headers/private/kernel/util/syscall_args.h

   1 // syscall_args.h
   2
   3 #ifndef _SYSCALL_ARGS_H
   4 #define _SYSCALL_ARGS_H
   5
   6 #include <kernel.h>
   7
   8
   9 // Hack to be able to use the IS_USER_ADDRESS macro when compiling for R5.
  10 #ifdef R5_MEMORY_LAYOUT
  11 #       undef KERNEL_BASE
  12 #       define KERNEL_BASE 0x0
  13 #endif
  14
  15 // copy_ref_var_from_user
  16 template<typename T>
  17 inline
  18 status_t
  19 copy_ref_var_from_user(T *user, T &kernel)
  20 {
  21         if (!IS_USER_ADDRESS(user))
  22                 return B_BAD_ADDRESS;
  23         return user_memcpy(&kernel, user, sizeof(T));
  24 }
  25
  26 // copy_ref_var_to_user
  27 template<typename T>
  28 inline
  29 status_t
  30 copy_ref_var_to_user(T &kernel, T *user)
  31 {
  32         if (!IS_USER_ADDRESS(user))
  33                 return B_BAD_ADDRESS;
  34         return user_memcpy(user, &kernel, sizeof(T));
  35 }
  36
  37
  38 #endif  // _SYSCALL_ARGS_H