1/* $NetBSD: brk.S,v 1.2 2006/09/23 17:39:34 cherry 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 <machine/asm.h> 31/* __FBSDID("$FreeBSD: src/lib/libc/ia64/sys/brk.S,v 1.4 2003/05/16 21:26:39 marcel Exp $"); */ 32 33#include "SYS.h" 34 35 .globl _end 36IMPORT(__curbrk, 8) 37 38 .data 39EXPORT(__minbrk) 40 .quad _end 41 42 .text 43ENTRY(_brk, 1) 44 add r14=@ltoff(__minbrk),gp ;; 45 ld8 r14=[r14] ;; 46 ld8 r14=[r14] ;; 47 cmp.ltu p6,p0=r32,r14 ;; 48(p6) mov r32=r14 ;; 49 st8 [sp]=r32 50 CALLSYS_ERROR(break) 51 ld8 r15=[sp] 52 add r14=@ltoff(__curbrk),gp ;; 53 ld8 r14=[r14] ;; 54 st8 [r14]=r15 55 mov ret0=0 56 br.ret.sptk.few rp 57END(_brk) 58