-/* Work with core dump and executable files, for GDB.
- Copyright (C) 1986, 1987, 1989 Free Software Foundation, Inc.
+/* Core dump and executable file functions above target vector, for GDB.
+ Copyright 1986, 1987, 1989, 1991, 1992 Free Software Foundation, Inc.
This file is part of GDB.
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
-#include <stdio.h>
+#include "defs.h"
#include <errno.h>
#include <signal.h>
-#include "defs.h"
-#include "param.h"
+#include <fcntl.h>
#include "frame.h" /* required by inferior.h */
#include "inferior.h"
#include "symtab.h"
#include "target.h"
#include "gdbcore.h"
-extern int xfer_memory ();
-extern void child_attach (), child_create_inferior ();
-
-extern int sys_nerr;
-extern char *sys_errlist[];
-extern char *sys_siglist[];
-
extern char registers[];
/* Hook for `exec_file_command' command to call. */
-void (*exec_file_display_hook) () = NULL;
-
-struct section_table *core_sections, *core_sections_end;
+void (*exec_file_display_hook) PARAMS ((char *)) = NULL;
/* Binary file diddling handle for the core file. */
bfd *core_bfd = NULL;
-/* Forward decl */
-extern struct target_ops core_ops;
-
\f
-/* Discard all vestiges of any previous core file
- and mark data and stack spaces as empty. */
-
-/* ARGSUSED */
-void
-core_close (quitting)
- int quitting;
-{
- if (core_bfd) {
- free (bfd_get_filename (core_bfd));
- bfd_close (core_bfd);
- core_bfd = NULL;
-#ifdef CLEAR_SOLIB
- CLEAR_SOLIB ();
-#endif
- }
-}
-
-/* This routine opens and sets up the core file bfd */
-
-void
-core_open (filename, from_tty)
- char *filename;
- int from_tty;
-{
- char *p;
- int siggy;
- struct cleanup *old_chain;
- char *temp;
- bfd *temp_bfd;
- int ontop;
-
- 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);
- free (filename);
- filename = temp;
- }
-
- old_chain = make_cleanup (free, filename);
- temp_bfd = bfd_openr (filename, NULL);
- if (temp_bfd == NULL)
- {
- perror_with_name (filename);
- }
-
- if (!bfd_check_format (temp_bfd, bfd_core))
- {
- bfd_close (temp_bfd);
- error ("\"%s\" does not appear to be a core dump", filename);
- }
-
- /* 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_sections, &core_sections_end))
- error ("Can't find sections in `%s': %s", bfd_get_filename(core_bfd),
- bfd_errmsg (bfd_error));
-
- ontop = !push_target (&core_ops);
- make_cleanup (unpush_target, &core_ops);
-
- p = bfd_core_file_failing_command (core_bfd);
- if (p)
- printf ("Core file invoked as `%s'.\n", p);
-
- siggy = bfd_core_file_failing_signal (core_bfd);
- if (siggy > 0)
- printf ("Program terminated with signal %d, %s.\n", siggy,
- siggy < NSIG ? sys_siglist[siggy] : "(undocumented)");
-
- if (ontop) {
- /* Fetch all registers from core file */
- target_fetch_registers (-1);
- /* Add symbols for any shared libraries that were in use */
-#ifdef SOLIB_ADD
- SOLIB_ADD (NULL, from_tty);
-#endif
- /* Now, set up the frame cache, and print the top of stack */
- set_current_frame ( create_new_frame (read_register (FP_REGNUM),
- read_pc ()));
- select_frame (get_current_frame (), 0);
- print_sel_frame (0); /* Print the top frame and source line */
- } else {
- printf (
-"Warning: you won't be able to access this core file until you terminate\n\
-your %s; do ``info files''\n", current_target->to_longname);
- }
-
- discard_cleanups (old_chain);
-}
-
-void
-core_detach (args, from_tty)
- char *args;
- int from_tty;
-{
- if (args)
- error ("Too many arguments");
- unpush_target (&core_ops);
- if (from_tty)
- printf ("No core file now.\n");
-}
-
/* Backward compatability with old way of specifying core files. */
void
char *filename;
int from_tty;
{
+ struct target_ops *t;
dont_repeat (); /* Either way, seems bogus. */
- if (!filename)
- core_detach (filename, from_tty);
+
+ t = find_core_target ();
+ if (t != NULL)
+ if (!filename)
+ (t->to_detach) (filename, from_tty);
+ else
+ (t->to_open) (filename, from_tty);
else
- core_open (filename, from_tty);
+ error ("unimplemented: core files");
}
\f
void
specify_exec_file_hook (hook)
- void (*hook) ();
+ void (*hook) PARAMS ((char *));
{
exec_file_display_hook = hook;
}
}
\f
/* If we have both a core file and an exec file,
- print a warning if they don't go together.
