Function mmap

pub unsafe fn mmap(
    addr: *mut void,
    length: size_t,
    prot: int,
    flags: int,
    fd: int,
    offset: off_t,
) -> Result<*mut void>

Map a file or device into memory.

On this platform this actually wraps the mmap2 system call, with the given offset adjusted to be a page-based rather than byte-based offset.