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/*-
* Copyright (c) 2002 Peter Grehan.
* 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 AND CONTRIBUTORS ``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 CONTRIBUTORS 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 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.
*/
/* $NetBSD: sbrk.S,v 1.8 2000/06/26 06:25:44 kleink Exp $ */
#include <machine/asm.h>
__FBSDID("$FreeBSD$");
#include "SYS.h"
.globl HIDENAME(curbrk)
.globl CNAME(_end)
.data
.align 3
HIDENAME(curbrk):
.llong CNAME(_end)
.text
ENTRY(sbrk)
addis %r5,%r2,HIDENAME(curbrk)@toc@ha
addi %r5,%r5,HIDENAME(curbrk)@toc@l
ld %r6,0(%r5) /* r6 = old break */
cmpdi %r3,0 /* sbrk(0) - return curbrk */
beq 1f
add %r3,%r3,%r6
mr %r7,%r3 /* r7 = new break */
li %r0,SYS_break
sc /* break(new_break) */
bso 2f
std %r7,0(%r5)
1:
mr %r3,%r6 /* set return value */
blr
2:
mflr %r0
std %r0,16(%r1)
stdu %r1,-48(%r1)
bl HIDENAME(cerror)
nop
ld %r1,0(%r1)
ld %r0,16(%r1)
mtlr %r0
blr
.section .note.GNU-stack,"",%progbits
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