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 3 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,
20 MA 02110-1301, USA. */
27 #include "coff/or32.h"
28 #include "coff/internal.h"
31 static long get_symbol_value
33 static bfd_reloc_status_type or32_reloc
34 PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
35 static bfd_boolean coff_or32_relocate_section
36 PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *,
37 struct internal_reloc *, struct internal_syment *, asection **));
38 static bfd_boolean coff_or32_adjust_symndx
39 PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *,
40 struct internal_reloc *, bfd_boolean *));
41 static void reloc_processing
42 PARAMS ((arelent *, struct internal_reloc *, asymbol **, bfd *, asection *));
44 #define COFF_DEFAULT_SECTION_ALIGNMENT_POWER (2)
46 #define INSERT_HWORD(WORD,HWORD) \
47 (((WORD) & 0xffff0000) | ((HWORD)& 0x0000ffff))
48 #define EXTRACT_HWORD(WORD) \
50 #define SIGN_EXTEND_HWORD(HWORD) \
51 ((HWORD) & 0x8000 ? (HWORD)|(~0xffffL) : (HWORD))
53 #define INSERT_JUMPTARG(WORD,JT) \
54 (((WORD) & 0xfc000000) | ((JT)& 0x03ffffff))
55 #define EXTRACT_JUMPTARG(WORD) \
57 #define SIGN_EXTEND_JUMPTARG(JT) \
58 ((JT) & 0x04000000 ? (JT)|(~0x03ffffffL) : (JT))
60 /* Provided the symbol, returns the value reffed. */
63 get_symbol_value (symbol)
68 if (bfd_is_com_section (symbol->section))
71 relocation = symbol->value +
72 symbol->section->output_section->vma +
73 symbol->section->output_offset;
78 /* This function is in charge of performing all the or32 relocations. */
80 static bfd_reloc_status_type
81 or32_reloc (abfd, reloc_entry, symbol_in, data, input_section, output_bfd,
87 asection *input_section;
91 /* The consth relocation comes in two parts, we have to remember
92 the state between calls, in these variables. */
93 static bfd_boolean part1_consth_active = FALSE;
94 static unsigned long part1_consth_value;
97 unsigned long sym_value;
98 unsigned long unsigned_value;
99 unsigned short r_type;
102 unsigned long addr = reloc_entry->address ; /*+ input_section->vma*/
103 bfd_byte *hit_data =addr + (bfd_byte *)(data);
105 r_type = reloc_entry->howto->type;
109 /* Partial linking - do nothing. */
110 reloc_entry->address += input_section->output_offset;
114 if (symbol_in != NULL
115 && bfd_is_und_section (symbol_in->section))
117 /* Keep the state machine happy in case we're called again. */
118 if (r_type == R_IHIHALF)
120 part1_consth_active = TRUE;
121 part1_consth_value = 0;
124 return bfd_reloc_undefined;
127 if ((part1_consth_active) && (r_type != R_IHCONST))
129 part1_consth_active = FALSE;
130 *error_message = (char *) "Missing IHCONST";
132 return bfd_reloc_dangerous;
135 sym_value = get_symbol_value (symbol_in);
140 insn = bfd_get_32(abfd, hit_data);
142 /* Take the value in the field and sign extend it. */
143 signed_value = EXTRACT_JUMPTARG (insn);
144 signed_value = SIGN_EXTEND_JUMPTARG (signed_value);
147 /* See the note on the R_IREL reloc in coff_or32_relocate_section. */
148 if (signed_value == - (long) reloc_entry->address)
151 signed_value += sym_value + reloc_entry->addend;
152 /* Relative jmp/call, so subtract from the value the
153 address of the place we're coming from. */
154 signed_value -= (reloc_entry->address
155 + input_section->output_section->vma
