2 * Mesa 3-D graphics library
4 * Copyright (C) 2010 LunarG Inc.
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the "Software"),
8 * to deal in the Software without restriction, including without limitation
9 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
10 * and/or sell copies of the Software, and to permit persons to whom the
11 * Software is furnished to do so, subject to the following conditions:
13 * The above copyright notice and this permission notice shall be included
14 * in all copies or substantial portions of the Software.
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
21 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
22 * DEALINGS IN THE SOFTWARE.
25 * Chia-I Wu <olv@lunarg.com>
31 "x86_64_entry_start:");
33 #define STUB_ASM_ENTRY(func) \
35 ".type " func ", @function\n" \
39 #define STUB_ASM_CODE(slot) \
40 "movq " ENTRY_CURRENT_TABLE "@GOTTPOFF(%rip), %rax\n\t" \
41 "movq %fs:(%rax), %r11\n\t" \
42 "jmp *(8 * " slot ")(%r11)"
44 #define MAPI_TMP_STUB_ASM_GCC
47 #ifndef MAPI_MODE_BRIDGE
49 __asm__("x86_64_current_tls:\n\t"
50 "movq " ENTRY_CURRENT_TABLE
"@GOTTPOFF(%rip), %rax\n\t"
57 #include "u_execmem.h"
60 entry_patch_public(void)
68 entry_get_public(int slot
)
70 return (mapi_func
) (x86_64_entry_start
+ slot
* 32);
74 entry_patch(mapi_func entry
, int slot
)
76 char *code
= (char *) entry
;
77 *((unsigned int *) (code
+ 12)) = slot
* sizeof(mapi_func
);
81 entry_generate(int slot
)
83 const char code_templ
[16] = {
84 /* movq %fs:0, %r11 */
85 0x64, 0x4c, 0x8b, 0x1c, 0x25, 0x00, 0x00, 0x00, 0x00,
86 /* jmp *0x1234(%r11) */
87 0x41, 0xff, 0xa3, 0x34, 0x12, 0x00, 0x00,
93 addr
= x86_64_current_tls();
94 if ((addr
>> 32) != 0xffffffff)
98 code
= u_execmem_alloc(sizeof(code_templ
));
102 memcpy(code
, code_templ
, sizeof(code_templ
));
104 *((unsigned int *) (code
+ 5)) = addr
;
105 entry
= (mapi_func
) code
;
106 entry_patch(entry
, slot
);
111 #endif /* MAPI_MODE_BRIDGE */