[llvm] [XCOFF] Support the subtype in Dwarf section headers (PR #81667)

[James Henderson via llvm-commits]

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@@ -210,6 +210,21 @@ bool XCOFFWriter::initSectionHeaders(uint64_t &CurrentOffset) {
         return false;
       }
     }
+    if (InitSections[I].SectionSubtype) {
+      uint32_t DwarfSubtype =
+          static_cast<uint32_t>(*InitSections[I].SectionSubtype);
+      if (InitSections[I].Flags != XCOFF::STYP_DWARF) {
+        ErrHandler("a DwarfSectionSubtype is only allowed for a dwarf section");
+        return false;
+      }
+      unsigned mask = Is64Bit ? XCOFFSectionHeader64::SectionFlagsSubtypeMask
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jh7370 wrote:

Wrong name style.

https://github.com/llvm/llvm-project/pull/81667