27f1958c24
* gdbtk.c (gdb_get_breakpoint_info): Add string for new enumeration del_at_next_stop to bpdisp array. end-sanitize-gdbtk * eval.c (evaluate_subexp_for_sizeof): Handle dereferencing of non-pointer values. * symtab.c (gdb_mangle_name): Improve mangling of nested types, their physical names already include the class name. * valops.c (value_cast): Handle upcast of a class pointer. From Andreas Schwab (schwab@issan.informatik.uni-dortmund.de): * corelow.c (get_core_registers): Make secname big enough.
424 lines
11 KiB
C
424 lines
11 KiB
C
/* Core dump and executable file functions below target vector, for GDB.
|
||
Copyright 1986, 1987, 1989, 1991, 1992, 1993, 1994, 1995, 1996, 1997
|
||
Free Software Foundation, Inc.
|
||
|
||
This file is part of GDB.
|
||
|
||
This program is free software; you can redistribute it and/or modify
|
||
it under the terms of the GNU General Public License as published by
|
||
the Free Software Foundation; either version 2 of the License, or
|
||
(at your option) any later version.
|
||
|
||
This program is distributed in the hope that it will be useful,
|
||
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||
GNU General Public License for more details.
|
||
|
||
You should have received a copy of the GNU General Public License
|
||
along with this program; if not, write to the Free Software
|
||
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
|
||
|
||
#include "defs.h"
|
||
#include "gdb_string.h"
|
||
#include <errno.h>
|
||
#include <signal.h>
|
||
#include <fcntl.h>
|
||
#include "frame.h" /* required by inferior.h */
|
||
#include "inferior.h"
|
||
#include "symtab.h"
|
||
#include "command.h"
|
||
#include "bfd.h"
|
||
#include "target.h"
|
||
#include "gdbcore.h"
|
||
#include "gdbthread.h"
|
||
|
||
/* 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. */
|
||
|
||
static struct core_fns *core_file_fns = NULL;
|
||
|
||
static void core_files_info PARAMS ((struct target_ops *));
|
||
|
||
#ifdef SOLIB_ADD
|
||
static int solib_add_stub PARAMS ((char *));
|
||
#endif
|
||
|
||
static void core_open PARAMS ((char *, int));
|
||
|
||
static void core_detach PARAMS ((char *, int));
|
||
|
||
static void core_close PARAMS ((int));
|
||
|
||
static void get_core_registers PARAMS ((int));
|
||
|
||
static void add_to_thread_list PARAMS ((bfd *, asection *, PTR));
|
||
|
||
static int ignore PARAMS ((CORE_ADDR, char *));
|
||
|
||
/* 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. */
|
||
|
||
void
|
||
add_core_fns (cf)
|
||
struct core_fns *cf;
|
||
{
|
||
cf -> next = core_file_fns;
|
||
core_file_fns = cf;
|
||
}
|
||
|
||
|
||
/* Discard all vestiges of any previous core file and mark data and stack
|
||
spaces as empty. */
|
||
|
||
/* ARGSUSED */
|
||
static void
|
||
core_close (quitting)
|
||
int quitting;
|
||
{
|
||
char *name;
|
||
|
||
if (core_bfd)
|
||
{
|
||
inferior_pid = 0; /* Avoid confusion from thread stuff */
|
||
|
||
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);
|
||
core_ops.to_sections = NULL;
|
||
core_ops.to_sections_end = 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
|
||
solib_add_stub (from_ttyp)
|
||
char *from_ttyp;
|
||
{
|
||
SOLIB_ADD (NULL, *(int *)from_ttyp, ¤t_target);
|
||
re_enable_breakpoints_in_shlibs ();
|
||
return 0;
|
||
}
|
||
#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
|
||
add_to_thread_list (abfd, asect, reg_sect_arg)
|
||
bfd *abfd;
|
||
asection *asect;
|
||
PTR reg_sect_arg;
|
||
{
|
||
int thread_id;
|
||
asection *reg_sect = (asection *) reg_sect_arg;
