From 40d1a07b333ef1f7fce11ee20b8f4281d1a75fb9 Mon Sep 17 00:00:00 2001 From: Max Filippov Date: Mon, 27 Mar 2017 02:44:47 -0700 Subject: xtensa: enable stack protector The implementation is adopted from the ARM arch. GCC 7.3, 8 or newer is required for building the xtensa kernel with SSP. Signed-off-by: Max Filippov --- arch/xtensa/kernel/entry.S | 6 ++++++ 1 file changed, 6 insertions(+) (limited to 'arch/xtensa/kernel/entry.S') diff --git a/arch/xtensa/kernel/entry.S b/arch/xtensa/kernel/entry.S index a27a9a65635b..5caff0744f3c 100644 --- a/arch/xtensa/kernel/entry.S +++ b/arch/xtensa/kernel/entry.S @@ -1971,6 +1971,12 @@ ENTRY(_switch_to) s32i a1, a2, THREAD_SP # save stack pointer #endif +#if defined(CONFIG_CC_STACKPROTECTOR) && !defined(CONFIG_SMP) + movi a6, __stack_chk_guard + l32i a8, a3, TASK_STACK_CANARY + s32i a8, a6, 0 +#endif + /* Disable ints while we manipulate the stack pointer. */ irq_save a14, a3 -- cgit v1.2.3