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 u_current_table, %eax\n\t" \ |
"testl %eax, %eax\n\t" \ |
"je 1f\n\t" \ |
"jmp *(4 * " slot ")(%eax)\n" \ |
"1:\n\t" \ |
"call u_current_get_internal\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) |
{ |
char *code = (char *) 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; |
} |