osfmk/mach/port.h

   1 /*
   2  * Copyright (c) 2000-2006 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  * Mach Operating System
  33  * Copyright (c) 1991,1990,1989,1988,1987 Carnegie Mellon University
  34  * All Rights Reserved.
  35  *
  36  * Permission to use, copy, modify and distribute this software and its
  37  * documentation is hereby granted, provided that both the copyright
  38  * notice and this permission notice appear in all copies of the
  39  * software, derivative works or modified versions, and any portions
  40  * thereof, and that both notices appear in supporting documentation.
  41  *
  42  * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
  43  * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
  44  * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
  45  *
  46  * Carnegie Mellon requests users of this software to return to
  47  *
  48  *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
  49  *  School of Computer Science
  50  *  Carnegie Mellon University
  51  *  Pittsburgh PA 15213-3890
  52  *
  53  * any improvements or extensions that they make and grant Carnegie Mellon
  54  * the rights to redistribute these changes.
  55  */
  56 /*
  57  * NOTICE: This file was modified by McAfee Research in 2004 to introduce
  58  * support for mandatory and extensible security protections.  This notice
  59  * is included in support of clause 2.2 (b) of the Apple Public License,
  60  * Version 2.0.
  61  */
  62 /*
  63  */
  64 /*
  65  *      File:   mach/port.h
  66  *
  67  *      Definition of a Mach port
  68  *
  69  *      Mach ports are the endpoints to Mach-implemented communications
  70  *      channels (usually uni-directional message queues, but other types
  71  *      also exist).
  72  *
  73  *      Unique collections of these endpoints are maintained for each
  74  *      Mach task.  Each Mach port in the task's collection is given a
  75  *      [task-local] name to identify it - and the the various "rights"
  76  *      held by the task for that specific endpoint.
  77  *
  78  *      This header defines the types used to identify these Mach ports
  79  *      and the various rights associated with them.  For more info see:
  80  *
  81  *      <mach/mach_port.h> - manipulation of port rights in a given space
  82  *      <mach/message.h> - message queue [and port right passing] mechanism
  83  *
  84  */
  85
  86 #ifndef _MACH_PORT_H_
  87 #define _MACH_PORT_H_
  88
  89 #include <sys/cdefs.h>
  90 #include <stdint.h>
  91 #include <mach/boolean.h>
  92 #include <mach/machine/vm_types.h>
  93
  94 /*
  95  *      mach_port_name_t - the local identity for a Mach port
  96  *
  97  *      The name is Mach port namespace specific.  It is used to
  98  *      identify the rights held for that port by the task whose
  99  *      namespace is implied [or specifically provided].
 100  *
 101  *      Use of this type usually implies just a name - no rights.
 102  *      See mach_port_t for a type that implies a "named right."
 103  *
 104  */
 105
 106 typedef natural_t mach_port_name_t;
 107 typedef mach_port_name_t *mach_port_name_array_t;
 108
 109 #ifdef  KERNEL
 110
 111 /*
 112  *      mach_port_t - a named port right
 113  *
 114  *      In the kernel, "rights" are represented [named] by pointers to
 115  *      the ipc port object in question. There is no port namespace for the
 116  *      rights to be collected.
 117  *
 118  *      Actually, there is namespace for the kernel task.  But most kernel
 119  *      code - including, but not limited to, Mach IPC code - lives in the
 120  *      limbo between the current user-level task and the "next" task. Very
 121  *      little of the kernel code runs in full kernel task context.  So very
 122  *      little of it gets to use the kernel task's port name space.
 123  *
 124  *      Because of this implementation approach, all in-kernel rights for
 125  *      a given port coalesce [have the same name/pointer].  The actual
 126  *      references are counted in the port itself.  It is up to the kernel
 127  *      code in question to "just remember" how many [and what type of]
 128  *      rights it holds and handle them appropriately.
 129  *
 130  */
 131
 132 #ifndef MACH_KERNEL_PRIVATE
 133 /*
 134  *      For kernel code that resides outside of Mach proper, we opaque the
 135  *      port structure definition.
