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authorJohn Polstra <jdp@FreeBSD.org>1997-12-23 05:35:56 +0000
committerJohn Polstra <jdp@FreeBSD.org>1997-12-23 05:35:56 +0000
commitb7fa3dd64d055ca7c992d3a9944bfa1982fd686c (patch)
tree5896cf1f5b93cb79af9eafc3dc59d6047e4d4ad1 /editors/emacs22
parentf5b4701175884c32c1e607581c10dc35d58010bd (diff)
downloadports-b7fa3dd64d055ca7c992d3a9944bfa1982fd686c.tar.gz
ports-b7fa3dd64d055ca7c992d3a9944bfa1982fd686c.zip
Notes
Diffstat (limited to 'editors/emacs22')
-rw-r--r--editors/emacs22/files/patch-ac13
-rw-r--r--editors/emacs22/files/patch-ad695
2 files changed, 706 insertions, 2 deletions
diff --git a/editors/emacs22/files/patch-ac b/editors/emacs22/files/patch-ac
index 0c0a713b1c55..525f8de259f3 100644
--- a/editors/emacs22/files/patch-ac
+++ b/editors/emacs22/files/patch-ac
@@ -1,5 +1,5 @@
---- src/s/freebsd.h.orig Mon Jun 10 04:14:32 1996
-+++ src/s/freebsd.h Mon May 26 21:21:55 1997
+--- src/s/freebsd.h.orig Sun Jun 9 13:14:32 1996
++++ src/s/freebsd.h Wed Dec 3 17:36:40 1997
@@ -33,9 +33,16 @@
#define LIBS_DEBUG
@@ -18,6 +18,15 @@
#define SYSV_SYSTEM_DIR
/* freebsd has POSIX-style pgrp behavior. */
+@@ -46,7 +53,7 @@
+ #define LD_SWITCH_SYSTEM -e start -dc -dp
+ #define HAVE_TEXT_START /* No need to define `start_of_text'. */
+ #define START_FILES pre-crt0.o /usr/lib/crt0.o
+-#define UNEXEC unexsunos4.o
++#define UNEXEC unexfreebsd.o
+ #define RUN_TIME_REMAP
+
+ #ifndef N_TRELOFF
@@ -80,6 +87,8 @@
#define BSD 199103
#elif __FreeBSD__ == 2
diff --git a/editors/emacs22/files/patch-ad b/editors/emacs22/files/patch-ad
new file mode 100644
index 000000000000..f2013a374044
--- /dev/null
+++ b/editors/emacs22/files/patch-ad
@@ -0,0 +1,695 @@
+--- src/unexfreebsd.c.orig Wed Dec 3 17:28:14 1997
++++ src/unexfreebsd.c Wed Dec 3 17:34:02 1997
+@@ -0,0 +1,692 @@
++/* Code to do an unexec for FreeBSD for a temacs linked -Bdynamic.
++ Derived from unexnetbsd.c, which was derived from unexsunos4.c
++ Copyright (C) 1992, 1993 Free Software Foundation, Inc.
++
++This file is part of XEmacs.
++
++XEmacs 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, or (at your option) any
++later version.
++
++XEmacs 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 XEmacs; see the file COPYING. If not, write to
++the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
++Boston, MA 02111-1307, USA. */
++
++/* Synched up with: Not in FSF? */
++
++/*
++Created 29-Oct-92 by Harlan Sexton
++Tweaked 06-Aug-93 by Dean Michaels to work with sun3.
++Converted 01-Dec-93 by Paul Mackerras to work with NetBSD shared libraries.
++Tweaked 26-Feb-94 by Shawn Carey for use with FreeBSD-1.1 shared libraries.
