| 1 | /* Copyright (c) 2014 Jakub Jermar
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| 2 | * All rights preserved.
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| 3 | *
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| 4 | * Redistribution and use in source and binary forms, with or without
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| 5 | * modification, are permitted provided that the following conditions
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| 6 | * are met:
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| 7 | *
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| 8 | * - Redistributions of source code must retain the above copyright
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| 9 | * notice, this list of conditions and the following disclaimer.
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| 10 | * - Redistributions in binary form must reproduce the above copyright
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| 11 | * notice, this list of conditions and the following disclaimer in the
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| 12 | * documentation and/or other materials provided with the distribution.
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| 13 | * - The name of the author may not be used to endorse or promote products
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| 14 | * derived from this software without specific prior written permission.
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| 15 | *
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| 16 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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| 17 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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| 18 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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| 19 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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| 20 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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| 21 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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| 22 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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| 23 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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| 24 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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| 25 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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| 26 | */
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| 27 |
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| 28 | #pragma once
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| 29 | #include <stdint.h>
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| 30 |
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| 31 | /*
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| 32 | * The strange order of the GPRs is given by the requirement to use the
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| 33 | * istate structure for both regular interrupts and exceptions as well
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| 34 | * as for syscall handlers which use this order as an optimization.
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| 35 | */
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| 36 | typedef struct istate {
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| 37 | uint32_t edx;
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| 38 | uint32_t ecx;
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| 39 | uint32_t ebx;
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| 40 | uint32_t esi;
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| 41 | uint32_t edi;
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| 42 | uint32_t ebp;
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| 43 | uint32_t eax;
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| 44 | /* imitation of frame pointer linkage */
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| 45 | uint32_t ebp_frame;
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| 46 | /* imitation of return address linkage */
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| 47 | uint32_t eip_frame;
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| 48 | uint32_t gs;
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| 49 | uint32_t fs;
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| 50 | uint32_t es;
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| 51 | uint32_t ds;
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| 52 | /* real or fake error word */
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| 53 | uint32_t error_word;
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| 54 | uint32_t eip;
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| 55 | uint32_t cs;
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| 56 | uint32_t eflags;
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| 57 | /* only if istate_t is from uspace */
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| 58 | uint32_t esp;
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| 59 | /* only if istate_t is from uspace */
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| 60 | uint32_t ss;
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| 61 | } istate_t;
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| 62 |
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