1*2c2f96dcSApple OSS Distributions/* 2*2c2f96dcSApple OSS Distributions * Copyright (c) 1999-2016 Apple Inc. All rights reserved. 3*2c2f96dcSApple OSS Distributions * 4*2c2f96dcSApple OSS Distributions * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ 5*2c2f96dcSApple OSS Distributions * 6*2c2f96dcSApple OSS Distributions * This file contains Original Code and/or Modifications of Original Code 7*2c2f96dcSApple OSS Distributions * as defined in and that are subject to the Apple Public Source License 8*2c2f96dcSApple OSS Distributions * Version 2.0 (the 'License'). You may not use this file except in 9*2c2f96dcSApple OSS Distributions * compliance with the License. The rights granted to you under the License 10*2c2f96dcSApple OSS Distributions * may not be used to create, or enable the creation or redistribution of, 11*2c2f96dcSApple OSS Distributions * unlawful or unlicensed copies of an Apple operating system, or to 12*2c2f96dcSApple OSS Distributions * circumvent, violate, or enable the circumvention or violation of, any 13*2c2f96dcSApple OSS Distributions * terms of an Apple operating system software license agreement. 14*2c2f96dcSApple OSS Distributions * 15*2c2f96dcSApple OSS Distributions * Please obtain a copy of the License at 16*2c2f96dcSApple OSS Distributions * http://www.opensource.apple.com/apsl/ and read it before using this file. 17*2c2f96dcSApple OSS Distributions * 18*2c2f96dcSApple OSS Distributions * The Original Code and all software distributed under the License are 19*2c2f96dcSApple OSS Distributions * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER 20*2c2f96dcSApple OSS Distributions * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, 21*2c2f96dcSApple OSS Distributions * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, 22*2c2f96dcSApple OSS Distributions * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. 23*2c2f96dcSApple OSS Distributions * Please see the License for the specific language governing rights and 24*2c2f96dcSApple OSS Distributions * limitations under the License. 25*2c2f96dcSApple OSS Distributions * 26*2c2f96dcSApple OSS Distributions * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ 27*2c2f96dcSApple OSS Distributions */ 28*2c2f96dcSApple OSS Distributions 29*2c2f96dcSApple OSS Distributions#include "SYS.h" 30*2c2f96dcSApple OSS Distributions 31*2c2f96dcSApple OSS Distributions/* 32*2c2f96dcSApple OSS Distributions * A third argument, of type uint64_t*, was added to the gettimeofday syscall 33*2c2f96dcSApple OSS Distributions * for use cases that also want to know the mach_absolute_time that matches the 34*2c2f96dcSApple OSS Distributions * time value returned. 35*2c2f96dcSApple OSS Distributions * 36*2c2f96dcSApple OSS Distributions * __gettimeofday takes the traditional two arguments. It will zero out the 37*2c2f96dcSApple OSS Distributions * third argument argument before entering the kernel, behaving like the old 38*2c2f96dcSApple OSS Distributions * call. 39*2c2f96dcSApple OSS Distributions * 40*2c2f96dcSApple OSS Distributions * __gettimeofday_with_mach will pass it through and supporting kernels will 41*2c2f96dcSApple OSS Distributions * copy-out the mach_absolute_time. Old kernels will leave the pointed to 42*2c2f96dcSApple OSS Distributions * value alone. 