Index: lld/trunk/test/wasm/global-base.test
===================================================================
--- lld/trunk/test/wasm/global-base.test
+++ lld/trunk/test/wasm/global-base.test
@@ -0,0 +1,71 @@
+RUN: llc -filetype=obj %p/Inputs/start.ll -o %t.o
+
+RUN: wasm-ld --export=__global_base --export=__data_end --allow-undefined -o %t.wasm %t.o
+RUN: obj2yaml %t.wasm | FileCheck %s  -check-prefix=CHECK-1024
+CHECK-1024:       - Type:            GLOBAL
+CHECK-1024-NEXT:    Globals:
+CHECK-1024-NEXT:      - Index:           0
+CHECK-1024-NEXT:        Type:            I32
+CHECK-1024-NEXT:        Mutable:         true
+CHECK-1024-NEXT:        InitExpr:
+CHECK-1024-NEXT:          Opcode:          I32_CONST
+CHECK-1024-NEXT:          Value:           66560
+CHECK-1024-NEXT:      - Index:           1
+CHECK-1024-NEXT:        Type:            I32
+CHECK-1024-NEXT:        Mutable:         false
+CHECK-1024-NEXT:        InitExpr:
+CHECK-1024-NEXT:          Opcode:          I32_CONST
+CHECK-1024-NEXT:          Value:           1024
+CHECK-1024-NEXT:      - Index:           2
+CHECK-1024-NEXT:        Type:            I32
+CHECK-1024-NEXT:        Mutable:         false
+CHECK-1024-NEXT:        InitExpr:
+CHECK-1024-NEXT:          Opcode:          I32_CONST
+CHECK-1024-NEXT:          Value:           1024
+
+CHECK-1024:       - Type:            EXPORT
+CHECK-1024-NEXT:    Exports:
+CHECK-1024-NEXT:      - Name:            memory
+CHECK-1024-NEXT:        Kind:            MEMORY
+CHECK-1024-NEXT:        Index:           0
+CHECK-1024-NEXT:      - Name:            __data_end
+CHECK-1024-NEXT:        Kind:            GLOBAL
+CHECK-1024-NEXT:        Index:           1
+CHECK-1024-NEXT:      - Name:            __global_base
+CHECK-1024-NEXT:        Kind:            GLOBAL
+CHECK-1024-NEXT:        Index:           2
+
+RUN: wasm-ld --export=__global_base --export=__data_end --allow-undefined --global-base=16777216 -o %t.wasm %t.o
+RUN: obj2yaml %t.wasm | FileCheck %s  -check-prefix=CHECK-16777216
+CHECK-16777216:       - Type:            GLOBAL
+CHECK-16777216-NEXT:    Globals:
+CHECK-16777216-NEXT:      - Index:           0
+CHECK-16777216-NEXT:        Type:            I32
+CHECK-16777216-NEXT:        Mutable:         true
+CHECK-16777216-NEXT:        InitExpr:
+CHECK-16777216-NEXT:          Opcode:          I32_CONST
+CHECK-16777216-NEXT:          Value:           16842752
+CHECK-16777216-NEXT:      - Index:           1
+CHECK-16777216-NEXT:        Type:            I32
+CHECK-16777216-NEXT:        Mutable:         false
+CHECK-16777216-NEXT:        InitExpr:
+CHECK-16777216-NEXT:          Opcode:          I32_CONST
+CHECK-16777216-NEXT:          Value:           16777216
+CHECK-16777216-NEXT:      - Index:           2
+CHECK-16777216-NEXT:        Type:            I32
+CHECK-16777216-NEXT:        Mutable:         false
+CHECK-16777216-NEXT:        InitExpr:
+CHECK-16777216-NEXT:          Opcode:          I32_CONST
+CHECK-16777216-NEXT:          Value:           16777216
+
+CHECK-16777216:       - Type:            EXPORT
+CHECK-16777216-NEXT:    Exports:
+CHECK-16777216-NEXT:      - Name:            memory
+CHECK-16777216-NEXT:        Kind:            MEMORY
+CHECK-16777216-NEXT:        Index:           0
+CHECK-16777216-NEXT:      - Name:            __data_end
+CHECK-16777216-NEXT:        Kind:            GLOBAL
+CHECK-16777216-NEXT:        Index:           1
+CHECK-16777216-NEXT:      - Name:            __global_base
+CHECK-16777216-NEXT:        Kind:            GLOBAL
+CHECK-16777216-NEXT:        Index:           2
Index: lld/trunk/wasm/Driver.cpp
===================================================================
--- lld/trunk/wasm/Driver.cpp
+++ lld/trunk/wasm/Driver.cpp
@@ -490,6 +490,7 @@
     WasmSym::StackPointer = Symtab->addSyntheticGlobal(
         "__stack_pointer", WASM_SYMBOL_VISIBILITY_HIDDEN, StackPointer);
     WasmSym::DataEnd = Symtab->addOptionalDataSymbol("__data_end");
+    WasmSym::GlobalBase = Symtab->addOptionalDataSymbol("__global_base");
     WasmSym::HeapBase = Symtab->addOptionalDataSymbol("__heap_base");
   }
 
Index: lld/trunk/wasm/Symbols.h
===================================================================
--- lld/trunk/wasm/Symbols.h
+++ lld/trunk/wasm/Symbols.h
@@ -415,6 +415,10 @@
 
 // linker-generated symbols
 struct WasmSym {
+  // __global_base
+  // Symbol marking the start of the global section.
+  static DefinedData *GlobalBase;
+
   // __stack_pointer
   // Global that holds the address of the top of the explicit value stack in
   // linear memory.
Index: lld/trunk/wasm/Symbols.cpp
===================================================================
--- lld/trunk/wasm/Symbols.cpp
+++ lld/trunk/wasm/Symbols.cpp
@@ -28,6 +28,7 @@
 DefinedFunction *WasmSym::ApplyRelocs;
 DefinedData *WasmSym::DsoHandle;
 DefinedData *WasmSym::DataEnd;
+DefinedData *WasmSym::GlobalBase;
 DefinedData *WasmSym::HeapBase;
 GlobalSymbol *WasmSym::StackPointer;
 UndefinedGlobal *WasmSym::TableBase;
Index: lld/trunk/wasm/Writer.cpp
===================================================================
--- lld/trunk/wasm/Writer.cpp
+++ lld/trunk/wasm/Writer.cpp
@@ -224,6 +224,9 @@
     log("mem: global base = " + Twine(Config->GlobalBase));
   }
 
+  if (WasmSym::GlobalBase)
+    WasmSym::GlobalBase->setVirtualAddress(Config->GlobalBase);
+
   uint32_t DataStart = MemoryPtr;
 
   // Arbitrarily set __dso_handle handle to point to the start of the data