On Thu, Feb 22, 2018 at 4:03 PM, Kees Cook <keesc...@chromium.org> wrote:
> On Thu, Feb 22, 2018 at 2:26 PM, kbuild test robot <l...@intel.com> wrote:
>> Hi Kees,
>>
>> I love your patch! Yet something to improve:
>>
>> [auto build test ERROR on linus/master]
>> [also build test ERROR on v4.16-rc2 next-20180222]
>> [if your patch is applied to the wrong git tree, please drop us a note to
>> help improve the system]
>>
>> url:
>> https://github.com/0day-ci/linux/commits/Kees-Cook/kconfig-h-Include-compiler-types-to-avoid-missed-struct-attributes/20180223-040717
>> config: mips-jz4740 (attached as .config)
>> compiler: mipsel-linux-gnu-gcc (Debian 7.2.0-11) 7.2.0
>> reproduce:
>> wget
>> https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O
>> ~/bin/make.cross
>> chmod +x ~/bin/make.cross
>> # save the attached .config to linux build tree
>> make.cross ARCH=mips
>>
>> All errors (new ones prefixed by >>):
>>
>>>> Error: arch/mips/boot/vmlinux.gz.its:201.1-2 syntax error
>> FATAL ERROR: Unable to parse input tree
>> /usr/bin/mkimage: Can't read arch/mips/boot/vmlinux.gz.itb.tmp: Invalid
>> argument
>> /usr/bin/mkimage Can't add hashes to FIT blob
>
> Ugh, the compiler_types.h commit breaks MIPS. I've reproduced this
> failure; debugging now....
For the MIPS folks, this is about 28128c61e08e ("kconfig.h: Include
compiler types to avoid missed struct attributes").
This hack fixes it ("struct" definitions were appearing in the
resulting its output files, which broke parsing):
diff --git a/arch/mips/boot/Makefile b/arch/mips/boot/Makefile
index 1bd5c4f00d19..c22da16d67b8 100644
--- a/arch/mips/boot/Makefile
+++ b/arch/mips/boot/Makefile
@@ -126,6 +126,7 @@ $(obj)/vmlinux.its.S: $(addprefix
$(srctree)/arch/mips/$(PLATFORM)/,$(ITS_INPUTS
quiet_cmd_cpp_its_S = ITS $@
cmd_cpp_its_S = $(CPP) $(cpp_flags) -P -C -o $@ $< \
+ -D__ASSEMBLY__ \
-DKERNEL_NAME="\"Linux $(KERNELRELEASE)\"" \
-DVMLINUX_BINARY="\"$(3)\"" \
-DVMLINUX_COMPRESSION="\"$(2)\"" \
I assume since this is overloading a .S build rule, the __ASSEMBLY__
define went missing from cpp_flags?
I'm trying to figure out if there is a better solution; ideas welcome!
-Kees
--
Kees Cook
Pixel Security
