Function load_uefi

arch/src/riscv64/uefi.rs:30–50

(
    guest_mem: &M,
    guest_addr: GuestAddress,
    uefi_image: &mut F,
)

type Result<T> = result::Result<T, Error>;

pub fn load_uefi<F, M: GuestMemory>(
    guest_mem: &M,
    guest_addr: GuestAddress,
    uefi_image: &mut F,
) -> Result<()>
where
    F: Read + Seek + AsFd,
{
    let uefi_size = uefi_image
        .seek(SeekFrom::End(0))
        .map_err(|_| Error::SeekUefiEnd)? as usize;

    // edk2 image on virtual platform is smaller than 3M
    if uefi_size > 0x300000 {
        return Err(Error::UefiTooBig);
    }
    uefi_image.rewind().map_err(|_| Error::SeekUefiStart)?;
    guest_mem
        .read_exact_volatile_from(guest_addr, &mut uefi_image.as_fd(), uefi_size)
        .map_err(|_| Error::ReadUefiImage)
}