156 + input_section->output_offset);
157 if (signed_value > 0x7ffffff || signed_value < -0x8000000)
158 return bfd_reloc_overflow;
161 insn = INSERT_JUMPTARG (insn, signed_value);
162 bfd_put_32 (abfd, insn, hit_data);
166 insn = bfd_get_32 (abfd, hit_data);
167 unsigned_value = EXTRACT_HWORD (insn);
168 unsigned_value += sym_value + reloc_entry->addend;
169 insn = INSERT_HWORD (insn, unsigned_value);
170 bfd_put_32 (abfd, insn, hit_data);
174 insn = bfd_get_32 (abfd, hit_data);
177 Just get the symbol value that is referenced. */
178 part1_consth_active = TRUE;
179 part1_consth_value = sym_value + reloc_entry->addend;
181 /* Don't modify insn until R_IHCONST. */
185 insn = bfd_get_32 (abfd, hit_data);
188 Now relocate the reference. */
189 if (! part1_consth_active)
191 *error_message = (char *) "Missing IHIHALF";
192 return bfd_reloc_dangerous;
195 /* sym_ptr_ptr = r_symndx, in coff_slurp_reloc_table() */
196 unsigned_value = 0; /*EXTRACT_HWORD(insn) << 16;*/
197 unsigned_value += reloc_entry->addend; /* r_symndx */
198 unsigned_value += part1_consth_value;
199 unsigned_value = unsigned_value >> 16;
200 insn = INSERT_HWORD (insn, unsigned_value);
201 part1_consth_active = FALSE;
202 bfd_put_32 (abfd, insn, hit_data);
206 insn = bfd_get_8 (abfd, hit_data);
207 unsigned_value = insn + sym_value + reloc_entry->addend;
208 if (unsigned_value & 0xffffff00)
209 return bfd_reloc_overflow;
210 bfd_put_8 (abfd, unsigned_value, hit_data);
214 insn = bfd_get_16 (abfd, hit_data);
215 unsigned_value = insn + sym_value + reloc_entry->addend;
216 if (unsigned_value & 0xffff0000)
217 return bfd_reloc_overflow;
218 bfd_put_16 (abfd, insn, hit_data);
222 insn = bfd_get_32 (abfd, hit_data);
223 insn += sym_value + reloc_entry->addend;
224 bfd_put_32 (abfd, insn, hit_data);
228 *error_message = _("Unrecognized reloc");
229 return bfd_reloc_dangerous;
248 /* FIXME: I'm not real sure about this table. */
249 static reloc_howto_type howto_table[] =
251 { R_ABS, 0, 3, 32, FALSE, 0, complain_overflow_bitfield, or32_reloc, "ABS", TRUE, 0xffffffff,0xffffffff, FALSE },
275 { R_IREL, 0, 3, 32, TRUE, 0, complain_overflow_signed, or32_reloc, "IREL", TRUE, 0xffffffff,0xffffffff, FALSE },
276 { R_IABS, 0, 3, 32, FALSE, 0, complain_overflow_bitfield, or32_reloc, "IABS", TRUE, 0xffffffff,0xffffffff, FALSE },
277 { R_ILOHALF, 0, 3, 16, TRUE, 0, complain_overflow_signed, or32_reloc, "ILOHALF", TRUE, 0x0000ffff,0x0000ffff, FALSE },
278 { R_IHIHALF, 0, 3, 16, TRUE, 16,complain_overflow_signed, or32_reloc, "IHIHALF", TRUE, 0xffff0000,0xffff0000, FALSE },
279 { R_IHCONST, 0, 3, 16, TRUE, 0, complain_overflow_signed, or32_reloc, "IHCONST", TRUE, 0xffff0000,0xffff0000, FALSE },
280 { R_BYTE, 0, 0, 8, FALSE, 0, complain_overflow_bitfield, or32_reloc, "BYTE", TRUE, 0x000000ff,0x000000ff, FALSE },
281 { R_HWORD, 0, 1, 16, FALSE, 0, complain_overflow_bitfield, or32_reloc, "HWORD", TRUE, 0x0000ffff,0x0000ffff, FALSE },
282 { R_WORD, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, or32_reloc, "WORD", TRUE, 0xffffffff,0xffffffff, FALSE },
285 #define BADMAG(x) OR32BADMAG (x)
287 #define RELOC_PROCESSING(relent, reloc, symbols, abfd, section) \
288 reloc_processing (relent, reloc, symbols, abfd, section)
291 reloc_processing (relent,reloc, symbols, abfd, section)
293 struct internal_reloc *reloc;
