binutils-gdb/gold/nacl.h

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* configure.ac (ENABLE_GOLD): Consider *-*-nacl* targets ELF. * configure: Regenerate. gold/ * nacl.cc: New file. * nacl.h: New file. * Makefile.am (CCFILES, HFILES): Add them. * Makefile.in: Regenerate. * i386.cc (Output_data_plt_i386_nacl): New class. (Output_data_plt_i386_nacl_exec): New class. (Output_data_plt_i386_nacl_dyn): New class. (Target_i386_nacl): New class. (Target_selector_i386_nacl): New class. (target_selector_i386): Use it instead of Target_selector_i386. * x86_64.cc (Output_data_plt_x86_64_nacl): New class. (Target_x86_64_nacl): New class. (Target_selector_x86_64_nacl): New class. (target_selector_x86_64, target_selector_x32): Use it instead of Target_selector_x86_64. * arm.cc (Output_data_plt_arm_nacl): New class. (Target_arm_nacl): New class. (Target_selector_arm_nacl): New class. (target_selector_arm, target_selector_armbe): Use it instead of Target_selector_arm. * target-select.cc (select_target): Take new Input_file* and off_t arguments, pass them on to recognize method of selector. * object.cc (make_elf_sized_object): Update caller. * parameters.cc (parameters_force_valid_target): Likewise. * incremental.cc (make_sized_incremental_binary): Likewise. * target-select.h: Update decl. (Target_selector::recognize): Take new Input_file* argument, pass it on to do_recognize. (Target_selector::do_recognize): Take new Input_file* argument. * freebsd.h (Target_selector_freebsd::do_recognize): Likewise. * powerpc.cc (Target_selector_powerpc::do_recognize): Likewise. * sparc.cc (Target_selector_sparc::do_recognize): Likewise. * testsuite/testfile.cc (Target_selector::do_recognize): Likewise. * target.h (Target::Target_info): New members isolate_execinstr and rosegment_gap. (Target::isolate_execinstr, Target::rosegment_gap): New methods. * arm.cc (Target_arm::arm_info): Update initializer. * i386.cc (Target_i386::i386_info): Likewise. * powerpc.cc (Target_powerpc::powerpc_info): Likewise. * sparc.cc (Target_sparc::sparc_info): Likewise. * x86_64.cc (Target_x86_64::x86_64_info): Likewise. * testsuite/testfile.cc (Target_test::test_target_info): Likewise. * layout.cc (Layout::attach_allocated_section_to_segment): Take new const Target* argument. If target->isolate_execinstr(), act like --rosegment. (Layout::find_first_load_seg): Take new const Target* argument; if target->isolate_execinstr(), reject PF_X segments. (Layout::relaxation_loop_body): Update caller. (Layout::set_segment_offsets): If target->isolate_execinstr(), reset file offset to zero when we hit LOAD_SEG, and then do a second loop over the segments before LOAD_SEG to reassign offsets after addresses have been determined. Handle target->rosegment_gap(). (Layout::attach_section_to_segment): Take new const Target* argument; pass it to attach_allocated_section_to_segment. (Layout::make_output_section): Update caller. (Layout::attach_sections_to_segments): Take new const Target* argument; pass it to attach_section_to_segment. * gold.cc (queue_middle_tasks): Update caller. * layout.h (Layout): Update method decls with new arguments. * arm.cc (Target_arm::Target_arm): Take optional argument for the Target_info pointer to use. (Target_arm::do_make_data_plt): New virtual method. (Target_arm::make_data_plt): New method that calls it. (Target_arm::make_plt_entry): Use it. (Output_data_plt_arm::Output_data_plt_arm): Take additional argument for the section alignment. (Output_data_plt_arm::do_first_plt_entry_offset): New abstract virtual method. (Output_data_plt_arm::first_plt_entry_offset): Call it. (Output_data_plt_arm::do_get_plt_entry_size): New abstract virtual method. (Output_data_plt_arm::get_plt_entry_size): Call