/* Generate a core file for the inferior process.
|
/* Generate a core file for the inferior process.
|
|
|
Copyright (C) 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010
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Copyright (C) 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010
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Free Software Foundation, Inc.
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Free Software Foundation, Inc.
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|
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This file is part of GDB.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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(at your option) any later version.
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|
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This program is distributed in the hope that it will be useful,
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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You should have received a copy of the GNU General Public License
|
along with this program. If not, see <http://www.gnu.org/licenses/>. */
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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|
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#include "defs.h"
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#include "defs.h"
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#include "elf-bfd.h"
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#include "elf-bfd.h"
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#include "infcall.h"
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#include "infcall.h"
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#include "inferior.h"
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#include "inferior.h"
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#include "gdbcore.h"
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#include "gdbcore.h"
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#include "objfiles.h"
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#include "objfiles.h"
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#include "solib.h"
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#include "solib.h"
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#include "symfile.h"
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#include "symfile.h"
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#include "arch-utils.h"
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#include "arch-utils.h"
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#include "completer.h"
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#include "completer.h"
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#include "gcore.h"
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#include "gcore.h"
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#include "cli/cli-decode.h"
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#include "cli/cli-decode.h"
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#include "gdb_assert.h"
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#include "gdb_assert.h"
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#include <fcntl.h>
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#include <fcntl.h>
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#include "regcache.h"
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#include "regcache.h"
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#include "regset.h"
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#include "regset.h"
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|
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/* The largest amount of memory to read from the target at once. We
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/* The largest amount of memory to read from the target at once. We
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must throttle it to limit the amount of memory used by GDB during
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must throttle it to limit the amount of memory used by GDB during
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generate-core-file for programs with large resident data. */
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generate-core-file for programs with large resident data. */
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#define MAX_COPY_BYTES (1024 * 1024)
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#define MAX_COPY_BYTES (1024 * 1024)
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|
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static const char *default_gcore_target (void);
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static const char *default_gcore_target (void);
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static enum bfd_architecture default_gcore_arch (void);
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static enum bfd_architecture default_gcore_arch (void);
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static unsigned long default_gcore_mach (void);
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static unsigned long default_gcore_mach (void);
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static int gcore_memory_sections (bfd *);
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static int gcore_memory_sections (bfd *);
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|
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/* create_gcore_bfd -- helper for gcore_command (exported).
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/* create_gcore_bfd -- helper for gcore_command (exported).
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Open a new bfd core file for output, and return the handle. */
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Open a new bfd core file for output, and return the handle. */
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|
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bfd *
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bfd *
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create_gcore_bfd (char *filename)
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create_gcore_bfd (char *filename)
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{
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{
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bfd *obfd = bfd_openw (filename, default_gcore_target ());
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bfd *obfd = bfd_openw (filename, default_gcore_target ());
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if (!obfd)
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if (!obfd)
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error (_("Failed to open '%s' for output."), filename);
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error (_("Failed to open '%s' for output."), filename);
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bfd_set_format (obfd, bfd_core);
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bfd_set_format (obfd, bfd_core);
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bfd_set_arch_mach (obfd, default_gcore_arch (), default_gcore_mach ());
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bfd_set_arch_mach (obfd, default_gcore_arch (), default_gcore_mach ());
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return obfd;
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return obfd;
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}
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}
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/* write_gcore_file -- helper for gcore_command (exported).
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/* write_gcore_file -- helper for gcore_command (exported).
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Compose and write the corefile data to the core file. */
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Compose and write the corefile data to the core file. */
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void
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void
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write_gcore_file (bfd *obfd)
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write_gcore_file (bfd *obfd)
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{
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{
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void *note_data = NULL;
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void *note_data = NULL;
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int note_size = 0;
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int note_size = 0;
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asection *note_sec = NULL;
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asection *note_sec = NULL;
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|
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/* An external target method must build the notes section. */
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/* An external target method must build the notes section. */
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note_data = target_make_corefile_notes (obfd, ¬e_size);
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note_data = target_make_corefile_notes (obfd, ¬e_size);
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|
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/* Create the note section. */
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/* Create the note section. */
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if (note_data != NULL && note_size != 0)
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if (note_data != NULL && note_size != 0)
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{
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{
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note_sec = bfd_make_section_anyway_with_flags (obfd, "note0",
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note_sec = bfd_make_section_anyway_with_flags (obfd, "note0",
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SEC_HAS_CONTENTS
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SEC_HAS_CONTENTS
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| SEC_READONLY
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| SEC_READONLY
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| SEC_ALLOC);
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| SEC_ALLOC);
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if (note_sec == NULL)
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if (note_sec == NULL)
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error (_("Failed to create 'note' section for corefile: %s"),
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error (_("Failed to create 'note' section for corefile: %s"),
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bfd_errmsg (bfd_get_error ()));
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bfd_errmsg (bfd_get_error ()));
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|
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bfd_set_section_vma (obfd, note_sec, 0);
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bfd_set_section_vma (obfd, note_sec, 0);
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bfd_set_section_alignment (obfd, note_sec, 0);
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bfd_set_section_alignment (obfd, note_sec, 0);
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bfd_set_section_size (obfd, note_sec, note_size);
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bfd_set_section_size (obfd, note_sec, note_size);
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}
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}
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|
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/* Now create the memory/load sections. */
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/* Now create the memory/load sections. */
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if (gcore_memory_sections (obfd) == 0)
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if (gcore_memory_sections (obfd) == 0)
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error (_("gcore: failed to get corefile memory sections from target."));
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error (_("gcore: failed to get corefile memory sections from target."));
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|
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/* Write out the contents of the note section. */
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/* Write out the contents of the note section. */
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if (note_data != NULL && note_size != 0)
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if (note_data != NULL && note_size != 0)
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{
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{
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if (!bfd_set_section_contents (obfd, note_sec, note_data, 0, note_size))
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if (!bfd_set_section_contents (obfd, note_sec, note_data, 0, note_size))
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warning (_("writing note section (%s)"),
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warning (_("writing note section (%s)"),
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bfd_errmsg (bfd_get_error ()));
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bfd_errmsg (bfd_get_error ()));
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}
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}
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}
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}
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|
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static void
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static void
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do_bfd_delete_cleanup (void *arg)
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do_bfd_delete_cleanup (void *arg)
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{
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{
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bfd *obfd = arg;
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bfd *obfd = arg;
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const char *filename = obfd->filename;
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const char *filename = obfd->filename;
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|
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bfd_close (arg);
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bfd_close (arg);
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unlink (filename);
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unlink (filename);
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}
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}
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/* gcore_command -- implements the 'gcore' command.
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/* gcore_command -- implements the 'gcore' command.
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Generate a core file from the inferior process. */
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Generate a core file from the inferior process. */
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|
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static void
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static void
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gcore_command (char *args, int from_tty)
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gcore_command (char *args, int from_tty)
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{
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{
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struct cleanup *old_chain;
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struct cleanup *old_chain;
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char *corefilename, corefilename_buffer[40];
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char *corefilename, corefilename_buffer[40];
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bfd *obfd;
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bfd *obfd;
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|
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/* No use generating a corefile without a target process. */
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/* No use generating a corefile without a target process. */
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if (!target_has_execution)
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if (!target_has_execution)
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noprocess ();
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noprocess ();
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if (args && *args)
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if (args && *args)
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corefilename = args;
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corefilename = args;
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else
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else
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{
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{
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/* Default corefile name is "core.PID". */
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/* Default corefile name is "core.PID". */
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sprintf (corefilename_buffer, "core.%d", PIDGET (inferior_ptid));
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sprintf (corefilename_buffer, "core.%d", PIDGET (inferior_ptid));
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corefilename = corefilename_buffer;
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corefilename = corefilename_buffer;
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}
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}
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|
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if (info_verbose)
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if (info_verbose)
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fprintf_filtered (gdb_stdout,
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fprintf_filtered (gdb_stdout,
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"Opening corefile '%s' for output.\n", corefilename);
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"Opening corefile '%s' for output.\n", corefilename);
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|
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/* Open the output file. */
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/* Open the output file. */
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obfd = create_gcore_bfd (corefilename);
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obfd = create_gcore_bfd (corefilename);
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|
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/* Need a cleanup that will close and delete the file. */
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/* Need a cleanup that will close and delete the file. */
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old_chain = make_cleanup (do_bfd_delete_cleanup, obfd);
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old_chain = make_cleanup (do_bfd_delete_cleanup, obfd);
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/* Call worker function. */
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/* Call worker function. */
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write_gcore_file (obfd);
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write_gcore_file (obfd);
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/* Succeeded. */
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/* Succeeded. */
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fprintf_filtered (gdb_stdout, "Saved corefile %s\n", corefilename);
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fprintf_filtered (gdb_stdout, "Saved corefile %s\n", corefilename);
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discard_cleanups (old_chain);
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discard_cleanups (old_chain);
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bfd_close (obfd);
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bfd_close (obfd);
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}
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}
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static unsigned long
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static unsigned long
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default_gcore_mach (void)
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default_gcore_mach (void)
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{
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{
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#if 1 /* See if this even matters... */
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#if 1 /* See if this even matters... */
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return 0;
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return 0;
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#else
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#else
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|
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const struct bfd_arch_info *bfdarch = gdbarch_bfd_arch_info (target_gdbarch);
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const struct bfd_arch_info *bfdarch = gdbarch_bfd_arch_info (target_gdbarch);
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if (bfdarch != NULL)
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if (bfdarch != NULL)
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return bfdarch->mach;
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return bfdarch->mach;
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if (exec_bfd == NULL)
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if (exec_bfd == NULL)
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error (_("Can't find default bfd machine type (need execfile)."));
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error (_("Can't find default bfd machine type (need execfile)."));
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|
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return bfd_get_mach (exec_bfd);
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return bfd_get_mach (exec_bfd);
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#endif /* 1 */
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#endif /* 1 */
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}
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}
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|
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static enum bfd_architecture
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static enum bfd_architecture
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default_gcore_arch (void)
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default_gcore_arch (void)
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{
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{
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const struct bfd_arch_info *bfdarch = gdbarch_bfd_arch_info (target_gdbarch);
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const struct bfd_arch_info *bfdarch = gdbarch_bfd_arch_info (target_gdbarch);
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|
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if (bfdarch != NULL)
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if (bfdarch != NULL)
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return bfdarch->arch;
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return bfdarch->arch;
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if (exec_bfd == NULL)
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if (exec_bfd == NULL)
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error (_("Can't find bfd architecture for corefile (need execfile)."));
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error (_("Can't find bfd architecture for corefile (need execfile)."));
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|
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return bfd_get_arch (exec_bfd);
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return bfd_get_arch (exec_bfd);
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}
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}
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|
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static const char *
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static const char *
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default_gcore_target (void)
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default_gcore_target (void)
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{
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{
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/* The gdbarch may define a target to use for core files. */
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/* The gdbarch may define a target to use for core files. */
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if (gdbarch_gcore_bfd_target_p (target_gdbarch))
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if (gdbarch_gcore_bfd_target_p (target_gdbarch))
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return gdbarch_gcore_bfd_target (target_gdbarch);
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return gdbarch_gcore_bfd_target (target_gdbarch);
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|
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/* Otherwise, try to fall back to the exec_bfd target. This will probably
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/* Otherwise, try to fall back to the exec_bfd target. This will probably
|
not work for non-ELF targets. */
|
not work for non-ELF targets. */
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if (exec_bfd == NULL)
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if (exec_bfd == NULL)
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return NULL;
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return NULL;
|
else
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else
|
return bfd_get_target (exec_bfd);
|
return bfd_get_target (exec_bfd);
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}
|
}
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|
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/* Derive a reasonable stack segment by unwinding the target stack,
|
/* Derive a reasonable stack segment by unwinding the target stack,
|
and store its limits in *BOTTOM and *TOP. Return non-zero if
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and store its limits in *BOTTOM and *TOP. Return non-zero if
|
successful. */
|
successful. */
|
|
|
static int
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static int
|
derive_stack_segment (bfd_vma *bottom, bfd_vma *top)
|
derive_stack_segment (bfd_vma *bottom, bfd_vma *top)
|
{
|
{
|
struct frame_info *fi, *tmp_fi;
|
struct frame_info *fi, *tmp_fi;
|
|
|
gdb_assert (bottom);
|
gdb_assert (bottom);
|
gdb_assert (top);
|
gdb_assert (top);
|
|
|
/* Can't succeed without stack and registers. */
|
/* Can't succeed without stack and registers. */
|
if (!target_has_stack || !target_has_registers)
|
if (!target_has_stack || !target_has_registers)
|
return 0;
|
return 0;
|
|
|
/* Can't succeed without current frame. */
|
/* Can't succeed without current frame. */
|
fi = get_current_frame ();
|
fi = get_current_frame ();
|
if (fi == NULL)
|
if (fi == NULL)
|
return 0;
|
return 0;
|
|
|
/* Save frame pointer of TOS frame. */
|
/* Save frame pointer of TOS frame. */
|
*top = get_frame_base (fi);
|
*top = get_frame_base (fi);
|
/* If current stack pointer is more "inner", use that instead. */
|
/* If current stack pointer is more "inner", use that instead. */
|
if (gdbarch_inner_than (get_frame_arch (fi), get_frame_sp (fi), *top))
|
if (gdbarch_inner_than (get_frame_arch (fi), get_frame_sp (fi), *top))
|
*top = get_frame_sp (fi);
|
*top = get_frame_sp (fi);
|
|
|
/* Find prev-most frame. */
|
/* Find prev-most frame. */
|
while ((tmp_fi = get_prev_frame (fi)) != NULL)
|
while ((tmp_fi = get_prev_frame (fi)) != NULL)
|
fi = tmp_fi;
|
fi = tmp_fi;
|
|
|
/* Save frame pointer of prev-most frame. */
|
/* Save frame pointer of prev-most frame. */
|
*bottom = get_frame_base (fi);
|
*bottom = get_frame_base (fi);
|
|
|
/* Now canonicalize their order, so that BOTTOM is a lower address
|
/* Now canonicalize their order, so that BOTTOM is a lower address
|
(as opposed to a lower stack frame). */
|
(as opposed to a lower stack frame). */
|
if (*bottom > *top)
|
if (*bottom > *top)
|
{
|
{
|
bfd_vma tmp_vma;
|
bfd_vma tmp_vma;
|
|
|
tmp_vma = *top;
|
tmp_vma = *top;
|
*top = *bottom;
|
*top = *bottom;
|
*bottom = tmp_vma;
|
*bottom = tmp_vma;
|
}
|
}
|
|
|
return 1;
|
return 1;
|
}
|
}
|
|
|
/* call_target_sbrk --
|
/* call_target_sbrk --
|
helper function for derive_heap_segment. */
|
helper function for derive_heap_segment. */
|
|
|
static bfd_vma
|
static bfd_vma
|
call_target_sbrk (int sbrk_arg)
|
call_target_sbrk (int sbrk_arg)
|
{
|
{
|
struct objfile *sbrk_objf;
|
struct objfile *sbrk_objf;
|
struct gdbarch *gdbarch;
|
struct gdbarch *gdbarch;
|
bfd_vma top_of_heap;
|
bfd_vma top_of_heap;
|
struct value *target_sbrk_arg;
|
struct value *target_sbrk_arg;
|
struct value *sbrk_fn, *ret;
|
struct value *sbrk_fn, *ret;
|
bfd_vma tmp;
|
bfd_vma tmp;
|
|
|
if (lookup_minimal_symbol ("sbrk", NULL, NULL) != NULL)
|
if (lookup_minimal_symbol ("sbrk", NULL, NULL) != NULL)
|
{
|
{
|
sbrk_fn = find_function_in_inferior ("sbrk", &sbrk_objf);
|
sbrk_fn = find_function_in_inferior ("sbrk", &sbrk_objf);
|
if (sbrk_fn == NULL)
|
if (sbrk_fn == NULL)
|
return (bfd_vma) 0;
|
return (bfd_vma) 0;
|
}
|
}
|
else if (lookup_minimal_symbol ("_sbrk", NULL, NULL) != NULL)
|
else if (lookup_minimal_symbol ("_sbrk", NULL, NULL) != NULL)
|
{
|
{
|
sbrk_fn = find_function_in_inferior ("_sbrk", &sbrk_objf);
|
sbrk_fn = find_function_in_inferior ("_sbrk", &sbrk_objf);
|
if (sbrk_fn == NULL)
|
if (sbrk_fn == NULL)
|
return (bfd_vma) 0;
|
return (bfd_vma) 0;
|
}
|
}
|
else
|
else
|
return (bfd_vma) 0;
|
return (bfd_vma) 0;
|
|
|
gdbarch = get_objfile_arch (sbrk_objf);
|
gdbarch = get_objfile_arch (sbrk_objf);
|
target_sbrk_arg = value_from_longest (builtin_type (gdbarch)->builtin_int,
|
target_sbrk_arg = value_from_longest (builtin_type (gdbarch)->builtin_int,
|
sbrk_arg);
|
sbrk_arg);
|
gdb_assert (target_sbrk_arg);
|
gdb_assert (target_sbrk_arg);
|
ret = call_function_by_hand (sbrk_fn, 1, &target_sbrk_arg);
|
ret = call_function_by_hand (sbrk_fn, 1, &target_sbrk_arg);
|
if (ret == NULL)
|
if (ret == NULL)
|
return (bfd_vma) 0;
|
return (bfd_vma) 0;
|
|
|
tmp = value_as_long (ret);
|
tmp = value_as_long (ret);
|
if ((LONGEST) tmp <= 0 || (LONGEST) tmp == 0xffffffff)
|
if ((LONGEST) tmp <= 0 || (LONGEST) tmp == 0xffffffff)
|
return (bfd_vma) 0;
|
return (bfd_vma) 0;
|
|
|
top_of_heap = tmp;
|
top_of_heap = tmp;
|
return top_of_heap;
|
return top_of_heap;
|
}
|
}
|
|
|
/* Derive a reasonable heap segment for ABFD by looking at sbrk and
|
/* Derive a reasonable heap segment for ABFD by looking at sbrk and
|
the static data sections. Store its limits in *BOTTOM and *TOP.
|
the static data sections. Store its limits in *BOTTOM and *TOP.
|
Return non-zero if successful. */
|
Return non-zero if successful. */
|
|
|
static int
|
static int
|
derive_heap_segment (bfd *abfd, bfd_vma *bottom, bfd_vma *top)
|
derive_heap_segment (bfd *abfd, bfd_vma *bottom, bfd_vma *top)
|
{
|
{
|
struct gdbarch *gdbarch;
|
struct gdbarch *gdbarch;
|
bfd_vma top_of_data_memory = 0;
|
bfd_vma top_of_data_memory = 0;
|
bfd_vma top_of_heap = 0;
|
bfd_vma top_of_heap = 0;
|
bfd_size_type sec_size;
|
bfd_size_type sec_size;
|
bfd_vma sec_vaddr;
|
bfd_vma sec_vaddr;
|
asection *sec;
|
asection *sec;
|
|
|
gdb_assert (bottom);
|
gdb_assert (bottom);
|
gdb_assert (top);
|
gdb_assert (top);
|
|
|
/* This function depends on being able to call a function in the
|
/* This function depends on being able to call a function in the
|
inferior. */
|
inferior. */
|
if (!target_has_execution)
|
if (!target_has_execution)
|
return 0;
|
return 0;
|
|
|
/* The following code assumes that the link map is arranged as
|
/* The following code assumes that the link map is arranged as
|
follows (low to high addresses):
|
follows (low to high addresses):
|
|
|
---------------------------------
|
---------------------------------
|
| text sections |
|
| text sections |
|
---------------------------------
|
---------------------------------
|
| data sections (including bss) |
|
| data sections (including bss) |
|
---------------------------------
|
---------------------------------
|
| heap |
|
| heap |
|
--------------------------------- */
|
--------------------------------- */
|
|
|
for (sec = abfd->sections; sec; sec = sec->next)
|
for (sec = abfd->sections; sec; sec = sec->next)
|
{
|
{
|
if (bfd_get_section_flags (abfd, sec) & SEC_DATA
|
if (bfd_get_section_flags (abfd, sec) & SEC_DATA
|
|| strcmp (".bss", bfd_section_name (abfd, sec)) == 0)
|
|| strcmp (".bss", bfd_section_name (abfd, sec)) == 0)
|
{
|
{
|
sec_vaddr = bfd_get_section_vma (abfd, sec);
|
sec_vaddr = bfd_get_section_vma (abfd, sec);
|
sec_size = bfd_get_section_size (sec);
|
sec_size = bfd_get_section_size (sec);
|
if (sec_vaddr + sec_size > top_of_data_memory)
|
if (sec_vaddr + sec_size > top_of_data_memory)
|
top_of_data_memory = sec_vaddr + sec_size;
|
top_of_data_memory = sec_vaddr + sec_size;
|
}
|
}
|
}
|
}
|
|
|
top_of_heap = call_target_sbrk (0);
|
top_of_heap = call_target_sbrk (0);
|
if (top_of_heap == (bfd_vma) 0)
|
if (top_of_heap == (bfd_vma) 0)
|
return 0;
|
return 0;
|
|
|
/* Return results. */
|
/* Return results. */
|
if (top_of_heap > top_of_data_memory)
|
if (top_of_heap > top_of_data_memory)
|
{
|
{
|
*bottom = top_of_data_memory;
|
*bottom = top_of_data_memory;
|
*top = top_of_heap;
|
*top = top_of_heap;
|
return 1;
|
return 1;
|
}
|
}
|
|
|
/* No additional heap space needs to be saved. */
|
/* No additional heap space needs to be saved. */
|
return 0;
|
return 0;
|
}
|
}
|
|
|
static void
|
static void
|
make_output_phdrs (bfd *obfd, asection *osec, void *ignored)
|
make_output_phdrs (bfd *obfd, asection *osec, void *ignored)
|
{
|
{
|
int p_flags = 0;
|
int p_flags = 0;
|
int p_type = 0;
|
int p_type = 0;
|
|
|
/* FIXME: these constants may only be applicable for ELF. */
|
/* FIXME: these constants may only be applicable for ELF. */
|
if (strncmp (bfd_section_name (obfd, osec), "load", 4) == 0)
|
if (strncmp (bfd_section_name (obfd, osec), "load", 4) == 0)
|
p_type = PT_LOAD;
|
p_type = PT_LOAD;
|
else if (strncmp (bfd_section_name (obfd, osec), "note", 4) == 0)
|
else if (strncmp (bfd_section_name (obfd, osec), "note", 4) == 0)
|
p_type = PT_NOTE;
|
p_type = PT_NOTE;
|
else
|
else
|
p_type = PT_NULL;
|
p_type = PT_NULL;
|
|
|
p_flags |= PF_R; /* Segment is readable. */
|
p_flags |= PF_R; /* Segment is readable. */
|
if (!(bfd_get_section_flags (obfd, osec) & SEC_READONLY))
|
if (!(bfd_get_section_flags (obfd, osec) & SEC_READONLY))
|
p_flags |= PF_W; /* Segment is writable. */
|
p_flags |= PF_W; /* Segment is writable. */
|
if (bfd_get_section_flags (obfd, osec) & SEC_CODE)
|
if (bfd_get_section_flags (obfd, osec) & SEC_CODE)
|
p_flags |= PF_X; /* Segment is executable. */
|
p_flags |= PF_X; /* Segment is executable. */
|
|
|
bfd_record_phdr (obfd, p_type, 1, p_flags, 0, 0, 0, 0, 1, &osec);
|
bfd_record_phdr (obfd, p_type, 1, p_flags, 0, 0, 0, 0, 1, &osec);
|
}
|
}
|
|
|
static int
|
static int
|
gcore_create_callback (CORE_ADDR vaddr, unsigned long size,
|
gcore_create_callback (CORE_ADDR vaddr, unsigned long size,
|
int read, int write, int exec, void *data)
|
int read, int write, int exec, void *data)
|
{
|
{
|
bfd *obfd = data;
|
bfd *obfd = data;
|
asection *osec;
|
asection *osec;
|
flagword flags = SEC_ALLOC | SEC_HAS_CONTENTS | SEC_LOAD;
|
flagword flags = SEC_ALLOC | SEC_HAS_CONTENTS | SEC_LOAD;
|
|
|
/* If the memory segment has no permissions set, ignore it, otherwise
|
/* If the memory segment has no permissions set, ignore it, otherwise
|
when we later try to access it for read/write, we'll get an error
|
when we later try to access it for read/write, we'll get an error
|
or jam the kernel. */
|
or jam the kernel. */
|
if (read == 0 && write == 0 && exec == 0)
|
if (read == 0 && write == 0 && exec == 0)
|
{
|
{
|
if (info_verbose)
|
if (info_verbose)
|
{
|
{
|
fprintf_filtered (gdb_stdout, "Ignore segment, %s bytes at %s\n",
|
fprintf_filtered (gdb_stdout, "Ignore segment, %s bytes at %s\n",
|
plongest (size), paddress (target_gdbarch, vaddr));
|
plongest (size), paddress (target_gdbarch, vaddr));
|
}
|
}
|
|
|
return 0;
|
return 0;
|
}
|
}
|
|
|
if (write == 0 && !solib_keep_data_in_core (vaddr, size))
|
if (write == 0 && !solib_keep_data_in_core (vaddr, size))
|
{
|
{
|
/* See if this region of memory lies inside a known file on disk.
