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Rollup merge of #104793 - nicholasbishop:bishop-add-efiapi, r=JohnTitor

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unstable-book: Add page for the `abi_efiapi` feature

Tracking issue for `abi_efiapi`: https://github.com/rust-lang/rust/issues/65815
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Matthias Krüger 2022-11-25 10:44:39 +01:00 committed by GitHub
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# `abi_efiapi`
The tracking issue for this feature is: [#65815]
[#65815]: https://github.com/rust-lang/rust/issues/65815
------------------------
The `efiapi` calling convention can be used for defining a function with
an ABI compatible with the UEFI Interfaces as defined in the [UEFI
Specification].
Example:
```rust
#![feature(abi_efiapi)]
extern "efiapi" { fn f1(); }
extern "efiapi" fn f2() { todo!() }
```
[UEFI Specification]: https://uefi.org/specs/UEFI/2.10/