298 static bfd_vma ihihalf_vaddr = (bfd_vma) -1;
300 relent->address = reloc->r_vaddr;
301 relent->howto = howto_table + reloc->r_type;
303 if (reloc->r_type == R_IHCONST)
305 /* The address of an R_IHCONST should always be the address of
306 the immediately preceding R_IHIHALF. relocs generated by gas
307 are correct, but relocs generated by High C are different (I
308 can't figure out what the address means for High C). We can
309 handle both gas and High C by ignoring the address here, and
310 simply reusing the address saved for R_IHIHALF. */
311 if (ihihalf_vaddr == (bfd_vma) -1)
314 relent->address = ihihalf_vaddr;
315 ihihalf_vaddr = (bfd_vma) -1;
316 relent->addend = reloc->r_symndx;
317 relent->sym_ptr_ptr= bfd_abs_section_ptr->symbol_ptr_ptr;
321 relent->sym_ptr_ptr = symbols + obj_convert (abfd)[reloc->r_symndx];
323 relent->address-= section->vma;
325 if (reloc->r_type == R_IHIHALF)
326 ihihalf_vaddr = relent->address;
327 else if (ihihalf_vaddr != (bfd_vma) -1)
332 /* The reloc processing routine for the optimized COFF linker. */
335 coff_or32_relocate_section (output_bfd, info, input_bfd, input_section,
336 contents, relocs, syms, sections)
337 bfd *output_bfd ATTRIBUTE_UNUSED;
338 struct bfd_link_info *info;
340 asection *input_section;
342 struct internal_reloc *relocs;
343 struct internal_syment *syms;
346 struct internal_reloc *rel;
347 struct internal_reloc *relend;
351 /* If we are performing a relocatable link, we don't need to do a
352 thing. The caller will take care of adjusting the reloc
353 addresses and symbol indices. */
354 if (info->relocatable)
361 relend = rel + input_section->reloc_count;
363 for (; rel < relend; rel++)
367 struct coff_link_hash_entry *h;
368 struct internal_syment *sym;
371 bfd_boolean overflow;
374 unsigned long unsigned_value;
375 bfd_reloc_status_type rstat;
377 symndx = rel->r_symndx;
378 loc = contents + rel->r_vaddr - input_section->vma;
380 if (symndx == -1 || rel->r_type == R_IHCONST)
383 h = obj_coff_sym_hashes (input_bfd)[symndx];
389 /* An R_IHCONST reloc does not have a symbol. Instead, the
390 symbol index is an addend. R_IHCONST is always used in
391 conjunction with R_IHHALF. */
392 if (rel->r_type != R_IHCONST)
397 sec = bfd_abs_section_ptr;
401 sec = sections[symndx];
402 val = (sec->output_section->vma
410 if (h->root.type == bfd_link_hash_defined
411 || h->root.type == bfd_link_hash_defweak)
413 sec = h->root.u.def.section;
414 val = (h->root.u.def.value
415 + sec->output_section->vma
416 + sec->output_offset);
420 if (! ((*info->callbacks->undefined_symbol)
421 (info, h->root.root.string, input_bfd, input_section,
422 rel->r_vaddr - input_section->vma, TRUE)))
429 if (! ((*info->callbacks->reloc_dangerous)
430 (info, "missing IHCONST reloc", input_bfd,
431 input_section, rel->r_vaddr - input_section->vma)))
442 bfd_set_error (bfd_error_bad_value);
446 insn = bfd_get_32 (input_bfd, loc);
448 /* Extract the addend. */
449 signed_value = EXTRACT_JUMPTARG (insn);
450 signed_value = SIGN_EXTEND_JUMPTARG (signed_value);
453 /* Determine the destination of the jump. */
456 /* Make the destination PC relative. */
457 signed_value -= (input_section->output_section->vma
458 + input_section->output_offset
459 + (rel->r_vaddr - input_section->vma));
460 if (signed_value > 0x7ffffff || signed_value < - 0x8000000)