it. (Output_data_plt_arm::do_fill_plt_entry): New abstract virtual method. (Output_data_plt_arm::fill_plt_entry): New method that calls it. (Output_data_plt_arm::do_fill_first_plt_entry): New abstract virtual method. (Output_data_plt_arm::fill_first_plt_entry): New method that calls it. (Output_data_plt_arm::set_final_data_size): Use get_plt_entry_size method instead of sizeof(plt_entry). (Output_data_plt_arm::add_entry): Likewise. Use first_plt_entry_offset method instead of sizeof(first_plt_entry). (Target_arm::first_plt_entry_offset): Call method on this->plt_ rather than static method. (Target_arm::plt_entry_size): Likewise. (Output_data_plt_arm::first_plt_entry, Output_data_plt_arm::plt_entry): Move to ... (Output_data_plt_arm_standard): ... here, new class. (Output_data_plt_arm::do_write): Move guts of PLT filling to... (Output_data_plt_arm_standard::do_fill_first_plt_entry): ... here ... (Output_data_plt_arm_standard::do_fill_plt_entry): ... and here. * x86_64.cc (Output_data_plt_x86_64::Output_data_plt_x86_64): Take additional argument for the PLT entry size. (Output_data_plt_x86_64::get_tlsdesc_plt_offset): Use get_plt_entry_size method rather than plt_entry_size variable. (Output_data_plt_x86_64::reserve_slot): Likewise. (Output_data_plt_x86_64::do_adjust_output_section): Likewise. (Output_data_plt_x86_64::add_entry): Likewise. (Output_data_plt_x86_64::add_local_ifunc_entry): Likewise. (Output_data_plt_x86_64::address_for_global): Likewise. (Output_data_plt_x86_64::address_for_local): Likewise. (Output_data_plt_x86_64::set_final_data_size): Likewise. (Output_data_plt_x86_64::first_plt_entry_offset): Likewise. Make method non-static. (Output_data_plt_x86_64::do_get_plt_entry_size): New abstract virtual method. (Output_data_plt_x86_64::get_plt_entry_size): Just call that. (Output_data_plt_x86_64::do_add_eh_frame): New abstract virtual method. (Output_data_plt_x86_64::add_eh_frame): New method to call it. (Output_data_plt_x86_64::do_fill_first_plt_entry): New abstract virtual method. (Output_data_plt_x86_64::fill_first_plt_entry): New method to call it. (Output_data_plt_x86_64::do_fill_plt_entry): New abstract virtual method. (Output_data_plt_x86_64::fill_plt_entry): New method to call it. (Output_data_plt_x86_64::do_fill_tlsdesc_entry): New abstract virtual method. (Output_data_plt_x86_64::fill_tlsdesc_entry): New method to call it. (Output_data_plt_x86_64::plt_entry_size) (Output_data_plt_x86_64::first_plt_entry) (Output_data_plt_x86_64::plt_entry) (Output_data_plt_x86_64::tlsdesc_plt_entry) (Output_data_plt_x86_64::plt_eh_frame_fde_size) (Output_data_plt_x86_64::plt_eh_frame_fde): Move to ... (Output_data_plt_x86_64_standard): ... here, new class. (Target_x86_64::Target_x86_64): Take optional argument for the Target_info pointer to use. (Target_x86_64::do_make_data_plt): New virtual method. (Target_x86_64::make_data_plt): New method to call it. (Target_x86_64::init_got_plt_for_update): Use that. Call this->plt_->add_eh_frame method here. (Output_data_plt_x86_64::init): Don't do add_eh_frame_for_plt here. (Target_x86_64::first_plt_entry_offset): Call method on this->plt_ rather than static method. (Target_x86_64::plt_entry_size): Likewise. (Output_data_plt_x86_64::do_write): Use get_plt_entry_size method rather than plt_entry_size variable. Move guts of PLT filling to... (Output_data_plt_x86_64_standard::do_fill_first_plt_entry): ... here ... (Output_data_plt_x86_64_standard::do_fill_plt_entry): ... and here ... (Output_data_plt_x86_64_standard::do_fill_tlsdesc_entry): ... and here. * i386.cc (Output_data_plt_i386::Output_data_plt_i386): Take additional argument for the section alignment. Don't do add_eh_frame_for_plt here. (Output_data_plt_i386::first_plt_entry_offset): Make