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
|
/* BFD back-end for os9000 i386 binaries.
Copyright (C) 1990-2014 Free Software Foundation, Inc.
Written by Cygnus Support.
This file is part of BFD, the Binary File Descriptor library.
This program 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 3 of the License, or
(at your option) any later version.
This program 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 this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
MA 02110-1301, USA. */
#include "sysdep.h"
#include "bfd.h"
#include "libbfd.h"
#include "bfdlink.h"
#include "libaout.h" /* BFD a.out internal data structures */
#include "os9k.h"
/* Swaps the information in an executable header taken from a raw byte
stream memory image, into the internal exec_header structure. */
static bfd_boolean
os9k_swap_exec_header_in (bfd *abfd,
mh_com *raw_bytes,
struct internal_exec *execp)
{
mh_com *bytes = (mh_com *) raw_bytes;
unsigned int dload, dmemsize, dmemstart;
/* Now fill in fields in the execp, from the bytes in the raw data. */
execp->a_info = H_GET_16 (abfd, bytes->m_sync);
execp->a_syms = 0;
execp->a_entry = H_GET_32 (abfd, bytes->m_exec);
execp->a_talign = 2;
execp->a_dalign = 2;
execp->a_balign = 2;
dload = H_GET_32 (abfd, bytes->m_idata);
execp->a_data = dload + 8;
if (bfd_seek (abfd, (file_ptr) dload, SEEK_SET) != 0
|| (bfd_bread (&dmemstart, (bfd_size_type) sizeof (dmemstart), abfd)
!= sizeof (dmemstart))
|| (bfd_bread (&dmemsize, (bfd_size_type) sizeof (dmemsize), abfd)
!= sizeof (dmemsize)))
return FALSE;
execp->a_tload = 0;
execp->a_dload = H_GET_32 (abfd, (unsigned char *) &dmemstart);
execp->a_text = dload - execp->a_tload;
execp->a_data = H_GET_32 (abfd, (unsigned char *) &dmemsize);
execp->a_bss = H_GET_32 (abfd, bytes->m_data) - execp->a_data;
execp->a_trsize = 0;
execp->a_drsize = 0;
return TRUE;
}
/* Finish up the opening of a b.out file for reading. Fill in all the
fields that are not handled by common code. */
static const bfd_target *
os9k_callback (bfd *abfd)
{
struct internal_exec *execp = exec_hdr (abfd);
unsigned long bss_start;
/* Architecture and machine type. */
bfd_set_arch_mach (abfd, bfd_arch_i386, 0);
/* The positions of the string table and symbol table. */
obj_str_filepos (abfd) = 0;
obj_sym_filepos (abfd) = 0;
/* The alignments of the sections. */
obj_textsec (abfd)->alignment_power = execp->a_talign;
obj_datasec (abfd)->alignment_power = execp->a_dalign;
obj_bsssec (abfd)->alignment_power = execp->a_balign;
/* The starting addresses of the sections. */
obj_textsec (abfd)->vma = execp->a_tload;
obj_datasec (abfd)->vma = execp->a_dload;
/* And reload the sizes, since the aout module zaps them. */
obj_textsec (abfd)->size = execp->a_text;
bss_start = execp->a_dload + execp->a_data; /* BSS = end of data section. */
obj_bsssec (abfd)->vma = align_power (bss_start, execp->a_balign);
/* The file positions of the sections. */
obj_textsec (abfd)->filepos = execp->a_entry;
obj_datasec (abfd)->filepos = execp->a_dload;
/* The file positions of the relocation info ***
obj_textsec (abfd)->rel_filepos = N_TROFF(*execp);
obj_datasec (abfd)->rel_filepos = N_DROFF(*execp); */
adata (abfd).page_size = 1; /* Not applicable. */
adata (abfd).segment_size = 1;/* Not applicable. */
adata (abfd).exec_bytes_size = MHCOM_BYTES_SIZE;
return abfd->xvec;
}
static const bfd_target *
os9k_object_p (bfd *abfd)
{
struct internal_exec anexec;
mh_com exec_bytes;
