1 /* BFD back-end for Intel 960 b.out binaries.
2 Copyright 1990, 1991, 1992, 1993 Free Software Foundation, Inc.
3 Written by Cygnus Support.
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., 675 Mass Ave, Cambridge, MA 02139, USA. */
29 #include "aout/stab_gnu.h"
30 #include "libaout.h" /* BFD a.out internal data structures */
33 static int aligncode
PARAMS ((bfd
*abfd
, asection
*input_section
,
34 arelent
*r
, unsigned int shrink
));
35 static void perform_slip
PARAMS ((bfd
*abfd
, unsigned int slip
,
36 asection
*input_section
, bfd_vma value
));
37 static boolean b_out_squirt_out_relocs
PARAMS ((bfd
*abfd
, asection
*section
));
38 static bfd_target
*b_out_callback
PARAMS ((bfd
*));
39 static bfd_reloc_status_type calljx_callback
40 PARAMS ((bfd
*, struct bfd_link_info
*, arelent
*, PTR src
, PTR dst
,
42 static bfd_reloc_status_type callj_callback
43 PARAMS ((bfd
*, struct bfd_link_info
*, arelent
*, PTR data
,
44 unsigned int srcidx
, unsigned int dstidx
, asection
*));
45 static bfd_vma get_value
PARAMS ((arelent
*, struct bfd_link_info
*,
47 static int abs32code
PARAMS ((bfd
*, asection
*, arelent
*,
48 unsigned int, struct bfd_link_info
*));
49 static boolean b_out_relax_section
PARAMS ((bfd
*, asection
*,
50 struct bfd_link_info
*,
52 static bfd_byte
*b_out_get_relocated_section_contents
53 PARAMS ((bfd
*, struct bfd_link_info
*, struct bfd_link_order
*,
54 bfd_byte
*, boolean
, asymbol
**));
56 /* Swaps the information in an executable header taken from a raw byte
57 stream memory image, into the internal exec_header structure. */
60 bout_swap_exec_header_in (abfd
, raw_bytes
, execp
)
62 struct external_exec
*raw_bytes
;
63 struct internal_exec
*execp
;
65 struct external_exec
*bytes
= (struct external_exec
*)raw_bytes
;
67 /* Now fill in fields in the execp, from the bytes in the raw data. */
68 execp
->a_info
= bfd_h_get_32 (abfd
, bytes
->e_info
);
69 execp
->a_text
= GET_WORD (abfd
, bytes
->e_text
);
70 execp
->a_data
= GET_WORD (abfd
, bytes
->e_data
);
71 execp
->a_bss
= GET_WORD (abfd
, bytes
->e_bss
);
72 execp
->a_syms
= GET_WORD (abfd
, bytes
->e_syms
);
73 execp
->a_entry
= GET_WORD (abfd
, bytes
->e_entry
);
74 execp
->a_trsize
= GET_WORD (abfd
, bytes
->e_trsize
);
75 execp
->a_drsize
= GET_WORD (abfd
, bytes
->e_drsize
);
76 execp
->a_tload
= GET_WORD (abfd
, bytes
->e_tload
);
77 execp
->a_dload
= GET_WORD (abfd
, bytes
->e_dload
);
78 execp
->a_talign
= bytes
->e_talign
[0];
79 execp
->a_dalign
= bytes
->e_dalign
[0];
80 execp
->a_balign
= bytes
->e_balign
[0];
81 execp
->a_relaxable
= bytes
->e_relaxable
[0];
84 /* Swaps the information in an internal exec header structure into the
85 supplied buffer ready for writing to disk. */
87 PROTO(void, bout_swap_exec_header_out
,
89 struct internal_exec
*execp
,
90 struct external_exec
*raw_bytes
));
92 bout_swap_exec_header_out (abfd
, execp
, raw_bytes
)
94 struct internal_exec
*execp
;
95 struct external_exec
*raw_bytes
;
97 struct external_exec
*bytes
= (struct external_exec
*)raw_bytes
;
99 /* Now fill in fields in the raw data, from the fields in the exec struct. */
100 bfd_h_put_32 (abfd
, execp
->a_info
, bytes
->e_info
);
101 PUT_WORD (abfd
, execp
->a_text
, bytes
->e_text
);
102 PUT_WORD (abfd
, execp
->a_data
, bytes
->e_data
);
103 PUT_WORD (abfd
, execp
->a_bss
, bytes
->e_bss
);
104 PUT_WORD (abfd
, execp
->a_syms
, bytes
->e_syms
);
105 PUT_WORD (abfd
, execp
->a_entry
, bytes
->e_entry
);
106 PUT_WORD (abfd
, execp
->a_trsize
, bytes
->e_trsize
);
107 PUT_WORD (abfd
, execp
->a_drsize
, bytes
->e_drsize
);
108 PUT_WORD (abfd
, execp
->a_tload
, bytes
->e_tload
);
109 PUT_WORD (abfd
, execp
->a_dload
, bytes
->e_dload
);
110 bytes
->e_talign
[0] = execp
->a_talign
;
111 bytes
->e_dalign
[0] = execp
->a_dalign
;
112 bytes
->e_balign
[0] = execp
->a_balign
;
113 bytes
->e_relaxable
[0] = execp
->a_relaxable
;
118 b_out_object_p (abfd
)
121 struct internal_exec anexec
;
122 struct external_exec exec_bytes
;
124 if (bfd_read ((PTR
) &exec_bytes
, 1, EXEC_BYTES_SIZE
, abfd
)
125 != EXEC_BYTES_SIZE
) {
126 if (bfd_get_error () != bfd_error_system_call
)
127 bfd_set_error (bfd_error_wrong_format
);
131 anexec
.a_info
= bfd_h_get_32 (abfd
, exec_bytes
.e_info
);
133 if (N_BADMAG (anexec
)) {
134 bfd_set_error (bfd_error_wrong_format
);
138 bout_swap_exec_header_in (abfd
, &exec_bytes
, &anexec
);
139 return aout_32_some_aout_object_p (abfd
, &anexec
, b_out_callback
);
143 /* Finish up the opening of a b.out file for reading. Fill in all the
144 fields that are not handled by common code. */
147 b_out_callback (abfd
)
150 struct internal_exec
*execp
= exec_hdr (abfd
);
