/* Work with executable files, for GDB.
- Copyright 1988, 1989, 1991, 1992, 1993, 1994 Free Software Foundation, Inc.
-This file is part of GDB.
+ Copyright (C) 1988-2015 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., 675 Mass Ave, Cambridge, MA 02139, 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 "frame.h"
#include "target.h"
#include "gdbcmd.h"
#include "language.h"
+#include "filenames.h"
+#include "symfile.h"
+#include "objfiles.h"
+#include "completer.h"
+#include "value.h"
+#include "exec.h"
+#include "observer.h"
+#include "arch-utils.h"
+#include "gdbthread.h"
+#include "progspace.h"
+#include "gdb_bfd.h"
+#include "gcore.h"
-#ifdef USG
-#include <sys/types.h>
-#endif
-
-#include <sys/param.h>
#include <fcntl.h>
-#include <string.h>
-
+#include "readline/readline.h"
#include "gdbcore.h"
#include <ctype.h>
#include <sys/stat.h>
-#ifndef O_BINARY
-#define O_BINARY 0
-#endif
+#include "solist.h"
-/* Prototypes for local functions */
+void (*deprecated_file_changed_hook) (char *);
-static void
-add_to_section_table PARAMS ((bfd *, sec_ptr, PTR));
+/* Prototypes for local functions */
-static void
-exec_close PARAMS ((int));
+static void file_command (char *, int);
-static void
-file_command PARAMS ((char *, int));
+static void set_section_command (char *, int);
-static void
-set_section_command PARAMS ((char *, int));
+static void exec_files_info (struct target_ops *);
-static void
-exec_files_info PARAMS ((struct target_ops *));
+static void init_exec_ops (void);
-extern int info_verbose;
+void _initialize_exec (void);
-/* The Binary File Descriptor handle for the executable file. */
+/* The target vector for executable files. */
-bfd *exec_bfd = NULL;
+static struct target_ops exec_ops;
/* 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);
+}
-/* Text start and end addresses (KLUDGE) if needed */
-#ifdef NEED_TEXT_START_END
-CORE_ADDR text_start = 0;
-CORE_ADDR text_end = 0;
-#endif
+static void
+exec_open (const char *args, int from_tty)
+{
+ target_preopen (from_tty);
+ exec_file_attach (args, from_tty);
+}
+
+/* Close and clear exec_bfd. If we end up with no target sections to
+ read memory from, this unpushes the exec_ops target. */
+
+void
+exec_close (void)
+{
+ if (exec_bfd)
+ {
+ bfd *abfd = exec_bfd;
+
+ gdb_bfd_unref (abfd);
+
+ /* Removing target sections may close the exec_ops target.
+ Clear exec_bfd before doing so to prevent recursion. */
+ exec_bfd = NULL;
+ exec_bfd_mtime = 0;
-/* Forward decl */
+ remove_target_sections (&exec_bfd);
-extern struct target_ops exec_ops;
+ xfree (exec_filename);
+ exec_filename = NULL;
+ }
+}
+
+/* This is the target_close implementation. Clears all target
+ sections and closes all executable bfds from all program spaces. */
-/* ARGSUSED */
static void
-exec_close (quitting)
- int quitting;
+exec_close_1 (struct target_ops *self)
{
- if (exec_bfd) {
- char *name = bfd_get_filename (exec_bfd);
- bfd_close (exec_bfd);
- free (name);
- exec_bfd = NULL;
- }
- if (exec_ops.to_sections) {
- free ((PTR)exec_ops.to_sections);
- exec_ops.to_sections = NULL;
- exec_ops.to_sections_end = NULL;
+ struct program_space *ss;
+ struct cleanup *old_chain;
+
+ old_chain = save_current_program_space ();
+ ALL_PSPACES (ss)
+ {
+ set_current_program_space (ss);
+ clear_section_table (current_target_sections);
+ exec_close ();
}
+
+ do_cleanups (old_chain);
}
-/* Process the first arg in ARGS as the new exec file.
+void
+exec_file_clear (int from_tty)
+{
+ /* Remove exec file. */
+ exec_close ();
- Note that we have to explicitly ignore additional args, since we can
- be called from file_command(), which also calls symbol_file_command()
- which can take multiple args. */
+ if (from_tty)
+ printf_unfiltered (_("No executable file now.\n"));
+}
+
+/* See gdbcore.h. */
void
-exec_file_command (args, from_tty)
- char *args;
- int from_tty;
+exec_file_locate_attach (int pid, int from_tty)
{
- char **argv;
- char *filename;
+ char *exec_file, *full_exec_path = NULL;
- target_preopen (from_tty);
+ /* Do nothing if we already have an executable filename. */
+ exec_file = (char *) get_exec_file (0);
+ if (exec_file != NULL)
+ return;
+
+ /* Try to determine a filename from the process itself. */
+ exec_file = target_pid_to_exec_file (pid);
+ if (exec_file == NULL)
+ return;
+
+ /* If gdb_sysroot is not empty and the discovered filename
+ is absolute then prefix the filename with gdb_sysroot. */
+ if (*gdb_sysroot != '\0' && IS_ABSOLUTE_PATH (exec_file))
+ full_exec_path = exec_file_find (exec_file, NULL);
+
+ if (full_exec_path == NULL)
+ {
+ /* It's possible we don't have a full path, but rather just a
+ filename. Some targets, such as HP-UX, don't provide the
+ full path, sigh.
