This removes the x86 specific hlt instruction from the scheduler, and
allows us to run the scheduler code for aarch64 by implementing
Processor::wait_for_interrupt for aarch64.
This file does not contain any architecture specific implementations,
so we can move it to the Kernel base directory. Also update the relevant
include paths.
We are actually storing tpidr_el0, as can be seen in vector_table.S, but
the RegisterState.h incorrectly had tpidr_el1. This will probably save
some annoying debugging later on.
Mark other ErrorOr types as friends, and fix a typo in the &&
constructor, so that we can create an ErrorOr<Core::Object> from an
ErrorOr<GUI::Widget>. Also, add some requires() clauses to these
constructors so the error messages are clearer.
Having a `Point`, `Rect` or `Size` claim it's `null` is silly. We have
`Optional<T>` for that. For `Point`, rename `is_null` to `is_zero` to
better reflect what we're testing. For `Rect` and `Size`, `is_null` is
removed outright.
Also, remove `is_empty` from `Point`. Points can't be empty.
We were calling `Gfx::Rect<T>::is_null` which checked if the width and
height were 0. What we want to do instead, is check if the rect value
was set at all. `Optional<Rect>` is the right way to do this.
This was useful when building both i686 and x86_64 SerenityOS targets as
we could use a single toolchain build for both targets. But now all this
extra job does is create the opportunity for the toolchain to need to be
built twice (i.e. if the pipelines are backed up and the toolchain cache
is busted between these jobs while the x86_64 step is waiting for a VM).
Fixes a bug where when you had spans that that were bigger than the
grid, would create enough tracks to accomodate them. When a fixed
position is given, there should be at a minimum a row/column available
for the track. The span will be truncated if there is no space for it
later.
We currently don't support DWARF revision 5 and LLVM/Clang might create
such debug info into our binaries in x86_64, which will lead to a crash
in CrashReporter that is unable to parse that information correctly.
