| 1 | /*
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| 2 | * Copyright (c) 2006 Ondrej Palkovsky
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| 3 | * Copyright (c) 2016 Jiri Svoboda
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| 4 | * All rights reserved.
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| 5 | *
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| 6 | * Redistribution and use in source and binary forms, with or without
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| 7 | * modification, are permitted provided that the following conditions
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| 8 | * are met:
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| 9 | *
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| 10 | * - Redistributions of source code must retain the above copyright
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| 11 | * notice, this list of conditions and the following disclaimer.
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| 12 | * - Redistributions in binary form must reproduce the above copyright
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| 13 | * notice, this list of conditions and the following disclaimer in the
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| 14 | * documentation and/or other materials provided with the distribution.
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| 15 | * - The name of the author may not be used to endorse or promote products
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| 16 | * derived from this software without specific prior written permission.
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| 17 | *
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| 18 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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| 19 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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| 20 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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| 21 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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| 22 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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| 23 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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| 24 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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| 25 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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| 26 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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| 27 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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| 28 | */
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| 29 |
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| 30 | /** @addtogroup libcamd64 amd64
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| 31 | * @ingroup lc
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| 32 | * @{
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| 33 | */
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| 34 | /** @file
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| 35 | * @ingroup libcia32
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| 36 | */
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| 37 |
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| 38 | #include <tls.h>
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| 39 | #include <sys/types.h>
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| 40 | #include <align.h>
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| 41 |
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| 42 | #ifdef CONFIG_RTLD
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| 43 | #include <rtld/rtld.h>
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| 44 | #endif
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| 45 |
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| 46 | tcb_t *tls_alloc_arch(void **data, size_t size)
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| 47 | {
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| 48 | return tls_alloc_variant_2(data, size);
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| 49 | }
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| 50 |
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| 51 | void tls_free_arch(tcb_t *tcb, size_t size)
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| 52 | {
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| 53 | tls_free_variant_2(tcb, size);
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| 54 | }
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| 55 |
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| 56 | /*
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| 57 | * Rtld TLS support
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| 58 | */
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| 59 |
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| 60 | typedef struct {
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| 61 | unsigned long int ti_module;
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| 62 | unsigned long int ti_offset;
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| 63 | } tls_index;
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| 64 |
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| 65 | void __attribute__ ((__regparm__ (1)))
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| 66 | *___tls_get_addr(tls_index *ti);
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| 67 |
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| 68 | void __attribute__ ((__regparm__ (1)))
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| 69 | *___tls_get_addr(tls_index *ti)
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| 70 | {
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| 71 | size_t tls_size;
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| 72 | uint8_t *tls;
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| 73 |
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| 74 | /* Calculate size of TLS block */
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| 75 | tls_size = tls_get_size();
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| 76 |
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| 77 | /* The TLS block is just before TCB */
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| 78 | tls = (uint8_t *)__tcb_get() - tls_size;
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| 79 |
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| 80 | #ifdef CONFIG_RTLD
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| 81 | if (runtime_env != NULL) {
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| 82 | return rtld_tls_get_addr(runtime_env, tls, ti->ti_module,
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| 83 | ti->ti_offset);
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| 84 | }
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| 85 | #endif
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| 86 | return tls + ti->ti_offset;
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| 87 | }
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| 88 |
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| 89 | /** @}
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| 90 | */
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