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* options.h (class General_options): Define

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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.
This commit is contained in:
Ian Lance Taylor
2009-10-06 22:58:27 +00:00
parent 5aafa1cc49
commit 364c7fa5c9
32 changed files with 1321 additions and 63 deletions
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73
gold/object.h
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@@ -195,7 +195,8 @@ class Object
Object(const std::string& name, Input_file* input_file, bool is_dynamic,
off_t offset = 0)
: name_(name), input_file_(input_file), offset_(offset), shnum_(-1U),
is_dynamic_(is_dynamic), xindex_(NULL), no_export_(false)
is_dynamic_(is_dynamic), uses_split_stack_(false),
has_no_split_stack_(false), xindex_(NULL), no_export_(false)
{ input_file->file().add_object(); }
virtual ~Object()
@@ -216,6 +217,17 @@ class Object
is_dynamic() const
{ return this->is_dynamic_; }
// Return whether this object was compiled with -fsplit-stack.
bool
uses_split_stack() const
{ return this->uses_split_stack_; }
// Return whether this object contains any functions compiled with
// the no_split_stack attribute.
bool
has_no_split_stack() const
{ return this->has_no_split_stack_; }
// Returns NULL for Objects that are not plugin objects. This method
// is overridden in the Pluginobj class.
Pluginobj*
@@ -556,6 +568,12 @@ class Object
handle_gnu_warning_section(const char* name, unsigned int shndx,
Symbol_table*);
// If NAME is the name of the special section which indicates that
// this object was compiled with -fstack-split, mark it accordingly,
// and return true. Otherwise return false.
bool
handle_split_stack_section(const char* name);
private:
// This class may not be copied.
Object(const Object&);
@@ -572,6 +590,11 @@ class Object
unsigned int shnum_;
// Whether this is a dynamic object.
bool is_dynamic_;
// Whether this object was compiled with -fsplit-stack.
bool uses_split_stack_;
// Whether this object contains any functions compiled with the
// no_split_stack attribute.
bool has_no_split_stack_;
// Many sections for objects with more than SHN_LORESERVE sections.
Xindex* xindex_;
// True if exclude this object from automatic symbol export.
@@ -1252,6 +1275,30 @@ class Got_offset_list
Got_offset_list* got_next_;
};
// This type is used to modify relocations for -fsplit-stack. It is
// indexed by relocation index, and means that the relocation at that
// index should use the symbol from the vector, rather than the one
// indicated by the relocation.
class Reloc_symbol_changes
{
public:
Reloc_symbol_changes(size_t count)
: vec_(count, NULL)
{ }
void
set(size_t i, Symbol* sym)
{ this->vec_[i] = sym; }
const Symbol*
operator[](size_t i) const
{ return this->vec_[i]; }
private:
std::vector<Symbol*> vec_;
};
// A regular object file. This is size and endian specific.
template<int size, bool big_endian>
@@ -1671,6 +1718,30 @@ class Sized_relobj : public Relobj
unsigned char* reloc_view,
section_size_type reloc_view_size);
// A type shared by split_stack_adjust_reltype and find_functions.
typedef std::map<section_offset_type, section_size_type> Function_offsets;
// Check for -fsplit-stack routines calling non-split-stack routines.
void
split_stack_adjust(const Symbol_table*, const unsigned char* pshdrs,
unsigned int sh_type, unsigned int shndx,
const unsigned char* prelocs, size_t reloc_count,
unsigned char* view, section_size_type view_size,
Reloc_symbol_changes** reloc_map);
template<int sh_type>
void
split_stack_adjust_reltype(const Symbol_table*, const unsigned char* pshdrs,
unsigned int shndx, const unsigned char* prelocs,
size_t reloc_count, unsigned char* view,
section_size_type view_size,
Reloc_symbol_changes** reloc_map);
// Find all functions in a section.
void
find_functions(const unsigned char* pshdrs, unsigned int shndx,
Function_offsets*);
// Initialize input to output maps for section symbols in merged
// sections.
void