Import Upstream version 4e6upstream/4e6

1 files changed, 614 insertions, 0 deletions

diff --git a/ecrt0.c b/ecrt0.c
new file mode 100644
index 0000000..a9c7f28
--- /dev/null
+++ b/ecrt0.c
@@ -0,0 +1,614 @@
+/* C code startup routine.
+   Copyright (C) 1985, 1986, 1992 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)
+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; see the file COPYING.  If not, write to
+the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+Boston, MA 02111-1307, USA.  */
+
+
+/* The standard Vax 4.2 Unix crt0.c cannot be used for Emacs
+   because it makes `environ' an initialized variable.
+   It is easiest to have a special crt0.c on all machines
+   though I don't know whether other machines actually need it.  */
+
+/* On the vax and 68000, in BSD4.2 and USG5.2,
+   this is the data format on startup:
+  (vax) ap and fp are unpredictable as far as I know; don't use them.
+  sp ->  word containing argc
+         word pointing to first arg string
+	 [word pointing to next arg string]... 0 or more times
+	 0
+Optionally:
+	 [word pointing to environment variable]... 1 or more times
+	 ...
+	 0
+And always:
+	 first arg string
+	 [next arg string]... 0 or more times
+*/
+
+/* On the 16000, at least in the one 4.2 system I know about,
+  the initial data format is
+  sp ->  word containing argc
+         word containing argp
+         word pointing to first arg string, and so on as above
+*/
+
+#ifdef emacs
+#include <config.h>
+#endif
+
+/*		********  WARNING ********
+    Do not insert any data definitions before data_start!
+    Since this is the first file linked, the address of the following
+    variable should correspond to the start of initialized data space.
+    On some systems this is a constant that is independent of the text
+    size for shared executables.  On others, it is a function of the
+    text size. In short, this seems to be the most portable way to
+    discover the start of initialized data space dynamically at runtime,
+    for either shared or unshared executables, on either swapping or
+    virtual systems.  It only requires that the linker allocate objects
+    in the order encountered, a reasonable model for most Unix systems.
+    Similarly, note that the address of _start() should be the start
+    of text space.   Fred Fish, UniSoft Systems Inc.  */
+
+int data_start = 0;
+
+#ifdef NEED_ERRNO
+int errno;
+#endif
+
+#ifndef DONT_NEED_ENVIRON
+char **environ;
+#endif
+
+#ifndef static
+/* On systems where the static storage class is usable, this function
+   should be declared as static.  Otherwise, the static keyword has
+   been defined to be something else, and code for those systems must
+   take care of this declaration appropriately.  */
+static start1 ();
+#endif
+
+#ifdef APOLLO
+extern	char   *malloc(), *realloc(), *(*_libc_malloc) (), *(*_libc_realloc)();
+extern	void	free(),	(*_libc_free) (); extern int main();
+std_$call void  unix_$main();
+
+_start()
+{
+	_libc_malloc = malloc;
+	_libc_realloc = realloc;
+	_libc_free = free;
+	unix_$main(main);	/* no return */
+}
+#endif /* APOLLO */
+
+#if defined(orion) || defined(pyramid) || defined(celerity) || defined(ALLIANT) || defined(clipper) || defined(sps7)
+
+#if defined(sps7) && defined(V3x)
+        asm("	section	10");
+        asm("	ds.b	0xb0");
+#endif
+
+#ifdef ALLIANT
+/* _start must initialize _curbrk and _minbrk on the first startup;
+   when starting up after dumping, it must initialize them to what they were
+   before the dumping, since they are in the shared library and
+   are not dumped.  See ADJUST_EXEC_HEADER in m-alliant.h.  */
+extern unsigned char *_curbrk, *_minbrk;
+extern unsigned char end;
+unsigned char *_setbrk = &end;
+#ifdef ALLIANT_2800
