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From 9faf5262c77487c96da8a3e961b88c0b1879e186 Mon Sep 17 00:00:00 2001
From: Szabolcs Nagy <szabolcs.nagy@arm.com>
Date: Tue, 3 May 2022 13:18:04 +0100
Subject: [PATCH 3/4] linux: Add a getauxval test [BZ #23293]
Conflict:adapt Makefile context
Reference:https://sourceware.org/git/?p=glibc.git;a=commitdiff;h=9faf5262c77487c96da8a3e961b88c0b1879e186
This is for bug 23293 and it relies on the glibc test system running
tests via explicit ld.so invokation by default.
Reviewed-by: Florian Weimer <fweimer@redhat.com>
Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
---
sysdeps/unix/sysv/linux/Makefile | 1 +
sysdeps/unix/sysv/linux/tst-getauxval.c | 74 +++++++++++++++++++++++++
2 files changed, 75 insertions(+)
create mode 100644 sysdeps/unix/sysv/linux/tst-getauxval.c
diff --git a/sysdeps/unix/sysv/linux/Makefile b/sysdeps/unix/sysv/linux/Makefile
index ca953804d0..89cb005c7d 100644
--- a/sysdeps/unix/sysv/linux/Makefile
+++ b/sysdeps/unix/sysv/linux/Makefile
@@ -126,6 +126,7 @@ tests += tst-clone tst-clone2 tst-clone3 tst-fanotify tst-personality \
tst-close_range \
tst-prctl \
tst-scm_rights \
+ tst-getauxval \
# tests
# Test for the symbol version of fcntl that was replaced in glibc 2.28.
diff --git a/sysdeps/unix/sysv/linux/tst-getauxval.c b/sysdeps/unix/sysv/linux/tst-getauxval.c
new file mode 100644
index 0000000000..c4b6195743
--- /dev/null
+++ b/sysdeps/unix/sysv/linux/tst-getauxval.c
@@ -0,0 +1,74 @@
+/* Basic test for getauxval.
+ Copyright (C) 2022 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 <unistd.h>
+#include <stdio.h>
+#include <support/check.h>
+#include <sys/auxv.h>
+
+static int missing;
+static int mismatch;
+
+static void
+check_nonzero (unsigned long t, const char *s)
+{
+ unsigned long v = getauxval (t);
+ printf ("%s: %lu (0x%lx)\n", s, v, v);
+ if (v == 0)
+ missing++;
+}
+
+static void
+check_eq (unsigned long t, const char *s, unsigned long want)
+{
+ unsigned long v = getauxval (t);
+ printf ("%s: %lu want: %lu\n", s, v, want);
+ if (v != want)
+ mismatch++;
+}
+
+#define NZ(x) check_nonzero (x, #x)
+#define EQ(x, want) check_eq (x, #x, want)
+
+static int
+do_test (void)
+{
+ /* These auxv entries should be non-zero on Linux. */
+ NZ (AT_PHDR);
+ NZ (AT_PHENT);
+ NZ (AT_PHNUM);
+ NZ (AT_PAGESZ);
+ NZ (AT_ENTRY);
+ NZ (AT_CLKTCK);
+ NZ (AT_RANDOM);
+ NZ (AT_EXECFN);
+ if (missing)
+ FAIL_EXIT1 ("Found %d missing auxv entries.\n", missing);
+
+ /* Check against syscalls. */
+ EQ (AT_UID, getuid ());
+ EQ (AT_EUID, geteuid ());
+ EQ (AT_GID, getgid ());
+ EQ (AT_EGID, getegid ());
+ if (mismatch)
+ FAIL_EXIT1 ("Found %d mismatching auxv entries.\n", mismatch);
+
+ return 0;
+}
+
+#include <support/test-driver.c>
--
2.27.0
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