BUG?: Fail to list after original version of tockloader uninstalls apps

[eva-cosma]

After installing and then uninstalling an app using python tockloader, our tockloade-rs fails to list all apps. The issue seems to stem from random data being left behind. Unknown if error is part of the uninstallation process, listing process, or a mixture of both.

[eva-cosma]

When uninstalling an app, tockloader replaces the TbfHeaderV2 with a Padding (see

tockloader-rs/tbf-parser/src/types.rs

Line 809 in 76b9397

pub enum TbfHeader {

). For padding, header.get_binary_end() returns 0. This makes the program behave incorectly. (see

tockloader-rs/tockloader-lib/src/attributes/app_attributes.rs

Line 84 in 76b9397

let binary_end_offset = header.get_binary_end();

)

[eva-cosma]

Culprit in tockloader code:https://github.com/tock/tockloader/blob/57f3dbb9fc61c1d2126c068a5c79ee9738080c41/tockloader/tockloader.py#L529

So it is fully intended for uninstalled apps to be replaced with padding when uninstalling

[eva-cosma]

And some even more interesting behaviour, when erasing all apps, tockloader just removes the first page of memory from the apps address. How bizzare.

https://github.com/tock/tockloader/blob/57f3dbb9fc61c1d2126c068a5c79ee9738080c41/tockloader/tockloader.py#L584-585

[eva-cosma]

To be checked after #110 or some of its dependencies gets merged