int test(int a)
{
    return a;
}

movl %edi, -20(%rbp)                 ; save function parameter onto stack (unrelated to canary)
        movq __stack_chk_guard(%rip), %rax   ; load magic value into EAX register
        movq %rax, -8(%rbp)                  ; save EAX register onto stack (place the canary)
        movl -20(%rbp), %eax                 ; load function parameter into EAX register for return (unrelated to canary)
        movq -8(%rbp), %rcx                  ; load canary value into RCX register
        movq __stack_chk_guard(%rip), %rdx   ; load magic value into RDX register
        cmpq %rdx, %rcx                      ; compare canary value to expected value
        je .L3                               ; if they are the same, jump to label .L3 (continue)
        call __stack_chk_fail                ; otherwise (stack corruption detected), call the handler
.L3:
        leave