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/* FreeBSD-specific methods for using the /proc file system.
Copyright 2002, 2003 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 "regcache.h"
#include "regset.h"
#include "gdb_assert.h"
#include "gdb_string.h"
#include <sys/procfs.h>
#include <sys/types.h>
#include "elf-bfd.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)
{
/* FreeBSD 5.1-RELEASE uses a 256-byte buffer. */
char buf[256];
int resident, privateresident;
unsigned long obj;
int ret = EOF;
/* As of FreeBSD 5.0-RELEASE, the layout is described in
/usr/src/sys/fs/procfs/procfs_map.c. Somewhere in 5.1-CURRENT a
new column was added to the procfs map. Therefore we can't use
fscanf since we need to support older releases too. */
if (fgets (buf, sizeof buf, mapfile) != NULL)
ret = sscanf (buf, "%lx %lx %d %d %lx %s", start, end,
&resident, &privateresident, &obj, protection);
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)
{
struct gdbarch *gdbarch = current_gdbarch;
const struct regcache *regcache = current_regcache;
gregset_t gregs;
fpregset_t fpregs;
char *note_data = NULL;
Elf_Internal_Ehdr *i_ehdrp;
const struct regset *regset;
size_t size;
/* Put a "FreeBSD" label in the ELF header. */
i_ehdrp = elf_elfheader (obfd);
i_ehdrp->e_ident[EI_OSABI] = ELFOSABI_FREEBSD;
gdb_assert (gdbarch_regset_from_core_section_p (gdbarch));
size = sizeof gregs;
regset = gdbarch_regset_from_core_section (gdbarch, ".reg", size);
gdb_assert (regset && regset->collect_regset);
regset->collect_regset (regset, regcache, -1, &gregs, size);
note_data = elfcore_write_prstatus (obfd, note_data, note_size,
ptid_get_pid (inferior_ptid),
stop_signal, &gregs);
size = sizeof fpregs;
regset = gdbarch_regset_from_core_section (gdbarch, ".reg2", size);
gdb_assert (regset && regset->collect_regset);
regset->collect_regset (regset, regcache, -1, &fpregs, size);
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);
}
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