diff options
| -rw-r--r-- | src/mapi/mapi/entry.c | 2 | ||||
| -rw-r--r-- | src/mapi/mapi/entry_x86-64_tls.h | 97 |
2 files changed, 99 insertions, 0 deletions
diff --git a/src/mapi/mapi/entry.c b/src/mapi/mapi/entry.c index 968aa445285..fdf2a89c52f 100644 --- a/src/mapi/mapi/entry.c +++ b/src/mapi/mapi/entry.c @@ -34,6 +34,8 @@ # else # include "entry_x86_tsd.h" # endif +#elif defined(USE_X86_64_ASM) && defined(__GNUC__) && defined(GLX_USE_TLS) +# include "entry_x86-64_tls.h" #else #include <stdlib.h> diff --git a/src/mapi/mapi/entry_x86-64_tls.h b/src/mapi/mapi/entry_x86-64_tls.h new file mode 100644 index 00000000000..d4c9907b895 --- /dev/null +++ b/src/mapi/mapi/entry_x86-64_tls.h @@ -0,0 +1,97 @@ +/* + * Mesa 3-D graphics library + * Version: 7.9 + * + * 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 <[email protected]> + */ + +#include <string.h> +#include "u_execmem.h" +#include "u_macros.h" + +__asm__(".text"); + +__asm__("x86_64_current_tls:\n\t" + "movq _glapi_tls_Dispatch@GOTTPOFF(%rip), %rax\n\t" + "ret"); + +#define STUB_ASM_ENTRY(func) \ + ".globl " func "\n" \ + ".type " func ", @function\n" \ + ".balign 32\n" \ + func ":" + +#define STUB_ASM_CODE(slot) \ + "movq _glapi_tls_Dispatch@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" + +extern unsigned long +x86_64_current_tls(); + +void +entry_patch_public(void) +{ +} + +void +entry_patch(mapi_func entry, int slot) +{ + void *code = (void *) 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; +} |