1 /*
2 * Copyright (C) 2019 The Android Open Source Project
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * * Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * * Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in
12 * the documentation and/or other materials provided with the
13 * distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
16 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
17 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
18 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
19 * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
21 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
22 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
23 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
24 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
25 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 */
28
29 // This shared object tests TPREL relocations in the dynamic linker. It's always
30 // part of static TLS.
31
32 // For accesses to these variables, the bfd and lld linkers generate a TPREL
33 // relocation with no symbol but a non-zero addend.
34 __attribute__((tls_model("initial-exec"))) static __thread int tls_var_1 = 3;
35 __attribute__((tls_model("initial-exec"))) static __thread int tls_var_2 = 7;
36
bump_static_tls_var_1()37 extern "C" int bump_static_tls_var_1() {
38 return ++tls_var_1;
39 }
40
bump_static_tls_var_2()41 extern "C" int bump_static_tls_var_2() {
42 return ++tls_var_2;
43 }
44
45 __attribute__((tls_model("initial-exec"), weak)) extern "C" __thread int missing_weak_tls;
46
missing_weak_tls_addr()47 extern "C" int* missing_weak_tls_addr() {
48 // The dynamic linker should resolve a TPREL relocation to this symbol to 0,
49 // which this function adds to the thread pointer.
50 return &missing_weak_tls;
51 }
52