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      1 /*
      2  * CDDL HEADER START
      3  *
      4  * The contents of this file are subject to the terms of the
      5  * Common Development and Distribution License (the "License").
      6  * You may not use this file except in compliance with the License.
      7  *
      8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
      9  * or http://www.opensolaris.org/os/licensing.
     10  * See the License for the specific language governing permissions
     11  * and limitations under the License.
     12  *
     13  * When distributing Covered Code, include this CDDL HEADER in each
     14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
     15  * If applicable, add the following below this CDDL HEADER, with the
     16  * fields enclosed by brackets "[]" replaced with your own identifying
     17  * information: Portions Copyright [yyyy] [name of copyright owner]
     18  *
     19  * CDDL HEADER END
     20  */
     21 
     22 /*
     23  * Copyright 2008 Sun Microsystems, Inc.  All rights reserved.
     24  * Use is subject to license terms.
     25  */
     26 
     27 #pragma ident	"%Z%%M%	%I%	%E% SMI"
     28 
     29 #include <sys/auxv.h>
     30 #include <sys/types.h>
     31 
     32 void
     33 sbcp_init(int argc, char *argv[], char *envp[])
     34 {
     35 	auxv_t			*ap;
     36 	uintptr_t		*p;
     37 	int			err;
     38 
     39 	/*
     40 	 * Find the aux vector on the stack.
     41 	 */
     42 	p = (uintptr_t *)envp;
     43 	while (*p != NULL)
     44 		p++;
     45 
     46 	/*
     47 	 * p is now pointing at the 0 word after the environ pointers.
     48 	 * After that is the aux vectors.
     49 	 *
     50 	 * We need to clear the AF_SUN_NOPLM flag from the AT_SUN_AUXFLAGS
     51 	 * aux vector.  This flag told our linker that we don't have a
     52 	 * primary link map.  Now that our linker is done initializing, we
     53 	 * want to clear this flag before we transfer control to the
     54 	 * applications copy of the linker, since we want that linker to have
     55 	 * a primary link map which will be the link map for the application
     56 	 * we're running.
     57 	 */
     58 	p++;
     59 	for (ap = (auxv_t *)p; ap->a_type != AT_NULL; ap++) {
     60 		switch (ap->a_type) {
     61 			case AT_SUN_AUXFLAGS:
     62 				ap->a_un.a_val &= ~AF_SUN_NOPLM;
     63 				break;
     64 			default:
     65 				break;
     66 		}
     67 	}
     68 }
     69