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authorStan Shebs <shebs@codesourcery.com>1999-04-16 01:35:26 +0000
committerStan Shebs <shebs@codesourcery.com>1999-04-16 01:35:26 +0000
commitc906108c21474dfb4ed285bcc0ac6fe02cd400cc (patch)
treea0015aa5cedc19ccbab307251353a41722a3ae13 /gdb/exec.c
parentcd946cff9ede3f30935803403f06f6ed30cad136 (diff)
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Initial creation of sourceware repositorygdb-4_18-branchpoint
Diffstat (limited to 'gdb/exec.c')
-rw-r--r--gdb/exec.c762
1 files changed, 762 insertions, 0 deletions
diff --git a/gdb/exec.c b/gdb/exec.c
new file mode 100644
index 0000000..87aed01
--- /dev/null
+++ b/gdb/exec.c
@@ -0,0 +1,762 @@
+/* Work with executable files, for GDB.
+ Copyright 1988, 1989, 1991, 1992, 1993, 1994, 1997, 1998
+ 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
+(at your option) any later version.
+
+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, write to the Free Software
+Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
+
+#include "defs.h"
+#include "frame.h"
+#include "inferior.h"
+#include "target.h"
+#include "gdbcmd.h"
+#include "language.h"
+#include "symfile.h"
+#include "objfiles.h"
+
+#ifdef USG
+#include <sys/types.h>
+#endif
+
+#include <fcntl.h>
+#include "gdb_string.h"
+
+#include "gdbcore.h"
+
+#include <ctype.h>
+#include "gdb_stat.h"
+#ifndef O_BINARY
+#define O_BINARY 0
+#endif
+
+#include "xcoffsolib.h"
+
+struct vmap *map_vmap PARAMS ((bfd *, bfd *));
+
+void (*file_changed_hook) PARAMS ((char *));
+
+/* Prototypes for local functions */
+
+static void add_to_section_table PARAMS ((bfd *, sec_ptr, PTR));
+
+static void exec_close PARAMS ((int));
+
+static void file_command PARAMS ((char *, int));
+
+static void set_section_command PARAMS ((char *, int));
+
+static void exec_files_info PARAMS ((struct target_ops *));
+
+static void bfdsec_to_vmap PARAMS ((bfd *, sec_ptr, PTR));
+
+static int ignore PARAMS ((CORE_ADDR, char *));
+
+static void init_exec_ops PARAMS ((void));
+
+void _initialize_exec PARAMS ((void));
+
+extern int info_verbose;
+
+/* The target vector for executable files. */
+
+struct target_ops exec_ops;
+
+/* The Binary File Descriptor handle for the executable file. */
+
+bfd *exec_bfd = NULL;
+
+/* Whether to open exec and core files read-only or read-write. */
+
+int write_files = 0;
+
+/* Text start and end addresses (KLUDGE) if needed */
+
+#ifndef NEED_TEXT_START_END
+#define NEED_TEXT_START_END (0)
+#endif
+CORE_ADDR text_start = 0;
+CORE_ADDR text_end = 0;
+
+struct vmap *vmap;
+
+/* ARGSUSED */
+static void
+exec_close (quitting)
+ int quitting;
+{
+ int need_symtab_cleanup = 0;
+ struct vmap *vp, *nxt;
+
+ for (nxt = vmap; nxt != NULL; )
+ {
+ vp = nxt;
+ nxt = vp->nxt;
+
+ /* if there is an objfile associated with this bfd,
+ free_objfile() will do proper cleanup of objfile *and* bfd. */
+
+ if (vp->objfile)
+ {
+ free_objfile (vp->objfile);
+ need_symtab_cleanup = 1;
+ }
+ else if (vp->bfd != exec_bfd)
+ /* FIXME-leak: We should be freeing vp->name too, I think. */
+ if (!bfd_close (vp->bfd))
+ warning ("cannot close \"%s\": %s",
+ vp->name, bfd_errmsg (bfd_get_error ()));
+
+ /* FIXME: This routine is #if 0'd in symfile.c. What should we
+ be doing here? Should we just free everything in
+ vp->objfile->symtabs? Should free_objfile do that?
