1 /* BFD back-end for Intel 960 b.out binaries.
2 Copyright 1990, 91, 92, 93, 94, 95, 1996 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, 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 const 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
*, boolean
));
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_bfd_relax_section
PARAMS ((bfd
*, asection
*,
50 struct bfd_link_info
*,
52 static bfd_byte
*b_out_bfd_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
;
117 static const bfd_target
*
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. */
146 static const bfd_target
*
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 obj_textsec (abfd
)->lma
= obj_textsec (abfd
)->vma
;
173 obj_datasec (abfd
)->lma
= obj_datasec (abfd
)->vma
;
175 /* And reload the sizes, since the aout module zaps them */
176 obj_textsec (abfd
)->_raw_size
= execp
->a_text
;
178 bss_start
= execp
->a_dload
+ execp
->a_data
; /* BSS = end of data section */
179 obj_bsssec (abfd
)->vma
= align_power (bss_start
, execp
->a_balign
);
181 obj_bsssec (abfd
)->lma
= obj_bsssec (abfd
)->vma
;
183 /* The file positions of the sections */
184 obj_textsec (abfd
)->filepos
= N_TXTOFF(*execp
);
185 obj_datasec (abfd
)->filepos
= N_DATOFF(*execp
);
187 /* The file positions of the relocation info */
188 obj_textsec (abfd
)->rel_filepos
= N_TROFF(*execp
);
189 obj_datasec (abfd
)->rel_filepos
= N_DROFF(*execp
);
191 adata(abfd
).page_size
= 1; /* Not applicable. */
192 adata(abfd
).segment_size
= 1; /* Not applicable. */
193 adata(abfd
).exec_bytes_size
= EXEC_BYTES_SIZE
;
195 if (execp
->a_relaxable
)
196 abfd
->flags
|= BFD_IS_RELAXABLE
;
200 struct bout_data_struct
{
202 struct internal_exec e
;
206 b_out_mkobject (abfd
)
209 struct bout_data_struct
*rawptr
;
211 rawptr
= (struct bout_data_struct
*) bfd_zalloc (abfd
, sizeof (struct bout_data_struct
));
215 abfd
->tdata
.bout_data
= rawptr
;
216 exec_hdr (abfd
) = &rawptr
->e
;
218 obj_textsec (abfd
) = (asection
*)NULL
;
219 obj_datasec (abfd
) = (asection
*)NULL
;
220 obj_bsssec (abfd
) = (asection
*)NULL
;
226 b_out_symbol_cmp (a
, b
)
227 struct aout_symbol
**a
, **b
;
232 /* Primary key is address */
233 sec
= bfd_get_section (&(*a
)->symbol
);
234 av
= sec
->output_section
->vma
+ sec
->output_offset
+ (*a
)->symbol
.value
;
235 sec
= bfd_get_section (&(*b
)->symbol
);
236 bv
= sec
->output_section
->vma
+ sec
->output_offset
+ (*b
)->symbol
.value
;
243 /* Secondary key puts CALLNAME syms last and BALNAME syms first, so
244 that they have the best chance of being contiguous. */
245 if (IS_BALNAME ((*a
)->other
) || IS_CALLNAME ((*b
)->other
))
247 if (IS_CALLNAME ((*a
)->other
) || IS_BALNAME ((*b
)->other
))
254 b_out_write_object_contents (abfd
)
257 struct external_exec swapped_hdr
;
259 if (! aout_32_make_sections (abfd
))
262 exec_hdr (abfd
)->a_info
= BMAGIC
;
264 exec_hdr (abfd
)->a_text
= obj_textsec (abfd
)->_raw_size
;
265 exec_hdr (abfd
)->a_data
= obj_datasec (abfd
)->_raw_size
;
266 exec_hdr (abfd
)->a_bss
= obj_bsssec (abfd
)->_raw_size
;
267 exec_hdr (abfd
)->a_syms
= bfd_get_symcount (abfd
) * sizeof (struct nlist
);
268 exec_hdr (abfd
)->a_entry
= bfd_get_start_address (abfd
);
269 exec_hdr (abfd
)->a_trsize
= ((obj_textsec (abfd
)->reloc_count
) *
270 sizeof (struct relocation_info
));
271 exec_hdr (abfd
)->a_drsize
= ((obj_datasec (abfd
)->reloc_count
) *
272 sizeof (struct relocation_info
));
274 exec_hdr (abfd
)->a_talign
= obj_textsec (abfd
)->alignment_power
;
275 exec_hdr (abfd
)->a_dalign
= obj_datasec (abfd
)->alignment_power
;
276 exec_hdr (abfd
)->a_balign
= obj_bsssec (abfd
)->alignment_power
;
278 exec_hdr (abfd
)->a_tload
= obj_textsec (abfd
)->vma
;
279 exec_hdr (abfd
)->a_dload
= obj_datasec (abfd
)->vma
;
281 bout_swap_exec_header_out (abfd
, exec_hdr (abfd
