### Dumb assembly test program that already taught me something
### interesting about AMD64: it has stack alignment constraints like
### ARM.  It’ll still segfault if you run it without a command-line
### argument; that’s not a bug.
        .intel_syntax noprefix
        .globl main
        ## This push rax is to align the stack so printf doesn’t
        ## segfault in movaps with a source address of rsp + 0x50.
main:   push rax
        mov rdi, [rsi + 8]      # argv[1]
        call atoi
        lea rdi, [rip + formatstr] # AMD’s shitty PC-relative syntax
        mov rsi, rax            # return value of atoi
        call printf             # not how GCC does it but hopefully OK
        pop rax
        xor eax, eax
        ret
formatstr:
        .asciz "(%d)\n"