1 /* BFD back-end for Intel 960 b.out binaries.
2 Copyright 1990, 1991, 1992, 1993, 1994, 1995 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 /* 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 obj_textsec (abfd
) = (asection
*)NULL
;
216 obj_datasec (abfd
) = (asection
*)NULL
;
217 obj_bsssec (abfd
) = (asection
*)NULL
;
223 b_out_write_object_contents (abfd
)
226 struct external_exec swapped_hdr
;
228 if (! aout_32_make_sections (abfd
))
231 exec_hdr (abfd
)->a_info
= BMAGIC
;
233 exec_hdr (abfd
)->a_text
= obj_textsec (abfd
)->_raw_size
;
234 exec_hdr (abfd
)->a_data
= obj_datasec (abfd
)->_raw_size
;
235 exec_hdr (abfd
)->a_bss
= obj_bsssec (abfd
)->_raw_size
;
236 exec_hdr (abfd
)->a_syms
= bfd_get_symcount (abfd
) * sizeof (struct nlist
);
237 exec_hdr (abfd
)->a_entry
= bfd_get_start_address (abfd
);
238 exec_hdr (abfd
)->a_trsize
= ((obj_textsec (abfd
)->reloc_count
) *
239 sizeof (struct relocation_info
));
240 exec_hdr (abfd
)->a_drsize
= ((obj_datasec (abfd
)->reloc_count
) *
241 sizeof (struct relocation_info
));
243 exec_hdr (abfd
)->a_talign
= obj_textsec (abfd
)->alignment_power
;
244 exec_hdr (abfd
)->a_dalign
= obj_datasec (abfd
)->alignment_power
;
245 exec_hdr (abfd
)->a_balign
= obj_bsssec (abfd
)->alignment_power
;
247 exec_hdr (abfd
)->a_tload
= obj_textsec (abfd
)->vma
;
248 exec_hdr (abfd
)->a_dload
= obj_datasec (abfd
)->vma
;
250 bout_swap_exec_header_out (abfd
, exec_hdr (abfd
), &swapped_hdr
);
252 if (bfd_seek (abfd
, (file_ptr
) 0, SEEK_SET
) != 0
253 || (bfd_write ((PTR
) &swapped_hdr
, 1, EXEC_BYTES_SIZE
, abfd
)
257 /* Now write out reloc info, followed by syms and strings */
258 if (bfd_get_symcount (abfd
) != 0)
260 if (bfd_seek (abfd
, (file_ptr
)(N_SYMOFF(*exec_hdr(abfd
))), SEEK_SET
)
264 if (! aout_32_write_syms (abfd
))
267 if (bfd_seek (abfd
, (file_ptr
)(N_TROFF(*exec_hdr(abfd
))), SEEK_SET
) != 0)
270 if (!b_out_squirt_out_relocs (abfd
, obj_textsec (abfd
))) return false;
271 if (bfd_seek (abfd
, (file_ptr
)(N_DROFF(*exec_hdr(abfd
))), SEEK_SET
)
275 if (!b_out_squirt_out_relocs (abfd
, obj_datasec (abfd
))) return false;
280 /** Some reloc hackery */
282 #define CALLS 0x66003800 /* Template for 'calls' instruction */
283 #define BAL 0x0b000000 /* Template for 'bal' instruction */
284 #define BALX 0x85000000 /* Template for 'balx' instruction */
285 #define BAL_MASK 0x00ffffff
286 #define CALL 0x09000000
287 #define PCREL13_MASK 0x1fff
290 #define output_addr(sec) ((sec)->output_offset+(sec)->output_section->vma)
292 /* Magic to turn callx into calljx */
293 static bfd_reloc_status_type
294 calljx_callback (abfd
, link_info
, reloc_entry
, src
, dst
, input_section
)
296 struct bfd_link_info
*link_info
;
297 arelent
*reloc_entry
;
300 asection
*input_section
;
302 int word
= bfd_get_32 (abfd
, src
);
303 asymbol
*symbol_in
= *(reloc_entry
->sym_ptr_ptr
);
304 aout_symbol_type
*symbol
= aout_symbol (symbol_in
);
307 value
= get_value (reloc_entry
, link_info
, input_section
);
309 if (IS_CALLNAME (symbol
->other
))
311 aout_symbol_type
*balsym
= symbol
+1;
312 int inst
= bfd_get_32 (abfd
, (bfd_byte
*) src
-4);
313 /* The next symbol should be an N_BALNAME */
314 BFD_ASSERT (IS_BALNAME (balsym
->other
));
