Copyright 1986, 87, 89, 91, 92, 93, 94, 95, 96, 97, 1998
Free Software Foundation, Inc.
-This file is part of GDB.
+ This file is part of GDB.
-This program is free software; you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation; either version 2 of the License, or
-(at your option) any later version.
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 2 of the License, or
+ (at your option) any later version.
-This program is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-GNU General Public License for more details.
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
-You should have received a copy of the GNU General Public License
-along with this program; if not, write to the Free Software
-Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, write to the Free Software
+ Foundation, Inc., 59 Temple Place - Suite 330,
+ Boston, MA 02111-1307, USA. */
#include "defs.h"
#include "gdb_string.h"
#include <errno.h>
#include <signal.h>
#include <fcntl.h>
-#include <unistd.h>
-#include "frame.h" /* required by inferior.h */
+#include "frame.h" /* required by inferior.h */
#include "inferior.h"
#include "symtab.h"
#include "command.h"
static struct core_fns *core_file_fns = NULL;
+/* The core_fns for a core file handler that is prepared to read the core
+ file currently open on core_bfd. */
+
+static struct core_fns *core_vec = NULL;
+
static void core_files_info PARAMS ((struct target_ops *));
#ifdef SOLIB_ADD
static int solib_add_stub PARAMS ((PTR));
#endif
+static struct core_fns *sniff_core_bfd PARAMS ((bfd *));
+
+static boolean gdb_check_format PARAMS ((bfd *));
+
static void core_open PARAMS ((char *, int));
static void core_detach PARAMS ((char *, int));
add_core_fns (cf)
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. */
+
+int
+default_core_sniffer (our_fns, abfd)
+ struct core_fns *our_fns;
+ bfd *abfd;
+{
+ int result;
+
+ 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. Default to the first one in the
+ list of nothing matches. Returns pointer to set that is
+ selected. */
+
+static struct core_fns *
+sniff_core_bfd (abfd)
+ bfd *abfd;
+{
+ struct core_fns *cf;
+ struct core_fns *yummy = NULL;
+ int matches = 0;;
+
+ for (cf = core_file_fns; cf != NULL; cf = cf->next)
+ {
+ 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)
+ {
+ warning ("\"%s\": no core file handler recognizes format, using default",
+ bfd_get_filename (abfd));
+ }
+ if (yummy == NULL)
+ {
+ yummy = core_file_fns;
+ }
+ 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 (abfd)
+ bfd *abfd;
+{
+ return (0);
+}
+
+/* Attempt to recognize core file formats that BFD rejects. */
+
+static boolean
+gdb_check_format (abfd)
+ bfd *abfd;
+{
+ struct core_fns *cf;
+
+ for (cf = core_file_fns; cf != NULL; cf = cf->next)
+ {
+ if (cf->check_format (abfd))
+ {
+ return (true);
+ }
+ }
+ return (false);
+}
/* Discard all vestiges of any previous core file and mark data and stack
spaces as empty. */
{
inferior_pid = 0; /* Avoid confusion from thread stuff */
+ /* Clear out solib state while the bfd is still open. See
+ comments in clear_solib in solib.c. */
+#ifdef CLEAR_SOLIB
+ CLEAR_SOLIB ();
+#endif
+
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)
{
- free ((PTR)core_ops.to_sections);
+ free ((PTR) core_ops.to_sections);
core_ops.to_sections = NULL;
core_ops.to_sections_end = NULL;
}
}
+ core_vec = NULL;
}
#ifdef SOLIB_ADD
/* Stub function for catch_errors around shared library hacking. FROM_TTYP
is really an int * which points to from_tty. */
-static int
+static int
solib_add_stub (from_ttyp)
PTR from_ttyp;
{
- SOLIB_ADD (NULL, *(int *)from_ttyp, ¤t_target);
+ SOLIB_ADD (NULL, *(int *) from_ttyp, ¤t_target);
re_enable_breakpoints_in_shlibs ();
return 0;
}
/* Warning, Will Robinson, looking at BFD private data! */
if (reg_sect != NULL
- && asect->filepos == reg_sect->filepos) /* Did we find .reg? */
+ && asect->filepos == reg_sect->filepos) /* Did we find .reg? */
inferior_pid = thread_id; /* Yes, make it current */
}
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.");
+ error (core_bfd ?
+ "No core file specified. (Use `detach' to stop debugging a core file.)"
