X-Git-Url: http://git.efficios.com/?a=blobdiff_plain;f=gold%2Ftarget.cc;h=091f9d34cd5521ee08ef1e17722570deba5122b3;hb=4395ee0824136c3ab915ad5c15ba08bcccaa832c;hp=b6844d0ac32b5a2aa97b1b53840b704096fcb5bc;hpb=bb04269c747a7aa5acffa2355efd1d7343338faf;p=deliverable%2Fbinutils-gdb.git

diff --git a/gold/target.cc b/gold/target.cc
index b6844d0ac3..091f9d34cd 100644
--- a/gold/target.cc
+++ b/gold/target.cc
@@ -1,6 +1,6 @@
-// target.cc
+// target.cc -- target support for gold.
 
-// Copyright 2009 Free Software Foundation, Inc.
+// Copyright 2009, 2010, 2011 Free Software Foundation, Inc.
 // Written by Doug Kwan <dougkwan@google.com>.
 
 // This file is part of gold.
@@ -21,18 +21,22 @@
 // MA 02110-1301, USA.
 
 #include "gold.h"
+#include "elfcpp.h"
+#include "dynobj.h"
+#include "symtab.h"
+#include "output.h"
 #include "target.h"
 
 namespace gold
 {
 
 // Return whether NAME is a local label name.  This is used to implement the
-// --discard-locals options and can be overriden by children classes to
+// --discard-locals options and can be overridden by child classes to
 // implement system-specific behaviour.  The logic here is the same as that
 // in _bfd_elf_is_local_label_name().
 
 bool
-Target::do_is_local_label_name (const char* name) const
+Target::do_is_local_label_name(const char* name) const
 {
   // Normal local symbols start with ``.L''.
   if (name[0] == '.' && name[1] == 'L')
@@ -55,4 +59,193 @@ Target::do_is_local_label_name (const char* name) const
   return false;
 }
 
