Index: ELF/Config.h
===================================================================
--- ELF/Config.h
+++ ELF/Config.h
@@ -20,6 +20,8 @@
 struct Configuration {
   llvm::StringRef DynamicLinker;
   llvm::StringRef Entry;
+  llvm::StringRef Fini = "_fini";
+  llvm::StringRef Init = "_init";
   llvm::StringRef OutputFile = "a.out";
   llvm::StringRef SoName;
   llvm::StringRef Sysroot;
Index: ELF/Driver.cpp
===================================================================
--- ELF/Driver.cpp
+++ ELF/Driver.cpp
@@ -117,6 +117,12 @@
   if (auto *Arg = Args.getLastArg(OPT_entry))
     Config->Entry = Arg->getValue();
 
+  if (auto *Arg = Args.getLastArg(OPT_fini))
+    Config->Fini = Arg->getValue();
+
+  if (auto *Arg = Args.getLastArg(OPT_init))
+    Config->Init = Arg->getValue();
+
   if (auto *Arg = Args.getLastArg(OPT_soname))
     Config->SoName = Arg->getValue();
 
Index: ELF/Options.td
===================================================================
--- ELF/Options.td
+++ ELF/Options.td
@@ -32,6 +32,12 @@
 def export_dynamic : Flag<["--", "-"], "export-dynamic">,
   HelpText<"Put symbols in the dynamic symbol table">;
 
+def fini : Separate<["-"], "fini">, MetaVarName<"<symbol>">,
+  HelpText<"Specify a finalizer function">;
+
+def init : Separate<["-"], "init">, MetaVarName<"<symdol>">,
+  HelpText<"Specify an initializer function">;
+
 def l : Joined<["-"], "l">, MetaVarName<"<libName>">,
   HelpText<"Root name of library to use">;
 
@@ -74,6 +80,8 @@
 def alias_discard_all: Flag<["-"], "x">, Alias<discard_all>;
 def alias_discard_locals: Flag<["-"], "X">, Alias<discard_locals>;
 def alias_entry : Separate<["-"], "e">, Alias<entry>;
+def alias_fini : Joined<["-"], "fini=">, Alias<fini>;
+def alias_init : Joined<["-"], "init=">, Alias<init>;
 def alias_l : Joined<["--"], "library=">, Alias<l>;
 def alias_soname : Separate<["-"], "h">, Alias<soname>;
 
Index: ELF/OutputSections.h
===================================================================
--- ELF/OutputSections.h
+++ ELF/OutputSections.h
@@ -319,7 +319,8 @@
 
 public:
   DynamicSection(SymbolTable &SymTab, HashTableSection<ELFT> &HashSec,
-                 RelocationSection<ELFT> &RelaDynSec);
+                 RelocationSection<ELFT> &RelaDynSec,
+                 const OutputSection<ELFT> &BssSec);
   void finalize() override;
   void writeTo(uint8_t *Buf) override;
 
@@ -328,7 +329,10 @@
   SymbolTableSection<ELFT> &DynSymSec;
   StringTableSection<ELFT::Is64Bits> &DynStrSec;
   RelocationSection<ELFT> &RelaDynSec;
+  const OutputSection<ELFT> &BssSec;
   SymbolTable &SymTab;
+  const ELFSymbolBody<ELFT> *InitSymbolBody = nullptr;
+  const ELFSymbolBody<ELFT> *FiniSymbolBody = nullptr;
 };
 }
 }
Index: ELF/OutputSections.cpp
===================================================================
--- ELF/OutputSections.cpp
+++ ELF/OutputSections.cpp
@@ -170,13 +170,14 @@
 template <class ELFT>
 DynamicSection<ELFT>::DynamicSection(SymbolTable &SymTab,
                                      HashTableSection<ELFT> &HashSec,
-                                     RelocationSection<ELFT> &RelaDynSec)
+                                     RelocationSection<ELFT> &RelaDynSec,
+                                     const OutputSection<ELFT> &BssSec)
     : OutputSectionBase<ELFT::Is64Bits>(".dynamic", llvm::ELF::SHT_DYNAMIC,
                                         llvm::ELF::SHF_ALLOC |
                                             llvm::ELF::SHF_WRITE),
       HashSec(HashSec), DynSymSec(HashSec.getDynSymSec()),
       DynStrSec(DynSymSec.getStrTabSec()), RelaDynSec(RelaDynSec),
-      SymTab(SymTab) {
+      BssSec(BssSec), SymTab(SymTab) {
   typename Base::HeaderT &Header = this->Header;
   Header.sh_addralign = ELFT::Is64Bits ? 8 : 4;
   Header.sh_entsize = ELFT::Is64Bits ? 16 : 8;
@@ -217,6 +218,18 @@
     DynStrSec.add(File->getSoName());
   NumEntries += SharedFiles.size();
 