151 unsigned long bss_start
;
153 /* Architecture and machine type */
154 bfd_set_arch_mach(abfd
,
155 bfd_arch_i960
, /* B.out only used on i960 */
156 bfd_mach_i960_core
/* Default */
159 /* The positions of the string table and symbol table. */
160 obj_str_filepos (abfd
) = N_STROFF (*execp
);
161 obj_sym_filepos (abfd
) = N_SYMOFF (*execp
);
163 /* The alignments of the sections */
164 obj_textsec (abfd
)->alignment_power
= execp
->a_talign
;
165 obj_datasec (abfd
)->alignment_power
= execp
->a_dalign
;
166 obj_bsssec (abfd
)->alignment_power
= execp
->a_balign
;
168 /* The starting addresses of the sections. */
169 obj_textsec (abfd
)->vma
= execp
->a_tload
;
170 obj_datasec (abfd
)->vma
= execp
->a_dload
;
172 /* And reload the sizes, since the aout module zaps them */
173 obj_textsec (abfd
)->_raw_size
= execp
->a_text
;
175 bss_start
= execp
->a_dload
+ execp
->a_data
; /* BSS = end of data section */
176 obj_bsssec (abfd
)->vma
= align_power (bss_start
, execp
->a_balign
);
178 /* The file positions of the sections */
179 obj_textsec (abfd
)->filepos
= N_TXTOFF(*execp
);
180 obj_datasec (abfd
)->filepos
= N_DATOFF(*execp
);
182 /* The file positions of the relocation info */
183 obj_textsec (abfd
)->rel_filepos
= N_TROFF(*execp
);
184 obj_datasec (abfd
)->rel_filepos
= N_DROFF(*execp
);
186 adata(abfd
).page_size
= 1; /* Not applicable. */
187 adata(abfd
).segment_size
= 1; /* Not applicable. */
188 adata(abfd
).exec_bytes_size
= EXEC_BYTES_SIZE
;
190 if (execp
->a_relaxable
)
191 abfd
->flags
|= BFD_IS_RELAXABLE
;
195 struct bout_data_struct
{
197 struct internal_exec e
;
201 b_out_mkobject (abfd
)
204 struct bout_data_struct
*rawptr
;
206 rawptr
= (struct bout_data_struct
*) bfd_zalloc (abfd
, sizeof (struct bout_data_struct
));
207 if (rawptr
== NULL
) {
208 bfd_set_error (bfd_error_no_memory
);
212 abfd
->tdata
.bout_data
= rawptr
;
213 exec_hdr (abfd
) = &rawptr
->e
;
215 /* For simplicity's sake we just make all the sections right here. */
216 obj_textsec (abfd
) = (asection
*)NULL
;
217 obj_datasec (abfd
) = (asection
*)NULL
;
218 obj_bsssec (abfd
) = (asection
*)NULL
;
220 bfd_make_section (abfd
, ".text");
221 bfd_make_section (abfd
, ".data");
222 bfd_make_section (abfd
, ".bss");
228 b_out_write_object_contents (abfd
)
231 struct external_exec swapped_hdr
;
233 exec_hdr (abfd
)->a_info
= BMAGIC
;
235 exec_hdr (abfd
)->a_text
= obj_textsec (abfd
)->_raw_size
;
236 exec_hdr (abfd
)->a_data
= obj_datasec (abfd
)->_raw_size
;
237 exec_hdr (abfd
)->a_bss
= obj_bsssec (abfd
)->_raw_size
;
238 exec_hdr (abfd
)->a_syms
= bfd_get_symcount (abfd
) * sizeof (struct nlist
);
239 exec_hdr (abfd
)->a_entry
= bfd_get_start_address (abfd
);
240 exec_hdr (abfd
)->a_trsize
= ((obj_textsec (abfd
)->reloc_count
) *
241 sizeof (struct relocation_info
));
242 exec_hdr (abfd
)->a_drsize
= ((obj_datasec (abfd
)->reloc_count
) *
243 sizeof (struct relocation_info
));
245 exec_hdr (abfd
)->a_talign
= obj_textsec (abfd
)->alignment_power
;
246 exec_hdr (abfd
)->a_dalign
= obj_datasec (abfd
)->alignment_power
;
247 exec_hdr (abfd
)->a_balign
= obj_bsssec (abfd
)->alignment_power
;
249 exec_hdr (abfd
)->a_tload
= obj_textsec (abfd
)->vma
;
250 exec_hdr (abfd
)->a_dload
= obj_datasec (abfd
)->vma
;
252 bout_swap_exec_header_out (abfd
, exec_hdr (abfd
), &swapped_hdr
);
254 if (bfd_seek (abfd
, (file_ptr
) 0, SEEK_SET
) != 0
255 || (bfd_write ((PTR
) &swapped_hdr
, 1, EXEC_BYTES_SIZE
, abfd
)
259 /* Now write out reloc info, followed by syms and strings */
260 if (bfd_get_symcount (abfd
) != 0)
262 if (bfd_seek (abfd
, (file_ptr
)(N_SYMOFF(*exec_hdr(abfd
))), SEEK_SET
)
266 if (! aout_32_write_syms (abfd
))
269 if (bfd_seek (abfd
, (file_ptr
)(N_TROFF(*exec_hdr(abfd
))), SEEK_SET
) != 0)
272 if (!b_out_squirt_out_relocs (abfd
, obj_textsec (abfd
))) return false;
273 if (bfd_seek (abfd
, (file_ptr
)(N_DROFF(*exec_hdr(abfd
))), SEEK_SET
)
277 if (!b_out_squirt_out_relocs (abfd
, obj_datasec (abfd
))) return false;
282 /** Some reloc hackery */
284 #define CALLS 0x66003800 /* Template for 'calls' instruction */
285 #define BAL 0x0b000000 /* Template for 'bal' instruction */
286 #define BALX 0x85000000 /* Template for 'balx' instruction */
287 #define BAL_MASK 0x00ffffff
288 #define CALL 0x09000000
289 #define PCREL13_MASK 0x1fff
292 #define output_addr(sec) ((sec)->output_offset+(sec)->output_section->vma)
294 /* Magic to turn callx into calljx */
295 static bfd_reloc_status_type
296 calljx_callback (abfd
, link_info
, reloc_entry
, src
, dst
, input_section
)
298 struct bfd_link_info
*link_info
;
299 arelent
*reloc_entry
;
302 asection
*input_section
;
304 int word
= bfd_get_32 (abfd
