mirror of
https://sourceware.org/git/binutils-gdb.git
synced 2024-12-09 04:21:49 +08:00
28439f5ef7
(core_file_thread_alive): Rename to... (core_thread_alive): ... this. (core_pid_to_str): Try gdbarch_core_pid_to_str first. (init_core_ops): Adjust. (coreops_suppress_target): Delete. (_initialize_corelow): Unconditionally add core_ops. * procfs.c: Include "inf-child.h". (procfs_ops): Delete. (init_procfs_ops): Delete. Reimplement as... (procfs_target): ... this, inheriting from inf-child. (procfs_attach, procfs_detach, procfs_fetch_registers): Adjust. (procfs_prepare_to_store): Delete. (procfs_store_registers, procfs_resume): Adjust. (procfs_open): Delete. (procfs_suppress_run): Delete. (procfs_can_run): Delete. (procfs_mourn_inferior): Adjust. (procfs_init_inferior): Add target_ops parameter. Adjust. (procfs_create_inferior): Don't pass procfs_init_inferior to fork_inferior. Instead call it after fork_inferior returns. (procfs_find_new_threads): Adjust. (_initialize_procfs): Adjust to use procfs_target instead of init_procfs_ops. * sol-thread.c (orig_core_ops, sol_core_ops): Delete. (lwp_to_thread): Use target_thread_alive. (sol_thread_open): Delete. (sol_thread_attach): Delete. (sol_thread_detach, sol_thread_resume, sol_thread_wait) (sol_thread_fetch_registers, sol_thread_store_registers): Adjust to use find_target_beneath. (sol_thread_prepare_to_store, sol_thread_xfer_memory): Delete. (sol_thread_xfer_partial): Adjust to use find_target_beneath. (sol_thread_files_info, sol_thread_kill_inferior): Delete. (check_for_thread_db): New. (sol_thread_notice_signals, sol_thread_create_inferior): Delete. (sol_thread_new_objfile): Call check_for_thread_db. (sol_thread_mourn_inferior): Adjust to use find_target_beneath. (sol_thread_can_run): Delete. (sol_thread_alive): Adjust to use find_target_beneath. (sol_thread_stop): Delete. (rw_common): Use target_write_memory or target_read_memory. (ps_lgetregs, ps_lgetfpregs): Use target_fetch_registers. (ps_lsetregs, ps_lsetfpregs): Use target_store_registers. (solaris_pid_to_str): Remove check for libthread_db initialization failing. (sol_find_new_threads): Remove check for libthread_db initialization failing, or for an invalid inferior_ptid. Adjust to use find_target_beneath. (sol_core_open, sol_core_close, sol_core_detach, sol_core_files_info, sol_find_memory_regions, sol_make_note_section, ignore): Delete. (init_sol_thread_ops): Make it a thread_stratum target. Remove unneeded callback settings. (init_sol_core_ops): Delete. (_initialize_sol_thread): No longer call init_sol_core_ops, set procfs_suppress_run, or hack with core_ops. * target.h (struct target_ops): Add a target_ops * parameter to to_resume, to_fetch_registers, to_store_registers, to_thread_alive and to_find_new_threads. (target_fetch_registers, target_store_registers) (target_thread_alive, target_find_new_threads): Redeclare as function. * target.c (update_current_target): Do not inherit or de_fault to_resume, to_fetch_registers, to_store_registers, to_thread_alive, to_find_new_threads. (target_resume): Adjust. (target_thread_alive, target_find_new_threads): New. (debug_to_resume, debug_to_fetch_registers): Delete. (target_fetch_registers): New. (debug_to_store_registers): Delete. (target_store_registers): New. (debug_to_thread_alive, debug_to_find_new_threads): Delete. (setup_target_debug): Adjust. * gdbcore.h (core_ops): Delete declaration. * inf-ptrace.c, linux-nat.c, remote.c, amd64-linux-nat.c, inf-child.c, linux-thread-db.c, bsd-uthread.c, inf-ttrace.c, i386-sol2-tdep.c, darwin-nat.c, gnu-nat.c, go32-nat.c, hpux-thread.c, i386-linux-nat.c, i386fbsd-nat.c, monitor.c, nto-procfs.c, remote-m32r-sdi.c, remote-mips.c, windows-nat.c, alphabsd-nat.c, amd64bsd-nat.c, arm-linux-nat.c, armnbsd-nat.c, bsd-kvm.c, hppa-hpux-nat.c, hppa-linux-nat.c, hppabsd-nat.c, hppanbsd-nat.c, i386-darwin-nat.c, i386bsd-nat.c, ia64-linux-nat.c, m32r-linux-nat.c, m68kbsd-nat.c, m68klinux-nat.c, m88kbsd-nat.c, mips-linux-nat.c, mips64obsd-nat.c, mipsnbsd-nat.c, ppc-linux-nat.c, ppcnbsd-nat.c, ppcobsd-nat.c, remote-sim.c, rs6000-nat.c, s390-nat.c, shnbsd-nat.c, sparc-nat.c, sparc-nat.h, spu-linux-nat.c, vaxbsd-nat.c, xtensa-linux-nat.c: Adjust to target_ops changes. * gdbarch.sh (core_pid_to_str): New gdbarch callback. * gdbarch.h, gdbarch.c: Regenerate. * sol2-tdep.c: Include "inferior.h". (sol2_core_pid_to_str): New. * sol2-tdep.h (sol2_core_pid_to_str): Declare. * amd64-sol2-tdep.c (amd64_sol2_init_abi): Set it. * sparc-sol2-tdep.c (sparc32_sol2_init_abi): Set it. * sparc64-sol2-tdep.c (sparc64_sol2_init_abi): Set it. * i386-sol2-tdep.c (i386_sol2_init_abi): Set it.
755 lines
21 KiB
C
755 lines
21 KiB
C
/* Core dump and executable file functions below target vector, for GDB.
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Copyright (C) 1986, 1987, 1989, 1991, 1992, 1993, 1994, 1995, 1996, 1997,
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1998, 1999, 2000, 2001, 2003, 2004, 2005, 2006, 2007, 2008, 2009
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Free Software Foundation, Inc.
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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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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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(at your option) any later version.
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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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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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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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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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#include "defs.h"
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#include "arch-utils.h"
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#include "gdb_string.h"
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#include <errno.h>
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#include <signal.h>
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#include <fcntl.h>
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#ifdef HAVE_SYS_FILE_H
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#include <sys/file.h> /* needed for F_OK and friends */
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#endif
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#include "frame.h" /* required by inferior.h */
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#include "inferior.h"
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#include "symtab.h"