+unsigned char *_end = &end;
+#endif
+#endif
+
+#ifndef DUMMIES
+#define DUMMIES
+#endif
+
+_start (DUMMIES argc, argv, envp)
+     int argc;
+     char **argv, **envp;
+{
+#ifdef ALLIANT
+#ifdef ALLIANT_2800
+  _curbrk = _end;
+  _minbrk = _end;
+#else
+  _curbrk = _setbrk;
+  _minbrk = _setbrk;
+#endif
+#endif
+
+  environ = envp;
+
+  exit (main (argc, argv, envp));
+}
+
+#endif /* orion or pyramid or celerity or alliant or clipper */
+
+#if defined (ns16000) && !defined (sequent) && !defined (UMAX) && !defined (CRT0_DUMMIES)
+
+_start ()
+{
+/* On 16000, _start pushes fp onto stack */
+  start1 ();
+}
+
+/* ignore takes care of skipping the fp value pushed in start.  */
+static
+start1 (ignore, argc, argv)
+     int ignore;
+     int argc;
+     register char **argv;
+{
+  environ = argv + argc + 1;
+
+  if (environ == *argv)
+    environ--;
+  exit (main (argc, argv, environ));
+}
+#endif /* ns16000, not sequent and not UMAX, and not the CRT0_DUMMIES method */
+
+#ifdef UMAX
+_start()
+{
+	asm("	exit []			# undo enter");
+	asm("	.set	exitsc,1");
+	asm("	.set	sigcatchall,0x400");
+
+	asm("	.globl	_exit");
+	asm("	.globl	start");
+	asm("	.globl	__start");
+	asm("	.globl	_main");
+	asm("	.globl	_environ");
+	asm("	.globl	_sigvec");
+	asm("	.globl	sigentry");
+
+	asm("start:");
+	asm("	br	.xstart");
+	asm("	.org	0x20");
+	asm("	.double	p_glbl,0,0xf00000,0");
+	asm("	.org	0x30");
+	asm(".xstart:");
+	asm("	adjspb	$8");
+	asm("	movd	8(sp),0(sp)	# argc");
+	asm("	addr	12(sp),r0");
+	asm("	movd	r0,4(sp)	# argv");
+	asm("L1:");
+	asm("	movd	r0,r1");
+	asm("	addqd	$4,r0");
+	asm("	cmpqd	$0,0(r1)	# null args term ?");
+	asm("	bne	L1");
+	asm("	cmpd	r0,0(4(sp))	# end of 'env' or 'argv' ?");
+	asm("	blt	L2");
+	asm("	addqd	$-4,r0		# envp's are in list");
+	asm("L2:");
+	asm("	movd	r0,8(sp)	# env");
+	asm("	movd	r0,@_environ	# indir is 0 if no env ; not 0 if env");
+	asm("	movqd	$0,tos		# setup intermediate signal handler");
+	asm("	addr	@sv,tos");
+	asm("	movzwd	$sigcatchall,tos");
+	asm("	jsr	@_sigvec");
+	asm("	adjspb	$-12");
+	asm("	jsr	@_main");
+	asm("	adjspb	$-12");
+	asm("	movd	r0,tos");
+	asm("	jsr	@_exit");
+	asm("	adjspb	$-4");
+	asm("	addr	@exitsc,r0");
+	asm("	svc");
+	asm("	.align	4		# sigvec arg");
+	asm("sv:");
+	asm("	.double	sigentry");
+	asm("	.double	0");
+	asm("	.double	0");
+
+	asm("	.comm	p_glbl,1");
+}
+#endif /* UMAX */
+
+#ifdef CRT0_DUMMIES
+
+/* Define symbol "start": here; some systems want that symbol.  */
+#ifdef DOT_GLOBAL_START
+asm("	.text		");
+asm("	.globl start	");
+asm("	start:		");
+#endif /* DOT_GLOBAL_START */
+
+#ifdef NODOT_GLOBAL_START
+asm("	text		");
+asm("	global start	");
+asm("	start:		");
+#endif /* NODOT_GLOBAL_START */
+
+#ifdef m68000
+
+/* GCC 2.1, when optimization is turned off, seems to want to push a
+   word of garbage on the stack, which screws up the CRT0_DUMMIES
+   hack.  So we hand-code _start in assembly language.  */
+asm(".text			");
+asm("	.even			");
+asm(".globl __start		");
+asm("__start:			");
+asm("	link a6,#0		");
+asm("	jbsr _start1		");
+asm("	unlk a6			");
+asm("	rts			");
+
+#else /* not m68000 */
+
+_start ()
+{
+/* On vax, nothing is pushed here  */
+/* On sequent, bogus fp is pushed here  */
+  start1 ();
+}
+
+#endif /* possibly m68000 */
+
+static
+start1 (CRT0_DUMMIES argc, xargv)
+     int argc;
+     char *xargv;
+{
+  register char **argv = &xargv;
+  environ = argv + argc + 1;
+
+  if ((char *)environ == xargv)
+    environ--;
+  exit (main (argc, argv, environ));
+
+  /* Refer to `start1' so GCC will not think it is never called
+     and optimize it out.  */
+  (void) &start1;
+}
+#else /* not CRT0_DUMMIES */
+
+/* "m68k" and "m68000" both stand for m68000 processors,
+   but with different program-entry conventions.
