[lld] Enough LLD changes to bootstrap OpenBSD on sparc64 (PR #207609)

[Fangrui Song via llvm-commits]

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@@ -3836,6 +3845,7 @@ void elf::combineEhSections(Ctx &ctx) {
     EhFrameSection &eh = *ctx.in.ehFrame;
     sec->parent = &eh;
     eh.addralign = std::max(eh.addralign, sec->addralign);
+    eh.flags |= sec->flags & SHF_WRITE;
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MaskRay wrote:

This is really backward. Can you change compilers to not use absolute FDE/personality encodings, allowing .eh_frame to be readonly (like every other arch)?

https://github.com/llvm/llvm-project/pull/207609