xref: /freebsd-10.0-release/sys/amd64/include/pcb.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: @(#)pcb.h	5.10 (Berkeley) 5/12/91
 * $FreeBSD: head/sys/amd64/include/pcb.h 210780 2010-08-02 18:12:30Z jkim $
 */

#ifndef _AMD64_PCB_H_
#define _AMD64_PCB_H_

/*
 * AMD64 process control block
 */
#include <machine/fpu.h>
#include <machine/segments.h>

struct pcb {
	register_t	pcb_r15;
	register_t	pcb_r14;
	register_t	pcb_r13;
	register_t	pcb_r12;
	register_t	pcb_rbp;
	register_t	pcb_rsp;
	register_t	pcb_rbx;
	register_t	pcb_rip;
	register_t	pcb_fsbase;
	register_t	pcb_gsbase;
	register_t	pcb_kgsbase;
	register_t	pcb_cr0;
	register_t	pcb_cr2;
	register_t	pcb_cr3;
	register_t	pcb_cr4;
	register_t	pcb_dr0;
	register_t	pcb_dr1;
	register_t	pcb_dr2;
	register_t	pcb_dr3;
	register_t	pcb_dr6;
	register_t	pcb_dr7;

	u_long		pcb_flags;
#define	PCB_DBREGS	0x02	/* process using debug registers */
#define	PCB_KERNFPU	0x04	/* kernel uses fpu */
#define	PCB_FPUINITDONE	0x08	/* fpu state is initialized */
#define	PCB_USERFPUINITDONE 0x10 /* fpu user state is initialized */
#define	PCB_GS32BIT	0x20	/* linux gs switch */
#define	PCB_32BIT	0x40	/* process has 32 bit context (segs etc) */
#define	PCB_FULLCTX	0x80	/* full context restore on sysret */

	uint16_t	pcb_initial_fpucw;

	caddr_t		pcb_onfault; /* copyin/out fault recovery */

	/* 32-bit segment descriptor */
	struct user_segment_descriptor pcb_gs32sd;
	/* local tss, with i/o bitmap; NULL for common */
	struct amd64tss *pcb_tssp;
	struct	savefpu	*pcb_save;
	char		pcb_full_iret;

	struct region_descriptor pcb_gdt;
	struct region_descriptor pcb_idt;
	struct region_descriptor pcb_ldt;
	uint16_t	pcb_tr;

	struct	savefpu pcb_user_save;
};

#ifdef _KERNEL
struct trapframe;

void	makectx(struct trapframe *, struct pcb *);
int	savectx(struct pcb *);
#endif

#endif /* _AMD64_PCB_H_ */