63 lines
2.5 KiB
C
63 lines
2.5 KiB
C
/* dlfcn.h -- User functions for run-time dynamic loading.
|
|
Copyright (C) 1995, 1996 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., 675 Mass Ave,
|
|
Cambridge, MA 02139, USA. */
|
|
|
|
#ifndef _DLFCN_H
|
|
#define _DLFCN_H 1
|
|
|
|
|
|
/* 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
|
|
|
|
/* Open the shared object FILE and map it in; return a handle that can be
|
|
passed to `dlsym' to get symbol values from it. */
|
|
extern void *dlopen (const char *__file, int __mode);
|
|
|
|
/* Unmap and close a shared object opened by `dlopen'.
|
|
The handle cannot be used again after calling `dlclose'. */
|
|
extern int dlclose (void *__handle);
|
|
|
|
/* Find the run-time address in the shared object HANDLE refers to
|
|
of the symbol called NAME. */
|
|
extern void *dlsym (void *__handle, const char *__name);
|
|
|
|
/* When any of the above functions fails, call this function
|
|
to return a string describing the error. Each call resets
|
|
the error string so that a following call returns null. */
|
|
extern char *dlerror (void);
|
|
|
|
/* Fill in *INFO with the following information about ADDRESS.
|
|
Returns 0 iff no shared object's segments contain that address. */
|
|
typedef struct
|
|
{
|
|
const char *dli_fname; /* File name of defining object. */
|
|
void *dli_fbase; /* Load address of that object. */
|
|
const char *dli_sname; /* Name of nearest symbol. */
|
|
void *dli_saddr; /* Exact value of nearest symbol. */
|
|
} Dl_info;
|
|
extern int dladdr (void *__address, Dl_info *__info);
|
|
|
|
#endif /* dlfcn.h */
|