2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
4 * Copyright (c) 2021 Dmitry Chagin <dchagin@FreeBSD.org>
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
28 #include <sys/cdefs.h>
29 __FBSDID("$FreeBSD$");
32 #include <sys/errno.h>
34 #include <sys/stddef.h>
40 #include <machine/atomic.h>
41 #include <machine/stdarg.h>
43 #include <amd64/linux/linux.h>
44 #include <amd64/linux/linux_syscall.h>
45 #include <compat/linux/linux_errno.h>
46 #include <compat/linux/linux_timer.h>
48 /* The kernel fixup this at vDSO install */
49 uintptr_t *kern_timekeep_base = NULL;
50 uint32_t kern_tsc_selector = 0;
52 #include <x86/linux/linux_vdso_gettc_x86.inc>
54 /* for debug purpose */
56 write(int fd, const void *buf, size_t size)
64 : "a"(LINUX_SYS_write), "D"(fd), "S"(buf), "d"(size)
65 : "cc", "rcx", "r11", "memory"
71 __vdso_clock_gettime_fallback(clockid_t clock_id, struct l_timespec *ts)
79 : "a"(LINUX_SYS_linux_clock_gettime), "D"(clock_id), "S"(ts)
80 : "cc", "rcx", "r11", "memory"
86 __vdso_gettimeofday_fallback(l_timeval *tv, struct timezone *tz)
94 : "a"(LINUX_SYS_gettimeofday), "D"(tv), "S"(tz)
95 : "cc", "rcx", "r11", "memory"
101 __vdso_clock_getres_fallback(clockid_t clock_id, struct l_timespec *ts)
109 : "a"(LINUX_SYS_linux_clock_getres), "D"(clock_id), "S"(ts)
110 : "cc", "rcx", "r11", "memory"
116 __vdso_getcpu_fallback(uint32_t *cpu, uint32_t *node, void *cache)
124 : "a"(LINUX_SYS_linux_getcpu), "D"(cpu), "S"(node), "d"(cache)
125 : "cc", "rcx", "r11", "memory"
131 __vdso_time_fallback(long *tm)
139 : "a"(LINUX_SYS_linux_time), "D"(tm)
140 : "cc", "rcx", "r11", "memory"
145 #include <compat/linux/linux_vdso_gtod.inc>