1*2c2f96dcSApple OSS Distributions /* 2*2c2f96dcSApple OSS Distributions * Copyright (c) 2021 Apple Inc. All rights reserved. 3*2c2f96dcSApple OSS Distributions * 4*2c2f96dcSApple OSS Distributions * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ 5*2c2f96dcSApple OSS Distributions * 6*2c2f96dcSApple OSS Distributions * This file contains Original Code and/or Modifications of Original Code 7*2c2f96dcSApple OSS Distributions * as defined in and that are subject to the Apple Public Source License 8*2c2f96dcSApple OSS Distributions * Version 2.0 (the 'License'). You may not use this file except in 9*2c2f96dcSApple OSS Distributions * compliance with the License. The rights granted to you under the License 10*2c2f96dcSApple OSS Distributions * may not be used to create, or enable the creation or redistribution of, 11*2c2f96dcSApple OSS Distributions * unlawful or unlicensed copies of an Apple operating system, or to 12*2c2f96dcSApple OSS Distributions * circumvent, violate, or enable the circumvention or violation of, any 13*2c2f96dcSApple OSS Distributions * terms of an Apple operating system software license agreement. 14*2c2f96dcSApple OSS Distributions * 15*2c2f96dcSApple OSS Distributions * Please obtain a copy of the License at 16*2c2f96dcSApple OSS Distributions * http://www.opensource.apple.com/apsl/ and read it before using this file. 17*2c2f96dcSApple OSS Distributions * 18*2c2f96dcSApple OSS Distributions * The Original Code and all software distributed under the License are 19*2c2f96dcSApple OSS Distributions * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER 20*2c2f96dcSApple OSS Distributions * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, 21*2c2f96dcSApple OSS Distributions * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, 22*2c2f96dcSApple OSS Distributions * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. 23*2c2f96dcSApple OSS Distributions * Please see the License for the specific language governing rights and 24*2c2f96dcSApple OSS Distributions * limitations under the License. 25*2c2f96dcSApple OSS Distributions * 26*2c2f96dcSApple OSS Distributions * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ 27*2c2f96dcSApple OSS Distributions */ 28*2c2f96dcSApple OSS Distributions 29*2c2f96dcSApple OSS Distributions #ifndef _UBSAN_MINIMAL_H_ 30*2c2f96dcSApple OSS Distributions #define _UBSAN_MINIMAL_H_ 31*2c2f96dcSApple OSS Distributions 32*2c2f96dcSApple OSS Distributions #if CONFIG_UBSAN_MINIMAL 33*2c2f96dcSApple OSS Distributions /* 34*2c2f96dcSApple OSS Distributions * This minimal runtime contains the handlers for checks that are suitable 35*2c2f96dcSApple OSS Distributions * at runtime. To minimize codegen impact, the handlers simply act as a shim 36*2c2f96dcSApple OSS Distributions * to a brk instruction, which gets then inlined by the compiler+LTO. 37*2c2f96dcSApple OSS Distributions * This is similar to UBSAN trapping mode, but guarantees that we can fix 38*2c2f96dcSApple OSS Distributions * and continue by simply stepping to the next instruction during the exception 39*2c2f96dcSApple OSS Distributions * handler. 40*2c2f96dcSApple OSS Distributions * 41*2c2f96dcSApple OSS Distributions * UBSAN Minimal runtime is currently available only for iOS and only for 42*2c2f96dcSApple OSS Distributions * signed overflow checks. It is only used on RELEASE and DEVELOPMENT kernels. 43*2c2f96dcSApple OSS Distributions */ 44*2c2f96dcSApple OSS Distributions 45*2c2f96dcSApple OSS Distributions #pragma GCC visibility push(hidden) 46*2c2f96dcSApple OSS Distributions 47*2c2f96dcSApple OSS Distributions /* Trap handler for telemetry */ 48*2c2f96dcSApple OSS Distributions void ubsan_handle_brk_trap(void *, uint16_t); 49*2c2f96dcSApple OSS Distributions 50*2c2f96dcSApple OSS Distributions /* Setup ubsan minimal runtime */ 51*2c2f96dcSApple OSS Distributions void ubsan_minimal_init(void); 52*2c2f96dcSApple OSS Distributions 53*2c2f96dcSApple OSS Distributions /* 54*2c2f96dcSApple OSS Distributions * signed-integer-overflow ABI 55*2c2f96dcSApple OSS Distributions */ 56*2c2f96dcSApple OSS Distributions void __ubsan_handle_divrem_overflow_minimal(void); 57*2c2f96dcSApple OSS Distributions void __ubsan_handle_negate_overflow_minimal(void); 58*2c2f96dcSApple OSS Distributions void __ubsan_handle_mul_overflow_minimal(void); 59*2c2f96dcSApple OSS Distributions void __ubsan_handle_sub_overflow_minimal(void); 60*2c2f96dcSApple OSS Distributions void __ubsan_handle_add_overflow_minimal(void); 61*2c2f96dcSApple OSS Distributions 62*2c2f96dcSApple OSS Distributions #pragma GCC visibility pop 63*2c2f96dcSApple OSS Distributions 64*2c2f96dcSApple OSS Distributions #endif /* CONFIG_UBSAN_MINIMAL */ 65*2c2f96dcSApple OSS Distributions #endif /* _UBSAN_MINIMAL_H_ */ 66