ptr_ptr = symbols + obj_convert (abfd)[reloc->r_symndx];
321 relent->addend = 0;
322 relent->address-= section->vma;
324 if (reloc->r_type == R_IHIHALF)
325 ihihalf_vaddr = relent->address;
326 else if (ihihalf_vaddr != (bfd_vma) -1)
327 abort ();
331 /* The reloc processing routine for the optimized COFF linker. */
333 static bfd_boolean
334 coff_or32_relocate_section (output_bfd, info, input_bfd, input_section,
335 contents, relocs, syms, sections)
336 bfd *output_bfd ATTRIBUTE_UNUSED;
337 struct bfd_link_info *info;
338 bfd *input_bfd;
339 asection *input_section;
340 bfd_byte *contents;
341 struct internal_reloc *relocs;
342 struct internal_syment *syms;
343 asection **sections;
345 struct internal_reloc *rel;
346 struct internal_reloc *relend;
347 bfd_boolean hihalf;
348 bfd_vma hihalf_val;
350 /* If we are performing a relocatable link, we don't need to do a
351 thing. The caller will take care of adjusting the reloc
352 addresses and symbol indices. */
353 if (info->relocatable)
354 return TRUE;
356 hihalf = FALSE;
357 hihalf_val = 0;
359 rel = relocs;
360 relend = rel + input_section->reloc_count;
362 for (; rel < relend; rel++)
364 long symndx;
365 bfd_byte *loc;
366 struct coff_link_hash_entry *h;
367 struct internal_syment *sym;
368 asection *sec;
369 bfd_vma val;
370 bfd_boolean overflow;
371 unsigned long insn;
372 long signed_value;
373 unsigned long unsigned_value;
374 bfd_reloc_status_type rstat;
376 symndx = rel->r_symndx;
377 loc = contents + rel->r_vaddr - input_section->vma;
379 if (symndx == -1 || rel->r_type == R_IHCONST)
380 h = NULL;
381 else
382 h = obj_coff_sym_hashes (input_bfd)[symndx];
384 sym = NULL;
385 sec = NULL;
386 val = 0;
388 /* An R_IHCONST reloc does not have a symbol. Instead, the
389 symbol index is an addend. R_IHCONST is always used in
390 conjunction with R_IHHALF. */
391 if (rel->r_type != R_IHCONST)
393 if (h == NULL)
395 if (symndx == -1)
396 sec = bfd_abs_section_ptr;
397 else
399 sym = syms + symndx;
400 sec = sections[symndx];
401 val = (sec->output_section->vma
402 + sec->output_offset
403 + sym->n_value
404 - sec->vma);
407 else
409 if (h->root.type == bfd_link_hash_defined
410 || h->root.type == bfd_link_hash_defweak)
412 sec = h->root.u.def.section;
413 val = (h->root.u.def.value
414 + sec->output_section->vma
415 + sec->output_offset);
417 else
419 if (! ((*info->callbacks->undefined_symbol)
420 (info, h->root.root.string, input_bfd, input_section,
421 rel->r_vaddr - input_section->vma, TRUE)))
422 return FALSE;
426 if (hihalf)
428 if (! ((*info->callbacks->reloc_dangerous)
429 (info, "missing IHCONST reloc", input_bfd,
430 input_section, rel->r_vaddr - input_section->vma)))
431 return FALSE;
432 hihalf = FALSE;
436 overflow = FALSE;
438 switch (rel->r_type)
440 default:
441 bfd_set_error (bfd_error_bad_value);
442 return FALSE;
444 case R_IREL:
445 insn = bfd_get_32 (input_bfd, loc);
447 /* Extract the addend. */
448 signed_value = EXTRACT_JUMPTARG (insn);
449 signed_value = SIGN_EXTEND_JUMPTARG (signed_value);
450 signed_value <<= 2;
452 /* Determine the destination of the jump. */
453 signed_value += val;
455 /* Make the destination PC relative. */
456 signed_value -= (input_section->output_section->vma
457 + input_section->output_offset
458 + (rel->r_vaddr - input_section->vma));
459 if (signed_value > 0x7ffffff || signed_value < - 0x8000000)
461 overflow = TRUE;
462 signed_value = 0;
465 /* Put the adjusted value back into the instruction. */
466 signed_value >>= 2;
467 insn = INSERT_JUMPTARG(insn, signed_value);
469 bfd_put_32 (input_bfd, (bfd_vma) insn, loc);
470 break;
472 case R_ILOHALF:
473 insn = bfd_get_32 (input_bfd, loc);
474 unsigned_value = EXTRACT_HWORD (insn);
475 unsigned_value += val;
476 insn = INSERT_HWORD (insn, unsigned_value);
477 bfd_put_32 (input_bfd, insn, loc);