the method non-static. Use get_plt_entry_size method rather than plt_entry_size variable. (Output_data_plt_i386::do_get_plt_entry_size): New abstract virtual method. (Output_data_plt_i386::get_plt_entry_size): Call it. (Output_data_plt_i386::do_add_eh_frame): New abstract virtual method. (Output_data_plt_i386::add_eh_frame): New method to call it. (Output_data_plt_i386::do_fill_first_plt_entry): New abstract virtual method. (Output_data_plt_i386::fill_first_plt_entry): New method to call it. (Output_data_plt_i386::do_fill_plt_entry): New abstract virtual method. (Output_data_plt_i386::fill_plt_entry): New method to call it. (Output_data_plt_i386::set_final_data_size): Use get_plt_entry_size method instead of plt_entry_size. (Output_data_plt_i386::plt_entry_size) (Output_data_plt_i386::plt_eh_frame_fde_size) (Output_data_plt_i386::plt_eh_frame_fde): Move to ... (Output_data_plt_i386_standard): ... here, new class. (Output_data_plt_i386_exec): New class. (Output_data_plt_i386::exec_first_plt_entry): Move to ... (Output_data_plt_i386_exec::first_plt_entry): ... here. (Output_data_plt_i386::exec_plt_entry): Move to ... (Output_data_plt_i386_exec::plt_entry): ... here. (Output_data_plt_i386_dyn): New class. (Output_data_plt_i386::first_plt_entry): Move to ... (Output_data_plt_i386_dyn::first_plt_entry): ... here. (Output_data_plt_i386::dyn_plt_entry): Move to ... (Output_data_plt_i386_dyn::plt_entry): ... here. (Target_i386::Target_i386): Take optional argument for the Target_info pointer to use. (Target_i386::do_make_data_plt): New virtual method. (Target_i386::make_data_plt): New method to call it. (Target_i386::make_plt_section): Use that. Call this->plt_->add_eh_frame method here. (Output_data_plt_i386::add_entry): Use get_plt_entry_size method rather than plt_entry_size variable. (Output_data_plt_i386::add_local_ifunc_entry): Likewise. (Output_data_plt_i386::address_for_local): Likewise. (Output_data_plt_i386::do_write): Likewise. Move guts of PLT filling to... (Output_data_plt_i386_exec::do_fill_first_plt_entry): ... here ... (Output_data_plt_i386_exec::do_fill_plt_entry): ... and here ... (Output_data_plt_i386_dyn::do_fill_first_plt_entry): ... and here ... (Output_data_plt_i386_dyn::do_fill_plt_entry): ... and here. Change-Id: Id24b95600489835ff5e860a39c147203d4380c2b
2012-05-02 23:37:24 +02:00
// nacl.h -- Native Client support for gold -*- C++ -*-
// Copyright 2012 Free Software Foundation, Inc.
// This file is part of gold.
// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation; either version 3 of the License, or
// (at your option) any later version.
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
// MA 02110-1301, USA.
#include "elfcpp_file.h"
#include "fileread.h"
#include "layout.h"
#include "target-select.h"
#include "target.h"
#ifndef GOLD_NACL_H
#define GOLD_NACL_H
namespace gold
{
class Sniff_file
{
public:
Sniff_file(Input_file* input_file, off_t offset)
: file_(input_file->file()), offset_(offset)
{ }
class Location
{
public:
Location(off_t file_offset, off_t data_size)
: offset_(file_offset), size_(data_size)
{ }
inline off_t offset() const
{ return this->offset_; }
inline section_size_type size() const
{ return this->size_; }
private:
off_t offset_;
section_size_type size_;
};
class View
{
public:
View(File_read& file, off_t file_offset, off_t data_size)
: data_(file.get_view(0, file_offset, data_size, false, false))
{ }
const unsigned char* data()
{ return this->data_; }
private:
const unsigned char* data_;
};
View view(off_t file_offset, off_t data_size)
{
return View(this->file_, this->offset_ + file_offset, data_size);
}
View view(Location loc)
{
return this->view(loc.offset(), loc.size());
}
// Report an error.
