GNU Emacs for 4D machines

Tue Apr 11 01:53:21 AEST 1989

Well, the way I did it was to grab the distribution off of uunet.uu.net
(anonymous FTP) and then use the header files which were posted here
a few months ago INSTEAD OF THOSE IN THE DISTRIBUTION. Here's the
README from my emacs source directory, and a shell script to unpack the 
header files. Once you do all that's said in the readme, you should have
a running emacs. Good luck.

--------------/usr/local/emacs/src/README ---------------------------
In order to get emacs to compile on the Irises, one must:
substitute the .h and .c files in this directory for the ones that
come with emacs.

edit config.h-dist to use these headerfiles, and save it to config.h

edit etc/Makefile to use 
CFLAGS=-g -I/usr/include/bsd
LOADLIBES=-lmld

then make from the top directory

---------sgiemacs.shar---------------------------------------------------

#!/bin/sh
# This is a shell archive.  Remove anything before this line, then
# unpack it by saving it in a file and typing "sh file".  (Files
# unpacked will be owned by you and have default permissions.)
#
# This archive contains:
# s-iris3-6.h m-iris4d.h unexmips.c

echo x - s-iris3-6.h
cat > "s-iris3-6.h" << '//E*O*F s-iris3-6.h//'
/* Definitions file for GNU Emacs running on Silicon Graphics system 3.6.
   Copyright (C) 1987 Free Software Foundation, Inc.

This file is part of GNU Emacs.

GNU Emacs is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY.  No author or distributor
accepts responsibility to anyone for the consequences of using it
or for whether it serves any particular purpose or works at all,
unless he says so in writing.  Refer to the GNU Emacs General Public
License for full details.

Everyone is granted permission to copy, modify and redistribute
GNU Emacs, but only under the conditions described in the
GNU Emacs General Public License.   A copy of this license is
supposed to have been given to you along with GNU Emacs so you
can know your rights and responsibilities.  It should be in a
file named COPYING.  Among other things, the copyright notice
and this notice must be preserved on all copies.  */

/*
 *	Define symbols to identify the version of Unix this is.
 *	Define all the symbols that apply correctly.
 */

#define USG
#define USG5
#define IRIS

/* SYSTEM_TYPE should indicate the kind of system you are using.
 It sets the Lisp variable system-type.  */

#define SYSTEM_TYPE "silicon-graphics-unix"

/* nomultiplejobs should be defined if your system's shell
 does not have "job control" (the ability to stop a program,
 run some other program, then continue the first one).  */

#define NOMULTIPLEJOBS

/* Default is to set interrupt_input to 0: don't do input buffering within Emacs */

/* #define INTERRUPT_INPUT */

/* Letter to use in finding device name of first pty,
  if system supports pty's.  'a' means it is /dev/ptya0  */

#define FIRST_PTY_LETTER 'a'

/*
 *	Define HAVE_TERMIO if the system provides sysV-style ioctls
 *	for terminal control.
 */

#define HAVE_TERMIO

/*
 *	Define HAVE_TIMEVAL if the system supports the BSD style clock values.
 *	Look in <sys/time.h> for a timeval structure.
 */

#define HAVE_TIMEVAL

/*
 *	Define HAVE_SELECT if the system supports the `select' system call.
 */

#define HAVE_SELECT

/*
 *	Define HAVE_PTYS if the system supports pty devices.
 */

#define HAVE_PTYS

/* Define HAVE_SOCKETS if system supports 4.2-compatible sockets.  */

#define HAVE_SOCKETS

/*
 *	Define NONSYSTEM_DIR_LIBRARY to make Emacs emulate
 *      The 4.2 opendir, etc., library functions.
 */

/* #define NONSYSTEM_DIR_LIBRARY */

/* Define this symbol if your system has the functions bcopy, etc. */

#define BSTRING

/* subprocesses should be defined if you want to
   have code for asynchronous subprocesses
   (as used in M-x compile and M-x shell).
   This is generally OS dependent, and not supported
   under most USG systems. */

#define subprocesses

/* If your system uses COFF (Common Object File Format) then define the
   preprocessor symbol "COFF". */

