Add s390 backend.

elfcpp/
	* s390.h: New file.

gold/
	* s390.cc: New file.
	* Makefile.am (TARGETSOURCES): Add s390.cc.
	(ALL_TARGETOBJS): Add s390.o.
	* Makefile.in: Regenerate.
	* configure.ac: Add s390 support.
	* configure: Regenerate.
	* configure.tgt: Add s390-*-* and s390x-*-*.
	* testsuite/icf_safe_test.sh (arch_specific_safe_fold): Add s390
	support.

1 files changed, 4327 insertions, 0 deletions

diff --git a/gold/s390.cc b/gold/s390.cc
new file mode 100644
index 00000000000..020fb15c973
--- /dev/null
+++ b/gold/s390.cc
@@ -0,0 +1,4327 @@
+// s390.cc -- s390 target support for gold.
+
+// Copyright (C) 2015 Free Software Foundation, Inc.
+// Written by Marcin Kościelnicki <koriakin@0x04.net>.
+
+// This file is part of gold.
+
+// This program is free software; you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation; either version 3 of the License, or
+// (at your option) any later version.
+
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+
+// You should have received a copy of the GNU General Public License
+// along with this program; if not, write to the Free Software
+// Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
+// MA 02110-1301, USA.
+
+#include "gold.h"
+
+#include <cstring>
+
+#include "elfcpp.h"
+#include "dwarf.h"
+#include "parameters.h"
+#include "reloc.h"
+#include "s390.h"
+#include "object.h"
+#include "symtab.h"
+#include "layout.h"
+#include "output.h"
+#include "copy-relocs.h"
+#include "target.h"
+#include "target-reloc.h"
+#include "target-select.h"
+#include "tls.h"
+#include "gc.h"
+#include "icf.h"
+
+namespace
+{
+
+using namespace gold;
+
+// A class to handle the .got.plt section.
+
+template<int size>
+class Output_data_got_plt_s390 : public Output_section_data_build
+{
+ public:
+  Output_data_got_plt_s390(Layout* layout)
+    : Output_section_data_build(size/8),
+      layout_(layout)
+  { }
+
+  Output_data_got_plt_s390(Layout* layout, off_t data_size)
+    : Output_section_data_build(data_size, size/8),
+      layout_(layout)
+  { }
+
+ protected:
+  // Write out the PLT data.
+  void
+  do_write(Output_file*);
+
+  // Write to a map file.
+  void
+  do_print_to_mapfile(Mapfile* mapfile) const
+  { mapfile->print_output_data(this, "** GOT PLT"); }
+
+ private:
+  // A pointer to the Layout class, so that we can find the .dynamic
+  // section when we write out the GOT PLT section.
+  Layout* layout_;
+};
+
+// A class to handle the PLT data.
+
+template<int size>
+class Output_data_plt_s390 : public Output_section_data
+{
+ public:
+  typedef Output_data_reloc<elfcpp::SHT_RELA, true, size, true>
+    Reloc_section;
+
+  Output_data_plt_s390(Layout* layout,
+                         Output_data_got<size, true>* got,
+                         Output_data_got_plt_s390<size>* got_plt,
+                         Output_data_space* got_irelative)
+    : Output_section_data(4), layout_(layout),
+      irelative_rel_(NULL), got_(got), got_plt_(got_plt),
+      got_irelative_(got_irelative), count_(0),
+      irelative_count_(0), free_list_()
+  { this->init(layout); }
+
+  Output_data_plt_s390(Layout* layout,
+                         Output_data_got<size, true>* got,
+                         Output_data_got_plt_s390<size>* got_plt,
+                         Output_data_space* got_irelative,
+                         unsigned int plt_count)
+    : Output_section_data((plt_count + 1) * plt_entry_size,
+                          4, false),
+      layout_(layout), irelative_rel_(NULL), got_(got),
+      got_plt_(got_plt), got_irelative_(got_irelative), count_(plt_count),
+      irelative_count_(0), free_list_()
+  {
+    this->init(layout);
+
+    // Initialize the free list and reserve the first entry.
+    this->free_list_.init((plt_count + 1) * plt_entry_size, false);
+    this->free_list_.remove(0, plt_entry_size);
+  }
+
+  // Initialize the PLT section.
+  void
+  init(Layout* layout);
+
+  // Add an entry to the PLT.
+  void
+  add_entry(Symbol_table*, Layout*, Symbol* gsym);
+
+  // Add an entry to the PLT for a local STT_GNU_IFUNC symbol.
+  unsigned int
+  add_local_ifunc_entry(Symbol_table*, Layout*,
+    Sized_relobj_file<size, true>*, unsigned int);
+
+  // Add the relocation for a PLT entry.
+  void
+  add_relocation(Symbol_table*, Layout*, Symbol*, unsigned int);
+
+  // Return the .rela.plt section data.
+  Reloc_section*
+  rela_plt()
+  { return this->rel_; }
+
+  // Return where the IRELATIVE relocations should go in the PLT
+  // relocations.
+  Reloc_section*
+  rela_irelative(Symbol_table*, Layout*);
+
+  // Return whether we created a section for IRELATIVE relocations.
+  bool
+  has_irelative_section() const
+  { return this->irelative_rel_ != NULL; }
+
+  // Return the number of PLT entries.
+  unsigned int
+  entry_count() const
+  { return this->count_ + this->irelative_count_; }
+
+  // Return the offset of the first non-reserved PLT entry.
+  unsigned int
+  first_plt_entry_offset()
+  { return plt_entry_size; }
+
+  // Return the size of a PLT entry.
+  unsigned int
+  get_plt_entry_size() const
+  { return plt_entry_size; }
+
+  // Reserve a slot in the PLT for an existing symbol in an incremental update.
+  void
+  reserve_slot(unsigned int plt_index)
+  {
+    this->free_list_.remove((plt_index + 1) * plt_entry_size,
+                            (plt_index + 2) * plt_entry_size);
+  }
+
+  // Return the PLT address to use for a global symbol.
+  uint64_t
+  address_for_global(const Symbol*);
+
+  // Return the PLT address to use for a local symbol.
+  uint64_t
+  address_for_local(const Relobj*, unsigned int symndx);
+
+  // Add .eh_frame information for the PLT.
+  void
+  add_eh_frame(Layout* layout)
+  {
+	  (void)layout;
+    layout->add_eh_frame_for_plt(this,
+				 plt_eh_frame_cie,
+				 plt_eh_frame_cie_size,
+				 plt_eh_frame_fde,
+				 plt_eh_frame_fde_size);
+  }
+
+ protected:
+  // Fill in the first PLT entry.
+  void
+  fill_first_plt_entry(unsigned char* pov,
+		       typename elfcpp::Elf_types<size>::Elf_Addr got_address,
+		       typename elfcpp::Elf_types<size>::Elf_Addr plt_address);
+
+  // Fill in a normal PLT entry.  Returns the offset into the entry that
+  // should be the initial GOT slot value.
+  unsigned int
+  fill_plt_entry(unsigned char* pov,
+		 typename elfcpp::Elf_types<size>::Elf_Addr got_address,
+		 typename elfcpp::Elf_types<size>::Elf_Addr plt_address,
+		 unsigned int got_offset,
+		 unsigned int plt_offset,
+		 unsigned int plt_rel_offset);
+
+  void
+  do_adjust_output_section(Output_section* os);
+
+  // Write to a map file.
+  void
+  do_print_to_mapfile(Mapfile* mapfile) const
+  { mapfile->print_output_data(this, _("** PLT")); }
+
+ private:
+  // Set the final size.
+  void
+  set_final_data_size();
+
+  // Write out the PLT data.
+  void
+  do_write(Output_file*);
+
+  // A pointer to the Layout class, so that we can find the .dynamic
+  // section when we write out the GOT PLT section.
+  Layout* layout_;
+  // The reloc section.
+  Reloc_section* rel_;
+  // The IRELATIVE relocs, if necessary.  These must follow the
+  // regular PLT relocations.
+  Reloc_section* irelative_rel_;
+  // The .got section.
+  Output_data_got<size, true>* got_;
+  // The .got.plt section.
+  Output_data_got_plt_s390<size>* got_plt_;
+  // The part of the .got.plt section used for IRELATIVE relocs.
+  Output_data_space* got_irelative_;
+  // The number of PLT entries.
+  unsigned int count_;
+  // Number of PLT entries with R_TILEGX_IRELATIVE relocs.  These
+  // follow the regular PLT entries.
+  unsigned int irelative_count_;
+  // List of available regions within the section, for incremental
+  // update links.
+  Free_list free_list_;
+
+  // The size of an entry in the PLT.
+  static const int plt_entry_size = 0x20;
+  // The first entry in the PLT.
+  static const unsigned char first_plt_entry_32_abs[plt_entry_size];
+  static const unsigned char first_plt_entry_32_pic[plt_entry_size];
+  static const unsigned char first_plt_entry_64[plt_entry_size];
+  // Other entries in the PLT for an executable.
+  static const unsigned char plt_entry_32_abs[plt_entry_size];
+  static const unsigned char plt_entry_32_pic12[plt_entry_size];
+  static const unsigned char plt_entry_32_pic16[plt_entry_size];
+  static const unsigned char plt_entry_32_pic[plt_entry_size];
+  static const unsigned char plt_entry_64[plt_entry_size];
+
+  // The .eh_frame unwind information for the PLT.
+  static const int plt_eh_frame_cie_size = 12;
+  static const unsigned char plt_eh_frame_cie[plt_eh_frame_cie_size];
+  static const int plt_eh_frame_fde_size = 12;
+  static const unsigned char plt_eh_frame_fde[plt_eh_frame_fde_size];
+};
+
+
+template<int size>
+class Target_s390 : public Sized_target<size, true>
+{
+ public:
+  typedef Output_data_reloc<elfcpp::SHT_RELA, true, size, true> Reloc_section;
+
+  Target_s390()
+    : Sized_target<size, true>(&s390_info),
+      got_(NULL), plt_(NULL), got_plt_(NULL), got_irelative_(NULL),
+      global_offset_table_(NULL), rela_dyn_(NULL),
+      rela_irelative_(NULL), copy_relocs_(elfcpp::R_390_COPY),
+      got_mod_index_offset_(-1U), tls_base_symbol_defined_(false),
+      layout_(NULL)
+  { }
+
+  // Scan the relocations to look for symbol adjustments.
+  void
+  gc_process_relocs(Symbol_table* symtab,
+		    Layout* layout,
+		    Sized_relobj_file<size, true>* object,
+		    unsigned int data_shndx,
+		    unsigned int sh_type,
+		    const unsigned char* prelocs,
+		    size_t reloc_count,
+		    Output_section* output_section,
+		    bool needs_special_offset_handling,
+		    size_t local_symbol_count,
+		    const unsigned char* plocal_symbols);
+
+  // Scan the relocations to look for symbol adjustments.
+  void
+  scan_relocs(Symbol_table* symtab,
+	      Layout* layout,
+	      Sized_relobj_file<size, true>* object,
+	      unsigned int data_shndx,
+	      unsigned int sh_type,
+	      const unsigned char* prelocs,
+	      size_t reloc_count,
+	      Output_section* output_section,
+	      bool needs_special_offset_handling,
+	      size_t local_symbol_count,
+	      const unsigned char* plocal_symbols);
+
+  // Finalize the sections.
+  void
+  do_finalize_sections(Layout*, const Input_objects*, Symbol_table*);
+
+  // Return the value to use for a dynamic which requires special
+  // treatment.
+  uint64_t
+  do_dynsym_value(const Symbol*) const;
+
+  // Relocate a section.
+  void
+  relocate_section(const Relocate_info<size, true>*,
+		   unsigned int sh_type,
+		   const unsigned char* prelocs,
+		   size_t reloc_count,
+		   Output_section* output_section,
+		   bool needs_special_offset_handling,
+		   unsigned char* view,
+		   typename elfcpp::Elf_types<size>::Elf_Addr view_address,
+		   section_size_type view_size,
+		   const Reloc_symbol_changes*);
+
+  // Scan the relocs during a relocatable link.
+  void
+  scan_relocatable_relocs(Symbol_table* symtab,
+			  Layout* layout,
+			  Sized_relobj_file<size, true>* object,
+			  unsigned int data_shndx,
+			  unsigned int sh_type,
+			  const unsigned char* prelocs,
+			  size_t reloc_count,
+			  Output_section* output_section,
+			  bool needs_special_offset_handling,
+			  size_t local_symbol_count,
+			  const unsigned char* plocal_symbols,
+			  Relocatable_relocs*);
+
+  // Return a string used to fill a code section with nops.
+  std::string
+  do_code_fill(section_size_type length) const;
+
+  // Emit relocations for a section.
+  void
+  relocate_relocs(
+      const Relocate_info<size, true>*,
+      unsigned int sh_type,
+      const unsigned char* prelocs,
+      size_t reloc_count,
+      Output_section* output_section,
+      typename elfcpp::Elf_types<size>::Elf_Off offset_in_output_section,
+      const Relocatable_relocs*,
+      unsigned char* view,
+      typename elfcpp::Elf_types<size>::Elf_Addr view_address,
+      section_size_type view_size,
+      unsigned char* reloc_view,
+      section_size_type reloc_view_size);
+
+  // Return whether SYM is defined by the ABI.
+  bool
+  do_is_defined_by_abi(const Symbol* sym) const
+  { return strcmp(sym->name(), "__tls_get_offset") == 0; }
+
+  // Return the PLT address to use for a global symbol.
+  uint64_t
+  do_plt_address_for_global(const Symbol* gsym) const
+  { return this->plt_section()->address_for_global(gsym); }
+
+  uint64_t
+  do_plt_address_for_local(const Relobj* relobj, unsigned int symndx) const
+  { return this->plt_section()->address_for_local(relobj, symndx); }
+
+  // Return the offset to use for the GOT_INDX'th got entry which is
+  // for a local tls symbol specified by OBJECT, SYMNDX.
+  int64_t
+  do_tls_offset_for_local(const Relobj* object,
+			  unsigned int symndx,
+			  unsigned int got_indx) const;
+
+  // Return the offset to use for the GOT_INDX'th got entry which is
+  // for global tls symbol GSYM.
+  int64_t
+  do_tls_offset_for_global(Symbol* gsym, unsigned int got_indx) const;
+
+  // This function should be defined in targets that can use relocation
+  // types to determine (implemented in local_reloc_may_be_function_pointer
+  // and global_reloc_may_be_function_pointer)
+  // if a function's pointer is taken.  ICF uses this in safe mode to only
+  // fold those functions whose pointer is defintely not taken.
+  bool
+  do_can_check_for_function_pointers() const
+  { return true; }
+
+  // Return the size of the GOT section.
+  section_size_type
+  got_size() const
+  {
+    gold_assert(this->got_ != NULL);
+    return this->got_->data_size();
+  }
+
+  // Return the number of entries in the GOT.
+  unsigned int
+  got_entry_count() const
+  {
+    if (this->got_ == NULL)
+      return 0;
+    return this->got_size() / (size / 8);
+  }
+
+  // Return the number of entries in the PLT.
+  unsigned int
+  plt_entry_count() const;
+
+  // Return the offset of the first non-reserved PLT entry.
+  unsigned int
+  first_plt_entry_offset() const;
+
+  // Return the size of each PLT entry.
+  unsigned int
+  plt_entry_size() const;
+
+  // Create the GOT section for an incremental update.
+  Output_data_got_base*
+  init_got_plt_for_update(Symbol_table* symtab,
+			  Layout* layout,
+			  unsigned int got_count,
+			  unsigned int plt_count);
+
+  // Reserve a GOT entry for a local symbol, and regenerate any
+  // necessary dynamic relocations.
+  void
+  reserve_local_got_entry(unsigned int got_index,
+			  Sized_relobj<size, true>* obj,
+			  unsigned int r_sym,
+			  unsigned int got_type);
+
+  // Reserve a GOT entry for a global symbol, and regenerate any
+  // necessary dynamic relocations.
+  void
+  reserve_global_got_entry(unsigned int got_index, Symbol* gsym,
+			   unsigned int got_type);
+
+  // Register an existing PLT entry for a global symbol.
+  void
+  register_global_plt_entry(Symbol_table*, Layout*, unsigned int plt_index,
+			    Symbol* gsym);
+
+  // Force a COPY relocation for a given symbol.
+  void
+  emit_copy_reloc(Symbol_table*, Symbol*, Output_section*, off_t);
+
+  // Apply an incremental relocation.
+  void
+  apply_relocation(const Relocate_info<size, true>* relinfo,
+		   typename elfcpp::Elf_types<size>::Elf_Addr r_offset,
+		   unsigned int r_type,
+		   typename elfcpp::Elf_types<size>::Elf_Swxword r_addend,
+		   const Symbol* gsym,
+		   unsigned char* view,
+		   typename elfcpp::Elf_types<size>::Elf_Addr address,
+		   section_size_type view_size);
+
+ private:
+
+  // The class which scans relocations.
+  class Scan
+  {
+  public:
+    Scan()
+      : issued_non_pic_error_(false)
+    { }
+
+    static inline int
+    get_reference_flags(unsigned int r_type);
+
+    inline void
+    local(Symbol_table* symtab, Layout* layout, Target_s390* target,
+	  Sized_relobj_file<size, true>* object,
+	  unsigned int data_shndx,
+	  Output_section* output_section,
+	  const elfcpp::Rela<size, true>& reloc, unsigned int r_type,
+	  const elfcpp::Sym<size, true>& lsym,
+	  bool is_discarded);
+
+    inline void
+    global(Symbol_table* symtab, Layout* layout, Target_s390* target,
+	   Sized_relobj_file<size, true>* object,
+	   unsigned int data_shndx,
+	   Output_section* output_section,
+	   const elfcpp::Rela<size, true>& reloc, unsigned int r_type,
+	   Symbol* gsym);
+
+    inline bool
+    local_reloc_may_be_function_pointer(Symbol_table* symtab, Layout* layout,
+					Target_s390* target,
+					Sized_relobj_file<size, true>* object,
+					unsigned int data_shndx,
+					Output_section* output_section,
+					const elfcpp::Rela<size, true>& reloc,
+					unsigned int r_type,
+					const elfcpp::Sym<size, true>& lsym);
+
+    inline bool
+    global_reloc_may_be_function_pointer(Symbol_table* symtab, Layout* layout,
+					 Target_s390* target,
+					 Sized_relobj_file<size, true>* object,
+					 unsigned int data_shndx,
+					 Output_section* output_section,
+					 const elfcpp::Rela<size, true>& reloc,
+					 unsigned int r_type,
+					 Symbol* gsym);
+
+  private:
+    static void
+    unsupported_reloc_local(Sized_relobj_file<size, true>*,
+			    unsigned int r_type);
+
+    static void
+    unsupported_reloc_global(Sized_relobj_file<size, true>*,
+			     unsigned int r_type, Symbol*);
+
+    void
+    check_non_pic(Relobj*, unsigned int r_type);
+
+    inline bool
+    possible_function_pointer_reloc(unsigned int r_type);
+
+    bool
+    reloc_needs_plt_for_ifunc(Sized_relobj_file<size, true>*,
+			      unsigned int r_type);
+
+    // Whether we have issued an error about a non-PIC compilation.
+    bool issued_non_pic_error_;
+  };
+
+  // The class which implements relocation.
+  class Relocate
+  {
+   public:
+    // Do a relocation.  Return false if the caller should not issue
+    // any warnings about this relocation.
+    inline bool
+    relocate(const Relocate_info<size, true>*, Target_s390*,
+	     Output_section*,
+	     size_t relnum, const elfcpp::Rela<size, true>&,
+	     unsigned int r_type, const Sized_symbol<size>*,
+	     const Symbol_value<size>*,
+	     unsigned char*, typename elfcpp::Elf_types<size>::Elf_Addr,
+	     section_size_type);
+
+   private:
+    // Do a TLS relocation.
+    inline typename elfcpp::Elf_types<size>::Elf_Addr
+    relocate_tls(const Relocate_info<size, true>*, Target_s390*,
+		 size_t relnum, const elfcpp::Rela<size, true>&,
+		 unsigned int r_type, const Sized_symbol<size>*,
+		 const Symbol_value<size>*,
+		 unsigned char*, section_size_type);
+
+    // Do a TLS General-Dynamic to Initial-Exec transition.
+    inline void
+    tls_gd_to_ie(const Relocate_info<size, true>*, size_t relnum,
+		 const elfcpp::Rela<size, true>&,
+		 unsigned char* view,
+		 section_size_type view_size);
+
+    // Do a TLS General-Dynamic to Local-Exec transition.
