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| 1 | jermar | 1 | /* |
| 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 | |||
| 11 | jermar | 29 | #ifndef __ia32_CONTEXT_H__ |
| 30 | #define __ia32_CONTEXT_H__ |
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| 1 | jermar | 31 | |
| 32 | #include <arch/types.h> |
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| 33 | |||
| 180 | jermar | 34 | #define STACK_ITEM_SIZE 4 |
| 35 | |||
| 82 | jermar | 36 | /* |
| 37 | * Both context_save() and context_restore() eat two doublewords from the stack. |
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| 38 | * First for pop of the saved register, second during ret instruction. |
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| 180 | jermar | 39 | * |
| 40 | * One item is put onto stack to support get_stack_base(). |
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| 82 | jermar | 41 | */ |
| 180 | jermar | 42 | #define SP_DELTA (8+STACK_ITEM_SIZE) |
| 45 | vana | 43 | |
| 354 | jermar | 44 | /* |
| 45 | * Only save registers that must be preserved across |
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| 46 | * function calls. |
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| 47 | */ |
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| 1 | jermar | 48 | struct context { |
| 414 | jermar | 49 | __address sp; |
| 50 | __address pc; |
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| 1 | jermar | 51 | __u32 ebx; |
| 52 | __u32 esi; |
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| 53 | __u32 edi; |
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| 54 | __u32 ebp; |
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| 413 | jermar | 55 | ipl_t ipl; |
| 1 | jermar | 56 | } __attribute__ ((packed)); |
| 57 | |||
| 58 | #endif |