72 lines
2.5 KiB
ArmAsm
72 lines
2.5 KiB
ArmAsm
/*
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* Copyright (c) 1992, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This software was developed by the Computer Systems Engineering group
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* at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and
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* contributed to Berkeley.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* from: Header: brk.s,v 1.3 92/06/25 12:56:05 mccanne Exp
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*/
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#if defined(SYSLIBC_SCCS) && !defined(lint)
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.asciz "@(#)sbrk.s 8.1 (Berkeley) 6/4/93"
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#if 0
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RCSID("$NetBSD: sbrk.S,v 1.7 2000/07/25 15:14:46 mycroft Exp $")
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#endif
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#endif /* SYSLIBC_SCCS and not lint */
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#include <machine/asm.h>
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__FBSDID("$FreeBSD$");
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#include "SYS.h"
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.data
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.globl HIDENAME(curbrk)
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.globl HIDENAME(minbrk)
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.type HIDENAME(curbrk),@object
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.type HIDENAME(minbrk),@object
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.align 8
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HIDENAME(curbrk):
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.xword CNAME(_end)
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HIDENAME(minbrk):
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.xword CNAME(_end)
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_SYSENTRY(sbrk)
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PIC_PROLOGUE(%o3, %o2)
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SET(HIDENAME(curbrk), %o2, %o3)
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ldx [%o3], %o4
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add %o4, %o0, %o5
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mov %o5, %o0
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mov SYS_break, %g1
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ta %xcc, ST_SYSCALL
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bcc,a,pt %xcc, 1f
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mov %o4, %o0
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ERROR()
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1: retl
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stx %o5, [%o3]
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_SYSEND(sbrk)
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