1 /* 2 * Copyright (c) 2024 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 #if __arm64__ 30 #include <arm_acle.h> 31 #include <darwintest.h> 32 #include <mach/mach.h> 33 #include <mach/vm_map.h> 34 35 #include "arm_mte_utilities.h" 36 #include "test_utils.h" 37 38 /* 39 * This binary is code signed with the signing ID com.apple.internal.arm_mte_soft_mode_test. 40 * On internal builds, AMFI contains this ID on the MTE soft mode list. 41 */ 42 T_DECL(mte_soft_mode_enabled, 43 "Test that soft mode is enabled on binaries in the AMFI soft mode list", 44 T_META_REQUIRES_SYSCTL_EQ("hw.optional.arm.FEAT_MTE2", 1), 45 XNU_T_META_REQUIRES_DEVELOPMENT_KERNEL, 46 XNU_T_META_SOC_SPECIFIC, 47 T_META_ENABLED(false) /* rdar://142784868 */) 48 { 49 /* verify that the process is running with MTE enabled */ 50 T_SETUPBEGIN; 51 validate_proc_pidinfo_mte_soft_mode_status(getpid(), true); 52 T_END_IF_FAILED; 53 54 vm_size_t alloc_size = 16 * 1024; 55 vm_address_t address = allocate_and_tag_range(alloc_size, TAG_RANDOM); 56 T_SETUPEND; 57 58 char *ptr = (char*)address; 59 char *incorrectly_tagged_ptr = __arm_mte_increment_tag(ptr, 1); 60 61 *ptr = 'a'; 62 T_LOG("wrote with correct tag"); 63 T_EXPECT_EQ(*incorrectly_tagged_ptr, 'a', "read with incorrect tag"); 64 65 *incorrectly_tagged_ptr = 'b'; 66 T_EXPECT_EQ(*ptr, 'b', "write with incorrect tag"); 67 T_LOG("read with correct tag"); 68 } 69 #endif /* __arm64__ */ 70