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      1 /*      $NetBSD: kcov.h,v 1.10 2020/06/05 17:20:57 maxv Exp $        */
      2 
      3 /*
      4  * Copyright (c) 2019-2020 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Siddharth Muralee.
      9  *
     10  * Redistribution and use in source and binary forms, with or without
     11  * modification, are permitted provided that the following conditions
     12  * are met:
     13  * 1. Redistributions of source code must retain the above copyright
     14  *    notice, this list of conditions and the following disclaimer.
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  *
     19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     29  * POSSIBILITY OF SUCH DAMAGE.
     30  */
     31 
     32 #ifndef _SYS_KCOV_H_
     33 #define _SYS_KCOV_H_
     34 
     35 #ifdef _KERNEL_OPT
     36 #include "opt_kcov.h"
     37 #endif
     38 
     39 #include <sys/param.h>
     40 #include <sys/types.h>
     41 #include <sys/atomic.h>
     42 
     43 #define KCOV_IOC_SETBUFSIZE	_IOW('K', 1, uint64_t)
     44 #define KCOV_IOC_ENABLE		_IOW('K', 2, int)
     45 #define KCOV_IOC_DISABLE	_IO('K', 3)
     46 
     47 #define KCOV_IOC_REMOTE_ATTACH	_IOW('K', 10, struct kcov_ioc_remote_attach)
     48 #define KCOV_IOC_REMOTE_DETACH	_IO('K', 11)
     49 
     50 struct kcov_ioc_remote_attach {
     51 	uint64_t subsystem;
     52 	uint64_t id;
     53 };
     54 
     55 #define KCOV_REMOTE_VHCI	0
     56 #define KCOV_REMOTE_VHCI_ID(bus, port)	\
     57 	(((uint64_t)bus << 32ULL) | ((uint64_t)port & 0xFFFFFFFFULL))
     58 
     59 #define KCOV_MODE_NONE		0
     60 #define KCOV_MODE_TRACE_PC	1
     61 #define KCOV_MODE_TRACE_CMP	2
     62 
     63 typedef volatile uint64_t kcov_int_t;
     64 #define KCOV_ENTRY_SIZE sizeof(kcov_int_t)
     65 
     66 #ifdef _KERNEL
     67 #ifdef KCOV
     68 void kcov_remote_register(uint64_t, uint64_t);
     69 void kcov_remote_enter(uint64_t, uint64_t);
     70 void kcov_remote_leave(uint64_t, uint64_t);
     71 void kcov_silence_enter(void);
     72 void kcov_silence_leave(void);
     73 void kcov_lwp_free(struct lwp *);
     74 #else
     75 #define kcov_remote_register(s, i)	__nothing
     76 #define kcov_remote_enter(s, i)		__nothing
     77 #define kcov_remote_leave(s, i)		__nothing
     78 #define kcov_silence_enter()		__nothing
     79 #define kcov_silence_leave()		__nothing
     80 #define kcov_lwp_free(a) __nothing
     81 #endif
     82 #endif
     83 
     84 #endif /* !_SYS_KCOV_H_ */
     85