riscv: fix relocation constants numbering

[Jvlegod]

References:

1. https://github.com/riscv-non-isa/riscv-elf-psabi-doc/blob/master/riscv-elf.adoc
2. https://riscv-non-isa.github.io/riscv-elf-psabi-doc/

RISC-V ELF psABI version 1.1 (November 26, 2025).

Given the current psABI specification, the #PR165 is no longer applicable.

[m4b]

these are breaking changes, and I need to understand why several constants were deleted

[m4b]

why were these deleted and also constant changed?

[Jvlegod]

https://github.com/riscv-non-isa/riscv-elf-psabi-doc/blob/master/riscv-elf.adoc#relocations

The documentation shows that this conforms to the latest RISC-V ELF psABI specification.

for now:

1. Change number 41 from GNU_VTINHERIT to GOT32_PCREL

2. Change number 42 to reserved

discuss: riscv-non-isa/riscv-elf-psabi-doc#323

This has been discussed in the community.

They appeared to be copied from other ports while there is no assembly syntax
for them. Just remove them like we remove R_RISCV_GPREL_[IS].

Removing R_RISCV_RVC_LUI looks good, like we removed R_RISCV_GNU_VTINHERIT, R_RISCV_GNU_VTENTRY, R_RISCV_GPREL_I, R_RISCV_GPREL_S that were not produced by assemblers.

It seems that since numbers 41-42 were never used before and were initially set as reserved, and now that number 41 has a new number, I think it's necessary to modify them.

[m4b]

delete why were these all deleted?

[Jvlegod]

These changes are the same as above. 46-50 should be reserved here.

same here:

1. R_RISCV_RVC_LUI: Remove R_RISCV_RVC_LUI riscv-non-isa/riscv-elf-psabi-doc#400
2. R_RISCV_GPREL_{I/S}: Revert "Add GP-relative relocations" riscv-non-isa/riscv-elf-psabi-doc#427
3. R_RISCV_TPREL_{I/S}:
   • https://patchwork.ozlabs.org/project/glibc/patch/mvmzfrrrj83.fsf@suse.de/

   • Update the list of RISC-V relocations from the ELF psABI as of June 2024.
     It removes binutils-internal only relocations that were never part of
     actual object files. The GNU_VTINHERIT and GNU_VTENTRY relocations were
     never used because the corresponding GCC option -fvtable-gc was never
     supported on RISC-V.

[Jvlegod]

If you think this is reasonable, I'd like to amend the PR again, because I'm reviewing the code again and found that some annotations seem to need to be changed as well.

[m4b]

Of course feel free to push or force push as much as you as want, it’s your PR :)

so just fyi removing the pub constants is technically a breaking change and it would be pushed back a bit as I like to roll up breaking changes. Alternatively can leave them in and it won’t be and will be in a minor release

[Jvlegod]

so just fyi removing the pub constants is technically a breaking change and it would be pushed back a bit as I like to roll up breaking changes. Alternatively can leave them in and it won’t be and will be in a minor release

Here's a suggestion: I'll dedicate a separate PR to the destructive changes and address it when you feel the time is right. In this PR, I'll be making changes to the non-destructive parts.

What do you think?😎

[m4b]

Sounds great !

[Jvlegod]

I have removed the parts that caused the breaking changes.

you can see #510.

[m4b]

awesome thank you!