+    inline void
+    tls_gd_to_le(const Relocate_info<size, true>*, size_t relnum,
+		 const elfcpp::Rela<size, true>&,
+		 unsigned char* view,
+		 section_size_type view_size);
+
+    // Do a TLS Local-Dynamic to Local-Exec transition.
+    inline void
+    tls_ld_to_le(const Relocate_info<size, true>*, size_t relnum,
+		 const elfcpp::Rela<size, true>&,
+		 unsigned char* view,
+		 section_size_type view_size);
+
+    // Do a TLS Initial-Exec to Local-Exec transition.
+    static inline void
+    tls_ie_to_le(const Relocate_info<size, true>*, size_t relnum,
+		 const elfcpp::Rela<size, true>&,
+		 unsigned char* view,
+		 section_size_type view_size);
+  };
+
+  // A class which returns the size required for a relocation type,
+  // used while scanning relocs during a relocatable link.
+  class Relocatable_size_for_reloc
+  {
+   public:
+    unsigned int
+    get_size_for_reloc(unsigned int, Relobj*);
+  };
+
+  // Adjust TLS relocation type based on the options and whether this
+  // is a local symbol.
+  static tls::Tls_optimization
+  optimize_tls_reloc(bool is_final, int r_type);
+
+  // Get the GOT section.
+  const Output_data_got<size, true>*
+  got_section() const
+  {
+    gold_assert(this->got_ != NULL);
+    return this->got_;
+  }
+
+  // Get the GOT section, creating it if necessary.
+  Output_data_got<size, true>*
+  got_section(Symbol_table*, Layout*);
+
+  typename elfcpp::Elf_types<size>::Elf_Addr
+  got_address() const
+  {
+    gold_assert(this->got_ != NULL);
+    return this->got_plt_->address();
+  }
+
+  typename elfcpp::Elf_types<size>::Elf_Addr
+  got_main_offset() const
+  {
+    gold_assert(this->got_ != NULL);
+    return this->got_->address() - this->got_address();
+  }
+
+  // Create the PLT section.
+  void
+  make_plt_section(Symbol_table* symtab, Layout* layout);
+
+  // Create a PLT entry for a global symbol.
+  void
+  make_plt_entry(Symbol_table*, Layout*, Symbol*);
+
+  // Create a PLT entry for a local STT_GNU_IFUNC symbol.
+  void
+  make_local_ifunc_plt_entry(Symbol_table*, Layout*,
+			     Sized_relobj_file<size, true>* relobj,
+			     unsigned int local_sym_index);
+
+  // Create a GOT entry for the TLS module index.
+  unsigned int
+  got_mod_index_entry(Symbol_table* symtab, Layout* layout,
+		      Sized_relobj_file<size, true>* object);
+
+  // Get the PLT section.
+  Output_data_plt_s390<size>*
+  plt_section() const
+  {
+    gold_assert(this->plt_ != NULL);
+    return this->plt_;
+  }
+
+  // Get the dynamic reloc section, creating it if necessary.
+  Reloc_section*
+  rela_dyn_section(Layout*);
+
+  // Get the section to use for IRELATIVE relocations.
+  Reloc_section*
+  rela_irelative_section(Layout*);
+
+  // Add a potential copy relocation.
+  void
+  copy_reloc(Symbol_table* symtab, Layout* layout,
+	     Sized_relobj_file<size, true>* object,
+	     unsigned int shndx, Output_section* output_section,
+	     Symbol* sym, const elfcpp::Rela<size, true>& reloc)
+  {
+    this->copy_relocs_.copy_reloc(symtab, layout,
+				  symtab->get_sized_symbol<size>(sym),
+				  object, shndx, output_section,
+				  reloc, this->rela_dyn_section(layout));
+  }
+
+  // Information about this specific target which we pass to the
+  // general Target structure.
+  static Target::Target_info s390_info;
+
+  // The types of GOT entries needed for this platform.
+  // These values are exposed to the ABI in an incremental link.
+  // Do not renumber existing values without changing the version
+  // number of the .gnu_incremental_inputs section.
+  enum Got_type
+  {
+    GOT_TYPE_STANDARD = 0,      // GOT entry for a regular symbol
+    GOT_TYPE_TLS_OFFSET = 1,    // GOT entry for TLS offset
+    GOT_TYPE_TLS_PAIR = 2,      // GOT entry for TLS module/offset pair
+  };
+
+  // The GOT section.
+  Output_data_got<size, true>* got_;
+  // The PLT section.
+  Output_data_plt_s390<size>* plt_;
+  // The GOT PLT section.
+  Output_data_got_plt_s390<size>* got_plt_;
+  // The GOT section for IRELATIVE relocations.
+  Output_data_space* got_irelative_;
+  // The _GLOBAL_OFFSET_TABLE_ symbol.
+  Symbol* global_offset_table_;
+  // The dynamic reloc section.
+  Reloc_section* rela_dyn_;
+  // The section to use for IRELATIVE relocs.
+  Reloc_section* rela_irelative_;
+  // Relocs saved to avoid a COPY reloc.
+  Copy_relocs<elfcpp::SHT_RELA, size, true> copy_relocs_;
+  // Offset of the GOT entry for the TLS module index.
+  unsigned int got_mod_index_offset_;
+  // True if the _TLS_MODULE_BASE_ symbol has been defined.
+  bool tls_base_symbol_defined_;
+  // For use in do_tls_offset_for_*
+  Layout *layout_;
+};
+
+template<>
+Target::Target_info Target_s390<32>::s390_info =
+{
+  32,			// size
+  true,			// is_big_endian
+  elfcpp::EM_S390,	// machine_code
+  false,		// has_make_symbol
+  false,		// has_resolve
+  true,			// has_code_fill
+  true,			// is_default_stack_executable
+  true,			// can_icf_inline_merge_sections
+  '\0',			// wrap_char
+  "/lib/ld.so.1",	// dynamic_linker
+  0x00400000,		// default_text_segment_address
+  4 * 1024,		// abi_pagesize (overridable by -z max-page-size)
+  4 * 1024,		// common_pagesize (overridable by -z common-page-size)
+  false,                // isolate_execinstr
+  0,                    // rosegment_gap
+  elfcpp::SHN_UNDEF,	// small_common_shndx
+  elfcpp::SHN_UNDEF,	// large_common_shndx
+  0,			// small_common_section_flags
+  0,			// large_common_section_flags
+  NULL,			// attributes_section
+  NULL,			// attributes_vendor
+  "_start",		// entry_symbol_name
+  32,			// hash_entry_size
+};
+
+template<>
+Target::Target_info Target_s390<64>::s390_info =
+{
+  64,			// size
+  true,			// is_big_endian
+  elfcpp::EM_S390,	// machine_code
+  false,		// has_make_symbol
+  false,		// has_resolve
+  true,			// has_code_fill
+  true,			// is_default_stack_executable
+  true,			// can_icf_inline_merge_sections
+  '\0',			// wrap_char
+  "/lib/ld64.so.1",	// dynamic_linker
+  0x80000000ll,		// default_text_segment_address
+  4 * 1024,		// abi_pagesize (overridable by -z max-page-size)
+  4 * 1024,		// common_pagesize (overridable by -z common-page-size)
+  false,                // isolate_execinstr
+  0,                    // rosegment_gap
+  elfcpp::SHN_UNDEF,	// small_common_shndx
+  elfcpp::SHN_UNDEF,	// large_common_shndx
+  0,			// small_common_section_flags
+  0,			// large_common_section_flags
+  NULL,			// attributes_section
+  NULL,			// attributes_vendor
+  "_start",		// entry_symbol_name
+  64,			// hash_entry_size
+};
+
+template<int size>
+class S390_relocate_functions
+{
+public:
+  enum Overflow_check
+  {
+    CHECK_NONE,
+    CHECK_SIGNED,
+    CHECK_UNSIGNED,
+    CHECK_BITFIELD,
+    CHECK_LOW_INSN,
+    CHECK_HIGH_INSN
+  };
+
+  enum Status
+  {
+    STATUS_OK,
+    STATUS_OVERFLOW
+  };
+
+private:
+  typedef S390_relocate_functions<size> This;
+  typedef typename elfcpp::Elf_types<size>::Elf_Addr Address;
+
+  template<int valsize>
+  static inline bool
+  has_overflow_signed(Address value)
+  {
+    // limit = 1 << (valsize - 1) without shift count exceeding size of type
+    Address limit = static_cast<Address>(1) << ((valsize - 1) >> 1);
+    limit <<= ((valsize - 1) >> 1);
+    limit <<= ((valsize - 1) - 2 * ((valsize - 1) >> 1));
+    return value + limit > (limit << 1) - 1;
+  }
+
+  template<int valsize>
+  static inline bool
+  has_overflow_unsigned(Address value)
+  {
+    Address limit = static_cast<Address>(1) << ((valsize - 1) >> 1);
+    limit <<= ((valsize - 1) >> 1);
+    limit <<= ((valsize - 1) - 2 * ((valsize - 1) >> 1));
+    return value > (limit << 1) - 1;
+  }
+
+  template<int fieldsize>
+  static inline void
+  rela(unsigned char* view, Address mask, Address value)
+  {
+    typedef typename elfcpp::Swap<fieldsize, true>::Valtype Valtype;
+    Valtype* wv = reinterpret_cast<Valtype*>(view);
+    Valtype val = elfcpp::Swap<fieldsize, true>::readval(view);
+    val &= ~mask;
+    value &= mask;
+    elfcpp::Swap<fieldsize, true>::writeval(wv, val | value);
+  }
+
+public:
+  // R_390_12, R_390_GOT12, R_390_GOTPLT12, R_390_GOTIE12
+  static inline Status
+  rela12(unsigned char* view, Address value)
+  {
+    if (This::template has_overflow_unsigned<12>(value))
+      return STATUS_OVERFLOW;
+    This::template rela<16>(view, 0x0fff, value);
+    return STATUS_OK;
+  }
+
+  // R_390_16, R_390_GOT16, R_390_GOTPLT16, R_390_GOTOFF16, R_390_PLTOFF16
+  static inline Status
+  rela16(unsigned char* view, Address value)
+  {
+    if (This::template has_overflow_signed<16>(value))
+      return STATUS_OVERFLOW;
+    This::template rela<16>(view, 0xffff, value);
+    return STATUS_OK;
+  }
+
+  // R_390_20, R_390_GOT20, R_390_GOTPLT20, R_390_GOTIE20
+  static inline Status
+  rela20(unsigned char* view, Address value)
+  {
+    if (This::template has_overflow_signed<20>(value))
+      return STATUS_OVERFLOW;
+    This::template rela<16>(view, 0x0fff, value);
+    This::template rela<16>(view + 2, 0xff00, value >> (12 - 8));
+    return STATUS_OK;
+  }
+
+  // R_390_PC12DBL, R_390_PLT12DBL
+  static inline Status
+  pcrela12dbl(unsigned char* view, Address value, Address address)
+  {
+    value -= address;
+    if ((value & 1) != 0)
+      return STATUS_OVERFLOW;
+    if (This::template has_overflow_signed<13>(value))
+      return STATUS_OVERFLOW;
+    value >>= 1;
+    This::template rela<16>(view, 0x0fff, value);
+    return STATUS_OK;
+  }
+
+  // R_390_PC16DBL, R_390_PLT16DBL
+  static inline Status
+  pcrela16dbl(unsigned char* view, Address value, Address address)
+  {
+    value -= address;
+    if ((value & 1) != 0)
+      return STATUS_OVERFLOW;
+    if (This::template has_overflow_signed<17>(value))
+      return STATUS_OVERFLOW;
+    value >>= 1;
+    This::template rela<16>(view, 0xffff, value);
+    return STATUS_OK;
+  }
+
+  // R_390_PC24DBL, R_390_PLT24DBL
+  static inline Status
+  pcrela24dbl(unsigned char* view, Address value, Address address)
+  {
+    value -= address;
+    if ((value & 1) != 0)
+      return STATUS_OVERFLOW;
+    if (This::template has_overflow_signed<25>(value))
+      return STATUS_OVERFLOW;
+    value >>= 1;
+    // Swap doesn't take 24-bit fields well...
+    This::template rela<8>(view, 0xff, value >> 16);
+    This::template rela<16>(view + 1, 0xffff, value);
+    return STATUS_OK;
+  }
+
+  // R_390_PC32DBL, R_390_PLT32DBL, R_390_GOTPCDBL, R_390_GOTENT, R_390_GOTPLTENT
+  static inline Status
+  pcrela32dbl(unsigned char* view, Address value, Address address)
+  {
+    Address reloc = value - address;
+    if ((reloc & 1) != 0)
+      {
+	gold_warning(_("R_390_PC32DBL target misaligned at %llx"), (long long)address);
+	// Wait for a fix for https://sourceware.org/bugzilla/show_bug.cgi?id=18960
+	// return STATUS_OVERFLOW;
+      }
+    if (This::template has_overflow_signed<33>(reloc))
+      return STATUS_OVERFLOW;
+    reloc >>= 1;
+    if (value < address && size == 32)
+      reloc |= 0x80000000;
+    This::template rela<32>(view, 0xffffffff, reloc);
+    return STATUS_OK;
+  }
+
+};
+
+// Initialize the PLT section.
+
+template<int size>
+void
+Output_data_plt_s390<size>::init(Layout* layout)
+{
+  this->rel_ = new Reloc_section(false);
+  layout->add_output_section_data(".rela.plt", elfcpp::SHT_RELA,
+				  elfcpp::SHF_ALLOC, this->rel_,
+				  ORDER_DYNAMIC_PLT_RELOCS, false);
+}
+
+template<int size>
+void
+Output_data_plt_s390<size>::do_adjust_output_section(Output_section* os)
+{
+  os->set_entsize(plt_entry_size);
+}
+
+// Add an entry to the PLT.
+
+template<int size>
+void
+Output_data_plt_s390<size>::add_entry(Symbol_table* symtab, Layout* layout,
+					Symbol* gsym)
+{
+  gold_assert(!gsym->has_plt_offset());
+
+  unsigned int plt_index;
+  off_t plt_offset;
+  section_offset_type got_offset;
+
+  unsigned int* pcount;
+  unsigned int offset;
+  unsigned int reserved;
+  Output_section_data_build* got;
+  if (gsym->type() == elfcpp::STT_GNU_IFUNC
+      && gsym->can_use_relative_reloc(false))
+    {
+      pcount = &this->irelative_count_;
+      offset = 0;
+      reserved = 0;
+      got = this->got_irelative_;
+    }
+  else
+    {
+      pcount = &this->count_;
+      offset = 1;
+      reserved = 3;
+      got = this->got_plt_;
+    }
+
+  if (!this->is_data_size_valid())
+    {
+      // Note that when setting the PLT offset for a non-IRELATIVE
+      // entry we skip the initial reserved PLT entry.
+      plt_index = *pcount + offset;
+      plt_offset = plt_index * plt_entry_size;
+
+      ++*pcount;
+
+      got_offset = (plt_index - offset + reserved) * size / 8;
+      gold_assert(got_offset == got->current_data_size());
+
+      // Every PLT entry needs a GOT entry which points back to the PLT
+      // entry (this will be changed by the dynamic linker, normally
+      // lazily when the function is called).
+      got->set_current_data_size(got_offset + size / 8);
+    }
+  else
+    {
+      // FIXME: This is probably not correct for IRELATIVE relocs.
+
+      // For incremental updates, find an available slot.
+      plt_offset = this->free_list_.allocate(plt_entry_size,
+					     plt_entry_size, 0);
+      if (plt_offset == -1)
+	gold_fallback(_("out of patch space (PLT);"
+			" relink with --incremental-full"));
+
+      // The GOT and PLT entries have a 1-1 correspondance, so the GOT offset
+      // can be calculated from the PLT index, adjusting for the three
+      // reserved entries at the beginning of the GOT.
+      plt_index = plt_offset / plt_entry_size - 1;
+      got_offset = (plt_index - offset + reserved) * size / 8;
+    }
+
+  gsym->set_plt_offset(plt_offset);
+
+  // Every PLT entry needs a reloc.
+  this->add_relocation(symtab, layout, gsym, got_offset);
+
+  // Note that we don't need to save the symbol.  The contents of the
+  // PLT are independent of which symbols are used.  The symbols only
+  // appear in the relocations.
+}
+
+// Add an entry to the PLT for a local STT_GNU_IFUNC symbol.  Return
+// the PLT offset.
+
+template<int size>
+unsigned int
+Output_data_plt_s390<size>::add_local_ifunc_entry(
+    Symbol_table* symtab,
+    Layout* layout,
+    Sized_relobj_file<size, true>* relobj,
+    unsigned int local_sym_index)
+{
+  unsigned int plt_offset = this->irelative_count_ * plt_entry_size;
+  ++this->irelative_count_;
+
+  section_offset_type got_offset = this->got_irelative_->current_data_size();
+
+  // Every PLT entry needs a GOT entry which points back to the PLT
+  // entry.
+  this->got_irelative_->set_current_data_size(got_offset + size / 8);
+
+  // Every PLT entry needs a reloc.
+  Reloc_section* rela = this->rela_irelative(symtab, layout);
+  rela->add_symbolless_local_addend(relobj, local_sym_index,
+				    elfcpp::R_390_IRELATIVE,
+				    this->got_irelative_, got_offset, 0);
+
+  return plt_offset;
+}
+
+// Add the relocation for a PLT entry.
+
+template<int size>
+void
+Output_data_plt_s390<size>::add_relocation(Symbol_table* symtab,
+					     Layout* layout,
+					     Symbol* gsym,
+					     unsigned int got_offset)
+{
+  if (gsym->type() == elfcpp::STT_GNU_IFUNC
+      && gsym->can_use_relative_reloc(false))
+    {
+      Reloc_section* rela = this->rela_irelative(symtab, layout);
+      rela->add_symbolless_global_addend(gsym, elfcpp::R_390_IRELATIVE,
+					 this->got_irelative_, got_offset, 0);
+    }
+  else
+    {
+      gsym->set_needs_dynsym_entry();
+      this->rel_->add_global(gsym, elfcpp::R_390_JMP_SLOT, this->got_plt_,
+			     got_offset, 0);
+    }
+}
+
+// Return where the IRELATIVE relocations should go in the PLT.  These
+// follow the JUMP_SLOT and the TLSDESC relocations.
+
+template<int size>
+typename Output_data_plt_s390<size>::Reloc_section*
+Output_data_plt_s390<size>::rela_irelative(Symbol_table* symtab,
+					     Layout* layout)
+{
+  if (this->irelative_rel_ == NULL)
+    {
+      this->irelative_rel_ = new Reloc_section(false);
+      layout->add_output_section_data(".rela.plt", elfcpp::SHT_RELA,
+				      elfcpp::SHF_ALLOC, this->irelative_rel_,
+				      ORDER_DYNAMIC_PLT_RELOCS, false);
+      gold_assert(this->irelative_rel_->output_section()
+		  == this->rel_->output_section());
+
+      if (parameters->doing_static_link())
+	{
+	  // A statically linked executable will only have a .rela.plt
+	  // section to hold R_390_IRELATIVE relocs for
+	  // STT_GNU_IFUNC symbols.  The library will use these
+	  // symbols to locate the IRELATIVE relocs at program startup
+	  // time.
+	  symtab->define_in_output_data("__rela_iplt_start", NULL,
+					Symbol_table::PREDEFINED,
+					this->irelative_rel_, 0, 0,
+					elfcpp::STT_NOTYPE, elfcpp::STB_GLOBAL,
+					elfcpp::STV_HIDDEN, 0, false, true);
+	  symtab->define_in_output_data("__rela_iplt_end", NULL,
+					Symbol_table::PREDEFINED,
+					this->irelative_rel_, 0, 0,
+					elfcpp::STT_NOTYPE, elfcpp::STB_GLOBAL,
+					elfcpp::STV_HIDDEN, 0, true, true);
+	}
+    }
+  return this->irelative_rel_;
+}
+
+// Return the PLT address to use for a global symbol.
+
+template<int size>
+uint64_t
+Output_data_plt_s390<size>::address_for_global(const Symbol* gsym)
+{
+  uint64_t offset = 0;
+  if (gsym->type() == elfcpp::STT_GNU_IFUNC
+      && gsym->can_use_relative_reloc(false))
+    offset = (this->count_ + 1) * plt_entry_size;
+  return this->address() + offset + gsym->plt_offset();
+}
+
+// Return the PLT address to use for a local symbol.  These are always
+// IRELATIVE relocs.
+
+template<int size>
+uint64_t
+Output_data_plt_s390<size>::address_for_local(const Relobj* object,
+						unsigned int r_sym)
+{
+  return (this->address()
+	  + (this->count_ + 1) * plt_entry_size
+	  + object->local_plt_offset(r_sym));
+}
+
+// Set the final size.
