Subject: Re: signal(SIGSEGV, SIG_IGN) -> 100% CPU
To: None <firstname.lastname@example.org>
From: der Mouse <mouse@Rodents.Montreal.QC.CA>
Date: 06/12/1999 10:41:48
> You remember correctly about /bin/sh. This was especially amusing to
> the people porting v7 UNIX to the mc68000, which didn't keep enough
> state to restart the faulting instruction...
I seem to recall hearing of some machine that had two 68ks in it, one
running one instruction behind the other. When the active one took a
trap, the other one was frozen, one instruction behind, so it could
become the active one and thus "restart" the faulting instruction.
I can see all sorts of problems with such a scheme, but if the machine
ever worked, someone clearly found solutions....
7D C8 61 52 5D E7 2D 39 4E F1 31 3E E8 B3 27 4B