317 bfd_put_32 (abfd
, inst
, (bfd_byte
*) dst
-4);
319 value
= (symbol
->symbol
.value
320 + output_addr (symbol
->symbol
.section
));
323 word
+= value
+ reloc_entry
->addend
;
325 bfd_put_32(abfd
, word
, dst
);
330 /* Magic to turn call into callj */
331 static bfd_reloc_status_type
332 callj_callback (abfd
, link_info
, reloc_entry
, data
, srcidx
, dstidx
,
333 input_section
, shrinking
)
335 struct bfd_link_info
*link_info
;
336 arelent
*reloc_entry
;
340 asection
*input_section
;
343 int word
= bfd_get_32 (abfd
, (bfd_byte
*) data
+ srcidx
);
344 asymbol
*symbol_in
= *(reloc_entry
->sym_ptr_ptr
);
345 aout_symbol_type
*symbol
= aout_symbol (symbol_in
);
348 value
= get_value (reloc_entry
, link_info
, input_section
);
350 if (IS_OTHER(symbol
->other
))
352 /* Call to a system procedure - replace code with system
354 word
= CALLS
| (symbol
->other
- 1);
356 else if (IS_CALLNAME(symbol
->other
))
358 aout_symbol_type
*balsym
= symbol
+1;
360 /* The next symbol should be an N_BALNAME. */
361 BFD_ASSERT(IS_BALNAME(balsym
->other
));
363 /* We are calling a leaf, so replace the call instruction with a
366 + output_addr (balsym
->symbol
.section
)
367 + balsym
->symbol
.value
+ reloc_entry
->addend
369 - output_addr (input_section
))
372 else if ((symbol
->symbol
.flags
& BSF_SECTION_SYM
) != 0)
374 /* A callj against a symbol in the same section is a fully
375 resolved relative call. We don't need to do anything here.
376 If the symbol is not in the same section, I'm not sure what
377 to do; fortunately, this case will probably never arise. */
378 BFD_ASSERT (! shrinking
);
379 BFD_ASSERT (symbol
->symbol
.section
== input_section
);
383 word
= CALL
| (((word
& BAL_MASK
)
385 + reloc_entry
->addend
386 - (shrinking
? dstidx
: 0)
387 - output_addr (input_section
))
390 bfd_put_32(abfd
, word
, (bfd_byte
*) data
+ dstidx
);
394 /* type rshift size bitsize pcrel bitpos absolute overflow check*/
397 #define ABS32CODE_SHRUNK 1
402 #define ABS32_MAYBE_RELAXABLE 1
403 #define ABS32_WAS_RELAXABLE 2
407 static reloc_howto_type howto_reloc_callj
=
408 HOWTO(CALLJ
, 0, 2, 24, true, 0, complain_overflow_signed
, 0,"callj", true, 0x00ffffff, 0x00ffffff,false);
409 static reloc_howto_type howto_reloc_abs32
=
410 HOWTO(ABS32
, 0, 2, 32, false, 0, complain_overflow_bitfield
,0,"abs32", true, 0xffffffff,0xffffffff,false);
411 static reloc_howto_type howto_reloc_pcrel24
=
412 HOWTO(PCREL24
, 0, 2, 24, true, 0, complain_overflow_signed
,0,"pcrel24", true, 0x00ffffff,0x00ffffff,false);
414 static reloc_howto_type howto_reloc_pcrel13
=
415 HOWTO(PCREL13
, 0, 2, 13, true, 0, complain_overflow_signed
,0,"pcrel13", true, 0x00001fff,0x00001fff,false);
418 static reloc_howto_type howto_reloc_abs32codeshrunk
=
419 HOWTO(ABS32CODE_SHRUNK
, 0, 2, 24, true, 0, complain_overflow_signed
, 0,"callx->callj", true, 0x00ffffff, 0x00ffffff,false);
421 static reloc_howto_type howto_reloc_abs32code
=
422 HOWTO(ABS32CODE
, 0, 2, 32, false, 0, complain_overflow_bitfield
,0,"callx", true, 0xffffffff,0xffffffff,false);
424 static reloc_howto_type howto_align_table
[] = {
425 HOWTO (ALIGNER
, 0, 0x1, 0, false, 0, complain_overflow_dont
, 0, "align16", false, 0, 0, false),
426 HOWTO (ALIGNER