+template<int size>
+void
+Output_data_plt_s390<size>::set_final_data_size()
+{
+  unsigned int count = this->count_ + this->irelative_count_;
+  this->set_data_size((count + 1) * plt_entry_size);
+}
+
+template<int size>
+const unsigned char
+Output_data_plt_s390<size>::first_plt_entry_32_abs[plt_entry_size] =
+{
+  0x50, 0x10, 0xf0, 0x1c, // st %r1, 28(%r15)
+  0x0d, 0x10, // basr %r1, %r0
+  0x58, 0x10, 0x10, 0x12, // l %r1, 18(%r1)
+  0xd2, 0x03, 0xf0, 0x18, 0x10, 0x04, // mvc 24(4,%r15), 4(%r1)
+  0x58, 0x10, 0x10, 0x08, // l %r1, 8(%r1)
+  0x07, 0xf1, // br %r1
+  0x00, 0x00, // padding
+  0x00, 0x00, 0x00, 0x00, // _GLOBAL_OFFSET_TABLE_ (to fill)
+  0x00, 0x00, 0x00, 0x00, // padding
+};
+
+template<int size>
+const unsigned char
+Output_data_plt_s390<size>::first_plt_entry_32_pic[plt_entry_size] =
+{
+  0x50, 0x10, 0xf0, 0x1c, // st %r1, 28(%r15)
+  0x58, 0x10, 0xc0, 0x04, // l %r1, 4(%r12)
+  0x50, 0x10, 0xf0, 0x18, // st %r1, 24(%r15)
+  0x58, 0x10, 0xc0, 0x08, // l %r1, 8(%r12)
+  0x07, 0xf1, // br %r1
+  0x00, 0x00, // padding
+  0x00, 0x00, 0x00, 0x00, // padding
+  0x00, 0x00, 0x00, 0x00, // padding
+  0x00, 0x00, 0x00, 0x00, // padding
+};
+
+template<int size>
+const unsigned char
+Output_data_plt_s390<size>::first_plt_entry_64[plt_entry_size] =
+{
+  0xe3, 0x10, 0xf0, 0x38, 0x00, 0x24, // stg %r1, 56(%r15)
+  0xc0, 0x10, 0x00, 0x00, 0x00, 0x00, // larl %r1, _GLOBAL_OFFSET_TABLE_ (to fill)
+  0xd2, 0x07, 0xf0, 0x30, 0x10, 0x08, // mvc 48(8,%r15), 8(%r1)
+  0xe3, 0x10, 0x10, 0x10, 0x00, 0x04, // lg %r1, 16(%r1)
+  0x07, 0xf1, // br %r1
+  0x07, 0x00, // nopr
+  0x07, 0x00, // nopr
+  0x07, 0x00, // nopr
+};
+
+template<int size>
+void
+Output_data_plt_s390<size>::fill_first_plt_entry(
+    unsigned char* pov,
+    typename elfcpp::Elf_types<size>::Elf_Addr got_address,
+    typename elfcpp::Elf_types<size>::Elf_Addr plt_address)
+{
+  if (size == 64)
+    {
+      memcpy(pov, first_plt_entry_64, plt_entry_size);
+      S390_relocate_functions<size>::pcrela32dbl(pov + 8, got_address, (plt_address + 6));
+    }
+  else if (!parameters->options().output_is_position_independent())
+    {
+      memcpy(pov, first_plt_entry_32_abs, plt_entry_size);
+      elfcpp::Swap<32, true>::writeval(pov + 24, got_address);
+    }
+  else
+    {
+      memcpy(pov, first_plt_entry_32_pic, plt_entry_size);
+    }
+}
+
+template<int size>
+const unsigned char
+Output_data_plt_s390<size>::plt_entry_32_abs[plt_entry_size] =
+{
+  // first part
+  0x0d, 0x10, // basr %r1, %r0
+  0x58, 0x10, 0x10, 0x16, // l %r1, 22(%r1)
+  0x58, 0x10, 0x10, 0x00, // l %r1, 0(%r1)
+  0x07, 0xf1, // br %r1
+  // second part
+  0x0d, 0x10, // basr %r1, %r0
+  0x58, 0x10, 0x10, 0x0e, // l %r1, 14(%r1)
+  0xa7, 0xf4, 0x00, 0x00, // j first_plt_entry (to fill)
+  0x00, 0x00, // padding
+  0x00, 0x00, 0x00, 0x00, // _GLOBAL_OFFSET_TABLE_+sym@gotplt (to fill)
+  0x00, 0x00, 0x00, 0x00, // offset of relocation in .rela.plt (to fill)
+};
+
+template<int size>
+const unsigned char
+Output_data_plt_s390<size>::plt_entry_32_pic12[plt_entry_size] =
+{
+  // first part
+  0x58, 0x10, 0xc0, 0x00, // l %r1, sym@gotplt(%r12) (to fill)
+  0x07, 0xf1, // br %r1
+  0x00, 0x00, // padding
+  0x00, 0x00, 0x00, 0x00, // padding
+  // second part
+  0x0d, 0x10, // basr %r1, %r0
+  0x58, 0x10, 0x10, 0x0e, // l %r1, 14(%r1)
+  0xa7, 0xf4, 0x00, 0x00, // j first_plt_entry (to fill)
+  0x00, 0x00, // padding
+  0x00, 0x00, 0x00, 0x00, // padding
+  0x00, 0x00, 0x00, 0x00, // offset of relocation in .rela.plt (to fill)
+};
+
+template<int size>
+const unsigned char
+Output_data_plt_s390<size>::plt_entry_32_pic16[plt_entry_size] =
+{
+  // first part
+  0xa7, 0x18, 0x00, 0x00, // lhi %r1, sym@gotplt (to fill)
+  0x58, 0x11, 0xc0, 0x00, // l %r1, 0(%r1, %r12)
+  0x07, 0xf1, // br %r1
+  0x00, 0x00, // padding
+  // second part
+  0x0d, 0x10, // basr %r1, %r0
+  0x58, 0x10, 0x10, 0x0e, // l %r1, 14(%r1)
+  0xa7, 0xf4, 0x00, 0x00, // j first_plt_entry (to fill)
+  0x00, 0x00, // padding
+  0x00, 0x00, 0x00, 0x00, // padding
+  0x00, 0x00, 0x00, 0x00, // offset of relocation in .rela.plt (to fill)
+};
+
+template<int size>
+const unsigned char
+Output_data_plt_s390<size>::plt_entry_32_pic[plt_entry_size] =
+{
+  // first part
+  0x0d, 0x10, // basr %r1, %r0
+  0x58, 0x10, 0x10, 0x16, // l %r1, 22(%r1)
+  0x58, 0x11, 0xc0, 0x00, // l %r1, 0(%r1, %r12)
+  0x07, 0xf1, // br %r1
+  // second part
+  0x0d, 0x10, // basr %r1, %r0
+  0x58, 0x10, 0x10, 0x0e, // l %r1, 14(%r1)
+  0xa7, 0xf4, 0x00, 0x00, // j first_plt_entry (to fill)
+  0x00, 0x00, // padding
+  0x00, 0x00, 0x00, 0x00, // sym@gotplt (to fill)
+  0x00, 0x00, 0x00, 0x00, // offset of relocation in .rela.plt (to fill)
+};
+
+template<int size>
+const unsigned char
+Output_data_plt_s390<size>::plt_entry_64[plt_entry_size] =
+{
+  // first part
+  0xc0, 0x10, 0x00, 0x00, 0x00, 0x00, // larl %r1, _GLOBAL_OFFSET_TABLE_+off (to fill)
+  0xe3, 0x10, 0x10, 0x00, 0x00, 0x04, // lg %r1, 0(%r1)
+  0x07, 0xf1, // br %r1
+  // second part
+  0x0d, 0x10, // basr %r1, %r0
+  0xe3, 0x10, 0x10, 0x0c, 0x00, 0x14, // lgf %r1, 12(%r1)
+  0xc0, 0xf4, 0x00, 0x00, 0x00, 0x00, // jg first_plt_entry (to fill)
+  0x00, 0x00, 0x00, 0x00, // offset of relocation in .rela.plt (to fill)
+};
+
+template<int size>
+unsigned int
+Output_data_plt_s390<size>::fill_plt_entry(
+    unsigned char* pov,
+    typename elfcpp::Elf_types<size>::Elf_Addr got_address,
+    typename elfcpp::Elf_types<size>::Elf_Addr plt_address,
+    unsigned int got_offset,
+    unsigned int plt_offset,
+    unsigned int plt_rel_offset)
+{
+  if (size == 64)
+  {
+    memcpy(pov, plt_entry_64, plt_entry_size);
+    S390_relocate_functions<size>::pcrela32dbl(pov + 2, got_address + got_offset, plt_address + plt_offset);
+    S390_relocate_functions<size>::pcrela32dbl(pov + 24, plt_address, plt_address + plt_offset + 22);
+  }
+  else
+  {
+    if (!parameters->options().output_is_position_independent())
+      {
+	memcpy(pov, plt_entry_32_abs, plt_entry_size);
+	elfcpp::Swap<32, true>::writeval(pov + 24, got_address + got_offset);
+      }
+    else
+      {
+	if (got_offset < 0x1000)
+	  {
+	    memcpy(pov, plt_entry_32_pic12, plt_entry_size);
+	    S390_relocate_functions<size>::rela12(pov + 2, got_offset);
+	  }
+	else if (got_offset < 0x8000)
+	  {
+	    memcpy(pov, plt_entry_32_pic16, plt_entry_size);
+	    S390_relocate_functions<size>::rela16(pov + 2, got_offset);
+	  }
+	else
+	  {
+	    memcpy(pov, plt_entry_32_pic, plt_entry_size);
+	    elfcpp::Swap<32, true>::writeval(pov + 24, got_offset);
+	  }
+      }
+    typename elfcpp::Elf_types<size>::Elf_Addr target = plt_address;
+    if (plt_offset >= 0x10000)
+      {
+	// Would overflow pcrela16dbl - aim at the farthest previous jump
+	// we can reach.
+	if (plt_offset > 0x10000)
+	  {
+	    // Use the full range of pcrel16dbl.
+	    target = plt_address + plt_offset - 0x10000 + 18;
+	  }
+	else
+	  {
+	    // if plt_offset is exactly 0x10000, the above would aim at 18th byte
+	    // of first_plt_entry, which doesn't have the jump back like the others.
+	    // Aim at the next entry instead.
+	    target = plt_address + plt_offset - 0xffe0 + 18;
+	  }
+      }
+    S390_relocate_functions<size>::pcrela16dbl(pov + 20, target, plt_address + plt_offset + 18);
+  }
+  elfcpp::Swap<32, true>::writeval(pov + 28, plt_rel_offset);
+  if (size == 64)
+    return 14;
+  else
+    return 12;
+}
+
+// The .eh_frame unwind information for the PLT.
+
+template<>
+const unsigned char
+Output_data_plt_s390<32>::plt_eh_frame_cie[plt_eh_frame_cie_size] =
+{
+  1,				// CIE version.
+  'z',				// Augmentation: augmentation size included.
+  'R',				// Augmentation: FDE encoding included.
+  '\0',				// End of augmentation string.
+  1,				// Code alignment factor.
+  0x7c,				// Data alignment factor.
+  14,				// Return address column.
+  1,				// Augmentation size.
+  (elfcpp::DW_EH_PE_pcrel	// FDE encoding.
+   | elfcpp::DW_EH_PE_sdata4),
+  elfcpp::DW_CFA_def_cfa, 15, 0x60,	// DW_CFA_def_cfa: r15 ofs 0x60.
+};
+
+template<>
+const unsigned char
+Output_data_plt_s390<64>::plt_eh_frame_cie[plt_eh_frame_cie_size] =
+{
+  1,				// CIE version.
+  'z',				// Augmentation: augmentation size included.
+  'R',				// Augmentation: FDE encoding included.
+  '\0',				// End of augmentation string.
+  1,				// Code alignment factor.
+  0x78,				// Data alignment factor.
+  14,				// Return address column.
+  1,				// Augmentation size.
+  (elfcpp::DW_EH_PE_pcrel	// FDE encoding.
+   | elfcpp::DW_EH_PE_sdata4),
+  elfcpp::DW_CFA_def_cfa, 15, 0xa0,	// DW_CFA_def_cfa: r15 ofs 0xa0.
+};
+
+template<int size>
+const unsigned char
+Output_data_plt_s390<size>::plt_eh_frame_fde[plt_eh_frame_fde_size] =
+{
+  0, 0, 0, 0,				// Replaced with offset to .plt.
+  0, 0, 0, 0,				// Replaced with size of .plt.
+  0,					// Augmentation size.
+  elfcpp::DW_CFA_nop,
+  elfcpp::DW_CFA_nop,
+  elfcpp::DW_CFA_nop
+};
+
+// Write out the PLT.  This uses the hand-coded instructions above,
+// and adjusts them as needed.
+
+template<int size>
+void
+Output_data_plt_s390<size>::do_write(Output_file* of)
+{
+  const off_t offset = this->offset();
+  const section_size_type oview_size =
+    convert_to_section_size_type(this->data_size());
+  unsigned char* const oview = of->get_output_view(offset, oview_size);
+
+  const off_t got_file_offset = this->got_plt_->offset();
+  gold_assert(parameters->incremental_update()
+	      || (got_file_offset + this->got_plt_->data_size()
+		  == this->got_irelative_->offset()));
+  const section_size_type got_size =
+    convert_to_section_size_type(this->got_plt_->data_size()
+				 + this->got_irelative_->data_size());
+  unsigned char* const got_view = of->get_output_view(got_file_offset,
+						      got_size);
+
+  unsigned char* pov = oview;
+
+  // The base address of the .plt section.
+  typename elfcpp::Elf_types<size>::Elf_Addr plt_address = this->address();
+  // The base address of the PLT portion of the .got section,
+  // which is where the GOT pointer will point, and where the
+  // three reserved GOT entries are located.
+  typename elfcpp::Elf_types<size>::Elf_Addr got_address
+    = this->got_plt_->address();
+
+  this->fill_first_plt_entry(pov, got_address, plt_address);
+  pov += this->get_plt_entry_size();
+
+  unsigned char* got_pov = got_view;
+
+  const int rel_size = elfcpp::Elf_sizes<size>::rela_size;
+
+  unsigned int plt_offset = this->get_plt_entry_size();
+  unsigned int plt_rel_offset = 0;
+  unsigned int got_offset = 3 * size / 8;
+  const unsigned int count = this->count_ + this->irelative_count_;
+  // The first three entries in the GOT are reserved, and are written
+  // by Output_data_got_plt_s390::do_write.
+  got_pov += 3 * size / 8;
+
+  for (unsigned int plt_index = 0;
+       plt_index < count;
+       ++plt_index,
+	 pov += plt_entry_size,
+	 got_pov += size / 8,
+	 plt_offset += plt_entry_size,
+	 plt_rel_offset += rel_size,
+	 got_offset += size / 8)
+    {
+      // Set and adjust the PLT entry itself.
+      unsigned int lazy_offset = this->fill_plt_entry(pov,
+						      got_address, plt_address,
+						      got_offset, plt_offset,
+						      plt_rel_offset);
+
+      // Set the entry in the GOT.
+      elfcpp::Swap<size, true>::writeval(got_pov,
+					plt_address + plt_offset + lazy_offset);
+    }
+
+  gold_assert(static_cast<section_size_type>(pov - oview) == oview_size);
+  gold_assert(static_cast<section_size_type>(got_pov - got_view) == got_size);
+
+  of->write_output_view(offset, oview_size, oview);
+  of->write_output_view(got_file_offset, got_size, got_view);
+}
+
+// Get the GOT section, creating it if necessary.
+
+template<int size>
+Output_data_got<size, true>*
+Target_s390<size>::got_section(Symbol_table* symtab, Layout* layout)
+{
+  if (this->got_ == NULL)
+    {
+      gold_assert(symtab != NULL && layout != NULL);
+
+      // When using -z now, we can treat .got as a relro section.
+      // Without -z now, it is modified after program startup by lazy
+      // PLT relocations.
+      bool is_got_relro = parameters->options().now();
+      Output_section_order got_order = (is_got_relro
+					? ORDER_RELRO_LAST
+					: ORDER_DATA);
+
+      // The old GNU linker creates a .got.plt section.  We just
+      // create another set of data in the .got section.  Note that we
+      // always create a PLT if we create a GOT, although the PLT
+      // might be empty.
+      this->got_plt_ = new Output_data_got_plt_s390<size>(layout);
+      layout->add_output_section_data(".got", elfcpp::SHT_PROGBITS,
+				      (elfcpp::SHF_ALLOC | elfcpp::SHF_WRITE),
+				      this->got_plt_, got_order, is_got_relro);
+
+      // The first three entries are reserved.
+      this->got_plt_->set_current_data_size(3 * size / 8);
+
+      // If there are any IRELATIVE relocations, they get GOT entries
+      // in .got.plt after the jump slot entries.
+      this->got_irelative_ = new Output_data_space(size / 8, "** GOT IRELATIVE PLT");
+      layout->add_output_section_data(".got", elfcpp::SHT_PROGBITS,
+				      (elfcpp::SHF_ALLOC | elfcpp::SHF_WRITE),
+				      this->got_irelative_,
+				      got_order, is_got_relro);
+
+      // Unlike some targets (.e.g x86), S/390 does not use separate .got and
+      // .got.plt sections in output.  The output .got section contains both
+      // PLT and non-PLT GOT entries.
+      this->got_ = new Output_data_got<size, true>();
+
+      layout->add_output_section_data(".got", elfcpp::SHT_PROGBITS,
+				      (elfcpp::SHF_ALLOC | elfcpp::SHF_WRITE),
+				      this->got_, got_order, is_got_relro);
+
+      // Define _GLOBAL_OFFSET_TABLE_ at the start of the GOT.
+      this->global_offset_table_ =
+        symtab->define_in_output_data("_GLOBAL_OFFSET_TABLE_", NULL,
+				      Symbol_table::PREDEFINED,
+				      this->got_plt_,
+				      0, 0, elfcpp::STT_OBJECT,
+				      elfcpp::STB_LOCAL,
+				      elfcpp::STV_HIDDEN, 0,
+				      false, false);
+
+    }
+  return this->got_;
+}
+
+// Get the dynamic reloc section, creating it if necessary.
+
+template<int size>
+typename Target_s390<size>::Reloc_section*
+Target_s390<size>::rela_dyn_section(Layout* layout)
+{
+  if (this->rela_dyn_ == NULL)
+    {
+      gold_assert(layout != NULL);
+      this->rela_dyn_ = new Reloc_section(parameters->options().combreloc());
+      layout->add_output_section_data(".rela.dyn", elfcpp::SHT_RELA,
+				      elfcpp::SHF_ALLOC, this->rela_dyn_,
+				      ORDER_DYNAMIC_RELOCS, false);
+    }
+  return this->rela_dyn_;
+}
+
+// Get the section to use for IRELATIVE relocs, creating it if
+// necessary.  These go in .rela.dyn, but only after all other dynamic
+// relocations.  They need to follow the other dynamic relocations so
+// that they can refer to global variables initialized by those
+// relocs.
+
+template<int size>
+typename Target_s390<size>::Reloc_section*
+Target_s390<size>::rela_irelative_section(Layout* layout)
+{
+  if (this->rela_irelative_ == NULL)
+    {
+      // Make sure we have already created the dynamic reloc section.
+      this->rela_dyn_section(layout);
+      this->rela_irelative_ = new Reloc_section(false);
+      layout->add_output_section_data(".rela.dyn", elfcpp::SHT_RELA,
+				      elfcpp::SHF_ALLOC, this->rela_irelative_,
+				      ORDER_DYNAMIC_RELOCS, false);
+      gold_assert(this->rela_dyn_->output_section()
+		  == this->rela_irelative_->output_section());
+    }
+  return this->rela_irelative_;
+}
+
+// Write the first three reserved words of the .got.plt section.
+// The remainder of the section is written while writing the PLT
+// in Output_data_plt_s390::do_write.
+
+template<int size>
+void
+Output_data_got_plt_s390<size>::do_write(Output_file* of)
+{
+  // The first entry in the GOT is the address of the .dynamic section
+  // aka the PT_DYNAMIC segment.  The next two entries are reserved.
+  // We saved space for them when we created the section in
+  // Target_x86_64::got_section.
