Yellow Playground

Hello, fellows!

I hope that a linux assembly playground will be very helpful for you.

Make sure you have gef installed in your gdb, along with its suggested libraries, in specific "keystone".

Clone the repo:

git clone https://github.com/ThinerDAS/asm-playground.git
cd asm-playground

Then, type in shell:

gcc main.c -o main

and use gdb to open it:

gdb main

and inside gdb, type:

source play.py
play

Homework:

• Try out normal instructions like mov, add, etc. You will need to become familiar with some debugging commands in gdb, including stepi (si), continue (c), break (b), etc.
• Try out instructions related to stack and rip, like push, pop, jmp, call, ret, leave, etc.
• Try a C function call. Find out the address of printf and call printf("Hello, %dth challenger!\n", 100);. Find the address of malloc, allocate a memory, malloc(0x100);, with assembly and put the memory address to rdi.
• Try a syscall. Do sys_read(0, rsp, 100) to populate the stack, and sys_execve(rsp, 0, 0) to execute your program.
• Reread the programs we have compiled using gcc up to this time, and compile some more programs. Point out the calling convention inside the assembly.