Chia-I Wu | de39940 | 2010-04-22 16:22:13 +0800 | [diff] [blame] | 1 | /* |
| 2 | * Mesa 3-D graphics library |
Chia-I Wu | de39940 | 2010-04-22 16:22:13 +0800 | [diff] [blame] | 3 | * |
| 4 | * Copyright (C) 2010 LunarG Inc. |
| 5 | * |
| 6 | * Permission is hereby granted, free of charge, to any person obtaining a |
| 7 | * copy of this software and associated documentation files (the "Software"), |
| 8 | * to deal in the Software without restriction, including without limitation |
| 9 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, |
| 10 | * and/or sell copies of the Software, and to permit persons to whom the |
| 11 | * Software is furnished to do so, subject to the following conditions: |
| 12 | * |
| 13 | * The above copyright notice and this permission notice shall be included |
| 14 | * in all copies or substantial portions of the Software. |
| 15 | * |
| 16 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| 17 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| 18 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
| 19 | * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| 20 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING |
| 21 | * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER |
| 22 | * DEALINGS IN THE SOFTWARE. |
| 23 | * |
| 24 | * Authors: |
| 25 | * Chia-I Wu <olv@lunarg.com> |
| 26 | */ |
| 27 | |
Eric Engestrom | 4da9f7e | 2016-07-22 10:24:03 +0100 | [diff] [blame] | 28 | #ifdef HAVE_FUNC_ATTRIBUTE_VISIBILITY |
Matt Turner | 5ec140c | 2016-07-11 10:44:25 -0700 | [diff] [blame] | 29 | #define HIDDEN __attribute__((visibility("hidden"))) |
| 30 | #else |
| 31 | #define HIDDEN |
| 32 | #endif |
Chia-I Wu | de39940 | 2010-04-22 16:22:13 +0800 | [diff] [blame] | 33 | |
Chia-I Wu | 97185bf | 2010-12-17 00:24:27 +0800 | [diff] [blame] | 34 | __asm__(".text\n" |
| 35 | ".balign 32\n" |
Chia-I Wu | e6a7ef3 | 2010-12-24 15:06:41 +0800 | [diff] [blame] | 36 | "x86_64_entry_start:"); |
| 37 | |
Chia-I Wu | de39940 | 2010-04-22 16:22:13 +0800 | [diff] [blame] | 38 | #define STUB_ASM_ENTRY(func) \ |
| 39 | ".globl " func "\n" \ |
| 40 | ".type " func ", @function\n" \ |
| 41 | ".balign 32\n" \ |
| 42 | func ":" |
| 43 | |
Grazvydas Ignotas | 8945836 | 2017-01-08 19:38:09 +0200 | [diff] [blame] | 44 | #ifndef __ILP32__ |
| 45 | |
Chia-I Wu | de39940 | 2010-04-22 16:22:13 +0800 | [diff] [blame] | 46 | #define STUB_ASM_CODE(slot) \ |
Chia-I Wu | 96c52d1 | 2010-08-24 15:51:57 +0800 | [diff] [blame] | 47 | "movq " ENTRY_CURRENT_TABLE "@GOTTPOFF(%rip), %rax\n\t" \ |
Chia-I Wu | de39940 | 2010-04-22 16:22:13 +0800 | [diff] [blame] | 48 | "movq %fs:(%rax), %r11\n\t" \ |
| 49 | "jmp *(8 * " slot ")(%r11)" |
| 50 | |
Grazvydas Ignotas | 8945836 | 2017-01-08 19:38:09 +0200 | [diff] [blame] | 51 | #else |
| 52 | |
| 53 | #define STUB_ASM_CODE(slot) \ |
| 54 | "movq " ENTRY_CURRENT_TABLE "@GOTTPOFF(%rip), %rax\n\t" \ |
| 55 | "movl %fs:(%rax), %r11d\n\t" \ |
| 56 | "movl 4*" slot "(%r11d), %r11d\n\t" \ |
| 57 | "jmp *%r11" |
| 58 | |
| 59 | #endif |
| 60 | |
Chia-I Wu | de39940 | 2010-04-22 16:22:13 +0800 | [diff] [blame] | 61 | #define MAPI_TMP_STUB_ASM_GCC |
| 62 | #include "mapi_tmp.h" |
| 63 | |
Chia-I Wu | 97185bf | 2010-12-17 00:24:27 +0800 | [diff] [blame] | 64 | #ifndef MAPI_MODE_BRIDGE |
| 65 | |
