1 /* BFD back-end for raw ARM a.out binaries.
2 Copyright 1994, 1995, 1997, 1998, 1999, 2000, 2001, 2002
3 Free Software Foundation, Inc.
4 Contributed by Richard Earnshaw (rwe@pegasus.esprit.ec.org)
6 This file is part of BFD, the Binary File Descriptor library.
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
25 /* Avoid multiple defininitions from aoutx if supporting standarad a.out
26 as well as our own. */
27 /* Do not "beautify" the CONCAT* macro args. Traditional C will not
28 remove whitespace added here, and thus will fail to concatenate
30 #define NAME(x,y) CONCAT3 (aoutarm,_32_,y)
32 #define N_TXTADDR(x) \
33 ((N_MAGIC (x) == NMAGIC) \
35 : ((N_MAGIC (x) != ZMAGIC) \
37 : ((N_SHARED_LIB (x)) \
38 ? ((x).a_entry & ~(bfd_vma) (TARGET_PAGE_SIZE - 1)) \
39 : (bfd_vma) TEXT_START_ADDR)))
41 #define TEXT_START_ADDR 0x8000
42 #define TARGET_PAGE_SIZE 0x8000
43 #define SEGMENT_SIZE TARGET_PAGE_SIZE
44 #define DEFAULT_ARCH bfd_arch_arm
46 #define MY(OP) CONCAT2 (aoutarm_,OP)
47 #define N_BADMAG(x) ((((x).a_info & ~007200) != ZMAGIC) && \
48 (((x).a_info & ~006000) != OMAGIC) && \
49 ((x).a_info != NMAGIC))
50 #define N_MAGIC(x) ((x).a_info & ~07200)
52 #define MY_bfd_reloc_type_lookup aoutarm_bfd_reloc_type_lookup
55 #include "aout/aout64.h"
57 static bfd_boolean
MY(write_object_contents
)
59 static bfd_reloc_status_type
MY(fix_pcrel_26_done
)
60 PARAMS ((bfd
*, arelent
*, asymbol
*, PTR
, asection
*, bfd
*, char **));
61 static bfd_reloc_status_type
MY(fix_pcrel_26
)
62 PARAMS ((bfd
*, arelent
*, asymbol
*, PTR
, asection
*, bfd
*, char **));
63 static void MY(swap_std_reloc_in
)
64 PARAMS ((bfd
*, struct reloc_std_external
*, arelent
*, asymbol
**,
66 reloc_howto_type
*MY(bfd_reloc_type_lookup
)
67 PARAMS ((bfd
*, bfd_reloc_code_real_type
));
68 reloc_howto_type
* MY(reloc_howto
)
69 PARAMS ((bfd
*, struct reloc_std_external
*, int *, int *, int *));
71 PARAMS ((bfd
*, int, int, bfd_vma
, reloc_howto_type
*,
72 struct reloc_std_external
*));
73 void MY(relocatable_reloc
)
74 PARAMS ((reloc_howto_type
*, bfd
*, struct reloc_std_external
*, bfd_vma
*,
76 void MY(swap_std_reloc_out
)
77 PARAMS ((bfd
*, arelent
*, struct reloc_std_external
*));
79 reloc_howto_type
MY(howto_table
)[] =
81 /* Type rs size bsz pcrel bitpos ovrf sf name part_inpl
82 readmask setmask pcdone. */
83 HOWTO (0, 0, 0, 8, FALSE
, 0, complain_overflow_bitfield
, 0, "8", TRUE
,
84 0x000000ff, 0x000000ff, FALSE
),
85 HOWTO (1, 0, 1, 16, FALSE
, 0, complain_overflow_bitfield
, 0, "16", TRUE
,
86 0x0000ffff, 0x0000ffff, FALSE
),
87 HOWTO (2, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
, 0, "32", TRUE
,
88 0xffffffff, 0xffffffff, FALSE
),
89 HOWTO (3, 2, 2, 26, TRUE
, 0, complain_overflow_signed
, MY(fix_pcrel_26
),
90 "ARM26", TRUE
