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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
// main.c
#include <stdio.h>

void  dbg(){}
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Interesting facts about ASCII

Posted 02-03-2012 at 04:59 AM by hydraMax (Bits and Pixels)

Some interesting about ASCII, when it is represented as bytes in a binary system: (taken from Art of Assembly Language):

1) All alphabetic characters in standard ASCII can be converted to lowercase or uppercase simply by toggling the fifth bit (the first bit is bit zero). E.g.:

E = 01000101
e = 01100101
2) you can obtain the numeric equivalent of any of the numeric characters by subtracting 0x30 from the ASCII value.

3) Bits five...
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Views 1840 Comments 0 hydraMax is offline

film photography

Posted 02-02-2012 at 01:32 PM by Web31337 (In The Middle Of Nowhere [edK's blog])

This year I'm moving back to film photography and will learn processing myself, since no real lab in our forsaken town.
Anyway, time to get my hands busy with some art ;D
Enough writing shit-code!
Posted in etc
Views 4374 Comments 1 Web31337 is offline

incremental backup on tape drive

Posted 02-02-2012 at 07:24 AM by nayan123

Dear Sir,

I want to take backup on LTO4 for Linux partition (mounted as user home ). How can I take incremental backup . I have 8 partition belongs to 8 home (including numbers of home on each partition ) in my NIS server and eight LTO4 tape drive. How can I take incremental data backup? Is there any GUI third party software there or any kind of script have to be run. Please help in this regards. I am totally stuck on it.

LQ Newbie
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Views 377 Comments 0 nayan123 is offline

Really tiny executable

Posted 02-01-2012 at 03:23 PM by hydraMax (Bits and Pixels)

Thought this was neat:

A Whirlwind Tutorial on Creating Really Teensy ELF Executables for Linux

The author uses assembly and ELF-hacking to make a binary as small as possible while still doing something useful (returning a value). Goes step-by-step through each hack.
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Views 3889 Comments 1 hydraMax is offline


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