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1d325002 | 1 | /* System dependent definitions for run-time dynamic loading. |
f7a9f785 | 2 | Copyright (C) 1996-2016 Free Software Foundation, Inc. |
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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 | |
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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. | |
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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 | |
3214b89b | 13 | Lesser General Public License for more details. |
8c0c6f59 | 14 | |
3214b89b | 15 | You should have received a copy of the GNU Lesser General Public |
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16 | License along with the GNU C Library. If not, see |
17 | <http://www.gnu.org/licenses/>. */ | |
8c0c6f59 | 18 | |
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19 | #ifndef _DLFCN_H |
20 | # error "Never use <bits/dlfcn.h> directly; include <dlfcn.h> instead." | |
21 | #endif | |
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22 | |
23 | /* The MODE argument to `dlopen' contains one of the following: */ | |
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24 | #define RTLD_LAZY 0x0001 /* Lazy function call binding. */ |
25 | #define RTLD_NOW 0x0002 /* Immediate function call binding. */ | |
2863de95 | 26 | #define RTLD_BINDING_MASK 0x3 /* Mask of binding time value. */ |
f8bc20d3 | 27 | #define RTLD_NOLOAD 0x00008 /* Do not load the object. */ |
2863de95 | 28 | #define RTLD_DEEPBIND 0x00010 /* Use deep binding. */ |
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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. */ | |
f8bc20d3 | 33 | #define RTLD_GLOBAL 0x0004 |
8c0c6f59 | 34 | |
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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 | |
e6e840f0 | 39 | |
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40 | /* Do not delete object when closed. */ |
41 | #define RTLD_NODELETE 0x01000 | |
42 | ||
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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) \ | |
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55 | (_dl_mcount_wrapper_check ((void *) (fctp)), (*(fctp)) args) |
56 | ||
57 | __BEGIN_DECLS | |
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58 | |
59 | /* This function calls the profiling functions. */ | |
60 | extern void _dl_mcount_wrapper_check (void *__selfpc) __THROW; | |
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61 | |
62 | __END_DECLS | |
63 | ||
e6e840f0 | 64 | #endif |