/* Core dump and executable file functions above target vector, for GDB.
- Copyright (C) 1986, 1987, 1989, 1991, 1992, 1993, 1994, 1996, 1997, 1998,
- 1999, 2000, 2001, 2003, 2006, 2007, 2008 Free Software Foundation, Inc.
+ Copyright (C) 1986-2019 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 */
+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;
-\f
-
-/* Backward compatability with old way of specifying core files. */
-
-void
-core_file_command (char *filename, int from_tty)
-{
- struct target_ops *t;
-
- dont_repeat (); /* Either way, seems bogus. */
-
- t = find_core_target ();
- if (t == NULL)
- error (_("GDB can't read core files on this machine."));
-
- if (!filename)
- (t->to_detach) (t, filename, from_tty);
- else
- (t->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 (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));
+ /* If this is the first extra hook, initialize the hook
+ array. */
+ 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;
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;
}
deprecated_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 (void)
-{
-#if 0 /* FIXME */
- if (exec_bfd)
- bfd_tempclose (exec_bfd);
-#endif
-}
-
void
reopen_exec_file (void)
{
-#if 0 /* FIXME */
- if (exec_bfd)
- bfd_reopen (exec_bfd);
-#else
- char *filename;
int res;
struct stat st;
- long mtime;
- /* Don't do anything if there isn't an exec file. */
+ /* 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));
- make_cleanup (xfree, filename);
- res = stat (filename, &st);
+ /* If the timestamp of the exec file has changed, reopen it. */
+ 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 ();
-#endif
}
\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. */
+std::string
+memory_error_message (enum target_xfer_status err,
+ struct gdbarch *gdbarch, CORE_ADDR memaddr)
+{
+ 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));
+ }
+}
+
+/* Report a memory error by throwing a suitable exception. */
void
-memory_error (int status, CORE_ADDR memaddr)
+memory_error (enum target_xfer_status err, 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 (memaddr));
- else
- throw_error (MEMORY_ERROR,
- _("Error accessing memory address %s: %s."),
- paddress (memaddr),
- safe_strerror (status));
+ enum errors exception = GDB_NO_ERROR;
+
+ /* 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 ());
+}
+
+/* Helper function. */
+
+static void
+read_memory_object (enum target_object object, CORE_ADDR memaddr,
+ gdb_byte *myaddr, ssize_t len)
+{
+ ULONGEST xfered = 0;
+
+ 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;
+ }
}
/* Same as target_read_memory, but report an error if can't read. */
+
void
-read_memory (CORE_ADDR memaddr, gdb_byte *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);
+ read_memory_object (TARGET_OBJECT_MEMORY, memaddr, myaddr, len);
}
-/* 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_stack, but report an error if can't read. */
-struct captured_read_memory_integer_arguments
+void
+read_stack (CORE_ADDR memaddr, gdb_byte *myaddr, ssize_t len)
{
- CORE_ADDR memaddr;
- int len;
- 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_STACK_MEMORY, memaddr, myaddr, len);
+}
+
+/* Same as target_read_code, but report an error if can't read. */
+
+void
+read_code (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;
+ read_memory_object (TARGET_OBJECT_CODE_MEMORY, memaddr, myaddr, len);
+}
- args->result = read_memory_integer (memaddr, len);
+/* 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
+safe_read_memory_integer (CORE_ADDR memaddr, int len,
+ enum bfd_endian byte_order,
+ LONGEST *return_value)
+{
+ 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;
}
if successful. */
int
-safe_read_memory_integer (CORE_ADDR memaddr, int len, LONGEST *return_value)
+safe_read_memory_unsigned_integer (CORE_ADDR memaddr, int len,
+ enum bfd_endian byte_order,
+ ULONGEST *return_value)
{
- int status;
- struct captured_read_memory_integer_arguments args;
- args.memaddr = memaddr;
- args.len = len;
+ 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
-read_memory_integer (CORE_ADDR memaddr, int len)
+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);
+ return extract_signed_integer (buf, len, byte_order);
}
ULONGEST
-read_memory_unsigned_integer (CORE_ADDR memaddr, int len)
+read_memory_unsigned_integer (CORE_ADDR memaddr, int len,
+ enum bfd_endian byte_order)
{
gdb_byte buf[sizeof (ULONGEST)];
read_memory (memaddr, buf, len);
- return extract_unsigned_integer (buf, len);
+ 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
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)
+write_memory (CORE_ADDR memaddr,
+ 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);
}
-/* Store VALUE at ADDR in the inferior as a LEN-byte unsigned integer. */
+/* Same as write_memory, but notify 'memory_changed' observers. */
+
void
-write_memory_unsigned_integer (CORE_ADDR addr, int len, ULONGEST value)
+write_memory_with_notification (CORE_ADDR memaddr, const bfd_byte *myaddr,
+ ssize_t len)
{
- gdb_byte *buf = alloca (len);
- store_unsigned_integer (buf, len, value);
- write_memory (addr, buf, 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 signed integer. */
+/* Store VALUE at ADDR in the inferior as a LEN-byte unsigned
+ integer. */
void
-write_memory_signed_integer (CORE_ADDR addr, int len, LONGEST value)
+write_memory_unsigned_integer (CORE_ADDR addr, int len,
+ enum bfd_endian byte_order,
+ ULONGEST value)
{
- gdb_byte *buf = alloca (len);
- store_signed_integer (buf, len, value);
+ gdb_byte *buf = (gdb_byte *) alloca (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 (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 = (gdb_byte *) 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. */
static char *gnutarget_string;
static void
show_gnutarget_string (struct ui_file *file, int from_tty,
- struct cmd_list_element *c, const char *value)
+ struct cmd_list_element *c,
+ const char *value)
{
- fprintf_filtered (file, _("The current BFD target is \"%s\".\n"), value);
+ fprintf_filtered (file,
+ _("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, struct cmd_list_element *c)
+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);
- gnutarget_string = savestring (newtarget, strlen (newtarget));
+ gnutarget_string = xstrdup (newtarget);
set_gnutarget_command (NULL, 0, NULL);
}
_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\
+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