+  const off_t got_file_offset = this->offset();
+  gold_assert(this->data_size() >= 3 * size / 8);
+  unsigned char* const got_view =
+      of->get_output_view(got_file_offset, 3 * size / 8);
+  Output_section* dynamic = this->layout_->dynamic_section();
+  uint64_t dynamic_addr = dynamic == NULL ? 0 : dynamic->address();
+  elfcpp::Swap<size, true>::writeval(got_view, dynamic_addr);
+  memset(got_view + size / 8, 0, 2 * size / 8);
+  of->write_output_view(got_file_offset, 3 * size / 8, got_view);
+}
+
+// Create the PLT section.
+
+template<int size>
+void
+Target_s390<size>::make_plt_section(Symbol_table* symtab, Layout* layout)
+{
+  if (this->plt_ == NULL)
+    {
+      // Create the GOT sections first.
+      this->got_section(symtab, layout);
+
+      // Ensure that .rela.dyn always appears before .rela.plt  This is
+      // necessary due to how, on 32-bit S/390 and some other targets,
+      // .rela.dyn needs to include .rela.plt in it's range.
+      this->rela_dyn_section(layout);
+
+      this->plt_ = new Output_data_plt_s390<size>(layout,
+		      this->got_, this->got_plt_, this->got_irelative_);
+
+      // Add unwind information if requested.
+      if (parameters->options().ld_generated_unwind_info())
+	this->plt_->add_eh_frame(layout);
+
+      layout->add_output_section_data(".plt", elfcpp::SHT_PROGBITS,
+				      (elfcpp::SHF_ALLOC
+				       | elfcpp::SHF_EXECINSTR),
+				      this->plt_, ORDER_PLT, false);
+
+      // Make the sh_info field of .rela.plt point to .plt.
+      Output_section* rela_plt_os = this->plt_->rela_plt()->output_section();
+      rela_plt_os->set_info_section(this->plt_->output_section());
+    }
+}
+
+// Create a PLT entry for a global symbol.
+
+template<int size>
+void
+Target_s390<size>::make_plt_entry(Symbol_table* symtab, Layout* layout,
+				    Symbol* gsym)
+{
+  if (gsym->has_plt_offset())
+    return;
+
+  if (this->plt_ == NULL)
+    this->make_plt_section(symtab, layout);
+
+  this->plt_->add_entry(symtab, layout, gsym);
+}
+
+// Make a PLT entry for a local STT_GNU_IFUNC symbol.
+
+template<int size>
+void
+Target_s390<size>::make_local_ifunc_plt_entry(
+    Symbol_table* symtab, Layout* layout,
+    Sized_relobj_file<size, true>* relobj,
+    unsigned int local_sym_index)
+{
+  if (relobj->local_has_plt_offset(local_sym_index))
+    return;
+  if (this->plt_ == NULL)
+    this->make_plt_section(symtab, layout);
+  unsigned int plt_offset = this->plt_->add_local_ifunc_entry(symtab, layout,
+							      relobj,
+							      local_sym_index);
+  relobj->set_local_plt_offset(local_sym_index, plt_offset);
+}
+
+// Return the number of entries in the PLT.
+
+template<int size>
+unsigned int
+Target_s390<size>::plt_entry_count() const
+{
+  if (this->plt_ == NULL)
+    return 0;
+  return this->plt_->entry_count();
+}
+
+// Return the offset of the first non-reserved PLT entry.
+
+template<int size>
+unsigned int
+Target_s390<size>::first_plt_entry_offset() const
+{
+  return this->plt_->first_plt_entry_offset();
+}
+
+// Return the size of each PLT entry.
+
+template<int size>
+unsigned int
+Target_s390<size>::plt_entry_size() const
+{
+  return this->plt_->get_plt_entry_size();
+}
+
+// Create the GOT and PLT sections for an incremental update.
+
+template<int size>
+Output_data_got_base*
+Target_s390<size>::init_got_plt_for_update(Symbol_table* symtab,
+				       Layout* layout,
+				       unsigned int got_count,
+				       unsigned int plt_count)
+{
+  gold_assert(this->got_ == NULL);
+
+  // Add the three reserved entries.
+  this->got_plt_ = new Output_data_got_plt_s390<size>(layout, (plt_count + 3) * size / 8);
+  layout->add_output_section_data(".got", elfcpp::SHT_PROGBITS,
+				  (elfcpp::SHF_ALLOC
+				   | elfcpp::SHF_WRITE),
+				  this->got_plt_, ORDER_NON_RELRO_FIRST,
+				  false);
+
+  // If there are any IRELATIVE relocations, they get GOT entries in
+  // .got.plt after the jump slot entries.
+  this->got_irelative_ = new Output_data_space(0, size / 8, "** GOT IRELATIVE PLT");
+  layout->add_output_section_data(".got", elfcpp::SHT_PROGBITS,
+				  elfcpp::SHF_ALLOC | elfcpp::SHF_WRITE,
+				  this->got_irelative_,
+				  ORDER_NON_RELRO_FIRST, false);
+
+  this->got_ = new Output_data_got<size, true>(got_count * size / 8);
+  layout->add_output_section_data(".got", elfcpp::SHT_PROGBITS,
+				  (elfcpp::SHF_ALLOC
+				   | elfcpp::SHF_WRITE),
+				  this->got_, ORDER_RELRO_LAST,
+				  true);
+
+  // Define _GLOBAL_OFFSET_TABLE_ at the start of the PLT.
+  this->global_offset_table_ =
+    symtab->define_in_output_data("_GLOBAL_OFFSET_TABLE_", NULL,
+				  Symbol_table::PREDEFINED,
+				  this->got_plt_,
+				  0, 0, elfcpp::STT_OBJECT,
+				  elfcpp::STB_LOCAL,
+				  elfcpp::STV_HIDDEN, 0,
+				  false, false);
+
+  // Create the PLT section.
+  this->plt_ = new Output_data_plt_s390<size>(layout,
+		  this->got_, this->got_plt_, this->got_irelative_, plt_count);
+
+  // Add unwind information if requested.
+  if (parameters->options().ld_generated_unwind_info())
+    this->plt_->add_eh_frame(layout);
+
+  layout->add_output_section_data(".plt", elfcpp::SHT_PROGBITS,
+				  elfcpp::SHF_ALLOC | elfcpp::SHF_EXECINSTR,
+				  this->plt_, ORDER_PLT, false);
+
+  // Make the sh_info field of .rela.plt point to .plt.
+  Output_section* rela_plt_os = this->plt_->rela_plt()->output_section();
+  rela_plt_os->set_info_section(this->plt_->output_section());
+
+  // Create the rela_dyn section.
+  this->rela_dyn_section(layout);
+
+  return this->got_;
+}
+
+// Reserve a GOT entry for a local symbol, and regenerate any
+// necessary dynamic relocations.
+
+template<int size>
+void
+Target_s390<size>::reserve_local_got_entry(
+    unsigned int got_index,
+    Sized_relobj<size, true>* obj,
+    unsigned int r_sym,
+    unsigned int got_type)
+{
+  unsigned int got_offset = got_index * size / 8;
+  Reloc_section* rela_dyn = this->rela_dyn_section(NULL);
+
+  this->got_->reserve_local(got_index, obj, r_sym, got_type);
+  switch (got_type)
+    {
+    case GOT_TYPE_STANDARD:
+      if (parameters->options().output_is_position_independent())
+	rela_dyn->add_local_relative(obj, r_sym, elfcpp::R_390_RELATIVE,
+				     this->got_, got_offset, 0, false);
+      break;
+    case GOT_TYPE_TLS_OFFSET:
+      rela_dyn->add_local(obj, r_sym, elfcpp::R_390_TLS_TPOFF,
+			  this->got_, got_offset, 0);
+      break;
+    case GOT_TYPE_TLS_PAIR:
+      this->got_->reserve_slot(got_index + 1);
+      rela_dyn->add_local(obj, r_sym, elfcpp::R_390_TLS_DTPMOD,
+			  this->got_, got_offset, 0);
+      break;
+    default:
+      gold_unreachable();
+    }
+}
+
+// Reserve a GOT entry for a global symbol, and regenerate any
+// necessary dynamic relocations.
+
+template<int size>
+void
+Target_s390<size>::reserve_global_got_entry(unsigned int got_index,
+					      Symbol* gsym,
+					      unsigned int got_type)
+{
+  unsigned int got_offset = got_index * size / 8;
+  Reloc_section* rela_dyn = this->rela_dyn_section(NULL);
+
+  this->got_->reserve_global(got_index, gsym, got_type);
+  switch (got_type)
+    {
+    case GOT_TYPE_STANDARD:
+      if (!gsym->final_value_is_known())
+	{
+	  if (gsym->is_from_dynobj()
+	      || gsym->is_undefined()
+	      || gsym->is_preemptible()
+	      || gsym->type() == elfcpp::STT_GNU_IFUNC)
+	    rela_dyn->add_global(gsym, elfcpp::R_390_GLOB_DAT,
+				 this->got_, got_offset, 0);
+	  else
+	    rela_dyn->add_global_relative(gsym, elfcpp::R_390_RELATIVE,
+					  this->got_, got_offset, 0, false);
+	}
+      break;
+    case GOT_TYPE_TLS_OFFSET:
+      rela_dyn->add_global_relative(gsym, elfcpp::R_390_TLS_TPOFF,
+				    this->got_, got_offset, 0, false);
+      break;
+    case GOT_TYPE_TLS_PAIR:
+      this->got_->reserve_slot(got_index + 1);
+      rela_dyn->add_global_relative(gsym, elfcpp::R_390_TLS_DTPMOD,
+				    this->got_, got_offset, 0, false);
+      rela_dyn->add_global_relative(gsym, elfcpp::R_390_TLS_DTPOFF,
+				    this->got_, got_offset + size / 8, 0, false);
+      break;
+    default:
+      gold_unreachable();
+    }
+}
+
+// Register an existing PLT entry for a global symbol.
+
+template<int size>
+void
+Target_s390<size>::register_global_plt_entry(Symbol_table* symtab,
+					       Layout* layout,
+					       unsigned int plt_index,
+					       Symbol* gsym)
+{
+  gold_assert(this->plt_ != NULL);
+  gold_assert(!gsym->has_plt_offset());
+
+  this->plt_->reserve_slot(plt_index);
+
+  gsym->set_plt_offset((plt_index + 1) * this->plt_entry_size());
+
+  unsigned int got_offset = (plt_index + 3) * size / 8;
+  this->plt_->add_relocation(symtab, layout, gsym, got_offset);
+}
+
+// Force a COPY relocation for a given symbol.
+
+template<int size>
+void
+Target_s390<size>::emit_copy_reloc(
+    Symbol_table* symtab, Symbol* sym, Output_section* os, off_t offset)
+{
+  this->copy_relocs_.emit_copy_reloc(symtab,
+				     symtab->get_sized_symbol<size>(sym),
+				     os,
+				     offset,
+				     this->rela_dyn_section(NULL));
+}
+
+// Create a GOT entry for the TLS module index.
+
+template<int size>
+unsigned int
+Target_s390<size>::got_mod_index_entry(Symbol_table* symtab, Layout* layout,
+					 Sized_relobj_file<size, true>* object)
+{
+  if (this->got_mod_index_offset_ == -1U)
+    {
+      gold_assert(symtab != NULL && layout != NULL && object != NULL);
+      Reloc_section* rela_dyn = this->rela_dyn_section(layout);
+      Output_data_got<size, true>* got = this->got_section(symtab, layout);
+      unsigned int got_offset = got->add_constant(0);
+      rela_dyn->add_local(object, 0, elfcpp::R_390_TLS_DTPMOD, got,
+			  got_offset, 0);
+      got->add_constant(0);
+      this->got_mod_index_offset_ = got_offset;
+    }
+  return this->got_mod_index_offset_;
+}
+
+// Optimize the TLS relocation type based on what we know about the
+// symbol.  IS_FINAL is true if the final address of this symbol is
+// known at link time.
+
+template<int size>
+tls::Tls_optimization
+Target_s390<size>::optimize_tls_reloc(bool is_final, int r_type)
+{
+  // If we are generating a shared library, then we can't do anything
+  // in the linker.
+  if (parameters->options().shared())
+    return tls::TLSOPT_NONE;
+
+  switch (r_type)
+    {
+    case elfcpp::R_390_TLS_GD32:
+    case elfcpp::R_390_TLS_GD64:
+    case elfcpp::R_390_TLS_GDCALL:
+      // These are General-Dynamic which permits fully general TLS
+      // access.  Since we know that we are generating an executable,
+      // we can convert this to Initial-Exec.  If we also know that
+      // this is a local symbol, we can further switch to Local-Exec.
+      if (is_final)
+	return tls::TLSOPT_TO_LE;
+      return tls::TLSOPT_TO_IE;
+
+    case elfcpp::R_390_TLS_LDM32:
+    case elfcpp::R_390_TLS_LDM64:
+    case elfcpp::R_390_TLS_LDO32:
+    case elfcpp::R_390_TLS_LDO64:
+    case elfcpp::R_390_TLS_LDCALL:
+      // This is Local-Dynamic, which refers to a local symbol in the
+      // dynamic TLS block.  Since we know that we generating an
+      // executable, we can switch to Local-Exec.
+      return tls::TLSOPT_TO_LE;
+
+    case elfcpp::R_390_TLS_IE32:
+    case elfcpp::R_390_TLS_IE64:
+    case elfcpp::R_390_TLS_GOTIE32:
+    case elfcpp::R_390_TLS_GOTIE64:
+    case elfcpp::R_390_TLS_LOAD:
+      // These are Initial-Exec relocs which get the thread offset
+      // from the GOT.  If we know that we are linking against the
+      // local symbol, we can switch to Local-Exec, which links the
+      // thread offset into the instruction.
+      if (is_final)
+	return tls::TLSOPT_TO_LE;
+      return tls::TLSOPT_NONE;
+
+    case elfcpp::R_390_TLS_GOTIE12:
+    case elfcpp::R_390_TLS_IEENT:
+    case elfcpp::R_390_TLS_GOTIE20:
+      // These are Initial-Exec, but cannot be optimized.
+      return tls::TLSOPT_NONE;
+
+    case elfcpp::R_390_TLS_LE32:
+    case elfcpp::R_390_TLS_LE64:
+      // When we already have Local-Exec, there is nothing further we
+      // can do.
+      return tls::TLSOPT_NONE;
+
+    default:
+      gold_unreachable();
+    }
+}
+
+// Get the Reference_flags for a particular relocation.
+
+template<int size>
+int
+Target_s390<size>::Scan::get_reference_flags(unsigned int r_type)
+{
+  switch (r_type)
+    {
+    case elfcpp::R_390_NONE:
+    case elfcpp::R_390_GNU_VTINHERIT:
+    case elfcpp::R_390_GNU_VTENTRY:
+    case elfcpp::R_390_GOTPC:
+    case elfcpp::R_390_GOTPCDBL:
+      // No symbol reference.
+      return 0;
+
+    case elfcpp::R_390_64:
+    case elfcpp::R_390_32:
+    case elfcpp::R_390_20:
+    case elfcpp::R_390_16:
+    case elfcpp::R_390_12:
+    case elfcpp::R_390_8:
+      return Symbol::ABSOLUTE_REF;
+
+    case elfcpp::R_390_PC12DBL:
+    case elfcpp::R_390_PC16:
+    case elfcpp::R_390_PC16DBL:
+    case elfcpp::R_390_PC24DBL:
+    case elfcpp::R_390_PC32:
+    case elfcpp::R_390_PC32DBL:
+    case elfcpp::R_390_PC64:
+    case elfcpp::R_390_GOTOFF16:
+    case elfcpp::R_390_GOTOFF32:
+    case elfcpp::R_390_GOTOFF64:
+      return Symbol::RELATIVE_REF;
+
+    case elfcpp::R_390_PLT12DBL:
+    case elfcpp::R_390_PLT16DBL:
+    case elfcpp::R_390_PLT24DBL:
+    case elfcpp::R_390_PLT32:
+    case elfcpp::R_390_PLT32DBL:
+    case elfcpp::R_390_PLT64:
+    case elfcpp::R_390_PLTOFF16:
+    case elfcpp::R_390_PLTOFF32:
+    case elfcpp::R_390_PLTOFF64:
+      return Symbol::FUNCTION_CALL | Symbol::RELATIVE_REF;
+
+    case elfcpp::R_390_GOT12:
+    case elfcpp::R_390_GOT16:
+    case elfcpp::R_390_GOT20:
+    case elfcpp::R_390_GOT32:
+    case elfcpp::R_390_GOT64:
+    case elfcpp::R_390_GOTENT:
+    case elfcpp::R_390_GOTPLT12:
+    case elfcpp::R_390_GOTPLT16:
+    case elfcpp::R_390_GOTPLT20:
+    case elfcpp::R_390_GOTPLT32:
+    case elfcpp::R_390_GOTPLT64:
+    case elfcpp::R_390_GOTPLTENT:
+      // Absolute in GOT.
+      return Symbol::ABSOLUTE_REF;
+
+    case elfcpp::R_390_TLS_GD32:          // Global-dynamic
+    case elfcpp::R_390_TLS_GD64:
+    case elfcpp::R_390_TLS_GDCALL:
+    case elfcpp::R_390_TLS_LDM32:         // Local-dynamic
+    case elfcpp::R_390_TLS_LDM64:
+    case elfcpp::R_390_TLS_LDO32:
+    case elfcpp::R_390_TLS_LDO64:
+    case elfcpp::R_390_TLS_LDCALL:
+    case elfcpp::R_390_TLS_IE32:          // Initial-exec
+    case elfcpp::R_390_TLS_IE64:
+    case elfcpp::R_390_TLS_IEENT:
+    case elfcpp::R_390_TLS_GOTIE12:
+    case elfcpp::R_390_TLS_GOTIE20:
+    case elfcpp::R_390_TLS_GOTIE32:
+    case elfcpp::R_390_TLS_GOTIE64:
+    case elfcpp::R_390_TLS_LOAD:
+    case elfcpp::R_390_TLS_LE32:          // Local-exec
+    case elfcpp::R_390_TLS_LE64:
+      return Symbol::TLS_REF;
+
+    case elfcpp::R_390_COPY:
+    case elfcpp::R_390_GLOB_DAT:
+    case elfcpp::R_390_JMP_SLOT:
+    case elfcpp::R_390_RELATIVE:
+    case elfcpp::R_390_IRELATIVE:
+    case elfcpp::R_390_TLS_TPOFF:
+    case elfcpp::R_390_TLS_DTPOFF:
+    case elfcpp::R_390_TLS_DTPMOD:
+    default:
+      // Not expected.  We will give an error later.
+      return 0;
+    }
+}
+
+// Report an unsupported relocation against a local symbol.
+
+template<int size>
+void
+Target_s390<size>::Scan::unsupported_reloc_local(
+     Sized_relobj_file<size, true>* object,
+     unsigned int r_type)
+{
+  gold_error(_("%s: unsupported reloc %u against local symbol"),
+	     object->name().c_str(), r_type);
+}
+
+// We are about to emit a dynamic relocation of type R_TYPE.  If the
+// dynamic linker does not support it, issue an error.
+
+template<int size>
+void
+Target_s390<size>::Scan::check_non_pic(Relobj* object, unsigned int r_type)
+{
+  gold_assert(r_type != elfcpp::R_390_NONE);
+
+  if (size == 64)
+    {
+      switch (r_type)
+	{
+	  // These are the relocation types supported by glibc for s390 64-bit.
+	case elfcpp::R_390_RELATIVE:
+	case elfcpp::R_390_IRELATIVE:
+	case elfcpp::R_390_COPY:
+	case elfcpp::R_390_GLOB_DAT:
+	case elfcpp::R_390_JMP_SLOT:
+	case elfcpp::R_390_TLS_DTPMOD:
+	case elfcpp::R_390_TLS_DTPOFF:
+	case elfcpp::R_390_TLS_TPOFF:
+	case elfcpp::R_390_8:
+	case elfcpp::R_390_16:
+	case elfcpp::R_390_32:
+	case elfcpp::R_390_64:
+	case elfcpp::R_390_PC16:
+	case elfcpp::R_390_PC16DBL:
+	case elfcpp::R_390_PC32:
+	case elfcpp::R_390_PC32DBL:
+	case elfcpp::R_390_PC64:
+	  return;
+
+	default:
+	  break;
+	}
+    }
+  else
+    {
+      switch (r_type)
+	{
+	  // These are the relocation types supported by glibc for s390 32-bit.
