Go to most recent revision | Details | Last modification | View Log | RSS feed
| Rev | Author | Line No. | Line |
|---|---|---|---|
| 1901 | serge | 1 | /* |
| 2 | * Mesa 3-D graphics library |
||
| 3 | * Version: 7.9 |
||
| 4 | * |
||
| 5 | * Copyright (C) 2010 LunarG Inc. |
||
| 6 | * |
||
| 7 | * Permission is hereby granted, free of charge, to any person obtaining a |
||
| 8 | * copy of this software and associated documentation files (the "Software"), |
||
| 9 | * to deal in the Software without restriction, including without limitation |
||
| 10 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, |
||
| 11 | * and/or sell copies of the Software, and to permit persons to whom the |
||
| 12 | * Software is furnished to do so, subject to the following conditions: |
||
| 13 | * |
||
| 14 | * The above copyright notice and this permission notice shall be included |
||
| 15 | * in all copies or substantial portions of the Software. |
||
| 16 | * |
||
| 17 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
||
| 18 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
||
| 19 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
||
| 20 | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
||
| 21 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING |
||
| 22 | * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER |
||
| 23 | * DEALINGS IN THE SOFTWARE. |
||
| 24 | * |
||
| 25 | * Authors: |
||
| 26 | * Chia-I Wu |
||
| 27 | */ |
||
| 28 | |||
| 29 | #include |
||
| 30 | #include "u_execmem.h" |
||
| 31 | #include "u_macros.h" |
||
| 32 | |||
| 33 | __asm__(".text"); |
||
| 34 | |||
| 35 | __asm__("x86_64_current_tls:\n\t" |
||
| 36 | "movq u_current_table_tls@GOTTPOFF(%rip), %rax\n\t" |
||
| 37 | "ret"); |
||
| 38 | |||
| 39 | #define STUB_ASM_ENTRY(func) \ |
||
| 40 | ".globl " func "\n" \ |
||
| 41 | ".type " func ", @function\n" \ |
||
| 42 | ".balign 32\n" \ |
||
| 43 | func ":" |
||
| 44 | |||
| 45 | #define STUB_ASM_CODE(slot) \ |
||
| 46 | "movq u_current_table_tls@GOTTPOFF(%rip), %rax\n\t" \ |
||
| 47 | "movq %fs:(%rax), %r11\n\t" \ |
||
| 48 | "jmp *(8 * " slot ")(%r11)" |
||
| 49 | |||
| 50 | #define MAPI_TMP_STUB_ASM_GCC |
||
| 51 | #include "mapi_tmp.h" |
||
| 52 | |||
| 53 | extern unsigned long |
||
| 54 | x86_64_current_tls(); |
||
| 55 | |||
| 56 | void |
||
| 57 | entry_patch_public(void) |
||
| 58 | { |
||
| 59 | } |
||
| 60 | |||
| 61 | void |
||
| 62 | entry_patch(mapi_func entry, int slot) |
||
| 63 | { |
||
| 64 | char *code = (char *) entry; |
||
| 65 | *((unsigned int *) (code + 12)) = slot * sizeof(mapi_func); |
||
| 66 | } |
||
| 67 | |||
| 68 | mapi_func |
||
| 69 | entry_generate(int slot) |
||
| 70 | { |
||
| 71 | const char code_templ[16] = { |
||
| 72 | /* movq %fs:0, %r11 */ |
||
| 73 | 0x64, 0x4c, 0x8b, 0x1c, 0x25, 0x00, 0x00, 0x00, 0x00, |
||
| 74 | /* jmp *0x1234(%r11) */ |
||
| 75 | 0x41, 0xff, 0xa3, 0x34, 0x12, 0x00, 0x00, |
||
| 76 | }; |
||
| 77 | unsigned long addr; |
||
| 78 | void *code; |
||
| 79 | mapi_func entry; |
||
| 80 | |||
| 81 | addr = x86_64_current_tls(); |
||
| 82 | if ((addr >> 32) != 0xffffffff) |
||
| 83 | return NULL; |
||
| 84 | addr &= 0xffffffff; |
||
| 85 | |||
| 86 | code = u_execmem_alloc(sizeof(code_templ)); |
||
| 87 | if (!code) |
||
| 88 | return NULL; |
||
| 89 | |||
| 90 | memcpy(code, code_templ, sizeof(code_templ)); |
||
| 91 | |||
| 92 | *((unsigned int *) (code + 5)) = addr; |
||
| 93 | entry = (mapi_func) code; |
||
| 94 | entry_patch(entry, slot); |
||
| 95 | |||
| 96 | return entry; |
||
| 97 | } |