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.
+2010-08-05 Eli Zaretskii <eliz@gnu.org>
+
+ * configure.in (UNEXEC_OBJ): Rename unexec.o => unexcoff.o.
+
2010-08-04 Andreas Schwab <schwab@linux-m68k.org>
* configure.in: Restore accidentally removed use of
+2010-08-05 Eli Zaretskii <eliz@gnu.org>
+
+ * MAINTAINERS: Rename src/unexec.c => src/unexcoff.c.
+
2010-07-24 Christoph Scholtes <cschol2112@gmail.com>
* admin.el: Write version number to nt/makefile.w32-in.
UNEXEC_OBJ=unexelf.o
case "$opsys" in
- # MSDOS uses unexec.o
+ # MSDOS uses unexcoff.o
# MSWindows uses unexw32.o
aix4-2)
UNEXEC_OBJ=unexaix.o
François-David Collin: changed message.el mm-decode.el
-Fred Fish: changed linux.h unexec.c
+Fred Fish: changed linux.h unexcoff.c
Fred Oberhauser: changed nnmail.el
Inoue Seiichiro: changed xterm.c xfns.c xterm.h
International Business Machines: changed emacs.c fileio.c process.c
- sysdep.c unexec.c
+ sysdep.c unexcoff.c
Irie Tetsuya: changed gnus.texi message.texi
James Troup: changed gnus-sum.el
-James Van Artsdalen: changed unexec.c usg5-4.h
+James Van Artsdalen: changed unexcoff.c usg5-4.h
James Wright: changed em-unix.el
simple.el vc.el configure.in dired.el and 50 other files
Michael Ben-Gershon: changed acorn.h configure.in riscix1-1.h riscix1-2.h
- unexec.c
+ unexcoff.c
Michael D. Ernst: wrote reposition.el
and changed dired-x.el uniquify.el ispell.el bibtex.el rmail.el dired.el
Michael K. Johnson: changed configure.in emacs.c intel386.h linux.h
mem-limits.h process.c sysdep.c syssignal.h systty.h template.h
- unexec.c
+ unexcoff.c
Michael Kifer: wrote ediff-diff.el ediff-help.el ediff-hook.el
ediff-init.el ediff-merg.el ediff-mult.el ediff-ptch.el ediff-util.el
Microelectronics and Computer Technology Corporation: changed
emacsclient.c etags.c lisp.h movemail.c rmail.el rmailedit.el
rmailkwd.el rmailmsc.el rmailout.el rmailsum.el scribe.el server.el
- sysdep.c unexec.c xmenu.c
+ sysdep.c unexcoff.c xmenu.c
Mikael Djurfeldt: changed xdisp.c
Richard Mlynarik: wrote cl-indent.el ebuff-menu.el ehelp.el rfc822.el
terminal.el yow.el
and changed files.el sysdep.c rmail.el info.el keyboard.c bytecomp.el
- fileio.c simple.el process.c startup.el window.c editfns.c unexec.c
+ fileio.c simple.el process.c startup.el window.c editfns.c unexcoff.c
xfns.c keymap.c minibuf.c sendmail.el buffer.c dispnew.c emacs.c
subr.el and 129 other files
ls-lisp.el w32proc.c
Spencer Thomas: changed dabbrev.el emacsclient.c gnus.texi server.el
- unexec.c
+ unexcoff.c
Sriram Karra: changed message.el
+2010-08-05 Eli Zaretskii <eliz@gnu.org>
+
+ * AUTHORS: Rename unexec.o => unexcoff.o.
+ * PROBLEMS: Rename unexec.o => unexcoff.o.
+
2010-07-31 Eli Zaretskii <eliz@gnu.org>
* tutorials/TUTORIAL.he: New file.
Two causes have been seen for such problems.
1) On a system where getpagesize is not a system call, it is defined
-as a macro. If the definition (in both unexec.c and malloc.c) is wrong,
+as a macro. If the definition (in both unex*.c and malloc.c) is wrong,
it can cause problems like this. You might be able to find the correct
value in the man page for a.out (5).
+2010-08-05 Eli Zaretskii <eliz@gnu.org>
+
+ * emacs-lisp/find-gc.el (find-gc-source-files): Rename
+ unexec.c => unexcoff.c.
+
+ * emacs-lisp/authors.el (authors-fixed-entries): Rename
+ unexec.c => unexcoff.c.
+
2010-08-05 Michael Albinus <michael.albinus@gmx.de>
* net/tramp.el (tramp-handle-dired-uncache): Flush directory
;; No longer distributed.
;;; ("Viktor Dukhovni" :wrote "unexsunos4.c")
("Paul Eggert" :wrote "rcs2log" "vcdiff")
- ("Fred Fish" :changed "unexec.c")
+ ("Fred Fish" :changed "unexcoff.c")
;; No longer distributed.
;;; ("Tim Fleehart" :wrote "makefile.nt")
("Keith Gabryelski" :wrote "hexl.c")
"indent.c" "search.c" "xdisp.c" "region-cache.c" "region-cache.h")
;; ibmrt.h, ibmrt-aix.h no longer distributed.
("International Business Machines" :changed "emacs.c" "fileio.c"
- "process.c" "sysdep.c" "unexec.c")
+ "process.c" "sysdep.c" "unexcoff.c")
;; No longer distributed.
;;; ("Ishikawa Chiaki" :changed "aviion.h" "dgux.h")
;; ymakefile no longer distributed.
