brk.S revision 1.7
1 1.7 jonathan /* $NetBSD: brk.S,v 1.7 1996/09/17 01:32:40 jonathan Exp $ */ 2 1.6 jonathan 3 1.1 glass /*- 4 1.1 glass * Copyright (c) 1991, 1993 5 1.1 glass * The Regents of the University of California. All rights reserved. 6 1.1 glass * 7 1.1 glass * This code is derived from software contributed to Berkeley by 8 1.1 glass * Ralph Campbell. 9 1.1 glass * 10 1.1 glass * Redistribution and use in source and binary forms, with or without 11 1.1 glass * modification, are permitted provided that the following conditions 12 1.1 glass * are met: 13 1.1 glass * 1. Redistributions of source code must retain the above copyright 14 1.1 glass * notice, this list of conditions and the following disclaimer. 15 1.1 glass * 2. Redistributions in binary form must reproduce the above copyright 16 1.1 glass * notice, this list of conditions and the following disclaimer in the 17 1.1 glass * documentation and/or other materials provided with the distribution. 18 1.1 glass * 3. All advertising materials mentioning features or use of this software 19 1.1 glass * must display the following acknowledgement: 20 1.1 glass * This product includes software developed by the University of 21 1.1 glass * California, Berkeley and its contributors. 22 1.1 glass * 4. Neither the name of the University nor the names of its contributors 23 1.1 glass * may be used to endorse or promote products derived from this software 24 1.1 glass * without specific prior written permission. 25 1.1 glass * 26 1.1 glass * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 27 1.1 glass * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 28 1.1 glass * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 29 1.1 glass * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 30 1.1 glass * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 31 1.1 glass * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 32 1.1 glass * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 33 1.1 glass * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 34 1.1 glass * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 35 1.1 glass * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 36 1.1 glass * SUCH DAMAGE. 37 1.1 glass */ 38 1.1 glass 39 1.5 jonathan #include "SYS.h" 40 1.5 jonathan 41 1.1 glass #if defined(LIBC_SCCS) && !defined(lint) 42 1.1 glass ASMSTR("from: @(#)brk.s 8.1 (Berkeley) 6/4/93") 43 1.7 jonathan ASMSTR("$NetBSD: brk.S,v 1.7 1996/09/17 01:32:40 jonathan Exp $") 44 1.1 glass #endif /* LIBC_SCCS and not lint */ 45 1.4 mycroft 46 1.7 jonathan #ifdef ABICALLS 47 1.7 jonathan .abicalls 48 1.7 jonathan #endif 49 1.7 jonathan 50 1.4 mycroft .globl minbrk 51 1.4 mycroft .globl curbrk 52 1.4 mycroft 53 1.4 mycroft .data 54 1.4 mycroft minbrk: .word _C_LABEL(end) 55 1.4 mycroft .text 56 1.1 glass 57 1.3 mycroft LEAF(brk) 58 1.7 jonathan #ifdef ABICALLS 59 1.7 jonathan .set noreorder 60 1.7 jonathan .cpload t9 61 1.7 jonathan .set reorder 62 1.7 jonathan #endif 63 1.1 glass lw v0, minbrk 64 1.7 jonathan bgeu a0, v0, _C_LABEL(_brk) 65 1.1 glass move a0, v0 # dont allow break < minbrk 66 1.3 mycroft ALEAF(_brk) 67 1.4 mycroft li v0, SYS_break 68 1.1 glass syscall 69 1.1 glass bne a3, zero, 1f 70 1.1 glass sw a0, curbrk 71 1.1 glass move v0, zero 72 1.1 glass j ra 73 1.1 glass 1: 74 1.7 jonathan la t9, _C_LABEL(cerror) 75 1.7 jonathan jr t9 76 1.3 mycroft END(brk) 77
Indexes created Wed Sep 24 05:09:52 GMT 2025