+ FIXME-as-well: free_objfile already free'd vp->name, so it isn't
+ valid here. */
+ free_named_symtabs (vp->name);
+ free (vp);
+ }
+
+ vmap = NULL;
+
+ if (exec_bfd)
+ {
+ char *name = bfd_get_filename (exec_bfd);
+
+ if (!bfd_close (exec_bfd))
+ warning ("cannot close \"%s\": %s",
+ name, bfd_errmsg (bfd_get_error ()));
+ 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;
+ }
+}
+
+/* Process the first arg in ARGS 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 (args, from_tty)
+ char *args;
+ int from_tty;
+{
+ char **argv;
+ char *filename;
+
+ /* Remove any previous exec file. */
+ unpush_target (&exec_ops);
+
+ /* Now open and digest the file the user requested, if any. */
+
+ if (args)
+ {
+ char *scratch_pathname;
+ int scratch_chan;
+
+ /* 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 ((make_cleanup_func) freeargv, (char *) argv);
+
+ for (; (*argv != NULL) && (**argv == '-'); argv++) {;}
+ if (*argv == NULL)
+ error ("no exec file name was specified");
+
+ 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 defined(__GO32__) || defined(_WIN32)
+ if (scratch_chan < 0)
+ {
+ char *exename = alloca (strlen (filename) + 5);
+ strcat (strcpy (exename, filename), ".exe");
+ scratch_chan = openp (getenv ("PATH"), 1, exename, write_files ?
+ O_RDWR|O_BINARY : O_RDONLY|O_BINARY, 0, &scratch_pathname);
+ }
+#endif
+ if (scratch_chan < 0)
+ perror_with_name (filename);
+ exec_bfd = bfd_fdopenr (scratch_pathname, gnutarget, scratch_chan);
+
+ if (!exec_bfd)
+ 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 = strdup (scratch_pathname);
+ make_cleanup (free, scratch_pathname);
+
+ if (!bfd_check_format (exec_bfd, bfd_object))
+ {
+ /* 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 ()));
+ }
+
+ /* FIXME - This should only be run for RS6000, but the ifdef is a poor
+ way to accomplish. */
+#ifdef IBM6000_TARGET
+ /* Setup initial vmap. */
+
+ map_vmap (exec_bfd, 0);
+ if (vmap == NULL)
+ {
+ /* Make sure to close exec_bfd, or else "run" might try to use
+ it. */
+ exec_close (0);
+ error ("\"%s\": can't find the file sections: %s",
+ scratch_pathname, bfd_errmsg (bfd_get_error ()));
+ }
+#endif /* IBM6000_TARGET */
+
+ if (build_section_table (exec_bfd, &exec_ops.to_sections,
+ &exec_ops.to_sections_end))
+ {
+ /* Make sure to close exec_bfd, or else "run" might try to use
+ it. */
+ exec_close (0);
+ error ("\"%s\": can't find the file sections: %s",
+ scratch_pathname, bfd_errmsg (bfd_get_error ()));
+ }
+
+ /* text_end is sometimes used for where to put call dummies. A
+ few ports use these for other purposes too. */
+ if (NEED_TEXT_START_END)
+ {
+ struct section_table *p;
+
+ /* 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. */
+ /* FIXME: The comment above does not match the code. The
+ code checks for sections with are either code *or*
+ readonly. */
+ 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;
+ }
+ }
+
+ validate_files ();
+
+ set_gdbarch_from_file (exec_bfd);
+
+ push_target (&exec_ops);
+
+ /* Tell display code (if any) about the changed file name. */
+ if (exec_file_display_hook)
+ (*exec_file_display_hook) (filename);
+ }
+ else if (from_tty)
+ printf_unfiltered ("No executable file now.\n");
+}
+
+/* Process the first arg in ARGS as the new exec file.
