1*c54f35caSApple OSS Distributions/* 2*c54f35caSApple OSS Distributions * Copyright (c) 1999-2016 Apple Inc. All rights reserved. 3*c54f35caSApple OSS Distributions * 4*c54f35caSApple OSS Distributions * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ 5*c54f35caSApple OSS Distributions * 6*c54f35caSApple OSS Distributions * This file contains Original Code and/or Modifications of Original Code 7*c54f35caSApple OSS Distributions * as defined in and that are subject to the Apple Public Source License 8*c54f35caSApple OSS Distributions * Version 2.0 (the 'License'). You may not use this file except in 9*c54f35caSApple OSS Distributions * compliance with the License. The rights granted to you under the License 10*c54f35caSApple OSS Distributions * may not be used to create, or enable the creation or redistribution of, 11*c54f35caSApple OSS Distributions * unlawful or unlicensed copies of an Apple operating system, or to 12*c54f35caSApple OSS Distributions * circumvent, violate, or enable the circumvention or violation of, any 13*c54f35caSApple OSS Distributions * terms of an Apple operating system software license agreement. 14*c54f35caSApple OSS Distributions * 15*c54f35caSApple OSS Distributions * Please obtain a copy of the License at 16*c54f35caSApple OSS Distributions * http://www.opensource.apple.com/apsl/ and read it before using this file. 17*c54f35caSApple OSS Distributions * 18*c54f35caSApple OSS Distributions * The Original Code and all software distributed under the License are 19*c54f35caSApple OSS Distributions * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER 20*c54f35caSApple OSS Distributions * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, 21*c54f35caSApple OSS Distributions * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, 22*c54f35caSApple OSS Distributions * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. 23*c54f35caSApple OSS Distributions * Please see the License for the specific language governing rights and 24*c54f35caSApple OSS Distributions * limitations under the License. 25*c54f35caSApple OSS Distributions * 26*c54f35caSApple OSS Distributions * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ 27*c54f35caSApple OSS Distributions */ 28*c54f35caSApple OSS Distributions 29*c54f35caSApple OSS Distributions#include "SYS.h" 30*c54f35caSApple OSS Distributions 31*c54f35caSApple OSS Distributions/* 32*c54f35caSApple OSS Distributions * A third argument, of type uint64_t*, was added to the gettimeofday syscall 33*c54f35caSApple OSS Distributions * for use cases that also want to know the mach_absolute_time that matches the 34*c54f35caSApple OSS Distributions * time value returned. 35*c54f35caSApple OSS Distributions * 36*c54f35caSApple OSS Distributions * __gettimeofday takes the traditional two arguments. It will zero out the 37*c54f35caSApple OSS Distributions * third argument argument before entering the kernel, behaving like the old 38*c54f35caSApple OSS Distributions * call. 39*c54f35caSApple OSS Distributions * 40*c54f35caSApple OSS Distributions * __gettimeofday_with_mach will pass it through and supporting kernels will 41*c54f35caSApple OSS Distributions * copy-out the mach_absolute_time. Old kernels will leave the pointed to 42*c54f35caSApple OSS Distributions * value alone. 