diff options
Diffstat (limited to 'elf/tst-getauxval-static.c')
-rw-r--r-- | elf/tst-getauxval-static.c | 66 |
1 files changed, 66 insertions, 0 deletions
diff --git a/elf/tst-getauxval-static.c b/elf/tst-getauxval-static.c new file mode 100644 index 0000000000..8bc870709a --- /dev/null +++ b/elf/tst-getauxval-static.c @@ -0,0 +1,66 @@ +/* Test getauxval from a dynamic library after static dlopen. + Copyright (C) 2021 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 + <https://www.gnu.org/licenses/>. */ + +#include <dlfcn.h> +#include <errno.h> +#include <stdio.h> +#include <support/check.h> +#include <support/xdlfcn.h> +#include <sys/auxv.h> + +unsigned long getauxval_wrapper (unsigned long type, int *errnop); + +static int +do_test (void) +{ + unsigned long outer_random = getauxval (AT_RANDOM); + if (outer_random == 0) + FAIL_UNSUPPORTED ("getauxval does not support AT_RANDOM"); + + unsigned long missing_auxv_type; + for (missing_auxv_type = AT_RANDOM + 1; ; ++missing_auxv_type) + { + errno = 0; + if (getauxval (missing_auxv_type) == 0 && errno != 0) + { + TEST_COMPARE (errno, ENOENT); + break; + } + } + printf ("info: first missing type: %lu\n", missing_auxv_type); + + void *handle = xdlopen ("tst-auxvalmod.so", RTLD_LAZY); + void *ptr = xdlsym (handle, "getauxval_wrapper"); + + __typeof__ (getauxval_wrapper) *wrapper = ptr; + int inner_errno = 0; + unsigned long inner_random = wrapper (AT_RANDOM, &inner_errno); + TEST_COMPARE (outer_random, inner_random); + + inner_errno = 0; + TEST_COMPARE (wrapper (missing_auxv_type, &inner_errno), 0); + TEST_COMPARE (inner_errno, ENOENT); + + TEST_COMPARE (getauxval (AT_HWCAP), wrapper (AT_HWCAP, &inner_errno)); + TEST_COMPARE (getauxval (AT_HWCAP2), wrapper (AT_HWCAP2, &inner_errno)); + + xdlclose (handle); + return 0; +} + +#include <support/test-driver.c> |