+
+ Attempt to qualify the filename against the source path.
+ (If that fails, we'll just fall back on the original
+ filename. Not much more we can do...) */
+ if (!source_full_path_of (exec_file, &full_exec_path))
+ full_exec_path = xstrdup (exec_file);
+ }
+
+ exec_file_attach (full_exec_path, from_tty);
+ symbol_file_add_main (full_exec_path, from_tty);
+}
+
+/* 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
+ a target is being debugged, and will ask the user whether it
+ should be shut down first. (If the answer is "no", then the
+ new file is ignored.)
+
+ This file is used by exec_file_command, to do the work of opening
+ and processing the exec file after any prompting has happened.
+
+ And, it is used by child_attach, when the attach command was
+ 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.) */
+
+void
+exec_file_attach (const char *filename, int from_tty)
+{
+ struct cleanup *cleanups;
+
+ /* First, acquire a reference to the current exec_bfd. We release
+ this at the end of the function; but acquiring it now lets the
+ BFD cache return it if this call refers to the same file. */
+ gdb_bfd_ref (exec_bfd);
+ cleanups = make_cleanup_bfd_unref (exec_bfd);
/* Remove any previous exec file. */
- unpush_target (&exec_ops);
+ exec_close ();
/* Now open and digest the file the user requested, if any. */
- if (args)
+ if (!filename)
+ {
+ if (from_tty)
+ printf_unfiltered (_("No executable file now.\n"));
+
+ set_gdbarch_from_file (NULL);
+ }
+ else
{
- char *scratch_pathname;
+ int load_via_target = 0;
+ char *scratch_pathname, *canonical_pathname;
int scratch_chan;
-
- /* Scan through the args and pick up the first non option arg
- as the filename. */
+ struct target_section *sections = NULL, *sections_end = NULL;
+ char **matching;
- if ((argv = buildargv (args)) == NULL)
+ if (is_target_filename (filename))
{
- nomem (0);
+ if (target_filesystem_is_local ())
+ filename += strlen (TARGET_SYSROOT_PREFIX);
+ else
+ load_via_target = 1;
}
- make_cleanup (freeargv, (char *) argv);
- for (; (*argv != NULL) && (**argv == '-'); argv++) {;}
- if (*argv == NULL)
+ if (load_via_target)
+ {
+ /* gdb_bfd_fopen does not support "target:" filenames. */
+ if (write_files)
+ warning (_("writing into executable files is "
+ "not supported for %s sysroots"),
+ TARGET_SYSROOT_PREFIX);
+
+ scratch_pathname = xstrdup (filename);
+ make_cleanup (xfree, scratch_pathname);
+
+ scratch_chan = -1;
+
+ canonical_pathname = scratch_pathname;
+ }
+ else
{
- error ("no exec file name was specified");
+ scratch_chan = openp (getenv ("PATH"), OPF_TRY_CWD_FIRST,
+ filename, 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,
+ &scratch_pathname);
+ }
+#endif
+ if (scratch_chan < 0)
+ perror_with_name (filename);
+
+ make_cleanup (xfree, scratch_pathname);
+
+ /* gdb_bfd_open (and its variants) prefers canonicalized
+ pathname for better BFD caching. */
+ canonical_pathname = gdb_realpath (scratch_pathname);
+ make_cleanup (xfree, canonical_pathname);
}
- filename = tilde_expand (*argv);
- make_cleanup (free, filename);
-
- scratch_chan = openp (getenv ("PATH"), 1, filename,
- write_files? O_RDWR|O_BINARY: O_RDONLY|O_BINARY, 0,
- &scratch_pathname);
- if (scratch_chan < 0)
- perror_with_name (filename);
-
- exec_bfd = bfd_fdopenr (scratch_pathname, gnutarget, scratch_chan);
+ if (write_files && !load_via_target)
+ exec_bfd = gdb_bfd_fopen (canonical_pathname, gnutarget,
+ FOPEN_RUB, scratch_chan);
+ else
+ exec_bfd = gdb_bfd_open (canonical_pathname, gnutarget, scratch_chan);
+
if (!exec_bfd)
- error ("Could not open `%s' as an executable file: %s",
- scratch_pathname, bfd_errmsg (bfd_get_error ()));
- if (!bfd_check_format (exec_bfd, bfd_object))
+ {
+ error (_("\"%s\": could not open as an executable file: %s."),
+ scratch_pathname, bfd_errmsg (bfd_get_error ()));
+ }
+
+ /* gdb_realpath_keepfile resolves symlinks on the local
+ filesystem and so cannot be used for "target:" files. */
+ gdb_assert (exec_filename == NULL);
+ if (load_via_target)
+ exec_filename = xstrdup (bfd_get_filename (exec_bfd));
+ else
+ exec_filename = gdb_realpath_keepfile (scratch_pathname);
+
+ if (!bfd_check_format_matches (exec_bfd, bfd_object, &matching))
{
/* Make sure to close exec_bfd, or else "run" might try to use
it. */
- exec_close (0);
- error ("\"%s\": not in executable format: %s.",
- scratch_pathname, bfd_errmsg (bfd_get_error ()));
+ exec_close ();
