From 40284a072c42f6177184fb1f62ba94c69e0c0277 Mon Sep 17 00:00:00 2001 From: Tobias Klauser Date: Wed, 29 Jul 2020 09:51:29 +0200 Subject: riscv: disable stack-protector for vDSO Currently, building the vDSO with clang leads assembler errors like the following: /tmp/vgettimeofday-1ae0d2.s: Assembler messages: /tmp/vgettimeofday-1ae0d2.s:28: Error: bad expression /tmp/vgettimeofday-1ae0d2.s:28: Error: illegal operands `auipc a2,%got_pcrel_hi(__stack_chk_guard)' Disable the stack-protector for vDSO to fix these. Link: https://github.com/ClangBuiltLinux/linux/issues/1112 Signed-off-by: Tobias Klauser Signed-off-by: Palmer Dabbelt --- arch/riscv/kernel/vdso/Makefile | 2 ++ 1 file changed, 2 insertions(+) (limited to 'arch/riscv') diff --git a/arch/riscv/kernel/vdso/Makefile b/arch/riscv/kernel/vdso/Makefile index c8c9e40023c6..478e7338ddc1 100644 --- a/arch/riscv/kernel/vdso/Makefile +++ b/arch/riscv/kernel/vdso/Makefile @@ -16,6 +16,8 @@ vdso-syms += flush_icache # Files to link into the vdso obj-vdso = $(patsubst %, %.o, $(vdso-syms)) note.o +ccflags-y := -fno-stack-protector + ifneq ($(c-gettimeofday-y),) CFLAGS_vgettimeofday.o += -fPIC -include $(c-gettimeofday-y) endif -- cgit v1.2.3