/* Dump Emacs in Mach-O format for use on Mac OS X.
- Copyright (C) 2001, 2002, 2003, 2004, 2005,
- 2006, 2007, 2008, 2009, 2010, 2011 Free Software Foundation, Inc.
+ Copyright (C) 2001-2013 Free Software Foundation, Inc.
This file is part of GNU Emacs.
be changed accordingly.
*/
-#include <stdio.h>
+/* config.h #define:s malloc/realloc/free and then includes stdlib.h.
+ We want the undefined versions, but if config.h includes stdlib.h
+ with the #define:s in place, the prototypes will be wrong and we get
+ warnings. To prevent that, include stdlib.h before config.h. */
+
#include <stdlib.h>
-#include <fcntl.h>
-#include <stdarg.h>
-#include <sys/types.h>
#include <config.h>
#undef malloc
#undef realloc
#undef free
+
+#include "unexec.h"
+
+#include <stdio.h>
+#include <fcntl.h>
+#include <stdarg.h>
+#include <sys/types.h>
#include <unistd.h>
#include <mach/mach.h>
#include <mach-o/loader.h>
#include <assert.h>
+/* LC_DATA_IN_CODE is not defined in mach-o/loader.h on OS X 10.7.
+ But it is used if we build with "Command Line Tools for Xcode 4.5
+ (OS X Lion) - September 2012". */
+#ifndef LC_DATA_IN_CODE
+#define LC_DATA_IN_CODE 0x29 /* table of non-instructions in __text */
+#endif
+
#ifdef _LP64
#define mach_header mach_header_64
#define segment_command segment_command_64
static struct segment_command *data_segment_scp;
-static void unexec_error (const char *format, ...) NO_RETURN;
-
/* Read N bytes from infd into memory starting at address DEST.
Return true if successful, false otherwise. */
static int
/* Debugging and informational messages routines. */
-static void
+static _Noreturn void
unexec_error (const char *format, ...)
{
va_list ap;
}
else
{
- r = (struct region_t *) malloc (sizeof (struct region_t));
+ r = malloc (sizeof *r);
if (!r)
unexec_error ("cannot allocate region structure");
{
num_unexec_regions = 0;
- emacs_zone->introspect->enumerator (mach_task_self(), 0,
+ emacs_zone->introspect->enumerator (mach_task_self (), 0,
MALLOC_PTR_REGION_RANGE_TYPE
| MALLOC_ADMIN_REGION_RANGE_TYPE,
(vm_address_t) emacs_zone,
case LC_DYLD_INFO_ONLY:
printf ("LC_DYLD_INFO_ONLY");
break;
+#endif
+#ifdef LC_VERSION_MIN_MACOSX
+ case LC_VERSION_MIN_MACOSX:
+ printf ("LC_VERSION_MIN_MACOSX");
+ break;
+#endif
+#ifdef LC_FUNCTION_STARTS
+ case LC_FUNCTION_STARTS:
+ printf ("LC_FUNCTION_STARTS");
+ break;
+#endif
+#ifdef LC_MAIN
+ case LC_MAIN:
+ printf ("LC_MAIN ");
+ break;
+#endif
+#ifdef LC_DATA_IN_CODE
+ case LC_DATA_IN_CODE:
+ printf ("LC_DATA_IN_CODE ");
+ break;
+#endif
+#ifdef LC_SOURCE_VERSION
+ case LC_SOURCE_VERSION:
+ printf ("LC_SOURCE_VERSION");
+ break;
+#endif
+#ifdef LC_DYLIB_CODE_SIGN_DRS
+ case LC_DYLIB_CODE_SIGN_DRS:
+ printf ("LC_DYLIB_CODE_SIGN_DRS");
+ break;
#endif
default:
printf ("unknown ");
#endif
nlc = mh.ncmds;
- lca = (struct load_command **) malloc (nlc * sizeof (struct load_command *));
+ lca = malloc (nlc * sizeof *lca);
for (i = 0; i < nlc; i++)
{
size first and then read the rest. */
if (!unexec_read (&lc, sizeof (struct load_command)))
unexec_error ("cannot read load command");
- lca[i] = (struct load_command *) malloc (lc.cmdsize);
+ lca[i] = malloc (lc.cmdsize);
memcpy (lca[i], &lc, sizeof (struct load_command));
if (!unexec_read (lca[i] + 1, lc.cmdsize - sizeof (struct load_command)))
unexec_error ("cannot read content of load command");
file. */
if (strncmp (sectp->sectname, SECT_DATA, 16) == 0)
{
- if (!unexec_write (sectp->offset, (void *) sectp->addr, sectp->size))
+ extern char my_edata[];
+ unsigned long my_size;
+
+ /* The __data section is basically dumped from memory. But
+ initialized data in statically linked libraries are
+ copied from the input file. In particular,
+ add_image_hook.names and add_image_hook.pointers stored
+ by libarclite_macosx.a, are restored so that they will be
+ reinitialized when the dumped binary is executed. */
+ my_size = (unsigned long)my_edata - sectp->addr;
+ if (!(sectp->addr <= (unsigned long)my_edata
+ && my_size <= sectp->size))
+ unexec_error ("my_edata is not in section %s", SECT_DATA);
+ if (!unexec_write (sectp->offset, (void *) sectp->addr, my_size))
unexec_error ("cannot write section %s", SECT_DATA);
+ if (!unexec_copy (sectp->offset + my_size, old_file_offset + my_size,
+ sectp->size - my_size))
+ unexec_error ("cannot copy section %s", SECT_DATA);
if (!unexec_write (header_offset, sectp, sizeof (struct section)))
unexec_error ("cannot write section %s's header", SECT_DATA);
