| 0,0 → 1,112 |
|---|
| /* |
| * Mesa 3-D graphics library |
| * |
| * Copyright (C) 2010 LunarG Inc. |
| * |
| * Permission is hereby granted, free of charge, to any person obtaining a |
| * copy of this software and associated documentation files (the "Software"), |
| * to deal in the Software without restriction, including without limitation |
| * the rights to use, copy, modify, merge, publish, distribute, sublicense, |
| * and/or sell copies of the Software, and to permit persons to whom the |
| * Software is furnished to do so, subject to the following conditions: |
| * |
| * The above copyright notice and this permission notice shall be included |
| * in all copies or substantial portions of the Software. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL |
| * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING |
| * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER |
| * DEALINGS IN THE SOFTWARE. |
| * |
| * Authors: |
| * Chia-I Wu <olv@lunarg.com> |
| */ |
| |
| #include "u_macros.h" |
| |
| __asm__(".text\n" |
| ".balign 32\n" |
| "x86_64_entry_start:"); |
| |
| #define STUB_ASM_ENTRY(func) \ |
| ".globl " func "\n" \ |
| ".type " func ", @function\n" \ |
| ".balign 32\n" \ |
| func ":" |
| |
| #define STUB_ASM_CODE(slot) \ |
| "movq " ENTRY_CURRENT_TABLE "@GOTTPOFF(%rip), %rax\n\t" \ |
| "movq %fs:(%rax), %r11\n\t" \ |
| "jmp *(8 * " slot ")(%r11)" |
| |
| #define MAPI_TMP_STUB_ASM_GCC |
| #include "mapi_tmp.h" |
| |
| #ifndef MAPI_MODE_BRIDGE |
| |
| __asm__("x86_64_current_tls:\n\t" |
| "movq " ENTRY_CURRENT_TABLE "@GOTTPOFF(%rip), %rax\n\t" |
| "ret"); |
| |
| extern unsigned long |
| x86_64_current_tls(); |
| |
| #include <string.h> |
| #include "u_execmem.h" |
| |
| void |
| entry_patch_public(void) |
| { |
| } |
| |
| static char |
| x86_64_entry_start[]; |
| |
| mapi_func |
| entry_get_public(int slot) |
| { |
| return (mapi_func) (x86_64_entry_start + slot * 32); |
| } |
| |
| void |
| entry_patch(mapi_func entry, int slot) |
| { |
| char *code = (char *) entry; |
| *((unsigned int *) (code + 12)) = slot * sizeof(mapi_func); |
| } |
| |
| mapi_func |
| entry_generate(int slot) |
| { |
| const char code_templ[16] = { |
| /* movq %fs:0, %r11 */ |
| 0x64, 0x4c, 0x8b, 0x1c, 0x25, 0x00, 0x00, 0x00, 0x00, |
| /* jmp *0x1234(%r11) */ |
| 0x41, 0xff, 0xa3, 0x34, 0x12, 0x00, 0x00, |
| }; |
| unsigned long addr; |
| void *code; |
| mapi_func entry; |
| |
| addr = x86_64_current_tls(); |
| if ((addr >> 32) != 0xffffffff) |
| return NULL; |
| addr &= 0xffffffff; |
| |
| code = u_execmem_alloc(sizeof(code_templ)); |
| if (!code) |
| return NULL; |
| |
| memcpy(code, code_templ, sizeof(code_templ)); |
| |
| *((unsigned int *) (code + 5)) = addr; |
| entry = (mapi_func) code; |
| entry_patch(entry, slot); |
| |
| return entry; |
| } |
| |
| #endif /* MAPI_MODE_BRIDGE */ |