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[entry: main] // Sums 5 + 4 + 3 + 2 + 1 = 15 with a countdown loop, returns it as the status. const SYS_EXIT = 60 proc main { rbx = 0 // running total rcx = 5 // counter loop: rbx += rcx rcx -= 1 if rcx != 0 goto loop rdi = rbx rax = SYS_EXIT syscall }