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1 | /* |
1 | /* |
2 | * Copyright (c) 2001-2004 Jakub Jermar |
2 | * Copyright (c) 2001-2004 Jakub Jermar |
3 | * All rights reserved. |
3 | * All rights reserved. |
4 | * |
4 | * |
5 | * Redistribution and use in source and binary forms, with or without |
5 | * Redistribution and use in source and binary forms, with or without |
6 | * modification, are permitted provided that the following conditions |
6 | * modification, are permitted provided that the following conditions |
7 | * are met: |
7 | * are met: |
8 | * |
8 | * |
9 | * - Redistributions of source code must retain the above copyright |
9 | * - Redistributions of source code must retain the above copyright |
10 | * notice, this list of conditions and the following disclaimer. |
10 | * notice, this list of conditions and the following disclaimer. |
11 | * - Redistributions in binary form must reproduce the above copyright |
11 | * - Redistributions in binary form must reproduce the above copyright |
12 | * notice, this list of conditions and the following disclaimer in the |
12 | * notice, this list of conditions and the following disclaimer in the |
13 | * documentation and/or other materials provided with the distribution. |
13 | * documentation and/or other materials provided with the distribution. |
14 | * - The name of the author may not be used to endorse or promote products |
14 | * - The name of the author may not be used to endorse or promote products |
15 | * derived from this software without specific prior written permission. |
15 | * derived from this software without specific prior written permission. |
16 | * |
16 | * |
17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
27 | */ |
27 | */ |
28 | 28 | ||
29 | /** @addtogroup ia32 |
29 | /** @addtogroup ia32 |
30 | * @{ |
30 | * @{ |
31 | */ |
31 | */ |
32 | /** @file |
32 | /** @file |
33 | */ |
33 | */ |
34 | 34 | ||
35 | #ifndef KERN_ia32_CONTEXT_H_ |
35 | #ifndef KERN_ia32_CONTEXT_H_ |
36 | #define KERN_ia32_CONTEXT_H_ |
36 | #define KERN_ia32_CONTEXT_H_ |
37 | 37 | ||
38 | #ifdef KERNEL |
38 | #ifdef KERNEL |
39 | #include <arch/types.h> |
39 | #include <arch/types.h> |
40 | 40 | ||
41 | #define STACK_ITEM_SIZE 4 |
41 | #define STACK_ITEM_SIZE 4 |
42 | 42 | ||
43 | /* |
43 | /* |
44 | * Both context_save() and context_restore() eat two doublewords from the stack. |
44 | * Both context_save() and context_restore() eat two doublewords from the stack. |
45 | * First for pop of the saved register, second during ret instruction. |
45 | * First for pop of the saved register, second during ret instruction. |
46 | * |
46 | * |
47 | * One item is put onto stack to support get_stack_base(). |
47 | * One item is put onto stack to support get_stack_base(). |
48 | */ |
48 | */ |
49 | #define SP_DELTA (8 + STACK_ITEM_SIZE) |
49 | #define SP_DELTA (8 + STACK_ITEM_SIZE) |
50 | 50 | ||
51 | #endif /* KERNEL */ |
51 | #endif /* KERNEL */ |
52 | 52 | ||
53 | /* |
53 | /* |
54 | * Only save registers that must be preserved across |
54 | * Only save registers that must be preserved across |
55 | * function calls. |
55 | * function calls. |
56 | */ |
56 | */ |
57 | typedef struct { |
57 | typedef struct { |
58 | uintptr_t sp; |
58 | uintptr_t sp; |
59 | uintptr_t pc; |
59 | uintptr_t pc; |
60 | uint32_t ebx; |
60 | uint32_t ebx; |
61 | uint32_t esi; |
61 | uint32_t esi; |
62 | uint32_t edi; |
62 | uint32_t edi; |
63 | uint32_t ebp; |
63 | uint32_t ebp; |
64 | ipl_t ipl; |
64 | ipl_t ipl; |
65 | } __attribute__ ((packed)) context_t; |
65 | } __attribute__ ((packed)) context_t; |
66 | 66 | ||
67 | #endif |
67 | #endif |
68 | 68 | ||
69 | /** @} |
69 | /** @} |
70 | */ |
70 | */ |
71 | 71 |