1 /* BFD back-end for OpenRISC 1000 COFF binaries.
2 Copyright 2002, 2003 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
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
;
152 if ((signed_value
& ~0x3ffff) == 0)
153 { /* Absolute jmp/call. */
154 insn
|= (1<<24); /* Make it absolute. */
155 /* FIXME: Should we change r_type to R_IABS. */
160 /* Relative jmp/call, so subtract from the value the
161 address of the place we're coming from. */
162 signed_value
-= (reloc_entry
->address
163 + input_section
->output_section
->vma
164 + input_section
->output_offset
);
165 if (signed_value
> 0x7ffffff || signed_value
< -0x8000000)
166 return bfd_reloc_overflow
;
169 insn
= INSERT_JUMPTARG (insn
, signed_value
);
170 bfd_put_32 (abfd
, insn
, hit_data
);
174 insn
= bfd_get_32 (abfd
, hit_data
);
175 unsigned_value
= EXTRACT_HWORD (insn
);
176 unsigned_value
+= sym_value
+ reloc_entry
->addend
;
177 insn
= INSERT_HWORD (insn
, unsigned_value
);
178 bfd_put_32 (abfd
, insn
, hit_data
);
182 insn
= bfd_get_32 (abfd
, hit_data
);
185 Just get the symbol value that is referenced. */
186 part1_consth_active
= TRUE
;
187 part1_consth_value
= sym_value
+ reloc_entry
->addend
;
189 /* Don't modify insn until R_IHCONST. */
193 insn
= bfd_get_32 (abfd
, hit_data
);
196 Now relocate the reference. */
197 if (! part1_consth_active
)
199 *error_message
= (char *) "Missing IHIHALF";
200 return bfd_reloc_dangerous
;
203 /* sym_ptr_ptr = r_symndx, in coff_slurp_reloc_table() */
204 unsigned_value
= 0; /*EXTRACT_HWORD(insn) << 16;*/
205 unsigned_value
+= reloc_entry
->addend
; /* r_symndx */
206 unsigned_value
+= part1_consth_value
;
207 unsigned_value
= unsigned_value
>> 16;
208 insn
= INSERT_HWORD (insn
, unsigned_value
);
209 part1_consth_active
= FALSE
;
210 bfd_put_32 (abfd
, insn
, hit_data
);
214 insn
= bfd_get_8 (abfd
, hit_data
);
215 unsigned_value
= insn
+ sym_value
+ reloc_entry
->addend
;
216 if (unsigned_value
& 0xffffff00)
217 return bfd_reloc_overflow
;
218 bfd_put_8 (abfd
, unsigned_value
, hit_data
);
222 insn
= bfd_get_16 (abfd
, hit_data
);
223 unsigned_value
= insn
+ sym_value
+ reloc_entry
->addend
;
224 if (unsigned_value
& 0xffff0000)
225 return bfd_reloc_overflow
;
226 bfd_put_16 (abfd
, insn
, hit_data
);
230 insn
= bfd_get_32 (abfd
, hit_data
);
231 insn
+= sym_value
+ reloc_entry
->addend
;
232 bfd_put_32 (abfd
, insn
, hit_data
);
236 *error_message
= _("Unrecognized reloc");
237 return bfd_reloc_dangerous
;
256 /* FIXME: I'm not real sure about this table. */
257 static reloc_howto_type howto_table
[] =
259 { R_ABS
, 0, 3, 32, FALSE
, 0, complain_overflow_bitfield
, or32_reloc
, "ABS", TRUE
, 0xffffffff,0xffffffff, FALSE
},
283 { R_IREL
, 0, 3, 32, TRUE
, 0, complain_overflow_signed
, or32_reloc
, "IREL", TRUE
, 0xffffffff,0xffffffff, FALSE
},
284 { R_IABS
, 0, 3, 32, FALSE
, 0, complain_overflow_bitfield
, or32_reloc
, "IABS", TRUE
, 0xffffffff,0xffffffff, FALSE
},
285 { R_ILOHALF
, 0, 3, 16, TRUE
, 0, complain_overflow_signed
, or32_reloc
, "ILOHALF", TRUE
, 0x0000ffff,0x0000ffff, FALSE
},
286 { R_IHIHALF
, 0, 3, 16, TRUE
, 16,complain_overflow_signed
, or32_reloc
, "IHIHALF", TRUE
, 0xffff0000,0xffff0000, FALSE
},
287 { R_IHCONST
, 0, 3, 16, TRUE
, 0, complain_overflow_signed
, or32_reloc
, "IHCONST", TRUE
, 0xffff0000,0xffff0000, FALSE
},
288 { R_BYTE
, 0, 0, 8, FALSE
, 0, complain_overflow_bitfield
, or32_reloc
, "BYTE", TRUE
, 0x000000ff,0x000000ff, FALSE
},
289 { R_HWORD
, 0, 1, 16, FALSE
, 0, complain_overflow_bitfield
, or32_reloc
, "HWORD", TRUE
, 0x0000ffff,0x0000ffff, FALSE
},
290 { R_WORD
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
, or32_reloc
, "WORD", TRUE
