[elf2] Add STB_GNU_UNIQUE support.

llvm-svn: 249193

lld/ELF/InputFiles.cpp

@@ -181,6 +181,7 @@ SymbolBody *elf2::ObjectFile<ELFT>::createSymbolBody(StringRef StringTable,
     error("unexpected binding");
   case STB_GLOBAL:
   case STB_WEAK:
+  case STB_GNU_UNIQUE:
     return new (Alloc) DefinedRegular<ELFT>(Name, *Sym, *Sections[SecIndex]);
   }
 }

lld/test/elf2/gnu-unique.s

@@ -0,0 +1,24 @@
+// RUN: llvm-mc -filetype=obj -triple=x86_64-pc-linux %s -o %t
+// RUN: lld -flavor gnu2 %t -shared -o %tout.so
+// RUN: llvm-readobj -t -dyn-symbols %tout.so | FileCheck %s
+// REQUIRES: x86
+
+// Check that STB_GNU_UNIQUE is treated as a global and ends up in the dynamic
+// symbol table as STB_GNU_UNIQUE.
+
+.global _start
+.text
+_start:
+
+.data
+.type symb, @gnu_unique_object
+symb:
+
+# CHECK:        Name: symb@
+# CHECK-NEXT:   Value:
+# CHECK-NEXT:   Size: 0
+# CHECK-NEXT:   Binding: Unique
+# CHECK-NEXT:   Type: Object
+# CHECK-NEXT:   Other: 0
+# CHECK-NEXT:   Section: .data
+# CHECK-NEXT: }