Relevant micropython commits:
01374d941f9d7398e35990b574769b20c6779457 py/mpconfig.h: Define initial templates for "feature levels".
7b89ad8dbf432ab51eea6d138e179bf51394c786 py/vm: Add a fast path for LOAD_ATTR on instance types.
68219a295c75457c096ac42dbe8411b84e1e1a51 stm32: Enable LOAD_ATTR fast path, and map lookup caching on >M0.
e0bf4611c3a8b23b3c52e6a7804aac341ac3a87d py: Only search frozen modules when '.frozen' is found in sys.path.
f2040bfc7ee033e48acef9f289790f3b4e6b74e5 py: Rework bytecode and .mpy file format to be mostly static data.
926b554dafffa1e9bd80aa12fea5c621221c9d79 extmod/moduos: Create general uos module to be used by all ports.
2b409ef8a46015f8f3bd20bc44e644637dbe9bd3 unix/moduos: Convert module to use extmod version.
47f634300c5572571816817f16836113c98814ae py: Change makemoduledefs process so it uses output of qstr extraction.
0e7bfc88c6ac6b5d64240f91183a3cfe2ab67ade all: Use mp_obj_malloc everywhere it's applicable.
2a6ba47110be88ff1e1f5abd1bd76c353447884c py/obj: Add static safety checks to mp_obj_is_type().
In a very weird situation, our declaration of `shutdown()` shadows a
function `shutdown(int, int)` from sys/socket, which _just happens_ to
be called by libxcb when closing the sdl window. This calls
`main_clean_exit` which calls into micropython and causes at best an
uncaught NLR and at worst an outright segfault because by that time the
micropython environment doesn't exist anymore.
I didn't think this sort of thing would be possible but here we are??
Fixed by removing `__shutdown()` and replacing `shutdown` with
`trezor_shutdown`
Features `micropython` and `protobuf` are defined. Protobuf implies micropython
because our protobuf impl is pretty much _for_ micropython.
The respective subdirs are included only if the matching feature is defined.
util.rs is moved to micropython because it mostly concerns micropython interop
ResultExt, useful only for ui_debug, is moved to ui::util.
A new module `trezorhal::time` is provided. It mirrors functionality of
`micropython::time` via stmlib functions. The intended use is to always use
functions from `trezorhal::time`. The right micropython variants are used when
micropython is available, otherwise the pure stmlib versions are called.
ui::*::layout is conditional for micropython feature, because it only concerns
micropython layouts. If we want to reuse layouts defined there, we will need to
export them to not depend on Objs and Qstrs etc.
