/* Core dump and executable file functions below target vector, for GDB.
- Copyright 1986, 87, 89, 91, 92, 93, 94, 95, 96, 97, 1998
- Free Software Foundation, Inc.
-This file is part of GDB.
+ Copyright (C) 1986-2014 Free Software Foundation, Inc.
-This program is free software; you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation; either version 2 of the License, or
-(at your option) any later version.
+ This file is part of GDB.
-This program is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-GNU General Public License for more details.
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 3 of the License, or
+ (at your option) any later version.
-You should have received a copy of the GNU General Public License
-along with this program; if not, write to the Free Software
-Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>. */
#include "defs.h"
-#include "gdb_string.h"
+#include "arch-utils.h"
+#include <string.h>
#include <errno.h>
#include <signal.h>
#include <fcntl.h>
-#include "frame.h" /* required by inferior.h */
+#ifdef HAVE_SYS_FILE_H
+#include <sys/file.h> /* needed for F_OK and friends */
+#endif
+#include "frame.h" /* required by inferior.h */
#include "inferior.h"
#include "symtab.h"
#include "command.h"
#include "target.h"
#include "gdbcore.h"
#include "gdbthread.h"
+#include "regcache.h"
+#include "regset.h"
+#include "symfile.h"
+#include "exec.h"
+#include "readline/readline.h"
+#include "gdb_assert.h"
+#include "exceptions.h"
+#include "solib.h"
+#include "filenames.h"
+#include "progspace.h"
+#include "objfiles.h"
+#include "gdb_bfd.h"
+#include "completer.h"
+#include "filestuff.h"
+
+#ifndef O_LARGEFILE
+#define O_LARGEFILE 0
+#endif
-/* List of all available core_fns. On gdb startup, each core file register
- reader calls add_core_fns() to register information on each core format it
- is prepared to read. */
+/* List of all available core_fns. On gdb startup, each core file
+ register reader calls deprecated_add_core_fns() to register
+ information on each core format it is prepared to read. */
static struct core_fns *core_file_fns = NULL;
-static void core_files_info PARAMS ((struct target_ops *));
+/* The core_fns for a core file handler that is prepared to read the
+ core file currently open on core_bfd. */
-#ifdef SOLIB_ADD
-static int solib_add_stub PARAMS ((char *));
-#endif
+static struct core_fns *core_vec = NULL;
+
+/* FIXME: kettenis/20031023: Eventually this variable should
+ disappear. */
+
+static struct gdbarch *core_gdbarch = NULL;
+
+/* Per-core data. Currently, only the section table. Note that these
+ target sections are *not* mapped in the current address spaces' set
+ of target sections --- those should come only from pure executable
+ or shared library bfds. The core bfd sections are an
+ implementation detail of the core target, just like ptrace is for
+ unix child targets. */
+static struct target_section_table *core_data;
-static void core_open PARAMS ((char *, int));
+static void core_files_info (struct target_ops *);
-static void core_detach PARAMS ((char *, int));
+static struct core_fns *sniff_core_bfd (bfd *);
-static void core_close PARAMS ((int));
+static int gdb_check_format (bfd *);
-static void get_core_registers PARAMS ((int));
+static void core_open (char *, int);
-static void add_to_thread_list PARAMS ((bfd *, asection *, PTR));
+static void core_close (struct target_ops *self);
-static int ignore PARAMS ((CORE_ADDR, char *));
+static void core_close_cleanup (void *ignore);
-/* Link a new core_fns into the global core_file_fns list. Called on gdb
- startup by the _initialize routine in each core file register reader, to
- register information about each format the the reader is prepared to
- handle. */
+static void add_to_thread_list (bfd *, asection *, void *);
+
+static void init_core_ops (void);
+
+void _initialize_corelow (void);
+
+static struct target_ops core_ops;
+
+/* An arbitrary identifier for the core inferior. */
+#define CORELOW_PID 1
+
+/* Link a new core_fns into the global core_file_fns list. Called on
+ gdb startup by the _initialize routine in each core file register
+ reader, to register information about each format the reader is
+ prepared to handle. */
void
-add_core_fns (cf)
- struct core_fns *cf;
+deprecated_add_core_fns (struct core_fns *cf)
{
- cf -> next = core_file_fns;
+ cf->next = core_file_fns;
core_file_fns = cf;
}
+/* The default function that core file handlers can use to examine a
+ core file BFD and decide whether or not to accept the job of
+ reading the core file. */
-/* Discard all vestiges of any previous core file and mark data and stack
- spaces as empty. */
+int
+default_core_sniffer (struct core_fns *our_fns, bfd *abfd)
+{
+ int result;
-/* ARGSUSED */
-static void
