xnu-6153.61.1.tar.gz

[apple/xnu.git] / osfmk / ipc / mach_debug.c

diff --git a/osfmk/ipc/mach_debug.c b/osfmk/ipc/mach_debug.c
index cc0acd9127d0156109b7a4adbb56149dc760a5c7..cf1d90c0b281d69285d8f1d4045528ffd7561062 100644 (file)
--- a/osfmk/ipc/mach_debug.c
+++ b/osfmk/ipc/mach_debug.c
@@ -2,7 +2,7 @@
  * Copyright (c) 2000-2004 Apple Computer, Inc. All rights reserved.
  *
  * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
  * Copyright (c) 2000-2004 Apple Computer, Inc. All rights reserved.
  *
  * @APPLE_OSREFERENCE_LICENSE_HEADER_START@

- * 
+ *

  * This file contains Original Code and/or Modifications of Original Code
  * as defined in and that are subject to the Apple Public Source License
  * Version 2.0 (the 'License'). You may not use this file except in
  * This file contains Original Code and/or Modifications of Original Code
  * as defined in and that are subject to the Apple Public Source License
  * Version 2.0 (the 'License'). You may not use this file except in


@@ -11,10 +11,10 @@
  * unlawful or unlicensed copies of an Apple operating system, or to
  * circumvent, violate, or enable the circumvention or violation of, any
  * terms of an Apple operating system software license agreement.
  * unlawful or unlicensed copies of an Apple operating system, or to
  * circumvent, violate, or enable the circumvention or violation of, any
  * terms of an Apple operating system software license agreement.

- * 
+ *

  * Please obtain a copy of the License at
  * http://www.opensource.apple.com/apsl/ and read it before using this file.
  * Please obtain a copy of the License at
  * http://www.opensource.apple.com/apsl/ and read it before using this file.

- * 
+ *

  * The Original Code and all software distributed under the License are
  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  * The Original Code and all software distributed under the License are
  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,


@@ -22,34 +22,34 @@
  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  * Please see the License for the specific language governing rights and
  * limitations under the License.
  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  * Please see the License for the specific language governing rights and
  * limitations under the License.

- * 
+ *

  * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
  */
 /*
  * @OSF_COPYRIGHT@
  */
  * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
  */
 /*
  * @OSF_COPYRIGHT@
  */

-/* 
+/*

  * Mach Operating System
  * Copyright (c) 1991,1990 Carnegie Mellon University
  * All Rights Reserved.
  * Mach Operating System
  * Copyright (c) 1991,1990 Carnegie Mellon University
  * All Rights Reserved.

- * 
+ *

  * Permission to use, copy, modify and distribute this software and its
  * documentation is hereby granted, provided that both the copyright
  * notice and this permission notice appear in all copies of the
  * software, derivative works or modified versions, and any portions
  * thereof, and that both notices appear in supporting documentation.
  * Permission to use, copy, modify and distribute this software and its
  * documentation is hereby granted, provided that both the copyright
  * notice and this permission notice appear in all copies of the
  * software, derivative works or modified versions, and any portions
  * thereof, and that both notices appear in supporting documentation.

- * 
+ *

  * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
  * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
  * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
  * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
  * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
  * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.

- * 
+ *

  * Carnegie Mellon requests users of this software to return to
  * Carnegie Mellon requests users of this software to return to

- * 
+ *

  *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
  *  School of Computer Science
  *  Carnegie Mellon University
  *  Pittsburgh PA 15213-3890
  *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
  *  School of Computer Science
  *  Carnegie Mellon University
  *  Pittsburgh PA 15213-3890

- * 
+ *

  * any improvements or extensions that they make and grant Carnegie Mellon
  * the rights to redistribute these changes.
  */
  * any improvements or extensions that they make and grant Carnegie Mellon
  * the rights to redistribute these changes.
  */


@@ -84,6 +84,8 @@
 #include <ipc/ipc_hash.h>
 #include <ipc/ipc_table.h>
 #include <ipc/ipc_right.h>
 #include <ipc/ipc_hash.h>
 #include <ipc/ipc_table.h>
 #include <ipc/ipc_right.h>

