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

79 lines
2.2 KiB
ArmAsm
Raw Normal View History

/* $NetBSD: brk.S,v 1.5 2012/03/14 14:18:10 skrll Exp $ */
/* $OpenBSD: brk.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: brk.S,v 1.5 2012/03/14 14:18:10 skrll Exp $")
#endif /* LIBC_SCCS and not lint */
.import curbrk, data
.global _end
#ifdef WEAK_ALIAS
WEAK_ALIAS(brk, _brk)
#endif
.data
.export __minbrk, data
__minbrk:
.long _end
ENTRY(_brk,0)
#ifdef PIC
addil LT%__minbrk, %r19
ldw RT%__minbrk(%r1), %r1
ldw 0(%r1), %t2
#else /* !PIC */
ldil L%__minbrk, %t1
ldw R%__minbrk(%t1), %t2
#endif /* !PIC */
sub,<< %t2, %arg0, %r0
copy %t2, %arg0
stw %arg0, HPPA_FRAME_ARG(0)(%sp)
SYSCALL(break)
ldw HPPA_FRAME_ARG(0)(%sp), %arg0
#ifdef PIC
addil LT%curbrk, %r19
ldw RT%curbrk(%r1), %r1
bv %r0(%rp)
stw %arg0, 0(%r1)
#else /* !PIC */
ldil L%curbrk, %t1
bv %r0(%rp)
stw %arg0, R%curbrk(%t1)
#endif /* !PIC */
EXIT(brk)
.end