1 /* BFD back-end for OpenRISC 1000 COFF binaries.
2 Copyright 2002 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
26 #include "coff/or32.h"
27 #include "coff/internal.h"
30 static long get_symbol_value PARAMS ((asymbol *));
31 static bfd_reloc_status_type or1_reloc PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
32 static boolean coff_or1_relocate_section PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *, struct internal_reloc *, struct internal_syment *, asection **));
33 static boolean coff_or1_adjust_symndx PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, struct internal_reloc *, boolean *));
35 #define COFF_DEFAULT_SECTION_ALIGNMENT_POWER (2)
37 #define INSERT_HWORD(WORD,HWORD) \
38 (((WORD) & 0xffff0000) | ((HWORD)& 0x0000ffff))
39 #define EXTRACT_HWORD(WORD) \
41 #define SIGN_EXTEND_HWORD(HWORD) \
42 ((HWORD) & 0x8000 ? (HWORD)|(~0xffffL) : (HWORD))
44 #define INSERT_JUMPTARG(WORD,JT) \
45 (((WORD) & 0xfc000000) | ((JT)& 0x03ffffff))
46 #define EXTRACT_JUMPTARG(WORD) \
48 #define SIGN_EXTEND_JUMPTARG(JT) \
49 ((JT) & 0x04000000 ? (JT)|(~0x03ffffffL) : (JT))
51 /* Provided the symbol, returns the value reffed. */
54 get_symbol_value (symbol)
59 if (bfd_is_com_section (symbol->section))
62 relocation = symbol->value +
63 symbol->section->output_section->vma +
64 symbol->section->output_offset;
69 /* This function is in charge of performing all the or32 relocations. */
71 static bfd_reloc_status_type
72 or32_reloc (abfd, reloc_entry, symbol_in, data, input_section, output_bfd,
78 asection *input_section;
82 /* The consth relocation comes in two parts, we have to remember
83 the state between calls, in these variables. */
84 static boolean part1_consth_active = false;
85 static unsigned long part1_consth_value;
88 unsigned long sym_value;
89 unsigned long unsigned_value;
90 unsigned short r_type;
93 unsigned long addr = reloc_entry->address ; /*+ input_section->vma*/
94 bfd_byte *hit_data =addr + (bfd_byte *)(data);
96 r_type = reloc_entry->howto->type;
100 /* Partial linking - do nothing. */
101 reloc_entry->address += input_section->output_offset;
105 if (symbol_in != NULL
106 && bfd_is_und_section (symbol_in->section))
108 /* Keep the state machine happy in case we're called again. */
109 if (r_type == R_IHIHALF)
111 part1_consth_active = true;
112 part1_consth_value = 0;
115 return bfd_reloc_undefined;
118 if ((part1_consth_active) && (r_type != R_IHCONST))
120 part1_consth_active = false;
121 *error_message = (char *) "Missing IHCONST";
123 return bfd_reloc_dangerous;
126 sym_value = get_symbol_value (symbol_in);
131 insn = bfd_get_32(abfd, hit_data);
133 /* Take the value in the field and sign extend it. */
134 signed_value = EXTRACT_JUMPTARG (insn);
135 signed_value = SIGN_EXTEND_JUMPTARG (signed_value);
138 /* See the note on the R_IREL reloc in coff_or32_relocate_section. */
139 if (signed_value == - (long) reloc_entry->address)
142 signed_value += sym_value + reloc_entry->addend;
144 if ((signed_value & ~0x3ffff) == 0)
145 { /* Absolute jmp/call. */
146 insn |= (1<<24); /* Make it absolute. */
147 /* FIXME: Should we change r_type to R_IABS. */
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 == false)
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 },
252 {1}, {2}, {3}, {4}, {5}, {6}, {7}, {8}, {9}, {10},
253 {11}, {12}, {13}, {14}, {15}, {16}, {17}, {18}, {19}, {20},
255 { R_IREL, 0, 3, 32, true, 0, complain_overflow_signed, or32_reloc, "IREL", true, 0xffffffff,0xffffffff, false },
256 { R_IABS, 0, 3, 32, false, 0, complain_overflow_bitfield, or32_reloc, "IABS", true, 0xffffffff,0xffffffff, false },
257 { R_ILOHALF, 0, 3, 16, true, 0, complain_overflow_signed, or32_reloc, "ILOHALF", true, 0x0000ffff,0x0000ffff, false },