+
+#include <security/mac_mach_internal.h>

 #endif
 
 /*
 #endif
 
 /*


@@ -104,29 +106,31 @@
 #if !MACH_IPC_DEBUG
 kern_return_t
 mach_port_get_srights(
 #if !MACH_IPC_DEBUG
 kern_return_t
 mach_port_get_srights(

-       __unused ipc_space_t            space,
-       __unused mach_port_name_t       name,
-       __unused mach_port_rights_t     *srightsp)
+       __unused ipc_space_t            space,
+       __unused mach_port_name_t       name,
+       __unused mach_port_rights_t     *srightsp)

 {
 {

-        return KERN_FAILURE;
+       return KERN_FAILURE;

 }
 #else
 kern_return_t
 mach_port_get_srights(
 }
 #else
 kern_return_t
 mach_port_get_srights(

-       ipc_space_t             space,
-       mach_port_name_t        name,
-       mach_port_rights_t      *srightsp)
+       ipc_space_t             space,
+       mach_port_name_t        name,
+       mach_port_rights_t      *srightsp)

 {
        ipc_port_t port;
        kern_return_t kr;
        mach_port_rights_t srights;
 
 {
        ipc_port_t port;
        kern_return_t kr;
        mach_port_rights_t srights;
 

-       if (space == IS_NULL)
+       if (space == IS_NULL) {

                return KERN_INVALID_TASK;
                return KERN_INVALID_TASK;

+       }

 
        kr = ipc_port_translate_receive(space, name, &port);
 
        kr = ipc_port_translate_receive(space, name, &port);

-       if (kr != KERN_SUCCESS)
+       if (kr != KERN_SUCCESS) {

                return kr;
                return kr;

+       }

        /* port is locked and active */
 
        srights = port->ip_srights;
        /* port is locked and active */
 
        srights = port->ip_srights;


@@ -154,23 +158,23 @@ mach_port_get_srights(
 #if !MACH_IPC_DEBUG
 kern_return_t
 mach_port_space_info(
 #if !MACH_IPC_DEBUG
 kern_return_t
 mach_port_space_info(

-       __unused ipc_space_t                    space,
-       __unused ipc_info_space_t               *infop,
-       __unused ipc_info_name_array_t  *tablep,
-       __unused mach_msg_type_number_t         *tableCntp,
+       __unused ipc_space_t                    space,
+       __unused ipc_info_space_t               *infop,
+       __unused ipc_info_name_array_t  *tablep,
+       __unused mach_msg_type_number_t         *tableCntp,

        __unused ipc_info_tree_name_array_t *treep,
        __unused ipc_info_tree_name_array_t *treep,

-       __unused mach_msg_type_number_t         *treeCntp)
+       __unused mach_msg_type_number_t         *treeCntp)

 {
 {

-        return KERN_FAILURE;
+       return KERN_FAILURE;

 }
 #else
 kern_return_t
 mach_port_space_info(
 }
 #else
 kern_return_t
 mach_port_space_info(

-       ipc_space_t                     space,
-       ipc_info_space_t                *infop,
-       ipc_info_name_array_t           *tablep,
-       mach_msg_type_number_t          *tableCntp,
-       __unused ipc_info_tree_name_array_t     *treep,
+       ipc_space_t                     space,
+       ipc_info_space_t                *infop,
+       ipc_info_name_array_t           *tablep,
+       mach_msg_type_number_t          *tableCntp,
+       __unused ipc_info_tree_name_array_t     *treep,

        __unused mach_msg_type_number_t         *treeCntp)
 {
        ipc_info_name_t *table_info;
        __unused mach_msg_type_number_t         *treeCntp)
 {
        ipc_info_name_t *table_info;


@@ -183,8 +187,15 @@ mach_port_space_info(
        vm_map_copy_t copy;
 
 
        vm_map_copy_t copy;
 
 

-       if (space == IS_NULL)
+       if (space == IS_NULL) {

                return KERN_INVALID_TASK;
                return KERN_INVALID_TASK;

+       }
+
+#if !(DEVELOPMENT || DEBUG) && CONFIG_MACF
+       const boolean_t dbg_ok = (mac_task_check_expose_task(kernel_task) == 0);
+#else
+       const boolean_t dbg_ok = TRUE;
+#endif

