/* Work with executable files, for GDB.
- Copyright (C) 1988, 1989 Free Software Foundation, Inc.
+ Copyright 1988, 1989, 1991, 1992 Free Software Foundation, Inc.
This file is part of GDB.
-GDB is free software; you can redistribute it and/or modify
+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 1, or (at your option)
-any later version.
+the Free Software Foundation; either version 2 of the License, or
+(at your option) any later version.
-GDB is distributed in the hope that it will be useful,
+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 GDB; see the file COPYING. If not, write to
-the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
+along with this program; if not, write to the Free Software
+Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
-#include <stdio.h>
#include "defs.h"
-#include "param.h"
#include "frame.h"
#include "inferior.h"
#include "target.h"
+#include "gdbcmd.h"
#ifdef USG
#include <sys/types.h>
#include <sys/param.h>
#include <fcntl.h>
+#include <string.h>
#include "gdbcore.h"
-#ifdef STILL_NEEDED_FOR_DECSTATION
-#include <sys/dir.h> /* For DECstations */
-#include <sys/user.h> /* After a.out.h */
-#include <sys/file.h>
+#include <ctype.h>
+#include <sys/stat.h>
+#ifndef O_BINARY
+#define O_BINARY 0
#endif
-#include <sys/stat.h>
+/* Prototypes for local functions */
-extern char *getenv();
-extern void child_create_inferior (), child_attach ();
-extern void symbol_file_command ();
+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 *));
+
+extern int info_verbose;
/* The Binary File Descriptor handle for the executable file. */
bfd *exec_bfd = NULL;
-/* The base and bounds of the table of the exec file's sections. */
+/* Whether to open exec and core files read-only or read-write. */
+
+int write_files = 0;
-struct section_table *exec_sections, *exec_sections_end;
+/* Text start and end addresses (KLUDGE) if needed */
+
+#ifdef NEED_TEXT_START_END
+CORE_ADDR text_start = 0;
+CORE_ADDR text_end = 0;
+#endif
/* Forward decl */
extern struct target_ops exec_ops;
-void
+/* ARGSUSED */
+static void
exec_close (quitting)
int quitting;
{
bfd_close (exec_bfd);
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.
+
+ 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 (filename, from_tty)
- char *filename;
+exec_file_command (args, from_tty)
+ char *args;
int from_tty;
{
+ char **argv;
+ char *filename;
+
+ target_preopen (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 (args)
{
char *scratch_pathname;
int scratch_chan;
- filename = tilde_expand (filename);
+ /* Scan through the args and pick up the first non option arg
+ as the filename. */
+
+ if ((argv = buildargv (args)) == NULL)
+ {
+ nomem (0);
+ }
+ make_cleanup (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);
-/* FIXME, if writeable is set, open for read/write. */
- scratch_chan = openp (getenv ("PATH"), 1, filename, O_RDONLY, 0,
+ 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);
error ("\"%s\": not in executable format: %s.",
scratch_pathname, bfd_errmsg (bfd_error));
-#if FIXME
-/* This code needs to be incorporated into BFD */
-#ifdef COFF_ENCAPSULATE
- /* If we have a coff header, it can give us better values for
- text_start and exec_data_start. This is particularly useful
- for remote debugging of embedded systems. */
- if (N_FLAGS(exec_aouthdr) & N_FLAGS_COFF_ENCAPSULATE)
- {
- struct coffheader ch;
- int val;
- val = lseek (execchan, -(sizeof (AOUTHDR) + sizeof (ch)), 1);
- if (val == -1)
- perror_with_name (filename);
- val = myread (execchan, &ch, sizeof (ch));
- if (val < 0)
- perror_with_name (filename);
- text_start = ch.text_start;
- exec_data_start = ch.data_start;
- } else
-#endif
- {
- text_start =
- IS_OBJECT_FILE (exec_aouthdr) ? 0 : N_TXTADDR (exec_aouthdr);
- exec_data_start = IS_OBJECT_FILE (exec_aouthdr)
- ? exec_aouthdr.a_text : N_DATADDR (exec_aouthdr);
- }
-#endif FIXME
-
- if (build_section_table (exec_bfd, &exec_sections, &exec_sections_end))
+ if (build_section_table (exec_bfd, &exec_ops.to_sections,
+ &exec_ops.to_sections_end))
error ("Can't find the file sections in `%s': %s",
exec_bfd->filename, bfd_errmsg (bfd_error));
+#ifdef NEED_TEXT_START_END
+ /* This is a KLUDGE (FIXME) because a few places in a few ports
+ (29K springs to mind) need this info for now. */
+ {
+ struct section_table *p;
+ for (p = exec_ops.to_sections; p < exec_ops.to_sections_end; p++)
+ if (!strcmp (".text", bfd_section_name (p->bfd, p->sec_ptr)))
+ {
+ text_start = p->addr;
+ text_end = p->endaddr;
+ break;
+ }
+ }
+#endif
+
validate_files ();
push_target (&exec_ops);
What a novelty. Why did GDB go through four major releases before this
command was added? */
-void
+static void
file_command (arg, from_tty)
char *arg;
int from_tty;
}
\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. */
-void
-add_to_section_table (abfd, asect, table_pp)
+static void
+add_to_section_table (abfd, asect, table_pp_char)
bfd *abfd;
sec_ptr asect;
- struct section_table **table_pp;
+ PTR table_pp_char;
{
+ struct section_table **table_pp = (struct section_table **)table_pp_char;
flagword aflag;
aflag = bfd_get_section_flags (abfd, asect);
/* FIXME, we need to handle BSS segment here...it alloc's but doesn't load */
if (!(aflag & SEC_LOAD))
return;
+ if (0 == bfd_section_size (abfd, asect))
+ return;
+ (*table_pp)->bfd = abfd;
(*table_pp)->sec_ptr = 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;
unsigned count;
count = bfd_count_sections (some_bfd);
- if (count == 0)
- abort(); /* return 1? */
+ 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, end);
+ 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. */
\f
/* Read or write the exec file.
