minix/lib/libc/arch/hppa/sys/sbrk.S

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/* $NetBSD: sbrk.S,v 1.4 2009/11/03 05:07:25 snj Exp $ */
/* $OpenBSD: sbrk.S,v 1.7 2001/06/04 23:14:04 mickey 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"
#if defined(LIBC_SCCS) && !defined(lint)
RCSID("$NetBSD: sbrk.S,v 1.4 2009/11/03 05:07:25 snj Exp $")
#endif /* LIBC_SCCS and not lint */
.import end, data
#ifdef WEAK_ALIAS
WEAK_ALIAS(sbrk, _sbrk)
#endif
.data
.export curbrk, data
curbrk:
.long end
ENTRY(_sbrk,0)
#ifdef PIC
addil LT%curbrk, %r19
ldw RT%curbrk(%r1), %r1
ldw 0(%r1), %t2
#else /* !PIC */
ldil L%curbrk, %t1
ldw R%curbrk(%t1), %t2
#endif /* !PIC */
add %arg0, %t2, %arg0
stw %arg0, HPPA_FRAME_ARG(0)(%sp)
SYSCALL(break)
#ifdef PIC
addil LT%curbrk, %r19
ldw RT%curbrk(%r1), %r1
#else /* !PIC */
ldil L%curbrk, %t1
ldo R%curbrk(%t1), %r1
#endif /* !PIC */
ldw 0(%r1), %ret0
ldw HPPA_FRAME_ARG(0)(%sp), %arg0
bv %r0(%rp)
stw %arg0, 0(%r1)
EXIT(sbrk)
.end