X-Git-Url: http://drtracing.org/?a=blobdiff_plain;f=gold%2Fsymtab.h;h=1a1f1c78633b76d05224f5d6ec6878b931a8d8a7;hb=55c144e691ec05a7b8231b5c58dc6d6659a1c4eb;hp=040be95431238b3a533b9bae8b95a842738db647;hpb=dc3714f31f5b15f9c078dcf7ddaa705dacd313c0;p=deliverable%2Fbinutils-gdb.git

diff --git a/gold/symtab.h b/gold/symtab.h
index 040be95431..1a1f1c7863 100644
--- a/gold/symtab.h
+++ b/gold/symtab.h
@@ -1,6 +1,6 @@
 // symtab.h -- the gold symbol table   -*- C++ -*-
 
-// Copyright 2006, 2007, 2008, 2009, 2010, 2011 Free Software Foundation, Inc.
+// Copyright (C) 2006-2015 Free Software Foundation, Inc.
 // Written by Ian Lance Taylor <iant@google.com>.
 
 // This file is part of gold.
@@ -121,6 +121,10 @@ class Symbol
   version() const
   { return this->version_; }
 
+  void
+  clear_version()
+  { this->version_ = NULL; }
+
   // Return whether this version is the default for this symbol name
   // (eg, "foo@@V2" is a default version; "foo@V1" is not).  Only
   // meaningful for versioned symbols.
@@ -136,6 +140,11 @@ class Symbol
   set_is_default()
   { this->is_def_ = true; }
 
+  // Set that this version is not the default for this symbol name.
+  void
+  set_is_not_default()
+  { this->is_def_ = false; }
+
   // Return the symbol's name as name@version (or name@@version).
   std::string
   versioned_name() const;
@@ -211,6 +220,11 @@ class Symbol
   type() const
   { return this->type_; }
 
+  // Set the symbol type.
+  void
+  set_type(elfcpp::STT type)
+  { this->type_ = type; }
+
   // Return true for function symbol.
   bool
   is_func() const
@@ -234,7 +248,7 @@ class Symbol
   override_visibility(elfcpp::STV);
 
   // Set whether the symbol was originally a weak undef or a regular undef
-  // when resolved by a dynamic def.
+  // when resolved by a dynamic def or by a special symbol.
   inline void
   set_undef_binding(elfcpp::STB bind)
   {
@@ -245,7 +259,8 @@ class Symbol
       }
   }
 
-  // Return TRUE if a weak undef was resolved by a dynamic def.
+  // Return TRUE if a weak undef was resolved by a dynamic def or
+  // by a special symbol.
   inline bool
   is_undef_binding_weak() const
   { return this->undef_binding_weak_; }
@@ -255,6 +270,11 @@ class Symbol
   nonvis() const
   { return this->nonvis_; }
 
+  // Set the non-visibility part of the st_other field.
+  void
+  set_nonvis(unsigned int nonvis)
+  { this->nonvis_ = nonvis; }
+
   // Return whether this symbol is a forwarder.  This will never be
   // true of a symbol found in the hash table, but may be true of
   // symbol pointers attached to object files.
@@ -508,7 +528,22 @@ class Symbol
   // Return whether this is a weak undefined symbol.
   bool
   is_weak_undefined() const
-  { return this->is_undefined() && this->binding() == elfcpp::STB_WEAK; }
+  {
+    return (this->is_undefined()
+	    && (this->binding() == elfcpp::STB_WEAK
+		|| this->is_undef_binding_weak()
+		|| parameters->options().weak_unresolved_symbols()));
+  }
+
+  // Return whether this is a strong undefined symbol.
+  bool
+  is_strong_undefined() const
+  {
+    return (this->is_undefined()
+	    && this->binding() != elfcpp::STB_WEAK
+	    && !this->is_undef_binding_weak()
+	    && !parameters->options().weak_unresolved_symbols());
+  }
 
   // Return whether this is an absolute symbol.
   bool
@@ -527,8 +562,6 @@ class Symbol
   {
     if (this->source_ != FROM_OBJECT)
       return false;
-    if (this->type_ == elfcpp::STT_COMMON)
-      return true;
     bool is_ordinary;
     unsigned int shndx = this->shndx(&is_ordinary);
     return !is_ordinary && Symbol::is_common_shndx(shndx);
@@ -572,7 +605,11 @@ class Symbol
     if (!parameters->options().shared())
       return false;
 
