context.h

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/*
 * Copyright (c) 2014, Michael Müller
 * Copyright (c) 2014, Sebastian Lackner
 * 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.
 * 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 COPYRIGHT HOLDERS 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 COPYRIGHT OWNER 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 _H_CONTEXT_
#define _H_CONTEXT_

struct taskContext
{
    uint16_t prevTask;              /* 0x00 */
    uint16_t __res1;

    uint32_t esp0;                  /* 0x04 */
    uint16_t ss0;                   /* 0x08 */
    uint16_t __res2;

    uint32_t esp1;                  /* 0x0C */
    uint16_t ss1;                   /* 0x10 */
    uint16_t __res3;

    uint32_t esp2;                  /* 0x14 */
    uint16_t ss2;                   /* 0x18 */
    uint16_t __res4;

    uint32_t cr3;                   /* 0x1C */
    uint32_t eip;                   /* 0x20 */
    uint32_t eflags;                /* 0x24 */

    uint32_t eax;                   /* 0x28 */
    uint32_t ecx;                   /* 0x2C */
    uint32_t edx;                   /* 0x30 */
    uint32_t ebx;                   /* 0x34 */
    uint32_t esp;                   /* 0x38 */
    uint32_t ebp;                   /* 0x3C */
    uint32_t esi;                   /* 0x40 */
    uint32_t edi;                   /* 0x44 */

    uint16_t es;                    /* 0x48 */
    uint16_t __res5;
    uint16_t cs;                    /* 0x4C */
    uint16_t __res6;
    uint16_t ss;                    /* 0x50 */
    uint16_t __res7;
    uint16_t ds;                    /* 0x54 */
    uint16_t __res8;
    uint16_t fs;                    /* 0x58 */
    uint16_t __res9;
    uint16_t gs;                    /* 0x5C */
    uint16_t __res10;

    uint16_t ldt;                   /* 0x60 */
    uint16_t __res11;
    uint16_t __res12;               /* 0x64 */
    uint16_t iomap;
} __attribute__((packed));

struct fpuContext
{
    uint16_t controlWord;
    uint16_t __res1;
    uint16_t statusWord;
    uint16_t __res2;
    uint16_t tagWord;
    uint16_t __res3;
    uint32_t codePointer;
    uint16_t codeSegment;
    uint16_t __res4;
    uint32_t dataPointer;
    uint16_t dataSegment;
    uint16_t __res5;
    uint8_t  registerArea[80];
} __attribute__((packed));

#endif /* _H_CONTEXT_ */