LinuxQuestions.org
LinuxAnswers - the LQ Linux tutorial section.
Go Back   LinuxQuestions.org > Blogs
User Name
Password

Notices


Old

ASM: mixing assembler and C++

Posted 02-05-2012 at 12:05 PM by rainbowsally
Updated 08-06-2014 at 10:30 AM by rainbowsally

This is for intel 32 bit assembler. For 64-bits the calling convention is a bit different. See previous entries (specifically asm 64 bits) if you need a leg-up to break the 64 bit barrier.

Features:
  • Asm functions that can call class functions (using an object pointer) through jump vectors written in C.
  • Usage of extern "C" declarations to un-mangle names we need to keep simple for asm coding.

[If you really want to get down, you can use the mangled names as...
Member
Posted in Uncategorized
Views 1115 Comments 0 rainbowsally is offline
Old

Slackware-13.37-Hacks-Hardening Tips

Posted 02-04-2012 at 09:17 PM by arniekat

These suggestions are based on advice from the SlackWiki Basic Security Fixes, The Center For Internet Security Slackware Benchmarks and on the General Hardening Tips for Red Hat Enterprise Linux. I condensed and categorized as many of the suggestions as I could glean, however, it is your choice as to how many of them apply in your case.

PHYSICAL SECURITY

Create a BIOS Password to keep others from changing your BIOS settings. After you have installed Slackware, you...
LQ Newbie
Posted in Uncategorized
Views 2529 Comments 0 arniekat is offline
Old

Slackware-13.37-Hacks-Vim Tutorial

Posted 02-03-2012 at 07:46 PM by arniekat

SOURCE - The Vimbook Tutorial Version 5.7 and Vim Manpages and vim.org

Elvis is a clone of the ex/vi text editor.
/usr/bin/vi is a symlink to elvis
Elvis is part of the package elvis-2.2_0

This tutorial, however will use Vim.
Vim is part of the package vim-7.3.154
Main Website: http://www.vim.org/
NOTE - vipw is an editor for the file /etc/passwd
vigr is an editor for the file /etc/group
visudo is an editor...
LQ Newbie
Posted in Uncategorized
Views 996 Comments 0 arniekat is offline
Old

ASM: Intercepting (and using) Errors (like segfaults) in asm (aka SEH)

Posted 02-03-2012 at 04:10 PM by rainbowsally

This is for i86 and x86_64 types but with a bit of poking around you can probably find a similar way to do this with other CPUs.

Note: This asm requires 'sigaction'. (See the test code. And bear in mind that this is not an attempt to create a full-blown system of signal handlers. Check the libc docs for 'sigaction' for ideas on how you can use something like this for a seed for a more extensive application.)

There used to be a lot of cool little programs for the...
Member
Posted in Uncategorized
Views 1163 Comments 0 rainbowsally is offline
Old

ASM: 64 bit intel asm in linux

Posted 02-03-2012 at 04:01 PM by rainbowsally

If you're used to 32 bit asm in gcc, the 64 bit asm might throw you for a loop initially. That's because part of the stack is passed around in registers.

Let's compile a bit of test code and see what's going on.

If you're using our makefile-creator put this in a subdirectory named "src" or use whatever method you prefer if not.

file: src/main.c
Code:
// main.c
#include <stdio.h>

void  dbg(){}
...
Member
Posted in Uncategorized
Views 1244 Comments 0 rainbowsally is offline

  



All times are GMT -5. The time now is 08:21 PM.

Main Menu
Advertisement
Advertisement
My LQ
Write for LQ
LinuxQuestions.org is looking for people interested in writing Editorials, Articles, Reviews, and more. If you'd like to contribute content, let us know.
Main Menu
Syndicate
RSS1  Latest Threads
RSS1  LQ News
Twitter: @linuxquestions
Facebook: linuxquestions Google+: linuxquestions
Open Source Consulting | Domain Registration