), &swapped_hdr
);
283 if (bfd_seek (abfd
, (file_ptr
) 0, SEEK_SET
) != 0
284 || (bfd_write ((PTR
) &swapped_hdr
, 1, EXEC_BYTES_SIZE
, abfd
)
288 /* Now write out reloc info, followed by syms and strings */
289 if (bfd_get_symcount (abfd
) != 0)
291 /* Make sure {CALL,BAL}NAME symbols remain adjacent on output
292 by sorting. This is complicated by the fact that stabs are
293 also ordered. Solve this by shifting all stabs to the end
294 in order, then sorting the rest. */
296 asymbol
**outsyms
, **p
, **q
;
298 outsyms
= bfd_get_outsymbols (abfd
);
299 p
= outsyms
+ bfd_get_symcount (abfd
);
301 for (q
= p
--; p
>= outsyms
; p
--)
303 if ((*p
)->flags
& BSF_DEBUGGING
)
312 qsort (outsyms
, q
- outsyms
, sizeof(asymbol
*), b_out_symbol_cmp
);
314 /* Back to your regularly scheduled program. */
316 if (bfd_seek (abfd
, (file_ptr
)(N_SYMOFF(*exec_hdr(abfd
))), SEEK_SET
)
320 if (! aout_32_write_syms (abfd
))
323 if (bfd_seek (abfd
, (file_ptr
)(N_TROFF(*exec_hdr(abfd
))), SEEK_SET
) != 0)
326 if (!b_out_squirt_out_relocs (abfd
, obj_textsec (abfd
))) return false;
327 if (bfd_seek (abfd
, (file_ptr
)(N_DROFF(*exec_hdr(abfd
))), SEEK_SET
)
331 if (!b_out_squirt_out_relocs (abfd
, obj_datasec (abfd
))) return false;
336 /** Some reloc hackery */
338 #define CALLS 0x66003800 /* Template for 'calls' instruction */
339 #define BAL 0x0b000000 /* Template for 'bal' instruction */
340 #define BAL_MASK 0x00ffffff
341 #define BALX 0x85f00000 /* Template for 'balx' instruction */
342 #define BALX_MASK 0x0007ffff
343 #define CALL 0x09000000
344 #define PCREL13_MASK 0x1fff
347 #define output_addr(sec) ((sec)->output_offset+(sec)->output_section->vma)
349 /* Magic to turn callx into calljx */
350 static bfd_reloc_status_type
351 calljx_callback (abfd
, link_info
, reloc_entry
, src
, dst
, input_section
)
353 struct bfd_link_info
*link_info
;
354 arelent
*reloc_entry
;
357 asection
*input_section
;
359 int word
= bfd_get_32 (abfd
, src
);
360 asymbol
*symbol_in
= *(reloc_entry
->sym_ptr_ptr
);
361 aout_symbol_type
*symbol
= aout_symbol (symbol_in
);
364 value
= get_value (reloc_entry
, link_info
, input_section
);
366 if (IS_CALLNAME (symbol
->other
))
368 aout_symbol_type
*balsym
= symbol
+1;
369 int inst
= bfd_get_32 (abfd
, (bfd_byte
*) src
-4);
370 /* The next symbol should be an N_BALNAME */
371 BFD_ASSERT (IS_BALNAME (balsym
->other
));
374 bfd_put_32 (abfd
, inst
, (bfd_byte
*) dst
-4);
376 value
= (symbol
->symbol
.value
377 + output_addr (symbol
->symbol
.section
));
380 word
+= value
+ reloc_entry
->addend
;
382 bfd_put_32(abfd
, word
, dst
);
387 /* Magic to turn call into callj */
388 static bfd_reloc_status_type
389 callj_callback (abfd
, link_info
, reloc_entry
, data
, srcidx
, dstidx
,
390 input_section
, shrinking
)
392 struct bfd_link_info
*link_info
;
393 arelent
*reloc_entry
;
397 asection
*input_section
;
400 int word
= bfd_get_32 (abfd
, (bfd_byte
*) data
+ srcidx
);
401 asymbol
*symbol_in
= *(reloc_entry
->sym_ptr_ptr
);
402 aout_symbol_type
*symbol
= aout_symbol (symbol_in
);
405 value
= get_value (reloc_entry
, link_info
, input_section
);
407 if (IS_OTHER(symbol
->other
))
409 /* Call to a system procedure - replace code with system
411 word
= CALLS
| (symbol
->other
- 1);
413 else if (IS_CALLNAME(symbol
->other
))
415 aout_symbol_type
*balsym
= symbol
+1;
417 /* The next symbol should be an N_BALNAME. */
418 BFD_ASSERT(IS_BALNAME(balsym
->other
));
420 /* We are calling a leaf, so replace the call instruction with a
423 + output_addr (balsym
->symbol
.section
)
424 + balsym
->symbol
.value
+ reloc_entry
->addend
426 - output_addr (input_section
))
429 else if ((symbol
->symbol
.flags
& BSF_SECTION_SYM
) != 0)
431 /* A callj against a symbol in the same section is a fully
432 resolved relative call. We don't need to do anything here.
