/* Work with executable files, for GDB.
- Copyright 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996,
- 1997, 1998, 1999, 2000, 2001, 2002, 2003 Free Software Foundation,
- Inc.
+ Copyright (C) 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997,
+ 1998, 1999, 2000, 2001, 2002, 2003, 2007, 2008, 2009
+ Free Software Foundation, Inc.
This file is part of GDB.
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
+ the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
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, write to the Free Software
- Foundation, Inc., 59 Temple Place - Suite 330,
- Boston, MA 02111-1307, USA. */
+ along with this program. If not, see <http://www.gnu.org/licenses/>. */
#include "defs.h"
#include "frame.h"
#include "completer.h"
#include "value.h"
#include "exec.h"
+#include "observer.h"
+#include "arch-utils.h"
#include <fcntl.h>
#include "readline/readline.h"
#include <ctype.h>
#include "gdb_stat.h"
-#ifndef O_BINARY
-#define O_BINARY 0
-#endif
#include "xcoffsolib.h"
static void exec_files_info (struct target_ops *);
-static int ignore (CORE_ADDR, char *);
-
static void init_exec_ops (void);
void _initialize_exec (void);
/* The Binary File Descriptor handle for the executable file. */
bfd *exec_bfd = NULL;
+long exec_bfd_mtime = 0;
/* Whether to open exec and core files read-only or read-write. */
int write_files = 0;
+static void
+show_write_files (struct ui_file *file, int from_tty,
+ struct cmd_list_element *c, const char *value)
+{
+ fprintf_filtered (file, _("Writing into executable and core files is %s.\n"),
+ value);
+}
+
struct vmap *vmap;
-void
+static void
exec_open (char *args, int from_tty)
{
target_preopen (from_tty);
name, bfd_errmsg (bfd_get_error ()));
xfree (name);
exec_bfd = NULL;
+ exec_bfd_mtime = 0;
}
if (exec_ops.to_sections)
printf_unfiltered (_("No executable file now.\n"));
}
-/* Process the first arg in ARGS as the new exec file.
+/* Set FILENAME as the new exec file.
This function is intended to be behave essentially the same
as exec_file_command, except that the latter will detect when
given a pid but not a exec pathname, and the attach command could
figure out the pathname from the pid. (In this case, we shouldn't
ask the user whether the current target should be shut down --
- we're supplying the exec pathname late for good reason.)
-
- ARGS is assumed to be the filename. */
+ we're supplying the exec pathname late for good reason.) */
void
exec_file_attach (char *filename, int from_tty)
{
if (from_tty)
printf_unfiltered (_("No executable file now.\n"));
+
+ set_gdbarch_from_file (NULL);
}
else
{
+ struct cleanup *cleanups;
char *scratch_pathname;
int scratch_chan;
scratch_chan = openp (getenv ("PATH"), OPF_TRY_CWD_FIRST, filename,
- write_files ? O_RDWR | O_BINARY : O_RDONLY | O_BINARY, 0,
+ write_files ? O_RDWR | O_BINARY : O_RDONLY | O_BINARY,
&scratch_pathname);
#if defined(__GO32__) || defined(_WIN32) || defined(__CYGWIN__)
if (scratch_chan < 0)
char *exename = alloca (strlen (filename) + 5);
strcat (strcpy (exename, filename), ".exe");
scratch_chan = openp (getenv ("PATH"), OPF_TRY_CWD_FIRST, exename,
- write_files ? O_RDWR | O_BINARY : O_RDONLY | O_BINARY, 0,
+ write_files ? O_RDWR | O_BINARY : O_RDONLY | O_BINARY,
&scratch_pathname);
}
#endif
if (scratch_chan < 0)
perror_with_name (filename);
- exec_bfd = bfd_fdopenr (scratch_pathname, gnutarget, scratch_chan);
+ exec_bfd = bfd_fopen (scratch_pathname, gnutarget,
+ write_files ? FOPEN_RUB : FOPEN_RB,
+ scratch_chan);
if (!exec_bfd)
- error (_("\"%s\": could not open as an executable file: %s"),
- scratch_pathname, bfd_errmsg (bfd_get_error ()));
+ {
+ close (scratch_chan);
+ error (_("\"%s\": could not open as an executable file: %s"),
+ scratch_pathname, bfd_errmsg (bfd_get_error ()));
