1998-03-09 06:34:43 +00:00
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/* $NetBSD: sbrk.S,v 1.4 1996/10/17 03:08:20 cgd Exp $ */
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/*
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* Copyright (c) 1994, 1995 Carnegie-Mellon University.
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* All rights reserved.
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*
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* Author: Chris G. Demetriou
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*
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* Permission to use, copy, modify and distribute this software and
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* its documentation is hereby granted, provided that both the copyright
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* notice and this permission notice appear in all copies of the
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* software, derivative works or modified versions, and any portions
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* thereof, and that both notices appear in supporting documentation.
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*
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* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
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* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
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* FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
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*
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* Carnegie Mellon requests users of this software to return to
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*
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* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
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* School of Computer Science
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* Carnegie Mellon University
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* Pittsburgh PA 15213-3890
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*
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* any improvements or extensions that they make and grant Carnegie the
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* rights to redistribute these changes.
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*/
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2003-01-19 00:17:03 +00:00
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#include <machine/asm.h>
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__FBSDID("$FreeBSD$");
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1998-03-09 06:34:43 +00:00
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#include "SYS.h"
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.globl _end
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.data
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EXPORT(curbrk)
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.quad _end
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.text
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LEAF(sbrk, 1)
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br pv, L1 /* XXX profiling */
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L1: LDGP(pv)
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ldq a1, curbrk
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1999-06-26 15:22:33 +00:00
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beq a0, L2
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1998-03-09 06:34:43 +00:00
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addq a0, a1, a0
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CALLSYS_ERROR(break)
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stq a0, curbrk
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1999-06-26 15:22:33 +00:00
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L2:
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1998-03-09 06:34:43 +00:00
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mov a1, v0
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RET
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END(sbrk)
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