- This should really check that the core file came
- from that exec file, but I don't know how to do it. */
+ print a warning if they don't go together. */
void
validate_files ()
{
if (exec_bfd && core_bfd)
{
- if (core_file_matches_executable_p (core_bfd, exec_bfd))
- printf ("Warning: core file does not match specified executable file.\n");
+ if (!core_file_matches_executable_p (core_bfd, exec_bfd))
+ warning ("core file may not match specified executable file.");
else if (bfd_get_mtime(exec_bfd) > bfd_get_mtime(core_bfd))
- printf ("Warning: exec file is newer than core file.\n");
+ warning ("exec file is newer than core file.");
}
}
return NULL;
}
-static void
-core_files_info ()
-{
- struct section_table *p;
-
- printf ("\tCore file `%s'.\n", bfd_get_filename(core_bfd));
-
- for (p = core_sections; p < core_sections_end; p++)
- printf("\tcore file from 0x%08x to 0x%08x is %s\n",
- p->addr, p->endaddr,
- bfd_section_name (core_bfd, p->sec_ptr));
-}
\f
+/* Report a memory error with error(). */
+
void
memory_error (status, memaddr)
int status;
{
/* Actually, address between memaddr and memaddr + len
was out of bounds. */
- error ("Cannot access memory at address 0x%x.", memaddr);
+ error ("Cannot access memory at address %s.", local_hex_string(memaddr));
}
else
{
- if (status >= sys_nerr || status < 0)
- error ("Error accessing memory address 0x%x: unknown error (%d).",
- memaddr, status);
- else
- error ("Error accessing memory address 0x%x: %s.",
- memaddr, sys_errlist[status]);
+ error ("Error accessing memory address %s: %s.",
+ local_hex_string (memaddr), safe_strerror (status));
}
}
return -1; /* for lint */
}
\f
-/* Read or write the core file.
-
- Args are address within core file, address within gdb address-space,
- length, and a flag indicating whether to read or write.
-
- Result is a length:
-
- 0: We cannot handle this address and length.
- > 0: We have handled N bytes starting at this address.
- (If N == length, we did it all.) We might be able
- to handle more bytes beyond this length, but no
- promises.
- < 0: We cannot handle this address, but if somebody
- else handles (-N) bytes, we can start from there.
-
- The actual work is done by xfer_memory in exec.c, which we share
- in common with exec_xfer_memory(). */
-
-static int
-core_xfer_memory (memaddr, myaddr, len, write)
- CORE_ADDR memaddr;
- char *myaddr;
- int len;
- int write;
-{
- int res;
- res = xfer_memory (memaddr, myaddr, len, write,
- core_bfd, core_sections, core_sections_end);
-#ifdef SOLIB_XFER_MEMORY
- if (res == 0)
- res = SOLIB_XFER_MEMORY (memaddr, myaddr, len, write);
-#endif
- return res;
-}
-\f
-/* 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;
-
- reg_sec = bfd_get_section_by_name (core_bfd, ".reg");
- size = bfd_section_size (core_bfd, reg_sec);
- the_regs = alloca (size);
- if (bfd_get_section_contents (core_bfd, reg_sec, the_regs,
- (unsigned)0, size))
- {
- fetch_core_registers (the_regs, size, 0);
- }
- else
- {
- fprintf (stderr, "Couldn't fetch registers from core file: %s\n",
- bfd_errmsg (bfd_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 (bfd_get_section_contents (core_bfd, reg_sec, the_regs,
- (unsigned)0, size))
- {
- fetch_core_registers (the_regs, size, 2);
- }
- else
- {
- fprintf (stderr, "Couldn't fetch register set 2 from core file: %s\n",
- bfd_errmsg (bfd_error));
- }
- }
- registers_fetched();
-}
-\f
-struct target_ops core_ops = {
- "core", "Local core dump file",
- "Use a core file as a target. Specify the filename of the core file.",
- core_open, core_close,
- child_attach, core_detach, 0, 0, /* resume, wait */
- get_core_registers,
- 0, 0, 0, 0, /* store_regs, prepare_to_store, conv_to, conv_from */
- core_xfer_memory, core_files_info,
- 0, 0, /* core_insert_breakpoint, core_remove_breakpoint, */
- 0, 0, 0, 0, 0, /* terminal stuff */
- 0, 0, 0, 0, 0, /* kill, load, add_syms, call fn, lookup sym */
- child_create_inferior, 0, /* mourn_inferior */
- core_stratum, 0, /* next */
- 0, 1, 1, 1, 0, /* all mem, mem, stack, regs, exec */
- OPS_MAGIC, /* Always the last thing */
-};
-
void
_initialize_core()
{
"Use FILE as core dump for examining memory and registers.\n\
No arg means have no core file. This command has been superseded by the\n\
`target core' and `detach' commands.");
- add_target (&core_ops);
+
}
projects / deliverable / binutils-gdb.git / blobdiff