osfmk/kern/ipc_mig.h

   1 /*
   2  * Copyright (c) 2000-2005 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
   5  *
   6  * This file contains Original Code and/or Modifications of Original Code
   7  * as defined in and that are subject to the Apple Public Source License
   8  * Version 2.0 (the 'License'). You may not use this file except in
   9  * compliance with the License. The rights granted to you under the License
  10  * may not be used to create, or enable the creation or redistribution of,
  11  * unlawful or unlicensed copies of an Apple operating system, or to
  12  * circumvent, violate, or enable the circumvention or violation of, any
  13  * terms of an Apple operating system software license agreement.
  14  *
  15  * Please obtain a copy of the License at
  16  * http://www.opensource.apple.com/apsl/ and read it before using this file.
  17  *
  18  * The Original Code and all software distributed under the License are
  19  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  20  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  21  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  22  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  23  * Please see the License for the specific language governing rights and
  24  * limitations under the License.
  25  *
  26  * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
  27  */
  28 /*
  29  * @OSF_COPYRIGHT@
  30  */
  31
  32 #ifndef _KERN_IPC_MIG_H_
  33 #define _KERN_IPC_MIG_H_
  34
  35 #include <mach/mig.h>
  36 #include <mach/mach_types.h>
  37 #include <mach/message.h>
  38 #include <kern/kern_types.h>
  39
  40 #include <sys/cdefs.h>
  41
  42 #ifdef  XNU_KERNEL_PRIVATE
  43
  44 #include <sys/kdebug.h>
  45
  46 /*
  47  * Define the trace points for MIG-generated calls.  One traces the input parameters
  48  * to MIG called things, another traces the outputs, and one traces bad message IDs.
  49  */
  50 #ifdef _MIG_TRACE_PARAMETERS_
  51
  52 #define __BeforeRcvCallTrace(msgid,arg1,arg2,arg3,arg4)                               \
  53         KERNEL_DEBUG_CONSTANT(KDBG_MIGCODE(msgid) | DBG_FUNC_START,                   \
  54                               (unsigned int)(arg1),                                   \
  55                               (unsigned int)(arg2),                                   \
  56                               (unsigned int)(arg3),                                   \
  57                               (unsigned int)(arg4),                                   \
  58                               (unsigned int)(0));
  59
  60 #define __AfterRcvCallTrace(msgid,arg1,arg2,arg3,arg4)                                \
  61         KERNEL_DEBUG_CONSTANT(KDBG_MIGCODE(msgid) | DBG_FUNC_END,                     \
  62                               (unsigned int)(arg1),                                   \
  63                               (unsigned int)(arg2),                                   \
  64                               (unsigned int)(arg3),                                   \
  65                               (unsigned int)(arg4),                                   \
  66                               (unsigned int)(0));
  67
  68 #define __BeforeSimpleCallTrace(msgid,arg1,arg2,arg3,arg4)                            \
  69         KERNEL_DEBUG_CONSTANT(KDBG_MIGCODE(msgid) | DBG_FUNC_START,                   \
  70                               (unsigned int)(arg1),                                   \
  71                               (unsigned int)(arg2),                                   \
  72                               (unsigned int)(arg3),                                   \
  73                               (unsigned int)(arg4),                                   \
  74                               (unsigned int)(0));
  75
  76 #define __AfterSimpleCallTrace(msgid,arg1,arg2,arg3,arg4)                             \
  77         KERNEL_DEBUG_CONSTANT(KDBG_MIGCODE(msgid) | DBG_FUNC_END,                     \
  78                               (unsigned int)(arg1),                                   \
  79                               (unsigned int)(arg2),                                   \
  80                               (unsigned int)(arg3),                                   \
  81                               (unsigned int)(arg4),                                   \
  82                               (unsigned int)(0));
  83
  84 #else /* !_MIG_TRACE_PARAMETERS_ */
  85
  86 #define __BeforeRcvRpc(msgid, _NAME_)                                                 \
  87         KERNEL_DEBUG_CONSTANT(KDBG_MIGCODE(msgid) | DBG_FUNC_START,                   \
  88                               (unsigned int)(0),                                      \
  89                               (unsigned int)(0),                                      \
  90                               (unsigned int)(0),                                      \
  91                               (unsigned int)(0),                                      \
  92                               (unsigned int)(0));
  93
  94 #define __AfterRcvRpc(msgid, _NAME_)                                                  \
