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