43*c54f35caSApple OSS Distributions */ 44*c54f35caSApple OSS Distributions 45*c54f35caSApple OSS Distributions.private_extern ___gettimeofday_with_mach 46*c54f35caSApple OSS Distributions 47*c54f35caSApple OSS Distributions#if defined(__i386__) 48*c54f35caSApple OSS Distributions 49*c54f35caSApple OSS DistributionsLABEL(___gettimeofday) 50*c54f35caSApple OSS Distributions pushl $0 51*c54f35caSApple OSS Distributions pushl 12(%esp) 52*c54f35caSApple OSS Distributions pushl 12(%esp) 53*c54f35caSApple OSS Distributions calll ___gettimeofday_with_mach 54*c54f35caSApple OSS Distributions addl $12, %esp 55*c54f35caSApple OSS Distributions ret 56*c54f35caSApple OSS Distributions 57*c54f35caSApple OSS DistributionsLABEL(___gettimeofday_with_mach) 58*c54f35caSApple OSS Distributions UNIX_SYSCALL_INT_NONAME(gettimeofday,0) 59*c54f35caSApple OSS Distributions /* 60*c54f35caSApple OSS Distributions * <rdar://problem/26410029> 61*c54f35caSApple OSS Distributions * If eax is 0, we're on a new kernel and timeval was written by the kernel. 62*c54f35caSApple OSS Distributions * Otherwise, eax:edx contains the timeval and we marshal into timeval. 63*c54f35caSApple OSS Distributions */ 64*c54f35caSApple OSS Distributions cmp $0, %eax 65*c54f35caSApple OSS Distributions je 2f 66*c54f35caSApple OSS Distributions mov 4(%esp),%ecx 67*c54f35caSApple OSS Distributions mov %eax,(%ecx) 68*c54f35caSApple OSS Distributions mov %edx,4(%ecx) 69*c54f35caSApple OSS Distributions xor %eax,%eax 70*c54f35caSApple OSS Distributions2: 71*c54f35caSApple OSS Distributions ret 72*c54f35caSApple OSS Distributions 73*c54f35caSApple OSS Distributions#elif defined(__x86_64__) 74*c54f35caSApple OSS Distributions 75*c54f35caSApple OSS Distributions__SYSCALL(___gettimeofday_with_mach, gettimeofday, 3) 76*c54f35caSApple OSS Distributions 77*c54f35caSApple OSS DistributionsLABEL(___gettimeofday) 78*c54f35caSApple OSS Distributions movq $0x0, %rdx // zero out third argument 79*c54f35caSApple OSS Distributions 80*c54f35caSApple OSS Distributions UNIX_SYSCALL_NONAME(gettimeofday,0,cerror_nocancel) 81*c54f35caSApple OSS Distributions /* 82*c54f35caSApple OSS Distributions * <rdar://problem/26410029> 83*c54f35caSApple OSS Distributions * If rax is 0, we're on a new kernel and timeval was written by the kernel. 84*c54f35caSApple OSS Distributions * Otherwise, rax:rdx contains the timeval and we marshal into timeval. 85*c54f35caSApple OSS Distributions */ 86*c54f35caSApple OSS Distributions cmp $0, %rax 87*c54f35caSApple OSS Distributions je 2f 88*c54f35caSApple OSS Distributions movq %rax, (%rdi) 89*c54f35caSApple OSS Distributions movl %edx, 8(%rdi) 90*c54f35caSApple OSS Distributions xorl %eax, %eax 91*c54f35caSApple OSS Distributions2: 92*c54f35caSApple OSS Distributions ret 93*c54f35caSApple OSS Distributions 94*c54f35caSApple OSS Distributions#elif defined(__arm__) 95*c54f35caSApple OSS Distributions 96*c54f35caSApple OSS Distributions__SYSCALL2(___gettimeofday_with_mach, gettimeofday, 3, cerror_nocancel) 97*c54f35caSApple OSS Distributions 98*c54f35caSApple OSS Distributions.text 99*c54f35caSApple OSS Distributions.align 2 100*c54f35caSApple OSS Distributions.globl ___gettimeofday 101*c54f35caSApple OSS Distributions___gettimeofday: 102*c54f35caSApple OSS Distributions mov r2, #0x0 103*c54f35caSApple OSS Distributions SYSCALL_NONAME(gettimeofday, 3, cerror_nocancel) 104*c54f35caSApple OSS Distributions bx lr 105*c54f35caSApple OSS Distributions 106*c54f35caSApple OSS Distributions#elif defined(__arm64__) 107*c54f35caSApple OSS Distributions 108*c54f35caSApple OSS Distributions__SYSCALL2(___gettimeofday_with_mach, gettimeofday, 3, cerror_nocancel) 109*c54f35caSApple OSS Distributions 110*c54f35caSApple OSS Distributions.text 111*c54f35caSApple OSS Distributions.align 2 112*c54f35caSApple OSS Distributions.globl ___gettimeofday 113*c54f35caSApple OSS Distributions___gettimeofday: 114*c54f35caSApple OSS Distributions movz x2, #0x0 115*c54f35caSApple OSS Distributions SYSCALL_NONAME(gettimeofday, 3, cerror_nocancel) 116*c54f35caSApple OSS Distributions ret 117*c54f35caSApple OSS Distributions 118*c54f35caSApple OSS Distributions#else 119*c54f35caSApple OSS Distributions#error Unsupported architecture 120*c54f35caSApple OSS Distributions#endif 121