258 { R_IHIHALF, 0, 3, 16, true, 16,complain_overflow_signed, or32_reloc, "IHIHALF", true, 0xffff0000,0xffff0000, false },
259 { R_IHCONST, 0, 3, 16, true, 0, complain_overflow_signed, or32_reloc, "IHCONST", true, 0xffff0000,0xffff0000, false },
260 { R_BYTE, 0, 0, 8, false, 0, complain_overflow_bitfield, or32_reloc, "BYTE", true, 0x000000ff,0x000000ff, false },
261 { R_HWORD, 0, 1, 16, false, 0, complain_overflow_bitfield, or32_reloc, "HWORD", true, 0x0000ffff,0x0000ffff, false },
262 { R_WORD, 0, 2, 32, false, 0, complain_overflow_bitfield, or32_reloc, "WORD", true, 0xffffffff,0xffffffff, false },
265 #define BADMAG(x) OR32BADMAG (x)
267 #define RELOC_PROCESSING(relent, reloc, symbols, abfd, section) \
268 reloc_processing (relent, reloc, symbols, abfd, section)
271 reloc_processing (relent,reloc, symbols, abfd, section)
273 struct internal_reloc *reloc;
278 static bfd_vma ihihalf_vaddr = (bfd_vma) -1;
280 relent->address = reloc->r_vaddr;
281 relent->howto = howto_table + reloc->r_type;
283 if (reloc->r_type == R_IHCONST)
285 /* The address of an R_IHCONST should always be the address of
286 the immediately preceding R_IHIHALF. relocs generated by gas
287 are correct, but relocs generated by High C are different (I
288 can't figure out what the address means for High C). We can
289 handle both gas and High C by ignoring the address here, and
290 simply reusing the address saved for R_IHIHALF. */
291 if (ihihalf_vaddr == (bfd_vma) -1)
294 relent->address = ihihalf_vaddr;
295 ihihalf_vaddr = (bfd_vma) -1;
296 relent->addend = reloc->r_symndx;
297 relent->sym_ptr_ptr= bfd_abs_section_ptr->symbol_ptr_ptr;
302 relent->sym_ptr_ptr = symbols + obj_convert (abfd)[reloc->r_symndx];
304 ptr = *(relent->sym_ptr_ptr);
307 relent->address-= section->vma;
309 if (reloc->r_type == R_IHIHALF)
310 ihihalf_vaddr = relent->address;
311 else if (ihihalf_vaddr != (bfd_vma) -1)
316 /* The reloc processing routine for the optimized COFF linker. */
319 coff_or32_relocate_section (output_bfd, info, input_bfd, input_section,
320 contents, relocs, syms, sections)
322 struct bfd_link_info *info;
324 asection *input_section;
326 struct internal_reloc *relocs;
327 struct internal_syment *syms;
330 struct internal_reloc *rel;
331 struct internal_reloc *relend;
335 /* If we are performing a relocateable link, we don't need to do a
336 thing. The caller will take care of adjusting the reloc
337 addresses and symbol indices. */
338 if (info->relocateable)
345 relend = rel + input_section->reloc_count;
347 for (; rel < relend; rel++)
351 struct coff_link_hash_entry *h;
352 struct internal_syment *sym;
358 unsigned long unsigned_value;
359 bfd_reloc_status_type rstat;
361 symndx = rel->r_symndx;
362 loc = contents + rel->r_vaddr - input_section->vma;
364 if (symndx == -1 || rel->r_type == R_IHCONST)
367 h = obj_coff_sym_hashes (input_bfd)[symndx];
373 /* An R_IHCONST reloc does not have a symbol. Instead, the
374 symbol index is an addend. R_IHCONST is always used in
375 conjunction with R_IHHALF. */
376 if (rel->r_type != R_IHCONST)
381 sec = bfd_abs_section_ptr;
385 sec = sections[symndx];
386 val = (sec->output_section->vma
394 if (h->root.type == bfd_link_hash_defined
395 || h->root.type == bfd_link_hash_defweak)
397 sec = h->root.u.def.section;
398 val = (h->root.u.def.value
399 + sec->output_section->vma
400 + sec->output_offset);
404 if (! ((*info->callbacks->undefined_symbol)
405 (info, h->root.root.string, input_bfd, input_section,
406 rel->r_vaddr - input_section->vma, true)))
413 if (! ((*info->callbacks->reloc_dangerous)
414 (info, "missing IHCONST reloc", input_bfd,
415 input_section, rel->r_vaddr - input_section->vma)))
426 bfd_set_error (bfd_error_bad_value);