 136  */
 137 struct ipc_port;
 138
 139 #endif  /* MACH_KERNEL_PRIVATE */
 140
 141 typedef struct ipc_port         *ipc_port_t;
 142
 143 #define IPC_PORT_NULL           ((ipc_port_t) NULL)
 144 #define IPC_PORT_DEAD           ((ipc_port_t)~0UL)
 145 #define IPC_PORT_VALID(port)    ipc_port_valid(port)
 146
 147 static inline boolean_t
 148 ipc_port_valid(ipc_port_t port)
 149 {
 150         return port != IPC_PORT_DEAD && port;
 151 }
 152
 153 typedef ipc_port_t              mach_port_t;
 154
 155 /*
 156  * Since the 32-bit and 64-bit representations of ~0 are different,
 157  * explicitly handle MACH_PORT_DEAD
 158  */
 159
 160 #define CAST_MACH_PORT_TO_NAME(x) ((mach_port_name_t)(uintptr_t)(x))
 161 #define CAST_MACH_NAME_TO_PORT(x) ((x) == MACH_PORT_DEAD ? (mach_port_t)IPC_PORT_DEAD : (mach_port_t)(uintptr_t)(x))
 162
 163 #else   /* KERNEL */
 164
 165 /*
 166  *      mach_port_t - a named port right
 167  *
 168  *      In user-space, "rights" are represented by the name of the
 169  *      right in the Mach port namespace.  Even so, this type is
 170  *      presented as a unique one to more clearly denote the presence
 171  *      of a right coming along with the name.
 172  *
 173  *      Often, various rights for a port held in a single name space
 174  *      will coalesce and are, therefore, be identified by a single name
 175  *      [this is the case for send and receive rights].  But not
 176  *      always [send-once rights currently get a unique name for
 177  *      each right].
 178  *
 179  */
 180
 181 #include <sys/_types.h>
 182 #include <sys/_types/_mach_port_t.h>
 183
 184 #endif  /* KERNEL */
 185
 186 typedef mach_port_t                     *mach_port_array_t;
 187
 188 /*
 189  *  MACH_PORT_NULL is a legal value that can be carried in messages.
 190  *  It indicates the absence of any port or port rights.  (A port
 191  *  argument keeps the message from being "simple", even if the
 192  *  value is MACH_PORT_NULL.)  The value MACH_PORT_DEAD is also a legal
 193  *  value that can be carried in messages.  It indicates
 194  *  that a port right was present, but it died.
 195  */
 196
 197 #if defined(XNU_KERNEL_PRIVATE) && defined(__cplusplus)
 198 #define MACH_PORT_NULL          NULL
 199 #else
 200 #define MACH_PORT_NULL          0  /* intentional loose typing */
 201 #endif
 202 #define MACH_PORT_DEAD          ((mach_port_name_t) ~0)
 203 #define MACH_PORT_VALID(name)                           \
 204                 (((name) != MACH_PORT_NULL) &&          \
 205                  ((name) != MACH_PORT_DEAD))
 206
 207
 208 /*
 209  *      For kernel-selected [assigned] port names, the name is
 210  *      comprised of two parts: a generation number and an index.
 211  *      This approach keeps the exact same name from being generated
 212  *      and reused too quickly [to catch right/reference counting bugs].
 213  *      The dividing line between the constituent parts is exposed so
 214  *      that efficient "mach_port_name_t to data structure pointer"
 215  *      conversion implementation can be made.  But it is possible
 216  *      for user-level code to assign their own names to Mach ports.
 217  *      These are not required to participate in this algorithm.  So
 218  *      care should be taken before "assuming" this model.
 219  *
 220  */
 221
 222 #ifndef NO_PORT_GEN
 223
 224 #define MACH_PORT_INDEX(name)           ((name) >> 8)
 225 #define MACH_PORT_GEN(name)             (((name) & 0xff) << 24)
 226 #define MACH_PORT_MAKE(index, gen)      \
 227                 (((index) << 8) | (gen) >> 24)
 228
 229 #else   /* NO_PORT_GEN */
 230
 231 #define MACH_PORT_INDEX(name)           (name)
 232 #define MACH_PORT_GEN(name)             (0)
 233 #define MACH_PORT_MAKE(index, gen)      (index)
 234
 235 #endif  /* NO_PORT_GEN */
 236
 237
 238 /*
 239  *  These are the different rights a task may have for a port.
 240  *  The MACH_PORT_RIGHT_* definitions are used as arguments
 241  *  to mach_port_allocate, mach_port_get_refs, etc, to specify
 242  *  a particular right to act upon.  The mach_port_names and
 243  *  mach_port_type calls return bitmasks using the MACH_PORT_TYPE_*
 244  *  definitions.  This is because a single name may denote
 245  *  multiple rights.
