Doubt regarding asmlinkage
rohan.puri15 at gmail.com
Thu Sep 8 01:13:45 EDT 2011
On Thu, Sep 8, 2011 at 9:50 AM, Mulyadi Santosa
<mulyadi.santosa at gmail.com>wrote:
> Hi :)
> On Thu, Sep 8, 2011 at 10:40, rohan puri <rohan.puri15 at gmail.com> wrote:
> > Hi Mulyadi,
> > Thanks for the response. I do agree with the issue concerning the no.of
> > registers available are less for 32 bit to that of 64 bit.
> > But even in this case if parameters are more than the no of register for
> > bit, then also before executing int 80h interrupt it stores the
> > in the register and after that system call dispatcher puts them on the
> > kernel stack of that process. So, how the case where more than no of
> > registers are the parameters to the system call is handled.
> Please don't top post :)
> Regarding passing the parameters when it is more than number of
> registers used in x86 32 bit, AFAIK it's using EDX to contain the
> address of user space memory that contains the data, later it will be
> copied to kernel stack IIRC.
> Mulyadi Santosa
> Freelance Linux trainer and consultant
> blog: the-hydra.blogspot.com
> training: mulyaditraining.blogspot.com
Sorry for top posting. :)
Got it now. Thanks.
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