/* #define COFF */

/* define MAIL_USE_FLOCK if the mailer uses flock
   to interlock access to /usr/spool/mail/$USER.
   The alternative is that a lock file named
   /usr/spool/mail/$USER.lock.  */

/* #define MAIL_USE_FLOCK */

/* Define CLASH_DETECTION if you want lock files to be written
   so that Emacs can tell instantly when you try to modify
   a file that someone else has modified in his Emacs.  */

/* #define CLASH_DETECTION */

/* We use the Berkeley (and usg5.2.2) interface to nlist.  */

#define NLIST_STRUCT

/* The file containing the kernel's symbol table is called /vmunix.  */

#define KERNEL_FILE "/vmunix"

/* The symbol in the kernel where the load average is found
   is named _avenrun.  */

#define LDAV_SYMBOL "_avenrun"

/* Special hacks needed to make Emacs run on this system.  */

/*
 *	Make the sigsetmask function go away.  Don't know what the
 *	ramifications of this are, but doesn't seem possible to
 *	emulate it properly anyway at this point.
 */

#define sigsetmask(mask)	/* Null expansion */
#define sigblock(x) x

/* The IRIS defines SIGIO in signal.h, but doesn't implement it. */
#undef SIGIO

#define LIBS_MACHINE -lbsd -ldbm -lPW
#define C_SWITCH_MACHINE -I/usr/include/bsd

/* setjmp and longjmp can safely replace _setjmp and _longjmp,
   but they will run slower.  */

#define _setjmp setjmp
#define _longjmp longjmp

/* On USG systems the system calls are interruptable by signals
 that the user program has elected to catch.  Thus the system call
 must be retried in these cases.  To handle this without massive
 changes in the source code, we remap the standard system call names
 to names for our own functions in sysdep.c that do the system call
 with retries. */

#define read sys_read
#define open sys_open
#define write sys_write

#define INTERRUPTABLE_OPEN
#define INTERRUPTABLE_IO

/* On USG systems these have different names */

#define index strchr
#define rindex strrchr

/* USG systems tend to put everything declared static
   into the initialized data area, which becomes pure after dumping Emacs.
   Foil this.  Emacs carefully avoids static vars inside functions.  */

/* #define static */

/* Compiler bug bites on many systems when default ADDR_CORRECT is used.  */

#define ADDR_CORRECT(x) (int)((char *)(x) - (char*)0)

/* some errno.h's don't actually allocate the variable itself */

#define NEED_ERRNO
//E*O*F s-iris3-6.h//

echo x - m-iris4d.h
cat > "m-iris4d.h" << '//E*O*F m-iris4d.h//'
/* m- file for Iris-4D machines.  Use with s-iris3-6.h
   Copyright (C) 1987 Free Software Foundation, Inc.

This file is part of GNU Emacs.

GNU Emacs is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY.  No author or distributor
accepts responsibility to anyone for the consequences of using it
or for whether it serves any particular purpose or works at all,
unless he says so in writing.  Refer to the GNU Emacs General Public
License for full details.

Everyone is granted permission to copy, modify and redistribute
GNU Emacs, but only under the conditions described in the
GNU Emacs General Public License.   A copy of this license is
supposed to have been given to you along with GNU Emacs so you
can know your rights and responsibilities.  It should be in a
file named COPYING.  Among other things, the copyright notice
and this notice must be preserved on all copies.  */

/* The following three symbols give information on
 the size of various data types.  */

#define SHORTBITS 16		/* Number of bits in a short */

#define INTBITS 32		/* Number of bits in an int */

#define LONGBITS 32		/* Number of bits in a long */

/* Define BIG_ENDIAN iff lowest-numbered byte in a word
   is the most significant byte.  */

#define BIG_ENDIAN

/* Define NO_ARG_ARRAY if you cannot take the address of the first of a
 * group of arguments and treat it as an array of the arguments.  */

#define NO_ARG_ARRAY

/* Define WORD_MACHINE if addresses and such have
 * to be corrected before they can be used as byte counts.  */

#undef WORD_MACHINE

/* Define how to take a char and sign-extend into an int.
   On machines where char is signed, this is a no-op.  */

#define SIGN_EXTEND_CHAR(c) ((signed char)(c))

