1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
|
/* BFD backend for local host's a.out binaries */
/* Copyright (C) 1990, 1991 Free Software Foundation, Inc.
This file is part of BFD, the Binary File Diddler.
BFD is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 1, or (at your option)
any later version.
BFD is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with BFD; see the file COPYING. If not, write to
the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
#include <ansidecl.h>
#include <sysdep.h>
#include "bfd.h"
#include "libbfd.h"
#include <a.out.h>
#include "liba.out.h" /* BFD a.out internal data structures */
#include "trad-core.h" /* Traditional Unix core files */
void (*bfd_error_trap)();
static bfd_target *host_aout_callback ();
/*SUPPRESS558*/
/*SUPPRESS529*/
bfd_target *
host_aout_object_p (abfd)
bfd *abfd;
{
unsigned char magicbuf[4]; /* Raw bytes of magic number from file */
unsigned long magic; /* Swapped magic number */
bfd_error = system_call_error;
if (bfd_read ((PTR)magicbuf, 1, sizeof (magicbuf), abfd) !=
sizeof (magicbuf))
return 0;
magic = bfd_h_getlong (abfd, magicbuf);
if (N_BADMAG (*((struct exec *) &magic))) return 0;
return some_aout_object_p (abfd, host_aout_callback);
}
/* Set parameters about this a.out file that are machine-dependent.
This routine is called from some_aout_object_p just before it returns. */
static bfd_target *
host_aout_callback (abfd)
bfd *abfd;
{
struct exec *execp = exec_hdr (abfd);
/* The virtual memory addresses of the sections */
obj_datasec (abfd)->vma = N_DATADDR(*execp);
obj_bsssec (abfd)->vma = N_BSSADDR(*execp);
obj_textsec (abfd)->vma = N_TXTADDR(*execp);
/* The file offsets of the sections */
obj_textsec (abfd)->filepos = N_TXTOFF(*execp);
obj_datasec (abfd)->filepos = N_DATOFF(*execp);
/* The file offsets of the relocation info */
obj_textsec (abfd)->rel_filepos = N_TRELOFF(*execp);
obj_datasec (abfd)->rel_filepos = N_DRELOFF(*execp);
/* The file offsets of the string table and symbol table. */
obj_str_filepos (abfd) = N_STROFF (*execp);
obj_sym_filepos (abfd) = N_SYMOFF (*execp);
#ifdef HOST_MACHINE_ARCH
abfd->obj_arch = HOST_MACHINE_ARCH;
#endif
#ifdef HOST_MACHINE_MACHINE
abfd->obj_machine = HOST_MACHINE_MACHINE;
#endif
return abfd->xvec;
}
boolean
host_aout_mkobject (abfd)
bfd *abfd;
{
char *rawptr;
bfd_error = system_call_error;
/* Use an intermediate variable for clarity */
rawptr = bfd_zalloc (abfd, sizeof (struct aoutdata) + sizeof (struct exec));
if (rawptr == NULL) {
bfd_error = no_memory;
return false;
}
set_tdata (abfd, (struct aoutdata *) rawptr);
exec_hdr (abfd) = (struct exec *) (rawptr + sizeof (struct aoutdata));
/* For simplicity's sake we just make all the sections right here. */
obj_textsec (abfd) = (asection *)NULL;
obj_datasec (abfd) = (asection *)NULL;
obj_bsssec (abfd) = (asection *)NULL;
bfd_make_section (abfd, ".text");
bfd_make_section (abfd, ".data");
bfd_make_section (abfd, ".bss");
return true;
}
/* Write an object file in host a.out format.
Section contents have already been written. We write the
file header, symbols, and relocation. */
boolean
host_aout_write_object_contents (abfd)
bfd *abfd;
{
/* This works because we are on the host system */
#define EXEC_BYTES_SIZE sizeof (struct exec)
size_t data_pad = 0;
unsigned char exec_bytes[EXEC_BYTES_SIZE];
struct exec *execp = exec_hdr (abfd);
execp->a_text = obj_textsec (abfd)->size;
N_SET_MAGIC (*execp, OMAGIC);
if (abfd->flags & D_PAGED) {
/* This is not strictly true, but will probably do for the default
case. FIXME.
