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 xasprintf (&path, "/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 xasprintf (&mapfilename, "/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);