Load the global proxy from the context of the target function.

src/arm/builtins-arm.cc

Index: src/arm/builtins-arm.cc
diff --git a/src/arm/builtins-arm.cc b/src/arm/builtins-arm.cc
index 5a47ef44c0d93b40935528d5097cdef83511b180..6c374b3914330fc0d15075e103fbefd1eb8d13c0 100644
--- a/src/arm/builtins-arm.cc
+++ b/src/arm/builtins-arm.cc
@@ -34,6 +34,7 @@
 #include "deoptimizer.h"
 #include "full-codegen.h"
 #include "runtime.h"
+#include "stub-cache.h"
 
 namespace v8 {
 namespace internal {
@@ -1091,12 +1092,8 @@ void Builtins::Generate_FunctionCall(MacroAssembler* masm) {
     // Use the global receiver object from the called function as the
     // receiver.
     __ bind(&use_global_receiver);
-    const int kGlobalIndex =
-        Context::kHeaderSize + Context::GLOBAL_OBJECT_INDEX * kPointerSize;
-    __ ldr(r2, FieldMemOperand(cp, kGlobalIndex));
-    __ ldr(r2, FieldMemOperand(r2, GlobalObject::kNativeContextOffset));
-    __ ldr(r2, FieldMemOperand(r2, kGlobalIndex));
-    __ ldr(r2, FieldMemOperand(r2, GlobalObject::kGlobalReceiverOffset));
+  __ ldr(r2, ContextOperand(cp, Context::GLOBAL_OBJECT_INDEX));
+  __ ldr(r2, FieldMemOperand(r2, GlobalObject::kGlobalReceiverOffset));
 
     __ bind(&patch_receiver);
     __ add(r3, sp, Operand(r0, LSL, kPointerSizeLog2));
@@ -1287,11 +1284,7 @@ void Builtins::Generate_FunctionApply(MacroAssembler* masm) {
 
     // Use the current global receiver object as the receiver.
     __ bind(&use_global_receiver);
-    const int kGlobalOffset =
-        Context::kHeaderSize + Context::GLOBAL_OBJECT_INDEX * kPointerSize;
-    __ ldr(r0, FieldMemOperand(cp, kGlobalOffset));
-    __ ldr(r0, FieldMemOperand(r0, GlobalObject::kNativeContextOffset));
-    __ ldr(r0, FieldMemOperand(r0, kGlobalOffset));
+    __ ldr(r0, ContextOperand(cp, Context::GLOBAL_OBJECT_INDEX));
     __ ldr(r0, FieldMemOperand(r0, GlobalObject::kGlobalReceiverOffset));
 
     // Push the receiver.