1/* $NetBSD: sbrk.S,v 1.5 1999/01/14 22:48:19 kleink Exp $ */ 2 3/* 4 * Copyright (c) 1994, 1995 Carnegie-Mellon University. 5 * All rights reserved. 6 * 7 * Author: Chris G. Demetriou 8 * 9 * Permission to use, copy, modify and distribute this software and 10 * its documentation is hereby granted, provided that both the copyright 11 * notice and this permission notice appear in all copies of the 12 * software, derivative works or modified versions, and any portions 13 * thereof, and that both notices appear in supporting documentation. 14 * 15 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" 16 * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND 17 * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. 18 * 19 * Carnegie Mellon requests users of this software to return to 20 * 21 * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU 22 * School of Computer Science 23 * Carnegie Mellon University 24 * Pittsburgh PA 15213-3890 25 * 26 * any improvements or extensions that they make and grant Carnegie the 27 * rights to redistribute these changes. 28 */ 29 30#include "SYS.h" 31 32 .globl _end 33 34 .data 35EXPORT(__curbrk) 36 .quad _end 37 38 .text 39LEAF(sbrk, 1) 40 br pv, L1 /* XXX profiling */ 41L1: LDGP(pv) 42 ldq a1, __curbrk 43 addq a0, a1, a0 44 CALLSYS_ERROR(break) 45 stq a0, __curbrk 46 mov a1, v0 47 RET 48END(sbrk) 49