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 37 extern "C" int bump_static_tls_var_1() { 38 return ++tls_var_1; 39 } 40 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 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