Fix asm printing of associated sections.

Make MCSectionELF::AssociatedSection be a link to a symbol, because
that's how it works in the assembly, and use it in the asm printer.

llvm-svn: 297769

1 files changed, 9 insertions, 5 deletions

diff --git a/llvm/lib/MC/ELFObjectWriter.cpp b/llvm/lib/MC/ELFObjectWriter.cpp
index 18dd50826a5..b6f21ba26b6 100644
--- a/llvm/lib/MC/ELFObjectWriter.cpp
+++ b/llvm/lib/MC/ELFObjectWriter.cpp
@@ -1156,8 +1156,8 @@ void ELFObjectWriter::writeSection(const SectionIndexMapTy &SectionIndexMap,
   case ELF::SHT_RELA: {
     sh_link = SymbolTableIndex;
     assert(sh_link && ".symtab not found");
-    const MCSectionELF *InfoSection = Section.getAssociatedSection();
-    sh_info = SectionIndexMap.lookup(InfoSection);
+    const MCSection *InfoSection = Section.getAssociatedSection();
+    sh_info = SectionIndexMap.lookup(cast<MCSectionELF>(InfoSection));
     break;
   }
 
@@ -1177,8 +1177,11 @@ void ELFObjectWriter::writeSection(const SectionIndexMapTy &SectionIndexMap,
     break;
   }
 
-  if (Section.getFlags() & ELF::SHF_LINK_ORDER)
-    sh_link = SectionIndexMap.lookup(Section.getAssociatedSection());
+  if (Section.getFlags() & ELF::SHF_LINK_ORDER) {
+    const MCSymbol *Sym = Section.getAssociatedSymbol();
+    const MCSectionELF *Sec = cast<MCSectionELF>(&Sym->getSection());
+    sh_link = SectionIndexMap.lookup(Sec);
+  }
 
   WriteSecHdrEntry(StrTabBuilder.getOffset(Section.getSectionName()),
                    Section.getType(), Section.getFlags(), 0, Offset, Size,
@@ -1302,7 +1305,8 @@ void ELFObjectWriter::writeObject(MCAssembler &Asm,
     // Remember the offset into the file for this section.
     uint64_t SecStart = getStream().tell();
 
-    writeRelocations(Asm, *RelSection->getAssociatedSection());
+    writeRelocations(Asm,
+                     cast<MCSectionELF>(*RelSection->getAssociatedSection()));
 
     uint64_t SecEnd = getStream().tell();
     SectionOffsets[RelSection] = std::make_pair(SecStart, SecEnd);