linker: Recognize SHT_INIT_ARRAY sections as constructor sections
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Authored by markj on Jul 14 2026, 11:09 PM.

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rGe1070148f676: linker: Recognize SHT_INIT_ARRAY sections as constructor sections
rG83181995593a: linker: Recognize SHT_INIT_ARRAY sections as constructor sections

Summary

We do this already for ET_REL files, but it was missed here. Note that
this function operates only on dynamically loaded files, not on
preloaded files.

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rG FreeBSD src repository

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Tests Not Applicable

Event Timeline

markj created this revision.Jul 14 2026, 11:09 PM

Herald added subscribers: olce, imp. · View Herald TranscriptJul 14 2026, 11:09 PM

markj requested review of this revision.Jul 14 2026, 11:09 PM

Harbormaster completed remote builds in B74817: Diff 182012.Jul 14 2026, 11:09 PM

markj added a parent revision: D58244: stand: Recognize SHT_INIT_ARRAY sections as constructor sections.Jul 14 2026, 11:09 PM

kib accepted this revision.Jul 15 2026, 1:35 PM

kib added inline comments.

sys/kern/link_elf.c
1311	In theory there could be both init and initarray

This revision is now accepted and ready to land.Jul 15 2026, 1:35 PM

markj added inline comments.Jul 15 2026, 2:41 PM

sys/kern/link_elf.c
1311	My motivation is really just to handle a specific case where .init_array is added by KASAN. We are not executing constructors for the kernel since for some reason we rely on the loader to pass them down in module metadata.