+	case elfcpp::R_390_RELATIVE:
+	case elfcpp::R_390_IRELATIVE:
+	case elfcpp::R_390_COPY:
+	case elfcpp::R_390_GLOB_DAT:
+	case elfcpp::R_390_JMP_SLOT:
+	case elfcpp::R_390_TLS_DTPMOD:
+	case elfcpp::R_390_TLS_DTPOFF:
+	case elfcpp::R_390_TLS_TPOFF:
+	case elfcpp::R_390_8:
+	case elfcpp::R_390_16:
+	case elfcpp::R_390_32:
+	case elfcpp::R_390_PC16:
+	case elfcpp::R_390_PC16DBL:
+	case elfcpp::R_390_PC32:
+	case elfcpp::R_390_PC32DBL:
+	  return;
+
+	default:
+	  break;
+	}
+    }
+
+  // This prevents us from issuing more than one error per reloc
+  // section.  But we can still wind up issuing more than one
+  // error per object file.
+  if (this->issued_non_pic_error_)
+    return;
+  gold_assert(parameters->options().output_is_position_independent());
+  object->error(_("requires unsupported dynamic reloc; "
+		  "recompile with -fPIC"));
+  this->issued_non_pic_error_ = true;
+  return;
+}
+
+// Return whether we need to make a PLT entry for a relocation of the
+// given type against a STT_GNU_IFUNC symbol.
+
+template<int size>
+bool
+Target_s390<size>::Scan::reloc_needs_plt_for_ifunc(
+     Sized_relobj_file<size, true>* object,
+     unsigned int r_type)
+{
+  int flags = Scan::get_reference_flags(r_type);
+  if (flags & Symbol::TLS_REF)
+    gold_error(_("%s: unsupported TLS reloc %u for IFUNC symbol"),
+	       object->name().c_str(), r_type);
+  return flags != 0;
+}
+
+// Scan a relocation for a local symbol.
+
+template<int size>
+inline void
+Target_s390<size>::Scan::local(Symbol_table* symtab,
+				 Layout* layout,
+				 Target_s390<size>* target,
+				 Sized_relobj_file<size, true>* object,
+				 unsigned int data_shndx,
+				 Output_section* output_section,
+				 const elfcpp::Rela<size, true>& reloc,
+				 unsigned int r_type,
+				 const elfcpp::Sym<size, true>& lsym,
+				 bool is_discarded)
+{
+  if (is_discarded)
+    return;
+
+  // A local STT_GNU_IFUNC symbol may require a PLT entry.
+  bool is_ifunc = lsym.get_st_type() == elfcpp::STT_GNU_IFUNC;
+
+  if (is_ifunc && this->reloc_needs_plt_for_ifunc(object, r_type))
+    {
+      unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info());
+      target->make_local_ifunc_plt_entry(symtab, layout, object, r_sym);
+    }
+
+  switch (r_type)
+    {
+    case elfcpp::R_390_NONE:
+    case elfcpp::R_390_GNU_VTINHERIT:
+    case elfcpp::R_390_GNU_VTENTRY:
+      break;
+
+    case elfcpp::R_390_64:
+      // If building a shared library (or a position-independent
+      // executable), we need to create a dynamic relocation for this
+      // location.  The relocation applied at link time will apply the
+      // link-time value, so we flag the location with an
+      // R_390_RELATIVE relocation so the dynamic loader can
+      // relocate it easily.
+      if (parameters->options().output_is_position_independent() && size == 64)
+	{
+	  unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info());
+	  Reloc_section* rela_dyn = target->rela_dyn_section(layout);
+	  rela_dyn->add_local_relative(object, r_sym,
+				       elfcpp::R_390_RELATIVE,
+				       output_section, data_shndx,
+				       reloc.get_r_offset(),
+				       reloc.get_r_addend(), is_ifunc);
+	}
+      break;
+
+    case elfcpp::R_390_32:
+    case elfcpp::R_390_20:
+    case elfcpp::R_390_16:
+    case elfcpp::R_390_12:
+    case elfcpp::R_390_8:
+      if (parameters->options().output_is_position_independent())
+	{
+	  if (size == 32 && r_type == elfcpp::R_390_32)
+	    {
+	      unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info());
+	      Reloc_section* rela_dyn = target->rela_dyn_section(layout);
+	      rela_dyn->add_local_relative(object, r_sym,
+					   elfcpp::R_390_RELATIVE,
+					   output_section, data_shndx,
+					   reloc.get_r_offset(),
+					   reloc.get_r_addend(), is_ifunc);
+	      break;
+	    }
+
+	  check_non_pic(object, r_type);
+
+	  Reloc_section* rela_dyn = target->rela_dyn_section(layout);
+	  unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info());
+	  if (lsym.get_st_type() != elfcpp::STT_SECTION)
+	    rela_dyn->add_local(object, r_sym, r_type, output_section,
+				data_shndx, reloc.get_r_offset(),
+				reloc.get_r_addend());
+	  else
+	    {
+	      gold_assert(lsym.get_st_value() == 0);
+	      unsigned int shndx = lsym.get_st_shndx();
+	      bool is_ordinary;
+	      shndx = object->adjust_sym_shndx(r_sym, shndx,
+					       &is_ordinary);
+	      if (!is_ordinary)
+		object->error(_("section symbol %u has bad shndx %u"),
+			      r_sym, shndx);
+	      else
+		rela_dyn->add_local_section(object, shndx,
+					    r_type, output_section,
+					    data_shndx, reloc.get_r_offset(),
+					    reloc.get_r_addend());
+	    }
+	}
+      break;
+
+    case elfcpp::R_390_PC12DBL:
+    case elfcpp::R_390_PC16:
+    case elfcpp::R_390_PC16DBL:
+    case elfcpp::R_390_PC24DBL:
+    case elfcpp::R_390_PC32:
+    case elfcpp::R_390_PC32DBL:
+    case elfcpp::R_390_PC64:
+      break;
+
+    case elfcpp::R_390_PLT12DBL:
+    case elfcpp::R_390_PLT16DBL:
+    case elfcpp::R_390_PLT24DBL:
+    case elfcpp::R_390_PLT32:
+    case elfcpp::R_390_PLT32DBL:
+    case elfcpp::R_390_PLT64:
+      // Since we know this is a local symbol, we can handle this as a
+      // PC32 reloc.
+      break;
+
+    case elfcpp::R_390_GOTPC:
+    case elfcpp::R_390_GOTPCDBL:
+    case elfcpp::R_390_GOTOFF16:
+    case elfcpp::R_390_GOTOFF32:
+    case elfcpp::R_390_GOTOFF64:
+    case elfcpp::R_390_PLTOFF16:
+    case elfcpp::R_390_PLTOFF32:
+    case elfcpp::R_390_PLTOFF64:
+      // We need a GOT section.
+      target->got_section(symtab, layout);
+      // For PLTOFF*, we'd normally want a PLT section, but since we
+      // know this is a local symbol, no PLT is needed.
+      break;
+
+    case elfcpp::R_390_GOT12:
+    case elfcpp::R_390_GOT16:
+    case elfcpp::R_390_GOT20:
+    case elfcpp::R_390_GOT32:
+    case elfcpp::R_390_GOT64:
+    case elfcpp::R_390_GOTENT:
+    case elfcpp::R_390_GOTPLT12:
+    case elfcpp::R_390_GOTPLT16:
+    case elfcpp::R_390_GOTPLT20:
+    case elfcpp::R_390_GOTPLT32:
+    case elfcpp::R_390_GOTPLT64:
+    case elfcpp::R_390_GOTPLTENT:
+      {
+	// The symbol requires a GOT section.
+	Output_data_got<size, true>* got = target->got_section(symtab, layout);
+
+	// The symbol requires a GOT entry.
+	unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info());
+
+	// For a STT_GNU_IFUNC symbol we want the PLT offset.  That
+	// lets function pointers compare correctly with shared
+	// libraries.  Otherwise we would need an IRELATIVE reloc.
+	bool is_new;
+	if (is_ifunc)
+	  is_new = got->add_local_plt(object, r_sym, GOT_TYPE_STANDARD);
+	else
+	  is_new = got->add_local(object, r_sym, GOT_TYPE_STANDARD);
+	if (is_new)
+	  {
+	    // If we are generating a shared object, we need to add a
+	    // dynamic relocation for this symbol's GOT entry.
+	    if (parameters->options().output_is_position_independent())
+	      {
+		Reloc_section* rela_dyn = target->rela_dyn_section(layout);
+		unsigned int got_offset =
+		  object->local_got_offset(r_sym, GOT_TYPE_STANDARD);
+		rela_dyn->add_local_relative(object, r_sym,
+					     elfcpp::R_390_RELATIVE,
+					     got, got_offset, 0, is_ifunc);
+	      }
+	  }
+	// For GOTPLT*, we'd normally want a PLT section, but since
+	// we know this is a local symbol, no PLT is needed.
+      }
+      break;
+
+    case elfcpp::R_390_COPY:
+    case elfcpp::R_390_GLOB_DAT:
+    case elfcpp::R_390_JMP_SLOT:
+    case elfcpp::R_390_RELATIVE:
+    case elfcpp::R_390_IRELATIVE:
+      // These are outstanding tls relocs, which are unexpected when linking
+    case elfcpp::R_390_TLS_TPOFF:
+    case elfcpp::R_390_TLS_DTPOFF:
+    case elfcpp::R_390_TLS_DTPMOD:
+      gold_error(_("%s: unexpected reloc %u in object file"),
+		 object->name().c_str(), r_type);
+      break;
+
+      // These are initial tls relocs, which are expected when linking
+    case elfcpp::R_390_TLS_GD32:          // Global-dynamic
+    case elfcpp::R_390_TLS_GD64:
+    case elfcpp::R_390_TLS_GDCALL:
+    case elfcpp::R_390_TLS_LDM32:         // Local-dynamic
+    case elfcpp::R_390_TLS_LDM64:
+    case elfcpp::R_390_TLS_LDO32:
+    case elfcpp::R_390_TLS_LDO64:
+    case elfcpp::R_390_TLS_LDCALL:
+    case elfcpp::R_390_TLS_IE32:          // Initial-exec
+    case elfcpp::R_390_TLS_IE64:
+    case elfcpp::R_390_TLS_IEENT:
+    case elfcpp::R_390_TLS_GOTIE12:
+    case elfcpp::R_390_TLS_GOTIE20:
+    case elfcpp::R_390_TLS_GOTIE32:
+    case elfcpp::R_390_TLS_GOTIE64:
+    case elfcpp::R_390_TLS_LOAD:
+    case elfcpp::R_390_TLS_LE32:          // Local-exec
+    case elfcpp::R_390_TLS_LE64:
+      {
+	bool output_is_shared = parameters->options().shared();
+	const tls::Tls_optimization optimized_type
+	    = Target_s390<size>::optimize_tls_reloc(!output_is_shared,
+						      r_type);
+	switch (r_type)
+	  {
+	  case elfcpp::R_390_TLS_GD32:       // General-dynamic
+	  case elfcpp::R_390_TLS_GD64:
+	  case elfcpp::R_390_TLS_GDCALL:
+	    if (optimized_type == tls::TLSOPT_NONE)
+	      {
+		// Create a pair of GOT entries for the module index and
+		// dtv-relative offset.
+		Output_data_got<size, true>* got
+		    = target->got_section(symtab, layout);
+		unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info());
+		unsigned int shndx = lsym.get_st_shndx();
+		bool is_ordinary;
+		shndx = object->adjust_sym_shndx(r_sym, shndx, &is_ordinary);
+		if (!is_ordinary)
+		  object->error(_("local symbol %u has bad shndx %u"),
+			      r_sym, shndx);
+		else
+		  got->add_local_pair_with_rel(object, r_sym,
+					       shndx,
+					       GOT_TYPE_TLS_PAIR,
+					       target->rela_dyn_section(layout),
+					       elfcpp::R_390_TLS_DTPMOD);
+	      }
+	    else if (optimized_type != tls::TLSOPT_TO_LE)
+	      unsupported_reloc_local(object, r_type);
+	    break;
+
+	  case elfcpp::R_390_TLS_LDM32:       // Local-dynamic
+	  case elfcpp::R_390_TLS_LDM64:
+	  case elfcpp::R_390_TLS_LDCALL:
+	    if (optimized_type == tls::TLSOPT_NONE)
+	      {
+		// Create a GOT entry for the module index.
+		target->got_mod_index_entry(symtab, layout, object);
+	      }
+	    else if (optimized_type != tls::TLSOPT_TO_LE)
+	      unsupported_reloc_local(object, r_type);
+	    break;
+
+	  case elfcpp::R_390_TLS_LDO32:
+	  case elfcpp::R_390_TLS_LDO64:
+	    break;
+
+	  case elfcpp::R_390_TLS_IE32:    // Initial-exec
+	  case elfcpp::R_390_TLS_IE64:
+	    // These two involve an absolute address
+	    if (parameters->options().shared()
+		&& optimized_type == tls::TLSOPT_NONE)
+	      {
+		if ((size == 32 && r_type == elfcpp::R_390_TLS_IE32) ||
+		    (size == 64 && r_type == elfcpp::R_390_TLS_IE64))
+		  {
+		    // We need to create a dynamic relocation.
+		    Reloc_section* rela_dyn = target->rela_dyn_section(layout);
+		    unsigned int r_sym =
+			elfcpp::elf_r_sym<size>(reloc.get_r_info());
+		    rela_dyn->add_local_relative(object, r_sym,
+						elfcpp::R_390_RELATIVE,
+						output_section, data_shndx,
+						reloc.get_r_offset(),
+						reloc.get_r_addend(), false);
+		  }
+		else
+		  {
+		    unsupported_reloc_local(object, r_type);
+		  }
+	      }
+	    // fall through
+	  case elfcpp::R_390_TLS_IEENT:
+	  case elfcpp::R_390_TLS_GOTIE12:
+	  case elfcpp::R_390_TLS_GOTIE20:
+	  case elfcpp::R_390_TLS_GOTIE32:
+	  case elfcpp::R_390_TLS_GOTIE64:
+	  case elfcpp::R_390_TLS_LOAD:
+	    layout->set_has_static_tls();
+	    if (optimized_type == tls::TLSOPT_NONE)
+	      {
+		if (!output_is_shared)
+		  {
+		    // We're making an executable, and the symbol is local, but
+		    // we cannot optimize to LE.  Make a const GOT entry instead.
+		    Output_data_got<size, true>* got
+			= target->got_section(symtab, layout);
+		    unsigned int r_sym
+			= elfcpp::elf_r_sym<size>(reloc.get_r_info());
+		    got->add_local_plt(object, r_sym, GOT_TYPE_TLS_OFFSET);
+		  }
+		else
+		{
+		  // Create a GOT entry for the tp-relative offset.
+		  Output_data_got<size, true>* got
+		      = target->got_section(symtab, layout);
+		  unsigned int r_sym
+		      = elfcpp::elf_r_sym<size>(reloc.get_r_info());
+		  got->add_local_with_rel(object, r_sym, GOT_TYPE_TLS_OFFSET,
+					  target->rela_dyn_section(layout),
+					  elfcpp::R_390_TLS_TPOFF);
+		}
+	      }
+	    else if (optimized_type != tls::TLSOPT_TO_LE)
+	      unsupported_reloc_local(object, r_type);
+	    break;
+
+	  case elfcpp::R_390_TLS_LE32:     // Local-exec
+	  case elfcpp::R_390_TLS_LE64:
+	    layout->set_has_static_tls();
+	    if (output_is_shared)
+	    {
+	      // We need to create a dynamic relocation.
+	      if ((size == 32 && r_type == elfcpp::R_390_TLS_LE32) ||
+	          (size == 64 && r_type == elfcpp::R_390_TLS_LE64))
+		{
+		  Reloc_section* rela_dyn = target->rela_dyn_section(layout);
+		  unsigned int r_sym
+		      = elfcpp::elf_r_sym<size>(reloc.get_r_info());
+		  gold_assert(lsym.get_st_type() != elfcpp::STT_SECTION);
+		  rela_dyn->add_local(object, r_sym, elfcpp::R_390_TLS_TPOFF,
+				      output_section, data_shndx,
+				      reloc.get_r_offset(),
+				      reloc.get_r_addend());
+		}
+	      else
+		{
+		  unsupported_reloc_local(object, r_type);
+		}
+	    }
+	    break;
+
+	  default:
+	    gold_unreachable();
+	  }
+      }
+      break;
+
+    default:
+      gold_error(_("%s: unsupported reloc %u against local symbol"),
+		 object->name().c_str(), r_type);
+      break;
+    }
+}
+
+// Scan a relocation for a global symbol.
+
+template<int size>
+inline void
+Target_s390<size>::Scan::global(Symbol_table* symtab,
+			    Layout* layout,
+			    Target_s390<size>* target,
+			    Sized_relobj_file<size, true>* object,
+			    unsigned int data_shndx,
+			    Output_section* output_section,
+			    const elfcpp::Rela<size, true>& reloc,
+			    unsigned int r_type,
+			    Symbol* gsym)
+{
+  // A STT_GNU_IFUNC symbol may require a PLT entry.
+  if (gsym->type() == elfcpp::STT_GNU_IFUNC
+      && this->reloc_needs_plt_for_ifunc(object, r_type))
+    target->make_plt_entry(symtab, layout, gsym);
+
+  switch (r_type)
+    {
+    case elfcpp::R_390_NONE:
+    case elfcpp::R_390_GNU_VTINHERIT:
+    case elfcpp::R_390_GNU_VTENTRY:
+      break;
+
+    case elfcpp::R_390_64:
+    case elfcpp::R_390_32:
+    case elfcpp::R_390_20:
+    case elfcpp::R_390_16:
+    case elfcpp::R_390_12:
+    case elfcpp::R_390_8:
+      {
+	// Make a PLT entry if necessary.
+	if (gsym->needs_plt_entry())
+	  {
+	    target->make_plt_entry(symtab, layout, gsym);
+	    // Since this is not a PC-relative relocation, we may be
+	    // taking the address of a function. In that case we need to
+	    // set the entry in the dynamic symbol table to the address of
+	    // the PLT entry.
+	    if (gsym->is_from_dynobj() && !parameters->options().shared())
+	      gsym->set_needs_dynsym_value();
+	  }
+	// Make a dynamic relocation if necessary.
+	if (gsym->needs_dynamic_reloc(Scan::get_reference_flags(r_type)))
+	  {
+	    if (!parameters->options().output_is_position_independent()
+		&& gsym->may_need_copy_reloc())
+	      {
+		target->copy_reloc(symtab, layout, object,
+				   data_shndx, output_section, gsym, reloc);
+	      }
+	    else if (((size == 64 && r_type == elfcpp::R_390_64)
+		      || (size == 32 && r_type == elfcpp::R_390_32))
+		     && gsym->type() == elfcpp::STT_GNU_IFUNC
+		     && gsym->can_use_relative_reloc(false)
+		     && !gsym->is_from_dynobj()
+		     && !gsym->is_undefined()
+		     && !gsym->is_preemptible())
+	      {
+		// Use an IRELATIVE reloc for a locally defined
+		// STT_GNU_IFUNC symbol.  This makes a function
+		// address in a PIE executable match the address in a
+		// shared library that it links against.
+		Reloc_section* rela_dyn =
+		  target->rela_irelative_section(layout);
+		unsigned int r_type = elfcpp::R_390_IRELATIVE;
+		rela_dyn->add_symbolless_global_addend(gsym, r_type,
+						       output_section, object,
+						       data_shndx,
+						       reloc.get_r_offset(),
+						       reloc.get_r_addend());
+	      }
+	    else if (((size == 64 && r_type == elfcpp::R_390_64)
+		      || (size == 32 && r_type == elfcpp::R_390_32))
+		     && gsym->can_use_relative_reloc(false))
+	      {
+		Reloc_section* rela_dyn = target->rela_dyn_section(layout);
+		rela_dyn->add_global_relative(gsym, elfcpp::R_390_RELATIVE,
+					      output_section, object,
+					      data_shndx,
+					      reloc.get_r_offset(),
+					      reloc.get_r_addend(), false);
+	      }
+	    else
+	      {
+		check_non_pic(object, r_type);
+		Reloc_section* rela_dyn = target->rela_dyn_section(layout);
+		rela_dyn->add_global(gsym, r_type, output_section, object,
+				     data_shndx, reloc.get_r_offset(),
+				     reloc.get_r_addend());
+	      }
+	  }
+      }
+      break;
+
+    case elfcpp::R_390_PC12DBL:
+    case elfcpp::R_390_PC16:
+    case elfcpp::R_390_PC16DBL:
+    case elfcpp::R_390_PC24DBL:
+    case elfcpp::R_390_PC32:
+    case elfcpp::R_390_PC32DBL:
+    case elfcpp::R_390_PC64:
+      {
+	// Make a PLT entry if necessary.