+   This is a kludge.  Now that the CRT0_DUMMIES mechanism above exists,
+   most of these machines could use the vax code above
+   with some suitable definition of CRT0_DUMMIES.
+   Then the symbol m68k could be flushed.
+   But I don't want to risk breaking these machines
+   in a version 17 patch release, so that change is being put off.  */
+
+#ifdef m68k			/* Can't do it all from C */
+	asm ("	global	_start");
+	asm ("	text");
+	asm ("_start:");
+#ifndef NU
+#ifdef STRIDE
+	asm ("	comm	havefpu%,2");
+#else /* m68k, not STRIDE */
+	asm ("  comm	splimit%,4");
+#endif /* STRIDE */
+	asm ("	global	exit");
+	asm ("	text");
+#ifdef STRIDE
+	asm ("	trap	&3");
+	asm ("	mov.w	%d0,havefpu%");
+#else /* m68k, not STRIDE */
+  	asm ("	mov.l	%d0,splimit%");
+#endif /* STRIDE */
+#endif /* not NU */
+	asm ("	jsr	start1");
+	asm ("	mov.l	%d0,(%sp)");
+	asm ("	jsr	exit");
+	asm ("	mov.l	&1,%d0");	/* d0 = 1 => exit */
+	asm ("	trap	&0");
+#else /* m68000, not m68k */
+
+#ifdef m68000
+
+#ifdef ISI68K
+/* Added by ESM Sun May 24 12:44:02 1987 to get new ISI library to work */
+/* Edited by Ray Mon May 15 15:59:56 EST 1989 so we can compile with gcc */
+#if defined(BSD4_3) && !defined(__GNUC__)
+static foo () {
+#endif
+	asm ("	.globl  is68020");
+	asm ("is68020:");
+#ifndef BSD4_3
+	asm ("	.long   0x00000000");
+	asm ("	.long   0xffffffff");
+/* End of stuff added by ESM */
+#endif
+	asm ("	.text");
+	asm ("	.globl	__start");
+	asm ("__start:");
+	asm ("	.word 0");
+	asm ("	link	a6,#0");
+	asm ("	jbsr	_start1");
+	asm ("	unlk	a6");
+	asm ("	rts");
+#if defined(BSD4_3) && !defined(__GNUC__)
+      }
+#endif
+#else /* not ISI68K */
+
+_start ()
+{
+#ifdef sun
+#ifdef LISP_FLOAT_TYPE
+  finitfp_();
+#endif
+#endif     
+/* On 68000, _start pushes a6 onto stack  */
+  start1 ();
+}
+#endif /* not ISI68k */
+#endif /* m68000 */
+#endif /* m68k */
+
+#if defined(m68k) || defined(m68000)
+/* ignore takes care of skipping the a6 value pushed in start.  */
+static
+#if defined(m68k)
+start1 (argc, xargv)
+#else
+start1 (ignore, argc, xargv)
+#endif
+     int argc;
+     char *xargv;
+{
+  register char **argv = &xargv;
+  environ = argv + argc + 1;
+
+  if ((char *)environ == xargv)
+    environ--;
+#ifdef sun_68881
+  asm("    jsr     f68881_used");
+#endif
+#ifdef sun_fpa
+  asm("    jsr     ffpa_used");
+#endif
+#ifdef sun_soft
+  asm("    jsr     start_float");
+#endif
+  exit (main (argc, argv, environ));
+}
+
+#endif /* m68k or m68000 */
+
+#endif /* not CRT0_DUMMIES */
+
+#ifdef hp9000s300
+int argc_value;
+char **argv_value;
+#ifdef OLD_HP_ASSEMBLER
+	asm("   text");
+	asm("	globl __start");
+	asm("	globl _exit");
