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
57257d1b4Sraf * Common Development and Distribution License (the "License").
67257d1b4Sraf * 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 */
217257d1b4Sraf
227c478bd9Sstevel@tonic-gate/*
237257d1b4Sraf * Copyright 2008 Sun Microsystems, Inc.  All rights reserved.
247c478bd9Sstevel@tonic-gate * Use is subject to license terms.
257c478bd9Sstevel@tonic-gate */
267c478bd9Sstevel@tonic-gate
27*9a70fc3bSMark J. Nelson	.file	"tls_get_addr.s"
287c478bd9Sstevel@tonic-gate
297c478bd9Sstevel@tonic-gate#include "SYS.h"
307257d1b4Sraf#include <../assym.h>
317c478bd9Sstevel@tonic-gate
327c478bd9Sstevel@tonic-gate/*
337c478bd9Sstevel@tonic-gate * To make thread-local storage accesses as fast as possible, we
347c478bd9Sstevel@tonic-gate * hand-craft the __tls_get_addr() function below, from this C code:
357c478bd9Sstevel@tonic-gate * void *
367c478bd9Sstevel@tonic-gate * __tls_get_addr(TLS_index *tls_index)
377c478bd9Sstevel@tonic-gate * {
387c478bd9Sstevel@tonic-gate *	ulwp_t *self = curthread;
397c478bd9Sstevel@tonic-gate *	tls_t *tlsent = self->ul_tlsent;
407c478bd9Sstevel@tonic-gate *	ulong_t moduleid;
417c478bd9Sstevel@tonic-gate *	caddr_t	base;
427c478bd9Sstevel@tonic-gate *
437c478bd9Sstevel@tonic-gate *	if ((moduleid = tls_index->ti_moduleid) < self->ul_ntlsent &&
447c478bd9Sstevel@tonic-gate *	    (base = tlsent[moduleid].tls_data) != NULL)
457c478bd9Sstevel@tonic-gate *		return (base + tls_index->ti_tlsoffset);
467c478bd9Sstevel@tonic-gate *
477c478bd9Sstevel@tonic-gate *	return (slow_tls_get_addr(tls_index));
487c478bd9Sstevel@tonic-gate * }
497c478bd9Sstevel@tonic-gate */
507c478bd9Sstevel@tonic-gate
517c478bd9Sstevel@tonic-gate/*
527c478bd9Sstevel@tonic-gate * We assume that the tls_t structure contains two pointer-sized elements.
537c478bd9Sstevel@tonic-gate * Cause a build failure if this becomes not true.
547c478bd9Sstevel@tonic-gate */
557c478bd9Sstevel@tonic-gate#if	SIZEOF_TLS_T == 8 && !defined(__sparcv9)
567c478bd9Sstevel@tonic-gate#define	SHIFT	3
577c478bd9Sstevel@tonic-gate#elif	SIZEOF_TLS_T == 16 && defined(__sparcv9)
587c478bd9Sstevel@tonic-gate#define	SHIFT	4
597c478bd9Sstevel@tonic-gate#else
607c478bd9Sstevel@tonic-gate#error	"Assumption violated: SIZEOF_TLS_T is not 2 * sizeof (uintptr_t)"
617c478bd9Sstevel@tonic-gate#endif
627c478bd9Sstevel@tonic-gate
637c478bd9Sstevel@tonic-gate#if	defined(__sparcv9)
647c478bd9Sstevel@tonic-gate#define	PN	,pn %xcc,
657c478bd9Sstevel@tonic-gate#else
667c478bd9Sstevel@tonic-gate#define	PN
677c478bd9Sstevel@tonic-gate#endif
687c478bd9Sstevel@tonic-gate
697c478bd9Sstevel@tonic-gate	ENTRY(__tls_get_addr)
707c478bd9Sstevel@tonic-gate	ldn	[%o0 + TI_MODULEID], %o1
717c478bd9Sstevel@tonic-gate	ldn	[%g7 + UL_TLSENT], %o2
727c478bd9Sstevel@tonic-gate	ldn	[%g7 + UL_NTLSENT], %o3
737c478bd9Sstevel@tonic-gate	cmp	%o1, %o3
747c478bd9Sstevel@tonic-gate	bgeu PN	1f
757c478bd9Sstevel@tonic-gate	slln	%o1, SHIFT, %o1
767c478bd9Sstevel@tonic-gate#if TLS_DATA != 0
777c478bd9Sstevel@tonic-gate	add	%o1, TLS_DATA, %o1
787c478bd9Sstevel@tonic-gate#endif
797c478bd9Sstevel@tonic-gate	ldn	[%o1 + %o2], %o2
807c478bd9Sstevel@tonic-gate	cmp	%o2, 0
817c478bd9Sstevel@tonic-gate	be PN	1f
827c478bd9Sstevel@tonic-gate	ldn	[%o0 + TI_TLSOFFSET], %o1
837c478bd9Sstevel@tonic-gate	retl
847c478bd9Sstevel@tonic-gate	add	%o1, %o2, %o0
857c478bd9Sstevel@tonic-gate1:
867c478bd9Sstevel@tonic-gate	mov	%o7, %g1
877c478bd9Sstevel@tonic-gate	call	slow_tls_get_addr
887c478bd9Sstevel@tonic-gate	mov	%g1, %o7
897c478bd9Sstevel@tonic-gate	SET_SIZE(__tls_get_addr)
90