binutils-gdb/gdb/core.c

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/* Core dump and executable file functions above target vector, for GDB.
Copyright 1986, 1987, 1989, 1991, 1992, 1993, 1994
Free Software Foundation, Inc.
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This file is part of GDB.
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
the Free Software Foundation; either version 2 of the License, or
(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
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., 675 Mass Ave, Cambridge, MA 02139, USA. */
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#include "defs.h"
#include <string.h>
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#include <errno.h>
#include <signal.h>
Make writing to files work properly. (Fixes to BFD are also needed.) * core.c (core_open): Open file ourselves, read or r/w, depending on write_files. Use bfd_fdopenr. * gdbcore.h (write_files): New variable. * exec.c (write_files): Define variable, add set&show for it. (exec_file_command): Use write_files to open for read or r/write. Make shared library reading happen automatically. These changes are mostly from Peter Schauer <pes@regent.e-technik.tu-muenchen.de>. * inferior.h (stop_soon_quietly): Add to exported variables. * infrun.c (child_create_inferior): call solib hook, if defined. (child_attach): call solib hook, if defined. * solib.c: Include inferior.h. Add from_tty to so_list as kludge. (find_solib): Use lookup_misc_func rather than hand-rolled. (symbol_add_stub): New stub for catch_errors. (solib_add): Avoid output if !from_tty. Catch errors rather than just calling symbol_file_add and bombing. (solib_create_inferior_hook): Interface with the target process to let it read and alloc shared libs, then figure out what it did. * core.c (validate_files): Fix typo, soften warning. (Fix from Hiroto Kagotani <kagotani@cs.titech.ac.jp>.) * utils.c (fputs_demangled): Avoid duplicate printing if demangling is off. (Fix from J.T. Conklin <jtc@cayenne.com>.) * infrun.c (proceed): Cast -1 to (CORE_ADDR) before comparing. (Fix from pierre@la.tce.com (Pierre Willard).) * main.c (catch_errors): Change argument to a char * from an int, since a char * can point to a struct full of glop, but an int is not guaranteed to be able to hold a pointer. * breakpoint.c (breakpoint_cond_eval, bpstat_stop_status, breakpoint_re_set_one, breakpoint_re_set): Adapt. * core.c (core_open, solib_add_stub): Adapt. * remote-vx.c (symbol_stub, add_symbol_stub, callers): Adapt.
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#include <fcntl.h>
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#include "frame.h" /* required by inferior.h */
#include "inferior.h"
#include "symtab.h"
#include "command.h"
#include "gdbcmd.h"
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#include "bfd.h"
#include "target.h"
#include "gdbcore.h"
#include "dis-asm.h"
* Makefile.in (c-exp.tab.o): Remove notice about shift/reduce conflicts which no longer occur. gcc -Wall lint: * findvar.c (symbol_read_needs_frame), corelow.c (ignore), inflow.c (gdb_has_a_terminal): Make sure to return a value. * regex.h: Declare re_set_syntax. * printcmd.c: Include valprint.h. * infcmd.c, exec.c, maint.c, core.c: Include language.h. * maint.c: Include expression.h. * infrun.c, fork-child.c, corelow.c, inflow.c: Include thread.h. * inftarg.c: Include command.h. * coredep.c: Include value.h. * c-exp.y, m2-exp.y, ch-exp.y: Include bfd.h, symfile.h and objfiles.h. * ch-typeprint.c: Include typeprint.h. * ch-valprint.c: Include c-lang.h. * nlmread.c: Include buildsym.h. * environ.c: Include gdbcore.h. Only include defs.h once. (set_in_environ): Cast const char * to char * when passing to set_gnutarget. Remove unused variables: * printcmd.c (printf_command): args_to_vprintf. * coffread.c (coff_symfile_init): strsection. Move variables to within the #ifdefs where they are used: * symtab.c (gdb_mangle_name): opname. * inftarg.c (child_attach): pid and exec_file. * inftarg.c (child_detach): siggnal. * objfiles.c (allocate_objfile): mapto, md, and fd. * objfiles.c (free_objfile): mmfd. * infrun.c (wait_for_inferior): Include BPSTAT_WHAT_LAST in switch. * infrun.c (wait_for_inferior): Remove unused same_pid label. * inferior.h: Declare set_sigint_trap and clear_sigint_trap. * parser-defs.h: Declare write_exp_elt_block. * stabsread.h: Declare elfstab_offset_sections and coffstab_build_psymtabs.
