1 /* FreeBSD-specific methods for using the /proc file system.
3 Copyright 2002, 2003 Free Software Foundation, Inc.
5 This file is part of GDB.
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,
20 Boston, MA 02111-1307, USA. */
28 #include "gdb_assert.h"
29 #include "gdb_string.h"
30 #include <sys/procfs.h>
31 #include <sys/types.h>
36 child_pid_to_exec_file (int pid
)
41 path
= xstrprintf ("/proc/%d/file", pid
);
42 buf
= xcalloc (MAXPATHLEN
, sizeof (char));
43 make_cleanup (xfree
, path
);
44 make_cleanup (xfree
, buf
);
46 if (readlink (path
, buf
, MAXPATHLEN
) > 0)
53 read_mapping (FILE *mapfile
, unsigned long *start
, unsigned long *end
,
56 /* FreeBSD 5.1-RELEASE uses a 256-byte buffer. */
58 int resident
, privateresident
;
62 /* As of FreeBSD 5.0-RELEASE, the layout is described in
63 /usr/src/sys/fs/procfs/procfs_map.c. Somewhere in 5.1-CURRENT a
64 new column was added to the procfs map. Therefore we can't use
65 fscanf since we need to support older releases too. */
66 if (fgets (buf
, sizeof buf
, mapfile
) != NULL
)
67 ret
= sscanf (buf
, "%lx %lx %d %d %lx %s", start
, end
,
68 &resident
, &privateresident
, &obj
, protection
);
70 return (ret
!= 0 && ret
!= EOF
);
74 fbsd_find_memory_regions (int (*func
) (CORE_ADDR
, unsigned long,
75 int, int, int, void *),
78 pid_t pid
= ptid_get_pid (inferior_ptid
);
81 unsigned long start
, end
, size
;
83 int read
, write
, exec
;
85 mapfilename
= xstrprintf ("/proc/%ld/map", (long) pid
);
86 mapfile
= fopen (mapfilename
, "r");
88 error ("Couldn't open %s\n", mapfilename
);
91 fprintf_filtered (gdb_stdout
,
92 "Reading memory regions from %s\n", mapfilename
);
94 /* Now iterate until end-of-file. */
95 while (read_mapping (mapfile
, &start
, &end
, &protection
[0]))
99 read
= (strchr (protection
, 'r') != 0);
100 write
= (strchr (protection
, 'w') != 0);
101 exec
= (strchr (protection
, 'x') != 0);
105 fprintf_filtered (gdb_stdout
,
106 "Save segment, %ld bytes at 0x%s (%c%c%c)\n",
107 size
, paddr_nz (start
),
113 /* Invoke the callback function to create the corefile segment. */
114 func (start
, size
, read
, write
, exec
, obfd
);
122 fbsd_make_corefile_notes (bfd
*obfd
, int *note_size
)
124 struct gdbarch
*gdbarch
= current_gdbarch
;
125 const struct regcache
*regcache
= current_regcache
;
128 char *note_data
= NULL
;
129 Elf_Internal_Ehdr
*i_ehdrp
;
130 const struct regset
*regset
;
133 /* Put a "FreeBSD" label in the ELF header. */
134 i_ehdrp
= elf_elfheader (obfd
);
135 i_ehdrp
->e_ident
[EI_OSABI
] = ELFOSABI_FREEBSD
;
137 gdb_assert (gdbarch_regset_from_core_section_p (gdbarch
));
140 regset
= gdbarch_regset_from_core_section (gdbarch
, ".reg", size
);
141 gdb_assert (regset
&& regset
->collect_regset
);
142 regset
->collect_regset (regset
, regcache
, -1, &gregs
, size
);
144 note_data
= elfcore_write_prstatus (obfd
, note_data
, note_size
,
145 ptid_get_pid (inferior_ptid
),
146 stop_signal
, &gregs
);
148 size
= sizeof fpregs
;
149 regset
= gdbarch_regset_from_core_section (gdbarch
, ".reg2", size
);
150 gdb_assert (regset
&& regset
->collect_regset
);
151 regset
->collect_regset (regset
, regcache
, -1, &fpregs
, size
);
153 note_data
= elfcore_write_prfpreg (obfd
, note_data
, note_size
,
154 &fpregs
, sizeof (fpregs
));
156 if (get_exec_file (0))
158 char *fname
= strrchr (get_exec_file (0), '/') + 1;
159 char *psargs
= xstrdup (fname
);
161 if (get_inferior_args ())
162 psargs
= reconcat (psargs
, psargs
, " ", get_inferior_args (), NULL
);
164 note_data
= elfcore_write_prpsinfo (obfd
, note_data
, note_size
,
168 make_cleanup (xfree
, note_data
);
174 _initialize_fbsd_proc (void)
176 extern void inftarg_set_find_memory_regions ();
177 extern void inftarg_set_make_corefile_notes ();
179 inftarg_set_find_memory_regions (fbsd_find_memory_regions
);
180 inftarg_set_make_corefile_notes (fbsd_make_corefile_notes
);
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