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 _KERNEL_OPT 35 #include "opt_kasan.h" 36 #endif 37 38 #ifdef KASAN 39 #include <sys/types.h> 40 #include <sys/bus.h> 41 42 /* ASAN constants. Part of the compiler ABI. */ 43 #define KASAN_SHADOW_SCALE_SHIFT 3 44 45 /* Stack redzone values. Part of the compiler ABI. */ 46 #define KASAN_STACK_LEFT 0xF1 47 #define KASAN_STACK_MID 0xF2 48 #define KASAN_STACK_RIGHT 0xF3 49 #define KASAN_USE_AFTER_RET 0xF5 50 #define KASAN_USE_AFTER_SCOPE 0xF8 51 52 /* Our redzone values. */ 53 #define KASAN_GENERIC_REDZONE 0xFA 54 #define KASAN_MALLOC_REDZONE 0xFB 55 #define KASAN_KMEM_REDZONE 0xFC 56 #define KASAN_POOL_REDZONE 0xFD 57 #define KASAN_POOL_FREED 0xFE 58 59 /* DMA types. */ 60 #define KASAN_DMA_LINEAR 1 61 #define KASAN_DMA_MBUF 2 62 #define KASAN_DMA_UIO 3 63 #define KASAN_DMA_RAW 4 64 65 void kasan_early_init(void *); 66 void kasan_init(void); 67 void kasan_shadow_map(void *, size_t); 68 69 void kasan_softint(struct lwp *); 70 71 void kasan_dma_sync(bus_dmamap_t, bus_addr_t, bus_size_t, int); 72 void kasan_dma_load(bus_dmamap_t, void *, bus_size_t, int); 73 74 void kasan_add_redzone(size_t *); 75 void kasan_mark(const void *, size_t, size_t, uint8_t); 76 #else 77 #define kasan_early_init(u) __nothing 78 #define kasan_init() __nothing 79 #define kasan_shadow_map(a, s) __nothing 80 #define kasan_dma_sync(m, a, s, o) __nothing 81 #define kasan_dma_load(m, b, s, o) __nothing 82 #define kasan_add_redzone(s) __nothing 83 #define kasan_mark(p, s, l, c) __nothing 84 #endif 85 86 #endif /* !_SYS_ASAN_H_ */ 87