+ error (_("\"%s\": not in executable format: %s"),
+ scratch_pathname,
+ gdb_bfd_errmsg (bfd_get_error (), matching));
}
- if (build_section_table (exec_bfd, &exec_ops.to_sections,
- &exec_ops.to_sections_end))
+ if (build_section_table (exec_bfd, §ions, §ions_end))
{
/* Make sure to close exec_bfd, or else "run" might try to use
it. */
- exec_close (0);
- error ("Can't find the file sections in `%s': %s",
- exec_bfd->filename, bfd_errmsg (bfd_get_error ()));
+ exec_close ();
+ error (_("\"%s\": can't find the file sections: %s"),
+ scratch_pathname, bfd_errmsg (bfd_get_error ()));
}
-#ifdef NEED_TEXT_START_END
+ exec_bfd_mtime = bfd_get_mtime (exec_bfd);
- /* text_end is sometimes used for where to put call dummies. A
- few ports use these for other purposes too. */
+ validate_files ();
- {
- struct section_table *p;
+ set_gdbarch_from_file (exec_bfd);
- /* Set text_start to the lowest address of the start of any
- readonly code section and set text_end to the highest
- address of the end of any readonly code section. */
+ /* Add the executable's sections to the current address spaces'
+ list of sections. This possibly pushes the exec_ops
+ target. */
+ add_target_sections (&exec_bfd, sections, sections_end);
+ xfree (sections);
- text_start = ~(CORE_ADDR)0;
- text_end = (CORE_ADDR)0;
- for (p = exec_ops.to_sections; p < exec_ops.to_sections_end; p++)
- if (bfd_get_section_flags (p->bfd, p->the_bfd_section)
- & (SEC_CODE | SEC_READONLY))
- {
- if (text_start > p->addr)
- text_start = p->addr;
- if (text_end < p->endaddr)
- text_end = p->endaddr;
- }
- }
-#endif
+ /* Tell display code (if any) about the changed file name. */
+ if (deprecated_exec_file_display_hook)
+ (*deprecated_exec_file_display_hook) (filename);
+ }
- validate_files ();
+ do_cleanups (cleanups);
- set_endian_from_file (exec_bfd);
+ bfd_cache_close_all ();
+ observer_notify_executable_changed ();
+}
- push_target (&exec_ops);
+/* Process the first arg in ARGS as the new exec file.
- /* Tell display code (if any) about the changed file name. */
- if (exec_file_display_hook)
- (*exec_file_display_hook) (filename);
+ Note that we have to explicitly ignore additional args, since we can
+ be called from file_command(), which also calls symbol_file_command()
+ which can take multiple args.
+
+ If ARGS is NULL, we just want to close the exec file. */
+
+static void
+exec_file_command (char *args, int from_tty)
+{
+ char **argv;
+ char *filename;
+
+ 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 = gdb_buildargv (args);
+ cleanups = make_cleanup_freeargv (argv);
+
+ for (; (*argv != NULL) && (**argv == '-'); argv++)
+ {;
+ }
+ if (*argv == NULL)
+ error (_("No executable file name was specified"));
+
+ filename = tilde_expand (*argv);
+ make_cleanup (xfree, filename);
+ exec_file_attach (filename, from_tty);
+
+ do_cleanups (cleanups);
}
- else if (from_tty)
- printf_unfiltered ("No exec file now.\n");
+ else
+ exec_file_attach (NULL, from_tty);
}
-/* Set both the exec file and the symbol file, in one command.
+/* Set both the exec file and the symbol file, in one command.
What a novelty. Why did GDB go through four major releases before this
command was added? */
static void
-file_command (arg, from_tty)
- char *arg;
- int from_tty;
+file_command (char *arg, int from_tty)
{
/* FIXME, if we lose on reading the symbol file, we should revert
the exec file, but that's rough. */
exec_file_command (arg, from_tty);
symbol_file_command (arg, from_tty);
+ if (deprecated_file_changed_hook)
+ deprecated_file_changed_hook (arg);
}
-
\f
-/* Locate all mappable sections of a BFD file.
+
+/* Locate all mappable sections of a BFD file.
table_pp_char is a char * to get it through bfd_map_over_sections;
we cast it back to its proper type. */
static void
-add_to_section_table (abfd, asect, table_pp_char)
- bfd *abfd;
- sec_ptr asect;
- PTR table_pp_char;
+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;
+ gdb_assert (abfd == asect->owner);
+
+ /* 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)->owner = NULL;
(*table_pp)->the_bfd_section = asect;
(*table_pp)->addr = bfd_section_vma (abfd, asect);
(*table_pp)->endaddr = (*table_pp)->addr + bfd_section_size (abfd, asect);
(*table_pp)++;
}
+/* See exec.h. */
+
+void
+clear_section_table (struct target_section_table *table)
+{
+ xfree (table->sections);
+ table->sections = table->sections_end = NULL;
+}
+
+/* Resize section table TABLE by ADJUSTMENT.