, 0xffffffff,0xffffffff, FALSE
},
293 #define BADMAG(x) OR32BADMAG (x)
295 #define RELOC_PROCESSING(relent, reloc, symbols, abfd, section) \
296 reloc_processing (relent, reloc, symbols, abfd, section)
299 reloc_processing (relent
,reloc
, symbols
, abfd
, section
)
301 struct internal_reloc
*reloc
;
306 static bfd_vma ihihalf_vaddr
= (bfd_vma
) -1;
308 relent
->address
= reloc
->r_vaddr
;
309 relent
->howto
= howto_table
+ reloc
->r_type
;
311 if (reloc
->r_type
== R_IHCONST
)
313 /* The address of an R_IHCONST should always be the address of
314 the immediately preceding R_IHIHALF. relocs generated by gas
315 are correct, but relocs generated by High C are different (I
316 can't figure out what the address means for High C). We can
317 handle both gas and High C by ignoring the address here, and
318 simply reusing the address saved for R_IHIHALF. */
319 if (ihihalf_vaddr
== (bfd_vma
) -1)
322 relent
->address
= ihihalf_vaddr
;
323 ihihalf_vaddr
= (bfd_vma
) -1;
324 relent
->addend
= reloc
->r_symndx
;
325 relent
->sym_ptr_ptr
= bfd_abs_section_ptr
->symbol_ptr_ptr
;
330 relent
->sym_ptr_ptr
= symbols
+ obj_convert (abfd
)[reloc
->r_symndx
];
332 ptr
= *(relent
->sym_ptr_ptr
);
335 relent
->address
-= section
->vma
;
337 if (reloc
->r_type
== R_IHIHALF
)
338 ihihalf_vaddr
= relent
->address
;
339 else if (ihihalf_vaddr
!= (bfd_vma
) -1)
344 /* The reloc processing routine for the optimized COFF linker. */
347 coff_or32_relocate_section (output_bfd
, info
, input_bfd
, input_section
,
348 contents
, relocs
, syms
, sections
)
349 bfd
*output_bfd ATTRIBUTE_UNUSED
;
350 struct bfd_link_info
*info
;
352 asection
*input_section
;
354 struct internal_reloc
*relocs
;
355 struct internal_syment
*syms
;
358 struct internal_reloc
*rel
;
359 struct internal_reloc
*relend
;
363 /* If we are performing a relocatable link, we don't need to do a
364 thing. The caller will take care of adjusting the reloc
365 addresses and symbol indices. */
366 if (info
->relocatable
)
373 relend
= rel
+ input_section
->reloc_count
;
375 for (; rel
< relend
; rel
++)
379 struct coff_link_hash_entry
*h
;
380 struct internal_syment
*sym
;
383 bfd_boolean overflow
;
386 unsigned long unsigned_value
;
387 bfd_reloc_status_type rstat
;
389 symndx
= rel
->r_symndx
;
390 loc
= contents
+ rel
->r_vaddr
- input_section
->vma
;
392 if (symndx
== -1 || rel
->r_type
== R_IHCONST
)
395 h
= obj_coff_sym_hashes (input_bfd
)[symndx
];
401 /* An R_IHCONST reloc does not have a symbol. Instead, the
402 symbol index is an addend. R_IHCONST is always used in
403 conjunction with R_IHHALF. */
404 if (rel
->r_type
!= R_IHCONST
)
409 sec
= bfd_abs_section_ptr
;
413 sec
= sections
[symndx
];
414 val
= (sec
->output_section
->vma
422 if (h
->root
.type
== bfd_link_hash_defined
423 || h
->root
.type
== bfd_link_hash_defweak
)
425 sec
= h
->root
.u
.def
.section
;
426 val
= (h
->root
.u
.def
.value
427 + sec
->output_section
->vma
428 + sec
->output_offset
);
432 if (! ((*info
->callbacks
->undefined_symbol
)
433 (info
, h
->root
.root
.string
, input_bfd
, input_section
,
434 rel
->r_vaddr
- input_section
->vma
, TRUE
)))
441 if (! ((*info
->callbacks
->reloc_dangerous
)
442 (info
, "missing IHCONST reloc", input_bfd
,
443 input_section
, rel
->r_vaddr
- input_section
->vma
)))
454 bfd_set_error (bfd_error_bad_value
);
458 insn
= bfd_get_32 (input_bfd
, loc
);
460 /* Extract the addend. */
461 signed_value
= EXTRACT_JUMPTARG (insn
);
462 signed_value
= SIGN_EXTEND_JUMPTARG (signed_value
);
465 /* Determine the destination of the jump. */
469 if ((signed_value
& ~0x3ffff) == 0)
471 /* We can use an absolute jump. */
477 /* Make the destination PC relative. */