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#include "command.h"
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#include "bfd.h"
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#include "target.h"
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#include "gdbcore.h"
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#include "gdbthread.h"
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#include "regcache.h"
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#include "regset.h"
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#include "symfile.h"
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#include "exec.h"
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#include "readline/readline.h"
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#include "gdb_assert.h"
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#include "exceptions.h"
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#include "solib.h"
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#include "filenames.h"
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#ifndef O_LARGEFILE
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#define O_LARGEFILE 0
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#endif
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/* List of all available core_fns. On gdb startup, each core file
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register reader calls deprecated_add_core_fns() to register
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information on each core format it is prepared to read. */
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static struct core_fns *core_file_fns = NULL;
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/* The core_fns for a core file handler that is prepared to read the core
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file currently open on core_bfd. */
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static struct core_fns *core_vec = NULL;
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/* FIXME: kettenis/20031023: Eventually this variable should
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disappear. */
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struct gdbarch *core_gdbarch = NULL;
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static void core_files_info (struct target_ops *);
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static struct core_fns *sniff_core_bfd (bfd *);
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static int gdb_check_format (bfd *);
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static void core_open (char *, int);
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static void core_detach (struct target_ops *ops, char *, int);
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static void core_close (int);
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static void core_close_cleanup (void *ignore);
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static void add_to_thread_list (bfd *, asection *, void *);
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static void init_core_ops (void);
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void _initialize_corelow (void);
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struct target_ops core_ops;
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/* An arbitrary identifier for the core inferior. */
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#define CORELOW_PID 1
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/* Link a new core_fns into the global core_file_fns list. Called on gdb
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startup by the _initialize routine in each core file register reader, to
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register information about each format the the reader is prepared to
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handle. */
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void
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deprecated_add_core_fns (struct core_fns *cf)
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{
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cf->next = core_file_fns;
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core_file_fns = cf;
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}
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/* The default function that core file handlers can use to examine a
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core file BFD and decide whether or not to accept the job of
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reading the core file. */
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int
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default_core_sniffer (struct core_fns *our_fns, bfd *abfd)
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{
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int result;
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result = (bfd_get_flavour (abfd) == our_fns -> core_flavour);
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return (result);
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}
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/* Walk through the list of core functions to find a set that can
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handle the core file open on ABFD. Default to the first one in the
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list if nothing matches. Returns pointer to set that is
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selected. */
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static struct core_fns *
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sniff_core_bfd (bfd *abfd)
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{
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struct core_fns *cf;
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struct core_fns *yummy = NULL;
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int matches = 0;;
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/* Don't sniff if we have support for register sets in CORE_GDBARCH. */
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if (core_gdbarch && gdbarch_regset_from_core_section_p (core_gdbarch))
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return NULL;
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for (cf = core_file_fns; cf != NULL; cf = cf->next)
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{
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if (cf->core_sniffer (cf, abfd))
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{
