diff options
| author | Guo Ren | 2020-07-10 16:19:57 +0000 |
|---|---|---|
| committer | Palmer Dabbelt | 2020-07-30 11:37:39 -0700 |
| commit | f2c9699f65557a31fed4ddb9e5b4d9489b1bf32f (patch) | |
| tree | 944424af9ffbfbb6ac6dafef33202045a2e8da4c /arch/riscv/kernel/process.c | |
| parent | 08b5985e7be54d15d058191adda2722bd395df32 (diff) | |
riscv: Add STACKPROTECTOR supported
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>
Diffstat (limited to 'arch/riscv/kernel/process.c')
| -rw-r--r-- | arch/riscv/kernel/process.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/arch/riscv/kernel/process.c b/arch/riscv/kernel/process.c index 824d117cf202..65489297ed2e 100644 --- a/arch/riscv/kernel/process.c +++ b/arch/riscv/kernel/process.c @@ -24,6 +24,12 @@ register unsigned long gp_in_global __asm__("gp"); +#ifdef CONFIG_STACKPROTECTOR +#include <linux/stackprotector.h> +unsigned long __stack_chk_guard __read_mostly; +EXPORT_SYMBOL(__stack_chk_guard); +#endif + extern asmlinkage void ret_from_fork(void); extern asmlinkage void ret_from_kernel_thread(void); |