| Current Path : /usr/src/lib/libc/powerpc64/sys/ |
FreeBSD hs32.drive.ne.jp 9.1-RELEASE FreeBSD 9.1-RELEASE #1: Wed Jan 14 12:18:08 JST 2015 root@hs32.drive.ne.jp:/sys/amd64/compile/hs32 amd64 |
| Current File : //usr/src/lib/libc/powerpc64/sys/brk.S |
/*-
* 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: brk.S,v 1.9 2000/06/26 06:25:43 kleink Exp $ */
#include <machine/asm.h>
__FBSDID("$FreeBSD: release/9.1.0/lib/libc/powerpc64/sys/brk.S 218824 2011-02-18 21:44:53Z nwhitehorn $");
#include "SYS.h"
.globl HIDENAME(curbrk)
.globl HIDENAME(minbrk)
.globl CNAME(_end)
.data
.align 3
HIDENAME(minbrk):
.llong CNAME(_end)
.text
ENTRY(brk)
addis %r6,%r2,HIDENAME(minbrk)@toc@ha
ld %r6,HIDENAME(minbrk)@toc@l(%r6)
cmpld %r6,%r3 /* if (minbrk <= r3) */
bgt 0f
mr %r6,%r3 /* r6 = r3 */
0:
mr %r3,%r6 /* new break value */
li %r0,SYS_break
sc /* assume, that r5 is kept */
bso 1f
/* record new break */
addis %r7,%r2,HIDENAME(curbrk)@toc@ha
std %r6,HIDENAME(curbrk)@toc@l(%r7)
blr /* return 0 */
1:
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