Index: lld/test/wasm/data-layout.s
===================================================================
--- lld/test/wasm/data-layout.s
+++ lld/test/wasm/data-layout.s
@@ -1,12 +1,12 @@
 # RUN: llvm-mc -filetype=obj -triple=wasm32-unknown-unknown %p/Inputs/hello.s -o %t.hello32.o
 # RUN: llvm-mc -filetype=obj -triple=wasm32-unknown-unknown %s -o %t32.o
 # RUN: wasm-ld -m wasm32 -no-gc-sections --export=__data_end --export=__heap_base --allow-undefined --no-entry -o %t32.wasm %t32.o %t.hello32.o
-# RUN: obj2yaml %t32.wasm | FileCheck --check-prefixes CHECK,CHK32 %s
+# RUN: obj2yaml %t32.wasm | FileCheck -DPTR=I32 %s
 #
 # RUN: llvm-mc -filetype=obj -triple=wasm64-unknown-unknown %p/Inputs/hello.s -o %t.hello64.o
 # RUN: llvm-mc -filetype=obj -triple=wasm64-unknown-unknown %s -o %t64.o
 # RUN: wasm-ld -m wasm64 -no-gc-sections --export=__data_end --export=__heap_base --allow-undefined --no-entry -o %t64.wasm %t64.o %t.hello64.o
-# RUN: obj2yaml %t64.wasm | FileCheck --check-prefixes CHECK,CHK64 %s
+# RUN: obj2yaml %t64.wasm | FileCheck --check-prefixes CHECK,CHK64 -DPTR=I64 %s
 
         .section .data.foo,"",@
         .globl  foo
@@ -59,24 +59,22 @@
 # CHECK-NEXT:   - Type:            GLOBAL
 # CHECK-NEXT:     Globals:
 # CHECK-NEXT:       - Index:           0
-# CHK32-NEXT:         Type:            I32
-# CHK64-NEXT:         Type:            I64
+# CHECK-NEXT:         Type:            [[PTR]]
 # CHECK-NEXT:         Mutable:         true
 # CHECK-NEXT:         InitExpr:
-# CHK32-NEXT:           Opcode:          I32_CONST
-# CHK64-NEXT:           Opcode:          I64_CONST
+# CHECK-NEXT:           Opcode:          [[PTR]]_CONST
 # CHECK-NEXT:           Value:           66624
 # CHECK-NEXT:       - Index:           1
-# CHECK-NEXT:         Type:            I32
+# CHECK-NEXT:         Type:            [[PTR]]
 # CHECK-NEXT:         Mutable:         false
 # CHECK-NEXT:         InitExpr:
-# CHECK-NEXT:           Opcode:          I32_CONST
+# CHECK-NEXT:           Opcode:          [[PTR]]_CONST
 # CHECK-NEXT:           Value:           1080
 # CHECK-NEXT:       - Index:           2
-# CHECK-NEXT:         Type:            I32
+# CHECK-NEXT:         Type:            [[PTR]]
 # CHECK-NEXT:         Mutable:         false
 # CHECK-NEXT:         InitExpr:
-# CHECK-NEXT:           Opcode:          I32_CONST
+# CHECK-NEXT:           Opcode:          [[PTR]]_CONST
 # CHECK-NEXT:           Value:           66624
 
 # CHECK:        - Type:            DATA
@@ -84,15 +82,13 @@
 # CHECK-NEXT:       - SectionOffset:   7
 # CHECK-NEXT:         InitFlags:       0
 # CHECK-NEXT:         Offset:
-# CHK32-NEXT:           Opcode:          I32_CONST
-# CHK64-NEXT:           Opcode:          I64_CONST
+# CHECK-NEXT:           Opcode:          [[PTR]]_CONST
 # CHECK-NEXT:           Value:           1024
 # CHECK-NEXT:         Content:         68656C6C6F0A00
 # CHECK-NEXT:       - SectionOffset:   20
 # CHECK-NEXT:         InitFlags:       0
 # CHECK-NEXT:         Offset:
-# CHK32-NEXT:           Opcode:          I32_CONST
-# CHK64-NEXT:           Opcode:          I64_CONST
+# CHECK-NEXT:           Opcode:          [[PTR]]_CONST
 # CHECK-NEXT:           Value:           1040
 
 
Index: lld/test/wasm/shared.ll
===================================================================
--- lld/test/wasm/shared.ll
+++ lld/test/wasm/shared.ll
@@ -1,8 +1,9 @@
-; RUN: llc -relocation-model=pic -mattr=+mutable-globals -filetype=obj %s -o %t.o
+; RUN: llc --mtriple=wasm32-unknown-emscripten -relocation-model=pic -mattr=+mutable-globals -filetype=obj %s -o %t.o
 ; RUN: wasm-ld --experimental-pic -shared -o %t.wasm %t.o
-; RUN: obj2yaml %t.wasm | FileCheck %s
-
-target triple = "wasm32-unknown-emscripten"
+; RUN: obj2yaml %t.wasm | FileCheck --check-prefixes=CHECK,CHK32 -DPTR=I32 %s
+; RUN: llc --mtriple=wasm64-unknown-emscripten -relocation-model=pic -mattr=+mutable-globals -filetype=obj %s -o %t.o
+; RUN: wasm-ld -mwasm64 --experimental-pic -shared -o %t.wasm %t.o
+; RUN: obj2yaml %t.wasm | FileCheck --check-prefixes=CHECK,CHK64 -DPTR=I64 %s
 
