[mirror_ubuntu-focal-kernel.git] / arch / x86 / kernel / vsyscall_emu_64.S

/*
 * vsyscall_emu_64.S: Vsyscall emulation page
 *
 * Copyright (c) 2011 Andy Lutomirski
 *
 * Subject to the GNU General Public License, version 2
 */

#include <linux/linkage.h>

#include <asm/irq_vectors.h>
#include <asm/page_types.h>
#include <asm/unistd_64.h>

__PAGE_ALIGNED_DATA
	.globl __vsyscall_page
	.balign PAGE_SIZE, 0xcc
	.type __vsyscall_page, @object
__vsyscall_page:

	mov $__NR_gettimeofday, %rax
	syscall
	ret

	.balign 1024, 0xcc
	mov $__NR_time, %rax
	syscall
	ret

	.balign 1024, 0xcc
	mov $__NR_getcpu, %rax
	syscall
	ret

	.balign 4096, 0xcc

	.size __vsyscall_page, 4096
Commit	Line	Data
5cec93c2 AL	1	/*
	2	* vsyscall_emu_64.S: Vsyscall emulation page
	3	*
	4	* Copyright (c) 2011 Andy Lutomirski
	5	*
	6	* Subject to the GNU General Public License, version 2
	7	*/
	8
	9	#include <linux/linkage.h>
3ae36655	10
5cec93c2	11	#include <asm/irq_vectors.h>
3ae36655 AL	12	#include <asm/page_types.h>
	13	#include <asm/unistd_64.h>
	14
	15	__PAGE_ALIGNED_DATA
	16	.globl __vsyscall_page
	17	.balign PAGE_SIZE, 0xcc
	18	.type __vsyscall_page, @object
	19	__vsyscall_page:
	20
	21	mov $__NR_gettimeofday, %rax
	22	syscall
	23	ret
5cec93c2	24
3ae36655 AL	25	.balign 1024, 0xcc
	26	mov $__NR_time, %rax
	27	syscall
	28	ret
5cec93c2	29
3ae36655 AL	30	.balign 1024, 0xcc
	31	mov $__NR_getcpu, %rax
	32	syscall
	33	ret
5cec93c2	34
3ae36655	35	.balign 4096, 0xcc
5cec93c2	36
3ae36655	37	.size __vsyscall_page, 4096