+
+ 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. */
+
+void
+exec_file_command (args, from_tty)
+ char *args;
+ int from_tty;
+{
+ char **argv;
+ char *filename;
+
+ target_preopen (from_tty);
+
+ exec_file_attach (args, from_tty);
+}
+
+/* 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;
+{
+ /* 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 (file_changed_hook)
+ file_changed_hook (arg);
+}
+
+
+/* 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;
+{
+ struct section_table **table_pp = (struct section_table **)table_pp_char;
+ flagword aflag;
+
+ 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);
+ (*table_pp)->endaddr = (*table_pp)->addr + bfd_section_size (abfd, asect);
+ (*table_pp)++;
+}
+
+/* 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;
+{
+ unsigned count;
+
+ count = bfd_count_sections (some_bfd);
+ if (*start)
+ free ((PTR)*start);
+ *start = (struct section_table *) xmalloc (count * sizeof (**start));
+ *end = *start;
+ bfd_map_over_sections (some_bfd, add_to_section_table, (char *)end);
+ if (*end > *start + count)
+ abort();
+ /* We could realloc the table, but it probably loses for most files. */
+ return 0;
+}
+
+static void
+bfdsec_to_vmap(abfd, sect, arg3)
+ bfd *abfd;
+ sec_ptr sect;
+ PTR arg3;
+{
+ struct vmap_and_bfd *vmap_bfd = (struct vmap_and_bfd *) arg3;
+ struct vmap *vp;
+
+ vp = vmap_bfd->pvmap;
+
+ if ((bfd_get_section_flags (abfd, sect) & SEC_LOAD) == 0)
+ return;
+
+ if (STREQ (bfd_section_name (abfd, sect), ".text"))
+ {
+ 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 (STREQ (bfd_section_name (abfd, sect), ".data"))
+ {
+ vp->dstart = bfd_section_vma (abfd, sect);
+ vp->dend = vp->dstart + bfd_section_size (abfd, sect);
+ vp->dvma = bfd_section_vma (abfd, sect);
+ }
+ /* Silently ignore other types of sections. (FIXME?) */
+}
+
+/* Make a vmap for ABFD which might be a member of the archive ARCH.
+ Return the new vmap. */
+
+struct vmap *
+map_vmap (abfd, arch)
+ bfd *abfd;
+ bfd *arch;
+{
+ struct vmap_and_bfd vmap_bfd;
+ struct vmap *vp, **vpp;
+
+ vp = (struct vmap *) xmalloc (sizeof (*vp));
+ memset ((char *) vp, '\0', sizeof (*vp));
+ vp->nxt = 0;
+ vp->bfd = abfd;
+ vp->name = bfd_get_filename (arch ? arch : abfd);
+ vp->member = arch ? bfd_get_filename (abfd) : "";
+
+ vmap_bfd.pbfd = arch;
+ vmap_bfd.pvmap = vp;
+ bfd_map_over_sections (abfd, bfdsec_to_vmap, &vmap_bfd);
+
+ /* Find the end of the list and append. */
+ for (vpp = &vmap; *vpp; vpp = &(*vpp)->nxt)
+ ;
+ *vpp = vp;
+
+ return vp;
+}
+
+/* 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 (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));
+ asection *section;
+
+ if (len <= 0)
+ abort();
+
+ if (overlay_debugging)
+ {
+ section = find_pc_overlay (memaddr);
+ if (pc_in_unmapped_range (memaddr, section))
+ memaddr = overlay_mapped_address (memaddr, section);
+ }
+
+ memend = memaddr + len;
+ xfer_fn = write ? bfd_set_section_contents : bfd_get_section_contents;
+ nextsectaddr = memend;
+
+#if 0 /* Stu's implementation */
+/* If a section has been specified, try to use it. Note that we cannot use the
+ specified section directly. This is because it usually comes from the
+ symbol file, which may be different from the exec or core file. Instead, we
+ have to lookup the specified section by name in the bfd associated with
+ to_sections. */
+
+ if (target_memory_bfd_section)
+ {
+ asection *s;
+ bfd *abfd;
+ asection *target_section;
+ bfd *target_bfd;
+
+ s = target_memory_bfd_section;
+ abfd = s->owner;
+
+ target_bfd = target->to_sections->bfd;
+ target_section = bfd_get_section_by_name (target_bfd, bfd_section_name (abfd, s));
+
+ if (target_section)
+ {
+ bfd_vma sec_addr;
+ bfd_size_type sec_size;
+
+ sec_addr = bfd_section_vma (target_bfd, target_section);
+ sec_size = target_section->_raw_size;
+
+ /* Make sure the requested memory starts inside the section. */
+
+ if (memaddr >= sec_addr
+ && memaddr < sec_addr + sec_size)
+ {