433 If the symbol is not in the same section, I'm not sure what
434 to do; fortunately, this case will probably never arise. */
435 BFD_ASSERT (! shrinking
);
436 BFD_ASSERT (symbol
->symbol
.section
== input_section
);
440 word
= CALL
| (((word
& BAL_MASK
)
442 + reloc_entry
->addend
443 - (shrinking
? dstidx
: 0)
444 - output_addr (input_section
))
447 bfd_put_32(abfd
, word
, (bfd_byte
*) data
+ dstidx
);
451 /* type rshift size bitsize pcrel bitpos absolute overflow check*/
454 #define ABS32CODE_SHRUNK 1
459 #define ABS32_MAYBE_RELAXABLE 1
460 #define ABS32_WAS_RELAXABLE 2
464 static reloc_howto_type howto_reloc_callj
=
465 HOWTO(CALLJ
, 0, 2, 24, true, 0, complain_overflow_signed
, 0,"callj", true, 0x00ffffff, 0x00ffffff,false);
466 static reloc_howto_type howto_reloc_abs32
=
467 HOWTO(ABS32
, 0, 2, 32, false, 0, complain_overflow_bitfield
,0,"abs32", true, 0xffffffff,0xffffffff,false);
468 static reloc_howto_type howto_reloc_pcrel24
=
469 HOWTO(PCREL24
, 0, 2, 24, true, 0, complain_overflow_signed
,0,"pcrel24", true, 0x00ffffff,0x00ffffff,false);
471 static reloc_howto_type howto_reloc_pcrel13
=
472 HOWTO(PCREL13
, 0, 2, 13, true, 0, complain_overflow_signed
,0,"pcrel13", true, 0x00001fff,0x00001fff,false);
475 static reloc_howto_type howto_reloc_abs32codeshrunk
=
476 HOWTO(ABS32CODE_SHRUNK
, 0, 2, 24, true, 0, complain_overflow_signed
, 0,"callx->callj", true, 0x00ffffff, 0x00ffffff,false);
478 static reloc_howto_type howto_reloc_abs32code
=
479 HOWTO(ABS32CODE
, 0, 2, 32, false, 0, complain_overflow_bitfield
,0,"callx", true, 0xffffffff,0xffffffff,false);
481 static reloc_howto_type howto_align_table
[] = {
482 HOWTO (ALIGNER
, 0, 0x1, 0, false, 0, complain_overflow_dont
, 0, "align16", false, 0, 0, false),
483 HOWTO (ALIGNER
, 0, 0x3, 0, false, 0, complain_overflow_dont
, 0, "align32", false, 0, 0, false),
484 HOWTO (ALIGNER
, 0, 0x7, 0, false, 0, complain_overflow_dont
, 0, "align64", false, 0, 0, false),
485 HOWTO (ALIGNER
, 0, 0xf, 0, false, 0, complain_overflow_dont
, 0, "align128", false, 0, 0, false),
488 static reloc_howto_type howto_done_align_table
[] = {
489 HOWTO (ALIGNDONE
, 0x1, 0x1, 0, false, 0, complain_overflow_dont
, 0, "donealign16", false, 0, 0, false),
490 HOWTO (ALIGNDONE
, 0x3, 0x3, 0, false, 0, complain_overflow_dont
, 0, "donealign32", false, 0, 0, false),
491 HOWTO (ALIGNDONE
, 0x7, 0x7, 0, false, 0, complain_overflow_dont
, 0, "donealign64", false, 0, 0, false),
492 HOWTO (ALIGNDONE
, 0xf, 0xf, 0, false, 0, complain_overflow_dont
, 0, "donealign128", false, 0, 0, false),
495 static reloc_howto_type
*
496 b_out_bfd_reloc_type_lookup (abfd
, code
)
498 bfd_reloc_code_real_type code
;
504 case BFD_RELOC_I960_CALLJ
:
505 return &howto_reloc_callj
;
508 return &howto_reloc_abs32
;
509 case BFD_RELOC_24_PCREL
:
510 return &howto_reloc_pcrel24
;
514 /* Allocate enough room for all the reloc entries, plus pointers to them all */
517 b_out_slurp_reloc_table (abfd
, asect
, symbols
)
522 register struct relocation_info
*rptr
;
523 unsigned int counter
;
525 int extern_mask
, pcrel_mask
, callj_mask
, length_shift
;
528 bfd_vma prev_addr
= 0;
531 struct relocation_info
*relocs
;
532 arelent
*reloc_cache
;
534 if (asect
->relocation
)
536 if (!aout_32_slurp_symbol_table (abfd
))
539 if (asect
== obj_datasec (abfd
)) {
540 reloc_size
= exec_hdr(abfd
)->a_drsize
;
544 if (asect
== obj_textsec (abfd
)) {
545 reloc_size
= exec_hdr(abfd
)->a_trsize
;
549 if (asect
== obj_bsssec (abfd
)) {
554 bfd_set_error (bfd_error_invalid_operation
);
558 if (bfd_seek (abfd
, (file_ptr
)(asect
->rel_filepos
), SEEK_SET
) != 0)
560 count
= reloc_size
/ sizeof (struct relocation_info
);
562 relocs
= (struct relocation_info
*) bfd_malloc (reloc_size
);
563 if (!relocs
&& reloc_size
!= 0)
565 reloc_cache
= (arelent
*) bfd_malloc ((count
+1) * sizeof (arelent
));
568 free ((char*)relocs
);
572 if (bfd_read ((PTR
) relocs
, 1, reloc_size
, abfd
) != reloc_size
) {
581 if (bfd_header_big_endian (abfd
)) {
582 /* big-endian bit field allocation order */
590 /* little-endian bit field allocation order */
599 for (rptr
= relocs
, cache_ptr
= reloc_cache
, counter
= 0;
601 counter
++, rptr
++, cache_ptr
++)
603 unsigned char *raw
= (unsigned char *)rptr
;
605 cache_ptr
->address
= bfd_h_get_32 (abfd
, raw
+ 0);
606 cache_ptr
->howto
= 0;
607 if (bfd_header_big_endian (abfd
))
609 symnum
= (raw
[4] << 16) | (raw
[5] << 8) | raw
[6];
613 symnum
= (raw
[6] << 16) | (raw
[5] << 8) | raw
[4];
616 if (raw
[7] & extern_mask
)
618 /* if this is set then the r_index is a index into the symbol table;
619 * if the bit is not set then r_index contains a section map.
