/* 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.
+ Copyright (C) 1986-2013 Free Software Foundation, Inc.
-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 file is part of GDB.
-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 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 3 of the License, or
+ (at your option) any later version.
-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. */
+ 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, see <http://www.gnu.org/licenses/>. */
#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 "target.h"
#include "gdbcore.h"
#include "dis-asm.h"
-#include "language.h"
#include "gdb_stat.h"
-
-extern char registers[];
+#include "completer.h"
+#include "exceptions.h"
+#include "observer.h"
+#include "cli/cli-utils.h"
/* Local function declarations. */
-static void call_extra_exec_file_hooks PARAMS ((char *filename));
+extern void _initialize_core (void);
+static void call_extra_exec_file_hooks (char *filename);
-/* You can have any number of hooks for `exec_file_command' command to call.
- If there's only one hook, it is set in exec_file_display hook.
- If there are two or more hooks, they are set in exec_file_extra_hooks[],
- and exec_file_display_hook is set to a function that calls all of them.
- This extra complexity is needed to preserve compatibility with
- old code that assumed that only one hook could be set, and which called
- exec_file_display_hook directly. */
+/* You can have any number of hooks for `exec_file_command' command to
+ call. If there's only one hook, it is set in exec_file_display
+ hook. If there are two or more hooks, they are set in
+ exec_file_extra_hooks[], and deprecated_exec_file_display_hook is
+ set to a function that calls all of them. This extra complexity is
+ needed to preserve compatibility with old code that assumed that
+ only one hook could be set, and which called
+ deprecated_exec_file_display_hook directly. */
-typedef void (*hook_type) PARAMS ((char *));
+typedef void (*hook_type) (char *);
-hook_type exec_file_display_hook; /* the original hook */
-static hook_type *exec_file_extra_hooks; /* array of additional hooks */
-static int exec_file_hook_count = 0; /* size of array */
+hook_type deprecated_exec_file_display_hook; /* The original hook. */
+static hook_type *exec_file_extra_hooks; /* Array of additional
+ hooks. */
+static int exec_file_hook_count = 0; /* Size of array. */
/* Binary file diddling handle for the core file. */
bfd *core_bfd = NULL;
+/* corelow.c target. It is never NULL after GDB initialization. */
+
+struct target_ops *core_target;
\f
+
/* Backward compatability with old way of specifying core files. */
void
-core_file_command (filename, from_tty)
- char *filename;
- int from_tty;
+core_file_command (char *filename, int from_tty)
{
- struct target_ops *t;
+ dont_repeat (); /* Either way, seems bogus. */
- dont_repeat (); /* Either way, seems bogus. */
+ gdb_assert (core_target != NULL);
- t = find_core_target ();
- if (t != NULL)
- if (!filename)
- (t->to_detach) (filename, from_tty);
- else
- (t->to_open) (filename, from_tty);
+ if (!filename)
+ (core_target->to_detach) (core_target, filename, from_tty);
else
- error ("GDB can't read core files on this machine.");
+ (core_target->to_open) (filename, from_tty);
}
-
\f
-/* If there are two or more functions that wish to hook into exec_file_command,
- * this function will call all of the hook functions. */
+
+/* If there are two or more functions that wish to hook into