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yummy = cf;
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matches++;
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}
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}
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if (matches > 1)
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{
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warning (_("\"%s\": ambiguous core format, %d handlers match"),
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bfd_get_filename (abfd), matches);
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}
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else if (matches == 0)
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{
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warning (_("\"%s\": no core file handler recognizes format, using default"),
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bfd_get_filename (abfd));
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}
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if (yummy == NULL)
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{
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yummy = core_file_fns;
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}
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return (yummy);
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}
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/* The default is to reject every core file format we see. Either
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BFD has to recognize it, or we have to provide a function in the
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core file handler that recognizes it. */
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int
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default_check_format (bfd *abfd)
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{
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return (0);
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}
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/* Attempt to recognize core file formats that BFD rejects. */
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static int
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gdb_check_format (bfd *abfd)
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{
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struct core_fns *cf;
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for (cf = core_file_fns; cf != NULL; cf = cf->next)
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{
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if (cf->check_format (abfd))
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{
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return (1);
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}
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}
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return (0);
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}
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/* Discard all vestiges of any previous core file and mark data and stack
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spaces as empty. */
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static void
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core_close (int quitting)
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{
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char *name;
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if (core_bfd)
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{
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int pid = ptid_get_pid (inferior_ptid);
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inferior_ptid = null_ptid; /* Avoid confusion from thread stuff */
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delete_inferior_silent (pid);
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/* Clear out solib state while the bfd is still open. See
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comments in clear_solib in solib.c. */
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clear_solib ();
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name = bfd_get_filename (core_bfd);
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if (!bfd_close (core_bfd))
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warning (_("cannot close \"%s\": %s"),
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name, bfd_errmsg (bfd_get_error ()));
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xfree (name);
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core_bfd = NULL;
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if (core_ops.to_sections)
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{
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xfree (core_ops.to_sections);
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core_ops.to_sections = NULL;
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core_ops.to_sections_end = NULL;
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}
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}
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core_vec = NULL;
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core_gdbarch = NULL;
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}
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static void
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core_close_cleanup (void *ignore)
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{
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core_close (0/*ignored*/);
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}
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/* Look for sections whose names start with `.reg/' so that we can extract the
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list of threads in a core file. */
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static void
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add_to_thread_list (bfd *abfd, asection *asect, void *reg_sect_arg)
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{
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ptid_t ptid;
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int thread_id;
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asection *reg_sect = (asection *) reg_sect_arg;
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if (strncmp (bfd_section_name (abfd, asect), ".reg/", 5) != 0)
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return;
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thread_id = atoi (bfd_section_name (abfd, asect) + 5);
