-/* Copyright (C) 1985,86,87,88,92,93,94 Free Software Foundation, Inc.
+/* Copyright (C) 1985, 1986, 1987, 1988, 1992, 1993, 1994, 2001, 2002, 2003,
+ 2004, 2005, 2006, 2007, 2008 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 2, or (at your option)
+the Free Software Foundation; either version 3, or (at your option)
any later version.
GNU Emacs is distributed in the hope that it will be useful,
You should have received a copy of the GNU General Public License
along with GNU Emacs; see the file COPYING. If not, write to
-the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
+the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+Boston, MA 02110-1301, USA. */
/*
Define this if your system uses COFF for executables.
-* COFF_ENCAPSULATE
-
-Define this if you are using the GNU coff encapsulated a.out format.
-This is closer to a.out than COFF. You should *not* define COFF if
-you define COFF_ENCAPSULATE
-
-Otherwise we assume you use Berkeley format.
-
* NO_REMAP
Define this if you do not want to try to save Emacs's pure data areas
program text). HDR's standard fields are already correct, except that
this adjustment to the `a_text' field has not yet been made;
thus, the amount of offset can depend on the data in the file.
-
+
* A_TEXT_SEEK(HDR)
If defined, this macro specifies the number of bytes to seek into the
a.out file before starting to write the text segment.
-* EXEC_MAGIC
-
-For machines using COFF, this macro, if defined, is a value stored
-into the magic number field of the output file.
-
* ADJUST_EXEC_HEADER
This macro can be used to generate statements to adjust or
#ifndef emacs
#define PERROR(arg) perror (arg); return -1
#else
-#define IN_UNEXEC
#include <config.h>
#define PERROR(file) report_error (file, new)
#endif
#ifndef CANNOT_DUMP /* all rest of file! */
-#ifndef CANNOT_UNEXEC /* most of rest of file */
-
-#ifdef COFF_ENCAPSULATE
-int need_coff_header = 1;
-#include <coff-encap/a.out.encap.h> /* The location might be a poor assumption */
-#else
-#ifdef MSDOS
+#if defined(COFF) && defined(HAVE_COFF_H)
#include <coff.h>
+#ifdef MSDOS
+#if __DJGPP__ > 1
+#include <fcntl.h> /* for O_RDONLY, O_RDWR */
+#include <crt0.h> /* for _crt0_startup_flags and its bits */
+static int save_djgpp_startup_flags;
+#endif /* __DJGPP__ > 1 */
#define filehdr external_filehdr
#define scnhdr external_scnhdr
#define syment external_syment
unsigned long text_start;/* base of text used for this file */
unsigned long data_start;/* base of data used for this file */
};
-
-
-#else /* not MSDOS */
-#include <a.out.h>
#endif /* not MSDOS */
-#endif
+#else /* not COFF */
+#include <a.out.h>
+#endif /* not COFF */
-/* Define getpagesize () if the system does not.
- Note that this may depend on symbols defined in a.out.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 */
static long text_scnptr;
static long data_scnptr;
+static long coff_offset;
+
#else /* not COFF */
#ifdef HPUX
#define SYMS_START ((long) N_SYMOFF (ohdr))
-/* Some machines override the structure name for an a.out header. */
-#ifndef EXEC_HDR_TYPE
-#define EXEC_HDR_TYPE struct exec
-#endif
-
#ifdef HPUX
#ifdef HP9000S200_ID
#define MY_ID HP9000S200_ID
static MAGIC NEWMAGIC = {MY_ID, DEMAND_MAGIC};
#define N_TXTOFF(x) TEXT_OFFSET(x)
#define N_SYMOFF(x) LESYM_OFFSET(x)
-static EXEC_HDR_TYPE hdr, ohdr;
+static struct exec hdr, ohdr;
#else /* not HPUX */
-#if defined (USG) && !defined (IBMAIX) && !defined (IRIS) && !defined (COFF_ENCAPSULATE) && !defined (LINUX)
+#if defined (USG) && !defined (IRIS) && !defined (GNU_LINUX)
static struct bhdr hdr, ohdr;
#define a_magic fmagic
#define a_text tsize
(((x).fmagic)!=OMAGIC && ((x).fmagic)!=NMAGIC &&\
((x).fmagic)!=FMAGIC && ((x).fmagic)!=IMAGIC)
