36716fe2e6
The boot-time ifunc resolver assumes that it only needs to apply IRELATIVE relocations to PLT entries. With an upcoming optimization, this assumption no longer holds, so add the support required to handle PC-relative relocations targeting GNU_IFUNC symbols. - Provide a custom symbol lookup routine that can be used in early boot. The default lookup routine uses kobj, which is not functional at that point. - Apply all existing relocations during boot rather than filtering IRELATIVE relocations. - Ensure that we continue to apply ifunc relocations in a second pass when loading a kernel module. Reviewed by: kib MFC after: 1 month Sponsored by: The FreeBSD Foundation Differential Revision: https://reviews.freebsd.org/D16749 |
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