+	asm("	globl _main");
+	asm("__start");
+	asm("	dc.l	0");
+	asm("	subq.w	#0x1,d0");
+	asm("	move.w	d0,float_soft");
+	asm("	move.l	0x4(a7),d0");
+	asm("	beq.s	skip_1");
+	asm("	move.l	d0,a0");
+	asm("	clr.l	-0x4(a0)");
+	asm("skip_1");
+	asm("	move.l	a7,a0");
+	asm("	subq.l	#0x8,a7");
+	asm("	move.l	(a0),(a7)");
+	asm("	move.l	(a0),_argc_value");
+	asm("	addq.l	#0x4,a0");
+	asm("	move.l	a0,0x4(a7)");
+	asm("	move.l	a0,_argv_value");
+	asm("incr_loop");
+	asm("	tst.l	(a0)+");
+	asm("	bne.s	incr_loop");
+	asm("	move.l	0x4(a7),a1");
+	asm("	cmp.l	(a1),a0");
+	asm("	blt.s	skip_2");
+	asm("	subq.l	#0x4,a0");
+	asm("skip_2");
+	asm("	move.l	a0,0x8(a7)");
+	asm("	move.l	a0,_environ");
+	asm("	jsr	_main");
+	asm("	addq.l	#0x8,a7");
+	asm("	move.l	d0,-(a7)");
+	asm("	jsr	_exit");
+	asm("	move.w	#0x1,d0");
+	asm("	trap	#0x0");
+	asm("	comm	float_soft,4");
+/* float_soft is allocated in this way because C would
+   put an underscore character in its name otherwise. */
+
+#else /* new hp assembler */
+
+	asm("	text");
+        asm("   global  float_loc");
+        asm("   set     float_loc,0xFFFFB000");
+ 	asm("	global	fpa_loc");
+	asm("	set	fpa_loc,0xfff08000");
+	asm("	global	__start");
+	asm("	global	_exit");
+	asm("	global	_main");
+	asm("__start:");
+	asm("	byte	0,0,0,0");
+	asm("	subq.w	&1,%d0");
+	asm("	mov.w	%d0,float_soft");
+	asm("	mov.w	%d1,flag_68881");
+#ifndef HPUX_68010
+	asm("	beq.b	skip_float");
+	asm("	fmov.l	&0x7400,%fpcr");
+/*	asm("	fmov.l	&0x7480,%fpcr"); */
+#endif /* HPUX_68010 */
+	asm("skip_float:");
+	asm("	mov.l	%a0,%d0");
+	asm("	add.l	%d0,%d0");
+	asm("	subx.w	%d1,%d1");
+	asm("	mov.w	%d1,flag_68010");
+	asm("	add.l	%d0,%d0");
+	asm("	subx.w	%d1,%d1");
+	asm("	mov.w	%d1,flag_fpa");
+	asm("	tst.l	%d2");
+	asm("	ble.b	skip_3");
+	asm("	lsl	flag_68881");
+	asm("	lsl	flag_fpa");
+	asm("skip_3:");
+	asm("	mov.l	4(%a7),%d0");
+	asm("	beq.b	skip_1");
+	asm("	mov.l	%d0,%a0");
+	asm("	clr.l	-4(%a0)");
+	asm("skip_1:");
+	asm("	mov.l	%a7,%a0");
+	asm("	subq.l	&8,%a7");
+	asm("	mov.l	(%a0),(%a7)");
+	asm("	mov.l	(%a0),_argc_value");
+	asm("	addq.l	&4,%a0");
+	asm("	mov.l	%a0,4(%a7)");
+	asm("	mov.l	%a0,_argv_value");
+	asm("incr_loop:");
+	asm("	tst.l	(%a0)+");
+	asm("	bne.b	incr_loop");
+	asm("	mov.l	4(%a7),%a1");
+	asm("	cmp.l	%a0,(%a1)");
+	asm("	blt.b	skip_2");
+	asm("	subq.l	&4,%a0");
+	asm("skip_2:");
+	asm("	mov.l	%a0,8(%a7)");
+	asm("	mov.l	%a0,_environ");
+	asm("	jsr	_main");
+	asm("	addq.l	&8,%a7");
+	asm("	mov.l	%d0,-(%a7)");
+	asm("	jsr	_exit");
+	asm("	mov.w	&1,%d0");
+	asm("	trap	&0");
+	asm("	comm	float_soft, 4");
+	asm("	comm	flag_68881, 4");
+	asm("	comm	flag_68010, 4");
+	asm("	comm	flag_68040, 4");
