# r-efi - UEFI Reference Specification Protocol Constants and Definitions

## CHANGES WITH 6.0.0:

    * Change all function prototypes to use `unsafe fn`. This is a major
      change, but reflects what all downstream users have already assumed.

    * Drop the obsolete `efiapi` and `examples` feature flags. The former
      was unused, and the latter is an alias for `native`.

    * The `eficall!{}` macro is now fully inline in all of r-efi. It is
      still provided for external users, but will no longer be used by
      r-efi. All users are recommended to use `extern "efiapi"` directly.

    Contributions from: Alan Egerton, David Rheinsberg

    - Dußlingen, 2026-02-03

# r-efi - UEFI Reference Specification Protocol Constants and Definitions

## CHANGES WITH 5.3.0:

    * Remove the optional dependency on `compiler-builtins`, which was
      needed to build r-efi as part of rustc. This is no longer necessary.

    Contributions from: David Rheinsberg, Trevor Gross

    - Dußlingen, 2025-06-17

# r-efi - UEFI Reference Specification Protocol Constants and Definitions

## CHANGES WITH 5.2.0:

    * Add the memory attribute protocol.

    Contributions from: David Rheinsberg, Oliver Smith-Denny

    - Dußlingen, 2024-12-22

# r-efi - UEFI Reference Specification Protocol Constants and Definitions

## CHANGES WITH 5.1.0:

    * Mark `Guid::as_bytes` and `Guid::from_bytes` as `const fn`, aligning
      them with the other methods on `Guid`. This helps creating constant
      GUIDs via macros or other external helpers.

    Contributions from: Christopher Zurcher, David Rheinsberg

    - Dußlingen, 2024-09-01

# r-efi - UEFI Reference Specification Protocol Constants and Definitions

## CHANGES WITH 5.0.0:

    * Change the type of the `unload` function-pointer of the Loaded Image
      Protocol to `Option<Unload>`, given that it can be `NULL` to indicate
      that the image cannot be unloaded.
      This is a major API break, but any users very likely need to adjust
      anyway to avoid NULL-derefs.

    Contributions from: David Rheinsberg, John Schock

    - Dußlingen, 2024-07-30

# r-efi - UEFI Reference Specification Protocol Constants and Definitions

## CHANGES WITH 4.5.0:

    * Implement or derive more standard traits for UEFI base types. In
      particular, implement `[Partial]Eq`, `Hash`, `[Partial]Ord` for
      `Boolean`, `Status`, `Guid`, and network address types.

    * Fix the signature of `BootUninstallMultipleProtocolInterfaces` to
      match the UEFI specification. Note that it uses var-args and is thus
      not fully usable from stable Rust.

    Contributions from: Ayush Singh, David Rheinsberg, John Schock

    - Dußlingen, 2024-05-23

# r-efi - UEFI Reference Specification Protocol Constants and Definitions

## CHANGES WITH 4.4.0:

    * Add definitions for `UNACCEPTED_MEMORY_TYPE`, media device subtypes
      for device paths, before-EBS and after-RTB event groups, missing
      memory attributes.

    * Add memory masks for common memory attribute classes. The symbol
      names are takend from EDK2, yet their purpose is defined in the
      specification.

    * New protocols: platform_driver_override, bus_specific_driver_override,
      driver_family_override, load_file, load_file2, pci-io

    Contributions from: David Rheinsberg, Dmitry Mostovenko, John Schock,
                        Michael Kubacki

    - Dußlingen, 2024-03-27

# r-efi - UEFI Reference Specification Protocol Constants and Definitions

## CHANGES WITH 4.3.0:

    * Change alignment of `Guid` to 4 (was 8 before). This deviates from
      the specification, but aligns with EDK2. This should fix alignment
      mismatches when combining r-efi with EDK2, or other UEFI
      implementations.

    * `Guid` gained a new constructor `from_bytes()` to allow creating
      GUID-abstractions from foreign types based on the standardized
      memory representation.

    * Add all configuration-table GUIDs mentioned in the spec. These are
      often rooted in external specifications, but are strongly related
      to UEFI.

    * Add configuration-table definitions for RT_PROPERTIES and
      CONFORMANCE_PROFILES.

    * New protocols: hii_package_list, absolute_pointer

    Contributions from: David Rheinsberg, John Schock, Michael Kubacki,
                        Nicholas Bishop

    - Dußlingen, 2023-10-18

# r-efi - UEFI Reference Specification Protocol Constants and Definitions

## CHANGES WITH 4.2.0:

    * Bump required compiler version to: rust-1.68

    * New Protocols: debugport, debug-support, driver-diagnostics2,
                     mp-services, shell, shell-dynamic-command,
                     shell-parameters, udp-4, udp-6

    * Use const-generics instead of ZSTs to represent dynamic trailing
      members in C structs.

    * The `examples` feature has been renamed to `native` (a backwards
      compatible feature is left in place).

    * Add support for riscv64.

    * Use the official rust `efiapi` calling convention. This was
      stabilized with rust-1.68.

    Contributions from: Ayush Singh, David Rheinsberg, Rob Bradford

    - Dußlingen, 2023-03-20

# r-efi - UEFI Reference Specification Protocol Constants and Definitions

## CHANGES WITH 4.1.0:

    * New Protocols: device-path-{from,to}-text, ip4, ip6, managed-network,
                     rng, service-binding, tcp4, tcp6, timestamp

    * `ImageEntryPoint` is now correctly annotated as `eficall`.

    * `Time` now derives `Default`.

    * Fix nullable function pointers to use `Option<fn ...>`.

    * Function prototypes now have an explicit type definition and can be
      used independent of their protocol definition.

    * The new `rust-dep-of-std` feature option allows pulling in r-efi
      into the rust standard library. It prepares the crate workspace to
      be suitable for the standard library. It has no use outside of this.

    * Adopt the MIT license as 3rd licensing option to allow for
      integration into the rust compiler and ecosystem.

    Contributions from: Ayush Singh, David Rheinsberg, Joe Richey

    - Tübingen, 2022-08-23