Re: [arm-gnu] Problem with u-boot compiled with 2006q1-3

[Richard Earnshaw <rearnsha@xxxxxxx>]

On Thu, 2006-05-18 at 09:24, Tomi.Valkeinen@xxxxxxxxx wrote:
> Hi,
> 
> I was unable to run u-boot compiled with the newest codesourcery
> toolchain and after debugging I got the problem isolated to an example
> below. U-boot breaks with -Os but works with -O0, but the example below
> does not work with either one. Earlier toolchains work.
> 
> It looks like gcc does not obey the instruction to use r8 for gd
> variable in main function, and so the program crashes when func() uses
> gd which it thinks is in r8. Is this a bug in u-boot code or in gcc?
> 
> Best regards,
>  Tomi Valkeinen
> 

This is a bug in uboot.

int main()
{
  register volatile gd_t *gd asm("r8");

Does not declare a global register.  It declares a local variable in r8.

You need to contact the uboot maintainers and get them to fix the
problem in their sources.

R.