brk.S revision 1.13
1 1.13 kleink /* $NetBSD: brk.S,v 1.13 2001/05/05 17:46:37 kleink 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 1.13 kleink RCSID("$NetBSD: brk.S,v 1.13 2001/05/05 17:46:37 kleink Exp $") 47 1.5 thorpej #endif 48 1.1 paulus #endif /* LIBC_SCCS and not lint */ 49 1.1 paulus 50 1.13 kleink .globl _end 51 1.7 kleink .globl _C_LABEL(__minbrk) 52 1.7 kleink .globl CURBRK 53 1.3 mycroft 54 1.12 kleink #ifdef WEAK_ALIAS 55 1.12 kleink WEAK_ALIAS(brk, _brk) 56 1.12 kleink #endif 57 1.12 kleink 58 1.3 mycroft .data 59 1.7 kleink _C_LABEL(__minbrk): 60 1.13 kleink .long _end 61 1.11 kleink 62 1.3 mycroft .text 63 1.3 mycroft 64 1.11 kleink ENTRY(_brk) 65 1.1 paulus #ifdef PIC 66 1.9 itohy #ifdef __ELF__ 67 1.10 thorpej lea %pc@(_GLOBAL_OFFSET_TABLE_@GOTPC),%a1 68 1.10 thorpej movl %a1@(_C_LABEL(__minbrk)@GOT:w),%a0 69 1.9 itohy #else 70 1.10 thorpej movl #_C_LABEL(_GLOBAL_OFFSET_TABLE_),%a1 71 1.10 thorpej lea %pc@(0,a1:l),%a1 72 1.10 thorpej movl %a1@(_C_LABEL(__minbrk):w),%a0 73 1.9 itohy #endif 74 1.10 thorpej movl %a0@,%d0 75 1.1 paulus #else 76 1.10 thorpej movl _C_LABEL(__minbrk),%d0 77 1.1 paulus #endif 78 1.10 thorpej cmpl %sp@(4),%d0 79 1.1 paulus jle ok 80 1.10 thorpej movl %d0,%sp@(4) 81 1.1 paulus ok: 82 1.10 thorpej movl #SYS_break,%d0 83 1.1 paulus trap #0 84 1.1 paulus jcs err 85 1.1 paulus #ifdef PIC 86 1.9 itohy #ifdef __ELF__ 87 1.10 thorpej movl %a1@(CURBRK@GOT:w),%a0 88 1.9 itohy #else 89 1.10 thorpej movl %a1@(CURBRK:w),%a0 90 1.9 itohy #endif 91 1.10 thorpej movl %sp@(4),%a0@ 92 1.1 paulus #else 93 1.10 thorpej movl %sp@(4),CURBRK 94 1.1 paulus #endif 95 1.10 thorpej clrl %d0 96 1.1 paulus rts 97 1.1 paulus err: 98 1.8 kleink jra PIC_PLT(CERROR) 99
Indexes created Thu Sep 25 16:09:42 GMT 2025