Re: Memory Mapping examples/documentation?
Re: Memory Mapping examples/documentation?
- Subject: Re: Memory Mapping examples/documentation?
- From: Greg <email@hidden>
- Date: Mon, 3 Mar 2008 14:06:08 -0500
On Mar 3, 2008, at 11:23 AM, mm w wrote:
Hi Greg,
In the doc there is a small chapter regarding Memory wiring called:
Memory Mapping and Block Copying, I guess it's exactly what you asked,
as Michael said most people think that not using IOKit is more
efficient, for the most of cases, it's really wrong, as you have may
be noticed IOKit is not a full C++, it's based on Embedded C++, Iokit
provides many facilities and kern controls,
The only reason that I don't want to make an IOKit kext is that I feel
it would over-complicate my code. I don't have much time to learn all
the paradigms of creating a driver and then a userclient when all I
need is one function to start the kernel extension (kextname_start)
and one function to stop it (kextname_stop).
and sure it depends on what you want to accomplish, if it's to learn
or implement something that doesn't exist, your are on the way, if
it's for implementing something that already exists not sure :), and
sure the xnu source is always your best doc: osfmk/vm/vm_user.c
Are the functions in vm_user.c the only functions available to do what
I want? And are you saying that no actual documentation on how to use
those functions to do memory mapping exists?
Because if that's the case then converting my extension to IOKit stuff
might be easier than wading through kernel code.
Thanks,
- Greg
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