using mprotect to write to .text

linux-mips

using mprotect to write to .text

To:	linux-mips@linux-mips.org
Subject:	using mprotect to write to .text
From:	Joe Buehler <aspam@cox.net>
Date:	Mon, 10 Oct 2011 20:02:39 +0000 (UTC)
Sender:	linux-mips-bounce@linux-mips.org
User-agent:	Loom/3.14 (http://gmane.org/)

I intend to use mprotect in a running binary to allow it to modify its .text
section.  The detailed behavior of mprotect for a multithreaded program on SMP
hardware is not documented as far as I can tell.

Can I depend on the LINUX mprotect call to take care of icache flushing,
handling of hazards, etc.?  I am using Octeon CN5650 on 2.6.21.7 and 2.6.27.7 if
it matters.

Joe Buehler

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