+ exec_file_command, this function will call all of the hook
+ functions. */
static void
-call_extra_exec_file_hooks (filename)
- char *filename;
+call_extra_exec_file_hooks (char *filename)
{
int i;
for (i = 0; i < exec_file_hook_count; i++)
- (*exec_file_extra_hooks[i])(filename);
+ (*exec_file_extra_hooks[i]) (filename);
}
/* 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 *));
+specify_exec_file_hook (void (*hook) (char *))
{
hook_type *new_array;
- if (exec_file_display_hook != NULL)
+ if (deprecated_exec_file_display_hook != NULL)
{
/* There's already a hook installed. Arrange to have both it
- * and the subsequent hooks called. */
+ and the subsequent hooks called. */
if (exec_file_hook_count == 0)
{
- /* If this is the first extra hook, initialize the hook array. */
- exec_file_extra_hooks = (hook_type *) xmalloc (sizeof(hook_type));
- exec_file_extra_hooks[0] = exec_file_display_hook;
- exec_file_display_hook = call_extra_exec_file_hooks;
+ /* If this is the first extra hook, initialize the hook
+ array. */
+ exec_file_extra_hooks = (hook_type *)
+ xmalloc (sizeof (hook_type));
+ exec_file_extra_hooks[0] = deprecated_exec_file_display_hook;
+ deprecated_exec_file_display_hook = call_extra_exec_file_hooks;
exec_file_hook_count = 1;
}
Yes, it's inefficient to grow it by one each time but since
this is hardly ever called it's not a big deal. */
exec_file_hook_count++;
- new_array =
- (hook_type *) xrealloc (exec_file_extra_hooks,
- exec_file_hook_count * sizeof(hook_type));
+ new_array = (hook_type *)
+ xrealloc (exec_file_extra_hooks,
+ exec_file_hook_count * sizeof (hook_type));
exec_file_extra_hooks = new_array;
exec_file_extra_hooks[exec_file_hook_count - 1] = hook;
}
else
- 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 ()
-{
-#if 0 /* FIXME */
- if (exec_bfd)
- bfd_tempclose (exec_bfd);
-#endif
+ deprecated_exec_file_display_hook = hook;
}
void
-reopen_exec_file ()
+reopen_exec_file (void)
{
-#if 0 /* FIXME */
- if (exec_bfd)
- bfd_reopen (exec_bfd);
-#else
char *filename;
int res;
struct stat st;
- long mtime;
+ struct cleanup *cleanups;
- /* Don't do anything if the current target isn't exec. */
- if (exec_bfd == NULL || strcmp (target_shortname, "exec") != 0)
+ /* Don't do anything if there isn't an exec file. */
+ if (exec_bfd == NULL)
return;
-
- /* If the timestamp of the exec file has changed, reopen it. */
- filename = strdup (bfd_get_filename (exec_bfd));
- make_cleanup (free, filename);
- mtime = bfd_get_mtime(exec_bfd);
+
+ /* If the timestamp of the exec file has changed, reopen it. */
+ filename = xstrdup (bfd_get_filename (exec_bfd));
+ cleanups = make_cleanup (xfree, filename);
res = stat (filename, &st);
- if (mtime && mtime != st.st_mtime)
- exec_file_command (filename, 0);
-#endif
+ if (exec_bfd_mtime && exec_bfd_mtime != st.st_mtime)
+ exec_file_attach (filename, 0);
+ else
+ /* If we accessed the file since last opening it, close it now;
+ this stops GDB from holding the executable open after it
+ exits. */
+ bfd_cache_close_all ();
+
+ do_cleanups (cleanups);
}
\f
/* If we have both a core file and an exec file,
print a warning if they don't go together. */
void
-validate_files ()
+validate_files (void)
{
if (exec_bfd && core_bfd)
{
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))
- warning ("exec file is newer than core file.");
+ warning (_("core file may not match specified executable file."));
+ else if (bfd_get_mtime (exec_bfd) > bfd_get_mtime (core_bfd))
