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BACKPORT: FROMLIST: arm64: vdso: disable Shadow Call Stack

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Shadow stacks are only available in the kernel, so disable SCS
instrumentation for the vDSO.

Bug: 145210207
Change-Id: I6e01b2c7788ba52d3b754b1fbd5bfb908b45741b
(am from https://lore.kernel.org/patchwork/patch/1149061/)
Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>
Reviewed-by: Kees Cook <keescook@chromium.org>
Reviewed-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Sami Tolvanen <samitolvanen@google.com>
This commit is contained in:
Sami Tolvanen 2018-05-02 11:05:53 -07:00 committed by Alistair Delva
parent 947e357d12
commit f49ee5bd17
1 changed files with 2 additions and 0 deletions
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2
arch/arm64/kernel/vdso/Makefile
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@ -17,6 +17,8 @@ ccflags-y += -nostdlib -Wl,-soname=linux-vdso.so.1 \
$(call cc-ldoption, -Wl$(comma)--hash-style=sysv)
ccflags-y += $(DISABLE_LTO)
CFLAGS_REMOVE_vgettimeofday.o += $(CC_FLAGS_SCS)
# Disable gcov profiling for VDSO code
GCOV_PROFILE := n