link_audit/common/symbindrep.c

	symbindrep.c revision 7c478bd95313f5f23a4c958a745db2134aa03244
/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License, Version 1.0 only
 * (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) 1997-2001 by Sun Microsystems, Inc.
 * All rights reserved.
 */

#pragma ident   "%Z%%M% %I% %E% SMI"


#include <stdio.h>
#include <stdlib.h>
#include <link.h>

#include "env.h"

static Elist    *bindto_list = 0;
static Elist    *bindfrom_list = 0;
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");

    (void) fprintf(output,
#ifdef _LP64
    "                            Symbol Bindings\n\n"
    "Referencing                  Defining\n"
    "Object                       Object                       Symbol\n"
    /* CSTYLED */
    "----------------------------------------------------------------------------------\n");
#else
    "                    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 == 0) ||
        (check_list(bindto_list, lmp->l_name)))
        flags = LA_FLG_BINDTO;
    else
        flags = 0;

    if ((bindfrom_list == 0) ||
        (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);
}