+ ADJUSTMENT may be negative, in which case the caller must have already
+ removed the sections being deleted.
+ Returns the old size. */
+
+static int
+resize_section_table (struct target_section_table *table, int adjustment)
+{
+ int old_count;
+ int new_count;
+
+ old_count = table->sections_end - table->sections;
+
+ new_count = adjustment + old_count;
+
+ if (new_count)
+ {
+ table->sections = xrealloc (table->sections,
+ sizeof (struct target_section) * new_count);
+ table->sections_end = table->sections + new_count;
+ }
+ else
+ clear_section_table (table);
+
+ return old_count;
+}
+
/* Builds a section table, given args BFD, SECTABLE_PTR, SECEND_PTR.
Returns 0 if OK, 1 on error. */
int
-build_section_table (some_bfd, start, end)
- bfd *some_bfd;
- struct section_table **start, **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)
- free ((PTR)*start);
- *start = (struct section_table *) xmalloc (count * sizeof (**start));
+ xfree (* start);
+ *start = XNEWVEC (struct target_section, count);
*end = *start;
- bfd_map_over_sections (some_bfd, add_to_section_table, (char *)end);
+ bfd_map_over_sections (some_bfd, add_to_section_table, (char *) end);
if (*end > *start + count)
- abort();
+ internal_error (__FILE__, __LINE__,
+ _("failed internal consistency check"));
/* We could realloc the table, but it probably loses for most files. */
return 0;
}
-\f
-/* 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.
+/* Add the sections array defined by [SECTIONS..SECTIONS_END[ to the
+ current set of target sections. */
- Result is a length:
+void
+add_target_sections (void *owner,
+ struct target_section *sections,
+ struct target_section *sections_end)
+{
+ int count;
+ struct target_section_table *table = current_target_sections;
- 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.
+ count = sections_end - sections;
- The same routine is used to handle both core and exec files;
- we just tail-call it with more arguments to select between them. */
+ if (count > 0)
+ {
+ int space = resize_section_table (table, count);
+ int i;
-int
-xfer_memory (memaddr, myaddr, len, write, target)
- CORE_ADDR memaddr;
- char *myaddr;
- int len;
- int write;
- struct target_ops *target;
-{
- boolean res;
- struct section_table *p;
- CORE_ADDR nextsectaddr, memend;
- boolean (*xfer_fn) PARAMS ((bfd *, sec_ptr, PTR, file_ptr, bfd_size_type));
+ for (i = 0; i < count; ++i)
+ {
+ table->sections[space + i] = sections[i];
+ table->sections[space + i].owner = owner;
+ }
+
+ /* If these are the first file sections we can provide memory
+ from, push the file_stratum target. */
+ if (!target_is_pushed (&exec_ops))
+ push_target (&exec_ops);
+ }
+}
- if (len <= 0)
- abort();
+/* Add the sections of OBJFILE to the current set of target sections. */
- memend = memaddr + len;
- xfer_fn = write? bfd_set_section_contents: bfd_get_section_contents;
- nextsectaddr = memend;
+void
+add_target_sections_of_objfile (struct objfile *objfile)
+{
+ struct target_section_table *table = current_target_sections;
+ struct obj_section *osect;
+ int space;
+ unsigned count = 0;
+ struct target_section *ts;
+
+ if (objfile == NULL)
+ return;
- for (p = target->to_sections; p < target->to_sections_end; p++)
+ /* Compute the number of sections to add. */
+ ALL_OBJFILE_OSECTIONS (objfile, osect)
{
- if (p->addr <= memaddr)
- if (p->endaddr >= memend)
- {
- /* Entire transfer is within this section. */
- res = xfer_fn (p->bfd, p->the_bfd_section, myaddr, memaddr - p->addr, len);
- return (res != 0) ? len : 0;
- }
- else if (p->endaddr <= memaddr)
- {
- /* This section ends before the transfer starts. */
- continue;
- }
- else
- {
- /* This section overlaps the transfer. Just do half. */
- len = p->endaddr - memaddr;
- res = xfer_fn (p->bfd, p->the_bfd_section, myaddr, memaddr - p->addr, len);
- return (res != 0) ? len : 0;
- }
- else if (p->addr < nextsectaddr)
- nextsectaddr = p->addr;
+ if (bfd_get_section_size (osect->the_bfd_section) == 0)
+ continue;
+ count++;
}
- if (nextsectaddr >= memend)
- return 0; /* We can't help */
- else
- return - (nextsectaddr - memaddr); /* Next boundary where we can help */
+ if (count == 0)
+ return;
+
+ space = resize_section_table (table, count);
+
+ ts = table->sections + space;
+
+ ALL_OBJFILE_OSECTIONS (objfile, osect)
+ {
+ if (bfd_get_section_size (osect->the_bfd_section) == 0)
+ continue;
+
+ gdb_assert (ts < table->sections + space + count);
+
+ ts->addr = obj_section_addr (osect);
+ ts->endaddr = obj_section_endaddr (osect);
+ ts->the_bfd_section = osect->the_bfd_section;
+ ts->owner = (void *) objfile;
+
+ ts++;
+ }
}
-#ifdef FIXME
-#ifdef REG_STACK_SEGMENT
-/* MOVE TO BFD... */
- /* Pyramids and AM29000s have an extra segment in the virtual address space
- for the (control) stack of register-window frames. The AM29000 folk
- call it the "register stack" rather than the "memory stack". */
- else if (memaddr >= reg_stack_start && memaddr < reg_stack_end)
+/* Remove all target sections owned by OWNER.