, 0, 0x3, 0, false, 0, complain_overflow_dont
, 0, "align32", false, 0, 0, false),
427 HOWTO (ALIGNER
, 0, 0x7, 0, false, 0, complain_overflow_dont
, 0, "align64", false, 0, 0, false),
428 HOWTO (ALIGNER
, 0, 0xf, 0, false, 0, complain_overflow_dont
, 0, "align128", false, 0, 0, false),
431 static reloc_howto_type howto_done_align_table
[] = {
432 HOWTO (ALIGNDONE
, 0x1, 0x1, 0, false, 0, complain_overflow_dont
, 0, "donealign16", false, 0, 0, false),
433 HOWTO (ALIGNDONE
, 0x3, 0x3, 0, false, 0, complain_overflow_dont
, 0, "donealign32", false, 0, 0, false),
434 HOWTO (ALIGNDONE
, 0x7, 0x7, 0, false, 0, complain_overflow_dont
, 0, "donealign64", false, 0, 0, false),
435 HOWTO (ALIGNDONE
, 0xf, 0xf, 0, false, 0, complain_overflow_dont
, 0, "donealign128", false, 0, 0, false),
438 static reloc_howto_type
*
439 b_out_bfd_reloc_type_lookup (abfd
, code
)
441 bfd_reloc_code_real_type code
;
447 case BFD_RELOC_I960_CALLJ
:
448 return &howto_reloc_callj
;
451 return &howto_reloc_abs32
;
452 case BFD_RELOC_24_PCREL
:
453 return &howto_reloc_pcrel24
;
457 /* Allocate enough room for all the reloc entries, plus pointers to them all */
460 b_out_slurp_reloc_table (abfd
, asect
, symbols
)
465 register struct relocation_info
*rptr
;
466 unsigned int counter
;
468 int extern_mask
, pcrel_mask
, callj_mask
, length_shift
;
471 bfd_vma prev_addr
= 0;
474 struct relocation_info
*relocs
;
475 arelent
*reloc_cache
;
477 if (asect
->relocation
)
479 if (!aout_32_slurp_symbol_table (abfd
))
482 if (asect
== obj_datasec (abfd
)) {
483 reloc_size
= exec_hdr(abfd
)->a_drsize
;
487 if (asect
== obj_textsec (abfd
)) {
488 reloc_size
= exec_hdr(abfd
)->a_trsize
;
492 if (asect
== obj_bsssec (abfd
)) {
497 bfd_set_error (bfd_error_invalid_operation
);
501 if (bfd_seek (abfd
, (file_ptr
)(asect
->rel_filepos
), SEEK_SET
) != 0)
503 count
= reloc_size
/ sizeof (struct relocation_info
);
505 relocs
= (struct relocation_info
*) malloc (reloc_size
);
506 if (!relocs
&& reloc_size
!= 0) {
507 bfd_set_error (bfd_error_no_memory
);
510 reloc_cache
= (arelent
*) malloc ((count
+1) * sizeof (arelent
));
513 free ((char*)relocs
);
514 bfd_set_error (bfd_error_no_memory
);
518 if (bfd_read ((PTR
) relocs
, 1, reloc_size
, abfd
) != reloc_size
) {
527 if (abfd
->xvec
->header_byteorder_big_p
) {
528 /* big-endian bit field allocation order */
536 /* little-endian bit field allocation order */
545 for (rptr
= relocs
, cache_ptr
= reloc_cache
, counter
= 0;
547 counter
++, rptr
++, cache_ptr
++)
549 unsigned char *raw
= (unsigned char *)rptr
;
551 cache_ptr
->address
= bfd_h_get_32 (abfd
, raw
+ 0);
552 cache_ptr
->howto
= 0;
553 if (abfd
->xvec
->header_byteorder_big_p
)
555 symnum
= (raw
[4] << 16) | (raw
[5] << 8) | raw
[6];
559 symnum
= (raw
[6] << 16) | (raw
[5] << 8) | raw
[4];
562 if (raw
[7] & extern_mask
)
564 /* if this is set then the r_index is a index into the symbol table;
565 * if the bit is not set then r_index contains a section map.
566 * we either fill in the sym entry with a pointer to the symbol,
567 * or point to the correct section
569 cache_ptr
->sym_ptr_ptr
= symbols
+ symnum
;
570 cache_ptr
->addend
= 0;
573 /* in a.out symbols are relative to the beginning of the
574 * file rather than sections ?
