1/* $NetBSD: sbrk.S,v 1.8 2020/05/10 14:34:31 skrll 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 * 18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 19 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 20 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 21 * IN NO EVENT SHALL THE AUTHOR OR HIS RELATIVES BE LIABLE FOR ANY DIRECT, 22 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 23 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 24 * SERVICES; LOSS OF MIND, USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 26 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 27 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 28 * THE POSSIBILITY OF SUCH DAMAGE. 29 */ 30 31#include "SYS.h" 32 33#if defined(LIBC_SCCS) && !defined(lint) 34 RCSID("$NetBSD: sbrk.S,v 1.8 2020/05/10 14:34:31 skrll Exp $") 35#endif /* LIBC_SCCS and not lint */ 36 37 .global _end 38 39#ifdef WEAK_ALIAS 40 WEAK_ALIAS(sbrk, _sbrk) 41#endif 42 43 .data 44 .export __curbrk, data 45 .hidden __curbrk 46__curbrk: 47 .long _end 48 49ENTRY(_sbrk,0) 50#ifdef __PIC__ 51 addil LT%__curbrk, %r19 52 ldw RT%__curbrk(%r1), %r1 53 ldw 0(%r1), %t2 54#else /* !__PIC__ */ 55 ldil L%__curbrk, %t1 56 ldw R%__curbrk(%t1), %t2 57#endif /* !__PIC__ */ 58 add %arg0, %t2, %arg0 59 stw %arg0, HPPA_FRAME_ARG(0)(%sp) 60 61 SYSCALL(break) 62 63#ifdef __PIC__ 64 addil LT%__curbrk, %r19 65 ldw RT%__curbrk(%r1), %r1 66#else /* !__PIC__ */ 67 ldil L%__curbrk, %t1 68 ldo R%__curbrk(%t1), %r1 69#endif /* !__PIC__ */ 70 ldw 0(%r1), %ret0 71 ldw HPPA_FRAME_ARG(0)(%sp), %arg0 72 bv %r0(%rp) 73 stw %arg0, 0(%r1) 74 75EXIT(sbrk) 76 77 .end 78