/* Now define a symbol for the cpu type, if your compiler
   does not define it automatically:
   Ones defined so far include vax, m68000, ns16000, pyramid,
   orion, tahoe, APOLLO and many others */

#ifndef mips
#define mips
#endif

#ifndef IRIS_4D
#define IRIS_4D
#endif

/* Use type int rather than a union, to represent Lisp_Object */
/* This is desirable for most machines.  */

#define NO_UNION_TYPE

/* Define EXPLICIT_SIGN_EXTEND if XINT must explicitly sign-extend
   the 24-bit bit field into an int.  In other words, if bit fields
   are always unsigned.

   If you use NO_UNION_TYPE, this flag does not matter.  */

#define EXPLICIT_SIGN_EXTEND

/* Data type of load average, as read out of kmem.  */

#define LOAD_AVE_TYPE long	/* This doesn't quite work on the 4D */

/* Convert that into an integer that is 100 for a load average of 1.0  */

#define LOAD_AVE_CVT(x) (int) (((double) (x)) * 100.0 / 256.0)

/* s-iris3-6.h uses /vmunix */

#undef KERNEL_FILE
#define KERNEL_FILE "/unix"

/* Define CANNOT_DUMP on machines where unexec does not work.
   Then the function dump-emacs will not be defined
   and temacs will do (load "loadup") automatically unless told otherwise.  */

#undef CANNOT_DUMP

/* Define VIRT_ADDR_VARIES if the virtual addresses of
   pure and impure space as loaded can vary, and even their
   relative order cannot be relied on.

   Otherwise Emacs assumes that text space precedes data space,
   numerically.  */

/* #define VIRT_ADDR_VARIES */

/* Define C_ALLOCA if this machine does not support a true alloca
   and the one written in C should be used instead.
   Define HAVE_ALLOCA to say that the system provides a properly
   working alloca function and it should be used.
   Define neither one if an assembler-language alloca
   in the file alloca.s should be used.  */

#define C_ALLOCA
/* #define HAVE_ALLOCA */

/* Define NO_REMAP if memory segmentation makes it not work well
   to change the boundary between the text section and data section
   when Emacs is dumped.  If you define this, the preloaded Lisp
   code will not be sharable; but that's better than failing completely.  */

#define NO_REMAP

/* This machine requires completely different unexec code
   which lives in a separate file.  Specify the file name.  */

#define UNEXEC unexmips.o

/*
 * The TEXT_START here is by experiment; the DATA_START is as per the
 * manual (Assembly Language Programmers guide).  These values can be
 * found at run time from &_ftext and &_fdata, though the C file which
 * reads these must be compile with -G 0 (prevent access to those two
 * 'variables' using the $gp register).  However, I am lazy and don't
 * really want to rewrite unexec.c yet again to use this instead of
 * TEXT_START and DATA_START.  The manual indicates that these
 * locations are fixed for ZMAGIC files, so I'll be lazy and do it
 * this way.  It will probably break as of the next release of the
 * IRIS4D, but I've described up above how to find the new values, so
 * I won't feel too guilty.  Note that the value returned through
 * _ftext is the start of text space (in this case it was 0x400140); I
 * presumed that the headers started at 0x400000 and was right.
 *
 * DATA_SEG_BITS forces that bit to be or'd in with any pointers which
 * are trying to access pure strings (as gnu-emacs only allows 24 bits
 * for the value field of a LISP_OBJECT).
 */

#define TEXT_START 0x400000
#define DATA_START 0x10000000
#define DATA_SEG_BITS	0x10000000

#undef LIBS_MACHINE
#define LIBS_MACHINE -lbsd -lPW -lmld
#define LIBS_DEBUG

/* Define this if you have a fairly recent system,
   in which crt1.o and crt1.n should be used.  */
#define HAVE_CRTN

#ifdef HAVE_CRTN
/* Must define START-FILES so that the linker can find /usr/lib/crt0.o.  */
#define START_FILES pre-crt0.o /usr/lib/crt1.o
#define LIB_STANDARD -lc /usr/lib/crtn.o
#else
#define START_FILES pre-crt0.o /usr/lib/crt0.o
/* The entry-point label (start of text segment) is `start', not `__start'.  */
#define DEFAULT_ENTRY_ADDRESS start
#endif

