1*0f4c859eSApple OSS Distributions /* 2*0f4c859eSApple OSS Distributions * Copyright (c) 2021 Apple Inc. All rights reserved. 3*0f4c859eSApple OSS Distributions * 4*0f4c859eSApple OSS Distributions * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ 5*0f4c859eSApple OSS Distributions * 6*0f4c859eSApple OSS Distributions * This file contains Original Code and/or Modifications of Original Code 7*0f4c859eSApple OSS Distributions * as defined in and that are subject to the Apple Public Source License 8*0f4c859eSApple OSS Distributions * Version 2.0 (the 'License'). You may not use this file except in 9*0f4c859eSApple OSS Distributions * compliance with the License. The rights granted to you under the License 10*0f4c859eSApple OSS Distributions * may not be used to create, or enable the creation or redistribution of, 11*0f4c859eSApple OSS Distributions * unlawful or unlicensed copies of an Apple operating system, or to 12*0f4c859eSApple OSS Distributions * circumvent, violate, or enable the circumvention or violation of, any 13*0f4c859eSApple OSS Distributions * terms of an Apple operating system software license agreement. 14*0f4c859eSApple OSS Distributions * 15*0f4c859eSApple OSS Distributions * Please obtain a copy of the License at 16*0f4c859eSApple OSS Distributions * http://www.opensource.apple.com/apsl/ and read it before using this file. 17*0f4c859eSApple OSS Distributions * 18*0f4c859eSApple OSS Distributions * The Original Code and all software distributed under the License are 19*0f4c859eSApple OSS Distributions * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER 20*0f4c859eSApple OSS Distributions * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, 21*0f4c859eSApple OSS Distributions * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, 22*0f4c859eSApple OSS Distributions * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. 23*0f4c859eSApple OSS Distributions * Please see the License for the specific language governing rights and 24*0f4c859eSApple OSS Distributions * limitations under the License. 25*0f4c859eSApple OSS Distributions * 26*0f4c859eSApple OSS Distributions * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ 27*0f4c859eSApple OSS Distributions */ 28*0f4c859eSApple OSS Distributions 29*0f4c859eSApple OSS Distributions #ifndef _UBSAN_MINIMAL_H_ 30*0f4c859eSApple OSS Distributions #define _UBSAN_MINIMAL_H_ 31*0f4c859eSApple OSS Distributions 32*0f4c859eSApple OSS Distributions #if CONFIG_UBSAN_MINIMAL 33*0f4c859eSApple OSS Distributions /* 34*0f4c859eSApple OSS Distributions * This minimal runtime contains the handlers for checks that are suitable 35*0f4c859eSApple OSS Distributions * at runtime. To minimize codegen impact, the handlers simply act as a shim 36*0f4c859eSApple OSS Distributions * to a brk instruction, which gets then inlined by the compiler+LTO. 37*0f4c859eSApple OSS Distributions * This is similar to UBSAN trapping mode, but guarantees that we can fix 38*0f4c859eSApple OSS Distributions * and continue by simply stepping to the next instruction during the exception 39*0f4c859eSApple OSS Distributions * handler. 40*0f4c859eSApple OSS Distributions * 41*0f4c859eSApple OSS Distributions * UBSAN Minimal runtime is currently available only for iOS and only for 42*0f4c859eSApple OSS Distributions * signed overflow checks. It is only used on RELEASE and DEVELOPMENT kernels. 43*0f4c859eSApple OSS Distributions */ 44*0f4c859eSApple OSS Distributions 45*0f4c859eSApple OSS Distributions #pragma GCC visibility push(hidden) 46*0f4c859eSApple OSS Distributions 47*0f4c859eSApple OSS Distributions /* Trap handler for telemetry */ 48*0f4c859eSApple OSS Distributions void ubsan_handle_brk_trap(void *, uint16_t); 49*0f4c859eSApple OSS Distributions 50*0f4c859eSApple OSS Distributions /* Setup ubsan minimal runtime */ 51*0f4c859eSApple OSS Distributions void ubsan_minimal_init(void); 52*0f4c859eSApple OSS Distributions 53*0f4c859eSApple OSS Distributions /* 54*0f4c859eSApple OSS Distributions * signed-integer-overflow ABI 55*0f4c859eSApple OSS Distributions */ 56*0f4c859eSApple OSS Distributions void __ubsan_handle_divrem_overflow_minimal(void); 57*0f4c859eSApple OSS Distributions void __ubsan_handle_negate_overflow_minimal(void); 58*0f4c859eSApple OSS Distributions void __ubsan_handle_mul_overflow_minimal(void); 59*0f4c859eSApple OSS Distributions void __ubsan_handle_sub_overflow_minimal(void); 60*0f4c859eSApple OSS Distributions void __ubsan_handle_add_overflow_minimal(void); 61*0f4c859eSApple OSS Distributions 62*0f4c859eSApple OSS Distributions #pragma GCC visibility pop 63*0f4c859eSApple OSS Distributions 64*0f4c859eSApple OSS Distributions #endif /* CONFIG_UBSAN_MINIMAL */ 65*0f4c859eSApple OSS Distributions #endif /* _UBSAN_MINIMAL_H_ */ 66