/* Dump Emacs in Mach-O format for use on Mac OS X.
- Copyright (C) 2001-2012 Free Software Foundation, Inc.
+ Copyright (C) 2001-2015 Free Software Foundation, Inc.
This file is part of GNU Emacs.
#undef free
#include "unexec.h"
+#include "lisp.h"
#include <stdio.h>
#include <fcntl.h>
#include <mach/mach.h>
#include <mach-o/loader.h>
#include <mach-o/reloc.h>
-#if defined (__ppc__)
-#include <mach-o/ppc/reloc.h>
-#endif
#ifdef HAVE_MALLOC_MALLOC_H
#include <malloc/malloc.h>
#else
#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
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 ");
file. */
if (strncmp (sectp->sectname, SECT_DATA, 16) == 0)
{
- if (!unexec_write (sectp->offset, (void *) sectp->addr, sectp->size))
+ 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);
}
}
else if (strncmp (sectp->sectname, SECT_BSS, 16) == 0)
{
- extern char *my_endbss_static;
unsigned long my_size;
sectp->flags = S_REGULAR;
if (!unexec_write (header_offset, sectp, sizeof (struct section)))
unexec_error ("cannot write section %.16s's header", sectp->sectname);
}
+ else if (strncmp (sectp->sectname, "__bss", 5) == 0
+ || strncmp (sectp->sectname, "__pu_bss", 8) == 0)
+ {
+ sectp->flags = S_REGULAR;
+
+ /* These sections are produced by GCC 4.6+.
+
+ FIXME: We possibly ought to clear uninitialized local
+ variables in statically linked libraries like for
+ SECT_BSS (__bss) above, but setting up the markers we
+ need in lastfile.c would be rather messy. See
+ darwin_output_aligned_bss () in gcc/config/darwin.c for
+ the root of the problem, keeping in mind that the
+ sections are numbered by their alignment in GCC 4.6, but
+ by log2(alignment) in GCC 4.7. */
+
+ if (!unexec_write (sectp->offset, (void *) sectp->addr, sectp->size))
+ unexec_error ("cannot copy section %.16s", sectp->sectname);
+ if (!unexec_write (header_offset, sectp, sizeof (struct section)))
+ 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, "__program_vars", 16) == 0
|| strncmp (sectp->sectname, "__mod_init_func", 16) == 0
|| strncmp (sectp->sectname, "__mod_term_func", 16) == 0
+ || strncmp (sectp->sectname, "__static_data", 16) == 0
|| strncmp (sectp->sectname, "__objc_", 7) == 0)
{
if (!unexec_copy (sectp->offset, old_file_offset, sectp->size))
name, i, reloc_info.r_type);
}
else
- switch (sc_reloc_info->r_type)
- {
-#if defined (__ppc__)
- case PPC_RELOC_PB_LA_PTR:
- /* nothing to do for prebound lazy pointer */
- break;
-#endif
- default:
- unexec_error ("unrelocate: %s:%d cannot handle scattered type = %d",
- name, i, sc_reloc_info->r_type);
- }
+ unexec_error ("unrelocate: %s:%d cannot handle scattered type = %d",
+ name, i, sc_reloc_info->r_type);
}
if (nrel > 0)
unreloc_count, nrel, name);
}
-#if __ppc64__
-/* Rebase r_address in the relocation table. */
-static void
-rebase_reloc_address (off_t reloff, int nrel, long linkedit_delta, long diff)
-{
- int i;
- struct relocation_info reloc_info;
- struct scattered_relocation_info *sc_reloc_info
- = (struct scattered_relocation_info *) &reloc_info;
-
- for (i = 0; i < nrel; i++, reloff += sizeof (reloc_info))
- {
- if (lseek (infd, reloff - linkedit_delta, L_SET)
- != reloff - linkedit_delta)
- unexec_error ("rebase_reloc_table: cannot seek to reloc_info");
- if (!unexec_read (&reloc_info, sizeof (reloc_info)))
- unexec_error ("rebase_reloc_table: cannot read reloc_info");
-
- if (sc_reloc_info->r_scattered == 0
- && reloc_info.r_type == GENERIC_RELOC_VANILLA)
- {
- reloc_info.r_address -= diff;
- if (!unexec_write (reloff, &reloc_info, sizeof (reloc_info)))
- unexec_error ("rebase_reloc_table: cannot write reloc_info");
- }
- }
-}
-#endif
-
/* Copy a LC_DYSYMTAB load command from the input file to the output
file, adjusting the file offset fields. */
static void
vm_address_t base;
#ifdef _LP64
-#if __ppc64__
- {
- int i;
-
- base = 0;
- for (i = 0; i < nlc; i++)
- if (lca[i]->cmd == LC_SEGMENT)
- {
- struct segment_command *scp = (struct segment_command *) lca[i];
-
- if (scp->vmaddr + scp->vmsize > 0x100000000
- && (scp->initprot & VM_PROT_WRITE) != 0)
- {
- base = data_segment_scp->vmaddr;
- break;
- }
- }
- }
-#else
/* First writable segment address. */
base = data_segment_scp->vmaddr;
-#endif
#else
/* First segment address in the file (unless MH_SPLIT_SEGS set). */
base = 0;
unexec_error ("cannot write symtab command to header");
curr_header_offset += lc->cmdsize;
-
-#if __ppc64__
- /* Check if the relocation base needs to be changed. */
- if (base == 0)
- {
- vm_address_t newbase = 0;
- int i;
-
- for (i = 0; i < num_unexec_regions; i++)
- if (unexec_regions[i].range.address + unexec_regions[i].range.size
- > 0x100000000)
- {
- newbase = data_segment_scp->vmaddr;
- break;
- }
-
- if (newbase)
- {
- rebase_reloc_address (dstp->locreloff, dstp->nlocrel, delta, newbase);
- rebase_reloc_address (dstp->extreloff, dstp->nextrel, delta, newbase);
- }
- }
-#endif
}
/* Copy a LC_TWOLEVEL_HINTS load command from the input file to the output
#endif
#ifdef LC_FUNCTION_STARTS
-/* Copy a LC_FUNCTION_STARTS load command from the input file to the
- output file, adjusting the data offset field. */
+/* 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)
{
#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
}
if (curr_header_offset > text_seg_lowest_offset)
- unexec_error ("not enough room for load commands for new __DATA segments");
+ unexec_error ("not enough room for load commands for new __DATA segments"
+ " (increase headerpad_extra in configure.in to at least %lX)",
+ num_unexec_regions * sizeof (struct segment_command));
printf ("%ld unused bytes follow Mach-O header\n",
text_seg_lowest_offset - curr_header_offset);
unexec_error ("Unexec from a dumped executable is not supported.");
pagesize = getpagesize ();
- infd = open (infile, O_RDONLY, 0);
+ infd = emacs_open (infile, O_RDONLY, 0);
if (infd < 0)
{
unexec_error ("cannot open input file `%s'", infile);
}
- outfd = open (outfile, O_WRONLY | O_TRUNC | O_CREAT, 0755);
+ outfd = emacs_open (outfile, O_WRONLY | O_TRUNC | O_CREAT, 0777);
if (outfd < 0)
{
- close (infd);
+ emacs_close (infd);
unexec_error ("cannot open output file `%s'", outfile);
}
dump_it ();
- close (outfd);
+ emacs_close (outfd);
}