Add support for STT_SPARC_REGISTER symbols.

gold/
	PR gold/19019
	* layout.h (Layout::add_target_specific_dynamic_tag): New function.
	* layout.cc (Layout::add_target_specific_dynamic_tag): New function.
	* mips.cc (Target_mips::make_symbol): Adjust function signature.
	* sparc.cc (Target_sparc::Target_sparc): Initialize register_syms_.
	(Target_sparc::do_is_defined_by_abi): Remove test for
	STT_SPARC_REGISTER.
	(Target_sparc::Register_symbol): New struct type.
	(Target_sparc::register_syms_): New data member.
	(Target_sparc<64, true>::sparc_info): Set has_make_symbol to true.
	(Target_sparc::make_symbol): New function.
	(Target_sparc::do_finalize_sections): Add register symbols and new
	dynamic table entries.
	* symtab.h (Sized_symbol::init_undefined): Add value parameter.
	(Symbol_table::add_target_global_symbol): New function.
	(Symbol_table::target_symbols_): New data member.
	* symtab.cc (Sized_symbol::init_undefined): Add value parameter.
	(Symbol_table::Symbol_table): Initialize target_symbols_.
	(Symbol_table::add_from_object): Pass additional parameters to
	Target::make_symbol.
	(Symbol_table::define_special_symbol): Likewise.
	(Symbol_table::add_undefined_symbol_from_command_line): Pass 0 for
	undefined symbol value.
	(Symbol_table::set_dynsym_indexes): Process target-specific symbols.
	(Symbol_table::sized_finalize): Likewise.
	(Symbol_table::sized_write_globals): Likewise.
	* target.h (Sized_target::make_symbol): Add name, st_type, object,
	st_shndx, and value parameters.

1 files changed, 10 insertions, 2 deletions

diff --git a/gold/symtab.h b/gold/symtab.h
index 764ef4622a8..5cee458f1a2 100644
--- a/gold/symtab.h
+++ b/gold/symtab.h
@@ -1113,8 +1113,8 @@ class Sized_symbol : public Symbol
 
   // Initialize fields for an undefined symbol.
   void
-  init_undefined(const char* name, const char* version, elfcpp::STT,
-		 elfcpp::STB, elfcpp::STV, unsigned char nonvis);
+  init_undefined(const char* name, const char* version, Value_type value,
+		 elfcpp::STT, elfcpp::STB, elfcpp::STV, unsigned char nonvis);
 
   // Override existing symbol.
   template<bool big_endian>
@@ -1481,6 +1481,12 @@ class Symbol_table
   define_symbols(const Layout*, int count, const Define_symbol_in_segment*,
 		 bool only_if_ref);
 
+  // Add a target-specific global symbol.
+  // (Used by SPARC backend to add STT_SPARC_REGISTER symbols.)
+  void
+  add_target_global_symbol(Symbol* sym)
+  { this->target_symbols_.push_back(sym); }
+
   // Define SYM using a COPY reloc.  POSD is the Output_data where the
   // symbol should be defined--typically a .dyn.bss section.  VALUE is
   // the offset within POSD.
@@ -1951,6 +1957,8 @@ class Symbol_table
   const Version_script_info& version_script_;
   Garbage_collection* gc_;
   Icf* icf_;
+  // Target-specific symbols, if any.
+  std::vector<Symbol*> target_symbols_;
 };
 
 // We inline get_sized_symbol for efficiency.