, src
);
305 asymbol
*symbol_in
= *(reloc_entry
->sym_ptr_ptr
);
306 aout_symbol_type
*symbol
= aout_symbol (symbol_in
);
309 value
= get_value (reloc_entry
, link_info
, input_section
);
311 if (IS_CALLNAME (symbol
->other
))
313 aout_symbol_type
*balsym
= symbol
+1;
314 int inst
= bfd_get_32 (abfd
, (bfd_byte
*) src
-4);
315 /* The next symbol should be an N_BALNAME */
316 BFD_ASSERT (IS_BALNAME (balsym
->other
));
319 bfd_put_32 (abfd
, inst
, (bfd_byte
*) dst
-4);
321 value
= (symbol
->symbol
.value
322 + output_addr (symbol
->symbol
.section
));
325 word
+= value
+ reloc_entry
->addend
;
327 bfd_put_32(abfd
, word
, dst
);
332 /* Magic to turn call into callj */
333 static bfd_reloc_status_type
334 callj_callback (abfd
, link_info
, reloc_entry
, data
, srcidx
, dstidx
,
337 struct bfd_link_info
*link_info
;
338 arelent
*reloc_entry
;
342 asection
*input_section
;
344 int word
= bfd_get_32 (abfd
, (bfd_byte
*) data
+ srcidx
);
345 asymbol
*symbol_in
= *(reloc_entry
->sym_ptr_ptr
);
346 aout_symbol_type
*symbol
= aout_symbol (symbol_in
);
349 value
= get_value (reloc_entry
, link_info
, input_section
);
351 if (IS_OTHER(symbol
->other
))
353 /* Call to a system procedure - replace code with system
355 word
= CALLS
| (symbol
->other
- 1);
357 else if (IS_CALLNAME(symbol
->other
))
359 aout_symbol_type
*balsym
= symbol
+1;
361 /* The next symbol should be an N_BALNAME. */
362 BFD_ASSERT(IS_BALNAME(balsym
->other
));
364 /* We are calling a leaf, so replace the call instruction with a
367 + output_addr (balsym
->symbol
.section
)
368 + balsym
->symbol
.value
+ reloc_entry
->addend
370 - output_addr (input_section
))
375 word
= CALL
| (((word
& BAL_MASK
)
377 + reloc_entry
->addend
379 - output_addr (input_section
))
382 bfd_put_32(abfd
, word
, (bfd_byte
*) data
+ dstidx
);
386 /* type rshift size bitsize pcrel bitpos absolute overflow check*/
389 #define ABS32CODE_SHRUNK 1
394 #define ABS32_MAYBE_RELAXABLE 1
395 #define ABS32_WAS_RELAXABLE 2
399 static reloc_howto_type howto_reloc_callj
=
400 HOWTO(CALLJ
, 0, 2, 24, true, 0, complain_overflow_signed
, 0,"callj", true, 0x00ffffff, 0x00ffffff,false);
401 static reloc_howto_type howto_reloc_abs32
=
402 HOWTO(ABS32
, 0, 2, 32, false, 0, complain_overflow_bitfield
,0,"abs32", true, 0xffffffff,0xffffffff,false);
403 static reloc_howto_type howto_reloc_pcrel24
=
404 HOWTO(PCREL24
, 0, 2, 24, true, 0, complain_overflow_signed
,0,"pcrel24", true, 0x00ffffff,0x00ffffff,false);
406 static reloc_howto_type howto_reloc_pcrel13
=
407 HOWTO(PCREL13
, 0, 2, 13, true, 0, complain_overflow_signed
,0,"pcrel13", true, 0x00001fff,0x00001fff,false);
410 static reloc_howto_type howto_reloc_abs32codeshrunk
=
411 HOWTO(ABS32CODE_SHRUNK
, 0, 2, 24, true, 0, complain_overflow_signed
, 0,"callx->callj", true, 0x00ffffff, 0x00ffffff,false);
413 static reloc_howto_type howto_reloc_abs32code
=
414 HOWTO(ABS32CODE
, 0, 2, 32, false, 0, complain_overflow_bitfield
,0,"callx", true, 0xffffffff,0xffffffff,false);
416 static reloc_howto_type howto_align_table
[] = {
417 HOWTO (ALIGNER
, 0, 0x1, 0, false, 0, complain_overflow_dont
, 0, "align16", false, 0, 0, false),
418 HOWTO (ALIGNER
, 0, 0x3, 0, false, 0, complain_overflow_dont
, 0, "align32", false, 0, 0, false),
419 HOWTO (ALIGNER
, 0, 0x7, 0, false, 0, complain_overflow_dont
, 0, "align64", false, 0, 0, false),
420 HOWTO (ALIGNER
, 0, 0xf, 0, false, 0, complain_overflow_dont
, 0, "align128", false, 0, 0, false),
423 static reloc_howto_type howto_done_align_table
[] = {
424 HOWTO (ALIGNDONE
, 0x1, 0x1, 0, false, 0, complain_overflow_dont
, 0, "donealign16", false, 0, 0, false),
425 HOWTO (ALIGNDONE
, 0x3, 0x3, 0, false, 0, complain_overflow_dont
, 0, "donealign32", false, 0, 0, false),
426 HOWTO (ALIGNDONE
, 0x7, 0x7, 0, false, 0, complain_overflow_dont
, 0, "donealign64", false, 0, 0, false),
427 HOWTO (ALIGNDONE
, 0xf, 0xf, 0, false, 0, complain_overflow_dont
, 0, "donealign128", false, 0, 0, false),
430 static const reloc_howto_type
*
431 b_out_reloc_type_lookup (abfd
, code
)
433 bfd_reloc_code_real_type code
;
439 case BFD_RELOC_I960_CALLJ
:
440 return &howto_reloc_callj
;
442 return &howto_reloc_abs32
;
443 case BFD_RELOC_24_PCREL
:
444 return &howto_reloc_pcrel24
;
448 /* Allocate enough room for all the reloc entries, plus pointers to them all */
451 b_out_slurp_reloc_table (abfd
, asect
, symbols
)
456 register struct relocation_info
*rptr
;
457 unsigned int counter
;
459 int extern_mask
, pcrel_mask
, callj_mask
, length_shift
;
462 bfd_vma prev_addr
= 0;
465 struct relocation_info
*relocs
;
466 arelent
*reloc_cache
;
468 if (asect
->relocation
)
470 if (!aout_32_slurp_symbol_table (abfd
