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 bfd_set_error (bfd_error_wrong_format
);
130 anexec
.a_info
= bfd_h_get_32 (abfd
, exec_bytes
.e_info
);
132 if (N_BADMAG (anexec
)) {
133 bfd_set_error (bfd_error_wrong_format
);
137 bout_swap_exec_header_in (abfd
, &exec_bytes
, &anexec
);
138 return aout_32_some_aout_object_p (abfd
, &anexec
, b_out_callback
);
142 /* Finish up the opening of a b.out file for reading. Fill in all the
143 fields that are not handled by common code. */
146 b_out_callback (abfd
)
149 struct internal_exec
*execp
= exec_hdr (abfd
);
150 unsigned long bss_start
;
152 /* Architecture and machine type */
153 bfd_set_arch_mach(abfd
,
154 bfd_arch_i960
, /* B.out only used on i960 */
155 bfd_mach_i960_core
/* Default */
158 /* The positions of the string table and symbol table. */
159 obj_str_filepos (abfd
) = N_STROFF (*execp
);
160 obj_sym_filepos (abfd
) = N_SYMOFF (*execp
);
162 /* The alignments of the sections */
163 obj_textsec (abfd
)->alignment_power
= execp
->a_talign
;
164 obj_datasec (abfd
)->alignment_power
= execp
->a_dalign
;
165 obj_bsssec (abfd
)->alignment_power
= execp
->a_balign
;
167 /* The starting addresses of the sections. */
168 obj_textsec (abfd
)->vma
= execp
->a_tload
;
169 obj_datasec (abfd
)->vma
= execp
->a_dload
;
171 /* And reload the sizes, since the aout module zaps them */
172 obj_textsec (abfd
)->_raw_size
= execp
->a_text
;
174 bss_start
= execp
->a_dload
+ execp
->a_data
; /* BSS = end of data section */
175 obj_bsssec (abfd
)->vma
= align_power (bss_start
, execp
->a_balign
);
177 /* The file positions of the sections */
178 obj_textsec (abfd
)->filepos
= N_TXTOFF(*execp
);
179 obj_datasec (abfd
)->filepos
= N_DATOFF(*execp
);
181 /* The file positions of the relocation info */
182 obj_textsec (abfd
)->rel_filepos
= N_TROFF(*execp
);
183 obj_datasec (abfd
)->rel_filepos
= N_DROFF(*execp
);
185 adata(abfd
).page_size
= 1; /* Not applicable. */
186 adata(abfd
).segment_size
= 1; /* Not applicable. */
187 adata(abfd
).exec_bytes_size
= EXEC_BYTES_SIZE
;
189 if (execp
->a_relaxable
)
190 abfd
->flags
|= BFD_IS_RELAXABLE
;
194 struct bout_data_struct
{
196 struct internal_exec e
;
200 b_out_mkobject (abfd
)
203 struct bout_data_struct
*rawptr
;
205 rawptr
= (struct bout_data_struct
*) bfd_zalloc (abfd
, sizeof (struct bout_data_struct
));
206 if (rawptr
== NULL
) {
207 bfd_set_error (bfd_error_no_memory
);
211 abfd
->tdata
.bout_data
= rawptr
;
212 exec_hdr (abfd
) = &rawptr
->e
;
214 /* For simplicity's sake we just make all the sections right here. */
215 obj_textsec (abfd
) = (asection
*)NULL
;
216 obj_datasec (abfd
) = (asection
*)NULL
;
217 obj_bsssec (abfd
) = (asection
*)NULL
;
219 bfd_make_section (abfd
, ".text");
220 bfd_make_section (abfd
, ".data");
221 bfd_make_section (abfd
, ".bss");
227 b_out_write_object_contents (abfd
)
230 struct external_exec swapped_hdr
;
232 exec_hdr (abfd
)->a_info
= BMAGIC
;
234 exec_hdr (abfd
)->a_text
= obj_textsec (abfd
)->_raw_size
;
235 exec_hdr (abfd
)->a_data
= obj_datasec (abfd
)->_raw_size
;
236 exec_hdr (abfd
)->a_bss
= obj_bsssec (abfd
)->_raw_size
;
237 exec_hdr (abfd
)->a_syms
= bfd_get_symcount (abfd
) * sizeof (struct nlist
);
238 exec_hdr (abfd
)->a_entry
= bfd_get_start_address (abfd
);
239 exec_hdr (abfd
)->a_trsize
= ((obj_textsec (abfd
)->reloc_count
) *
240 sizeof (struct relocation_info
));
241 exec_hdr (abfd
)->a_drsize
= ((obj_datasec (abfd
)->reloc_count
) *
242 sizeof (struct relocation_info
));
244 exec_hdr (abfd
)->a_talign
= obj_textsec (abfd
)->alignment_power
;
245 exec_hdr (abfd
)->a_dalign
= obj_datasec (abfd
)->alignment_power
;
246 exec_hdr (abfd
)->a_balign
= obj_bsssec (abfd
)->alignment_power
;
248 exec_hdr (abfd
)->a_tload
= obj_textsec (abfd
)->vma
;
