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commit b2585cae2854d7d2868fb2e51e2796042c5e0679
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Author: Szabolcs Nagy <szabolcs.nagy@arm.com>
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Date: Tue May 3 13:18:04 2022 +0100
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linux: Add a getauxval test [BZ #23293]
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This is for bug 23293 and it relies on the glibc test system running
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tests via explicit ld.so invokation by default.
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Reviewed-by: Florian Weimer <fweimer@redhat.com>
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Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
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(cherry picked from commit 9faf5262c77487c96da8a3e961b88c0b1879e186)
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diff --git a/sysdeps/unix/sysv/linux/Makefile b/sysdeps/unix/sysv/linux/Makefile
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index 0657f4003e7116c6..5c772f69d1b1f1f1 100644
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--- a/sysdeps/unix/sysv/linux/Makefile
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+++ b/sysdeps/unix/sysv/linux/Makefile
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@@ -123,6 +123,7 @@ tests += tst-clone tst-clone2 tst-clone3 tst-fanotify tst-personality \
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tst-close_range \
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tst-prctl \
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tst-scm_rights \
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+ tst-getauxval \
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# tests
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# Test for the symbol version of fcntl that was replaced in glibc 2.28.
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diff --git a/sysdeps/unix/sysv/linux/tst-getauxval.c b/sysdeps/unix/sysv/linux/tst-getauxval.c
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new file mode 100644
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index 0000000000000000..c4b619574369f4c5
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--- /dev/null
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+++ b/sysdeps/unix/sysv/linux/tst-getauxval.c
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@@ -0,0 +1,74 @@
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+/* Basic test for getauxval.
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+ Copyright (C) 2022 Free Software Foundation, Inc.
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+ This file is part of the GNU C Library.
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+
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+ The GNU C Library is free software; you can redistribute it and/or
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+ modify it under the terms of the GNU Lesser General Public
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+ License as published by the Free Software Foundation; either
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+ version 2.1 of the License, or (at your option) any later version.
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+
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+ The GNU C Library is distributed in the hope that it will be useful,
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+ but WITHOUT ANY WARRANTY; without even the implied warranty of
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+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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+ Lesser General Public License for more details.
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+
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+ You should have received a copy of the GNU Lesser General Public
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+ License along with the GNU C Library; if not, see
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+ <https://www.gnu.org/licenses/>. */
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+
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+#include <unistd.h>
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+#include <stdio.h>
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+#include <support/check.h>
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+#include <sys/auxv.h>
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+
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+static int missing;
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+static int mismatch;
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+
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+static void
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+check_nonzero (unsigned long t, const char *s)
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+{
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+ unsigned long v = getauxval (t);
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+ printf ("%s: %lu (0x%lx)\n", s, v, v);
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+ if (v == 0)
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+ missing++;
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+}
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+
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+static void
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+check_eq (unsigned long t, const char *s, unsigned long want)
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+{
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+ unsigned long v = getauxval (t);
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+ printf ("%s: %lu want: %lu\n", s, v, want);
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+ if (v != want)
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+ mismatch++;
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+}
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+
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+#define NZ(x) check_nonzero (x, #x)
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+#define EQ(x, want) check_eq (x, #x, want)
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+
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+static int
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+do_test (void)
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+{
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+ /* These auxv entries should be non-zero on Linux. */
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+ NZ (AT_PHDR);
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+ NZ (AT_PHENT);
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+ NZ (AT_PHNUM);
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+ NZ (AT_PAGESZ);
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+ NZ (AT_ENTRY);
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+ NZ (AT_CLKTCK);
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+ NZ (AT_RANDOM);
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+ NZ (AT_EXECFN);
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+ if (missing)
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+ FAIL_EXIT1 ("Found %d missing auxv entries.\n", missing);
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+
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+ /* Check against syscalls. */
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+ EQ (AT_UID, getuid ());
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+ EQ (AT_EUID, geteuid ());
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+ EQ (AT_GID, getgid ());
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+ EQ (AT_EGID, getegid ());
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+ if (mismatch)
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+ FAIL_EXIT1 ("Found %d mismatching auxv entries.\n", mismatch);
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+
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+ return 0;
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+}
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+
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+#include <support/test-driver.c>
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