[PATCH] powerpc: Fix stackprotector detection for non-glibc toolchains
From: Michael Ellerman <mpe@ellerman.id.au>
Date: 2018-10-12 23:00:20
Subsystem:
linux for powerpc (32-bit and 64-bit), the rest · Maintainers:
Madhavan Srinivasan, Linus Torvalds
If GCC is not built with glibc support then we must explicitly tell it which register to use for TLS mode stack protector, otherwise it will error out and the cc-option check will fail. Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> --- arch/powerpc/Kconfig | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
index 1888636c9eb6..3d008115fe18 100644
--- a/arch/powerpc/Kconfig
+++ b/arch/powerpc/Kconfig@@ -180,7 +180,8 @@ config PPC select HAVE_ARCH_SECCOMP_FILTER select HAVE_ARCH_TRACEHOOK select HAVE_CBPF_JIT if !PPC64 - select HAVE_STACKPROTECTOR if $(cc-option,-mstack-protector-guard=tls) + select HAVE_STACKPROTECTOR if PPC64 && $(cc-option,-mstack-protector-guard=tls -mstack-protector-guard-reg=r13) + select HAVE_STACKPROTECTOR if PPC32 && $(cc-option,-mstack-protector-guard=tls -mstack-protector-guard-reg=r2) select HAVE_CONTEXT_TRACKING if PPC64 select HAVE_DEBUG_KMEMLEAK select HAVE_DEBUG_STACKOVERFLOW
--
2.17.1