[SOLVED] Unable to cross compile assembly

[erlkingh]

I'm unable to compile using arm-none-eabi-gcc toolchain.
The error I get is:

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boot.S: Assembler messages:
boot.S:7: Error: ARM register expected -- `mrs x0,mpidr_el1'
boot.S:8: Error: ARM register expected -- `and x0,x0,#0xFF'
boot.S:9: Error: selected processor does not support `cbz x0,master' in ARM mode
boot.S:16: Error: ARM register expected -- `adr x0,bss_begin'
boot.S:17: Error: ARM register expected -- `adr x1,bss_end'
boot.S:18: Error: ARM register expected -- `sub x1,x1,x0'

The flags are:

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-mcpu=cortex-a53 -mfpu=neon-fp-armv8 -mneon-for-64bits -mfloat-abi=hard -mlittle-endian -munaligned-access

I've spent quite a lot of time resolving other issues so I'm probably missing something with this one.

[DavidS]

Looks like you are using AARCH64 instructions. Are you targetting a system running in AARCH64?

Though you may have to tell gcc that you are targetting AARCH64 as it likely defaults to standard ARM, even when targeting the A53.

[erlkingh]

Yeah, that was the case.

I changed the toolchain to aarch64-linux-gnu, everything works fine.

My mistake was downloading a toolchain for the Cortex-RM processors.

Guess It’s solved now.