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if (core_gdbarch
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&& gdbarch_core_reg_section_encodes_pid (core_gdbarch))
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{
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uint32_t merged_pid = thread_id;
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ptid = ptid_build (merged_pid & 0xffff,
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merged_pid >> 16, 0);
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}
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else
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ptid = ptid_build (ptid_get_pid (inferior_ptid), thread_id, 0);
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if (ptid_get_lwp (inferior_ptid) == 0)
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/* The main thread has already been added before getting here, and
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this is the first time we hear about a thread id. Assume this
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is the main thread. */
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thread_change_ptid (inferior_ptid, ptid);
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else
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/* Nope, really a new thread. */
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add_thread (ptid);
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/* Warning, Will Robinson, looking at BFD private data! */
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if (reg_sect != NULL
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&& asect->filepos == reg_sect->filepos) /* Did we find .reg? */
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inferior_ptid = ptid; /* Yes, make it current */
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}
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/* This routine opens and sets up the core file bfd. */
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static void
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core_open (char *filename, int from_tty)
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{
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const char *p;
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int siggy;
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struct cleanup *old_chain;
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char *temp;
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bfd *temp_bfd;
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int scratch_chan;
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int flags;
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int corelow_pid = CORELOW_PID;
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target_preopen (from_tty);
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if (!filename)
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{
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if (core_bfd)
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error (_("No core file specified. (Use `detach' to stop debugging a core file.)"));
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else
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error (_("No core file specified."));
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}
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filename = tilde_expand (filename);
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if (!IS_ABSOLUTE_PATH(filename))
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{
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temp = concat (current_directory, "/", filename, (char *)NULL);
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xfree (filename);
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filename = temp;
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}
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old_chain = make_cleanup (xfree, filename);
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flags = O_BINARY | O_LARGEFILE;
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if (write_files)
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flags |= O_RDWR;
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else
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flags |= O_RDONLY;
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scratch_chan = open (filename, flags, 0);
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if (scratch_chan < 0)
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perror_with_name (filename);
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temp_bfd = bfd_fopen (filename, gnutarget,
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write_files ? FOPEN_RUB : FOPEN_RB,
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scratch_chan);
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if (temp_bfd == NULL)
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perror_with_name (filename);
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if (!bfd_check_format (temp_bfd, bfd_core) &&
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!gdb_check_format (temp_bfd))
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{
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/* Do it after the err msg */
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/* FIXME: should be checking for errors from bfd_close (for one thing,
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on error it does not free all the storage associated with the
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bfd). */
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make_cleanup_bfd_close (temp_bfd);
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error (_("\"%s\" is not a core dump: %s"),
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filename, bfd_errmsg (bfd_get_error ()));
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}
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/* Looks semi-reasonable. Toss the old core file and work on the new. */
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discard_cleanups (old_chain); /* Don't free filename any more */
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unpush_target (&core_ops);
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core_bfd = temp_bfd;
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old_chain = make_cleanup (core_close_cleanup, 0 /*ignore*/);
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/* FIXME: kettenis/20031023: This is very dangerous. The
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CORE_GDBARCH that results from this call may very well be