-core_close (quitting)
- int quitting;
+ result = (bfd_get_flavour (abfd) == our_fns -> core_flavour);
+ return (result);
+}
+
+/* Walk through the list of core functions to find a set that can
+ handle the core file open on ABFD. Returns pointer to set that is
+ selected. */
+
+static struct core_fns *
+sniff_core_bfd (bfd *abfd)
{
- char *name;
+ struct core_fns *cf;
+ struct core_fns *yummy = NULL;
+ int matches = 0;;
- if (core_bfd)
+ /* Don't sniff if we have support for register sets in
+ CORE_GDBARCH. */
+ if (core_gdbarch && gdbarch_regset_from_core_section_p (core_gdbarch))
+ return NULL;
+
+ for (cf = core_file_fns; cf != NULL; cf = cf->next)
{
- inferior_pid = 0; /* Avoid confusion from thread stuff */
+ if (cf->core_sniffer (cf, abfd))
+ {
+ yummy = cf;
+ matches++;
+ }
+ }
+ if (matches > 1)
+ {
+ warning (_("\"%s\": ambiguous core format, %d handlers match"),
+ bfd_get_filename (abfd), matches);
+ }
+ else if (matches == 0)
+ error (_("\"%s\": no core file handler recognizes format"),
+ bfd_get_filename (abfd));
- name = bfd_get_filename (core_bfd);
- if (!bfd_close (core_bfd))
- warning ("cannot close \"%s\": %s",
- name, bfd_errmsg (bfd_get_error ()));
- free (name);
- core_bfd = NULL;
-#ifdef CLEAR_SOLIB
- CLEAR_SOLIB ();
-#endif
- if (core_ops.to_sections)
+ return (yummy);
+}
+
+/* The default is to reject every core file format we see. Either
+ BFD has to recognize it, or we have to provide a function in the
+ core file handler that recognizes it. */
+
+int
+default_check_format (bfd *abfd)
+{
+ return (0);
+}
+
+/* Attempt to recognize core file formats that BFD rejects. */
+
+static int
+gdb_check_format (bfd *abfd)
+{
+ struct core_fns *cf;
+
+ for (cf = core_file_fns; cf != NULL; cf = cf->next)
+ {
+ if (cf->check_format (abfd))
{
- free ((PTR)core_ops.to_sections);
- core_ops.to_sections = NULL;
- core_ops.to_sections_end = NULL;
+ return (1);
}
}
+ return (0);
}
-#ifdef SOLIB_ADD
-/* Stub function for catch_errors around shared library hacking. FROM_TTYP
- is really an int * which points to from_tty. */
+/* Discard all vestiges of any previous core file and mark data and
+ stack spaces as empty. */
-static int
-solib_add_stub (from_ttyp)
- char *from_ttyp;
+static void
+core_close (struct target_ops *self)
{
- SOLIB_ADD (NULL, *(int *)from_ttyp, ¤t_target);
- re_enable_breakpoints_in_shlibs ();
- return 0;
+ if (core_bfd)
+ {
+ int pid = ptid_get_pid (inferior_ptid);
+ inferior_ptid = null_ptid; /* Avoid confusion from thread
+ stuff. */
+ if (pid != 0)
+ exit_inferior_silent (pid);
+
+ /* Clear out solib state while the bfd is still open. See
+ comments in clear_solib in solib.c. */
+ clear_solib ();
+
+ if (core_data)
+ {
+ xfree (core_data->sections);
+ xfree (core_data);
+ core_data = NULL;
+ }
+
+ gdb_bfd_unref (core_bfd);
+ core_bfd = NULL;
+ }
+ core_vec = NULL;
+ core_gdbarch = NULL;
}
-#endif /* SOLIB_ADD */
-/* Look for sections whose names start with `.reg/' so that we can extract the
- list of threads in a core file. */
+static void
+core_close_cleanup (void *ignore)
+{
+ core_close (NULL);
+}
+
+/* Look for sections whose names start with `.reg/' so that we can
+ extract the list of threads in a core file. */
static void
-add_to_thread_list (abfd, asect, reg_sect_arg)
- bfd *abfd;
- asection *asect;
- PTR reg_sect_arg;
+add_to_thread_list (bfd *abfd, asection *asect, void *reg_sect_arg)
{
- int thread_id;
+ ptid_t ptid;
+ int core_tid;
+ int pid, lwpid;
asection *reg_sect = (asection *) reg_sect_arg;
+ int fake_pid_p = 0;
+ struct inferior *inf;
if (strncmp (bfd_section_name (abfd, asect), ".reg/", 5) != 0)
return;
- thread_id = atoi (bfd_section_name (abfd, asect) + 5);
+ core_tid = atoi (bfd_section_name (abfd, asect) + 5);
- add_thread (thread_id);
+ pid = bfd_core_file_pid (core_bfd);
+ if (pid == 0)
+ {
+ fake_pid_p = 1;
+ pid = CORELOW_PID;
+ }
+
+ lwpid = core_tid;
+
+ inf = current_inferior ();
+ if (inf->pid == 0)
+ {
+ inferior_appeared (inf, pid);
+ inf->fake_pid_p = fake_pid_p;
+ }
+
+ ptid = ptid_build (pid, lwpid, 0);
+
+ add_thread (ptid);
/* Warning, Will Robinson, looking at BFD private data! */
if (reg_sect != NULL
- && asect->filepos == reg_sect->filepos) /* Did we find .reg? */
- inferior_pid = thread_id; /* Yes, make it current */
+ && asect->filepos == reg_sect->filepos) /* Did we find .reg? */
+ inferior_ptid = ptid; /* Yes, make it current. */
}
/* This routine opens and sets up the core file bfd. */
static void
-core_open (filename, from_tty)
- char *filename;
- int from_tty;
+core_open (char *filename, int from_tty)
{
const char *p;
int siggy;
struct cleanup *old_chain;
char *temp;
bfd *temp_bfd;
- int ontop;
int scratch_chan;
+ int flags;
+ volatile struct gdb_exception except;
target_preopen (from_tty);
if (!filename)
{
- error (core_bfd ?
