/* System dependent definitions for run-time dynamic loading.

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Copyright (C) 1996-2018 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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