/*
 * Copyright (c) 1988, 1993
 *	The Regents of the University of California.  All rights reserved.
 *
 * %sccs.include.redist.c%
 *
 *	@(#)ktrace.h	8.2 (Berkeley) 02/19/95
 */

/*
 * operations to ktrace system call  (KTROP(op))
 */
#define KTROP_SET		0	/* set trace points */
#define KTROP_CLEAR		1	/* clear trace points */
#define KTROP_CLEARFILE		2	/* stop all tracing to file */
#define	KTROP(o)		((o)&3)	/* macro to extract operation */
/*
 * flags (ORed in with operation)
 */
#define KTRFLAG_DESCEND		4	/* perform op on all children too */

/*
 * ktrace record header
 */
struct ktr_header {
	int	ktr_len;		/* length of buf */
	short	ktr_type;		/* trace record type */
	pid_t	ktr_pid;		/* process id */
	char	ktr_comm[MAXCOMLEN+1];	/* command name */
	struct	timeval ktr_time;	/* timestamp */
	caddr_t	ktr_buf;
};

/*
 * Test for kernel trace point
 */
#define KTRPOINT(p, type)	\
	(((p)->p_traceflag & ((1<<(type))|KTRFAC_ACTIVE)) == (1<<(type)))

/*
 * ktrace record types
 */

/*
 * KTR_SYSCALL - system call record
 */
#define KTR_SYSCALL	1
struct ktr_syscall {
	int	ktr_code;		/* syscall number */
	int	ktr_argsize;		/* size of arguments */
	/*
	 * followed by ktr_argsize/sizeof(register_t) 'register_t's
	 */
};

/*
 * KTR_SYSRET - return from system call record
 */
#define KTR_SYSRET	2
struct ktr_sysret {
	short	ktr_code;
	short	ktr_eosys;
	int	ktr_error;
	int	ktr_retval;
};

/*
 * KTR_NAMEI - namei record
 */
#define KTR_NAMEI	3
	/* record contains pathname */

/*
 * KTR_GENIO - trace generic process i/o
 */
#define KTR_GENIO	4
struct ktr_genio {
	int	ktr_fd;
	enum	uio_rw ktr_rw;
	/*
	 * followed by data successfully read/written
	 */
};

/*
 * KTR_PSIG - trace processed signal
 */
#define	KTR_PSIG	5
struct ktr_psig {
	int	signo;
	sig_t	action;
	int	mask;
	int	code;
};

/*
 * KTR_CSW - trace context switches
 */
#define KTR_CSW		6
struct ktr_csw {
	int	out;	/* 1 if switch out, 0 if switch in */
	int	user;	/* 1 if usermode (ivcsw), 0 if kernel (vcsw) */
};

/*
 * kernel trace points (in p_traceflag)
 */
#define KTRFAC_MASK	0x00ffffff
#define KTRFAC_SYSCALL	(1<<KTR_SYSCALL)
#define KTRFAC_SYSRET	(1<<KTR_SYSRET)
#define KTRFAC_NAMEI	(1<<KTR_NAMEI)
#define KTRFAC_GENIO	(1<<KTR_GENIO)
#define	KTRFAC_PSIG	(1<<KTR_PSIG)
#define KTRFAC_CSW	(1<<KTR_CSW)
/*
 * trace flags (also in p_traceflags)
 */
#define KTRFAC_ROOT	0x80000000	/* root set this trace */
#define KTRFAC_INHERIT	0x40000000	/* pass trace flags to children */
#define KTRFAC_ACTIVE	0x20000000	/* ktrace logging in progress, ignore */

#ifndef	KERNEL

#include <sys/cdefs.h>

__BEGIN_DECLS
int	ktrace __P((const char *, int, int, pid_t));
__END_DECLS

#endif	/* !KERNEL */