- "No core file specified. (Use `detach' to stop debugging a core file.)"
- : "No core file specified.");
+ if (core_bfd)
+ error (_("No core file specified. (Use `detach' "
+ "to stop debugging a core file.)"));
+ else
+ error (_("No core file specified."));
}
filename = tilde_expand (filename);
- if (filename[0] != '/')
+ if (!IS_ABSOLUTE_PATH (filename))
{
- temp = concat (current_directory, "/", filename, NULL);
- free (filename);
+ temp = concat (current_directory, "/",
+ filename, (char *) NULL);
+ xfree (filename);
filename = temp;
}
- old_chain = make_cleanup (free, filename);
+ old_chain = make_cleanup (xfree, filename);
- scratch_chan = open (filename, write_files ? O_RDWR : O_RDONLY, 0);
+ flags = O_BINARY | O_LARGEFILE;
+ if (write_files)
+ flags |= O_RDWR;
+ else
+ flags |= O_RDONLY;
+ scratch_chan = gdb_open_cloexec (filename, flags, 0);
if (scratch_chan < 0)
perror_with_name (filename);
- temp_bfd = bfd_fdopenr (filename, gnutarget, scratch_chan);
+ temp_bfd = gdb_bfd_fopen (filename, gnutarget,
+ write_files ? FOPEN_RUB : FOPEN_RB,
+ scratch_chan);
if (temp_bfd == NULL)
perror_with_name (filename);
- if (!bfd_check_format (temp_bfd, bfd_core))
+ if (!bfd_check_format (temp_bfd, bfd_core)
+ && !gdb_check_format (temp_bfd))
{
/* Do it after the err msg */
- /* FIXME: should be checking for errors from bfd_close (for one thing,
- on error it does not free all the storage associated with the
- bfd). */
- make_cleanup ((make_cleanup_func) bfd_close, temp_bfd);
- error ("\"%s\" is not a core dump: %s",
+ /* FIXME: should be checking for errors from bfd_close (for one
+ thing, on error it does not free all the storage associated
+ with the bfd). */
+ make_cleanup_bfd_unref (temp_bfd);
+ error (_("\"%s\" is not a core dump: %s"),
filename, bfd_errmsg (bfd_get_error ()));
}
- /* Looks semi-reasonable. Toss the old core file and work on the new. */
+ /* Looks semi-reasonable. Toss the old core file and work on the
+ new. */
- discard_cleanups (old_chain); /* Don't free filename any more */
+ do_cleanups (old_chain);
unpush_target (&core_ops);
core_bfd = temp_bfd;
- old_chain = make_cleanup ((make_cleanup_func) core_close, core_bfd);
+ old_chain = make_cleanup (core_close_cleanup, 0 /*ignore*/);
+
+ core_gdbarch = gdbarch_from_bfd (core_bfd);
+
+ /* Find a suitable core file handler to munch on core_bfd */
+ core_vec = sniff_core_bfd (core_bfd);
validate_files ();
+ core_data = XCNEW (struct target_section_table);
+
/* Find the data section */
- if (build_section_table (core_bfd, &core_ops.to_sections,
- &core_ops.to_sections_end))
- error ("\"%s\": Can't find sections: %s",
+ if (build_section_table (core_bfd,
+ &core_data->sections,
+ &core_data->sections_end))
+ error (_("\"%s\": Can't find sections: %s"),
bfd_get_filename (core_bfd), bfd_errmsg (bfd_get_error ()));
- ontop = !push_target (&core_ops);
+ /* If we have no exec file, try to set the architecture from the
+ core file. We don't do this unconditionally since an exec file
+ typically contains more information that helps us determine the
+ architecture than a core file. */
+ if (!exec_bfd)
+ set_gdbarch_from_file (core_bfd);
+
+ push_target (&core_ops);
discard_cleanups (old_chain);
- p = bfd_core_file_failing_command (core_bfd);
- if (p)
- printf_filtered ("Core was generated by `%s'.\n", p);
+ /* Do this before acknowledging the inferior, so if
+ post_create_inferior throws (can happen easilly if you're loading
+ a core file with the wrong exec), we aren't left with threads
+ from the previous inferior. */
+ init_thread_list ();
- siggy = bfd_core_file_failing_signal (core_bfd);
- if (siggy > 0)
- printf_filtered ("Program terminated with signal %d, %s.\n", siggy,
- safe_strsignal (siggy));
+ inferior_ptid = null_ptid;
- /* Build up thread list from BFD sections. */
+ /* Need to flush the register cache (and the frame cache) from a
+ previous debug session. If inferior_ptid ends up the same as the
