| Message ID | 20220801191721.1253291-1-Ben.Wolsieffer@hefring.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | ARM: disable FDPIC ABI | expand |
On 8/1/22 20:17, Ben Wolsieffer wrote: > When building with an arm-*-uclinuxfdpiceabi toolchain, the FDPIC ABI is > enabled by default but should not be used to build the kernel. > Therefore, pass -mno-fdpic if supported by the compiler. > > Signed-off-by: Ben Wolsieffer <Ben.Wolsieffer@hefring.com> > --- > arch/arm/Makefile | 3 +++ > 1 file changed, 3 insertions(+) > > diff --git a/arch/arm/Makefile b/arch/arm/Makefile > index c8e3633f5434..88be49b71d40 100644 > --- a/arch/arm/Makefile > +++ b/arch/arm/Makefile > @@ -22,6 +22,9 @@ GZFLAGS :=-9 > # Never generate .eh_frame > KBUILD_CFLAGS += $(call cc-option,-fno-dwarf2-cfi-asm) > > +# Disable FDPIC ABI > +KBUILD_CFLAGS += $(call cc-option,-mno-fdpic) > + > # This should work on most of the modern platforms > KBUILD_DEFCONFIG := multi_v7_defconfig > Without patch I'm getting scripts/link-vmlinux.sh: line 52: 312779 Segmentation fault (core dumped) ${ld} ${ldflags} -o ${output} ${wl}--whole-archive ${objs} ${wl}--no-whole-archive ${wl}--start-group ${libs} ${wl}--end-group $@ ${ldlibs} So, FWIW: Reviewed-by: Vladimir Murzin <vladimir.murzin@arm.com> Tested-by: Vladimir Murzin <vladimir.murzin@arm.com> Unless you get any other comments, please, drop it into RMK's patch system [1]. [1] https://www.armlinux.org.uk/developer/patches/ P.S. Extra thanks for Buildroot patches, they were handy to build FDPIC toolchain and test the patch! Cheers Vladimir
diff --git a/arch/arm/Makefile b/arch/arm/Makefile index c8e3633f5434..88be49b71d40 100644 --- a/arch/arm/Makefile +++ b/arch/arm/Makefile @@ -22,6 +22,9 @@ GZFLAGS :=-9 # Never generate .eh_frame KBUILD_CFLAGS += $(call cc-option,-fno-dwarf2-cfi-asm) +# Disable FDPIC ABI +KBUILD_CFLAGS += $(call cc-option,-mno-fdpic) + # This should work on most of the modern platforms KBUILD_DEFCONFIG := multi_v7_defconfig
When building with an arm-*-uclinuxfdpiceabi toolchain, the FDPIC ABI is enabled by default but should not be used to build the kernel. Therefore, pass -mno-fdpic if supported by the compiler. Signed-off-by: Ben Wolsieffer <Ben.Wolsieffer@hefring.com> --- arch/arm/Makefile | 3 +++ 1 file changed, 3 insertions(+)