1/* $NetBSD: sbrk.S,v 1.3 2003/10/06 05:30:21 matt Exp $ */ 2 3/* $OpenBSD: sbrk.S,v 1.7 2001/06/04 23:14:04 mickey Exp $ */ 4 5/* 6 * Copyright (c) 1999 Michael Shalayeff 7 * All rights reserved. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 3. All advertising materials mentioning features or use of this software 18 * must display the following acknowledgement: 19 * This product includes software developed by Michael Shalayeff. 20 * 4. The name of the author may not be used to endorse or promote products 21 * derived from this software without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 24 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 25 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 26 * IN NO EVENT SHALL THE AUTHOR OR HIS RELATIVES BE LIABLE FOR ANY DIRECT, 27 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 28 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 29 * SERVICES; LOSS OF MIND, USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 31 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 32 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 33 * THE POSSIBILITY OF SUCH DAMAGE. 34 */ 35 36#include "SYS.h" 37 38#if defined(LIBC_SCCS) && !defined(lint) 39 RCSID("$NetBSD: sbrk.S,v 1.3 2003/10/06 05:30:21 matt Exp $") 40#endif /* LIBC_SCCS and not lint */ 41 42 .import end, data 43 44#ifdef WEAK_ALIAS 45 WEAK_ALIAS(sbrk, _sbrk) 46#endif 47 48 .data 49 .export curbrk, data 50curbrk: 51 .long end 52 53ENTRY(_sbrk,0) 54#ifdef PIC 55 addil LT%curbrk, %r19 56 ldw RT%curbrk(%r1), %r1 57 ldw 0(%r1), %t2 58#else /* !PIC */ 59 ldil L%curbrk, %t1 60 ldw R%curbrk(%t1), %t2 61#endif /* !PIC */ 62 add %arg0, %t2, %arg0 63 stw %arg0, HPPA_FRAME_ARG(0)(%sp) 64 65 SYSCALL(break) 66 67#ifdef PIC 68 addil LT%curbrk, %r19 69 ldw RT%curbrk(%r1), %r1 70#else /* !PIC */ 71 ldil L%curbrk, %t1 72 ldo R%curbrk(%t1), %r1 73#endif /* !PIC */ 74 ldw 0(%r1), %ret0 75 ldw HPPA_FRAME_ARG(0)(%sp), %arg0 76 bv %r0(%rp) 77 stw %arg0, 0(%r1) 78 79EXIT(sbrk) 80 81 .end 82