620 * we either fill in the sym entry with a pointer to the symbol,
621 * or point to the correct section
623 cache_ptr
->sym_ptr_ptr
= symbols
+ symnum
;
624 cache_ptr
->addend
= 0;
627 /* in a.out symbols are relative to the beginning of the
628 * file rather than sections ?
629 * (look in translate_from_native_sym_flags)
630 * the reloc entry addend has added to it the offset into the
631 * file of the data, so subtract the base to make the reloc
632 * section relative */
635 /* sign-extend symnum from 24 bits to whatever host uses */
640 cache_ptr
->sym_ptr_ptr
= (asymbol
**)NULL
;
645 cache_ptr
->sym_ptr_ptr
= obj_textsec(abfd
)->symbol_ptr_ptr
;
646 cache_ptr
->addend
= - obj_textsec(abfd
)->vma
;
650 cache_ptr
->sym_ptr_ptr
= obj_datasec(abfd
)->symbol_ptr_ptr
;
651 cache_ptr
->addend
= - obj_datasec(abfd
)->vma
;
655 cache_ptr
->sym_ptr_ptr
= obj_bsssec(abfd
)->symbol_ptr_ptr
;
656 cache_ptr
->addend
= - obj_bsssec(abfd
)->vma
;
660 cache_ptr
->sym_ptr_ptr
= obj_bsssec(abfd
)->symbol_ptr_ptr
;
661 cache_ptr
->addend
= 0;
663 case -2: /* .align */
664 if (raw
[7] & pcrel_mask
)
666 cache_ptr
->howto
= &howto_align_table
[(raw
[7] >> length_shift
) & 3];
667 cache_ptr
->sym_ptr_ptr
= bfd_abs_section_ptr
->symbol_ptr_ptr
;
674 cache_ptr
->addend
= 0;
683 /* the i960 only has a few relocation types:
684 abs 32-bit and pcrel 24bit. except for callj's! */
685 if (cache_ptr
->howto
!= 0)
687 else if (raw
[7] & callj_mask
)
689 cache_ptr
->howto
= &howto_reloc_callj
;
691 else if ( raw
[7] & pcrel_mask
)
693 if (raw
[7] & size_mask
)
694 cache_ptr
->howto
= &howto_reloc_pcrel13
;
696 cache_ptr
->howto
= &howto_reloc_pcrel24
;
700 if (raw
[7] & incode_mask
)
702 cache_ptr
->howto
= &howto_reloc_abs32code
;
706 cache_ptr
->howto
= &howto_reloc_abs32
;
709 if (cache_ptr
->address
< prev_addr
)
711 /* Ouch! this reloc is out of order, insert into the right place
714 arelent
*cursor
= cache_ptr
-1;
715 bfd_vma stop
= cache_ptr
->address
;
717 while (cursor
->address
> stop
&& cursor
>= reloc_cache
)
719 cursor
[1] = cursor
[0];
726 prev_addr
= cache_ptr
->address
;
733 asect
->relocation
= reloc_cache
;
734 asect
->reloc_count
= count
;
742 b_out_squirt_out_relocs (abfd
, section
)
751 unsigned int count
= section
->reloc_count
;
752 struct relocation_info
*native
, *natptr
;
753 size_t natsize
= count
* sizeof (struct relocation_info
);
754 int extern_mask
, pcrel_mask
, len_2
, callj_mask
;
755 if (count
== 0) return true;
756 generic
= section
->orelocation
;
757 native
= ((struct relocation_info
*) bfd_malloc (natsize
));
758 if (!native
&& natsize
!= 0)
761 if (bfd_header_big_endian (abfd
))
763 /* Big-endian bit field allocation order */
773 /* Little-endian bit field allocation order */
782 for (natptr
= native
; count
> 0; --count
, ++natptr
, ++generic
)
784 arelent
*g
= *generic
;
785 unsigned char *raw
= (unsigned char *)natptr
;
786 asymbol
*sym
= *(g
->sym_ptr_ptr
);
788 asection
*output_section
= sym
->section
->output_section
;
790 bfd_h_put_32(abfd
, g
->address
, raw
);
791 /* Find a type in the output format which matches the input howto -
792 * at the moment we assume input format == output format FIXME!!