 246  */
 247
 248 typedef natural_t mach_port_right_t;
 249
 250 #define MACH_PORT_RIGHT_SEND            ((mach_port_right_t) 0)
 251 #define MACH_PORT_RIGHT_RECEIVE         ((mach_port_right_t) 1)
 252 #define MACH_PORT_RIGHT_SEND_ONCE       ((mach_port_right_t) 2)
 253 #define MACH_PORT_RIGHT_PORT_SET        ((mach_port_right_t) 3)
 254 #define MACH_PORT_RIGHT_DEAD_NAME       ((mach_port_right_t) 4)
 255 #define MACH_PORT_RIGHT_LABELH          ((mach_port_right_t) 5) /* obsolete right */
 256 #define MACH_PORT_RIGHT_NUMBER          ((mach_port_right_t) 6) /* right not implemented */
 257
 258 #ifdef MACH_KERNEL_PRIVATE
 259 #define MACH_PORT_RIGHT_VALID_TRANSLATE(right) \
 260         ((right) >= MACH_PORT_RIGHT_SEND && (right) <= MACH_PORT_RIGHT_DEAD_NAME)
 261 #endif
 262
 263 typedef natural_t mach_port_type_t;
 264 typedef mach_port_type_t *mach_port_type_array_t;
 265
 266 #define MACH_PORT_TYPE(right)                                           \
 267                 ((mach_port_type_t)(((mach_port_type_t) 1)              \
 268                 << ((right) + ((mach_port_right_t) 16))))
 269 #define MACH_PORT_TYPE_NONE         ((mach_port_type_t) 0L)
 270 #define MACH_PORT_TYPE_SEND         MACH_PORT_TYPE(MACH_PORT_RIGHT_SEND)
 271 #define MACH_PORT_TYPE_RECEIVE      MACH_PORT_TYPE(MACH_PORT_RIGHT_RECEIVE)
 272 #define MACH_PORT_TYPE_SEND_ONCE    MACH_PORT_TYPE(MACH_PORT_RIGHT_SEND_ONCE)
 273 #define MACH_PORT_TYPE_PORT_SET     MACH_PORT_TYPE(MACH_PORT_RIGHT_PORT_SET)
 274 #define MACH_PORT_TYPE_DEAD_NAME    MACH_PORT_TYPE(MACH_PORT_RIGHT_DEAD_NAME)
 275 #define MACH_PORT_TYPE_LABELH       MACH_PORT_TYPE(MACH_PORT_RIGHT_LABELH) /* obsolete */
 276
 277 #ifdef MACH_KERNEL_PRIVATE
 278 /* Holder used to have a receive right - remembered to filter exceptions */
 279 #define MACH_PORT_TYPE_EX_RECEIVE   MACH_PORT_TYPE_LABELH
 280 #endif
 281
 282 /* Convenient combinations. */
 283
 284 #define MACH_PORT_TYPE_SEND_RECEIVE                                     \
 285                 (MACH_PORT_TYPE_SEND|MACH_PORT_TYPE_RECEIVE)
 286 #define MACH_PORT_TYPE_SEND_RIGHTS                                      \
 287                 (MACH_PORT_TYPE_SEND|MACH_PORT_TYPE_SEND_ONCE)
 288 #define MACH_PORT_TYPE_PORT_RIGHTS                                      \
 289                 (MACH_PORT_TYPE_SEND_RIGHTS|MACH_PORT_TYPE_RECEIVE)
 290 #define MACH_PORT_TYPE_PORT_OR_DEAD                                     \
 291                 (MACH_PORT_TYPE_PORT_RIGHTS|MACH_PORT_TYPE_DEAD_NAME)
 292 #define MACH_PORT_TYPE_ALL_RIGHTS                                       \
 293                 (MACH_PORT_TYPE_PORT_OR_DEAD|MACH_PORT_TYPE_PORT_SET)
 294
 295 /* Dummy type bits that mach_port_type/mach_port_names can return. */
 296
 297 #define MACH_PORT_TYPE_DNREQUEST                0x80000000
 298 #define MACH_PORT_TYPE_SPREQUEST                0x40000000
 299 #define MACH_PORT_TYPE_SPREQUEST_DELAYED        0x20000000
 300
 301 /* User-references for capabilities. */
 302
 303 typedef natural_t mach_port_urefs_t;
 304 typedef integer_t mach_port_delta_t;                    /* change in urefs */
 305
 306 /* Attributes of ports.  (See mach_port_get_receive_status.) */
 307
 308 typedef natural_t mach_port_seqno_t;            /* sequence number */
 309 typedef natural_t mach_port_mscount_t;          /* make-send count */
 310 typedef natural_t mach_port_msgcount_t;         /* number of msgs */
 311 typedef natural_t mach_port_rights_t;           /* number of rights */
 312
 313 /*
 314  *      Are there outstanding send rights for a given port?
