Hi Yvan, Thanks. I made a mistake typed `export CROSS_COMPILER' that should be `export CROSS_COMPILE'. On Mon, Apr 28, 2014 at 04:40:09PM +0200, Yvan Roux wrote:

Hi Zhi-zhou,

having a %rax register here : Error: no such instruction: `mrs %rax,daif//arch_local_save_flags'

makes me think that you're using an x86_64 compiler and not the AArch64 one.

regards, Yvan

On 26 April 2014 03:10, Zhi-zhou Zhang zhizhou.zh@gmail.com wrote:

...

hi, For building arm64 kernel, I tried all toolchain released from http://releases.linaro.org/latest/components/toolchain/binaries/ But it complained about some instructions bad: /home/work/linux/arch/arm64/include/asm/irqflags.h: Assembler messages: /home/work/linux/arch/arm64/include/asm/irqflags.h:49: Error: no such instruction: `msr daifset,' /home/work/linux/arch/arm64/include/asm/irqflags.h:68: Error: no such instruction: `mrs %rax,daif//arch_local_save_flags' /home/work/linux/arch/arm64/include/asm/irqflags.h:49: Error: no such instruction: `msr daifset,' /home/work/linux/arch/arm64/include/asm/irqflags.h:68: Error: no such instruction: `mrs %rax,daif//arch_local_save_flags' /home/work/linux/arch/arm64/include/asm/irqflags.h:40: Error: no such instruction: `msr daifclr,' /home/work/linux/arch/arm64/include/asm/irqflags.h:68: Error: no such instruction: `mrs %rax,daif//arch_local_save_flags' /home/work/linux/arch/arm64/include/asm/irqflags.h:40: Error: no such instruction: `msr daifclr,'

Could anyone tell how to solve it? thanks!

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