[Simh] OpenBSD on Simh VAX 3.8-1 - Segmentation fault

[Gregg Levine]

Hello!
Gary which release  of Slackware Linux was this? I've found that SIMH
properly builds on all releases from 7.2 (Which was only released as a
Snap Shot Disk from the time of the first shows) all the way the 14.1.
I only needed to figure out how to update the LibCap library so that
networking would work properly once that arrived not too long ago. As
an aside I moved away from trying to build it here on this laptop
running 14.2 64bit, because networking requires a fixed connection,
not WiFi.
-----
Gregg C Levine gregg.drwho8 at gmail.com
"This signature fought the Time Wars, time and again."


On Wed, Nov 8, 2017 at 11:11 AM, Gary Lee Phillips <tivo.overo at gmail.com> wrote:
> Thanks for the very clear answer, Mark.
>
> I followed your instructions and the 4.0-0 beta built in minutes. Last time
> I tried to build Simh myself, it took several frustrating days of patching
> the makefile and changing references. That was on Slackware Linux and
> several versions back of both the environment and Simh. So thanks ever so
> much to the developers who have continued to enhance and tune this package.
> It is brilliantly done.
>
> Now the even better news. The vax3900/vax module in 4.0-0 beta does not have
> the segmentation fault I encountered with 3.8-1. OpenBSD 5.7 is able to ftp
> and sftp transfer in and out without any complaints. So thank you again to
> whoever it was that found and fixed that problem.
>
> --Gary
>
>
>
> On Wed, Nov 8, 2017 at 1:50 AM, Mark Pizzolato <Mark at infocomm.com> wrote:
>>
>> Hi Gary,
>>
>> On Tuesday, November 7, 2017 at 5:29 AM, Gary Lee Phillips wrote:
>> > I am running VAX 3.8-1 on a 64-bit Linux system. It performs well
>> > with OpenVMS as the operating system. But when I try to run it
>> > with OpenBSD 5.7 there are issues.
>> >
>> > The base system installs and boots correctly. But in order to bring
>> > in tools such as language compilers or editors, it is necessary to
>> > use ftp or sftp. I cannot get these to transfer anything because the
>> > moment a transfer starts, no matter which mode or direction or
>> > whether the transfer is initiated from within OpenBSD or from the
>> > outside, an immediate segmentation fault occurs. This appears to
>> > be within the SimH code itself, and not on OpenBSD.
>>
>> That would certainly seem to be the case.  Simulator crashes
>> definitely should be fixed.  3.8-1 was released some 8 years ago,
>> and 3.9 was some 6 years ago.  Both are way behind the current
>> code base located at https://github.com/simh/simh/ downloadable
>> as https://github.com/simh/simh/archive/master.zip
>>
>> > The same SimH VAX environment running OpenVMS 7.3 can
>> > perform transfers over ethernet without any apparent issues.
>>
>> This is a useful data point.
>>
>> > I have tried running SimH in supervisor mode or in user mode,
>> > same results. Also same results whether the transfer is initiated
>> > by root or by a normal user account.
>>
>> I wouldn't expect you to be able to run the simulator as non-root
>> and have Ethernet functionality...
>>
>> > The ethernet connection itself seems to be working. Telnet
>> > connections function normally, and ftp or sftp will pass directory
>> > information and accept commands, but file transfers fail.
>> >
>> > I guess I could try another version of OpenBSD. Upgrading SimH
>> > is also possible but a bit more daunting since 3.8 is what is offered
>> > as current on my Linux distro. (Linux Mint 18 "Sarah" 64 bit generic
>> > 4.4.0-97)
>>
>> It really isn't particularly daunting:
>>
>> First, you'll need the following:
>>
>>         $ sudo apt install libpcap-dev
>> Then:
>>         $ wget https://github.com/simh/simh/archive/master.zip
>>         $ unzip master.zip
>>         $ cd simh-master
>>         $ make vax
>>         $# Start the newly built simulator:
>>         $ BIN/vax
>>
>>
>> If you see any sort of segmentation fault, there is a problem that needs
>> fixing, and I'll be glad to address it.   If you have a problem please
>> create
>> an issue at https://github.com/simh/simh/issues
>>
>> - Mark
>
>
>
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