that's true -
__builtin_frame_address() may vary upon real r1/r4 value.
There are some new builtins impolemented in 3.4 and which will fix this
problem. So, just downgrade to 3.2 (3.3 really isn' any better) .
~d
On Friday 05 September 2003 01:59, Hunter Ware wrote:
> long time lurker, first time caller. *grin*
>
> I've been using a version of mspgcc and gcc-3.2.3 with a 6+ month old
> msplibc for a while now and decided to upgrade. A side question for the
> group is: is it unwise to move to gcc-3.3.1 with mspgcc? (I like the
> move as it's the same version we use for host and arm development).
>
> In gcc-3.3.1 __FUNCTION__ functionality has been changed to more
> closely match C99 specs. This means that iomacros.h:BIC_SR_IRQ no
> longer compiles without a warning about deprecated string concat of
> __FUNCTION__. I decided to try and fix this for us and ran into a
> problem with __builtin_frame_address.
>
> I think the proper way to do _BIC_SR_IRQ is:
>
> #define _BIC_SR_IRQ(x)\
> {\
> void* addr = __builtin_frame_address(0);
> __asm__ __volatile__ (\
> "bic %0, %1 : : "i" ((uint16_t)x), "o" ((uint16_t)addr)\
> )\
> }
>
> the problem is that __builtin_frame_address does not return the start of
> frame, it instead just returns the current stack pointer. I tried to
> figure out where this is broken but got pretty lost in builtins.c and
> couldn't really get anywhere. Any ideas?
>
> Thanks,
> Hunter
>
>
>
>
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