 315  */
 316 #define MACH_PORT_SRIGHTS_NONE          0               /* no srights */
 317 #define MACH_PORT_SRIGHTS_PRESENT       1               /* srights */
 318 typedef unsigned int mach_port_srights_t;       /* status of send rights */
 319
 320 typedef struct mach_port_status {
 321         mach_port_rights_t      mps_pset;       /* count of containing port sets */
 322         mach_port_seqno_t       mps_seqno;      /* sequence number */
 323         mach_port_mscount_t     mps_mscount;    /* make-send count */
 324         mach_port_msgcount_t    mps_qlimit;     /* queue limit */
 325         mach_port_msgcount_t    mps_msgcount;   /* number in the queue */
 326         mach_port_rights_t      mps_sorights;   /* how many send-once rights */
 327         boolean_t               mps_srights;    /* do send rights exist? */
 328         boolean_t               mps_pdrequest;  /* port-deleted requested? */
 329         boolean_t               mps_nsrequest;  /* no-senders requested? */
 330         natural_t               mps_flags;              /* port flags */
 331 } mach_port_status_t;
 332
 333 /* System-wide values for setting queue limits on a port */
 334 #define MACH_PORT_QLIMIT_ZERO           (0)
 335 #define MACH_PORT_QLIMIT_BASIC          (5)
 336 #define MACH_PORT_QLIMIT_SMALL          (16)
 337 #define MACH_PORT_QLIMIT_LARGE          (1024)
 338 #define MACH_PORT_QLIMIT_KERNEL         (65534)
 339 #define MACH_PORT_QLIMIT_MIN            MACH_PORT_QLIMIT_ZERO
 340 #define MACH_PORT_QLIMIT_DEFAULT        MACH_PORT_QLIMIT_BASIC
 341 #define MACH_PORT_QLIMIT_MAX            MACH_PORT_QLIMIT_LARGE
 342
 343 typedef struct mach_port_limits {
 344         mach_port_msgcount_t    mpl_qlimit;     /* number of msgs */
 345 } mach_port_limits_t;
 346
 347 /* Possible values for mps_flags (part of mach_port_status_t) */
 348 #define MACH_PORT_STATUS_FLAG_TEMPOWNER         0x01
 349 #define MACH_PORT_STATUS_FLAG_GUARDED           0x02
 350 #define MACH_PORT_STATUS_FLAG_STRICT_GUARD      0x04
 351 #define MACH_PORT_STATUS_FLAG_IMP_DONATION      0x08
 352 #define MACH_PORT_STATUS_FLAG_REVIVE            0x10
 353 #define MACH_PORT_STATUS_FLAG_TASKPTR           0x20
 354 #define MACH_PORT_STATUS_FLAG_GUARD_IMMOVABLE_RECEIVE 0x40
 355 #define MACH_PORT_STATUS_FLAG_NO_GRANT          0x80
 356
 357 typedef struct mach_port_info_ext {
 358         mach_port_status_t      mpie_status;
 359         mach_port_msgcount_t    mpie_boost_cnt;
 360         uint32_t                reserved[6];
 361 } mach_port_info_ext_t;
 362
 363 typedef integer_t *mach_port_info_t;            /* varying array of natural_t */
 364
 365 /* Flavors for mach_port_get/set_attributes() */
 366 typedef int     mach_port_flavor_t;
 367 #define MACH_PORT_LIMITS_INFO           1       /* uses mach_port_limits_t */
 368 #define MACH_PORT_RECEIVE_STATUS        2       /* uses mach_port_status_t */
 369 #define MACH_PORT_DNREQUESTS_SIZE       3       /* info is int */
 370 #define MACH_PORT_TEMPOWNER             4       /* indicates receive right will be reassigned to another task */
 371 #define MACH_PORT_IMPORTANCE_RECEIVER   5       /* indicates recieve right accepts priority donation */
 372 #define MACH_PORT_DENAP_RECEIVER        6       /* indicates receive right accepts de-nap donation */
 373 #define MACH_PORT_INFO_EXT              7       /* uses mach_port_info_ext_t */
 374
 375 #define MACH_PORT_LIMITS_INFO_COUNT     ((natural_t) \
 376         (sizeof(mach_port_limits_t)/sizeof(natural_t)))
 377 #define MACH_PORT_RECEIVE_STATUS_COUNT  ((natural_t) \
 378         (sizeof(mach_port_status_t)/sizeof(natural_t)))
 379 #define MACH_PORT_DNREQUESTS_SIZE_COUNT 1
 380 #define MACH_PORT_INFO_EXT_COUNT        ((natural_t) \
 381         (sizeof(mach_port_info_ext_t)/sizeof(natural_t)))
 382 /*
 383  * Structure used to pass information about port allocation requests.
