1 1.18 tsutsui /* $NetBSD: brk.S,v 1.18 2010/12/12 09:00:37 tsutsui 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 1.16 agc * 3. Neither the name of the University nor the names of its contributors 19 1.1 glass * may be used to endorse or promote products derived from this software 20 1.1 glass * without specific prior written permission. 21 1.1 glass * 22 1.1 glass * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 1.1 glass * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 1.1 glass * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 1.1 glass * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 1.1 glass * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 1.1 glass * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 1.1 glass * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 1.1 glass * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 1.1 glass * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 1.1 glass * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 1.1 glass * SUCH DAMAGE. 33 1.1 glass */ 34 1.1 glass 35 1.5 jonathan #include "SYS.h" 36 1.5 jonathan 37 1.1 glass #if defined(LIBC_SCCS) && !defined(lint) 38 1.17 matt #if 0 39 1.17 matt RCSID("from: @(#)brk.s 8.1 (Berkeley) 6/4/93") 40 1.17 matt #else 41 1.18 tsutsui RCSID("$NetBSD: brk.S,v 1.18 2010/12/12 09:00:37 tsutsui Exp $") 42 1.17 matt #endif 43 1.1 glass #endif /* LIBC_SCCS and not lint */ 44 1.7 jonathan 45 1.8 kleink .globl _C_LABEL(__minbrk) 46 1.8 kleink .globl _C_LABEL(__curbrk) 47 1.9 kleink .globl _C_LABEL(_end) 48 1.4 mycroft 49 1.10 kleink #ifdef WEAK_ALIAS 50 1.10 kleink WEAK_ALIAS(brk, _brk) 51 1.10 kleink #endif 52 1.10 kleink 53 1.4 mycroft .data 54 1.8 kleink _C_LABEL(__minbrk): 55 1.17 matt PTR_WORD _C_LABEL(_end) 56 1.4 mycroft .text 57 1.1 glass 58 1.10 kleink LEAF(_brk) 59 1.17 matt PIC_PROLOGUE(_brk) 60 1.17 matt PTR_LA t0, _C_LABEL(__minbrk) 61 1.17 matt PTR_L v0, 0(t0) 62 1.17 matt bgeu a0, v0, 1f 63 1.17 matt move a0, v0 # dont allow break < minbrk 64 1.12 kleink 1: 65 1.17 matt li v0, SYS_break 66 1.1 glass syscall 67 1.17 matt bne a3, zero, 2f 68 1.18 tsutsui PTR_LA t0, _C_LABEL(__curbrk) 69 1.17 matt PTR_S a0, 0(t0) 70 1.17 matt move v0, zero 71 1.17 matt PIC_RETURN() 72 1.12 kleink 2: 73 1.17 matt PIC_TAILCALL(__cerror) 74 1.15 simonb END(_brk) 75
Indexes created Mon Sep 22 05:09:51 GMT 2025