Laboratory 4 (hints)



<h1> Laboratory 4 (hints) </h1>


<h2> Preparation </h2>


Remember when you grep over the source code to focus
on arch/i386 as this is the architecture we are using.

<p>

The main file you are looking for contains the table that
has the system call "entry". The word "entry" is a hint.
<p>
The locations where the system calls are implemented 
can be anywhere in the kernel. 

<p>

Note within the kernel the system call is called
something like "sys_&lt;name&gt;", whereas in user space
it is called just "&lt;name&gt;".  The only thing linking
these is the entry in the table.  The name within the kernel,  "sys_&lt;name&gt;", is defined via a macro.

<p>

This lab involves changes to the file "syscall_table_32.S" and "namei.c".
And the creation of your own user space program.