575 * (look in translate_from_native_sym_flags)
576 * the reloc entry addend has added to it the offset into the
577 * file of the data, so subtract the base to make the reloc
578 * section relative */
581 /* sign-extend symnum from 24 bits to whatever host uses */
586 cache_ptr
->sym_ptr_ptr
= (asymbol
**)NULL
;
591 cache_ptr
->sym_ptr_ptr
= obj_textsec(abfd
)->symbol_ptr_ptr
;
592 cache_ptr
->addend
= - obj_textsec(abfd
)->vma
;
596 cache_ptr
->sym_ptr_ptr
= obj_datasec(abfd
)->symbol_ptr_ptr
;
597 cache_ptr
->addend
= - obj_datasec(abfd
)->vma
;
601 cache_ptr
->sym_ptr_ptr
= obj_bsssec(abfd
)->symbol_ptr_ptr
;
602 cache_ptr
->addend
= - obj_bsssec(abfd
)->vma
;
606 cache_ptr
->sym_ptr_ptr
= obj_bsssec(abfd
)->symbol_ptr_ptr
;
607 cache_ptr
->addend
= 0;
609 case -2: /* .align */
610 if (raw
[7] & pcrel_mask
)
612 cache_ptr
->howto
= &howto_align_table
[(raw
[7] >> length_shift
) & 3];
613 cache_ptr
->sym_ptr_ptr
= bfd_abs_section_ptr
->symbol_ptr_ptr
;
620 cache_ptr
->addend
= 0;
629 /* the i960 only has a few relocation types:
630 abs 32-bit and pcrel 24bit. except for callj's! */
631 if (cache_ptr
->howto
!= 0)
633 else if (raw
[7] & callj_mask
)
635 cache_ptr
->howto
= &howto_reloc_callj
;
637 else if ( raw
[7] & pcrel_mask
)
639 if (raw
[7] & size_mask
)
640 cache_ptr
->howto
= &howto_reloc_pcrel13
;
642 cache_ptr
->howto
= &howto_reloc_pcrel24
;
646 if (raw
[7] & incode_mask
)
648 cache_ptr
->howto
= &howto_reloc_abs32code
;
652 cache_ptr
->howto
= &howto_reloc_abs32
;
655 if (cache_ptr
->address
< prev_addr
)
657 /* Ouch! this reloc is out of order, insert into the right place
660 arelent
*cursor
= cache_ptr
-1;
661 bfd_vma stop
= cache_ptr
->address
;
663 while (cursor
->address
> stop
&& cursor
>= reloc_cache
)
665 cursor
[1] = cursor
[0];
672 prev_addr
= cache_ptr
->address
;
679 asect
->relocation
= reloc_cache
;
680 asect
->reloc_count
= count
;
688 b_out_squirt_out_relocs (abfd
, section
)
697 unsigned int count
= section
->reloc_count
;
698 struct relocation_info
*native
, *natptr
;
699 size_t natsize
= count
* sizeof (struct relocation_info
);
700 int extern_mask
, pcrel_mask
, len_2
, callj_mask
;
701 if (count
== 0) return true;
702 generic
= section
->orelocation
;
703 native
= ((struct relocation_info
*) malloc (natsize
));
704 if (!native
&& natsize
!= 0) {
705 bfd_set_error (bfd_error_no_memory
);
709 if (abfd
->xvec
->header_byteorder_big_p
)
711 /* Big-endian bit field allocation order */
721 /* Little-endian bit field allocation order */
730 for (natptr
= native
; count
> 0; --count
, ++natptr
, ++generic
)
732 arelent
*g
= *generic
;
733 unsigned char *raw
= (unsigned char *)natptr
;
734 asymbol
*sym
= *(g
->sym_ptr_ptr
);
736 asection
*output_section
= sym
->section
->output_section
;
738 bfd_h_put_32(abfd
, g
->address
, raw
);
739 /* Find a type in the output format which matches the input howto -
740 * at the moment we assume input format == output format FIXME!!
743 /* FIXME: Need callj stuff here, and to check the howto entries to
744 be sure they are real for this architecture. */
745 if (g
->howto
== &howto_reloc_callj
)
747 raw
[7] = callj_mask
+ pcrel_mask
+ len_2
;
749 else if (g
->howto
== &howto_reloc_pcrel24
)
751 raw
[7] = pcrel_mask
+ len_2
;
753 else if (g
->howto
== &howto_reloc_pcrel13
)
755 raw
[7] = pcrel_mask
+ len_1
;
757 else if (g
->howto
== &howto_reloc_abs32code
)
759 raw
[7] = len_2
+ incode_mask
;
761 else if (g
->howto
>= howto_align_table
762 && g
->howto
<= (howto_align_table
763 + sizeof (howto_align_table
) / sizeof (howto_align_table
[0])
766 /* symnum == -2; extern_mask not set, pcrel_mask set */
770 | ((g
->howto
- howto_align_table
) << 1));
777 /* already mucked with r_extern, r_idx */;
778 else if (bfd_is_com_section (output_section
)
779 || bfd_is_abs_section (output_section
)
780 || bfd_is_und_section (output_section
))
783 if (bfd_abs_section_ptr
->symbol
== sym
)
785 /* Whoops, looked like an abs symbol, but is really an offset
786 from the abs section */
795 r_idx
= stoi((*(g
->sym_ptr_ptr
))->flags
);
800 /* Just an ordinary section */
802 r_idx
= output_section
->target_index
;
805 if (abfd
->xvec
->header_byteorder_big_p
) {
806 raw
[4] = (unsigned char) (r_idx
>> 16);
807 raw
[5] = (unsigned char) (r_idx
>> 8);
808 raw
[6] = (unsigned char) (r_idx
);
810 raw
[6] = (unsigned char) (r_idx
>> 16);
811 raw
[5] = (unsigned char) (r_idx
>> 8);
812 raw
[4] = (unsigned char) (r_idx
);
815 raw
[7] |= extern_mask
;
818 if (bfd_write ((PTR
) native
, 1, natsize
, abfd
) != natsize
) {
