On Thu, Sep 8, 2011 at 9:50 AM, Mulyadi Santosa <[email protected]>wrote:
> Hi :) > > On Thu, Sep 8, 2011 at 10:40, rohan puri <[email protected]> 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 > 32 > > bit, then also before executing int 80h interrupt it stores the > parameters > > 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. > > -- > regards, > > Mulyadi Santosa > Freelance Linux trainer and consultant > > blog: the-hydra.blogspot.com > training: mulyaditraining.blogspot.com > Sorry for top posting. :) Got it now. Thanks. Regards, Rohan.
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