))
473 if (asect
== obj_datasec (abfd
)) {
474 reloc_size
= exec_hdr(abfd
)->a_drsize
;
478 if (asect
== obj_textsec (abfd
)) {
479 reloc_size
= exec_hdr(abfd
)->a_trsize
;
483 bfd_set_error (bfd_error_invalid_operation
);
487 if (bfd_seek (abfd
, (file_ptr
)(asect
->rel_filepos
), SEEK_SET
) != 0)
489 count
= reloc_size
/ sizeof (struct relocation_info
);
491 relocs
= (struct relocation_info
*) malloc (reloc_size
);
492 if (!relocs
&& reloc_size
!= 0) {
493 bfd_set_error (bfd_error_no_memory
);
496 reloc_cache
= (arelent
*) malloc ((count
+1) * sizeof (arelent
));
498 free ((char*)relocs
);
499 bfd_set_error (bfd_error_no_memory
);
503 if (bfd_read ((PTR
) relocs
, 1, reloc_size
, abfd
) != reloc_size
) {
511 if (abfd
->xvec
->header_byteorder_big_p
) {
512 /* big-endian bit field allocation order */
520 /* little-endian bit field allocation order */
529 for (rptr
= relocs
, cache_ptr
= reloc_cache
, counter
= 0;
531 counter
++, rptr
++, cache_ptr
++)
533 unsigned char *raw
= (unsigned char *)rptr
;
535 cache_ptr
->address
= bfd_h_get_32 (abfd
, raw
+ 0);
536 cache_ptr
->howto
= 0;
537 if (abfd
->xvec
->header_byteorder_big_p
)
539 symnum
= (raw
[4] << 16) | (raw
[5] << 8) | raw
[6];
543 symnum
= (raw
[6] << 16) | (raw
[5] << 8) | raw
[4];
546 if (raw
[7] & extern_mask
)
548 /* if this is set then the r_index is a index into the symbol table;
549 * if the bit is not set then r_index contains a section map.
550 * we either fill in the sym entry with a pointer to the symbol,
551 * or point to the correct section
553 cache_ptr
->sym_ptr_ptr
= symbols
+ symnum
;
554 cache_ptr
->addend
= 0;
557 /* in a.out symbols are relative to the beginning of the
558 * file rather than sections ?
559 * (look in translate_from_native_sym_flags)
560 * the reloc entry addend has added to it the offset into the
561 * file of the data, so subtract the base to make the reloc
562 * section relative */
565 /* sign-extend symnum from 24 bits to whatever host uses */
570 cache_ptr
->sym_ptr_ptr
= (asymbol
**)NULL
;
575 cache_ptr
->sym_ptr_ptr
= obj_textsec(abfd
)->symbol_ptr_ptr
;
576 cache_ptr
->addend
= - obj_textsec(abfd
)->vma
;
580 cache_ptr
->sym_ptr_ptr
= obj_datasec(abfd
)->symbol_ptr_ptr
;
581 cache_ptr
->addend
= - obj_datasec(abfd
)->vma
;
585 cache_ptr
->sym_ptr_ptr
= obj_bsssec(abfd
)->symbol_ptr_ptr
;
586 cache_ptr
->addend
= - obj_bsssec(abfd
)->vma
;
590 cache_ptr
->sym_ptr_ptr
= obj_bsssec(abfd
)->symbol_ptr_ptr
;
591 cache_ptr
->addend
= 0;
593 case -2: /* .align */
594 if (raw
[7] & pcrel_mask
)
596 cache_ptr
->howto
= &howto_align_table
[(raw
[7] >> length_shift
) & 3];
597 cache_ptr
->sym_ptr_ptr
= &bfd_abs_symbol
;
604 cache_ptr
->addend
= 0;
613 /* the i960 only has a few relocation types:
614 abs 32-bit and pcrel 24bit. except for callj's! */
615 if (cache_ptr
->howto
!= 0)
617 else if (raw
[7] & callj_mask
)
619 cache_ptr
->howto
= &howto_reloc_callj
;
621 else if ( raw
[7] & pcrel_mask
)
623 if (raw
[7] & size_mask
)
624 cache_ptr
->howto
= &howto_reloc_pcrel13
;
626 cache_ptr
->howto
= &howto_reloc_pcrel24
;
630 if (raw
[7] & incode_mask
)
632 cache_ptr
->howto
= &howto_reloc_abs32code
;
636 cache_ptr
->howto
= &howto_reloc_abs32
;
639 if (cache_ptr
->address
< prev_addr
)
641 /* Ouch! this reloc is out of order, insert into the right place
644 arelent
*cursor
= cache_ptr
-1;
645 bfd_vma stop
= cache_ptr
->address
;
647 while (cursor
->address
> stop
&& cursor
>= reloc_cache
)
649 cursor
[1] = cursor
[0];
656 prev_addr
= cache_ptr
->address
;
662 asect
->relocation
= reloc_cache
;
663 asect
->reloc_count
= count
;
671 b_out_squirt_out_relocs (abfd
, section
)
680 unsigned int count
= section
->reloc_count
;
681 struct relocation_info
*native
, *natptr
;
682 size_t natsize
= count
* sizeof (struct relocation_info
);
683 int extern_mask
, pcrel_mask
, len_2
, callj_mask
;
684 if (count
== 0) return true;
685 generic
= section
->orelocation
;
686 native
= ((struct relocation_info
*) malloc (natsize
));
687 if (!native
&& natsize
!= 0) {
688 bfd_set_error (bfd_error_no_memory
);
692 if (abfd
->xvec
->header_byteorder_big_p
)
694 /* Big-endian bit field allocation order */
704 /* Little-endian bit field allocation order */
713 for (natptr
= native
; count
> 0; --count
, ++natptr
, ++generic
)
715 arelent
*g
= *generic
;
716 unsigned char *raw
= (unsigned char *)natptr
;
717 asymbol
*sym
= *(g
->sym_ptr_ptr
);
719 asection
*output_section
= sym
->section
->output_section
;
721 bfd_h_put_32(abfd
, g
->address
, raw
);
722 /* Find a type in the output format which matches the input howto -
723 * at the moment we assume input format == output format FIXME!!
