freebsd/sys/amd64/include/reg.h

/*-
 * Copyright (c) 2003 Peter Wemm.
 * Copyright (c) 1990 The Regents of the University of California.
 * All rights reserved.
 *
 * This code is derived from software contributed to Berkeley by
 * William Jolitz.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 4. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 *	from: @(#)reg.h	5.5 (Berkeley) 1/18/91
 * $FreeBSD$
 */

#ifndef _MACHINE_REG_H_
#define	_MACHINE_REG_H_

/*
 * Register set accessible via /proc/$pid/regs and PT_{SET,GET}REGS.
 */
struct reg {
	register_t	r_r15;
	register_t	r_r14;
	register_t	r_r13;
	register_t	r_r12;
	register_t	r_r11;
	register_t	r_r10;
	register_t	r_r9;
	register_t	r_r8;
	register_t	r_rdi;
	register_t	r_rsi;
	register_t	r_rbp;
	register_t	r_rbx;
	register_t	r_rdx;
	register_t	r_rcx;
	register_t	r_rax;
	register_t	r_trapno;
	register_t	r_err;
	register_t	r_rip;
	register_t	r_cs;
	register_t	r_rflags;
	register_t	r_rsp;
	register_t	r_ss;
};

/*
 * Register set accessible via /proc/$pid/fpregs.
 */
struct fpreg {
	/*
	 * XXX should get struct from fpu.h.  Here we give a slightly
	 * simplified struct.  This may be too much detail.  Perhaps
	 * an array of unsigned longs is best.
	 */
	unsigned long	fpr_env[4];
	unsigned char	fpr_acc[8][16];
	unsigned char	fpr_xacc[16][16];
	unsigned long	fpr_spare[12];
};

/*
 * Register set accessible via /proc/$pid/dbregs.
 */
struct dbreg {
	unsigned long  dr[16];	/* debug registers */
				/* Index 0-3: debug address registers */
				/* Index 4-5: reserved */
				/* Index 6: debug status */
				/* Index 7: debug control */
				/* Index 8-15: reserved */
};

#define	DBREG_DR7_LOCAL_ENABLE	0x01
#define	DBREG_DR7_GLOBAL_ENABLE	0x02
#define	DBREG_DR7_LEN_1		0x00	/* 1 byte length          */
#define	DBREG_DR7_LEN_2		0x01
#define	DBREG_DR7_LEN_4		0x03
#define	DBREG_DR7_LEN_8		0x02
#define	DBREG_DR7_EXEC		0x00	/* break on execute       */
#define	DBREG_DR7_WRONLY	0x01	/* break on write         */
#define	DBREG_DR7_RDWR		0x03	/* break on read or write */
#define	DBREG_DR7_MASK(i)	((u_long)0xf << ((i) * 4 + 16) | 0x3 << (i) * 2)
#define	DBREG_DR7_SET(i, len, access, enable)				\
	((u_long)((len) << 2 | (access)) << ((i) * 4 + 16) | (enable) << (i) * 2)
#define	DBREG_DR7_GD		0x2000
#define	DBREG_DR7_ENABLED(d, i)	(((d) & 0x3 << (i) * 2) != 0)
#define	DBREG_DR7_ACCESS(d, i)	((d) >> ((i) * 4 + 16) & 0x3)
#define	DBREG_DR7_LEN(d, i)	((d) >> ((i) * 4 + 18) & 0x3)

#define	DBREG_DRX(d,x)	((d)->dr[(x)])	/* reference dr0 - dr15 by
					   register number */

#ifdef _KERNEL
/*
 * XXX these interfaces are MI, so they should be declared in a MI place.
 */
int	fill_regs(struct thread *, struct reg *);
int	set_regs(struct thread *, struct reg *);
int	fill_fpregs(struct thread *, struct fpreg *);
int	set_fpregs(struct thread *, struct fpreg *);
int	fill_dbregs(struct thread *, struct dbreg *);
int	set_dbregs(struct thread *, struct dbreg *);
#endif

#endif /* !_MACHINE_REG_H_ */