++*/
++
++/********************** Included .h Files **************************/
++
++#include <config.h>
++
++#include <stdarg.h>
++#include <sys/param.h>
++#include <sys/mman.h>
++#include <sys/file.h>
++#include <sys/stat.h>
++#include <sys/types.h>
++#include <string.h>
++#include <stdio.h>
++#include <a.out.h>
++#include <unistd.h>
++#include <ctype.h>
++#include <stab.h>
++#include <dirent.h>
++#include <link.h>
++
++/********************** Macros *************************************/
++
++#define SYS_ERR strerror(errno)
++
++#define MASK_UP(x,p_of_two) \
++ ((((unsigned long) (x)) + ((p_of_two) - 1)) & (~((p_of_two) - 1)))
++
++#define MASK_DOWN(x,p_of_two) (((unsigned long) (x)) & (~((p_of_two) - 1)))
++
++/********************** Typedefs and Structs ***********************/
++
++struct translation_struct
++{
++ long txtaddr;
++ long txtoff;
++ long dataddr;
++ long datoff;
++ long bssaddr;
++ long endaddr;
++};
++
++/********************** Function Prototypes/Declarations ***********/
++
++static void unexec_error (const char *m, int use_errno, ...);
++static int unexec_open (char *filename, int flag, int mode);
++static caddr_t unexec_mmap (int fd, size_t len, int prot, int flags);
++static long unexec_seek (int fd, long position);
++static void unexec_read (int fd, long position, char *buf, int bytes);
++static void unexec_write (int fd, long position, char *buf, int bytes);
++static void unexec_pad (int fd, int bytes);
++static void unexec_fstat (int fd, struct stat *statptr);
++static void unexec_fchmod (int fd, int mode);
++static long unexec_addr_to_offset (long addr, struct translation_struct *ts);
++static void copy_relocation_site (struct relocation_info *ri,
++ caddr_t from_base_addr,
++ caddr_t to_base_addr,
++ struct translation_struct *ts);
++static void reset_symtab (struct nlist *start, struct nlist *end,
++ char *strtab, long edata_value, long end_value,
++ int shlib_image);
++static void reset_ldso_symtab (struct nzlist *start, struct nzlist *end,
++ char *strtab, long edata_value, long end_value,
++ int shlib_image);
++int run_time_remap (char *dummy);
++
++/********************** Variables **********************************/
++
++/* for reporting error messages from system calls */
++extern int errno;
++extern int _DYNAMIC;
++extern char **environ;
++
++static unsigned long sbrk_of_0_at_unexec;
++
++/*******************************************************************/
++
++static void
++unexec_error (const char *fmt, int use_errno, ...)
++{
++ const char *err_msg = SYS_ERR;
++ va_list args;
++
++ fprintf (stderr, "unexec - ");
++ va_start (args, use_errno);
++ vfprintf (stderr, fmt, args);
++ va_end (args);
++
++ if (use_errno)
++ fprintf (stderr, ": %s", err_msg);
++ fprintf (stderr, "\n");
++ exit (1);
++ return;
++}
++
++static int
++unexec_open (char *filename, int flag, int mode)
++{
++ int fd;
++
++ errno = 0;
++
++ fd = open (filename, flag, mode);
++
++ if (fd < 0)
++ unexec_error ("Failure opening file %s", 1, filename);
++ return fd;
++}
++
++static caddr_t
++unexec_mmap (int fd, size_t len, int prot, int flags)
++{
++ caddr_t return_val;
++
++ unexec_seek (fd, 0);
++ errno = 0;
++ return_val = mmap (0, len, prot, flags, fd, 0);
++
++ if (return_val == (caddr_t) -1)
++ unexec_error ("Failure mmap'ing file", 1);
++ return return_val;
++}
++
++
++static long
++unexec_seek (int fd, long position)
++{
++ long seek_value;
++
++ if (fd <= 0)
++ unexec_error ("No file open in which to seek", 0);
++
++ errno = 0;
++
++ if (position < 0)
++ seek_value = (long) lseek (fd, 0, L_INCR);
++ else
++ seek_value = (long) lseek (fd, position, L_SET);
++
++ if (seek_value < 0)
++ unexec_error ("Failed to do a seek to 0x%x in %s", 1,
