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-rw-r--r--gdb/fbsd-proc.c173
1 files changed, 173 insertions, 0 deletions
diff --git a/gdb/fbsd-proc.c b/gdb/fbsd-proc.c
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+/* 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 <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;
+
+ fill_gregset (&gregs, -1);
+ note_data = (char *) elfcore_write_prstatus (obfd,
+ note_data,
+ note_size,
+ ptid_get_pid (inferior_ptid),
+ stop_signal,
+ &gregs);
+
+ fill_fpregset (&fpregs, -1);
+ note_data = (char *) 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 = (char *) 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);
+}