Internal assembler error for instruction icbt

hi All,
i have LTIB version 6.2.2 with which i have built linux kernel 2.6.19-rc5 for my board where its processor is MPC8555.i built the kernel Image successfuly without any problems
But Now i want to upgrade the linux kernel to 2.6.27 but unfortunately i got the following error:

************************************************************************
Using /home/test/ltib-6.2.2-sv/rpm/BUILD/linux-2.6.27 as source for kernel

 GEN     /home/test/ltib-6.2.2-sv/rpm/BUILD/kbuild/mpc8555amc/Makefile
 CHK     include/linux/version.h
 CHK     include/linux/utsrelease.h

CALL
/home/test/ltib-6.2.2-sv/rpm/BUILD/linux-2.6.27/scripts/checksyscalls.sh
CHK include/linux/compile.h
CALL
/home/test/ltib-6.2.2-sv/rpm/BUILD/linux-2.6.27/arch/powerpc/kernel/systbl_chk.sh
CC arch/powerpc/kernel/prom_init.o
CALL
/home/test/ltib-6.2.2-sv/rpm/BUILD/linux-2.6.27/arch/powerpc/kernel/prom_init_check.sh
BOOTCC arch/powerpc/boot/4xx.o
Assembler messages:
Error: Internal assembler error for instruction icbt
Internal error, aborting at /usr/src/RPM/BUILD/crosstool/source/binutils-2.15/gas/config/tc-ppc.c line 1300 in ppc_setup_opcodes
Please report this bug.
make[2]: *** [arch/powerpc/boot/4xx.o] Error 2
make[1]: *** [zImage] Error 2
make: *** [sub-make] Error 2
error: Bad exit status from /home/test/ltib-6.2.2-sv/tmp/rpm-tmp.81042 (%build)

RPM build errors:

   Bad exit status from /home/test/ltib-6.2.2-sv/tmp/rpm-tmp.81042  

(%build)
Failed building kernel-2.6.27-mpc8555amc
************************************************************************

i think that i have to upgrade the cross toolchain that i m using, actually it is version 3.4.3?
is there a certain version of toolchain that i have to use to build linux kernel 2.6.27?

My last question is how can i upgrade the toolchain i m using?

hi All,
i have LTIB version 6.2.2 with which i have built linux kernel 2.6.19-rc5 for my board where its processor is MPC8555.i built the kernel Image successfuly without any problems
But Now i want to upgrade the linux kernel to 2.6.27 but unfortunately i got the following error:

************************************************************************
Using /home/test/ltib-6.2.2-sv/rpm/BUILD/linux-2.6.27 as source for
kernel

  GEN     /home/test/ltib-6.2.2-sv/rpm/BUILD/kbuild/mpc8555amc/Makefile
  CHK     include/linux/version.h
  CHK     include/linux/utsrelease.h

CALL
/home/test/ltib-6.2.2-sv/rpm/BUILD/linux-2.6.27/scripts/checksyscalls.sh
CHK include/linux/compile.h
CALL
/home/test/ltib-6.2.2-sv/rpm/BUILD/linux-2.6.27/arch/powerpc/kernel/systbl_chk.sh
CC arch/powerpc/kernel/prom_init.o
CALL
/home/test/ltib-6.2.2-sv/rpm/BUILD/linux-2.6.27/arch/powerpc/kernel/prom_init_check.sh
BOOTCC arch/powerpc/boot/4xx.o
Assembler messages:
Error: Internal assembler error for instruction icbt
Internal error, aborting at /usr/src/RPM/BUILD/crosstool/source/binutils-2.15/gas/config/tc-ppc.c line 1300 in ppc_setup_opcodes
Please report this bug.
make[2]: *** [arch/powerpc/boot/4xx.o] Error 2
make[1]: *** [zImage] Error 2
make: *** [sub-make] Error 2
error: Bad exit status from /home/test/ltib-6.2.2-sv/tmp/rpm-tmp.81042 (%build)

RPM build errors:

    Bad exit status from /home/test/ltib-6.2.2-sv/tmp/rpm-tmp.81042

(%build)
Failed building kernel-2.6.27-mpc8555amc
************************************************************************

i think that i have to upgrade the cross toolchain that i m using, actually it is version 3.4.3?
is there a certain version of toolchain that i have to use to build linux kernel 2.6.27?

My last question is how can i upgrade the toolchain i m using?

thanks in advance for ur help