sbrk.S revision 1.14
1 1.14 agc /* $NetBSD: sbrk.S,v 1.14 2003/08/07 16:42:14 agc 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 1.14 agc * 3. Neither the name of the University nor the names of its contributors 20 1.1 paulus * may be used to endorse or promote products derived from this software 21 1.1 paulus * without specific prior written permission. 22 1.1 paulus * 23 1.1 paulus * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 1.1 paulus * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 1.1 paulus * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 1.1 paulus * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 1.1 paulus * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 1.1 paulus * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 1.1 paulus * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 1.1 paulus * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 1.1 paulus * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 1.1 paulus * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 1.1 paulus * SUCH DAMAGE. 34 1.1 paulus */ 35 1.1 paulus 36 1.5 thorpej #include "SYS.h" 37 1.5 thorpej 38 1.1 paulus #if defined(LIBC_SCCS) && !defined(lint) 39 1.5 thorpej #if 0 40 1.5 thorpej RCSID("from: @(#)sbrk.s 5.1 (Berkeley) 5/12/90") 41 1.5 thorpej #else 42 1.14 agc RCSID("$NetBSD: sbrk.S,v 1.14 2003/08/07 16:42:14 agc Exp $") 43 1.5 thorpej #endif 44 1.1 paulus #endif /* LIBC_SCCS and not lint */ 45 1.1 paulus 46 1.13 kleink .globl _end 47 1.7 kleink .globl CURBRK 48 1.1 paulus 49 1.11 kleink #ifdef WEAK_ALIAS 50 1.11 kleink WEAK_ALIAS(sbrk, _sbrk) 51 1.11 kleink #endif 52 1.11 kleink 53 1.12 kleink .data 54 1.13 kleink CURBRK: .long _end 55 1.12 kleink 56 1.1 paulus .text 57 1.1 paulus 58 1.11 kleink ENTRY(_sbrk) 59 1.1 paulus #ifdef PIC 60 1.9 itohy #ifdef __ELF__ 61 1.10 thorpej lea %pc@(_GLOBAL_OFFSET_TABLE_@GOTPC),%a1 62 1.10 thorpej movl %a1@(CURBRK@GOT:w),%a1 63 1.9 itohy #else 64 1.10 thorpej movl #_C_LABEL(_GLOBAL_OFFSET_TABLE_),%a1 65 1.10 thorpej lea %pc@(0,%a1:l),%a1 66 1.10 thorpej movl %a1@(CURBRK:w),%a1 67 1.9 itohy #endif 68 1.10 thorpej movl %a1@,%d0 69 1.1 paulus #else 70 1.10 thorpej movl CURBRK,%d0 71 1.1 paulus #endif 72 1.10 thorpej addl %d0,%sp@(4) 73 1.10 thorpej movl #SYS_break,%d0 74 1.1 paulus trap #0 75 1.1 paulus jcs err 76 1.1 paulus #ifdef PIC 77 1.10 thorpej movl %a1@,%d0 78 1.10 thorpej movl %sp@(4),%a1@ 79 1.1 paulus #else 80 1.10 thorpej movl CURBRK,%d0 81 1.10 thorpej movl %sp@(4),CURBRK 82 1.9 itohy #endif 83 1.9 itohy #ifdef __SVR4_ABI__ 84 1.10 thorpej movl %d0,%a0 85 1.1 paulus #endif 86 1.1 paulus rts 87 1.1 paulus err: 88 1.8 kleink jra PIC_PLT(CERROR) 89
Indexes created Thu Sep 25 16:09:42 GMT 2025