-/* 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, 1993, 1994
+ Free Software Foundation, Inc.
This file is part of GDB.
-GDB is free software; you can redistribute it and/or modify
+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 1, or (at your option)
-any later version.
+the Free Software Foundation; either version 2 of the License, or
+(at your option) any later version.
-GDB is distributed in the hope that it will be useful,
+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 GDB; see the file COPYING. If not, write to
-the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
+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 <string.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 "command.h"
+#include "gdbcmd.h"
#include "bfd.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[];
+#include "dis-asm.h"
+#include "language.h"
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. */
-
-void
-core_close (quitting)
- int quitting;
-{
- if (core_bfd) {
- free (bfd_get_filename (core_bfd));
- bfd_close (core_bfd);
- core_bfd = NULL;
- }
-}
-
-/* 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;
-
- 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);
-
- 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);
- set_current_frame ( create_new_frame (read_register (FP_REGNUM),
- read_pc ()));
- select_frame (get_current_frame (), 0);
- /* FIXME, handle shared library reading here. */
- 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 ("GDB can't read core files on this machine.");
}
\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;
CORE_ADDR memaddr;
{
-
if (status == EIO)
{
/* Actually, address between memaddr and memaddr + len
was out of bounds. */
- error ("Cannot access memory: address 0x%x out of bounds.", memaddr);
+ 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);
}
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_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);
}
}
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);
+}
+
/* Same as target_write_memory, but report an error if can't write. */
void
write_memory (memaddr, myaddr, len)
/* Read an integer from debugged memory, given address and number of bytes. */
-long
+LONGEST
read_memory_integer (memaddr, len)
CORE_ADDR memaddr;
int len;
{
- char cbuf;
- short sbuf;
- int ibuf;
- long lbuf;
+ char buf[sizeof (LONGEST)];
- if (len == sizeof (char))
- {
- read_memory (memaddr, &cbuf, len);
- return cbuf;
- }
- if (len == sizeof (short))
- {
- read_memory (memaddr, (char *)&sbuf, len);
- SWAP_TARGET_AND_HOST (&sbuf, sizeof (short));
- return sbuf;
- }
- if (len == sizeof (int))
- {
- read_memory (memaddr, (char *)&ibuf, len);
- SWAP_TARGET_AND_HOST (&ibuf, sizeof (int));
- return ibuf;
- }
- if (len == sizeof (lbuf))
- {
- read_memory (memaddr, (char *)&lbuf, len);
- SWAP_TARGET_AND_HOST (&lbuf, sizeof (lbuf));
- return lbuf;
- }
- error ("Cannot handle integers of %d bytes.", len);
- return -1; /* for lint */
+ read_memory (memaddr, buf, len);
+ return extract_signed_integer (buf, len);
}
-\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)
+unsigned LONGEST
+read_memory_unsigned_integer (memaddr, len)
CORE_ADDR memaddr;
- char *myaddr;
int len;
- int write;
{
- return xfer_memory (memaddr, myaddr, len, write,
- core_bfd, core_sections, core_sections_end);
+ char buf[sizeof (unsigned LONGEST)];
+
+ read_memory (memaddr, buf, len);
+ return extract_unsigned_integer (buf, len);
}
\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. */
+#if 0
+/* Enable after 4.12. It is not tested. */
-static int
-get_core_registers (regno)
- int regno;
+/* 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;
{
- 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))
+ int i;
+ CORE_ADDR curaddr = startaddr;
+
+ while (curaddr >= lorange && curaddr < hirange)
{
- fetch_core_registers (the_regs, size, 0);
+ 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 */
+\f
+/* 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
- {
- fprintf (stderr, "Couldn't fetch registers from core file: %s\n",
- bfd_errmsg (bfd_error));
- }
+ gnutarget = gnutarget_string;
+}
- /* 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();
- return 0; /* FIXME, what result goes here? */
+/* 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);
}
-\f
-struct target_ops core_ops = {
- "core", "Local core dump 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()
{
-
- add_com ("core-file", class_files, core_file_command,
- "Use FILE as core dump for examining memory and registers.\n\
+ 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\
No arg means have no core file. This command has been superseded by the\n\
-`target core' and `detach' commands.");
- add_target (&core_ops);
+`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");
}
projects / deliverable / binutils-gdb.git / blobdiff