726 /* FIXME: Need callj stuff here, and to check the howto entries to
727 be sure they are real for this architecture. */
728 if (g
->howto
== &howto_reloc_callj
)
730 raw
[7] = callj_mask
+ pcrel_mask
+ len_2
;
732 else if (g
->howto
== &howto_reloc_pcrel24
)
734 raw
[7] = pcrel_mask
+ len_2
;
736 else if (g
->howto
== &howto_reloc_pcrel13
)
738 raw
[7] = pcrel_mask
+ len_1
;
740 else if (g
->howto
== &howto_reloc_abs32code
)
742 raw
[7] = len_2
+ incode_mask
;
744 else if (g
->howto
>= howto_align_table
745 && g
->howto
<= (howto_align_table
746 + sizeof (howto_align_table
) / sizeof (howto_align_table
[0])
749 /* symnum == -2; extern_mask not set, pcrel_mask set */
753 | ((g
->howto
- howto_align_table
) << 1));
760 /* already mucked with r_extern, r_idx */;
761 else if (bfd_is_com_section (output_section
)
762 || output_section
== &bfd_abs_section
763 || output_section
== &bfd_und_section
)
766 if (bfd_abs_section
.symbol
== sym
)
768 /* Whoops, looked like an abs symbol, but is really an offset
769 from the abs section */
778 r_idx
= stoi((*(g
->sym_ptr_ptr
))->flags
);
783 /* Just an ordinary section */
785 r_idx
= output_section
->target_index
;
788 if (abfd
->xvec
->header_byteorder_big_p
) {
789 raw
[4] = (unsigned char) (r_idx
>> 16);
790 raw
[5] = (unsigned char) (r_idx
>> 8);
791 raw
[6] = (unsigned char) (r_idx
);
793 raw
[6] = (unsigned char) (r_idx
>> 16);
794 raw
[5] = (unsigned char) (r_idx
>> 8);
795 raw
[4] = (unsigned char) (r_idx
);
798 raw
[7] |= extern_mask
;
801 if (bfd_write ((PTR
) native
, 1, natsize
, abfd
) != natsize
) {
810 /* This is stupid. This function should be a boolean predicate */
812 b_out_canonicalize_reloc (abfd
, section
, relptr
, symbols
)
818 arelent
*tblptr
= section
->relocation
;
819 unsigned int count
= 0;
821 if (!(tblptr
|| b_out_slurp_reloc_table (abfd
, section
, symbols
)))
823 tblptr
= section
->relocation
;
825 for (; count
++ < section
->reloc_count
;)
826 *relptr
++ = tblptr
++;
830 return section
->reloc_count
;
834 b_out_get_reloc_upper_bound (abfd
, asect
)
838 if (bfd_get_format (abfd
) != bfd_object
) {
839 bfd_set_error (bfd_error_invalid_operation
);
843 if (asect
== obj_datasec (abfd
))
844 return (sizeof (arelent
*) *
845 ((exec_hdr(abfd
)->a_drsize
/ sizeof (struct relocation_info
))
848 if (asect
== obj_textsec (abfd
))
849 return (sizeof (arelent
*) *
850 ((exec_hdr(abfd
)->a_trsize
/ sizeof (struct relocation_info
))
853 if (asect
== obj_bsssec (abfd
))
856 bfd_set_error (bfd_error_invalid_operation
);
861 b_out_set_section_contents (abfd
, section
, location
, offset
, count
)
864 unsigned char *location
;
869 if (abfd
->output_has_begun
== false) { /* set by bfd.c handler */
870 if ((obj_textsec (abfd
) == NULL
) || (obj_datasec (abfd
) == NULL
) /*||
871 (obj_textsec (abfd)->_cooked_size == 0) || (obj_datasec (abfd)->_cooked_size == 0)*/) {
872 bfd_set_error (bfd_error_invalid_operation
);
876 obj_textsec (abfd
)->filepos
= sizeof(struct internal_exec
);
877 obj_datasec(abfd
)->filepos
= obj_textsec(abfd
)->filepos
878 + obj_textsec (abfd
)->_raw_size
;
881 /* regardless, once we know what we're doing, we might as well get going */
882 if (bfd_seek (abfd
, section
->filepos
+ offset
, SEEK_SET
) != 0)
886 return (bfd_write ((PTR
)location
, 1, count
, abfd
) == count
) ?true:false;
892 b_out_set_arch_mach (abfd
, arch
, machine
)
894 enum bfd_architecture arch
;
895 unsigned long machine
;
897 bfd_default_set_arch_mach(abfd
, arch
, machine
);
899 if (arch
== bfd_arch_unknown
) /* Unknown machine arch is OK */
901 if (arch
== bfd_arch_i960
) /* i960 default is OK */
903 case bfd_mach_i960_core
:
904 case bfd_mach_i960_kb_sb
:
905 case bfd_mach_i960_mc
:
906 case bfd_mach_i960_xa
:
907 case bfd_mach_i960_ca
:
908 case bfd_mach_i960_ka_sa
:
919 b_out_sizeof_headers (ignore_abfd
, ignore
)
923 return sizeof(struct internal_exec
);
928 /************************************************************************/
930 get_value (reloc
, link_info
, input_section
)
932 struct bfd_link_info
*link_info
;
933 asection
*input_section
;
936 asymbol
*symbol
= *(reloc
->sym_ptr_ptr
);
938 /* A symbol holds a pointer to a section, and an offset from the
939 base of the section. To relocate, we find where the section will
940 live in the output and add that in */
942 if (symbol
->section
== &bfd_und_section
