1 1.6 uebayasi /* $NetBSD: sbrk.S,v 1.6 2014/05/22 15:01:57 uebayasi Exp $ */ 2 1.1 fvdl 3 1.1 fvdl /*- 4 1.1 fvdl * Copyright (c) 1990 The Regents of the University of California. 5 1.1 fvdl * All rights reserved. 6 1.1 fvdl * 7 1.1 fvdl * This code is derived from software contributed to Berkeley by 8 1.1 fvdl * William Jolitz. 9 1.1 fvdl * 10 1.1 fvdl * Redistribution and use in source and binary forms, with or without 11 1.1 fvdl * modification, are permitted provided that the following conditions 12 1.1 fvdl * are met: 13 1.1 fvdl * 1. Redistributions of source code must retain the above copyright 14 1.1 fvdl * notice, this list of conditions and the following disclaimer. 15 1.1 fvdl * 2. Redistributions in binary form must reproduce the above copyright 16 1.1 fvdl * notice, this list of conditions and the following disclaimer in the 17 1.1 fvdl * documentation and/or other materials provided with the distribution. 18 1.2 agc * 3. Neither the name of the University nor the names of its contributors 19 1.1 fvdl * may be used to endorse or promote products derived from this software 20 1.1 fvdl * without specific prior written permission. 21 1.1 fvdl * 22 1.1 fvdl * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 1.1 fvdl * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 1.1 fvdl * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 1.1 fvdl * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 1.1 fvdl * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 1.1 fvdl * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 1.1 fvdl * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 1.1 fvdl * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 1.1 fvdl * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 1.1 fvdl * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 1.1 fvdl * SUCH DAMAGE. 33 1.1 fvdl * 34 1.1 fvdl * from: @(#)sbrk.s 5.1 (Berkeley) 4/23/90 35 1.1 fvdl */ 36 1.1 fvdl 37 1.1 fvdl #include <machine/asm.h> 38 1.1 fvdl #if defined(SYSLIBC_SCCS) && !defined(lint) 39 1.6 uebayasi RCSID("$NetBSD: sbrk.S,v 1.6 2014/05/22 15:01:57 uebayasi Exp $") 40 1.1 fvdl #endif /* SYSLIBC_SCCS and not lint */ 41 1.1 fvdl 42 1.1 fvdl #include "SYS.h" 43 1.1 fvdl 44 1.1 fvdl .globl _end 45 1.1 fvdl .globl CURBRK 46 1.1 fvdl 47 1.1 fvdl #ifdef WEAK_ALIAS 48 1.1 fvdl WEAK_ALIAS(sbrk, _sbrk) 49 1.1 fvdl #endif 50 1.1 fvdl 51 1.1 fvdl .data 52 1.1 fvdl CURBRK: .quad _end 53 1.1 fvdl .text 54 1.1 fvdl 55 1.1 fvdl ENTRY(_sbrk) 56 1.5 joerg #ifdef __PIC__ 57 1.1 fvdl movq PIC_GOT(CURBRK),%rdx 58 1.1 fvdl movq (%rdx),%rax 59 1.3 rmind test %rdi,%rdi 60 1.3 rmind jz out 61 1.1 fvdl addq %rax,%rdi 62 1.1 fvdl SYSTRAP(break) 63 1.1 fvdl jc err 64 1.1 fvdl movq PIC_GOT(CURBRK),%rdx 65 1.1 fvdl movq (%rdx),%rax 66 1.1 fvdl movq %rdi,(%rdx) 67 1.3 rmind out: 68 1.1 fvdl ret 69 1.1 fvdl err: 70 1.4 joerg jmp CERROR 71 1.1 fvdl #else 72 1.1 fvdl movq CURBRK(%rip),%rax 73 1.3 rmind test %rdi,%rdi 74 1.3 rmind jz out 75 1.1 fvdl movq %rdi,%rsi 76 1.1 fvdl addq %rax,%rdi 77 1.1 fvdl SYSTRAP(break) 78 1.1 fvdl jc err 79 1.1 fvdl movq CURBRK(%rip),%rax 80 1.1 fvdl addq %rsi,CURBRK(%rip) 81 1.3 rmind out: 82 1.1 fvdl ret 83 1.1 fvdl err: 84 1.1 fvdl jmp CERROR 85 1.1 fvdl #endif 86 1.6 uebayasi END(_sbrk) 87
Indexes created Mon Sep 29 15:09:53 GMT 2025