arch/x86/kernel/vsyscall_emu_64.S

   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>
  10
  11 #include <asm/irq_vectors.h>
  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
  24
  25         .balign 1024, 0xcc
  26         mov $__NR_time, %rax
  27         syscall
  28         ret
  29
  30         .balign 1024, 0xcc
  31         mov $__NR_getcpu, %rax
  32         syscall
  33         ret
  34
  35         .balign 4096, 0xcc
  36
  37         .size __vsyscall_page, 4096