4.6 File Specifications

The EDK II Build is used to generate UEFI and PI compliant images. Additional reference modules may conform to Intel Framework Specifications only if there are no applicable UEFI or PI specification modules.

The EDK II Build Tools will only generate UEFI/PI compliant images.

The EDK II Compatibility Package provides libraries and header files to permit building some* EDK Libraries and EDK Components referenced in an EDK II platform (DSC) file.

Note: * indicates any EDK libraries or components that do not include assembly files and do not access flash memory can use the EDK II compatibility Package

For some development activities, the EDK II Compatibility package can be used to develop and maintain original EDK platforms, components and libraries. This package also provides all of the tool source code used in the EDK. These tools are for building components and platform using the original EDK code. None of these tools is used for the EDK II build process. This EDK Compatibility package can also be used to generate files conforming to earlier releases of EFI and UEFI specifications.

This build specification does not cover the tools or build processes for EDK builds nor tools provide by the EDK II Compatibility Package.

The binary image files generated at the end of the $(MAKE) stage conform to the UEFI Images section of the UEFI specification. UEFI uses a subset of the PE32+ image format with a modified header signature. The PE32/PE32+ files are modified by the GenFw application.

Note: This application will also modify an ELF image and generate a PE32/PE32+ image.

Each PE32/PE32+ file will have sections of the original "DOS Header" over-written, a new NT_HEADER (for the PeHeader) and possibly one Optional Header for 32-bit or 64-bit options.