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different from CURRENT_GDBARCH. However, its methods may only
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work if it is selected as the current architecture, because they
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rely on swapped data (see gdbarch.c). We should get rid of that
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swapped data. */
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core_gdbarch = gdbarch_from_bfd (core_bfd);
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/* Find a suitable core file handler to munch on core_bfd */
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core_vec = sniff_core_bfd (core_bfd);
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validate_files ();
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/* Find the data section */
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if (build_section_table (core_bfd, &core_ops.to_sections,
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&core_ops.to_sections_end))
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error (_("\"%s\": Can't find sections: %s"),
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bfd_get_filename (core_bfd), bfd_errmsg (bfd_get_error ()));
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/* If we have no exec file, try to set the architecture from the
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core file. We don't do this unconditionally since an exec file
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typically contains more information that helps us determine the
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architecture than a core file. */
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if (!exec_bfd)
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set_gdbarch_from_file (core_bfd);
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push_target (&core_ops);
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discard_cleanups (old_chain);
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add_inferior_silent (corelow_pid);
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/* Do this before acknowledging the inferior, so if
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post_create_inferior throws (can happen easilly if you're loading
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a core file with the wrong exec), we aren't left with threads
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from the previous inferior. */
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init_thread_list ();
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/* Set INFERIOR_PTID early, so an upper layer can rely on it being
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set while in the target_find_new_threads call below. */
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inferior_ptid = pid_to_ptid (corelow_pid);
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/* Assume ST --- Add a main task. We'll later detect when we go
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from ST to MT. */
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add_thread_silent (inferior_ptid);
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/* Build up thread list from BFD sections, and possibly set the
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current thread to the .reg/NN section matching the .reg
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section. */
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bfd_map_over_sections (core_bfd, add_to_thread_list,
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bfd_get_section_by_name (core_bfd, ".reg"));
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post_create_inferior (&core_ops, from_tty);
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/* Now go through the target stack looking for threads since there
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may be a thread_stratum target loaded on top of target core by
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now. The layer above should claim threads found in the BFD
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sections. */
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target_find_new_threads ();
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p = bfd_core_file_failing_command (core_bfd);
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if (p)
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printf_filtered (_("Core was generated by `%s'.\n"), p);
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siggy = bfd_core_file_failing_signal (core_bfd);
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if (siggy > 0)
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/* NOTE: target_signal_from_host() converts a target signal value
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into gdb's internal signal value. Unfortunately gdb's internal
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value is called ``target_signal'' and this function got the
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name ..._from_host(). */
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printf_filtered (_("Program terminated with signal %d, %s.\n"), siggy,
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target_signal_to_string (
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gdbarch_target_signal_from_host (core_gdbarch, siggy)));
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/* Fetch all registers from core file. */
|
||
target_fetch_registers (get_current_regcache (), -1);
|
||
|
||
/* Now, set up the frame cache, and print the top of stack. */
|
||
reinit_frame_cache ();
|
||
print_stack_frame (get_selected_frame (NULL), 1, SRC_AND_LOC);
|
||
}
|
||
|
||
static void
|
||
core_detach (struct target_ops *ops, char *args, int from_tty)
|
||
{
|
||
if (args)
|
||
error (_("Too many arguments"));
|
||
unpush_target (ops);
|
||
reinit_frame_cache ();
|
||
if (from_tty)
|
||
printf_filtered (_("No core file now.\n"));
|
||
}
|
||
|
||
|
||
/* Try to retrieve registers from a section in core_bfd, and supply
|
||
them to core_vec->core_read_registers, as the register set numbered
|
||
WHICH.
|
||
|
||
If inferior_ptid's lwp member is zero, do the single-threaded
|
||
thing: look for a section named NAME. If inferior_ptid's lwp
|
||
member is non-zero, do the multi-threaded thing: look for a section
|
||
named "NAME/LWP", where LWP is the shortest ASCII decimal
|
||
representation of inferior_ptid's lwp member.
|
||
|
||
HUMAN_NAME is a human-readable name for the kind of registers the
|
||
NAME section contains, for use in error messages.