+ last debug session --- e.g., b foo; run; gcore core1; step; gcore
+ core2; core core1; core core2 --- then there's potential for
+ get_current_regcache to return the cached regcache of the
+ previous session, and the frame cache being stale. */
+ registers_changed ();
- init_thread_list ();
+ /* Build up thread list from BFD sections, and possibly set the
+ current thread to the .reg/NN section matching the .reg
+ section. */
bfd_map_over_sections (core_bfd, add_to_thread_list,
bfd_get_section_by_name (core_bfd, ".reg"));
- if (ontop)
+ if (ptid_equal (inferior_ptid, null_ptid))
{
- /* Fetch all registers from core file. */
- target_fetch_registers (-1);
+ /* Either we found no .reg/NN section, and hence we have a
+ non-threaded core (single-threaded, from gdb's perspective),
+ or for some reason add_to_thread_list couldn't determine
+ which was the "main" thread. The latter case shouldn't
+ usually happen, but we're dealing with input here, which can
+ always be broken in different ways. */
+ struct thread_info *thread = first_thread_of_process (-1);
+
+ if (thread == NULL)
+ {
+ inferior_appeared (current_inferior (), CORELOW_PID);
+ inferior_ptid = pid_to_ptid (CORELOW_PID);
+ add_thread_silent (inferior_ptid);
+ }
+ else
+ switch_to_thread (thread->ptid);
+ }
- /* Add symbols and section mappings for any shared libraries. */
-#ifdef SOLIB_ADD
- catch_errors (solib_add_stub, &from_tty, (char *)0,
- RETURN_MASK_ALL);
-#endif
+ post_create_inferior (&core_ops, from_tty);
- /* Now, set up the frame cache, and print the top of stack. */
- flush_cached_frames ();
- select_frame (get_current_frame (), 0);
- print_stack_frame (selected_frame, selected_frame_level, 1);
+ /* Now go through the target stack looking for threads since there
+ may be a thread_stratum target loaded on top of target core by
+ now. The layer above should claim threads found in the BFD
+ sections. */
+ TRY_CATCH (except, RETURN_MASK_ERROR)
+ {
+ target_find_new_threads ();
}
- else
+
+ if (except.reason < 0)
+ exception_print (gdb_stderr, except);
+
+ p = bfd_core_file_failing_command (core_bfd);
+ if (p)
+ printf_filtered (_("Core was generated by `%s'.\n"), p);
+
+ /* Clearing any previous state of convenience variables. */
+ clear_exit_convenience_vars ();
+
+ siggy = bfd_core_file_failing_signal (core_bfd);
+ if (siggy > 0)
{
- warning (
-"you won't be able to access this core file until you terminate\n\
-your %s; do ``info files''", target_longname);
+ /* If we don't have a CORE_GDBARCH to work with, assume a native
+ core (map gdb_signal from host signals). If we do have
+ CORE_GDBARCH to work with, but no gdb_signal_from_target
+ implementation for that gdbarch, as a fallback measure,
+ assume the host signal mapping. It'll be correct for native
+ cores, but most likely incorrect for cross-cores. */
+ enum gdb_signal sig = (core_gdbarch != NULL
+ && gdbarch_gdb_signal_from_target_p (core_gdbarch)
+ ? gdbarch_gdb_signal_from_target (core_gdbarch,
+ siggy)
+ : gdb_signal_from_host (siggy));
+
+ printf_filtered (_("Program terminated with signal %s, %s.\n"),
+ gdb_signal_to_name (sig), gdb_signal_to_string (sig));
+
+ /* Set the value of the internal variable $_exitsignal,
+ which holds the signal uncaught by the inferior. */
+ set_internalvar_integer (lookup_internalvar ("_exitsignal"),
+ siggy);
}
+
+ /* 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, 1);
}
static void
-core_detach (args, from_tty)
- char *args;
- int from_tty;
+core_detach (struct target_ops *ops, const char *args, int from_tty)
{
if (args)
- error ("Too many arguments");
- unpush_target (&core_ops);
+ error (_("Too many arguments"));
+ unpush_target (ops);
reinit_frame_cache ();
if (from_tty)
- printf_filtered ("No core file now.\n");
+ printf_filtered (_("No core file now.\n"));
}
-/* 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. */
+/* 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.
