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PR 10893

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* i386.cc (class Output_data_plt_i386): Update declarations.
	Define Global_ifunc and Local_ifunc types.  Add global_ifuncs_ and
	local_ifuncs_ fields.
	(Target_i386::do_plt_section_for_global): New function.
	(Target_i386::do_plt_section_for_local): New function.
	(Output_data_plt_i386::Output_data_plt_i386): Add symtab
	parameter; change all callers.  Initialize global_ifuncs_ and
	local_ifuncs_.  If doing a static link define __rel_iplt_start and
	__rel_iplt_end.
	(Output_data_plt_i386::add_entry): Handle IFUNC symbols.
	(Output_data_plt_i386::add_local_ifunc_entry): New function.
	(Output_data_plt_i386::do_write): Fix GOT entries for IFUNC
	symbols.
	(Target_i386::make_plt_section): New function, broken out of
	make_plt_entry.  Set sh_info field of .rel.plt to point to .plt.
	(Target_i386::make_plt_entry): Call make_plt_section.
	(Target_i386::make_local_ifunc_plt_entry): New function.
	(Target_i386::Scan::reloc_needs_iplt_for_ifunc): New function.
	(Target_i386::Scan::local): Handle IFUNC symbols.  Add
	R_386_IRELATIVE to switch.
	(Target_i386::Scan::global): Likewise.
	(Target_i386::Relocate::relocate): Likewise.
	(Target_i386::Relocatable_size_for_reloc): Add R_386_IRELATIVE to
	switch.
	* x86_64.cc (class Output_data_plt_x86_64): Update declarations.
	(Target_x86_64::do_plt_section_for_global): New function.
	(Target_x86_64::do_plt_section_for_local): New function.
	(Output_data_plt_x86_64::Output_data_plt_x86_64): Add symtab
	parameter; change all callers.  If doing a static link define
	__rela_iplt_start and __rela_iplt_end.
	(Output_data_plt_x86_64::add_entry): Handle IFUNC symbols.
	(Output_data_plt_x86_64::add_local_ifunc_entry): New function.
	(Target_x86_64::make_plt_section): Set sh_info field of .rel.plt
	to point to .plt.
	(Target_x86_64::make_local_ifunc_plt_entry): New function.
	(Target_x86_64::Scan::check_non_pic): Add R_X86_64_IRELATIVE to
	switch.
	(Target_x86_64::Scan::reloc_needs_iplt_for_ifunc): New function.
	(Target_x86_64::Scan::local): Handle IFUNC symbols.  Add
	R_X86_64_IRELATIVE to switch.
	(Target_x86_64::Scan::global): Likewise.
	(Target_x86_64::Relocate::relocate): Likewise.
	(Target_x86_64::Relocatable_size_for_reloc): Add R_X86_64_IRELATIVE to
	switch.
	* target.h (class Target): Add plt_section_for_global and
	plt_section_for_local functions.  Add do_plt_section_for_global
	and do_plt_section_for_local virtual functions.
	* symtab.h (Symbol::needs_plt_entry): Handle IFUNC symbol.  Add
	clarifying comments.
	(Symbol::use_plt_offset): Handle IFUNC symbol.
	* object.cc (Sized_relobj::Sized_relobj): Initialize
	local_plt_offsets_.
	(Sized_relobj::local_has_plt_offset): New function.
	(Sized_relobj::local_plt_offset): New function.
	(Sized_relobj::set_local_plt_offset): New function.
	(Sized_relobj::do_count): Handle IFUNC symbol.
	* object.h (class Symbol_value): Add is_ifunc_symbol_ field.  Take
	a bit away from input_shndx_ field.  Add set_is_func_symbol and
	is_ifunc_symbol functions.
	(class Sized_relobj): Update declarations.  Remove Tls_got_entry
	and Local_tls_got_offsets.  Define Local_plt_offsets.  Add
	local_plt_offsets_ field.
	(Sized_relobj::clear_local_symbols): Clear local_plt_offsets_.
	* output.h (class Output_section_data): Add non-const
	output_section function.
	(class Output_data_got): Update declarations.
	(class Output_data_got::Got_entry): Add use_plt_offset_ field.
	Add use_plt_offset parameter to global and local constructors.
	Change all callers.  Change local_sym_index_ field to 31 bits.
	Change GSYM_CODE and CONSTANT_CODE accordingly.
	* output.cc (Output_data_reloc_base::do_adjust_output_section): If
	doing a static link don't set sh_link field.
	(Output_data_got::Got_entry::write): Use PLT offset if
	appropriate.
	(Output_data_got::add_global_plt): New function.
	(Output_data_got::add_local_plt): New function.
	* target-reloc.h (relocate_section): Handle IFUNC symbol.
	* defstd.cc (in_section): Remove entries for __rel_iplt_start,
	__rel_iplt_end, __rela_iplt_start, and __rela_iplt_end.
	* configure.ac: Set IFUNC automake conditional for glibc >= 2.11.
	* testsuite/Makefile.am: Add a bunch of IFUNC tests, all within
	IFUNC conditional.
	* testsuite/ifunc-sel.h: New file.
	* testsuite/ifuncmain1.c: New file.
	* testsuite/ifuncmain1vis.c: New file.
	* testsuite/ifuncmod1.c: New file.
	* testsuite/ifuncdep2.c: New file.
	* testsuite/ifuncmain2.c: New file.
	* testsuite/ifuncmain3.c: New file.
	* testsuite/ifuncmod3.c: New file.
	* testsuite/ifuncmain4.c: New file.
	* testsuite/ifuncmain5.c: New file.
	* testsuite/ifuncmod5.c: New file.
	* testsuite/ifuncmain6pie.c: New file.
	* testsuite/ifuncmod6.c: New file.
	* testsuite/ifuncmain7.c: New file.
	* configure, testsuite/Makefile.in: Rebuild.
This commit is contained in:
Ian Lance Taylor 2010-08-19 22:50:16 +00:00
parent 43f3e2ee94
commit 7223e9ca5a
29 changed files with 2915 additions and 382 deletions
Download patch file Download diff file Expand all files Collapse all files

