Index: ELF/Writer.cpp
===================================================================
--- ELF/Writer.cpp
+++ ELF/Writer.cpp
@@ -168,9 +168,10 @@
 
 static Defined *addOptionalRegular(StringRef Name, SectionBase *Sec,
                                    uint64_t Val, uint8_t StOther = STV_HIDDEN,
-                                   uint8_t Binding = STB_GLOBAL) {
+                                   uint8_t Binding = STB_GLOBAL,
+                                   bool AllowMuldef = true) {
   Symbol *S = Symtab->find(Name);
-  if (!S || S->isDefined())
+  if (!S || (AllowMuldef && S->isDefined()))
     return nullptr;
   Symbol *Sym = Symtab->addDefined(Name, StOther, STT_NOTYPE, Val,
                                    /*Size=*/0, Binding, Sec,
@@ -213,9 +214,12 @@
   // _GLOBAL_OFFSET_TABLE_ and _SDA_BASE_ from the 32-bit ABI. It is used to
   // represent the TOC base which is offset by 0x8000 bytes from the start of
   // the .got section.
+  // We do not _GLOBAL_OFFSET_TABLE_ to be defined by input objects as the
+  // correctness of some relocations depends on its value.
   ElfSym::GlobalOffsetTable = addOptionalRegular(
       (Config->EMachine == EM_PPC64) ? ".TOC." : "_GLOBAL_OFFSET_TABLE_",
-      Out::ElfHeader, Target->GotBaseSymOff);
+      Out::ElfHeader, Target->GotBaseSymOff, STV_HIDDEN, STB_GLOBAL,
+      /*AllowMulDef*/ false);
 
   // __ehdr_start is the location of ELF file headers. Note that we define
   // this symbol unconditionally even when using a linker script, which
Index: test/ELF/global-offset-table-position-redef-err.s
===================================================================
--- /dev/null
+++ test/ELF/global-offset-table-position-redef-err.s
@@ -0,0 +1,13 @@
+# REQUIRES x86
+# RUN: llvm-mc -filetype=obj -triple=x86_64-pc-linux %s -o %t.o
+# RUN: not ld.lld -shared %t.o -o %t.so 2>&1 | FileCheck %s
+
+# On some targets the location of the _GLOBAL_OFFSET_TABLE_ symbol table can
+# matter for the correctness of some relocations. Follow the example of ld.gold
+# and give a multiple definition error if input objects attempt to redefine it.
+
+# CHECK: ld.lld: error: duplicate symbol: _GLOBAL_OFFSET_TABLE_
+.data
+.global _GLOBAL_OFFSET_TABLE_
+_GLOBAL_OFFSET_TABLE_:
+.word 0