sbrk.S revision 84755
1/* $FreeBSD: head/lib/libc/ia64/sys/sbrk.S 84755 2001-10-10 10:35:01Z dfr $ */ 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 39 .text 40ENTRY(sbrk, 1) 41 alloc r14=ar.pfs,1,2,0,0 42 43 add loc0=@ltoff(curbrk),gp ;; 44 ld8 loc0=[loc0] ;; 45 ld8 loc1=[loc0] 46 cmp.eq p6,p0=in0,r0 47(p6) br.dpnt.few 1f 48 add in0=r14,in0 49 CALLSYS_ERROR(break) 50 st8 [loc0]=in0 511: mov ret0=loc1 52 br.ret.sptk.few rp 53END(sbrk) 54