-    // If the user used -Bsymbolic, then nothing is preemptible.
+    // If the symbol was named in a --dynamic-list script, it is preemptible.
+    if (parameters->options().in_dynamic_list(this->name()))
+      return true;
+
+    // If the user used -Bsymbolic, then nothing (else) is preemptible.
     if (parameters->options().Bsymbolic())
       return false;
 
@@ -634,7 +671,10 @@ class Symbol
     // A TLS-related reference.
     TLS_REF = 4,
     // A reference that can always be treated as a function call.
-    FUNCTION_CALL = 8
+    FUNCTION_CALL = 8,
+    // When set, says that dynamic relocations are needed even if a
+    // symbol has a plt entry.
+    FUNC_DESC_ABI = 16,
   };
 
   // Given a direct absolute or pc-relative static relocation against
@@ -671,7 +711,8 @@ class Symbol
 
     // A reference to any PLT entry in a non-position-independent executable
     // does not need a dynamic relocation.
-    if (!parameters->options().output_is_position_independent()
+    if (!(flags & FUNC_DESC_ABI)
+	&& !parameters->options().output_is_position_independent()
         && this->has_plt_offset())
       return false;
 
@@ -763,6 +804,18 @@ class Symbol
   void
   set_output_section(Output_section*);
 
+  // Set the symbol's output segment.  This is used for pre-defined
+  // symbols whose segments aren't known until after layout is done
+  // (e.g., __ehdr_start).
+  void
+  set_output_segment(Output_segment*, Segment_offset_base);
+
+  // Set the symbol to undefined.  This is used for pre-defined
+  // symbols whose segments aren't known until after layout is done
+  // (e.g., __ehdr_start).
+  void
+  set_undefined();
+
   // Return whether there should be a warning for references to this
   // symbol.
   bool
@@ -802,8 +855,7 @@ class Symbol
   bool
   may_need_copy_reloc() const
   {
-    return (!parameters->options().output_is_position_independent()
-	    && parameters->options().copyreloc()
+    return (parameters->options().copyreloc()
 	    && this->is_from_dynobj()
 	    && !this->is_func());
   }
@@ -813,6 +865,11 @@ class Symbol
   is_predefined() const
   { return this->is_predefined_; }
 
+  // Return true if this is a C++ vtable symbol.
+  bool
+  is_cxx_vtable() const
+  { return is_prefix_of("_ZTV", this->name_); }
+
  protected:
   // Instances of this class should always be created at a specific
   // size.
@@ -1006,7 +1063,7 @@ class Symbol
   // True if UNDEF_BINDING_WEAK_ has been set (bit 32).
   bool undef_binding_set_ : 1;
   // True if this symbol was a weak undef resolved by a dynamic def
-  // (bit 33).
+  // or by a special symbol (bit 33).
   bool undef_binding_weak_ : 1;
   // True if this symbol is a predefined linker symbol (bit 34).
   bool is_predefined_ : 1;
@@ -1318,7 +1375,7 @@ class Symbol_table
  
   // Returns true if ICF determined that this is a duplicate section. 
   bool
-  is_section_folded(Object* obj, unsigned int shndx) const;
+  is_section_folded(Relobj* obj, unsigned int shndx) const;
 
   void
   set_gc(Garbage_collection* gc)
@@ -1654,7 +1711,8 @@ class Symbol_table
 	  const elfcpp::Sym<size, big_endian>& sym,
 	  unsigned int st_shndx, bool is_ordinary,
 	  unsigned int orig_st_shndx,
-	  Object*, const char* version);
+	  Object*, const char* version,
+	  bool is_default_version);
 
   template<int size, bool big_endian>
   void
@@ -1673,7 +1731,7 @@ class Symbol_table
   // resolve.cc.
   static bool
   should_override(const Symbol*, unsigned int, elfcpp::STT, Defined,
-		  Object*, bool*, bool*);
+		  Object*, bool*, bool*, bool);
 
   // Report a problem in symbol resolution.
   static void