*/
execp->a_text = obj_textsec (abfd)->size + EXEC_BYTES_SIZE;
N_SET_MAGIC (*execp, ZMAGIC);
} else if (abfd->flags & WP_TEXT) {
N_SET_MAGIC (*execp, NMAGIC);
}
N_SET_FLAGS (*execp, 0x1); /* copied from ld.c; who the hell knows? */
if (abfd->flags & D_PAGED)
{
data_pad = ((obj_datasec(abfd)->size + PAGE_SIZE -1)
& (- PAGE_SIZE)) - obj_datasec(abfd)->size;
if (data_pad > obj_bsssec(abfd)->size)
execp->a_bss = 0;
else
execp->a_bss = obj_bsssec(abfd)->size - data_pad;
execp->a_data = obj_datasec(abfd)->size + data_pad;
}
else {
execp->a_data = obj_datasec (abfd)->size;
execp->a_bss = obj_bsssec (abfd)->size;
}
execp->a_syms = bfd_get_symcount (abfd) * sizeof (struct nlist);
execp->a_entry = bfd_get_start_address (abfd);
execp->a_trsize = ((obj_textsec (abfd)->reloc_count) *
obj_reloc_entry_size (abfd));
execp->a_drsize = ((obj_datasec (abfd)->reloc_count) *
obj_reloc_entry_size (abfd));
bfd_aout_swap_exec_header_out (abfd, execp, exec_bytes);
bfd_seek (abfd, 0L, false);
bfd_write ((PTR) exec_bytes, 1, EXEC_BYTES_SIZE, abfd);
/* Now write out reloc info, followed by syms and strings */
if (bfd_get_symcount (abfd) != 0)
{
bfd_seek (abfd,
(long)(N_SYMOFF(*execp)), false);
aout_write_syms (abfd);
bfd_seek (abfd, (long)(N_TRELOFF(*execp)), false);
if (!aout_squirt_out_relocs (abfd, obj_textsec (abfd))) return false;
bfd_seek (abfd, (long)(N_DRELOFF(*execp)), false);
if (!aout_squirt_out_relocs (abfd, obj_datasec (abfd))) return false;
}
return true;
}
/* We use BFD generic archive files. */
#define aout_openr_next_archived_file bfd_generic_openr_next_archived_file
#define aout_generic_stat_arch_elt bfd_generic_stat_arch_elt
#define aout_slurp_armap bfd_slurp_bsd_armap
#define aout_slurp_extended_name_table bfd_true
#define aout_write_armap bsd_write_armap
#define aout_truncate_arname bfd_bsd_truncate_arname
/* We use traditional Unix core file format. */
#define aout_core_file_failing_command trad_unix_core_file_failing_command
#define aout_core_file_failing_signal trad_unix_core_file_failing_signal
#define aout_core_file_matches_executable_p \
trad_unix_core_file_matches_executable_p
/* We replace this function */
#define aout_write_object_contents host_aout_write_object_contents
bfd_target host_aout_big_vec =
{
"a.out-host-big", /* name */
bfd_target_aout_flavour_enum,
true, /* target byte order */
true, /* target headers byte order */
(HAS_RELOC | EXEC_P | /* object flags */
HAS_LINENO | HAS_DEBUG |
HAS_SYMS | HAS_LOCALS | DYNAMIC | WP_TEXT | D_PAGED),
(SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* section flags */
' ', /* ar_pad_char */
16, /* ar_max_namelen */
_do_getblong, _do_putblong, _do_getbshort, _do_putbshort, /* data */
_do_getblong, _do_putblong, _do_getbshort, _do_putbshort, /* hdrs */
{_bfd_dummy_target, host_aout_object_p,
bfd_generic_archive_p, trad_unix_core_file_p},
{bfd_false, host_aout_mkobject,
_bfd_generic_mkarchive, bfd_false},
{bfd_false, aout_write_object_contents, /* bfd_write_contents */
_bfd_write_archive_contents, bfd_false},
JUMP_TABLE(aout)
};
bfd_target host_aout_little_vec =
{
"a.out-host-little", /* name */
bfd_target_aout_flavour_enum,
false, /* target byte order */
false, /* target headers byte order */
(HAS_RELOC | EXEC_P | /* object flags */
HAS_LINENO | HAS_DEBUG |
HAS_SYMS | HAS_LOCALS | DYNAMIC | WP_TEXT | D_PAGED),
(SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* section flags */
' ', /* ar_pad_char */
16, /* ar_max_namelen */
_do_getllong, _do_putllong, _do_getlshort, _do_putlshort, /* data */
_do_getllong, _do_putllong, _do_getlshort, _do_putlshort, /* hdrs */
{_bfd_dummy_target, host_aout_object_p,
bfd_generic_archive_p, trad_unix_core_file_p},
{bfd_false, host_aout_mkobject,
_bfd_generic_mkarchive, bfd_false},
{bfd_false, aout_write_object_contents, /* bfd_write_contents */
_bfd_write_archive_contents, bfd_false},
JUMP_TABLE(aout)
};
|