249 exec_hdr (abfd
)->a_dload
= obj_datasec (abfd
)->vma
;
251 bout_swap_exec_header_out (abfd
, exec_hdr (abfd
), &swapped_hdr
);
253 bfd_seek (abfd
, (file_ptr
) 0, SEEK_SET
);
254 bfd_write ((PTR
) &swapped_hdr
, 1, EXEC_BYTES_SIZE
, abfd
);
256 /* Now write out reloc info, followed by syms and strings */
257 if (bfd_get_symcount (abfd
) != 0)
259 bfd_seek (abfd
, (file_ptr
)(N_SYMOFF(*exec_hdr(abfd
))), SEEK_SET
);
261 if (! aout_32_write_syms (abfd
))
264 bfd_seek (abfd
, (file_ptr
)(N_TROFF(*exec_hdr(abfd
))), SEEK_SET
);
266 if (!b_out_squirt_out_relocs (abfd
, obj_textsec (abfd
))) return false;
267 bfd_seek (abfd
, (file_ptr
)(N_DROFF(*exec_hdr(abfd
))), SEEK_SET
);
269 if (!b_out_squirt_out_relocs (abfd
, obj_datasec (abfd
))) return false;
274 /** Some reloc hackery */
276 #define CALLS 0x66003800 /* Template for 'calls' instruction */
277 #define BAL 0x0b000000 /* Template for 'bal' instruction */
278 #define BALX 0x85000000 /* Template for 'balx' instruction */
279 #define BAL_MASK 0x00ffffff
280 #define CALL 0x09000000
281 #define PCREL13_MASK 0x1fff
284 #define output_addr(sec) ((sec)->output_offset+(sec)->output_section->vma)
286 /* Magic to turn callx into calljx */
287 static bfd_reloc_status_type
288 calljx_callback (abfd
, link_info
, reloc_entry
, src
, dst
, input_section
)
290 struct bfd_link_info
*link_info
;
291 arelent
*reloc_entry
;
294 asection
*input_section
;
296 int word
= bfd_get_32 (abfd
, src
);
297 asymbol
*symbol_in
= *(reloc_entry
->sym_ptr_ptr
);
298 aout_symbol_type
*symbol
= aout_symbol (symbol_in
);
301 value
= get_value (reloc_entry
, link_info
, input_section
);
303 if (IS_CALLNAME (symbol
->other
))
305 aout_symbol_type
*balsym
= symbol
+1;
306 int inst
= bfd_get_32 (abfd
, (bfd_byte
*) src
-4);
307 /* The next symbol should be an N_BALNAME */
308 BFD_ASSERT (IS_BALNAME (balsym
->other
));
311 bfd_put_32 (abfd
, inst
, (bfd_byte
*) dst
-4);
313 value
= (symbol
->symbol
.value
314 + output_addr (symbol
->symbol
.section
));
317 word
+= value
+ reloc_entry
->addend
;
319 bfd_put_32(abfd
, word
, dst
);
324 /* Magic to turn call into callj */
325 static bfd_reloc_status_type
326 callj_callback (abfd
, link_info
, reloc_entry
, data
, srcidx
, dstidx
,
329 struct bfd_link_info
*link_info
;
330 arelent
*reloc_entry
;
334 asection
*input_section
;
336 int word
= bfd_get_32 (abfd
, (bfd_byte
*) data
+ srcidx
);
337 asymbol
*symbol_in
= *(reloc_entry
->sym_ptr_ptr
);
338 aout_symbol_type
*symbol
= aout_symbol (symbol_in
);
341 value
= get_value (reloc_entry
, link_info
, input_section
);
343 if (IS_OTHER(symbol
->other
))
345 /* Call to a system procedure - replace code with system
347 word
= CALLS
| (symbol
->other
- 1);
349 else if (IS_CALLNAME(symbol
->other
))
351 aout_symbol_type
*balsym
= symbol
+1;
353 /* The next symbol should be an N_BALNAME. */
354 BFD_ASSERT(IS_BALNAME(balsym
->other
));
356 /* We are calling a leaf, so replace the call instruction with a
359 + output_addr (balsym
->symbol
.section
)
360 + balsym
->symbol
.value
+ reloc_entry
->addend
362 - output_addr (input_section
))
367 word
= CALL
| (((word
& BAL_MASK
)
369 + reloc_entry
->addend
371 - output_addr (input_section
))
374 bfd_put_32(abfd
, word
, (bfd_byte
*) data
+ dstidx
);
378 /* type rshift size bitsize pcrel bitpos absolute overflow check*/
381 #define ABS32CODE_SHRUNK 1
386 #define ABS32_MAYBE_RELAXABLE 1
387 #define ABS32_WAS_RELAXABLE 2
391 static reloc_howto_type howto_reloc_callj
=
392 HOWTO(CALLJ
, 0, 2, 24, true, 0, complain_overflow_signed
, 0,"callj", true, 0x00ffffff, 0x00ffffff,false);
393 static reloc_howto_type howto_reloc_abs32
=
394 HOWTO(ABS32
, 0, 2, 32, false, 0, complain_overflow_bitfield
,0,"abs32", true, 0xffffffff,0xffffffff,false);
395 static reloc_howto_type howto_reloc_pcrel24