+ }
/* At this point, scratch_pathname and exec_bfd->name both point to the
same malloc'd string. However exec_close() will attempt to free it
via the exec_bfd->name pointer, so we need to make another copy and
leave exec_bfd as the new owner of the original copy. */
scratch_pathname = xstrdup (scratch_pathname);
- make_cleanup (xfree, scratch_pathname);
+ cleanups = make_cleanup (xfree, scratch_pathname);
if (!bfd_check_format (exec_bfd, bfd_object))
{
scratch_pathname, bfd_errmsg (bfd_get_error ()));
}
-#ifdef DEPRECATED_HPUX_TEXT_END
- DEPRECATED_HPUX_TEXT_END (&exec_ops);
-#endif
+ exec_bfd_mtime = bfd_get_mtime (exec_bfd);
validate_files ();
/* Tell display code (if any) about the changed file name. */
if (deprecated_exec_file_display_hook)
(*deprecated_exec_file_display_hook) (filename);
+
+ do_cleanups (cleanups);
}
bfd_cache_close_all ();
+ observer_notify_executable_changed ();
}
/* Process the first arg in ARGS as the new exec file.
{
char **argv;
char *filename;
-
- target_preopen (from_tty);
+
+ if (from_tty && target_has_execution
+ && !query (_("A program is being debugged already.\n"
+ "Are you sure you want to change the file? ")))
+ error (_("File not changed."));
if (args)
{
+ struct cleanup *cleanups;
+
/* Scan through the args and pick up the first non option arg
as the filename. */
- argv = buildargv (args);
- if (argv == NULL)
- nomem (0);
-
- make_cleanup_freeargv (argv);
+ argv = gdb_buildargv (args);
+ cleanups = make_cleanup_freeargv (argv);
for (; (*argv != NULL) && (**argv == '-'); argv++)
{;
filename = tilde_expand (*argv);
make_cleanup (xfree, filename);
exec_file_attach (filename, from_tty);
+
+ do_cleanups (cleanups);
}
else
exec_file_attach (NULL, from_tty);
add_to_section_table (bfd *abfd, struct bfd_section *asect,
void *table_pp_char)
{
- struct section_table **table_pp = (struct section_table **) table_pp_char;
+ struct target_section **table_pp = (struct target_section **) table_pp_char;
flagword aflag;
+ /* Check the section flags, but do not discard zero-length sections, since
+ some symbols may still be attached to this section. For instance, we
+ encountered on sparc-solaris 2.10 a shared library with an empty .bss
+ section to which a symbol named "_end" was attached. The address
+ of this symbol still needs to be relocated. */
aflag = bfd_get_section_flags (abfd, asect);
if (!(aflag & SEC_ALLOC))
return;
- if (0 == bfd_section_size (abfd, asect))
- return;
+
(*table_pp)->bfd = abfd;
(*table_pp)->the_bfd_section = asect;
(*table_pp)->addr = bfd_section_vma (abfd, asect);
Returns 0 if OK, 1 on error. */
int
-build_section_table (struct bfd *some_bfd, struct section_table **start,
- struct section_table **end)
+build_section_table (struct bfd *some_bfd, struct target_section **start,
+ struct target_section **end)
{
unsigned count;
count = bfd_count_sections (some_bfd);
if (*start)
xfree (* start);
- *start = (struct section_table *) xmalloc (count * sizeof (**start));
+ *start = (struct target_section *) xmalloc (count * sizeof (**start));
*end = *start;
bfd_map_over_sections (some_bfd, add_to_section_table, (char *) end);
if (*end > *start + count)
if ((bfd_get_section_flags (abfd, sect) & SEC_LOAD) == 0)
return;
- if (DEPRECATED_STREQ (bfd_section_name (abfd, sect), ".text"))
+ if (strcmp (bfd_section_name (abfd, sect), ".text") == 0)
{
vp->tstart = bfd_section_vma (abfd, sect);
vp->tend = vp->tstart + bfd_section_size (abfd, sect);
vp->tvma = bfd_section_vma (abfd, sect);
vp->toffs = sect->filepos;
}
- else if (DEPRECATED_STREQ (bfd_section_name (abfd, sect), ".data"))
+ else if (strcmp (bfd_section_name (abfd, sect), ".data") == 0)
{
vp->dstart = bfd_section_vma (abfd, sect);
vp->dend = vp->dstart + bfd_section_size (abfd, sect);
return vp;
}
\f
-/* Read or write the exec file.