+  auto LookupForBody = [&](StringRef Name) {
+    ELFSymbolBody<ELFT> *Body = nullptr;
+    if (Symbol *Sym = SymTab.getSymbols().lookup(Name))
+      Body = dyn_cast<ELFSymbolBody<ELFT>>(Sym->Body);
+    return Body;
+  };
+
+  if ((InitSymbolBody = LookupForBody(Config->Init)))
+    ++NumEntries; // DT_INIT
+  if ((FiniSymbolBody = LookupForBody(Config->Fini)))
+    ++NumEntries; // DT_FINI
+
   ++NumEntries; // DT_NULL
 
   Header.sh_size = NumEntries * Header.sh_entsize;
@@ -264,6 +277,11 @@
   for (const std::unique_ptr<SharedFileBase> &File : SharedFiles)
     WriteVal(DT_NEEDED, DynStrSec.getFileOff(File->getSoName()));
 
+  if (InitSymbolBody)
+    WritePtr(DT_INIT, getSymVA(*InitSymbolBody, BssSec));
+  if (FiniSymbolBody)
+    WritePtr(DT_FINI, getSymVA(*FiniSymbolBody, BssSec));
+
   WriteVal(DT_NULL, 0);
 }
 
Index: ELF/Writer.cpp
===================================================================
--- ELF/Writer.cpp
+++ ELF/Writer.cpp
@@ -99,7 +99,7 @@
   Writer(SymbolTable *T)
       : SymTabSec(*T, StrTabSec, BssSec), DynSymSec(*T, DynStrSec, BssSec),
         RelaDynSec(DynSymSec, GotSec, T->shouldUseRela()), PltSec(GotSec),
-        HashSec(DynSymSec), DynamicSec(*T, HashSec, RelaDynSec),
+        HashSec(DynSymSec), DynamicSec(*T, HashSec, RelaDynSec, BssSec),
         BssSec(PltSec, GotSec, BssSec, ".bss", SHT_NOBITS,
                SHF_ALLOC | SHF_WRITE) {}
   void run();
Index: test/elf2/init-fini.s
===================================================================
--- /dev/null
+++ test/elf2/init-fini.s
@@ -0,0 +1,31 @@
+// REQUIRES: x86
+// RUN: llvm-mc -filetype=obj -triple=x86_64-unknown-linux %s -o %t
+
+// Should use "_init" and "_fini" by default when fills dynamic table
+// RUN: lld -flavor gnu2 -shared %t -o %t2
+// RUN: llvm-readobj -dynamic-table %t2 | FileCheck --check-prefix=BYDEF %s
+// BYDEF: INIT 0x11010
+// BYDEF: FINI 0x11020
+
+// -init and -fini override symbols to use
+// RUN: lld -flavor gnu2 -shared %t -o %t2 -init _foo -fini _bar
+// RUN: llvm-readobj -dynamic-table %t2 | FileCheck --check-prefix=OVR %s
+// OVR: INIT 0x11030
+// OVR: FINI 0x11040
+
+// Check aliases as well
+// RUN: lld -flavor gnu2 -shared %t -o %t2 -init=_foo -fini=_bar
+// RUN: llvm-readobj -dynamic-table %t2 | FileCheck --check-prefix=OVR %s
+
+// Should not add the dynamic table entry if the symbol is undefined
+// RUN: lld -flavor gnu2 -shared %t -o %t2 -init=_undefined -fini=_undefined
+// RUN: llvm-readobj -dynamic-table %t2 | FileCheck --check-prefix=NOENTRY %s
+// NOENTRY-NOT: INIT
+// NOENTRY-NOT: FINI
+
+.global _start,_init,_fini,_foo,_bar;
+_start:
+_init = 0x11010
+_fini = 0x11020
+_foo  = 0x11030
+_bar  = 0x11040