Re: HELP: MIPS PC Relative Addressing

On Wed, 24 Feb 2021, Jim Wilson wrote:

quoted

 I commented on it once, in the course of the FDPIC design project, and I
find it broken by design.  Sadly it has made it into the RISC-V psABI and
it is hard to revert at this time, too many places have started relying on
it.

It was already a production ABI before you asked for the change.  And
changing a production ABI is extremely difficult.  You were not the first
to complain about this, and you probably won't be the last.

 Thanks for chiming in.

 I accepted it as a fact of life, but we don't have to follow the mistake 
with the MIPS psABI.  If you ever decide to have a RISC-V NewABI just as 
MIPS did at one point, then you can reevaluate the choices made.  At least 
there are no REL relocations there with RISC-V, it was a gross mistake to 
have them with MIPS o32.  I think we can try switching away from them with 
R6, or at least evaluate what would be required to do so.

  Maciej