http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54983
Bug #: 54983
Summary: ARM gcc creates invalid assembly: bad immediate value
for 8-bit offset (1024)
Classification: Unclassified
Product: gcc
Version: 4.6.3
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
AssignedTo: unassig...@gcc.gnu.org
ReportedBy: hec...@gmail.com
Created attachment 28488
--> http://gcc.gnu.org/bugzilla/attachment.cgi?id=28488
Includes a .config to build the v3.7-rc1 kernel and the --save-temps file
The bug appeared on new linux ARM kernel versions and I cite here a kernel
maintainer responding to my patch submission:
"Hi, I used to be able to compile MTD stuff for mackerel board with the
defconfig attached, but now it fails with 3.7-rc1 with as error:
/tmp/cc2Nr7AN.s: Error: bad immediate value for 8-bit offset (1024)
It fails for dogc4.c, but if I disable DOCG4, it fails for other drivers
with a similar error.
I've tried (arm) gcc 4.6.3 and the latest Linaro 4.7 build."
In order to reproduce the bug, please get a repository of the kernel and
checkout "v3.7-rc1" and use the attached .config. The bug happens when building
the modules. I'm sorry but I see no way figuring out all the dependencies of a
kernel build to supply a more compact way to test this. I used
make -j16 ARCH=arm CROSS_COMPILE=arm-linux-gnueabi- modules
and get the error:
/tmp/ccwLMdCy.s: Assembler messages:
/tmp/ccwLMdCy.s: Error: bad immediate value for 8-bit offset (2048)
make[3]: *** [drivers/mtd/nand/docg4.o] Error 1
# arm-linux-gnueabi-gcc -v
Using built-in specs.
COLLECT_GCC=arm-linux-gnueabi-gcc
COLLECT_LTO_WRAPPER=/usr/lib/gcc/arm-linux-gnueabi/4.6/lto-wrapper
Target: arm-linux-gnueabi
Configured with: ../src/configure -v --with-pkgversion='Ubuntu/Linaro
4.6.3-1ubuntu5' --with-bugurl=file:///usr/share/doc/gcc-4.6/README.Bugs
--enable-languages=c,c++,fortran,objc,obj-c++ --prefix=/usr
--program-suffix=-4.6 --enable-shared --enable-linker-build-id
--with-system-zlib --libexecdir=/usr/lib --without-included-gettext
--enable-threads=posix
--with-gxx-include-dir=/usr/arm-linux-gnueabi/include/c++/4.6.3
--libdir=/usr/lib --enable-nls --enable-clocale=gnu --enable-libstdcxx-debug
--enable-libstdcxx-time=yes --enable-gnu-unique-object --enable-plugin
--enable-objc-gc --enable-multilib --disable-sjlj-exceptions
--with-arch=armv7-a --with-float=softfp --with-fpu=vfpv3-d16 --with-mode=thumb
--disable-werror --enable-checking=release --build=x86_64-linux-gnu
--host=x86_64-linux-gnu --target=arm-linux-gnueabi
--program-prefix=arm-linux-gnueabi- --includedir=/usr/arm-linux-gnueabi/include
--with-headers=/usr/arm-linux-gnueabi/include
--with-libs=/usr/arm-linux-gnueabi/lib
Thread model: posix
gcc version 4.6.3 (Ubuntu/Linaro 4.6.3-1ubuntu5)
Best,
Bastian Hecht