void
error(const char* format, ...) const ATTRIBUTE_PRINTF_2;
private:
File_read& file_;
off_t offset_;
};
template<class base_selector, class nacl_target>
class Target_selector_nacl : public base_selector
{
public:
Target_selector_nacl(const char* nacl_abi_name,
const char* bfd_name, const char* emulation)
: base_selector(), is_nacl_(false), nacl_abi_name_(nacl_abi_name),
bfd_name_(bfd_name), emulation_(emulation)
{ }
protected:
virtual Target*
do_instantiate_target()
{
if (this->is_nacl_)
return new nacl_target();
return this->base_selector::do_instantiate_target();
}
virtual Target*
do_recognize(Input_file* file, off_t offset,
int machine, int osabi, int abiversion)
{
this->is_nacl_ = file != NULL && this->recognize_nacl_file(file, offset);
if (this->is_nacl_)
return this->instantiate_target();
return this->base_selector::do_recognize(file, offset,
machine, osabi, abiversion);
}
virtual Target*
do_recognize_by_bfd_name(const char* name)
{
gold_assert(this->bfd_name_ != NULL);
this->is_nacl_ = strcmp(name, this->bfd_name_) == 0;
if (this->is_nacl_)
return this->instantiate_target();
return this->base_selector::do_recognize_by_bfd_name(name);
}
virtual void
do_supported_bfd_names(std::vector<const char*>* names)
{
gold_assert(this->bfd_name_ != NULL);
this->base_selector::do_supported_bfd_names(names);
names->push_back(this->bfd_name_);
}
virtual void
do_supported_emulations(std::vector<const char*>* emulations)
{
gold_assert(this->emulation_ != NULL);
this->base_selector::do_supported_emulations(emulations);
emulations->push_back(this->emulation_);
}
virtual const char*
do_target_bfd_name(const Target* target)
{
return (!this->is_our_target(target)
? NULL
: (this->is_nacl_
? this->bfd_name_
: base_selector::do_target_bfd_name(target)));
}
private:
bool
recognize_nacl_file(Input_file* input_file, off_t offset)
{
if (this->is_big_endian())
{
#if defined(HAVE_TARGET_32_BIG) || defined(HAVE_TARGET_64_BIG)
# ifdef HAVE_TARGET_32_BIG
if (this->get_size() == 32)
return do_recognize_nacl_file<32, true>(input_file, offset);
# endif
# ifdef HAVE_TARGET_64_BIG
if (this->get_size() == 64)
return do_recognize_nacl_file<64, true>(input_file, offset);
# endif
#endif
gold_unreachable();
}
else
{
#if defined(HAVE_TARGET_32_LITTLE) || defined(HAVE_TARGET_64_LITTLE)
# ifdef HAVE_TARGET_32_LITTLE
if (this->get_size() == 32)
return do_recognize_nacl_file<32, false>(input_file, offset);
# endif
# ifdef HAVE_TARGET_64_LITTLE
if (this->get_size() == 64)
return do_recognize_nacl_file<64, false>(input_file, offset);
# endif
#endif
gold_unreachable();
}
}
template<int size, bool big_endian>
bool
do_recognize_nacl_file(Input_file* input_file, off_t offset)
{
Sniff_file file(input_file, offset);
elfcpp::Elf_file<size, big_endian, Sniff_file> elf_file(&file);
const unsigned int shnum = elf_file.shnum();
for (unsigned int shndx = 1; shndx < shnum; ++shndx)
{
if (elf_file.section_type(shndx) == elfcpp::SHT_NOTE)
{
Sniff_file::Location loc = elf_file.section_contents(shndx);
if (loc.size() < (3 * 4
+ align_address(sizeof "NaCl", 4)
+ align_address(nacl_abi_name_.size() + 1, 4)))
continue;
Sniff_file::View view(file.view(loc));
const unsigned char* note_data = view.data();
if ((elfcpp::Swap<32, big_endian>::readval(note_data + 0)
== sizeof "NaCl")
&& (elfcpp::Swap<32, big_endian>::readval(note_data + 4)
== nacl_abi_name_.size() + 1)
&& (elfcpp::Swap<32, big_endian>::readval(note_data + 8)
== elfcpp::NT_VERSION))
{
const unsigned char* name = note_data + 12;
const unsigned char* desc = (name
+ align_address(sizeof "NaCl", 4));
if (memcmp(name, "NaCl", sizeof "NaCl") == 0
&& memcmp(desc, nacl_abi_name_.c_str(),
nacl_abi_name_.size() + 1) == 0)
return true;
}
}
}
return false;
}
// Whether we decided this was the NaCl target variant.
bool is_nacl_;
// The string found in the NaCl ABI note.
std::string nacl_abi_name_;
// BFD name of NaCl target, for compatibility.
const char* const bfd_name_;
// GNU linker emulation for this NaCl target, for compatibility.
const char* const emulation_;
};
} // end namespace gold
#endif // !defined(GOLD_NACL_H)