source: mainline/kernel/arch/ia32/include/context.h@ c7fbb90

lfn serial ticket/834-toolchain-update topic/msim-upgrade topic/simplify-dev-export
Last change on this file since c7fbb90 was dc0b964, checked in by Martin Decky <martin@…>, 15 years ago
  • do not hardwire PRI??? formatting macros in the sources, use autotool to detect the correct values
  • use autotool to detect correct values for integer literal macros (UINT32_C, etc.)
  • start using portable UINT??_C style macros for integer constants
  • Property mode set to 100644
File size: 2.3 KB
Line 
1/*
2 * Copyright (c) 2001-2004 Jakub Jermar
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 *
9 * - Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * - Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
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
15 * derived from this software without specific prior written permission.
16 *
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
19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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
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
26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 */
28
29/** @addtogroup ia32
30 * @{
31 */
32/** @file
33 */
34
35#ifndef KERN_ia32_CONTEXT_H_
36#define KERN_ia32_CONTEXT_H_
37
38#ifdef KERNEL
39
40#include <typedefs.h>
41
42#define STACK_ITEM_SIZE 4
43
44/*
45 * Both context_save() and context_restore() eat two doublewords from the stack.
46 * First for pop of the saved register, second during ret instruction.
47 *
48 * One item is put onto stack to support get_stack_base().
49 */
50#define SP_DELTA (8 + STACK_ITEM_SIZE)
51
52#define context_set(c, _pc, stack, size) \
53 do { \
54 (c)->pc = (uintptr_t) (_pc); \
55 (c)->sp = ((uintptr_t) (stack)) + (size) - SP_DELTA; \
56 (c)->ebp = 0; \
57 } while (0)
58
59#endif /* KERNEL */
60
61/*
62 * Only save registers that must be preserved across
63 * function calls.
64 */
65typedef struct {
66 uintptr_t sp;
67 uintptr_t pc;
68 uint32_t ebx;
69 uint32_t esi;
70 uint32_t edi;
71 uint32_t ebp;
72 ipl_t ipl;
73} __attribute__ ((packed)) context_t;
74
75#endif
76
77/** @}
78 */
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