+ warning (_("exec file is newer than core file."));
}
}
otherwise return 0 in that case. */
char *
-get_exec_file (err)
- int err;
+get_exec_file (int err)
{
- if (exec_bfd) return bfd_get_filename(exec_bfd);
- if (!err) return NULL;
+ if (exec_filename)
+ return exec_filename;
+ if (!err)
+ return NULL;
- error ("No executable file specified.\n\
-Use the \"file\" or \"exec-file\" command.");
+ error (_("No executable file specified.\n\
+Use the \"file\" or \"exec-file\" command."));
return NULL;
}
-
\f
-/* Report a memory error with error(). */
-void
-memory_error (status, memaddr)
- int status;
- CORE_ADDR memaddr;
+char *
+memory_error_message (enum target_xfer_error err,
+ struct gdbarch *gdbarch, CORE_ADDR memaddr)
{
- if (status == EIO)
+ switch (err)
{
- /* 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);
+ case TARGET_XFER_E_IO:
+ /* Actually, address between memaddr and memaddr + len was out of
+ bounds. */
+ return xstrprintf (_("Cannot access memory at address %s"),
+ paddress (gdbarch, memaddr));
+ case TARGET_XFER_E_UNAVAILABLE:
+ return xstrprintf (_("Memory at address %s unavailable."),
+ paddress (gdbarch, memaddr));
+ default:
+ internal_error (__FILE__, __LINE__,
+ "unhandled target_xfer_error: %s (%s)",
+ target_xfer_error_to_string (err),
+ plongest (err));
}
- else
+}
+
+/* Report a memory error by throwing a suitable exception. */
+
+void
+memory_error (enum target_xfer_error err, CORE_ADDR memaddr)
+{
+ char *str;
+
+ /* Build error string. */
+ str = memory_error_message (err, target_gdbarch (), memaddr);
+ make_cleanup (xfree, str);
+
+ /* Choose the right error to throw. */
+ switch (err)
{
- 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);
+ case TARGET_XFER_E_IO:
+ err = MEMORY_ERROR;
+ break;
+ case TARGET_XFER_E_UNAVAILABLE:
+ err = NOT_AVAILABLE_ERROR;
+ break;
}
+
+ /* Throw it. */
+ throw_error (err, ("%s"), str);
}
/* 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;
+read_memory (CORE_ADDR memaddr, gdb_byte *myaddr, ssize_t len)
{
- int status;
- status = target_read_memory (memaddr, myaddr, len);
- if (status != 0)
- memory_error (status, memaddr);
+ LONGEST xfered = 0;
+
+ while (xfered < len)
+ {
+ LONGEST xfer = target_xfer_partial (current_target.beneath,
+ TARGET_OBJECT_MEMORY, NULL,
+ myaddr + xfered, NULL,
+ memaddr + xfered, len - xfered);
+
+ if (xfer == 0)
+ memory_error (TARGET_XFER_E_IO, memaddr + xfered);
+ if (xfer < 0)
+ memory_error (xfer, memaddr + xfered);
+ xfered += xfer;
+ QUIT;
+ }
}
+/* Same as target_read_stack, but report an error if can't read. */
+
void
-read_memory_section (memaddr, myaddr, len, bfd_section)
- CORE_ADDR memaddr;
- char *myaddr;
- int len;
- asection *bfd_section;
+read_stack (CORE_ADDR memaddr, gdb_byte *myaddr, ssize_t len)
{
int status;
- status = target_read_memory_section (memaddr, myaddr, len, bfd_section);
+
+ status = target_read_stack (memaddr, myaddr, len);
if (status != 0)
memory_error (status, memaddr);
}
-/* Like target_read_memory, but slightly different parameters. */
+/* Argument / return result struct for use with
+ do_captured_read_memory_integer(). MEMADDR and LEN are filled in
+ by gdb_read_memory_integer(). RESULT is the contents that were
+ successfully read from MEMADDR of length LEN. */
+
+struct captured_read_memory_integer_arguments
+{
+ CORE_ADDR memaddr;
+ int len;
+ enum bfd_endian byte_order;
+ LONGEST result;
+};
+
+/* Helper function for gdb_read_memory_integer(). DATA must be a
+ pointer to a captured_read_memory_integer_arguments struct.