+	if (gsym->needs_plt_entry())
+	  {
+	    target->make_plt_entry(symtab, layout, gsym);
+	    // larl is often used to take address of a function.  Aim the
+	    // symbol at the PLT entry.
+	    if (gsym->is_from_dynobj() && !parameters->options().shared())
+	      gsym->set_needs_dynsym_value();
+	  }
+	// Make a dynamic relocation if necessary.
+	if (gsym->needs_dynamic_reloc(Scan::get_reference_flags(r_type)))
+	  {
+	    if (parameters->options().output_is_executable()
+		&& gsym->may_need_copy_reloc())
+	      {
+		target->copy_reloc(symtab, layout, object,
+				   data_shndx, output_section, gsym, reloc);
+	      }
+	    else
+	      {
+		check_non_pic(object, r_type);
+		Reloc_section* rela_dyn = target->rela_dyn_section(layout);
+		rela_dyn->add_global(gsym, r_type, output_section, object,
+				     data_shndx, reloc.get_r_offset(),
+				     reloc.get_r_addend());
+	      }
+	  }
+      }
+      break;
+
+    case elfcpp::R_390_PLT12DBL:
+    case elfcpp::R_390_PLT16DBL:
+    case elfcpp::R_390_PLT24DBL:
+    case elfcpp::R_390_PLT32:
+    case elfcpp::R_390_PLT32DBL:
+    case elfcpp::R_390_PLT64:
+      // If the symbol is fully resolved, this is just a PC32 reloc.
+      // Otherwise we need a PLT entry.
+      if (gsym->final_value_is_known())
+	break;
+      // If building a shared library, we can also skip the PLT entry
+      // if the symbol is defined in the output file and is protected
+      // or hidden.
+      if (gsym->is_defined()
+	  && !gsym->is_from_dynobj()
+	  && !gsym->is_preemptible())
+	break;
+      target->make_plt_entry(symtab, layout, gsym);
+      break;
+
+    case elfcpp::R_390_GOTPC:
+    case elfcpp::R_390_GOTPCDBL:
+    case elfcpp::R_390_GOTOFF16:
+    case elfcpp::R_390_GOTOFF32:
+    case elfcpp::R_390_GOTOFF64:
+    case elfcpp::R_390_PLTOFF16:
+    case elfcpp::R_390_PLTOFF32:
+    case elfcpp::R_390_PLTOFF64:
+      // We need a GOT section.
+      target->got_section(symtab, layout);
+      // For PLTOFF*, we also need a PLT entry (but only if the
+      // symbol is not fully resolved).
+      if ((r_type == elfcpp::R_390_PLTOFF16
+           || r_type == elfcpp::R_390_PLTOFF32
+	   || r_type == elfcpp::R_390_PLTOFF64)
+	  && !gsym->final_value_is_known())
+	target->make_plt_entry(symtab, layout, gsym);
+      break;
+
+    case elfcpp::R_390_GOT12:
+    case elfcpp::R_390_GOT16:
+    case elfcpp::R_390_GOT20:
+    case elfcpp::R_390_GOT32:
+    case elfcpp::R_390_GOT64:
+    case elfcpp::R_390_GOTENT:
+    case elfcpp::R_390_GOTPLT12:
+    case elfcpp::R_390_GOTPLT16:
+    case elfcpp::R_390_GOTPLT20:
+    case elfcpp::R_390_GOTPLT32:
+    case elfcpp::R_390_GOTPLT64:
+    case elfcpp::R_390_GOTPLTENT:
+      {
+	// The symbol requires a GOT entry.
+	Output_data_got<size, true>* got = target->got_section(symtab, layout);
+
+	if (gsym->final_value_is_known())
+	  {
+	    // For a STT_GNU_IFUNC symbol we want the PLT address.
+	    if (gsym->type() == elfcpp::STT_GNU_IFUNC)
+	      got->add_global_plt(gsym, GOT_TYPE_STANDARD);
+	    else
+	      got->add_global(gsym, GOT_TYPE_STANDARD);
+	  }
+	else
+	  {
+	    // If this symbol is not fully resolved, we need to add a
+	    // dynamic relocation for it.
+	    Reloc_section* rela_dyn = target->rela_dyn_section(layout);
+
+	    // Use a GLOB_DAT rather than a RELATIVE reloc if:
+	    //
+	    // 1) The symbol may be defined in some other module.
+	    //
+	    // 2) We are building a shared library and this is a
+	    // protected symbol; using GLOB_DAT means that the dynamic
+	    // linker can use the address of the PLT in the main
+	    // executable when appropriate so that function address
+	    // comparisons work.
+	    //
+	    // 3) This is a STT_GNU_IFUNC symbol in position dependent
+	    // code, again so that function address comparisons work.
+	    if (gsym->is_from_dynobj()
+		|| gsym->is_undefined()
+		|| gsym->is_preemptible()
+		|| (gsym->visibility() == elfcpp::STV_PROTECTED
+		    && parameters->options().shared())
+		|| (gsym->type() == elfcpp::STT_GNU_IFUNC
+		    && parameters->options().output_is_position_independent()))
+	      got->add_global_with_rel(gsym, GOT_TYPE_STANDARD, rela_dyn,
+				       elfcpp::R_390_GLOB_DAT);
+	    else
+	      {
+		// For a STT_GNU_IFUNC symbol we want to write the PLT
+		// offset into the GOT, so that function pointer
+		// comparisons work correctly.
+		bool is_new;
+		if (gsym->type() != elfcpp::STT_GNU_IFUNC)
+		  is_new = got->add_global(gsym, GOT_TYPE_STANDARD);
+		else
+		  {
+		    is_new = got->add_global_plt(gsym, GOT_TYPE_STANDARD);
+		    // Tell the dynamic linker to use the PLT address
+		    // when resolving relocations.
+		    if (gsym->is_from_dynobj()
+			&& !parameters->options().shared())
+		      gsym->set_needs_dynsym_value();
+		  }
+		if (is_new)
+		  {
+		    unsigned int got_off = gsym->got_offset(GOT_TYPE_STANDARD);
+		    rela_dyn->add_global_relative(gsym,
+						  elfcpp::R_390_RELATIVE,
+						  got, got_off, 0, false);
+		  }
+	      }
+	  }
+      }
+      break;
+
+    case elfcpp::R_390_COPY:
+    case elfcpp::R_390_GLOB_DAT:
+    case elfcpp::R_390_JMP_SLOT:
+    case elfcpp::R_390_RELATIVE:
+    case elfcpp::R_390_IRELATIVE:
+      // These are outstanding tls relocs, which are unexpected when linking
+    case elfcpp::R_390_TLS_TPOFF:
+    case elfcpp::R_390_TLS_DTPOFF:
+    case elfcpp::R_390_TLS_DTPMOD:
+      gold_error(_("%s: unexpected reloc %u in object file"),
+		 object->name().c_str(), r_type);
+      break;
+
+      // These are initial tls relocs, which are expected for global()
+    case elfcpp::R_390_TLS_GD32:          // Global-dynamic
+    case elfcpp::R_390_TLS_GD64:
+    case elfcpp::R_390_TLS_GDCALL:
+    case elfcpp::R_390_TLS_LDM32:         // Local-dynamic
+    case elfcpp::R_390_TLS_LDM64:
+    case elfcpp::R_390_TLS_LDO32:
+    case elfcpp::R_390_TLS_LDO64:
+    case elfcpp::R_390_TLS_LDCALL:
+    case elfcpp::R_390_TLS_IE32:          // Initial-exec
+    case elfcpp::R_390_TLS_IE64:
+    case elfcpp::R_390_TLS_IEENT:
+    case elfcpp::R_390_TLS_GOTIE12:
+    case elfcpp::R_390_TLS_GOTIE20:
+    case elfcpp::R_390_TLS_GOTIE32:
+    case elfcpp::R_390_TLS_GOTIE64:
+    case elfcpp::R_390_TLS_LOAD:
+    case elfcpp::R_390_TLS_LE32:          // Local-exec
+    case elfcpp::R_390_TLS_LE64:
+      {
+	// For the optimizable Initial-Exec model, we can treat undef symbols
+	// as final when building an executable.
+	const bool is_final = (gsym->final_value_is_known() ||
+			       ((r_type == elfcpp::R_390_TLS_IE32 ||
+			         r_type == elfcpp::R_390_TLS_IE64 ||
+			         r_type == elfcpp::R_390_TLS_GOTIE32 ||
+			         r_type == elfcpp::R_390_TLS_GOTIE64) &&
+			        gsym->is_undefined() &&
+				parameters->options().output_is_executable()));
+	const tls::Tls_optimization optimized_type
+	    = Target_s390<size>::optimize_tls_reloc(is_final, r_type);
+	switch (r_type)
+	  {
+	  case elfcpp::R_390_TLS_GD32:       // General-dynamic
+	  case elfcpp::R_390_TLS_GD64:
+	  case elfcpp::R_390_TLS_GDCALL:
+	    if (optimized_type == tls::TLSOPT_NONE)
+	      {
+		// Create a pair of GOT entries for the module index and
+		// dtv-relative offset.
+		Output_data_got<size, true>* got
+		    = target->got_section(symtab, layout);
+		got->add_global_pair_with_rel(gsym, GOT_TYPE_TLS_PAIR,
+					      target->rela_dyn_section(layout),
+					      elfcpp::R_390_TLS_DTPMOD,
+					      elfcpp::R_390_TLS_DTPOFF);
+	      }
+	    else if (optimized_type == tls::TLSOPT_TO_IE)
+	      {
+		// Create a GOT entry for the tp-relative offset.
+		Output_data_got<size, true>* got
+		    = target->got_section(symtab, layout);
+		got->add_global_with_rel(gsym, GOT_TYPE_TLS_OFFSET,
+					 target->rela_dyn_section(layout),
+					 elfcpp::R_390_TLS_TPOFF);
+	      }
+	    else if (optimized_type != tls::TLSOPT_TO_LE)
+	      unsupported_reloc_global(object, r_type, gsym);
+	    break;
+
+	  case elfcpp::R_390_TLS_LDM32:       // Local-dynamic
+	  case elfcpp::R_390_TLS_LDM64:
+	  case elfcpp::R_390_TLS_LDCALL:
+	    if (optimized_type == tls::TLSOPT_NONE)
+	      {
+		// Create a GOT entry for the module index.
+		target->got_mod_index_entry(symtab, layout, object);
+	      }
+	    else if (optimized_type != tls::TLSOPT_TO_LE)
+	      unsupported_reloc_global(object, r_type, gsym);
+	    break;
+
+	  case elfcpp::R_390_TLS_LDO32:
+	  case elfcpp::R_390_TLS_LDO64:
+	    break;
+
+	  case elfcpp::R_390_TLS_IE32:    // Initial-exec
+	  case elfcpp::R_390_TLS_IE64:
+	    // These two involve an absolute address
+	    if (parameters->options().shared())
+	      {
+		if ((size == 32 && r_type == elfcpp::R_390_TLS_IE32) ||
+		    (size == 64 && r_type == elfcpp::R_390_TLS_IE64))
+		  {
+		    // We need to create a dynamic relocation.
+		    Reloc_section* rela_dyn = target->rela_dyn_section(layout);
+		    rela_dyn->add_global_relative(gsym, elfcpp::R_390_RELATIVE,
+						  output_section, object,
+						  data_shndx,
+						  reloc.get_r_offset(),
+						  reloc.get_r_addend(), false);
+		  }
+		else
+		  {
+		    unsupported_reloc_global(object, r_type, gsym);
+		  }
+	      }
+	    // fall through
+	  case elfcpp::R_390_TLS_IEENT:
+	  case elfcpp::R_390_TLS_GOTIE12:
+	  case elfcpp::R_390_TLS_GOTIE20:
+	  case elfcpp::R_390_TLS_GOTIE32:
+	  case elfcpp::R_390_TLS_GOTIE64:
+	  case elfcpp::R_390_TLS_LOAD:
+	    layout->set_has_static_tls();
+	    if (optimized_type == tls::TLSOPT_NONE)
+	      {
+		if (is_final && !parameters->options().shared())
+		  {
+		    // We're making an executable, and the symbol is local, but
+		    // we cannot optimize to LE.  Make a const GOT entry instead.
+		    Output_data_got<size, true>* got
+			= target->got_section(symtab, layout);
+		    got->add_global_plt(gsym, GOT_TYPE_TLS_OFFSET);
+		  }
+		else
+		  {
+		    // Create a GOT entry for the tp-relative offset.
+		    Output_data_got<size, true>* got
+			= target->got_section(symtab, layout);
+		    got->add_global_with_rel(gsym, GOT_TYPE_TLS_OFFSET,
+					     target->rela_dyn_section(layout),
+					     elfcpp::R_390_TLS_TPOFF);
+		  }
+	      }
+	    else if (optimized_type != tls::TLSOPT_TO_LE)
+	      unsupported_reloc_global(object, r_type, gsym);
+	    break;
+
+	  case elfcpp::R_390_TLS_LE32:     // Local-exec
+	  case elfcpp::R_390_TLS_LE64:
+	    layout->set_has_static_tls();
+	    if (parameters->options().shared())
+	      {
+		// We need to create a dynamic relocation.
+		if ((size == 32 && r_type == elfcpp::R_390_TLS_LE32) ||
+		    (size == 64 && r_type == elfcpp::R_390_TLS_LE64))
+		  {
+		    Reloc_section* rela_dyn = target->rela_dyn_section(layout);
+		    rela_dyn->add_global(gsym, elfcpp::R_390_TLS_TPOFF,
+					 output_section, object,
+					 data_shndx, reloc.get_r_offset(),
+					 reloc.get_r_addend());
+		  }
+		else
+		  {
+		    unsupported_reloc_global(object, r_type, gsym);
+		  }
+	      }
+	    break;
+
+	  default:
+	    gold_unreachable();
+	  }
+      }
+      break;
+
+    default:
+      gold_error(_("%s: unsupported reloc %u against global symbol %s"),
+		 object->name().c_str(), r_type,
+		 gsym->demangled_name().c_str());
+      break;
+    }
+}
+
+
+// Report an unsupported relocation against a global symbol.
+
+template<int size>
+void
+Target_s390<size>::Scan::unsupported_reloc_global(
+    Sized_relobj_file<size, true>* object,
+    unsigned int r_type,
+    Symbol* gsym)
+{
+  gold_error(_("%s: unsupported reloc %u against global symbol %s"),
+	     object->name().c_str(), r_type, gsym->demangled_name().c_str());
+}
+
+// Returns true if this relocation type could be that of a function pointer.
+template<int size>
+inline bool
+Target_s390<size>::Scan::possible_function_pointer_reloc(unsigned int r_type)
+{
+  switch (r_type)
+    {
+    case elfcpp::R_390_32:
+    case elfcpp::R_390_64:
+    case elfcpp::R_390_PC32DBL: // could be used by larl insn
+    case elfcpp::R_390_GOT12:
+    case elfcpp::R_390_GOT16:
+    case elfcpp::R_390_GOT20:
+    case elfcpp::R_390_GOT32:
+    case elfcpp::R_390_GOT64:
+    case elfcpp::R_390_GOTENT:
+    case elfcpp::R_390_GOTOFF16:
+    case elfcpp::R_390_GOTOFF32:
+    case elfcpp::R_390_GOTOFF64:
+      return true;
+    }
+  return false;
+}
+
+// For safe ICF, scan a relocation for a local symbol to check if it
+// corresponds to a function pointer being taken.  In that case mark
+// the function whose pointer was taken as not foldable.
+
+template<int size>
+inline bool
+Target_s390<size>::Scan::local_reloc_may_be_function_pointer(
+  Symbol_table* ,
+  Layout* ,
+  Target_s390<size>* ,
+  Sized_relobj_file<size, true>* ,
+  unsigned int ,
+  Output_section* ,
+  const elfcpp::Rela<size, true>& ,
+  unsigned int r_type,
+  const elfcpp::Sym<size, true>&)
+{
+  // When building a shared library, do not fold any local symbols.
+  return (parameters->options().shared()
+	  || possible_function_pointer_reloc(r_type));
+}
+
+// For safe ICF, scan a relocation for a global symbol to check if it
+// corresponds to a function pointer being taken.  In that case mark
+// the function whose pointer was taken as not foldable.
+
+template<int size>
+inline bool
+Target_s390<size>::Scan::global_reloc_may_be_function_pointer(
+  Symbol_table*,
+  Layout* ,
+  Target_s390<size>* ,
+  Sized_relobj_file<size, true>* ,
+  unsigned int ,
+  Output_section* ,
+  const elfcpp::Rela<size, true>& ,
+  unsigned int r_type,
+  Symbol* gsym)
+{
+  // When building a shared library, do not fold symbols whose visibility
+  // is hidden, internal or protected.
+  return ((parameters->options().shared()
+	   && (gsym->visibility() == elfcpp::STV_INTERNAL
+	       || gsym->visibility() == elfcpp::STV_PROTECTED
+	       || gsym->visibility() == elfcpp::STV_HIDDEN))
+	  || possible_function_pointer_reloc(r_type));
+}
+
+template<int size>
+void
+Target_s390<size>::gc_process_relocs(Symbol_table* symtab,
+				       Layout* layout,
+				       Sized_relobj_file<size, true>* object,
+				       unsigned int data_shndx,
+				       unsigned int sh_type,
+				       const unsigned char* prelocs,
+				       size_t reloc_count,
+				       Output_section* output_section,
+				       bool needs_special_offset_handling,
+				       size_t local_symbol_count,
+				       const unsigned char* plocal_symbols)
+{
+
+  if (sh_type == elfcpp::SHT_REL)
+    return;
+
+  gold::gc_process_relocs<size, true, Target_s390<size>, elfcpp::SHT_RELA,
+			  typename Target_s390<size>::Scan,
+			  typename Target_s390<size>::Relocatable_size_for_reloc>(
+    symtab,
+    layout,
+    this,
+    object,
+    data_shndx,
+    prelocs,
+    reloc_count,
+    output_section,
+    needs_special_offset_handling,
+    local_symbol_count,
+    plocal_symbols);
+}
+
+// Perform a relocation.
+
+template<int size>
+inline bool
+Target_s390<size>::Relocate::relocate(
+    const Relocate_info<size, true>* relinfo,
+    Target_s390<size>* target,
+    Output_section*,
+    size_t relnum,
+    const elfcpp::Rela<size, true>& rela,
+    unsigned int r_type,
+    const Sized_symbol<size>* gsym,
+    const Symbol_value<size>* psymval,
+    unsigned char* view,
+    typename elfcpp::Elf_types<size>::Elf_Addr address,
+    section_size_type view_size)
+{
+  if (view == NULL)
+    return true;
+
+  const Sized_relobj_file<size, true>* object = relinfo->object;
+
+  // Pick the value to use for symbols defined in the PLT.
