| /* Test for large alignment in TLS blocks (extern case), BZ#18383. |
| Copyright (C) 2015-2018 Free Software Foundation, Inc. |
| This file is part of the GNU C Library. |
| |
| The GNU C Library is free software; you can redistribute it and/or |
| modify it under the terms of the GNU Lesser General Public |
| License as published by the Free Software Foundation; either |
| version 2.1 of the License, or (at your option) any later version. |
| |
| The GNU C Library is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| Lesser General Public License for more details. |
| |
| You should have received a copy of the GNU Lesser General Public |
| License along with the GNU C Library; if not, see |
| <http://www.gnu.org/licenses/>. */ |
| |
| #include <stdint.h> |
| #include <stdio.h> |
| #include <stdlib.h> |
| |
| /* This is the same as tst-tlsalign-static.c, except that it uses |
| TLS variables that are defined in a separate translation unit |
| (ts-tlsalign-vars.c). It turned out that the cause of BZ#18383 |
| on ARM was actually an ARM assembler bug triggered by the ways of |
| using .tdata/.tbss sections and relocs referring to them that GCC |
| chooses when the variables are defined in the same translation |
| unit that contains the references. */ |
| |
| extern __thread int tdata1; |
| extern __thread int tdata2; |
| extern __thread int tdata3; |
| extern __thread int tbss1; |
| extern __thread int tbss2; |
| extern __thread int tbss3; |
| |
| static int |
| test_one (const char *which, unsigned int alignment, int *var, int value) |
| { |
| uintptr_t addr = (uintptr_t) var; |
| unsigned int misalign = addr & (alignment - 1); |
| |
| printf ("%s TLS address %p %% %u = %u\n", |
| which, (void *) var, alignment, misalign); |
| |
| int got = *var; |
| if (got != value) |
| { |
| printf ("%s value %d should be %d\n", which, got, value); |
| return 1; |
| } |
| |
| return misalign != 0; |
| } |
| |
| static int |
| do_test (void) |
| { |
| int fail = 0; |
| |
| fail |= test_one ("tdata1", 4, &tdata1, 1); |
| fail |= test_one ("tdata2", 0x10, &tdata2, 2); |
| fail |= test_one ("tdata3", 0x1000, &tdata3, 4); |
| |
| fail |= test_one ("tbss1", 4, &tbss1, 0); |
| fail |= test_one ("tbss2", 0x10, &tbss2, 0); |
| fail |= test_one ("tbss3", 0x1000, &tbss3, 0); |
| |
| return fail ? EXIT_FAILURE : EXIT_SUCCESS; |
| } |
| |
| #include <support/test-driver.c> |