From: Brantley Coile <brantleycoile@me.com>
To: Fans of the OS Plan 9 from Bell Labs <9fans@9fans.net>
Subject: Re: [9fans] Undefined Behaviour in C
Date: Thu, 26 Nov 2015 18:55:10 -0500 [thread overview]
Message-ID: <BEA76D76-0013-4231-BFB2-CEC3273C9F38@me.com> (raw)
In-Reply-To: <F7EDFB47-E062-41C3-A16E-EB1B790D3B93@quintile.net>
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I did a port just like that (DTS Generic Unix) just to see what it would be like. It was awful. I’ll never do that again.
> On Nov 26, 2015, at 6:14 PM, Steve Simon <steve@quintile.net> wrote:
>
>
> I don't know about the PDP but the VAX allowed access to address zero.
>
> Even more insidious, it allowed you to dereference a null pointer and guaranteed it would contain a zero, which resulted in many tiresome portability issues - I used Interdatas at the time, which faulted on a read at address zero.
>
> -Steve
>
>
> On 26 Nov 2015, at 17:48, Bakul Shah <bakul@bitblocks.com <mailto:bakul@bitblocks.com>> wrote:
>
>> Good points! Though 0 was a valid address on pdp11, right?
>>>>>>
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next prev parent reply other threads:[~2015-11-26 23:55 UTC|newest]
Thread overview: 40+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-11-23 10:20 Ramakrishnan Muthukrishnan
2015-11-23 11:20 ` Vasudev Kamath
2015-11-25 10:27 ` Alexandru Gheorghe
2015-11-25 10:43 ` Brantley Coile
2015-11-25 10:53 ` Brantley Coile
2015-11-25 12:59 ` Charles Forsyth
2015-11-25 13:48 ` erik quanstrom
2015-11-25 14:25 ` Brantley Coile
2015-11-25 14:31 ` Brantley Coile
2015-11-25 16:03 ` plannine
2015-11-25 17:13 ` Ryan Gonzalez
2015-11-25 18:41 ` Brantley Coile
2015-11-26 2:04 ` Prof Brucee
2015-11-26 2:43 ` Brantley Coile
2015-11-26 2:57 ` Prof Brucee
2015-11-26 3:48 ` Ryan Gonzalez
2015-11-26 7:27 ` Bakul Shah
2015-11-26 11:22 ` Brantley Coile
2015-11-26 11:37 ` tlaronde
2015-11-26 11:55 ` Charles Forsyth
2015-11-26 11:38 ` Bruce Ellis
2015-11-26 16:31 ` erik quanstrom
2015-11-26 16:42 ` Brantley Coile
2015-11-26 16:50 ` Charles Forsyth
2015-11-26 17:12 ` erik quanstrom
2015-11-26 16:46 ` Alexandru Gheorghe
2015-11-26 17:48 ` Bakul Shah
2015-11-26 18:04 ` Brantley Coile
2015-11-26 23:14 ` Steve Simon
2015-11-26 23:24 ` Charles Forsyth
2015-11-26 23:55 ` Brantley Coile [this message]
2015-11-25 19:19 ` Steffen Nurpmeso
2015-11-23 11:32 ` Charles Forsyth
2015-11-23 11:37 ` Charles Forsyth
2015-11-23 11:50 ` Brantley Coile
2015-11-23 12:05 ` Charles Forsyth
2015-11-23 12:17 ` Brantley Coile
2015-11-23 12:40 ` Charles Forsyth
2015-11-23 12:09 ` Charles Forsyth
2015-11-23 14:30 ` Charles Forsyth
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