|
||
|
||
if (strncmp (bfd_section_name (abfd, asect), ".reg/", 5) != 0)
|
||
return;
|
||
|
||
thread_id = atoi (bfd_section_name (abfd, asect) + 5);
|
||
|
||
add_thread (thread_id);
|
||
|
||
/* 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 */
|
||
}
|
||
|
||
/* This routine opens and sets up the core file bfd. */
|
||
|
||
static void
|
||
core_open (filename, from_tty)
|
||
char *filename;
|
||
int from_tty;
|
||
{
|
||
const char *p;
|
||
int siggy;
|
||
struct cleanup *old_chain;
|
||
char *temp;
|
||
bfd *temp_bfd;
|
||
int ontop;
|
||
int scratch_chan;
|
||
|
||
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.");
|
||
}
|
||
|
||
filename = tilde_expand (filename);
|
||
if (filename[0] != '/')
|
||
{
|
||
temp = concat (current_directory, "/", filename, NULL);
|
||
free (filename);
|
||
filename = temp;
|
||
}
|
||
|
||
old_chain = make_cleanup (free, filename);
|
||
|
||
scratch_chan = open (filename, write_files ? O_RDWR : O_RDONLY, 0);
|
||
if (scratch_chan < 0)
|
||
perror_with_name (filename);
|
||
|
||
temp_bfd = bfd_fdopenr (filename, gnutarget, scratch_chan);
|
||
if (temp_bfd == NULL)
|
||
perror_with_name (filename);
|
||
|
||
if (!bfd_check_format (temp_bfd, bfd_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). */
|
||
make_cleanup (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 */
|
||
unpush_target (&core_ops);
|
||
core_bfd = temp_bfd;
|
||
old_chain = make_cleanup (core_close, core_bfd);
|
||
|
||
validate_files ();
|
||
|
||
/* 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",
|
||
bfd_get_filename (core_bfd), bfd_errmsg (bfd_get_error ()));
|
||
|
||
ontop = !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);
|
||
|
||
siggy = bfd_core_file_failing_signal (core_bfd);
|
||
if (siggy > 0)
|
||
printf_filtered ("Program terminated with signal %d, %s.\n", siggy,
|
||
safe_strsignal (siggy));
|
||
|
||
/* Build up thread list from BFD sections. */
|
||
|
||
init_thread_list ();
|
||
bfd_map_over_sections (core_bfd, add_to_thread_list,
|
||
bfd_get_section_by_name (core_bfd, ".reg"));
|
||
|
||
if (ontop)
|
||
{
|
||
/* Fetch all registers from core file. */
|
||
target_fetch_registers (-1);
|
||
|
||
/* 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
|
||
|
||
/* 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);
|
||
}
|
||
else
|
||
{
|
||
warning (
|
||
"you won't be able to access this core file until you terminate\n\
|
||
your %s; do ``info files''", target_longname);
|
||
}
|
||
}
|
||
|
||
static void
|
||
core_detach (args, from_tty)
|
||
char *args;
|
||
int from_tty;
|
||
{
|
||
if (args)
|
||
error ("Too many arguments");
|
||
unpush_target (&core_ops);
|
||
reinit_frame_cache ();
|
||
if (from_tty)
|
||
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. */
|
||
|
||
/* We just get all the registers, so we don't use regno. */
|
||
|
||
/* ARGSUSED */
|
||
static void
|
||
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)
|
||
{
|
||
fprintf_filtered (gdb_stderr,
|
||
"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 ()));
|
||
}
|
||
|
||
/* 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 void
|
||
core_files_info (t)
|
||
struct target_ops *t;
|
||
{
|
||
print_section_info (t, core_bfd);
|
||
}
|
||
|
||
/* 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 (addr, contents)
|
||
CORE_ADDR addr;
|
||
char *contents;
|
||
{
|
||
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 */
|
||
};
|
||
|
||
void
|
||
_initialize_corelow()
|
||
{
|
||
add_target (&core_ops);
|
||
}
|