-/* We just get all the registers, so we don't use regno. */
+ 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. */
-/* ARGSUSED */
static void
-get_core_registers (regno)
- int regno;
+get_core_register_section (struct regcache *regcache,
+ const char *name,
+ int which,
+ const char *human_name,
+ int required)
{
- sec_ptr reg_sec;
- unsigned size;
- char *the_regs;
- char secname[30];
- enum bfd_flavour our_flavour = bfd_get_flavour (core_bfd);
- struct core_fns *cf = NULL;
-
- if (core_file_fns == NULL)
+ static char *section_name = NULL;
+ struct bfd_section *section;
+ bfd_size_type size;
+ char *contents;
+
+ xfree (section_name);
+
+ 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)
{
- fprintf_filtered (gdb_stderr,
- "Can't fetch registers from this type of core file\n");
+ if (required)
+ warning (_("Couldn't find %s registers in core file."),
+ human_name);
return;
}
- /* Thread support. If inferior_pid is non-zero, then we have found a core
- file with threads (or multiple processes). In that case, we need to
- use the appropriate register section, else we just use `.reg'. */
-
- /* XXX - same thing needs to be done for floating-point (.reg2) sections. */
+ 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 (inferior_pid)
- sprintf (secname, ".reg/%d", inferior_pid);
- else
- strcpy (secname, ".reg");
-
- reg_sec = bfd_get_section_by_name (core_bfd, secname);
- if (!reg_sec)
- goto cant;
- size = bfd_section_size (core_bfd, reg_sec);
- the_regs = alloca (size);
- /* Look for the core functions that match this flavor. Default to the
- first one if nothing matches. */
- for (cf = core_file_fns; cf != NULL; cf = cf -> next)
+ if (core_gdbarch && gdbarch_regset_from_core_section_p (core_gdbarch))
{
- if (our_flavour == cf -> core_flavour)
+ const struct regset *regset;
+
+ regset = gdbarch_regset_from_core_section (core_gdbarch,
+ name, size);
+ if (regset == NULL)
{
- break;
+ if (required)
+ warning (_("Couldn't recognize %s registers in core file."),
+ human_name);
+ return;
}
+
+ regset->supply_regset (regset, regcache, -1, contents, size);
+ return;
}
- if (cf == NULL)
+
+ 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)
+{
+ struct core_regset_section *sect_list;
+ int i;
+
+ if (!(core_gdbarch && gdbarch_regset_from_core_section_p (core_gdbarch))
+ && (core_vec == NULL || core_vec->core_read_registers == NULL))
{
- cf = core_file_fns;
+ fprintf_filtered (gdb_stderr,
+ "Can't fetch registers from this type of core file\n");
+ return;
}
- if (cf != NULL &&
- bfd_get_section_contents (core_bfd, reg_sec, the_regs, (file_ptr)0, size) &&
- cf -> core_read_registers != NULL)
+
+ sect_list = gdbarch_core_regset_sections (get_regcache_arch (regcache));
+ if (sect_list)
+ while (sect_list->sect_name != NULL)
+ {
+ if (strcmp (sect_list->sect_name, ".reg") == 0)
+ get_core_register_section (regcache, sect_list->sect_name,
+ 0, sect_list->human_name, 1);
+ else if (strcmp (sect_list->sect_name, ".reg2") == 0)
+ get_core_register_section (regcache, sect_list->sect_name,
+ 2, sect_list->human_name, 0);
+ else
+ get_core_register_section (regcache, sect_list->sect_name,
+ 3, sect_list->human_name, 0);
+
+ sect_list++;
+ }
+
+ else
{
- (cf -> core_read_registers (the_regs, size, 0,
- (unsigned) bfd_section_vma (abfd,reg_sec)));
+ get_core_register_section (regcache,
+ ".reg", 0, "general-purpose", 1);
+ get_core_register_section (regcache,
+ ".reg2", 2, "floating-point", 0);
}
- else
+
+ /* Mark all registers not found in the core as unavailable. */
+ for (i = 0; i < gdbarch_num_regs (get_regcache_arch (regcache)); i++)
+ if (regcache_register_status (regcache, i) == REG_UNKNOWN)
+ regcache_raw_supply (regcache, i, NULL);
+}
+
+static void
+core_files_info (struct target_ops *t)
+{
+ print_section_info (core_data, core_bfd);
+}
+\f
+struct spuid_list
+{
+ gdb_byte *buf;
+ ULONGEST offset;
+ LONGEST len;
+ ULONGEST pos;
+ ULONGEST written;
+};
+
+static void
+add_to_spuid_list (bfd *abfd, asection *asect, void *list_p)
+{