 @data = hidden global i32 2, align 4
 @data_external = external global i32
@@ -52,8 +53,10 @@
 ; CHECK:      Sections:
 ; CHECK-NEXT:   - Type:            CUSTOM
 ; CHECK-NEXT:     Name:            dylink
-; CHECK-NEXT:     MemorySize:      24
-; CHECK-NEXT:     MemoryAlignment: 2
+; CHK32-NEXT:     MemorySize:      24
+; CHK64-NEXT:     MemorySize:      48
+; CHK32-NEXT:     MemoryAlignment: 2
+; CHK64-NEXT:     MemoryAlignment: 3
 ; CHECK-NEXT:     TableSize:       2
 ; CHECK-NEXT:     TableAlignment:  0
 ; CHECK-NEXT:     Needed:          []
@@ -67,6 +70,7 @@
 ; CHECK-NEXT:         Field:           memory
 ; CHECK-NEXT:         Kind:            MEMORY
 ; CHECK-NEXT:         Memory:
+; CHK64-NEXT:           Flags: [ IS_64 ]
 ; CHECK-NEXT:           Minimum:       0x1
 ; CHECK-NEXT:       - Module:          env
 ; CHECK-NEXT:         Field:           __indirect_function_table
@@ -79,18 +83,23 @@
 ; CHECK-NEXT:       - Module:          env
 ; CHECK-NEXT:         Field:           __stack_pointer
 ; CHECK-NEXT:         Kind:            GLOBAL
-; CHECK-NEXT:         GlobalType:      I32
+; CHECK-NEXT:         GlobalType:      [[PTR]]
 ; CHECK-NEXT:         GlobalMutable:   true
 ; CHECK-NEXT:       - Module:          env
 ; CHECK-NEXT:         Field:           __memory_base
 ; CHECK-NEXT:         Kind:            GLOBAL
-; CHECK-NEXT:         GlobalType:      I32
+; CHECK-NEXT:         GlobalType:      [[PTR]]
 ; CHECK-NEXT:         GlobalMutable:   false
 ; CHECK-NEXT:       - Module:          env
 ; CHECK-NEXT:         Field:           __table_base
 ; CHECK-NEXT:         Kind:            GLOBAL
-; CHECK-NEXT:         GlobalType:      I32
+; CHECK-NEXT:         GlobalType:      [[PTR]]
 ; CHECK-NEXT:         GlobalMutable:   false
+; CHK64-NEXT:       - Module:          env
+; CHK64-NEXT:         Field:           __table_base32
+; CHK64-NEXT:         Kind:            GLOBAL
+; CHK64-NEXT:         GlobalType:      I32
+; CHK64-NEXT:         GlobalMutable:   false
 ; CHECK-NEXT:       - Module:          env
 ; CHECK-NEXT:         Field:           func_external
 ; CHECK-NEXT:         Kind:            FUNCTION
@@ -129,7 +138,8 @@
 ; CHECK-NEXT:     Segments:
 ; CHECK-NEXT:       - Offset:
 ; CHECK-NEXT:           Opcode:          GLOBAL_GET
-; CHECK-NEXT:           Index:           2
+; CHK32-NEXT:           Index:           2
+; CHK64-NEXT:           Index:           3
 ; CHECK-NEXT:         Functions:       [ 4, 3 ]
 
 ; check the generated code in __wasm_call_ctors and __wasm_apply_data_relocs functions
@@ -142,7 +152,8 @@
 ; CHECK-NEXT:         Body:            10020B
 ; CHECK-NEXT:       - Index:           2
 ; CHECK-NEXT:         Locals:          []
-; CHECK-NEXT:         Body:            230141046A230241016A360200230141086A23043602002301410C6A230141006A360200230141106A2305360200230141146A230641046A3602000B
+; CHK32-NEXT:         Body:            230141046A230241016A360200230141086A23043602002301410C6A230141006A360200230141106A2305360200230141146A230641046A3602000B
+; CHK64-NEXT:         Body:            230142087C230241016A360200230142107C2305360200230142187C230142007C370200230142207C2306370200230142287C230742047C3702000B
 
 ; check the data segment initialized with __memory_base global as offset
 
@@ -153,4 +164,5 @@
 ; CHECK-NEXT:         Offset:
 ; CHECK-NEXT:           Opcode:          GLOBAL_GET
 ; CHECK-NEXT:           Index:           1
-; CHECK-NEXT:         Content:         '020000000100000000000000000000000000000000000000'
+; CHK32-NEXT:         Content:         '020000000100000000000000000000000000000000000000'
+; CHK64-NEXT:         Content:         '020000000000000001000000000000000000000000000000000000000000000000000000000000000000000000000000'
Index: lld/wasm/Driver.cpp
===================================================================
--- lld/wasm/Driver.cpp
+++ lld/wasm/Driver.cpp
@@ -584,15 +584,9 @@
 