++ position, "unexec() output file");
++
++ return seek_value;
++}
++
++static void
++unexec_read (int fd, long position, char *buf, int bytes)
++{
++ int n_read;
++ int remains = bytes;
++ position = unexec_seek (fd, position);
++
++ if (bytes < 0)
++ unexec_error ("Attempted read of %d bytes", 0, bytes);
++
++ errno = 0;
++
++ while (remains > 0)
++ {
++ n_read = read (fd, buf, remains);
++ if (n_read <= 0)
++ unexec_error ("Read failed for 0x%x bytes at offset 0x%x in %s",
++ 1, bytes, position, "unexec() output file");
++ buf += n_read;
++ remains -= n_read;
++ }
++
++ return;
++}
++
++static void
++unexec_write (int fd, long position, char *buf, int bytes)
++{
++ int n_written;
++ int remains = bytes;
++ position = unexec_seek (fd, position);
++
++ if (bytes < 0)
++ unexec_error ("Attempted write of %d bytes in %s",
++ 0, bytes, "unexec() output file");
++
++ errno = 0;
++
++ while (remains > 0)
++ {
++ n_written = write (fd, buf, remains);
++ if (n_written <= 0)
++ unexec_error ("Write failed for 0x%x bytes at offset 0x%x in %s",
++ 1, bytes, position, "unexec() output file");
++ buf += n_written;
++ remains -= n_written;
++ }
++
++ return;
++}
++
++static void
++unexec_pad (int fd, int bytes)
++{
++ if (bytes > 0)
++ {
++ char buf[1024];
++ int remaining = bytes;
++
++ memset (buf, 0, sizeof (buf));
++
++ while (remaining > 0)
++ {
++ int this_write = (remaining > sizeof(buf))?sizeof(buf):remaining;
++ unexec_write (fd, -1, buf, this_write);
++ remaining -= this_write;
++ }
++ }
++}
++
++static void
++unexec_fstat (int fd, struct stat *statptr)
++{
++ errno = 0;
++ if (-1 == fstat (fd, statptr))
++ unexec_error ("fstat() failed for descriptor %d", 1, fd);
++ return;
++}
++
++static void
++unexec_fchmod (int fd, int mode)
++{
++ errno = 0;
++ if (-1 == fchmod (fd, mode))
++ unexec_error ("fchmod() failed for descriptor %d", 1, fd);
++ return;
++}
++
++static long
++unexec_addr_to_offset (long addr, struct translation_struct *ts)
++
++{
++ if ((addr < ts->txtaddr) || (addr >= ts->bssaddr))
++ return -1;
++ else if (addr >= ts->dataddr)
++ return ((long) ((addr - ts->dataddr) + ts->datoff));
++ else
++ return ((long) ((addr - ts->txtaddr) + ts->txtoff));
++}
++
++
++/*
++ * "LD.SO" DATA AND SYMBOL TABLE OPERATIONS
++ */
++
++static void
++copy_relocation_site (struct relocation_info *ri,
++ caddr_t from_base_addr,
++ caddr_t to_base_addr,
++ struct translation_struct *ts)
++{
++ long offset;
++ caddr_t from, to;
++
++ /* We can get relocation sites in the bss region, for objects whose
++ contents are copied from a shared library. We don't need or want
++ to restore these at present. */
++#ifndef sparc
++ if (ri->r_copy)
++ return;
++#else
++ /* Struct relocation_info_sparc doesn't have member r_copy.
++ Instead, we use the address to check if this is run-time-copied. */
++ if (ri->r_address >= ts->bssaddr && ri->r_address < ts->endaddr)
++ return;
++#endif
++
++ offset = unexec_addr_to_offset (ri->r_address, ts);
++ if (offset == -1)
++ unexec_error ("bad relocation address 0x%x (0x%x)", 0, ri->r_address,
++ ((long *)ri)[1]);
++
++ from = from_base_addr + offset;
++ to = to_base_addr + offset;
++ /* This stuff should be in a md_ file somewhere... */
++#ifndef sparc
++ switch (ri->r_length)
++ {
++ case 0:
++ *((char *) to) = *((char *) from);
++ break;
++ case 1:
++ *((short *) to) = *((short *) from);
++ break;
++ case 2:
++ *((long *) to) = *((long *) from);
++ break;
++ default:
++ unexec_error ("unknown reloc length %d seen during unexec()",
++ 0, ri->r_length);
++ break;
++ }
++#else /* sparc */
++ switch (ri->r_type)
++ {
++ case RELOC_8:
++ case RELOC_DISP8:
++ *((char *) to) = *((char *) from);
++ break;
++ case RELOC_16:
++ case RELOC_DISP16:
++ *((short *) to) = *((short *) from);
