Adding a dummy system call

[Adam Fowler]

Thank you both these will all be very helpful!

Cheers!
On Apr 4, 2014 11:11 PM, "Augusto Mecking Caringi" <augustocaringi at gmail.com>
wrote:

> On Fri, Apr 4, 2014 at 9:20 PM, Adam Fowler <ajf2177 at columbia.edu> wrote:
>
>> Hi Everyone,
>>  I am trying to learn the linux kernel via the book Linux Kernel
>> Development 3rd edition by Robert Love, and in it he advises to use the
>> macro _syscallX to allow access to user added syscalls not wrapped by glibc
>> functions. In my attempt to add a system call this macro failed me and
>> after a little man page perusal I noticed _syscallX is obselete. Is it
>> considered a better practice to declare the asmlinkage int sys_X(..)
>> declaration myself instead of using this obsolete macro? Or did syscall(2)
>> replace it? And if it was replaced does anyone have a reference they could
>> point me for adding system calls in kernel 3.10 or similar? thank you in
>> advance!
>>
> Hi,
>
>     To call a new/generic syscall in userspace, take a look here:
>
>     http://www.gnu.org/software/libc/manual/html_node/System-Calls.html
>
>     To add a new syscall to a recent kernel, take a look here:
>
>     http://blog.techveda.org/adding-system-calls-linux-kernel-3-5-x/
>
> --
> Augusto Mecking Caringi
>
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