|
/* See if this region of memory lies inside a known file on disk.
|
If so, we can avoid copying its contents by clearing SEC_LOAD. */
|
If so, we can avoid copying its contents by clearing SEC_LOAD. */
|
struct objfile *objfile;
|
struct objfile *objfile;
|
struct obj_section *objsec;
|
struct obj_section *objsec;
|
|
|
ALL_OBJSECTIONS (objfile, objsec)
|
ALL_OBJSECTIONS (objfile, objsec)
|
{
|
{
|
bfd *abfd = objfile->obfd;
|
bfd *abfd = objfile->obfd;
|
asection *asec = objsec->the_bfd_section;
|
asection *asec = objsec->the_bfd_section;
|
bfd_vma align = (bfd_vma) 1 << bfd_get_section_alignment (abfd,
|
bfd_vma align = (bfd_vma) 1 << bfd_get_section_alignment (abfd,
|
asec);
|
asec);
|
bfd_vma start = obj_section_addr (objsec) & -align;
|
bfd_vma start = obj_section_addr (objsec) & -align;
|
bfd_vma end = (obj_section_endaddr (objsec) + align - 1) & -align;
|
bfd_vma end = (obj_section_endaddr (objsec) + align - 1) & -align;
|
/* Match if either the entire memory region lies inside the
|
/* Match if either the entire memory region lies inside the
|
section (i.e. a mapping covering some pages of a large
|
section (i.e. a mapping covering some pages of a large
|
segment) or the entire section lies inside the memory region
|
segment) or the entire section lies inside the memory region
|
(i.e. a mapping covering multiple small sections).
|
(i.e. a mapping covering multiple small sections).
|
|
|
This BFD was synthesized from reading target memory,
|
This BFD was synthesized from reading target memory,
|
we don't want to omit that. */
|
we don't want to omit that. */
|
if (((vaddr >= start && vaddr + size <= end)
|
if (((vaddr >= start && vaddr + size <= end)
|
|| (start >= vaddr && end <= vaddr + size))
|
|| (start >= vaddr && end <= vaddr + size))
|
&& !(bfd_get_file_flags (abfd) & BFD_IN_MEMORY))
|
&& !(bfd_get_file_flags (abfd) & BFD_IN_MEMORY))
|
{
|
{
|
flags &= ~SEC_LOAD;
|
flags &= ~SEC_LOAD;
|
flags |= SEC_NEVER_LOAD;
|
flags |= SEC_NEVER_LOAD;
|
goto keep; /* break out of two nested for loops */
|
goto keep; /* break out of two nested for loops */
|
}
|
}
|
}
|
}
|
|
|
keep:
|
keep:
|
flags |= SEC_READONLY;
|
flags |= SEC_READONLY;
|
}
|
}
|
|
|
if (exec)
|
if (exec)
|
flags |= SEC_CODE;
|
flags |= SEC_CODE;
|
else
|
else
|
flags |= SEC_DATA;
|
flags |= SEC_DATA;
|
|
|
osec = bfd_make_section_anyway_with_flags (obfd, "load", flags);
|
osec = bfd_make_section_anyway_with_flags (obfd, "load", flags);
|
if (osec == NULL)
|
if (osec == NULL)
|
{
|
{
|
warning (_("Couldn't make gcore segment: %s"),
|
warning (_("Couldn't make gcore segment: %s"),
|
bfd_errmsg (bfd_get_error ()));
|
bfd_errmsg (bfd_get_error ()));
|
return 1;
|
return 1;
|
}
|
}
|
|
|
if (info_verbose)
|
if (info_verbose)
|
{
|
{
|
fprintf_filtered (gdb_stdout, "Save segment, %s bytes at %s\n",
|
fprintf_filtered (gdb_stdout, "Save segment, %s bytes at %s\n",
|
plongest (size), paddress (target_gdbarch, vaddr));
|
plongest (size), paddress (target_gdbarch, vaddr));
|
}
|
}
|
|
|
bfd_set_section_size (obfd, osec, size);
|
bfd_set_section_size (obfd, osec, size);
|
bfd_set_section_vma (obfd, osec, vaddr);
|
bfd_set_section_vma (obfd, osec, vaddr);
|
bfd_section_lma (obfd, osec) = 0; /* ??? bfd_set_section_lma? */
|
bfd_section_lma (obfd, osec) = 0; /* ??? bfd_set_section_lma? */
|
return 0;
|
return 0;
|
}
|
}
|
|
|
static int
|
static int
|
objfile_find_memory_regions (int (*func) (CORE_ADDR, unsigned long,
|
objfile_find_memory_regions (int (*func) (CORE_ADDR, unsigned long,
