2 * Mesa 3-D graphics library
5 * Copyright (C) 2010 LunarG Inc.
7 * Permission is hereby granted, free of charge, to any person obtaining a
8 * copy of this software and associated documentation files (the "Software"),
9 * to deal in the Software without restriction, including without limitation
10 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
11 * and/or sell copies of the Software, and to permit persons to whom the
12 * Software is furnished to do so, subject to the following conditions:
14 * The above copyright notice and this permission notice shall be included
15 * in all copies or substantial portions of the Software.
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
18 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
20 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
21 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
22 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
23 * DEALINGS IN THE SOFTWARE.
26 * Chia-I Wu <olv@lunarg.com>
32 __asm__(".section .note.ABI-tag, \"a\"\n\t"
34 ".long 1f - 0f\n\t" /* name length */
35 ".long 3f - 2f\n\t" /* data length */
36 ".long 1\n\t" /* note length */
37 "0: .asciz \"GNU\"\n\t" /* vendor name */
39 "2: .long 0\n\t" /* note data: the ABI tag */
40 ".long 2,4,20\n\t" /* Minimum kernel version w/TLS */
41 "3: .p2align 2\n\t"); /* pad out section */
42 #endif /* __linux__ */
46 "x86_64_entry_start:");
48 #define STUB_ASM_ENTRY(func) \
50 ".type " func ", @function\n" \
54 #define STUB_ASM_CODE(slot) \
55 "movq " ENTRY_CURRENT_TABLE "@GOTTPOFF(%rip), %rax\n\t" \
56 "movq %fs:(%rax), %r11\n\t" \
57 "jmp *(8 * " slot ")(%r11)"
59 #define MAPI_TMP_STUB_ASM_GCC
62 #ifndef MAPI_MODE_BRIDGE
64 __asm__("x86_64_current_tls:\n\t"
65 "movq " ENTRY_CURRENT_TABLE
"@GOTTPOFF(%rip), %rax\n\t"
72 #include "u_execmem.h"
75 entry_patch_public(void)
83 entry_get_public(int slot
)
85 return (mapi_func
) (x86_64_entry_start
+ slot
* 32);
89 entry_patch(mapi_func entry
, int slot
)
91 char *code
= (char *) entry
;
92 *((unsigned int *) (code
+ 12)) = slot
* sizeof(mapi_func
);
96 entry_generate(int slot
)
98 const char code_templ
[16] = {
99 /* movq %fs:0, %r11 */
100 0x64, 0x4c, 0x8b, 0x1c, 0x25, 0x00, 0x00, 0x00, 0x00,
101 /* jmp *0x1234(%r11) */
102 0x41, 0xff, 0xa3, 0x34, 0x12, 0x00, 0x00,
108 addr
= x86_64_current_tls();
109 if ((addr
>> 32) != 0xffffffff)
113 code
= u_execmem_alloc(sizeof(code_templ
));
117 memcpy(code
, code_templ
, sizeof(code_templ
));
119 *((unsigned int *) (code
+ 5)) = addr
;
120 entry
= (mapi_func
) code
;
121 entry_patch(entry
, slot
);
126 #endif /* MAPI_MODE_BRIDGE */