+/* Read or write from BFD executable files.
- Args are address within a BFD file, address within gdb address-space,
- length, and a flag indicating whether to read or write.
+ MEMADDR is an address within the target address space, MYADDR is an
+ address within GDB address-space where data is written to, LEN is
+ length of buffer, and WRITE indicates whether to read or write.
+ SECTIONS and SECTIONS_END defines a section table holding sections
+ from possibly multiple BFDs.
+
+ If SECTION_NAME is not NULL, only access sections with that same
+ name.
Result is a length:
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 same routine is used to handle both core and exec files;
- we just tail-call it with more arguments to select between them. */
+ else handles (-N) bytes, we can start from there. */
-int
-xfer_memory (CORE_ADDR memaddr, char *myaddr, int len, int write,
- struct mem_attrib *attrib,
- struct target_ops *target)
+static int
+section_table_xfer_memory (CORE_ADDR memaddr, gdb_byte *myaddr,
+ int len, int write,
+ struct target_section *sections,
+ struct target_section *sections_end,
+ const char *section_name)
{
int res;
- struct section_table *p;
+ struct target_section *p;
CORE_ADDR nextsectaddr, memend;
- asection *section = NULL;
if (len <= 0)
internal_error (__FILE__, __LINE__, _("failed internal consistency check"));
- if (overlay_debugging)
- {
- section = find_pc_overlay (memaddr);
- if (pc_in_unmapped_range (memaddr, section))
- memaddr = overlay_mapped_address (memaddr, section);
- }
-
memend = memaddr + len;
nextsectaddr = memend;
- for (p = target->to_sections; p < target->to_sections_end; p++)
+ for (p = sections; p < sections_end; p++)
{
- if (overlay_debugging && section && p->the_bfd_section &&
- strcmp (section->name, p->the_bfd_section->name) != 0)
+ if (section_name && strcmp (section_name, p->the_bfd_section->name) != 0)
continue; /* not the section we need */
if (memaddr >= p->addr)
{
else
return -(nextsectaddr - memaddr); /* Next boundary where we can help */
}
+
+int
+section_table_xfer_memory_partial (gdb_byte *readbuf, const gdb_byte *writebuf,
+ ULONGEST offset, LONGEST len,
+ struct target_section *sections,
+ struct target_section *sections_end)
+{
+ if (readbuf != NULL)
+ return section_table_xfer_memory (offset, readbuf, len, 0,
+ sections, sections_end, NULL);
+ else
+ return section_table_xfer_memory (offset, (gdb_byte *) writebuf, len, 1,
+ sections, sections_end, NULL);
+}
+
+/* Read or write the exec file.