, 0x00ffffff, 0x00ffffff, TRUE
),
91 HOWTO (4, 0, 0, 8, TRUE
, 0, complain_overflow_signed
, 0, "DISP8", TRUE
,
92 0x000000ff, 0x000000ff, TRUE
),
93 HOWTO (5, 0, 1, 16, TRUE
, 0, complain_overflow_signed
, 0, "DISP16", TRUE
,
94 0x0000ffff, 0x0000ffff, TRUE
),
95 HOWTO (6, 0, 2, 32, TRUE
, 0, complain_overflow_signed
, 0, "DISP32", TRUE
,
96 0xffffffff, 0xffffffff, TRUE
),
97 HOWTO (7, 2, 2, 26, FALSE
, 0, complain_overflow_signed
,
98 MY(fix_pcrel_26_done
), "ARM26D", TRUE
, 0x0, 0x0,
101 HOWTO (9, 0, -1, 16, FALSE
, 0, complain_overflow_bitfield
, 0, "NEG16", TRUE
,
102 0x0000ffff, 0x0000ffff, FALSE
),
103 HOWTO (10, 0, -2, 32, FALSE
, 0, complain_overflow_bitfield
, 0, "NEG32", TRUE
,
104 0xffffffff, 0xffffffff, FALSE
)
107 #define RELOC_ARM_BITS_NEG_BIG ((unsigned int) 0x08)
108 #define RELOC_ARM_BITS_NEG_LITTLE ((unsigned int) 0x10)
111 MY(reloc_howto
) (abfd
, rel
, r_index
, r_extern
, r_pcrel
)
113 struct reloc_std_external
*rel
;
118 unsigned int r_length
;
119 unsigned int r_pcrel_done
;
124 if (bfd_header_big_endian (abfd
))
126 *r_index
= ((rel
->r_index
[0] << 16)
127 | (rel
->r_index
[1] << 8)
129 *r_extern
= (0 != (rel
->r_type
[0] & RELOC_STD_BITS_EXTERN_BIG
));
130 r_pcrel_done
= (0 != (rel
->r_type
[0] & RELOC_STD_BITS_PCREL_BIG
));
131 r_neg
= (0 != (rel
->r_type
[0] & RELOC_ARM_BITS_NEG_BIG
));
132 r_length
= ((rel
->r_type
[0] & RELOC_STD_BITS_LENGTH_BIG
)
133 >> RELOC_STD_BITS_LENGTH_SH_BIG
);
137 *r_index
= ((rel
->r_index
[2] << 16)
138 | (rel
->r_index
[1] << 8)
140 *r_extern
= (0 != (rel
->r_type
[0] & RELOC_STD_BITS_EXTERN_LITTLE
));
141 r_pcrel_done
= (0 != (rel
->r_type
[0] & RELOC_STD_BITS_PCREL_LITTLE
));
142 r_neg
= (0 != (rel
->r_type
[0] & RELOC_ARM_BITS_NEG_LITTLE
));
143 r_length
= ((rel
->r_type
[0] & RELOC_STD_BITS_LENGTH_LITTLE
)
144 >> RELOC_STD_BITS_LENGTH_SH_LITTLE
);
146 index
= r_length
+ 4 * r_pcrel_done
+ 8 * r_neg
;
150 return MY(howto_table
) + index
;
153 #define MY_reloc_howto(BFD, REL, IN, EX, PC) \
154 MY(reloc_howto) (BFD, REL, &IN, &EX, &PC)
157 MY(put_reloc
) (abfd
, r_extern
, r_index
, value
, howto
, reloc
)
162 reloc_howto_type
*howto
;
163 struct reloc_std_external
*reloc
;
165 unsigned int r_length
;
169 PUT_WORD (abfd
, value
, reloc
->r_address
);
170 /* Size as a power of two. */
171 r_length
= howto
->size
;
173 /* Special case for branch relocations. */
174 if (howto
->type
== 3 || howto
->type
== 7)
177 r_pcrel
= howto
->type
& 4; /* PC Relative done? */
178 r_neg
= howto
->type
& 8; /* Negative relocation. */
180 if (bfd_header_big_endian (abfd
))
182 reloc
->r_index
[0] = r_index
>> 16;
183 reloc
->r_index
[1] = r_index
>> 8;
184 reloc
->r_index
[2] = r_index
;
186 ((r_extern
? RELOC_STD_BITS_EXTERN_BIG
: 0)
187 | (r_pcrel
? RELOC_STD_BITS_PCREL_BIG
