rjmccall added a comment. There's two independently-useful things here for the relocation, right? First, it's useful to be able to express a relocation to a symbol that has the semantics of a particular function but doesn't necessarily have its address, and that concept could be used across many "physical" relocations; and second, it's potentially useful to have a shifted-by-two relative address relocation, at least on AArch64 where instructions (and v-table entries under this ABI) are always four-byte-aligned anyway. Is it possible to separate these concerns in ELF, e.g. by having a "symbol" that can be the target of any other relocation but which actually represents a function of unspecified address with the semantics of another function?
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