Details
- Platform: x86_64
- ASM flavor: Intel
- Assembler: as (from GNU)
Source code
.section .text # Code section
.global _start # Entry point
_start: # Label (entry point)
call print # Call print function
mov rax, 60 # Syscall number: 60 (= exit)
xor rdi, rdi # Syscall arg 0: 0 (= code)
syscall # Perform syscall
print: # Label (print function)
mov rax, 1 # Syscall number: 1 (= write)
mov rdi, 1 # Syscall arg 0: 1 (= stdout)
lea rsi, [rip+msg] # Syscall arg 1: [rip+msg] (= address)
mov rdx, 12 # Syscall arg 2: 12 (= length)
syscall # Perform syscall
ret # Return to _start
.section .data # Data section
msg: # Label (print message)
.string "Hello world\n" # Output string
Generation
$ as -o main.o main.s --64 --msyntax=intel --mnaked-reg
$ ld -o main main.o
Execution
$ ./main
Hello world