++ break;
++ case RELOC_LO10:
++ case RELOC_13:
++ case RELOC_22:
++ case RELOC_HI22:
++ case RELOC_WDISP22:
++ case RELOC_WDISP30:
++ case RELOC_32:
++ case RELOC_DISP32:
++ case RELOC_GLOB_DAT:
++ *((long *) to) = *((long *) from);
++ break;
++ case RELOC_JMP_SLOT:
++ {
++ long *target = (long *) to;
++ long *source = (long *) from;
++ *target = *source;
++ target++;
++ source++;
++ *target = *source;
++ target++;
++ source++;
++ *target = *source;
++ }
++ break;
++ default:
++ unexec_error ("unknown reloc type %d seen during unexec()",
++ 0, ri->r_type);
++ break;
++ }
++#endif /* sparc */
++}
++
++static void
++reset_symtab (struct nlist *start, struct nlist *end, char *strtab,
++ long edata_value, long end_value, int shlib_image)
++{
++ struct nlist *tmp = start;
++ int found_edata = 0;
++ int found_end = 0;
++
++ while (tmp < end)
++ {
++ int type = tmp->n_type;
++
++ if ((type == (N_UNDF | N_EXT)) &&
++ (tmp->n_value != 0))
++ unexec_error ("unexec'ing image has COMMON symbols in it -- we quit!",
++ 0);
++
++ if (!(type & N_STAB))
++ {
++ if (!found_edata &&
++ (type == (N_EXT | N_DATA)) &&
++ tmp->n_un.n_strx &&
++ !strcmp ("_edata", strtab + tmp->n_un.n_strx))
++ {
++ tmp->n_value = edata_value;
++ found_edata = 1;
++ }
++
++
++ if ((type & N_TYPE) == N_BSS)
++ {
++ if (!found_end &&
++ (type == (N_EXT | N_BSS)) &&
++ tmp->n_un.n_strx &&
++ !strcmp ("_end", strtab + tmp->n_un.n_strx))
++ {
++ tmp->n_value = end_value;
++ found_end = 1;
++ }
++ else if (type & N_EXT)
++ tmp->n_type = N_DATA | N_EXT;
++ else
++ tmp->n_type = N_DATA;
++ }
++
++ /* the way things are being handled here, having sbrk() in the
++ image is fatal for an image linked with shared lib's (although
++ the code could be modified to support it), but this should
++ never happen anyway */
++ if (shlib_image &&
++ (type == (N_EXT | N_TEXT)) &&
++ tmp->n_un.n_strx &&
++ !strcmp ("_sbrk", strtab + tmp->n_un.n_strx))
++ unexec_error ("unexec'd shlib image has sbrk() in it -- we quit!",
++ 0);
++ }
++
++ tmp++;
++ }
++}
++
++static void
++reset_ldso_symtab (struct nzlist *start, struct nzlist *end, char *strtab,
++ long edata_value, long end_value, int shlib_image)
++{
++ struct nzlist *tmp = start;
++ int found_edata = 0;
++ int found_end = 0;
++
++ while (tmp < end) {
++ int type = tmp->nz_type;
++/*
++ * the following code breaks under FreeBSD-1.1-BETA, but everything
++ * seems to work perfectly if it's commented out. This did not break
++ * anything until the changes to ld.so were made.
++ */
++/*
++ if ((type == (N_UNDF | N_EXT)) && (tmp->nz_value != 0))
++ unexec_error("unexec'ing image has COMMON symbols in rel -- we quit!",0);
++*/
++ if (!(type & N_STAB)) {
++ if (!found_edata &&
++ (type == (N_EXT | N_DATA)) &&
++ !strcmp ("_edata", strtab + tmp->nz_strx)) {
++ tmp->nz_value = edata_value;
++ found_edata = 1;
++ }
++
++ if ((type & N_TYPE) == N_BSS) {
++ if (!found_end &&
++ (type == (N_EXT | N_BSS)) &&
++ !strcmp ("_end", strtab + tmp->nz_strx)) {
++ tmp->nz_value = end_value;
++ found_end = 1;
++ } else if (type & N_EXT)
++ tmp->nz_type = N_DATA | N_EXT;
++ else
++ tmp->nz_type = N_DATA;
++ }
++
++ /* the way things are being handled here, having sbrk() in the
++ image is fatal for an image linked with shared lib's (although
++ the code could be modified to support it), but this should
++ never happen anyway */
++ if (shlib_image &&
++ (type == (N_EXT | N_TEXT)) &&
++ !strcmp ("_sbrk", strtab + tmp->nz_strx))
++ unexec_error("unexec'd shlib image has sbrk() ref -- we quit!", 0);
++ }
++ tmp++;
++ }
++}
++
++extern int getpagesize (void);
++
++/*
++ * EXPORTED FUNCTIONS
++ */
++
++/* this has to be a global variable to prevent the optimizers from
++ * assuming that it can not be 0.
