[LLVMdev] ARM cross compiling causes segmentation fault

[Dale Johannesen]

On Jul 8, 2009, at 12:52 PMPDT, Won J Jeon wrote:

> I tried a couple of options (-mcpu=arm1136j-s, -mcpu=arm1136jf-s, - 
> march=armv6, ...) to let the compile know the specific ARM  
> processor, but the same issue is still there. I tried to take a look  
> at .s file in /tmp directory, but it's already cleaned up. Is it  
> because I enabled the optimization option when I compiled llvm?

Use -S to keep the assembly file around.

You don't seem to be very familiar with compilers, please try to  
figure things like this out from the documentation first.

> Regards,
> Won
>
> On Wed, Jul 8, 2009 at 1:28 PM, Dale Johannesen <dalej at apple.com>  
> wrote:
>
> On Jul 8, 2009, at 11:04 AMPDT, Won J Jeon wrote:
>
> > Hello,
> >
> > I built a llvm toolchain for ARM and I'm trying to build a simple
> > application on ARM using LLVM. When I compiled the code, it has the
> > following message and the binary code has a segmentation fault when
> > it is executed.
> >
> > /tmp/ccJPjMe4.s: Assembler messages:
> > /tmp/ccJPjMe4.s:4250: rdhi, rdlo and rm must all be different
> > /tmp/ccJPjMe4.s:4589: rdhi, rdlo and rm must all be different
> > /tmp/ccJPjMe4.s:4694: rdhi, rdlo and rm must all be different
> > /tmp/ccJPjMe4.s:4899: rdhi, rdlo and rm must all be different
> > /tmp/ccJPjMe4.s:4915: rdhi, rdlo and rm must all be different
>
> Make sure you've told the compiler the correct version of ARM;
> different generations of the architecture have different restrictions
> of this sort.
> Look at the .s file to see what instruction it's complaining about.
> (MUL had such a restriction in early versions of ARM, but I'd expect
> the message to read differently if that's it.)
> If you've told the compiler the right version of ARM and you think the
> compiler is wrong, file a bug with reproducible example.
>
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