libdl.h

T-kernel 的extension源代码

/*
 *----------------------------------------------------------------------
 *    T-Kernel / Standard Extension
 *
 *    Copyright (C) 2006 by Ken Sakamura. All rights reserved.
 *    T-Kernel / Standard Extension is distributed 
 *      under the T-License for T-Kernel / Standard Extension.
 *----------------------------------------------------------------------
 *
 *    Version:   1.00.00
 *    Released by T-Engine Forum(http://www.t-engine.org) at 2006/8/11.
 *
 *----------------------------------------------------------------------
 */

/*
 *	@(#)libdl.h (libdl)
 *
 *	DLL support library
 */

#include <basic.h>
#include <extension/proctask.h>
#include <extension/tkcall.h>
#include <sys/pinfo.h>
#include <sys/solib.h>
#include <sys/libs.h>
#include <sys/syslog.h>
#include <sys/knldbg.h>
#include <extension/errno.h>
#include <sys/debug.h>

#define	WEAK	__attribute__ ((weak))

/*
 * Log output
 */
#define	LOG	KnlLogMsg

/*
 * Lock
 *	Use the library shared lock
 */
#define	LockDL()	_lib_lock(_LL_DLL, FALSE)
#define	UnlockDL()	_lib_unlock(_LL_DLL)

/*
 * Local use memory allocation function
 *  Define it to prevent the use of malloc() etc by mistake. 
 *
 */
#define	malloc	__so_malloc
#define	calloc	__so_calloc
#define	realloc	__so_realloc
#define	free	__so_free

/*
 * solib entry
 *	solib entity is linked to the main program.
 *	It is linked to the entity at runtime by linking libdl as a shared library.
 */
IMPORT DLInfo __dlInfo WEAK;
IMPORT void* __so_malloc( size_t size ) WEAK;
IMPORT void __so_free( void *ptr ) WEAK;
IMPORT ER __so_loading( DLInfo **dlpp, SOBJ_HDR *sohdr, DLInfo *loader ) WEAK;
IMPORT ER __so_depsloading( DLInfo *loader, UW global ) WEAK;
IMPORT ER __so_relocate( DLInfo *loader, UW lazy ) WEAK;
IMPORT void __so_callinit( DLInfo *loader ) WEAK;
IMPORT void __so_callfini( DLInfo *loader ) WEAK;
IMPORT UW __so_resolve( DLInfo *dlp, UB *name, UW reltype, Elf32_Sym **sym ) WEAK;
IMPORT UW __so_localresolve( DLInfo *dlp, UB *name, DLInfo *skip, Elf32_Sym **sym ) WEAK;
IMPORT void __freeDLInfo( DLInfo *dlp ) WEAK;

/* ------------------------------------------------------------------------ */
/*
 *	Global variable/function
 *
 */
#define	IMPORT_DEFINE	1

#if IMPORT_DEFINE
/* addrinfo.c */
IMPORT WER tkse_dladdr( VP addr, T_DLINFO *info );
/* search.c */
IMPORT ER tkse_dlsearch( TC *path, LINK *lnk, W mode );
/* load.c */
IMPORT DLInfo* __getdlinfo( W handle );
IMPORT WER tkse_dlopen( T_DLOPEN *info );
IMPORT ER tkse_dlclose( W handle );
/* symbol.c */
IMPORT DLInfo* __addrdlinfo( VP addr );
IMPORT ER tkse_dlsym( W handle, const char *symbol, UW *val );

IMPORT void *dlopen(const char *filename, int flag);
IMPORT int dlclose( void *handle );
IMPORT void *dlsym(void *handle, const char *symbol);
IMPORT int dladdr( void *addr, Dl_info *info );

#endif