466 /* Put the adjusted value back into the instruction. */
468 insn = INSERT_JUMPTARG(insn, signed_value);
470 bfd_put_32 (input_bfd, (bfd_vma) insn, loc);
474 insn = bfd_get_32 (input_bfd, loc);
475 unsigned_value = EXTRACT_HWORD (insn);
476 unsigned_value += val;
477 insn = INSERT_HWORD (insn, unsigned_value);
478 bfd_put_32 (input_bfd, insn, loc);
482 /* Save the value for the R_IHCONST reloc. */
490 if (! ((*info->callbacks->reloc_dangerous)
491 (info, "missing IHIHALF reloc", input_bfd,
492 input_section, rel->r_vaddr - input_section->vma)))
497 insn = bfd_get_32 (input_bfd, loc);
498 unsigned_value = rel->r_symndx + hihalf_val;
499 unsigned_value >>= 16;
500 insn = INSERT_HWORD (insn, unsigned_value);
501 bfd_put_32 (input_bfd, (bfd_vma) insn, loc);
509 rstat = _bfd_relocate_contents (howto_table + rel->r_type,
510 input_bfd, val, loc);
511 if (rstat == bfd_reloc_overflow)
513 else if (rstat != bfd_reloc_ok)
521 char buf[SYMNMLEN + 1];
527 else if (sym == NULL)
529 else if (sym->_n._n_n._n_zeroes == 0
530 && sym->_n._n_n._n_offset != 0)
531 name = obj_coff_strings (input_bfd) + sym->_n._n_n._n_offset;
534 strncpy (buf, sym->_n._n_name, SYMNMLEN);
535 buf[SYMNMLEN] = '\0';
539 if (! ((*info->callbacks->reloc_overflow)
540 (info, (h ? &h->root : NULL), name,
541 howto_table[rel->r_type].name, (bfd_vma) 0, input_bfd,
542 input_section, rel->r_vaddr - input_section->vma)))
550 #define coff_relocate_section coff_or32_relocate_section
552 /* We don't want to change the symndx of a R_IHCONST reloc, since it
553 is actually an addend, not a symbol index at all. */
556 coff_or32_adjust_symndx (obfd, info, ibfd, sec, irel, adjustedp)
557 bfd *obfd ATTRIBUTE_UNUSED;
558 struct bfd_link_info *info ATTRIBUTE_UNUSED;
559 bfd *ibfd ATTRIBUTE_UNUSED;
560 asection *sec ATTRIBUTE_UNUSED;
561 struct internal_reloc *irel;
562 bfd_boolean *adjustedp;
564 if (irel->r_type == R_IHCONST)
571 #define coff_adjust_symndx coff_or32_adjust_symndx
573 #include "coffcode.h"
575 const bfd_target or32coff_big_vec =
577 "coff-or32-big", /* Name. */
578 bfd_target_coff_flavour,
579 BFD_ENDIAN_BIG, /* Data byte order is big. */
580 BFD_ENDIAN_BIG, /* Header byte order is big. */
582 (HAS_RELOC | EXEC_P | /* Object flags. */
583 HAS_LINENO | HAS_DEBUG |
584 HAS_SYMS | HAS_LOCALS | WP_TEXT),
586 (SEC_HAS_CONTENTS | SEC_ALLOC | /* Section flags. */
587 SEC_LOAD | SEC_RELOC |
589 '_', /* Leading underscore. */
590 '/', /* ar_pad_char. */
591 15, /* ar_max_namelen. */
594 bfd_getb64, bfd_getb_signed_64, bfd_putb64,
595 bfd_getb32, bfd_getb_signed_32, bfd_putb32,
596 bfd_getb16, bfd_getb_signed_16, bfd_putb16,
599 bfd_getb64, bfd_getb_signed_64, bfd_putb64,
600 bfd_getb32, bfd_getb_signed_32, bfd_putb32,
601 bfd_getb16, bfd_getb_signed_16, bfd_putb16,
606 bfd_generic_archive_p,
612 _bfd_generic_mkarchive,
617 coff_write_object_contents,
618 _bfd_write_archive_contents,
622 BFD_JUMP_TABLE_GENERIC (coff),
623 BFD_JUMP_TABLE_COPY (coff),
624 BFD_JUMP_TABLE_CORE (_bfd_nocore),
625 BFD_JUMP_TABLE_ARCHIVE (_bfd_archive_coff),
626 BFD_JUMP_TABLE_SYMBOLS (coff),
627 BFD_JUMP_TABLE_RELOCS (coff),
628 BFD_JUMP_TABLE_WRITE (coff),
629 BFD_JUMP_TABLE_LINK (coff),
630 BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),
632 /* Alternative_target. */
633 #ifdef TARGET_LITTLE_SYM