795 /* FIXME: Need callj stuff here, and to check the howto entries to
796 be sure they are real for this architecture. */
797 if (g
->howto
== &howto_reloc_callj
)
799 raw
[7] = callj_mask
+ pcrel_mask
+ len_2
;
801 else if (g
->howto
== &howto_reloc_pcrel24
)
803 raw
[7] = pcrel_mask
+ len_2
;
805 else if (g
->howto
== &howto_reloc_pcrel13
)
807 raw
[7] = pcrel_mask
+ len_1
;
809 else if (g
->howto
== &howto_reloc_abs32code
)
811 raw
[7] = len_2
+ incode_mask
;
813 else if (g
->howto
>= howto_align_table
814 && g
->howto
<= (howto_align_table
815 + sizeof (howto_align_table
) / sizeof (howto_align_table
[0])
818 /* symnum == -2; extern_mask not set, pcrel_mask set */
822 | ((g
->howto
- howto_align_table
) << 1));
829 /* already mucked with r_extern, r_idx */;
830 else if (bfd_is_com_section (output_section
)
831 || bfd_is_abs_section (output_section
)
832 || bfd_is_und_section (output_section
))
835 if (bfd_abs_section_ptr
->symbol
== sym
)
837 /* Whoops, looked like an abs symbol, but is really an offset
838 from the abs section */
847 r_idx
= (*g
->sym_ptr_ptr
)->udata
.i
;
852 /* Just an ordinary section */
854 r_idx
= output_section
->target_index
;
857 if (bfd_header_big_endian (abfd
)) {
858 raw
[4] = (unsigned char) (r_idx
>> 16);
859 raw
[5] = (unsigned char) (r_idx
>> 8);
860 raw
[6] = (unsigned char) (r_idx
);
862 raw
[6] = (unsigned char) (r_idx
>> 16);
863 raw
[5] = (unsigned char) (r_idx
>> 8);
864 raw
[4] = (unsigned char) (r_idx
);
867 raw
[7] |= extern_mask
;
870 if (bfd_write ((PTR
) native
, 1, natsize
, abfd
) != natsize
) {
879 /* This is stupid. This function should be a boolean predicate */
881 b_out_canonicalize_reloc (abfd
, section
, relptr
, symbols
)
890 if ((section
->flags
& SEC_CONSTRUCTOR
) != 0)
892 arelent_chain
*chain
= section
->constructor_chain
;
893 for (count
= 0; count
< section
->reloc_count
; count
++)
895 *relptr
++ = &chain
->relent
;
901 if (section
->relocation
== NULL
902 && ! b_out_slurp_reloc_table (abfd
, section
, symbols
))
905 tblptr
= section
->relocation
;
906 for (count
= 0; count
++ < section
->reloc_count
;)
907 *relptr
++ = tblptr
++;
912 return section
->reloc_count
;
916 b_out_get_reloc_upper_bound (abfd
, asect
)
920 if (bfd_get_format (abfd
) != bfd_object
) {
921 bfd_set_error (bfd_error_invalid_operation
);
925 if (asect
->flags
& SEC_CONSTRUCTOR
)
926 return sizeof (arelent
*) * (asect
->reloc_count
+ 1);
928 if (asect
== obj_datasec (abfd
))
929 return (sizeof (arelent
*) *
930 ((exec_hdr(abfd
)->a_drsize
/ sizeof (struct relocation_info
))
933 if (asect
== obj_textsec (abfd
))
934 return (sizeof (arelent
*) *
935 ((exec_hdr(abfd
)->a_trsize
/ sizeof (struct relocation_info
))
938 if (asect
== obj_bsssec (abfd
))
941 bfd_set_error (bfd_error_invalid_operation
);
946 b_out_set_section_contents (abfd
, section
, location
, offset
, count
)
954 if (abfd
->output_has_begun
== false) { /* set by bfd.c handler */
955 if (! aout_32_make_sections (abfd
))
958 obj_textsec (abfd
)->filepos
= sizeof(struct internal_exec
);
959 obj_datasec(abfd
)->filepos
= obj_textsec(abfd
)->filepos
960 + obj_textsec (abfd
)->_raw_size
;
963 /* regardless, once we know what we're doing, we might as well get going */
964 if (bfd_seek (abfd
, section
->filepos
+ offset
, SEEK_SET
) != 0)
968 return (bfd_write ((PTR
)location
, 1, count
, abfd
) == count
) ?true:false;
974 b_out_set_arch_mach (abfd
, arch
, machine
)
976 enum bfd_architecture arch
;
977 unsigned long machine
;
979 bfd_default_set_arch_mach(abfd
, arch
, machine
);
981 if (arch
== bfd_arch_unknown
) /* Unknown machine arch is OK */
983 if (arch
== bfd_arch_i960
) /* i960 default is OK */
985 case bfd_mach_i960_core
:
986 case bfd_mach_i960_kb_sb
:
987 case bfd_mach_i960_mc
:
988 case bfd_mach_i960_xa
:
989 case bfd_mach_i960_ca
:
990 case bfd_mach_i960_ka_sa
:
991 case bfd_mach_i960_jx
:
992 case bfd_mach_i960_hx
:
1003 b_out_sizeof_headers (ignore_abfd
, ignore
)
1007 return sizeof(struct internal_exec
);
1012 /************************************************************************/
1014 get_value (reloc
, link_info
, input_section
)
1016 struct bfd_link_info
*link_info
;
1017 asection
*input_section
;
1020 asymbol
*symbol
= *(reloc
->sym_ptr_ptr
);