+ Return 1 if successful. Note that the catch_errors() interface
+ will return 0 if an error occurred while reading memory. This
+ choice of return code is so that we can distinguish between
+ success and failure. */
+
+static int
+do_captured_read_memory_integer (void *data)
+{
+ struct captured_read_memory_integer_arguments *args
+ = (struct captured_read_memory_integer_arguments*) data;
+ CORE_ADDR memaddr = args->memaddr;
+ int len = args->len;
+ enum bfd_endian byte_order = args->byte_order;
+
+ args->result = read_memory_integer (memaddr, len, byte_order);
+
+ return 1;
+}
+
+/* Read memory at MEMADDR of length LEN and put the contents in
+ RETURN_VALUE. Return 0 if MEMADDR couldn't be read and non-zero
+ if successful. */
int
-dis_asm_read_memory (memaddr, myaddr, len, info)
- bfd_vma memaddr;
- bfd_byte *myaddr;
- int len;
- disassemble_info *info;
+safe_read_memory_integer (CORE_ADDR memaddr, int len,
+ enum bfd_endian byte_order,
+ LONGEST *return_value)
{
- return target_read_memory (memaddr, (char *) myaddr, len);
+ int status;
+ struct captured_read_memory_integer_arguments args;
+
+ args.memaddr = memaddr;
+ args.len = len;
+ args.byte_order = byte_order;
+
+ status = catch_errors (do_captured_read_memory_integer, &args,
+ "", RETURN_MASK_ALL);
+ if (status)
+ *return_value = args.result;
+
+ return status;
}
-/* Like memory_error with slightly different parameters. */
-void
-dis_asm_memory_error (status, memaddr, info)
- int status;
- bfd_vma memaddr;
- disassemble_info *info;
+LONGEST
+read_memory_integer (CORE_ADDR memaddr, int len,
+ enum bfd_endian byte_order)
+{
+ gdb_byte buf[sizeof (LONGEST)];
+
+ read_memory (memaddr, buf, len);
+ return extract_signed_integer (buf, len, byte_order);
+}
+
+ULONGEST
+read_memory_unsigned_integer (CORE_ADDR memaddr, int len,
+ enum bfd_endian byte_order)
{
- memory_error (status, memaddr);
+ gdb_byte buf[sizeof (ULONGEST)];
+
+ read_memory (memaddr, buf, len);
+ return extract_unsigned_integer (buf, len, byte_order);
}
-/* Like print_address with slightly different parameters. */
void
-dis_asm_print_address (addr, info)
- bfd_vma addr;
- struct disassemble_info *info;
+read_memory_string (CORE_ADDR memaddr, char *buffer, int max_len)
{
- print_address (addr, info->stream);
+ char *cp;
+ int i;
+ int cnt;
+
+ cp = buffer;
+ while (1)
+ {
+ if (cp - buffer >= max_len)
+ {
+ buffer[max_len - 1] = '\0';
+ break;
+ }
+ cnt = max_len - (cp - buffer);
+ if (cnt > 8)
+ cnt = 8;
+ read_memory (memaddr + (int) (cp - buffer), (gdb_byte *) cp, cnt);
+ for (i = 0; i < cnt && *cp; i++, cp++)
+ ; /* null body */
+
+ if (i < cnt && !*cp)
+ break;
+ }
}
-/* Same as target_write_memory, but report an error if can't write. */
+CORE_ADDR
+read_memory_typed_address (CORE_ADDR addr, struct type *type)
+{
+ gdb_byte *buf = alloca (TYPE_LENGTH (type));
+
+ read_memory (addr, buf, TYPE_LENGTH (type));
+ return extract_typed_address (buf, type);
+}
+
+/* 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;
+write_memory (CORE_ADDR memaddr,
+ const bfd_byte *myaddr, ssize_t len)
{
int status;
memory_error (status, memaddr);
}
-/* Read an integer from debugged memory, given address and number of bytes. */
+/* Same as write_memory, but notify 'memory_changed' observers. */
-LONGEST
-read_memory_integer (memaddr, len)
- CORE_ADDR memaddr;
- int len;
+void
+write_memory_with_notification (CORE_ADDR memaddr, const bfd_byte *myaddr,
+ ssize_t len)
{
- char buf[sizeof (LONGEST)];
-
- read_memory (memaddr, buf, len);
- return extract_signed_integer (buf, len);
+ write_memory (memaddr, myaddr, len);
+ observer_notify_memory_changed (current_inferior (), memaddr, len, myaddr);
}
-ULONGEST
