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
|
/* FreeBSD-specific methods for using the /proc file system.
Copyright 2002 Free Software Foundation, Inc.
This file is part of GDB.
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. */
#include "defs.h"
#include "gdbcore.h"
#include "inferior.h"
#include "gdb_string.h"
#include <sys/procfs.h>
#include <sys/types.h>
#include "elf-bfd.h"
#include "gregset.h"
char *
child_pid_to_exec_file (int pid)
{
char *path;
char *buf;
xasprintf (&path, "/proc/%d/file", pid);
buf = xcalloc (MAXPATHLEN, sizeof (char));
make_cleanup (xfree, path);
make_cleanup (xfree, buf);
if (readlink (path, buf, MAXPATHLEN) > 0)
return buf;
return NULL;
}
static int
read_mapping (FILE *mapfile,
unsigned long *start,
unsigned long *end,
char *protection)
{
int resident, privateresident;
unsigned long obj;
int ref_count, shadow_count;
unsigned flags;
char cow[5], access[4];
char type[8];
int ret;
/* The layout is described in /usr/src/miscfs/procfs/procfs_map.c. */
ret = fscanf (mapfile, "%lx %lx %d %d %lx %s %d %d %x %s %s %s\n",
start, end,
&resident, &privateresident, &obj,
protection,
&ref_count, &shadow_count, &flags, cow, access, type);
return (ret != 0 && ret != EOF);
}
static int
fbsd_find_memory_regions (int (*func) (CORE_ADDR,
unsigned long,
int, int, int,
void *),
void *obfd)
{
pid_t pid = ptid_get_pid (inferior_ptid);
char *mapfilename;
FILE *mapfile;
unsigned long start, end, size;
char protection[4];
int read, write, exec;
xasprintf (&mapfilename, "/proc/%ld/map", (long) pid);
mapfile = fopen (mapfilename, "r");
if (mapfile == NULL)
error ("Couldn't open %s\n", mapfilename);
if (info_verbose)
fprintf_filtered (gdb_stdout,
"Reading memory regions from %s\n", mapfilename);
/* Now iterate until end-of-file. */
while (read_mapping (mapfile, &start, &end, &protection[0]))
{
size = end - start;
read = (strchr (protection, 'r') != 0);
write = (strchr (protection, 'w') != 0);
exec = (strchr (protection, 'x') != 0);
if (info_verbose)
{
fprintf_filtered (gdb_stdout,
"Save segment, %ld bytes at 0x%s (%c%c%c)\n",
size, paddr_nz (start),
read ? 'r' : '-',
write ? 'w' : '-',
exec ? 'x' : '-');
}
/* Invoke the callback function to create the corefile segment. */
func (start, size, read, write, exec, obfd);
}
fclose (mapfile);
return 0;
}
static char *
fbsd_make_corefile_notes (bfd *obfd, int *note_size)
{
gregset_t gregs;
fpregset_t fpregs;
char *note_data = NULL;
Elf_Internal_Ehdr *i_ehdrp;
/* Put a "FreeBSD" label in the ELF header. */
i_ehdrp = elf_elfheader (obfd);
i_ehdrp->e_ident[EI_OSABI] = ELFOSABI_FREEBSD;
fill_gregset (&gregs, -1);
note_data = elfcore_write_prstatus (obfd, note_data, note_size,
ptid_get_pid (inferior_ptid),
stop_signal, &gregs);
fill_fpregset (&fpregs, -1);
note_data = elfcore_write_prfpreg (obfd, note_data, note_size,
&fpregs, sizeof (fpregs));
if (get_exec_file (0))
{
char *fname = strrchr (get_exec_file (0), '/') + 1;
char *psargs = xstrdup (fname);
if (get_inferior_args ())
psargs = reconcat (psargs, psargs, " ", get_inferior_args (), NULL);
note_data = elfcore_write_prpsinfo (obfd, note_data, note_size,
fname, psargs);
}
make_cleanup (xfree, note_data);
return note_data;
}
void
_initialize_fbsd_proc (void)
{
extern void inftarg_set_find_memory_regions ();
extern void inftarg_set_make_corefile_notes ();
inftarg_set_find_memory_regions (fbsd_find_memory_regions);
inftarg_set_make_corefile_notes (fbsd_make_corefile_notes);
}
|