 static InputGlobal *createGlobal(StringRef name, bool isMutable) {
   llvm::wasm::WasmGlobal wasmGlobal;
-  if (config->is64.getValueOr(false)) {
-    wasmGlobal.Type = {WASM_TYPE_I64, isMutable};
-    wasmGlobal.InitExpr.Opcode = WASM_OPCODE_I64_CONST;
-    wasmGlobal.InitExpr.Value.Int64 = 0;
-  } else {
-    wasmGlobal.Type = {WASM_TYPE_I32, isMutable};
-    wasmGlobal.InitExpr.Opcode = WASM_OPCODE_I32_CONST;
-    wasmGlobal.InitExpr.Value.Int32 = 0;
-  }
+  bool is64 = config->is64.getValueOr(false);
+  wasmGlobal.Type = {uint8_t(is64 ? WASM_TYPE_I64 : WASM_TYPE_I32), isMutable};
+  wasmGlobal.InitExpr = intConst(0, is64);
   wasmGlobal.SymbolName = name;
   return make<InputGlobal>(wasmGlobal, nullptr);
 }
@@ -635,12 +629,19 @@
     // which to load our static data and function table.
     // See:
     // https://github.com/WebAssembly/tool-conventions/blob/master/DynamicLinking.md
-    WasmSym::memoryBase = createUndefinedGlobal(
-        "__memory_base",
-        config->is64.getValueOr(false) ? &globalTypeI64 : &globalTypeI32);
-    WasmSym::tableBase = createUndefinedGlobal("__table_base", &globalTypeI32);
+    bool is64 = config->is64.getValueOr(false);
+    auto *globalType = is64 ? &globalTypeI64 : &globalTypeI32;
+    WasmSym::memoryBase = createUndefinedGlobal("__memory_base", globalType);
+    WasmSym::tableBase = createUndefinedGlobal("__table_base", globalType);
     WasmSym::memoryBase->markLive();
     WasmSym::tableBase->markLive();
+    if (is64) {
+      WasmSym::tableBase32 =
+          createUndefinedGlobal("__table_base32", &globalTypeI32);
+      WasmSym::tableBase32->markLive();
+    } else {
+      WasmSym::tableBase32 = nullptr;
+    }
   } else {
     // For non-PIC code
     WasmSym::stackPointer = createGlobalVariable("__stack_pointer", true);
@@ -673,6 +674,9 @@
     WasmSym::heapBase = symtab->addOptionalDataSymbol("__heap_base");
     WasmSym::definedMemoryBase = symtab->addOptionalDataSymbol("__memory_base");
     WasmSym::definedTableBase = symtab->addOptionalDataSymbol("__table_base");
+    if (config->is64.getValueOr(false))
+      WasmSym::definedTableBase32 =
+          symtab->addOptionalDataSymbol("__table_base32");
   }
 
   // For non-shared memory programs we still need to define __tls_base since we
Index: lld/wasm/InputChunks.cpp
===================================================================
--- lld/wasm/InputChunks.cpp
+++ lld/wasm/InputChunks.cpp
@@ -84,6 +84,7 @@
       existingValue = static_cast<uint64_t>(decodeSLEB128(loc, &bytesRead));
       break;
     case R_WASM_TABLE_INDEX_SLEB64:
+    case R_WASM_TABLE_INDEX_REL_SLEB64:
     case R_WASM_MEMORY_ADDR_SLEB64:
     case R_WASM_MEMORY_ADDR_REL_SLEB64:
       existingValue = static_cast<uint64_t>(decodeSLEB128(loc, &bytesRead));
@@ -168,6 +169,7 @@
       encodeSLEB128(static_cast<int32_t>(value), loc, 5);
       break;
     case R_WASM_TABLE_INDEX_SLEB64:
+    case R_WASM_TABLE_INDEX_REL_SLEB64:
     case R_WASM_MEMORY_ADDR_SLEB64:
     case R_WASM_MEMORY_ADDR_REL_SLEB64:
       encodeSLEB128(static_cast<int64_t>(value), loc, 10);
Index: lld/wasm/InputElement.h
===================================================================
--- lld/wasm/InputElement.h
+++ lld/wasm/InputElement.h
@@ -42,6 +42,18 @@
   llvm::Optional<uint32_t> assignedIndex;
 };
 
+inline WasmInitExpr intConst(uint64_t value, bool is64) {
+  WasmInitExpr ie;
+  if (is64) {
+    ie.Opcode = llvm::wasm::WASM_OPCODE_I64_CONST;
+    ie.Value.Int64 = static_cast<int64_t>(value);
+  } else {
+    ie.Opcode = llvm::wasm::WASM_OPCODE_I32_CONST;
+    ie.Value.Int32 = static_cast<int32_t>(value);
+  }
+  return ie;
+}
+
 class InputGlobal : public InputElement {
 public:
   InputGlobal(const WasmGlobal &g, ObjFile *f)
@@ -51,13 +63,7 @@
   const WasmInitExpr &getInitExpr() const { return initExpr; }
 
