1*1b191cb5SApple OSS Distributions/* 2*1b191cb5SApple OSS Distributions * Copyright (c) 1999-2016 Apple Inc. All rights reserved. 3*1b191cb5SApple OSS Distributions * 4*1b191cb5SApple OSS Distributions * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ 5*1b191cb5SApple OSS Distributions * 6*1b191cb5SApple OSS Distributions * This file contains Original Code and/or Modifications of Original Code 7*1b191cb5SApple OSS Distributions * as defined in and that are subject to the Apple Public Source License 8*1b191cb5SApple OSS Distributions * Version 2.0 (the 'License'). You may not use this file except in 9*1b191cb5SApple OSS Distributions * compliance with the License. The rights granted to you under the License 10*1b191cb5SApple OSS Distributions * may not be used to create, or enable the creation or redistribution of, 11*1b191cb5SApple OSS Distributions * unlawful or unlicensed copies of an Apple operating system, or to 12*1b191cb5SApple OSS Distributions * circumvent, violate, or enable the circumvention or violation of, any 13*1b191cb5SApple OSS Distributions * terms of an Apple operating system software license agreement. 14*1b191cb5SApple OSS Distributions * 15*1b191cb5SApple OSS Distributions * Please obtain a copy of the License at 16*1b191cb5SApple OSS Distributions * http://www.opensource.apple.com/apsl/ and read it before using this file. 17*1b191cb5SApple OSS Distributions * 18*1b191cb5SApple OSS Distributions * The Original Code and all software distributed under the License are 19*1b191cb5SApple OSS Distributions * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER 20*1b191cb5SApple OSS Distributions * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, 21*1b191cb5SApple OSS Distributions * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, 22*1b191cb5SApple OSS Distributions * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. 23*1b191cb5SApple OSS Distributions * Please see the License for the specific language governing rights and 24*1b191cb5SApple OSS Distributions * limitations under the License. 25*1b191cb5SApple OSS Distributions * 26*1b191cb5SApple OSS Distributions * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ 27*1b191cb5SApple OSS Distributions */ 28*1b191cb5SApple OSS Distributions 29*1b191cb5SApple OSS Distributions#include "SYS.h" 30*1b191cb5SApple OSS Distributions 31*1b191cb5SApple OSS Distributions/* 32*1b191cb5SApple OSS Distributions * A third argument, of type uint64_t*, was added to the gettimeofday syscall 33*1b191cb5SApple OSS Distributions * for use cases that also want to know the mach_absolute_time that matches the 34*1b191cb5SApple OSS Distributions * time value returned. 35*1b191cb5SApple OSS Distributions * 36*1b191cb5SApple OSS Distributions * __gettimeofday takes the traditional two arguments. It will zero out the 37*1b191cb5SApple OSS Distributions * third argument argument before entering the kernel, behaving like the old 38*1b191cb5SApple OSS Distributions * call. 39*1b191cb5SApple OSS Distributions * 40*1b191cb5SApple OSS Distributions * __gettimeofday_with_mach will pass it through and supporting kernels will 41*1b191cb5SApple OSS Distributions * copy-out the mach_absolute_time. Old kernels will leave the pointed to 42*1b191cb5SApple OSS Distributions * value alone. 