=
396 HOWTO(PCREL24
, 0, 2, 24, true, 0, complain_overflow_signed
,0,"pcrel24", true, 0x00ffffff,0x00ffffff,false);
398 static reloc_howto_type howto_reloc_pcrel13
=
399 HOWTO(PCREL13
, 0, 2, 13, true, 0, complain_overflow_signed
,0,"pcrel13", true, 0x00001fff,0x00001fff,false);
402 static reloc_howto_type howto_reloc_abs32codeshrunk
=
403 HOWTO(ABS32CODE_SHRUNK
, 0, 2, 24, true, 0, complain_overflow_signed
, 0,"callx->callj", true, 0x00ffffff, 0x00ffffff,false);
405 static reloc_howto_type howto_reloc_abs32code
=
406 HOWTO(ABS32CODE
, 0, 2, 32, false, 0, complain_overflow_bitfield
,0,"callx", true, 0xffffffff,0xffffffff,false);
408 static reloc_howto_type howto_align_table
[] = {
409 HOWTO (ALIGNER
, 0, 0x1, 0, false, 0, complain_overflow_dont
, 0, "align16", false, 0, 0, false),
410 HOWTO (ALIGNER
, 0, 0x3, 0, false, 0, complain_overflow_dont
, 0, "align32", false, 0, 0, false),
411 HOWTO (ALIGNER
, 0, 0x7, 0, false, 0, complain_overflow_dont
, 0, "align64", false, 0, 0, false),
412 HOWTO (ALIGNER
, 0, 0xf, 0, false, 0, complain_overflow_dont
, 0, "align128", false, 0, 0, false),
415 static reloc_howto_type howto_done_align_table
[] = {
416 HOWTO (ALIGNDONE
, 0x1, 0x1, 0, false, 0, complain_overflow_dont
, 0, "donealign16", false, 0, 0, false),
417 HOWTO (ALIGNDONE
, 0x3, 0x3, 0, false, 0, complain_overflow_dont
, 0, "donealign32", false, 0, 0, false),
418 HOWTO (ALIGNDONE
, 0x7, 0x7, 0, false, 0, complain_overflow_dont
, 0, "donealign64", false, 0, 0, false),
419 HOWTO (ALIGNDONE
, 0xf, 0xf, 0, false, 0, complain_overflow_dont
, 0, "donealign128", false, 0, 0, false),
422 static const reloc_howto_type
*
423 b_out_reloc_type_lookup (abfd
, code
)
425 bfd_reloc_code_real_type code
;
431 case BFD_RELOC_I960_CALLJ
:
432 return &howto_reloc_callj
;
434 return &howto_reloc_abs32
;
435 case BFD_RELOC_24_PCREL
:
436 return &howto_reloc_pcrel24
;
440 /* Allocate enough room for all the reloc entries, plus pointers to them all */
443 b_out_slurp_reloc_table (abfd
, asect
, symbols
)
448 register struct relocation_info
*rptr
;
449 unsigned int counter
;
451 int extern_mask
, pcrel_mask
, callj_mask
, length_shift
;
454 bfd_vma prev_addr
= 0;
457 struct relocation_info
*relocs
;
458 arelent
*reloc_cache
;
460 if (asect
->relocation
) return true;
461 if (!aout_32_slurp_symbol_table (abfd
)) return false;
463 if (asect
== obj_datasec (abfd
)) {
464 reloc_size
= exec_hdr(abfd
)->a_drsize
;
468 if (asect
== obj_textsec (abfd
)) {
469 reloc_size
= exec_hdr(abfd
)->a_trsize
;
473 bfd_set_error (bfd_error_invalid_operation
);
477 bfd_seek (abfd
, (file_ptr
)(asect
->rel_filepos
), SEEK_SET
);
478 count
= reloc_size
/ sizeof (struct relocation_info
);
480 relocs
= (struct relocation_info
*) malloc (reloc_size
);
481 if (!relocs
&& reloc_size
!= 0) {
482 bfd_set_error (bfd_error_no_memory
);
485 reloc_cache
= (arelent
*) malloc ((count
+1) * sizeof (arelent
));
487 free ((char*)relocs
);
488 bfd_set_error (bfd_error_no_memory
);
492 if (bfd_read ((PTR
) relocs
, 1, reloc_size
, abfd
) != reloc_size
) {
500 if (abfd
->xvec
->header_byteorder_big_p
) {
501 /* big-endian bit field allocation order */
509 /* little-endian bit field allocation order */
518 for (rptr
= relocs
, cache_ptr
= reloc_cache
, counter
= 0;
520 counter
++, rptr
++, cache_ptr
++)
522 unsigned char *raw
= (unsigned char *)rptr
;
524 cache_ptr
->address
= bfd_h_get_32 (abfd
, raw
+ 0);
525 cache_ptr
->howto
= 0;
526 if (abfd
->xvec
->header_byteorder_big_p
)
528 symnum
= (raw
[4] << 16) | (raw
[5] << 8) | raw
[6];
532 symnum
= (raw
[6] << 16) | (raw
[5] << 8) | raw
[4];
535 if (raw
[7] & extern_mask
)
537 /* if this is set then the r_index is a index into the symbol table;
538 * if the bit is not set then r_index contains a section map.