   void setPointerValue(uint64_t value) {
-    if (config->is64.getValueOr(false)) {
-      assert(initExpr.Opcode == llvm::wasm::WASM_OPCODE_I64_CONST);
-      initExpr.Value.Int64 = value;
-    } else {
-      assert(initExpr.Opcode == llvm::wasm::WASM_OPCODE_I32_CONST);
-      initExpr.Value.Int32 = value;
-    }
+    initExpr = intConst(value, config->is64.getValueOr(false));
   }
 
 private:
Index: lld/wasm/InputFiles.cpp
===================================================================
--- lld/wasm/InputFiles.cpp
+++ lld/wasm/InputFiles.cpp
@@ -147,7 +147,8 @@
     const WasmSymbol &sym = wasmObj->syms()[reloc.Index];
     return tableEntries[sym.Info.ElementIndex];
   }
-  case R_WASM_TABLE_INDEX_REL_SLEB: {
+  case R_WASM_TABLE_INDEX_REL_SLEB:
+  case R_WASM_TABLE_INDEX_REL_SLEB64: {
     const WasmSymbol &sym = wasmObj->syms()[reloc.Index];
     return tableEntriesRel[sym.Info.ElementIndex];
   }
@@ -221,14 +222,15 @@
   case R_WASM_TABLE_INDEX_I64:
   case R_WASM_TABLE_INDEX_SLEB:
   case R_WASM_TABLE_INDEX_SLEB64:
-  case R_WASM_TABLE_INDEX_REL_SLEB: {
+  case R_WASM_TABLE_INDEX_REL_SLEB:
+  case R_WASM_TABLE_INDEX_REL_SLEB64: {
     if (!getFunctionSymbol(reloc.Index)->hasTableIndex())
       return 0;
     uint32_t index = getFunctionSymbol(reloc.Index)->getTableIndex();
-    if (reloc.Type == R_WASM_TABLE_INDEX_REL_SLEB)
+    if (reloc.Type == R_WASM_TABLE_INDEX_REL_SLEB ||
+        reloc.Type == R_WASM_TABLE_INDEX_REL_SLEB64)
       index -= config->tableBase;
     return index;
-
   }
   case R_WASM_MEMORY_ADDR_LEB:
   case R_WASM_MEMORY_ADDR_LEB64:
Index: lld/wasm/OutputSections.cpp
===================================================================
--- lld/wasm/OutputSections.cpp
+++ lld/wasm/OutputSections.cpp
@@ -8,6 +8,7 @@
 
 #include "OutputSections.h"
 #include "InputChunks.h"
+#include "InputElement.h"
 #include "InputFiles.h"
 #include "OutputSegment.h"
 #include "WriterUtils.h"
@@ -161,12 +162,8 @@
       if (config->isPic) {
         initExpr.Opcode = WASM_OPCODE_GLOBAL_GET;
         initExpr.Value.Global = WasmSym::memoryBase->getGlobalIndex();
-      } else if (config->is64.getValueOr(false)) {
-        initExpr.Opcode = WASM_OPCODE_I64_CONST;
-        initExpr.Value.Int64 = static_cast<int64_t>(segment->startVA);
       } else {
-        initExpr.Opcode = WASM_OPCODE_I32_CONST;
-        initExpr.Value.Int32 = static_cast<int32_t>(segment->startVA);      
+        initExpr = intConst(segment->startVA, config->is64.getValueOr(false));
       }
       writeInitExpr(os, initExpr);
     }
Index: lld/wasm/Relocations.cpp
===================================================================
--- lld/wasm/Relocations.cpp
+++ lld/wasm/Relocations.cpp
@@ -104,6 +104,7 @@
     case R_WASM_TABLE_INDEX_SLEB:
     case R_WASM_TABLE_INDEX_SLEB64:
     case R_WASM_TABLE_INDEX_REL_SLEB:
+    case R_WASM_TABLE_INDEX_REL_SLEB64:
       if (requiresGOTAccess(sym))
         break;
       out.elemSec->addEntry(cast<FunctionSymbol>(sym));
Index: lld/wasm/Symbols.h
===================================================================
--- lld/wasm/Symbols.h
+++ lld/wasm/Symbols.h
@@ -563,6 +563,11 @@
   // Used in PIC code for offset of indirect function table
   static UndefinedGlobal *tableBase;
   static DefinedData *definedTableBase;
+  // 32-bit copy in wasm64 to work around init expr limitations.
+  // These can potentially be removed again once we have
+  // https://github.com/WebAssembly/extended-const 
+  static UndefinedGlobal *tableBase32;
+  static DefinedData *definedTableBase32;
 
