1/* 2 * Copyright (c) 1983, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 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 34#if defined(SYSLIBC_SCCS) && !defined(lint) 35 /* .asciz "@(#)sbrk.s 8.1 (Berkeley) 6/4/93" */ 36 .asciz "$NetBSD: sbrk.S,v 1.9 2002/02/24 01:06:21 matt Exp $" 37#endif /* SYSLIBC_SCCS and not lint */ 38 39#include "SYS.h" 40 41 .globl _end 42 .globl _C_LABEL(__minbrk) 43 .globl CURBRK 44 45#ifdef WEAK_ALIAS 46WEAK_ALIAS(sbrk, _sbrk) 47#endif 48 49 .data 50_C_LABEL(__minbrk): 51 .long _end 52CURBRK: 53 .long _end 54 .text 55 56ENTRY(_sbrk, 0) 57 addl3 CURBRK,4(%ap),-(%sp) 58 pushl $1 59 movl %ap,%r3 60 movl %sp,%ap 61 chmk $ SYS_break 62 jcs err 63 movl CURBRK,%r0 64 addl2 4(%r3),CURBRK 65 ret 66err: 67 jmp CERROR+2 68