1022 /* A symbol holds a pointer to a section, and an offset from the
1023 base of the section. To relocate, we find where the section will
1024 live in the output and add that in */
1026 if (bfd_is_und_section (symbol
->section
))
1028 struct bfd_link_hash_entry
*h
;
1030 /* The symbol is undefined in this BFD. Look it up in the
1031 global linker hash table. FIXME: This should be changed when
1032 we convert b.out to use a specific final_link function and
1033 change the interface to bfd_relax_section to not require the
1035 h
= bfd_wrapped_link_hash_lookup (input_section
->owner
, link_info
,
1036 bfd_asymbol_name (symbol
),
1037 false, false, true);
1038 if (h
!= (struct bfd_link_hash_entry
*) NULL
1039 && (h
->type
== bfd_link_hash_defined
1040 || h
->type
== bfd_link_hash_defweak
))
1041 value
= h
->u
.def
.value
+ output_addr (h
->u
.def
.section
);
1042 else if (h
!= (struct bfd_link_hash_entry
*) NULL
1043 && h
->type
== bfd_link_hash_common
)
1044 value
= h
->u
.c
.size
;
1047 if (! ((*link_info
->callbacks
->undefined_symbol
)
1048 (link_info
, bfd_asymbol_name (symbol
),
1049 input_section
->owner
, input_section
, reloc
->address
)))
1056 value
= symbol
->value
+ output_addr (symbol
->section
);
1059 /* Add the value contained in the relocation */
1060 value
+= reloc
->addend
;
1066 perform_slip (abfd
, slip
, input_section
, value
)
1069 asection
*input_section
;
1074 s
= _bfd_generic_link_get_symbols (abfd
);
1075 BFD_ASSERT (s
!= (asymbol
**) NULL
);
1077 /* Find all symbols past this point, and make them know
1082 if (p
->section
== input_section
)
1084 /* This was pointing into this section, so mangle it */
1085 if (p
->value
> value
)
1088 if (p
->udata
.p
!= NULL
)
1090 struct generic_link_hash_entry
*h
;
1092 h
= (struct generic_link_hash_entry
*) p
->udata
.p
;
1093 BFD_ASSERT (h
->root
.type
== bfd_link_hash_defined
);
1094 h
->root
.u
.def
.value
-= slip
;
1095 BFD_ASSERT (h
->root
.u
.def
.value
== p
->value
);
1104 /* This routine works out if the thing we want to get to can be
1105 reached with a 24bit offset instead of a 32 bit one.
1106 If it can, then it changes the amode */
1109 abs32code (abfd
, input_section
, r
, shrink
, link_info
)
1111 asection
*input_section
;
1113 unsigned int shrink
;
1114 struct bfd_link_info
*link_info
;
1116 bfd_vma value
= get_value (r
, link_info
, input_section
);
1117 bfd_vma dot
= output_addr (input_section
) + r
->address
;
1120 /* See if the address we're looking at within 2^23 bytes of where
1121 we are, if so then we can use a small branch rather than the
1122 jump we were going to */
1124 gap
= value
- (dot
- shrink
);
1127 if (-1<<23 < (long)gap
&& (long)gap
< 1<<23 )
1129 /* Change the reloc type from 32bitcode possible 24, to 24bit
1132 r
->howto
= &howto_reloc_abs32codeshrunk
;
1133 /* The place to relc moves back by four bytes */
1136 /* This will be four bytes smaller in the long run */
1138 perform_slip (abfd
, 4, input_section
, r
->address
-shrink
+ 4);
1144 aligncode (abfd
, input_section
, r
, shrink
)
1146 asection
*input_section
;
1148 unsigned int shrink
;
1150 bfd_vma dot
= output_addr (input_section
) + r
->address
;
1155 int size
= r
->howto
->size
;
1157 /* Reduce the size of the alignment so that it's still aligned but
1158 smaller - the current size is already the same size as or bigger
1159 than the alignment required. */
1161 /* calculate the first byte following the padding before we optimize */
1162 old_end
= ((dot
+ size
) & ~size
) + size
+1;
1163 /* work out where the new end will be - remember that we're smaller
1164 than we used to be */
1165 new_end
= ((dot
- shrink
+ size
) & ~size
);
1167 /* This is the new end */
1168 gap
= old_end
- ((dot
+ size
) & ~size
);
1170 shrink_delta
= (old_end
- new_end
) - shrink
;
1174 /* Change the reloc so that it knows how far to align to */
1175 r
->howto
= howto_done_align_table
+ (r
->howto
- howto_align_table
);
1177 /* Encode the stuff into the addend - for future use we need to
1178 know how big the reloc used to be */
1179 r
->addend
= old_end
- dot
+ r
->address
;
1181 /* This will be N bytes smaller in the long run, adjust all the symbols */
1182 perform_slip (abfd
, shrink_delta
, input_section
, r
->address
- shrink
);
1183 shrink
+= shrink_delta
;
