1*699cd480SApple OSS Distributions /* 2*699cd480SApple OSS Distributions * Copyright (c) 2021 Apple Inc. All rights reserved. 3*699cd480SApple OSS Distributions * 4*699cd480SApple OSS Distributions * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ 5*699cd480SApple OSS Distributions * 6*699cd480SApple OSS Distributions * This file contains Original Code and/or Modifications of Original Code 7*699cd480SApple OSS Distributions * as defined in and that are subject to the Apple Public Source License 8*699cd480SApple OSS Distributions * Version 2.0 (the 'License'). You may not use this file except in 9*699cd480SApple OSS Distributions * compliance with the License. The rights granted to you under the License 10*699cd480SApple OSS Distributions * may not be used to create, or enable the creation or redistribution of, 11*699cd480SApple OSS Distributions * unlawful or unlicensed copies of an Apple operating system, or to 12*699cd480SApple OSS Distributions * circumvent, violate, or enable the circumvention or violation of, any 13*699cd480SApple OSS Distributions * terms of an Apple operating system software license agreement. 14*699cd480SApple OSS Distributions * 15*699cd480SApple OSS Distributions * Please obtain a copy of the License at 16*699cd480SApple OSS Distributions * http://www.opensource.apple.com/apsl/ and read it before using this file. 17*699cd480SApple OSS Distributions * 18*699cd480SApple OSS Distributions * The Original Code and all software distributed under the License are 19*699cd480SApple OSS Distributions * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER 20*699cd480SApple OSS Distributions * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, 21*699cd480SApple OSS Distributions * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, 22*699cd480SApple OSS Distributions * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. 23*699cd480SApple OSS Distributions * Please see the License for the specific language governing rights and 24*699cd480SApple OSS Distributions * limitations under the License. 25*699cd480SApple OSS Distributions * 26*699cd480SApple OSS Distributions * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ 27*699cd480SApple OSS Distributions */ 28*699cd480SApple OSS Distributions 29*699cd480SApple OSS Distributions #include <darwintest.h> 30*699cd480SApple OSS Distributions #include <pthread.h> 31*699cd480SApple OSS Distributions #include <sys/types.h> 32*699cd480SApple OSS Distributions #include <sys/sysctl.h> 33*699cd480SApple OSS Distributions 34*699cd480SApple OSS Distributions T_GLOBAL_META( 35*699cd480SApple OSS Distributions T_META_NAMESPACE("xnu.arm"), 36*699cd480SApple OSS Distributions T_META_RADAR_COMPONENT_NAME("xnu"), 37*699cd480SApple OSS Distributions T_META_RADAR_COMPONENT_VERSION("arm"), 38*699cd480SApple OSS Distributions T_META_OWNER("joster"), 39*699cd480SApple OSS Distributions T_META_RUN_CONCURRENTLY(true)); 40*699cd480SApple OSS Distributions 41*699cd480SApple OSS Distributions T_DECL(x18_unentitled, 42*699cd480SApple OSS Distributions "Test that x18 is trashed when unentitled.") 43*699cd480SApple OSS Distributions { 44*699cd480SApple OSS Distributions #ifndef __arm64__ 45*699cd480SApple OSS Distributions T_SKIP("Running on non-arm64 target, skipping..."); 46*699cd480SApple OSS Distributions #else 47*699cd480SApple OSS Distributions uint64_t x18_val; 48*699cd480SApple OSS Distributions for (uint64_t i = 0xFEEDB0B000000000ULL; i < 0xFEEDB0B000000000ULL + 10000; ++i) { 49*699cd480SApple OSS Distributions asm volatile ("mov x18, %0" : : "r"(i)); 50*699cd480SApple OSS Distributions sched_yield(); 51*699cd480SApple OSS Distributions asm volatile ("mov %0, x18" : "=r"(x18_val)); 52*699cd480SApple OSS Distributions T_QUIET; T_ASSERT_EQ(x18_val, 0ULL, "check that x18 is cleared after yield"); 53*699cd480SApple OSS Distributions } 54*699cd480SApple OSS Distributions #endif 55*699cd480SApple OSS Distributions } 56