glibc/sysdeps/alpha/setjmp.S

/* Copyright (C) 1992, 1994 Free Software Foundation, Inc.
This file is part of the GNU C Library.

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., 675 Mass Ave,
Cambridge, MA 02139, USA.  */

#include <sysdep.h>

/* The function __sigsetjmp_aux saves all the registers, but it can't
   reliably access the stack or frame pointers, so we pass them in as
   extra arguments.  */
ENTRY (__sigsetjmp)
	ldgp	$29, 0($27)
	.prologue 1

	lda	$27, __sigsetjmp_aux	/* Load address to jump to.  */
	bis	$30, $30, $18		/* Pass SP as 3rd arg.  */
	bis	$15, $15, $19		/* Pass FP as 4th arg.  */
	jmp	$31, ($27), __sigsetjmp_aux /* Call __sigsetjmp_aux.  */

	END(__sigsetjmp)