mirror of
https://gitlab.freedesktop.org/mesa/mesa.git
synced 2026-05-28 01:18:15 +02:00
c3f352e836
Only U_STRINGIFY() is used in entry.c Reviewed-by: Matt Turner <mattst88@gmail.com> Reviewed-by: José Fonseca <jfonseca@vmware.com>
102 lines
2.7 KiB
C
102 lines
2.7 KiB
C
/*
|
|
* 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>
|
|
*/
|
|
|
|
|
|
#define X86_ENTRY_SIZE 32
|
|
|
|
__asm__(".text\n"
|
|
".balign 32\n"
|
|
"x86_entry_start:");
|
|
|
|
#define STUB_ASM_ENTRY(func) \
|
|
".globl " func "\n" \
|
|
".type " func ", @function\n" \
|
|
".balign 32\n" \
|
|
func ":"
|
|
|
|
#define STUB_ASM_CODE(slot) \
|
|
"movl " ENTRY_CURRENT_TABLE ", %eax\n\t" \
|
|
"testl %eax, %eax\n\t" \
|
|
"je 1f\n\t" \
|
|
"jmp *(4 * " slot ")(%eax)\n" \
|
|
"1:\n\t" \
|
|
"call " ENTRY_CURRENT_TABLE_GET "\n\t" \
|
|
"jmp *(4 * " slot ")(%eax)"
|
|
|
|
#define MAPI_TMP_STUB_ASM_GCC
|
|
#include "mapi_tmp.h"
|
|
|
|
#ifndef MAPI_MODE_BRIDGE
|
|
|
|
__asm__(".balign 32\n"
|
|
"x86_entry_end:");
|
|
|
|
#include <string.h>
|
|
#include "u_execmem.h"
|
|
|
|
static const char x86_entry_start[];
|
|
static const char x86_entry_end[];
|
|
|
|
void
|
|
entry_patch_public(void)
|
|
{
|
|
}
|
|
|
|
mapi_func
|
|
entry_get_public(int slot)
|
|
{
|
|
return (mapi_func) (x86_entry_start + slot * X86_ENTRY_SIZE);
|
|
}
|
|
|
|
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)
|
|
{
|
|
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;
|
|
}
|
|
|
|
#endif /* MAPI_MODE_BRIDGE */
|