/*-
 * SPDX-License-Identifier: BSD-3-Clause
 *
 * Copyright (c) 2003 Peter Wemm
 * Copyright (c) 1999 Marcel Moolenaar
 * 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.
 */

#ifndef _X86_UCONTEXT_H_
#define _X86_UCONTEXT_H_

#ifdef __i386__
/* Keep _MC_* values similar to amd64 */
#define _MC_HASSEGS     0x1
#define _MC_HASBASES    0x2
#define _MC_HASFPXSTATE 0x4
#define _MC_FLAG_MASK   (_MC_HASSEGS | _MC_HASBASES | _MC_HASFPXSTATE)

typedef struct __mcontext {
        /*
         * The definition of mcontext_t must match the layout of
         * struct sigcontext after the sc_mask member.  This is so
         * that we can support sigcontext and ucontext_t at the same
         * time.
         */
        __register_t    mc_onstack;     /* XXX - sigcontext compat. */
        __register_t    mc_gs;          /* machine state (struct trapframe) */
        __register_t    mc_fs;
        __register_t    mc_es;
        __register_t    mc_ds;
        __register_t    mc_edi;
        __register_t    mc_esi;
        __register_t    mc_ebp;
        __register_t    mc_isp;
        __register_t    mc_ebx;
        __register_t    mc_edx;
        __register_t    mc_ecx;
        __register_t    mc_eax;
        __register_t    mc_trapno;
        __register_t    mc_err;
        __register_t    mc_eip;
        __register_t    mc_cs;
        __register_t    mc_eflags;
        __register_t    mc_esp;
        __register_t    mc_ss;

        int     mc_len;                 /* sizeof(mcontext_t) */
#define _MC_FPFMT_NODEV         0x10000 /* device not present or configured */
#define _MC_FPFMT_387           0x10001
#define _MC_FPFMT_XMM           0x10002
        int     mc_fpformat;
#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 */
        int     mc_ownedfp;
        __register_t mc_flags;
        /*
         * See <machine/npx.h> for the internals of mc_fpstate[].
         */
        int     mc_fpstate[128] __aligned(16);

        __register_t mc_fsbase;
        __register_t mc_gsbase;

        __register_t mc_xfpustate;
        __register_t mc_xfpustate_len;

        int     mc_spare2[4];
} mcontext_t;
#endif /* __i386__ */

#ifdef __amd64__
/*
 * mc_flags bits. Shall be in sync with TF_XXX.
 */
#define _MC_HASSEGS     0x1
#define _MC_HASBASES    0x2
#define _MC_HASFPXSTATE 0x4
#define _MC_HASTLSBASE  0x8
#define _MC_FLAG_MASK   (_MC_HASSEGS | _MC_HASBASES | _MC_HASFPXSTATE | \
    _MC_HASTLSBASE)

typedef struct __mcontext {
        /*
         * The definition of mcontext_t must match the layout of
         * struct sigcontext after the sc_mask member.  This is so
         * that we can support sigcontext and ucontext_t at the same
         * time.
         */
        __register_t    mc_onstack;     /* XXX - sigcontext compat. */
        __register_t    mc_rdi;         /* machine state (struct trapframe) */
        __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;
        __uint32_t      mc_trapno;
        __uint16_t      mc_fs;
        __uint16_t      mc_gs;
        __register_t    mc_addr;
        __uint32_t      mc_flags;
        __uint16_t      mc_es;
        __uint16_t      mc_ds;
        __register_t    mc_err;
        __register_t    mc_rip;
        __register_t    mc_cs;
        __register_t    mc_rflags;
        __register_t    mc_rsp;
        __register_t    mc_ss;

        long    mc_len;                 /* sizeof(mcontext_t) */

#define _MC_FPFMT_NODEV         0x10000 /* device not present or configured */
#define _MC_FPFMT_XMM           0x10002
        long    mc_fpformat;
#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 */
        long    mc_ownedfp;
        /*
         * See <machine/fpu.h> for the internals of mc_fpstate[].
         */
        long    mc_fpstate[64] __aligned(16);

        __register_t    mc_fsbase;
        __register_t    mc_gsbase;

        __register_t    mc_xfpustate;
        __register_t    mc_xfpustate_len;

        __register_t    mc_tlsbase;

        long    mc_spare[3];
} mcontext_t;
#endif /* __amd64__ */

#endif /* !_X86_UCONTEXT_H_ */