#define NEWMAGIC FMAGIC
-#else /* IRIS or IBMAIX or not USG */
-static EXEC_HDR_TYPE hdr, ohdr;
+#else /* IRIS or not USG */
+static struct exec hdr, ohdr;
#define NEWMAGIC ZMAGIC
-#endif /* IRIS or IBMAIX not USG */
+#endif /* IRIS or not USG */
#endif /* not HPUX */
static int unexec_text_start;
static int unexec_data_start;
-#ifdef COFF_ENCAPSULATE
-/* coffheader is defined in the GNU a.out.encap.h file. */
-struct coffheader coffheader;
-#endif
-
#endif /* not COFF */
static int pagemask;
static int copy_sym ();
static void mark_x ();
-/* ****************************************************************
- * 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
-#ifdef COFF
-#ifndef COFF_BSD_SYMBOLS
- || adjust_lnnoptrs (new, a_out, new_name) < 0
-#endif
-#endif
- )
- {
- 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;
-}
-
/* ****************************************************************
* make_hdr
*
}
#ifdef COFF
+ coff_offset = 0L; /* stays zero, except in DJGPP */
+
/* Salvage as much info from the existing file as possible */
if (a_out >= 0)
{
+#ifdef MSDOS
+#if __DJGPP__ > 1
+ /* 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 /* __DJGPP__ > 1 */
+#endif /* MSDOS */
if (read (a_out, &f_hdr, sizeof (f_hdr)) != sizeof (f_hdr))
{
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))
{
#endif
f_hdr.f_flags |= (F_RELFLG | F_EXEC);
-#ifdef TPIX
- f_hdr.f_nscns = 3;
-#endif
-#ifdef EXEC_MAGIC
- f_ohdr.magic = EXEC_MAGIC;
-#endif
#ifndef NO_REMAP
f_ohdr.text_start = (long) start_of_text ();
f_ohdr.tsize = data_start - f_ohdr.text_start;
#endif /* NO_REMAP */
f_ohdr.dsize = bss_start - f_ohdr.data_start;
f_ohdr.bsize = bss_end - bss_start;
-#ifndef KEEP_OLD_TEXT_SCNPTR
/* On some machines, the old values are right.
??? Maybe on all machines with NO_REMAP. */
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));
-#endif /* KEEP_OLD_TEXT_SCNPTR */
#ifdef ADJUST_TEXT_SCNHDR_SIZE
/* On some machines, `text size' includes all headers. */
f_thdr.s_size -= f_thdr.s_scnptr;
f_thdr.s_scnptr
= (f_thdr.s_scnptr + SECTION_ALIGNMENT) & ~SECTION_ALIGNMENT;
#endif /* SECTION_ALIGNMENT */
-#ifdef TPIX
- f_thdr.s_scnptr = 0xd0;
-#endif
text_scnptr = f_thdr.s_scnptr;
-#ifdef ADJUST_TEXTBASE
- text_scnptr = sizeof (f_hdr) + sizeof (f_ohdr) + (f_hdr.f_nscns) * (sizeof (f_thdr));
-#endif
-#ifndef KEEP_OLD_PADDR
f_dhdr.s_paddr = f_ohdr.data_start;
-#endif /* KEEP_OLD_PADDR */
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;
= (f_dhdr.s_scnptr + DATA_SECTION_ALIGNMENT) & ~DATA_SECTION_ALIGNMENT;
#endif /* DATA_SECTION_ALIGNMENT */
data_scnptr = f_dhdr.s_scnptr;
-#ifndef KEEP_OLD_PADDR
f_bhdr.s_paddr = f_ohdr.data_start + f_ohdr.dsize;
-#endif /* KEEP_OLD_PADDR */
f_bhdr.s_vaddr = f_ohdr.data_start + f_ohdr.dsize;
f_bhdr.s_size = f_ohdr.bsize;
f_bhdr.s_scnptr = 0L;
* will not adjust the file pointer for that section correctly.
*/
- lseek (a_out, sizeof (f_hdr) + sizeof (f_ohdr), 0);
+ /* This used to use sizeof (f_ohdr) instead of .f_opthdr.
+ .f_opthdr is said to be right when there is no optional header. */
+ lseek (a_out, sizeof (f_hdr) + f_hdr.f_opthdr, 0);
for (scns = f_hdr.f_nscns; scns > 0; scns--)
{
/* Get symbol table info from header of a.out file if given one. */
if (a_out >= 0)
{
-#ifdef COFF_ENCAPSULATE
- if (read (a_out, &coffheader, sizeof coffheader) != sizeof coffheader)
- {
- PERROR(a_name);
- }
- if (coffheader.f_magic != COFF_MAGIC)
- {
- ERROR1("%s doesn't have legal coff magic number\n", a_name);
- }
-#endif
if (read (a_out, &ohdr, sizeof hdr) != sizeof hdr)
{
PERROR (a_name);
}
else
{
-#ifdef COFF_ENCAPSULATE
- /* We probably could without too much trouble. The code is in gld
- * but I don't have that much time or incentive.