+ OWNER must be the same value passed to add_target_sections. */
+
+void
+remove_target_sections (void *owner)
+{
+ struct target_section *src, *dest;
+ struct target_section_table *table = current_target_sections;
+
+ gdb_assert (owner != NULL);
+
+ dest = table->sections;
+ for (src = table->sections; src < table->sections_end; src++)
+ if (src->owner != owner)
{
- i = min (len, reg_stack_end - memaddr);
- fileptr = memaddr - reg_stack_start + reg_stack_offset;
- wanna_xfer = coredata;
+ /* Keep this section. */
+ if (dest < src)
+ *dest = *src;
+ dest++;
}
-#endif /* REG_STACK_SEGMENT */
-#endif /* FIXME */
+
+ /* If we've dropped any sections, resize the section table. */
+ if (dest < src)
+ {
+ int old_count;
+
+ old_count = resize_section_table (table, dest - src);
+
+ /* If we don't have any more sections to read memory from,
+ remove the file_stratum target from the stack. */
+ if (old_count + (dest - src) == 0)
+ {
+ struct program_space *pspace;
+
+ ALL_PSPACES (pspace)
+ if (pspace->target_sections.sections
+ != pspace->target_sections.sections_end)
+ return;
+
+ unpush_target (&exec_ops);
+ }
+ }
+}
+
+\f
+
+enum target_xfer_status
+exec_read_partial_read_only (gdb_byte *readbuf, ULONGEST offset,
+ ULONGEST len, ULONGEST *xfered_len)
+{
+ /* It's unduly pedantic to refuse to look at the executable for
+ read-only pieces; so do the equivalent of readonly regions aka
+ QTro packet. */
+ if (exec_bfd != NULL)
+ {
+ asection *s;
+ bfd_size_type size;
+ bfd_vma vma;
+
+ for (s = exec_bfd->sections; s; s = s->next)
+ {
+ if ((s->flags & SEC_LOAD) == 0
+ || (s->flags & SEC_READONLY) == 0)
+ continue;
+
+ vma = s->vma;
+ size = bfd_get_section_size (s);
+ if (vma <= offset && offset < (vma + size))
+ {
+ ULONGEST amt;
+
+ amt = (vma + size) - offset;
+ if (amt > len)
+ amt = len;
+
+ amt = bfd_get_section_contents (exec_bfd, s,
+ readbuf, offset - vma, amt);
+
+ if (amt == 0)
+ return TARGET_XFER_EOF;
+ else
+ {
+ *xfered_len = amt;
+ return TARGET_XFER_OK;
+ }
+ }
+ }
+ }
+
+ /* Indicate failure to find the requested memory block. */
+ return TARGET_XFER_E_IO;
+}
+
+/* Appends all read-only memory ranges found in the target section
+ table defined by SECTIONS and SECTIONS_END, starting at (and
+ intersected with) MEMADDR for LEN bytes. Returns the augmented
+ VEC. */
+
+static VEC(mem_range_s) *
+section_table_available_memory (VEC(mem_range_s) *memory,
+ CORE_ADDR memaddr, ULONGEST len,
+ struct target_section *sections,
+ struct target_section *sections_end)
+{
+ struct target_section *p;
+
+ for (p = sections; p < sections_end; p++)
+ {
+ if ((bfd_get_section_flags (p->the_bfd_section->owner,
+ p->the_bfd_section)
+ & SEC_READONLY) == 0)
+ continue;
+
+ /* Copy the meta-data, adjusted. */
+ if (mem_ranges_overlap (p->addr, p->endaddr - p->addr, memaddr, len))
+ {
+ ULONGEST lo1, hi1, lo2, hi2;
+ struct mem_range *r;
+
+ lo1 = memaddr;
+ hi1 = memaddr + len;
+
+ lo2 = p->addr;
+ hi2 = p->endaddr;
+
+ r = VEC_safe_push (mem_range_s, memory, NULL);
+
+ r->start = max (lo1, lo2);
+ r->length = min (hi1, hi2) - r->start;
+ }
+ }
+
+ return memory;
+}
+
+enum target_xfer_status
+section_table_read_available_memory (gdb_byte *readbuf, ULONGEST offset,
+ ULONGEST len, ULONGEST *xfered_len)
+{
+ VEC(mem_range_s) *available_memory = NULL;
+ struct target_section_table *table;
+ struct cleanup *old_chain;
+ mem_range_s *r;
+ int i;
+
+ table = target_get_section_table (&exec_ops);
+ available_memory = section_table_available_memory (available_memory,
+ offset, len,
+ table->sections,
+ table->sections_end);
+
+ old_chain = make_cleanup (VEC_cleanup(mem_range_s),
+ &available_memory);
+
+ normalize_mem_ranges (available_memory);
+
+ for (i = 0;
+ VEC_iterate (mem_range_s, available_memory, i, r);
+ i++)
+ {
+ if (mem_ranges_overlap (r->start, r->length, offset, len))
+ {
+ CORE_ADDR end;
+ enum target_xfer_status status;
+
+ /* Get the intersection window. */
+ end = min (offset + len, r->start + r->length);
+
+ gdb_assert (end - offset <= len);
+
+ if (offset >= r->start)
+ status = exec_read_partial_read_only (readbuf, offset,
+ end - offset,
+ xfered_len);
+ else
+ {
+ *xfered_len = r->start - offset;
+ status = TARGET_XFER_UNAVAILABLE;
