1 /* BFD back-end for OpenRISC 1000 COFF binaries.
2 Copyright 2002, 2003, 2004, 2005 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. */
26 #include "coff/or32.h"
27 #include "coff/internal.h"
30 static long get_symbol_value
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) \
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) \
56 #define SIGN_EXTEND_JUMPTARG(JT) \
57 ((JT) & 0x04000000 ? (JT)|(~0x03ffffffL) : (JT))
59 /* Provided the symbol, returns the value reffed. */
62 get_symbol_value (symbol
)
67 if (bfd_is_com_section (symbol
->section
))
70 relocation
= symbol
->value
+
71 symbol
->section
->output_section
->vma
+
72 symbol
->section
->output_offset
;
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
,
86 asection
*input_section
;
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
;
96 unsigned long sym_value
;
97 unsigned long unsigned_value
;
98 unsigned short r_type
;
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
;
108 /* Partial linking - do nothing. */
109 reloc_entry
->address
+= input_section
->output_offset
;
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
);
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
);
146 /* See the note on the R_IREL reloc in coff_or32_relocate_section. */
147 if (signed_value
== - (long) reloc_entry
->address
)
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
;
160 insn
= INSERT_JUMPTARG (insn
, signed_value
);
161 bfd_put_32 (abfd
, insn
, hit_data
);
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
);
173 insn
= bfd_get_32 (abfd
, hit_data
);
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. */
184 insn
= bfd_get_32 (abfd
, hit_data
);
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
);
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
);
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
);
221 insn
= bfd_get_32 (abfd
, hit_data
);
222 insn
+= sym_value
+ reloc_entry
->addend
;
223 bfd_put_32 (abfd
, insn
, hit_data
);
227 *error_message
= _("Unrecognized reloc");
228 return bfd_reloc_dangerous
;
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
},
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)
290 reloc_processing (relent
,reloc
, symbols
, abfd
, section
)
292 struct internal_reloc
*reloc
;
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)
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
;
320 relent
->sym_ptr_ptr
= symbols
+ obj_convert (abfd
)[reloc
->r_symndx
];
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)
331 /* The reloc processing routine for the optimized COFF linker. */
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
;
339 asection
*input_section
;
341 struct internal_reloc
*relocs
;
342 struct internal_syment
*syms
;
345 struct internal_reloc
*rel
;
346 struct internal_reloc
*relend
;
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
)
360 relend
= rel
+ input_section
->reloc_count
;
362 for (; rel
< relend
; rel
++)
366 struct coff_link_hash_entry
*h
;
367 struct internal_syment
*sym
;
370 bfd_boolean overflow
;
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
)
382 h
= obj_coff_sym_hashes (input_bfd
)[symndx
];
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
)
396 sec
= bfd_abs_section_ptr
;
400 sec
= sections
[symndx
];
401 val
= (sec
->output_section
->vma
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
);
419 if (! ((*info
->callbacks
->undefined_symbol
)
420 (info
, h
->root
.root
.string
, input_bfd
, input_section
,
421 rel
->r_vaddr
- input_section
->vma
, TRUE
)))
428 if (! ((*info
->callbacks
->reloc_dangerous
)
429 (info
, "missing IHCONST reloc", input_bfd
,
430 input_section
, rel
->r_vaddr
- input_section
->vma
)))
441 bfd_set_error (bfd_error_bad_value
);
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
);
452 /* Determine the destination of the jump. */
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)
465 /* Put the adjusted value back into the instruction. */
467 insn
= INSERT_JUMPTARG(insn
, signed_value
);
469 bfd_put_32 (input_bfd
, (bfd_vma
) insn
, loc
);
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
);
481 /* Save the value for the R_IHCONST reloc. */
489 if (! ((*info
->callbacks
->reloc_dangerous
)
490 (info
, "missing IHIHALF reloc", input_bfd
,
491 input_section
, rel
->r_vaddr
- input_section
->vma
)))
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
);
508 rstat
= _bfd_relocate_contents (howto_table
+ rel
->r_type
,
509 input_bfd
, val
, loc
);
510 if (rstat
== bfd_reloc_overflow
)
512 else if (rstat
!= bfd_reloc_ok
)
520 char buf
[SYMNMLEN
+ 1];
526 else if (sym
== NULL
)
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
;
533 strncpy (buf
, sym
->_n
._n_name
, SYMNMLEN
);
534 buf
[SYMNMLEN
] = '\0';
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
)))
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. */
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
)
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
|
588 '_', /* Leading underscore. */
589 '/', /* ar_pad_char. */
590 15, /* ar_max_namelen. */
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
,
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
,
605 bfd_generic_archive_p
,
611 _bfd_generic_mkarchive
,
616 coff_write_object_contents
,
617 _bfd_write_archive_contents
,
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