1 /* $NetBSD: asan.h,v 1.15 2020/09/10 14:10:46 maxv Exp $ */ 2 3 /* 4 * Copyright (c) 2018-2020 Maxime Villard, m00nbsd.net 5 * All rights reserved. 6 * 7 * This code is part of the KASAN subsystem of the NetBSD kernel. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 19 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 20 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 21 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 22 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 23 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 24 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 25 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 26 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 28 * SUCH DAMAGE. 29 */ 30 31 #ifndef _SYS_ASAN_H_ 32 #define _SYS_ASAN_H_ 33 34 #ifdef KASAN 35 #include <sys/types.h> 36 37 /* ASAN constants. Part of the compiler ABI. */ 38 #define KASAN_SHADOW_SCALE 8 39 #define KASAN_SHADOW_SCALE_SHIFT 3 40 41 /* Stack redzone values. Part of the compiler ABI. */ 42 #define KASAN_STACK_LEFT 0xF1 43 #define KASAN_STACK_MID 0xF2 44 #define KASAN_STACK_RIGHT 0xF3 45 #define KASAN_USE_AFTER_RET 0xF5 46 #define KASAN_USE_AFTER_SCOPE 0xF8 47 48 /* Our redzone values. */ 49 #define KASAN_GENERIC_REDZONE 0xFA 50 #define KASAN_MALLOC_REDZONE 0xFB 51 #define KASAN_KMEM_REDZONE 0xFC 52 #define KASAN_UMA_FREED 0xFD 53 #define KASAN_KSTACK_FREED 0xFE 54 #define KASAN_EXEC_ARGS_FREED 0xFF 55 56 void kasan_init(void); 57 void kasan_init_early(vm_offset_t, size_t); 58 void kasan_shadow_map(vm_offset_t, size_t); 59 void kasan_mark(const void *, size_t, size_t, uint8_t); 60 #else /* KASAN */ 61 #define kasan_init() 62 #define kasan_shadow_map(a, s) 63 #define kasan_mark(p, s, l, c) 64 #endif /* !KASAN */ 65 66 #endif /* !_SYS_ASAN_H_ */ 67