+ /* Cut back length in case request overflows the end of the section. */
+ len = min (len, sec_addr + sec_size - memaddr);
+
+ res = xfer_fn (target_bfd, target_section, myaddr, memaddr - sec_addr, len);
+
+ return res ? len : 0;
+ }
+ }
+ }
+#endif /* 0, Stu's implementation */
+ for (p = target->to_sections; p < target->to_sections_end; p++)
+ {
+ if (overlay_debugging && section && p->the_bfd_section &&
+ strcmp (section->name, p->the_bfd_section->name) != 0)
+ continue; /* not the section we need */
+ if (memaddr >= p->addr)
+ if (memend <= p->endaddr)
+ {
+ /* 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 (memaddr >= p->endaddr)
+ {
+ /* 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
+ nextsectaddr = min (nextsectaddr, p->addr);
+ }
+
+ if (nextsectaddr >= memend)
+ return 0; /* We can't help */
+ else
+ return - (nextsectaddr - memaddr); /* Next boundary where we can help */
+}
+
+#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)
+ {
+ i = min (len, reg_stack_end - memaddr);
+ fileptr = memaddr - reg_stack_start + reg_stack_offset;
+ wanna_xfer = coredata;
+ }
+#endif /* REG_STACK_SEGMENT */
+#endif /* FIXME */
+
+void
+print_section_info (t, abfd)
+ struct target_ops *t;
+ bfd *abfd;
+{
+ struct section_table *p;
+
+ 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: ");
+ print_address_numeric (bfd_get_start_address (abfd), 1, gdb_stdout);
+ printf_filtered ("\n");
+ }
+ for (p = t->to_sections; p < t->to_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"));
+ 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));
+ }
+ printf_filtered ("\n");
+ }
+}
+
+static void
+exec_files_info (t)
+ struct target_ops *t;
+{
+ print_section_info (t, exec_bfd);
+
+ if (vmap)
+ {
+ struct vmap *vp;
+
+ printf_unfiltered ("\tMapping info for file `%s'.\n", vmap->name);
+ printf_unfiltered ("\t %8.8s %8.8s %8.8s %8.8s %8.8s %s\n",
+ "tstart", "tend", "dstart", "dend", "section",
+ "file(member)");
+
+ for (vp = vmap; vp; vp = vp->nxt)
+ printf_unfiltered ("\t0x%8.8x 0x%8.8x 0x%8.8x 0x%8.8x %s%s%s%s\n",
+ vp->tstart, vp->tend, vp->dstart, vp->dend, vp->name,
+ *vp->member ? "(" : "", vp->member,
+ *vp->member ? ")" : "");
+ }
+}
+
+static void
+set_section_command (args, from_tty)
+ char *args;
+ int from_tty;
+{
+ struct section_table *p;
+ char *secname;
+ unsigned seclen;
+ unsigned long secaddr;
+ char secprint[100];
+ long offset;
+
+ if (args == 0)
+ error ("Must specify section name and its virtual address");
+
+ /* Parse out section name */
+ for (secname = args; !isspace(*args); args++) ;
+ seclen = args - secname;
+
+ /* 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;
+ }
+ }
+ if (seclen >= sizeof (secprint))
+ seclen = sizeof (secprint) - 1;
+ strncpy (secprint, secname, seclen);
+ secprint[seclen] = '\0';
+ error ("Section %s not found", secprint);
+}
+
+/* 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 (addr, contents)
+ CORE_ADDR addr;
+ char *contents;
+{
+ return 0;
+}
+
+/* Fill in the exec file target vector. Very few entries need to be
+ defined. */
+
+void
+init_exec_ops ()
+{
+ 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_file_command;
+ exec_ops.to_close = exec_close;
+ exec_ops.to_attach = find_default_attach;
+ exec_ops.to_require_attach = find_default_require_attach;
+ exec_ops.to_require_detach = find_default_require_detach;
+ exec_ops.to_xfer_memory = xfer_memory;
+ exec_ops.to_files_info = exec_files_info;
+ exec_ops.to_insert_breakpoint = ignore;
+ exec_ops.to_remove_breakpoint = ignore;
+ exec_ops.to_create_inferior = find_default_create_inferior;
+ exec_ops.to_clone_and_follow_inferior = find_default_clone_and_follow_inferior;
+ exec_ops.to_stratum = file_stratum;
+ exec_ops.to_has_memory = 1;
+ exec_ops.to_magic = OPS_MAGIC;
+}
+
+void
+_initialize_exec ()
+{
+ struct cmd_list_element *c;
+
+ 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;
+ }
+
+ 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;
+
+ 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);
+}