[COFF] Map truncated .eh_frame section name

PE/COFF sections can have section names truncated to 8 chars, in order to
have the name available at runtime. (The string table, where long untruncated
names are stored, isn't loaded at runtime.)

This allows various llvm tools to dump the .eh_frame section from such
executables.

Patch by Peiyuan Song!

Differential Revision: https://reviews.llvm.org/D55407

llvm-svn: 348708

1 files changed, 6 insertions, 0 deletions

diff --git a/llvm/lib/Object/COFFObjectFile.cpp b/llvm/lib/Object/COFFObjectFile.cpp
index f09401307b4..2ac9c0e2321 100644
--- a/llvm/lib/Object/COFFObjectFile.cpp
+++ b/llvm/lib/Object/COFFObjectFile.cpp
@@ -1284,6 +1284,12 @@ bool COFFObjectFile::isRelocatableObject() const {
   return !DataDirectory;
 }
 
+StringRef COFFObjectFile::mapDebugSectionName(StringRef Name) const {
+  return StringSwitch<StringRef>(Name)
+      .Case("eh_fram", "eh_frame")
+      .Default(Name);
+}
+
 bool ImportDirectoryEntryRef::
 operator==(const ImportDirectoryEntryRef &Other) const {
   return ImportTable == Other.ImportTable && Index == Other.Index;