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Re: Multiple relocation in ELF

Ian Lance Taylor wrote:
Michael Eager <eager@eagercon.com> writes:


Can you give an example of how this might be done?  I don't think that
it is possible to apply two relocations to a single location in ELF.



You need to write the relocation semantics so that it will work.  It
won't work in general.

The 64-bit MIPS ABI is an example of a processor supplement which
applies multiple relocations to a single address.  However, it does it
in a different way, by changing the reloc format.


Just a couple of days ago on gcc@gcc.gnu.org, this very point came up. It turns out that generating jump tables for case statements is one place where this could be of use. If the jump table is in a different section than the code, you might need relocations to evaluate the distance between two symbols.

David Daney.

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