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Fix DMA writing to dangling pointers in ethmac.

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This commit is contained in:
whitequark 2018-03-26 12:35:28 +00:00
parent 83629cac49
commit f067d0fee9
2 changed files with 11 additions and 7 deletions
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13
firmware/src/ethmac.rs
View File

@ -355,14 +355,17 @@ impl DeviceInner {
pub struct Device(RefCell<DeviceInner>);
impl Device {
pub fn new(mac: EthernetAddress) -> Device {
let mut inner = DeviceInner::new();
inner.init(mac);
Device(RefCell::new(inner))
pub fn new() -> Device {
Device(RefCell::new(DeviceInner::new()))
}
// After `init` is called, `Device` shall not be moved.
pub unsafe fn init(&mut self, mac: EthernetAddress) {
self.0.borrow_mut().init(mac);
}
}
impl<'a> phy::Device<'a> for Device {
impl<'a, 'b> phy::Device<'a> for &'b mut Device {
type RxToken = RxToken<'a>;
type TxToken = TxToken<'a>;

5
firmware/src/main.rs
View File

@ -164,8 +164,9 @@ fn main() {
println!("MAC {} IP {}", hardware_addr, ip_addrs[0]);
let mut neighbor_cache_storage = [None; 8];
let neighbor_cache = NeighborCache::new(&mut neighbor_cache_storage[..]);
let device = ethmac::Device::new(hardware_addr);
let mut iface = EthernetInterfaceBuilder::new(device)
let mut device = ethmac::Device::new();
unsafe { device.init(hardware_addr) };
let mut iface = EthernetInterfaceBuilder::new(&mut device)
.ethernet_addr(hardware_addr)
.neighbor_cache(neighbor_cache)
.ip_addrs(&mut ip_addrs[..])