root/arch/x86/entry/vsyscall/vsyscall_emu_64.S

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2 /*
   3  * vsyscall_emu_64.S: Vsyscall emulation page
   4  *
   5  * Copyright (c) 2011 Andy Lutomirski
   6  */
   7 
   8 #include <linux/linkage.h>
   9 
  10 #include <asm/irq_vectors.h>
  11 #include <asm/page_types.h>
  12 #include <asm/unistd_64.h>
  13 
  14 __PAGE_ALIGNED_DATA
  15         .globl __vsyscall_page
  16         .balign PAGE_SIZE, 0xcc
  17         .type __vsyscall_page, @object
  18 __vsyscall_page:
  19 
  20         mov $__NR_gettimeofday, %rax
  21         syscall
  22         ret
  23 
  24         .balign 1024, 0xcc
  25         mov $__NR_time, %rax
  26         syscall
  27         ret
  28 
  29         .balign 1024, 0xcc
  30         mov $__NR_getcpu, %rax
  31         syscall
  32         ret
  33 
  34         .balign 4096, 0xcc
  35 
  36         .size __vsyscall_page, 4096