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#include "language.h"
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extern char registers[];
/* Hook for `exec_file_command' command to call. */
void (*exec_file_display_hook) PARAMS ((char *)) = NULL;
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/* Binary file diddling handle for the core file. */
bfd *core_bfd = NULL;
/* Backward compatability with old way of specifying core files. */
void
core_file_command (filename, from_tty)
char *filename;
int from_tty;
{
struct target_ops *t;
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dont_repeat (); /* Either way, seems bogus. */
t = find_core_target ();
if (t != NULL)
if (!filename)
(t->to_detach) (filename, from_tty);
else
(t->to_open) (filename, from_tty);
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else
error ("GDB can't read core files on this machine.");
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}
/* Call this to specify the hook for exec_file_command to call back.
This is called from the x-window display code. */
void
specify_exec_file_hook (hook)
void (*hook) PARAMS ((char *));
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{
exec_file_display_hook = hook;
}
/* The exec file must be closed before running an inferior.
If it is needed again after the inferior dies, it must
be reopened. */
void
close_exec_file ()
{
#ifdef FIXME
if (exec_bfd)
bfd_tempclose (exec_bfd);
#endif
}
void
reopen_exec_file ()
{
#ifdef FIXME
if (exec_bfd)
bfd_reopen (exec_bfd);
#endif
}
/* If we have both a core file and an exec file,
print a warning if they don't go together. */
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void
validate_files ()
{
if (exec_bfd && core_bfd)
{
Make writing to files work properly. (Fixes to BFD are also needed.) * core.c (core_open): Open file ourselves, read or r/w, depending on write_files. Use bfd_fdopenr. * gdbcore.h (write_files): New variable. * exec.c (write_files): Define variable, add set&show for it. (exec_file_command): Use write_files to open for read or r/write. Make shared library reading happen automatically. These changes are mostly from Peter Schauer <pes@regent.e-technik.tu-muenchen.de>. * inferior.h (stop_soon_quietly): Add to exported variables. * infrun.c (child_create_inferior): call solib hook, if defined. (child_attach): call solib hook, if defined. * solib.c: Include inferior.h. Add from_tty to so_list as kludge. (find_solib): Use lookup_misc_func rather than hand-rolled. (symbol_add_stub): New stub for catch_errors. (solib_add): Avoid output if !from_tty. Catch errors rather than just calling symbol_file_add and bombing. (solib_create_inferior_hook): Interface with the target process to let it read and alloc shared libs, then figure out what it did. * core.c (validate_files): Fix typo, soften warning. (Fix from Hiroto Kagotani <kagotani@cs.titech.ac.jp>.) * utils.c (fputs_demangled): Avoid duplicate printing if demangling is off. (Fix from J.T. Conklin <jtc@cayenne.com>.) * infrun.c (proceed): Cast -1 to (CORE_ADDR) before comparing. (Fix from pierre@la.tce.com (Pierre Willard).) * main.c (catch_errors): Change argument to a char * from an int, since a char * can point to a struct full of glop, but an int is not guaranteed to be able to hold a pointer. * breakpoint.c (breakpoint_cond_eval, bpstat_stop_status, breakpoint_re_set_one, breakpoint_re_set): Adapt. * core.c (core_open, solib_add_stub): Adapt. * remote-vx.c (symbol_stub, add_symbol_stub, callers): Adapt.
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if (!core_file_matches_executable_p (core_bfd, exec_bfd))
warning ("core file may not match specified executable file.");
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else if (bfd_get_mtime(exec_bfd) > bfd_get_mtime(core_bfd))
warning ("exec file is newer than core file.");
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}
}
/* Return the name of the executable file as a string.
