capsules/src/elf_loader.rs

//! Trivial Shodan elf loader capsule

use kernel::{AppId, AppSlice, Callback, Driver, ReturnCode, Shared};
use matcha_hal::dprintf;

pub struct ElfLoaderCapsule {}

impl Driver for ElfLoaderCapsule {
    fn subscribe(&self, _: usize, _: Option<Callback>, _: AppId) -> ReturnCode {
        return ReturnCode::EINVAL;
    }

    fn command(&self, minor_num: usize, _r2: usize, _r3: usize, _app_id: AppId) -> ReturnCode {
        dprintf!("ElfLoaderCapsule::command()\n");

        if minor_num == matcha_config::CMD_ELF_LOADER_BOOT_SEL4 {
            matcha_utils::load_sel4();
            return ReturnCode::SUCCESS;
        }

        return ReturnCode::EINVAL;
    }

    fn allow(&self, _: AppId, _: usize, _: Option<AppSlice<Shared, u8>>) -> ReturnCode {
        return ReturnCode::EINVAL;
    }
}