 
        /* start with in-line memory */
 
 
        /* start with in-line memory */
 


@@ -194,32 +205,34 @@ mach_port_space_info(
                is_read_lock(space);
                if (!is_active(space)) {
                        is_read_unlock(space);
                is_read_lock(space);
                if (!is_active(space)) {
                        is_read_unlock(space);

-                       if (table_size != 0)
+                       if (table_size != 0) {

                                kmem_free(ipc_kernel_map,
                                kmem_free(ipc_kernel_map,

-                                         table_addr, table_size);
+                                   table_addr, table_size);
+                       }

                        return KERN_INVALID_TASK;
                }
 
                table_size_needed =
                        return KERN_INVALID_TASK;
                }
 
                table_size_needed =

-                       vm_map_round_page((space->is_table_size
-                                          * sizeof(ipc_info_name_t)),
-                                         VM_MAP_PAGE_MASK(ipc_kernel_map));
+                   vm_map_round_page((space->is_table_size
+                   * sizeof(ipc_info_name_t)),
+                   VM_MAP_PAGE_MASK(ipc_kernel_map));

 
 

-               if (table_size_needed == table_size)
+               if (table_size_needed == table_size) {

                        break;
                        break;

+               }

 
                is_read_unlock(space);
 
                if (table_size != table_size_needed) {
 
                is_read_unlock(space);
 
                if (table_size != table_size_needed) {

-                       if (table_size != 0)
+                       if (table_size != 0) {

                                kmem_free(ipc_kernel_map, table_addr, table_size);
                                kmem_free(ipc_kernel_map, table_addr, table_size);

-                       kr = kmem_alloc(ipc_kernel_map, &table_addr, table_size_needed);
+                       }
+                       kr = kmem_alloc(ipc_kernel_map, &table_addr, table_size_needed, VM_KERN_MEMORY_IPC);

                        if (kr != KERN_SUCCESS) {
                                return KERN_RESOURCE_SHORTAGE;
                        }
                        table_size = table_size_needed;
                }
                        if (kr != KERN_SUCCESS) {
                                return KERN_RESOURCE_SHORTAGE;
                        }
                        table_size = table_size_needed;
                }

-

        }
        /* space is read-locked and active; we have enough wired memory */
 
        }
        /* space is read-locked and active; we have enough wired memory */
 


@@ -243,7 +256,7 @@ mach_port_space_info(
                iin->iin_type = IE_BITS_TYPE(bits);
                if ((entry->ie_bits & MACH_PORT_TYPE_PORT_RIGHTS) != MACH_PORT_TYPE_NONE &&
                    entry->ie_request != IE_REQ_NONE) {
                iin->iin_type = IE_BITS_TYPE(bits);
                if ((entry->ie_bits & MACH_PORT_TYPE_PORT_RIGHTS) != MACH_PORT_TYPE_NONE &&
                    entry->ie_request != IE_REQ_NONE) {

-                       ipc_port_t port = (ipc_port_t) entry->ie_object;
+                       ipc_port_t port = ip_object_to_port(entry->ie_object);

 
                        assert(IP_VALID(port));
                        ip_lock(port);
 
                        assert(IP_VALID(port));
                        ip_lock(port);


@@ -252,7 +265,7 @@ mach_port_space_info(
                }
 
                iin->iin_urefs = IE_BITS_UREFS(bits);
                }
 
                iin->iin_urefs = IE_BITS_UREFS(bits);

-               iin->iin_object = (natural_t)VM_KERNEL_ADDRPERM((uintptr_t)entry->ie_object);
+               iin->iin_object = (dbg_ok) ? (natural_t)VM_KERNEL_ADDRPERM((uintptr_t)entry->ie_object) : 0;

                iin->iin_next = entry->ie_next;
                iin->iin_hash = entry->ie_index;
        }
                iin->iin_next = entry->ie_next;
                iin->iin_hash = entry->ie_index;
        }


@@ -261,20 +274,24 @@ mach_port_space_info(
 
        /* prepare the table out-of-line data for return */
        if (table_size > 0) {
 
        /* prepare the table out-of-line data for return */
        if (table_size > 0) {

