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Add note about canonical order of UKI components #181

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Add note about canonical order of UKI components #181

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Add note about canonical order of UKI components
arianvp Nov 14, 2025
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Add line-breaks
arianvp Nov 14, 2025
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Update specs/unified_kernel_image.md
arianvp Nov 14, 2025
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4 changes: 4 additions & 0 deletions specs/unified_kernel_image.md
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Expand Up @@ -47,6 +47,10 @@ header to 0x0A (i.e. `IMAGE_SUBSYSTEM_EFI_APPLICATION`).
## UKI Components
UKIs consist of the following resources:

<!--
NOTE: these components are in canonical for predictable PCR measurements.
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Please add any new components at the bottom of the list and NEVER reorder anything in this list.
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@bluca bluca Nov 14, 2025

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Actually I think pcrsig and pcrpkey are the exception to this? IE, new things should be added before .pcrsig, but these two are never used for measurements

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@arianvp arianvp Nov 14, 2025

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This is not true. .pcrpkey is measured.

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@bluca bluca Nov 14, 2025

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Before the pub key one then? I haven't checked

-->
* An UEFI boot stub that forms the initial program.
It contains various PE sections normally required for a program,
including `.text`, `.reloc`, `.data`, and others.
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