Add UEFI Firmare Volume Variable Store pattern #421
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Add a pattern for UEFI Firmare Volume Variable store. This file type is commonly used with virtual machine UEFI variable files, like OVMF.fd used with QEMU. You could also extract a UEFI firmware binary from a flash device, search for the FV Variable Store, and set this pattern to the FV address. Signed-off-by: Marc Jones <marcj303@gmail.com>
marcj303
commented
Jul 11, 2025
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| struct UEFI_VARIABLE { | ||
| AUTHENTICATED_VARIABLE_HEADER Header; // TODO: Check authenticated vs normal variable... |
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I wasn't sure how to define the struct based on the attribute inside the struct. Any advice would be helpful.
marcj303
commented
Jul 11, 2025
| // Index through the Uefi variables until we don't find a Variable Signature 0x55AA | ||
| UEFI_VARIABLE UefiVars[while(std::mem::read_unsigned($, 2) == VAR_START_ID)] @ $; | ||
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| // TODO: grey out the Uefi variables that are in the non-active state, != VAR_ADDED. |
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I wasn't sure how to change the color attribute on the contents of a struct entry. I'd like to grey out "disabled" entries.
marcj303
commented
Jul 11, 2025
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| EFI_FIRMWARE_VOLUME_HEADER FV_Header @ 0; | ||
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| if (std::core::formatted_value(FV_Header.FileSystemGuid) != "{FFF12B8D-7696-4C8B-A985-2747075B4F50}") { |
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Is this the best way to check a GUID?
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Add a pattern for UEFI Firmare Volume Variable store. This file type is commonly used with virtual machine UEFI variable files, like OVMF.fd used with QEMU. You could also extract a UEFI firmware binary from a flash device, search for the FV Variable Store, and set this pattern to the FV address.