/* Use terminfo instead of termcap.  */

#define TERMINFO

/* Letter to use in finding device name of first pty,
  if system supports pty's.  'a' means it is /dev/ptya0  */

#undef FIRST_PTY_LETTER
#define FIRST_PTY_LETTER 'q'

/* Define STACK_DIRECTION for alloca.c */

#define STACK_DIRECTION -1

/* The standard definitions of these macros would work ok,
   but these are faster because the constants are short.  */

#define XUINT(a) (((unsigned)(a) << INTBITS-VALBITS) >> INTBITS-VALBITS)

#define XSET(var, type, ptr) \
   ((var) = ((int)(type) << VALBITS) + (((unsigned) (ptr) << INTBITS-VALBITS) >> INTBITS-VALBITS))

#define XSETINT(a, b)  XSET(a, XTYPE(a), b)
#define XSETUINT(a, b) XSET(a, XTYPE(a), b)
#define XSETPNTR(a, b) XSET(a, XTYPE(a), b)

#define XMARKBIT(a) ((a) < 0)
#define XSETMARKBIT(a,b) ((a) = ((a) & ~MARKBIT) | ((b) ? MARKBIT : 0))
#define XUNMARK(a) ((a) = (((unsigned)(a) << INTBITS-GCTYPEBITS-VALBITS) >> INTBITS-GCTYPEBITS-VALBITS))
//E*O*F m-iris4d.h//

echo x - unexmips.c
cat > "unexmips.c" << '//E*O*F unexmips.c//'
/* Unexec for MIPS (including IRIS4D).
   Note that the GNU project considers support for MIPS operation
   a peripheral activity which should not be allowed to divert effort
   from development of the GNU system.  Changes in this code will be
   installed when users send them in, but aside from that
   we don't plan to think about it, or about whether other Emacs
   maintenance might break it.

		       NO WARRANTY

  BECAUSE THIS PROGRAM IS LICENSED FREE OF CHARGE, WE PROVIDE ABSOLUTELY
NO WARRANTY, TO THE EXTENT PERMITTED BY APPLICABLE STATE LAW.  EXCEPT
WHEN OTHERWISE STATED IN WRITING, FREE SOFTWARE FOUNDATION, INC,
RICHARD M. STALLMAN AND/OR OTHER PARTIES PROVIDE THIS PROGRAM "AS IS"
WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING,
BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
FITNESS FOR A PARTICULAR PURPOSE.  THE ENTIRE RISK AS TO THE QUALITY
AND PERFORMANCE OF THE PROGRAM IS WITH YOU.  SHOULD THE PROGRAM PROVE
DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING, REPAIR OR
CORRECTION.

 IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW WILL RICHARD M.
STALLMAN, THE FREE SOFTWARE FOUNDATION, INC., AND/OR ANY OTHER PARTY
WHO MAY MODIFY AND REDISTRIBUTE THIS PROGRAM AS PERMITTED BELOW, BE
LIABLE TO YOU FOR DAMAGES, INCLUDING ANY LOST PROFITS, LOST MONIES, OR
OTHER SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
USE OR INABILITY TO USE (INCLUDING BUT NOT LIMITED TO LOSS OF DATA OR
DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY THIRD PARTIES OR
A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS) THIS
PROGRAM, EVEN IF YOU HAVE BEEN ADVISED OF THE POSSIBILITY OF SUCH
DAMAGES, OR FOR ANY CLAIM BY ANY OTHER PARTY.

		GENERAL PUBLIC LICENSE TO COPY

  1. You may copy and distribute verbatim copies of this source file
as you receive it, in any medium, provided that you conspicuously and
appropriately publish on each copy a valid copyright notice "Copyright
(C) 1987 Free Software Foundation, Inc."; and include following the
copyright notice a verbatim copy of the above disclaimer of warranty
and of this License.  You may charge a distribution fee for the
physical act of transferring a copy.