: 0)
188 | (r_neg
? RELOC_ARM_BITS_NEG_BIG
: 0)
189 | (r_length
<< RELOC_STD_BITS_LENGTH_SH_BIG
));
193 reloc
->r_index
[2] = r_index
>> 16;
194 reloc
->r_index
[1] = r_index
>> 8;
195 reloc
->r_index
[0] = r_index
;
197 ((r_extern
? RELOC_STD_BITS_EXTERN_LITTLE
: 0)
198 | (r_pcrel
? RELOC_STD_BITS_PCREL_LITTLE
: 0)
199 | (r_neg
? RELOC_ARM_BITS_NEG_LITTLE
: 0)
200 | (r_length
<< RELOC_STD_BITS_LENGTH_SH_LITTLE
));
204 #define MY_put_reloc(BFD, EXT, IDX, VAL, HOWTO, RELOC) \
205 MY(put_reloc) (BFD, EXT, IDX, VAL, HOWTO, RELOC)
208 MY(relocatable_reloc
) (howto
, abfd
, reloc
, amount
, r_addr
)
209 reloc_howto_type
*howto
;
211 struct reloc_std_external
*reloc
;
215 if (howto
->type
== 3)
218 & (bfd_header_big_endian (abfd
)
219 ? RELOC_STD_BITS_EXTERN_BIG
: RELOC_STD_BITS_EXTERN_LITTLE
))
221 /* The reloc is still external, so don't modify anything. */
227 /* Change the r_pcrel value -- on the ARM, this bit is set once the
228 relocation is done. */
229 if (bfd_header_big_endian (abfd
))
230 reloc
->r_type
[0] |= RELOC_STD_BITS_PCREL_BIG
;
232 reloc
->r_type
[0] |= RELOC_STD_BITS_PCREL_LITTLE
;
235 else if (howto
->type
== 7)
239 #define MY_relocatable_reloc(HOW, BFD, REL, AMOUNT, ADDR) \
240 MY(relocatable_reloc) (HOW, BFD, REL, &(AMOUNT), ADDR)
242 static bfd_reloc_status_type
243 MY(fix_pcrel_26_done
) (abfd
, reloc_entry
, symbol
, data
, input_section
,
244 output_bfd
, error_message
)
245 bfd
*abfd ATTRIBUTE_UNUSED
;
246 arelent
*reloc_entry ATTRIBUTE_UNUSED
;
247 asymbol
*symbol ATTRIBUTE_UNUSED
;
248 PTR data ATTRIBUTE_UNUSED
;
249 asection
*input_section ATTRIBUTE_UNUSED
;
250 bfd
*output_bfd ATTRIBUTE_UNUSED
;
251 char **error_message ATTRIBUTE_UNUSED
;
253 /* This is dead simple at present. */
257 static bfd_reloc_status_type
258 MY(fix_pcrel_26
) (abfd
, reloc_entry
, symbol
, data
, input_section
,
259 output_bfd
, error_message
)
261 arelent
*reloc_entry
;
264 asection
*input_section
;
266 char **error_message ATTRIBUTE_UNUSED
;
269 bfd_size_type addr
= reloc_entry
->address
;
270 bfd_vma target
= bfd_get_32 (abfd
, (bfd_byte
*) data
+ addr
);
271 bfd_reloc_status_type flag
= bfd_reloc_ok
;
273 /* If this is an undefined symbol, return error. */
274 if (symbol
->section
== &bfd_und_section
275 && (symbol
->flags
& BSF_WEAK
) == 0)
276 return output_bfd
? bfd_reloc_ok
: bfd_reloc_undefined
;
278 /* If the sections are different, and we are doing a partial relocation,
279 just ignore it for now. */
280 if (symbol
->section
->name
!= input_section
->name
281 && output_bfd
!= (bfd
*)NULL
)
284 relocation
= (target
& 0x00ffffff) << 2;
285 relocation
= (relocation
^ 0x02000000) - 0x02000000; /* Sign extend. */
286 relocation
+= symbol
->value
;
287 relocation
+= symbol
->section
->output_section