+ struct spuid_list *list = list_p;
+ enum bfd_endian byte_order
+ = bfd_big_endian (abfd) ? BFD_ENDIAN_BIG : BFD_ENDIAN_LITTLE;
+ int fd, pos = 0;
+
+ sscanf (bfd_section_name (abfd, asect), "SPU/%d/regs%n", &fd, &pos);
+ if (pos == 0)
+ return;
+
+ if (list->pos >= list->offset && list->pos + 4 <= list->offset + list->len)
{
-cant:
- fprintf_filtered (gdb_stderr,
- "Couldn't fetch registers from core file: %s\n",
- bfd_errmsg (bfd_get_error ()));
+ store_unsigned_integer (list->buf + list->pos - list->offset,
+ 4, byte_order, fd);
+ list->written += 4;
}
+ list->pos += 4;
+}
+
+/* Read siginfo data from the core, if possible. Returns -1 on
+ failure. Otherwise, returns the number of bytes read. ABFD is the
+ core file's BFD; READBUF, OFFSET, and LEN are all as specified by
+ the to_xfer_partial interface. */
- /* Now do it again for the float registers, if they exist. */
- reg_sec = bfd_get_section_by_name (core_bfd, ".reg2");
- if (reg_sec)
+static LONGEST
+get_core_siginfo (bfd *abfd, gdb_byte *readbuf, ULONGEST offset, ULONGEST len)
+{
+ asection *section;
+ char *section_name;
+ const char *name = ".note.linuxcore.siginfo";
+
+ 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 (abfd, section_name);
+ xfree (section_name);
+ if (section == NULL)
+ return -1;
+
+ if (!bfd_get_section_contents (abfd, section, readbuf, offset, len))
+ return -1;
+
+ return len;
+}
+
+static enum target_xfer_status
+core_xfer_partial (struct target_ops *ops, enum target_object object,
+ const char *annex, gdb_byte *readbuf,
+ const gdb_byte *writebuf, ULONGEST offset,
+ ULONGEST len, ULONGEST *xfered_len)
+{
+ switch (object)
{
- size = bfd_section_size (core_bfd, reg_sec);
- the_regs = alloca (size);
- if (cf != NULL &&
- bfd_get_section_contents (core_bfd, reg_sec, the_regs, (file_ptr)0, size) &&
- cf -> core_read_registers != NULL)
+ case TARGET_OBJECT_MEMORY:
+ return section_table_xfer_memory_partial (readbuf, writebuf,
+ offset, len, xfered_len,
+ core_data->sections,
+ core_data->sections_end,
+ NULL);
+
+ case TARGET_OBJECT_AUXV:
+ if (readbuf)
{
- (cf -> core_read_registers (the_regs, size, 2,
- (unsigned) bfd_section_vma (abfd,reg_sec)));
+ /* 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;
+
+ section = bfd_get_section_by_name (core_bfd, ".auxv");
+ if (section == NULL)
+ return TARGET_XFER_E_IO;
+
+ size = bfd_section_size (core_bfd, section);
+ if (offset >= size)
+ return TARGET_XFER_EOF;
+ size -= offset;
+ if (size > len)
+ size = len;
+
+ if (size == 0)
+ return TARGET_XFER_EOF;
+ if (!bfd_get_section_contents (core_bfd, section, readbuf,
+ (file_ptr) offset, size))
+ {
+ warning (_("Couldn't read NT_AUXV note in core file."));
+ return TARGET_XFER_E_IO;
+ }
+
+ *xfered_len = (ULONGEST) size;
+ return TARGET_XFER_OK;
}
- else
+ return TARGET_XFER_E_IO;
+
+ 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;
+
+ section = bfd_get_section_by_name (core_bfd, ".wcookie");
+ if (section == NULL)
+ return TARGET_XFER_E_IO;
+
+ size = bfd_section_size (core_bfd, section);
+ if (offset >= size)
+ return 0;
+ size -= offset;
+ if (size > len)
+ size = len;
+
+ if (size == 0)
+ return TARGET_XFER_EOF;
+ if (!bfd_get_section_contents (core_bfd, section, readbuf,
+ (file_ptr) offset, size))
+ {
+ warning (_("Couldn't read StackGhost cookie in core file."));
+ return TARGET_XFER_E_IO;
+ }
+
+ *xfered_len = (ULONGEST) size;
+ return TARGET_XFER_OK;
+
+ }
+ return TARGET_XFER_E_IO;
+
+ case TARGET_OBJECT_LIBRARIES:
+ if (core_gdbarch
+ && gdbarch_core_xfer_shared_libraries_p (core_gdbarch))
{
- fprintf_filtered (gdb_stderr,
- "Couldn't fetch register set 2 from core file: %s\n",
- bfd_errmsg (bfd_get_error ()));
+ if (writebuf)
+ return TARGET_XFER_E_IO;
+ else
+ {
+ *xfered_len = gdbarch_core_xfer_shared_libraries (core_gdbarch,
+ readbuf,
+ offset, len);
+
+ if (*xfered_len == 0)
+ return TARGET_XFER_EOF;
+ else
+ return TARGET_XFER_OK;
+ }
}
+ /* FALL THROUGH */
+
+ case TARGET_OBJECT_LIBRARIES_AIX:
+ if (core_gdbarch
