Date: Tue, 15 Sep 1998 15:30:57 +0200 (CEST) From: Mikael Karpberg <karpen@ocean.campus.luth.se> To: kheuer@gwdu60.gwdg.de (Konrad Heuer) Cc: freebsd-hackers@FreeBSD.ORG Subject: Re: Catching SIGSEGV Message-ID: <199809151330.PAA00371@ocean.campus.luth.se> In-Reply-To: <Pine.BSF.3.96.980915114921.5972A-100000@gwdu60.gwdg.de> from Konrad Heuer at "Sep 15, 98 12:22:11 pm"
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According to Konrad Heuer:
> int nsegv = 0;
> int *ptr;
> int zero = 0;
>
> void sighdl ( int sig )
> {
> ptr = &zero;
> nsegv++;
> }
>
> int dowork ( )
> {
> int buf;
>
> signal(SIGSEGV, sighdl);
>
> ptr = InvalidAddress;
> buf = *ptr;
> }
My guess is that you would want to declare things like this:
volatile int nsegv = 0;
volatile int *ptr;
int zero = 0;
Then the restarted "buf = *ptr;" line will not use a buffered value for ptr
but read it from memory. I think.
/Mikael
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