   // __memory_base
   // Used in PIC code for offset of global data
Index: lld/wasm/Symbols.cpp
===================================================================
--- lld/wasm/Symbols.cpp
+++ lld/wasm/Symbols.cpp
@@ -87,6 +87,8 @@
 GlobalSymbol *WasmSym::tlsAlign;
 UndefinedGlobal *WasmSym::tableBase;
 DefinedData *WasmSym::definedTableBase;
+UndefinedGlobal *WasmSym::tableBase32;
+DefinedData *WasmSym::definedTableBase32;
 UndefinedGlobal *WasmSym::memoryBase;
 DefinedData *WasmSym::definedMemoryBase;
 TableSymbol *WasmSym::indirectFunctionTable;
Index: lld/wasm/SyntheticSections.cpp
===================================================================
--- lld/wasm/SyntheticSections.cpp
+++ lld/wasm/SyntheticSections.cpp
@@ -362,33 +362,30 @@
     writeGlobalType(os, g->getType());
     writeInitExpr(os, g->getInitExpr());
   }
-  // TODO(wvo): when do these need I64_CONST?
+  bool is64 = config->is64.getValueOr(false);
+  uint8_t itype = is64 ? WASM_TYPE_I64 : WASM_TYPE_I32;
   for (const Symbol *sym : internalGotSymbols) {
     // In the case of dynamic linking, internal GOT entries
     // need to be mutable since they get updated to the correct
     // runtime value during `__wasm_apply_global_relocs`.
     bool mutable_ = config->isPic & !sym->isStub;
-    WasmGlobalType type{WASM_TYPE_I32, mutable_};
+    WasmGlobalType type{itype, mutable_};
     WasmInitExpr initExpr;
-    initExpr.Opcode = WASM_OPCODE_I32_CONST;
     if (auto *d = dyn_cast<DefinedData>(sym))
-      initExpr.Value.Int32 = d->getVA();
+      initExpr = intConst(d->getVA(), is64);
     else if (auto *f = dyn_cast<FunctionSymbol>(sym))
-      initExpr.Value.Int32 = f->isStub ? 0 : f->getTableIndex();
+      initExpr = intConst(f->isStub ? 0 : f->getTableIndex(), is64);
     else {
       assert(isa<UndefinedData>(sym));
-      initExpr.Value.Int32 = 0;
+      initExpr = intConst(0, is64);
     }
     writeGlobalType(os, type);
     writeInitExpr(os, initExpr);
   }
   for (const DefinedData *sym : dataAddressGlobals) {
-    WasmGlobalType type{WASM_TYPE_I32, false};
-    WasmInitExpr initExpr;
-    initExpr.Opcode = WASM_OPCODE_I32_CONST;
-    initExpr.Value.Int32 = sym->getVA();
+    WasmGlobalType type{itype, false};
     writeGlobalType(os, type);
-    writeInitExpr(os, initExpr);
+    writeInitExpr(os, intConst(sym->getVA(), is64));
   }
 }
 
@@ -443,7 +440,10 @@
   WasmInitExpr initExpr;
   if (config->isPic) {
     initExpr.Opcode = WASM_OPCODE_GLOBAL_GET;
-    initExpr.Value.Global = WasmSym::tableBase->getGlobalIndex();
+    initExpr.Value.Global =
+        (config->is64.getValueOr(false) ? WasmSym::tableBase32
+                                        : WasmSym::tableBase)
+            ->getGlobalIndex();
   } else {
     initExpr.Opcode = WASM_OPCODE_I32_CONST;
     initExpr.Value.Int32 = config->tableBase;
Index: lld/wasm/Writer.cpp
===================================================================
--- lld/wasm/Writer.cpp
+++ lld/wasm/Writer.cpp
@@ -1380,6 +1380,8 @@
     config->tableBase = 1;
     if (WasmSym::definedTableBase)
       WasmSym::definedTableBase->setVA(config->tableBase);
+    if (WasmSym::definedTableBase32)
+      WasmSym::definedTableBase32->setVA(config->tableBase);
   }
 
   log("-- createOutputSegments");
Index: llvm/include/llvm/BinaryFormat/WasmRelocs.def
===================================================================
--- llvm/include/llvm/BinaryFormat/WasmRelocs.def
+++ llvm/include/llvm/BinaryFormat/WasmRelocs.def
@@ -26,3 +26,4 @@
 WASM_RELOC(R_WASM_MEMORY_ADDR_TLS_SLEB,   21)
 WASM_RELOC(R_WASM_FUNCTION_OFFSET_I64,    22)
 WASM_RELOC(R_WASM_MEMORY_ADDR_LOCREL_I32, 23)
+WASM_RELOC(R_WASM_TABLE_INDEX_REL_SLEB64, 24)
Index: llvm/lib/MC/WasmObjectWriter.cpp
===================================================================
--- llvm/lib/MC/WasmObjectWriter.cpp
+++ llvm/lib/MC/WasmObjectWriter.cpp
@@ -528,6 +528,7 @@
   }
 
   if (Type == wasm::R_WASM_TABLE_INDEX_REL_SLEB ||
+      Type == wasm::R_WASM_TABLE_INDEX_REL_SLEB64 ||
       Type == wasm::R_WASM_TABLE_INDEX_SLEB ||
       Type == wasm::R_WASM_TABLE_INDEX_SLEB64 ||
       Type == wasm::R_WASM_TABLE_INDEX_I32 ||
@@ -590,6 +591,7 @@
 
