1ce0bb6e8Sragge/* 2ce0bb6e8Sragge * Copyright (c) 1983, 1993 3ce0bb6e8Sragge * The Regents of the University of California. All rights reserved. 4ce0bb6e8Sragge * 5ce0bb6e8Sragge * Redistribution and use in source and binary forms, with or without 6ce0bb6e8Sragge * modification, are permitted provided that the following conditions 7ce0bb6e8Sragge * are met: 8ce0bb6e8Sragge * 1. Redistributions of source code must retain the above copyright 9ce0bb6e8Sragge * notice, this list of conditions and the following disclaimer. 10ce0bb6e8Sragge * 2. Redistributions in binary form must reproduce the above copyright 11ce0bb6e8Sragge * notice, this list of conditions and the following disclaimer in the 12ce0bb6e8Sragge * documentation and/or other materials provided with the distribution. 13eb7c1594Sagc * 3. Neither the name of the University nor the names of its contributors 14ce0bb6e8Sragge * may be used to endorse or promote products derived from this software 15ce0bb6e8Sragge * without specific prior written permission. 16ce0bb6e8Sragge * 17ce0bb6e8Sragge * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18ce0bb6e8Sragge * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19ce0bb6e8Sragge * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20ce0bb6e8Sragge * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21ce0bb6e8Sragge * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22ce0bb6e8Sragge * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23ce0bb6e8Sragge * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24ce0bb6e8Sragge * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25ce0bb6e8Sragge * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26ce0bb6e8Sragge * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27ce0bb6e8Sragge * SUCH DAMAGE. 28ce0bb6e8Sragge */ 29ce0bb6e8Sragge 30787e823fSmatt#include "SYS.h" 31787e823fSmatt 32ce0bb6e8Sragge#if defined(SYSLIBC_SCCS) && !defined(lint) 33ce0bb6e8Sragge /* .asciz "@(#)brk.s 8.1 (Berkeley) 6/4/93" */ 34*6cb10275SriastradhRCSID("$NetBSD: brk.S,v 1.15 2014/03/18 18:20:37 riastradh Exp $") 35ce0bb6e8Sragge#endif /* SYSLIBC_SCCS and not lint */ 36ce0bb6e8Sragge 379bc4e223Smatt .globl _C_LABEL(__curbrk) 38ae4364e1Smatt .globl _C_LABEL(__minbrk) 399bc4e223Smatt .hidden _C_LABEL(__curbrk) 409bc4e223Smatt .hidden _C_LABEL(__minbrk) 41ce0bb6e8Sragge 4203f996bdSkleink#ifdef WEAK_ALIAS 4303f996bdSkleinkWEAK_ALIAS(brk, _brk) 4403f996bdSkleink#endif 45c3530f0cSmatt 46c3530f0cSmattENTRY(_brk, 0) 479bc4e223Smatt moval _C_LABEL(__minbrk),%r5 # gtr > _end 489bc4e223Smatt cmpl (%r5),4(%ap) # gtr > _end 49269c3e3dSmartin blequ 1f # is fine 509bc4e223Smatt movl (%r5),4(%ap) # shrink back to _end 517661e75aSmatt1: chmk $ SYS_break # do it 52ce0bb6e8Sragge jcs err 539bc4e223Smatt movl 4(%ap),_C_LABEL(__curbrk) 540ce5ca14Smatt clrl %r0 55ce0bb6e8Sragge ret 56ce0bb6e8Sraggeerr: 57c3530f0cSmatt jmp CERROR+2 58787e823fSmattEND(_brk) 59