+ && gdbarch_core_xfer_shared_libraries_aix_p (core_gdbarch))
+ {
+ if (writebuf)
+ return TARGET_XFER_E_IO;
+ else
+ {
+ *xfered_len
+ = gdbarch_core_xfer_shared_libraries_aix (core_gdbarch,
+ readbuf, offset,
+ len);
+
+ if (*xfered_len == 0)
+ return TARGET_XFER_EOF;
+ else
+ return TARGET_XFER_OK;
+ }
+ }
+ /* FALL THROUGH */
+
+ case TARGET_OBJECT_SPU:
+ if (readbuf && annex)
+ {
+ /* When the SPU contexts are stored in a core file, BFD
+ represents this with a fake section called
+ "SPU/<annex>". */
+
+ struct bfd_section *section;
+ bfd_size_type size;
+ char sectionstr[100];
+
+ xsnprintf (sectionstr, sizeof sectionstr, "SPU/%s", annex);
+
+ section = bfd_get_section_by_name (core_bfd, sectionstr);
+ if (section == NULL)
+ return TARGET_XFER_E_IO;
+
+ size = bfd_section_size (core_bfd, section);
+ if (offset >= size)
+ return TARGET_XFER_EOF;
+ size -= offset;
+ if (size > len)
+ size = len;
+
+ if (size == 0)
+ return TARGET_XFER_EOF;
+ if (!bfd_get_section_contents (core_bfd, section, readbuf,
+ (file_ptr) offset, size))
+ {
+ warning (_("Couldn't read SPU section in core file."));
+ return TARGET_XFER_E_IO;
+ }
+
+ *xfered_len = (ULONGEST) size;
+ return TARGET_XFER_OK;
+ }
+ else if (readbuf)
+ {
+ /* NULL annex requests list of all present spuids. */
+ struct spuid_list list;
+
+ list.buf = readbuf;
+ list.offset = offset;
+ list.len = len;
+ list.pos = 0;
+ list.written = 0;
+ bfd_map_over_sections (core_bfd, add_to_spuid_list, &list);
+
+ if (list.written == 0)
+ return TARGET_XFER_EOF;
+ else
+ {
+ *xfered_len = (ULONGEST) list.written;
+ return TARGET_XFER_OK;
+ }
+ }
+ return TARGET_XFER_E_IO;
+
+ case TARGET_OBJECT_SIGNAL_INFO:
+ if (readbuf)
+ {
+ LONGEST l = get_core_siginfo (core_bfd, readbuf, offset, len);
+
+ if (l > 0)
+ {
+ *xfered_len = len;
+ return TARGET_XFER_OK;
+ }
+ }
+ return TARGET_XFER_E_IO;
+
+ default:
+ if (ops->beneath != NULL)
+ return ops->beneath->to_xfer_partial (ops->beneath, object,
+ annex, readbuf,
+ writebuf, offset, len,
+ xfered_len);
+ return TARGET_XFER_E_IO;
}
- registers_fetched ();
}
-static void
-core_files_info (t)
- struct target_ops *t;
-{
- print_section_info (t, core_bfd);
-}
\f
/* If mourn is being called in all the right places, this could be say
- `gdb internal error' (since generic_mourn calls breakpoint_init_inferior). */
+ `gdb internal error' (since generic_mourn calls
+ breakpoint_init_inferior). */
static int
-ignore (addr, contents)
- CORE_ADDR addr;
- char *contents;
+ignore (struct target_ops *ops, struct gdbarch *gdbarch,
+ struct bp_target_info *bp_tgt)
{
return 0;
}
-struct target_ops core_ops = {
- "core", /* to_shortname */
- "Local core dump file", /* to_longname */
- "Use a core file as a target. Specify the filename of the core file.", /* to_doc */
- core_open, /* to_open */
- core_close, /* to_close */
- find_default_attach, /* to_attach */
- core_detach, /* to_detach */
- 0, /* to_resume */
- 0, /* to_wait */
- get_core_registers, /* to_fetch_registers */
- 0, /* to_store_registers */
- 0, /* to_prepare_to_store */
- xfer_memory, /* to_xfer_memory */
- core_files_info, /* to_files_info */
- ignore, /* to_insert_breakpoint */
- ignore, /* to_remove_breakpoint */
- 0, /* to_terminal_init */
- 0, /* to_terminal_inferior */
- 0, /* to_terminal_ours_for_output */
- 0, /* to_terminal_ours */
- 0, /* to_terminal_info */
- 0, /* to_kill */
- 0, /* to_load */
- 0, /* to_lookup_symbol */
- find_default_create_inferior, /* to_create_inferior */
- 0, /* to_mourn_inferior */
- 0, /* to_can_run */
- 0, /* to_notice_signals */
- 0, /* to_thread_alive */
- 0, /* to_stop */
- core_stratum, /* to_stratum */
- 0, /* to_next */
- 0, /* to_has_all_memory */
- 1, /* to_has_memory */
- 1, /* to_has_stack */
- 1, /* to_has_registers */
- 0, /* to_has_execution */
- 0, /* to_sections */
- 0, /* to_sections_end */
- OPS_MAGIC, /* to_magic */
-};
-/* non-zero if we should not do the add_target call in
- _initialize_corelow; not initialized (i.e., bss) so that
- the target can initialize it (i.e., data) if appropriate.