   switch (RelEntry.Type) {
   case wasm::R_WASM_TABLE_INDEX_REL_SLEB:
+  case wasm::R_WASM_TABLE_INDEX_REL_SLEB64:
   case wasm::R_WASM_TABLE_INDEX_SLEB:
   case wasm::R_WASM_TABLE_INDEX_SLEB64:
   case wasm::R_WASM_TABLE_INDEX_I32:
@@ -598,7 +600,8 @@
     const MCSymbolWasm *Base =
         cast<MCSymbolWasm>(Layout.getBaseSymbol(*RelEntry.Symbol));
     assert(Base->isFunction());
-    if (RelEntry.Type == wasm::R_WASM_TABLE_INDEX_REL_SLEB)
+    if (RelEntry.Type == wasm::R_WASM_TABLE_INDEX_REL_SLEB ||
+        RelEntry.Type == wasm::R_WASM_TABLE_INDEX_REL_SLEB64)
       return TableIndices[Base] - InitialTableOffset;
     else
       return TableIndices[Base];
@@ -742,6 +745,7 @@
       writePatchableSLEB<5>(Stream, Value, Offset);
       break;
     case wasm::R_WASM_TABLE_INDEX_SLEB64:
+    case wasm::R_WASM_TABLE_INDEX_REL_SLEB64:
     case wasm::R_WASM_MEMORY_ADDR_SLEB64:
     case wasm::R_WASM_MEMORY_ADDR_REL_SLEB64:
       writePatchableSLEB<10>(Stream, Value, Offset);
@@ -1757,7 +1761,8 @@
           Rel.Type != wasm::R_WASM_TABLE_INDEX_I64 &&
           Rel.Type != wasm::R_WASM_TABLE_INDEX_SLEB &&
           Rel.Type != wasm::R_WASM_TABLE_INDEX_SLEB64 &&
-          Rel.Type != wasm::R_WASM_TABLE_INDEX_REL_SLEB)
+          Rel.Type != wasm::R_WASM_TABLE_INDEX_REL_SLEB &&
+          Rel.Type != wasm::R_WASM_TABLE_INDEX_REL_SLEB64)
         return;
       assert(Rel.Symbol->isFunction());
       const MCSymbolWasm *Base =
Index: llvm/lib/Object/WasmObjectFile.cpp
===================================================================
--- llvm/lib/Object/WasmObjectFile.cpp
+++ llvm/lib/Object/WasmObjectFile.cpp
@@ -867,6 +867,7 @@
     case wasm::R_WASM_TABLE_INDEX_I32:
     case wasm::R_WASM_TABLE_INDEX_I64:
     case wasm::R_WASM_TABLE_INDEX_REL_SLEB:
+    case wasm::R_WASM_TABLE_INDEX_REL_SLEB64:
       if (!isValidFunctionSymbol(Reloc.Index))
         return make_error<GenericBinaryError>(
             "invalid relocation function index", object_error::parse_failed);
Index: llvm/lib/Target/WebAssembly/MCTargetDesc/WebAssemblyWasmObjectWriter.cpp
===================================================================
--- llvm/lib/Target/WebAssembly/MCTargetDesc/WebAssemblyWasmObjectWriter.cpp
+++ llvm/lib/Target/WebAssembly/MCTargetDesc/WebAssemblyWasmObjectWriter.cpp
@@ -76,7 +76,8 @@
       return wasm::R_WASM_GLOBAL_INDEX_LEB;
     case MCSymbolRefExpr::VK_WASM_TBREL:
       assert(SymA.isFunction());
-      return wasm::R_WASM_TABLE_INDEX_REL_SLEB;
+      return is64Bit() ? wasm::R_WASM_TABLE_INDEX_REL_SLEB64
+                       : wasm::R_WASM_TABLE_INDEX_REL_SLEB;
     case MCSymbolRefExpr::VK_WASM_TLSREL:
       return wasm::R_WASM_MEMORY_ADDR_TLS_SLEB;
     case MCSymbolRefExpr::VK_WASM_MBREL:
Index: llvm/lib/Target/WebAssembly/WebAssemblyMCInstLower.cpp
===================================================================
--- llvm/lib/Target/WebAssembly/WebAssemblyMCInstLower.cpp
+++ llvm/lib/Target/WebAssembly/WebAssemblyMCInstLower.cpp
@@ -86,9 +86,8 @@
         strcmp(Name, "__stack_pointer") == 0 || strcmp(Name, "__tls_base") == 0;
     WasmSym->setType(wasm::WASM_SYMBOL_TYPE_GLOBAL);
     WasmSym->setGlobalType(wasm::WasmGlobalType{
-        uint8_t(Subtarget.hasAddr64() && strcmp(Name, "__table_base") != 0
-                    ? wasm::WASM_TYPE_I64
-                    : wasm::WASM_TYPE_I32),
+        uint8_t(Subtarget.hasAddr64() ? wasm::WASM_TYPE_I64
+                                      : wasm::WASM_TYPE_I32),
         Mutable});
     return WasmSym;
   }
Index: llvm/test/MC/WebAssembly/reloc-pic64.s
===================================================================
--- /dev/null
+++ llvm/test/MC/WebAssembly/reloc-pic64.s
@@ -0,0 +1,209 @@
+# RUN: llvm-mc -triple=wasm64-unknown-unknown -filetype=obj < %s | obj2yaml | FileCheck %s
+# RUN: llvm-mc -triple=wasm64-unknown-unknown -mattr=+reference-types -filetype=obj < %s | obj2yaml | FileCheck --check-prefix=REF %s
+
+# Verify that @GOT relocation entries result in R_WASM_GLOBAL_INDEX_LEB against
+# against the corrsponding function or data symbol and that the corresponding
+# data symbols are imported as a wasm globals.