827 /* This is stupid. This function should be a boolean predicate */
829 b_out_canonicalize_reloc (abfd
, section
, relptr
, symbols
)
838 if ((section
->flags
& SEC_CONSTRUCTOR
) != 0)
840 arelent_chain
*chain
= section
->constructor_chain
;
841 for (count
= 0; count
< section
->reloc_count
; count
++)
843 *relptr
++ = &chain
->relent
;
849 if (section
->relocation
== NULL
850 && ! b_out_slurp_reloc_table (abfd
, section
, symbols
))
853 tblptr
= section
->relocation
;
854 for (count
= 0; count
++ < section
->reloc_count
;)
855 *relptr
++ = tblptr
++;
860 return section
->reloc_count
;
864 b_out_get_reloc_upper_bound (abfd
, asect
)
868 if (bfd_get_format (abfd
) != bfd_object
) {
869 bfd_set_error (bfd_error_invalid_operation
);
873 if (asect
->flags
& SEC_CONSTRUCTOR
)
874 return sizeof (arelent
*) * (asect
->reloc_count
+ 1);
876 if (asect
== obj_datasec (abfd
))
877 return (sizeof (arelent
*) *
878 ((exec_hdr(abfd
)->a_drsize
/ sizeof (struct relocation_info
))
881 if (asect
== obj_textsec (abfd
))
882 return (sizeof (arelent
*) *
883 ((exec_hdr(abfd
)->a_trsize
/ sizeof (struct relocation_info
))
886 if (asect
== obj_bsssec (abfd
))
889 bfd_set_error (bfd_error_invalid_operation
);
894 b_out_set_section_contents (abfd
, section
, location
, offset
, count
)
902 if (abfd
->output_has_begun
== false) { /* set by bfd.c handler */
903 if (! aout_32_make_sections (abfd
))
906 obj_textsec (abfd
)->filepos
= sizeof(struct internal_exec
);
907 obj_datasec(abfd
)->filepos
= obj_textsec(abfd
)->filepos
908 + obj_textsec (abfd
)->_raw_size
;
911 /* regardless, once we know what we're doing, we might as well get going */
912 if (bfd_seek (abfd
, section
->filepos
+ offset
, SEEK_SET
) != 0)
916 return (bfd_write ((PTR
)location
, 1, count
, abfd
) == count
) ?true:false;
922 b_out_set_arch_mach (abfd
, arch
, machine
)
924 enum bfd_architecture arch
;
925 unsigned long machine
;
927 bfd_default_set_arch_mach(abfd
, arch
, machine
);
929 if (arch
== bfd_arch_unknown
) /* Unknown machine arch is OK */
931 if (arch
== bfd_arch_i960
) /* i960 default is OK */
933 case bfd_mach_i960_core
:
934 case bfd_mach_i960_kb_sb
:
935 case bfd_mach_i960_mc
:
936 case bfd_mach_i960_xa
:
937 case bfd_mach_i960_ca
:
938 case bfd_mach_i960_ka_sa
:
949 b_out_sizeof_headers (ignore_abfd
, ignore
)
953 return sizeof(struct internal_exec
);
958 /************************************************************************/
960 get_value (reloc
, link_info
, input_section
)
962 struct bfd_link_info
*link_info
;
963 asection
*input_section
;
966 asymbol
*symbol
= *(reloc
->sym_ptr_ptr
);
968 /* A symbol holds a pointer to a section, and an offset from the
969 base of the section. To relocate, we find where the section will
970 live in the output and add that in */
972 if (bfd_is_und_section (symbol
->section
))
974 struct bfd_link_hash_entry
*h
;
976 /* The symbol is undefined in this BFD. Look it up in the
977 global linker hash table. FIXME: This should be changed when
978 we convert b.out to use a specific final_link function and
979 change the interface to bfd_relax_section to not require the
981 h
= bfd_link_hash_lookup (link_info
->hash
, bfd_asymbol_name (symbol
),
983 if (h
!= (struct bfd_link_hash_entry
*) NULL
984 && (h
->type
== bfd_link_hash_defined
985 || h
->type
== bfd_link_hash_defweak
))
986 value
= h
->u
.def
.value
+ output_addr (h
->u
.def
.section
);
987 else if (h
!= (struct bfd_link_hash_entry
*) NULL
988 && h
->type
== bfd_link_hash_common
)
992 if (! ((*link_info
->callbacks
->undefined_symbol
)
993 (link_info
, bfd_asymbol_name (symbol
),
994 input_section
->owner
, input_section
, reloc
->address
)))
1001 value
= symbol
->value
+ output_addr (symbol
->section
);
1004 /* Add the value contained in the relocation */
1005 value
+= reloc
->addend
;
1011 perform_slip (abfd
, slip
, input_section
, value
)
1014 asection
*input_section
;
1019 s
= _bfd_generic_link_get_symbols (abfd
);
1020 BFD_ASSERT (s
!= (asymbol
**) NULL
);
1022 /* Find all symbols past this point, and make them know
1027 if (p
->section
== input_section
)
1029 /* This was pointing into this section, so mangle it */
1030 if (p
->value
> value
)
1033 if (p
->udata
.p
!= NULL
)
1035 struct generic_link_hash_entry
*h
;
1037 h
= (struct generic_link_hash_entry
*) p
->udata
.p
;
1038 BFD_ASSERT (h
->root
.type
== bfd_link_hash_defined
);
1039 h
->root
.u
.def
.value
-= slip
;
1040 BFD_ASSERT (h
->root
.u
.def
.value
== p
->value
);
1049 /* This routine works out if the thing we want to get to can be
1050 reached with a 24bit offset instead of a 32 bit one.