430 insn = bfd_get_32 (input_bfd, loc);
432 /* Extract the addend. */
433 signed_value = EXTRACT_JUMPTARG (insn);
434 signed_value = SIGN_EXTEND_JUMPTARG (signed_value);
437 /* Determine the destination of the jump. */
441 if ((signed_value & ~0x3ffff) == 0)
443 /* We can use an absolute jump. */
449 /* Make the destination PC relative. */
450 signed_value -= (input_section->output_section->vma
451 + input_section->output_offset
452 + (rel->r_vaddr - input_section->vma));
453 if (signed_value > 0x7ffffff || signed_value < - 0x8000000)
460 /* Put the adjusted value back into the instruction. */
462 insn = INSERT_JUMPTARG(insn, signed_value);
464 bfd_put_32 (input_bfd, (bfd_vma) insn, loc);
468 insn = bfd_get_32 (input_bfd, loc);
469 unsigned_value = EXTRACT_HWORD (insn);
470 unsigned_value += val;
471 insn = INSERT_HWORD (insn, unsigned_value);
472 bfd_put_32 (input_bfd, insn, loc);
476 /* Save the value for the R_IHCONST reloc. */
484 if (! ((*info->callbacks->reloc_dangerous)
485 (info, "missing IHIHALF reloc", input_bfd,
486 input_section, rel->r_vaddr - input_section->vma)))
491 insn = bfd_get_32 (input_bfd, loc);
492 unsigned_value = rel->r_symndx + hihalf_val;
493 unsigned_value >>= 16;
494 insn = INSERT_HWORD (insn, unsigned_value);
495 bfd_put_32 (input_bfd, (bfd_vma) insn, loc);
503 rstat = _bfd_relocate_contents (howto_table + rel->r_type,
504 input_bfd, val, loc);
505 if (rstat == bfd_reloc_overflow)
507 else if (rstat != bfd_reloc_ok)
515 char buf[SYMNMLEN + 1];
520 name = h->root.root.string;
521 else if (sym == NULL)
523 else if (sym->_n._n_n._n_zeroes == 0
524 && sym->_n._n_n._n_offset != 0)
525 name = obj_coff_strings (input_bfd) + sym->_n._n_n._n_offset;
528 strncpy (buf, sym->_n._n_name, SYMNMLEN);
529 buf[SYMNMLEN] = '\0';
533 if (! ((*info->callbacks->reloc_overflow)
534 (info, name, howto_table[rel->r_type].name, (bfd_vma) 0,
535 input_bfd, input_section,
536 rel->r_vaddr - input_section->vma)))
544 #define coff_relocate_section coff_or32_relocate_section
546 /* We don't want to change the symndx of a R_IHCONST reloc, since it
547 is actually an addend, not a symbol index at all. */
550 coff_or32_adjust_symndx (obfd, info, ibfd, sec, irel, adjustedp)
551 bfd *obfd ATTRIBUTE_UNUSED;
552 struct bfd_link_info *info ATTRIBUTE_UNUSED;
553 bfd *ibfd ATTRIBUTE_UNUSED;
554 asection *sec ATTRIBUTE_UNUSED;
555 struct internal_reloc *irel;
558 if (irel->r_type == R_IHCONST)
565 #define coff_adjust_symndx coff_or32_adjust_symndx
567 #include "coffcode.h"
569 const bfd_target or32coff_big_vec =
571 "coff-or32-big", /* Name. */
572 bfd_target_coff_flavour,
573 BFD_ENDIAN_BIG, /* Data byte order is big. */
574 BFD_ENDIAN_BIG, /* Header byte order is big. */
576 (HAS_RELOC | EXEC_P | /* Object flags. */
577 HAS_LINENO | HAS_DEBUG |
578 HAS_SYMS | HAS_LOCALS | WP_TEXT),
580 (SEC_HAS_CONTENTS | SEC_ALLOC | /* Section flags. */
581 SEC_LOAD | SEC_RELOC |
583 '_', /* Leading underscore. */
584 '/', /* ar_pad_char. */
585 15, /* ar_max_namelen. */
588 bfd_getb64, bfd_getb_signed_64, bfd_putb64,
589 bfd_getb32, bfd_getb_signed_32, bfd_putb32,
590 bfd_getb16, bfd_getb_signed_16, bfd_putb16,
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,
600 bfd_generic_archive_p,
606 _bfd_generic_mkarchive,
611 coff_write_object_contents,
612 _bfd_write_archive_contents,
616 BFD_JUMP_TABLE_GENERIC (coff),
617 BFD_JUMP_TABLE_COPY (coff),
618 BFD_JUMP_TABLE_CORE (_bfd_nocore),
619 BFD_JUMP_TABLE_ARCHIVE (_bfd_archive_coff),
620 BFD_JUMP_TABLE_SYMBOLS (coff),
621 BFD_JUMP_TABLE_RELOCS (coff),
622 BFD_JUMP_TABLE_WRITE (coff),
623 BFD_JUMP_TABLE_LINK (coff),
624 BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),
626 /* Alternative_target. */
627 #ifdef TARGET_LITTLE_SYM