 384  * Must be padded to 64-bits total length.
 385  */
 386 typedef struct mach_port_qos {
 387         unsigned int            name:1;         /* name given */
 388         unsigned int            prealloc:1;     /* prealloced message */
 389         boolean_t               pad1:30;
 390         natural_t               len;
 391 } mach_port_qos_t;
 392
 393 /* Mach Port Guarding definitions */
 394
 395 /*
 396  * Flags for mach_port_options (used for
 397  * invocation of mach_port_construct).
 398  * Indicates attributes to be set for the newly
 399  * allocated port.
 400  */
 401 #define MPO_CONTEXT_AS_GUARD    0x01    /* Add guard to the port */
 402 #define MPO_QLIMIT              0x02    /* Set qlimit for the port msg queue */
 403 #define MPO_TEMPOWNER           0x04    /* Set the tempowner bit of the port */
 404 #define MPO_IMPORTANCE_RECEIVER 0x08    /* Mark the port as importance receiver */
 405 #define MPO_INSERT_SEND_RIGHT   0x10    /* Insert a send right for the port */
 406 #define MPO_STRICT              0x20    /* Apply strict guarding for port */
 407 #define MPO_DENAP_RECEIVER      0x40    /* Mark the port as App de-nap receiver */
 408 #define MPO_IMMOVABLE_RECEIVE   0x80    /* Mark the port as immovable; protected by the guard context */
 409 #define MPO_FILTER_MSG          0x100   /* Allow message filtering */
 410 #define MPO_TG_BLOCK_TRACKING   0x200   /* Track blocking relationship for thread group during sync IPC */
 411
 412 /*
 413  * Structure to define optional attributes for a newly
 414  * constructed port.
 415  */
 416 typedef struct mach_port_options {
 417         uint32_t                flags;          /* Flags defining attributes for port */
 418         mach_port_limits_t      mpl;            /* Message queue limit for port */
 419         union {
 420                 uint64_t                reserved[2];           /* Reserved */
 421                 mach_port_name_t        work_interval_port;    /* Work interval port */
 422         };
 423 }mach_port_options_t;
 424
 425 typedef mach_port_options_t *mach_port_options_ptr_t;
 426
 427 /*
 428  * EXC_GUARD represents a guard violation for both
 429  * mach ports and file descriptors. GUARD_TYPE_ is used
 430  * to differentiate among them.