ERR nonzero means get error if there is none specified;
otherwise return 0 in that case. */
char *
get_exec_file (err)
int err;
{
if (exec_bfd) return bfd_get_filename(exec_bfd);
if (!err) return NULL;
error ("No executable file specified.\n\
Use the \"file\" or \"exec-file\" command.");
return NULL;
}
/* Report a memory error with error(). */
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void
memory_error (status, memaddr)
int status;
CORE_ADDR memaddr;
{
if (status == EIO)
{
/* Actually, address between memaddr and memaddr + len
was out of bounds. */
error_begin ();
printf_filtered ("Cannot access memory at address ");
print_address_numeric (memaddr, 1, gdb_stdout);
printf_filtered (".\n");
return_to_top_level (RETURN_ERROR);
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}
else
{
error_begin ();
printf_filtered ("Error accessing memory address ");
print_address_numeric (memaddr, 1, gdb_stdout);
printf_filtered (": %s.\n",
safe_strerror (status));
return_to_top_level (RETURN_ERROR);
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}
}
/* Same as target_read_memory, but report an error if can't read. */
void
read_memory (memaddr, myaddr, len)
CORE_ADDR memaddr;
char *myaddr;
int len;
{
int status;
status = target_read_memory (memaddr, myaddr, len);
if (status != 0)
memory_error (status, memaddr);
}
/* Like target_read_memory, but slightly different parameters. */
int
dis_asm_read_memory (memaddr, myaddr, len, info)
bfd_vma memaddr;
bfd_byte *myaddr;
int len;
disassemble_info *info;
{
return target_read_memory (memaddr, (char *) myaddr, len);
}
/* Like memory_error with slightly different parameters. */
void
dis_asm_memory_error (status, memaddr, info)
int status;
bfd_vma memaddr;
disassemble_info *info;
{
memory_error (status, memaddr);
}
/* Like print_address with slightly different parameters. */
void
dis_asm_print_address (addr, info)
bfd_vma addr;
struct disassemble_info *info;
{
print_address (addr, info->stream);
}
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/* Same as target_write_memory, but report an error if can't write. */
void
write_memory (memaddr, myaddr, len)
CORE_ADDR memaddr;
char *myaddr;
int len;
{
int status;
status = target_write_memory (memaddr, myaddr, len);
if (status != 0)
memory_error (status, memaddr);
}
/* Read an integer from debugged memory, given address and number of bytes. */
LONGEST
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read_memory_integer (memaddr, len)
CORE_ADDR memaddr;
int len;
{
char buf[sizeof (LONGEST)];
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read_memory (memaddr, buf, len);
return extract_signed_integer (buf, len);
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}
unsigned LONGEST
read_memory_unsigned_integer (memaddr, len)
CORE_ADDR memaddr;
int len;
{
char buf[sizeof (unsigned LONGEST)];
read_memory (memaddr, buf, len);
return extract_unsigned_integer (buf, len);
}
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#if 0
/* Enable after 4.12. It is not tested. */
/* Search code. Targets can just make this their search function, or
if the protocol has a less general search function, they can call this
in the cases it can't handle. */
void
generic_search (len, data, mask, startaddr, increment, lorange, hirange
addr_found, data_found)
int len;
char *data;
char *mask;
CORE_ADDR startaddr;
int increment;
CORE_ADDR lorange;
CORE_ADDR hirange;
CORE_ADDR *addr_found;
char *data_found;
{
int i;
CORE_ADDR curaddr = startaddr;
while (curaddr >= lorange && curaddr < hirange)
{
read_memory (curaddr, data_found, len);
for (i = 0; i < len; ++i)
if ((data_found[i] & mask[i]) != data[i])
goto try_again;
/* It matches. */
*addr_found = curaddr;
return;
try_again:
curaddr += increment;
}
*addr_found = (CORE_ADDR)0;
return;
}
#endif /* 0 */
/* The current default bfd target. Points to storage allocated for
gnutarget_string. */
char *gnutarget;
/* Same thing, except it is "auto" not NULL for the default case. */
static char *gnutarget_string;
static void set_gnutarget_command
PARAMS ((char *, int, struct cmd_list_element *));
static void
set_gnutarget_command (ignore, from_tty, c)
char *ignore;
int from_tty;
struct cmd_list_element *c;
{
if (STREQ (gnutarget_string, "auto"))
gnutarget = NULL;
else
gnutarget = gnutarget_string;
}
/* Set the gnutarget. */
void
set_gnutarget (newtarget)
char *newtarget;
{
if (gnutarget_string != NULL)
free (gnutarget_string);
gnutarget_string = savestring (newtarget, strlen (newtarget));
set_gnutarget_command (NULL, 0, NULL);
}
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void
_initialize_core()
{
struct cmd_list_element *c;
c = add_cmd ("core-file", class_files, core_file_command,
"Use FILE as core dump for examining memory and registers.\n\
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No arg means have no core file. This command has been superseded by the\n\
`target core' and `detach' commands.", &cmdlist);
c->completer = filename_completer;
c = add_set_cmd ("gnutarget", class_files, var_string_noescape,
(char *) &gnutarget_string,
"Set the current BFD target.\n\
Use `set gnutarget auto' to specify automatic detection.",
&setlist);
c->function.sfunc = set_gnutarget_command;
add_show_from_set (c, &showlist);
if (getenv ("GNUTARGET"))
set_gnutarget (getenv ("GNUTARGET"));
else
set_gnutarget ("auto");
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}