[MiNT] Modification of stack in sig_mach.c

[Olivier Landemarre <olivier.landemarre@utbm.fr>]

Hello

I have a technical question in sig_mach.c for mint.

In function sendsig() there a calculation for change stack position, I 
understand the principle but I not understand value put in this line:

newstack = ((long) &newcurrent) - 0x40 - 12;

what are 0x40 and 12 values? With what do correspond these values?

Thanks

Olivier