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
|
/* BFD backend for core files which use the ptrace_user structure
Copyright 1993, 1994 Free Software Foundation, Inc.
The structure of this file is based on trad-core.c written by John Gilmore
of Cygnus Support.
Modified to work with the ptrace_user structure by Kevin A. Buettner.
(Longterm it may be better to merge this file with trad-core.c)
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 2 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
#ifdef PTRACE_CORE
#include "bfd.h"
#include "sysdep.h"
#include "libbfd.h"
#include <stdio.h>
#include <sys/types.h>
#include <sys/param.h>
#include <sys/dir.h>
#include <signal.h>
#include <errno.h>
#include <unistd.h>
#include <sys/ptrace.h>
struct trad_core_struct
{
asection *data_section;
asection *stack_section;
asection *reg_section;
struct ptrace_user u;
};
#define core_upage(bfd) (&((bfd)->tdata.trad_core_data->u))
#define core_datasec(bfd) ((bfd)->tdata.trad_core_data->data_section)
#define core_stacksec(bfd) ((bfd)->tdata.trad_core_data->stack_section)
#define core_regsec(bfd) ((bfd)->tdata.trad_core_data->reg_section)
/* forward declarations */
const bfd_target *ptrace_unix_core_file_p PARAMS ((bfd *abfd));
char * ptrace_unix_core_file_failing_command PARAMS ((bfd *abfd));
int ptrace_unix_core_file_failing_signal PARAMS ((bfd *abfd));
boolean ptrace_unix_core_file_matches_executable_p
PARAMS ((bfd *core_bfd, bfd *exec_bfd));
/* ARGSUSED */
const bfd_target *
ptrace_unix_core_file_p (abfd)
bfd *abfd;
{
int val;
struct ptrace_user u;
struct trad_core_struct *rawptr;
val = bfd_read ((void *)&u, 1, sizeof u, abfd);
if (val != sizeof u || u.pt_magic != _BCS_PTRACE_MAGIC
|| u.pt_rev != _BCS_PTRACE_REV)
{
/* Too small to be a core file */
bfd_set_error (bfd_error_wrong_format);
return 0;
}
/* OK, we believe you. You're a core file (sure, sure). */
/* Allocate both the upage and the struct core_data at once, so
a single free() will free them both. */
rawptr = (struct trad_core_struct *)
bfd_zalloc (abfd, sizeof (struct trad_core_struct));
if (rawptr == NULL)
return 0;
abfd->tdata.trad_core_data = rawptr;
rawptr->u = u; /*Copy the uarea into the tdata part of the bfd */
/* Create the sections. This is raunchy, but bfd_close wants to free
them separately. */
core_stacksec (abfd) = (asection *) bfd_zalloc (abfd, sizeof (asection));
if (core_stacksec (abfd) == NULL)
return NULL;
core_datasec (abfd) = (asection *) bfd_zalloc (abfd, sizeof (asection));
if (core_datasec (abfd) == NULL)
return NULL;
core_regsec (abfd) = (asection *) bfd_zalloc (abfd, sizeof (asection));
if (core_regsec (abfd) == NULL)
return NULL;
core_stacksec (abfd)->name = ".stack";
core_datasec (abfd)->name = ".data";
core_regsec (abfd)->name = ".reg";
/* FIXME: Need to worry about shared memory, library data, and library
text. I don't think that any of these things are supported on the
system on which I am developing this for though. */
core_stacksec (abfd)->flags = SEC_ALLOC + SEC_LOAD + SEC_HAS_CONTENTS;
core_datasec (abfd)->flags = SEC_ALLOC + SEC_LOAD + SEC_HAS_CONTENTS;
core_regsec (abfd)->flags = SEC_HAS_CONTENTS;
