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Date: Sun, 27 Nov 2005 23:22:46 +0100
From: Samuel Thibault <samuel DOT thibault AT ens-lyon DOT org>
To: cygwin AT cygwin DOT com
Subject: Re: mmap() on 64K aligned address fails
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René Berber, le Sun 27 Nov 2005 16:17:45 -0600, a écrit :
> Corinna Vinschen wrote:
> [snip]
> >>mmap(0x470000, 4096, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_FIXED, fd, 0L)
> >>somehow an invalid invocation.
> > 
> > 
> > I didn't inspect the testcase all too closely since it's annoyingly long
> > for such a simple test.  But what exactly do you expect when trying to
> > mmap an arbitrary memory address in the virtual address space which you
> > know nothing about?
> 
> It's not an arbitrary memory address, the 0x470000 is the result of aligning a
> pagesize space into 17xpagesize malloced memory.

Memmapping to malloced memory could very well be forbidden. Why would
one want to do this?

Regards,
Samul

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