[Linux-vax-usr-commit] glibc/sysdeps/unix/sysv/linux/vax syscall.S,NONE,1.1

[<ke...@us...>]

Update of /cvsroot/linux-vax/glibc/sysdeps/unix/sysv/linux/vax
In directory sc8-pr-cvs1:/tmp/cvs-serv13329

Added Files:
	syscall.S 
Log Message:
VAX implementation of syscall(2)


--- NEW FILE: syscall.S ---
/* Copyright (C) 1996 Free Software Foundation, Inc.
   This file is part of the GNU C Library.
   Contributed by David Mosberger <da...@az...>, 1996.

   The GNU C Library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Library General Public License as
   published by the Free Software Foundation; either version 2 of the
   License, or (at your option) any later version.

   The GNU C Library 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
   Library General Public License for more details.

   You should have received a copy of the GNU Library General Public
   License along with the GNU C Library; see the file COPYING.LIB.  If not,
   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
   Boston, MA 02111-1307, USA.  */

#include <sysdep.h>


/* This implements syscall(2).  The first argument is the syscall 
   number, the remaining args should be passed to the syscall */

ENTRY(syscall)
	.word 0x0 /* no registers to preserve */

	/* syscall number to R0 */
	movl 4(%ap), %r0

	/* replace syscall number with argcount-1 */
	subl3 $1, (%ap), 4(%ap)

	/* Points AP to the modified arg list, with the
	   first argument removed.*/
	moval 4(%ap), %ap

	chmk %r0

	cmpl $-4095, %r0
	bgtru no_error
	jmp SYSCALL_ERROR_LABEL

no_error:
	ret

END(syscall)