Rename src/unexec.c => src/unexcoff.c.

 src/unexcoff.c: Renamed from unexec.c.
 src/deps.mk (unexcoff.o): Rename unexec.[co] => unexcoff.[co].
 configure.in (UNEXEC_OBJ): Rename unexec.o => unexcoff.o.
 admin/MAINTAINERS: Rename src/unexec.c => src/unexcoff.c.
 etc/AUTHORS: Rename unexec.o => unexcoff.o.
 etc/PROBLEMS: Rename unexec.o => unex*.o.
 lisp/emacs-lisp/find-gc.el (find-gc-source-files): Rename
 unexec.c => unexcoff.c.
 lisp/emacs-lisp/authors.el (authors-fixed-entries): Rename
 unexec.c => unexcoff.c.
 msdos/sed1v2.inp (UNEXEC_OBJ): Edit to unexcoff.o, due to renaming of
 unexec.c => unexcoff.c.

1 files changed, 0 insertions, 658 deletions

diff --git a/src/unexec.c b/src/unexec.c
deleted file mode 100644
index f7f93b066de..00000000000
--- a/src/unexec.c
+++ /dev/null
@@ -1,658 +0,0 @@
-/* Copyright (C) 1985, 1986, 1987, 1988, 1992, 1993, 1994, 2001, 2002, 2003,
-                 2004, 2005, 2006, 2007, 2008, 2009, 2010  Free Software Foundation, Inc.
-
-This file is part of GNU Emacs.
-
-GNU Emacs 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 3 of the License, or
-(at your option) any later version.
-
-GNU Emacs 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 GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.  */
-
-
-/*
- * unexec.c - Convert a running program into an a.out file.
- *
- * Author:      Spencer W. Thomas
- *              Computer Science Dept.
- *              University of Utah
- * Date:        Tue Mar  2 1982
- * Modified heavily since then.
- *
- * Synopsis:
- *      unexec (new_name, a_name, data_start, bss_start, entry_address)
- *      char *new_name, *a_name;
- *      unsigned data_start, bss_start, entry_address;
- *
- * Takes a snapshot of the program and makes an a.out format file in the
- * file named by the string argument new_name.
- * If a_name is non-NULL, the symbol table will be taken from the given file.
- * On some machines, an existing a_name file is required.
- *
- * The boundaries within the a.out file may be adjusted with the data_start
- * and bss_start arguments.  Either or both may be given as 0 for defaults.
- *
- * Data_start gives the boundary between the text segment and the data
- * segment of the program.  The text segment can contain shared, read-only
- * program code and literal data, while the data segment is always unshared
- * and unprotected.  Data_start gives the lowest unprotected address.
- * The value you specify may be rounded down to a suitable boundary
- * as required by the machine you are using.
- *
- * Specifying zero for data_start means the boundary between text and data
- * should not be the same as when the program was loaded.
- *
- * Bss_start indicates how much of the data segment is to be saved in the
- * a.out file and restored when the program is executed.  It gives the lowest
- * unsaved address, and is rounded up to a page boundary.  The default when 0
- * is given assumes that the entire data segment is to be stored, including
- * the previous data and bss as well as any additional storage allocated with
- * break (2).
- *
- * The new file is set up to start at entry_address.
- *
- * If you make improvements I'd like to get them too.
- * harpo!utah-cs!thomas, thomas@Utah-20
- *
- */
-
-/* Modified to support SysVr3 shared libraries by James Van Artsdalen
- * of Dell Computer Corporation.  james@bigtex.cactus.org.
- */
-
-#ifndef emacs
-#define PERROR(arg) perror (arg); return -1
-#else
-#include <config.h>
-#define PERROR(file) report_error (file, new)
-#endif
-
-#ifndef CANNOT_DUMP  /* all rest of file!  */
-
-#ifdef HAVE_COFF_H
-#include <coff.h>
-#ifdef MSDOS
-#include <fcntl.h>  /* for O_RDONLY, O_RDWR */
-#include <crt0.h>   /* for _crt0_startup_flags and its bits */
-static int save_djgpp_startup_flags;
-#define filehdr external_filehdr
-#define scnhdr external_scnhdr
-#define syment external_syment
-#define auxent external_auxent
-#define n_numaux e_numaux
-#define n_type e_type
-struct aouthdr
-{
-  unsigned short        magic;  /* type of file                         */
-  unsigned short        vstamp; /* version stamp                        */
-  unsigned long         tsize;  /* text size in bytes, padded to FW bdry*/
-  unsigned long         dsize;  /* initialized data "  "                */
-  unsigned long         bsize;  /* uninitialized data "   "             */
-  unsigned long         entry;  /* entry pt.                            */
-  unsigned long         text_start;/* base of text used for this file */
-  unsigned long         data_start;/* base of data used for this file */
-};
-#endif /* not MSDOS */
-#else  /* not HAVE_COFF_H */
-#include <a.out.h>
-#endif /* not HAVE_COFF_H */
-
-/* Define getpagesize if the system does not.