)
944 struct bfd_link_hash_entry
*h
;
946 /* The symbol is undefined in this BFD. Look it up in the
947 global linker hash table. FIXME: This should be changed when
948 we convert b.out to use a specific final_link function and
949 change the interface to bfd_relax_section to not require the
951 h
= bfd_link_hash_lookup (link_info
->hash
, bfd_asymbol_name (symbol
),
953 if (h
!= (struct bfd_link_hash_entry
*) NULL
954 && h
->type
== bfd_link_hash_defined
)
955 value
= h
->u
.def
.value
+ output_addr (h
->u
.def
.section
);
956 else if (h
!= (struct bfd_link_hash_entry
*) NULL
957 && h
->type
== bfd_link_hash_common
)
961 if (! ((*link_info
->callbacks
->undefined_symbol
)
962 (link_info
, bfd_asymbol_name (symbol
),
963 input_section
->owner
, input_section
, reloc
->address
)))
970 value
= symbol
->value
+ output_addr (symbol
->section
);
973 /* Add the value contained in the relocation */
974 value
+= reloc
->addend
;
980 perform_slip (abfd
, slip
, input_section
, value
)
983 asection
*input_section
;
988 s
= _bfd_generic_link_get_symbols (abfd
);
989 BFD_ASSERT (s
!= (asymbol
**) NULL
);
991 /* Find all symbols past this point, and make them know
996 if (p
->section
== input_section
)
998 /* This was pointing into this section, so mangle it */
999 if (p
->value
> value
)
1002 if (p
->udata
!= NULL
)
1004 struct generic_link_hash_entry
*h
;
1006 h
= (struct generic_link_hash_entry
*) p
->udata
;
1007 BFD_ASSERT (h
->root
.type
== bfd_link_hash_defined
);
1008 h
->root
.u
.def
.value
-= slip
;
1009 BFD_ASSERT (h
->root
.u
.def
.value
== p
->value
);
1018 /* This routine works out if the thing we want to get to can be
1019 reached with a 24bit offset instead of a 32 bit one.
1020 If it can, then it changes the amode */
1023 abs32code (abfd
, input_section
, r
, shrink
, link_info
)
1025 asection
*input_section
;
1027 unsigned int shrink
;
1028 struct bfd_link_info
*link_info
;
1030 bfd_vma value
= get_value (r
, link_info
, input_section
);
1031 bfd_vma dot
= output_addr (input_section
) + r
->address
;
1034 /* See if the address we're looking at within 2^23 bytes of where
1035 we are, if so then we can use a small branch rather than the
1036 jump we were going to */
1038 gap
= value
- (dot
- shrink
);
1041 if (-1<<23 < (long)gap
&& (long)gap
< 1<<23 )
1043 /* Change the reloc type from 32bitcode possible 24, to 24bit
1046 r
->howto
= &howto_reloc_abs32codeshrunk
;
1047 /* The place to relc moves back by four bytes */
1050 /* This will be four bytes smaller in the long run */
1052 perform_slip (abfd
, 4, input_section
, r
->address
-shrink
+ 4);
1058 aligncode (abfd
, input_section
, r
, shrink
)
1060 asection
*input_section
;
1062 unsigned int shrink
;
1064 bfd_vma dot
= output_addr (input_section
) + r
->address
;
1069 int size
= r
->howto
->size
;
1071 /* Reduce the size of the alignment so that it's still aligned but
1072 smaller - the current size is already the same size as or bigger
1073 than the alignment required. */
1075 /* calculate the first byte following the padding before we optimize */
1076 old_end
= ((dot
+ size
) & ~size
) + size
+1;
1077 /* work out where the new end will be - remember that we're smaller
1078 than we used to be */
1079 new_end
= ((dot
- shrink
+ size
) & ~size
);
1081 /* This is the new end */
1082 gap
= old_end
- ((dot
+ size
) & ~size
);
1084 shrink_delta
= (old_end
- new_end
) - shrink
;
1088 /* Change the reloc so that it knows how far to align to */
1089 r
->howto
= howto_done_align_table
+ (r
->howto
- howto_align_table
);
1091 /* Encode the stuff into the addend - for future use we need to
1092 know how big the reloc used to be */
1093 r
->addend
= old_end
- dot
+ r
->address
;
1095 /* This will be N bytes smaller in the long run, adjust all the symbols */
1096 perform_slip (abfd
, shrink_delta
, input_section
, r
->address
- shrink
);
1097 shrink
+= shrink_delta
;
1103 b_out_relax_section (abfd
, i
, link_info
, again
)
1106 struct bfd_link_info
*link_info
;
1109 /* Get enough memory to hold the stuff */
1110 bfd
*input_bfd
= i
->owner
;
1111 asection
*input_section
= i
;
1113 arelent
**reloc_vector
= NULL
;
1114 long reloc_size
= bfd_get_reloc_upper_bound(input_bfd
,
1120 /* We only run this relaxation once. It might work to run it
1121 multiple times, but it hasn't been tested. */
1128 reloc_vector
= (arelent
