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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
HIDENAME(curbrk):
.long CNAME(_end)
.text
ENTRY(sbrk)
#ifdef PIC
mflr %r10
bl _GLOBAL_OFFSET_TABLE_@local-4
mflr %r5
mtlr %r10
lwz %r5,HIDENAME(curbrk)@got(%r5)
lwz %r6,0(%r5)
#else
lis %r5,HIDENAME(curbrk)@ha
lwz %r6,HIDENAME(curbrk)@l(%r5) /* r6 = old break */
#endif
cmpwi %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
#ifdef PIC
stw %r7,0(%r5)
#else
stw %r7,HIDENAME(curbrk)@l(%r5) /* record new break */
#endif
1:
mr %r3,%r6 /* set return value */
blr
2:
b PIC_PLT(HIDENAME(cerror))
.section .note.GNU-stack,"",%progbits
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