+  Symbol_value<size> symval;
+  if (gsym != NULL
+      && gsym->use_plt_offset(Scan::get_reference_flags(r_type)))
+    {
+      symval.set_output_value(target->plt_address_for_global(gsym));
+      psymval = &symval;
+    }
+  else if (gsym == NULL && psymval->is_ifunc_symbol())
+    {
+      unsigned int r_sym = elfcpp::elf_r_sym<size>(rela.get_r_info());
+      if (object->local_has_plt_offset(r_sym))
+	{
+	  symval.set_output_value(target->plt_address_for_local(object, r_sym));
+	  psymval = &symval;
+	}
+    }
+
+  const elfcpp::Elf_Xword addend = rela.get_r_addend();
+
+  typename elfcpp::Elf_types<size>::Elf_Addr value = 0;
+
+  switch (r_type)
+    {
+    case elfcpp::R_390_PLT64:
+    case elfcpp::R_390_PLT32:
+    case elfcpp::R_390_PLT32DBL:
+    case elfcpp::R_390_PLT24DBL:
+    case elfcpp::R_390_PLT16DBL:
+    case elfcpp::R_390_PLT12DBL:
+      gold_assert(gsym == NULL
+		  || gsym->has_plt_offset()
+		  || gsym->final_value_is_known()
+		  || (gsym->is_defined()
+		      && !gsym->is_from_dynobj()
+		      && !gsym->is_preemptible()));
+      // fallthru
+    case elfcpp::R_390_8:
+    case elfcpp::R_390_12:
+    case elfcpp::R_390_16:
+    case elfcpp::R_390_20:
+    case elfcpp::R_390_32:
+    case elfcpp::R_390_64:
+    case elfcpp::R_390_PC16:
+    case elfcpp::R_390_PC32:
+    case elfcpp::R_390_PC64:
+    case elfcpp::R_390_PC32DBL:
+    case elfcpp::R_390_PC24DBL:
+    case elfcpp::R_390_PC16DBL:
+    case elfcpp::R_390_PC12DBL:
+      value = psymval->value(object, addend);
+      break;
+
+    case elfcpp::R_390_GOTPC:
+    case elfcpp::R_390_GOTPCDBL:
+      gold_assert(gsym != NULL);
+      value = target->got_address() + addend;
+      break;
+
+    case elfcpp::R_390_PLTOFF64:
+    case elfcpp::R_390_PLTOFF32:
+    case elfcpp::R_390_PLTOFF16:
+      gold_assert(gsym == NULL
+		  || gsym->has_plt_offset()
+		  || gsym->final_value_is_known());
+      // fallthru
+    case elfcpp::R_390_GOTOFF64:
+    case elfcpp::R_390_GOTOFF32:
+    case elfcpp::R_390_GOTOFF16:
+      value = (psymval->value(object, addend)
+	       - target->got_address());
+      break;
+
+    case elfcpp::R_390_GOT12:
+    case elfcpp::R_390_GOT16:
+    case elfcpp::R_390_GOT20:
+    case elfcpp::R_390_GOT32:
+    case elfcpp::R_390_GOT64:
+    case elfcpp::R_390_GOTENT:
+    case elfcpp::R_390_GOTPLT12:
+    case elfcpp::R_390_GOTPLT16:
+    case elfcpp::R_390_GOTPLT20:
+    case elfcpp::R_390_GOTPLT32:
+    case elfcpp::R_390_GOTPLT64:
+    case elfcpp::R_390_GOTPLTENT:
+      {
+        unsigned int got_offset = 0;
+        if (gsym != NULL)
+	  {
+	    gold_assert(gsym->has_got_offset(GOT_TYPE_STANDARD));
+	    got_offset = gsym->got_offset(GOT_TYPE_STANDARD);
+	  }
+        else
+	  {
+	    unsigned int r_sym = elfcpp::elf_r_sym<size>(rela.get_r_info());
+	    gold_assert(object->local_has_got_offset(r_sym, GOT_TYPE_STANDARD));
+	    got_offset = object->local_got_offset(r_sym, GOT_TYPE_STANDARD);
+	  }
+        value = got_offset + target->got_main_offset() + addend;
+      }
+      break;
+
+      // These are initial tls relocs, which are expected when linking
+    case elfcpp::R_390_TLS_LOAD:
+    case elfcpp::R_390_TLS_GDCALL:          // Global-dynamic
+    case elfcpp::R_390_TLS_GD32:
+    case elfcpp::R_390_TLS_GD64:
+    case elfcpp::R_390_TLS_LDCALL:          // Local-dynamic
+    case elfcpp::R_390_TLS_LDM32:
+    case elfcpp::R_390_TLS_LDM64:
+    case elfcpp::R_390_TLS_LDO32:
+    case elfcpp::R_390_TLS_LDO64:
+    case elfcpp::R_390_TLS_GOTIE12:         // Initial-exec
+    case elfcpp::R_390_TLS_GOTIE20:
+    case elfcpp::R_390_TLS_GOTIE32:
+    case elfcpp::R_390_TLS_GOTIE64:
+    case elfcpp::R_390_TLS_IE32:
+    case elfcpp::R_390_TLS_IE64:
+    case elfcpp::R_390_TLS_IEENT:
+    case elfcpp::R_390_TLS_LE32:            // Local-exec
+    case elfcpp::R_390_TLS_LE64:
+      value = this->relocate_tls(relinfo, target, relnum, rela, r_type, gsym, psymval,
+			 view, view_size);
+      break;
+
+    default:
+      break;
+    }
+
+  typename S390_relocate_functions<size>::Status status
+      = S390_relocate_functions<size>::STATUS_OK;
+
+  switch (r_type)
+    {
+    case elfcpp::R_390_NONE:
+    case elfcpp::R_390_GNU_VTINHERIT:
+    case elfcpp::R_390_GNU_VTENTRY:
+    case elfcpp::R_390_TLS_GDCALL:
+    case elfcpp::R_390_TLS_LDCALL:
+    case elfcpp::R_390_TLS_LOAD:
+      break;
+
+    case elfcpp::R_390_64:
+    case elfcpp::R_390_GOT64:
+    case elfcpp::R_390_GOTPLT64:
+    case elfcpp::R_390_PLTOFF64:
+    case elfcpp::R_390_GOTOFF64:
+    case elfcpp::R_390_TLS_GD64:
+    case elfcpp::R_390_TLS_LDM64:
+    case elfcpp::R_390_TLS_LDO64:
+    case elfcpp::R_390_TLS_GOTIE64:
+    case elfcpp::R_390_TLS_IE64:
+    case elfcpp::R_390_TLS_LE64:
+      Relocate_functions<size, true>::rela64(view, value, 0);
+      break;
+
+    case elfcpp::R_390_32:
+    case elfcpp::R_390_GOT32:
+    case elfcpp::R_390_GOTPLT32:
+    case elfcpp::R_390_PLTOFF32:
+    case elfcpp::R_390_GOTOFF32:
+    case elfcpp::R_390_TLS_GD32:
+    case elfcpp::R_390_TLS_LDM32:
+    case elfcpp::R_390_TLS_LDO32:
+    case elfcpp::R_390_TLS_GOTIE32:
+    case elfcpp::R_390_TLS_IE32:
+    case elfcpp::R_390_TLS_LE32:
+      Relocate_functions<size, true>::rela32(view, value, 0);
+      break;
+
+    case elfcpp::R_390_20:
+    case elfcpp::R_390_GOT20:
+    case elfcpp::R_390_GOTPLT20:
+    case elfcpp::R_390_TLS_GOTIE20:
+      status = S390_relocate_functions<size>::rela20(view, value);
+      break;
+
+    case elfcpp::R_390_16:
+    case elfcpp::R_390_GOT16:
+    case elfcpp::R_390_GOTPLT16:
+    case elfcpp::R_390_PLTOFF16:
+    case elfcpp::R_390_GOTOFF16:
+      status = S390_relocate_functions<size>::rela16(view, value);
+      break;
+
+    case elfcpp::R_390_12:
+    case elfcpp::R_390_GOT12:
+    case elfcpp::R_390_GOTPLT12:
+    case elfcpp::R_390_TLS_GOTIE12:
+      status = S390_relocate_functions<size>::rela12(view, value);
+      break;
+
+    case elfcpp::R_390_8:
+      Relocate_functions<size, true>::rela8(view, value, 0);
+      break;
+
+    case elfcpp::R_390_PC16:
+      Relocate_functions<size, true>::pcrela16(view, value, 0,
+					       address);
+      break;
+
+    case elfcpp::R_390_PLT64:
+    case elfcpp::R_390_PC64:
+      Relocate_functions<size, true>::pcrela64(view, value, 0, address);
+      break;
+
+    case elfcpp::R_390_PLT32:
+    case elfcpp::R_390_PC32:
+    case elfcpp::R_390_GOTPC:
+      Relocate_functions<size, true>::pcrela32(view, value, 0, address);
+      break;
+
+    case elfcpp::R_390_PLT32DBL:
+    case elfcpp::R_390_PC32DBL:
+    case elfcpp::R_390_GOTPCDBL:
+      status = S390_relocate_functions<size>::pcrela32dbl(view, value, address);
+      break;
+
+    case elfcpp::R_390_PLT24DBL:
+    case elfcpp::R_390_PC24DBL:
+      status = S390_relocate_functions<size>::pcrela24dbl(view, value, address);
+      break;
+
+    case elfcpp::R_390_PLT16DBL:
+    case elfcpp::R_390_PC16DBL:
+      status = S390_relocate_functions<size>::pcrela16dbl(view, value, address);
+      break;
+
+    case elfcpp::R_390_PLT12DBL:
+    case elfcpp::R_390_PC12DBL:
+      status = S390_relocate_functions<size>::pcrela12dbl(view, value, address);
+      break;
+
+    case elfcpp::R_390_GOTENT:
+    case elfcpp::R_390_GOTPLTENT:
+    case elfcpp::R_390_TLS_IEENT:
+      value += target->got_address();
+      status = S390_relocate_functions<size>::pcrela32dbl(view, value, address);
+      break;
+
+    case elfcpp::R_390_COPY:
+    case elfcpp::R_390_GLOB_DAT:
+    case elfcpp::R_390_JMP_SLOT:
+    case elfcpp::R_390_RELATIVE:
+    case elfcpp::R_390_IRELATIVE:
+      // These are outstanding tls relocs, which are unexpected when linking
+    case elfcpp::R_390_TLS_TPOFF:
+    case elfcpp::R_390_TLS_DTPMOD:
+    case elfcpp::R_390_TLS_DTPOFF:
+      gold_error_at_location(relinfo, relnum, rela.get_r_offset(),
+			     _("unexpected reloc %u in object file"),
+			     r_type);
+      break;
+
+    default:
+      gold_error_at_location(relinfo, relnum, rela.get_r_offset(),
+			     _("unsupported reloc %u"),
+			     r_type);
+      break;
+    }
+
+  if (status != S390_relocate_functions<size>::STATUS_OK)
+    {
+      gold_error_at_location(relinfo, relnum, rela.get_r_offset(),
+			     _("relocation overflow"));
+    }
+
+  return true;
+}
+
+// Perform a TLS relocation.
+
+template<int size>
+inline typename elfcpp::Elf_types<size>::Elf_Addr
+Target_s390<size>::Relocate::relocate_tls(
+    const Relocate_info<size, true>* relinfo,
+    Target_s390<size>* target,
+    size_t relnum,
+    const elfcpp::Rela<size, true>& rela,
+    unsigned int r_type,
+    const Sized_symbol<size>* gsym,
+    const Symbol_value<size>* psymval,
+    unsigned char* view,
+    section_size_type view_size)
+{
+  Output_segment* tls_segment = relinfo->layout->tls_segment();
+
+  const Sized_relobj_file<size, true>* object = relinfo->object;
+  const elfcpp::Elf_Xword addend = rela.get_r_addend();
+  elfcpp::Shdr<size, true> data_shdr(relinfo->data_shdr);
+  bool is_allocatable = (data_shdr.get_sh_flags() & elfcpp::SHF_ALLOC) != 0;
+
+  typename elfcpp::Elf_types<size>::Elf_Addr value
+      = psymval->value(relinfo->object, addend);
+
+  const bool is_final = (gsym == NULL
+			 ? !parameters->options().shared()
+			 : gsym->final_value_is_known());
+  tls::Tls_optimization optimized_type
+      = Target_s390<size>::optimize_tls_reloc(is_final, r_type);
+  switch (r_type)
+    {
+    case elfcpp::R_390_TLS_GDCALL:            // Global-dynamic marker
+      if (optimized_type == tls::TLSOPT_TO_LE)
+	{
+	  if (tls_segment == NULL)
+	    {
+	      gold_assert(parameters->errors()->error_count() > 0
+			  || issue_undefined_symbol_error(gsym));
+	      return 0;
+	    }
+	  this->tls_gd_to_le(relinfo, relnum, rela, view, view_size);
+	  break;
+	}
+      else
+	{
+	  if (optimized_type == tls::TLSOPT_TO_IE)
+	    {
+	      this->tls_gd_to_ie(relinfo, relnum, rela, view, view_size);
+	      break;
+	    }
+	  else if (optimized_type == tls::TLSOPT_NONE)
+	    {
+	      break;
+	    }
+	}
+      gold_error_at_location(relinfo, relnum, rela.get_r_offset(),
+			     _("unsupported reloc %u"), r_type);
+      break;
+
+    case elfcpp::R_390_TLS_GD32:            // Global-dynamic
+    case elfcpp::R_390_TLS_GD64:
+      if (optimized_type == tls::TLSOPT_TO_LE)
+	{
+	  if (tls_segment == NULL)
+	    {
+	      gold_assert(parameters->errors()->error_count() > 0
+			  || issue_undefined_symbol_error(gsym));
+	      return 0;
+	    }
+	  return value - tls_segment->memsz();
+	}
+      else
+	{
+	  unsigned int got_type = (optimized_type == tls::TLSOPT_TO_IE
+				   ? GOT_TYPE_TLS_OFFSET
+				   : GOT_TYPE_TLS_PAIR);
+	  if (gsym != NULL)
+	    {
+	      gold_assert(gsym->has_got_offset(got_type));
+	      return (gsym->got_offset(got_type)
+		      + target->got_main_offset()
+		      + addend);
+	    }
+	  else
+	    {
+	      unsigned int r_sym = elfcpp::elf_r_sym<size>(rela.get_r_info());
+	      gold_assert(object->local_has_got_offset(r_sym, got_type));
+	      return (object->local_got_offset(r_sym, got_type)
+		      + target->got_main_offset()
+		      + addend);
+	    }
+	}
+      gold_error_at_location(relinfo, relnum, rela.get_r_offset(),
+			     _("unsupported reloc %u"), r_type);
+      break;
+
+    case elfcpp::R_390_TLS_LDCALL:            // Local-dynamic marker
+      // This is a marker relocation. If the sequence is being turned to LE,
+      // we modify the instruction, otherwise the instruction is untouched.
+      if (optimized_type == tls::TLSOPT_TO_LE)
+	{
+	  if (tls_segment == NULL)
+	    {
+	      gold_assert(parameters->errors()->error_count() > 0
+			  || issue_undefined_symbol_error(gsym));
+	      return 0;
+	    }
+	  this->tls_ld_to_le(relinfo, relnum, rela, view, view_size);
+	  break;
+	}
+      else if (optimized_type == tls::TLSOPT_NONE)
+	{
+	  break;
+	}
+      gold_error_at_location(relinfo, relnum, rela.get_r_offset(),
+			     _("unsupported reloc %u"), r_type);
+      break;
+
+    case elfcpp::R_390_TLS_LDM32:            // Local-dynamic module
+    case elfcpp::R_390_TLS_LDM64:
+      if (optimized_type == tls::TLSOPT_TO_LE)
+	{
+	  if (tls_segment == NULL)
+	    {
+	      gold_assert(parameters->errors()->error_count() > 0
+			  || issue_undefined_symbol_error(gsym));
+	      return 0;
+	    }
+	  // Doesn't matter what we fill it with - it's going to be unused.
+	  return 0;
+	}
+      else if (optimized_type == tls::TLSOPT_NONE)
+	{
+	  // Relocate the field with the offset of the GOT entry for
+	  // the module index.
+	  return (target->got_mod_index_entry(NULL, NULL, NULL)
+		  + addend
+		  + target->got_main_offset());
+	}
+      gold_error_at_location(relinfo, relnum, rela.get_r_offset(),
+			     _("unsupported reloc %u"), r_type);
+      break;
+
+    case elfcpp::R_390_TLS_LDO32:         // Local-dynamic offset
+    case elfcpp::R_390_TLS_LDO64:
+      // This relocation type is used in debugging information.
+      // In that case we need to not optimize the value.  If the
+      // section is not allocatable, then we assume we should not
+      // optimize this reloc.
+      if (optimized_type == tls::TLSOPT_TO_LE && is_allocatable)
+	{
+	  if (tls_segment == NULL)
+	    {
+	      gold_assert(parameters->errors()->error_count() > 0
+			  || issue_undefined_symbol_error(gsym));
+	      return 0;
+	    }
+	  value -= tls_segment->memsz();
+	}
+      return value;
+
+    case elfcpp::R_390_TLS_LOAD:         // Initial-exec marker
+      // This is a marker relocation. If the sequence is being turned to LE,
+      // we modify the instruction, otherwise the instruction is untouched.
+      if (gsym != NULL
+	  && gsym->is_undefined()
+	  && parameters->options().output_is_executable())
+	{
+	  Target_s390<size>::Relocate::tls_ie_to_le(relinfo, relnum,
+						      rela, view,
+						      view_size);
+	  break;
+	}
+      else if (optimized_type == tls::TLSOPT_TO_LE)
+	{
+	  if (tls_segment == NULL)
+	    {
+	      gold_assert(parameters->errors()->error_count() > 0
+			  || issue_undefined_symbol_error(gsym));
+	      return 0;
+	    }
+	  Target_s390<size>::Relocate::tls_ie_to_le(relinfo, relnum,
+						      rela, view,
+						      view_size);
+	  break;
+	}
+      else if (optimized_type == tls::TLSOPT_NONE)
+	{
+	  break;
+	}
+      gold_error_at_location(relinfo, relnum, rela.get_r_offset(),
+			     _("unsupported reloc type %u"),
+			     r_type);
+      break;
+
+    case elfcpp::R_390_TLS_GOTIE12:       // Initial-exec, not optimizable
+    case elfcpp::R_390_TLS_GOTIE20:
+    case elfcpp::R_390_TLS_IEENT:
+    case elfcpp::R_390_TLS_GOTIE32:       // Initial-exec, optimizable
+    case elfcpp::R_390_TLS_GOTIE64:
+    case elfcpp::R_390_TLS_IE32:
+    case elfcpp::R_390_TLS_IE64:
+      if (gsym != NULL
+	  && gsym->is_undefined()
+	  && parameters->options().output_is_executable()
+	  // These three cannot be optimized to LE, no matter what
+	  && r_type != elfcpp::R_390_TLS_GOTIE12
+	  && r_type != elfcpp::R_390_TLS_GOTIE20
+	  && r_type != elfcpp::R_390_TLS_IEENT)
+	{
+          return value;
+	}
+      else if (optimized_type == tls::TLSOPT_TO_LE)
+	{
+	  if (tls_segment == NULL)
+	    {
+	      gold_assert(parameters->errors()->error_count() > 0
+			  || issue_undefined_symbol_error(gsym));
+	      return 0;
+	    }
+          return value - tls_segment->memsz();
+	}
+      else if (optimized_type == tls::TLSOPT_NONE)
+	{
+	  // Relocate the field with the offset of the GOT entry for
+	  // the tp-relative offset of the symbol.
+	  unsigned int got_offset;
+	  if (gsym != NULL)
+	    {
+	      gold_assert(gsym->has_got_offset(GOT_TYPE_TLS_OFFSET));
+	      got_offset = gsym->got_offset(GOT_TYPE_TLS_OFFSET);
+	    }
+	  else
+	    {
+	      unsigned int r_sym = elfcpp::elf_r_sym<size>(rela.get_r_info());
+	      gold_assert(object->local_has_got_offset(r_sym,
+						       GOT_TYPE_TLS_OFFSET));
+	      got_offset = object->local_got_offset(r_sym, GOT_TYPE_TLS_OFFSET);
+	    }
+	  got_offset += target->got_main_offset();
+	  if (r_type == elfcpp::R_390_TLS_IE32
+	      || r_type == elfcpp::R_390_TLS_IE64)
+	    return target->got_address() + got_offset + addend;
+	  else
+	    return got_offset + addend;
+	}
+      gold_error_at_location(relinfo, relnum, rela.get_r_offset(),
+			     _("unsupported reloc type %u"),
+			     r_type);
+      break;
+
+    case elfcpp::R_390_TLS_LE32:          // Local-exec
+    case elfcpp::R_390_TLS_LE64:
+      if (tls_segment == NULL)
+	{
+	  gold_assert(parameters->errors()->error_count() > 0
+		      || issue_undefined_symbol_error(gsym));
+	  return 0;
+	}
+      return value - tls_segment->memsz();
+    }
+  return 0;
+}
+
+// Do a relocation in which we convert a TLS General-Dynamic to an
+// Initial-Exec.
+
+template<int size>
+inline void
+Target_s390<size>::Relocate::tls_gd_to_ie(
+    const Relocate_info<size, true>* relinfo,
+    size_t relnum,
+    const elfcpp::Rela<size, true>& rela,
+    unsigned char* view,
+    section_size_type view_size)
+{
+  tls::check_range(relinfo, relnum, rela.get_r_offset(), view_size, 4);
+  if (view[0] == 0x4d)
+    {
+      // bas, don't care about details
+      // Change to l %r2, 0(%r2, %r12)
+      view[0] = 0x58;
+      view[1] = 0x22;
+      view[2] = 0xc0;
+      view[3] = 0x00;
+      return;
+    }
+  else if (view[0] == 0xc0)
+    {
+      tls::check_range(relinfo, relnum, rela.get_r_offset(), view_size, 6);
+      // brasl %r14, __tls_get_offset@plt
+      if (view[1] == 0xe5)
+	{
+	  // Change to l/lg %r2, 0(%r2, %r12)
+	  // There was a PLT32DBL reloc at the last 4 bytes, overwrite its result.