539 * we either fill in the sym entry with a pointer to the symbol,
540 * or point to the correct section
542 cache_ptr
->sym_ptr_ptr
= symbols
+ symnum
;
543 cache_ptr
->addend
= 0;
546 /* in a.out symbols are relative to the beginning of the
547 * file rather than sections ?
548 * (look in translate_from_native_sym_flags)
549 * the reloc entry addend has added to it the offset into the
550 * file of the data, so subtract the base to make the reloc
551 * section relative */
554 /* sign-extend symnum from 24 bits to whatever host uses */
559 cache_ptr
->sym_ptr_ptr
= (asymbol
**)NULL
;
564 cache_ptr
->sym_ptr_ptr
= obj_textsec(abfd
)->symbol_ptr_ptr
;
565 cache_ptr
->addend
= - obj_textsec(abfd
)->vma
;
569 cache_ptr
->sym_ptr_ptr
= obj_datasec(abfd
)->symbol_ptr_ptr
;
570 cache_ptr
->addend
= - obj_datasec(abfd
)->vma
;
574 cache_ptr
->sym_ptr_ptr
= obj_bsssec(abfd
)->symbol_ptr_ptr
;
575 cache_ptr
->addend
= - obj_bsssec(abfd
)->vma
;
579 cache_ptr
->sym_ptr_ptr
= obj_bsssec(abfd
)->symbol_ptr_ptr
;
580 cache_ptr
->addend
= 0;
582 case -2: /* .align */
583 if (raw
[7] & pcrel_mask
)
585 cache_ptr
->howto
= &howto_align_table
[(raw
[7] >> length_shift
) & 3];
586 cache_ptr
->sym_ptr_ptr
= &bfd_abs_symbol
;
593 cache_ptr
->addend
= 0;
602 /* the i960 only has a few relocation types:
603 abs 32-bit and pcrel 24bit. except for callj's! */
604 if (cache_ptr
->howto
!= 0)
606 else if (raw
[7] & callj_mask
)
608 cache_ptr
->howto
= &howto_reloc_callj
;
610 else if ( raw
[7] & pcrel_mask
)
612 if (raw
[7] & size_mask
)
613 cache_ptr
->howto
= &howto_reloc_pcrel13
;
615 cache_ptr
->howto
= &howto_reloc_pcrel24
;
619 if (raw
[7] & incode_mask
)
621 cache_ptr
->howto
= &howto_reloc_abs32code
;
625 cache_ptr
->howto
= &howto_reloc_abs32
;
628 if (cache_ptr
->address
< prev_addr
)
630 /* Ouch! this reloc is out of order, insert into the right place
633 arelent
*cursor
= cache_ptr
-1;
634 bfd_vma stop
= cache_ptr
->address
;
636 while (cursor
->address
> stop
&& cursor
>= reloc_cache
)
638 cursor
[1] = cursor
[0];
645 prev_addr
= cache_ptr
->address
;
651 asect
->relocation
= reloc_cache
;
652 asect
->reloc_count
= count
;
660 b_out_squirt_out_relocs (abfd
, section
)
669 unsigned int count
= section
->reloc_count
;
670 struct relocation_info
*native
, *natptr
;
671 size_t natsize
= count
* sizeof (struct relocation_info
);
672 int extern_mask
, pcrel_mask
, len_2
, callj_mask
;
673 if (count
== 0) return true;
674 generic
= section
->orelocation
;
675 native
= ((struct relocation_info
*) malloc (natsize
));
676 if (!native
&& natsize
!= 0) {
677 bfd_set_error (bfd_error_no_memory
);
681 if (abfd
->xvec
->header_byteorder_big_p
)
683 /* Big-endian bit field allocation order */
693 /* Little-endian bit field allocation order */
702 for (natptr
= native
; count
> 0; --count
, ++natptr
, ++generic
)
704 arelent
*g
= *generic
;
705 unsigned char *raw
= (unsigned char *)natptr
;
706 asymbol
*sym
= *(g
->sym_ptr_ptr
);
708 asection
*output_section
= sym
->section
->output_section
;
710 bfd_h_put_32(abfd
, g
->address
, raw
);
711 /* Find a type in the output format which matches the input howto -
712 * at the moment we assume input format == output format FIXME!!
