[Bug ld/24676] [RISCV] Redundant R_RISCV_DTPMOD* R_RISCV_DTPREL* resulted from Global Dynamic -> Local Exec relaxation

[nelsonc1225 at sourceware dot org]

https://sourceware.org/bugzilla/show_bug.cgi?id=24676

Nelson Chu <nelsonc1225 at sourceware dot org> changed:

           What    |Removed                     |Added
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--- Comment #3 from Nelson Chu <nelsonc1225 at sourceware dot org> ---
> RISC-V psABI doesn't specify TLS relaxation. Though the code sequences are not
> relaxed, dynamic relocations should be omitted for GD->LE relaxation.

Yes, I think the root cause is what you mentioned - RISC-V GNU ld doesn't
support the TLS transitions.  I have taken a loot at this, we can refer to what
x86 did in the elf_i386_tls_transition, and then remove the unused GOT/PLT
relocations in the elf_i386_relocate_section, by handling "wrel".

This is RISC-V's TODO for many years, but seems like an optimization, so I
think the priority isn't very high for now.  If someone is interested in this
issue, the above information should be helpful.

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