 431  */
 432 #define GUARD_TYPE_MACH_PORT    0x1
 433
 434 /* Reasons for exception for a guarded mach port */
 435 enum mach_port_guard_exception_codes {
 436         kGUARD_EXC_DESTROY                       = 1u << 0,
 437         kGUARD_EXC_MOD_REFS                      = 1u << 1,
 438         kGUARD_EXC_SET_CONTEXT               = 1u << 2,
 439         kGUARD_EXC_UNGUARDED                 = 1u << 3,
 440         kGUARD_EXC_INCORRECT_GUARD           = 1u << 4,
 441         kGUARD_EXC_IMMOVABLE                 = 1u << 5,
 442         kGUARD_EXC_STRICT_REPLY              = 1u << 6,
 443         kGUARD_EXC_MSG_FILTERED              = 1u << 7,
 444         /* start of [optionally] non-fatal guards */
 445         kGUARD_EXC_INVALID_RIGHT         = 1u << 8,
 446         kGUARD_EXC_INVALID_NAME          = 1u << 9,
 447         kGUARD_EXC_INVALID_VALUE         = 1u << 10,
 448         kGUARD_EXC_INVALID_ARGUMENT      = 1u << 11,
 449         kGUARD_EXC_RIGHT_EXISTS          = 1u << 12,
 450         kGUARD_EXC_KERN_NO_SPACE         = 1u << 13,
 451         kGUARD_EXC_KERN_FAILURE          = 1u << 14,
 452         kGUARD_EXC_KERN_RESOURCE         = 1u << 15,
 453         kGUARD_EXC_SEND_INVALID_REPLY    = 1u << 16,
 454         kGUARD_EXC_SEND_INVALID_VOUCHER  = 1u << 17,
 455         kGUARD_EXC_SEND_INVALID_RIGHT    = 1u << 18,
 456         kGUARD_EXC_RCV_INVALID_NAME      = 1u << 19,
 457         kGUARD_EXC_RCV_GUARDED_DESC      = 1u << 20, /* should never be fatal; for development only */
 458         kGUARD_EXC_MOD_REFS_NON_FATAL    = 1u << 21,
 459         kGUARD_EXC_IMMOVABLE_NON_FATAL   = 1u << 22,
 460 };
 461
 462 #define MAX_FATAL_kGUARD_EXC_CODE (1u << 7)
 463
 464 /*
 465  * Mach port guard flags.
 466  */
 467 #define MPG_FLAGS_NONE                             (0x00ull)
 468
 469 /*
 470  * These flags are used as bits in the subcode of kGUARD_EXC_STRICT_REPLY exceptions.
 471  */
 472 #define MPG_FLAGS_STRICT_REPLY_INVALID_REPLY_DISP  (0x01ull << 56)
 473 #define MPG_FLAGS_STRICT_REPLY_INVALID_REPLY_PORT  (0x02ull << 56)
 474 #define MPG_FLAGS_STRICT_REPLY_INVALID_VOUCHER     (0x04ull << 56)
 475 #define MPG_FLAGS_STRICT_REPLY_NO_BANK_ATTR        (0x08ull << 56)
 476 #define MPG_FLAGS_STRICT_REPLY_MISMATCHED_PERSONA  (0x10ull << 56)
 477 #define MPG_FLAGS_STRICT_REPLY_MASK                (0xffull << 56)
 478
 479 /*
 480  * These flags are used as bits in the subcode of kGUARD_EXC_MOD_REFS exceptions.
 481  */
 482 #define MPG_FLAGS_MOD_REFS_PINNED_DEALLOC          (0x01ull << 56)
 483
 484 /*
 485  * These flags are used as bits in the subcode of kGUARD_EXC_IMMOVABLE exceptions.
 486  */
 487 #define MPG_FLAGS_IMMOVABLE_PINNED                 (0x01ull << 56)
 488
 489 /*
 490  * Flags for mach_port_guard_with_flags. These flags extend
 491  * the attributes associated with a guarded port.
 492  */
 493 #define MPG_STRICT              0x01    /* Apply strict guarding for a port */
 494 #define MPG_IMMOVABLE_RECEIVE   0x02    /* Receive right cannot be moved out of the space */
 495
 496 #if     !__DARWIN_UNIX03 && !defined(_NO_PORT_T_FROM_MACH)
 497 /*
 498  *  Mach 3.0 renamed everything to have mach_ in front of it.
 499  *  These types and macros are provided for backward compatibility
 500  *      but are deprecated.
 501  */
 502 typedef mach_port_t             port_t;
 503 typedef mach_port_name_t        port_name_t;
 504 typedef mach_port_name_t        *port_name_array_t;
 505
 506 #define PORT_NULL               ((port_t) 0)
 507 #define PORT_DEAD               ((port_t) ~0)
 508 #define PORT_VALID(name) \
 509                 ((port_t)(name) != PORT_NULL && (port_t)(name) != PORT_DEAD)
 510
 511 #endif  /* !__DARWIN_UNIX03 && !_NO_PORT_T_FROM_MACH */
 512
 513 #endif  /* _MACH_PORT_H_ */