+ }
+ do_cleanups (old_chain);
+ return status;
+ }
+ }
+ do_cleanups (old_chain);
+
+ *xfered_len = len;
+ return TARGET_XFER_UNAVAILABLE;
+}
+
+enum target_xfer_status
+section_table_xfer_memory_partial (gdb_byte *readbuf, const gdb_byte *writebuf,
+ ULONGEST offset, ULONGEST len,
+ ULONGEST *xfered_len,
+ struct target_section *sections,
+ struct target_section *sections_end,
+ const char *section_name)
+{
+ int res;
+ struct target_section *p;
+ ULONGEST memaddr = offset;
+ ULONGEST memend = memaddr + len;
+
+ if (len == 0)
+ internal_error (__FILE__, __LINE__,
+ _("failed internal consistency check"));
+
+ for (p = sections; p < sections_end; p++)
+ {
+ struct bfd_section *asect = p->the_bfd_section;
+ bfd *abfd = asect->owner;
+
+ if (section_name && strcmp (section_name, asect->name) != 0)
+ continue; /* not the section we need. */
+ if (memaddr >= p->addr)
+ {
+ if (memend <= p->endaddr)
+ {
+ /* Entire transfer is within this section. */
+ if (writebuf)
+ res = bfd_set_section_contents (abfd, asect,
+ writebuf, memaddr - p->addr,
+ len);
+ else
+ res = bfd_get_section_contents (abfd, asect,
+ readbuf, memaddr - p->addr,
+ len);
+
+ if (res != 0)
+ {
+ *xfered_len = len;
+ return TARGET_XFER_OK;
+ }
+ else
+ return TARGET_XFER_EOF;
+ }
+ else if (memaddr >= p->endaddr)
+ {
+ /* This section ends before the transfer starts. */
+ continue;
+ }
+ else
+ {
+ /* This section overlaps the transfer. Just do half. */
+ len = p->endaddr - memaddr;
+ if (writebuf)
+ res = bfd_set_section_contents (abfd, asect,
+ writebuf, memaddr - p->addr,
+ len);
+ else
+ res = bfd_get_section_contents (abfd, asect,
+ readbuf, memaddr - p->addr,
+ len);
+ if (res != 0)
+ {
+ *xfered_len = len;
+ return TARGET_XFER_OK;
+ }
+ else
+ return TARGET_XFER_EOF;
+ }
+ }
+ }
+
+ return TARGET_XFER_EOF; /* We can't help. */
+}
+
+static struct target_section_table *
+exec_get_section_table (struct target_ops *ops)
+{
+ return current_target_sections;
+}
+
+static enum target_xfer_status
+exec_xfer_partial (struct target_ops *ops, enum target_object object,
+ const char *annex, gdb_byte *readbuf,
+ const gdb_byte *writebuf,
+ ULONGEST offset, ULONGEST len, ULONGEST *xfered_len)
+{
+ struct target_section_table *table = target_get_section_table (ops);
+
+ if (object == TARGET_OBJECT_MEMORY)
+ return section_table_xfer_memory_partial (readbuf, writebuf,
+ offset, len, xfered_len,
+ table->sections,
+ table->sections_end,
+ NULL);
+ else
+ return TARGET_XFER_E_IO;
+}
\f
+
void
-print_section_info (t, abfd)
- struct target_ops *t;
- bfd *abfd;
+print_section_info (struct target_section_table *t, bfd *abfd)
{
- struct section_table *p;
+ struct gdbarch *gdbarch = gdbarch_from_bfd (abfd);
+ struct target_section *p;
+ /* FIXME: 16 is not wide enough when gdbarch_addr_bit > 64. */
+ int wid = gdbarch_addr_bit (gdbarch) <= 32 ? 8 : 16;
- printf_filtered ("\t`%s', ", bfd_get_filename(abfd));
+ printf_filtered ("\t`%s', ", bfd_get_filename (abfd));
wrap_here (" ");
- printf_filtered ("file type %s.\n", bfd_get_target(abfd));
+ printf_filtered (_("file type %s.\n"), bfd_get_target (abfd));
if (abfd == exec_bfd)
{
- printf_filtered ("\tEntry point: ");
- print_address_numeric (bfd_get_start_address (abfd), 1, gdb_stdout);
- printf_filtered ("\n");
+ /* gcc-3.4 does not like the initialization in
+ <p == t->sections_end>. */
+ bfd_vma displacement = 0;
+ bfd_vma entry_point;
+
+ for (p = t->sections; p < t->sections_end; p++)
+ {
+ struct bfd_section *psect = p->the_bfd_section;
+ bfd *pbfd = psect->owner;
+
+ if ((bfd_get_section_flags (pbfd, psect) & (SEC_ALLOC | SEC_LOAD))
+ != (SEC_ALLOC | SEC_LOAD))
+ continue;
+
+ if (bfd_get_section_vma (pbfd, psect) <= abfd->start_address
+ && abfd->start_address < (bfd_get_section_vma (pbfd, psect)
+ + bfd_get_section_size (psect)))
+ {
+ displacement = p->addr - bfd_get_section_vma (pbfd, psect);
+ break;
+ }
+ }
+ if (p == t->sections_end)
+ warning (_("Cannot find section for the entry point of %s."),
+ bfd_get_filename (abfd));
+
+ entry_point = gdbarch_addr_bits_remove (gdbarch,
+ bfd_get_start_address (abfd)
+ + displacement);
+ printf_filtered (_("\tEntry point: %s\n"),
+ paddress (gdbarch, entry_point));
}
