Instead of a raw pointer use a combination of Option and NonNull which
is exactly the same size as a raw pointer, expect you cannot access a
nullpointer by accident.
The assembly is completly identical on the hot path (the one that does not
procude a panic). Only one move more on the cold path (because of the
unwrap message (?).

Changed `*mut ...` to `Option<NonNull<...>>`

See merge request uefi_alloc!1

The eh_unwind_resume lang item has been removed [1], which prevents
using uefi_std with newer toolchains.

[1]: https://github.com/rust-lang/rust/pull/67502

Remove eh_unwind_resume lang item

See merge request uefi_std!1

This is what the UEFI targets included in Rustc use for the entry point:
https://github.com/rust-lang/rust/blob/master/compiler/rustc_target/src/spec/uefi_msvc_base.rs

With this change, `uefi_std` can be used with the standard target
without passing a `-Z pre-link-arg=` argument to change the entry point
to `_start`.

Use efi_main() instead of start() as name for entry point

See merge request uefi_std!2

The UEFI crate has been updated to use try_trait_v2, which changes how
Status is used.

Signed-off-by: Tim Crawford <tcrawford@system76.com>

Update uefi dep, fix building on nightly

See merge request uefi_alloc!2

Update dependencies and remove raw feature.

Signed-off-by: Tim Crawford <crawfxrd@gmail.com>

Fix building on nightly

See merge request uefi_std!3

Don't overwrite the pointer with the status, which will be 0.

Fixes: 619d351b ("Update uefi dep, fix building on nightly")

Signed-off-by: Tim Crawford <tcrawford@system76.com>

Fix global allocator

See merge request uefi_alloc!3

Enable the ABI feature and use it for the entry point. This will set
calling conventions to what is specified by the UEFI spec.

It currently only sets x86-64 to `win64` and everything else to `C`.

Signed-off-by: Tim Crawford <crawfxrd@gmail.com>

Use efiapi for entry point

See merge request uefi_std!5

Done with git-filter-branch:

    cd uefi_std
    git filter-repo --to-subdirectory-filter uefi_std
    cd ../uefi
    git remote add -f uefi_std ../uefi_std
    git merge --allow-unrelated-histories uefi_std/master

Signed-off-by: Tim Crawford <tcrawford@system76.com>

Done with git-filter-branch:

    cd uefi_alloc
    git filter-repo --to-subdirectory-filter uefi_alloc
    cd ../uefi
    git remote add -f uefi_alloc ../uefi_alloc
    git merge --allow-unrelated-histories uefi_alloc/master

Signed-off-by: Tim Crawford <tcrawford@system76.com>

With the other UEFI crates now imported as subdirectories, convert the
repo to a workspace with a virtual manifest.

Signed-off-by: Tim Crawford <tcrawford@system76.com>

Make a new release for the crates to update the repository links that
show up in the index.

Signed-off-by: Tim Crawford <tcrawford@system76.com>

Signed-off-by: Tim Crawford <tcrawford@system76.com>

Import other UEFI crates and convert to workspace

Closes #3

See merge request !6

Set the highest bit for a usize instead of hardcoding bit 63. Fixes
compilation on i686-unknown-uefi.

Signed-off-by: Tim Crawford <tcrawford@system76.com>

uefi: Fix Status `ERROR_BIT`

Closes #2

See merge request !7

Specify the path to uefi crates so that the local checkout is used when
developing instead of pulling from crates.io.

Ref: https://doc.rust-lang.org/cargo/reference/specifying-dependencies.html#multiple-locations


Signed-off-by: Tim Crawford <tcrawford@system76.com>

Use local checkout of deps when developing

See merge request !8

asm has been stabilized in Rust 1.59.0. It is now available in
`core::arch` and not the prelude.

Fixes compiling with the 2022-03-18 toolchain now used by Redox.

Signed-off-by: Tim Crawford <tcrawford@system76.com>

Remove asm from prelude, drop feature

See merge request !9

Some math functions are exposed through compiler-builtins on newer
releases.

Fixes building system76/firmware-setup with new toolchain.

Ref: https://github.com/rust-lang/compiler-builtins/pull/435


Signed-off-by: Tim Crawford <tcrawford@system76.com>

Fix the following:

- clippy::zero_ptr
- clippy::single_char_add_str
- clippy::or_fun_call
- clippy::needless_borrow

Signed-off-by: Tim Crawford <tcrawford@system76.com>

uefi-std: Drop fmodf

See merge request !10

Fix some clippy warnings

See merge request !11