Chia-I Wu | 97185bf | 2010-12-17 00:24:27 +0800 | [diff] [blame] | 66 | #include <string.h> |
| 67 | #include "u_execmem.h" |
| 68 | |
Chia-I Wu | de39940 | 2010-04-22 16:22:13 +0800 | [diff] [blame] | 69 | void |
| 70 | entry_patch_public(void) |
| 71 | { |
| 72 | } |
| 73 | |
Matt Turner | 5ec140c | 2016-07-11 10:44:25 -0700 | [diff] [blame] | 74 | extern char |
| 75 | x86_64_entry_start[] HIDDEN; |
Benjamin Franzke | 3e1caf5 | 2011-06-08 15:50:25 +0200 | [diff] [blame] | 76 | |
Chia-I Wu | e6a7ef3 | 2010-12-24 15:06:41 +0800 | [diff] [blame] | 77 | mapi_func |
| 78 | entry_get_public(int slot) |
| 79 | { |
Chia-I Wu | e6a7ef3 | 2010-12-24 15:06:41 +0800 | [diff] [blame] | 80 | return (mapi_func) (x86_64_entry_start + slot * 32); |
| 81 | } |
| 82 | |
Chia-I Wu | de39940 | 2010-04-22 16:22:13 +0800 | [diff] [blame] | 83 | void |
| 84 | entry_patch(mapi_func entry, int slot) |
| 85 | { |
Chia-I Wu | ebeb4a7 | 2010-09-30 17:09:59 +0800 | [diff] [blame] | 86 | char *code = (char *) entry; |
Grazvydas Ignotas | 8945836 | 2017-01-08 19:38:09 +0200 | [diff] [blame] | 87 | int offset = 12; |
| 88 | #ifdef __ILP32__ |
| 89 | offset = 13; |
| 90 | #endif |
| 91 | *((unsigned int *) (code + offset)) = slot * sizeof(mapi_func); |
Chia-I Wu | de39940 | 2010-04-22 16:22:13 +0800 | [diff] [blame] | 92 | } |
| 93 | |
| 94 | mapi_func |
| 95 | entry_generate(int slot) |
| 96 | { |
Grazvydas Ignotas | 8945836 | 2017-01-08 19:38:09 +0200 | [diff] [blame] | 97 | const char code_templ[] = { |
| 98 | #ifndef __ILP32__ |
Chia-I Wu | de39940 | 2010-04-22 16:22:13 +0800 | [diff] [blame] | 99 | /* movq %fs:0, %r11 */ |
| 100 | 0x64, 0x4c, 0x8b, 0x1c, 0x25, 0x00, 0x00, 0x00, 0x00, |
| 101 | /* jmp *0x1234(%r11) */ |
| 102 | 0x41, 0xff, 0xa3, 0x34, 0x12, 0x00, 0x00, |
Grazvydas Ignotas | 8945836 | 2017-01-08 19:38:09 +0200 | [diff] [blame] | 103 | #else |
| 104 | /* movl %fs:0, %r11d */ |
| 105 | 0x64, 0x44, 0x8b, 0x1c, 0x25, 0x00, 0x00, 0x00, 0x00, |
| 106 | /* movl 0x1234(%r11d), %r11d */ |
| 107 | 0x67, 0x45, 0x8b, 0x9b, 0x34, 0x12, 0x00, 0x00, |
| 108 | /* jmp *%r11 */ |
| 109 | 0x41, 0xff, 0xe3, |
| 110 | #endif |
Chia-I Wu | de39940 | 2010-04-22 16:22:13 +0800 | [diff] [blame] | 111 | }; |
Grazvydas Ignotas | 8945836 | 2017-01-08 19:38:09 +0200 | [diff] [blame] | 112 | unsigned long long addr; |
Matt Turner | 76cd0f0 | 2015-02-27 11:42:43 -0800 | [diff] [blame] | 113 | char *code; |
Chia-I Wu | de39940 | 2010-04-22 16:22:13 +0800 | [diff] [blame] | 114 | mapi_func entry; |
| 115 | |
Matt Turner | e34834f | 2014-09-25 17:28:20 -0700 | [diff] [blame] | 116 | __asm__("movq " ENTRY_CURRENT_TABLE "@GOTTPOFF(%%rip), %0" |
| 117 | : "=r" (addr)); |
Chia-I Wu | de39940 | 2010-04-22 16:22:13 +0800 | [diff] [blame] | 118 | if ((addr >> 32) != 0xffffffff) |
| 119 | return NULL; |
| 120 | addr &= 0xffffffff; |
| 121 | |
| 122 | code = u_execmem_alloc(sizeof(code_templ)); |
| 123 | if (!code) |
| 124 | return NULL; |
| 125 | |
| 126 | memcpy(code, code_templ, sizeof(code_templ)); |
| 127 | |
| 128 | *((unsigned int *) (code + 5)) = addr; |
| 129 | entry = (mapi_func) code; |
| 130 | entry_patch(entry, slot); |
| 131 | |
| 132 | return entry; |
| 133 | } |
Chia-I Wu | 97185bf | 2010-12-17 00:24:27 +0800 | [diff] [blame] | 134 | |
| 135 | #endif /* MAPI_MODE_BRIDGE */ |