12fe8fb19SBen Gras/* 22fe8fb19SBen Gras * Copyright (c) 1983, 1993 32fe8fb19SBen Gras * The Regents of the University of California. All rights reserved. 42fe8fb19SBen Gras * 52fe8fb19SBen Gras * Redistribution and use in source and binary forms, with or without 62fe8fb19SBen Gras * modification, are permitted provided that the following conditions 72fe8fb19SBen Gras * are met: 82fe8fb19SBen Gras * 1. Redistributions of source code must retain the above copyright 92fe8fb19SBen Gras * notice, this list of conditions and the following disclaimer. 102fe8fb19SBen Gras * 2. Redistributions in binary form must reproduce the above copyright 112fe8fb19SBen Gras * notice, this list of conditions and the following disclaimer in the 122fe8fb19SBen Gras * documentation and/or other materials provided with the distribution. 132fe8fb19SBen Gras * 3. Neither the name of the University nor the names of its contributors 142fe8fb19SBen Gras * may be used to endorse or promote products derived from this software 152fe8fb19SBen Gras * without specific prior written permission. 162fe8fb19SBen Gras * 172fe8fb19SBen Gras * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 182fe8fb19SBen Gras * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 192fe8fb19SBen Gras * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 202fe8fb19SBen Gras * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 212fe8fb19SBen Gras * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 222fe8fb19SBen Gras * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 232fe8fb19SBen Gras * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 242fe8fb19SBen Gras * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 252fe8fb19SBen Gras * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 262fe8fb19SBen Gras * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 272fe8fb19SBen Gras * SUCH DAMAGE. 282fe8fb19SBen Gras */ 292fe8fb19SBen Gras 30e415d488SLionel Sambuc#include "SYS.h" 31e415d488SLionel Sambuc 322fe8fb19SBen Gras#if defined(SYSLIBC_SCCS) && !defined(lint) 332fe8fb19SBen Gras /* .asciz "@(#)brk.s 8.1 (Berkeley) 6/4/93" */ 34*0a6a1f1dSLionel SambucRCSID("$NetBSD: brk.S,v 1.15 2014/03/18 18:20:37 riastradh Exp $") 352fe8fb19SBen Gras#endif /* SYSLIBC_SCCS and not lint */ 362fe8fb19SBen Gras 3784d9c625SLionel Sambuc .globl _C_LABEL(__curbrk) 382fe8fb19SBen Gras .globl _C_LABEL(__minbrk) 3984d9c625SLionel Sambuc .hidden _C_LABEL(__curbrk) 4084d9c625SLionel Sambuc .hidden _C_LABEL(__minbrk) 412fe8fb19SBen Gras 422fe8fb19SBen Gras#ifdef WEAK_ALIAS 432fe8fb19SBen GrasWEAK_ALIAS(brk, _brk) 442fe8fb19SBen Gras#endif 452fe8fb19SBen Gras 462fe8fb19SBen GrasENTRY(_brk, 0) 4784d9c625SLionel Sambuc moval _C_LABEL(__minbrk),%r5 # gtr > _end 4884d9c625SLionel Sambuc cmpl (%r5),4(%ap) # gtr > _end 492fe8fb19SBen Gras blequ 1f # is fine 5084d9c625SLionel Sambuc movl (%r5),4(%ap) # shrink back to _end 512fe8fb19SBen Gras1: chmk $ SYS_break # do it 522fe8fb19SBen Gras jcs err 5384d9c625SLionel Sambuc movl 4(%ap),_C_LABEL(__curbrk) 542fe8fb19SBen Gras clrl %r0 552fe8fb19SBen Gras ret 562fe8fb19SBen Graserr: 572fe8fb19SBen Gras jmp CERROR+2 58e415d488SLionel SambucEND(_brk) 59