Question on PowerPC setjmp/longjmp ABI

[Richard Henderson]

On Sat, Feb 17, 2001 at 07:09:41PM -0600, Troy Benjegerdes wrote:
> Please correct me if I'm wrong, but then what happens if a process is 
> using Altivec and gets a signal? Isn't there a potential for altivec 
> registers to get clobbered?

No, that's a kernel issue.

> Aside from that, the Altivec Programmers Interface Manual says that 
> altivec registers 20-31 are to be saved by setjmp/longjmp on the SVR4 ABI.

Then there _are_ ABI changes -- the ABI before Altivec is not
completely compatible with the one after.


r~