- for (p = t->to_sections; p < t->to_sections_end; p++)
+ for (p = t->sections; p < t->sections_end; p++)
{
- /* FIXME-32x64 need a print_address_numeric with field width */
- printf_filtered ("\t%s", local_hex_string_custom ((unsigned long) p->addr, "08l"));
- printf_filtered (" - %s", local_hex_string_custom ((unsigned long) p->endaddr, "08l"));
+ struct bfd_section *psect = p->the_bfd_section;
+ bfd *pbfd = psect->owner;
+
+ printf_filtered ("\t%s", hex_string_custom (p->addr, wid));
+ printf_filtered (" - %s", hex_string_custom (p->endaddr, wid));
+
+ /* FIXME: A format of "08l" is not wide enough for file offsets
+ larger than 4GB. OTOH, making it "016l" isn't desirable either
+ since most output will then be much wider than necessary. It
+ may make sense to test the size of the file and choose the
+ format string accordingly. */
+ /* FIXME: i18n: Need to rewrite this sentence. */
if (info_verbose)
printf_filtered (" @ %s",
- local_hex_string_custom ((unsigned long) p->the_bfd_section->filepos, "08l"));
- printf_filtered (" is %s", bfd_section_name (p->bfd, p->the_bfd_section));
- if (p->bfd != abfd)
- {
- printf_filtered (" in %s", bfd_get_filename (p->bfd));
- }
+ hex_string_custom (psect->filepos, 8));
+ printf_filtered (" is %s", bfd_section_name (pbfd, psect));
+ if (pbfd != abfd)
+ printf_filtered (" in %s", bfd_get_filename (pbfd));
printf_filtered ("\n");
}
}
static void
-exec_files_info (t)
- struct target_ops *t;
+exec_files_info (struct target_ops *t)
{
- print_section_info (t, exec_bfd);
+ if (exec_bfd)
+ print_section_info (current_target_sections, exec_bfd);
+ else
+ puts_filtered (_("\t<no file loaded>\n"));
}
static void
-set_section_command (args, from_tty)
- char *args;
- int from_tty;
+set_section_command (char *args, int from_tty)
{
- struct section_table *p;
+ struct target_section *p;
char *secname;
unsigned seclen;
unsigned long secaddr;
char secprint[100];
long offset;
+ struct target_section_table *table;
if (args == 0)
- error ("Must specify section name and its virtual address");
+ error (_("Must specify section name and its virtual address"));
- /* Parse out section name */
- for (secname = args; !isspace(*args); args++) ;
+ /* Parse out section name. */
+ for (secname = args; !isspace (*args); args++);
seclen = args - secname;
- /* Parse out new virtual address */
+ /* Parse out new virtual address. */
secaddr = parse_and_eval_address (args);
- for (p = exec_ops.to_sections; p < exec_ops.to_sections_end; p++) {
- if (!strncmp (secname, bfd_section_name (exec_bfd, p->the_bfd_section), seclen)
- && bfd_section_name (exec_bfd, p->the_bfd_section)[seclen] == '\0') {
- offset = secaddr - p->addr;
- p->addr += offset;
- p->endaddr += offset;
- if (from_tty)
- exec_files_info(&exec_ops);
- return;
+ table = current_target_sections;
+ for (p = table->sections; p < table->sections_end; p++)
+ {
+ if (!strncmp (secname, bfd_section_name (p->bfd,
+ p->the_bfd_section), seclen)
+ && bfd_section_name (p->bfd, p->the_bfd_section)[seclen] == '\0')
+ {
+ offset = secaddr - p->addr;
+ p->addr += offset;
+ p->endaddr += offset;
+ if (from_tty)
+ exec_files_info (&exec_ops);
+ return;
+ }
}
- }
if (seclen >= sizeof (secprint))
seclen = sizeof (secprint) - 1;
strncpy (secprint, secname, seclen);
secprint[seclen] = '\0';
- error ("Section %s not found", secprint);
+ 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;
+ struct target_section_table *table;
+
+ table = current_target_sections;
+ for (p = table->sections; p < table->sections_end; p++)
+ {
+ if (filename_cmp (filename, p->the_bfd_section->owner->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). */
+ `gdb internal error' (since generic_mourn calls
+ breakpoint_init_inferior). */
static int
-ignore (addr, contents)
- CORE_ADDR addr;
- char *contents;
+ignore (struct target_ops *ops, struct gdbarch *gdbarch,
+ struct bp_target_info *bp_tgt)
{
return 0;
}
-struct target_ops exec_ops = {
- "exec", "Local exec file",
- "Use an executable file as a target.\n\
-Specify the filename of the executable file.",
- exec_file_command, exec_close, /* open, close */
- find_default_attach, 0, 0, 0, /* attach, detach, resume, wait, */
- 0, 0, /* fetch_registers, store_registers, */