1189 b_out_bfd_relax_section (abfd
, i
, link_info
, again
)
1192 struct bfd_link_info
*link_info
;
1195 /* Get enough memory to hold the stuff */
1196 bfd
*input_bfd
= i
->owner
;
1197 asection
*input_section
= i
;
1199 arelent
**reloc_vector
= NULL
;
1200 long reloc_size
= bfd_get_reloc_upper_bound(input_bfd
,
1206 /* We only run this relaxation once. It might work to run it
1207 multiple times, but it hasn't been tested. */
1214 reloc_vector
= (arelent
**) bfd_malloc (reloc_size
);
1215 if (reloc_vector
== NULL
&& reloc_size
!= 0)
1218 /* Get the relocs and think about them */
1220 bfd_canonicalize_reloc (input_bfd
, input_section
, reloc_vector
,
1221 _bfd_generic_link_get_symbols (input_bfd
));
1222 if (reloc_count
< 0)
1224 if (reloc_count
> 0)
1227 for (parent
= reloc_vector
; *parent
; parent
++)
1229 arelent
*r
= *parent
;
1230 switch (r
->howto
->type
)
1233 /* An alignment reloc */
1234 shrink
= aligncode (abfd
, input_section
, r
, shrink
);
1237 /* A 32bit reloc in an addressing mode */
1238 shrink
= abs32code (input_bfd
, input_section
, r
, shrink
,
1241 case ABS32CODE_SHRUNK
:
1248 input_section
->_cooked_size
= input_section
->_raw_size
- shrink
;
1250 if (reloc_vector
!= NULL
)
1251 free (reloc_vector
);
1254 if (reloc_vector
!= NULL
)
1255 free (reloc_vector
);
1260 b_out_bfd_get_relocated_section_contents (output_bfd
, link_info
, link_order
,
1261 data
, relocateable
, symbols
)
1263 struct bfd_link_info
*link_info
;
1264 struct bfd_link_order
*link_order
;
1266 boolean relocateable
;
1269 /* Get enough memory to hold the stuff */
1270 bfd
*input_bfd
= link_order
->u
.indirect
.section
->owner
;
1271 asection
*input_section
= link_order
->u
.indirect
.section
;
1272 long reloc_size
= bfd_get_reloc_upper_bound (input_bfd
,
1274 arelent
**reloc_vector
= NULL
;
1280 /* If producing relocateable output, don't bother to relax. */
1282 return bfd_generic_get_relocated_section_contents (output_bfd
, link_info
,
1287 reloc_vector
= (arelent
**) bfd_malloc (reloc_size
);
1288 if (reloc_vector
== NULL
&& reloc_size
!= 0)
1291 input_section
->reloc_done
= 1;
1293 /* read in the section */
1294 BFD_ASSERT (true == bfd_get_section_contents (input_bfd
,
1298 input_section
->_raw_size
));
1300 reloc_count
= bfd_canonicalize_reloc (input_bfd
,
1304 if (reloc_count
< 0)
1306 if (reloc_count
> 0)
1308 arelent
**parent
= reloc_vector
;
1311 unsigned int dst_address
= 0;
1312 unsigned int src_address
= 0;
1316 /* Find how long a run we can do */
1317 while (dst_address
< link_order
->size
)
1322 /* Note that the relaxing didn't tie up the addresses in the
1323 relocation, so we use the original address to work out the
1324 run of non-relocated data */
1325 BFD_ASSERT (reloc
->address
>= src_address
);
1326 run
= reloc
->address
- src_address
;
1331 run
= link_order
->size
- dst_address
;
1333 /* Copy the bytes */
1334 for (idx
= 0; idx
< run
; idx
++)
1336 data
[dst_address
++] = data
[src_address
++];
1339 /* Now do the relocation */
1343 switch (reloc
->howto
->type
)
1346 calljx_callback (input_bfd
, link_info
, reloc
,
1347 src_address
+ data
, dst_address
+ data
,
1353 bfd_put_32 (input_bfd
,
1354 (bfd_get_32 (input_bfd
, data
+ src_address
)
1355 + get_value (reloc
, link_info
, input_section
)),
1356 data
+ dst_address
);
1361 callj_callback (input_bfd
, link_info
, reloc
, data
,
1362 src_address
, dst_address
, input_section
,
1368 BFD_ASSERT (reloc
->addend
>= src_address
);
1369 BFD_ASSERT (reloc
->addend
<= input_section
->_raw_size
);
1370 src_address
= reloc
->addend
;
1371 dst_address
= ((dst_address
+ reloc
->howto
->size
)
1372 & ~reloc
->howto
->size
);
1374 case ABS32CODE_SHRUNK
:
1375 /* This used to be a callx, but we've found out that a
1376 callj will reach, so do the right thing. */
1377 callj_callback (input_bfd
, link_info
, reloc
, data
,
1378 src_address
+ 4, dst_address
, input_section
,
1385 long int word
= bfd_get_32 (input_bfd
,
1386 data
+ src_address
);
1389 value
= get_value (reloc
, link_info
, input_section
);
1390 word
= ((word
& ~BAL_MASK
)
1391 | (((word
& BAL_MASK
)
1393 - output_addr (input_section
)
1397 bfd_put_32 (input_bfd
, word
, data
+ dst_address
);
1406 long int word
= bfd_get_32 (input_bfd
,
1407 data
+ src_address
);
1410 value