43*1b191cb5SApple OSS Distributions */ 44*1b191cb5SApple OSS Distributions 45*1b191cb5SApple OSS Distributions.private_extern ___gettimeofday_with_mach 46*1b191cb5SApple OSS Distributions 47*1b191cb5SApple OSS Distributions#if defined(__i386__) 48*1b191cb5SApple OSS Distributions 49*1b191cb5SApple OSS DistributionsLABEL(___gettimeofday) 50*1b191cb5SApple OSS Distributions pushl $0 51*1b191cb5SApple OSS Distributions pushl 12(%esp) 52*1b191cb5SApple OSS Distributions pushl 12(%esp) 53*1b191cb5SApple OSS Distributions calll ___gettimeofday_with_mach 54*1b191cb5SApple OSS Distributions addl $12, %esp 55*1b191cb5SApple OSS Distributions ret 56*1b191cb5SApple OSS Distributions 57*1b191cb5SApple OSS DistributionsLABEL(___gettimeofday_with_mach) 58*1b191cb5SApple OSS Distributions UNIX_SYSCALL_INT_NONAME(gettimeofday,0) 59*1b191cb5SApple OSS Distributions /* 60*1b191cb5SApple OSS Distributions * <rdar://problem/26410029> 61*1b191cb5SApple OSS Distributions * If eax is 0, we're on a new kernel and timeval was written by the kernel. 62*1b191cb5SApple OSS Distributions * Otherwise, eax:edx contains the timeval and we marshal into timeval. 63*1b191cb5SApple OSS Distributions */ 64*1b191cb5SApple OSS Distributions cmp $0, %eax 65*1b191cb5SApple OSS Distributions je 2f 66*1b191cb5SApple OSS Distributions mov 4(%esp),%ecx 67*1b191cb5SApple OSS Distributions mov %eax,(%ecx) 68*1b191cb5SApple OSS Distributions mov %edx,4(%ecx) 69*1b191cb5SApple OSS Distributions xor %eax,%eax 70*1b191cb5SApple OSS Distributions2: 71*1b191cb5SApple OSS Distributions ret 72*1b191cb5SApple OSS Distributions 73*1b191cb5SApple OSS Distributions#elif defined(__x86_64__) 74*1b191cb5SApple OSS Distributions 75*1b191cb5SApple OSS Distributions__SYSCALL(___gettimeofday_with_mach, gettimeofday, 3) 76*1b191cb5SApple OSS Distributions 77*1b191cb5SApple OSS DistributionsLABEL(___gettimeofday) 78*1b191cb5SApple OSS Distributions movq $0x0, %rdx // zero out third argument 79*1b191cb5SApple OSS Distributions 80*1b191cb5SApple OSS Distributions UNIX_SYSCALL_NONAME(gettimeofday,0,cerror_nocancel) 81*1b191cb5SApple OSS Distributions /* 82*1b191cb5SApple OSS Distributions * <rdar://problem/26410029> 83*1b191cb5SApple OSS Distributions * If rax is 0, we're on a new kernel and timeval was written by the kernel. 84*1b191cb5SApple OSS Distributions * Otherwise, rax:rdx contains the timeval and we marshal into timeval. 85*1b191cb5SApple OSS Distributions */ 86*1b191cb5SApple OSS Distributions cmp $0, %rax 87*1b191cb5SApple OSS Distributions je 2f 88*1b191cb5SApple OSS Distributions movq %rax, (%rdi) 89*1b191cb5SApple OSS Distributions movl %edx, 8(%rdi) 90*1b191cb5SApple OSS Distributions xorl %eax, %eax 91*1b191cb5SApple OSS Distributions2: 92*1b191cb5SApple OSS Distributions ret 93*1b191cb5SApple OSS Distributions 94*1b191cb5SApple OSS Distributions#elif defined(__arm__) 95*1b191cb5SApple OSS Distributions 96*1b191cb5SApple OSS Distributions__SYSCALL2(___gettimeofday_with_mach, gettimeofday, 3, cerror_nocancel) 97*1b191cb5SApple OSS Distributions 98*1b191cb5SApple OSS Distributions.text 99*1b191cb5SApple OSS Distributions.align 2 100*1b191cb5SApple OSS Distributions.globl ___gettimeofday 101*1b191cb5SApple OSS Distributions___gettimeofday: 102*1b191cb5SApple OSS Distributions mov r2, #0x0 103*1b191cb5SApple OSS Distributions SYSCALL_NONAME(gettimeofday, 3, cerror_nocancel) 104*1b191cb5SApple OSS Distributions bx lr 105*1b191cb5SApple OSS Distributions 106*1b191cb5SApple OSS Distributions#elif defined(__arm64__) 107*1b191cb5SApple OSS Distributions 108*1b191cb5SApple OSS Distributions__SYSCALL2(___gettimeofday_with_mach, gettimeofday, 3, cerror_nocancel) 109*1b191cb5SApple OSS Distributions 110*1b191cb5SApple OSS Distributions.text 111*1b191cb5SApple OSS Distributions.align 2 112*1b191cb5SApple OSS Distributions.globl ___gettimeofday 113*1b191cb5SApple OSS Distributions___gettimeofday: 114*1b191cb5SApple OSS Distributions movz x2, #0x0 115*1b191cb5SApple OSS Distributions SYSCALL_NONAME(gettimeofday, 3, cerror_nocancel) 116*1b191cb5SApple OSS Distributions ret 117*1b191cb5SApple OSS Distributions 118*1b191cb5SApple OSS Distributions#else 119*1b191cb5SApple OSS Distributions#error Unsupported architecture 120*1b191cb5SApple OSS Distributions#endif 121