Archive for 2009

SMC (Self modifing code) under Linux with GAS

Tuesday, April 14th, 2009

With the Gnu Assembler (also known as GAS) it is quite simple to write self modifying assembly code. The only issue is that you can't make the text section directly self modifiable you have to create a new section: .section .text .globl _start _start: jmp modifing # directly jump in the smc ...

Free lifting for a space elevator

Wednesday, January 7th, 2009

As I was reading an article about a new kind of lifter for the space elevator, I started thinking about the energy you would need to bring anything to the geostationary orbit. I also remember thinking that over the geostationary orbit, moving still upward gives you energy. If you imagine ...