|
int, int, int, void *),
|
int, int, int, void *),
|
void *obfd)
|
void *obfd)
|
{
|
{
|
/* Use objfile data to create memory sections. */
|
/* Use objfile data to create memory sections. */
|
struct objfile *objfile;
|
struct objfile *objfile;
|
struct obj_section *objsec;
|
struct obj_section *objsec;
|
bfd_vma temp_bottom, temp_top;
|
bfd_vma temp_bottom, temp_top;
|
|
|
/* Call callback function for each objfile section. */
|
/* Call callback function for each objfile section. */
|
ALL_OBJSECTIONS (objfile, objsec)
|
ALL_OBJSECTIONS (objfile, objsec)
|
{
|
{
|
bfd *ibfd = objfile->obfd;
|
bfd *ibfd = objfile->obfd;
|
asection *isec = objsec->the_bfd_section;
|
asection *isec = objsec->the_bfd_section;
|
flagword flags = bfd_get_section_flags (ibfd, isec);
|
flagword flags = bfd_get_section_flags (ibfd, isec);
|
int ret;
|
int ret;
|
|
|
if ((flags & SEC_ALLOC) || (flags & SEC_LOAD))
|
if ((flags & SEC_ALLOC) || (flags & SEC_LOAD))
|
{
|
{
|
int size = bfd_section_size (ibfd, isec);
|
int size = bfd_section_size (ibfd, isec);
|
int ret;
|
int ret;
|
|
|
ret = (*func) (obj_section_addr (objsec), bfd_section_size (ibfd, isec),
|
ret = (*func) (obj_section_addr (objsec), bfd_section_size (ibfd, isec),
|
1, /* All sections will be readable. */
|
1, /* All sections will be readable. */
|
(flags & SEC_READONLY) == 0, /* Writable. */
|
(flags & SEC_READONLY) == 0, /* Writable. */
|
(flags & SEC_CODE) != 0, /* Executable. */
|
(flags & SEC_CODE) != 0, /* Executable. */
|
obfd);
|
obfd);
|
if (ret != 0)
|
if (ret != 0)
|
return ret;
|
return ret;
|
}
|
}
|
}
|
}
|
|
|
/* Make a stack segment. */
|
/* Make a stack segment. */
|
if (derive_stack_segment (&temp_bottom, &temp_top))
|
if (derive_stack_segment (&temp_bottom, &temp_top))
|
(*func) (temp_bottom, temp_top - temp_bottom,
|
(*func) (temp_bottom, temp_top - temp_bottom,
|
1, /* Stack section will be readable. */
|
1, /* Stack section will be readable. */
|
1, /* Stack section will be writable. */
|
1, /* Stack section will be writable. */
|
0, /* Stack section will not be executable. */
|
0, /* Stack section will not be executable. */
|
obfd);
|
obfd);
|
|
|
/* Make a heap segment. */
|
/* Make a heap segment. */
|
if (derive_heap_segment (exec_bfd, &temp_bottom, &temp_top))
|
if (derive_heap_segment (exec_bfd, &temp_bottom, &temp_top))
|
(*func) (temp_bottom, temp_top - temp_bottom,
|
(*func) (temp_bottom, temp_top - temp_bottom,
|
1, /* Heap section will be readable. */
|
1, /* Heap section will be readable. */
|
1, /* Heap section will be writable. */
|
1, /* Heap section will be writable. */
|
0, /* Heap section will not be executable. */
|
0, /* Heap section will not be executable. */
|
obfd);
|
obfd);
|
|
|
return 0;
|
return 0;
|
}
|
}
|
|
|
static void
|
static void
|
gcore_copy_callback (bfd *obfd, asection *osec, void *ignored)
|
gcore_copy_callback (bfd *obfd, asection *osec, void *ignored)
|
{
|
{
|
bfd_size_type size, total_size = bfd_section_size (obfd, osec);
|
bfd_size_type size, total_size = bfd_section_size (obfd, osec);
|
file_ptr offset = 0;
|
file_ptr offset = 0;
|
struct cleanup *old_chain = NULL;
|
struct cleanup *old_chain = NULL;
|
void *memhunk;
|
void *memhunk;
|
|
|
/* Read-only sections are marked; we don't have to copy their contents. */
|
/* Read-only sections are marked; we don't have to copy their contents. */
|
if ((bfd_get_section_flags (obfd, osec) & SEC_LOAD) == 0)
|
if ((bfd_get_section_flags (obfd, osec) & SEC_LOAD) == 0)
|
return;
|
return;
