1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
|
/*
* 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 "u_macros.h"
#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 */
|
