sys/sys/sysmsg.h

   1 /*
   2  * SYS/SYSMSG.H
   3  *
   4  * $DragonFly: src/sys/sys/sysmsg.h,v 1.12 2008/08/25 23:35:47 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  * WARNING: fds must be long so it translates to two 64 bit registers
  22  * on 64 bit architectures.
  23  */
  24 union sysunion;
  25
  26 struct sysmsg {
  27         union {
  28             void    *resultp;           /* misc pointer data or result */
  29             int     result;             /* DEPRECATED - AUDIT -> iresult */
  30             int     iresult;            /* standard 'int'eger result */
  31             long    lresult;            /* long result */
  32             size_t  szresult;           /* size_t result */
  33             long    fds[2];             /* double result */
  34             __int32_t result32;         /* 32 bit result */
  35             __int64_t result64;         /* 64 bit result */
  36             __off_t offset;             /* off_t result */
  37             register_t reg;
  38         } sm_result;
  39         struct trapframe *sm_frame;      /* trapframe - saved user context */
  40         void *sm_unused;
  41 };
  42
  43 struct lwp;
  44 union sysunion;
  45
  46 #endif
  47
  48 #ifdef _KERNEL
  49 #define sysmsg_result   sysmsg.sm_result.result
  50 #define sysmsg_iresult  sysmsg.sm_result.iresult
  51 #define sysmsg_lresult  sysmsg.sm_result.lresult
  52 #define sysmsg_szresult sysmsg.sm_result.szresult
  53 #define sysmsg_resultp  sysmsg.sm_result.resultp
  54 #define sysmsg_fds      sysmsg.sm_result.fds
  55 #define sysmsg_offset   sysmsg.sm_result.offset
  56 #define sysmsg_result32 sysmsg.sm_result.result32
  57 #define sysmsg_result64 sysmsg.sm_result.result64
  58 #define sysmsg_reg      sysmsg.sm_result.reg
  59 #define sysmsg_frame    sysmsg.sm_frame
  60 #endif
  61
  62 #endif
  63