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format ELF64 executable 3
SYS_exit = 60
SYS_write = 1
STDOUT = 1
macro mov64 dest, src {
mov rax, src
mov dest, rax
}
macro def64 name, value {
name:
dq value
}
segment readable executable
entry _start
; rdi = the number
print_u64:
mov rcx, rsp
mov rax, rdi
mov rbx, 10
.L:
xor rdx, rdx
div rbx
add dl, '0'
dec rcx
mov [rcx],dl
cmp rax, 0
jnz .L
mov rax, SYS_write
mov rdi, STDOUT
mov rsi, rcx
mov rdx, rsp
sub rdx, rcx
syscall
ret
_start:
call main
mov rax, SYS_exit
xor rdi,rdi
syscall
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