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/* $OpenBSD: brk.S,v 1.5 2003/01/07 22:01:35 miod Exp $ */
/*-
* Copyright (c) 1990 The Regents of the University of California.
* All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* the Systems Programming Group of the University of Utah Computer
* Science Department.
*
* 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.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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.
*/
#if defined(LIBC_SCCS)
.data
.string "$OpenBSD: brk.S,v 1.5 2003/01/07 22:01:35 miod Exp $"
#endif /* LIBC_SCCS */
#include "SYS.h"
.globl _end
.globl minbrk
.globl __curbrk
.data
.align 8
minbrk: .long _end
.text
ENTRY(brk)
or.u r5,r0,hi16(minbrk)
ld r5,r5,lo16(minbrk)
cmp r3,r5,r2
bb1 le,r3,1f /* r2 should be > minbrk; can't go below end */
or r2,r5,0 /* otherwise, set r2 to minbrk */
1:
or r4,r2,0
or r13,r0,SYS_break
tb0 0,r0,128
br __cerror
or.u r5,r0,hi16(__curbrk)
st r4,r5,lo16(__curbrk)
or r2,r0,0 /* clear r2/r3 to indicate success */
jmp.n r1
or r3,r0,0
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