arch/um/os-Linux/util/mk_user_constants.c

   1 #include <stdio.h>
   2 #include <asm/types.h>
   3 /* For some reason, x86_64 nowhere defines u64 and u32, even though they're
   4  * used throughout the headers.
   5  */
   6 typedef __u64 u64;
   7 typedef __u32 u32;
   8 #include <asm/user.h>
   9
  10 int main(int argc, char **argv)
  11 {
  12   printf("/*\n");
  13   printf(" * Generated by mk_user_constants\n");
  14   printf(" */\n");
  15   printf("\n");
  16   printf("#ifndef __UM_USER_CONSTANTS_H\n");
  17   printf("#define __UM_USER_CONSTANTS_H\n");
  18   printf("\n");
  19   /* I'd like to use FRAME_SIZE from ptrace.h here, but that's wrong on
  20    * x86_64 (216 vs 168 bytes).  user_regs_struct is the correct size on
  21    * both x86_64 and i386.
  22    */
  23   printf("#define UM_FRAME_SIZE %d\n", (int) sizeof(struct user_regs_struct));
  24
  25   printf("\n");
  26   printf("#endif\n");
  27
  28   return(0);
  29 }