Re: syscall __NR_mmap2

["Randy.Dunlap" <rddunlap@osdl.org>]

On Tue, 8 Jul 2003 10:40:15 -0400 (EDT) "Richard B. Johnson" <root@chaos.analogic.com> wrote:

| On Tue, 8 Jul 2003, Jamie Lokier wrote:
| 
| > Richard B. Johnson wrote:
| > > > The offset argument to mmap2 is divided by PAGE_SIZE.
| > > > That is the whole point of mmap2 :)
| > >
| > > Okay. Do you know where that's documented? Nothing in linux/Documentation,
| > > and nothing in any headers. Do you have to read the code to find out?
| > >
| > > So, the address is now the offset in PAGES, not bytes. Seems logical,
| > > but there is no clue in any documentation.
| >
| > I found this great command which really helps.  Only 1337 kernel
| > gnurus know about it, now u can be 1 2 :)
| >
| > $ man mmap2
| > [...]
| >        The  function mmap2 operates in exactly the same way as mmap(2), except
| >        that the final argument specifies the offset into the file in units  of
| >        the  system  page  size  (instead of bytes).
| >
| > -- Jamie
| >
| 
| Yeah? So the Linux kernel now requires a specific vendor distribution?
| Since when?
| 
| So, to get the proper documentation of the Linux Kernel, I now
| need to purchase a vendor's distribution??? I think not. I think
| the sys-calls need to be documented and I think that I have established
| proof of that supposition.

I can read that mmap2 man page by downloading the latest tarball
from http://www.kernel.org/pub/linux/docs/manpages/ ,
regardless of my distro.

And if what you want/need isn't there, aeb accepts contributions
to it as well.

--
~Randy
| http://developer.osdl.org/rddunlap/ | http://www.xenotime.net/linux/ |