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. Neither the name of the University nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 */ 29 30#include "SYS.h" 31 32#if defined(SYSLIBC_SCCS) && !defined(lint) 33 /* .asciz "@(#)sbrk.s 8.1 (Berkeley) 6/4/93" */ 34RCSID("$NetBSD: sbrk.S,v 1.12 2013/07/18 12:27:01 matt Exp $") 35#endif /* SYSLIBC_SCCS and not lint */ 36 37 .globl _end 38 .globl _C_LABEL(__minbrk) 39 .globl _C_LABEL(__curbrk) 40 .hidden _C_LABEL(__minbrk) 41 .hidden _C_LABEL(__curbrk) 42 43#ifdef WEAK_ALIAS 44WEAK_ALIAS(sbrk, _sbrk) 45#endif 46 47 .data 48_C_LABEL(__minbrk): 49 .long _end 50_C_LABEL(__curbrk): 51 .long _end 52 .text 53 54ENTRY(_sbrk, 0) 55 moval _C_LABEL(__curbrk),%r5 56 addl3 (%r5),4(%ap),-(%sp) 57 pushl $1 58 movl %ap,%r3 59 movl %sp,%ap 60 chmk $ SYS_break 61 jcs err 62 movl (%r5),%r0 63 addl2 4(%r3),(%r5) 64 ret 65err: 66 jmp CERROR+2 67END(_sbrk) 68