vdso: Pass along path prefix maps to the vdso-elf.so script
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Authored by markj on Aug 22 2025, 7:47 PM.

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rGc3a8da8f6828: vdso: Build without debug info
rGb7e0373acb1d: vdso: Build without debug info

Summary

We build elf-vdso.so.o with -g, so the object file contains build
metadata. To ensure that kernel builds are reproducible, we need to pass
along the prefix map parameters added in commit eebadc7d8590
("sys/conf: Remap paths for reproducibility").

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rG FreeBSD src repository

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Buildable 66468
Build 63351: arc lint + arc unit

Event Timeline

markj created this revision.Aug 22 2025, 7:47 PM

Herald added a subscriber: imp. · View Herald TranscriptAug 22 2025, 7:47 PM

markj requested review of this revision.Aug 22 2025, 7:47 PM

Harbormaster completed remote builds in B66468: Diff 160840.Aug 22 2025, 7:47 PM

The space in the single shared page we use ATM is limited. I would prefer that we would strip unneeded stuff from vdso instead. Does this mean that we should remove '-g' from cc options?

In D52129#1190536, @kib wrote:

The space in the single shared page we use ATM is limited. I would prefer that we would strip unneeded stuff from vdso instead. Does this mean that we should remove '-g' from cc options?

I think it is enough to simply remove ${DEBUG}. I will test it and see.