[lld] [ELF] Align the end of PT_GNU_RELRO associated PT_LOAD to a common-page-size boundary (PR #66042)

[Peter Smith via llvm-commits]

https://github.com/smithp35 commented:

Thanks for updating the description, it is clearer what the problem is now.

Is the concern about the padding section that there may be no pattern, or orphan placement might put it in the wrong place? For example in a linker script with DATA_SEGMENT_RELRO_END I could see it being worth inserting the padding section in that case as there would be a clear insertion point.

I agree that most people using linker scripts are embedded users, although another use case is using ld --verbose and editing it then using it with lld. This would have DATA_SEGMENT_RELRO_END.

Are there sufficient differences from GNU ld to make it worth updating the linker script differences doc https://lld.llvm.org/ELF/linker_script.html 

https://github.com/llvm/llvm-project/pull/66042