+
+load_default_data:
+    .functype   load_default_data () -> (i32)
+    global.get  default_data@GOT
+    i32.load    0
+    end_function
+
+load_default_func:
+    .functype   load_default_func () -> (i32)
+    global.get  default_func@GOT
+    i32.load    0
+    end_function
+
+load_hidden_data:
+    .functype   load_hidden_data () -> (i64)
+    global.get  __memory_base
+    i64.const   .L.hidden_data@MBREL
+    i64.add
+    end_function
+
+load_hidden_func:
+    .functype   load_hidden_func () -> (i64)
+    global.get  __table_base
+    i64.const   hidden_func@TBREL
+    i64.add
+    end_function
+
+hidden_func:
+    .functype   hidden_func () -> (i32)
+    i32.const 0
+    end_function
+
+.section .rodata.hidden_data,"",@
+.L.hidden_data:
+    .int8 100
+    .size .L.hidden_data, 1
+
+#.hidden hidden_func
+#.hidden hidden_data
+.size default_data, 4
+.functype default_func () -> (i32)
+
+# CHECK:      --- !WASM
+# CHECK-NEXT: FileHeader:
+# CHECK-NEXT:   Version:         0x1
+# CHECK-NEXT: Sections:
+# CHECK-NEXT:   - Type:            TYPE
+# CHECK-NEXT:     Signatures:
+# CHECK-NEXT:       - Index:           0
+# CHECK-NEXT:         ParamTypes:      []
+# CHECK-NEXT:         ReturnTypes:
+# CHECK-NEXT:           - I32
+# CHECK-NEXT:       - Index:           1
+# CHECK-NEXT:         ParamTypes:      []
+# CHECK-NEXT:         ReturnTypes:
+# CHECK-NEXT:           - I64
+# CHECK-NEXT:   - Type:            IMPORT
+# CHECK-NEXT:     Imports:
+# CHECK-NEXT:       - Module:          env
+# CHECK-NEXT:         Field:           __linear_memory
+# CHECK-NEXT:         Kind:            MEMORY
+# CHECK-NEXT:         Memory:
+# CHECK-NEXT:           Flags:           [ IS_64 ]
+# CHECK-NEXT:           Minimum:         0x1
+# CHECK-NEXT:       - Module:          env
+# CHECK-NEXT:         Field:           default_func
+# CHECK-NEXT:         Kind:            FUNCTION
+# CHECK-NEXT:         SigIndex:        0
+# CHECK-NEXT:       - Module:          env
+# CHECK-NEXT:         Field:           __indirect_function_table
+# CHECK-NEXT:         Kind:            TABLE
+# CHECK-NEXT:         Table:
+# CHECK-NEXT:           Index:           0
+# CHECK-NEXT:           ElemType:        FUNCREF
+# CHECK-NEXT:           Limits:
+# CHECK-NEXT:             Minimum:         0x1
+# CHECK-NEXT:       - Module:          GOT.mem
+# CHECK-NEXT:         Field:           default_data
+# CHECK-NEXT:         Kind:            GLOBAL
+# CHECK-NEXT:         GlobalType:      I32
+# CHECK-NEXT:         GlobalMutable:   true
+# CHECK-NEXT:       - Module:          GOT.func
+# CHECK-NEXT:         Field:           default_func
+# CHECK-NEXT:         Kind:            GLOBAL
+# CHECK-NEXT:         GlobalType:      I32
+# CHECK-NEXT:         GlobalMutable:   true
+# CHECK-NEXT:   - Type:            FUNCTION
+# CHECK-NEXT:     FunctionTypes:   [ 0, 0, 1, 1, 0 ]
+# CHECK-NEXT:   - Type:            ELEM
+# CHECK-NEXT:     Segments:
+# CHECK-NEXT:        Offset:
+# CHECK-NEXT:          Opcode:          I32_CONST
+# CHECK-NEXT:          Value:           1
+# CHECK-NEXT:        Functions:       [ 5 ]
+# CHECK-NEXT:   - Type:            DATACOUNT
+# CHECK-NEXT:     Count:           1
+# CHECK-NEXT:   - Type:            CODE
+# CHECK-NEXT:     Relocations:
+# CHECK-NEXT:       - Type:            R_WASM_GLOBAL_INDEX_LEB
+# CHECK-NEXT:         Index:           1
+# CHECK-NEXT:         Offset:          0x4
+# CHECK-NEXT:       - Type:            R_WASM_GLOBAL_INDEX_LEB
+# CHECK-NEXT:         Index:           3
+# CHECK-NEXT:         Offset:          0x10
+# CHECK-NEXT:       - Type:            R_WASM_MEMORY_ADDR_LEB
+# CHECK-NEXT:         Index:           5
+# CHECK-NEXT:         Offset:          0x1C
+# CHECK-NEXT:       - Type:            R_WASM_MEMORY_ADDR_REL_SLEB
+# CHECK-NEXT:         Index:           6
+# CHECK-NEXT:         Offset:          0x22
+# CHECK-NEXT:       - Type:            R_WASM_MEMORY_ADDR_LEB
+# CHECK-NEXT:         Index:           8
+# CHECK-NEXT:         Offset:          0x31
+# CHECK-NEXT:       - Type:            R_WASM_TABLE_INDEX_REL_SLEB
+# CHECK-NEXT:         Index:           9