- This needs to be set at compile time because we don't know
- for sure whether the target's initialize routine is called
- before us or after us. */
-int coreops_suppress_target;
+/* 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 (core_gdbarch && gdbarch_core_read_description_p (core_gdbarch))
+ {
+ const struct target_desc *result;
+
+ result = gdbarch_core_read_description (core_gdbarch,
+ target, core_bfd);
+ if (result != NULL)
+ return result;
+ }
+
+ return target->beneath->to_read_description (target->beneath);
+}
+
+static char *
+core_pid_to_str (struct target_ops *ops, ptid_t ptid)
+{
+ static char buf[64];
+ struct inferior *inf;
+ int pid;
+
+ /* The preferred way is to have a gdbarch/OS specific
+ implementation. */
+ if (core_gdbarch
+ && gdbarch_core_pid_to_str_p (core_gdbarch))
+ return gdbarch_core_pid_to_str (core_gdbarch, ptid);
+
+ /* Otherwise, if we don't have one, we'll just fallback to
+ "process", with normal_pid_to_str. */
+
+ /* Try the LWPID field first. */
+ pid = ptid_get_lwp (ptid);
+ if (pid != 0)
+ return normal_pid_to_str (pid_to_ptid (pid));
+
+ /* Otherwise, this isn't a "threaded" core -- use the PID field, but
+ only if it isn't a fake PID. */
+ inf = find_inferior_pid (ptid_get_pid (ptid));
+ if (inf != NULL && !inf->fake_pid_p)
+ return normal_pid_to_str (ptid);
+
+ /* No luck. We simply don't have a valid PID to print. */
+ xsnprintf (buf, sizeof buf, "<main task>");
+ return buf;
+}
+
+static int
+core_has_memory (struct target_ops *ops)
+{
+ return (core_bfd != NULL);
+}
+
+static int
+core_has_stack (struct target_ops *ops)
+{
+ return (core_bfd != NULL);
+}
+
+static int
+core_has_registers (struct target_ops *ops)
+{
+ return (core_bfd != NULL);
+}
+
+/* Implement the to_info_proc method. */
+
+static void
+core_info_proc (struct target_ops *ops, char *args, enum info_proc_what request)
+{
+ struct gdbarch *gdbarch = get_current_arch ();
+
+ /* Since this is the core file target, call the 'core_info_proc'
+ method on gdbarch, not 'info_proc'. */
+ if (gdbarch_core_info_proc_p (gdbarch))
+ gdbarch_core_info_proc (gdbarch, args, request);
+}
+
+/* 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_detach = core_detach;
+ core_ops.to_fetch_registers = get_core_registers;
+ core_ops.to_xfer_partial = core_xfer_partial;
+ core_ops.to_files_info = core_files_info;
+ core_ops.to_insert_breakpoint = ignore;
+ core_ops.to_remove_breakpoint = ignore;
+ 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 = process_stratum;
+ core_ops.to_has_memory = core_has_memory;
+ core_ops.to_has_stack = core_has_stack;
+ core_ops.to_has_registers = core_has_registers;
+ core_ops.to_info_proc = core_info_proc;
+ core_ops.to_magic = OPS_MAGIC;
+
+ if (core_target)
+ internal_error (__FILE__, __LINE__,
+ _("init_core_ops: core target already exists (\"%s\")."),
+ core_target->to_longname);
+ core_target = &core_ops;
+}
void
-_initialize_corelow()
+_initialize_corelow (void)
{
- if (!coreops_suppress_target)
- add_target (&core_ops);
+ init_core_ops ();
+
+ add_target_with_completer (&core_ops, filename_completer);
}
projects / deliverable / binutils-gdb.git / blobdiff