diff --git a/llvm/include/llvm/BinaryFormat/ELFRelocs/RISCV.def b/llvm/include/llvm/BinaryFormat/ELFRelocs/RISCV.def
--- a/llvm/include/llvm/BinaryFormat/ELFRelocs/RISCV.def
+++ b/llvm/include/llvm/BinaryFormat/ELFRelocs/RISCV.def
@@ -54,3 +54,5 @@
 ELF_RELOC(R_RISCV_SET32,             56)
 ELF_RELOC(R_RISCV_32_PCREL,          57)
 ELF_RELOC(R_RISCV_IRELATIVE,         58)
+ELF_RELOC(R_RISCV_SET_ULEB128,       59)
+ELF_RELOC(R_RISCV_SUB_ULEB128,       60)
diff --git a/llvm/lib/Target/RISCV/MCTargetDesc/RISCVAsmBackend.cpp b/llvm/lib/Target/RISCV/MCTargetDesc/RISCVAsmBackend.cpp
--- a/llvm/lib/Target/RISCV/MCTargetDesc/RISCVAsmBackend.cpp
+++ b/llvm/lib/Target/RISCV/MCTargetDesc/RISCVAsmBackend.cpp
@@ -93,6 +93,9 @@
 
       {"fixup_riscv_set_6b", 2, 6, 0},
       {"fixup_riscv_sub_6b", 2, 6, 0},
+
+      {"fixup_riscv_set_uleb128", 0, 0, 0},
+      {"fixup_riscv_sub_uleb128", 0, 0, 0},
   };
   static_assert((std::size(Infos)) == RISCV::NumTargetFixupKinds,
                 "Not all fixup kinds added to Infos array");
@@ -381,6 +384,8 @@
   case RISCV::fixup_riscv_sub_32:
   case RISCV::fixup_riscv_add_64:
   case RISCV::fixup_riscv_sub_64:
+  case RISCV::fixup_riscv_set_uleb128:
+  case RISCV::fixup_riscv_sub_uleb128:
   case FK_Data_1:
   case FK_Data_2:
   case FK_Data_4:
diff --git a/llvm/lib/Target/RISCV/MCTargetDesc/RISCVELFObjectWriter.cpp b/llvm/lib/Target/RISCV/MCTargetDesc/RISCVELFObjectWriter.cpp
--- a/llvm/lib/Target/RISCV/MCTargetDesc/RISCVELFObjectWriter.cpp
+++ b/llvm/lib/Target/RISCV/MCTargetDesc/RISCVELFObjectWriter.cpp
@@ -166,6 +166,10 @@
     return ELF::R_RISCV_ADD64;
   case RISCV::fixup_riscv_sub_64:
     return ELF::R_RISCV_SUB64;
+  case RISCV::fixup_riscv_set_uleb128:
+    return ELF::R_RISCV_SET_ULEB128;
+  case RISCV::fixup_riscv_sub_uleb128:
+    return ELF::R_RISCV_SUB_ULEB128;
   }
 }
 
diff --git a/llvm/lib/Target/RISCV/MCTargetDesc/RISCVELFStreamer.h b/llvm/lib/Target/RISCV/MCTargetDesc/RISCVELFStreamer.h
--- a/llvm/lib/Target/RISCV/MCTargetDesc/RISCVELFStreamer.h
+++ b/llvm/lib/Target/RISCV/MCTargetDesc/RISCVELFStreamer.h
@@ -27,6 +27,7 @@
       : MCELFStreamer(C, std::move(MAB), std::move(MOW), std::move(MCE)) {}
 
   void emitValueImpl(const MCExpr *Value, unsigned Size, SMLoc Loc) override;
+  void emitULEB128Value(const MCExpr *Value) override;
 };
 
 namespace llvm {
diff --git a/llvm/lib/Target/RISCV/MCTargetDesc/RISCVELFStreamer.cpp b/llvm/lib/Target/RISCV/MCTargetDesc/RISCVELFStreamer.cpp
--- a/llvm/lib/Target/RISCV/MCTargetDesc/RISCVELFStreamer.cpp
+++ b/llvm/lib/Target/RISCV/MCTargetDesc/RISCVELFStreamer.cpp
@@ -272,6 +272,37 @@
   DF->getContents().resize(DF->getContents().size() + Size, 0);
 }
 