39
gold/object.cc
View file

@ -391,6 +391,7 @@ Sized_relobj<size, big_endian>::Sized_relobj(
local_dynsym_offset_(0),
local_values_(),
local_got_offsets_(),
local_plt_offsets_(),
kept_comdat_sections_(),
has_eh_frame_(false),
discarded_eh_frame_shndx_(-1U),
@ -1690,6 +1691,41 @@ Sized_relobj<size, big_endian>::do_should_include_member(Symbol_table* symtab,
return Archive::SHOULD_INCLUDE_UNKNOWN;
}
// Return whether the local symbol SYMNDX has a PLT offset.
template<int size, bool big_endian>
bool
Sized_relobj<size, big_endian>::local_has_plt_offset(unsigned int symndx) const
{
typename Local_plt_offsets::const_iterator p =
this->local_plt_offsets_.find(symndx);
return p != this->local_plt_offsets_.end();
}
// Get the PLT offset of a local symbol.
template<int size, bool big_endian>
unsigned int
Sized_relobj<size, big_endian>::local_plt_offset(unsigned int symndx) const
{
typename Local_plt_offsets::const_iterator p =
this->local_plt_offsets_.find(symndx);
gold_assert(p != this->local_plt_offsets_.end());
return p->second;
}
// Set the PLT offset of a local symbol.
template<int size, bool big_endian>
void
Sized_relobj<size, big_endian>::set_local_plt_offset(unsigned int symndx,
unsigned int plt_offset)
{
std::pair<typename Local_plt_offsets::iterator, bool> ins =
this->local_plt_offsets_.insert(std::make_pair(symndx, plt_offset));
gold_assert(ins.second);
}
// First pass over the local symbols. Here we add their names to
// *POOL and *DYNPOOL, and we store the symbol value in
// THIS->LOCAL_VALUES_. This function is always called from a
@ -1756,6 +1792,8 @@ Sized_relobj<size, big_endian>::do_count_local_symbols(Stringpool* pool,
lv.set_is_section_symbol();
else if (sym.get_st_type() == elfcpp::STT_TLS)
lv.set_is_tls_symbol();
else if (sym.get_st_type() == elfcpp::STT_GNU_IFUNC)
lv.set_is_ifunc_symbol();
// Save the input symbol value for use in do_finalize_local_symbols().
lv.set_input_value(sym.get_st_value());
@ -2065,7 +2103,6 @@ Sized_relobj<size, big_endian>::do_section_entsize(unsigned int shndx)
return shdr.get_sh_entsize();
}
// Write out the local symbols.
template<int size, bool big_endian>