  2. You may modify your copy or copies of this source file or
any portion of it, and copy and distribute such modifications under
the terms of Paragraph 1 above, provided that you also do the following:

    a) cause the modified files to carry prominent notices stating
    that you changed the files and the date of any change; and

    b) cause the whole of any work that you distribute or publish,
    that in whole or in part contains or is a derivative of this
    program or any part thereof, to be licensed at no charge to all
    third parties on terms identical to those contained in this
    License Agreement (except that you may choose to grant more extensive
    warranty protection to some or all third parties, at your option).

    c) You may charge a distribution fee for the physical act of
    transferring a copy, and you may at your option offer warranty
    protection in exchange for a fee.

Mere aggregation of another unrelated program with this program (or its
derivative) on a volume of a storage or distribution medium does not bring
the other program under the scope of these terms.

  3. You may copy and distribute this program (or a portion or derivative
of it, under Paragraph 2) in object code or executable form under the terms
of Paragraphs 1 and 2 above provided that you also do one of the following:

    a) accompany it with the complete corresponding machine-readable
    source code, which must be distributed under the terms of
    Paragraphs 1 and 2 above; or,

    b) accompany it with a written offer, valid for at least three
    years, to give any third party free (except for a nominal
    shipping charge) a complete machine-readable copy of the
    corresponding source code, to be distributed under the terms of
    Paragraphs 1 and 2 above; or,

    c) accompany it with the information you received as to where the
    corresponding source code may be obtained.  (This alternative is
    allowed only for noncommercial distribution and only if you
    received the program in object code or executable form alone.)

For an executable file, complete source code means all the source code for
all modules it contains; but, as a special exception, it need not include
source code for modules which are standard libraries that accompany the
operating system on which the executable file runs.

  4. You may not copy, sublicense, distribute or transfer this program
except as expressly provided under this License Agreement.  Any attempt
otherwise to copy, sublicense, distribute or transfer this program is void and
your rights to use the program under this License agreement shall be
automatically terminated.  However, parties who have received computer
software programs from you with this License Agreement will not have
their licenses terminated so long as such parties remain in full compliance.

  5. If you wish to incorporate parts of this program into other free
programs whose distribution conditions are different, write to the Free
Software Foundation at 675 Mass Ave, Cambridge, MA 02139.  We have not yet
worked out a simple rule that can be stated here, but we will often permit
this.  We will be guided by the two goals of preserving the free status of
all derivatives of our free software and of promoting the sharing and reuse of
software.

In other words, you are welcome to use, share and improve this program.
You are forbidden to forbid anyone else to use, share and improve
what you give them.   Help stamp out software-hoarding!  */

#include "config.h"
#include <sys/types.h>
#include <sys/file.h>
#include <sys/stat.h>
#include <stdio.h>
#include <varargs.h>
#include <filehdr.h>
#include <aouthdr.h>
#include <scnhdr.h>
#include <sym.h>

#ifdef IRIS_4D
#include "getpagesize.h"
#endif

static void fatal_unexec ();

#define READ(_fd, _buffer, _size, _error_message, _error_arg) \
	errno = EEOF; \
	if (read (_fd, _buffer, _size) != _size) \
	  fatal_unexec (_error_message, _error_arg);

#define WRITE(_fd, _buffer, _size, _error_message, _error_arg) \
	if (write (_fd, _buffer, _size) != _size) \
	  fatal_unexec (_error_message, _error_arg);

#define SEEK(_fd, _position, _error_message, _error_arg) \
	errno = EEOF; \
	if (lseek (_fd, _position, L_SET) != _position) \
	  fatal_unexec (_error_message, _error_arg);

extern int errno;
extern int sys_nerr;
extern char *sys_errlist[];
#define EEOF -1

static struct scnhdr *text_section;
static struct scnhdr *init_section;
static struct scnhdr *finit_section;
static struct scnhdr *rdata_section;
static struct scnhdr *data_section;
static struct scnhdr *lit8_section;
static struct scnhdr *lit4_section;
static struct scnhdr *sdata_section;
static struct scnhdr *sbss_section;
static struct scnhdr *bss_section;

struct headers {
    struct filehdr fhdr;
    struct aouthdr aout;
    struct scnhdr section[10];
};

