Adding custom system calls

Adding custom system calls

[arun kumar]

How do i add a Custom system call to my Linux Kernel.
I want to know what files to modify and where to make the entries.

Arch : x86 64bit
Kernel: 3.12.14
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Adding custom system calls

[Greg KH]

On Thu, Mar 20, 2014 at 10:55:42PM +0530, arun kumar wrote:
> How do i add a Custom system call to my Linux Kernel.
> I want to know what files to modify and where to make the entries.

That really sounds like a homework question...

Why do you want to do this, and what have you tried to do that has
failed?

Fwd: Adding custom system calls

[arun kumar]

yeah it does seems like a homework question..

I remember doing it on KernelVersion: 2.6 by modifying some files including
unistd.h writing a wrapper for it and writing the code for it. This
included some tweaking inside the /arch subtree of the kernel.
my intentions are entirely academic.

Currently working on kernelVer: 3.12.14
I am somewhat struggling to comprehend the changes (steep learning curve),
if you could guide me on what files to look for, i am sure i can find my
way from there.

and Thanks Greg.
--big fan :)



On Thu, Mar 20, 2014 at 11:11 PM, Greg KH <greg@kroah.com> wrote:

> On Thu, Mar 20, 2014 at 10:55:42PM +0530, arun kumar wrote:
> > How do i add a Custom system call to my Linux Kernel.
> > I want to know what files to modify and where to make the entries.
>
> That really sounds like a homework question...
>
> Why do you want to do this, and what have you tried to do that has
> failed?
>
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Fwd: Adding custom system calls

[Greg KH]

On Fri, Mar 21, 2014 at 12:50:27AM +0530, arun kumar wrote:
> 
> yeah it does seems like a homework question..
> 
> I remember doing it on KernelVersion: 2.6 by modifying some files including
> unistd.h writing a wrapper for it and writing the code for it. This included
> some tweaking inside the /arch subtree of the kernel.
> my intentions are entirely academic.
> 
> Currently working on kernelVer: 3.12.14
> I am somewhat struggling to comprehend the changes (steep learning curve), if
> you could guide me on what files to look for, i am sure i can find my way from
> there.

There's loads of "how to add a syscall to Linux" tutorials out there,
what have you tried and what errors have you gotten when following them?

greg k-h

Adding custom system calls

[Augusto Mecking Caringi]

On Thu, Mar 20, 2014 at 2:25 PM, arun kumar <arunkr.linux@gmail.com> wrote:

> How do i add a Custom system call to my Linux Kernel.
> I want to know what files to modify and where to make the entries.
>
> Arch : x86 64bit
> Kernel: 3.12.14
>

http://lmgtfy.com/?q=how+to+add+a+syscall+to+Linux+kernel+3.x

:)

-- 
Augusto Mecking Caringi
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