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authorMichal Kubecek <mkubecek@suse.cz>2018-05-16 07:51:36 +0200
committerMasahiro Yamada <yamada.masahiro@socionext.com>2018-05-17 22:36:40 +0900
commit8438ee76b004ef66d125ade64c91fc128047d244 (patch)
tree3c174fe99238cf40d957fc4bb4844019226ed0a7
parentc64ba044ed57ea72cc1c7b14a8dcfb6ded5a759c (diff)
Makefile: disable PIE before testing asm goto
Since commit e501ce957a78 ("x86: Force asm-goto"), aarch64 build on distributions which enable PIE by default (e.g. openSUSE Tumbleweed) does not detect support for asm goto correctly. The problem is that ARM specific part of scripts/gcc-goto.sh fails with PIE even with recent gcc versions. Moving the asm goto detection up in Makefile put it before the place where we disable PIE. As a result, kernel is built without jump label support. Move the lines disabling PIE before the asm goto test to make it work. Fixes: e501ce957a78 ("x86: Force asm-goto") Reported-by: Andreas Faerber <afaerber@suse.com> Signed-off-by: Michal Kubecek <mkubecek@suse.cz> Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org> Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
-rw-r--r--Makefile5
1 files changed, 3 insertions, 2 deletions
diff --git a/Makefile b/Makefile
index ba090852805c..89be971fa9be 100644
--- a/Makefile
+++ b/Makefile
@@ -500,6 +500,9 @@ RETPOLINE_CFLAGS_CLANG := -mretpoline-external-thunk
RETPOLINE_CFLAGS := $(call cc-option,$(RETPOLINE_CFLAGS_GCC),$(call cc-option,$(RETPOLINE_CFLAGS_CLANG)))
export RETPOLINE_CFLAGS
+KBUILD_CFLAGS += $(call cc-option,-fno-PIE)
+KBUILD_AFLAGS += $(call cc-option,-fno-PIE)
+
# check for 'asm goto'
ifeq ($(call shell-cached,$(CONFIG_SHELL) $(srctree)/scripts/gcc-goto.sh $(CC) $(KBUILD_CFLAGS)), y)
CC_HAVE_ASM_GOTO := 1
@@ -621,8 +624,6 @@ endif # $(dot-config)
# Defaults to vmlinux, but the arch makefile usually adds further targets
all: vmlinux
-KBUILD_CFLAGS += $(call cc-option,-fno-PIE)
-KBUILD_AFLAGS += $(call cc-option,-fno-PIE)
CFLAGS_GCOV := -fprofile-arcs -ftest-coverage \
$(call cc-option,-fno-tree-loop-im) \
$(call cc-disable-warning,maybe-uninitialized,)