/* Define name of label for entry point for the dumped executable.  */

#ifndef DEFAULT_ENTRY_ADDRESS
#define DEFAULT_ENTRY_ADDRESS __start
#endif

unexec (new_name, a_name, data_start, bss_start, entry_address)
     char *new_name, *a_name;
     unsigned data_start, bss_start, entry_address;
{
  int new, old;
  int pagesize, brk;
  int newsyms, symrel;
  int nread;
  struct headers hdr;
  int i;
  int vaddr, scnptr;
#define BUFSIZE 8192
  char buffer[BUFSIZE];

  old = open (a_name, O_RDONLY, 0);
  if (old < 0) fatal_unexec ("opening %s", a_name);

  new = creat (new_name, 0666);
  if (new < 0) fatal_unexec ("creating %s", new_name);

  hdr = *((struct headers *)TEXT_START);
  if (hdr.fhdr.f_magic != MIPSELMAGIC
      && hdr.fhdr.f_magic != MIPSEBMAGIC)
    {
      fprintf (stderr, "unexec: input file magic number is %x, not %x or %x.\n",
	      hdr.fhdr.f_magic, MIPSELMAGIC, MIPSEBMAGIC);
      exit (1);
    }
  if (hdr.fhdr.f_opthdr != sizeof (hdr.aout))
    {
      fprintf (stderr, "unexec: input a.out header is %d bytes, not %d.\n",
	      hdr.fhdr.f_opthdr, sizeof (hdr.aout));
      exit (1);
    }
  if (hdr.aout.magic != ZMAGIC)
    {
      fprintf (stderr, "unexec: input file a.out magic number is %o, not %o.\n",
	      hdr.aout.magic, ZMAGIC);
      exit (1);
    }

#define CHECK_SCNHDR(ptr, name, flags)					\
  if (strcmp (hdr.section[i].s_name, name) == 0)			\
    {									\
      if (hdr.section[i].s_flags != flags)				\
	fprintf (stderr, "unexec: %x flags (%x expected) in %s section.\n", \
		 hdr.section[i].s_flags, flags, name);			\
      ptr = hdr.section + i;						\
      i += 1;								\
    }									\
  else									\
    ptr = NULL;

  i = 0;
  CHECK_SCNHDR (text_section,  _TEXT,  STYP_TEXT);
  CHECK_SCNHDR (init_section,  _INIT,  STYP_INIT);
  CHECK_SCNHDR (rdata_section, _RDATA, STYP_RDATA);
  CHECK_SCNHDR (data_section,  _DATA,  STYP_DATA);
#ifdef _LIT8
  CHECK_SCNHDR (lit8_section,  _LIT8,  STYP_LIT8);
  CHECK_SCNHDR (lit4_section,  _LIT4,  STYP_LIT4);
#endif /* _LIT8 */
  CHECK_SCNHDR (sdata_section, _SDATA, STYP_SDATA);
  CHECK_SCNHDR (sbss_section,  _SBSS,  STYP_SBSS);
  CHECK_SCNHDR (bss_section,   _BSS,   STYP_BSS);
  if (i != hdr.fhdr.f_nscns)
    fprintf (stderr, "unexec: %d sections found instead of %d.\n",
	    i, hdr.fhdr.f_nscns);

  pagesize = getpagesize ();
  brk = (sbrk (0) + pagesize - 1) & (-pagesize);
  hdr.aout.dsize = brk - DATA_START;
  hdr.aout.bsize = 0;
  if (entry_address == 0)
    {
      extern DEFAULT_ENTRY_ADDRESS ();
      hdr.aout.entry = (unsigned)DEFAULT_ENTRY_ADDRESS;
    }
  else
    hdr.aout.entry = entry_address;

