diff --git a/llvm/lib/Target/ARM/MCTargetDesc/ARMELFObjectWriter.cpp b/llvm/lib/Target/ARM/MCTargetDesc/ARMELFObjectWriter.cpp
index c7739b4..a821a6b 100644
--- a/llvm/lib/Target/ARM/MCTargetDesc/ARMELFObjectWriter.cpp
+++ b/llvm/lib/Target/ARM/MCTargetDesc/ARMELFObjectWriter.cpp
@@ -200,6 +200,9 @@
       case MCSymbolRefExpr::VK_ARM_PREL31:
         Type = ELF::R_ARM_PREL31;
         break;
+      case MCSymbolRefExpr::VK_ARM_SBREL:
+        Type = ELF::R_ARM_SBREL32;
+        break;
       case MCSymbolRefExpr::VK_ARM_TLSLDO:
         Type = ELF::R_ARM_TLS_LDO32;
         break;
diff --git a/llvm/lib/Target/ARM/MCTargetDesc/ARMELFStreamer.cpp b/llvm/lib/Target/ARM/MCTargetDesc/ARMELFStreamer.cpp
index f940306..99b5c62 100644
--- a/llvm/lib/Target/ARM/MCTargetDesc/ARMELFStreamer.cpp
+++ b/llvm/lib/Target/ARM/MCTargetDesc/ARMELFStreamer.cpp
@@ -553,6 +553,10 @@
   /// necessary.
   void EmitValueImpl(const MCExpr *Value, unsigned Size,
                      const SMLoc &Loc) override {
+    if (const MCSymbolRefExpr *SRE = dyn_cast_or_null<MCSymbolRefExpr>(Value))
+      if (SRE->getKind() == MCSymbolRefExpr::VK_ARM_SBREL && !(Size == 4))
+        getContext().FatalError(Loc, "relocated expression must be 32-bit");
+
     EmitDataMappingSymbol();
     MCELFStreamer::EmitValueImpl(Value, Size);
   }