1/* $NetBSD: brk.S,v 1.9 2020/05/10 14:34:31 skrll 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 1.9 2020/05/10 14:34:31 skrll Exp $") 35#endif /* LIBC_SCCS and not lint */ 36 37 .import __curbrk, data 38 .hidden __curbrk 39 .global _end 40 41#ifdef WEAK_ALIAS 42 WEAK_ALIAS(brk, _brk) 43#endif 44 45 .data 46 .export __minbrk, data 47 .hidden __minbrk 48__minbrk: 49 .long _end 50 51ENTRY(_brk,0) 52#ifdef __PIC__ 53 addil LT%__minbrk, %r19 54 ldw RT%__minbrk(%r1), %r1 55 ldw 0(%r1), %t2 56#else /* !__PIC__ */ 57 ldil L%__minbrk, %t1 58 ldw R%__minbrk(%t1), %t2 59#endif /* !__PIC__ */ 60 sub,<< %t2, %arg0, %r0 61 copy %t2, %arg0 62 stw %arg0, HPPA_FRAME_ARG(0)(%sp) 63 64 SYSCALL(break) 65 66 ldw HPPA_FRAME_ARG(0)(%sp), %arg0 67#ifdef __PIC__ 68 addil LT%__curbrk, %r19 69 ldw RT%__curbrk(%r1), %r1 70 bv %r0(%rp) 71 stw %arg0, 0(%r1) 72#else /* !__PIC__ */ 73 ldil L%__curbrk, %t1 74 bv %r0(%rp) 75 stw %arg0, R%__curbrk(%t1) 76#endif /* !__PIC__ */ 77EXIT(brk) 78 79 .end 80 81