**) malloc (reloc_size
);
1129 if (reloc_vector
== NULL
&& reloc_size
!= 0)
1131 bfd_set_error (bfd_error_no_memory
);
1135 /* Get the relocs and think about them */
1137 bfd_canonicalize_reloc (input_bfd
, input_section
, reloc_vector
,
1138 _bfd_generic_link_get_symbols (input_bfd
));
1139 if (reloc_count
< 0)
1141 if (reloc_count
> 0)
1144 for (parent
= reloc_vector
; *parent
; parent
++)
1146 arelent
*r
= *parent
;
1147 switch (r
->howto
->type
)
1150 /* An alignment reloc */
1151 shrink
= aligncode (abfd
, input_section
, r
, shrink
);
1154 /* A 32bit reloc in an addressing mode */
1155 shrink
= abs32code (input_bfd
, input_section
, r
, shrink
,
1158 case ABS32CODE_SHRUNK
:
1165 input_section
->_cooked_size
= input_section
->_raw_size
- shrink
;
1167 if (reloc_vector
!= NULL
)
1168 free (reloc_vector
);
1171 if (reloc_vector
!= NULL
)
1172 free (reloc_vector
);
1177 b_out_get_relocated_section_contents (in_abfd
, link_info
, link_order
, data
,
1178 relocateable
, symbols
)
1180 struct bfd_link_info
*link_info
;
1181 struct bfd_link_order
*link_order
;
1183 boolean relocateable
;
1186 /* Get enough memory to hold the stuff */
1187 bfd
*input_bfd
= link_order
->u
.indirect
.section
->owner
;
1188 asection
*input_section
= link_order
->u
.indirect
.section
;
1189 long reloc_size
= bfd_get_reloc_upper_bound(input_bfd
,
1191 arelent
**reloc_vector
= NULL
;
1197 /* If producing relocateable output, don't bother to relax. */
1199 return bfd_generic_get_relocated_section_contents (in_abfd
, link_info
,
1204 reloc_vector
= (arelent
**) malloc (reloc_size
);
1205 if (reloc_vector
== NULL
&& reloc_size
!= 0)
1207 bfd_set_error (bfd_error_no_memory
);
1211 input_section
->reloc_done
= 1;
1213 /* read in the section */
1214 BFD_ASSERT (true == bfd_get_section_contents(input_bfd
,
1218 input_section
->_raw_size
));
1220 reloc_count
= bfd_canonicalize_reloc (input_bfd
,
1224 if (reloc_count
< 0)
1226 if (reloc_count
> 0)
1228 arelent
**parent
= reloc_vector
;
1231 unsigned int dst_address
= 0;
1232 unsigned int src_address
= 0;
1236 /* Find how long a run we can do */
1237 while (dst_address
< link_order
->size
)
1242 /* Note that the relaxing didn't tie up the addresses in the
1243 relocation, so we use the original address to work out the
1244 run of non-relocated data */
1245 BFD_ASSERT (reloc
->address
>= src_address
);
1246 run
= reloc
->address
- src_address
;
1251 run
= link_order
->size
- dst_address
;
1253 /* Copy the bytes */
1254 for (idx
= 0; idx
< run
; idx
++)
1256 data
[dst_address
++] = data
[src_address
++];
1259 /* Now do the relocation */
1263 switch (reloc
->howto
->type
)
1266 calljx_callback (in_abfd
, link_info
, reloc
,
1267 src_address
+ data
, dst_address
+ data
,
1274 (bfd_get_32 (in_abfd
, data
+src_address
)
1275 + get_value (reloc
, link_info
, input_section
)),
1281 callj_callback (in_abfd
, link_info
, reloc
, data
, src_address
,
1282 dst_address
, input_section
);
1287 BFD_ASSERT (reloc
->addend
>= src_address
);
1288 BFD_ASSERT (reloc
->addend
<= input_section
->_raw_size
);
1289 src_address
= reloc
->addend
;
1290 dst_address
= ((dst_address
+ reloc
->howto
->size
)
1291 & ~reloc
->howto
->size
);
1293 case ABS32CODE_SHRUNK
:
1294 /* This used to be a callx, but we've found out that a
1295 callj will reach, so do the right thing. */
1296 callj_callback (in_abfd
, link_info
, reloc
, data
,
1297 src_address
+ 4, dst_address
, input_section
);
1303 long int word
= bfd_get_32(in_abfd
, data
+src_address
);
1306 value
= get_value (reloc
, link_info
, input_section
);
1307 word
= ((word
& ~BAL_MASK
)
1308 | (((word
& BAL_MASK
)
1310 - output_addr (input_section
)
1314 bfd_put_32(in_abfd
,word
, data
+dst_address
);
1323 long int word
= bfd_get_32(in_abfd
, data
+src_address
);
1326 value
= get_value (reloc
, link_info
, input_section
);
1327 word
= ((word
& ~PCREL13_MASK
)
1328 | (((word
& PCREL13_MASK
)
1331 - output_addr (input_section
))
1334 bfd_put_32(in_abfd
,word
, data
+dst_address
);
1347 if (reloc_vector
!= NULL
)
1348 free (reloc_vector
);
1351 if (reloc_vector
!= NULL
)
1352 free (reloc_vector
);
1355 /***********************************************************************/
1357 /* Build the transfer vectors for Big and Little-Endian B.OUT files. */
1359 /* We don't have core files. */
