Just a few pointers for everyone to look further:
a. kernel space is (for Intel x86) Ring0, and userspace is Ring3,
and so when u make transition between these two - u are subjected to
HARDWARE control on how the stack space can be used. So Intel manual
(System Programming 3a specifically) is
On 16-01-08 13:02, Mulyadi Santosa wrote:
Arg! I confused you...sorry! yeah after 2nd thought, it should be
on stack, because registers are clobbered during context switch
/me takes this opportunity to confuse the discussion further...
No they aren't. The stack _is_ switched though.
On Wednesday 16 January 2008, srinivas bakki wrote:
> > No they aren't. The stack _is_ switched though.
>
> And how do the arguments reach the kernel stack from the user space if they
> were supposed to be fetched from the stack ?
>
>
The arguments come from userspace in registers. The exception
>
> No they aren't. The stack _is_ switched though.
And how do the arguments reach the kernel stack from the user space if they
were supposed to be fetched from the stack ?
Srinivas
hi...
On Jan 16, 2008 6:56 PM, sahlot arvind <[EMAIL PROTECTED]> wrote:
> Thanks.
> @ Mulyadi
>
> >don't expect arguments on stack.
>
>
> http://kernelnewbies.org/FAQ/asmlinkage
> Just a correction - the link above says "dont expect args in registers but
> only on stack".
Arg! I confused you.
Thanks.
@ Mulyadi
>don't expect arguments on stack.
http://kernelnewbies.org/FAQ/asmlinkage
Just a correction - the link above says "dont expect args in registers but
only on stack".
Cheers!
On 1/16/08, Mahaveer Darade <[EMAIL PROTECTED]> wrote:
>
> Hi
>
> please refer this link
> http://kernel
Hi
please refer this link
http://kernelnewbies.org/FAQ/asmlinkage
On Jan 16, 2008 5:05 PM, Mulyadi Santosa <[EMAIL PROTECTED]> wrote:
> Hi
>
> On Jan 16, 2008 6:27 PM, sahlot arvind <[EMAIL PROTECTED]> wrote:
> > I am seeing lot of funtions prefixed with "asmlinkage".
> > Shall I assume that an
Hi
On Jan 16, 2008 6:27 PM, sahlot arvind <[EMAIL PROTECTED]> wrote:
> I am seeing lot of funtions prefixed with "asmlinkage".
> Shall I assume that any defined function prefixed with "asmlinkage" is
> System Call?
>
> BTW what is "asmlinkage"?
don't expect arguments on stack.
regards,
Mulyadi.
I am seeing lot of funtions prefixed with "asmlinkage".
Shall I assume that any defined function prefixed with "asmlinkage" is
System Call?
BTW what is "asmlinkage"?
Thanks
- A.
