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From:	tim DOT nicholson AT skyforcekent DOT com
Newsgroups:	comp.os.msdos.djgpp
Subject:	protecting program memory
Date:	23 Mar 2007 04:16:50 -0700
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To:	djgpp AT delorie DOT com
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Reply-To:	djgpp AT delorie DOT com

Is there an easy way to protect the memory used to store the program
op codes from a rogue memory write from within the application? I have
a large (100,000+ line) DJGPP application which sometimes crashes with
SIGILL - It would seem the program is cannibalizing itself! In order
to find how this is happening, I would like to protect the entire
block of memory that contains the application code so that an
exception occurs at the point the corruption occurs rather than the
point that the corrupted code is executed.

I guest I need to make the memory block read only, but I am not sure
how to do that.

Thanks

Tim

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