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x86/cet: Add tests for GLIBC_TUNABLES=glibc.cpu.hwcaps=-SHSTK

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Verify that GLIBC_TUNABLES=glibc.cpu.hwcaps=-SHSTK turns off shadow
stack properly.
This commit is contained in:
H.J. Lu 2023-03-17 16:21:49 -07:00
parent 71c0cc3357
commit 9424ce80c2
3 changed files with 28 additions and 0 deletions
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7
sysdeps/x86/Makefile
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@ -171,10 +171,13 @@ 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 \
@ -272,6 +275,10 @@ $(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.

1
sysdeps/x86/tst-shstk-legacy-1c-static.c Normal file
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@ -0,0 +1 @@
#include "tst-shstk-legacy-1c.c"

20
sysdeps/x86/tst-shstk-legacy-1c.c Normal file
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@ -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"