From: Szabolcs Nagy <szabolcs.nagy@arm.com>
To: <libc-alpha@sourceware.org>
Subject: [PATCH v4 3/4] linux: Add a getauxval test [BZ #23293]
Date: Wed, 4 May 2022 07:27:05 +0100 [thread overview]
Message-ID: <671e2f493e59ae35b68d5c72fc0f6865bf1d562b.1651643916.git.szabolcs.nagy@arm.com> (raw)
In-Reply-To: <cover.1651643916.git.szabolcs.nagy@arm.com>
This is for bug 23293 and it relies on the glibc test system running
tests via explicit ld.so invokation by default.
---
v4:
- New patch.
---
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-prctl \
tst-scm_rights \
tst-epoll \
+ tst-getauxval \
# tests
# For +depfiles in Makerules.
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>
--
2.25.1
next prev parent reply other threads:[~2022-05-04 6:27 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-05-04 6:26 [PATCH v4 0/4] Args adjustment with ./ld.so exe " Szabolcs Nagy
2022-05-04 6:26 ` [PATCH v4 1/4] rtld: Use generic argv adjustment in ld.so " Szabolcs Nagy
2022-05-04 9:28 ` Florian Weimer
2022-05-04 6:26 ` [PATCH v4 2/4] rtld: Remove DL_ARGV_NOT_RELRO Szabolcs Nagy
2022-05-04 9:31 ` Florian Weimer
2022-05-04 6:27 ` Szabolcs Nagy [this message]
2022-05-04 9:32 ` [PATCH v4 3/4] linux: Add a getauxval test [BZ #23293] Florian Weimer
2022-05-04 6:27 ` [PATCH v4 4/4] aarch64: Move ld.so _start to separate file and drop _dl_skip_args Szabolcs Nagy
2022-05-04 9:33 ` Florian Weimer
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=671e2f493e59ae35b68d5c72fc0f6865bf1d562b.1651643916.git.szabolcs.nagy@arm.com \
--to=szabolcs.nagy@arm.com \
--cc=libc-alpha@sourceware.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).