|
||
|
||
If REQUIRED is non-zero, print an error if the core file doesn't
|
||
have a section by the appropriate name. Otherwise, just do nothing. */
|
||
|
||
static void
|
||
get_core_register_section (struct regcache *regcache,
|
||
char *name,
|
||
int which,
|
||
char *human_name,
|
||
int required)
|
||
{
|
||
static char *section_name = NULL;
|
||
struct bfd_section *section;
|
||
bfd_size_type size;
|
||
char *contents;
|
||
|
||
xfree (section_name);
|
||
|
||
if (core_gdbarch
|
||
&& gdbarch_core_reg_section_encodes_pid (core_gdbarch))
|
||
{
|
||
uint32_t merged_pid;
|
||
|
||
merged_pid = ptid_get_lwp (inferior_ptid);
|
||
merged_pid = merged_pid << 16 | ptid_get_pid (inferior_ptid);
|
||
|
||
section_name = xstrprintf ("%s/%s", name, plongest (merged_pid));
|
||
}
|
||
else if (ptid_get_lwp (inferior_ptid))
|
||
section_name = xstrprintf ("%s/%ld", name, ptid_get_lwp (inferior_ptid));
|
||
else
|
||
section_name = xstrdup (name);
|
||
|
||
section = bfd_get_section_by_name (core_bfd, section_name);
|
||
if (! section)
|
||
{
|
||
if (required)
|
||
warning (_("Couldn't find %s registers in core file."), human_name);
|
||
return;
|
||
}
|
||
|
||
size = bfd_section_size (core_bfd, section);
|
||
contents = alloca (size);
|
||
if (! bfd_get_section_contents (core_bfd, section, contents,
|
||
(file_ptr) 0, size))
|
||
{
|
||
warning (_("Couldn't read %s registers from `%s' section in core file."),
|
||
human_name, name);
|
||
return;
|
||
}
|
||
|
||
if (core_gdbarch && gdbarch_regset_from_core_section_p (core_gdbarch))
|
||
{
|
||
const struct regset *regset;
|
||
|
||
regset = gdbarch_regset_from_core_section (core_gdbarch, name, size);
|
||
if (regset == NULL)
|
||
{
|
||
if (required)
|
||
warning (_("Couldn't recognize %s registers in core file."),
|
||
human_name);
|
||
return;
|
||
}
|
||
|
||
regset->supply_regset (regset, regcache, -1, contents, size);
|
||
return;
|
||
}
|
||
|
||
gdb_assert (core_vec);
|
||
core_vec->core_read_registers (regcache, contents, size, which,
|
||
((CORE_ADDR)
|
||
bfd_section_vma (core_bfd, section)));
|
||
}
|
||
|
||
|
||
/* Get the registers out of a core file. This is the machine-
|
||
independent part. Fetch_core_registers is the machine-dependent
|
||
part, typically implemented in the xm-file for each architecture. */
|
||
|
||
/* We just get all the registers, so we don't use regno. */
|
||
|
||
static void
|
||
get_core_registers (struct target_ops *ops,
|
||
struct regcache *regcache, int regno)
|
||
{
|
||
int i;
|
||
|
||
if (!(core_gdbarch && gdbarch_regset_from_core_section_p (core_gdbarch))
|
||
&& (core_vec == NULL || core_vec->core_read_registers == NULL))
|
||
{
|
||
fprintf_filtered (gdb_stderr,
|
||
"Can't fetch registers from this type of core file\n");
|
||
return;
|
||
}
|
||
|
||
get_core_register_section (regcache,
|
||
".reg", 0, "general-purpose", 1);
|
||
get_core_register_section (regcache,
|
||
".reg2", 2, "floating-point", 0);
|
||
get_core_register_section (regcache,
|
||
".reg-xfp", 3, "extended floating-point", 0);
|
||
get_core_register_section (regcache,
|
||
".reg-ppc-vmx", 3, "ppc Altivec", 0);
|
||
get_core_register_section (regcache,
|
||
".reg-ppc-vsx", 4, "POWER7 VSX", 0);
|
||
|
||
/* Supply dummy value for all registers not found in the core. */
|
||
for (i = 0; i < gdbarch_num_regs (get_regcache_arch (regcache)); i++)
