sbrk.S revision 1.3.6.2
1 1.3.6.2 rmind /* $NetBSD: sbrk.S,v 1.3.6.2 2008/07/02 20:07:44 rmind Exp $ */ 2 1.3.6.2 rmind 3 1.3.6.2 rmind /*- 4 1.3.6.2 rmind * Copyright (c) 1990 The Regents of the University of California. 5 1.3.6.2 rmind * All rights reserved. 6 1.3.6.2 rmind * 7 1.3.6.2 rmind * This code is derived from software contributed to Berkeley by 8 1.3.6.2 rmind * William Jolitz. 9 1.3.6.2 rmind * 10 1.3.6.2 rmind * Redistribution and use in source and binary forms, with or without 11 1.3.6.2 rmind * modification, are permitted provided that the following conditions 12 1.3.6.2 rmind * are met: 13 1.3.6.2 rmind * 1. Redistributions of source code must retain the above copyright 14 1.3.6.2 rmind * notice, this list of conditions and the following disclaimer. 15 1.3.6.2 rmind * 2. Redistributions in binary form must reproduce the above copyright 16 1.3.6.2 rmind * notice, this list of conditions and the following disclaimer in the 17 1.3.6.2 rmind * documentation and/or other materials provided with the distribution. 18 1.3.6.2 rmind * 3. Neither the name of the University nor the names of its contributors 19 1.3.6.2 rmind * may be used to endorse or promote products derived from this software 20 1.3.6.2 rmind * without specific prior written permission. 21 1.3.6.2 rmind * 22 1.3.6.2 rmind * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 1.3.6.2 rmind * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 1.3.6.2 rmind * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 1.3.6.2 rmind * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 1.3.6.2 rmind * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 1.3.6.2 rmind * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 1.3.6.2 rmind * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 1.3.6.2 rmind * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 1.3.6.2 rmind * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 1.3.6.2 rmind * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 1.3.6.2 rmind * SUCH DAMAGE. 33 1.3.6.2 rmind * 34 1.3.6.2 rmind * from: @(#)sbrk.s 5.1 (Berkeley) 4/23/90 35 1.3.6.2 rmind */ 36 1.3.6.2 rmind 37 1.3.6.2 rmind #include <machine/asm.h> 38 1.3.6.2 rmind #if defined(SYSLIBC_SCCS) && !defined(lint) 39 1.3.6.2 rmind RCSID("$NetBSD: sbrk.S,v 1.3.6.2 2008/07/02 20:07:44 rmind Exp $") 40 1.3.6.2 rmind #endif /* SYSLIBC_SCCS and not lint */ 41 1.3.6.2 rmind 42 1.3.6.2 rmind #include "SYS.h" 43 1.3.6.2 rmind 44 1.3.6.2 rmind .globl _end 45 1.3.6.2 rmind .globl CURBRK 46 1.3.6.2 rmind 47 1.3.6.2 rmind #ifdef WEAK_ALIAS 48 1.3.6.2 rmind WEAK_ALIAS(sbrk, _sbrk) 49 1.3.6.2 rmind #endif 50 1.3.6.2 rmind 51 1.3.6.2 rmind .data 52 1.3.6.2 rmind CURBRK: .quad _end 53 1.3.6.2 rmind .text 54 1.3.6.2 rmind 55 1.3.6.2 rmind ENTRY(_sbrk) 56 1.3.6.2 rmind #ifdef PIC 57 1.3.6.2 rmind movq PIC_GOT(CURBRK),%rdx 58 1.3.6.2 rmind movq (%rdx),%rax 59 1.3.6.2 rmind test %rdi,%rdi 60 1.3.6.2 rmind jz out 61 1.3.6.2 rmind addq %rax,%rdi 62 1.3.6.2 rmind SYSTRAP(break) 63 1.3.6.2 rmind jc err 64 1.3.6.2 rmind movq PIC_GOT(CURBRK),%rdx 65 1.3.6.2 rmind movq (%rdx),%rax 66 1.3.6.2 rmind movq %rdi,(%rdx) 67 1.3.6.2 rmind out: 68 1.3.6.2 rmind ret 69 1.3.6.2 rmind err: 70 1.3.6.2 rmind mov PIC_GOT(CERROR),%rdx 71 1.3.6.2 rmind jmp *%rdx 72 1.3.6.2 rmind #else 73 1.3.6.2 rmind movq CURBRK(%rip),%rax 74 1.3.6.2 rmind test %rdi,%rdi 75 1.3.6.2 rmind jz out 76 1.3.6.2 rmind movq %rdi,%rsi 77 1.3.6.2 rmind addq %rax,%rdi 78 1.3.6.2 rmind SYSTRAP(break) 79 1.3.6.2 rmind jc err 80 1.3.6.2 rmind movq CURBRK(%rip),%rax 81 1.3.6.2 rmind addq %rsi,CURBRK(%rip) 82 1.3.6.2 rmind out: 83 1.3.6.2 rmind ret 84 1.3.6.2 rmind err: 85 1.3.6.2 rmind jmp CERROR 86 1.3.6.2 rmind #endif 87
Indexes created Thu Oct 23 22:10:10 GMT 2025