Re: [arm-gnu] Assembler error for cortex-m3

[Richard Earnshaw <rearnsha@xxxxxxx>]

On 13/06/11 20:31, Chris Elliott wrote:
> I am compiling some assembler code for cortex-m3 and get an error.
> The same error occurs with either gcc or as.
> 
> arm-2011.03/bin/arm-none-eabi-gcc -mcpu=cortex-m3 -march=armv7-m -c -o
> test.o startup_LPC17xx.s
> startup_LPC17xx.s:138: Error: Thumb does not support this addressing
> mode -- `strb R2,[R0],#1'
> 
> This addressing mode is listed as supported in my reference documents
> for the LPC1768 processor.
> Any idea why the compiler doesn't think it is supported?
> 
> Thanks,
> -Chris
> 
> 


Try adding

	.syntax unified

at the top of your assembly file.

R.