-   Note that this may depend on symbols defined in a.out.h.  */
-#include "getpagesize.h"
-
-#ifndef makedev                 /* Try to detect types.h already loaded */
-#include <sys/types.h>
-#endif /* makedev */
-#include <stdio.h>
-#include <sys/stat.h>
-#include <errno.h>
-
-#include <sys/file.h>
-
-#ifndef O_RDONLY
-#define O_RDONLY 0
-#endif
-#ifndef O_RDWR
-#define O_RDWR 2
-#endif
-
-
-extern char *start_of_text ();          /* Start of text */
-extern char *start_of_data ();          /* Start of initialized data */
-
-static long block_copy_start;           /* Old executable start point */
-static struct filehdr f_hdr;            /* File header */
-static struct aouthdr f_ohdr;           /* Optional file header (a.out) */
-long bias;                      /* Bias to add for growth */
-long lnnoptr;                   /* Pointer to line-number info within file */
-#define SYMS_START block_copy_start
-
-static long text_scnptr;
-static long data_scnptr;
-
-static long coff_offset;
-
-static int pagemask;
-
-/* Correct an int which is the bit pattern of a pointer to a byte
-   into an int which is the number of a byte.
-   This is a no-op on ordinary machines, but not on all.  */
-
-#define ADDR_CORRECT(x) ((char *)(x) - (char*)0)
-
-#ifdef emacs
-
-#include <setjmp.h>
-#include "lisp.h"
-
-static
-report_error (file, fd)
-     char *file;
-     int fd;
-{
-  if (fd)
-    close (fd);
-  report_file_error ("Cannot unexec", Fcons (build_string (file), Qnil));
-}
-#endif /* emacs */
-
-#define ERROR0(msg) report_error_1 (new, msg, 0, 0); return -1
-#define ERROR1(msg,x) report_error_1 (new, msg, x, 0); return -1
-#define ERROR2(msg,x,y) report_error_1 (new, msg, x, y); return -1
-
-static
-report_error_1 (fd, msg, a1, a2)
-     int fd;
-     char *msg;
-     int a1, a2;
-{
-  close (fd);
-#ifdef emacs
-  error (msg, a1, a2);
-#else
-  fprintf (stderr, msg, a1, a2);
-  fprintf (stderr, "\n");
-#endif
-}
-
-static int make_hdr ();
-static int copy_text_and_data ();
-static int copy_sym ();
-static void mark_x ();
-
-/* ****************************************************************
- * make_hdr
- *
- * Make the header in the new a.out from the header in core.
- * Modify the text and data sizes.
- */
-static int
-make_hdr (new, a_out, data_start, bss_start, entry_address, a_name, new_name)
-     int new, a_out;
-     unsigned data_start, bss_start, entry_address;
-     char *a_name;
-     char *new_name;
-{
-  int tem;
-  auto struct scnhdr f_thdr;            /* Text section header */
-  auto struct scnhdr f_dhdr;            /* Data section header */
-  auto struct scnhdr f_bhdr;            /* Bss section header */
-  auto struct scnhdr scntemp;           /* Temporary section header */
-  register int scns;
-  unsigned int bss_end;
-
-  pagemask = getpagesize () - 1;
-
-  /* Adjust text/data boundary. */
-  data_start = (int) start_of_data ();
-  data_start = ADDR_CORRECT (data_start);
-  data_start = data_start & ~pagemask; /* (Down) to page boundary. */
-
-  bss_end = ADDR_CORRECT (sbrk (0)) + pagemask;
-  bss_end &= ~ pagemask;
-
-  /* Adjust data/bss boundary. */
-  if (bss_start != 0)
-    {
-      bss_start = (ADDR_CORRECT (bss_start) + pagemask);
-      /* (Up) to page bdry. */
-      bss_start &= ~ pagemask;
-      if (bss_start > bss_end)
-        {
-          ERROR1 ("unexec: Specified bss_start (%u) is past end of program",
-                  bss_start);
-        }
-    }
-  else
-    bss_start = bss_end;
-
-  if (data_start > bss_start)   /* Can't have negative data size. */
-    {
-      ERROR2 ("unexec: data_start (%u) can't be greater than bss_start (%u)",
-              data_start, bss_start);
-    }
-
-  coff_offset = 0L;             /* stays zero, except in DJGPP */
-
-  /* Salvage as much info from the existing file as possible */
-  if (a_out >= 0)
-    {
-#ifdef MSDOS
