1*94d3b452SApple OSS Distributions/* 2*94d3b452SApple OSS Distributions * Copyright (c) 1999-2016 Apple Inc. All rights reserved. 3*94d3b452SApple OSS Distributions * 4*94d3b452SApple OSS Distributions * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ 5*94d3b452SApple OSS Distributions * 6*94d3b452SApple OSS Distributions * This file contains Original Code and/or Modifications of Original Code 7*94d3b452SApple OSS Distributions * as defined in and that are subject to the Apple Public Source License 8*94d3b452SApple OSS Distributions * Version 2.0 (the 'License'). You may not use this file except in 9*94d3b452SApple OSS Distributions * compliance with the License. The rights granted to you under the License 10*94d3b452SApple OSS Distributions * may not be used to create, or enable the creation or redistribution of, 11*94d3b452SApple OSS Distributions * unlawful or unlicensed copies of an Apple operating system, or to 12*94d3b452SApple OSS Distributions * circumvent, violate, or enable the circumvention or violation of, any 13*94d3b452SApple OSS Distributions * terms of an Apple operating system software license agreement. 14*94d3b452SApple OSS Distributions * 15*94d3b452SApple OSS Distributions * Please obtain a copy of the License at 16*94d3b452SApple OSS Distributions * http://www.opensource.apple.com/apsl/ and read it before using this file. 17*94d3b452SApple OSS Distributions * 18*94d3b452SApple OSS Distributions * The Original Code and all software distributed under the License are 19*94d3b452SApple OSS Distributions * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER 20*94d3b452SApple OSS Distributions * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, 21*94d3b452SApple OSS Distributions * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, 22*94d3b452SApple OSS Distributions * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. 23*94d3b452SApple OSS Distributions * Please see the License for the specific language governing rights and 24*94d3b452SApple OSS Distributions * limitations under the License. 25*94d3b452SApple OSS Distributions * 26*94d3b452SApple OSS Distributions * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ 27*94d3b452SApple OSS Distributions */ 28*94d3b452SApple OSS Distributions 29*94d3b452SApple OSS Distributions#include "SYS.h" 30*94d3b452SApple OSS Distributions 31*94d3b452SApple OSS Distributions/* 32*94d3b452SApple OSS Distributions * A third argument, of type uint64_t*, was added to the gettimeofday syscall 33*94d3b452SApple OSS Distributions * for use cases that also want to know the mach_absolute_time that matches the 34*94d3b452SApple OSS Distributions * time value returned. 35*94d3b452SApple OSS Distributions * 36*94d3b452SApple OSS Distributions * __gettimeofday takes the traditional two arguments. It will zero out the 37*94d3b452SApple OSS Distributions * third argument argument before entering the kernel, behaving like the old 38*94d3b452SApple OSS Distributions * call. 39*94d3b452SApple OSS Distributions * 40*94d3b452SApple OSS Distributions * __gettimeofday_with_mach will pass it through and supporting kernels will 41*94d3b452SApple OSS Distributions * copy-out the mach_absolute_time. Old kernels will leave the pointed to 42*94d3b452SApple OSS Distributions * value alone. 