| 1 | /*
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| 2 | * Copyright (c) 2001-2004 Jakub Jermar
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| 3 | * All rights reserved.
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| 4 | *
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| 5 | * Redistribution and use in source and binary forms, with or without
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| 6 | * modification, are permitted provided that the following conditions
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| 7 | * are met:
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| 8 | *
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| 9 | * - Redistributions of source code must retain the above copyright
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| 10 | * notice, this list of conditions and the following disclaimer.
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| 11 | * - Redistributions in binary form must reproduce the above copyright
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| 12 | * notice, this list of conditions and the following disclaimer in the
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| 13 | * documentation and/or other materials provided with the distribution.
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| 14 | * - The name of the author may not be used to endorse or promote products
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| 15 | * derived from this software without specific prior written permission.
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| 16 | *
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| 17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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| 18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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| 19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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| 20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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| 21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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| 22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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| 23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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| 24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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| 25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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| 26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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| 27 | */
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| 28 |
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| 29 | /** @addtogroup ia32interrupt
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| 30 | * @{
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| 31 | */
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| 32 | /** @file
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| 33 | */
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| 34 |
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| 35 | #ifndef KERN_ia32_ISTATE_H_
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| 36 | #define KERN_ia32_ISTATE_H_
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| 37 |
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| 38 | #include <trace.h>
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| 39 |
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| 40 | typedef struct istate {
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| 41 | /*
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| 42 | * The strange order of the GPRs is given by the requirement to use the
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| 43 | * istate structure for both regular interrupts and exceptions as well
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| 44 | * as for syscall handlers which use this order as an optimization.
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| 45 | */
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| 46 | uint32_t edx;
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| 47 | uint32_t ecx;
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| 48 | uint32_t ebx;
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| 49 | uint32_t esi;
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| 50 | uint32_t edi;
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| 51 | uint32_t ebp;
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| 52 | uint32_t eax;
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| 53 |
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| 54 | uint32_t ebp_frame; /* imitation of frame pointer linkage */
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| 55 | uint32_t eip_frame; /* imitation of return address linkage */
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| 56 |
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| 57 | uint32_t gs;
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| 58 | uint32_t fs;
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| 59 | uint32_t es;
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| 60 | uint32_t ds;
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| 61 |
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| 62 | uint32_t error_word; /* real or fake error word */
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| 63 | uint32_t eip;
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| 64 | uint32_t cs;
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| 65 | uint32_t eflags;
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| 66 | uint32_t esp; /* only if istate_t is from uspace */
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| 67 | uint32_t ss; /* only if istate_t is from uspace */
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| 68 | } istate_t;
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| 69 |
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| 70 | /** Return true if exception happened while in userspace */
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| 71 | NO_TRACE static inline int istate_from_uspace(istate_t *istate)
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| 72 | {
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| 73 | return !(istate->eip & UINT32_C(0x80000000));
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| 74 | }
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| 75 |
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| 76 | NO_TRACE static inline void istate_set_retaddr(istate_t *istate,
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| 77 | uintptr_t retaddr)
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| 78 | {
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| 79 | istate->eip = retaddr;
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| 80 | }
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| 81 |
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| 82 | NO_TRACE static inline uintptr_t istate_get_pc(istate_t *istate)
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| 83 | {
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| 84 | return istate->eip;
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| 85 | }
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| 86 |
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| 87 | NO_TRACE static inline uintptr_t istate_get_fp(istate_t *istate)
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| 88 | {
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| 89 | return istate->ebp;
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| 90 | }
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| 91 |
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| 92 | #endif
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| 93 |
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| 94 | /** @}
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| 95 | */
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