17c478bd9Sstevel@tonic-gate /*
27c478bd9Sstevel@tonic-gate  * CDDL HEADER START
37c478bd9Sstevel@tonic-gate  *
47c478bd9Sstevel@tonic-gate  * The contents of this file are subject to the terms of the
5*7257d1b4Sraf  * Common Development and Distribution License (the "License").
6*7257d1b4Sraf  * You may not use this file except in compliance with the License.
77c478bd9Sstevel@tonic-gate  *
87c478bd9Sstevel@tonic-gate  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
97c478bd9Sstevel@tonic-gate  * or http://www.opensolaris.org/os/licensing.
107c478bd9Sstevel@tonic-gate  * See the License for the specific language governing permissions
117c478bd9Sstevel@tonic-gate  * and limitations under the License.
127c478bd9Sstevel@tonic-gate  *
137c478bd9Sstevel@tonic-gate  * When distributing Covered Code, include this CDDL HEADER in each
147c478bd9Sstevel@tonic-gate  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
157c478bd9Sstevel@tonic-gate  * If applicable, add the following below this CDDL HEADER, with the
167c478bd9Sstevel@tonic-gate  * fields enclosed by brackets "[]" replaced with your own identifying
177c478bd9Sstevel@tonic-gate  * information: Portions Copyright [yyyy] [name of copyright owner]
187c478bd9Sstevel@tonic-gate  *
197c478bd9Sstevel@tonic-gate  * CDDL HEADER END
207c478bd9Sstevel@tonic-gate  */
217c478bd9Sstevel@tonic-gate 
227c478bd9Sstevel@tonic-gate /*
23*7257d1b4Sraf  * Copyright 2008 Sun Microsystems, Inc.  All rights reserved.
24*7257d1b4Sraf  * Use is subject to license terms.
257c478bd9Sstevel@tonic-gate  */
267c478bd9Sstevel@tonic-gate 
27*7257d1b4Sraf /*	Copyright (c) 1988 AT&T	*/
28*7257d1b4Sraf /*	  All Rights Reserved  	*/
297c478bd9Sstevel@tonic-gate 
307c478bd9Sstevel@tonic-gate #include "libelf.h"
317c478bd9Sstevel@tonic-gate #include "decl.h"
327c478bd9Sstevel@tonic-gate #include "msg.h"
337c478bd9Sstevel@tonic-gate 
347c478bd9Sstevel@tonic-gate 
357c478bd9Sstevel@tonic-gate Elf_Data *
elf_newdata(Elf_Scn * s)367c478bd9Sstevel@tonic-gate elf_newdata(Elf_Scn * s)
377c478bd9Sstevel@tonic-gate {
387c478bd9Sstevel@tonic-gate 	Dnode *		d;
397c478bd9Sstevel@tonic-gate 	Elf_Data *	rc;
407c478bd9Sstevel@tonic-gate 	Elf *		elf;
417c478bd9Sstevel@tonic-gate 	unsigned	work;
427c478bd9Sstevel@tonic-gate 
437c478bd9Sstevel@tonic-gate 	if (s == 0)
447c478bd9Sstevel@tonic-gate 		return (0);
457c478bd9Sstevel@tonic-gate 	elf = s->s_elf;
467c478bd9Sstevel@tonic-gate 	READLOCKS(elf, s)
477c478bd9Sstevel@tonic-gate 	if (s->s_index == SHN_UNDEF) {
487c478bd9Sstevel@tonic-gate 		_elf_seterr(EREQ_SCNNULL, 0);
497c478bd9Sstevel@tonic-gate 		READUNLOCKS(elf, s)
507c478bd9Sstevel@tonic-gate 		return (0);
517c478bd9Sstevel@tonic-gate 	}
527c478bd9Sstevel@tonic-gate 
537c478bd9Sstevel@tonic-gate 	if ((s->s_myflags & SF_READY) == 0) {
547c478bd9Sstevel@tonic-gate 		UPGRADELOCKS(elf, s)
557c478bd9Sstevel@tonic-gate 		/*
567c478bd9Sstevel@tonic-gate 		 * re-confirm that another 'thread' hasn't come along
577c478bd9Sstevel@tonic-gate 		 * and cooked this section while the locks were
587c478bd9Sstevel@tonic-gate 		 * obtained.
597c478bd9Sstevel@tonic-gate 		 */
607c478bd9Sstevel@tonic-gate 		if ((s->s_myflags & SF_READY) == 0)
617c478bd9Sstevel@tonic-gate 			(void) _elf_cookscn(s);
627c478bd9Sstevel@tonic-gate 		DOWNGRADELOCKS(elf, s)
637c478bd9Sstevel@tonic-gate 	}
647c478bd9Sstevel@tonic-gate 
657c478bd9Sstevel@tonic-gate 	/*
667c478bd9Sstevel@tonic-gate 	 * If this is the first new node, use the one allocated
677c478bd9Sstevel@tonic-gate 	 * in the scn itself.  Update data buffer in both cases.
687c478bd9Sstevel@tonic-gate 	 */
697c478bd9Sstevel@tonic-gate 	ELFACCESSDATA(work, _elf_work)
707c478bd9Sstevel@tonic-gate 	if (s->s_hdnode == 0) {
717c478bd9Sstevel@tonic-gate 		s->s_dnode.db_uflags |= ELF_F_DIRTY;
727c478bd9Sstevel@tonic-gate 		s->s_dnode.db_myflags |= DBF_READY;
737c478bd9Sstevel@tonic-gate 		s->s_hdnode = &s->s_dnode;
747c478bd9Sstevel@tonic-gate 		s->s_tlnode = &s->s_dnode;
757c478bd9Sstevel@tonic-gate 		s->s_dnode.db_scn = s;
767c478bd9Sstevel@tonic-gate 		s->s_dnode.db_data.d_version = work;
777c478bd9Sstevel@tonic-gate 		rc = &s->s_dnode.db_data;
787c478bd9Sstevel@tonic-gate 		READUNLOCKS(elf, s)
797c478bd9Sstevel@tonic-gate 		return (rc);
807c478bd9Sstevel@tonic-gate 	}
817c478bd9Sstevel@tonic-gate 	if ((d = _elf_dnode()) == 0) {
827c478bd9Sstevel@tonic-gate 		READUNLOCKS(elf, s)
837c478bd9Sstevel@tonic-gate 		return (0);
847c478bd9Sstevel@tonic-gate 	}
857c478bd9Sstevel@tonic-gate 	d->db_data.d_version = work;
867c478bd9Sstevel@tonic-gate 	d->db_scn = s;
877c478bd9Sstevel@tonic-gate 	d->db_uflags |= ELF_F_DIRTY;
887c478bd9Sstevel@tonic-gate 	d->db_myflags |= DBF_READY;
897c478bd9Sstevel@tonic-gate 	s->s_tlnode->db_next = d;
907c478bd9Sstevel@tonic-gate 	s->s_tlnode = d;
917c478bd9Sstevel@tonic-gate 	rc = &d->db_data;
927c478bd9Sstevel@tonic-gate 	READUNLOCKS(elf, s)
937c478bd9Sstevel@tonic-gate 	return (rc);
947c478bd9Sstevel@tonic-gate }
95