+void RISCVELFStreamer::emitULEB128Value(const MCExpr *Value) {
+  const MCExpr *A, *B;
+
+  if (!requiresFixups(getContext(), Value, A, B))
+    return MCELFStreamer::emitULEB128Value(Value);
+
+  SMLoc Loc = Value->getLoc();
+
+  int64_t IntValue;
+  if (!Value->evaluateAsAbsolute(IntValue, getAssemblerPtr())) {
+    // Emit a placeholder to make sure we'll emit enough space could be filled
+    // by linker later.
+    IntValue = -1ll;
+  }
+  MCDataFragment *DF = getOrCreateDataFragment();
+  flushPendingLabels(DF, DF->getContents().size());
+  MCDwarfLineEntry::make(this, getCurrentSectionOnly());
+
+  DF->getFixups().push_back(MCFixup::create(
+      DF->getContents().size(), A,
+      static_cast<MCFixupKind>(RISCV::fixup_riscv_set_uleb128), Loc));
+  DF->getFixups().push_back(MCFixup::create(
+      DF->getContents().size(), B,
+      static_cast<MCFixupKind>(RISCV::fixup_riscv_sub_uleb128), Loc));
+
+  SmallString<128> Tmp;
+  raw_svector_ostream OSE(Tmp);
+  encodeULEB128(IntValue, OSE);
+  emitBytes(OSE.str());
+}
+
 namespace llvm {
 MCELFStreamer *createRISCVELFStreamer(MCContext &C,
                                       std::unique_ptr<MCAsmBackend> MAB,
diff --git a/llvm/lib/Target/RISCV/MCTargetDesc/RISCVFixupKinds.h b/llvm/lib/Target/RISCV/MCTargetDesc/RISCVFixupKinds.h
--- a/llvm/lib/Target/RISCV/MCTargetDesc/RISCVFixupKinds.h
+++ b/llvm/lib/Target/RISCV/MCTargetDesc/RISCVFixupKinds.h
@@ -103,6 +103,10 @@
   // 6-bit fixup corresponding to R_RISCV_SUB6 for local label assignment in
   // DWARF CFA.
   fixup_riscv_sub_6b,
+  // fixup corresponding to R_RISCV_SET_ULEB128 for local label assignment.
+  fixup_riscv_set_uleb128,
+  // fixup corresponding to R_RISCV_SUB_ULEB128 for local label assignment.
+  fixup_riscv_sub_uleb128,
 
   // Used as a sentinel, must be the last
   fixup_riscv_invalid,
diff --git a/llvm/test/MC/RISCV/fixups-expr.s b/llvm/test/MC/RISCV/fixups-expr.s
--- a/llvm/test/MC/RISCV/fixups-expr.s
+++ b/llvm/test/MC/RISCV/fixups-expr.s
@@ -27,6 +27,8 @@
 .half G2-G1
 .byte .L2-.L1
 .byte G2-G1
+.uleb128 .L2-.L1
+.uleb128 G2-G1
 # RELAX: 0x0 R_RISCV_ADD64 .L2 0x0
 # RELAX: 0x0 R_RISCV_SUB64 .L1 0x0
 # RELAX: 0x8 R_RISCV_ADD64 G2 0x0
@@ -43,3 +45,7 @@
 # RELAX: 0x1C R_RISCV_SUB8 .L1 0x0
 # RELAX: 0x1D R_RISCV_ADD8 G2 0x0
 # RELAX: 0x1D R_RISCV_SUB8 G1 0x0
+# RELAX: 0x1E R_RISCV_SET_ULEB128 .L2 0x0
+# RELAX: 0x1E R_RISCV_SUB_ULEB128 .L1 0x0
+# RELAX: 0x1F R_RISCV_SET_ULEB128 G2 0x0
+# RELAX: 0x1F R_RISCV_SUB_ULEB128 G1 0x0