-      /* Support the coff-go32-exe format with a prepended stub, since
-         this is what GCC 2.8.0 and later generates by default in DJGPP.  */
-      unsigned short mz_header[3];
-
-      if (read (a_out, &mz_header, sizeof (mz_header)) != sizeof (mz_header))
-        {
-          PERROR (a_name);
-        }
-      if (mz_header[0] == 0x5a4d || mz_header[0] == 0x4d5a) /* "MZ" or "ZM" */
-        {
-          coff_offset = (long)mz_header[2] * 512L;
-          if (mz_header[1])
-            coff_offset += (long)mz_header[1] - 512L;
-          lseek (a_out, coff_offset, 0);
-        }
-      else
-        lseek (a_out, 0L, 0);
-#endif /* MSDOS */
-      if (read (a_out, &f_hdr, sizeof (f_hdr)) != sizeof (f_hdr))
-        {
-          PERROR (a_name);
-        }
-      block_copy_start += sizeof (f_hdr);
-      if (f_hdr.f_opthdr > 0)
-        {
-          if (read (a_out, &f_ohdr, sizeof (f_ohdr)) != sizeof (f_ohdr))
-            {
-              PERROR (a_name);
-            }
-          block_copy_start += sizeof (f_ohdr);
-        }
-      /* Loop through section headers, copying them in */
-      lseek (a_out, coff_offset + sizeof (f_hdr) + f_hdr.f_opthdr, 0);
-      for (scns = f_hdr.f_nscns; scns > 0; scns--) {
-        if (read (a_out, &scntemp, sizeof (scntemp)) != sizeof (scntemp))
-          {
-            PERROR (a_name);
-          }
-        if (scntemp.s_scnptr > 0L)
-          {
-            if (block_copy_start < scntemp.s_scnptr + scntemp.s_size)
-              block_copy_start = scntemp.s_scnptr + scntemp.s_size;
-          }
-        if (strcmp (scntemp.s_name, ".text") == 0)
-          {
-            f_thdr = scntemp;
-          }
-        else if (strcmp (scntemp.s_name, ".data") == 0)
-          {
-            f_dhdr = scntemp;
-          }
-        else if (strcmp (scntemp.s_name, ".bss") == 0)
-          {
-            f_bhdr = scntemp;
-          }
-      }
-    }
-  else
-    {
-      ERROR0 ("can't build a COFF file from scratch yet");
-    }
-
-  /* Now we alter the contents of all the f_*hdr variables
-     to correspond to what we want to dump.  */
-
-  f_hdr.f_flags |= (F_RELFLG | F_EXEC);
-  f_ohdr.text_start = (long) start_of_text ();
-  f_ohdr.tsize = data_start - f_ohdr.text_start;
-  f_ohdr.data_start = data_start;
-  f_ohdr.dsize = bss_start - f_ohdr.data_start;
-  f_ohdr.bsize = bss_end - bss_start;
-  f_thdr.s_size = f_ohdr.tsize;
-  f_thdr.s_scnptr = sizeof (f_hdr) + sizeof (f_ohdr);
-  f_thdr.s_scnptr += (f_hdr.f_nscns) * (sizeof (f_thdr));
-  lnnoptr = f_thdr.s_lnnoptr;
-  text_scnptr = f_thdr.s_scnptr;
-  f_dhdr.s_paddr = f_ohdr.data_start;
-  f_dhdr.s_vaddr = f_ohdr.data_start;
-  f_dhdr.s_size = f_ohdr.dsize;
-  f_dhdr.s_scnptr = f_thdr.s_scnptr + f_thdr.s_size;
-  data_scnptr = f_dhdr.s_scnptr;
-  f_bhdr.s_paddr = f_ohdr.data_start + f_ohdr.dsize;
-  f_bhdr.s_vaddr = f_ohdr.data_start + f_ohdr.dsize;
-  f_bhdr.s_size = f_ohdr.bsize;
-  f_bhdr.s_scnptr = 0L;
-  bias = f_dhdr.s_scnptr + f_dhdr.s_size - block_copy_start;
-
-  if (f_hdr.f_symptr > 0L)
-    {
-      f_hdr.f_symptr += bias;
-    }
-
-  if (f_thdr.s_lnnoptr > 0L)
-    {
-      f_thdr.s_lnnoptr += bias;
-    }
-
-  if (write (new, &f_hdr, sizeof (f_hdr)) != sizeof (f_hdr))
-    {
-      PERROR (new_name);
-    }
-
-  if (write (new, &f_ohdr, sizeof (f_ohdr)) != sizeof (f_ohdr))
-    {
-      PERROR (new_name);
-    }
-
-  if (write (new, &f_thdr, sizeof (f_thdr)) != sizeof (f_thdr))
-    {
-      PERROR (new_name);
-    }
-
-  if (write (new, &f_dhdr, sizeof (f_dhdr)) != sizeof (f_dhdr))
-    {
-      PERROR (new_name);
-    }
-
-  if (write (new, &f_bhdr, sizeof (f_bhdr)) != sizeof (f_bhdr))
-    {
-      PERROR (new_name);
-    }
-
-  return (0);
-
-}
-
-write_segment (new, ptr, end)
-     int new;
-     register char *ptr, *end;
-{
-  register int i, nwrite, ret;
-  char buf[80];
-  /* This is the normal amount to write at once.
