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-rw-r--r--gdb/exec.c775
1 files changed, 0 insertions, 775 deletions
diff --git a/gdb/exec.c b/gdb/exec.c
deleted file mode 100644
index 0228f41..0000000
--- a/gdb/exec.c
+++ /dev/null
@@ -1,775 +0,0 @@
-/* Work with executable files, for GDB.
- Copyright 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997,
- 1998, 1999, 2000, 2001, 2002
- 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"
-#include "completer.h"
-#include "value.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 (bfd *, bfd *);
-
-void (*file_changed_hook) (char *);
-
-/* Prototypes for local functions */
-
-static void add_to_section_table (bfd *, sec_ptr, PTR);
-
-static void exec_close (int);
-
-static void file_command (char *, int);
-
-static void set_section_command (char *, int);
-
-static void exec_files_info (struct target_ops *);
-
-static void bfdsec_to_vmap (bfd *, sec_ptr, PTR);
-
-static int ignore (CORE_ADDR, char *);
-
-static void init_exec_ops (void);
-
-void _initialize_exec (void);
-
-/* 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;
-
-void
-exec_open (char *args, int from_tty)
-{
- target_preopen (from_tty);
- exec_file_attach (args, from_tty);
-}
-
-/* ARGSUSED */
-static void
-exec_close (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);
- xfree (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 ()));
- xfree (name);
- exec_bfd = NULL;
- }
-
- if (exec_ops.to_sections)
- {
- xfree (exec_ops.to_sections);
- exec_ops.to_sections = NULL;
- exec_ops.to_sections_end = NULL;
- }
-}
-
-void
-exec_file_clear (int from_tty)
-{
- /* Remove exec file. */
- unpush_target (&exec_ops);
-
- if (from_tty)
- printf_unfiltered ("No executable file now.\n");
-}
-
-/* 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.)
-
- ARGS is assumed to be the filename. */
-
-void
-exec_file_attach (char *filename, int from_tty)
-{
- /* Remove any previous exec file. */
- unpush_target (&exec_ops);
-
- /* Now open and digest the file the user requested, if any. */
-
- if (!filename)
- {
- if (from_tty)
- printf_unfiltered ("No executable file now.\n");
- }
- else
- {
- char *scratch_pathname;
- int scratch_chan;
-
- 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) || defined(__CYGWIN__)
- 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 = xstrdup (scratch_pathname);
- make_cleanup (xfree, 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);
- }
-}
-
-/* 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.
-
- 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;
-
- target_preopen (from_tty);
-
- if (args)
- {
- /* 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);
-
- 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);
- }
- else
- exec_file_attach (NULL, 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 (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 (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 (bfd *some_bfd, struct section_table **start,
- struct section_table **end)
-{
- unsigned count;
-
- count = bfd_count_sections (some_bfd);
- if (*start)
- xfree (* 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)
- internal_error (__FILE__, __LINE__, "failed internal consistency check");
- /* We could realloc the table, but it probably loses for most files. */
- return 0;
-}
-
-static void
-bfdsec_to_vmap (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 (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 (CORE_ADDR memaddr, char *myaddr, int len, int write,
- struct mem_attrib *attrib,
- struct target_ops *target)
-{
- boolean res;
- struct section_table *p;
- CORE_ADDR nextsectaddr, memend;
- boolean (*xfer_fn) (bfd *, sec_ptr, PTR, file_ptr, bfd_size_type);
- 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;
- xfer_fn = write ? bfd_set_section_contents : bfd_get_section_contents;
- nextsectaddr = memend;
-
- 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 */
-}
-
-
-void
-print_section_info (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 (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 %*s %*s %*s %*s %8.8s %s\n",
- strlen_paddr (), "tstart",
- strlen_paddr (), "tend",
- strlen_paddr (), "dstart",
- strlen_paddr (), "dend",
- "section",
- "file(member)");
-
- for (vp = vmap; vp; vp = vp->nxt)
- printf_unfiltered ("\t0x%s 0x%s 0x%s 0x%s %s%s%s%s\n",
- paddr (vp->tstart),
- paddr (vp->tend),
- paddr (vp->dstart),
- paddr (vp->dend),
- vp->name,
- *vp->member ? "(" : "", vp->member,
- *vp->member ? ")" : "");
- }
-}
-
-/* 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;
- 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 (CORE_ADDR addr, char *contents)
-{
- return 0;
-}
-
-/* Find mapped memory. */
-
-extern void
-exec_set_find_memory_regions (int (*func) (int (*) (CORE_ADDR,
- unsigned long,
- int, int, int,
- void *),
- void *))
-{
- exec_ops.to_find_memory_regions = func;
-}
-
-static char *exec_make_note_section (bfd *, int *);
-
-/* 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;
- 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_make_corefile_notes = exec_make_note_section;
- exec_ops.to_magic = OPS_MAGIC;
-}
-
-void
-_initialize_exec (void)
-{
- 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);
- 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\
-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);
- 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\
-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);
-}
-
-static char *
-exec_make_note_section (bfd *obfd, int *note_size)
-{
- error ("Can't create a corefile");
-}