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3f80a33b | 1 | /* System dependent definitions for run-time dynamic loading. |
dff8da6b | 2 | Copyright (C) 1996-2024 Free Software Foundation, Inc. |
f21acc89 UD |
3 | This file is part of the GNU C Library. |
4 | ||
5 | The GNU C Library is free software; you can redistribute it and/or | |
41bdb6e2 AJ |
6 | modify it under the terms of the GNU Lesser General Public |
7 | License as published by the Free Software Foundation; either | |
8 | version 2.1 of the License, or (at your option) any later version. | |
f21acc89 UD |
9 | |
10 | The GNU C Library is distributed in the hope that it will be useful, | |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
41bdb6e2 | 13 | Lesser General Public License for more details. |
f21acc89 | 14 | |
41bdb6e2 | 15 | You should have received a copy of the GNU Lesser General Public |
59ba27a6 | 16 | License along with the GNU C Library; if not, see |
5a82c748 | 17 | <https://www.gnu.org/licenses/>. */ |
f21acc89 | 18 | |
f4017d20 UD |
19 | #ifndef _DLFCN_H |
20 | # error "Never use <bits/dlfcn.h> directly; include <dlfcn.h> instead." | |
21 | #endif | |
f21acc89 UD |
22 | |
23 | /* The MODE argument to `dlopen' contains one of the following: */ | |
bf8b3e74 UD |
24 | #define RTLD_LAZY 0x00001 /* Lazy function call binding. */ |
25 | #define RTLD_NOW 0x00002 /* Immediate function call binding. */ | |
26 | #define RTLD_BINDING_MASK 0x3 /* Mask of binding time value. */ | |
27 | #define RTLD_NOLOAD 0x00004 /* Do not load the object. */ | |
1fc07491 | 28 | #define RTLD_DEEPBIND 0x00008 /* Use deep binding. */ |
f21acc89 UD |
29 | |
30 | /* If the following bit is set in the MODE argument to `dlopen', | |
31 | the symbols of the loaded object and its dependencies are made | |
32 | visible as if the object were linked directly into the program. */ | |
bf8b3e74 | 33 | #define RTLD_GLOBAL 0x00100 |
4bae5567 UD |
34 | |
35 | /* Unix98 demands the following flag which is the inverse to RTLD_GLOBAL. | |
36 | The implementation does this by default and so we can define the | |
37 | value to zero. */ | |
38 | #define RTLD_LOCAL 0 | |
a808d541 | 39 | |
bf8b3e74 UD |
40 | /* Do not delete object when closed. */ |
41 | #define RTLD_NODELETE 0x01000 | |
42 | ||
a808d541 UD |
43 | #ifdef __USE_GNU |
44 | /* To support profiling of shared objects it is a good idea to call | |
45 | the function found using `dlsym' using the following macro since | |
46 | these calls do not use the PLT. But this would mean the dynamic | |
47 | loader has no chance to find out when the function is called. The | |
48 | macro applies the necessary magic so that profiling is possible. | |
49 | Rewrite | |
50 | foo = (*fctp) (arg1, arg2); | |
51 | into | |
52 | foo = DL_CALL_FCT (fctp, (arg1, arg2)); | |
53 | */ | |
54 | # define DL_CALL_FCT(fctp, args) \ | |
ca6c7389 UD |
55 | (_dl_mcount_wrapper_check ((void *) (fctp)), (*(fctp)) args) |
56 | ||
57 | __BEGIN_DECLS | |
a808d541 UD |
58 | |
59 | /* This function calls the profiling functions. */ | |
60 | extern void _dl_mcount_wrapper_check (void *__selfpc) __THROW; | |
ca6c7389 UD |
61 | |
62 | __END_DECLS | |
63 | ||
a808d541 | 64 | #endif |