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 56struct thread; 57 58void kasan_init(void); 59void kasan_init_early(vm_offset_t, size_t); 60void kasan_shadow_map(vm_offset_t, size_t); 61void kasan_mark(const void *, size_t, size_t, uint8_t); 62void kasan_thread_alloc(struct thread *); 63#else /* KASAN */ 64#define kasan_init() 65#define kasan_shadow_map(a, s) 66#define kasan_mark(p, s, l, c) 67#define kasan_thread_alloc(t) 68#endif /* !KASAN */ 69 70#endif /* !_SYS_ASAN_H_ */ 71