++*/
++static void *dynamic_addr = (void *) &_DYNAMIC;
++
++int
++unexec (char *new_name, char *old_name,
++ unsigned int emacs_edata, unsigned int dummy1, unsigned int dummy2)
++{
++ /* ld.so data */
++ struct _dynamic *ld = 0;
++ struct section_dispatch_table *ld2 = 0;
++ /* old and new state */
++ int old_fd;
++ int new_fd;
++ caddr_t old_base_addr;
++ caddr_t new_base_addr;
++ struct exec old_hdr;
++ struct exec new_hdr;
++ struct stat old_buf;
++ struct stat new_buf;
++ /* some process specific "constants" */
++ unsigned long n_pagsiz, new_edata;
++ long page_size = getpagesize ();
++ caddr_t plt_end;
++ caddr_t current_break = (caddr_t) sbrk (0);
++
++ if (!page_size)
++ unexec_error ("unexec() failed because we can't get the size of a page!",
++ 0);
++
++ /* see if this is a -Bdynamic image -- if so, find ld.so structures */
++ if (dynamic_addr)
++ {
++ ld = (struct _dynamic *) dynamic_addr;
++ ld2 = ld->d_un.d_sdt;
++ if (ld->d_version < LD_VERSION_BSD)
++ unexec_error ("%s linked with obsolete version of ld -- we quit!",
++ 0, old_name);
++ }
++
++ /* open the old and new files, figuring out how big the old one is
++ so that we can map it in */
++ old_fd = unexec_open (old_name, O_RDONLY, 0);
++ new_fd = unexec_open (new_name, O_RDWR | O_CREAT | O_TRUNC, 0666);
++
++ /* setup the header and the statbuf for old_fd */
++ unexec_read (old_fd, 0, (char *) &old_hdr, sizeof (old_hdr));
++ unexec_fstat (old_fd, &old_buf);
++
++
++ /* set up some important constants */
++ n_pagsiz = __LDPGSZ;
++ if (dynamic_addr)
++ plt_end = (caddr_t) MASK_UP (ld2->sdt_plt + ld2->sdt_plt_sz, sizeof (double));
++ else
++ plt_end = (caddr_t) N_DATADDR (old_hdr);
++
++#if 0
++ /* never write protect the variable "environ", defined in /lib/crt0.o, and
++ set in process.c and callproc.c */
++ mprotect_bottom_addr = ((unsigned long) &environ) + sizeof (char **);
++ /* never protect ABOVE the end of data emacs_edata specified */
++ mprotect_top_addr = MIN (emacs_edata, N_DATADDR (old_hdr) + old_hdr.a_data);
++#endif
++
++ /* Set up the image of the old file */
++ old_base_addr = unexec_mmap (old_fd, old_buf.st_size, PROT_READ,
++ MAP_FILE | MAP_PRIVATE);
++ close (old_fd);
++
++ /* set up the new exec */
++ new_hdr = old_hdr;
++ new_edata = (unsigned long) MASK_UP (current_break, n_pagsiz);
++ new_hdr.a_data = new_edata - ((unsigned long) N_DATADDR (old_hdr));
++ new_hdr.a_bss = 0;
++
++ /* set up this variable, in case we want to reset "the break"
++ when restarting */
++ sbrk_of_0_at_unexec = ((unsigned long) MASK_UP (current_break, n_pagsiz));
++
++ /* Write out the first approximation to the new file. The sizes of
++ each section will be correct, but there will be a number of
++ corrections that will need to be made. */
++ {
++ long old_datoff = N_DATOFF (old_hdr);
++ long old_dataddr = N_DATADDR (old_hdr);
++ long new_treloff = N_RELOFF (new_hdr);
++ long old_treloff = N_RELOFF (old_hdr);
++ long ld_so_size = ((unsigned long) plt_end) - old_dataddr;
++ long real_data_size = current_break - plt_end;
++ long pad_size =
++ MASK_UP (current_break, n_pagsiz) - ((unsigned long) current_break);
++
++
++ /* First, write the text segment with new header -- copy everything until
++ the start of the data segment from the old file, and then go back and
++ write the new header. */
++ unexec_write (new_fd, 0, old_base_addr, old_datoff + ld_so_size);
++ unexec_write (new_fd, 0, (char *) &new_hdr, sizeof (new_hdr));
