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link_elf_obj: Process init_array and fini_array

Authored by markj on Mar 3 2021, 9:05 PM.



Reuse the existing logic for .ctors/.dtors.

This is required for KASAN.

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markj requested review of this revision.Mar 3 2021, 9:05 PM
markj added inline comments.

I am not sure why .dtors is not handled. I don't have a use for it but can implement it if it seems worthwhile.

In principle it could be that an object contains both .ctors and SHT_INIT_ARRAY sections. I suggest to warn, at least.

BTW, we rely on ld -r correctly merge all sections with the same name+attributes, but for many reasons this might not occur. So I think a warning is due if ctors_addr is non-NULL.

Print a warning if ctors_addr is already non-zero.

This revision is now accepted and ready to land.Mar 3 2021, 10:36 PM