|
||
if (!regcache_valid_p (regcache, i))
|
||
regcache_raw_supply (regcache, i, NULL);
|
||
}
|
||
|
||
static void
|
||
core_files_info (struct target_ops *t)
|
||
{
|
||
print_section_info (t, core_bfd);
|
||
}
|
||
|
||
static LONGEST
|
||
core_xfer_partial (struct target_ops *ops, enum target_object object,
|
||
const char *annex, gdb_byte *readbuf,
|
||
const gdb_byte *writebuf, ULONGEST offset, LONGEST len)
|
||
{
|
||
switch (object)
|
||
{
|
||
case TARGET_OBJECT_MEMORY:
|
||
if (readbuf)
|
||
return (*ops->deprecated_xfer_memory) (offset, readbuf,
|
||
len, 0/*read*/, NULL, ops);
|
||
if (writebuf)
|
||
return (*ops->deprecated_xfer_memory) (offset, (gdb_byte *) writebuf,
|
||
len, 1/*write*/, NULL, ops);
|
||
return -1;
|
||
|
||
case TARGET_OBJECT_AUXV:
|
||
if (readbuf)
|
||
{
|
||
/* When the aux vector is stored in core file, BFD
|
||
represents this with a fake section called ".auxv". */
|
||
|
||
struct bfd_section *section;
|
||
bfd_size_type size;
|
||
char *contents;
|
||
|
||
section = bfd_get_section_by_name (core_bfd, ".auxv");
|
||
if (section == NULL)
|
||
return -1;
|
||
|
||
size = bfd_section_size (core_bfd, section);
|
||
if (offset >= size)
|
||
return 0;
|
||
size -= offset;
|
||
if (size > len)
|
||
size = len;
|
||
if (size > 0
|
||
&& !bfd_get_section_contents (core_bfd, section, readbuf,
|
||
(file_ptr) offset, size))
|
||
{
|
||
warning (_("Couldn't read NT_AUXV note in core file."));
|
||
return -1;
|
||
}
|
||
|
||
return size;
|
||
}
|
||
return -1;
|
||
|
||
case TARGET_OBJECT_WCOOKIE:
|
||
if (readbuf)
|
||
{
|
||
/* When the StackGhost cookie is stored in core file, BFD
|
||
represents this with a fake section called ".wcookie". */
|
||
|
||
struct bfd_section *section;
|
||
bfd_size_type size;
|
||
char *contents;
|
||
|
||
section = bfd_get_section_by_name (core_bfd, ".wcookie");
|
||
if (section == NULL)
|
||
return -1;
|
||
|
||
size = bfd_section_size (core_bfd, section);
|
||
if (offset >= size)
|
||
return 0;
|
||
size -= offset;
|
||
if (size > len)
|
||
size = len;
|
||
if (size > 0
|
||
&& !bfd_get_section_contents (core_bfd, section, readbuf,
|
||
(file_ptr) offset, size))
|
||
{
|
||
warning (_("Couldn't read StackGhost cookie in core file."));
|
||
return -1;
|
||
}
|
||
|
||
return size;
|
||
}
|
||
return -1;
|
||
|
||
case TARGET_OBJECT_LIBRARIES:
|
||
if (core_gdbarch
|
||
&& gdbarch_core_xfer_shared_libraries_p (core_gdbarch))
|
||
{
|
||
if (writebuf)
|
||
return -1;
|
||
return
|
||
gdbarch_core_xfer_shared_libraries (core_gdbarch,
|
||
readbuf, offset, len);
|
||
}
|
||
/* FALL THROUGH */
|
||
|
||
default:
|
||
if (ops->beneath != NULL)
|
||
return ops->beneath->to_xfer_partial (ops->beneath, object, annex,
|
||
readbuf, writebuf, offset, len);
|
||
return -1;
|
||
}
|
||
}
|
||
|
||
|
||
/* If mourn is being called in all the right places, this could be say
|
||
`gdb internal error' (since generic_mourn calls breakpoint_init_inferior). */
|
||
|
||
static int
|
||
ignore (struct bp_target_info *bp_tgt)
|
||
{
|
||
return 0;
|
||
}
|
||
|
||
|
||
/* Okay, let's be honest: threads gleaned from a core file aren't
|
||
exactly lively, are they? On the other hand, if we don't claim
|
||
that each & every one is alive, then we don't get any of them
|
||
to appear in an "info thread" command, which is quite a useful
|
||
behaviour.