715 /* FIXME: Need callj stuff here, and to check the howto entries to
716 be sure they are real for this architecture. */
717 if (g
->howto
== &howto_reloc_callj
)
719 raw
[7] = callj_mask
+ pcrel_mask
+ len_2
;
721 else if (g
->howto
== &howto_reloc_pcrel24
)
723 raw
[7] = pcrel_mask
+ len_2
;
725 else if (g
->howto
== &howto_reloc_pcrel13
)
727 raw
[7] = pcrel_mask
+ len_1
;
729 else if (g
->howto
== &howto_reloc_abs32code
)
731 raw
[7] = len_2
+ incode_mask
;
733 else if (g
->howto
>= howto_align_table
734 && g
->howto
<= (howto_align_table
735 + sizeof (howto_align_table
) / sizeof (howto_align_table
[0])
738 /* symnum == -2; extern_mask not set, pcrel_mask set */
742 | ((g
->howto
- howto_align_table
) << 1));
749 /* already mucked with r_extern, r_idx */;
750 else if (bfd_is_com_section (output_section
)
751 || output_section
== &bfd_abs_section
752 || output_section
== &bfd_und_section
)
755 if (bfd_abs_section
.symbol
== sym
)
757 /* Whoops, looked like an abs symbol, but is really an offset
758 from the abs section */
767 r_idx
= stoi((*(g
->sym_ptr_ptr
))->flags
);
772 /* Just an ordinary section */
774 r_idx
= output_section
->target_index
;
777 if (abfd
->xvec
->header_byteorder_big_p
) {
778 raw
[4] = (unsigned char) (r_idx
>> 16);
779 raw
[5] = (unsigned char) (r_idx
>> 8);
780 raw
[6] = (unsigned char) (r_idx
);
782 raw
[6] = (unsigned char) (r_idx
>> 16);
783 raw
[5] = (unsigned char) (r_idx
>> 8);
784 raw
[4] = (unsigned char) (r_idx
);
787 raw
[7] |= extern_mask
;
790 if (bfd_write ((PTR
) native
, 1, natsize
, abfd
) != natsize
) {
799 /* This is stupid. This function should be a boolean predicate */
801 b_out_canonicalize_reloc (abfd
, section
, relptr
, symbols
)
807 arelent
*tblptr
= section
->relocation
;
808 unsigned int count
= 0;
810 if (!(tblptr
|| b_out_slurp_reloc_table (abfd
, section
, symbols
))) return 0;
811 tblptr
= section
->relocation
;
812 if (!tblptr
) return 0;
814 for (; count
++ < section
->reloc_count
;)
815 *relptr
++ = tblptr
++;
819 return section
->reloc_count
;
823 b_out_get_reloc_upper_bound (abfd
, asect
)
827 if (bfd_get_format (abfd
) != bfd_object
) {
828 bfd_set_error (bfd_error_invalid_operation
);
832 if (asect
== obj_datasec (abfd
))
833 return (sizeof (arelent
*) *
834 ((exec_hdr(abfd
)->a_drsize
/ sizeof (struct relocation_info
))
837 if (asect
== obj_textsec (abfd
))
838 return (sizeof (arelent
*) *
839 ((exec_hdr(abfd
)->a_trsize
/ sizeof (struct relocation_info
))
842 if (asect
== obj_bsssec (abfd
))
845 bfd_set_error (bfd_error_invalid_operation
);
850 b_out_set_section_contents (abfd
, section
, location
, offset
, count
)
853 unsigned char *location
;
858 if (abfd
->output_has_begun
== false) { /* set by bfd.c handler */
859 if ((obj_textsec (abfd
) == NULL
) || (obj_datasec (abfd
) == NULL
) /*||
860 (obj_textsec (abfd)->_cooked_size == 0) || (obj_datasec (abfd)->_cooked_size == 0)*/) {
861 bfd_set_error (bfd_error_invalid_operation
);
865 obj_textsec (abfd
)->filepos
= sizeof(struct internal_exec
);
866 obj_datasec(abfd
)->filepos
= obj_textsec(abfd
)->filepos
867 + obj_textsec (abfd
)->_raw_size
;
870 /* regardless, once we know what we're doing, we might as well get going */
871 bfd_seek (abfd
, section
->filepos
+ offset
, SEEK_SET
);
874 return (bfd_write ((PTR
)location
, 1, count
, abfd
) == count
) ?true:false;
880 b_out_set_arch_mach (abfd
, arch
, machine
)
882 enum bfd_architecture arch
;
883 unsigned long machine
;
885 bfd_default_set_arch_mach(abfd
, arch
, machine
);
887 if (arch
== bfd_arch_unknown
) /* Unknown machine arch is OK */
889 if (arch
== bfd_arch_i960
) /* i960 default is OK */
891 case bfd_mach_i960_core
:
892 case bfd_mach_i960_kb_sb
:
893 case bfd_mach_i960_mc
:
894 case bfd_mach_i960_xa
:
895 case bfd_mach_i960_ca
:
896 case bfd_mach_i960_ka_sa
:
907 b_out_sizeof_headers (ignore_abfd
, ignore
)
911 return sizeof(struct internal_exec
);
916 /************************************************************************/
918 get_value (reloc
, link_info
, input_section
)
920 struct bfd_link_info
*link_info
;
921 asection
*input_section
;
924 asymbol
*symbol
= *(reloc
->sym_ptr_ptr
);
926 /* A symbol holds a pointer to a section, and an offset from the
927 base of the section. To relocate, we find where the section will
928 live in the output and add that in */
930 if (symbol
->section
== &bfd_und_section
)
932 struct bfd_link_hash_entry
*h
;
934 /* The symbol is undefined in this BFD. Look it up in the
935 global linker hash table. FIXME: This should be changed when
936 we convert b.out to use a specific final_link function and
937 change the interface to bfd_relax_section to not require the
939 h
= bfd_link_hash_lookup (link_info
->hash
, bfd_asymbol_name (symbol
),
941 if (h
!= (struct bfd_link_hash_entry
*) NULL
942 && h
->type
== bfd_link_hash_defined
)
943 value
= h
->u
.def
.value
+ output_addr (h
->u
.def
.section
);
944 else if (h
!= (struct bfd_link_hash_entry
*) NULL
945 && h
->type
== bfd_link_hash_common
)
949 if (! ((*link_info
->callbacks
->undefined_symbol
)
950 (link_info
, bfd_asymbol_name (symbol
),
951 input_section
->owner
, input_section
, reloc
->address
)))
958 value
= symbol
->value
+ output_addr (symbol
->section
);
961 /* Add the value contained in the relocation */
962 value
+= reloc
->addend
;
968 perform_slip (abfd
, slip
, input_section
, value
)
971 asection
*input_section
;
976 s
= _bfd_generic_link_get_symbols (abfd
);
977 BFD_ASSERT (s
!= (asymbol
**) NULL
);
979 /* Find all symbols past this point, and make them know
984 if (p
->section
== input_section
)
986 /* This was pointing into this section, so mangle it */
987 if (p
->value
> value
)
990 if (p
->udata
!= NULL
)
992 struct generic_link_hash_entry
*h
;
994 h
= (struct generic_link_hash_entry
*) p
->udata
;
995 BFD_ASSERT (h
->root
.type
== bfd_link_hash_defined
);
996 h
->root
.u
.def
.value
-= slip
;
997 BFD_ASSERT (h
->root
.u
.def
.value
== p
->value
);
1006 /* This routine works out if the thing we want to get to can be
1007 reached with a 24bit offset instead of a 32 bit one.
