Index: ELF/LinkerScript.h
===================================================================
--- ELF/LinkerScript.h
+++ ELF/LinkerScript.h
@@ -123,6 +123,8 @@
 
   bool HasContents = false;
 
+  bool ManualHeadersSize = false;
+
   llvm::BumpPtrAllocator Alloc;
 
   // List of section patterns specified with KEEP commands. They will
@@ -150,6 +152,7 @@
   void addScriptedSymbols();
   bool hasPhdrsCommands();
   uintX_t getOutputSectionSize(StringRef Name);
+  uintX_t getSizeOfHeaders();
 
 private:
   std::vector<std::pair<StringRef, const InputSectionDescription *>>
Index: ELF/LinkerScript.cpp
===================================================================
--- ELF/LinkerScript.cpp
+++ ELF/LinkerScript.cpp
@@ -239,7 +239,7 @@
   }
 
   // Assign addresses as instructed by linker script SECTIONS sub-commands.
-  Dot = Out<ELFT>::ElfHeader->getSize() + Out<ELFT>::ProgramHeaders->getSize();
+  Dot = Opt.ManualHeadersSize ? 0 : getSizeOfHeaders();
   uintX_t MinVA = std::numeric_limits<uintX_t>::max();
   uintX_t ThreadBssOffset = 0;
 
@@ -431,6 +431,11 @@
   return 0;
 }
 
+template <class ELFT>
+typename ELFT::uint LinkerScript<ELFT>::getSizeOfHeaders() {
+  return Out<ELFT>::ElfHeader->getSize() + Out<ELFT>::ProgramHeaders->getSize();
+}
+
 // Returns indices of ELF headers containing specific section, identified
 // by Name. Each index is a zero based number of ELF header listed within
 // PHDRS {} script block.
@@ -933,6 +938,22 @@
   return 0;
 }
 
+static uint64_t getSizeOfHeaders() {
+  switch (Config->EKind) {
+  case ELF32LEKind:
+    return Script<ELF32LE>::X->getSizeOfHeaders();
+  case ELF32BEKind:
+    return Script<ELF32BE>::X->getSizeOfHeaders();
+  case ELF64LEKind:
+    return Script<ELF64LE>::X->getSizeOfHeaders();
+  case ELF64BEKind:
+    return Script<ELF64BE>::X->getSizeOfHeaders();
+  default:
+    llvm_unreachable("unsupported target");
+  }
+  return 0;
+}
+
 SymbolAssignment *ScriptParser::readAssignment(StringRef Name) {
   StringRef Op = next();
   assert(Op == "=" || Op == "+=");
@@ -1047,6 +1068,10 @@
     expect(")");
     return [=](uint64_t Dot) { return getSectionSize(Name); };
   }
+  if (Tok == "SIZEOF_HEADERS") {
+    Opt.ManualHeadersSize = true;
+    return [=](uint64_t Dot) { return getSizeOfHeaders(); };
+  }
 
   // Parse a symbol name or a number literal.
   uint64_t V = 0;