mirror of
https://github.com/jart/cosmopolitan.git
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d44ff6ce1f
- Implement openpty() - Add `--assimilate` flag to APE bootloader - Restore Linux vDSO clock_gettime() support - Use `$(APE_NO_MODIFY_SELF)` on more programs
69 lines
3.2 KiB
C
69 lines
3.2 KiB
C
/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
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│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi│
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╞══════════════════════════════════════════════════════════════════════════════╡
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│ Copyright 2020 Justine Alexandra Roberts Tunney │
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│ │
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│ Permission to use, copy, modify, and/or distribute this software for │
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│ any purpose with or without fee is hereby granted, provided that the │
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│ above copyright notice and this permission notice appear in all copies. │
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│ │
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│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL │
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│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED │
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│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE │
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│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL │
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│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR │
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│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER │
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│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
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│ PERFORMANCE OF THIS SOFTWARE. │
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╚─────────────────────────────────────────────────────────────────────────────*/
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#include "libc/assert.h"
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#include "libc/calls/internal.h"
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#include "libc/calls/struct/timeval.h"
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#include "libc/calls/syscall_support-sysv.internal.h"
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#include "libc/dce.h"
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#include "libc/intrin/asan.internal.h"
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#include "libc/sysv/errfuns.h"
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#include "libc/time/struct/timezone.h"
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#include "libc/time/time.h"
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static typeof(sys_gettimeofday) *__gettimeofday = sys_gettimeofday;
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/**
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* Returns system wall time in microseconds.
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*
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* @param tv points to timeval that receives result if non-NULL
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* @param tz receives UTC timezone if non-NULL
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* @see clock_gettime() for nanosecond precision
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* @see strftime() for string formatting
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*/
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int gettimeofday(struct timeval *tv, struct timezone *tz) {
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axdx_t ad;
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if (IsAsan() && ((tv && !__asan_is_valid(tv, sizeof(*tv))) ||
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(tz && !__asan_is_valid(tz, sizeof(*tz))))) {
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return efault();
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}
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if (!IsWindows() && !IsMetal()) {
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ad = __gettimeofday(tv, tz, NULL);
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assert(ad.ax != -1);
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if (SupportsXnu() && ad.ax && tv) {
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tv->tv_sec = ad.ax;
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tv->tv_usec = ad.dx;
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}
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return 0;
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} else if (IsMetal()) {
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return enosys();
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} else {
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return sys_gettimeofday_nt(tv, tz);
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}
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}
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static textstartup void __gettimeofday_init(void) {
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void *vdso;
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if ((vdso = __vdsosym("LINUX_2.6", "__vdso_gettimeofday"))) {
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__gettimeofday = vdso;
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}
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}
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const void *const __gettimeofday_ctor[] initarray = {
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__gettimeofday_init,
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};
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