("Michael K. Johnson" :changed "configure.in" "emacs.c" "intel386.h"
"mem-limits.h" "process.c" "template.h" "sysdep.c" "syssignal.h"
- "systty.h" "unexec.c" "linux.h")
+ "systty.h" "unexcoff.c" "linux.h")
;; No longer distributed.
;;; ("Kyle Jones" :wrote "mldrag.el")
("Henry Kautz" :wrote "bib-mode.el")
"rmail.el" "rmailedit.el" "rmailkwd.el"
"rmailmsc.el" "rmailout.el" "rmailsum.el" "scribe.el"
;; It was :wrote for xmenu.c, but it has been rewritten since.
- "server.el" "lisp.h" "sysdep.c" "unexec.c" "xmenu.c")
+ "server.el" "lisp.h" "sysdep.c" "unexcoff.c" "xmenu.c")
("Niall Mansfield" :changed "etags.c")
("Brian Marick" :cowrote "hideif.el")
("Marko Kohtala" :changed "info.el")
("Kayvan Sylvan" :changed "supercite.el")
;; No longer distributed: emacsserver.c, tcp.c.
("Spencer Thomas" :changed "emacsclient.c" "server.el"
- "dabbrev.el" "unexec.c" "gnus.texi")
+ "dabbrev.el" "unexcoff.c" "gnus.texi")
("Jonathan Vail" :changed "vc.el")
- ("James Van Artsdalen" :changed "usg5-4.h" "unexec.c")
+ ("James Van Artsdalen" :changed "usg5-4.h" "unexcoff.c")
;; No longer distributed: src/makefile.nt, lisp/makefile.nt
;; winnt.el renamed to w32-fns.el; nt.[ch] to w32.[ch];
;; ntheap.[ch] to w32heap.[ch]; ntinevt.c to w32inevt.c;
"indent.c" "search.c" "regex.c" "undo.c"
"alloc.c" "data.c" "doc.c" "editfns.c"
"callint.c" "eval.c" "fns.c" "print.c" "lread.c"
- "abbrev.c" "syntax.c" "unexec.c"
+ "abbrev.c" "syntax.c" "unexcoff.c"
"bytecode.c" "process.c" "callproc.c" "doprnt.c"
"x11term.c" "x11fns.c"))
+2010-08-05 Eli Zaretskii <eliz@gnu.org>
+
+ * sed1v2.inp (UNEXEC_OBJ): Edit to unexcoff.o, due to renaming of
+ unexec.c => unexcoff.c.
+
2010-07-29 Chad Brown <yandros@mit.edu>
* sed2v2.inp (HAVE_DIRENT_H): Edit to 1.
/^RALLOC_OBJ *=/s/@RALLOC_OBJ@/ralloc.o/
/^PRE_ALLOC_OBJ *=/s/@PRE_ALLOC_OBJ@/lastfile.o/
/^POST_ALLOC_OBJ *=/s/@POST_ALLOC_OBJ@/$(vmlimitobj)/
-/^UNEXEC_OBJ *=/s/@UNEXEC_OBJ@/unexec.o/
+/^UNEXEC_OBJ *=/s/@UNEXEC_OBJ@/unexcoff.o/
/^CANNOT_DUMP *=/s/@CANNOT_DUMP@/no/
/^DEPFLAGS *=/s/@DEPFLAGS@//
/^MKDEPDIR *=/s/@MKDEPDIR@//
+2010-08-05 Eli Zaretskii <eliz@gnu.org>
+
+ * deps.mk (unexcoff.o): Rename unexec.[co] => unexcoff.[co].
+
+ * unexcoff.c: Renamed from unexec.c.
+
2010-08-04 Stefan Monnier <monnier@iro.umontreal.ca>
* sysdep.c (child_setup_tty): Comment-out left-over non-ICANON code.
unexaix.o: unexaix.c lisp.h $(config_h)
unexalpha.o: unexalpha.c $(config_h)
unexcw.o: unexcw.c lisp.h $(config_h)
-unexec.o: unexec.c lisp.h $(config_h)
+unexcoff.o: unexcoff.c lisp.h $(config_h)
unexelf.o: unexelf.c $(config_h)
unexhp9k800.o: unexhp9k800.c $(config_h)
unexmacosx.o: unexmacosx.c $(config_h)
--- /dev/null
+/* 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/>. */
+
+
+/*
+ * unexcoff.c - Convert a running program into an a.out or COFF file.
+ *
+ * ==================================================================
+ * Note: This file is currently used only by the MSDOS (a.k.a. DJGPP)
+ * build of Emacs. If you are not interested in the MSDOS build, you
+ * are looking at the wrong version of unexec!
+ * ==================================================================
+ *
+ * Author: Spencer W. Thomas
+ * Computer Science Dept.
+ * University of Utah
+ * Date: Tue Mar 2 1982
+ * Originally under the name unexec.c.
+ * 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
+}
+\f
+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);
+
+}
+\f
+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;
+}
+\f
+/* ****************************************************************
+ * 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;
+}
+\f
+/* ****************************************************************
+ * 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);
+}
+\f
+
+/*
+ * 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) */
+++ /dev/null
-/* 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
-}
-\f
-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);
-
-}
-\f
-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;
-}
-\f
-/* ****************************************************************
- * 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;
-}
-\f
-/* ****************************************************************
- * 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);
-}
-\f
-
-/*
- * 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) */
projects / emacs.git / commitdiff