[haiku-development] Re: undertanding syscall
- From: "Axel Dörfler" <axeld@xxxxxxxxxxxxxxxx>
- To: haiku-development@xxxxxxxxxxxxx
- Date: Mon, 01 Dec 2008 11:50:10 +0100 CET
romain.haiku@xxxxxxxxxxx wrote:
> Btw why does the code in the kernel is prefixed "_user", and the code
> in
> user is prefixed "_kernel" ?
It's "_user" and "_kern". This has been done to be able to share lib
code between the kernel and userland for POSIX functions like open(),
stat(), ... - they always call _kern_*() functions which resolve to a
syscall from userland (to call the kernel), and a direct call in the
kernel itself, see for example the _kern_*() functions in src/system/
kernel/fs/vfs.cpp.
The "_" is because it's in the private system namespace.
Bye,
Axel.
Other related posts:
