From: Eli Zaretskii Newsgroups: comp.os.msdos.djgpp Subject: Re: HELP! : Debugging a c/asm mixed programs Date: Sat, 08 Apr 2000 12:11:19 +0200 Organization: NetVision Israel Lines: 18 Message-ID: <38EF05C7.1529F0D0@is.elta.co.il> References: <8ckpmt$bln$1 AT nets3 DOT rz DOT RWTH-Aachen DOT DE> NNTP-Posting-Host: ras1-p97.rvt.netvision.net.il Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit X-Trace: news.netvision.net.il 955188598 27828 62.0.172.99 (8 Apr 2000 10:09:58 GMT) X-Complaints-To: abuse AT netvision DOT net DOT il NNTP-Posting-Date: 8 Apr 2000 10:09:58 GMT X-Mailer: Mozilla 4.7 [en] (Win98; I) X-Accept-Language: en,ru,hebrew To: djgpp AT delorie DOT com DJ-Gateway: from newsgroup comp.os.msdos.djgpp Reply-To: djgpp AT delorie DOT com Hans-Bernhard Broeker wrote: > > mov [dosmem_segment],ax > > it'll try to display what currently is found at address > [dosmen_segment]. Or something like that. I don't remember all the > details offhand without having a system at hand to test them on... > > *If* the current instruction is using a segment override prefix, which > it doesn't understand, FSDB will look in the wrong place, and the > offset may well be out of bounds of the datasegment it assumes. And > bang, it crashes. Are you saying that FSDB doesn't grok segment overrides? I don't think that's true. In any case, I don't think FSDB would crash even if it does try to access a bad address. I'd need to see a specific test case.