Part 29 - x64 Assembly [Part 3]

For a complete table of contents of all the lessons please click below as it will give you a brief of each lesson in addition to the topics it will cover. https://github.com/mytechnotalent/Reverse-Engineering-Tutorial

Today we continue our tutorial with a simple subtract example. Let’s examine the source code:

Let’s compile and run the debugger:

Let’s run and disassemble:

As we can see very we load 16 or 0x10 hex into EAX and then subtract 5 from it in the next instruction.

We step twice and then look at the resulting value in RAX.

As we can see the result is 0xb hex or 11 decimal as expected. It is important that you try these simple examples to get a grasp of what happens when we start to debug C++ code in future tutorials.