43*2c2f96dcSApple OSS Distributions */ 44*2c2f96dcSApple OSS Distributions 45*2c2f96dcSApple OSS Distributions.private_extern ___gettimeofday_with_mach 46*2c2f96dcSApple OSS Distributions 47*2c2f96dcSApple OSS Distributions#if defined(__i386__) 48*2c2f96dcSApple OSS Distributions 49*2c2f96dcSApple OSS DistributionsLABEL(___gettimeofday) 50*2c2f96dcSApple OSS Distributions pushl $0 51*2c2f96dcSApple OSS Distributions pushl 12(%esp) 52*2c2f96dcSApple OSS Distributions pushl 12(%esp) 53*2c2f96dcSApple OSS Distributions calll ___gettimeofday_with_mach 54*2c2f96dcSApple OSS Distributions addl $12, %esp 55*2c2f96dcSApple OSS Distributions ret 56*2c2f96dcSApple OSS Distributions 57*2c2f96dcSApple OSS DistributionsLABEL(___gettimeofday_with_mach) 58*2c2f96dcSApple OSS Distributions UNIX_SYSCALL_INT_NONAME(gettimeofday,0) 59*2c2f96dcSApple OSS Distributions /* 60*2c2f96dcSApple OSS Distributions * <rdar://problem/26410029> 61*2c2f96dcSApple OSS Distributions * If eax is 0, we're on a new kernel and timeval was written by the kernel. 62*2c2f96dcSApple OSS Distributions * Otherwise, eax:edx contains the timeval and we marshal into timeval. 63*2c2f96dcSApple OSS Distributions */ 64*2c2f96dcSApple OSS Distributions cmp $0, %eax 65*2c2f96dcSApple OSS Distributions je 2f 66*2c2f96dcSApple OSS Distributions mov 4(%esp),%ecx 67*2c2f96dcSApple OSS Distributions mov %eax,(%ecx) 68*2c2f96dcSApple OSS Distributions mov %edx,4(%ecx) 69*2c2f96dcSApple OSS Distributions xor %eax,%eax 70*2c2f96dcSApple OSS Distributions2: 71*2c2f96dcSApple OSS Distributions ret 72*2c2f96dcSApple OSS Distributions 73*2c2f96dcSApple OSS Distributions#elif defined(__x86_64__) 74*2c2f96dcSApple OSS Distributions 75*2c2f96dcSApple OSS Distributions__SYSCALL(___gettimeofday_with_mach, gettimeofday, 3) 76*2c2f96dcSApple OSS Distributions 77*2c2f96dcSApple OSS DistributionsLABEL(___gettimeofday) 78*2c2f96dcSApple OSS Distributions movq $0x0, %rdx // zero out third argument 79*2c2f96dcSApple OSS Distributions 80*2c2f96dcSApple OSS Distributions UNIX_SYSCALL_NONAME(gettimeofday,0,cerror_nocancel) 81*2c2f96dcSApple OSS Distributions /* 82*2c2f96dcSApple OSS Distributions * <rdar://problem/26410029> 83*2c2f96dcSApple OSS Distributions * If rax is 0, we're on a new kernel and timeval was written by the kernel. 84*2c2f96dcSApple OSS Distributions * Otherwise, rax:rdx contains the timeval and we marshal into timeval. 85*2c2f96dcSApple OSS Distributions */ 86*2c2f96dcSApple OSS Distributions cmp $0, %rax 87*2c2f96dcSApple OSS Distributions je 2f 88*2c2f96dcSApple OSS Distributions movq %rax, (%rdi) 89*2c2f96dcSApple OSS Distributions movl %edx, 8(%rdi) 90*2c2f96dcSApple OSS Distributions xorl %eax, %eax 91*2c2f96dcSApple OSS Distributions2: 92*2c2f96dcSApple OSS Distributions ret 93*2c2f96dcSApple OSS Distributions 94*2c2f96dcSApple OSS Distributions#elif defined(__arm__) 95*2c2f96dcSApple OSS Distributions 96*2c2f96dcSApple OSS Distributions__SYSCALL2(___gettimeofday_with_mach, gettimeofday, 3, cerror_nocancel) 97*2c2f96dcSApple OSS Distributions 98*2c2f96dcSApple OSS Distributions.text 99*2c2f96dcSApple OSS Distributions.align 2 100*2c2f96dcSApple OSS Distributions.globl ___gettimeofday 101*2c2f96dcSApple OSS Distributions___gettimeofday: 102*2c2f96dcSApple OSS Distributions mov r2, #0x0 103*2c2f96dcSApple OSS Distributions SYSCALL_NONAME(gettimeofday, 3, cerror_nocancel) 104*2c2f96dcSApple OSS Distributions bx lr 105*2c2f96dcSApple OSS Distributions 106*2c2f96dcSApple OSS Distributions#elif defined(__arm64__) 107*2c2f96dcSApple OSS Distributions 108*2c2f96dcSApple OSS Distributions__SYSCALL2(___gettimeofday_with_mach, gettimeofday, 3, cerror_nocancel) 109*2c2f96dcSApple OSS Distributions 110*2c2f96dcSApple OSS Distributions.text 111*2c2f96dcSApple OSS Distributions.align 2 112*2c2f96dcSApple OSS Distributions.globl ___gettimeofday 113*2c2f96dcSApple OSS Distributions___gettimeofday: 114*2c2f96dcSApple OSS Distributions movz x2, #0x0 115*2c2f96dcSApple OSS Distributions SYSCALL_NONAME(gettimeofday, 3, cerror_nocancel) 116*2c2f96dcSApple OSS Distributions ret 117*2c2f96dcSApple OSS Distributions 118*2c2f96dcSApple OSS Distributions#else 119*2c2f96dcSApple OSS Distributions#error Unsupported architecture 120*2c2f96dcSApple OSS Distributions#endif 121