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Avoid write to not-erased magic

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This introduces an additional marker to the state partition right after the magic which indicates whether the current progress is valid or not. Validation in tests that we never write without an erase is added.

There is currently a FIXME in the FirmwareUpdater. Let me know if we should take the erase value as a parameter. I opened a feature request in embedded-storage to get this value in the trait. Before this, the assumption about ERASE_VALUE=0xFF was the same.
This commit is contained in:
Rasmus Melchior Jacobsen
2023-04-04 07:18:29 +02:00
parent 7c11d85e1e
commit df3a1e1b9d
4 changed files with 63 additions and 81 deletions
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6
embassy-boot/boot/src/lib.rs
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@ -93,7 +93,7 @@ mod tests {
const STATE: Partition = Partition::new(0, 4096);
const ACTIVE: Partition = Partition::new(4096, 61440);
const DFU: Partition = Partition::new(61440, 122880);
let mut flash = MemFlash::<131072, 4096, 4>::random().with_limited_erase_before_write_verification(4..);
let mut flash = MemFlash::<131072, 4096, 4>::random();
let original: [u8; ACTIVE.len()] = [rand::random::<u8>(); ACTIVE.len()];
let update: [u8; DFU.len()] = [rand::random::<u8>(); DFU.len()];
@ -166,7 +166,7 @@ mod tests {
let mut active = MemFlash::<16384, 4096, 8>::random();
let mut dfu = MemFlash::<16384, 2048, 8>::random();
let mut state = MemFlash::<4096, 128, 4>::random().with_limited_erase_before_write_verification(2048 + 4..);
let mut state = MemFlash::<4096, 128, 4>::random();
let mut aligned = [0; 4];
let original: [u8; ACTIVE.len()] = [rand::random::<u8>(); ACTIVE.len()];
@ -220,7 +220,7 @@ mod tests {
let mut aligned = [0; 4];
let mut active = MemFlash::<16384, 2048, 4>::random();
let mut dfu = MemFlash::<16384, 4096, 8>::random();
let mut state = MemFlash::<4096, 128, 4>::random().with_limited_erase_before_write_verification(2048 + 4..);
let mut state = MemFlash::<4096, 128, 4>::random();
let original: [u8; ACTIVE.len()] = [rand::random::<u8>(); ACTIVE.len()];
let update: [u8; DFU.len()] = [rand::random::<u8>(); DFU.len()];