OSDN Git Service

PR 10861
[pf3gnuchains/pf3gnuchains3x.git] / gold / object.cc
index 5ac7878..34b59b5 100644 (file)
@@ -315,8 +315,8 @@ Relobj::is_section_name_included(const char* name)
           && strstr(name, "personality")) 
       || (is_prefix_of(".data", name) 
           &&  strstr(name, "personality")) 
-      || (is_prefix_of(".gnu.linkonce.d", name) && 
-            strstr(name, "personality")))
+      || (is_prefix_of(".gnu.linkonce.d", name)
+         && strstr(name, "personality")))
     {
       return true; 
     }
@@ -359,7 +359,7 @@ Sized_relobj<size, big_endian>::~Sized_relobj()
 
 template<int size, bool big_endian>
 void
-Sized_relobj<size, big_endian>::setup()
+Sized_relobj<size, big_endian>::do_setup()
 {
   const unsigned int shnum = this->elf_file_.shnum();
   this->set_shnum(shnum);
@@ -934,16 +934,16 @@ Sized_relobj<size, big_endian>::do_layout(Symbol_table* symtab,
   const unsigned int shnum = this->shnum();
   bool is_gc_pass_one = ((parameters->options().gc_sections() 
                           && !symtab->gc()->is_worklist_ready())
-                         || (parameters->options().icf()
+                         || (parameters->options().icf_enabled()
                              && !symtab->icf()->is_icf_ready()));
  
   bool is_gc_pass_two = ((parameters->options().gc_sections() 
                           && symtab->gc()->is_worklist_ready())
-                         || (parameters->options().icf()
+                         || (parameters->options().icf_enabled()
                              && symtab->icf()->is_icf_ready()));
 
   bool is_gc_or_icf = (parameters->options().gc_sections()
-                       || parameters->options().icf()); 
+                       || parameters->options().icf_enabled()); 
 
   // Both is_gc_pass_one and is_gc_pass_two should not be true.
   gold_assert(!(is_gc_pass_one  && is_gc_pass_two));
@@ -1138,6 +1138,12 @@ Sized_relobj<size, big_endian>::do_layout(Symbol_table* symtab,
                omit[i] = true;
            }
 
+         // Skip attributes section.
+         if (parameters->target().is_attributes_section(name))
+           {
+             omit[i] = true;
+           }
+
           bool discard = omit[i];
           if (!discard)
             {
@@ -1238,7 +1244,7 @@ Sized_relobj<size, big_endian>::do_layout(Symbol_table* symtab,
               }
         }
 
-      if (is_gc_pass_two && parameters->options().icf())
+      if (is_gc_pass_two && parameters->options().icf_enabled())
         {
           if (out_sections[i] == NULL)
             {
@@ -1521,6 +1527,7 @@ Sized_relobj<size, big_endian>::do_count_local_symbols(Stringpool* pool,
   unsigned int dyncount = 0;
   // Skip the first, dummy, symbol.
   psyms += sym_size;
+  bool discard_all = parameters->options().discard_all();
   bool discard_locals = parameters->options().discard_locals();
   for (unsigned int i = 1; i < loccount; ++i, psyms += sym_size)
     {
@@ -1544,7 +1551,7 @@ Sized_relobj<size, big_endian>::do_count_local_symbols(Stringpool* pool,
       // Decide whether this symbol should go into the output file.
 
       if ((shndx < shnum && out_sections[shndx] == NULL)
-         || (shndx == this->discarded_eh_frame_shndx_))
+         || shndx == this->discarded_eh_frame_shndx_)
         {
          lv.set_no_output_symtab_entry();
           gold_assert(!lv.needs_output_dynsym_entry());
@@ -1567,6 +1574,21 @@ Sized_relobj<size, big_endian>::do_count_local_symbols(Stringpool* pool,
          continue;
        }
 
+      const char* name = pnames + sym.get_st_name();
+
+      // If needed, add the symbol to the dynamic symbol table string pool.
+      if (lv.needs_output_dynsym_entry())
+        {
+          dynpool->add(name, true, NULL);
+          ++dyncount;
+        }
+
+      if (discard_all)
+       {
+         lv.set_no_output_symtab_entry();
+         continue;
+       }
+
       // If --discard-locals option is used, discard all temporary local
       // symbols.  These symbols start with system-specific local label
       // prefixes, typically .L for ELF system.  We want to be compatible
@@ -1579,7 +1601,6 @@ Sized_relobj<size, big_endian>::do_count_local_symbols(Stringpool* pool,
       //   - the symbol has a name.
       //
       // We do not discard a symbol if it needs a dynamic symbol entry.
-      const char* name = pnames + sym.get_st_name();
       if (discard_locals
          && sym.get_st_type() != elfcpp::STT_FILE
          && !lv.needs_output_dynsym_entry()
@@ -1600,13 +1621,6 @@ Sized_relobj<size, big_endian>::do_count_local_symbols(Stringpool* pool,
       // Add the symbol to the symbol table string pool.
       pool->add(name, true, NULL);
       ++count;
-
-      // If needed, add the symbol to the dynamic symbol table string pool.
-      if (lv.needs_output_dynsym_entry())
-        {
-          dynpool->add(name, true, NULL);
-          ++dyncount;
-        }
     }
 
