libsyscall/mach/host.c

   1 /*
   2  * Copyright (c) 2015 Apple 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 #include <TargetConditionals.h>
  30 #include <machine/cpu_capabilities.h>
  31 #include <mach/kern_return.h>
  32 #include <mach/mach_host.h>
  33 #include <mach/host_priv.h>
  34 #include <sys/types.h>
  35
  36 kern_return_t
  37 host_get_atm_diagnostic_flag(host_t host __unused,
  38     uint32_t *diagnostic_flag)
  39 {
  40         volatile uint32_t *diagnostic_flag_address = (volatile uint32_t *)(uintptr_t)(_COMM_PAGE_ATM_DIAGNOSTIC_CONFIG);
  41         *diagnostic_flag = *diagnostic_flag_address;
  42         return KERN_SUCCESS;
  43 }
  44
  45 kern_return_t
  46 host_get_multiuser_config_flags(host_t host __unused,
  47     uint32_t *multiuser_flags)
  48 {
  49 #if (TARGET_OS_IPHONE && !TARGET_OS_SIMULATOR)
  50         volatile uint32_t *multiuser_flag_address = (volatile uint32_t *)(uintptr_t)(_COMM_PAGE_MULTIUSER_CONFIG);
  51         *multiuser_flags = *multiuser_flag_address;
  52         return KERN_SUCCESS;
  53 #else
  54         (void)multiuser_flags;
  55         return KERN_NOT_SUPPORTED;
  56 #endif
  57 }
  58
  59 kern_return_t
  60 host_check_multiuser_mode(host_t host __unused,
  61     uint32_t *multiuser_mode)
  62 {
  63 #if (TARGET_OS_IPHONE && !TARGET_OS_SIMULATOR)
  64         uint32_t multiuser_flags;
  65         kern_return_t kr;
  66
  67         kr = host_get_multiuser_config_flags(host, &multiuser_flags);
  68         if (kr != KERN_SUCCESS) {
  69                 return kr;
  70         }
  71         *multiuser_mode = (multiuser_flags & kIsMultiUserDevice) == kIsMultiUserDevice;
  72         return KERN_SUCCESS;
  73 #else
  74         (void)multiuser_mode;
  75         return KERN_NOT_SUPPORTED;
  76 #endif
  77 }
  78
  79 extern kern_return_t
  80 _kernelrpc_host_create_mach_voucher(mach_port_name_t host,
  81     mach_voucher_attr_raw_recipe_array_t recipes,
  82     mach_voucher_attr_recipe_size_t recipesCnt,
  83     mach_port_name_t *voucher);
  84
  85 kern_return_t
  86 host_create_mach_voucher(mach_port_name_t host,
  87     mach_voucher_attr_raw_recipe_array_t recipes,
  88     mach_voucher_attr_recipe_size_t recipesCnt,
  89     mach_port_name_t *voucher)
  90 {
  91         kern_return_t rv;
  92
  93         rv = host_create_mach_voucher_trap(host, recipes, recipesCnt, voucher);
  94
  95 #ifdef __x86_64__
  96         /* REMOVE once XBS kernel has new trap */
  97         if (rv == ((1 << 24) | 70)) { /* see mach/i386/syscall_sw.h */
  98                 rv = MACH_SEND_INVALID_DEST;
  99         }
 100 #elif defined(__i386__)
 101         /* REMOVE once XBS kernel has new trap */
 102         if (rv == (kern_return_t)(-70)) {
 103                 rv = MACH_SEND_INVALID_DEST;
 104         }
 105 #endif
 106
 107         if (rv == MACH_SEND_INVALID_DEST) {
 108                 rv = _kernelrpc_host_create_mach_voucher(host, recipes, recipesCnt, voucher);
 109         }
 110
 111         return rv;
 112 }