1/* $OpenBSD: sbrk.S,v 1.17 2016/05/30 05:18:52 guenther Exp $ */ 2 3/* 4 * Copyright (c) 1999 Michael Shalayeff 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 19 * IN NO EVENT SHALL THE AUTHOR OR HIS RELATIVES BE LIABLE FOR ANY DIRECT, 20 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 21 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 22 * SERVICES; LOSS OF MIND, USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 24 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 25 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 26 * THE POSSIBILITY OF SUCH DAMAGE. 27 */ 28 29#include "SYS.h" 30 31 .import _end, data 32 33 .data 34 .export __curbrk, data 35__curbrk 36 .long _end 37 38 .weak sbrk 39 40LEAF_ENTRY(sbrk) 41#ifdef __PIC__ 42 addil LT%__curbrk, r19 43 ldw RT%__curbrk(r1), t1 44 ldw 0(t1), t2 45#else 46 ldil L%__curbrk, t1 47 ldw R%__curbrk(t1), t2 48#endif 49 add arg0, t2, arg0 50 stw arg0, HPPA_FRAME_ARG(0)(sp) 51 52 SYSCALL(break) 53 54#ifdef __PIC__ 55 addil LT%__curbrk, r19 56 ldw RT%__curbrk(r1), t1 57#else 58 ldil L%__curbrk, t1 59 ldo R%__curbrk(t1), t1 60#endif 61 ldw HPPA_FRAME_ARG(0)(sp), arg0 62 ldw 0(t1), ret0 63 bv r0(rp) 64 stw arg0, 0(t1) 65 66EXIT(sbrk) 67 68 .end 69 70