/* Core dump and executable file functions above target vector, for GDB.
- Copyright (C) 1986-1987, 1989, 1991-1994, 1996-2001, 2003, 2006-2012
- Free Software Foundation, Inc.
+ Copyright (C) 1986-2020 Free Software Foundation, Inc.
This file is part of GDB.
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 "inferior.h"
#include "target.h"
#include "gdbcore.h"
#include "dis-asm.h"
-#include "gdb_stat.h"
+#include <sys/stat.h>
#include "completer.h"
-#include "exceptions.h"
-
-/* Local function declarations. */
-
-extern void _initialize_core (void);
-static void call_extra_exec_file_hooks (char *filename);
+#include "observable.h"
+#include "cli/cli-utils.h"
+#include "gdbarch.h"
/* 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
only one hook could be set, and which called
deprecated_exec_file_display_hook directly. */
-typedef void (*hook_type) (char *);
+typedef void (*hook_type) (const char *);
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 (if included for this gdb target). */
-
-struct target_ops *core_target;
-\f
-
-/* Backward compatability with old way of specifying core files. */
-
-void
-core_file_command (char *filename, int from_tty)
-{
- dont_repeat (); /* Either way, seems bogus. */
-
- if (core_target == NULL)
- error (_("GDB can't read core files on this machine."));
-
- if (!filename)
- (core_target->to_detach) (core_target, filename, from_tty);
- else
- (core_target->to_open) (filename, from_tty);
-}
\f
/* If there are two or more functions that wish to hook into
functions. */
static void
-call_extra_exec_file_hooks (char *filename)
+call_extra_exec_file_hooks (const char *filename)
{
int i;
This is called from the x-window display code. */
void
-specify_exec_file_hook (void (*hook) (char *))
+specify_exec_file_hook (void (*hook) (const char *))
{
hook_type *new_array;
{
/* 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 = XNEW (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;
void
reopen_exec_file (void)
{
- char *filename;
int res;
struct stat st;
- struct cleanup *cleanups;
/* 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 = xstrdup (bfd_get_filename (exec_bfd));
- cleanups = make_cleanup (xfree, filename);
- res = stat (filename, &st);
+ std::string filename = bfd_get_filename (exec_bfd);
+ res = stat (filename.c_str (), &st);
- if (exec_bfd_mtime && exec_bfd_mtime != st.st_mtime)
- exec_file_attach (filename, 0);
+ if (res == 0 && exec_bfd_mtime && exec_bfd_mtime != st.st_mtime)
+ exec_file_attach (filename.c_str (), 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,
}
}
-/* 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. */
+/* See gdbsupport/common-inferior.h. */
-char *
+const char *
get_exec_file (int err)
{
- if (exec_bfd)
- return bfd_get_filename (exec_bfd);
+ if (exec_filename)
+ return exec_filename;
if (!err)
return NULL;
error (_("No executable file specified.\n\
Use the \"file\" or \"exec-file\" command."));
- return NULL;
}
\f
-/* Report a memory error by throwing a MEMORY_ERROR error. */
-
-void
-memory_error (int status, CORE_ADDR memaddr)
+std::string
+memory_error_message (enum target_xfer_status err,
+ struct gdbarch *gdbarch, CORE_ADDR memaddr)
{
- if (status == EIO)
- /* Actually, address between memaddr and memaddr + len was out of
- bounds. */
- throw_error (MEMORY_ERROR,
- _("Cannot access memory at address %s"),
- paddress (target_gdbarch, memaddr));
- else
- throw_error (MEMORY_ERROR,
- _("Error accessing memory address %s: %s."),
- paddress (target_gdbarch, memaddr),
- safe_strerror (status));
+ switch (err)
+ {
+ case TARGET_XFER_E_IO:
+ /* Actually, address between memaddr and memaddr + len was out of
+ bounds. */
+ return string_printf (_("Cannot access memory at address %s"),
+ paddress (gdbarch, memaddr));