->vma
;
288 relocation
+= symbol
->section
->output_offset
;
289 relocation
+= reloc_entry
->addend
;
290 relocation
-= input_section
->output_section
->vma
;
291 relocation
-= input_section
->output_offset
;
294 return bfd_reloc_overflow
;
296 /* Check for overflow. */
297 if (relocation
& 0x02000000)
299 if ((relocation
& ~ (bfd_vma
) 0x03ffffff) != ~ (bfd_vma
) 0x03ffffff)
300 flag
= bfd_reloc_overflow
;
302 else if (relocation
& ~ (bfd_vma
) 0x03ffffff)
303 flag
= bfd_reloc_overflow
;
305 target
&= ~ (bfd_vma
) 0x00ffffff;
306 target
|= (relocation
>> 2) & 0x00ffffff;
307 bfd_put_32 (abfd
, target
, (bfd_byte
*) data
+ addr
);
309 /* Now the ARM magic... Change the reloc type so that it is marked as done.
310 Strictly this is only necessary if we are doing a partial relocation. */
311 reloc_entry
->howto
= &MY(howto_table
)[7];
317 MY(bfd_reloc_type_lookup
) (abfd
,code
)
319 bfd_reloc_code_real_type code
;
321 #define ASTD(i,j) case i: return &MY(howto_table)[j]
322 if (code
== BFD_RELOC_CTOR
)
323 switch (bfd_get_arch_info (abfd
)->bits_per_address
)
329 return (const struct reloc_howto_struct
*) 0;
334 ASTD (BFD_RELOC_16
, 1);
335 ASTD (BFD_RELOC_32
, 2);
336 ASTD (BFD_RELOC_ARM_PCREL_BRANCH
, 3);
337 ASTD (BFD_RELOC_8_PCREL
, 4);
338 ASTD (BFD_RELOC_16_PCREL
, 5);
339 ASTD (BFD_RELOC_32_PCREL
, 6);
341 return (const struct reloc_howto_struct
*) 0;
345 #define MY_swap_std_reloc_in MY(swap_std_reloc_in)
346 #define MY_swap_std_reloc_out MY(swap_std_reloc_out)
347 #define MY_get_section_contents _bfd_generic_get_section_contents
348 /* #define MY_bfd_link_hash_table_create _bfd_generic_link_hash_table_create */
349 /* #define MY_bfd_link_add_symbols _bfd_generic_link_add_symbols */
350 /* #define MY_bfd_final_link _bfd_generic_final_link */
355 MY_swap_std_reloc_in (abfd
, bytes
, cache_ptr
, symbols
, symcount
)
357 struct reloc_std_external
*bytes
;
360 bfd_size_type symcount ATTRIBUTE_UNUSED
;
365 struct aoutdata
*su
= &(abfd
->tdata
.aout_data
->a
);
367 cache_ptr
->address
= H_GET_32 (abfd
, bytes
->r_address
);
369 cache_ptr
->howto
= MY_reloc_howto (abfd
, bytes
, r_index
, r_extern
, r_pcrel
);
375 MY_swap_std_reloc_out (abfd
, g
, natptr
)
378 struct reloc_std_external
*natptr
;
381 asymbol
*sym
= *(g
->sym_ptr_ptr
);
385 int r_neg
= 0; /* Negative relocs use the BASEREL bit. */
386 asection
*output_section
= sym
->section
->output_section
;
388 PUT_WORD(abfd
, g
->address
, natptr
->r_address
);
390 r_length
= g
->howto
->size
; /* Size as a power of two */
393 r_length
= -r_length
;
397 r_pcrel
= (int) g
->howto
->pc_relative
; /* Relative to PC? */
399 /* For RISC iX, in pc-relative relocs the r_pcrel bit means that the
400 relocation has been done already (Only for the 26-bit one I think)???!!!