  95         KERNEL_DEBUG_CONSTANT(KDBG_MIGCODE(msgid) | DBG_FUNC_END,                     \
  96                               (unsigned int)(0),                                      \
  97                               (unsigned int)(0),                                      \
  98                               (unsigned int)(0),                                      \
  99                               (unsigned int)(0),                                      \
 100                               (unsigned int)(0));
 101
 102
 103 #define __BeforeRcvSimple(msgid, _NAME_)                                              \
 104         KERNEL_DEBUG_CONSTANT(KDBG_MIGCODE(msgid) | DBG_FUNC_START,                   \
 105                               (unsigned int)(0),                                      \
 106                               (unsigned int)(0),                                      \
 107                               (unsigned int)(0),                                      \
 108                               (unsigned int)(0),                                      \
 109                               (unsigned int)(0));
 110
 111 #define __AfterRcvSimple(msgid, _NAME_)                                               \
 112         KERNEL_DEBUG_CONSTANT(KDBG_MIGCODE(msgid) | DBG_FUNC_END,                     \
 113                               (unsigned int)(0),                                      \
 114                               (unsigned int)(0),                                      \
 115                               (unsigned int)(0),                                      \
 116                               (unsigned int)(0),                                      \
 117                               (unsigned int)(0));
 118
 119 #endif /* !_MIG_TRACE_PARAMETERS_ */
 120
 121 #define _MIG_MSGID_INVALID(msgid)                                                     \
 122         KERNEL_DEBUG_CONSTANT(MACHDBG_CODE(DBG_MACH_MSGID_INVALID, (msgid)),          \
 123                               (unsigned int)(0),                                      \
 124                               (unsigned int)(0),                                      \
 125                               (unsigned int)(0),                                      \
 126                               (unsigned int)(0),                                      \
 127                               (unsigned int)(0))
 128
 129 #endif  /* XNU_KERNEL_PRIVATE */
 130
 131 __BEGIN_DECLS
 132
 133 /* Send a message from the kernel */
 134 extern mach_msg_return_t mach_msg_send_from_kernel(
 135         mach_msg_header_t       *msg,
 136         mach_msg_size_t         send_size);
 137
 138
 139 extern mach_msg_return_t mach_msg_rpc_from_kernel(
 140         mach_msg_header_t       *msg,
 141         mach_msg_size_t         send_size,
 142         mach_msg_size_t         rcv_size);
 143
 144 __END_DECLS
 145
 146 #ifdef  MACH_KERNEL_PRIVATE
 147
 148 extern void mach_msg_receive_continue(void);
 149
 150 /* Initialize kernel server dispatch table */
 151 extern void             mig_init(void);
 152
 153 /*
 154  * Kernel implementation of the MIG object base class
 155  *
 156  * Conforms to the MIGObjectInterface defined in <mach/mig.h>
 157  * Ports are automatically allocated for the duration of outstanding
 158  * cross-task references and then released.
 159  */
 160
 161 typedef struct mig_object {
 162                         const IMIGObjectVtbl    *pVtbl; /* our interface def */
 163                         mach_port_t             port;    /* our port pointer  */
 164 } mig_object_data_t;
 165
 166
 167 /*
 168  * MIG notify base class definition
 169  * These are chained off the mig object to which the are registered.
 170  * When that object triggers a notification delivery, we walk this
 171  * chain and deliver the appropriate notification.
 172  */
 173 typedef struct mig_notify_object {
 174                         const IMIGNotifyObjectVtbl *pVtbl; /* our interface def */
 175                         mach_port_t             port;    /* our port pointer  */
 176 } mig_notify_object_data_t;
 177
 178 extern kern_return_t mig_object_init(
 179                         mig_object_t            mig_object,
 180                         const IMIGObject        *interface);
 181
 182 extern void mig_object_destroy(
 183                         mig_object_t            mig_object);
 184
 185 extern void mig_object_reference(
 186                         mig_object_t            mig_object);
 187
 188 extern void mig_object_deallocate(
 189                         mig_object_t            mig_object);
 190
 191 extern ipc_port_t convert_mig_object_to_port(
 192                         mig_object_t            mig_object);
 193
 194 extern mig_object_t convert_port_to_mig_object(
 195                         ipc_port_t              port,
 196                         const MIGIID            *iid);
 197
 198 boolean_t mig_object_no_senders(
 199                         ipc_port_t              port,
 200                         mach_port_mscount_t     mscount);
 201
 202 #endif  /* MACH_KERNEL_PRIVATE */
 203
 204 #endif  /* _KERN_IPC_MIG_H_ */