85 lines
3.1 KiB
C
85 lines
3.1 KiB
C
|
/* User functions for run-time dynamic loading.
|
||
|
|
Copyright (C) 1995-1999, 2000, 2001 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 Lesser General Public
|
||
|
|
License as published by the Free Software Foundation; either
|
||
|
|
version 2.1 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
|
||
|
|
Lesser General Public License for more details.
|
||
|
|
|
||
|
|
You should have received a copy of the GNU Lesser General Public
|
||
|
|
License along with the GNU C Library; if not, write to the Free
|
||
|
|
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
|
||
|
|
02111-1307 USA. */
|
||
|
|
|
||
|
|
#ifndef _DLFCN_H
|
||
|
|
#define _DLFCN_H 1
|
||
|
|
|
||
|
|
#include <features.h>
|
||
|
|
|
||
|
|
/* Collect various system dependent definitions and declarations. */
|
||
|
|
#include <sys/dlfcn.h>
|
||
|
|
|
||
|
|
|
||
|
|
/* If the first argument of `dlsym' or `dlvsym' is set to RTLD_NEXT
|
||
|
|
the run-time address of the symbol called NAME in the next shared
|
||
|
|
object is returned. The "next" relation is defined by the order
|
||
|
|
the shared objects were loaded. */
|
||
|
|
# define RTLD_NEXT ((void *) -1l)
|
||
|
|
|
||
|
|
/* If the first argument to `dlsym' or `dlvsym' is set to RTLD_DEFAULT
|
||
|
|
the run-time address of the symbol called NAME in the global scope
|
||
|
|
is returned. */
|
||
|
|
# define RTLD_DEFAULT ((void *) 0)
|
||
|
|
|
||
|
|
|
||
|
|
__BEGIN_DECLS
|
||
|
|
|
||
|
|
/* 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) __THROW;
|
||
|
|
|
||
|
|
/* Unmap and close a shared object opened by `dlopen'.
|
||
|
|
The handle cannot be used again after calling `dlclose'. */
|
||
|
|
extern int dlclose (void *__handle) __THROW;
|
||
|
|
|
||
|
|
/* Find the run-time address in the shared object HANDLE refers to
|
||
|
|
of the symbol called NAME. */
|
||
|
|
extern void *dlsym (void *__restrict __handle,
|
||
|
|
__const char *__restrict __name) __THROW;
|
||
|
|
|
||
|
|
/* Find the run-time address in the shared object HANDLE refers to
|
||
|
|
of the symbol called NAME with VERSION. */
|
||
|
|
extern void *dlvsym (void *__restrict __handle,
|
||
|
|
__const char *__restrict __name,
|
||
|
|
__const char *__restrict __version) __THROW;
|
||
|
|
|
||
|
|
/* 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) __THROW;
|
||
|
|
|
||
|
|
|
||
|
|
/* Structure containing information about object searched using
|
||
|
|
`dladdr'. */
|
||
|
|
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;
|
||
|
|
|
||
|
|
/* Fill in *INFO with the following information about ADDRESS.
|
||
|
|
Returns 0 iff no shared object's segments contain that address. */
|
||
|
|
extern int dladdr (__const void *__address, Dl_info *__info) __THROW;
|
||
|
|
|
||
|
|
__END_DECLS
|
||
|
|
|
||
|
|
#endif /* dlfcn.h */
|