Re: max agruments in system_calls

[linux-os]

On Wed, 17 Nov 2004, Sharma Sushant wrote:

> Hi All
> Can some one tell me, if I want to implement a system call with more than 6 
> arguments in it, how should I do it? I am using kernel 2.6.3.
> I know I can use struct and stuff arguments inside it, but I want to use more
  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^__________ yes 
> than 6 different arguments.

Huh? You KNOW that you don't have more than 7 registers available
on ix86 so you KNOW that you either need a pointer to a struct (one 
parameter) or it won't work.

FYI:
	eax = function code
	ebx = first parameter
	ecx = second parameter
	edx = third parameter
	esi = fourth parameter
	edi = fifth parameter
	ebp = sixth parameter

You need esp for the call and you need eip for the code. There
are no other registers except segment registers.

> Thanks
> -Sushant



Cheers,
Dick Johnson
Penguin : Linux version 2.6.9 on an i686 machine (5537.79 BogoMips).
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