1/* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License, Version 1.0 only 6 * (the "License"). You may not use this file except in compliance 7 * with the License. 8 * 9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10 * or http://www.opensolaris.org/os/licensing. 11 * See the License for the specific language governing permissions 12 * and limitations under the License. 13 * 14 * When distributing Covered Code, include this CDDL HEADER in each 15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16 * If applicable, add the following below this CDDL HEADER, with the 17 * fields enclosed by brackets "[]" replaced with your own identifying 18 * information: Portions Copyright [yyyy] [name of copyright owner] 19 * 20 * CDDL HEADER END 21 */ 22/* 23 * Copyright 2004 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27#pragma ident "%Z%%M% %I% %E% SMI" 28 29 .file "%M%" 30 31#include <sys/asm_linkage.h> 32 33 ANSI_PRAGMA_WEAK(gettimeofday,function) 34 35#include "SYS.h" 36 37/* 38 * implements int gettimeofday(struct timeval *tp, void *tzp) 39 * 40 * note that tzp is always ignored 41 */ 42 43 ENTRY(_gettimeofday) 44/* 45 * use long long gethrestime() 46 */ 47 pushq %rdi /* pointer to timeval */ 48 SYSFASTTRAP(GETHRESTIME) 49/* 50 * gethrestime trap returns seconds in %eax, nsecs in %edx 51 * need to convert nsecs to usecs & store into area pointed 52 * to by struct timeval * argument. 53 */ 54 popq %rcx /* pointer to timeval */ 55 jrcxz 1f /* bail if we get a null pointer */ 56 movq %rax, (%rcx) /* store seconds into timeval ptr */ 57 movl $274877907, %eax /* divide by 1000 as impl. by gcc */ 58 imull %edx /* See Hacker's Delight pg 162 */ 59 sarl $6, %edx /* simplified by 0 <= nsec <= 1e9 */ 60 movq %rdx, 8(%rcx) /* store usecs into timeval ptr + 8. */ 611: 62 RETC /* return 0 */ 63 SET_SIZE(_gettimeofday) 64 65