if (bfd_bread (&exec_bytes, (bfd_size_type) MHCOM_BYTES_SIZE, abfd)
!= MHCOM_BYTES_SIZE)
{
if (bfd_get_error () != bfd_error_system_call)
bfd_set_error (bfd_error_wrong_format);
return 0;
}
anexec.a_info = H_GET_16 (abfd, exec_bytes.m_sync);
if (N_BADMAG (anexec))
{
bfd_set_error (bfd_error_wrong_format);
return 0;
}
if (! os9k_swap_exec_header_in (abfd, &exec_bytes, &anexec))
{
if (bfd_get_error () != bfd_error_system_call)
bfd_set_error (bfd_error_wrong_format);
return NULL;
}
return aout_32_some_aout_object_p (abfd, &anexec, os9k_callback);
}
static int
os9k_sizeof_headers (bfd *abfd ATTRIBUTE_UNUSED,
struct bfd_link_info *info ATTRIBUTE_UNUSED)
{
return sizeof (struct internal_exec);
}
#define aout_32_close_and_cleanup aout_32_bfd_free_cached_info
#define aout_32_bfd_make_debug_symbol _bfd_nosymbols_bfd_make_debug_symbol
#define aout_32_bfd_reloc_type_lookup _bfd_norelocs_bfd_reloc_type_lookup
#define aout_32_bfd_reloc_name_lookup _bfd_norelocs_bfd_reloc_name_lookup
#define aout_32_get_section_contents_in_window \
_bfd_generic_get_section_contents_in_window
#define os9k_bfd_get_relocated_section_contents \
bfd_generic_get_relocated_section_contents
#define os9k_bfd_relax_section bfd_generic_relax_section
#define os9k_bfd_gc_sections bfd_generic_gc_sections
#define os9k_bfd_lookup_section_flags bfd_generic_lookup_section_flags
#define os9k_bfd_merge_sections bfd_generic_merge_sections
#define os9k_bfd_is_group_section bfd_generic_is_group_section
#define os9k_bfd_discard_group bfd_generic_discard_group
#define os9k_section_already_linked \
_bfd_generic_section_already_linked
#define os9k_bfd_define_common_symbol bfd_generic_define_common_symbol
#define os9k_bfd_link_hash_table_create _bfd_generic_link_hash_table_create
#define os9k_bfd_link_hash_table_free _bfd_generic_link_hash_table_free
#define os9k_bfd_link_add_symbols _bfd_generic_link_add_symbols
#define os9k_bfd_link_just_syms _bfd_generic_link_just_syms
#define os9k_bfd_copy_link_hash_symbol_type \
_bfd_generic_copy_link_hash_symbol_type
#define os9k_bfd_final_link _bfd_generic_final_link
#define os9k_bfd_link_split_section _bfd_generic_link_split_section
const bfd_target i386_aout_os9k_vec =
{
"i386os9k", /* name */
bfd_target_os9k_flavour,
BFD_ENDIAN_LITTLE, /* data byte order is little */
BFD_ENDIAN_LITTLE, /* hdr byte order is little */
(HAS_RELOC | EXEC_P | WP_TEXT), /* object flags */
(SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD), /* section flags */
0, /* symbol leading char */
' ', /* ar_pad_char */
16, /* ar_max_namelen */
0, /* match priority. */
bfd_getl64, bfd_getl_signed_64, bfd_putl64,
bfd_getl32, bfd_getl_signed_32, bfd_putl32,
bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* data */
bfd_getl64, bfd_getl_signed_64, bfd_putl64,
bfd_getl32, bfd_getl_signed_32, bfd_putl32,
bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* hdrs */
{_bfd_dummy_target, os9k_object_p, /* bfd_check_format */
bfd_generic_archive_p, _bfd_dummy_target},
{bfd_false, bfd_false, /* bfd_set_format */
_bfd_generic_mkarchive, bfd_false},
{bfd_false, bfd_false, /* bfd_write_contents */
_bfd_write_archive_contents, bfd_false},
BFD_JUMP_TABLE_GENERIC (aout_32),
BFD_JUMP_TABLE_COPY (_bfd_generic),
BFD_JUMP_TABLE_CORE (_bfd_nocore),
BFD_JUMP_TABLE_ARCHIVE (_bfd_archive_bsd),
BFD_JUMP_TABLE_SYMBOLS (aout_32),
BFD_JUMP_TABLE_RELOCS (aout_32),
BFD_JUMP_TABLE_WRITE (aout_32),
BFD_JUMP_TABLE_LINK (os9k),
BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),
NULL,
NULL,
};
|
