Vincent Pelletier <plr.vincent@xxxxxxxxx> writes:
> I fail to build 4.8.9 vanilla:
> Cannot use CONFIG_CC_STACKPROTECTOR_REGULAR: -fstack-protector not supported by compiler
Probably, debian's gcc default-pie issue. Below patch may fix it.
> I succeed to build 4.9-rc9 vanilla (starting from the same .config as
> with 4.8.9) but it then fails to load produced modules. During the
> build I have the following warnings:
> WARNING: "_copy_from_user" [drivers/hid/hid.ko] has no CRC!
Looks like, CONFIG_MODVERSIONS is broken. CONFIG_MODVERSIONS=n may fix it.
Thanks.
--
OGAWA Hirofumi <hirofumi@xxxxxxxxxxxxxxxxxx>
8ae94224c9d72fc4d9aaac93b2d7833cf46d7141
82031ea29e454b574bc6f49a33683a693ca5d907
90944e40ba1838de4b2a9290cf273f9d76bd3bdd
c6a385539175ebc603da53aafb7753d39089f32e
Signed-off-by: OGAWA Hirofumi <hirofumi@xxxxxxxxxxxxxxxxxx>
---
Makefile | 5 +++--
arch/x86/purgatory/Makefile | 1 +
scripts/gcc-x86_64-has-stack-protector.sh | 2 +-
3 files changed, 5 insertions(+), 3 deletions(-)
diff -puN Makefile~debian-pie-default-fix Makefile
--- linux/Makefile~debian-pie-default-fix 2016-11-26 22:57:00.681881071 +0900
+++ linux-hirofumi/Makefile 2016-11-26 22:57:00.683881081 +0900
@@ -399,11 +399,12 @@ KBUILD_CFLAGS := -Wall -Wundef -Wstric
-fno-strict-aliasing -fno-common \
-Werror-implicit-function-declaration \
-Wno-format-security \
- -std=gnu89
+ -std=gnu89 $(call cc-option,-fno-PIE)
+
KBUILD_AFLAGS_KERNEL :=
KBUILD_CFLAGS_KERNEL :=
-KBUILD_AFLAGS := -D__ASSEMBLY__
+KBUILD_AFLAGS := -D__ASSEMBLY__ $(call cc-option,-fno-PIE)
KBUILD_AFLAGS_MODULE := -DMODULE
KBUILD_CFLAGS_MODULE := -DMODULE
KBUILD_LDFLAGS_MODULE := -T $(srctree)/scripts/module-common.lds
diff -puN scripts/gcc-x86_64-has-stack-protector.sh~debian-pie-default-fix scripts/gcc-x86_64-has-stack-protector.sh
--- linux/scripts/gcc-x86_64-has-stack-protector.sh~debian-pie-default-fix 2016-11-26 22:57:00.681881071 +0900
+++ linux-hirofumi/scripts/gcc-x86_64-has-stack-protector.sh 2016-11-26 22:57:00.683881081 +0900
@@ -1,6 +1,6 @@
#!/bin/sh
-echo "int foo(void) { char X[200]; return 3; }" | $* -S -x c -c -O0 -mcmodel=kernel -fstack-protector - -o - 2> /dev/null | grep -q "%gs"
+echo "int foo(void) { char X[200]; return 3; }" | $* -S -x c -c -O0 -mcmodel=kernel -fno-PIE -fstack-protector - -o - 2> /dev/null | grep -q "%gs"
if [ "$?" -eq "0" ] ; then
echo y
else
diff -puN arch/x86/purgatory/Makefile~debian-pie-default-fix arch/x86/purgatory/Makefile
--- linux/arch/x86/purgatory/Makefile~debian-pie-default-fix 2016-11-26 22:57:00.682881076 +0900
+++ linux-hirofumi/arch/x86/purgatory/Makefile 2016-11-26 22:57:00.683881081 +0900
@@ -16,6 +16,7 @@ KCOV_INSTRUMENT := n
KBUILD_CFLAGS := -fno-strict-aliasing -Wall -Wstrict-prototypes -fno-zero-initialized-in-bss -fno-builtin -ffreestanding -c -MD -Os -mcmodel=large
KBUILD_CFLAGS += -m$(BITS)
+KBUILD_CFLAGS += $(call cc-option,-fno-PIE)
$(obj)/purgatory.ro: $(PURGATORY_OBJS) FORCE
$(call if_changed,ld)
_
--
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