+# CHECK-NEXT:         Offset:          0x37
+# CHECK-NEXT:     Functions:
+# CHECK-NEXT:       - Index:           1
+# CHECK-NEXT:         Locals:          []
+# CHECK-NEXT:         Body:            2380808080002802000B
+# CHECK-NEXT:       - Index:           2
+# CHECK-NEXT:         Locals:          []
+# CHECK-NEXT:         Body:            2381808080002802000B
+# CHECK-NEXT:       - Index:           3
+# CHECK-NEXT:         Locals:          []
+# CHECK-NEXT:         Body:            23808080800042808080808080808080007C0B
+# CHECK-NEXT:       - Index:           4
+# CHECK-NEXT:         Locals:          []
+# CHECK-NEXT:         Body:            23808080800042808080808080808080007C0B
+# CHECK-NEXT:       - Index:           5
+# CHECK-NEXT:         Locals:          []
+# CHECK-NEXT:         Body:            41000B
+# CHECK-NEXT:   - Type:            DATA
+# CHECK-NEXT:     Segments:
+# CHECK-NEXT:       - SectionOffset:   6
+# CHECK-NEXT:         InitFlags:       0
+# CHECK-NEXT:         Offset:
+# CHECK-NEXT:           Opcode:          I64_CONST
+# CHECK-NEXT:           Value:           0
+# CHECK-NEXT:         Content:         '64'
+# CHECK-NEXT:   - Type:            CUSTOM
+# CHECK-NEXT:     Name:            linking
+# CHECK-NEXT:     Version:         2
+# CHECK-NEXT:     SymbolTable:
+# CHECK-NEXT:       - Index:           0
+# CHECK-NEXT:         Kind:            FUNCTION
+# CHECK-NEXT:         Name:            load_default_data
+# CHECK-NEXT:         Flags:           [ BINDING_LOCAL ]
+# CHECK-NEXT:         Function:        1
+# CHECK-NEXT:       - Index:           1
+# CHECK-NEXT:         Kind:            DATA
+# CHECK-NEXT:         Name:            default_data
+# CHECK-NEXT:         Flags:           [ UNDEFINED ]
+# CHECK-NEXT:       - Index:           2
+# CHECK-NEXT:         Kind:            FUNCTION
+# CHECK-NEXT:         Name:            load_default_func
+# CHECK-NEXT:         Flags:           [ BINDING_LOCAL ]
+# CHECK-NEXT:         Function:        2
+# CHECK-NEXT:       - Index:           3
+# CHECK-NEXT:         Kind:            FUNCTION
+# CHECK-NEXT:         Name:            default_func
+# CHECK-NEXT:         Flags:           [ UNDEFINED ]
+# CHECK-NEXT:         Function:        0
+# CHECK-NEXT:       - Index:           4
+# CHECK-NEXT:         Kind:            FUNCTION
+# CHECK-NEXT:         Name:            load_hidden_data
+# CHECK-NEXT:         Flags:           [ BINDING_LOCAL ]
+# CHECK-NEXT:         Function:        3
+# CHECK-NEXT:       - Index:           5
+# CHECK-NEXT:         Kind:            DATA
+# CHECK-NEXT:         Name:            __memory_base
+# CHECK-NEXT:         Flags:           [ UNDEFINED ]
+# CHECK-NEXT:       - Index:           6
+# CHECK-NEXT:         Kind:            DATA
+# CHECK-NEXT:         Name:            .L.hidden_data
+# CHECK-NEXT:         Flags:           [ BINDING_LOCAL ]
+# CHECK-NEXT:         Segment:         0
+# CHECK-NEXT:         Size:            1
+# CHECK-NEXT:       - Index:           7
+# CHECK-NEXT:         Kind:            FUNCTION
+# CHECK-NEXT:         Name:            load_hidden_func
+# CHECK-NEXT:         Flags:           [ BINDING_LOCAL ]
+# CHECK-NEXT:         Function:        4
+# CHECK-NEXT:       - Index:           8
+# CHECK-NEXT:         Kind:            DATA
+# CHECK-NEXT:         Name:            __table_base
+# CHECK-NEXT:         Flags:           [ UNDEFINED ]
+# CHECK-NEXT:       - Index:           9
+# CHECK-NEXT:         Kind:            FUNCTION
+# CHECK-NEXT:         Name:            hidden_func
+# CHECK-NEXT:         Flags:           [ BINDING_LOCAL ]
+# CHECK-NEXT:         Function:        5
+# REF:              - Index:           10
+# REF-NEXT:           Kind:            TABLE
+# REF-NEXT:           Name:            __indirect_function_table
+# REF-NEXT:           Flags:           [ UNDEFINED, NO_STRIP ]
+# REF-NEXT:           Table:           0
+# CHECK-NEXT:     SegmentInfo:
+# CHECK-NEXT:       - Index:           0
+# CHECK-NEXT:         Name:            .rodata.hidden_data
+# CHECK-NEXT:         Alignment:       0
+# CHECK-NEXT:         Flags:           [  ]
+# CHECK-NEXT: ...