proposal: debug/elf: add R_PPC64_REL24_P9NOTOC

[pmur]

This relocation is generated by gnu gas when @notoc relocations are used and the target CPU does not support power10 instructions. It is identical to R_PPC64_REL24_NOTOC, except that any linker mediated stubs should not use power10 or newer instructions.

It is not (yet?) defined by the PPC64 ELFv2 supplement, but I did encounter this behavior when creating CL 496916.

I propose adding elf.R_PPC64_REL24_P9NOTOC = 124 to support testing the internal linker.

[ianlancetaylor]

It's always OK to add these kinds of new constants to debug/*.

[gopherbot]

Change https://go.dev/cl/496918 mentions this issue: debug/elf: define R_PPC64_REL24_P9NOTOC

[pmur]

What is the correct way to add this while obeying the new API proposal requirement?

[ianlancetaylor]

You can open an issue like this one, and refer to it in $GOROOT/api/next, but it doesn't have to be a proposal issue. Thanks.