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Diffstat (limited to 'vdso/vdso.cc')
-rw-r--r-- | vdso/vdso.cc | 151 |
1 files changed, 0 insertions, 151 deletions
diff --git a/vdso/vdso.cc b/vdso/vdso.cc deleted file mode 100644 index 8bb80a7a4..000000000 --- a/vdso/vdso.cc +++ /dev/null @@ -1,151 +0,0 @@ -// Copyright 2018 The gVisor Authors. -// -// Licensed under the Apache License, Version 2.0 (the "License"); -// you may not use this file except in compliance with the License. -// You may obtain a copy of the License at -// -// http://www.apache.org/licenses/LICENSE-2.0 -// -// Unless required by applicable law or agreed to in writing, software -// distributed under the License is distributed on an "AS IS" BASIS, -// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. -// See the License for the specific language governing permissions and -// limitations under the License. - -// This is the VDSO for sandboxed binaries. This file just contains the entry -// points to the VDSO. All of the real work is done in vdso_time.cc - -#define _DEFAULT_SOURCE // ensure glibc provides struct timezone. -#include <sys/time.h> -#include <time.h> - -#include "vdso/syscalls.h" -#include "vdso/vdso_time.h" - -namespace vdso { -namespace { - -int __common_clock_gettime(clockid_t clock, struct timespec* ts) { - int ret; - - switch (clock) { - case CLOCK_REALTIME: - ret = ClockRealtime(ts); - break; - - case CLOCK_BOOTTIME: - // Fallthrough, CLOCK_BOOTTIME is an alias for CLOCK_MONOTONIC - case CLOCK_MONOTONIC: - ret = ClockMonotonic(ts); - break; - - default: - ret = sys_clock_gettime(clock, ts); - break; - } - - return ret; -} - -int __common_gettimeofday(struct timeval* tv, struct timezone* tz) { - if (tv) { - struct timespec ts; - int ret = ClockRealtime(&ts); - if (ret) { - return ret; - } - tv->tv_sec = ts.tv_sec; - tv->tv_usec = ts.tv_nsec / 1000; - } - - // Nobody should be calling gettimeofday() with a non-NULL - // timezone pointer. If they do then they will get zeros. - if (tz) { - tz->tz_minuteswest = 0; - tz->tz_dsttime = 0; - } - - return 0; -} -} // namespace - -#if __x86_64__ - -// __vdso_clock_gettime() implements clock_gettime() -extern "C" int __vdso_clock_gettime(clockid_t clock, struct timespec* ts) { - return __common_clock_gettime(clock, ts); -} -extern "C" int clock_gettime(clockid_t clock, struct timespec* ts) - __attribute__((weak, alias("__vdso_clock_gettime"))); - -// __vdso_gettimeofday() implements gettimeofday() -extern "C" int __vdso_gettimeofday(struct timeval* tv, struct timezone* tz) { - return __common_gettimeofday(tv, tz); -} -extern "C" int gettimeofday(struct timeval* tv, struct timezone* tz) - __attribute__((weak, alias("__vdso_gettimeofday"))); - -// __vdso_time() implements time() -extern "C" time_t __vdso_time(time_t* t) { - struct timespec ts; - ClockRealtime(&ts); - if (t) { - *t = ts.tv_sec; - } - return ts.tv_sec; -} -extern "C" time_t time(time_t* t) __attribute__((weak, alias("__vdso_time"))); - -// __vdso_getcpu() implements getcpu() -extern "C" long __vdso_getcpu(unsigned* cpu, unsigned* node, - struct getcpu_cache* cache) { - // No optimizations yet, just make the real system call. - return sys_getcpu(cpu, node, cache); -} -extern "C" long getcpu(unsigned* cpu, unsigned* node, - struct getcpu_cache* cache) - __attribute__((weak, alias("__vdso_getcpu"))); - -#elif __aarch64__ - -// __kernel_clock_gettime() implements clock_gettime() -extern "C" int __kernel_clock_gettime(clockid_t clock, struct timespec* ts) { - return __common_clock_gettime(clock, ts); -} - -// __kernel_gettimeofday() implements gettimeofday() -extern "C" int __kernel_gettimeofday(struct timeval* tv, struct timezone* tz) { - return __common_gettimeofday(tv, tz); -} - -// __kernel_clock_getres() implements clock_getres() -extern "C" int __kernel_clock_getres(clockid_t clock, struct timespec* res) { - int ret = 0; - - switch (clock) { - case CLOCK_REALTIME: - case CLOCK_MONOTONIC: - case CLOCK_BOOTTIME: { - res->tv_sec = 0; - res->tv_nsec = 1; - break; - } - - default: - ret = sys_clock_getres(clock, res); - break; - } - - return ret; -} - -// __kernel_rt_sigreturn() implements gettimeofday() -extern "C" int __kernel_rt_sigreturn(unsigned long unused) { - // No optimizations yet, just make the real system call. - return sys_rt_sigreturn(); -} - -#else -#error "unsupported architecture" -#endif -} // namespace vdso |