1 1.10 joerg /* $NetBSD: sbrk.S,v 1.10 2013/09/12 15:36:16 joerg Exp $ */ 2 1.1 msaitoh 3 1.1 msaitoh /*- 4 1.1 msaitoh * Copyright (c) 1990 The Regents of the University of California. 5 1.1 msaitoh * All rights reserved. 6 1.1 msaitoh * 7 1.1 msaitoh * This code is derived from software contributed to Berkeley by 8 1.1 msaitoh * William Jolitz. 9 1.1 msaitoh * 10 1.1 msaitoh * Redistribution and use in source and binary forms, with or without 11 1.1 msaitoh * modification, are permitted provided that the following conditions 12 1.1 msaitoh * are met: 13 1.1 msaitoh * 1. Redistributions of source code must retain the above copyright 14 1.1 msaitoh * notice, this list of conditions and the following disclaimer. 15 1.1 msaitoh * 2. Redistributions in binary form must reproduce the above copyright 16 1.1 msaitoh * notice, this list of conditions and the following disclaimer in the 17 1.1 msaitoh * documentation and/or other materials provided with the distribution. 18 1.8 agc * 3. Neither the name of the University nor the names of its contributors 19 1.1 msaitoh * may be used to endorse or promote products derived from this software 20 1.1 msaitoh * without specific prior written permission. 21 1.1 msaitoh * 22 1.1 msaitoh * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 1.1 msaitoh * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 1.1 msaitoh * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 1.1 msaitoh * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 1.1 msaitoh * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 1.1 msaitoh * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 1.1 msaitoh * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 1.1 msaitoh * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 1.1 msaitoh * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 1.1 msaitoh * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 1.1 msaitoh * SUCH DAMAGE. 33 1.1 msaitoh * 34 1.1 msaitoh * from: @(#)sbrk.s 5.1 (Berkeley) 4/23/90 35 1.1 msaitoh */ 36 1.1 msaitoh 37 1.1 msaitoh #include <machine/asm.h> 38 1.1 msaitoh #if defined(SYSLIBC_SCCS) && !defined(lint) 39 1.10 joerg RCSID("$NetBSD: sbrk.S,v 1.10 2013/09/12 15:36:16 joerg Exp $") 40 1.1 msaitoh #endif /* SYSLIBC_SCCS and not lint */ 41 1.1 msaitoh 42 1.1 msaitoh #include "SYS.h" 43 1.1 msaitoh 44 1.1 msaitoh .globl _end 45 1.1 msaitoh .globl curbrk 46 1.1 msaitoh 47 1.3 kleink #ifdef WEAK_ALIAS 48 1.5 tsubai WEAK_ALIAS(sbrk,_sbrk) 49 1.3 kleink #endif 50 1.3 kleink 51 1.1 msaitoh .data 52 1.1 msaitoh curbrk: .long _end 53 1.1 msaitoh .text 54 1.1 msaitoh 55 1.3 kleink ENTRY(_sbrk) 56 1.1 msaitoh mov r4, r2 57 1.10 joerg #ifdef __PIC__ 58 1.7 marcus mova L_GOT, r0 59 1.7 marcus mov.l L_GOT, r3 60 1.7 marcus add r0, r3 61 1.1 msaitoh mov.l Lcurbrk, r0 62 1.7 marcus mov.l @(r0, r3), r0 63 1.7 marcus #else 64 1.7 marcus mov.l Lcurbrk, r0 65 1.7 marcus #endif 66 1.6 msaitoh mov.l @r0, r0 67 1.1 msaitoh add r0, r4 68 1.1 msaitoh mov.l LSYS_break, r0 69 1.1 msaitoh trapa #0x80 70 1.1 msaitoh bf err 71 1.10 joerg #ifdef __PIC__ 72 1.7 marcus mov.l Lcurbrk, r0 73 1.7 marcus mov.l @(r0, r3), r1 74 1.7 marcus #else 75 1.1 msaitoh mov.l Lcurbrk, r1 76 1.7 marcus #endif 77 1.1 msaitoh mov.l @r1, r0 78 1.1 msaitoh add r0, r2 79 1.2 msaitoh rts 80 1.1 msaitoh mov.l r2, @r1 81 1.1 msaitoh err: 82 1.9 uwe JUMP_CERROR 83 1.1 msaitoh 84 1.6 msaitoh .align 2 85 1.7 marcus LSYS_break: .long SYS_break 86 1.10 joerg #ifdef __PIC__ 87 1.7 marcus L_GOT: .long _GLOBAL_OFFSET_TABLE_ 88 1.7 marcus Lcurbrk: .long curbrk@GOT 89 1.7 marcus #else 90 1.1 msaitoh Lcurbrk: .long curbrk 91 1.7 marcus #endif 92 1.9 uwe SET_ENTRY_SIZE(_sbrk) 93
Indexes created Wed Sep 24 05:09:52 GMT 2025