/*
* 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 2008 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
.file "tls_get_addr.s"
#include "SYS.h"
#include <../assym.h>
/*
* To make thread-local storage accesses as fast as possible, we
* hand-craft the __tls_get_addr() function below, from this C code:
* void *
* __tls_get_addr(TLS_index *tls_index)
* {
* ulwp_t *self = curthread;
* tls_t *tlsent = self->ul_tlsent;
* ulong_t moduleid;
* caddr_t base;
*
* if ((moduleid = tls_index->ti_moduleid) < self->ul_ntlsent &&
* (base = tlsent[moduleid].tls_data) != NULL)
* return (base + tls_index->ti_tlsoffset);
*
* return (slow_tls_get_addr(tls_index));
* }
*/
/*
* We assume that the tls_t structure contains two pointer-sized elements.
* Cause a build failure if this becomes not true.
*/
#if SIZEOF_TLS_T == 8 && !defined(__sparcv9)
#define SHIFT 3
#elif SIZEOF_TLS_T == 16 && defined(__sparcv9)
#define SHIFT 4
#else
#error "Assumption violated: SIZEOF_TLS_T is not 2 * sizeof (uintptr_t)"
#endif
#if defined(__sparcv9)
#define PN ,pn %xcc,
#else
#define PN
#endif
ENTRY(__tls_get_addr)
ldn [%o0 + TI_MODULEID], %o1
ldn [%g7 + UL_TLSENT], %o2
ldn [%g7 + UL_NTLSENT], %o3
cmp %o1, %o3
bgeu PN 1f
slln %o1, SHIFT, %o1
#if TLS_DATA != 0
add %o1, TLS_DATA, %o1
#endif
ldn [%o1 + %o2], %o2
cmp %o2, 0
be PN 1f
ldn [%o0 + TI_TLSOFFSET], %o1
retl
add %o1, %o2, %o0
1:
mov %o7, %g1
call slow_tls_get_addr
mov %g1, %o7
SET_SIZE(__tls_get_addr)