fixup.c

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

/*
 *	@(#)fixup.c (solib) 
 *
 *	Shared object(SO)support library
 *	Search/link of symbol
 */

#include "../../so.h"

/*
 * Run time symbol link
 */
EXPORT UW __so_fixup( DLInfo *dlp, UW relofs)
{
	Elf32_Rela	*rela;
	Elf32_Sym	*sym;
	UB		*name;
	UW		val;
	UW		*uwp;

	rela = (VP)((UW)dlp->jreltab + relofs);
	sym = &dlp->symtab[ELF32_R_SYM(rela->r_info)];

	/* Symbol search(link) */
	name = dlp->strtab + sym->st_name;
	val = __so_resolve(dlp, name, R_SH_JMP_SLOT, &sym);

	if ( sym == NULL ) {
		SYSLOG((LOG_ERR, "solib: %s is not defined", name));
	}

	/* Store the symbol value */
	uwp = (UW*)((UB *)(rela->r_offset) + dlp->ldofs);
	*uwp = val;

	return val;
}