RE: Reg flow of system call

["V.Chandramouli" <chandramv@future.futsoft.com>]

Hi,

"open" is a system call, hence in Linux a software interrupt (0x80) is
triggured and the value of the system call number (check it in asm/unistd.h)
and its parameters are passed in registers. The code for handling this part
is in entry.S in arch/i386/kernel.h file. Here the syscall no is checked and
then "sys_open" is called.

Regards,
Chandramouli.

-----Original Message-----
From: owner-kernelnewbies@nl.linux.org
[mailto:owner-kernelnewbies@nl.linux.org]On Behalf Of SATHISH.J
Sent: Saturday, 25 August 2001 5:57 PM
To: kernelnewbies@nl.linux.org
Subject: Reg flow of system call


Hi,
Someone please help me telling the path from open()(wrapper routine) to
sys_open() in open.c. Please explain me the flow of open syscall from
open() to sys_open().

Thanks in advance,
Warm regs,
sathish


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