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Real quick here and I'll follow up tomorrow. I don't get SIGSEGV in my application ever. I get an error back from mmap saying it cannot allocate memory when i'm simply trying to open a small file! The original events ere posted up in that first part of the strace - which is unmodified original behavior. Things did not start happening UNTIL the MEM_TOP_DOWN change. My code does not do ANYTHING out of the ordinary that it wasn't doing before and working completely fine with. On Tue, Jan 09, 2007 at 12:56:43PM +0100, Corinna Vinschen wrote: > > Yet the latter works for me, whereas the former results in mmap() > > failures for files smaller than the page size. > > The latter works for you because it's wrong. Since it uses 64K, mmap > thinks it doesn't have to add filler pages. So adding the filler pages > can't go wrong. So you can access your file, but you get the SEGV > exaclty after the last 4K page of the file, not at the end of the > expected 64K page. > > > Corinna -- Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple Problem reports: http://cygwin.com/problems.html Documentation: http://cygwin.com/docs.html FAQ: http://cygwin.com/faq/
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