brk.S revision 1.16
1 1.16 matt /* $NetBSD: brk.S,v 1.16 2013/07/16 20:49:42 matt 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: @(#)brk.s 5.1 (Berkeley) 5/12/90") 41 1.5 thorpej #else 42 1.16 matt RCSID("$NetBSD: brk.S,v 1.16 2013/07/16 20:49:42 matt 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 _C_LABEL(__minbrk) 48 1.16 matt .globl _C_LABEL(__curbrk) 49 1.3 mycroft 50 1.12 kleink #ifdef WEAK_ALIAS 51 1.12 kleink WEAK_ALIAS(brk, _brk) 52 1.12 kleink #endif 53 1.12 kleink 54 1.3 mycroft .data 55 1.7 kleink _C_LABEL(__minbrk): 56 1.13 kleink .long _end 57 1.11 kleink 58 1.3 mycroft .text 59 1.3 mycroft 60 1.11 kleink ENTRY(_brk) 61 1.1 paulus #ifdef PIC 62 1.16 matt lea (_GLOBAL_OFFSET_TABLE_@GOTPC,%pc),%a1 63 1.16 matt movl _C_LABEL(__minbrk)@GOT:w(%a1),%a0 64 1.16 matt movl (%a0),%d0 65 1.1 paulus #else 66 1.10 thorpej movl _C_LABEL(__minbrk),%d0 67 1.1 paulus #endif 68 1.16 matt cmpl 4(%sp),%d0 69 1.15 martin jls ok 70 1.16 matt movl %d0,4(%sp) 71 1.1 paulus ok: 72 1.10 thorpej movl #SYS_break,%d0 73 1.1 paulus trap #0 74 1.1 paulus jcs err 75 1.1 paulus #ifdef PIC 76 1.16 matt movl _C_LABEL(__curbrk)@GOT:w(%a1),%a0 77 1.16 matt movl 4(%sp),(%a0) 78 1.1 paulus #else 79 1.16 matt movl 4(%sp),_C_LABEL(__curbrk) 80 1.1 paulus #endif 81 1.10 thorpej clrl %d0 82 1.1 paulus rts 83 1.1 paulus err: 84 1.8 kleink jra PIC_PLT(CERROR) 85
Indexes created Sat Sep 27 22:09:54 GMT 2025