diff --git a/llvm/lib/ObjectYAML/ELFEmitter.cpp b/llvm/lib/ObjectYAML/ELFEmitter.cpp
index 4584e3d..c394763 100644
--- a/llvm/lib/ObjectYAML/ELFEmitter.cpp
+++ b/llvm/lib/ObjectYAML/ELFEmitter.cpp
@@ -19,6 +19,7 @@
 #include "llvm/ObjectYAML/ELFYAML.h"
 #include "llvm/ObjectYAML/yaml2obj.h"
 #include "llvm/Support/EndianStream.h"
+#include "llvm/Support/LEB128.h"
 #include "llvm/Support/MemoryBuffer.h"
 #include "llvm/Support/WithColor.h"
 #include "llvm/Support/YAMLTraits.h"
@@ -167,6 +168,9 @@
   void writeSectionContent(Elf_Shdr &SHeader,
                            const ELFYAML::DynamicSection &Section,
                            ContiguousBlobAccumulator &CBA);
+  void writeSectionContent(Elf_Shdr &SHeader,
+                           const ELFYAML::StackSizesSection &Section,
+                           ContiguousBlobAccumulator &CBA);
   ELFState(ELFYAML::Object &D, yaml::ErrorHandler EH);
 
 public:
@@ -411,6 +415,8 @@
       writeSectionContent(SHeader, *S, CBA);
     } else if (auto S = dyn_cast<ELFYAML::VerdefSection>(Sec)) {
       writeSectionContent(SHeader, *S, CBA);
+    } else if (auto S = dyn_cast<ELFYAML::StackSizesSection>(Sec)) {
+      writeSectionContent(SHeader, *S, CBA);  
     } else {
       llvm_unreachable("Unknown section type");
     }
@@ -782,6 +788,26 @@
 }
 
 template <class ELFT>
+void ELFState<ELFT>::writeSectionContent(
+    Elf_Shdr &SHeader, const ELFYAML::StackSizesSection &Section,
+    ContiguousBlobAccumulator &CBA) {
+  using uintX_t = typename ELFT::uint;
+  raw_ostream &OS =
+      CBA.getOSAndAlignedOffset(SHeader.sh_offset, SHeader.sh_addralign);
+
+  if (Section.Content) {
+    Section.Content->writeAsBinary(OS);
+    SHeader.sh_size = Section.Content->binary_size();
+    return;
+  }
+
+  for (const ELFYAML::StackSizeEntry &E : *Section.Entries) {
+    support::endian::write<uintX_t>(OS, E.Address, ELFT::TargetEndianness);
+    SHeader.sh_size += sizeof(uintX_t) + encodeULEB128(E.Size, OS);
+  }
+}
+
+template <class ELFT>
 void ELFState<ELFT>::writeSectionContent(Elf_Shdr &SHeader,
                                          const ELFYAML::VerdefSection &Section,
                                          ContiguousBlobAccumulator &CBA) {