In x86-64 System V (Linux) ABI, the first six integer arguments go in which registers, in order?

• 1rax, rbx, rcx, rdx, rsi, rdi
• 2rdi, rsi, rdx, rcx, r8, r9
• 3r8, r9, r10, r11, r12, r13
• 4rsp, rbp, rax, rbx, rcx, rdx