+ case TARGET_XFER_UNAVAILABLE:
+ return string_printf (_("Memory at address %s unavailable."),
+ paddress (gdbarch, memaddr));
+ default:
+ internal_error (__FILE__, __LINE__,
+ "unhandled target_xfer_status: %s (%s)",
+ target_xfer_status_to_string (err),
+ plongest (err));
+ }
}
-/* Same as target_read_memory, but report an error if can't read. */
+/* Report a memory error by throwing a suitable exception. */
void
-read_memory (CORE_ADDR memaddr, gdb_byte *myaddr, int len)
+memory_error (enum target_xfer_status err, CORE_ADDR memaddr)
{
- int status;
+ enum errors exception = GDB_NO_ERROR;
- status = target_read_memory (memaddr, myaddr, len);
- if (status != 0)
- memory_error (status, memaddr);
+ /* Build error string. */
+ std::string str = memory_error_message (err, target_gdbarch (), memaddr);
+
+ /* Choose the right error to throw. */
+ switch (err)
+ {
+ case TARGET_XFER_E_IO:
+ exception = MEMORY_ERROR;
+ break;
+ case TARGET_XFER_UNAVAILABLE:
+ exception = NOT_AVAILABLE_ERROR;
+ break;
+ }
+
+ /* Throw it. */
+ throw_error (exception, ("%s"), str.c_str ());
}
-/* Same as target_read_stack, but report an error if can't read. */
+/* Helper function. */
-void
-read_stack (CORE_ADDR memaddr, gdb_byte *myaddr, int len)
+static void
+read_memory_object (enum target_object object, CORE_ADDR memaddr,
+ gdb_byte *myaddr, ssize_t len)
{
- int status;
+ ULONGEST xfered = 0;
- status = target_read_stack (memaddr, myaddr, len);
- if (status != 0)
- memory_error (status, memaddr);
+ while (xfered < len)
+ {
+ enum target_xfer_status status;
+ ULONGEST xfered_len;
+
+ status = target_xfer_partial (current_top_target (), object, NULL,
+ myaddr + xfered, NULL,
+ memaddr + xfered, len - xfered,
+ &xfered_len);
+
+ if (status != TARGET_XFER_OK)
+ memory_error (status == TARGET_XFER_EOF ? TARGET_XFER_E_IO : status,
+ memaddr + xfered);
+
+ xfered += xfered_len;
+ QUIT;
+ }
}
-/* 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. */
+/* Same as target_read_memory, but report an error if can't read. */
-struct captured_read_memory_integer_arguments
+void
+read_memory (CORE_ADDR memaddr, gdb_byte *myaddr, ssize_t len)
{
- 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)
+ read_memory_object (TARGET_OBJECT_MEMORY, memaddr, myaddr, len);
+}
+
+/* Same as target_read_stack, but report an error if can't read. */
+
+void
+read_stack (CORE_ADDR memaddr, gdb_byte *myaddr, ssize_t len)
{
- 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;
+ read_memory_object (TARGET_OBJECT_STACK_MEMORY, memaddr, myaddr, len);
+}
- args->result = read_memory_integer (memaddr, len, byte_order);
+/* Same as target_read_code, but report an error if can't read. */
- return 1;
+void
+read_code (CORE_ADDR memaddr, gdb_byte *myaddr, ssize_t len)
+{
+ read_memory_object (TARGET_OBJECT_CODE_MEMORY, memaddr, myaddr, len);
}
/* Read memory at MEMADDR of length LEN and put the contents in
enum bfd_endian byte_order,
LONGEST *return_value)
{
- int status;
- struct captured_read_memory_integer_arguments args;
+ gdb_byte buf[sizeof (LONGEST)];
+
+ if (target_read_memory (memaddr, buf, len))
+ return 0;
+
+ *return_value = extract_signed_integer (buf, 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. */
- args.memaddr = memaddr;
- args.len = len;
- args.byte_order = byte_order;
+int
+safe_read_memory_unsigned_integer (CORE_ADDR memaddr, int len,
+ enum bfd_endian byte_order,
+ ULONGEST *return_value)
+{
+ gdb_byte buf[sizeof (ULONGEST)];
- status = catch_errors (do_captured_read_memory_integer, &args,
- "", RETURN_MASK_ALL);
- if (status)
- *return_value = args.result;
+ if (target_read_memory (memaddr, buf, len))
+ return 0;
- return status;
+ *return_value = extract_unsigned_integer (buf, len, byte_order);
+ return 1;
}
LONGEST
return extract_unsigned_integer (buf, len, byte_order);