++
++ /* Copy the rest of the data segment from the running image. */
++ unexec_write (new_fd, old_datoff + ld_so_size,
++ plt_end, real_data_size);
++
++ /* pad out the data segment */
++ unexec_pad (new_fd, pad_size);
++
++ /* Finally, copy the symbol table information from the old file. */
++ unexec_write (new_fd, new_treloff,
++ old_base_addr + old_treloff,
++ old_buf.st_size - old_treloff);
++ }
++
++
++ /* Next, map in the output file so that we can jump around fixing it
++ up. We retain the old file so that we can refer to it. */
++ unexec_fstat (new_fd, &new_buf);
++ new_base_addr = unexec_mmap (new_fd,
++ MASK_UP (new_buf.st_size, page_size),
++ PROT_READ | PROT_WRITE,
++ MAP_FILE | MAP_SHARED);
++
++
++
++ /* We need to do 2 things. First, make sure that _edata and _end (and
++ hence, curbrk) are set to the correct values. At the same time, for
++ neatness and to help with debugging, mark all the types of all ld.so
++ and nm BSS symbols in the new file to be DATA, and make sure that
++ there are no COMMON symbols in the output file, as any references to
++ these can lose really big. Second, reset all of the ld.so "relocation
++ sites" in the new file to have the values that appear in the old file
++ -- the failure to do this was the biggest loser in the old version of
++ this code. */
++
++ /* STEP 1 */
++ /* Reset the regular symbol table first. */
++ reset_symtab ((struct nlist *) (new_base_addr + N_SYMOFF(new_hdr)),
++ (struct nlist *) (new_base_addr + N_SYMOFF(new_hdr) +
++ new_hdr.a_syms),
++ (char *) (new_base_addr + N_STROFF(new_hdr)),
++ new_edata, new_edata,
++ !!dynamic_addr);
++
++ /* Now reset the ld.so symbol table. */
++ if (dynamic_addr)
++ {
++ struct translation_struct ts;
++ struct relocation_info *tmp, *end;
++ caddr_t syms, strings;
++
++ /* set up the structure that we use to translate addresses in the
++ old file into file offsets */
++ ts.txtaddr = N_TXTADDR (old_hdr);
++ ts.txtoff = N_TXTOFF (old_hdr);
++ ts.dataddr = N_DATADDR (old_hdr);
++ ts.datoff = N_DATOFF (old_hdr);
++ ts.bssaddr = N_DATADDR (old_hdr) + old_hdr.a_data;
++ ts.endaddr = ts.bssaddr + old_hdr.a_bss;
++
++ syms = new_base_addr + unexec_addr_to_offset(ld2->sdt_nzlist, &ts);
++ strings = new_base_addr + unexec_addr_to_offset(ld2->sdt_strings, &ts);
++ reset_ldso_symtab ((struct nzlist *) syms, (struct nzlist *) strings,
++ (char *) strings,
++ new_edata, new_edata,
++ !!dynamic_addr);
++
++ /* STEP 2 */
++ tmp = (struct relocation_info *)
++ (old_base_addr + unexec_addr_to_offset(ld2->sdt_rel, &ts));
++ end = (struct relocation_info *)
++ (old_base_addr + unexec_addr_to_offset(ld2->sdt_hash, &ts));
++ while (tmp < end)
++ {
++ copy_relocation_site (tmp, old_base_addr, new_base_addr, &ts);
++ tmp++;
++ }
++ }
++
++ /* get rid of the mmap-ed file space and make the output file
++ executable -- then quit */
++ munmap (new_base_addr, MASK_UP (new_buf.st_size, page_size));
++ munmap (old_base_addr, MASK_UP (old_buf.st_size, page_size));
++ unexec_fchmod (new_fd, 0755);
++ close (new_fd);
++ return 0;
++}
++
++
++int
++run_time_remap (char *dummy)
++{
++ unsigned long current_sbrk = (unsigned long) sbrk (0);
++
++ if (sbrk_of_0_at_unexec > current_sbrk)
++ {
++ errno = 0;
++ if (brk ((caddr_t) sbrk_of_0_at_unexec))
++ fprintf (stderr, "failed to change brk addr to 0x%lx: %s\n",
++ sbrk_of_0_at_unexec, SYS_ERR);
++ }
++
++ return 0;
++}