[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Powerpc IRQ handling breaks strict EABI compliance
- Date: Mon, 10 Feb 2003 16:31:55 -0600
- From: joel.sherrill at OARcorp.com (Joel Sherrill)
- Subject: Powerpc IRQ handling breaks strict EABI compliance
Valette Eric wrote:
> Till Straumann wrote:
> > OK, I fixed the motorola/shared BSP to not clobber R2/R13 anymore.
> Thanks a lot.
> > However, the question remains:
> > - who is responsible for the setup (calling __eabi()) ?
> > RTEMS or application code?
I just looked at gcc/config/rs6000/eabi.asm and I can't figure out why
I would want to run it. :) What is it doing anyway?
> I'm not sure we need to have to have all BSP being fully EABI compliant
> and thus frozing two registers. At least I'm not sure it was done on
> old-execption-handling compliant BSP. I think that what is important is
> that IRQ code does not prevent a specific BSP, or via a compilation
> option to be fully EABI compliant.
> Now, if for some reason fully EABI compliant code is more efficient
> because the compiler optimize something that is worth having two
> register less,
> My two cents,
> -- eric
Joel Sherrill, Ph.D. Director of Research & Development
joel at OARcorp.com On-Line Applications Research
Ask me about RTEMS: a free RTOS Huntsville AL 35805
Support Available (256) 722-9985