[PATCH] D31528: [ELF][MIPS] Multi-GOT implementation

[Simon Atanasyan via llvm-commits]

On Wed, Apr 19, 2017 at 3:19 PM, Rui Ueyama <ruiu at google.com> wrote:
> But MIPS multi-GOT is not integrated well as other parts of the system, no?
> It seems that it tried to avoid making any changes to the system. It doesn't
> use any help from dynamic linker other than the regular dynamic relocation
> processing. So we have to generate more dynamic relocations than necessary
> to simulate what the dynamic linker would do for the real GOT.

As far as I understand at the time of initial multi-GOT implementation there
were two solutions. The first one - perform all modifications in a static
linker. The second one - modify both static and dynamic linkers. Complexity
are equal in both cases. In the second case it is just spread among two
components. The first solution allows linking of large files and running
such files on any systems at the price of worse loading time for large
executable files. The second solution provides better loading time, but
requires upgrading of system dynamic linkers. Probably keeping all changes
in a static linker provides more benefits and this approach has bee chosen.

Now I do not know about large amount of end-user requests on loading time
reducing so it is still not a good idea to broke compatibility and redesign
dynamic linker at least for that part of ABI.

-- 
Simon Atanasyan