-               if (table_size > infop->iis_table_size * sizeof(ipc_info_name_t))
+               vm_size_t used_table_size;
+
+               used_table_size = infop->iis_table_size * sizeof(ipc_info_name_t);
+               if (table_size > used_table_size) {

                        bzero((char *)&table_info[infop->iis_table_size],
                        bzero((char *)&table_info[infop->iis_table_size],

-                             table_size - infop->iis_table_size * sizeof(ipc_info_name_t));
+                           table_size - used_table_size);
+               }

 
                kr = vm_map_unwire(
                        ipc_kernel_map,
                        vm_map_trunc_page(table_addr,
 
                kr = vm_map_unwire(
                        ipc_kernel_map,
                        vm_map_trunc_page(table_addr,

-                                         VM_MAP_PAGE_MASK(ipc_kernel_map)),
+                       VM_MAP_PAGE_MASK(ipc_kernel_map)),

                        vm_map_round_page(table_addr + table_size,
                        vm_map_round_page(table_addr + table_size,

-                                         VM_MAP_PAGE_MASK(ipc_kernel_map)),
+                       VM_MAP_PAGE_MASK(ipc_kernel_map)),

                        FALSE);
                assert(kr == KERN_SUCCESS);
                        FALSE);
                assert(kr == KERN_SUCCESS);

-               kr = vm_map_copyin(ipc_kernel_map, (vm_map_address_t)table_addr, 
-                                  (vm_map_size_t)table_size, TRUE, &copy);
+               kr = vm_map_copyin(ipc_kernel_map, (vm_map_address_t)table_addr,
+                   (vm_map_size_t)used_table_size, TRUE, &copy);

                assert(kr == KERN_SUCCESS);
                *tablep = (ipc_info_name_t *)copy;
                *tableCntp = infop->iis_table_size;
                assert(kr == KERN_SUCCESS);
                *tablep = (ipc_info_name_t *)copy;
                *tableCntp = infop->iis_table_size;


@@ -305,19 +322,20 @@ mach_port_space_info(
 #if !MACH_IPC_DEBUG
 kern_return_t
 mach_port_space_basic_info(
 #if !MACH_IPC_DEBUG
 kern_return_t
 mach_port_space_basic_info(

-       __unused ipc_space_t                    space,
-       __unused ipc_info_space_basic_t         *infop)
+       __unused ipc_space_t                    space,
+       __unused ipc_info_space_basic_t         *infop)

 {
 {

-        return KERN_FAILURE;
+       return KERN_FAILURE;

 }
 #else
 kern_return_t
 mach_port_space_basic_info(
 }
 #else
 kern_return_t
 mach_port_space_basic_info(

-       ipc_space_t                     space,
-       ipc_info_space_basic_t          *infop)
+       ipc_space_t                     space,
+       ipc_info_space_basic_t          *infop)

 {
 {

-       if (space == IS_NULL)
+       if (space == IS_NULL) {

                return KERN_INVALID_TASK;
                return KERN_INVALID_TASK;

+       }

 
 
        is_read_lock(space);
 
 
        is_read_lock(space);


@@ -358,31 +376,33 @@ mach_port_space_basic_info(
 #if !MACH_IPC_DEBUG
 kern_return_t
 mach_port_dnrequest_info(
 #if !MACH_IPC_DEBUG
 kern_return_t
 mach_port_dnrequest_info(

-       __unused ipc_space_t            space,
-       __unused mach_port_name_t       name,
-       __unused unsigned int   *totalp,
-       __unused unsigned int   *usedp)
+       __unused ipc_space_t            space,
+       __unused mach_port_name_t       name,
+       __unused unsigned int   *totalp,
+       __unused unsigned int   *usedp)

 {
 {

-        return KERN_FAILURE;
+       return KERN_FAILURE;

 }
 #else
 kern_return_t
 mach_port_dnrequest_info(
 }
 #else
 kern_return_t
 mach_port_dnrequest_info(

-       ipc_space_t                     space,
-       mach_port_name_t                name,
-       unsigned int                    *totalp,
-       unsigned int                    *usedp)
+       ipc_space_t                     space,
+       mach_port_name_t                name,
+       unsigned int                    *totalp,
+       unsigned int                    *usedp)