- Args are address within exec file, address within gdb address-space,
+ 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:
we just tail-call it with more arguments to select between them. */
int
-xfer_memory (memaddr, myaddr, len, write, abfd, sections, sections_end)
+xfer_memory (memaddr, myaddr, len, write, target)
CORE_ADDR memaddr;
char *myaddr;
int len;
int write;
- bfd *abfd;
- struct section_table *sections, *sections_end;
+ struct target_ops *target;
{
boolean res;
struct section_table *p;
CORE_ADDR nextsectaddr, memend;
- boolean (*xfer_fn) ();
+ boolean (*xfer_fn) PARAMS ((bfd *, sec_ptr, PTR, file_ptr, bfd_size_type));
if (len <= 0)
abort();
xfer_fn = write? bfd_set_section_contents: bfd_get_section_contents;
nextsectaddr = memend;
- for (p = sections; p < sections_end; p++)
+ for (p = target->to_sections; p < target->to_sections_end; p++)
{
if (p->addr <= memaddr)
if (p->endaddr >= memend)
{
/* Entire transfer is within this section. */
- res = xfer_fn (abfd, p->sec_ptr, myaddr, memaddr - p->addr, len);
+ res = xfer_fn (p->bfd, p->sec_ptr, myaddr, memaddr - p->addr, len);
return (res != false)? len: 0;
}
else if (p->endaddr <= memaddr)
{
/* This section overlaps the transfer. Just do half. */
len = p->endaddr - memaddr;
- res = xfer_fn (abfd, p->sec_ptr, myaddr, memaddr - p->addr, len);
+ res = xfer_fn (p->bfd, p->sec_ptr, myaddr, memaddr - p->addr, len);
return (res != false)? len: 0;
}
else if (p->addr < nextsectaddr)
return - (nextsectaddr - memaddr); /* Next boundary where we can help */
}
-/* The function called by target_xfer_memory via our target_ops */
-
-int
-exec_xfer_memory (memaddr, myaddr, len, write)
- CORE_ADDR memaddr;
- char *myaddr;
- int len;
- int write;
-{
- return xfer_memory (memaddr, myaddr, len, write,
- exec_bfd, exec_sections, exec_sections_end);
-}
-
-
#ifdef FIXME
#ifdef REG_STACK_SEGMENT
/* MOVE TO BFD... */
wanna_xfer = coredata;
}
#endif /* REG_STACK_SEGMENT */
-#endif FIXME
+#endif /* FIXME */
\f
-static void
-exec_files_info ()
+void
+print_section_info (t, abfd)
+ struct target_ops *t;
+ bfd *abfd;
{
struct section_table *p;
- printf ("\tExecutable file `%s'.\n", bfd_get_filename(exec_bfd));
+ printf_filtered ("\t`%s', ", bfd_get_filename(abfd));
+ wrap_here (" ");
+ printf_filtered ("file type %s.\n", bfd_get_target(abfd));
+
+ for (p = t->to_sections; p < t->to_sections_end; p++) {
+ printf_filtered ("\t%s", local_hex_string_custom (p->addr, "08"));
+ printf_filtered (" - %s", local_hex_string_custom (p->endaddr, "08"));
+ if (info_verbose)
+ printf_filtered (" @ %s",
+ local_hex_string_custom (p->sec_ptr->filepos, "08"));
+ printf_filtered (" is %s", bfd_section_name (p->bfd, p->sec_ptr));
+ 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);
+}
- for (p = exec_sections; p < exec_sections_end; p++)
- printf("\texecutable from 0x%08x to 0x%08x is %s\n",
- p->addr, p->endaddr,
- bfd_section_name (exec_bfd, p->sec_ptr));
+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->sec_ptr), seclen)
+ && bfd_section_name (exec_bfd, p->sec_ptr)[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);
}
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 */
- child_attach, 0, 0, 0, /* attach, detach, resume, wait, */
+ find_default_attach, 0, 0, 0, /* attach, detach, resume, wait, */
0, 0, /* fetch_registers, store_registers, */
- 0, 0, 0, /* prepare_to_store, conv_to, conv_from, */
- exec_xfer_memory, exec_files_info,
+ 0, /* prepare_to_store, */
+ xfer_memory, exec_files_info,
0, 0, /* insert_breakpoint, remove_breakpoint, */
0, 0, 0, 0, 0, /* terminal stuff */
- 0, 0, 0, 0, 0, /* kill, load, add_syms, call fn, lookup sym */
- child_create_inferior,
+ 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 */
};
is searched for a command of that name.\n\
No arg means have no executable file.");
+ 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);
}
projects / binutils.git / blobdiff