[deliverable/binutils-gdb.git] / gdb / fbsd-proc.c

/* 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 "gdb_string.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;
  Elf_Internal_Ehdr *i_ehdrp;

  /* Put a "FreeBSD" label in the ELF header.  */
  i_ehdrp = elf_elfheader (obfd);
  i_ehdrp->e_ident[EI_OSABI] = ELFOSABI_FREEBSD;

  fill_gregset (&gregs, -1);
  note_data = elfcore_write_prstatus (obfd, note_data, note_size,
				      ptid_get_pid (inferior_ptid),
				      stop_signal, &gregs);

  fill_fpregset (&fpregs, -1);
  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;
}
\f

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);
}
Commit	Line	Data
a90cd31d MK	1	/* FreeBSD-specific methods for using the /proc file system.
	2	Copyright 2002 Free Software Foundation, Inc.
	3
	4	This file is part of GDB.
	5
	6	This program is free software; you can redistribute it and/or modify
	7	it under the terms of the GNU General Public License as published by
	8	the Free Software Foundation; either version 2 of the License, or
	9	(at your option) any later version.
	10
	11	This program is distributed in the hope that it will be useful,
	12	but WITHOUT ANY WARRANTY; without even the implied warranty of
	13	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	14	GNU General Public License for more details.
	15
	16	You should have received a copy of the GNU General Public License
	17	along with this program; if not, write to the Free Software
	18	Foundation, Inc., 59 Temple Place - Suite 330,
	19	Boston, MA 02111-1307, USA. */
	20
	21	#include "defs.h"
	22	#include "gdbcore.h"
	23	#include "inferior.h"
b66d6d2e	24	#include "gdb_string.h"
a90cd31d MK	25
	26	#include <sys/procfs.h>
	27	#include <sys/types.h>
	28
	29	#include "elf-bfd.h"
	30
	31	#include "gregset.h"
	32
	33	char *
	34	child_pid_to_exec_file (int pid)
	35	{
	36	char *path;
	37	char *buf;
	38
a4e4e501	39	xasprintf (&path, "/proc/%d/file", pid);
a90cd31d MK	40	buf = xcalloc (MAXPATHLEN, sizeof (char));
	41	make_cleanup (xfree, path);
	42	make_cleanup (xfree, buf);
	43
	44	if (readlink (path, buf, MAXPATHLEN) > 0)
	45	return buf;
	46
	47	return NULL;
	48	}
	49
	50	static int
	51	read_mapping (FILE *mapfile,
	52	unsigned long *start,
	53	unsigned long *end,
	54	char *protection)
	55	{
	56	int resident, privateresident;
	57	unsigned long obj;
	58	int ref_count, shadow_count;
	59	unsigned flags;
	60	char cow[5], access[4];
	61	char type[8];
	62	int ret;
	63
	64	/* The layout is described in /usr/src/miscfs/procfs/procfs_map.c. */
	65	ret = fscanf (mapfile, "%lx %lx %d %d %lx %s %d %d %x %s %s %s\n",
	66	start, end,
	67	&resident, &privateresident, &obj,
	68	protection,
	69	&ref_count, &shadow_count, &flags, cow, access, type);
	70
	71	return (ret != 0 && ret != EOF);
	72	}
	73
	74	static int
	75	fbsd_find_memory_regions (int (*func) (CORE_ADDR,
	76	unsigned long,
	77	int, int, int,
	78	void *),
	79	void *obfd)
	80	{
	81	pid_t pid = ptid_get_pid (inferior_ptid);
	82	char *mapfilename;
	83	FILE *mapfile;
	84	unsigned long start, end, size;
	85	char protection[4];
	86	int read, write, exec;
	87
a4e4e501	88	xasprintf (&mapfilename, "/proc/%ld/map", (long) pid);
a90cd31d MK	89	mapfile = fopen (mapfilename, "r");
	90	if (mapfile == NULL)
	91	error ("Couldn't open %s\n", mapfilename);
	92
	93	if (info_verbose)
	94	fprintf_filtered (gdb_stdout,
	95	"Reading memory regions from %s\n", mapfilename);
	96
	97	/* Now iterate until end-of-file. */
	98	while (read_mapping (mapfile, &start, &end, &protection[0]))
	99	{
	100	size = end - start;
	101
	102	read = (strchr (protection, 'r') != 0);
	103	write = (strchr (protection, 'w') != 0);
	104	exec = (strchr (protection, 'x') != 0);
	105
	106	if (info_verbose)
	107	{
	108	fprintf_filtered (gdb_stdout,
	109	"Save segment, %ld bytes at 0x%s (%c%c%c)\n",
	110	size, paddr_nz (start),
	111	read ? 'r' : '-',
	112	write ? 'w' : '-',
	113	exec ? 'x' : '-');
	114	}
	115
	116	/* Invoke the callback function to create the corefile segment. */
	117	func (start, size, read, write, exec, obfd);
	118	}
	119
	120	fclose (mapfile);
	121	return 0;
	122	}
	123
	124	static char *
	125	fbsd_make_corefile_notes (bfd obfd, int note_size)
	126	{
	127	gregset_t gregs;
	128	fpregset_t fpregs;
	129	char *note_data = NULL;
9a12a2a0 MK	130	Elf_Internal_Ehdr *i_ehdrp;
	131
	132	/* Put a "FreeBSD" label in the ELF header. */
	133	i_ehdrp = elf_elfheader (obfd);
	134	i_ehdrp->e_ident[EI_OSABI] = ELFOSABI_FREEBSD;
a90cd31d MK	135
a90cd31d MK	136	fill_gregset (&gregs, -1);
25e60c9b MK	137	note_data = elfcore_write_prstatus (obfd, note_data, note_size,
	138	ptid_get_pid (inferior_ptid),
	139	stop_signal, &gregs);
a90cd31d MK	140
a90cd31d MK	141	fill_fpregset (&fpregs, -1);
25e60c9b MK	142	note_data = elfcore_write_prfpreg (obfd, note_data, note_size,
25e60c9b MK	143	&fpregs, sizeof (fpregs));
a90cd31d MK	144
	145	if (get_exec_file (0))
	146	{
	147	char *fname = strrchr (get_exec_file (0), '/') + 1;
a4e4e501	148	char *psargs = xstrdup (fname);
a90cd31d MK	149
	150	if (get_inferior_args ())
	151	psargs = reconcat (psargs, psargs, " ", get_inferior_args (), NULL);
	152
25e60c9b MK	153	note_data = elfcore_write_prpsinfo (obfd, note_data, note_size,
25e60c9b MK	154	fname, psargs);
a90cd31d MK	155	}
	156
	157	make_cleanup (xfree, note_data);
	158	return note_data;
	159	}
	160	\f
	161
	162	void
	163	_initialize_fbsd_proc (void)
	164	{
	165	extern void inftarg_set_find_memory_regions ();
	166	extern void inftarg_set_make_corefile_notes ();
	167
	168	inftarg_set_find_memory_regions (fbsd_find_memory_regions);
	169	inftarg_set_make_corefile_notes (fbsd_make_corefile_notes);
	170	}