[llvm-commits] [PATCH] Segmented stack fixes, support for Mac, Win32, FreeBSD

[Sanjoy Das]

Hi,

> On patch 06:
> Saving the scratch register is safe because you known there is always
> some reserve space left?

This is safe at least on libgcc since it allocates some extra space
(beyond the amount asked for).

>From morestack.S:

# The amount of extra space we ask for.  In general this has to be
# enough for the dynamic loader to find a symbol and for a signal
# handler to run.
	
#ifndef __x86_64__
#define BACKOFF (1024)
#else
#define BACKOFF (1536)
#endif

> Sanjoy, any other comments?

Nothing other than the points already mentioned.

Thanks!
-- 
Sanjoy Das
http://playingwithpointers.com