sys/sys/sysmsg.h

   1 /*
   2  * SYS/SYSMSG.H
   3  *
   4  * $DragonFly: src/sys/sys/sysmsg.h,v 1.11 2006/10/20 17:02:13 dillon Exp $
   5  */
   6
   7 #ifndef _SYS_SYSMSG_H_
   8 #define _SYS_SYSMSG_H_
   9
  10 #ifdef _KERNEL
  11
  12 #ifndef _SYS_TYPES_H_
  13 #include <sys/types.h>
  14 #endif
  15
  16 /*
  17  * The sysmsg holds the kernelland version of a system call's arguments
  18  * and return value.  It typically preceeds the syscall arguments in sysunion
  19  * (see sys/sysunion.h).
  20  */
  21 union sysunion;
  22
  23 struct sysmsg {
  24         union {
  25             void    *resultp;            /* misc pointer data or result */
  26             int     result;              /* standard 'int'eger result */
  27             long    lresult;             /* long result */
  28             int     fds[2];              /* two int bit results */
  29             __int32_t result32;          /* 32 bit result */
  30             __int64_t result64;          /* 64 bit result */
  31             __off_t offset;              /* off_t result */
  32         } sm_result;
  33         struct trapframe *sm_frame;      /* trapframe - saved user context */
  34         void *sm_unused;
  35 };
  36
  37 struct lwp;
  38 union sysunion;
  39
  40 #endif
  41
  42 #ifdef _KERNEL
  43 #define sysmsg_result   sysmsg.sm_result.result
  44 #define sysmsg_lresult  sysmsg.sm_result.lresult
  45 #define sysmsg_resultp  sysmsg.sm_result.resultp
  46 #define sysmsg_fds      sysmsg.sm_result.fds
  47 #define sysmsg_offset   sysmsg.sm_result.offset
  48 #define sysmsg_result32 sysmsg.sm_result.result32
  49 #define sysmsg_result64 sysmsg.sm_result.result64
  50 #define sysmsg_frame    sysmsg.sm_frame
  51 #endif
  52
  53 #endif
  54