1008 If it can, then it changes the amode */
1011 abs32code (abfd
, input_section
, r
, shrink
, link_info
)
1013 asection
*input_section
;
1015 unsigned int shrink
;
1016 struct bfd_link_info
*link_info
;
1018 bfd_vma value
= get_value (r
, link_info
, input_section
);
1019 bfd_vma dot
= output_addr (input_section
) + r
->address
;
1022 /* See if the address we're looking at within 2^23 bytes of where
1023 we are, if so then we can use a small branch rather than the
1024 jump we were going to */
1026 gap
= value
- (dot
- shrink
);
1029 if (-1<<23 < (long)gap
&& (long)gap
< 1<<23 )
1031 /* Change the reloc type from 32bitcode possible 24, to 24bit
1034 r
->howto
= &howto_reloc_abs32codeshrunk
;
1035 /* The place to relc moves back by four bytes */
1038 /* This will be four bytes smaller in the long run */
1040 perform_slip (abfd
, 4, input_section
, r
->address
-shrink
+ 4);
1046 aligncode (abfd
, input_section
, r
, shrink
)
1048 asection
*input_section
;
1050 unsigned int shrink
;
1052 bfd_vma dot
= output_addr (input_section
) + r
->address
;
1057 int size
= r
->howto
->size
;
1059 /* Reduce the size of the alignment so that it's still aligned but
1060 smaller - the current size is already the same size as or bigger
1061 than the alignment required. */
1063 /* calculate the first byte following the padding before we optimize */
1064 old_end
= ((dot
+ size
) & ~size
) + size
+1;
1065 /* work out where the new end will be - remember that we're smaller
1066 than we used to be */
1067 new_end
= ((dot
- shrink
+ size
) & ~size
);
1069 /* This is the new end */
1070 gap
= old_end
- ((dot
+ size
) & ~size
);
1072 shrink_delta
= (old_end
- new_end
) - shrink
;
1076 /* Change the reloc so that it knows how far to align to */
1077 r
->howto
= howto_done_align_table
+ (r
->howto
- howto_align_table
);
1079 /* Encode the stuff into the addend - for future use we need to
1080 know how big the reloc used to be */
1081 r
->addend
= old_end
- dot
+ r
->address
;
1083 /* This will be N bytes smaller in the long run, adjust all the symbols */
1084 perform_slip (abfd
, shrink_delta
, input_section
, r
->address
- shrink
);
1085 shrink
+= shrink_delta
;
1091 b_out_relax_section (abfd
, i
, link_info
, again
)
1094 struct bfd_link_info
*link_info
;
1097 /* Get enough memory to hold the stuff */
1098 bfd
*input_bfd
= i
->owner
;
1099 asection
*input_section
= i
;
1101 arelent
**reloc_vector
= NULL
;
1102 bfd_size_type reloc_size
= bfd_get_reloc_upper_bound(input_bfd
,
1105 /* We only run this relaxation once. It might work to run it
1106 multiple times, but it hasn't been tested. */
1111 reloc_vector
= (arelent
**) malloc (reloc_size
);
1112 if (reloc_vector
== NULL
&& reloc_size
!= 0)
1114 bfd_set_error (bfd_error_no_memory
);
1118 /* Get the relocs and think about them */
1119 if (bfd_canonicalize_reloc(input_bfd
, input_section
, reloc_vector
,
1120 _bfd_generic_link_get_symbols (input_bfd
)))
1123 for (parent
= reloc_vector
; *parent
; parent
++)
1125 arelent
*r
= *parent
;
1126 switch (r
->howto
->type
)
1129 /* An alignment reloc */
1130 shrink
= aligncode (abfd
, input_section
, r
, shrink
);
1133 /* A 32bit reloc in an addressing mode */
1134 shrink
= abs32code (input_bfd
, input_section
, r
, shrink
,
1137 case ABS32CODE_SHRUNK
:
1144 input_section
->_cooked_size
= input_section
->_raw_size
- shrink
;
1146 if (reloc_vector
!= NULL
)
1147 free (reloc_vector
);
1150 if (reloc_vector
!= NULL
)
1151 free (reloc_vector
);
1156 b_out_get_relocated_section_contents (in_abfd
, link_info
, link_order
, data
,
1157 relocateable
, symbols
)
1159 struct bfd_link_info
*link_info
;
1160 struct bfd_link_order
*link_order
;
1162 boolean relocateable
;
