56 lines
2.3 KiB
C
56 lines
2.3 KiB
C
/* System dependent definitions for run-time dynamic loading.
|
|
Copyright (C) 1996, 1997, 1998, 1999, 2000 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
|
|
The GNU C Library is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU Library General Public License as
|
|
published by the Free Software Foundation; either version 2 of the
|
|
License, or (at your option) any later version.
|
|
|
|
The GNU C Library is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
Library General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Library General Public
|
|
License along with the GNU C Library; see the file COPYING.LIB. If not,
|
|
write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
|
|
Boston, MA 02111-1307, USA. */
|
|
|
|
#ifndef _DLFCN_H
|
|
# error "Never use <bits/dlfcn.h> directly; include <dlfcn.h> instead."
|
|
#endif
|
|
|
|
/* The MODE argument to `dlopen' contains one of the following: */
|
|
#define RTLD_LAZY 0x001 /* Lazy function call binding. */
|
|
#define RTLD_NOW 0x002 /* Immediate function call binding. */
|
|
#define RTLD_BINDING_MASK 0x3 /* Mask of binding time value. */
|
|
|
|
/* If the following bit is set in the MODE argument to `dlopen',
|
|
the symbols of the loaded object and its dependencies are made
|
|
visible as if the object were linked directly into the program. */
|
|
#define RTLD_GLOBAL 0x100
|
|
|
|
/* Unix98 demands the following flag which is the inverse to RTLD_GLOBAL.
|
|
The implementation does this by default and so we can define the
|
|
value to zero. */
|
|
#define RTLD_LOCAL 0
|
|
|
|
#ifdef __USE_GNU
|
|
/* To support profiling of shared objects it is a good idea to call
|
|
the function found using `dlsym' using the following macro since
|
|
these calls do not use the PLT. But this would mean the dynamic
|
|
loader has no chance to find out when the function is called. The
|
|
macro applies the necessary magic so that profiling is possible.
|
|
Rewrite
|
|
foo = (*fctp) (arg1, arg2);
|
|
into
|
|
foo = DL_CALL_FCT (fctp, (arg1, arg2));
|
|
*/
|
|
# define DL_CALL_FCT(fctp, args) \
|
|
(_dl_mcount_wrapper_check (fctp), (*(fctp)) args)
|
|
|
|
/* This function calls the profiling functions. */
|
|
extern void _dl_mcount_wrapper_check (void *__selfpc) __THROW;
|
|
#endif
|