1 /* Native-dependent code for FreeBSD.
3 Copyright (C) 2002-2013 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 3 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, see <http://www.gnu.org/licenses/>. */
25 #include "gdbthread.h"
27 #include "gdb_assert.h"
29 #include <sys/types.h>
30 #include <sys/procfs.h>
31 #include <sys/sysctl.h>
36 /* Return the name of a file that can be opened to get the symbols for
37 the child process identified by PID. */
40 fbsd_pid_to_exec_file (int pid)
42 size_t len = PATH_MAX;
43 char *buf = xcalloc (len, sizeof (char));
46 #ifdef KERN_PROC_PATHNAME
51 mib[2] = KERN_PROC_PATHNAME;
53 if (sysctl (mib, 4, buf, &len, NULL, 0) == 0)
57 path = xstrprintf ("/proc/%d/file", pid);
58 if (readlink (path, buf, PATH_MAX - 1) == -1)
69 fbsd_read_mapping (FILE *mapfile, unsigned long *start, unsigned long *end,
72 /* FreeBSD 5.1-RELEASE uses a 256-byte buffer. */
74 int resident, privateresident;
78 /* As of FreeBSD 5.0-RELEASE, the layout is described in
79 /usr/src/sys/fs/procfs/procfs_map.c. Somewhere in 5.1-CURRENT a
80 new column was added to the procfs map. Therefore we can't use
81 fscanf since we need to support older releases too. */
82 if (fgets (buf, sizeof buf, mapfile) != NULL)
83 ret = sscanf (buf, "%lx %lx %d %d %lx %s", start, end,
84 &resident, &privateresident, &obj, protection);
86 return (ret != 0 && ret != EOF);
89 /* Iterate over all the memory regions in the current inferior,
90 calling FUNC for each memory region. OBFD is passed as the last
94 fbsd_find_memory_regions (find_memory_region_ftype func, void *obfd)
96 pid_t pid = ptid_get_pid (inferior_ptid);
99 unsigned long start, end, size;
101 int read, write, exec;
102 struct cleanup *cleanup;
104 mapfilename = xstrprintf ("/proc/%ld/map", (long) pid);
105 cleanup = make_cleanup (xfree, mapfilename);
106 mapfile = fopen (mapfilename, "r");
108 error (_("Couldn't open %s."), mapfilename);
109 make_cleanup_fclose (mapfile);
112 fprintf_filtered (gdb_stdout,
113 "Reading memory regions from %s\n", mapfilename);
115 /* Now iterate until end-of-file. */
116 while (fbsd_read_mapping (mapfile, &start, &end, &protection[0]))
120 read = (strchr (protection, 'r') != 0);
121 write = (strchr (protection, 'w') != 0);
122 exec = (strchr (protection, 'x') != 0);
126 fprintf_filtered (gdb_stdout,
127 "Save segment, %ld bytes at %s (%c%c%c)\n",
128 size, paddress (target_gdbarch (), start),
134 /* Invoke the callback function to create the corefile segment.
135 Pass MODIFIED as true, we do not know the real modification state. */
136 func (start, size, read, write, exec, 1, obfd);
139 do_cleanups (cleanup);
144 find_signalled_thread (struct thread_info *info, void *data)
146 if (info->suspend.stop_signal != GDB_SIGNAL_0
147 && ptid_get_pid (info->ptid) == ptid_get_pid (inferior_ptid))
153 static enum gdb_signal
154 find_stop_signal (void)
156 struct thread_info *info =
157 iterate_over_threads (find_signalled_thread, NULL);
160 return info->suspend.stop_signal;
165 /* Create appropriate note sections for a corefile, returning them in
169 fbsd_make_corefile_notes (bfd *obfd, int *note_size)
171 const struct regcache *regcache = get_current_regcache ();
172 struct gdbarch *gdbarch = get_regcache_arch (regcache);
175 char *note_data = NULL;
176 Elf_Internal_Ehdr *i_ehdrp;
177 const struct regset *regset;
180 /* Put a "FreeBSD" label in the ELF header. */
181 i_ehdrp = elf_elfheader (obfd);
182 i_ehdrp->e_ident[EI_OSABI] = ELFOSABI_FREEBSD;
184 gdb_assert (gdbarch_regset_from_core_section_p (gdbarch));
187 regset = gdbarch_regset_from_core_section (gdbarch, ".reg", size);
188 gdb_assert (regset && regset->collect_regset);
189 regset->collect_regset (regset, regcache, -1, &gregs, size);
191 note_data = elfcore_write_prstatus (obfd, note_data, note_size,
192 ptid_get_pid (inferior_ptid),
193 find_stop_signal (), &gregs);
195 size = sizeof fpregs;
196 regset = gdbarch_regset_from_core_section (gdbarch, ".reg2", size);
197 gdb_assert (regset && regset->collect_regset);
198 regset->collect_regset (regset, regcache, -1, &fpregs, size);
200 note_data = elfcore_write_prfpreg (obfd, note_data, note_size,
201 &fpregs, sizeof (fpregs));
203 if (get_exec_file (0))
205 const char *fname = lbasename (get_exec_file (0));
206 char *psargs = xstrdup (fname);
208 if (get_inferior_args ())
209 psargs = reconcat (psargs, psargs, " ", get_inferior_args (),
212 note_data = elfcore_write_prpsinfo (obfd, note_data, note_size,
216 make_cleanup (xfree, note_data);