- */
- ERROR0 ("can't build a COFF file from scratch yet");
-#else
#ifdef MSDOS /* Demacs 1.1.1 91/10/16 HIRANO Satoshi */
bzero ((void *)&hdr, sizeof hdr);
#else
bzero (&hdr, sizeof hdr);
-#endif
#endif
}
#endif /* not NO_REMAP */
-#ifdef COFF_ENCAPSULATE
- /* We are encapsulating BSD format within COFF format. */
- {
- struct coffscn *tp, *dp, *bp;
- tp = &coffheader.scns[0];
- dp = &coffheader.scns[1];
- bp = &coffheader.scns[2];
- tp->s_size = hdr.a_text + sizeof(struct exec);
- dp->s_paddr = data_start;
- dp->s_vaddr = data_start;
- dp->s_size = hdr.a_data;
- bp->s_paddr = dp->s_vaddr + dp->s_size;
- bp->s_vaddr = bp->s_paddr;
- bp->s_size = hdr.a_bss;
- coffheader.tsize = tp->s_size;
- coffheader.dsize = dp->s_size;
- coffheader.bsize = bp->s_size;
- coffheader.text_start = tp->s_vaddr;
- coffheader.data_start = dp->s_vaddr;
- }
- if (write (new, &coffheader, sizeof coffheader) != sizeof coffheader)
- {
- PERROR(new_name);
- }
-#endif /* COFF_ENCAPSULATE */
-
if (write (new, &hdr, sizeof hdr) != sizeof hdr)
{
PERROR (new_name);
}
+#if 0 /* This #ifndef caused a bug on GNU/Linux when using QMAGIC. */
/* This adjustment was done above only #ifndef NO_REMAP,
so only undo it now #ifndef NO_REMAP. */
-#ifndef NO_REMAP
+ /* #ifndef NO_REMAP */
+#endif
#ifdef A_TEXT_OFFSET
hdr.a_text -= A_TEXT_OFFSET (ohdr);
-#endif
#endif
return 0;
#endif /* not COFF */
}
\f
+write_segment (new, ptr, end)
+ int new;
+ register char *ptr, *end;
+{
+ register int i, nwrite, ret;
+ char buf[80];
+#ifndef USE_CRT_DLL
+ extern int errno;
+#endif
+ /* 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];
+
+ bzero (zeros, 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 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
*
#else /* COFF, but not USG_SHARED_LIBRARIES */
+#ifdef MSDOS
+#if __DJGPP__ >= 2
+ /* 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
+#endif
+
lseek (new, (long) text_scnptr, 0);
ptr = (char *) f_ohdr.text_start;
-#ifdef HEADER_INCL_IN_TEXT
- /* For Gould UTX/32, text starts after headers */
- ptr = (char *) (ptr + text_scnptr);
-#endif /* HEADER_INCL_IN_TEXT */
end = ptr + f_ohdr.tsize;
write_segment (new, ptr, end);
end = ptr + f_ohdr.dsize;
write_segment (new, ptr, end);
+#ifdef MSDOS
+#if __DJGPP__ >= 2
+ /* Restore our exception hooks. */
+ __djgpp_exception_toggle ();
+
+ /* Restore the startup flags. */
+ _crt0_startup_flags = save_djgpp_startup_flags;
+#endif
+#endif
+
#endif /* USG_SHARED_LIBRARIES */
#else /* if not COFF */
/* Some machines count the header as part of the text segment.
That is to say, the header appears in core
- just before the address that start_of_text () returns.
+ just before the address that start_of_text returns.
For them, N_TXTOFF is the place where the header goes.
We must adjust the seek to the place after the header.
Note that at this point hdr.a_text does *not* count
return 0;
}
-
-write_segment (new, ptr, end)
- int new;
- register char *ptr, *end;
-{
- register int i, nwrite, ret;
- char buf[80];
- extern int errno;
- char zeros[128];
-
- bzero (zeros, sizeof zeros);
-
- for (i = 0; ptr < end;)
- {
- /* distance to next multiple of 128. */
- nwrite = (((int) ptr + 128) & -128) - (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 (new, zeros, nwrite);
- 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);
- }
- i += nwrite;
- ptr += nwrite;
- }
-}
\f
/* ****************************************************************
* copy_sym
#ifdef COFF
if (lnnoptr) /* if there is line number info */
- lseek (a_out, lnnoptr, 0); /* start copying from there */
+ lseek (a_out, coff_offset + lnnoptr, 0); /* start copying from there */
else
-#endif /* COFF */
- lseek (a_out, SYMS_START, 0); /* Position a.out to symtab. */
+ lseek (a_out, coff_offset + SYMS_START, 0); /* Position a.out to symtab. */
+#else /* not COFF */
+ lseek (a_out, SYMS_START, 0); /* Position a.out to symtab. */
+#endif /* not COFF */
while ((n = read (a_out, page, sizeof page)) > 0)
{
{
register int nsyms;
register int new;
-#if defined (amdahl_uts) || defined (pfa)
- SYMENT symentry;
- AUXENT auxentry;
-#else
struct syment symentry;
union auxent auxentry;
-#endif
if (!lnnoptr || !f_hdr.f_symptr)
return 0;
#endif /* COFF */
-#endif /* not CANNOT_UNEXEC */
+/* ****************************************************************
+ * 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
+#ifdef COFF
+#ifndef COFF_BSD_SYMBOLS
+ || adjust_lnnoptrs (new, a_out, new_name) < 0
+#endif
+#endif
+ )
+ {
+ 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) */
HCoop / bpt / emacs.git / blobdiff