here i will present my code write to solve assignments for SLAE32.
i try to not write any html, C, python - except for latest assignment and for foolproofing my encoder one.
this because the course’s goal is to teach some ASM basic, not C or python, and i see this as an interesting extra challenge.

blog posts, if i can call them this way, are just commented assembly. you’re not going to see any image or graph, just comments on top and before ops.
if you just want the asm, you can easily grep -v ^\; *.asm and skip all my ELS comments :)
i choose to tab on function name to save some tab/spaces before ops, unsure how it will render on jekyll, will deal with it. i’m not sure i really like it but i thought it was worth trying to do all statements like this.
plus, i had some minor convention changes during the journey because i felt free to test.

i actually wrote a very small bash script to compile asm

FILE="${1%.*}"
# -w-other because jmp short esp gives warn...
# elf32 and elf_i386 because i'm on a 64bit box, let's force it
/usr/bin/nasm -w-other -f elf32 -o $FILE.o $FILE.asm
/usr/bin/ld -m elf_i386 -o $FILE $FILE.o

the script is automatically runt at file write by using vimrc line

autocmd BufWritePost *.asm silent! !/path/to/compileasm.sh <afile>

reversing and debugging has been done with GEF, a very useful gdb extension.

all the code has been published on this github repo, reachable at https://github.com/gulyslae/SLAE32 license is CC-BY-NC-SA: please don’t make commercial use of my code, attribute my mistake to me, and if you want ping me to say something

of course, the code “works on my VM” pretty well.

stop with all this speaking, time to assemble!

SLAE-1037
This blog post has been created for completing the requirements of the SecurityTube Linux Assembly Expert certification: http://securitytube-training.com/online-courses/securitytube-linux-assembly-expert/