}
{
sectp->flags = S_REGULAR;
if (!unexec_write (sectp->offset, (void *) sectp->addr, sectp->size))
- unexec_error ("cannot write section %s", sectp->sectname);
+ unexec_error ("cannot write section %.16s", sectp->sectname);
if (!unexec_write (header_offset, sectp, sizeof (struct section)))
- unexec_error ("cannot write section %s's header", sectp->sectname);
+ unexec_error ("cannot write section %.16s's header", sectp->sectname);
}
else if (strncmp (sectp->sectname, SECT_BSS, 16) == 0)
{
my_size = (unsigned long)my_endbss_static - sectp->addr;
if (!(sectp->addr <= (unsigned long)my_endbss_static
&& my_size <= sectp->size))
- unexec_error ("my_endbss_static is not in section %s",
+ unexec_error ("my_endbss_static is not in section %.16s",
sectp->sectname);
if (!unexec_write (sectp->offset, (void *) sectp->addr, my_size))
- unexec_error ("cannot write section %s", sectp->sectname);
+ unexec_error ("cannot write section %.16s", sectp->sectname);
if (!unexec_write_zero (sectp->offset + my_size,
sectp->size - my_size))
- unexec_error ("cannot write section %s", sectp->sectname);
+ unexec_error ("cannot write section %.16s", sectp->sectname);
if (!unexec_write (header_offset, sectp, sizeof (struct section)))
- unexec_error ("cannot write section %s's header", sectp->sectname);
+ unexec_error ("cannot write section %.16s's header", sectp->sectname);
}
else if (strncmp (sectp->sectname, "__la_symbol_ptr", 16) == 0
|| strncmp (sectp->sectname, "__nl_symbol_ptr", 16) == 0
+ || strncmp (sectp->sectname, "__got", 16) == 0
|| strncmp (sectp->sectname, "__la_sym_ptr2", 16) == 0
|| strncmp (sectp->sectname, "__dyld", 16) == 0
|| strncmp (sectp->sectname, "__const", 16) == 0
|| strncmp (sectp->sectname, "__cfstring", 16) == 0
|| strncmp (sectp->sectname, "__gcc_except_tab", 16) == 0
|| strncmp (sectp->sectname, "__program_vars", 16) == 0
+ || strncmp (sectp->sectname, "__mod_init_func", 16) == 0
+ || strncmp (sectp->sectname, "__mod_term_func", 16) == 0
|| strncmp (sectp->sectname, "__objc_", 7) == 0)
{
if (!unexec_copy (sectp->offset, old_file_offset, sectp->size))
- unexec_error ("cannot copy section %s", sectp->sectname);
+ unexec_error ("cannot copy section %.16s", sectp->sectname);
if (!unexec_write (header_offset, sectp, sizeof (struct section)))
- unexec_error ("cannot write section %s's header", sectp->sectname);
+ unexec_error ("cannot write section %.16s's header", sectp->sectname);
}
else
- unexec_error ("unrecognized section name in __DATA segment");
+ unexec_error ("unrecognized section %.16s in __DATA segment",
+ sectp->sectname);
printf (" section %-16.16s at %#8lx - %#8lx (sz: %#8lx)\n",
sectp->sectname, (long) (sectp->offset),
}
#endif
+#ifdef LC_FUNCTION_STARTS
+/* Copy a LC_FUNCTION_STARTS/LC_DATA_IN_CODE/LC_DYLIB_CODE_SIGN_DRS
+ load command from the input file to the output file, adjusting the
+ data offset field. */
+static void
+copy_linkedit_data (struct load_command *lc, long delta)
+{
+ struct linkedit_data_command *ldp = (struct linkedit_data_command *) lc;
+
+ if (ldp->dataoff > 0)
+ ldp->dataoff += delta;
+
+ printf ("Writing ");
+ print_load_command_name (lc->cmd);
+ printf (" command\n");
+
+ if (!unexec_write (curr_header_offset, lc, lc->cmdsize))
+ unexec_error ("cannot write linkedit data command to header");
+
+ curr_header_offset += lc->cmdsize;
+}
+#endif
+
/* Copy other kinds of load commands from the input file to the output
file, ones that do not require adjustments of file offsets. */
static void
case LC_DYLD_INFO_ONLY:
copy_dyld_info (lca[i], linkedit_delta);
break;
+#endif
+#ifdef LC_FUNCTION_STARTS
+ case LC_FUNCTION_STARTS:
+#ifdef LC_DATA_IN_CODE
+ case LC_DATA_IN_CODE:
+#endif
+#ifdef LC_DYLIB_CODE_SIGN_DRS
+ case LC_DYLIB_CODE_SIGN_DRS:
+#endif
+ copy_linkedit_data (lca[i], linkedit_delta);
+ break;
#endif
default:
copy_other (lca[i]);
from it. The file names of the output and input files are outfile
and infile, respectively. The three other parameters are
ignored. */
-int
+void
unexec (const char *outfile, const char *infile)
{
if (in_dumped_exec)
dump_it ();
close (outfd);
- return 0;
}
size_t old_size = ((unexec_malloc_header_t *) old_ptr)[-1].u.size;
size_t size = new_size > old_size ? old_size : new_size;
- p = (size_t *) malloc (new_size);
+ p = malloc (new_size);
if (size)
memcpy (p, old_ptr, size);
}
else
malloc_zone_free (emacs_zone, (unexec_malloc_header_t *) ptr - 1);
}
-
HCoop / bpt / emacs.git / blobdiff