403 if (g
->howto
->type
== 3)
408 else if (g
->howto
->type
== 7)
415 /* For a standard reloc, the addend is in the object file. */
416 r_addend
= g
->addend
+ (*(g
->sym_ptr_ptr
))->section
->output_section
->vma
;
419 /* name was clobbered by aout_write_syms to be symbol index */
421 /* If this relocation is relative to a symbol then set the
422 r_index to the symbols index, and the r_extern bit.
424 Absolute symbols can come in in two ways, either as an offset
425 from the abs section, or as a symbol which has an abs value.
429 if (bfd_is_com_section (output_section
)
430 || output_section
== &bfd_abs_section
431 || output_section
== &bfd_und_section
)
433 if (bfd_abs_section
.symbol
== sym
)
435 /* Whoops, looked like an abs symbol, but is really an offset
436 from the abs section. */
442 /* Fill in symbol. */
444 r_index
= (*(g
->sym_ptr_ptr
))->KEEPIT
;
449 /* Just an ordinary section. */
451 r_index
= output_section
->target_index
;
454 /* Now the fun stuff. */
455 if (bfd_header_big_endian (abfd
))
457 natptr
->r_index
[0] = r_index
>> 16;
458 natptr
->r_index
[1] = r_index
>> 8;
459 natptr
->r_index
[2] = r_index
;
461 ( (r_extern
? RELOC_STD_BITS_EXTERN_BIG
: 0)
462 | (r_pcrel
? RELOC_STD_BITS_PCREL_BIG
: 0)
463 | (r_neg
? RELOC_ARM_BITS_NEG_BIG
: 0)
464 | (r_length
<< RELOC_STD_BITS_LENGTH_SH_BIG
));
468 natptr
->r_index
[2] = r_index
>> 16;
469 natptr
->r_index
[1] = r_index
>> 8;
470 natptr
->r_index
[0] = r_index
;
472 ( (r_extern
? RELOC_STD_BITS_EXTERN_LITTLE
: 0)
473 | (r_pcrel
? RELOC_STD_BITS_PCREL_LITTLE
: 0)
474 | (r_neg
? RELOC_ARM_BITS_NEG_LITTLE
: 0)
475 | (r_length
<< RELOC_STD_BITS_LENGTH_SH_LITTLE
));
479 #define MY_BFD_TARGET
481 #include "aout-target.h"
483 extern const bfd_target aout_arm_big_vec
;
485 const bfd_target aout_arm_little_vec
=
487 "a.out-arm-little", /* name */
488 bfd_target_aout_flavour
,
489 BFD_ENDIAN_LITTLE
, /* target byte order (little) */
490 BFD_ENDIAN_LITTLE
, /* target headers byte order (little) */
491 (HAS_RELOC
| EXEC_P
| /* object flags */
492 HAS_LINENO
| HAS_DEBUG
|
493 HAS_SYMS
| HAS_LOCALS
| DYNAMIC
| WP_TEXT
| D_PAGED
),
494 (SEC_HAS_CONTENTS
| SEC_ALLOC
| SEC_LOAD
| SEC_RELOC
| SEC_CODE
| SEC_DATA
),
495 MY_symbol_leading_char
,
496 AR_PAD_CHAR
, /* ar_pad_char */
497 15, /* ar_max_namelen */
498 bfd_getl64
, bfd_getl_signed_64
, bfd_putl64
,
499 bfd_getl32
, bfd_getl_signed_32
, bfd_putl32
