LXR linux/arch/x86/include/asm/vsyscall.h

   1#ifndef _ASM_X86_VSYSCALL_H
   2#define _ASM_X86_VSYSCALL_H
   3
   4enum vsyscall_num {
   5        __NR_vgettimeofday,
   6        __NR_vtime,
   7        __NR_vgetcpu,
   8};
   9
  10#define VSYSCALL_START (-10UL << 20)
  11#define VSYSCALL_SIZE 1024
  12#define VSYSCALL_END (-2UL << 20)
  13#define VSYSCALL_MAPPED_PAGES 1
  14#define VSYSCALL_ADDR(vsyscall_nr) (VSYSCALL_START+VSYSCALL_SIZE*(vsyscall_nr))
  15
  16#ifdef __KERNEL__
  17#include <linux/seqlock.h>
  18
  19#define __section_vgetcpu_mode __attribute__ ((unused, __section__ (".vgetcpu_mode"), aligned(16)))
  20#define __section_jiffies __attribute__ ((unused, __section__ (".jiffies"), aligned(16)))
  21
  22/* Definitions for CONFIG_GENERIC_TIME definitions */
  23#define __section_vsyscall_gtod_data __attribute__ \
  24        ((unused, __section__ (".vsyscall_gtod_data"),aligned(16)))
  25#define __section_vsyscall_clock __attribute__ \
  26        ((unused, __section__ (".vsyscall_clock"),aligned(16)))
  27#define __vsyscall_fn \
  28        __attribute__ ((unused, __section__(".vsyscall_fn"))) notrace
  29
  30#define VGETCPU_RDTSCP  1
  31#define VGETCPU_LSL     2
  32
  33extern int __vgetcpu_mode;
  34extern volatile unsigned long __jiffies;
  35
  36/* kernel space (writeable) */
  37extern int vgetcpu_mode;
  38extern struct timezone sys_tz;
  39
  40extern void map_vsyscall(void);
  41
  42#endif /* __KERNEL__ */
  43
  44#endif /* _ASM_X86_VSYSCALL_H */
  45