On Mon, 01 May 2023 05:38:22 PDT (-0700), riba...@chromium.org wrote:
If PGO is enabled, the purgatory ends up with multiple .text sections. This is not supported by kexec and crashes the system.Cc: sta...@vger.kernel.org Fixes: 930457057abe ("kernel/kexec_file.c: split up __kexec_load_puragory") Signed-off-by: Ricardo Ribalda <riba...@chromium.org> --- arch/riscv/purgatory/Makefile | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/arch/riscv/purgatory/Makefile b/arch/riscv/purgatory/Makefile index 5730797a6b40..cf3a44121a90 100644 --- a/arch/riscv/purgatory/Makefile +++ b/arch/riscv/purgatory/Makefile @@ -35,6 +35,11 @@ CFLAGS_sha256.o := -D__DISABLE_EXPORTS CFLAGS_string.o := -D__DISABLE_EXPORTS CFLAGS_ctype.o := -D__DISABLE_EXPORTS +# When profile optimization is enabled, llvm emits two different overlapping +# text sections, which is not supported by kexec. Remove profile optimization +# flags. +KBUILD_CFLAGS := $(filter-out -fprofile-sample-use=% -fprofile-use=%,$(KBUILD_CFLAGS)) + # When linking purgatory.ro with -r unresolved symbols are not checked, # also link a purgatory.chk binary without -r to check for unresolved symbols. PURGATORY_LDFLAGS := -e purgatory_start -z nodefaultlib
Acked-by: Palmer Dabbelt <pal...@rivosinc.com>
