sbrk.S revision 1.14
1 /* $NetBSD: sbrk.S,v 1.14 2003/08/07 16:42:14 agc Exp $ */ 2 3 /*- 4 * Copyright (c) 1990 The Regents of the University of California. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * the Systems Programming Group of the University of Utah Computer 9 * Science Department. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 3. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 */ 35 36 #include "SYS.h" 37 38 #if defined(LIBC_SCCS) && !defined(lint) 39 #if 0 40 RCSID("from: @(#)sbrk.s 5.1 (Berkeley) 5/12/90") 41 #else 42 RCSID("$NetBSD: sbrk.S,v 1.14 2003/08/07 16:42:14 agc Exp $") 43 #endif 44 #endif /* LIBC_SCCS and not lint */ 45 46 .globl _end 47 .globl CURBRK 48 49 #ifdef WEAK_ALIAS 50 WEAK_ALIAS(sbrk, _sbrk) 51 #endif 52 53 .data 54 CURBRK: .long _end 55 56 .text 57 58 ENTRY(_sbrk) 59 #ifdef PIC 60 #ifdef __ELF__ 61 lea %pc@(_GLOBAL_OFFSET_TABLE_@GOTPC),%a1 62 movl %a1@(CURBRK@GOT:w),%a1 63 #else 64 movl #_C_LABEL(_GLOBAL_OFFSET_TABLE_),%a1 65 lea %pc@(0,%a1:l),%a1 66 movl %a1@(CURBRK:w),%a1 67 #endif 68 movl %a1@,%d0 69 #else 70 movl CURBRK,%d0 71 #endif 72 addl %d0,%sp@(4) 73 movl #SYS_break,%d0 74 trap #0 75 jcs err 76 #ifdef PIC 77 movl %a1@,%d0 78 movl %sp@(4),%a1@ 79 #else 80 movl CURBRK,%d0 81 movl %sp@(4),CURBRK 82 #endif 83 #ifdef __SVR4_ABI__ 84 movl %d0,%a0 85 #endif 86 rts 87 err: 88 jra PIC_PLT(CERROR) 89
Indexes created Fri Sep 26 08:10:20 GMT 2025