-     It is the size of block that NFS uses.  */
-  int writesize = 1 << 13;
-  int pagesize = getpagesize ();
-  char zeros[1 << 13];
-
-  memset (zeros, 0, sizeof (zeros));
-
-  for (i = 0; ptr < end;)
-    {
-      /* Distance to next multiple of writesize.  */
-      nwrite = (((int) ptr + writesize) & -writesize) - (int) ptr;
-      /* But not beyond specified end.  */
-      if (nwrite > end - ptr) nwrite = end - ptr;
-      ret = write (new, ptr, nwrite);
-      /* If write gets a page fault, it means we reached
-         a gap between the old text segment and the old data segment.
-         This gap has probably been remapped into part of the text segment.
-         So write zeros for it.  */
-      if (ret == -1
-#ifdef EFAULT
-          && errno == EFAULT
-#endif
-          )
-        {
-          /* Write only a page of zeros at once,
-             so that we don't overshoot the start
-             of the valid memory in the old data segment.  */
-          if (nwrite > pagesize)
-            nwrite = pagesize;
-          write (new, zeros, nwrite);
-        }
-#if 0 /* Now that we have can ask `write' to write more than a page,
-         it is legit for write do less than the whole amount specified.  */
-      else if (nwrite != ret)
-        {
-          sprintf (buf,
-                   "unexec write failure: addr 0x%x, fileno %d, size 0x%x, wrote 0x%x, errno %d",
-                   ptr, new, nwrite, ret, errno);
-          PERROR (buf);
-        }
-#endif
-      i += nwrite;
-      ptr += nwrite;
-    }
-}
-/* ****************************************************************
- * copy_text_and_data
- *
- * Copy the text and data segments from memory to the new a.out
- */
-static int
-copy_text_and_data (new, a_out)
-     int new, a_out;
-{
-  register char *end;
-  register char *ptr;
-
-#ifdef MSDOS
-  /* Dump the original table of exception handlers, not the one
-     where our exception hooks are registered.  */
-  __djgpp_exception_toggle ();
-
-  /* Switch off startup flags that might have been set at runtime
-     and which might change the way that dumped Emacs works.  */
-  save_djgpp_startup_flags = _crt0_startup_flags;
-  _crt0_startup_flags &= ~(_CRT0_FLAG_NO_LFN | _CRT0_FLAG_NEARPTR);
-#endif
-
-  lseek (new, (long) text_scnptr, 0);
-  ptr = (char *) f_ohdr.text_start;
-  end = ptr + f_ohdr.tsize;
-  write_segment (new, ptr, end);
-
-  lseek (new, (long) data_scnptr, 0);
-  ptr = (char *) f_ohdr.data_start;
-  end = ptr + f_ohdr.dsize;
-  write_segment (new, ptr, end);
-
-#ifdef MSDOS
-  /* Restore our exception hooks.  */
-  __djgpp_exception_toggle ();
-
-  /* Restore the startup flags.  */
-  _crt0_startup_flags = save_djgpp_startup_flags;
-#endif
-
-
-  return 0;
-}
-
-/* ****************************************************************
- * copy_sym
- *
- * Copy the relocation information and symbol table from the a.out to the new
- */
-static int
-copy_sym (new, a_out, a_name, new_name)
-     int new, a_out;
-     char *a_name, *new_name;
-{
-  char page[1024];
-  int n;
-
-  if (a_out < 0)
-    return 0;
-
-  if (SYMS_START == 0L)
-    return 0;
-
-  if (lnnoptr)                  /* if there is line number info */
-    lseek (a_out, coff_offset + lnnoptr, 0);    /* start copying from there */
-  else
-    lseek (a_out, coff_offset + SYMS_START, 0); /* Position a.out to symtab. */
-
-  while ((n = read (a_out, page, sizeof page)) > 0)
-    {
-      if (write (new, page, n) != n)
-        {
-          PERROR (new_name);
-        }
-    }
-  if (n < 0)
-    {
-      PERROR (a_name);
-    }
-  return 0;
-}
-
-/* ****************************************************************
- * mark_x
- *
- * After successfully building the new a.out, mark it executable
- */
-static void
-mark_x (name)
-     char *name;
-{
-  struct stat sbuf;
-  int um;
-  int new = 0;  /* for PERROR */
-
-  um = umask (777);
-  umask (um);
-  if (stat (name, &sbuf) == -1)
-    {
-      PERROR (name);
-    }
-  sbuf.st_mode |= 0111 & ~um;
-  if (chmod (name, sbuf.st_mode) == -1)
-    PERROR (name);
-}
-
-
-/*
- *      If the COFF file contains a symbol table and a line number section,
- *      then any auxiliary entries that have values for x_lnnoptr must
- *      be adjusted by the amount that the line number section has moved
- *      in the file (bias computed in make_hdr).  The #@$%&* designers of
- *      the auxiliary entry structures used the absolute file offsets for
- *      the line number entry rather than an offset from the start of the
- *      line number section!
