NetBSD/lib/libc/arch/sh3/sys/brk.S

85 lines
2.6 KiB
ArmAsm

/* $NetBSD: brk.S,v 1.1 2000/01/05 14:07:40 msaitoh Exp $ */
/*-
* Copyright (c) 1990 The Regents of the University of California.
* All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* William Jolitz.
*
* 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.
*
* from: @(#)brk.s 5.2 (Berkeley) 12/17/90
*/
#include <machine/asm.h>
#if defined(SYSLIBC_SCCS) && !defined(lint)
RCSID("$NetBSD: brk.S,v 1.1 2000/01/05 14:07:40 msaitoh Exp $")
#endif /* SYSLIBC_SCCS and not lint */
#include "SYS.h"
.globl _end
.globl curbrk
.data
.globl minbrk
.align 2
minbrk: .long _end
.text
ENTRY(brk)
mov.l Lminbrk, r0
mov.l @r0, r0
cmp/hs r4, r0
bf 1f
mov r0, r4
1:
mov.l LSYS_break, r0
trapa #0x80
bf err
xor r0, r0
mov.l Lcurbrk, r1
mov.l r4, @r1
rts
nop
err:
mov.l Lcerror, r1
jmp @r1
nop
.align 2
Lminbrk: .long minbrk
LSYS_break: .long SYS_break
Lcurbrk: .long curbrk
Lcerror: .long cerror