}
+LONGEST
+read_code_integer (CORE_ADDR memaddr, int len,
+ enum bfd_endian byte_order)
+{
+ gdb_byte buf[sizeof (LONGEST)];
+
+ read_code (memaddr, buf, len);
+ return extract_signed_integer (buf, len, byte_order);
+}
+
+ULONGEST
+read_code_unsigned_integer (CORE_ADDR memaddr, int len,
+ enum bfd_endian byte_order)
+{
+ gdb_byte buf[sizeof (ULONGEST)];
+
+ read_code (memaddr, buf, len);
+ return extract_unsigned_integer (buf, len, byte_order);
+}
+
void
read_memory_string (CORE_ADDR memaddr, char *buffer, int max_len)
{
cnt = max_len - (cp - buffer);
if (cnt > 8)
cnt = 8;
- read_memory (memaddr + (int) (cp - buffer), cp, cnt);
+ read_memory (memaddr + (int) (cp - buffer), (gdb_byte *) cp, cnt);
for (i = 0; i < cnt && *cp; i++, cp++)
; /* null body */
CORE_ADDR
read_memory_typed_address (CORE_ADDR addr, struct type *type)
{
- gdb_byte *buf = alloca (TYPE_LENGTH (type));
+ gdb_byte *buf = (gdb_byte *) 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. */
+/* See gdbcore.h. */
+
void
write_memory (CORE_ADDR memaddr,
- const bfd_byte *myaddr, int len)
+ const bfd_byte *myaddr, ssize_t len)
{
int status;
status = target_write_memory (memaddr, myaddr, len);
if (status != 0)
- memory_error (status, memaddr);
+ memory_error (TARGET_XFER_E_IO, memaddr);
+}
+
+/* Same as write_memory, but notify 'memory_changed' observers. */
+
+void
+write_memory_with_notification (CORE_ADDR memaddr, const bfd_byte *myaddr,
+ ssize_t len)
+{
+ write_memory (memaddr, myaddr, len);
+ gdb::observers::memory_changed.notify (current_inferior (), memaddr, len, myaddr);
}
/* Store VALUE at ADDR in the inferior as a LEN-byte unsigned
enum bfd_endian byte_order,
ULONGEST value)
{
- gdb_byte *buf = alloca (len);
+ gdb_byte *buf = (gdb_byte *) alloca (len);
store_unsigned_integer (buf, len, byte_order, value);
write_memory (addr, buf, len);
enum bfd_endian byte_order,
LONGEST value)
{
- gdb_byte *buf = alloca (len);
+ gdb_byte *buf = (gdb_byte *) alloca (len);
store_signed_integer (buf, len, byte_order, value);
write_memory (addr, buf, len);
\f
/* The current default bfd target. Points to storage allocated for
gnutarget_string. */
-char *gnutarget;
+const char *gnutarget;
/* Same thing, except it is "auto" not NULL for the default case. */
static char *gnutarget_string;
_("The current BFD target is \"%s\".\n"), value);
}
-static void set_gnutarget_command (char *, int,
- struct cmd_list_element *);
-
static void
-set_gnutarget_command (char *ignore, int from_tty,
+set_gnutarget_command (const char *ignore, int from_tty,
struct cmd_list_element *c)
{
+ 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 void
+complete_set_gnutarget (struct cmd_list_element *cmd,
+ completion_tracker &tracker,
+ 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 = XRESIZEVEC (const char *, bfd_targets, last + 2);
+ bfd_targets[last] = "auto";
+ bfd_targets[last + 1] = NULL;
+ }
+
+ complete_on_enum (tracker, bfd_targets, text, word);
+}
+
/* Set the gnutarget. */
void
-set_gnutarget (char *newtarget)
+set_gnutarget (const char *newtarget)
{
- if (gnutarget_string != NULL)
- xfree (gnutarget_string);
+ xfree (gnutarget_string);
gnutarget_string = xstrdup (newtarget);
set_gnutarget_command (NULL, 0, NULL);
}
+void _initialize_core ();
void
-_initialize_core (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\
+Usage: core-file FILE\n\
No arg means have no core file. This command has been superseded by the\n\
`target core' and `detach' commands."), &cmdlist);
set_cmd_completer (c, filename_completer);
- add_setshow_string_noescape_cmd ("gnutarget", class_files,
- &gnutarget_string, _("\
+ 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_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"));
projects / deliverable / binutils-gdb.git / blobdiff