478 signed_value
-= (input_section
->output_section
->vma
479 + input_section
->output_offset
480 + (rel
->r_vaddr
- input_section
->vma
));
481 if (signed_value
> 0x7ffffff || signed_value
< - 0x8000000)
488 /* Put the adjusted value back into the instruction. */
490 insn
= INSERT_JUMPTARG(insn
, signed_value
);
492 bfd_put_32 (input_bfd
, (bfd_vma
) insn
, loc
);
496 insn
= bfd_get_32 (input_bfd
, loc
);
497 unsigned_value
= EXTRACT_HWORD (insn
);
498 unsigned_value
+= val
;
499 insn
= INSERT_HWORD (insn
, unsigned_value
);
500 bfd_put_32 (input_bfd
, insn
, loc
);
504 /* Save the value for the R_IHCONST reloc. */
512 if (! ((*info
->callbacks
->reloc_dangerous
)
513 (info
, "missing IHIHALF reloc", input_bfd
,
514 input_section
, rel
->r_vaddr
- input_section
->vma
)))
519 insn
= bfd_get_32 (input_bfd
, loc
);
520 unsigned_value
= rel
->r_symndx
+ hihalf_val
;
521 unsigned_value
>>= 16;
522 insn
= INSERT_HWORD (insn
, unsigned_value
);
523 bfd_put_32 (input_bfd
, (bfd_vma
) insn
, loc
);
531 rstat
= _bfd_relocate_contents (howto_table
+ rel
->r_type
,
532 input_bfd
, val
, loc
);
533 if (rstat
== bfd_reloc_overflow
)
535 else if (rstat
!= bfd_reloc_ok
)
543 char buf
[SYMNMLEN
+ 1];
548 name
= h
->root
.root
.string
;
549 else if (sym
== NULL
)
551 else if (sym
->_n
._n_n
._n_zeroes
== 0
552 && sym
->_n
._n_n
._n_offset
!= 0)
553 name
= obj_coff_strings (input_bfd
) + sym
->_n
._n_n
._n_offset
;
556 strncpy (buf
, sym
->_n
._n_name
, SYMNMLEN
);
557 buf
[SYMNMLEN
] = '\0';
561 if (! ((*info
->callbacks
->reloc_overflow
)
562 (info
, name
, howto_table
[rel
->r_type
].name
, (bfd_vma
) 0,
563 input_bfd
, input_section
,
564 rel
->r_vaddr
- input_section
->vma
)))
572 #define coff_relocate_section coff_or32_relocate_section
574 /* We don't want to change the symndx of a R_IHCONST reloc, since it
575 is actually an addend, not a symbol index at all. */
578 coff_or32_adjust_symndx (obfd
, info
, ibfd
, sec
, irel
, adjustedp
)
579 bfd
*obfd ATTRIBUTE_UNUSED
;
580 struct bfd_link_info
*info ATTRIBUTE_UNUSED
;
581 bfd
*ibfd ATTRIBUTE_UNUSED
;
582 asection
*sec ATTRIBUTE_UNUSED
;
583 struct internal_reloc
*irel
;
584 bfd_boolean
*adjustedp
;
586 if (irel
->r_type
== R_IHCONST
)
593 #define coff_adjust_symndx coff_or32_adjust_symndx
595 #include "coffcode.h"
597 const bfd_target or32coff_big_vec
=
599 "coff-or32-big", /* Name. */
600 bfd_target_coff_flavour
,
601 BFD_ENDIAN_BIG
, /* Data byte order is big. */
602 BFD_ENDIAN_BIG
, /* Header byte order is big. */
604 (HAS_RELOC
| EXEC_P
| /* Object flags. */
605 HAS_LINENO
| HAS_DEBUG
|
606 HAS_SYMS
| HAS_LOCALS
| WP_TEXT
),
608 (SEC_HAS_CONTENTS
| SEC_ALLOC
| /* Section flags. */
609 SEC_LOAD
| SEC_RELOC
|
611 '_', /* Leading underscore. */
612 '/', /* ar_pad_char. */
613 15, /* ar_max_namelen. */
616 bfd_getb64
, bfd_getb_signed_64
, bfd_putb64
,
617 bfd_getb32
, bfd_getb_signed_32
, bfd_putb32
,
618 bfd_getb16
, bfd_getb_signed_16
, bfd_putb16
,
621 bfd_getb64
, bfd_getb_signed_64
, bfd_putb64
,
622 bfd_getb32
, bfd_getb_signed_32
, bfd_putb32
,
623 bfd_getb16
, bfd_getb_signed_16
, bfd_putb16
,
628 bfd_generic_archive_p
,
634 _bfd_generic_mkarchive
,
639 coff_write_object_contents
,
640 _bfd_write_archive_contents
,
644 BFD_JUMP_TABLE_GENERIC (coff
),
645 BFD_JUMP_TABLE_COPY (coff
),
646 BFD_JUMP_TABLE_CORE (_bfd_nocore
),
647 BFD_JUMP_TABLE_ARCHIVE (_bfd_archive_coff
),
648 BFD_JUMP_TABLE_SYMBOLS (coff
),
649 BFD_JUMP_TABLE_RELOCS (coff
),
650 BFD_JUMP_TABLE_WRITE (coff
),
651 BFD_JUMP_TABLE_LINK (coff
),
652 BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic
),
654 /* Alternative_target. */
655 #ifdef TARGET_LITTLE_SYM