= get_value (reloc
, link_info
, input_section
);
1411 word
= ((word
& ~PCREL13_MASK
)
1412 | (((word
& PCREL13_MASK
)
1415 - output_addr (input_section
))
1418 bfd_put_32 (input_bfd
, word
, data
+ dst_address
);
1431 if (reloc_vector
!= NULL
)
1432 free (reloc_vector
);
1435 if (reloc_vector
!= NULL
)
1436 free (reloc_vector
);
1439 /***********************************************************************/
1441 /* Build the transfer vectors for Big and Little-Endian B.OUT files. */
1443 #define aout_32_bfd_make_debug_symbol _bfd_nosymbols_bfd_make_debug_symbol
1444 #define aout_32_close_and_cleanup aout_32_bfd_free_cached_info
1446 #define b_out_bfd_link_hash_table_create _bfd_generic_link_hash_table_create
1447 #define b_out_bfd_link_add_symbols _bfd_generic_link_add_symbols
1448 #define b_out_bfd_final_link _bfd_generic_final_link
1449 #define b_out_bfd_link_split_section _bfd_generic_link_split_section
1450 #define b_out_bfd_gc_sections bfd_generic_gc_sections
1452 #define aout_32_get_section_contents_in_window \
1453 _bfd_generic_get_section_contents_in_window
1455 const bfd_target b_out_vec_big_host
=
1457 "b.out.big", /* name */
1458 bfd_target_aout_flavour
,
1459 BFD_ENDIAN_LITTLE
, /* data byte order is little */
1460 BFD_ENDIAN_BIG
, /* hdr byte order is big */
1461 (HAS_RELOC
| EXEC_P
| /* object flags */
1462 HAS_LINENO
| HAS_DEBUG
|
1463 HAS_SYMS
| HAS_LOCALS
| WP_TEXT
| BFD_IS_RELAXABLE
),
1464 (SEC_HAS_CONTENTS
| SEC_ALLOC
| SEC_LOAD
| SEC_RELOC
| SEC_CODE
| SEC_DATA
),
1465 '_', /* symbol leading char */
1466 ' ', /* ar_pad_char */
1467 16, /* ar_max_namelen */
1469 bfd_getl64
, bfd_getl_signed_64
, bfd_putl64
,
1470 bfd_getl32
, bfd_getl_signed_32
, bfd_putl32
,
1471 bfd_getl16
, bfd_getl_signed_16
, bfd_putl16
, /* data */
1472 bfd_getb64
, bfd_getb_signed_64
, bfd_putb64
,
1473 bfd_getb32
, bfd_getb_signed_32
, bfd_putb32
,
1474 bfd_getb16
, bfd_getb_signed_16
, bfd_putb16
, /* hdrs */
1475 {_bfd_dummy_target
, b_out_object_p
, /* bfd_check_format */
1476 bfd_generic_archive_p
, _bfd_dummy_target
},
1477 {bfd_false
, b_out_mkobject
, /* bfd_set_format */
1478 _bfd_generic_mkarchive
, bfd_false
},
1479 {bfd_false
, b_out_write_object_contents
, /* bfd_write_contents */
1480 _bfd_write_archive_contents
, bfd_false
},
1482 BFD_JUMP_TABLE_GENERIC (aout_32
),
1483 BFD_JUMP_TABLE_COPY (_bfd_generic
),
1484 BFD_JUMP_TABLE_CORE (_bfd_nocore
),
1485 BFD_JUMP_TABLE_ARCHIVE (_bfd_archive_bsd
),
1486 BFD_JUMP_TABLE_SYMBOLS (aout_32
),
1487 BFD_JUMP_TABLE_RELOCS (b_out
),
1488 BFD_JUMP_TABLE_WRITE (b_out
),
1489 BFD_JUMP_TABLE_LINK (b_out
),
1490 BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic
),
1496 const bfd_target b_out_vec_little_host
=
1498 "b.out.little", /* name */
1499 bfd_target_aout_flavour
,
1500 BFD_ENDIAN_LITTLE
, /* data byte order is little */
1501 BFD_ENDIAN_LITTLE
, /* header byte order is little */
1502 (HAS_RELOC
| EXEC_P
| /* object flags */
1503 HAS_LINENO
| HAS_DEBUG
|
1504 HAS_SYMS
| HAS_LOCALS
| WP_TEXT
| BFD_IS_RELAXABLE
),
1505 (SEC_HAS_CONTENTS
| SEC_ALLOC
| SEC_LOAD
| SEC_RELOC
| SEC_CODE
| SEC_DATA
),
1506 '_', /* symbol leading char */
1507 ' ', /* ar_pad_char */
1508 16, /* ar_max_namelen */
1509 bfd_getl64
, bfd_getl_signed_64
, bfd_putl64
,
1510 bfd_getl32
, bfd_getl_signed_32
, bfd_putl32
,
1511 bfd_getl16
, bfd_getl_signed_16
, bfd_putl16
, /* data */
1512 bfd_getl64
, bfd_getl_signed_64
, bfd_putl64
,
1513 bfd_getl32
, bfd_getl_signed_32
, bfd_putl32
,
1514 bfd_getl16
, bfd_getl_signed_16
, bfd_putl16
, /* hdrs */
1516 {_bfd_dummy_target
, b_out_object_p
, /* bfd_check_format */
1517 bfd_generic_archive_p
, _bfd_dummy_target
},
1518 {bfd_false
, b_out_mkobject
, /* bfd_set_format */
1519 _bfd_generic_mkarchive
, bfd_false
},
1520 {bfd_false
, b_out_write_object_contents
, /* bfd_write_contents */
1521 _bfd_write_archive_contents
, bfd_false
},
1523 BFD_JUMP_TABLE_GENERIC (aout_32
),
1524 BFD_JUMP_TABLE_COPY (_bfd_generic
),
1525 BFD_JUMP_TABLE_CORE (_bfd_nocore
),
1526 BFD_JUMP_TABLE_ARCHIVE (_bfd_archive_bsd
),
1527 BFD_JUMP_TABLE_SYMBOLS (aout_32
),
1528 BFD_JUMP_TABLE_RELOCS (b_out
),
1529 BFD_JUMP_TABLE_WRITE (b_out
),
1530 BFD_JUMP_TABLE_LINK (b_out
),
1531 BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic
),