1360 #define aout_32_core_file_failing_command _bfd_dummy_core_file_failing_command
1361 #define aout_32_core_file_failing_signal _bfd_dummy_core_file_failing_signal
1362 #define aout_32_core_file_matches_executable_p \
1363 _bfd_dummy_core_file_matches_executable_p
1365 /* We use BSD-Unix generic archive files. */
1366 #define aout_32_openr_next_archived_file bfd_generic_openr_next_archived_file
1367 #define aout_32_generic_stat_arch_elt bfd_generic_stat_arch_elt
1368 #define aout_32_slurp_armap bfd_slurp_bsd_armap
1369 #define aout_32_slurp_extended_name_table _bfd_slurp_extended_name_table
1370 #define aout_32_write_armap bsd_write_armap
1371 #define aout_32_truncate_arname bfd_bsd_truncate_arname
1373 /* We override these routines from the usual a.out file routines. */
1374 #define aout_32_canonicalize_reloc b_out_canonicalize_reloc
1375 #define aout_32_get_reloc_upper_bound b_out_get_reloc_upper_bound
1376 #define aout_32_set_section_contents b_out_set_section_contents
1377 #define aout_32_set_arch_mach b_out_set_arch_mach
1378 #define aout_32_sizeof_headers b_out_sizeof_headers
1380 #define aout_32_bfd_debug_info_start bfd_void
1381 #define aout_32_bfd_debug_info_end bfd_void
1382 #define aout_32_bfd_debug_info_accumulate (PROTO(void,(*),(bfd*, struct sec *))) bfd_void
1384 #define aout_32_bfd_get_relocated_section_contents b_out_get_relocated_section_contents
1385 #define aout_32_bfd_relax_section b_out_relax_section
1386 #define aout_32_bfd_reloc_type_lookup b_out_reloc_type_lookup
1387 #define aout_32_bfd_make_debug_symbol \
1388 ((asymbol *(*) PARAMS ((bfd *, void *, unsigned long))) bfd_nullvoidptr)
1389 #define aout_32_bfd_link_hash_table_create _bfd_generic_link_hash_table_create
1390 #define aout_32_bfd_link_add_symbols _bfd_generic_link_add_symbols
1391 #define aout_32_bfd_final_link _bfd_generic_final_link
1392 #define aout_32_close_and_cleanup aout_32_bfd_free_cached_info
1394 bfd_target b_out_vec_big_host
=
1396 "b.out.big", /* name */
1397 bfd_target_aout_flavour
,
1398 false, /* data byte order is little */
1399 true, /* hdr byte order is big */
1400 (HAS_RELOC
| EXEC_P
| /* object flags */
1401 HAS_LINENO
| HAS_DEBUG
|
1402 HAS_SYMS
| HAS_LOCALS
| WP_TEXT
| BFD_IS_RELAXABLE
),
1403 (SEC_HAS_CONTENTS
| SEC_ALLOC
| SEC_LOAD
| SEC_RELOC
), /* section flags */
1404 '_', /* symbol leading char */
1405 ' ', /* ar_pad_char */
1406 16, /* ar_max_namelen */
1407 2, /* minumum alignment power */
1409 bfd_getl64
, bfd_getl_signed_64
, bfd_putl64
,
1410 bfd_getl32
, bfd_getl_signed_32
, bfd_putl32
,
1411 bfd_getl16
, bfd_getl_signed_16
, bfd_putl16
, /* data */
1412 bfd_getb64
, bfd_getb_signed_64
, bfd_putb64
,
1413 bfd_getb32
, bfd_getb_signed_32
, bfd_putb32
,
1414 bfd_getb16
, bfd_getb_signed_16
, bfd_putb16
, /* hdrs */
1415 {_bfd_dummy_target
, b_out_object_p
, /* bfd_check_format */
1416 bfd_generic_archive_p
, _bfd_dummy_target
},
1417 {bfd_false
, b_out_mkobject
, /* bfd_set_format */
1418 _bfd_generic_mkarchive
, bfd_false
},
1419 {bfd_false
, b_out_write_object_contents
, /* bfd_write_contents */
1420 _bfd_write_archive_contents
, bfd_false
},
1422 JUMP_TABLE(aout_32
),
1427 bfd_target b_out_vec_little_host
=
1429 "b.out.little", /* name */
1430 bfd_target_aout_flavour
,
1431 false, /* data byte order is little */
1432 false, /* header byte order is little */
1433 (HAS_RELOC
| EXEC_P
| /* object flags */
1434 HAS_LINENO
| HAS_DEBUG
|
1435 HAS_SYMS
| HAS_LOCALS
| WP_TEXT
| BFD_IS_RELAXABLE
),
1436 (SEC_HAS_CONTENTS
| SEC_ALLOC
| SEC_LOAD
| SEC_RELOC
), /* section flags */
1437 '_', /* symbol leading char */
1438 ' ', /* ar_pad_char */
1439 16, /* ar_max_namelen */
1440 2, /* minum align */
1441 bfd_getl64
, bfd_getl_signed_64
, bfd_putl64
,
1442 bfd_getl32
, bfd_getl_signed_32
, bfd_putl32
,
1443 bfd_getl16
, bfd_getl_signed_16
, bfd_putl16
, /* data */
1444 bfd_getl64
, bfd_getl_signed_64
, bfd_putl64
,
1445 bfd_getl32
, bfd_getl_signed_32
, bfd_putl32
,
1446 bfd_getl16
, bfd_getl_signed_16
, bfd_putl16
, /* hdrs */
1448 {_bfd_dummy_target
, b_out_object_p
, /* bfd_check_format */
1449 bfd_generic_archive_p
, _bfd_dummy_target
},
1450 {bfd_false
, b_out_mkobject
, /* bfd_set_format */
1451 _bfd_generic_mkarchive
, bfd_false
},
1452 {bfd_false
, b_out_write_object_contents
, /* bfd_write_contents */
1453 _bfd_write_archive_contents
, bfd_false
},
1454 JUMP_TABLE(aout_32
),