diff options
author | Chia-I Wu <olv@lunarg.com> | 2010-04-22 15:33:43 +0800 |
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committer | Chia-I Wu <olv@lunarg.com> | 2010-05-07 10:41:12 +0800 |
commit | 56eb5d7e852ab04b45ba09831e2c8fbadcda8c40 (patch) | |
tree | 6d8363eb8b33f09a6fc0948106302d9ce37086f6 /src/mapi/mapi/entry_x86_tsd.h | |
parent | 75143ef05576ee9f25ee176bc28c3c4d03705bf5 (diff) |
mapi: Add x86 dispatcher.
Diffstat (limited to 'src/mapi/mapi/entry_x86_tsd.h')
-rw-r--r-- | src/mapi/mapi/entry_x86_tsd.h | 89 |
1 files changed, 89 insertions, 0 deletions
diff --git a/src/mapi/mapi/entry_x86_tsd.h b/src/mapi/mapi/entry_x86_tsd.h new file mode 100644 index 0000000000..d31e0676f0 --- /dev/null +++ b/src/mapi/mapi/entry_x86_tsd.h @@ -0,0 +1,89 @@ +/* + * 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 <olv@lunarg.com> + */ + +#include <string.h> +#include "u_execmem.h" +#include "u_macros.h" + +#define X86_ENTRY_SIZE 32 + +__asm__(".text"); + +#define STUB_ASM_ENTRY(func) \ + ".globl " func "\n" \ + ".type " func ", @function\n" \ + ".balign 32\n" \ + func ":" + +#define STUB_ASM_CODE(slot) \ + "movl _glapi_Dispatch, %eax\n\t" \ + "testl %eax, %eax\n\t" \ + "je 1f\n\t" \ + "jmp *(4 * " slot ")(%eax)\n" \ + "1:\n\t" \ + "call _glapi_get_dispatch\n\t" \ + "jmp *(4 * " slot ")(%eax)" + +#define MAPI_TMP_STUB_ASM_GCC +#include "mapi_tmp.h" + +__asm__(".balign 32\n" + "x86_entry_end:"); + +void +entry_patch_public(void) +{ +} + +void +entry_patch(mapi_func entry, int slot) +{ + void *code = (void *) entry; + + *((unsigned long *) (code + 11)) = slot * sizeof(mapi_func); + *((unsigned long *) (code + 22)) = slot * sizeof(mapi_func); +} + +mapi_func +entry_generate(int slot) +{ + extern const char x86_entry_end[]; + const char *code_templ = x86_entry_end - X86_ENTRY_SIZE; + void *code; + mapi_func entry; + + code = u_execmem_alloc(X86_ENTRY_SIZE); + if (!code) + return NULL; + + memcpy(code, code_templ, X86_ENTRY_SIZE); + entry = (mapi_func) code; + entry_patch(entry, slot); + + return entry; +} |