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>
28 #ifdef HAVE_FUNC_ATTRIBUTE_VISIBILITY
29 #define HIDDEN __attribute__((visibility("hidden")))
34 #define X86_ENTRY_SIZE 64
40 #define STUB_ASM_ENTRY(func) \
42 ".type " func ", @function\n" \
46 #define STUB_ASM_CODE(slot) \
51 "addl $_GLOBAL_OFFSET_TABLE_+[.-1b], %ebx\n\t" \
52 "movl " ENTRY_CURRENT_TABLE "@GOT(%ebx), %eax\n\t" \
53 "mov (%eax), %eax\n\t" \
54 "testl %eax, %eax\n\t" \
56 "call " ENTRY_CURRENT_TABLE_GET "@PLT\n\t" \
59 "jmp *(4 * " slot ")(%eax)"
61 #define MAPI_TMP_STUB_ASM_GCC
64 #ifndef MAPI_MODE_BRIDGE
66 __asm__(".balign 32\n"
70 #include "u_execmem.h"
72 extern const char x86_entry_start
[] HIDDEN
;
73 extern const char x86_entry_end
[] HIDDEN
;
76 entry_patch_public(void)
81 entry_get_public(int slot
)
83 return (mapi_func
) (x86_entry_start
+ slot
* X86_ENTRY_SIZE
);
87 entry_patch(mapi_func entry
, int slot
)
89 char *code
= (char *) entry
;
91 *((unsigned long *) (code
+ 11)) = slot
* sizeof(mapi_func
);
92 *((unsigned long *) (code
+ 22)) = slot
* sizeof(mapi_func
);
96 entry_generate(int slot
)
98 const char *code_templ
= x86_entry_end
- X86_ENTRY_SIZE
;
102 code
= u_execmem_alloc(X86_ENTRY_SIZE
);
106 memcpy(code
, code_templ
, X86_ENTRY_SIZE
);
107 entry
= (mapi_func
) code
;
108 entry_patch(entry
, slot
);
113 #endif /* MAPI_MODE_BRIDGE */