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This is what I've learned about link-set.
TL;DR - link-set is fine except already unused sections are exposed
after final link
- link-set is a set of macros __link_set_*` defined in sys/cdefs.h
- link-set provides format-neutral way to generate linker sections.
- link-set relys on the feature of ld(1) that ld(1) automatically
generates __start_XXX and__stop_xxx symbols for sections not starting
. (xxx matches).
- Those two symbols are only generated at final link. Not generated at
relocatable output (ld -r).
- link-set collects read-only pointers of specified objects.
- link-set is meant to collect those pointers and digest them within kernel.
- The most typical use-case is to iterate pointers from __start_xxx to
- link-set sections don't need to be exposed in "netbsd" kernek,
because no external linker/loader refer to link-set sections.
- Kernel module (modular(9)) loader looks for the link_set_modules
section in kernel modules (*.kmod). Which means that kernel modules
should expose the link_set_modules section.
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