+
+ Args are address within a BFD 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 same routine is used to handle both core and exec files;
+ we just tail-call it with more arguments to select between them. */
+
+int
+xfer_memory (CORE_ADDR memaddr, gdb_byte *myaddr, int len, int write,
+ struct mem_attrib *attrib, struct target_ops *target)
+{
+ int res;
+ const char *section_name = NULL;
+
+ if (len <= 0)
+ internal_error (__FILE__, __LINE__, _("failed internal consistency check"));
+
+ if (overlay_debugging)
+ {
+ struct obj_section *section = find_pc_overlay (memaddr);
+
+ if (section != NULL)
+ {
+ if (pc_in_unmapped_range (memaddr, section))
+ memaddr = overlay_mapped_address (memaddr, section);
+ section_name = section->the_bfd_section->name;
+ }
+ }
+
+ return section_table_xfer_memory (memaddr, myaddr, len, write,
+ target->to_sections,
+ target->to_sections_end,
+ section_name);
+}
\f
void
print_section_info (struct target_ops *t, bfd *abfd)
{
- struct section_table *p;
- /* FIXME: 16 is not wide enough when TARGET_ADDR_BIT > 64. */
- int wid = TARGET_ADDR_BIT <= 32 ? 8 : 16;
+ struct target_section *p;
+ /* FIXME: 16 is not wide enough when gdbarch_addr_bit > 64. */
+ int wid = gdbarch_addr_bit (gdbarch_from_bfd (abfd)) <= 32 ? 8 : 16;
printf_filtered ("\t`%s', ", bfd_get_filename (abfd));
wrap_here (" ");
printf_filtered (_("file type %s.\n"), bfd_get_target (abfd));
if (abfd == exec_bfd)
- {
- printf_filtered (_("\tEntry point: "));
- deprecated_print_address_numeric (bfd_get_start_address (abfd), 1, gdb_stdout);
- printf_filtered ("\n");
- }
+ printf_filtered (_("\tEntry point: %s\n"),
+ paddress (bfd_get_start_address (abfd)));
for (p = t->to_sections; p < t->to_sections_end; p++)
{
printf_filtered ("\t%s", hex_string_custom (p->addr, wid));
}
}
-/* msnyder 5/21/99:
- exec_set_section_offsets sets the offsets of all the sections
- in the exec objfile. */
-
-void
-exec_set_section_offsets (bfd_signed_vma text_off, bfd_signed_vma data_off,
- bfd_signed_vma bss_off)
-{
- struct section_table *sect;
-
- for (sect = exec_ops.to_sections;
- sect < exec_ops.to_sections_end;
- sect++)
- {
- flagword flags;
-
- flags = bfd_get_section_flags (exec_bfd, sect->the_bfd_section);
-
- if (flags & SEC_CODE)
- {
- sect->addr += text_off;
- sect->endaddr += text_off;
- }
- else if (flags & (SEC_DATA | SEC_LOAD))
- {
- sect->addr += data_off;
- sect->endaddr += data_off;
- }
- else if (flags & SEC_ALLOC)
- {
- sect->addr += bss_off;
- sect->endaddr += bss_off;
- }
- }
-}
-
static void
set_section_command (char *args, int from_tty)
{
- struct section_table *p;
+ struct target_section *p;
char *secname;
unsigned seclen;
unsigned long secaddr;
error (_("Section %s not found"), secprint);
}
+/* If we can find a section in FILENAME with BFD index INDEX, adjust
+ it to ADDRESS. */
+
+void
+exec_set_section_address (const char *filename, int index, CORE_ADDR address)
+{
+ struct target_section *p;
+
+ for (p = exec_ops.to_sections; p < exec_ops.to_sections_end; p++)
+ {
+ if (strcmp (filename, p->bfd->filename) == 0
+ && index == p->the_bfd_section->index)
+ {
+ p->endaddr += address - p->addr;
+ p->addr = address;
+ }
+ }
+}
+
/* If mourn is being called in all the right places, this could be say
`gdb internal error' (since generic_mourn calls
breakpoint_init_inferior). */
static int
-ignore (CORE_ADDR addr, char *contents)
+ignore (struct bp_target_info *bp_tgt)
{
return 0;
}
Set writing into executable and core files."), _("\
Show writing into executable and core files."), NULL,
NULL,
- NULL, /* FIXME: i18n: */
+ show_write_files,
&setlist, &showlist);
add_target (&exec_ops);
projects / deliverable / binutils-gdb.git / blobdiff