+ : "No core file specified.");
}
filename = tilde_expand (filename);
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). */
+ 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",
filename, bfd_errmsg (bfd_get_error ()));
/* Looks semi-reasonable. Toss the old core file and work on the new. */
- discard_cleanups (old_chain); /* Don't free filename any more */
+ discard_cleanups (old_chain); /* Don't free filename any more */
unpush_target (&core_ops);
core_bfd = temp_bfd;
old_chain = make_cleanup ((make_cleanup_func) core_close, core_bfd);
+ /* Find a suitable core file handler to munch on core_bfd */
+ core_vec = sniff_core_bfd (core_bfd);
+
validate_files ();
/* Find the data section */
/* Add symbols and section mappings for any shared libraries. */
#ifdef SOLIB_ADD
- catch_errors (solib_add_stub, &from_tty, (char *)0,
+ catch_errors (solib_add_stub, &from_tty, (char *) 0,
RETURN_MASK_ALL);
#endif
else
{
warning (
-"you won't be able to access this core file until you terminate\n\
+ "you won't be able to access this core file until you terminate\n\
your %s; do ``info files''", target_longname);
}
}
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_pid is zero, do the single-threaded thing: look for a
+ section named NAME. If inferior_pid is non-zero, do the
+ multi-threaded thing: look for a section named "NAME/PID", where
+ PID is the shortest ASCII decimal representation of inferior_pid.
+
+ 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 (char *name,
+ int which,
+ char *human_name,
+ int required)
+{
+ char section_name[100];
+ sec_ptr section;
+ bfd_size_type size;
+ char *contents;
+
+ if (inferior_pid)
+ sprintf (section_name, "%s/%d", name, inferior_pid);
+ else
+ strcpy (section_name, name);
+
+ section = bfd_get_section_by_name (core_bfd, section_name);
+ if (! section)
+ {
+ if (required)
+ warning ("Couldn't find %s registers in core file.\n", 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.\n",
+ human_name, name);
+ return;
+ }
+
+ core_vec->core_read_registers (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. */
get_core_registers (regno)
int regno;
{
- 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)
+ int status;
+
+ if (core_vec == NULL
+ || core_vec->core_read_registers == NULL)
{
fprintf_filtered (gdb_stderr,
- "Can't fetch registers from this type of core file\n");
+ "Can't fetch registers from this type of core file\n");
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. */
-
- 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 (our_flavour == cf -> core_flavour)
- {
- break;
- }
- }
- if (cf == NULL)
- {
- cf = core_file_fns;
- }
- if (cf != NULL &&
- bfd_get_section_contents (core_bfd, reg_sec, the_regs, (file_ptr)0, size) &&
- cf -> core_read_registers != NULL)
- {
- (cf -> core_read_registers (the_regs, size, 0,
- (unsigned) bfd_section_vma (abfd,reg_sec)));
- }
- else
- {
-cant:
- fprintf_filtered (gdb_stderr,
- "Couldn't fetch registers from core file: %s\n",
- bfd_errmsg (bfd_get_error ()));
- }
+ get_core_register_section (".reg", 0, "general-purpose", 1);
+ get_core_register_section (".reg2", 2, "floating-point", 0);
+ get_core_register_section (".reg-xfp", 3, "extended floating-point", 0);
- /* Now do it again for the float registers, if they exist. */
- reg_sec = bfd_get_section_by_name (core_bfd, ".reg2");
- if (reg_sec)
- {
- 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)
- {
- (cf -> core_read_registers (the_regs, size, 2,
- (unsigned) bfd_section_vma (abfd,reg_sec)));
- }
- else
- {
- fprintf_filtered (gdb_stderr,
- "Couldn't fetch register set 2 from core file: %s\n",
- bfd_errmsg (bfd_get_error ()));
- }
- }
registers_fetched ();
}
static char *
core_file_to_sym_file (core)
- char * core;
+ char *core;
{
- CONST char * failing_command;
- char * p;
- char * temp;
- bfd * temp_bfd;
- int scratch_chan;
+ CONST char *failing_command;
+ char *p;
+ char *temp;
+ bfd *temp_bfd;
+ int scratch_chan;
- if (! core)
+ if (!core)
error ("No core file specified.");
core = tilde_expand (core);
{
/* 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). */
+ 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",
core, bfd_errmsg (bfd_get_error ()));
than trying to be sauve about finding it, just check if the file
exists where we are now. If not, then punt and tell our client
we couldn't find the sym file.
- */
+ */
p = (char *) failing_command;
if ((p != NULL) && (access (p, F_OK) != 0))
p = NULL;
static void
core_files_info (t)
- struct target_ops *t;
+ struct target_ops *t;
{
print_section_info (t, core_bfd);
}
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_file_thread_alive (tid)
- int tid;
+ int tid;
{
return 1;
}
core_ops.to_has_memory = 1;
core_ops.to_has_stack = 1;
core_ops.to_has_registers = 1;
- core_ops.to_magic = OPS_MAGIC;
+ core_ops.to_magic = OPS_MAGIC;
}
/* non-zero if we should not do the add_target call in
projects / deliverable / binutils-gdb.git / blobdiff