Nuking unexec

[Malcolm Purvis]

>>>>> "Ben" == Ben Wing <ben at 666.com> writes:

Ben> I find that hard to believe; I wonder what his reasons are ...

Some of the objects that get dumped contain function pointers.  In the IA64
ABI, these point to a descriptor containing { &code, &data_context }.  At the
very least data_context varies between machines and across reboots (I'm not
sure about per process).  Data_context is so machine dependant that there is
no useful way that we can get access to it in XEmacs.

SuSe have a patch to 21.4 that re-assigns these function pointers at startup
(in a similar vein to reinit_vars_of_X()).  It's pretty invasive but I think
it's the only way we can work around it.  I've a dusty workspace that tries to
clean the patch up a bit but haven't worked on it recently for a lack of two
IA64 boxes to try it on (I'm not allowed to reboot the one I've access to).

Emacs doesn't have this problem because I don't think it dumps function
pointers.

Malcolm

-- 
		     Malcolm Purvis <malcolmp at xemacs.org>