1165 /* Get enough memory to hold the stuff */
1166 bfd
*input_bfd
= link_order
->u
.indirect
.section
->owner
;
1167 asection
*input_section
= link_order
->u
.indirect
.section
;
1168 bfd_size_type reloc_size
= bfd_get_reloc_upper_bound(input_bfd
,
1170 arelent
**reloc_vector
= NULL
;
1172 /* If producing relocateable output, don't bother to relax. */
1174 return bfd_generic_get_relocated_section_contents (in_abfd
, link_info
,
1179 reloc_vector
= (arelent
**) malloc (reloc_size
);
1180 if (reloc_vector
== NULL
&& reloc_size
!= 0)
1182 bfd_set_error (bfd_error_no_memory
);
1186 input_section
->reloc_done
= 1;
1188 /* read in the section */
1189 BFD_ASSERT (true == bfd_get_section_contents(input_bfd
,
1193 input_section
->_raw_size
));
1195 if (bfd_canonicalize_reloc(input_bfd
,
1200 arelent
**parent
= reloc_vector
;
1203 unsigned int dst_address
= 0;
1204 unsigned int src_address
= 0;
1208 /* Find how long a run we can do */
1209 while (dst_address
< link_order
->size
)
1214 /* Note that the relaxing didn't tie up the addresses in the
1215 relocation, so we use the original address to work out the
1216 run of non-relocated data */
1217 BFD_ASSERT (reloc
->address
>= src_address
);
1218 run
= reloc
->address
- src_address
;
1223 run
= link_order
->size
- dst_address
;
1225 /* Copy the bytes */
1226 for (idx
= 0; idx
< run
; idx
++)
1228 data
[dst_address
++] = data
[src_address
++];
1231 /* Now do the relocation */
1235 switch (reloc
->howto
->type
)
1238 calljx_callback (in_abfd
, link_info
, reloc
,
1239 src_address
+ data
, dst_address
+ data
,
1246 (bfd_get_32 (in_abfd
, data
+src_address
)
1247 + get_value (reloc
, link_info
, input_section
)),
1253 callj_callback (in_abfd
, link_info
, reloc
, data
, src_address
,
1254 dst_address
, input_section
);
1259 BFD_ASSERT (reloc
->addend
>= src_address
);
1260 BFD_ASSERT (reloc
->addend
<= input_section
->_raw_size
);
1261 src_address
= reloc
->addend
;
1262 dst_address
= ((dst_address
+ reloc
->howto
->size
)
1263 & ~reloc
->howto
->size
);
1265 case ABS32CODE_SHRUNK
:
1266 /* This used to be a callx, but we've found out that a
1267 callj will reach, so do the right thing. */
1268 callj_callback (in_abfd
, link_info
, reloc
, data
,
1269 src_address
+ 4, dst_address
, input_section
);
1275 long int word
= bfd_get_32(in_abfd
, data
+src_address
);
1278 value
= get_value (reloc
, link_info
, input_section
);
1279 word
= ((word
& ~BAL_MASK
)
1280 | (((word
& BAL_MASK
)
1282 - output_addr (input_section
)
1286 bfd_put_32(in_abfd
,word
, data
+dst_address
);
1295 long int word
= bfd_get_32(in_abfd
, data
+src_address
);
1298 value
= get_value (reloc
, link_info
, input_section
);
1299 word
= ((word
& ~PCREL13_MASK
)
1300 | (((word
& PCREL13_MASK
)
1303 - output_addr (input_section
))
1306 bfd_put_32(in_abfd
,word
, data
+dst_address
);
1319 if (reloc_vector
!= NULL
)
1320 free (reloc_vector
);
1323 if (reloc_vector
!= NULL
)
1324 free (reloc_vector
);
1327 /***********************************************************************/
1329 /* Build the transfer vectors for Big and Little-Endian B.OUT files. */
1331 /* We don't have core files. */
1332 #define aout_32_core_file_failing_command _bfd_dummy_core_file_failing_command
1333 #define aout_32_core_file_failing_signal _bfd_dummy_core_file_failing_signal
1334 #define aout_32_core_file_matches_executable_p \
1335 _bfd_dummy_core_file_matches_executable_p
1337 /* We use BSD-Unix generic archive files. */
1338 #define aout_32_openr_next_archived_file bfd_generic_openr_next_archived_file
1339 #define aout_32_generic_stat_arch_elt bfd_generic_stat_arch_elt
1340 #define aout_32_slurp_armap bfd_slurp_bsd_armap
1341 #define aout_32_slurp_extended_name_table _bfd_slurp_extended_name_table
