Re: [RFC]: MD_FALLBACK_FRAME_STATE_FOR macro for darwin PPC

[Andreas Tobler <toa at pop dot agri dot ch>]

Geoffrey Keating wrote:

> On 20/01/2004, at 12:37 PM, Andreas Tobler wrote:
>
> > So, the question is, how do I check inside darwin.h which OS version I 
> > have?
>
>
> You check with code like this:
>
> > +    if (*(unsigned int *) (pc_ + 0) != 0x2e1e0032)            \
> > +      break;                                \
> > +    if (*(unsigned int *) (pc_ + 4) == 0x40be0050            \
> > +    || *(unsigned int *) (pc_ + 4) == 0x41920010)            \
>
>
> You should make enough tests to make sure that you don't falsely 
> identify any darwin version (past or future), by checking every 
> instruction that would have been executed on a return from a signal 
> handler.

Hm!

future?

Well, I have limited resources here, one powerbook, which is three years 
old and is also my production machine.

I see what I can do. It will certainly take a longer time.

Also I have first to find out about all different versions and how to 
get them. ( I hope I understood you right)


Andreas*

*wondering why this macro has not already been implemented before..... 
seems so easy.