Macro emerald_kernel_user_link::call_syscall

macro_rules! call_syscall {
    ($syscall_num:expr $(,)?) => { ... };
    ($syscall_num:expr, $($args:expr),* $(,)?) => { ... };
    (@step $syscall_num: expr; {$($generated:tt)*}; {}) => { ... };
    (@step $syscall_num: expr; {$($generated:tt)*}; {$one:expr}) => { ... };
    (@step $syscall_num: expr; {$($generated:tt)*}; {$one:expr, $two:expr}) => { ... };
    (@step $syscall_num: expr; {$($generated:tt)*}; {$one:expr, $two:expr, $three:expr}) => { ... };
    (@step $syscall_num: expr; {$($generated:tt)*}; {$one:expr, $two:expr, $three:expr, $four:expr}) => { ... };
    (@step $syscall_num: expr; {$($generated:tt)*}; {$one:expr, $two:expr, $three:expr, $four:expr, $five:expr}) => { ... };
    (@step $syscall_num: expr; {$($generated:tt)*}; {$one:expr, $two:expr, $three:expr, $four:expr, $five:expr, $six:expr}) => { ... };
    (@step $syscall_num: expr; {$($generated:tt)*}; {$one:expr, $two:expr, $three:expr, $four:expr, $five:expr, $six:expr, $seven:expr}) => { ... };
    (@step $syscall_num: expr; {$($generated:tt)*}; {$($args:expr),*}) => { ... };
    (@final $syscall_num: expr, {$($generated:tt)*}) => { ... };
}

Creates a syscall, the first argument is the syscall number (in RAX), then the arguments are as follows RCX, RDX, RSI, RDI, R8, R9, R10 (7 arguments max)