January 2017
Intermediate to advanced
322 pages
8h 17m
English
Content preview from Beyond BIOS
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Appendix A – Data Types
Table A.1 contains the set of base types that are used in all UEFI applications and EFI drivers. Use these base types to build more complex unions and structures. The file EFIBIND.H in the UDK 2010 located on www.tianocore.org contains the code required to map compiler-specific data types to the UEFI data types. If you are using a new compiler, update only this one file; all other EFI related sources should compile unmodified. Table A.2 contains the modifiers you can use in conjunction with the UEFI data types.
Table A.1: Common EFI Data Types
| Mnemonic | Description |
| BOOLEAN | Logical Boolean. 1-byte value containing a 0 for FALSE or a 1 for TRUE. Other values are undefined. |
| INTN | Signed value of native width. (4 bytes on ... |
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