terminal

EdmundC

Oct 6th, 2024 (edited)

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ASM (NASM) 2.27 KB | None | 0 0

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section .data
prompt_msg db "Enter command: ", 0
ld_bash db "/ld bash", 0
ld_zsh db "/ld zsh", 0
ld_crosh db "/ld crosh", 0
ld_py db "/ld ", 0
bash_shell db "/bin/bash", 0
zsh_shell db "/bin/zsh", 0
crosh_shell db "/path/to/crosh", 0
python_cmd db "/usr/bin/python3", 0
section .bss
command resb 256
filename resb 256
section .text
global _start
_start:
; Display prompt
mov eax, 4
mov ebx, 1
mov ecx, prompt_msg
mov edx, 13
int 0x80
; Read user input
mov eax, 3
mov ebx, 0
mov ecx, command
mov edx, 256
int 0x80
; Check if command is /ld bash
mov esi, command
mov edi, ld_bash
call check_command
jz load_bash
; Check if command is /ld zsh
mov esi, command
mov edi, ld_zsh
call check_command
jz load_zsh
; Check if command is /ld crosh
mov esi, command
mov edi, ld_crosh
call check_command
jz load_crosh
; Check if command starts with /ld filename.py
mov esi, command
mov edi, ld_py
call check_command
jz decompile_python
; Exit program if no matching command
mov eax, 1
xor ebx, ebx
int 0x80
load_bash:
; Execute bash shell
mov eax, 11
mov ebx, bash_shell
xor ecx, ecx
xor edx, edx
int 0x80
load_zsh:
; Execute zsh shell
mov eax, 11
mov ebx, zsh_shell
xor ecx, ecx
xor edx, edx
int 0x80
load_crosh:
; Execute crosh shell
mov eax, 11
mov ebx, crosh_shell
xor ecx, ecx
xor edx, edx
int 0x80
decompile_python:
; Parse filename from command
mov esi, command
add esi, 4
mov edi, filename
call copy_filename
; Decompile Python file (simulated)
; Use python command to decompile or run
; Command: python3 -m py_compile filename.py
mov eax, 11
mov ebx, python_cmd
mov ecx, filename
xor edx, edx
int 0x80
check_command:
; Compare esi (input) with edi (expected)
mov ecx, 256 ; max length to compare
repe cmpsb
sete al
ret
copy_filename:
; Copy filename from input to filename buffer
mov ecx, 256
.copy_loop:
lodsb
stosb
loop .copy_loop
ret

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