1/* 2 * Copyright (c) 1992, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * This software was developed by the Computer Systems Engineering group 6 * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and 7 * contributed to Berkeley. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * from: Header: brk.s,v 1.3 92/06/25 12:56:05 mccanne Exp 34 */ 35 36#if defined(SYSLIBC_SCCS) && !defined(lint) 37 .asciz "@(#)sbrk.s 8.1 (Berkeley) 6/4/93" 38#if 0 39 RCSID("$NetBSD: sbrk.S,v 1.7 2000/07/25 15:14:46 mycroft Exp $") 40#endif 41#endif /* SYSLIBC_SCCS and not lint */ 42#include <machine/asm.h> 43__FBSDID("$FreeBSD$"); 44 45#include "SYS.h" 46 47 .data 48 .globl HIDENAME(curbrk) 49 .globl HIDENAME(minbrk) 50 .type HIDENAME(curbrk),@object 51 .type HIDENAME(minbrk),@object 52 .align 8 53HIDENAME(curbrk): 54 .xword CNAME(_end) 55HIDENAME(minbrk): 56 .xword CNAME(_end) 57 58_SYSENTRY(sbrk) 59 PIC_PROLOGUE(%o3, %o2) 60 SET(HIDENAME(curbrk), %o2, %o3) 61 ldx [%o3], %o4 62 add %o4, %o0, %o5 63 mov %o5, %o0 64 mov SYS_break, %g1 65 ta %xcc, ST_SYSCALL 66 bcc,a,pt %xcc, 1f 67 mov %o4, %o0 68 ERROR() 691: retl 70 stx %o5, [%o3] 71_SYSEND(sbrk) 72