freebsd-dev/sys/arm64/linux/linux_locore.asm
Andrew Turner eb43a03acb Implement the Linux/arm64 VDSO gettimeofday and clock_gettime
These are used by Centos 7 and will be needed for the
emulators/linux_base-c7 port.

Sponsored by:	DARPA, AFRL
2020-02-08 13:35:56 +00:00

64 lines
2.0 KiB
NASM

/*-
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
*
* Copyright (C) 2018 Turing Robotic Industries Inc.
* Copyright (C) 2020 Andrew Turner <andrew@FreeBSD.org>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $FreeBSD$
*/
/*
* arm64 Linux VDSO implementation.
*/
#include <machine/asm.h>
#include <arm64/linux/linux_syscall.h>
.data
.globl linux_platform
linux_platform:
.asciz "arm64"
.text
ENTRY(__kernel_rt_sigreturn)
brk #0 /* LINUXTODO: implement __kernel_rt_sigreturn */
ret
ENTRY(__kernel_gettimeofday)
ldr x8, =LINUX_SYS_gettimeofday
svc #0
ret
ENTRY(__kernel_clock_gettime)
ldr x8, =LINUX_SYS_linux_clock_gettime
svc #0
ret
ENTRY(__kernel_clock_getres)
brk #0 /* LINUXTODO: implement __kernel_clock_getres */
ret