|
|
|
/* Only interested in "load" sections. */
|
/* Only interested in "load" sections. */
|
if (strncmp ("load", bfd_section_name (obfd, osec), 4) != 0)
|
if (strncmp ("load", bfd_section_name (obfd, osec), 4) != 0)
|
return;
|
return;
|
|
|
size = min (total_size, MAX_COPY_BYTES);
|
size = min (total_size, MAX_COPY_BYTES);
|
memhunk = xmalloc (size);
|
memhunk = xmalloc (size);
|
old_chain = make_cleanup (xfree, memhunk);
|
old_chain = make_cleanup (xfree, memhunk);
|
|
|
while (total_size > 0)
|
while (total_size > 0)
|
{
|
{
|
if (size > total_size)
|
if (size > total_size)
|
size = total_size;
|
size = total_size;
|
|
|
if (target_read_memory (bfd_section_vma (obfd, osec) + offset,
|
if (target_read_memory (bfd_section_vma (obfd, osec) + offset,
|
memhunk, size) != 0)
|
memhunk, size) != 0)
|
{
|
{
|
warning (_("Memory read failed for corefile section, %s bytes at %s."),
|
warning (_("Memory read failed for corefile section, %s bytes at %s."),
|
plongest (size),
|
plongest (size),
|
paddress (target_gdbarch, bfd_section_vma (obfd, osec)));
|
paddress (target_gdbarch, bfd_section_vma (obfd, osec)));
|
break;
|
break;
|
}
|
}
|
if (!bfd_set_section_contents (obfd, osec, memhunk, offset, size))
|
if (!bfd_set_section_contents (obfd, osec, memhunk, offset, size))
|
{
|
{
|
warning (_("Failed to write corefile contents (%s)."),
|
warning (_("Failed to write corefile contents (%s)."),
|
bfd_errmsg (bfd_get_error ()));
|
bfd_errmsg (bfd_get_error ()));
|
break;
|
break;
|
}
|
}
|
|
|
total_size -= size;
|
total_size -= size;
|
offset += size;
|
offset += size;
|
}
|
}
|
|
|
do_cleanups (old_chain); /* Frees MEMHUNK. */
|
do_cleanups (old_chain); /* Frees MEMHUNK. */
|
}
|
}
|
|
|
static int
|
static int
|
gcore_memory_sections (bfd *obfd)
|
gcore_memory_sections (bfd *obfd)
|
{
|
{
|
if (target_find_memory_regions (gcore_create_callback, obfd) != 0)
|
if (target_find_memory_regions (gcore_create_callback, obfd) != 0)
|
return 0; /* FIXME: error return/msg? */
|
return 0; /* FIXME: error return/msg? */
|
|
|
/* Record phdrs for section-to-segment mapping. */
|
/* Record phdrs for section-to-segment mapping. */
|
bfd_map_over_sections (obfd, make_output_phdrs, NULL);
|
bfd_map_over_sections (obfd, make_output_phdrs, NULL);
|
|
|
/* Copy memory region contents. */
|
/* Copy memory region contents. */
|
bfd_map_over_sections (obfd, gcore_copy_callback, NULL);
|
bfd_map_over_sections (obfd, gcore_copy_callback, NULL);
|
|
|
return 1;
|
return 1;
|
}
|
}
|
|
|
/* Provide a prototype to silence -Wmissing-prototypes. */
|
/* Provide a prototype to silence -Wmissing-prototypes. */
|
extern initialize_file_ftype _initialize_gcore;
|
extern initialize_file_ftype _initialize_gcore;
|
|
|
void
|
void
|
_initialize_gcore (void)
|
_initialize_gcore (void)
|
{
|
{
|
add_com ("generate-core-file", class_files, gcore_command, _("\
|
add_com ("generate-core-file", class_files, gcore_command, _("\
|
Save a core file with the current state of the debugged process.\n\
|
Save a core file with the current state of the debugged process.\n\
|
Argument is optional filename. Default filename is 'core.<process_id>'."));
|
Argument is optional filename. Default filename is 'core.<process_id>'."));
|
|
|
add_com_alias ("gcore", "generate-core-file", class_files, 1);
|
add_com_alias ("gcore", "generate-core-file", class_files, 1);
|
exec_set_find_memory_regions (objfile_find_memory_regions);
|
exec_set_find_memory_regions (objfile_find_memory_regions);
|
}
|
}
|
|
|
