1/* $OpenBSD: sbrk.S,v 1.8 2015/09/10 13:29:09 guenther Exp $ */ 2/* $NetBSD: sbrk.S,v 1.4 1996/10/17 03:08:20 cgd Exp $ */ 3 4/* 5 * Copyright (c) 1994, 1995 Carnegie-Mellon University. 6 * All rights reserved. 7 * 8 * Author: Chris G. Demetriou 9 * 10 * Permission to use, copy, modify and distribute this software and 11 * its documentation is hereby granted, provided that both the copyright 12 * notice and this permission notice appear in all copies of the 13 * software, derivative works or modified versions, and any portions 14 * thereof, and that both notices appear in supporting documentation. 15 * 16 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" 17 * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND 18 * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. 19 * 20 * Carnegie Mellon requests users of this software to return to 21 * 22 * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU 23 * School of Computer Science 24 * Carnegie Mellon University 25 * Pittsburgh PA 15213-3890 26 * 27 * any improvements or extensions that they make and grant Carnegie the 28 * rights to redistribute these changes. 29 */ 30 31#include "SYS.h" 32 33 .globl _end 34 35 .data 36EXPORT(__curbrk) 37 .quad _end 38 .size __curbrk, . - __curbrk 39 .type __curbrk,@object 40 41 .text 42 .weak sbrk 43LEAF(sbrk, 1) 44 br pv, L1 /* XXX profiling */ 45L1: LDGP(pv) 46 ldq a1, __curbrk 47 addq a0, a1, a0 48 CALLSYS_ERROR(break) 49 stq a0, __curbrk 50 mov a1, v0 51 RET 52END(sbrk) 53