format ELF64

section '.text' executable

extrn 'putchar' as __putchar
putchar = PLT __putchar

public main

main:
    ; create stack frame
    push rbp
    mov  rbp, rsp
    sub  rsp, 8         ; space for locals: a (4 bytes), b (4 bytes)

    ; t0 = LOAD_CONST 34
    mov  dword [rbp-4], 34      ; STORE "a", t0

    ; t1 = LOAD_CONST 35
    mov  dword [rbp-8], 35      ; STORE "b", t1

    ; t2 = LOAD "a"
    mov  eax, [rbp-4]

    ; t3 = LOAD "b"
    mov  ecx, [rbp-8]

    ; t4 = ADD t2, t3
    add  eax, ecx               ; eax = t4

    ; PARAM t4  → first arg in EDI
    mov  edi, eax

    ; t5 = CALL putchar
    call putchar

    ; function return (SysV: rax contains return value from putchar)
    leave
    ret