* options.h (class General_options): Define

	split_stack_adjust_size parameter.
	* object.h (class Object): Add uses_split_stack_ and
	has_no_split_stack_ fields.  Add uses_split_stack and
	has_no_split_stack accessor functions.  Declare
	handle_split_stack_section.
	(class Reloc_symbol_changes): Define.
	(class Sized_relobj): Define Function_offsets.  Declare
	split_stack_adjust, split_stack_adjust_reltype, and
	find_functions.
	* object.cc (Object::handle_split_stack_section): New function.
	(Sized_relobj::do_layout): Call handle_split_stack_section.
	* dynobj.cc (Sized_dynobj::do_layout): Call
	handle_split_stack_section.
	* reloc.cc (Sized_relobj::relocate_sections): Call
	split_stack_adjust for executable sections in split_stack
	objects.  Pass reloc_map to relocate_section.
	(Sized_relobj::split_stack_adjust): New function.
	(Sized_relobj::split_stack_adjust_reltype): New function.
	(Sized_relobj::find_functions): New function.
	* target-reloc.h: Include "object.h".
	(relocate_section): Add reloc_symbol_changes parameter.  Change
	all callers.
	* target.h (class Target): Add calls_non_split method.  Declare
	do_calls_non_split virtual method.  Declare match_view and
	set_view_to_nop.
	* target.cc: Include "elfcpp.h".
	(Target::do_calls_non_split): New function.
	(Target::match_view): New function.
	(Target::set_view_to_nop): New function.
	* gold.cc (queue_middle_tasks): Give an error if mixing
	split-stack and non-split-stack objects with -r.
	* i386.cc (Target_i386::relocate_section): Add
	reloc_symbol_changes parameter.
	(Target_i386::do_calls_non_split): New function.
	* x86_64.cc (Target_x86_64::relocate_section): Add
	reloc_symbol_changes parameter.
	(Target_x86_64::do_calls_non_split): New function.
	* arm.cc (Target_arm::relocate_section): Add reloc_symbol_changes
	parameter.
	* powerpc.cc (Target_powerpc::relocate_section): Add
	reloc_symbol_changes parameter.
	* sparc.cc (Target_sparc::relocate_section): Add
	reloc_symbol_changes parameter.
	* configure.ac: Call AM_CONDITIONAL for the default target.
	* configure: Rebuild.
	* testsuite/Makefile.am (TEST_AS): New variable.
	(check_SCRIPTS): Add split_i386.sh and split_x86_64.sh.
	(check_DATA): Add split_i386 and split_x86_64 files.
	(SPLIT_DEFSYMS): Define.
	(split_i386_[1234n].o): New targets.
	(split_i386_[124]): New targets.
	(split_i386_[1234r].stdout): New targets.
	(split_x86_64_[1234n].o): New targets.
	(split_x86_64_[124]): New targets.
	(split_x86_64_[1234r].stdout): New targets.
	(MOSTLYCLEANFILES): Add new executables.
	* testsuite/split_i386.sh: New file.
	* testsuite/split_x86_64.sh: New file.
	* testsuite/split_i386_1.s: New file.
	* testsuite/split_i386_2.s: New file.
	* testsuite/split_i386_3.s: New file.
	* testsuite/split_i386_4.s: New file.
	* testsuite/split_i386_n.s: New file.
	* testsuite/split_x86_64_1.s: New file.
	* testsuite/split_x86_64_2.s: New file.
	* testsuite/split_x86_64_3.s: New file.
	* testsuite/split_x86_64_4.s: New file.
	* testsuite/split_x86_64_n.s: New file.
	* testsuite/testfile.cc (Target_test): Update relocation_section
	function.
	* testsuite/Makefile.in: Rebuild.

1 files changed, 40 insertions, 3 deletions

diff --git a/gold/target.h b/gold/target.h
index ac59fb2..68d89dc 100644
--- a/gold/target.h
+++ b/gold/target.h
@@ -43,11 +43,13 @@ namespace gold
 
 class General_options;
 class Object;
+class Relobj;
 template<int size, bool big_endian>
 class Sized_relobj;
 class Relocatable_relocs;
 template<int size, bool big_endian>
 class Relocate_info;
+class Reloc_symbol_changes;
 class Symbol;
 template<int size>
 class Sized_symbol;
@@ -217,6 +219,22 @@ class Target
   is_local_label_name(const char* name) const
   { return this->do_is_local_label_name(name); }
 
+  // A function starts at OFFSET in section SHNDX in OBJECT.  That
+  // function was compiled with -fsplit-stack, but it refers to a
+  // function which was compiled without -fsplit-stack.  VIEW is a
+  // modifiable view of the section; VIEW_SIZE is the size of the
+  // view.  The target has to adjust the function so that it allocates
+  // enough stack.
+  void
+  calls_non_split(Relobj* object, unsigned int shndx,
+		  section_offset_type fnoffset, section_size_type fnsize,
+		  unsigned char* view, section_size_type view_size,
+		  std::string* from, std::string* to) const
+  {
+    this->do_calls_non_split(object, shndx, fnoffset, fnsize, view, view_size,
+			     from, to);
+  }
+
   // Make an ELF object.
   template<int size, bool big_endian>
   Object*
@@ -244,7 +262,7 @@ class Target
       return pass < 2;
 
     return this->do_relax(pass);
-  } 
+  }
 
  protected:
   // This struct holds the constant information for a child class.  We
@@ -331,9 +349,15 @@ class Target
   virtual bool
   do_is_local_label_name(const char*) const;
 
+  // Virtual function which may be overridden by the child class.
+  virtual void
+  do_calls_non_split(Relobj* object, unsigned int, section_offset_type,
+		     section_size_type, unsigned char*, section_size_type,
+		     std::string*, std::string*) const;
+
   // make_elf_object hooks.  There are four versions of these for
   // different address sizes and endianities.
-  
+
 #ifdef HAVE_TARGET_32_LITTLE
   // Virtual functions which may be overriden by the child class.
   virtual Object*
@@ -372,6 +396,18 @@ class Target
   do_relax(int)
   { return false; }
 
+  // A function for targets to call.  Return whether BYTES/LEN matches
+  // VIEW/VIEW_SIZE at OFFSET.
+  bool
+  match_view(const unsigned char* view, section_size_type view_size,
+	     section_offset_type offset, const char* bytes, size_t len) const;
+
+  // Set the contents of a VIEW/VIEW_SIZE to nops starting at OFFSET
+  // for LEN bytes.
+  void
+  set_view_to_nop(unsigned char* view, section_size_type view_size,
+		  section_offset_type offset, size_t len) const;
+
  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.
@@ -478,7 +514,8 @@ class Sized_target : public Target
 		   bool needs_special_offset_handling,
 		   unsigned char* view,
 		   typename elfcpp::Elf_types<size>::Elf_Addr view_address,
-		   section_size_type view_size) = 0;
+		   section_size_type view_size,
+		   const Reloc_symbol_changes*) = 0;
 
   // Scan the relocs during a relocatable link.  The parameters are
   // like scan_relocs, with an additional Relocatable_relocs