LCOM1920-T02G10

/*        $NetBSD: mcontext.h,v 1.12 2014/02/15 22:20:42 dsl Exp $        */

/*-

 * Copyright (c) 1999 The NetBSD Foundation, Inc.

 * All rights reserved.

 *

 * This code is derived from software contributed to The NetBSD Foundation

 * by Klaus Klein.

 *

 * 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.

 *

 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. 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 FOUNDATION 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.

 */

#ifndef _I386_MCONTEXT_H_

#define _I386_MCONTEXT_H_

/*

 * mcontext extensions to handle signal delivery.

 */

#define _UC_SETSTACK        0x00010000

#define _UC_CLRSTACK        0x00020000

#define _UC_VM                0x00040000

#define        _UC_TLSBASE        0x00080000

/*

 * Layout of mcontext_t according to the System V Application Binary Interface,

 * Intel386(tm) Architecture Processor Supplement, Fourth Edition.

 */  

/*

 * General register state

 */

#define _NGREG                19

typedef        int                __greg_t;

typedef        __greg_t        __gregset_t[_NGREG];

#define _REG_GS                0

#define _REG_FS                1

#define _REG_ES                2

#define _REG_DS                3

#define _REG_EDI        4

#define _REG_ESI        5

#define _REG_EBP        6

#define _REG_ESP        7

#define _REG_EBX        8

#define _REG_EDX        9

#define _REG_ECX        10

#define _REG_EAX        11

#define _REG_TRAPNO        12

#define _REG_ERR        13

#define _REG_EIP        14

#define _REG_CS                15

#define _REG_EFL        16

#define _REG_UESP        17

#define _REG_SS                18

/*

 * Floating point register state

 */

typedef struct {

        union {

                struct {

                        int        __fp_state[27];        /* Environment and registers */

                } __fpchip_state;        /* x87 regs in fsave format */

                struct {

                        char        __fp_xmm[512];

                } __fp_xmm_state;        /* x87 and xmm regs in fxsave format */

                int        __fp_fpregs[128];

        } __fp_reg_set;

        int         __fp_pad[33];                        /* Historic padding */

} __fpregset_t;

__CTASSERT(sizeof (__fpregset_t) == 512 + 33 * 4);

typedef struct {

        __gregset_t        __gregs;

        __fpregset_t        __fpregs;

        __greg_t        _mc_tlsbase;

#ifdef __minix

        int        mc_magic;

        int        mc_flags;

#endif

} mcontext_t;

#define _UC_FXSAVE        0x20        /* FP state is in FXSAVE format in XMM space */

#define _UC_MACHINE_PAD        4        /* Padding appended to ucontext_t */

#define _UC_UCONTEXT_ALIGN        (~0xf)

#ifdef _KERNEL_OPT

#include "opt_vm86.h"

#ifdef VM86

/*#include <machine/psl.h>*/

#define PSL_VM 0x00020000

#define _UC_MACHINE_SP(uc) ((uc)->uc_mcontext.__gregs[_REG_UESP] + \

        ((uc)->uc_mcontext.__gregs[_REG_EFL] & PSL_VM ? \

         ((uc)->uc_mcontext.__gregs[_REG_SS] << 4) : 0))

#endif /* VM86 */

#endif /* _KERNEL_OPT */

#ifndef _UC_MACHINE_SP

#define _UC_MACHINE_SP(uc)        ((uc)->uc_mcontext.__gregs[_REG_UESP])

#endif

#define _UC_MACHINE_PC(uc)        ((uc)->uc_mcontext.__gregs[_REG_EIP])

#define _UC_MACHINE_INTRV(uc)        ((uc)->uc_mcontext.__gregs[_REG_EAX])

#define        _UC_MACHINE_SET_PC(uc, pc)        _UC_MACHINE_PC(uc) = (pc)

#if defined(__minix)

#define        _UC_MACHINE_STACK(uc)                ((uc)->uc_mcontext.__gregs[_REG_ESP])

#define        _UC_MACHINE_SET_STACK(uc, esp)        _UC_MACHINE_STACK(uc) = (esp)

#define        _UC_MACHINE_EBP(uc)                ((uc)->uc_mcontext.__gregs[_REG_EBP])

#define        _UC_MACHINE_SET_EBP(uc, ebp)        _UC_MACHINE_EBP(uc) = (ebp)

#define        _UC_MACHINE_ESI(uc)                ((uc)->uc_mcontext.__gregs[_REG_ESI])

#define        _UC_MACHINE_SET_ESI(uc, esi)        _UC_MACHINE_ESI(uc) = (esi)

int setmcontext(const mcontext_t *mcp);

int getmcontext(mcontext_t *mcp);

#define MCF_MAGIC 0xc0ffee

#define _MC_FPU_SAVED        0x001

#endif /* defined(__minix) */

#define        __UCONTEXT_SIZE        776

static __inline void *

__lwp_getprivate_fast(void)

{

        void *__tmp;

        __asm volatile("movl %%gs:0, %0" : "=r" (__tmp));

        return __tmp;

}

#endif        /* !_I386_MCONTEXT_H_ */