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65 lines
2.5 KiB
C
65 lines
2.5 KiB
C
/* System dependent definitions for run-time dynamic loading.
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Copyright (C) 1996-2016 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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#ifndef _DLFCN_H
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# error "Never use <bits/dlfcn.h> directly; include <dlfcn.h> instead."
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#endif
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/* The MODE argument to `dlopen' contains one of the following: */
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#define RTLD_LAZY 0x00001 /* Lazy function call binding. */
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#define RTLD_NOW 0x00002 /* Immediate function call binding. */
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#define RTLD_BINDING_MASK 0x3 /* Mask of binding time value. */
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#define RTLD_NOLOAD 0x00004 /* Do not load the object. */
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#define RTLD_DEEPBIND 0x00008 /* Use deep binding. */
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/* If the following bit is set in the MODE argument to `dlopen',
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the symbols of the loaded object and its dependencies are made
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visible as if the object were linked directly into the program. */
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#define RTLD_GLOBAL 0x00100
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/* Unix98 demands the following flag which is the inverse to RTLD_GLOBAL.
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The implementation does this by default and so we can define the
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value to zero. */
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#define RTLD_LOCAL 0
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/* Do not delete object when closed. */
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#define RTLD_NODELETE 0x01000
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#ifdef __USE_GNU
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/* To support profiling of shared objects it is a good idea to call
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the function found using `dlsym' using the following macro since
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these calls do not use the PLT. But this would mean the dynamic
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loader has no chance to find out when the function is called. The
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macro applies the necessary magic so that profiling is possible.
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Rewrite
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foo = (*fctp) (arg1, arg2);
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into
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foo = DL_CALL_FCT (fctp, (arg1, arg2));
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*/
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# define DL_CALL_FCT(fctp, args) \
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(_dl_mcount_wrapper_check ((void *) (fctp)), (*(fctp)) args)
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__BEGIN_DECLS
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/* This function calls the profiling functions. */
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extern void _dl_mcount_wrapper_check (void *__selfpc) __THROW;
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__END_DECLS
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#endif
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