The OpenNET Project / Index page

[ новости /+++ | форум | wiki | теги | ]

Поиск:  Каталог документации

Next Previous Contents

2. Syntax used

2.1 Function Syntax

When speaking about a function, we write:

"function_name  [ file location . extension ]"

For example:

"schedule [kernel/sched.c]" 

tells us that we talk about


function retrievable from file

[ kernel/sched.c ]

Note: We also assume /usr/src/linux as the starting directory.

2.2 Indentation

Indentation in source code is 3 blank characters.

2.3 InterCallings Analysis


We use the"InterCallings Analysis "(ICA) to see (in an indented fashion) how kernel functions call each other.

For example, the sleep_on command is described in ICA below:

|init_waitqueue_entry      --
|__add_wait_queue            |   enqueuing request  
   |list_add                 |
      |__list_add          -- 
   |schedule              ---     waiting for request to be executed
      |__remove_wait_queue --   
      |list_del              |   dequeuing request
         |__list_del       -- 
                          sleep_on ICA

The indented ICA is followed by functions' locations:

Note: We don't specify anymore file location, if specified just before.


In an ICA a line like looks like the following

 function1 -> function2

means that < function1 > is a generic pointer to another function. In this case < function1 > points to < function2 >.

When we write:


it means that < function > is not a real function. It is a label (typically assembler label).

In many sections we may report a ''C'' code or a ''pseudo-code''. In real source files, you could use ''assembler'' or ''not structured'' code. This difference is for learning purposes.

PROs of using ICA

The advantages of using ICA (InterCallings Analysis) are many:

CONTROs of using ICA

As all theoretical models, we simplify reality avoiding many details, such as real source code and special conditions.

Next Previous Contents

Inferno Solutions
Hosting by

Закладки на сайте
Проследить за страницей
Created 1996-2021 by Maxim Chirkov
Добавить, Поддержать, Вебмастеру