+	asm("	comm	flag_fpa, 4");
+
+#endif /* new hp assembler */
+#endif /* hp9000s300 */
+
+#ifdef GOULD
+
+/* startup code has to be in near text rather
+   than fartext as allocated by the C compiler. */
+	asm("	.text");
+	asm("	.align	2");
+	asm("	.globl	__start");
+	asm("	.text");
+	asm("__start:");
+/* setup base register b1 (function base). */
+	asm("	.using	b1,.");
+	asm("	tpcbr	b1");
+/* setup base registers b3 through b7 (data references). */
+	asm("	file	basevals,b3");
+/* setup base register b2 (stack pointer); it should be
+   aligned on a 8-word boundary; but because it is pointing
+   to argc, its value should be remembered (in r5). */
+	asm("	movw	b2,r4");
+	asm("	movw	b2,r5");
+	asm("	andw	#~0x1f,r4");
+	asm("	movw	r4,b2");
+/* allocate stack frame to do some work. */
+	asm("	subea	16w,b2");
+/* initialize signal catching for UTX/32 1.2; this is
+   necessary to make restart from saved image work. */
+	asm("	movea	sigcatch,r1");
+	asm("	movw	r1,8w[b2]");
+	asm("	svc	#1,#150");
+/* setup address of argc for start1. */
+	asm("	movw	r5,8w[b2]");
+	asm("   func	#1,_start1");
+	asm("	halt");
+/* space for ld to store base register initial values. */
+	asm("	.align	5");
+	asm("basevals:");
+	asm("	.word	__base3,__base4,__base5,__base6,__base7");
+
+static
+start1 (xargc)
+     int *xargc;
+{
+  register int	argc;
+  register char **argv;
+
+  argc = *xargc;
+  argv = (char **)(xargc) + 1;
+  environ = argv + argc + 1;
+
+  if (environ == argv)
+    environ--;
+  exit (main (argc, argv, environ));
+
+}
+
+#endif /* GOULD */
+
+#ifdef elxsi
+#include <elxsi/argvcache.h>
+
+extern char **environ;
+extern int	errno;
+extern void	_init_doscan(), _init_iob();
+extern char	end[];
+char		*_init_brk = end;
+
+_start()
+{
+  environ = exec_cache.ac_envp;
+  brk (_init_brk);
+  errno = 0;
+  _init_doscan ();
+  _init_iob ();
+  _exit (exit (main (exec_cache.ac_argc,
+		     exec_cache.ac_argv,
+		     exec_cache.ac_envp)));
+}
+#endif /* elxsi */
+
+
+#ifdef sparc
+asm (".global __start");
+asm (".text");
+asm ("__start:");
+asm ("	mov	0, %fp");
+asm ("	ld	[%sp + 64], %o0");
+asm ("	add	%sp, 68, %o1");
+asm ("	sll	%o0, 2,	%o2");
+asm ("	add	%o2, 4,	%o2");
+asm ("	add	%o1, %o2, %o2");
+asm ("	sethi	%hi(_environ), %o3");
+asm ("	st	%o2, [%o3+%lo(_environ)]");
+asm ("	andn	%sp, 7,	%sp");
+asm ("	call	_main");
+asm ("	sub	%sp, 24, %sp");
+asm ("	call	__exit");
+asm ("	nop");
+
+#endif /* sparc */
+
+#if __FreeBSD__ == 2
+char *__progname;
+#endif
+#ifdef __bsdi__
+#include <sys/param.h> /* for version number */
+#if defined(_BSDI_VERSION) && (_BSDI_VERSION >= 199501)
+char *__progname;
+#endif
+#endif /* __bsdi__ */