43*94d3b452SApple OSS Distributions */ 44*94d3b452SApple OSS Distributions 45*94d3b452SApple OSS Distributions.private_extern ___gettimeofday_with_mach 46*94d3b452SApple OSS Distributions 47*94d3b452SApple OSS Distributions#if defined(__i386__) 48*94d3b452SApple OSS Distributions 49*94d3b452SApple OSS DistributionsLABEL(___gettimeofday) 50*94d3b452SApple OSS Distributions pushl $0 51*94d3b452SApple OSS Distributions pushl 12(%esp) 52*94d3b452SApple OSS Distributions pushl 12(%esp) 53*94d3b452SApple OSS Distributions calll ___gettimeofday_with_mach 54*94d3b452SApple OSS Distributions addl $12, %esp 55*94d3b452SApple OSS Distributions ret 56*94d3b452SApple OSS Distributions 57*94d3b452SApple OSS DistributionsLABEL(___gettimeofday_with_mach) 58*94d3b452SApple OSS Distributions UNIX_SYSCALL_INT_NONAME(gettimeofday,0) 59*94d3b452SApple OSS Distributions /* 60*94d3b452SApple OSS Distributions * <rdar://problem/26410029> 61*94d3b452SApple OSS Distributions * If eax is 0, we're on a new kernel and timeval was written by the kernel. 62*94d3b452SApple OSS Distributions * Otherwise, eax:edx contains the timeval and we marshal into timeval. 63*94d3b452SApple OSS Distributions */ 64*94d3b452SApple OSS Distributions cmp $0, %eax 65*94d3b452SApple OSS Distributions je 2f 66*94d3b452SApple OSS Distributions mov 4(%esp),%ecx 67*94d3b452SApple OSS Distributions mov %eax,(%ecx) 68*94d3b452SApple OSS Distributions mov %edx,4(%ecx) 69*94d3b452SApple OSS Distributions xor %eax,%eax 70*94d3b452SApple OSS Distributions2: 71*94d3b452SApple OSS Distributions ret 72*94d3b452SApple OSS Distributions 73*94d3b452SApple OSS Distributions#elif defined(__x86_64__) 74*94d3b452SApple OSS Distributions 75*94d3b452SApple OSS Distributions__SYSCALL(___gettimeofday_with_mach, gettimeofday, 3) 76*94d3b452SApple OSS Distributions 77*94d3b452SApple OSS DistributionsLABEL(___gettimeofday) 78*94d3b452SApple OSS Distributions movq $0x0, %rdx // zero out third argument 79*94d3b452SApple OSS Distributions 80*94d3b452SApple OSS Distributions UNIX_SYSCALL_NONAME(gettimeofday,0,cerror_nocancel) 81*94d3b452SApple OSS Distributions /* 82*94d3b452SApple OSS Distributions * <rdar://problem/26410029> 83*94d3b452SApple OSS Distributions * If rax is 0, we're on a new kernel and timeval was written by the kernel. 84*94d3b452SApple OSS Distributions * Otherwise, rax:rdx contains the timeval and we marshal into timeval. 85*94d3b452SApple OSS Distributions */ 86*94d3b452SApple OSS Distributions cmp $0, %rax 87*94d3b452SApple OSS Distributions je 2f 88*94d3b452SApple OSS Distributions movq %rax, (%rdi) 89*94d3b452SApple OSS Distributions movl %edx, 8(%rdi) 90*94d3b452SApple OSS Distributions xorl %eax, %eax 91*94d3b452SApple OSS Distributions2: 92*94d3b452SApple OSS Distributions ret 93*94d3b452SApple OSS Distributions 94*94d3b452SApple OSS Distributions#elif defined(__arm__) 95*94d3b452SApple OSS Distributions 96*94d3b452SApple OSS Distributions__SYSCALL2(___gettimeofday_with_mach, gettimeofday, 3, cerror_nocancel) 97*94d3b452SApple OSS Distributions 98*94d3b452SApple OSS Distributions.text 99*94d3b452SApple OSS Distributions.align 2 100*94d3b452SApple OSS Distributions.globl ___gettimeofday 101*94d3b452SApple OSS Distributions___gettimeofday: 102*94d3b452SApple OSS Distributions mov r2, #0x0 103*94d3b452SApple OSS Distributions SYSCALL_NONAME(gettimeofday, 3, cerror_nocancel) 104*94d3b452SApple OSS Distributions bx lr 105*94d3b452SApple OSS Distributions 106*94d3b452SApple OSS Distributions#elif defined(__arm64__) 107*94d3b452SApple OSS Distributions 108*94d3b452SApple OSS Distributions__SYSCALL2(___gettimeofday_with_mach, gettimeofday, 3, cerror_nocancel) 109*94d3b452SApple OSS Distributions 110*94d3b452SApple OSS Distributions.text 111*94d3b452SApple OSS Distributions.align 2 112*94d3b452SApple OSS Distributions.globl ___gettimeofday 113*94d3b452SApple OSS Distributions___gettimeofday: 114*94d3b452SApple OSS Distributions movz x2, #0x0 115*94d3b452SApple OSS Distributions SYSCALL_NONAME(gettimeofday, 3, cerror_nocancel) 116*94d3b452SApple OSS Distributions ret 117*94d3b452SApple OSS Distributions 118*94d3b452SApple OSS Distributions#else 119*94d3b452SApple OSS Distributions#error Unsupported architecture 120*94d3b452SApple OSS Distributions#endif 121