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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 1901 | serge | 1 | /* |
| 2 | * Mesa 3-D graphics library |
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| 3 | * Version: 7.9 |
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| 4 | * |
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| 5 | * Copyright (C) 2010 LunarG Inc. |
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| 6 | * |
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| 7 | * Permission is hereby granted, free of charge, to any person obtaining a |
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| 8 | * copy of this software and associated documentation files (the "Software"), |
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| 9 | * to deal in the Software without restriction, including without limitation |
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| 10 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, |
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| 11 | * and/or sell copies of the Software, and to permit persons to whom the |
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| 12 | * Software is furnished to do so, subject to the following conditions: |
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| 13 | * |
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| 14 | * The above copyright notice and this permission notice shall be included |
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| 15 | * in all copies or substantial portions of the Software. |
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| 16 | * |
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| 17 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
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| 18 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
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| 19 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
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| 20 | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
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| 21 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING |
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| 22 | * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER |
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| 23 | * DEALINGS IN THE SOFTWARE. |
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| 24 | * |
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| 25 | * Authors: |
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| 26 | * Chia-I Wu |
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| 27 | */ |
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| 28 | |||
| 29 | #include |
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| 30 | #include "u_execmem.h" |
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| 31 | #include "u_macros.h" |
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| 32 | |||
| 33 | #define X86_ENTRY_SIZE 32 |
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| 34 | |||
| 35 | __asm__(".text"); |
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| 36 | |||
| 37 | #define STUB_ASM_ENTRY(func) \ |
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| 38 | ".globl " func "\n" \ |
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| 39 | ".type " func ", @function\n" \ |
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| 40 | ".balign 32\n" \ |
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| 41 | func ":" |
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| 42 | |||
| 43 | #define STUB_ASM_CODE(slot) \ |
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| 44 | "movl u_current_table, %eax\n\t" \ |
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| 45 | "testl %eax, %eax\n\t" \ |
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| 46 | "je 1f\n\t" \ |
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| 47 | "jmp *(4 * " slot ")(%eax)\n" \ |
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| 48 | "1:\n\t" \ |
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| 49 | "call u_current_get_internal\n\t"\ |
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| 50 | "jmp *(4 * " slot ")(%eax)" |
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| 51 | |||
| 52 | #define MAPI_TMP_STUB_ASM_GCC |
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| 53 | #include "mapi_tmp.h" |
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| 54 | |||
| 55 | __asm__(".balign 32\n" |
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| 56 | "x86_entry_end:"); |
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| 57 | |||
| 58 | void |
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| 59 | entry_patch_public(void) |
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| 60 | { |
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| 61 | } |
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| 62 | |||
| 63 | void |
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| 64 | entry_patch(mapi_func entry, int slot) |
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| 65 | { |
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| 66 | char *code = (char *) entry; |
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| 67 | |||
| 68 | *((unsigned long *) (code + 11)) = slot * sizeof(mapi_func); |
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| 69 | *((unsigned long *) (code + 22)) = slot * sizeof(mapi_func); |
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| 70 | } |
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| 71 | |||
| 72 | mapi_func |
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| 73 | entry_generate(int slot) |
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| 74 | { |
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| 75 | extern const char x86_entry_end[]; |
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| 76 | const char *code_templ = x86_entry_end - X86_ENTRY_SIZE; |
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| 77 | void *code; |
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| 78 | mapi_func entry; |
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| 79 | |||
| 80 | code = u_execmem_alloc(X86_ENTRY_SIZE); |
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| 81 | if (!code) |
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| 82 | return NULL; |
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| 83 | |||
| 84 | memcpy(code, code_templ, X86_ENTRY_SIZE); |
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| 85 | entry = (mapi_func) code; |
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| 86 | entry_patch(entry, slot); |
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| 87 | |||
| 88 | return entry; |
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| 89 | } |