my xchg rax,rax getting started guide (https://www.xorpd.net/pages/xchg_rax/snip_00.html)

xchgraxrax_README.md

1. Install gdb
2. Install GDB PEDA
3. Install nasm
4. Create a makefile:

   %: %.asm
     nasm -f elf64 $< && ld -s -o $@ $@.o
   
   all: $(patsubst %.asm,%,$(wildcard *.asm))
   
   clean: $(patsubst %.asm,%,$(wildcard *.asm))
     rm $^
     rm *.o

5. Have a tab with https://www.felixcloutier.com/x86/ handy.
6. Create a skeleton asm file (e.g. 0x00.asm) and write some assembly:

   section .text
   global _start
   _start:
   ; your asm code here

7. make && gdb ./0x00
8. starti to break at first instruction in executable, si to step instruction. Update registers with set (e.g. set $rax=3). Loop 6.