test/sysmsg/syscall.h

   1 /*
   2  * Copyright (c) 2004 Eirik Nygaard.  All rights reserved.
   3  *
   4  * Redistribution and use in source and binary forms, with or without
   5  * modification, are permitted provided that the following conditions
   6  * are met:
   7  * 1. Redistributions of source code must retain the above copyright
   8  *    notice, this list of conditions and the following disclaimer.
   9  * 2. Redistributions in binary form must reproduce the above copyright
  10  *    notice, this list of conditions and the following disclaimer in the
  11  *    documentation and/or other materials provided with the distribution.
  12  * 3. Neither the name of The DragonFly Project nor the names of its
  13  *    contributors may be used to endorse or promote products derived
  14  *    from this software without specific, prior written permission.
  15  *
  16  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  17  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  18  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
  19  * FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE
  20  * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
  21  * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING,
  22  * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  23  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
  24  * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
  25  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
  26  * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  27  * SUCH DAMAGE.
  28  *
  29  * $DragonFly: src/test/sysmsg/syscall.h,v 1.1 2004/09/02 11:21:12 eirikn Exp $
  30  */
  31
  32 /* XXX: eirik */
  33 #define _MMAP_DECLARED
  34 #define _LSEEK_DECLARED
  35 #define _TRUNCATE_DECLARED
  36 #define _FTRUNCATE_DECLARED
  37
  38 #define __syscall_args nosys_args
  39
  40 #include <sys/types.h>
  41 #include <sys/msgport.h>
  42 #include <sys/syscall.h>
  43 #include <sys/sysproto.h>
  44
  45 #include <stdlib.h>
  46 #include <errno.h>
  47
  48 #define INITMSGSYSCALL(name, flags) do {                                \
  49         bzero(&__CONCAT(name, msg), sizeof(__CONCAT(name, msg)));       \
  50         (__CONCAT(name, msg)).usrmsg.umsg.ms_cmd.cm_op =                \
  51                 (__CONCAT(SYS_,name));                                  \
  52         (__CONCAT(name, msg)).usrmsg.umsg.ms_flags = (flags);           \
  53 } while (0)
  54
  55 #define DOMSGSYSCALL(name) do {                                         \
  56         error = sendsys(NULL, &__CONCAT(name,msg).usrmsg,               \
  57                 sizeof(__CONCAT(name,msg)));                            \
  58 } while (0)
  59
  60 #define FINISHMSGSYSCALL(name, error) do {                              \
  61         if (__CONCAT(name,msg).usrmsg.umsg.ms_error == EASYNC) {        \
  62                 for (;;) {                                              \
  63                         int rmsg;                                       \
  64                         rmsg = waitsys(NULL, (void *)error, 0);         \
  65                         if (error == rmsg)                              \
  66                                 break;                                  \
  67                         else if (rmsg != 0) {                           \
  68                                 errno = rmsg;                           \
  69                                 return(-1);                             \
  70                         }                                               \
  71                 }                                                       \
  72         }                                                               \
  73         if (__CONCAT(name,msg).usrmsg.umsg.ms_error) {                  \
  74                 errno = __CONCAT(name,msg).usrmsg.umsg.ms_error;        \
  75                 return(-1);                                             \
  76         }                                                               \
  77         else                                                            \
  78                 return(__CONCAT(name,msg).usrmsg.umsg.u.ms_result);     \
  79 } while(0)
  80
  81 static __inline int
  82 sendsys(void *port, void *msg, int msgsize)
  83 {
  84         int error;
  85
  86         __asm __volatile("int $0x81" : "=a"(error), "=c"(msg), "=d"(msgsize) :
  87                          "0"(port), "1"(msg), "2"(msgsize) : "memory");
  88         return(error);
  89 }
  90
  91 static __inline int
  92 waitsys(void *port, void *msg, int msgsize)
  93 {
  94         int error;
  95
  96         __asm __volatile("int $0x82" : "=a"(error), "=c"(msg),
  97                         "=d"(msgsize) : "0"(port), "1"(msg), "2"(msgsize) :
  98                         "memory");
  99         return(error);
 100 }