1*84d9c625SLionel Sambuc/* $NetBSD: brk.S,v 1.19 2013/09/12 15:36:15 joerg Exp $ */ 22fe8fb19SBen Gras 32fe8fb19SBen Gras/*- 42fe8fb19SBen Gras * Copyright (c) 1990 The Regents of the University of California. 52fe8fb19SBen Gras * All rights reserved. 62fe8fb19SBen Gras * 72fe8fb19SBen Gras * This code is derived from software contributed to Berkeley by 82fe8fb19SBen Gras * the Systems Programming Group of the University of Utah Computer 92fe8fb19SBen Gras * Science Department. 102fe8fb19SBen Gras * 112fe8fb19SBen Gras * Redistribution and use in source and binary forms, with or without 122fe8fb19SBen Gras * modification, are permitted provided that the following conditions 132fe8fb19SBen Gras * are met: 142fe8fb19SBen Gras * 1. Redistributions of source code must retain the above copyright 152fe8fb19SBen Gras * notice, this list of conditions and the following disclaimer. 162fe8fb19SBen Gras * 2. Redistributions in binary form must reproduce the above copyright 172fe8fb19SBen Gras * notice, this list of conditions and the following disclaimer in the 182fe8fb19SBen Gras * documentation and/or other materials provided with the distribution. 192fe8fb19SBen Gras * 3. Neither the name of the University nor the names of its contributors 202fe8fb19SBen Gras * may be used to endorse or promote products derived from this software 212fe8fb19SBen Gras * without specific prior written permission. 222fe8fb19SBen Gras * 232fe8fb19SBen Gras * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 242fe8fb19SBen Gras * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 252fe8fb19SBen Gras * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 262fe8fb19SBen Gras * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 272fe8fb19SBen Gras * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 282fe8fb19SBen Gras * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 292fe8fb19SBen Gras * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 302fe8fb19SBen Gras * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 312fe8fb19SBen Gras * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 322fe8fb19SBen Gras * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 332fe8fb19SBen Gras * SUCH DAMAGE. 342fe8fb19SBen Gras */ 352fe8fb19SBen Gras 362fe8fb19SBen Gras#include "SYS.h" 372fe8fb19SBen Gras 382fe8fb19SBen Gras#if defined(LIBC_SCCS) && !defined(lint) 392fe8fb19SBen Gras#if 0 402fe8fb19SBen Gras RCSID("from: @(#)brk.s 5.1 (Berkeley) 5/12/90") 412fe8fb19SBen Gras#else 42*84d9c625SLionel Sambuc RCSID("$NetBSD: brk.S,v 1.19 2013/09/12 15:36:15 joerg Exp $") 432fe8fb19SBen Gras#endif 442fe8fb19SBen Gras#endif /* LIBC_SCCS and not lint */ 452fe8fb19SBen Gras 462fe8fb19SBen Gras .globl _end 472fe8fb19SBen Gras .globl _C_LABEL(__minbrk) 48*84d9c625SLionel Sambuc .hidden _C_LABEL(__minbrk) 49*84d9c625SLionel Sambuc .globl _C_LABEL(__curbrk) 50*84d9c625SLionel Sambuc .hidden _C_LABEL(__curbrk) 512fe8fb19SBen Gras 522fe8fb19SBen Gras#ifdef WEAK_ALIAS 532fe8fb19SBen GrasWEAK_ALIAS(brk, _brk) 542fe8fb19SBen Gras#endif 552fe8fb19SBen Gras 562fe8fb19SBen Gras .data 572fe8fb19SBen Gras_C_LABEL(__minbrk): 582fe8fb19SBen Gras .long _end 592fe8fb19SBen Gras 602fe8fb19SBen Gras .text 612fe8fb19SBen Gras 622fe8fb19SBen GrasENTRY(_brk) 63*84d9c625SLionel Sambuc#ifdef __PIC__ 64*84d9c625SLionel Sambuc LEA_LCL(_C_LABEL(__minbrk),%a1) 65*84d9c625SLionel Sambuc movl (%a1),%a1 662fe8fb19SBen Gras#else 67*84d9c625SLionel Sambuc movl _C_LABEL(__minbrk),%a1 682fe8fb19SBen Gras#endif 69*84d9c625SLionel Sambuc cmpl 4(%sp),%a1 702fe8fb19SBen Gras jls ok 71*84d9c625SLionel Sambuc movl %a1,4(%sp) 722fe8fb19SBen Grasok: 73*84d9c625SLionel Sambuc SYSTRAP(break) 74*84d9c625SLionel Sambuc jcs CERROR 75*84d9c625SLionel Sambuc#ifdef __PIC__ 76*84d9c625SLionel Sambuc LEA_LCL(_C_LABEL(__curbrk),%a0) 77*84d9c625SLionel Sambuc movl %a1,(%a0) 782fe8fb19SBen Gras#else 79*84d9c625SLionel Sambuc movl %a1,_C_LABEL(__curbrk) 802fe8fb19SBen Gras#endif 812fe8fb19SBen Gras clrl %d0 822fe8fb19SBen Gras rts 83*84d9c625SLionel SambucEND(_brk) 84