 {
        unsigned int total, used;
        ipc_port_t port;
        kern_return_t kr;
 
 {
        unsigned int total, used;
        ipc_port_t port;
        kern_return_t kr;
 

-       if (space == IS_NULL)
+       if (space == IS_NULL) {

                return KERN_INVALID_TASK;
                return KERN_INVALID_TASK;

+       }

 
        kr = ipc_port_translate_receive(space, name, &port);
 
        kr = ipc_port_translate_receive(space, name, &port);

-       if (kr != KERN_SUCCESS)
+       if (kr != KERN_SUCCESS) {

                return kr;
                return kr;

+       }

        /* port is locked and active */
 
        if (port->ip_requests == IPR_NULL) {
        /* port is locked and active */
 
        if (port->ip_requests == IPR_NULL) {


@@ -395,11 +415,12 @@ mach_port_dnrequest_info(
                total = requests->ipr_size->its_size;
 
                for (index = 1, used = 0;
                total = requests->ipr_size->its_size;
 
                for (index = 1, used = 0;

-                    index < total; index++) {
+                   index < total; index++) {

                        ipc_port_request_t ipr = &requests[index];
 
                        ipc_port_request_t ipr = &requests[index];
 

-                       if (ipr->ipr_name != MACH_PORT_NULL)
+                       if (ipr->ipr_name != MACH_PORT_NULL) {

                                used++;
                                used++;

+                       }

                }
        }
        ip_unlock(port);
                }
        }
        ip_unlock(port);


@@ -432,32 +453,34 @@ mach_port_dnrequest_info(
 #if !MACH_IPC_DEBUG
 kern_return_t
 mach_port_kobject(
 #if !MACH_IPC_DEBUG
 kern_return_t
 mach_port_kobject(

-       __unused ipc_space_t            space,
-       __unused mach_port_name_t       name,
-       __unused natural_t              *typep,
-       __unused mach_vm_address_t      *addrp)
+       __unused ipc_space_t            space,
+       __unused mach_port_name_t       name,
+       __unused natural_t              *typep,
+       __unused mach_vm_address_t      *addrp)

 {
 {

-        return KERN_FAILURE;
+       return KERN_FAILURE;

 }
 #else
 kern_return_t
 mach_port_kobject(
 }
 #else
 kern_return_t
 mach_port_kobject(

-       ipc_space_t                     space,
-       mach_port_name_t                name,
-       natural_t                       *typep,
-       mach_vm_address_t               *addrp)
+       ipc_space_t                     space,
+       mach_port_name_t                name,
+       natural_t                       *typep,
+       mach_vm_address_t               *addrp)

 {
        ipc_entry_t entry;
        ipc_port_t port;
        kern_return_t kr;
        mach_vm_address_t kaddr;
 
 {
        ipc_entry_t entry;
        ipc_port_t port;
        kern_return_t kr;
        mach_vm_address_t kaddr;
 

-       if (space == IS_NULL)
+       if (space == IS_NULL) {

                return KERN_INVALID_TASK;
                return KERN_INVALID_TASK;

+       }

 
        kr = ipc_right_lookup_read(space, name, &entry);
 
        kr = ipc_right_lookup_read(space, name, &entry);

-       if (kr != KERN_SUCCESS)
+       if (kr != KERN_SUCCESS) {

                return kr;
                return kr;

+       }

        /* space is read-locked and active */
 
        if ((entry->ie_bits & MACH_PORT_TYPE_SEND_RECEIVE) == 0) {
        /* space is read-locked and active */
 
        if ((entry->ie_bits & MACH_PORT_TYPE_SEND_RECEIVE) == 0) {


@@ -465,7 +488,7 @@ mach_port_kobject(
                return KERN_INVALID_RIGHT;
        }
 
                return KERN_INVALID_RIGHT;
        }
 

-       port = (ipc_port_t) entry->ie_object;
+       port = ip_object_to_port(entry->ie_object);

        assert(port != IP_NULL);
 
        ip_lock(port);
        assert(port != IP_NULL);
 
        ip_lock(port);


@@ -478,17 +501,18 @@ mach_port_kobject(
 
        *typep = (unsigned int) ip_kotype(port);
        kaddr = (mach_vm_address_t)port->ip_kobject;
 