core_datasec (abfd)->_raw_size = u.pt_dsize;
core_stacksec (abfd)->_raw_size = u.pt_ssize;
core_regsec (abfd)->_raw_size = sizeof(u);
core_datasec (abfd)->vma = u.pt_o_data_start;
core_stacksec (abfd)->vma = USRSTACK - u.pt_ssize;
core_regsec (abfd)->vma = 0 - sizeof(u); /* see trad-core.c */
core_datasec (abfd)->filepos = (int) u.pt_dataptr;
core_stacksec (abfd)->filepos = (int) (u.pt_dataptr + u.pt_dsize);
core_regsec (abfd)->filepos = 0; /* Register segment is ptrace_user */
/* Align to word at least */
core_stacksec (abfd)->alignment_power = 2;
core_datasec (abfd)->alignment_power = 2;
core_regsec (abfd)->alignment_power = 2;
abfd->sections = core_stacksec (abfd);
core_stacksec (abfd)->next = core_datasec (abfd);
core_datasec (abfd)->next = core_regsec (abfd);
abfd->section_count = 3;
return abfd->xvec;
}
char *
ptrace_unix_core_file_failing_command (abfd)
bfd *abfd;
{
char *com = abfd->tdata.trad_core_data->u.pt_comm;
if (*com)
return com;
else
return 0;
}
/* ARGSUSED */
int
ptrace_unix_core_file_failing_signal (abfd)
bfd *abfd;
{
return abfd->tdata.trad_core_data->u.pt_sigframe.sig_num;
}
/* ARGSUSED */
boolean
ptrace_unix_core_file_matches_executable_p (core_bfd, exec_bfd)
bfd *core_bfd, *exec_bfd;
{
/* FIXME: Use pt_timdat field of the ptrace_user structure to match
the date of the executable */
return true;
}
/* If somebody calls any byte-swapping routines, shoot them. */
void
swap_abort()
{
abort(); /* This way doesn't require any declaration for ANSI to fuck up */
}
#define NO_GET ((bfd_vma (*) PARAMS (( const bfd_byte *))) swap_abort )
#define NO_PUT ((void (*) PARAMS ((bfd_vma, bfd_byte *))) swap_abort )
#define NO_SIGNED_GET \
((bfd_signed_vma (*) PARAMS ((const bfd_byte *))) swap_abort )
const bfd_target ptrace_core_vec =
{
"trad-core",
bfd_target_unknown_flavour,
true, /* target byte order */
true, /* target headers byte order */
(HAS_RELOC | EXEC_P | /* object flags */
HAS_LINENO | HAS_DEBUG |
HAS_SYMS | HAS_LOCALS | WP_TEXT | D_PAGED),
(SEC_HAS_CONTENTS | SEC_ALLOC | SEC_LOAD | SEC_RELOC), /* section flags */
0, /* symbol prefix */
' ', /* ar_pad_char */
16, /* ar_max_namelen */
NO_GET, NO_SIGNED_GET, NO_PUT, /* 64 bit data */
NO_GET, NO_SIGNED_GET, NO_PUT, /* 32 bit data */
NO_GET, NO_SIGNED_GET, NO_PUT, /* 16 bit data */
NO_GET, NO_SIGNED_GET, NO_PUT, /* 64 bit hdrs */
NO_GET, NO_SIGNED_GET, NO_PUT, /* 32 bit hdrs */
NO_GET, NO_SIGNED_GET, NO_PUT, /* 16 bit hdrs */
{ /* bfd_check_format */
_bfd_dummy_target, /* unknown format */
_bfd_dummy_target, /* object file */
_bfd_dummy_target, /* archive */
ptrace_unix_core_file_p /* a core file */
},
{ /* bfd_set_format */
bfd_false, bfd_false,
bfd_false, bfd_false
},
{ /* bfd_write_contents */
bfd_false, bfd_false,
bfd_false, bfd_false
},
BFD_JUMP_TABLE_GENERIC (_bfd_generic),
BFD_JUMP_TABLE_COPY (_bfd_generic),
BFD_JUMP_TABLE_CORE (ptrace_unix),
BFD_JUMP_TABLE_ARCHIVE (_bfd_noarchive),
BFD_JUMP_TABLE_SYMBOLS (_bfd_nosymbols),
BFD_JUMP_TABLE_RELOCS (_bfd_norelocs),
BFD_JUMP_TABLE_WRITE (_bfd_generic),
BFD_JUMP_TABLE_LINK (_bfd_nolink),
BFD_JUMP_TABLE_DYNAMIC (_bfd_nodynamic),
(PTR) 0 /* backend_data */
};
#endif /* PTRACE_CORE */
|