1051 If it can, then it changes the amode */
1054 abs32code (abfd
, input_section
, r
, shrink
, link_info
)
1056 asection
*input_section
;
1058 unsigned int shrink
;
1059 struct bfd_link_info
*link_info
;
1061 bfd_vma value
= get_value (r
, link_info
, input_section
);
1062 bfd_vma dot
= output_addr (input_section
) + r
->address
;
1065 /* See if the address we're looking at within 2^23 bytes of where
1066 we are, if so then we can use a small branch rather than the
1067 jump we were going to */
1069 gap
= value
- (dot
- shrink
);
1072 if (-1<<23 < (long)gap
&& (long)gap
< 1<<23 )
1074 /* Change the reloc type from 32bitcode possible 24, to 24bit
1077 r
->howto
= &howto_reloc_abs32codeshrunk
;
1078 /* The place to relc moves back by four bytes */
1081 /* This will be four bytes smaller in the long run */
1083 perform_slip (abfd
, 4, input_section
, r
->address
-shrink
+ 4);
1089 aligncode (abfd
, input_section
, r
, shrink
)
1091 asection
*input_section
;
1093 unsigned int shrink
;
1095 bfd_vma dot
= output_addr (input_section
) + r
->address
;
1100 int size
= r
->howto
->size
;
1102 /* Reduce the size of the alignment so that it's still aligned but
1103 smaller - the current size is already the same size as or bigger
1104 than the alignment required. */
1106 /* calculate the first byte following the padding before we optimize */
1107 old_end
= ((dot
+ size
) & ~size
) + size
+1;
1108 /* work out where the new end will be - remember that we're smaller
1109 than we used to be */
1110 new_end
= ((dot
- shrink
+ size
) & ~size
);
1112 /* This is the new end */
1113 gap
= old_end
- ((dot
+ size
) & ~size
);
1115 shrink_delta
= (old_end
- new_end
) - shrink
;
1119 /* Change the reloc so that it knows how far to align to */
1120 r
->howto
= howto_done_align_table
+ (r
->howto
- howto_align_table
);
1122 /* Encode the stuff into the addend - for future use we need to
1123 know how big the reloc used to be */
1124 r
->addend
= old_end
- dot
+ r
->address
;
1126 /* This will be N bytes smaller in the long run, adjust all the symbols */
1127 perform_slip (abfd
, shrink_delta
, input_section
, r
->address
- shrink
);
1128 shrink
+= shrink_delta
;
1134 b_out_bfd_relax_section (abfd
, i
, link_info
, again
)
1137 struct bfd_link_info
*link_info
;
1140 /* Get enough memory to hold the stuff */
1141 bfd
*input_bfd
= i
->owner
;
1142 asection
*input_section
= i
;
1144 arelent
**reloc_vector
= NULL
;
1145 long reloc_size
= bfd_get_reloc_upper_bound(input_bfd
,
1151 /* We only run this relaxation once. It might work to run it
1152 multiple times, but it hasn't been tested. */
1159 reloc_vector
= (arelent
**) malloc (reloc_size
);
1160 if (reloc_vector
== NULL
&& reloc_size
!= 0)
1162 bfd_set_error (bfd_error_no_memory
);
1166 /* Get the relocs and think about them */
1168 bfd_canonicalize_reloc (input_bfd
, input_section
, reloc_vector
,
1169 _bfd_generic_link_get_symbols (input_bfd
));
1170 if (reloc_count
< 0)
1172 if (reloc_count
> 0)
1175 for (parent
= reloc_vector
; *parent
; parent
++)
1177 arelent
*r
= *parent
;
1178 switch (r
->howto
->type
)
1181 /* An alignment reloc */
1182 shrink
= aligncode (abfd
, input_section
, r
, shrink
);
1185 /* A 32bit reloc in an addressing mode */
1186 shrink
= abs32code (input_bfd
, input_section
, r
, shrink
,
1189 case ABS32CODE_SHRUNK
:
1196 input_section
->_cooked_size
= input_section
->_raw_size
- shrink
;
1198 if (reloc_vector
!= NULL
)
1199 free (reloc_vector
);
1202 if (reloc_vector