+// Implementations of methods Target::do_make_elf_object are almost identical
+// except for the address sizes and endianities.  So we extract this
+// into a template.
+
+template<int size, bool big_endian>
+inline Object*
+Target::do_make_elf_object_implementation(
+    const std::string& name,
+    Input_file* input_file,
+    off_t offset,
+    const elfcpp::Ehdr<size, big_endian>& ehdr)
+{
+  int et = ehdr.get_e_type();
+  // ET_EXEC files are valid input for --just-symbols/-R,
+  // and we treat them as relocatable objects.
+  if (et == elfcpp::ET_REL
+      || (et == elfcpp::ET_EXEC && input_file->just_symbols()))
+    {
+      Sized_relobj_file<size, big_endian>* obj =
+	new Sized_relobj_file<size, big_endian>(name, input_file, offset, ehdr);
+      obj->setup();
+      return obj;
+    }
+  else if (et == elfcpp::ET_DYN)
+    {
+      Sized_dynobj<size, big_endian>* obj =
+	new Sized_dynobj<size, big_endian>(name, input_file, offset, ehdr);
+      obj->setup();
+      return obj;
+    }
+  else
+    {
+      gold_error(_("%s: unsupported ELF file type %d"),
+		 name.c_str(), et);
+      return NULL;
+    }
+}
+
+// Make an ELF object called NAME by reading INPUT_FILE at OFFSET.  EHDR
+// is the ELF header of the object.  There are four versions of this
+// for different address sizes and endianities.
+
+#ifdef HAVE_TARGET_32_LITTLE
+Object*
+Target::do_make_elf_object(const std::string& name, Input_file* input_file,
+			   off_t offset, const elfcpp::Ehdr<32, false>& ehdr)
+{
+  return this->do_make_elf_object_implementation<32, false>(name, input_file,
+							    offset, ehdr);
+}
+#endif
+
+#ifdef HAVE_TARGET_32_BIG
+Object*
+Target::do_make_elf_object(const std::string& name, Input_file* input_file,
+			   off_t offset, const elfcpp::Ehdr<32, true>& ehdr)
+{
+  return this->do_make_elf_object_implementation<32, true>(name, input_file,
+							   offset, ehdr);
+}
+#endif
+
+#ifdef HAVE_TARGET_64_LITTLE
+Object*
+Target::do_make_elf_object(const std::string& name, Input_file* input_file,
+			   off_t offset, const elfcpp::Ehdr<64, false>& ehdr)
+{
+  return this->do_make_elf_object_implementation<64, false>(name, input_file,
+							    offset, ehdr);
+}
+#endif
+
+#ifdef HAVE_TARGET_64_BIG
+Object*
+Target::do_make_elf_object(const std::string& name, Input_file* input_file,
+			   off_t offset, const elfcpp::Ehdr<64, true>& ehdr)
+{
+  return this->do_make_elf_object_implementation<64, true>(name, input_file,
+							   offset, ehdr);
+}
+#endif
+
+Output_section*
+Target::do_make_output_section(const char* name, elfcpp::Elf_Word type,
+			       elfcpp::Elf_Xword flags)
+{
+  return new Output_section(name, type, flags);
+}
+
+// Default for whether a reloc is a call to a non-split function is
+// whether the symbol is a function.
+
+bool
+Target::do_is_call_to_non_split(const Symbol* sym, unsigned int) const
+{
+  return sym->type() == elfcpp::STT_FUNC;
+}
+
+// Default conversion for -fsplit-stack is to give an error.
+
+void
+Target::do_calls_non_split(Relobj* object, unsigned int, section_offset_type,
+			   section_size_type, unsigned char*, section_size_type,
+			   std::string*, std::string*) const
+{
+  static bool warned;
+  if (!warned)
+    {
+      gold_error(_("linker does not include stack split support "
+		   "required by %s"),
+		 object->name().c_str());
+      warned = true;
+    }
+}
+
+//  Return whether BYTES/LEN matches VIEW/VIEW_SIZE at OFFSET.
+
+bool
+Target::match_view(const unsigned char* view, section_size_type view_size,
+		   section_offset_type offset, const char* bytes,
+		   size_t len) const
+{
+  if (offset + len > view_size)
+    return false;
+  return memcmp(view + offset, bytes, len) == 0;
+}
+
+// Set the contents of a VIEW/VIEW_SIZE to nops starting at OFFSET
+// for LEN bytes.
+
+void
+Target::set_view_to_nop(unsigned char* view, section_size_type view_size,
+			section_offset_type offset, size_t len) const
+{
+  gold_assert(offset >= 0 && offset + len <= view_size);
+  if (!this->has_code_fill())
+    memset(view + offset, 0, len);
+  else
+    {
+      std::string fill = this->code_fill(len);
+      memcpy(view + offset, fill.data(), len);
+    }
+}
+
+// Class Sized_target.
+
+// Set the EI_OSABI field of the ELF header if requested.
+
+template<int size, bool big_endian>
+void
+Sized_target<size, big_endian>::do_adjust_elf_header(unsigned char* view,
+						     int len) const
+{
+  elfcpp::ELFOSABI osabi = this->osabi();
+  if (osabi != elfcpp::ELFOSABI_NONE)
+    {
+      gold_assert(len == elfcpp::Elf_sizes<size>::ehdr_size);
+
+      elfcpp::Ehdr<size, false> ehdr(view);
+      unsigned char e_ident[elfcpp::EI_NIDENT];
+      memcpy(e_ident, ehdr.get_e_ident(), elfcpp::EI_NIDENT);
+
+      e_ident[elfcpp::EI_OSABI] = osabi;
+
+      elfcpp::Ehdr_write<size, false> oehdr(view);
+      oehdr.put_e_ident(e_ident);
+    }
+}
+
+#ifdef HAVE_TARGET_32_LITTLE
+template
+class Sized_target<32, false>;
+#endif
+
+#ifdef HAVE_TARGET_32_BIG
+template
+class Sized_target<32, true>;
+#endif
+
+#ifdef HAVE_TARGET_64_LITTLE
+template
+class Sized_target<64, false>;
+#endif
+
+#ifdef HAVE_TARGET_64_BIG
+template
+class Sized_target<64, true>;
+#endif
+
 } // End namespace gold.