2009-12-05 Doug Kwan <dougkwan@google.com>

elfcpp/ChangeLog:

	* arm.h: Define enums for Tag_CPU_arch EABI attribute.

gold/ChangeLog:
	* arm.cc (Target_arm::arm_info): Initialize new fields
	attributes_section and attributes_vendor.
	* i386.cc (Target_i386::i386_info): Same.
	* object.cc (Sized_relobj::do_layout): Skip attribute section.
	* gold/powerpc.cc (Target_powerpc::powerpc_info): Initialize new
	fields attributes_section and attributes_vendor.
 	* sparc.cc (Target_sparc::sparc_info): Same.
	* target.h (Target::attributes_section, Target::attributes_vendor,
	Target::is_attributes_section, Target::attribute_arg_type,
	Target::attributes_order): New method definitions.
	(Target::Target_info::attributes_section,
	Target::Target_info::attributes_vendor): New fields.
	(Target::do_attribute_arg_type, Target::do_attributes_order): New
	virtual method definitions.
	* x86_64.cc (Target_x86_64::x86_64_info): Initialize new fields
	attributes_section and attributes_vendor.
	* testsuite/testfile.cc (Target_test::test_target_info): Same.

elfcpp/ChangeLog

@@ -1,3 +1,7 @@
+2009-12-05  Doug Kwan  <dougkwan@google.com>
+
+	* arm.h: Define enums for Tag_CPU_arch EABI attribute.
+
 2009-11-24  Rafael Avila de Espindola  <espindola@google.com>
 
 	* elfcpp_file.h: Include elfcpp.h.

elfcpp/arm.h

@@ -222,6 +222,29 @@ inline Elf_Word
 arm_eabi_version(Elf_Word flags)
 { return flags & EF_ARM_EABIMASK; }
 
+// Values for the Tag_CPU_arch EABI attribute.
+enum
+{
+  TAG_CPU_ARCH_PRE_V4,
+  TAG_CPU_ARCH_V4,
+  TAG_CPU_ARCH_V4T,
+  TAG_CPU_ARCH_V5T,
+  TAG_CPU_ARCH_V5TE,
+  TAG_CPU_ARCH_V5TEJ,
+  TAG_CPU_ARCH_V6,
+  TAG_CPU_ARCH_V6KZ,
+  TAG_CPU_ARCH_V6T2,
+  TAG_CPU_ARCH_V6K,
+  TAG_CPU_ARCH_V7,
+  TAG_CPU_ARCH_V6_M,
+  TAG_CPU_ARCH_V6S_M,
+  TAG_CPU_ARCH_V7E_M,
+  MAX_TAG_CPU_ARCH = TAG_CPU_ARCH_V7E_M,
+  // Pseudo-architecture to allow objects to be compatible with the subset of
+  // armv4t and armv6-m.  This value should never be stored in object files.
+  TAG_CPU_ARCH_V4T_PLUS_V6_M = (MAX_TAG_CPU_ARCH + 1)
+};
+
 } // End namespace elfcpp.
 
 #endif // !defined(ELFCPP_ARM_H)

gold/ChangeLog

@@ -1,3 +1,23 @@
+2009-12-05  Doug Kwan  <dougkwan@google.com>
+
+	* arm.cc (Target_arm::arm_info): Initialize new fields
+	attributes_section and attributes_vendor.
+	* i386.cc (Target_i386::i386_info): Same.
+	* object.cc (Sized_relobj::do_layout): Skip attribute section.
+	* gold/powerpc.cc (Target_powerpc::powerpc_info): Initialize new
+	fields attributes_section and attributes_vendor.
+ 	* sparc.cc (Target_sparc::sparc_info): Same.
+	* target.h (Target::attributes_section, Target::attributes_vendor,
+	Target::is_attributes_section, Target::attribute_arg_type,
+	Target::attributes_order): New method definitions.
+	(Target::Target_info::attributes_section,
+	Target::Target_info::attributes_vendor): New fields.
+	(Target::do_attribute_arg_type, Target::do_attributes_order): New
+	virtual method definitions.
+	* x86_64.cc (Target_x86_64::x86_64_info): Initialize new fields
+	attributes_section and attributes_vendor.
+	* testsuite/testfile.cc (Target_test::test_target_info): Same.
+
 2009-12-05  Doug Kwan  <dougkwan@google.com>
 
