darling-gdb/gdb/fbsd-nat.c
Pedro Alves 2020b7abd8 Remove the global stop_signal in favour of a per-thread
stop_signal.

	* inferior.h (stop_signal): Delete.
	* gdbthread.h (save_infrun_state, load_infrun_state): Remove
	stop_signal argument.
	* thread.c (load_infrun_state, save_infrun_state): Remove
	stop_signal argument.  Don't reference it.

	* infcmd.c (stop_signal): Delete.
	(program_info): Adjust.
	* infrun.c (resume): Clear stop_signal.
	(proceed): Adjust.  Pass the last stop_signal to the thread we're
	resuming.
	(context_switch): Don't context-switch stop_signal.
	(handle_inferior_event, keep_going): Adjust.
	(save_inferior_status, restore_inferior_status): Adjust.

	* fbsd-nat.c: Include "gdbthread.h".
	(find_signalled_thread, find_stop_signal): New.
	(fbsd_make_corefile_notes): Use it.
	* fork-child.c (startup_inferior): Adjust.

	* linux-nat.c (get_pending_status): Adjust.
	(linux_nat_do_thread_registers): Adjust.
	(find_signalled_thread, find_stop_signal): New.
	(linux_nat_do_thread_registers): Add stop_signal parameter.
	(struct linux_nat_corefile_thread_data): Add stop_signal member.
	(linux_nat_corefile_thread_callback): Pass stop_signal.
	(linux_nat_do_registers): Delete.
	(linux_nat_make_corefile_notes): Use find_stop_signal.  Assume
	there's always a thread.

	* procfs.c (find_signalled_thread, find_stop_signal): New.
	(find_stop_signal): New.
	(procfs_do_thread_registers): Add stop_signal parameter.
	(struct procfs_corefile_thread_data): Add stop_signal member.
	(procfs_corefile_thread_callback): Pass args->stop_signal.
	(procfs_make_note_section): Find the last stop_signal.

	* solib-irix.c: Include gdbthread.h.
	(irix_solib_create_inferior_hook): Adjust.
	* solib-osf.c: Include gdbthread.h.
	(osf_solib_create_inferior_hook): Adjust.
	* solib-sunos.c: Include gdbthread.h.
	(sunos_solib_create_inferior_hook): Adjust.
	* solib-svr4.c: Include gdbthread.h.
	(svr4_solib_create_inferior_hook): Adjust.

	* win32-nat.c (do_initial_win32_stuff): Adjust.
2008-09-08 21:51:18 +00:00

216 lines
5.8 KiB
C

/* Native-dependent code for FreeBSD.
Copyright (C) 2002, 2003, 2004, 2007, 2008 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 3 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, see <http://www.gnu.org/licenses/>. */
#include "defs.h"
#include "gdbcore.h"
#include "inferior.h"
#include "regcache.h"
#include "regset.h"
#include "gdbthread.h"
#include "gdb_assert.h"
#include "gdb_string.h"
#include <sys/types.h>
#include <sys/procfs.h>
#include <sys/sysctl.h>
#include "elf-bfd.h"
#include "fbsd-nat.h"
/* Return a the name of file that can be opened to get the symbols for
the child process identified by PID. */
char *
fbsd_pid_to_exec_file (int pid)
{
size_t len = MAXPATHLEN;
char *buf = xcalloc (len, sizeof (char));
char *path;
#ifdef KERN_PROC_PATHNAME
int mib[4];
mib[0] = CTL_KERN;
mib[1] = KERN_PROC;
mib[2] = KERN_PROC_PATHNAME;
mib[3] = pid;
if (sysctl (mib, 4, buf, &len, NULL, 0) == 0)
return buf;
#endif
path = xstrprintf ("/proc/%d/file", pid);
if (readlink (path, buf, MAXPATHLEN) == -1)
{
xfree (buf);
buf = NULL;
}
xfree (path);
return buf;
}
static int
fbsd_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);
}
/* Iterate over all the memory regions in the current inferior,
calling FUNC for each memory region. OBFD is passed as the last
argument to FUNC. */
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;
mapfilename = xstrprintf ("/proc/%ld/map", (long) pid);
mapfile = fopen (mapfilename, "r");
if (mapfile == NULL)
error (_("Couldn't open %s."), mapfilename);
if (info_verbose)
fprintf_filtered (gdb_stdout,
"Reading memory regions from %s\n", mapfilename);
/* Now iterate until end-of-file. */
while (fbsd_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 int
find_signalled_thread (struct thread_info *info, void *data)
{
if (info->stop_signal != TARGET_SIGNAL_0
&& ptid_get_pid (info->ptid) == ptid_get_pid (inferior_ptid))
return 1;
return 0;
}
static enum target_signal
find_stop_signal (void)
{
struct thread_info *info =
iterate_over_threads (find_signalled_thread, NULL);
if (info)
return info->stop_signal;
else
return TARGET_SIGNAL_0;
}
/* Create appropriate note sections for a corefile, returning them in
allocated memory. */
char *
fbsd_make_corefile_notes (bfd *obfd, int *note_size)
{
const struct regcache *regcache = get_current_regcache ();
struct gdbarch *gdbarch = get_regcache_arch (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),
find_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;
}