powerpc: Fix stackprotector detection for non-glibc toolchains

Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git

kernel os linux

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>

Michael Ellerman 7 years ago bf6cbd0c 50530f5e

+2 -1

1 changed file

expand all

arch

powerpc

Kconfig

+2 -1

arch/powerpc/Kconfig

··· 180 180 select HAVE_ARCH_SECCOMP_FILTER 181 181 select HAVE_ARCH_TRACEHOOK 182 182 select HAVE_CBPF_JIT if !PPC64 183 - select HAVE_STACKPROTECTOR if $(cc-option,-mstack-protector-guard=tls) 183 + select HAVE_STACKPROTECTOR if PPC64 && $(cc-option,-mstack-protector-guard=tls -mstack-protector-guard-reg=r13) 184 + select HAVE_STACKPROTECTOR if PPC32 && $(cc-option,-mstack-protector-guard=tls -mstack-protector-guard-reg=r2) 184 185 select HAVE_CONTEXT_TRACKING if PPC64 185 186 select HAVE_DEBUG_KMEMLEAK 186 187 select HAVE_DEBUG_STACKOVERFLOW