|
||
*/
|
||
static int
|
||
core_thread_alive (struct target_ops *ops, ptid_t ptid)
|
||
{
|
||
return 1;
|
||
}
|
||
|
||
/* Ask the current architecture what it knows about this core file.
|
||
That will be used, in turn, to pick a better architecture. This
|
||
wrapper could be avoided if targets got a chance to specialize
|
||
core_ops. */
|
||
|
||
static const struct target_desc *
|
||
core_read_description (struct target_ops *target)
|
||
{
|
||
if (gdbarch_core_read_description_p (current_gdbarch))
|
||
return gdbarch_core_read_description (current_gdbarch, target, core_bfd);
|
||
|
||
return NULL;
|
||
}
|
||
|
||
static char *
|
||
core_pid_to_str (struct target_ops *ops, ptid_t ptid)
|
||
{
|
||
static char buf[64];
|
||
|
||
if (core_gdbarch
|
||
&& gdbarch_core_pid_to_str_p (core_gdbarch))
|
||
{
|
||
char *ret = gdbarch_core_pid_to_str (core_gdbarch, ptid);
|
||
if (ret != NULL)
|
||
return ret;
|
||
}
|
||
|
||
if (ptid_get_lwp (ptid) == 0)
|
||
xsnprintf (buf, sizeof buf, "<main task>");
|
||
else
|
||
xsnprintf (buf, sizeof buf, "Thread %ld", ptid_get_lwp (ptid));
|
||
|
||
return buf;
|
||
}
|
||
|
||
/* Fill in core_ops with its defined operations and properties. */
|
||
|
||
static void
|
||
init_core_ops (void)
|
||
{
|
||
core_ops.to_shortname = "core";
|
||
core_ops.to_longname = "Local core dump file";
|
||
core_ops.to_doc =
|
||
"Use a core file as a target. Specify the filename of the core file.";
|
||
core_ops.to_open = core_open;
|
||
core_ops.to_close = core_close;
|
||
core_ops.to_attach = find_default_attach;
|
||
core_ops.to_detach = core_detach;
|
||
core_ops.to_fetch_registers = get_core_registers;
|
||
core_ops.to_xfer_partial = core_xfer_partial;
|
||
core_ops.deprecated_xfer_memory = xfer_memory;
|
||
core_ops.to_files_info = core_files_info;
|
||
core_ops.to_insert_breakpoint = ignore;
|
||
core_ops.to_remove_breakpoint = ignore;
|
||
core_ops.to_create_inferior = find_default_create_inferior;
|
||
core_ops.to_thread_alive = core_thread_alive;
|
||
core_ops.to_read_description = core_read_description;
|
||
core_ops.to_pid_to_str = core_pid_to_str;
|
||
core_ops.to_stratum = core_stratum;
|
||
core_ops.to_has_memory = 1;
|
||
core_ops.to_has_stack = 1;
|
||
core_ops.to_has_registers = 1;
|
||
core_ops.to_magic = OPS_MAGIC;
|
||
}
|
||
|
||
void
|
||
_initialize_corelow (void)
|
||
{
|
||
init_core_ops ();
|
||
|
||
add_target (&core_ops);
|
||
}
|