/*-
 * Copyright (c) 2003 Peter Wemm
 * Copyright (c) 1999 Marcel Moolenaar
 * Copyright (c) 2008 The DragonFly Project.
 * All rights reserved.
 *
 * 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 
 *    in this position and unchanged.
 * 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.
 * 3. The name of the author may not be used to endorse or promote products
 *    derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
 *
 * $FreeBSD: src/sys/amd64/include/ucontext.h,v 1.18 2003/11/08 04:39:22 peter Exp $
 */

#ifndef _CPU_UCONTEXT_H_
#define _CPU_UCONTEXT_H_

#include <sys/cdefs.h>

#include <machine/stdint.h>

struct __mcontext {
        /*
         * The first 20 fields must match the definition of
         * sigcontext. So that we can support sigcontext
         * and ucontext_t at the same time.
         *
         * NOTE: bcopy in sendsig copies trapframe to this
         * structure as of mc_rdi.
         */
        __register_t    mc_onstack;     /* XXX - sigcontext compat. */
        __register_t    mc_rdi;
        __register_t    mc_rsi;
        __register_t    mc_rdx;
        __register_t    mc_rcx;
        __register_t    mc_r8;
        __register_t    mc_r9;
        __register_t    mc_rax;
        __register_t    mc_rbx;
        __register_t    mc_rbp;
        __register_t    mc_r10;
        __register_t    mc_r11;
        __register_t    mc_r12;
        __register_t    mc_r13;
        __register_t    mc_r14;
        __register_t    mc_r15;
        __register_t    mc_xflags;
        __register_t    mc_trapno;
        __register_t    mc_addr;
        __register_t    mc_flags;
        __register_t    mc_err;
        __register_t    mc_rip;
        __register_t    mc_cs;
        __register_t    mc_rflags;
        __register_t    mc_rsp;         /* machine state */
        __register_t    mc_ss;

        unsigned int    mc_len;         /* sizeof(mcontext_t) */
        unsigned int    mc_fpformat;
        unsigned int    mc_ownedfp;
        unsigned int    mc_reserved;
        unsigned int    mc_unused[8];

        /*
         * NOTE! 64-byte aligned as of here.  Also must match savefpu
         *       structure.
         */
        int             mc_fpregs[256];
} __aligned(64);

typedef struct __mcontext mcontext_t;

#define _MC_FPFMT_NODEV         0x10000 /* device not present or configured */
#define _MC_FPFMT_387           0x10001
#define _MC_FPFMT_XMM           0x10002
#define _MC_FPFMT_YMM           0x10003

#define _MC_FPOWNED_NONE        0x20000 /* FP state not used */
#define _MC_FPOWNED_FPU         0x20001 /* FP state came from FPU */
#define _MC_FPOWNED_PCB         0x20002 /* FP state came from PCB */

#endif /* !_CPU_UCONTEXT_H_ */