- 0, /* prepare_to_store, */
- xfer_memory, exec_files_info,
- ignore, ignore, /* insert_breakpoint, remove_breakpoint, */
- 0, 0, 0, 0, 0, /* terminal stuff */
- 0, 0, /* kill, load */
- 0, /* lookup sym */
- find_default_create_inferior,
- 0, /* mourn_inferior */
- 0, /* can_run */
- 0, /* notice_signals */
- file_stratum, 0, /* next */
- 0, 1, 0, 0, 0, /* all mem, mem, stack, regs, exec */
- 0, 0, /* section pointers */
- OPS_MAGIC, /* Always the last thing */
-};
+static int
+exec_has_memory (struct target_ops *ops)
+{
+ /* We can provide memory if we have any file/target sections to read
+ from. */
+ return (current_target_sections->sections
+ != current_target_sections->sections_end);
+}
+
+static char *
+exec_make_note_section (struct target_ops *self, bfd *obfd, int *note_size)
+{
+ error (_("Can't create a corefile"));
+}
+
+/* Fill in the exec file target vector. Very few entries need to be
+ defined. */
+
+static void
+init_exec_ops (void)
+{
+ exec_ops.to_shortname = "exec";
+ exec_ops.to_longname = "Local exec file";
+ exec_ops.to_doc = "Use an executable file as a target.\n\
+Specify the filename of the executable file.";
+ exec_ops.to_open = exec_open;
+ exec_ops.to_close = exec_close_1;
+ exec_ops.to_xfer_partial = exec_xfer_partial;
+ exec_ops.to_get_section_table = exec_get_section_table;
+ exec_ops.to_files_info = exec_files_info;
+ exec_ops.to_insert_breakpoint = ignore;
+ exec_ops.to_remove_breakpoint = ignore;
+ exec_ops.to_stratum = file_stratum;
+ exec_ops.to_has_memory = exec_has_memory;
+ exec_ops.to_make_corefile_notes = exec_make_note_section;
+ exec_ops.to_find_memory_regions = objfile_find_memory_regions;
+ exec_ops.to_magic = OPS_MAGIC;
+}
void
-_initialize_exec()
+_initialize_exec (void)
{
struct cmd_list_element *c;
- c = add_cmd ("file", class_files, file_command,
- "Use FILE as program to be debugged.\n\
+ init_exec_ops ();
+
+ if (!dbx_commands)
+ {
+ c = add_cmd ("file", class_files, file_command, _("\
+Use FILE as program to be debugged.\n\
It is read for its symbols, for getting the contents of pure memory,\n\
and it is the program executed when you use the `run' command.\n\
If FILE cannot be found as specified, your execution directory path\n\
($PATH) is searched for a command of that name.\n\
-No arg means to have no executable file and no symbols.", &cmdlist);
- c->completer = filename_completer;
+No arg means to have no executable file and no symbols."), &cmdlist);
+ set_cmd_completer (c, filename_completer);
+ }
- c = add_cmd ("exec-file", class_files, exec_file_command,
- "Use FILE as program for getting contents of pure memory.\n\
+ c = add_cmd ("exec-file", class_files, exec_file_command, _("\
+Use FILE as program for getting contents of pure memory.\n\
If FILE cannot be found as specified, your execution directory path\n\
is searched for a command of that name.\n\
-No arg means have no executable file.", &cmdlist);
- c->completer = filename_completer;
+No arg means have no executable file."), &cmdlist);
+ set_cmd_completer (c, filename_completer);
- add_com ("section", class_files, set_section_command,
- "Change the base address of section SECTION of the exec file to ADDR.\n\
+ add_com ("section", class_files, set_section_command, _("\
+Change the base address of section SECTION of the exec file to ADDR.\n\
This can be used if the exec file does not contain section addresses,\n\
(such as in the a.out format), or when the addresses specified in the\n\
file itself are wrong. Each section must be changed separately. The\n\
-``info files'' command lists all the sections and their addresses.");
-
- add_show_from_set
- (add_set_cmd ("write", class_support, var_boolean, (char *)&write_files,
- "Set writing into executable and core files.",
- &setlist),
- &showlist);
-
- add_target (&exec_ops);
+``info files'' command lists all the sections and their addresses."));
+
+ add_setshow_boolean_cmd ("write", class_support, &write_files, _("\
+Set writing into executable and core files."), _("\
+Show writing into executable and core files."), NULL,
+ NULL,
+ show_write_files,
+ &setlist, &showlist);
+
+ add_target_with_completer (&exec_ops, filename_completer);
}
projects / deliverable / binutils-gdb.git / blobdiff