/*	$OpenBSD: sbrk.S,v 1.4 2011/04/21 14:12:20 jsing Exp $	*/

/*
 * Copyright (c) 1999 Michael Shalayeff
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR OR HIS RELATIVES BE LIABLE FOR ANY DIRECT,
 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 * SERVICES; LOSS OF MIND, USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
 * THE POSSIBILITY OF SUCH DAMAGE.
 */

#include "SYS.h"

	.import	end, data

	.data
	.export	__curbrk, data
__curbrk
	.long	end

SYSENTRY(sbrk)
#ifdef PIC
	addil	LT%__curbrk, %r19
	ldd	RT%__curbrk(%r1), %arg3
	ldd	0(%arg3), %arg2
#else
	ldil	L%__curbrk, %arg3
	ldd	R%__curbrk(%arg3), %arg2
#endif
	add	%arg0, %arg2, %arg0
	std	%arg0, HPPA_FRAME_ARG(0)(%sp)

	SYSCALL(break)

#ifdef PIC
	addil	LT%__curbrk, %r19
	ldd	RT%__curbrk(%r1), %arg3
#else
	ldil	L%__curbrk, %arg3
	ldo	R%__curbrk(%arg3), %arg3
#endif
	ldd	HPPA_FRAME_ARG(0)(%sp), %arg0
	ldd	0(%arg3), %ret0
	bv	%r0(%rp)
	std	%arg0, 0(%arg3)

SYSEXIT(sbrk)

	.end