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2774 | cejka | 1 | /* |
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 | |||
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 | |||
35 | #ifndef KERN_ia32_CONTEXT_OFFSET_H_ |
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36 | #define KERN_ia32_CONTEXT_OFFSET_H_ |
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37 | |||
38 | #define OFFSET_SP 0x0 |
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39 | #define OFFSET_PC 0x4 |
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40 | #define OFFSET_EBX 0x8 |
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41 | #define OFFSET_ESI 0xC |
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42 | #define OFFSET_EDI 0x10 |
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43 | #define OFFSET_EBP 0x14 |
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44 | |||
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 | |||
51 | |||
52 | #ifdef __ASM__ |
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53 | |||
54 | # ctx: address of the structure with saved context |
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55 | # pc: return address |
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56 | |||
57 | .macro CONTEXT_SAVE_ARCH_CORE ctx:req pc:req |
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58 | movl %esp,OFFSET_SP(\ctx) # %esp -> ctx->sp |
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59 | movl \pc,OFFSET_PC(\ctx) # %eip -> ctx->pc |
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60 | movl %ebx,OFFSET_EBX(\ctx) # %ebx -> ctx->ebx |
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61 | movl %esi,OFFSET_ESI(\ctx) # %esi -> ctx->esi |
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62 | movl %edi,OFFSET_EDI(\ctx) # %edi -> ctx->edi |
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63 | movl %ebp,OFFSET_EBP(\ctx) # %ebp -> ctx->ebp |
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64 | .endm |
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65 | |||
66 | # ctx: address of the structure with saved context |
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67 | |||
68 | .macro CONTEXT_RESTORE_ARCH_CORE ctx:req pc:req |
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69 | movl OFFSET_SP(\ctx),%esp # ctx->sp -> %esp |
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70 | movl OFFSET_PC(\ctx),\pc # ctx->pc -> \pc |
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71 | movl OFFSET_EBX(\ctx),%ebx # ctx->ebx -> %ebx |
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72 | movl OFFSET_ESI(\ctx),%esi # ctx->esi -> %esi |
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73 | movl OFFSET_EDI(\ctx),%edi # ctx->edi -> %edi |
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74 | movl OFFSET_EBP(\ctx),%ebp # ctx->ebp -> %ebp |
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75 | .endm |
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76 | |||
77 | #endif /* __ASM__ */ |
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78 | |||
79 | #endif |
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80 | |||
81 | /** @} |
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82 | */ |
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83 |