  hdr.aout.bss_start = hdr.aout.data_start + hdr.aout.dsize;
  rdata_section->s_size = data_start - DATA_START;
  data_section->s_vaddr = data_start;
  data_section->s_paddr = data_start;
  data_section->s_size = brk - DATA_START;
  data_section->s_scnptr = rdata_section->s_scnptr + rdata_section->s_size;
  vaddr = data_section->s_vaddr + data_section->s_size;
  scnptr = data_section->s_scnptr + data_section->s_size;
  if (lit8_section != NULL)
    {
      lit8_section->s_vaddr = vaddr;
      lit8_section->s_paddr = vaddr;
      lit8_section->s_size = 0;
      lit8_section->s_scnptr = scnptr;
    }
  if (lit4_section != NULL)
    {
      lit4_section->s_vaddr = vaddr;
      lit4_section->s_paddr = vaddr;
      lit4_section->s_size = 0;
      lit4_section->s_scnptr = scnptr;
    }
  if (sdata_section != NULL)
    {
      sdata_section->s_vaddr = vaddr;
      sdata_section->s_paddr = vaddr;
      sdata_section->s_size = 0;
      sdata_section->s_scnptr = scnptr;
    }
  if (sbss_section != NULL)
    {
      sbss_section->s_vaddr = vaddr;
      sbss_section->s_paddr = vaddr;
      sbss_section->s_size = 0;
      sbss_section->s_scnptr = scnptr;
    }
  if (bss_section != NULL)
    {
      bss_section->s_vaddr = vaddr;
      bss_section->s_paddr = vaddr;
      bss_section->s_size = 0;
      bss_section->s_scnptr = scnptr;
    }

  WRITE (new, TEXT_START, hdr.aout.tsize,
	"writing text section to %s", new_name);
  WRITE (new, DATA_START, hdr.aout.dsize,
	"writing text section to %s", new_name);

  SEEK (old, hdr.fhdr.f_symptr, "seeking to start of symbols in %s", a_name);
  errno = EEOF;
  nread = read (old, buffer, BUFSIZE);
  if (nread < sizeof (HDRR)) fatal_unexec ("reading symbols from %s", a_name);
#define symhdr ((pHDRR)buffer)
  newsyms = hdr.aout.tsize + hdr.aout.dsize;
  symrel = newsyms - hdr.fhdr.f_symptr;
  hdr.fhdr.f_symptr = newsyms;
  symhdr->cbLineOffset += symrel;
  symhdr->cbDnOffset += symrel;
  symhdr->cbPdOffset += symrel;
  symhdr->cbSymOffset += symrel;
  symhdr->cbOptOffset += symrel;
  symhdr->cbAuxOffset += symrel;
  symhdr->cbSsOffset += symrel;
  symhdr->cbSsExtOffset += symrel;
  symhdr->cbFdOffset += symrel;
  symhdr->cbRfdOffset += symrel;
  symhdr->cbExtOffset += symrel;
#undef symhdr
  do
    {
      if (write (new, buffer, nread) != nread)
	fatal_unexec ("writing symbols to %s", new_name);
      nread = read (old, buffer, BUFSIZE);
      if (nread < 0) fatal_unexec ("reading symbols from %s", a_name);
#undef BUFSIZE
    } while (nread != 0);

  SEEK (new, 0, "seeking to start of header in %s", new_name);
  WRITE (new, &hdr, sizeof (hdr),
	"writing header of %s", new_name);

  close (old);
  close (new);
  mark_x (new_name);
}

/*
 * mark_x
 *
 * After succesfully building the new a.out, mark it executable
 */

static
mark_x (name)
     char *name;
{
  struct stat sbuf;
  int um = umask (777);
  umask (um);
  if (stat (name, &sbuf) < 0)
    fatal_unexec ("getting protection on %s", name);
  sbuf.st_mode |= 0111 & ~um;
  if (chmod (name, sbuf.st_mode) < 0)
    fatal_unexec ("setting protection on %s", name);
}

static void
fatal_unexec (s, va_alist)
     va_dcl
{
  va_list ap;
  if (errno == EEOF)
    fputs ("unexec: unexpected end of file, ", stderr);
  else if (errno < sys_nerr)
    fprintf (stderr, "unexec: %s, ", sys_errlist[errno]);
  else
    fprintf (stderr, "unexec: error code %d, ", errno);
  va_start (ap);
  _doprnt (s, ap, stderr);
  fputs (".\n", stderr);
  exit (1);
}

//E*O*F unexmips.c//

exit 0

+----------------------------------------------------------------------+
|Thomas Russo		       |  russo at chaos.utexas.edu	       |
|Center for Nonlinear Dynamics, University of Texas at Austin          |
+----------------------------------------------------------------------+