Search icon CANCEL
Subscription
0
Cart icon
Your Cart (0 item)
Close icon
You have no products in your basket yet
Arrow left icon
Explore Products
Best Sellers
New Releases
Books
Videos
Audiobooks
Learning Hub
Free Learning
Arrow right icon
Arrow up icon
GO TO TOP
Mastering Assembly Programming

You're reading from   Mastering Assembly Programming From instruction set to kernel module with Intel processor

Arrow left icon
Product type Paperback
Published in Sep 2017
Publisher Packt
ISBN-13 9781787287488
Length 290 pages
Edition 1st Edition
Languages
Arrow right icon
Author (1):
Arrow left icon
Alexey Lyashko Alexey Lyashko
Author Profile Icon Alexey Lyashko
Alexey Lyashko
Arrow right icon
View More author details
Toc

Far pointers

It may be relatively safe to say that far pointers belong to the past when it comes to the application development level; however, it would not be right not to mention them here, as, after all, there are a few useful things we can do with it. Putting it simply, a far pointer combines a segment selector and an offset into the segment. Originating in the era of 16-bit modes of operation, surviving the 32-bit protected mode, far pointers have made it to the long mode, although they are hardly relevant, as, especially in long mode, all memory is considered to be a flat array and we are hardly going to use them.

The instructions used (some are obsolete) for loading a far pointer into the segment register: general-purpose register pairs are as follows:

  • LDS: This loads the selector part of the far pointer into the DS
  • LSS: This loads the selector part of the far pointer...
lock icon The rest of the chapter is locked
Register for a free Packt account to unlock a world of extra content!
A free Packt account unlocks extra newsletters, articles, discounted offers, and much more. Start advancing your knowledge today.
Unlock this book and the full library FREE for 7 days
Get unlimited access to 7000+ expert-authored eBooks and videos courses covering every tech area you can think of
Renews at $19.99/month. Cancel anytime
Banner background image