xref: /onnv-gate/usr/src/cmd/sgs/link_audit/common/symbindrep.c (revision 12927:a27c46eb192b)

/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License (the "License").
 * You may not use this file except in compliance with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */

/*
 * Copyright (c) 1996, 2010, Oracle and/or its affiliates. All rights reserved.
 */
#include <stdio.h>
#include <stdlib.h>
#include <link.h>

#include "env.h"

static Elist	*bindto_list = NULL;
static Elist	*bindfrom_list = NULL;
static FILE	*output = stdout;


uint_t
la_version(uint_t version)
{
	if (version < LAV_CURRENT) {
		(void) fprintf(stderr,
		    "symbindrep.so: unexpected version: %d\n", version);
		return (0);
	}

	build_env_list(&bindto_list, (const char *)"SYMBINDREP_BINDTO");
	build_env_list(&bindfrom_list, (const char *)"SYMBINDREP_BINDFROM");

#ifdef _LP64
	(void) fprintf(output,
	    "                            Symbol Bindings\n\n"
	    "Referencing                  Defining\n"
	    "Object                       Object                       Symbol\n"
	    "---------------------------------------------------------------"
	    "-------------------\n");
#else
	(void) fprintf(output,
	    "                    Symbol Bindings\n\n"
	    "Referencing          Defining\n"
	    "Object               Object               Symbol\n"
	    "---------------------------------------------------------------"
	    "---\n");
#endif
	return (LAV_CURRENT);
}

/* ARGSUSED1 */
uint_t
la_objopen(Link_map *lmp, Lmid_t lmid, uintptr_t *cookie)
{
	uint_t		flags;

	if ((bindto_list == NULL) ||
	    (check_list(bindto_list, lmp->l_name)))
		flags = LA_FLG_BINDTO;
	else
		flags = 0;

	if ((bindfrom_list == NULL) ||
	    (check_list(bindfrom_list, lmp->l_name)))
		flags |= LA_FLG_BINDFROM;

	*cookie = (uintptr_t)lmp->l_name;
	return (flags);
}


/* ARGSUSED1 */
#if	defined(_LP64)
uintptr_t
la_symbind64(Elf64_Sym *symp, uint_t symndx, uintptr_t *refcook,
	uintptr_t *defcook, uint_t *sb_flags, const char *sym_name)
#else
uintptr_t
la_symbind32(Elf32_Sym *symp, uint_t symndx, uintptr_t *refcook,
	uintptr_t *defcook, uint_t *sb_flags)
#endif
{
#if	!defined(_LP64)
	const char	*sym_name = (const char *)symp->st_name;
#endif

	(void) fprintf(output, "%-28s %-28s %s\n", (char *)(*refcook),
		(char *)(*defcook), sym_name);

	return (symp->st_value);
}

/*
 * Since we only want to report on the symbol bindings for this
 * process and we *do not* want the actual program to run we exit
 * at this point.
 */
/* ARGSUSED0 */
void
la_preinit(uintptr_t *cookie)
{
	(void) fflush(output);
	exit(0);
}