!= NULL
)
1203 free (reloc_vector
);
1208 b_out_bfd_get_relocated_section_contents (in_abfd
, link_info
, link_order
,
1209 data
, relocateable
, symbols
)
1211 struct bfd_link_info
*link_info
;
1212 struct bfd_link_order
*link_order
;
1214 boolean relocateable
;
1217 /* Get enough memory to hold the stuff */
1218 bfd
*input_bfd
= link_order
->u
.indirect
.section
->owner
;
1219 asection
*input_section
= link_order
->u
.indirect
.section
;
1220 long reloc_size
= bfd_get_reloc_upper_bound(input_bfd
,
1222 arelent
**reloc_vector
= NULL
;
1228 /* If producing relocateable output, don't bother to relax. */
1230 return bfd_generic_get_relocated_section_contents (in_abfd
, link_info
,
1235 reloc_vector
= (arelent
**) malloc (reloc_size
);
1236 if (reloc_vector
== NULL
&& reloc_size
!= 0)
1238 bfd_set_error (bfd_error_no_memory
);
1242 input_section
->reloc_done
= 1;
1244 /* read in the section */
1245 BFD_ASSERT (true == bfd_get_section_contents(input_bfd
,
1249 input_section
->_raw_size
));
1251 reloc_count
= bfd_canonicalize_reloc (input_bfd
,
1255 if (reloc_count
< 0)
1257 if (reloc_count
> 0)
1259 arelent
**parent
= reloc_vector
;
1262 unsigned int dst_address
= 0;
1263 unsigned int src_address
= 0;
1267 /* Find how long a run we can do */
1268 while (dst_address
< link_order
->size
)
1273 /* Note that the relaxing didn't tie up the addresses in the
1274 relocation, so we use the original address to work out the
1275 run of non-relocated data */
1276 BFD_ASSERT (reloc
->address
>= src_address
);
1277 run
= reloc
->address
- src_address
;
1282 run
= link_order
->size
- dst_address
;
1284 /* Copy the bytes */
1285 for (idx
= 0; idx
< run
; idx
++)
1287 data
[dst_address
++] = data
[src_address
++];
1290 /* Now do the relocation */
1294 switch (reloc
->howto
->type
)
1297 calljx_callback (in_abfd
, link_info
, reloc
,
1298 src_address
+ data
, dst_address
+ data
,
1305 (bfd_get_32 (in_abfd
, data
+src_address
)
1306 + get_value (reloc
, link_info
, input_section
)),
1312 callj_callback (in_abfd
, link_info
, reloc
, data
, src_address
,
1313 dst_address
, input_section
, false);
1318 BFD_ASSERT (reloc
->addend
>= src_address
);
1319 BFD_ASSERT (reloc
->addend
<= input_section
->_raw_size
);
1320 src_address
= reloc
->addend
;
1321 dst_address
= ((dst_address
+ reloc
->howto
->size
)
1322 & ~reloc
->howto
->size
);
1324 case ABS32CODE_SHRUNK
:
1325 /* This used to be a callx, but we've found out that a
1326 callj will reach, so do the right thing. */
1327 callj_callback (in_abfd
, link_info
, reloc
, data
,
1328 src_address
+ 4, dst_address
, input_section
,
1335 long int word
= bfd_get_32(in_abfd
, data
+src_address
);
1338 value
= get_value (reloc
, link_info
, input_section
);
1339 word
= ((word
& ~BAL_MASK
)
1340 | (((word
& BAL_MASK
)
1342 - output_addr (input_section
)
1346 bfd_put_32(in_abfd
,word
, data
+dst_address
);
1355 long int word
= bfd_get_32(in_abfd
, data
+src_address
);
1358 value
= get_value (reloc
, link_info
, input_section
);
1359 word
= ((word
& ~PCREL13_MASK
)
1360 | (((word
& PCREL13_MASK
)
1363 - output_addr (input_section
))
1366 bfd_put_32(in_abfd
,word
, data
+dst_address
);
1379 if (reloc_vector
!= NULL
)
1380 free (reloc_vector
);
1383 if (reloc_vector
!= NULL
)
1384 free (reloc_vector
);
1387 /***********************************************************************/
1389 /* Build the transfer vectors for Big and Little-Endian B.OUT files. */
