1/* $NetBSD: brk.S,v 1.6 2013/09/12 15:36:15 joerg Exp $ */ 2 3/* $OpenBSD: brk.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: brk.S,v 1.6 2013/09/12 15:36:15 joerg Exp $") 35#endif /* LIBC_SCCS and not lint */ 36 37 .import curbrk, data 38 .global _end 39 40#ifdef WEAK_ALIAS 41 WEAK_ALIAS(brk, _brk) 42#endif 43 44 .data 45 .export __minbrk, data 46__minbrk: 47 .long _end 48 49ENTRY(_brk,0) 50#ifdef __PIC__ 51 addil LT%__minbrk, %r19 52 ldw RT%__minbrk(%r1), %r1 53 ldw 0(%r1), %t2 54#else /* !__PIC__ */ 55 ldil L%__minbrk, %t1 56 ldw R%__minbrk(%t1), %t2 57#endif /* !__PIC__ */ 58 sub,<< %t2, %arg0, %r0 59 copy %t2, %arg0 60 stw %arg0, HPPA_FRAME_ARG(0)(%sp) 61 62 SYSCALL(break) 63 64 ldw HPPA_FRAME_ARG(0)(%sp), %arg0 65#ifdef __PIC__ 66 addil LT%curbrk, %r19 67 ldw RT%curbrk(%r1), %r1 68 bv %r0(%rp) 69 stw %arg0, 0(%r1) 70#else /* !__PIC__ */ 71 ldil L%curbrk, %t1 72 bv %r0(%rp) 73 stw %arg0, R%curbrk(%t1) 74#endif /* !__PIC__ */ 75EXIT(brk) 76 77 .end 78 79