From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from root by main.gmane.org with local (Exim 3.35 #1 (Debian)) id 1BALIG-0004LC-00 for ; Mon, 05 Apr 2004 06:01:04 +0200 Received: from finn.gmane.org ([80.91.224.251]) by main.gmane.org with esmtp (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Mon, 05 Apr 2004 06:01:04 +0200 Received: from ku4s by finn.gmane.org with local (Gmexim 0.1 (Debian)) id 1AlnuQ-0007hv-00 for ; Mon, 05 Apr 2004 06:01:04 +0200 From: "Kuas (gmane)" Subject: Page Mapping Date: Sun, 04 Apr 2004 22:57:59 -0400 Message-ID: <4070CB37.8070704@users.sourceforge.net> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org Return-Path: To: linux-mm@kvack.org List-ID: Hello, This might be very trivial question for people in this mailing list. I need to know if my understanding is correct. We are doing some experiment with Linux kernel for security. Right now, we are trying to see some behavior in the Linux memory management. I am trying to track and possibly scan (for now) all the pages that's just brought into the memory. I am doing this in i386 arch and Linux kernel 2.4.22. I think it would be good to do it in: mm/memory.c in do_no_page(). At the end of the function, I have references to pte_t and page struct of the fresh new page that's just brought in from disk (not swapped). This is diagram the diagram I'm going to refer: http://www.skynet.ie/~mel/projects/vm/guide/html/understand/node24.html From my understanding from the diagram of Linear Address to Page conversion (please let me know if I'm correct or misunderstood). The struct "pte_t->pte_low" an entry if PTE table, is the base 'physical' address of the page. In this case I can just use it to reference the page. I can't find any other conversion method to get another address. Assuming I have that address, can I just direct reference that address (assuming the address is physical and from kernel mode) or do I have to use some methods to access the page content? How do I know the size of the page that's filled though? I can't see that information from the page struct. Thanks in Advance for comments and information. Kuas -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: aart@kvack.org