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NEWS: Clarify overlapping UKI PE section offsets

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This commit is contained in:
Jan Janssen 2022-10-31 09:52:56 +01:00 committed by Lennart Poettering
parent 0e523432aa
commit 6e50cf38a6
2 changed files with 12 additions and 2 deletions
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10
NEWS
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@ -229,8 +229,14 @@ CHANGES WITH 252 in spe:
* The sd-boot stub exports a StubFeatures flag, which is used by
bootctl to show features supported by the stub that was used to boot.
* sd-boot will now try to detect and warn about overlapping PE sections
in the UKI.
* The PE section offsets that are used by tools that assemble unified
kernel images have historically been hard-coded. This may lead to
overlapping PE sections which may break on boot. The UKI will now try
to detect and warn about this.
Any tools that assemble UKIs must update to calculate these offsets
dynamically. Future sd-stub versions may use offsets that will not
work with the currently used set of hard-coded offsets!
* sd-stub now accepts (and passes to the initrd and then to the full
OS) new PE sections '.pcrsig' and '.pcrkey' that can be used to embed

4
man/systemd-stub.xml
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@ -396,6 +396,10 @@
/usr/lib/systemd/boot/efi/linuxx64.efi.stub \
foo-unsigned.efi</programlisting>
<para>Note that these PE section offsets are example values and a properly assembled image must not
contain any overlapping sections (this includes already existing sections inside the stub before
assembly) or boot may fail.</para>
<para>This generates one PE executable file <filename>foo-unsigned.efi</filename> from the six individual
files for OS release information, kernel command line, boot splash image, kernel image, main initrd and
UEFI boot stub.</para>