.global _start, syscall5


_start: 
    /* Load argc -> rdi, argv[0] -> rsi */
    xor %rbp, %rbp
    pop %rdi
    mov %rsp, %rsi

    and $0xFFFFFFFFFFFFFFF0, %rsp
    
    call main

    /* Exit with ret val of main */
    mov %rax, %rdi
    mov $0x3C, %rax
    syscall

syscall5:
    mov    %rdi, %rax /* %rax (syscall number)  = func param 1 (%rdi)    */
    mov    %rsi, %rdi /* %rdi (syscall param 1) = func param 2 (%rsi)    */
    mov    %rdx, %rsi /* %rsi (syscall param 2) = func param 3 (%rdx)    */
    mov    %rcx, %rdx /* %rdx (syscall param 3) = func param 4 (%rcx)    */
    mov    %r8,  %r10 /* %r10 (syscall param 4) = func param 5 (%r8)     */
    mov    %r9,  %r8  /* %r8  (syscall param 5) = func param 6 (%r9)     */
    syscall           /* Enter a syscall (return value in %rax)          */
    ret               /* Return value is already in %rax, we can return. */
    
.section .note.GNU-stack,"",@progbits