,
500 bfd_getl16
, bfd_getl_signed_16
, bfd_putl16
, /* data */
501 bfd_getl64
, bfd_getl_signed_64
, bfd_putl64
,
502 bfd_getl32
, bfd_getl_signed_32
, bfd_putl32
,
503 bfd_getl16
, bfd_getl_signed_16
, bfd_putl16
, /* hdrs */
504 {_bfd_dummy_target
, MY_object_p
, /* bfd_check_format */
505 bfd_generic_archive_p
, MY_core_file_p
},
506 {bfd_false
, MY_mkobject
, /* bfd_set_format */
507 _bfd_generic_mkarchive
, bfd_false
},
508 {bfd_false
, MY_write_object_contents
, /* bfd_write_contents */
509 _bfd_write_archive_contents
, bfd_false
},
511 BFD_JUMP_TABLE_GENERIC (MY
),
512 BFD_JUMP_TABLE_COPY (MY
),
513 BFD_JUMP_TABLE_CORE (MY
),
514 BFD_JUMP_TABLE_ARCHIVE (MY
),
515 BFD_JUMP_TABLE_SYMBOLS (MY
),
516 BFD_JUMP_TABLE_RELOCS (MY
),
517 BFD_JUMP_TABLE_WRITE (MY
),
518 BFD_JUMP_TABLE_LINK (MY
),
519 BFD_JUMP_TABLE_DYNAMIC (MY
),
523 (PTR
) MY_backend_data
,
526 const bfd_target aout_arm_big_vec
=
528 "a.out-arm-big", /* name */
529 bfd_target_aout_flavour
,
530 BFD_ENDIAN_BIG
, /* target byte order (big) */
531 BFD_ENDIAN_BIG
, /* target headers byte order (big) */
532 (HAS_RELOC
| EXEC_P
| /* object flags */
533 HAS_LINENO
| HAS_DEBUG
|
534 HAS_SYMS
| HAS_LOCALS
| DYNAMIC
| WP_TEXT
| D_PAGED
),
535 (SEC_HAS_CONTENTS
| SEC_ALLOC
| SEC_LOAD
| SEC_RELOC
| SEC_CODE
| SEC_DATA
),
536 MY_symbol_leading_char
,
537 AR_PAD_CHAR
, /* ar_pad_char */
538 15, /* ar_max_namelen */
539 bfd_getb64
, bfd_getb_signed_64
, bfd_putb64
,
540 bfd_getb32
, bfd_getb_signed_32
, bfd_putb32
,
541 bfd_getb16
, bfd_getb_signed_16
, bfd_putb16
, /* data */
542 bfd_getb64
, bfd_getb_signed_64
, bfd_putb64
,
543 bfd_getb32
, bfd_getb_signed_32
, bfd_putb32
,
544 bfd_getb16
, bfd_getb_signed_16
, bfd_putb16
, /* hdrs */
545 {_bfd_dummy_target
, MY_object_p
, /* bfd_check_format */
546 bfd_generic_archive_p
, MY_core_file_p
},
547 {bfd_false
, MY_mkobject
, /* bfd_set_format */
548 _bfd_generic_mkarchive
, bfd_false
},
549 {bfd_false
, MY_write_object_contents
, /* bfd_write_contents */
550 _bfd_write_archive_contents
, bfd_false
},
552 BFD_JUMP_TABLE_GENERIC (MY
),
553 BFD_JUMP_TABLE_COPY (MY
),
554 BFD_JUMP_TABLE_CORE (MY
),
555 BFD_JUMP_TABLE_ARCHIVE (MY
),
556 BFD_JUMP_TABLE_SYMBOLS (MY
),
557 BFD_JUMP_TABLE_RELOCS (MY
),
558 BFD_JUMP_TABLE_WRITE (MY
),
559 BFD_JUMP_TABLE_LINK (MY
),
560 BFD_JUMP_TABLE_DYNAMIC (MY
),
562 & aout_arm_little_vec
,
564 (PTR
) MY_backend_data
,