riscv: Add STACKPROTECTOR supported

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The -fstack-protector & -fstack-protector-strong features are from
gcc. The patch only add basic kernel support to stack-protector
feature and some arch could have its own solution such as
ARM64_PTR_AUTH.

After enabling STACKPROTECTOR and STACKPROTECTOR_STRONG, the .text
size is expanded from  0x7de066 to 0x81fb32 (only 5%) to add canary
checking code.

Signed-off-by: Guo Ren <guoren@linux.alibaba.com>
Reviewed-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>

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Guo Ren 2020-07-10 16:19:57 +00:00 • committed by Palmer Dabbelt

parent 08b5985e7b

commit f2c9699f65

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1

arch/riscv/Kconfig

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33

arch/riscv/include/asm/stackprotector.h

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6

arch/riscv/kernel/process.c

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