+	  if (size == 32)
+	    {
+	      // l
+	      view[0] = 0x58;
+	      view[1] = 0x22;
+	      view[2] = 0xc0;
+	      view[3] = 0x00;
+	      // nop
+	      view[4] = 0x07;
+	      view[5] = 0x07;
+	    }
+	  else
+	    {
+	      // lg
+	      view[0] = 0xe3;
+	      view[1] = 0x22;
+	      view[2] = 0xc0;
+	      view[3] = 0;
+	      view[4] = 0;
+	      view[5] = 0x04;
+	    }
+	  return;
+	}
+    }
+  gold_error_at_location(relinfo, relnum, rela.get_r_offset(),
+			 _("unsupported op for GD to IE"));
+}
+
+// Do a relocation in which we convert a TLS General-Dynamic to a
+// Local-Exec.
+
+template<int size>
+inline void
+Target_s390<size>::Relocate::tls_gd_to_le(
+    const Relocate_info<size, true>* relinfo,
+    size_t relnum,
+    const elfcpp::Rela<size, true>& rela,
+    unsigned char* view,
+    section_size_type view_size)
+{
+  tls::check_range(relinfo, relnum, rela.get_r_offset(), view_size, 2);
+  if (view[0] == 0x0d)
+    {
+      // basr, change to nop
+      view[0] = 0x07;
+      view[1] = 0x07;
+    }
+  else if (view[0] == 0x4d)
+    {
+      tls::check_range(relinfo, relnum, rela.get_r_offset(), view_size, 4);
+      // bas, don't care about details, change to nop
+      view[0] = 0x47;
+      view[1] = 0;
+      view[2] = 0;
+      view[3] = 0;
+      return;
+    }
+  else if (view[0] == 0xc0)
+    {
+      tls::check_range(relinfo, relnum, rela.get_r_offset(), view_size, 6);
+      // brasl %r14, __tls_get_offset@plt
+      if (view[1] == 0xe5)
+	{
+	  // Change to nop jump. There was a PLT32DBL reloc at the last
+	  // 4 bytes, overwrite its result.
+	  view[1] = 0x04;
+	  view[2] = 0;
+	  view[3] = 0;
+	  view[4] = 0;
+	  view[5] = 0;
+	  return;
+	}
+    }
+  gold_error_at_location(relinfo, relnum, rela.get_r_offset(),
+			 _("unsupported op for GD to LE"));
+}
+
+template<int size>
+inline void
+Target_s390<size>::Relocate::tls_ld_to_le(
+    const Relocate_info<size, true>* relinfo,
+    size_t relnum,
+    const elfcpp::Rela<size, true>& rela,
+    unsigned char* view,
+    section_size_type view_size)
+{
+  tls::check_range(relinfo, relnum, rela.get_r_offset(), view_size, 4);
+
+  if (view[0] == 0x0d)
+    {
+      // basr, change to nop
+      view[0] = 0x07;
+      view[1] = 0x07;
+    }
+  else if (view[0] == 0x4d)
+    {
+      // bas, don't care about details, change to nop
+      view[0] = 0x47;
+      view[1] = 0;
+      view[2] = 0;
+      view[3] = 0;
+      return;
+    }
+  else if (view[0] == 0xc0)
+    {
+      tls::check_range(relinfo, relnum, rela.get_r_offset(), view_size, 6);
+      // brasl %r14, __tls_get_offset@plt
+      if (view[1] == 0xe5)
+	{
+	  // Change to nop jump. There was a PLT32DBL reloc at the last
+	  // 4 bytes, overwrite its result.
+	  view[1] = 0x04;
+	  view[2] = 0;
+	  view[3] = 0;
+	  view[4] = 0;
+	  view[5] = 0;
+	  return;
+	}
+    }
+  gold_error_at_location(relinfo, relnum, rela.get_r_offset(),
+			 _("unsupported op for LD to LE"));
+}
+
+// Do a relocation in which we convert a TLS Initial-Exec to a
+// Local-Exec.
+
+template<int size>
+inline void
+Target_s390<size>::Relocate::tls_ie_to_le(
+    const Relocate_info<size, true>* relinfo,
+    size_t relnum,
+    const elfcpp::Rela<size, true>& rela,
+    unsigned char* view,
+    section_size_type view_size)
+{
+  tls::check_range(relinfo, relnum, rela.get_r_offset(), view_size, 4);
+
+  if (view[0] == 0x58)
+    {
+      // l %rX, 0(%rY) or l %rX, 0(%rY, %r12)
+      if ((view[2] & 0x0f) != 0 || view[3] != 0)
+	goto err;
+      int rx = view[1] >> 4 & 0xf;
+      int ry = view[1] & 0xf;
+      int rz = view[2] >> 4 & 0xf;
+      if (rz == 0)
+	{
+	}
+      else if (ry == 0)
+	{
+	  ry = rz;
+	}
+      else if (rz == 12)
+	{
+	}
+      else if (ry == 12)
+	{
+	  ry = rz;
+	}
+      else
+	goto err;
+      // to lr %rX, $rY
+      view[0] = 0x18;
+      view[1] = rx << 4 | ry;
+      // and insert a nop
+      view[2] = 0x07;
+      view[3] = 0x00;
+    }
+  else if (view[0] == 0xe3)
+    {
+      tls::check_range(relinfo, relnum, rela.get_r_offset(), view_size, 6);
+      // lg %rX, 0(%rY) or lg %rX, 0(%rY, %r12)
+      if ((view[2] & 0x0f) != 0 ||
+	  view[3] != 0 ||
+	  view[4] != 0 ||
+	  view[5] != 0x04)
+	goto err;
+      int rx = view[1] >> 4 & 0xf;
+      int ry = view[1] & 0xf;
+      int rz = view[2] >> 4 & 0xf;
+      if (rz == 0)
+	{
+	}
+      else if (ry == 0)
+	{
+	  ry = rz;
+	}
+      else if (rz == 12)
+	{
+	}
+      else if (ry == 12)
+	{
+	  ry = rz;
+	}
+      else
+	goto err;
+      // to sllg %rX, $rY, 0
+      view[0] = 0xeb;
+      view[1] = rx << 4 | ry;
+      view[2] = 0x00;
+      view[3] = 0x00;
+      view[4] = 0x00;
+      view[5] = 0x0d;
+    }
+  else
+    {
+err:
+      gold_error_at_location(relinfo, relnum, rela.get_r_offset(),
+			     _("unsupported op for IE to LE"));
+    }
+}
+
+// Scan relocations for a section.
+
+template<int size>
+void
+Target_s390<size>::scan_relocs(Symbol_table* symtab,
+				 Layout* layout,
+				 Sized_relobj_file<size, true>* object,
+				 unsigned int data_shndx,
+				 unsigned int sh_type,
+				 const unsigned char* prelocs,
+				 size_t reloc_count,
+				 Output_section* output_section,
+				 bool needs_special_offset_handling,
+				 size_t local_symbol_count,
+				 const unsigned char* plocal_symbols)
+{
+  if (sh_type == elfcpp::SHT_REL)
+    {
+      gold_error(_("%s: unsupported REL reloc section"),
+		 object->name().c_str());
+      return;
+    }
+
+  gold::scan_relocs<size, true, Target_s390<size>, elfcpp::SHT_RELA,
+      typename Target_s390<size>::Scan>(
+    symtab,
+    layout,
+    this,
+    object,
+    data_shndx,
+    prelocs,
+    reloc_count,
+    output_section,
+    needs_special_offset_handling,
+    local_symbol_count,
+    plocal_symbols);
+}
+
+// Finalize the sections.
+
+template<int size>
+void
+Target_s390<size>::do_finalize_sections(
+    Layout* layout,
+    const Input_objects*,
+    Symbol_table* symtab)
+{
+  const Reloc_section* rel_plt = (this->plt_ == NULL
+				  ? NULL
+				  : this->plt_->rela_plt());
+  layout->add_target_dynamic_tags(false, this->got_plt_, rel_plt,
+				  this->rela_dyn_, true, size == 32);
+
+  this->layout_ = layout;
+
+  // Emit any relocs we saved in an attempt to avoid generating COPY
+  // relocs.
+  if (this->copy_relocs_.any_saved_relocs())
+    this->copy_relocs_.emit(this->rela_dyn_section(layout));
+
+  // Set the size of the _GLOBAL_OFFSET_TABLE_ symbol to the size of
+  // the .got section.
+  Symbol* sym = this->global_offset_table_;
+  if (sym != NULL)
+    {
+      uint64_t data_size = this->got_->current_data_size();
+      symtab->get_sized_symbol<size>(sym)->set_symsize(data_size);
+    }
+
+  if (parameters->doing_static_link()
+      && (this->plt_ == NULL || !this->plt_->has_irelative_section()))
+    {
+      // If linking statically, make sure that the __rela_iplt symbols
+      // were defined if necessary, even if we didn't create a PLT.
+      static const Define_symbol_in_segment syms[] =
+	{
+	  {
+	    "__rela_iplt_start",	// name
+	    elfcpp::PT_LOAD,		// segment_type
+	    elfcpp::PF_W,		// segment_flags_set
+	    elfcpp::PF(0),		// segment_flags_clear
+	    0,				// value
+	    0,				// size
+	    elfcpp::STT_NOTYPE,		// type
+	    elfcpp::STB_GLOBAL,		// binding
+	    elfcpp::STV_HIDDEN,		// visibility
+	    0,				// nonvis
+	    Symbol::SEGMENT_START,	// offset_from_base
+	    true			// only_if_ref
+	  },
+	  {
+	    "__rela_iplt_end",		// name
+	    elfcpp::PT_LOAD,		// segment_type
+	    elfcpp::PF_W,		// segment_flags_set
+	    elfcpp::PF(0),		// segment_flags_clear
+	    0,				// value
+	    0,				// size
+	    elfcpp::STT_NOTYPE,		// type
+	    elfcpp::STB_GLOBAL,		// binding
+	    elfcpp::STV_HIDDEN,		// visibility
+	    0,				// nonvis
+	    Symbol::SEGMENT_START,	// offset_from_base
+	    true			// only_if_ref
+	  }
+	};
+
+      symtab->define_symbols(layout, 2, syms,
+			     layout->script_options()->saw_sections_clause());
+    }
+}
+
+// Return the size of a relocation while scanning during a relocatable
+// link.
+
+template<int size>
+unsigned int
+Target_s390<size>::Relocatable_size_for_reloc::get_size_for_reloc(
+    unsigned int r_type,
+    Relobj* object)
+{
+  switch (r_type)
+    {
+    case elfcpp::R_390_NONE:
+    case elfcpp::R_390_GNU_VTINHERIT:
+    case elfcpp::R_390_GNU_VTENTRY:
+    case elfcpp::R_390_TLS_GD32:          // Global-dynamic
+    case elfcpp::R_390_TLS_GD64:
+    case elfcpp::R_390_TLS_GDCALL:
+    case elfcpp::R_390_TLS_LDM32:         // Local-dynamic
+    case elfcpp::R_390_TLS_LDM64:
+    case elfcpp::R_390_TLS_LDO32:
+    case elfcpp::R_390_TLS_LDO64:
+    case elfcpp::R_390_TLS_LDCALL:
+    case elfcpp::R_390_TLS_IE32:          // Initial-exec
+    case elfcpp::R_390_TLS_IE64:
+    case elfcpp::R_390_TLS_IEENT:
+    case elfcpp::R_390_TLS_GOTIE12:
+    case elfcpp::R_390_TLS_GOTIE20:
+    case elfcpp::R_390_TLS_GOTIE32:
+    case elfcpp::R_390_TLS_GOTIE64:
+    case elfcpp::R_390_TLS_LOAD:
+    case elfcpp::R_390_TLS_LE32:          // Local-exec
+    case elfcpp::R_390_TLS_LE64:
+      return 0;
+
+    case elfcpp::R_390_64:
+    case elfcpp::R_390_PC64:
+    case elfcpp::R_390_GOT64:
+    case elfcpp::R_390_PLT64:
+    case elfcpp::R_390_GOTOFF64:
+    case elfcpp::R_390_GOTPLT64:
+    case elfcpp::R_390_PLTOFF64:
+      return 8;
+
+    case elfcpp::R_390_32:
+    case elfcpp::R_390_PC32:
+    case elfcpp::R_390_GOT32:
+    case elfcpp::R_390_PLT32:
+    case elfcpp::R_390_GOTOFF32:
+    case elfcpp::R_390_GOTPC:
+    case elfcpp::R_390_PC32DBL:
+    case elfcpp::R_390_PLT32DBL:
+    case elfcpp::R_390_GOTPCDBL:
+    case elfcpp::R_390_GOTENT:
+    case elfcpp::R_390_GOTPLT32:
+    case elfcpp::R_390_GOTPLTENT:
+    case elfcpp::R_390_PLTOFF32:
+    case elfcpp::R_390_20:
+    case elfcpp::R_390_GOT20:
+    case elfcpp::R_390_GOTPLT20:
+      return 4;
+
+    case elfcpp::R_390_PC24DBL:
+    case elfcpp::R_390_PLT24DBL:
+      return 3;
+
+    case elfcpp::R_390_12:
+    case elfcpp::R_390_GOT12:
+    case elfcpp::R_390_GOTPLT12:
+    case elfcpp::R_390_PC12DBL:
+    case elfcpp::R_390_PLT12DBL:
+    case elfcpp::R_390_16:
+    case elfcpp::R_390_GOT16:
+    case elfcpp::R_390_PC16:
+    case elfcpp::R_390_PC16DBL:
+    case elfcpp::R_390_PLT16DBL:
+    case elfcpp::R_390_GOTOFF16:
+    case elfcpp::R_390_GOTPLT16:
+    case elfcpp::R_390_PLTOFF16:
+      return 2;
+
+    case elfcpp::R_390_8:
+      return 1;
+
+      // These are relocations which should only be seen by the
+      // dynamic linker, and should never be seen here.
+    case elfcpp::R_390_COPY:
+    case elfcpp::R_390_GLOB_DAT:
+    case elfcpp::R_390_JMP_SLOT:
+    case elfcpp::R_390_RELATIVE:
+    case elfcpp::R_390_IRELATIVE:
+    case elfcpp::R_390_TLS_DTPMOD:
+    case elfcpp::R_390_TLS_DTPOFF:
+    case elfcpp::R_390_TLS_TPOFF:
+      object->error(_("unexpected reloc %u in object file"), r_type);
+      return 0;
+
+    default:
+      object->error(_("unsupported reloc %u in object file"), r_type);
+      return 0;
+    }
+}
+
+// Scan the relocs during a relocatable link.
+
+template<int size>
+void
+Target_s390<size>::scan_relocatable_relocs(
+    Symbol_table* symtab,
+    Layout* layout,
+    Sized_relobj_file<size, true>* object,
+    unsigned int data_shndx,
+    unsigned int sh_type,
+    const unsigned char* prelocs,
+    size_t reloc_count,
+    Output_section* output_section,
+    bool needs_special_offset_handling,
+    size_t local_symbol_count,
+    const unsigned char* plocal_symbols,
+    Relocatable_relocs* rr)
+{
+  gold_assert(sh_type == elfcpp::SHT_RELA);
+
+  typedef gold::Default_scan_relocatable_relocs<elfcpp::SHT_RELA,
+    Relocatable_size_for_reloc> Scan_relocatable_relocs;
+
+  gold::scan_relocatable_relocs<size, true, elfcpp::SHT_RELA,
+      Scan_relocatable_relocs>(
+    symtab,
+    layout,
+    object,
+    data_shndx,
+    prelocs,
+    reloc_count,
+    output_section,
+    needs_special_offset_handling,
+    local_symbol_count,
+    plocal_symbols,
+    rr);
+}
+
+// Relocate a section during a relocatable link.
+
+template<int size>
+void
+Target_s390<size>::relocate_relocs(
+    const Relocate_info<size, true>* relinfo,
+    unsigned int sh_type,
+    const unsigned char* prelocs,
+    size_t reloc_count,
+    Output_section* output_section,
+    typename elfcpp::Elf_types<size>::Elf_Off offset_in_output_section,
+    const Relocatable_relocs* rr,
+    unsigned char* view,
+    typename elfcpp::Elf_types<size>::Elf_Addr view_address,
+    section_size_type view_size,
+    unsigned char* reloc_view,
+    section_size_type reloc_view_size)
+{
+  gold_assert(sh_type == elfcpp::SHT_RELA);
+
+  gold::relocate_relocs<size, true, elfcpp::SHT_RELA>(
+    relinfo,
+    prelocs,
+    reloc_count,
+    output_section,
+    offset_in_output_section,
+    rr,
+    view,
+    view_address,
+    view_size,
+    reloc_view,
+    reloc_view_size);
+}
+
+// Return the offset to use for the GOT_INDX'th got entry which is
+// for a local tls symbol specified by OBJECT, SYMNDX.
+template<int size>
+int64_t
+Target_s390<size>::do_tls_offset_for_local(
+    const Relobj*,
+    unsigned int,
+    unsigned int) const
+{
+  // The only way we can get called is when IEENT/GOTIE12/GOTIE20
+  // couldn't be optimised to LE.
+  Output_segment* tls_segment = layout_->tls_segment();
+  return -tls_segment->memsz();
+}
+
+// Return the offset to use for the GOT_INDX'th got entry which is
+// for global tls symbol GSYM.
+template<int size>
+int64_t
+Target_s390<size>::do_tls_offset_for_global(
+    Symbol*,
+    unsigned int) const
+{
+  Output_segment* tls_segment = layout_->tls_segment();
+  return -tls_segment->memsz();
+}
+
+// Return the value to use for a dynamic which requires special
+// treatment.  This is how we support equality comparisons of function
+// pointers across shared library boundaries, as described in the
+// processor specific ABI supplement.
+
+template<int size>
+uint64_t
+Target_s390<size>::do_dynsym_value(const Symbol* gsym) const
+{
+  gold_assert(gsym->is_from_dynobj() && gsym->has_plt_offset());
+  return this->plt_address_for_global(gsym);
+}
+
+// Return a string used to fill a code section with nops to take up
+// the specified length.
+
+template<int size>
+std::string
+Target_s390<size>::do_code_fill(section_size_type length) const
+{
+  if (length & 1)
+    gold_warning(_("S/390 code fill of odd length requested"));
+  return std::string(length, static_cast<char>(0x07));
+}
+
+// Relocate section data.
+
+template<int size>
+void
+Target_s390<size>::relocate_section(
+    const Relocate_info<size, true>* relinfo,
+    unsigned int sh_type,
+    const unsigned char* prelocs,
+    size_t reloc_count,
+    Output_section* output_section,
+    bool needs_special_offset_handling,
+    unsigned char* view,
+    typename elfcpp::Elf_types<size>::Elf_Addr address,
+    section_size_type view_size,
+    const Reloc_symbol_changes* reloc_symbol_changes)
+{
+  gold_assert(sh_type == elfcpp::SHT_RELA);
+
+  gold::relocate_section<size, true, Target_s390<size>, elfcpp::SHT_RELA,
+			 typename Target_s390<size>::Relocate,
+			 gold::Default_comdat_behavior>(
+    relinfo,
+    this,
+    prelocs,
+    reloc_count,
+    output_section,
+    needs_special_offset_handling,
+    view,
+    address,
+    view_size,
+    reloc_symbol_changes);
+}
+
+// Apply an incremental relocation.  Incremental relocations always refer
+// to global symbols.
+
+template<int size>
+void
+Target_s390<size>::apply_relocation(
+    const Relocate_info<size, true>* relinfo,
+    typename elfcpp::Elf_types<size>::Elf_Addr r_offset,
+    unsigned int r_type,
+    typename elfcpp::Elf_types<size>::Elf_Swxword r_addend,
+    const Symbol* gsym,
+    unsigned char* view,
+    typename elfcpp::Elf_types<size>::Elf_Addr address,
+    section_size_type view_size)
+{
+  gold::apply_relocation<size, true, Target_s390<size>,
+			 typename Target_s390<size>::Relocate>(
+    relinfo,
+    this,
+    r_offset,
+    r_type,
+    r_addend,
+    gsym,
+    view,
+    address,
+    view_size);
+}
+
+// The selector for s390 object files.
+
+template<int size>
+class Target_selector_s390 : public Target_selector
+{
+public:
+  Target_selector_s390()
+    : Target_selector(elfcpp::EM_S390, size, true,
+		      (size == 64 ? "elf64-s390" : "elf32-s390"),
+		      (size == 64 ? "elf64_s390" : "elf32_s390"))
+  { }
+
+  virtual Target*
+  do_instantiate_target()
+  { return new Target_s390<size>(); }
+};
+
+Target_selector_s390<32> target_selector_s390;
+Target_selector_s390<64> target_selector_s390x;
+
+} // End anonymous namespace.