-read_memory_unsigned_integer (memaddr, len)
- CORE_ADDR memaddr;
- int len;
+/* Store VALUE at ADDR in the inferior as a LEN-byte unsigned
+ integer. */
+void
+write_memory_unsigned_integer (CORE_ADDR addr, int len,
+ enum bfd_endian byte_order,
+ ULONGEST value)
{
- char buf[sizeof (ULONGEST)];
+ gdb_byte *buf = alloca (len);
- read_memory (memaddr, buf, len);
- return extract_unsigned_integer (buf, len);
+ store_unsigned_integer (buf, len, byte_order, value);
+ write_memory (addr, buf, len);
}
-\f
-#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. */
+/* Store VALUE at ADDR in the inferior as a LEN-byte signed
+ integer. */
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;
+write_memory_signed_integer (CORE_ADDR addr, int len,
+ enum bfd_endian byte_order,
+ LONGEST value)
{
- int i;
- CORE_ADDR curaddr = startaddr;
+ gdb_byte *buf = alloca (len);
- 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;
+ store_signed_integer (buf, len, byte_order, value);
+ write_memory (addr, buf, len);
}
-#endif /* 0 */
\f
/* The current default bfd target. Points to storage allocated for
gnutarget_string. */
/* Same thing, except it is "auto" not NULL for the default case. */
static char *gnutarget_string;
+static void
+show_gnutarget_string (struct ui_file *file, int from_tty,
+ struct cmd_list_element *c,
+ const char *value)
+{
+ fprintf_filtered (file,
+ _("The current BFD target is \"%s\".\n"), value);
+}
-static void set_gnutarget_command
- PARAMS ((char *, int, struct cmd_list_element *));
+static void set_gnutarget_command (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;
+set_gnutarget_command (char *ignore, int from_tty,
+ struct cmd_list_element *c)
{
- if (STREQ (gnutarget_string, "auto"))
+ char *gend = gnutarget_string + strlen (gnutarget_string);
+
+ gend = remove_trailing_whitespace (gnutarget_string, gend);
+ *gend = '\0';
+
+ if (strcmp (gnutarget_string, "auto") == 0)
gnutarget = NULL;
else
gnutarget = gnutarget_string;
}
+/* A completion function for "set gnutarget". */
+
+static VEC (char_ptr) *
+complete_set_gnutarget (struct cmd_list_element *cmd,
+ const char *text, const char *word)
+{
+ static const char **bfd_targets;
+
+ if (bfd_targets == NULL)
+ {
+ int last;
+
+ bfd_targets = bfd_target_list ();
+ for (last = 0; bfd_targets[last] != NULL; ++last)
+ ;
+
+ bfd_targets = xrealloc (bfd_targets, (last + 2) * sizeof (const char **));
+ bfd_targets[last] = "auto";
+ bfd_targets[last + 1] = NULL;
+ }
+
+ return complete_on_enum (bfd_targets, text, word);
+}
+
/* Set the gnutarget. */
void
-set_gnutarget (newtarget)
- char *newtarget;
+set_gnutarget (char *newtarget)
{
if (gnutarget_string != NULL)
- free (gnutarget_string);
- gnutarget_string = savestring (newtarget, strlen (newtarget));
+ xfree (gnutarget_string);
+ gnutarget_string = xstrdup (newtarget);
set_gnutarget_command (NULL, 0, NULL);
}
void
-_initialize_core()
+_initialize_core (void)
{
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\
+
+ 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.", &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);
+`target core' and `detach' commands."), &cmdlist);
+ set_cmd_completer (c, filename_completer);
+
+
+ c = add_setshow_string_noescape_cmd ("gnutarget", class_files,
+ &gnutarget_string, _("\
+Set the current BFD target."), _("\
+Show the current BFD target."), _("\
+Use `set gnutarget auto' to specify automatic detection."),
+ set_gnutarget_command,
+ show_gnutarget_string,
+ &setlist, &showlist);
+ set_cmd_completer (c, complete_set_gnutarget);
+
+ add_alias_cmd ("g", "gnutarget", class_files, 1, &setlist);
if (getenv ("GNUTARGET"))
set_gnutarget (getenv ("GNUTARGET"));