arch/x86/um/shared/sysdep/host_ldt.h

   1 #ifndef __ASM_HOST_LDT_H
   2 #define __ASM_HOST_LDT_H
   3
   4 #include <asm/ldt.h>
   5
   6 #define LDT_entry_a(info) \
   7         ((((info)->base_addr & 0x0000ffff) << 16) | ((info)->limit & 0x0ffff))
   8
   9 #define LDT_entry_b(info) \
  10         (((info)->base_addr & 0xff000000) | \
  11         (((info)->base_addr & 0x00ff0000) >> 16) | \
  12         ((info)->limit & 0xf0000) | \
  13         (((info)->read_exec_only ^ 1) << 9) | \
  14         ((info)->contents << 10) | \
  15         (((info)->seg_not_present ^ 1) << 15) | \
  16         ((info)->seg_32bit << 22) | \
  17         ((info)->limit_in_pages << 23) | \
  18         ((info)->useable << 20) | \
  19         0x7000)
  20
  21 #define _LDT_empty(info) (\
  22         (info)->base_addr       == 0    && \
  23         (info)->limit           == 0    && \
  24         (info)->contents        == 0    && \
  25         (info)->read_exec_only  == 1    && \
  26         (info)->seg_32bit       == 0    && \
  27         (info)->limit_in_pages  == 0    && \
  28         (info)->seg_not_present == 1    && \
  29         (info)->useable         == 0    )
  30
  31 #ifdef CONFIG_X86_64
  32 #define LDT_empty(info) (_LDT_empty(info) && ((info)->lm == 0))
  33 #else
  34 #define LDT_empty(info) (_LDT_empty(info))
  35 #endif
  36
  37 #endif