        *typep = (unsigned int) ip_kotype(port);
        kaddr = (mach_vm_address_t)port->ip_kobject;

-       ip_unlock(port);
-
-
-       if (0 != kaddr && is_ipc_kobject(*typep))
+       *addrp = 0;
+#if (DEVELOPMENT || DEBUG)
+       if (kaddr && ip_is_kobject(port)) {

                *addrp = VM_KERNEL_UNSLIDE_OR_PERM(kaddr);
                *addrp = VM_KERNEL_UNSLIDE_OR_PERM(kaddr);

-       else
-               *addrp = 0;
+       }
+#endif
+       ip_unlock(port);

 
        return KERN_SUCCESS;
 }
 #endif /* MACH_IPC_DEBUG */
 
        return KERN_SUCCESS;
 }
 #endif /* MACH_IPC_DEBUG */

+

 /*
  *     Routine:        mach_port_kernel_object [Legacy kernel call]
  *     Purpose:
 /*
  *     Routine:        mach_port_kernel_object [Legacy kernel call]
  *     Purpose:


@@ -510,20 +534,20 @@ mach_port_kobject(
 #if !MACH_IPC_DEBUG
 kern_return_t
 mach_port_kernel_object(
 #if !MACH_IPC_DEBUG
 kern_return_t
 mach_port_kernel_object(

-       __unused ipc_space_t            space,
-       __unused mach_port_name_t       name,
-       __unused unsigned int           *typep,
-       __unused unsigned int           *addrp)
+       __unused ipc_space_t            space,
+       __unused mach_port_name_t       name,
+       __unused unsigned int           *typep,
+       __unused unsigned int           *addrp)

 {
 {

-        return KERN_FAILURE;
+       return KERN_FAILURE;

 }
 #else
 kern_return_t
 mach_port_kernel_object(
 }
 #else
 kern_return_t
 mach_port_kernel_object(

-       ipc_space_t                     space,
-       mach_port_name_t                name,
-       unsigned int                    *typep,
-       unsigned int                    *addrp)
+       ipc_space_t                     space,
+       mach_port_name_t                name,
+       unsigned int                    *typep,
+       unsigned int                    *addrp)

 {
        mach_vm_address_t addr = 0;
        kern_return_t kr;
 {
        mach_vm_address_t addr = 0;
        kern_return_t kr;


@@ -533,3 +557,55 @@ mach_port_kernel_object(
        return kr;
 }
 #endif /* MACH_IPC_DEBUG */
        return kr;
 }
 #endif /* MACH_IPC_DEBUG */

+
+#if (DEVELOPMENT || DEBUG)
+kern_return_t
+mach_port_special_reply_port_reset_link(
+       ipc_space_t             space,
+       mach_port_name_t        name,
+       boolean_t               *srp_lost_link)
+{
+       ipc_port_t port;
+       kern_return_t kr;
+       thread_t thread = current_thread();
+
+       if (space != current_space()) {
+               return KERN_INVALID_TASK;
+       }
+
+       if (!MACH_PORT_VALID(name)) {
+               return KERN_INVALID_NAME;
+       }
+
+       if (!IP_VALID(thread->ith_special_reply_port)) {
+               return KERN_INVALID_VALUE;
+       }
+
+       kr = ipc_port_translate_receive(space, name, &port);
+       if (kr != KERN_SUCCESS) {
+               return kr;
+       }
+
+       if (thread->ith_special_reply_port != port) {
+               ip_unlock(port);
+               return KERN_INVALID_ARGUMENT;
+       }
+
+       imq_lock(&port->ip_messages);
+       *srp_lost_link = (port->ip_srp_lost_link == 1)? TRUE : FALSE;
+       port->ip_srp_lost_link = 0;
+       imq_unlock(&port->ip_messages);
+
+       ip_unlock(port);
+       return KERN_SUCCESS;
+}
+#else
+kern_return_t
+mach_port_special_reply_port_reset_link(
+       __unused ipc_space_t            space,
+       __unused mach_port_name_t       name,
+       __unused boolean_t              *srp_lost_link)
+{
+       return KERN_NOT_SUPPORTED;
+}
+#endif