478 break;
480 case R_IHIHALF:
481 /* Save the value for the R_IHCONST reloc. */
482 hihalf = TRUE;
483 hihalf_val = val;
484 break;
486 case R_IHCONST:
487 if (! hihalf)
489 if (! ((*info->callbacks->reloc_dangerous)
490 (info, "missing IHIHALF reloc", input_bfd,
491 input_section, rel->r_vaddr - input_section->vma)))
492 return FALSE;
493 hihalf_val = 0;
496 insn = bfd_get_32 (input_bfd, loc);
497 unsigned_value = rel->r_symndx + hihalf_val;
498 unsigned_value >>= 16;
499 insn = INSERT_HWORD (insn, unsigned_value);
500 bfd_put_32 (input_bfd, (bfd_vma) insn, loc);
502 hihalf = FALSE;
503 break;
505 case R_BYTE:
506 case R_HWORD:
507 case R_WORD:
508 rstat = _bfd_relocate_contents (howto_table + rel->r_type,
509 input_bfd, val, loc);
510 if (rstat == bfd_reloc_overflow)
511 overflow = TRUE;
512 else if (rstat != bfd_reloc_ok)
513 abort ();
514 break;
517 if (overflow)
519 const char *name;
520 char buf[SYMNMLEN + 1];
522 if (symndx == -1)
523 name = "*ABS*";
524 else if (h != NULL)
525 name = NULL;
526 else if (sym == NULL)
527 name = "*unknown*";
528 else if (sym->_n._n_n._n_zeroes == 0
529 && sym->_n._n_n._n_offset != 0)
530 name = obj_coff_strings (input_bfd) + sym->_n._n_n._n_offset;
531 else
533 strncpy (buf, sym->_n._n_name, SYMNMLEN);
534 buf[SYMNMLEN] = '\0';
535 name = buf;
538 if (! ((*info->callbacks->reloc_overflow)
539 (info, (h ? &h->root : NULL), name,
540 howto_table[rel->r_type].name, (bfd_vma) 0, input_bfd,
541 input_section, rel->r_vaddr - input_section->vma)))
542 return FALSE;
546 return TRUE;
549 #define coff_relocate_section coff_or32_relocate_section
551 /* We don't want to change the symndx of a R_IHCONST reloc, since it
552 is actually an addend, not a symbol index at all. */
554 static bfd_boolean
555 coff_or32_adjust_symndx (obfd, info, ibfd, sec, irel, adjustedp)
556 bfd *obfd ATTRIBUTE_UNUSED;
557 struct bfd_link_info *info ATTRIBUTE_UNUSED;
558 bfd *ibfd ATTRIBUTE_UNUSED;
559 asection *sec ATTRIBUTE_UNUSED;
560 struct internal_reloc *irel;
561 bfd_boolean *adjustedp;
563 if (irel->r_type == R_IHCONST)
564 *adjustedp = TRUE;
565 else
566 *adjustedp = FALSE;
567 return TRUE;
570 #define coff_adjust_symndx coff_or32_adjust_symndx
572 #include "coffcode.h"
574 const bfd_target or32coff_big_vec =
576 "coff-or32-big", /* Name. */
577 bfd_target_coff_flavour,
578 BFD_ENDIAN_BIG, /* Data byte order is big. */
579 BFD_ENDIAN_BIG, /* Header byte order is big. */
581 (HAS_RELOC | EXEC_P | /* Object flags. */
582 HAS_LINENO | HAS_DEBUG |
583 HAS_SYMS | HAS_LOCALS | WP_TEXT),
585 (SEC_HAS_CONTENTS | SEC_ALLOC | /* Section flags. */
586 SEC_LOAD | SEC_RELOC |
587 SEC_READONLY ),
588 '_', /* Leading underscore. */
589 '/', /* ar_pad_char. */
590 15, /* ar_max_namelen. */
592 /* Data. */
593 bfd_getb64, bfd_getb_signed_64, bfd_putb64,
594 bfd_getb32, bfd_getb_signed_32, bfd_putb32,
595 bfd_getb16, bfd_getb_signed_16, bfd_putb16,
597 /* Headers. */
598 bfd_getb64, bfd_getb_signed_64, bfd_putb64,
599 bfd_getb32, bfd_getb_signed_32, bfd_putb32,
600 bfd_getb16, bfd_getb_signed_16, bfd_putb16,
603 _bfd_dummy_target,
604 coff_object_p,
605 bfd_generic_archive_p,
606 _bfd_dummy_target
609 bfd_false,
610 coff_mkobject,
611 _bfd_generic_mkarchive,
612 bfd_false
615 bfd_false,
616 coff_write_object_contents,
617 _bfd_write_archive_contents,
618 bfd_false
621 BFD_JUMP_TABLE_GENERIC (coff),
622 BFD_JUMP_TABLE_COPY (coff),
623 BFD_JUMP_TABLE_CORE (_bfd_nocore),
624 BFD_JUMP_TABLE_ARCHIVE (_bfd_archive_coff),
625 BFD_JUMP_TABLE_SYMBOLS (coff),
626 BFD_JUMP_TABLE_RELOCS (coff),
627 BFD_JUMP_TABLE_WRITE (coff),
628 BFD_JUMP_TABLE_LINK (coff),
629 BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),
631 /* Alternative_target. */
632 #ifdef TARGET_LITTLE_SYM
633 & TARGET_LITTLE_SYM,
634 #else
635 NULL,
636 #endif
638 COFF_SWAP_TABLE