glibc/v2-0006-x86-cet-Add-tests-for-GLIBC_TUNABLES-glibc.cpu.hw.patch
Siddhesh Poyarekar 144f612406 Shadow stack userspace support
Downstream only and disabled by default.
2023-06-08 13:31:34 -04:00

82 lines
3.2 KiB
Diff

From 7a97a9ab63a37ae1191e514258e4f6fefdc2e41b Mon Sep 17 00:00:00 2001
From: "H.J. Lu" <hjl.tools@gmail.com>
Date: Fri, 17 Mar 2023 16:21:49 -0700
Subject: [PATCH v2 06/15] x86/cet: Add tests for
GLIBC_TUNABLES=glibc.cpu.hwcaps=-SHSTK
Verify that GLIBC_TUNABLES=glibc.cpu.hwcaps=-SHSTK turns off shadow
stack properly.
---
sysdeps/x86/Makefile | 7 +++++++
sysdeps/x86/tst-shstk-legacy-1c-static.c | 1 +
sysdeps/x86/tst-shstk-legacy-1c.c | 20 ++++++++++++++++++++
3 files changed, 28 insertions(+)
create mode 100644 sysdeps/x86/tst-shstk-legacy-1c-static.c
create mode 100644 sysdeps/x86/tst-shstk-legacy-1c.c
diff --git a/sysdeps/x86/Makefile b/sysdeps/x86/Makefile
index 580c3ecdc5..5f1414fba3 100644
--- a/sysdeps/x86/Makefile
+++ b/sysdeps/x86/Makefile
@@ -137,10 +137,13 @@ tests += \
tst-shstk-legacy-1a-static \
tst-shstk-legacy-1b \
tst-shstk-legacy-1b-static \
+ tst-shstk-legacy-1c \
+ tst-shstk-legacy-1c-static \
# tests
tests-static += \
tst-shstk-legacy-1a-static \
tst-shstk-legacy-1b-static \
+ tst-shstk-legacy-1c-static \
# tests-static
extra-objs += \
tst-shstk-legacy-1-extra.o \
@@ -227,6 +230,10 @@ $(objpfx)tst-shstk-legacy-1a: $(objpfx)tst-shstk-legacy-1-extra.o
$(objpfx)tst-shstk-legacy-1a-static: $(objpfx)tst-shstk-legacy-1-extra.o
$(objpfx)tst-shstk-legacy-1b: $(objpfx)tst-shstk-legacy-1-extra.o
$(objpfx)tst-shstk-legacy-1b-static: $(objpfx)tst-shstk-legacy-1-extra.o
+tst-shstk-legacy-1c-ENV = GLIBC_TUNABLES=glibc.cpu.hwcaps=-SHSTK
+tst-shstk-legacy-1c-static-ENV = GLIBC_TUNABLES=glibc.cpu.hwcaps=-SHSTK
+$(objpfx)tst-shstk-legacy-1c: $(objpfx)tst-shstk-legacy-1-extra.o
+$(objpfx)tst-shstk-legacy-1c-static: $(objpfx)tst-shstk-legacy-1-extra.o
endif
# Add -fcf-protection to CFLAGS when CET is enabled.
diff --git a/sysdeps/x86/tst-shstk-legacy-1c-static.c b/sysdeps/x86/tst-shstk-legacy-1c-static.c
new file mode 100644
index 0000000000..91ea346aaf
--- /dev/null
+++ b/sysdeps/x86/tst-shstk-legacy-1c-static.c
@@ -0,0 +1 @@
+#include "tst-shstk-legacy-1c.c"
diff --git a/sysdeps/x86/tst-shstk-legacy-1c.c b/sysdeps/x86/tst-shstk-legacy-1c.c
new file mode 100644
index 0000000000..eb218c6c70
--- /dev/null
+++ b/sysdeps/x86/tst-shstk-legacy-1c.c
@@ -0,0 +1,20 @@
+/* Check that legacy shadow stack code won't trigger segfault with
+ GLIBC_TUNABLES=glibc.cpu.hwcaps=-SHSTK
+ Copyright (C) 2023 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 "tst-shstk-legacy-1a.c"
--
2.40.1