 	* arm.cc: Update comments about interworking and stub generation.

gold/arm.cc

@@ -1665,7 +1665,9 @@ const Target::Target_info Target_arm<big_endian>::arm_info =
   elfcpp::SHN_UNDEF,	// small_common_shndx
   elfcpp::SHN_UNDEF,	// large_common_shndx
   0,			// small_common_section_flags
-  0			// large_common_section_flags
+  0,			// large_common_section_flags
+  ".ARM.attributes",	// attributes_section
+  "aeabi"		// attributes_vendor
 };
 
 // Arm relocate functions class

gold/i386.cc

@@ -441,7 +441,9 @@ const Target::Target_info Target_i386::i386_info =
   elfcpp::SHN_UNDEF,	// small_common_shndx
   elfcpp::SHN_UNDEF,	// large_common_shndx
   0,			// small_common_section_flags
-  0			// large_common_section_flags
+  0,			// large_common_section_flags
+  NULL,			// attributes_section
+  NULL			// attributes_vendor
 };
 
 // Get the GOT section, creating it if necessary.

gold/object.cc

@@ -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)
             {

gold/powerpc.cc

@@ -342,7 +342,9 @@ Target::Target_info Target_powerpc<32, true>::powerpc_info =
   elfcpp::SHN_UNDEF,	// small_common_shndx
   elfcpp::SHN_UNDEF,	// large_common_shndx
   0,			// small_common_section_flags
-  0			// large_common_section_flags
+  0,			// large_common_section_flags
+  NULL,			// attributes_section
+  NULL			// attributes_vendor
 };
 
 template<>
@@ -363,7 +365,9 @@ Target::Target_info Target_powerpc<32, false>::powerpc_info =
   elfcpp::SHN_UNDEF,	// small_common_shndx
   elfcpp::SHN_UNDEF,	// large_common_shndx
   0,			// small_common_section_flags
-  0			// large_common_section_flags
+  0,			// large_common_section_flags
+  NULL,			// attributes_section
+  NULL			// attributes_vendor
 };
 
 template<>
@@ -384,7 +388,9 @@ Target::Target_info Target_powerpc<64, true>::powerpc_info =
   elfcpp::SHN_UNDEF,	// small_common_shndx
   elfcpp::SHN_UNDEF,	// large_common_shndx
   0,			// small_common_section_flags
-  0			// large_common_section_flags
+  0,			// large_common_section_flags
+  NULL,			// attributes_section
+  NULL			// attributes_vendor
 };
 
 template<>
@@ -405,7 +411,9 @@ Target::Target_info Target_powerpc<64, false>::powerpc_info =
   elfcpp::SHN_UNDEF,	// small_common_shndx
   elfcpp::SHN_UNDEF,	// large_common_shndx
   0,			// small_common_section_flags
-  0			// large_common_section_flags
+  0,			// large_common_section_flags
+  NULL,			// attributes_section
+  NULL			// attributes_vendor
 };
 
 template<int size, bool big_endian>

gold/sparc.cc

@@ -361,7 +361,9 @@ Target::Target_info Target_sparc<32, true>::sparc_info =
   elfcpp::SHN_UNDEF,	// small_common_shndx
   elfcpp::SHN_UNDEF,	// large_common_shndx
   0,			// small_common_section_flags
-  0			// large_common_section_flags
+  0,			// large_common_section_flags
+  NULL,			// attributes_section
+  NULL			// attributes_vendor
 };
 
 template<>
@@ -382,7 +384,9 @@ Target::Target_info Target_sparc<64, true>::sparc_info =
   elfcpp::SHN_UNDEF,	// small_common_shndx
   elfcpp::SHN_UNDEF,	// large_common_shndx
   0,			// small_common_section_flags
-  0			// large_common_section_flags
+  0,			// large_common_section_flags
+  NULL,			// attributes_section
+  NULL			// attributes_vendor
 };
 
