| 1 | /*
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| 2 | * Copyright (c) 2008 Josef Cejka
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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 ia32
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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_CONTEXT_OFFSET_H_
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| 36 | #define KERN_ia32_CONTEXT_OFFSET_H_
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| 37 |
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| 38 | #define OFFSET_SP 0x00
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| 39 | #define OFFSET_PC 0x04
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| 40 | #define OFFSET_EBX 0x08
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| 41 | #define OFFSET_ESI 0x0C
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| 42 | #define OFFSET_EDI 0x10
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| 43 | #define OFFSET_EBP 0x14
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| 44 |
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| 45 | #ifdef KERNEL
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| 46 | #define OFFSET_IPL 0x18
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| 47 | #else
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| 48 | #define OFFSET_TLS 0x18
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| 49 | #endif
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| 50 |
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| 51 | #ifdef __ASM__
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| 52 |
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| 53 | # ctx: address of the structure with saved context
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| 54 | # pc: return address
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| 55 |
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| 56 | .macro CONTEXT_SAVE_ARCH_CORE ctx:req pc:req
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| 57 | movl %esp,OFFSET_SP(\ctx) # %esp -> ctx->sp
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| 58 | movl \pc,OFFSET_PC(\ctx) # %eip -> ctx->pc
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| 59 | movl %ebx,OFFSET_EBX(\ctx) # %ebx -> ctx->ebx
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| 60 | movl %esi,OFFSET_ESI(\ctx) # %esi -> ctx->esi
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| 61 | movl %edi,OFFSET_EDI(\ctx) # %edi -> ctx->edi
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| 62 | movl %ebp,OFFSET_EBP(\ctx) # %ebp -> ctx->ebp
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| 63 | .endm
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| 64 |
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| 65 | # ctx: address of the structure with saved context
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| 66 |
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| 67 | .macro CONTEXT_RESTORE_ARCH_CORE ctx:req pc:req
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| 68 | movl OFFSET_SP(\ctx),%esp # ctx->sp -> %esp
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| 69 | movl OFFSET_PC(\ctx),\pc # ctx->pc -> \pc
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| 70 | movl OFFSET_EBX(\ctx),%ebx # ctx->ebx -> %ebx
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| 71 | movl OFFSET_ESI(\ctx),%esi # ctx->esi -> %esi
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| 72 | movl OFFSET_EDI(\ctx),%edi # ctx->edi -> %edi
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| 73 | movl OFFSET_EBP(\ctx),%ebp # ctx->ebp -> %ebp
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| 74 | .endm
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| 75 |
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| 76 | #endif /* __ASM__ */
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| 77 |
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| 78 | #endif
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| 79 |
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| 80 | /** @}
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| 81 | */
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