1*fc31befaSmiod/* $OpenBSD: sbrk.S,v 1.10 2024/03/27 20:03:29 miod Exp $ */ 2cf252584Smiod/* $NetBSD: sbrk.S,v 1.9 2006/01/06 03:58:31 uwe Exp $ */ 3cf252584Smiod 4cf252584Smiod/*- 5cf252584Smiod * Copyright (c) 1990 The Regents of the University of California. 6cf252584Smiod * All rights reserved. 7cf252584Smiod * 8cf252584Smiod * This code is derived from software contributed to Berkeley by 9cf252584Smiod * William Jolitz. 10cf252584Smiod * 11cf252584Smiod * Redistribution and use in source and binary forms, with or without 12cf252584Smiod * modification, are permitted provided that the following conditions 13cf252584Smiod * are met: 14cf252584Smiod * 1. Redistributions of source code must retain the above copyright 15cf252584Smiod * notice, this list of conditions and the following disclaimer. 16cf252584Smiod * 2. Redistributions in binary form must reproduce the above copyright 17cf252584Smiod * notice, this list of conditions and the following disclaimer in the 18cf252584Smiod * documentation and/or other materials provided with the distribution. 19cf252584Smiod * 3. Neither the name of the University nor the names of its contributors 20cf252584Smiod * may be used to endorse or promote products derived from this software 21cf252584Smiod * without specific prior written permission. 22cf252584Smiod * 23cf252584Smiod * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24cf252584Smiod * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25cf252584Smiod * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26cf252584Smiod * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27cf252584Smiod * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28cf252584Smiod * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29cf252584Smiod * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30cf252584Smiod * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31cf252584Smiod * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32cf252584Smiod * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33cf252584Smiod * SUCH DAMAGE. 34cf252584Smiod * 35cf252584Smiod * from: @(#)sbrk.s 5.1 (Berkeley) 4/23/90 36cf252584Smiod */ 37cf252584Smiod 38cf252584Smiod#include "SYS.h" 39cf252584Smiod 400ee2ce67Sguenther .globl _end 41b3b7ef2eSguenther .globl __curbrk 42b3b7ef2eSguenther .hidden __curbrk 43cf252584Smiod 443f373d41Sguenther .weak sbrk 45cf252584Smiod 46cf252584Smiod .data 47b3b7ef2eSguenther__curbrk: 480ee2ce67Sguenther .long _end 493f373d41Sguenther .size __curbrk, . - __curbrk 503f373d41Sguenther .type __curbrk,@object 513f373d41Sguenther 52cf252584Smiod .text 53cf252584Smiod 543f373d41SguentherENTRY(sbrk) 55cf252584Smiod mov r4, r2 5632b97dedSpascal#ifdef __PIC__ 57cf252584Smiod mova L_GOT, r0 58cf252584Smiod mov.l L_GOT, r3 59cf252584Smiod add r0, r3 60cf252584Smiod mov.l Lcurbrk, r0 61cf252584Smiod mov.l @(r0, r3), r0 62cf252584Smiod#else 63cf252584Smiod mov.l Lcurbrk, r0 64cf252584Smiod#endif 65cf252584Smiod mov.l @r0, r0 66cf252584Smiod add r0, r4 67*fc31befaSmiod systrap SYS_break 683f373d41Sguenther bf 1f 6932b97dedSpascal#ifdef __PIC__ 70cf252584Smiod mov.l Lcurbrk, r0 71cf252584Smiod mov.l @(r0, r3), r1 72cf252584Smiod#else 73cf252584Smiod mov.l Lcurbrk, r1 74cf252584Smiod#endif 75cf252584Smiod mov.l @r1, r0 76cf252584Smiod add r0, r2 77cf252584Smiod rts 78cf252584Smiod mov.l r2, @r1 793f373d41Sguenther1: 80*fc31befaSmiod SET_ERRNO_AND_RETURN(break) 81cf252584Smiod 82cf252584Smiod .align 2 83*fc31befaSmiod systrap_data SYS_break 8432b97dedSpascal#ifdef __PIC__ 85cf252584SmiodL_GOT: .long _GLOBAL_OFFSET_TABLE_ 86b3b7ef2eSguentherLcurbrk: .long __curbrk@GOT 87cf252584Smiod#else 88b3b7ef2eSguentherLcurbrk: .long __curbrk 89cf252584Smiod#endif 903f373d41Sguenther SET_ENTRY_SIZE(sbrk) 91