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</o:shapelayout></xml><![endif]--></head><body lang=EN-AU link="#0563C1" vlink="#954F72"><div class=WordSection1><p class=MsoPlainText>> -----Original Message-----</p><p class=MsoPlainText>> From: Oberon [mailto:oberon-bounces@lists.inf.ethz.ch] On Behalf Of</p><p class=MsoPlainText>> Andreas Pirklbauer</p><p class=MsoPlainText>> Sent: Saturday, 4 August 2018 9:42 AM</p><p class=MsoPlainText>> To: ETH Oberon and related systems</p><p class=MsoPlainText>> Subject: [Oberon] NAstrobe for RISC5 on Pepino</p><p class=MsoPlainText>> </p><p class=MsoPlainText>> Apart from client references (where another module imports M),</p><p class=MsoPlainText>> references to a module can also be in the form of type tags</p><p class=MsoPlainText>> (addresses of type descriptors) in dynamic objects of other modules</p><p class=MsoPlainText>> (allocated via the predefined procedure NEW) pointing to descriptors</p><p class=MsoPlainText>> of types declared in the module, or in the form of procedure</p><p class=MsoPlainText>> variables installed in static or dynamic objects of other modules</p><p class=MsoPlainText>> referring to procedures declared in the module.</p><p class=MsoPlainText>> </p><p class=MsoPlainText>> So one has the following types of references :</p><p class=MsoPlainText>> </p><p class=MsoPlainText>> 1. Client reference</p><p class=MsoPlainText>> 2. Type (tag) references</p><p class=MsoPlainText>> 3. Procedure (variable) references</p><p class=MsoPlainText>> </p><p class=MsoPlainText>> FPGA Oberon checks only 1., but not 2. or 3.</p><p class=MsoPlainText>> </p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText>Thank you for the clarification. I would have been concerned if Client references weren’t working properly! <o:p></o:p></p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText>I’ve no doubt that if somebody is determined to find ways to break the system they'll succeed. I suspect I don't need to worry too much about 2 and 3 affecting me but I can’t be sure. <o:p></o:p></p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText>Consequently, I'd be interested to see a simple *minimal* test application for each of the use cases 2 or 3 assuming that:<o:p></o:p></p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText>1. They are not using SYSTEM or any other devious means to bypass system security. <o:p></o:p></p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText>2. It's the sort of programming technique you'd expect to see in a regular Oberon application (as opposed to kernel-level, device-driver programming etc.). <o:p></o:p></p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText>Regards,<o:p></o:p></p><p class=MsoPlainText>Chris<o:p></o:p></p><p class=MsoPlainText><o:p> </o:p></p><p class=MsoPlainText>Chris Burrows<o:p></o:p></p><p class=MsoPlainText>CFB Software<o:p></o:p></p><p class=MsoPlainText>http://www.astrobe.com/RISC5<o:p></o:p></p><p class=MsoPlainText><o:p> </o:p></p></div></body></html>