   this->output_local_symbol_count_ = count;
@@ -1677,7 +1691,15 @@ Sized_relobj<size, big_endian>::do_finalize_local_symbols(unsigned int index,
               os = folded_obj->output_section(folded.second);
               gold_assert(os != NULL);
               secoffset = folded_obj->get_output_section_offset(folded.second);
-              gold_assert(secoffset != invalid_address);
+
+             // This could be a relaxed input section.
+              if (secoffset == invalid_address)
+               {
+                 const Output_relaxed_input_section* relaxed_section =
+                   os->find_relaxed_input_section(folded_obj, folded.second);
+                 gold_assert(relaxed_section != NULL);
+                 secoffset = relaxed_section->address() - os->address();
+               }
             }
 
          if (os == NULL)
@@ -1711,12 +1733,18 @@ Sized_relobj<size, big_endian>::do_finalize_local_symbols(unsigned int index,
                }
              else if (!os->find_starting_output_address(this, shndx, &start))
                {
-                 // This is a section symbol, but apparently not one
-                 // in a merged section.  Just use the start of the
-                 // output section.  This happens with relocatable
-                 // links when the input object has section symbols
-                 // for arbitrary non-merge sections.
-                 lv.set_output_value(os->address());
+                 // This is a section symbol, but apparently not one in a
+                 // merged section.  First check to see if this is a relaxed
+                 // input section.  If so, use its address.  Otherwise just
+                 // use the start of the output section.  This happens with
+                 // relocatable links when the input object has section
+                 // symbols for arbitrary non-merge sections.
+                 const Output_section_data* posd =
+                   os->find_relaxed_input_section(this, shndx);
+                 if (posd != NULL)
+                   lv.set_output_value(posd->address());
+                 else
+                   lv.set_output_value(os->address());
                }
              else
                {
@@ -2281,7 +2309,7 @@ is_elf_object(Input_file* input_file, off_t offset,
              const unsigned char** start, int *read_size)
 {
   off_t filesize = input_file->file().filesize();
-  int want = elfcpp::Elf_sizes<64>::ehdr_size;
+  int want = elfcpp::Elf_recognizer::max_header_size;
   if (filesize - offset < want)
     want = filesize - offset;
 
@@ -2290,15 +2318,7 @@ is_elf_object(Input_file* input_file, off_t offset,
   *start = p;
   *read_size = want;
 
-  if (want < 4)
-    return false;
-
-  static unsigned char elfmagic[4] =
-    {
-      elfcpp::ELFMAG0, elfcpp::ELFMAG1,
-      elfcpp::ELFMAG2, elfcpp::ELFMAG3
-    };
-  return memcmp(p, elfmagic, 4) == 0;
+  return elfcpp::Elf_recognizer::is_elf_file(p, want);
 }
 
 // Read an ELF file and return the appropriate instance of Object.
@@ -2311,57 +2331,18 @@ make_elf_object(const std::string& name, Input_file* input_file, off_t offset,
   if (punconfigured != NULL)
     *punconfigured = false;
 
-  if (bytes < elfcpp::EI_NIDENT)
-    {
-      gold_error(_("%s: ELF file too short"), name.c_str());
-      return NULL;
-    }
-
-  int v = p[elfcpp::EI_VERSION];
-  if (v != elfcpp::EV_CURRENT)
-    {
-      if (v == elfcpp::EV_NONE)
-       gold_error(_("%s: invalid ELF version 0"), name.c_str());
-      else
-       gold_error(_("%s: unsupported ELF version %d"), name.c_str(), v);
-      return NULL;
-    }
-
-  int c = p[elfcpp::EI_CLASS];
-  if (c == elfcpp::ELFCLASSNONE)
-    {
-      gold_error(_("%s: invalid ELF class 0"), name.c_str());
-      return NULL;
-    }
-  else if (c != elfcpp::ELFCLASS32
-          && c != elfcpp::ELFCLASS64)
-    {
-      gold_error(_("%s: unsupported ELF class %d"), name.c_str(), c);
-      return NULL;
-    }
-
-  int d = p[elfcpp::EI_DATA];
-  if (d == elfcpp::ELFDATANONE)
-    {
-      gold_error(_("%s: invalid ELF data encoding"), name.c_str());
-      return NULL;
-    }
-  else if (d != elfcpp::ELFDATA2LSB
-          && d != elfcpp::ELFDATA2MSB)
+  std::string error;
+  bool big_endian = false;
+  int size = 0;
+  if (!elfcpp::Elf_recognizer::is_valid_header(p, bytes, &size,
+                                               &big_endian, &error))
     {
-      gold_error(_("%s: unsupported ELF data encoding %d"), name.c_str(), d);
+      gold_error(_("%s: %s"), name.c_str(), error.c_str());
       return NULL;
     }
 
-  bool big_endian = d == elfcpp::ELFDATA2MSB;
-
-  if (c == elfcpp::ELFCLASS32)
+  if (size == 32)
     {
-      if (bytes < elfcpp::Elf_sizes<32>::ehdr_size)
-       {
-         gold_error(_("%s: ELF file too short"), name.c_str());
-         return NULL;
-       }
       if (big_endian)
        {
 #ifdef HAVE_TARGET_32_BIG
@@ -2395,13 +2376,8 @@ make_elf_object(const std::string& name, Input_file* input_file, off_t offset,
 #endif
        }
     }
-  else
+  else if (size == 64)
     {
-      if (bytes < elfcpp::Elf_sizes<64>::ehdr_size)
-       {
-         gold_error(_("%s: ELF file too short"), name.c_str());
-         return NULL;
-       }
       if (big_endian)
        {
 #ifdef HAVE_TARGET_64_BIG
@@ -2435,6 +2411,8 @@ make_elf_object(const std::string& name, Input_file* input_file, off_t offset,
 #endif
        }
     }
+  else
+    gold_unreachable();
 }
 
 // Instantiate the templates we need.