1391 #define aout_32_bfd_make_debug_symbol _bfd_nosymbols_bfd_make_debug_symbol
1392 #define aout_32_close_and_cleanup aout_32_bfd_free_cached_info
1394 #define b_out_bfd_link_hash_table_create _bfd_generic_link_hash_table_create
1395 #define b_out_bfd_link_add_symbols _bfd_generic_link_add_symbols
1396 #define b_out_bfd_final_link _bfd_generic_final_link
1397 #define b_out_bfd_link_split_section _bfd_generic_link_split_section
1400 const bfd_target b_out_vec_big_host
=
1402 "b.out.big", /* name */
1403 bfd_target_aout_flavour
,
1404 false, /* data byte order is little */
1405 true, /* hdr byte order is big */
1406 (HAS_RELOC
| EXEC_P
| /* object flags */
1407 HAS_LINENO
| HAS_DEBUG
|
1408 HAS_SYMS
| HAS_LOCALS
| WP_TEXT
| BFD_IS_RELAXABLE
),
1409 (SEC_HAS_CONTENTS
| SEC_ALLOC
| SEC_LOAD
| SEC_RELOC
), /* section flags */
1410 '_', /* symbol leading char */
1411 ' ', /* ar_pad_char */
1412 16, /* ar_max_namelen */
1413 2, /* minumum alignment power */
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
, /* data */
1418 bfd_getb64
, bfd_getb_signed_64
, bfd_putb64
,
1419 bfd_getb32
, bfd_getb_signed_32
, bfd_putb32
,
1420 bfd_getb16
, bfd_getb_signed_16
, bfd_putb16
, /* hdrs */
1421 {_bfd_dummy_target
, b_out_object_p
, /* bfd_check_format */
1422 bfd_generic_archive_p
, _bfd_dummy_target
},
1423 {bfd_false
, b_out_mkobject
, /* bfd_set_format */
1424 _bfd_generic_mkarchive
, bfd_false
},
1425 {bfd_false
, b_out_write_object_contents
, /* bfd_write_contents */
1426 _bfd_write_archive_contents
, bfd_false
},
1428 BFD_JUMP_TABLE_GENERIC (aout_32
),
1429 BFD_JUMP_TABLE_COPY (_bfd_generic
),
1430 BFD_JUMP_TABLE_CORE (_bfd_nocore
),
1431 BFD_JUMP_TABLE_ARCHIVE (_bfd_archive_bsd
),
1432 BFD_JUMP_TABLE_SYMBOLS (aout_32
),
1433 BFD_JUMP_TABLE_RELOCS (b_out
),
1434 BFD_JUMP_TABLE_WRITE (b_out
),
1435 BFD_JUMP_TABLE_LINK (b_out
),
1436 BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic
),
1442 const bfd_target b_out_vec_little_host
=
1444 "b.out.little", /* name */
1445 bfd_target_aout_flavour
,
1446 false, /* data byte order is little */
1447 false, /* header byte order is little */
1448 (HAS_RELOC
| EXEC_P
| /* object flags */
1449 HAS_LINENO
| HAS_DEBUG
|
1450 HAS_SYMS
| HAS_LOCALS
| WP_TEXT
| BFD_IS_RELAXABLE
),
1451 (SEC_HAS_CONTENTS
| SEC_ALLOC
| SEC_LOAD
| SEC_RELOC
), /* section flags */
1452 '_', /* symbol leading char */
1453 ' ', /* ar_pad_char */
1454 16, /* ar_max_namelen */
1455 2, /* minum align */
1456 bfd_getl64
, bfd_getl_signed_64
, bfd_putl64
,
1457 bfd_getl32
, bfd_getl_signed_32
, bfd_putl32
,
1458 bfd_getl16
, bfd_getl_signed_16
, bfd_putl16
, /* data */
1459 bfd_getl64
, bfd_getl_signed_64
, bfd_putl64
,
1460 bfd_getl32
, bfd_getl_signed_32
, bfd_putl32
,
1461 bfd_getl16
, bfd_getl_signed_16
, bfd_putl16
, /* hdrs */
1463 {_bfd_dummy_target
, b_out_object_p
, /* bfd_check_format */
1464 bfd_generic_archive_p
, _bfd_dummy_target
},
1465 {bfd_false
, b_out_mkobject
, /* bfd_set_format */
1466 _bfd_generic_mkarchive
, bfd_false
},
1467 {bfd_false
, b_out_write_object_contents
, /* bfd_write_contents */
1468 _bfd_write_archive_contents
, bfd_false
},
1470 BFD_JUMP_TABLE_GENERIC (aout_32
),
1471 BFD_JUMP_TABLE_COPY (_bfd_generic
),
1472 BFD_JUMP_TABLE_CORE (_bfd_nocore
),
1473 BFD_JUMP_TABLE_ARCHIVE (_bfd_archive_bsd
),
1474 BFD_JUMP_TABLE_SYMBOLS (aout_32
),
1475 BFD_JUMP_TABLE_RELOCS (b_out
),
1476 BFD_JUMP_TABLE_WRITE (b_out
),
1477 BFD_JUMP_TABLE_LINK (b_out
),
1478 BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic
),