dynload.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.
 *
 *----------------------------------------------------------------------
 */

/*
 *	@(#)dynload.h  
 *
 *	Dynamic loading
 */

#ifndef __EXTENSION_DYNLOAD_H__
#define __EXTENSION_DYNLOAD_H__

#include <basic.h>
#include "typedef.h"
#include <sys/pinfo.h>


#ifdef __cplusplus
extern "C" {
#endif

/*
 * tkse_dlsearch mode
 */
#define	DL_BASE		0x08	/* File specified at "Ink"  */
#define	DL_WORK		0x04	/* Current working file */
#define	DL_PROC		0x02	/* The invoking process program file */
#define	DL_STDLIB	0x01	/* Standard library file /SYS/lib */

/*
 * tkse_dlopen flag
 */
#define	DL_LAZY		0x0001			/* Resolve the undefined symbol sequentially at runtime */
#define	DL_NOW		0x0002			/* Resolve the undefined symbol at the time of loading */
#define	DL_GLOBAL	0x0100			/* the symbol shall be handled as a global scope */
#define	DL_BINDING_MASK	(DL_LAZY | DL_NOW)	/* Mask that specifies linking  */

#define	RTLD_LAZY		DL_LAZY		/* Resolve the undefined symbol sequentially at runtime */
#define	RTLD_NOW		DL_NOW		/* Resolve the undefined symbol at the time of loading */
#define	RTLD_GLOBAL		DL_GLOBAL	/* the symbol shall be handled as a global scope */
#define	RTLD_BINDING_MASK	DL_BINDING_MASK	/* Mask that specifies linking  */

/*
 * tkse_dlsym special handl
 */
#define	DL_NEXT		(-1)			/* Search the symbol of the lower rank than itself */
#define	DL_DEFAULT	0			/* Search global symbol */

#define	RTLD_NEXT	((void *)DL_NEXT)	/* Search the symbol of the lower rank than itself */
#define	RTLD_DEFAULT	((void *)DL_DEFAULT)	/* Search global symbol */

typedef struct {
	ATR		atr;		/* object attribute */
	VP 		path;		/* filename  */
	W		mode;		/* open mode */
} T_DLOPEN;

typedef struct {
	ATR		atr;		/* object attribute */
	VP	 	path;		/* filename */
	VP	 	fbase;		/* base address */
	const B 	*sname;		/* symbol name */
	VP		saddr;		/* symbol address */
} T_DLINFO;

typedef struct {
	const char 	*dli_fname;	/* filename */
	void		*dli_fbase;	/* base address */
	const char 	*dli_sname;	/* symbol name */
	void		*dli_saddr;	/* symbol address */
} Dl_info;

/*
 * Library function
 */
IMPORT ER tkse_dlsearch( TC *path, LINK *lnk, W mode );
IMPORT WER tkse_dlopen( T_DLOPEN *info );
IMPORT ER tkse_dlsym( W handle, const char *symbol, UW *val );
IMPORT ER tkse_dladdr( VP addr, T_DLINFO *info );
IMPORT ER tkse_dlclose( W handle );

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

#ifdef __cplusplus
}
#endif
#endif /* __EXTENSION_DYNLOAD_H__ */