 // We have to take care here, even when operating in little-endian

gold/target.h

@@ -282,6 +282,39 @@ class Target
     return this->do_relax(pass, input_objects, symtab, layout);
   } 
 
+  // Return the target-specific name of attributes section.  This is
+  // NULL if a target does not use attributes section or if it uses
+  // the default section name ".gnu.attributes".
+  const char*
+  attributes_section() const
+  { return this->pti_->attributes_section; }
+
+  // Return the vendor name of vendor attributes.
+  const char*
+  attributes_vendor() const
+  { return this->pti_->attributes_vendor; }
+
+  // Whether a section called NAME is an attribute section.
+  bool
+  is_attributes_section(const char* name) const
+  {
+    return ((this->pti_->attributes_section != NULL
+	     && strcmp(name, this->pti_->attributes_section) == 0)
+	    || strcmp(name, ".gnu.attributes") == 0); 
+  }
+
+  // Return a bit mask of argument types for attribute with TAG.
+  int
+  attribute_arg_type(int tag) const
+  { return this->do_attribute_arg_type(tag); }
+
+  // Return the attribute tag of the position NUM in the list of fixed
+  // attributes.  Normally there is no reordering and
+  // attributes_order(NUM) == NUM.
+  int
+  attributes_order(int num) const
+  { return this->do_attributes_order(num); }
+
  protected:
   // This struct holds the constant information for a child class.  We
   // use a struct to avoid the overhead of virtual function calls for
@@ -323,6 +356,10 @@ class Target
     elfcpp::Elf_Xword small_common_section_flags;
     // Section flags for large common section.
     elfcpp::Elf_Xword large_common_section_flags;
+    // Name of attributes section if it is not ".gnu.attributes".
+    const char* attributes_section;
+    // Vendor name of vendor attributes.
+    const char* attributes_vendor;
   };
 
   Target(const Target_info* pti)
@@ -440,6 +477,17 @@ class Target
   set_view_to_nop(unsigned char* view, section_size_type view_size,
 		  section_offset_type offset, size_t len) const;
 
+  // This must be overriden by the child class if it has target-specific
+  // attributes subsection in the attribute section. 
+  virtual int
+  do_attribute_arg_type(int) const
+  { gold_unreachable(); }
+
+  // This may be overridden by the child class.
+  virtual int
+  do_attributes_order(int num) const
+  { return num; }
+
  private:
   // The implementations of the four do_make_elf_object virtual functions are
   // almost identical except for their sizes and endianity.  We use a template.

gold/testsuite/testfile.cc

@@ -101,7 +101,9 @@ const Target::Target_info Target_test<size, big_endian>::test_target_info =
   elfcpp::SHN_UNDEF,			// small_common_shndx
   elfcpp::SHN_UNDEF,			// large_common_shndx
   0,					// small_common_section_flags
-  0					// large_common_section_flags
+  0,					// large_common_section_flags
+  NULL,					// attributes_section
+  NULL					// attributes_vendor
 };
 
 // The test targets.

gold/x86_64.cc

@@ -439,7 +439,9 @@ const Target::Target_info Target_x86_64::x86_64_info =
   elfcpp::SHN_UNDEF,	// small_common_shndx
   elfcpp::SHN_X86_64_LCOMMON,	// large_common_shndx
   0,			// small_common_section_flags
-  elfcpp::SHF_X86_64_LARGE	// large_common_section_flags
+  elfcpp::SHF_X86_64_LARGE,	// large_common_section_flags
+  NULL,			// attributes_section
+  NULL			// attributes_vendor
 };
 
 // This is called when a new output section is created.  This is where