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