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 SYSFASTTRAP(GETHRESTIME) 48/ 49/ gethrestime trap returns seconds in %eax, nsecs in %edx 50/ need to convert nsecs to usecs & store into area pointed 51/ to by struct timeval * argument. 52/ 53 movl 4(%esp), %ecx / put ptr to timeval in %ecx 54 jecxz 1f / bail if we get a null pointer 55 movl %eax, (%ecx) / store seconds into timeval ptr 56 movl $274877907, %eax / divide by 1000 as impl. by gcc 57 imull %edx / See Hacker's Delight pg 162 58 sarl $6, %edx / simplified by 0 <= nsec <= 1e9 59 movl %edx, 4(%ecx) / store usecs into timeval ptr + 4. 601: 61 RETC / return 0 62 SET_SIZE(_gettimeofday) 63 64 65