1342 #define aout_32_write_armap bsd_write_armap
1343 #define aout_32_truncate_arname bfd_bsd_truncate_arname
1345 /* We override these routines from the usual a.out file routines. */
1346 #define aout_32_canonicalize_reloc b_out_canonicalize_reloc
1347 #define aout_32_get_reloc_upper_bound b_out_get_reloc_upper_bound
1348 #define aout_32_set_section_contents b_out_set_section_contents
1349 #define aout_32_set_arch_mach b_out_set_arch_mach
1350 #define aout_32_sizeof_headers b_out_sizeof_headers
1352 #define aout_32_bfd_debug_info_start bfd_void
1353 #define aout_32_bfd_debug_info_end bfd_void
1354 #define aout_32_bfd_debug_info_accumulate (PROTO(void,(*),(bfd*, struct sec *))) bfd_void
1356 #define aout_32_bfd_get_relocated_section_contents b_out_get_relocated_section_contents
1357 #define aout_32_bfd_relax_section b_out_relax_section
1358 #define aout_32_bfd_reloc_type_lookup b_out_reloc_type_lookup
1359 #define aout_32_bfd_make_debug_symbol \
1360 ((asymbol *(*) PARAMS ((bfd *, void *, unsigned long))) bfd_nullvoidptr)
1361 #define aout_32_bfd_link_hash_table_create _bfd_generic_link_hash_table_create
1362 #define aout_32_bfd_link_add_symbols _bfd_generic_link_add_symbols
1363 #define aout_32_bfd_final_link _bfd_generic_final_link
1365 bfd_target b_out_vec_big_host
=
1367 "b.out.big", /* name */
1368 bfd_target_aout_flavour
,
1369 false, /* data byte order is little */
1370 true, /* hdr byte order is big */
1371 (HAS_RELOC
| EXEC_P
| /* object flags */
1372 HAS_LINENO
| HAS_DEBUG
|
1373 HAS_SYMS
| HAS_LOCALS
| WP_TEXT
| BFD_IS_RELAXABLE
),
1374 (SEC_HAS_CONTENTS
| SEC_ALLOC
| SEC_LOAD
| SEC_RELOC
), /* section flags */
1375 '_', /* symbol leading char */
1376 ' ', /* ar_pad_char */
1377 16, /* ar_max_namelen */
1378 2, /* minumum alignment power */
1380 bfd_getl64
, bfd_getl_signed_64
, bfd_putl64
,
1381 bfd_getl32
, bfd_getl_signed_32
, bfd_putl32
,
1382 bfd_getl16
, bfd_getl_signed_16
, bfd_putl16
, /* data */
1383 bfd_getb64
, bfd_getb_signed_64
, bfd_putb64
,
1384 bfd_getb32
, bfd_getb_signed_32
, bfd_putb32
,
1385 bfd_getb16
, bfd_getb_signed_16
, bfd_putb16
, /* hdrs */
1386 {_bfd_dummy_target
, b_out_object_p
, /* bfd_check_format */
1387 bfd_generic_archive_p
, _bfd_dummy_target
},
1388 {bfd_false
, b_out_mkobject
, /* bfd_set_format */
1389 _bfd_generic_mkarchive
, bfd_false
},
1390 {bfd_false
, b_out_write_object_contents
, /* bfd_write_contents */
1391 _bfd_write_archive_contents
, bfd_false
},
1393 JUMP_TABLE(aout_32
),
1398 bfd_target b_out_vec_little_host
=
1400 "b.out.little", /* name */
1401 bfd_target_aout_flavour
,
1402 false, /* data byte order is little */
1403 false, /* header byte order is little */
1404 (HAS_RELOC
| EXEC_P
| /* object flags */
1405 HAS_LINENO
| HAS_DEBUG
|
1406 HAS_SYMS
| HAS_LOCALS
| WP_TEXT
| BFD_IS_RELAXABLE
),
1407 (SEC_HAS_CONTENTS
| SEC_ALLOC
| SEC_LOAD
| SEC_RELOC
), /* section flags */
1408 '_', /* symbol leading char */
1409 ' ', /* ar_pad_char */
1410 16, /* ar_max_namelen */
1411 2, /* minum align */
1412 bfd_getl64
, bfd_getl_signed_64
, bfd_putl64
,
1413 bfd_getl32
, bfd_getl_signed_32
, bfd_putl32
,
1414 bfd_getl16
, bfd_getl_signed_16
, bfd_putl16
, /* data */
1415 bfd_getl64
, bfd_getl_signed_64
, bfd_putl64
,
1416 bfd_getl32
, bfd_getl_signed_32
, bfd_putl32
,
1417 bfd_getl16
, bfd_getl_signed_16
, bfd_putl16
, /* hdrs */
1419 {_bfd_dummy_target
, b_out_object_p
, /* bfd_check_format */
1420 bfd_generic_archive_p
, _bfd_dummy_target
},
1421 {bfd_false
, b_out_mkobject
, /* bfd_set_format */
1422 _bfd_generic_mkarchive
, bfd_false
},
1423 {bfd_false
, b_out_write_object_contents
, /* bfd_write_contents */
1424 _bfd_write_archive_contents
, bfd_false
},
1425 JUMP_TABLE(aout_32
),