linux-kernel - Re: JIT emulator needs

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Message-Id: <1181320559.2794.4.camel@entropy>
Date:	Fri, 08 Jun 2007 09:35:59 -0700
From:	Nicholas Miell <nmiell@...cast.net>
To:	Alan Cox <alan@...rguk.ukuu.org.uk>
Cc:	Albert Cahalan <acahalan@...il.com>,
	linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: JIT emulator needs

On Fri, 2007-06-08 at 12:10 +0100, Alan Cox wrote:
> > e. mremap() flag to get a read/write mapping of a read/exec one
> > f. mremap() flag to get a read/exec mapping of a read/write one
> > g. mremap() flag to make the 5th arg (new addr) be the upper limit
> 
> This is all mprotect and munmap.

I think he's asking for a way to copy an existing mapping, which does
sound genuinely useful. (i.e. mremap(ptr, size, size, MREMAP_COPY), with
no need to mess with files to get multiple mappings of the same region)

-- 
Nicholas Miell <nmiell@...cast.net>

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