Re: [arm-gnu] [CSL 2005Q3-2 problem report] bad immediate value for half-word offset

[Paul Brook <paul@xxxxxxxxxxxxxxxx>]

On Tuesday 27 December 2005 22:48, Carlos O'Donell wrote:
> On Mon, Dec 26, 2005 at 07:20:33PM +0900, NAGATA Shoji wrote:
> > /home/*****/CSQ3-2/v6m_le/lib/gcc/arm-none-linux-gnueabi/3.4.4/../../../.
> >./arm-none-linux-gnueabi/bin/as -march=armv6j -mfloat-abi=softfp -mfpu=vfp
> > -meabi=4 -o sample.o /tmp/ccXW2lCZ.s /tmp/ccXW2lCZ.s: Assembler messages:
> > /tmp/ccXW2lCZ.s:121: Error: bad immediate value for half-word offset
> > (256)
>
> Reproduced. This is a problem with GCC and the offset that ldrsb is able
> to access. I have filed this issue with our internal systems tracker.
>
> This is a very specific bug, and any changes to the code will make the
> output insn sequence the right length and the load will assemble. The
> only workaround I can recommend is reordering some of the variable read
> and writes.

Compiling at a different optimization level may also work around the bug.

Paul