[lld] [LLD][ELF] Add `-z execute-only-report` that checks PURECODE section flags (PR #128883)

[Peter Smith via llvm-commits]

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@@ -2177,6 +2179,38 @@ template <class ELFT> void Writer<ELFT>::checkExecuteOnly() {
                             "data and code";
 }
 
+// Check which input sections of RX output sections don't have the
+// SHF_AARCH64_PURECODE or SHF_ARM_PURECODE flag set.
+template <class ELFT> void Writer<ELFT>::checkExecuteOnlyReport() {
+  if ((ctx.arg.emachine != EM_AARCH64 && ctx.arg.emachine != EM_ARM) ||
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smithp35 wrote:

The errAlways message in the driver should mean that the emachine check is always true.

https://github.com/llvm/llvm-project/pull/128883