- *
- *      When I figure out how to scan through the symbol table and pick out
- *      the auxiliary entries that need adjustment, this routine will
- *      be fixed.  As it is now, all such entries are wrong and sdb
- *      will complain.   Fred Fish, UniSoft Systems Inc.
- */
-
-/* This function is probably very slow.  Instead of reopening the new
-   file for input and output it should copy from the old to the new
-   using the two descriptors already open (WRITEDESC and READDESC).
-   Instead of reading one small structure at a time it should use
-   a reasonable size buffer.  But I don't have time to work on such
-   things, so I am installing it as submitted to me.  -- RMS.  */
-
-adjust_lnnoptrs (writedesc, readdesc, new_name)
-     int writedesc;
-     int readdesc;
-     char *new_name;
-{
-  register int nsyms;
-  register int new;
-  struct syment symentry;
-  union auxent auxentry;
-
-  if (!lnnoptr || !f_hdr.f_symptr)
-    return 0;
-
-#ifdef MSDOS
-  if ((new = writedesc) < 0)
-#else
-  if ((new = open (new_name, O_RDWR)) < 0)
-#endif
-    {
-      PERROR (new_name);
-      return -1;
-    }
-
-  lseek (new, f_hdr.f_symptr, 0);
-  for (nsyms = 0; nsyms < f_hdr.f_nsyms; nsyms++)
-    {
-      read (new, &symentry, SYMESZ);
-      if (symentry.n_numaux)
-        {
-          read (new, &auxentry, AUXESZ);
-          nsyms++;
-          if (ISFCN (symentry.n_type) || symentry.n_type == 0x2400)
-            {
-              auxentry.x_sym.x_fcnary.x_fcn.x_lnnoptr += bias;
-              lseek (new, -AUXESZ, 1);
-              write (new, &auxentry, AUXESZ);
-            }
-        }
-    }
-#ifndef MSDOS
-  close (new);
-#endif
-  return 0;
-}
-
-extern unsigned start __asm__ ("start");
-
-/*
- *      Return the address of the start of the text segment prior to
- *      doing an unexec.  After unexec the return value is undefined.
- *      See crt0.c for further explanation and _start.
- *
- */
-
-char *
-start_of_text (void)
-{
-  return ((char *) &start);
-}
-
-/* ****************************************************************
- * unexec
- *
- * driving logic.
- */
-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, a_out = -1;
-
-  if (a_name && (a_out = open (a_name, O_RDONLY)) < 0)
-    {
-      PERROR (a_name);
-    }
-  if ((new = creat (new_name, 0666)) < 0)
-    {
-      PERROR (new_name);
-    }
-
-  if (make_hdr (new, a_out, data_start, bss_start, entry_address, a_name, new_name) < 0
-      || copy_text_and_data (new, a_out) < 0
-      || copy_sym (new, a_out, a_name, new_name) < 0
-      || adjust_lnnoptrs (new, a_out, new_name) < 0
-      )
-    {
-      close (new);
-      /* unlink (new_name);             /* Failed, unlink new a.out */
-      return -1;
-    }
-
-  close (new);
-  if (a_out >= 0)
-    close (a_out);
-  mark_x (new_name);
-  return 0;
-}
-
-#endif /* not CANNOT_DUMP */
-
-/* arch-tag: 62409b69-e27a-4a7c-9413-0210d6b54e7f
-   (do not change this comment) */