brk.S revision 1.6
1 1.6 thorpej /* $NetBSD: brk.S,v 1.6 1998/07/01 06:44:15 thorpej Exp $ */ 2 1.5 thorpej 3 1.1 paulus /*- 4 1.1 paulus * Copyright (c) 1990 The Regents of the University of California. 5 1.1 paulus * All rights reserved. 6 1.1 paulus * 7 1.1 paulus * This code is derived from software contributed to Berkeley by 8 1.1 paulus * the Systems Programming Group of the University of Utah Computer 9 1.1 paulus * Science Department. 10 1.1 paulus * 11 1.1 paulus * Redistribution and use in source and binary forms, with or without 12 1.1 paulus * modification, are permitted provided that the following conditions 13 1.1 paulus * are met: 14 1.1 paulus * 1. Redistributions of source code must retain the above copyright 15 1.1 paulus * notice, this list of conditions and the following disclaimer. 16 1.1 paulus * 2. Redistributions in binary form must reproduce the above copyright 17 1.1 paulus * notice, this list of conditions and the following disclaimer in the 18 1.1 paulus * documentation and/or other materials provided with the distribution. 19 1.1 paulus * 3. All advertising materials mentioning features or use of this software 20 1.1 paulus * must display the following acknowledgement: 21 1.1 paulus * This product includes software developed by the University of 22 1.1 paulus * California, Berkeley and its contributors. 23 1.1 paulus * 4. Neither the name of the University nor the names of its contributors 24 1.1 paulus * may be used to endorse or promote products derived from this software 25 1.1 paulus * without specific prior written permission. 26 1.1 paulus * 27 1.1 paulus * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 28 1.1 paulus * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 29 1.1 paulus * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 30 1.1 paulus * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 31 1.1 paulus * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 32 1.1 paulus * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 33 1.1 paulus * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 34 1.1 paulus * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 35 1.1 paulus * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 36 1.1 paulus * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 37 1.1 paulus * SUCH DAMAGE. 38 1.1 paulus */ 39 1.1 paulus 40 1.5 thorpej #include "SYS.h" 41 1.5 thorpej 42 1.1 paulus #if defined(LIBC_SCCS) && !defined(lint) 43 1.5 thorpej #if 0 44 1.5 thorpej RCSID("from: @(#)brk.s 5.1 (Berkeley) 5/12/90") 45 1.5 thorpej #else 46 1.6 thorpej RCSID("$NetBSD: brk.S,v 1.6 1998/07/01 06:44:15 thorpej Exp $") 47 1.5 thorpej #endif 48 1.1 paulus #endif /* LIBC_SCCS and not lint */ 49 1.1 paulus 50 1.6 thorpej .globl _C_LABEL(end) 51 1.3 mycroft .globl minbrk 52 1.1 paulus .globl curbrk 53 1.3 mycroft 54 1.3 mycroft .data 55 1.6 thorpej minbrk: .long _C_LABEL(end) 56 1.3 mycroft .text 57 1.3 mycroft 58 1.1 paulus ENTRY(brk) 59 1.1 paulus #ifdef PIC 60 1.6 thorpej movl #_C_LABEL(_GLOBAL_OFFSET_TABLE_),a1 61 1.1 paulus lea pc@(0,a1:l),a1 62 1.1 paulus movl a1@(minbrk:w),a0 63 1.1 paulus movl a0@,d0 64 1.1 paulus #else 65 1.1 paulus movl minbrk,d0 66 1.1 paulus #endif 67 1.1 paulus cmpl sp@(4),d0 68 1.1 paulus jle ok 69 1.1 paulus movl d0,sp@(4) 70 1.1 paulus ok: 71 1.2 mycroft movl #SYS_break,d0 72 1.1 paulus trap #0 73 1.1 paulus jcs err 74 1.1 paulus #ifdef PIC 75 1.1 paulus movl a1@(curbrk:w),a0 76 1.1 paulus movl sp@(4),a0@ 77 1.1 paulus #else 78 1.1 paulus movl sp@(4),curbrk 79 1.1 paulus #endif 80 1.1 paulus clrl d0 81 1.1 paulus rts 82 1.1 paulus err: 83 1.1 paulus jra cerror 84
Indexes created Fri Sep 26 20:09:58 GMT 2025