053a4d680b
Initial patch to enable gold aarch64 backend.
This patch is just a skeleton which almost does nothing.
It does not support ILP32 now.
gold/ChangeLog:
* aarch64.cc: New file
* Makefile.am (TARGETSOURCES): Add aarch64.cc
(ALL_TARGETOBJS): Add aarch64.$(OBJEXT)
* Makefile.in: Regenerate.
* configure.tgt: Add entries for aarch64*.
* configure.ac: Likewise.
* configure: Likewise.
elfcpp/ChangeLog:
* aarch64.h: New file. New enums for aarch64-elf64 relocations.
* elfcpp.h (EM_AARCH64, SHT_AARCH64_ATTRIBUTES, PT_AARCH64_ARCHEXT,
PT_AARCH64_UNWIND): New enum constant.
1447 lines
43 KiB
C++
1447 lines
43 KiB
C++
// aarch64.cc -- aarch64 target support for gold.
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// Copyright (C) 2014 Free Software Foundation, Inc.
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// Written by Jing Yu <jingyu@google.com>.
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// This file is part of gold.
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// This program is free software; you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation; either version 3 of the License, or
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// (at your option) any later version.
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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// You should have received a copy of the GNU General Public License
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// along with this program; if not, write to the Free Software
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// Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
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// MA 02110-1301, USA.
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#include "gold.h"
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#include <cstring>
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#include "elfcpp.h"
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#include "dwarf.h"
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#include "parameters.h"
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#include "reloc.h"
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#include "aarch64.h"
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#include "object.h"
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#include "symtab.h"
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#include "layout.h"
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#include "output.h"
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#include "copy-relocs.h"
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#include "target.h"
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#include "target-reloc.h"
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#include "target-select.h"
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#include "tls.h"
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#include "freebsd.h"
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#include "nacl.h"
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#include "gc.h"
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#include "icf.h"
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// The first three .got.plt entries are reserved.
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const int32_t AARCH64_GOTPLT_RESERVE_COUNT = 3;
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namespace
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{
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using namespace gold;
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template<int size, bool big_endian>
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class Output_data_plt_aarch64;
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template<int size, bool big_endian>
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class Output_data_plt_aarch64_standard;
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template<int size, bool big_endian>
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class Target_aarch64;
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// Output_data_got_aarch64 class.
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template<int size, bool big_endian>
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class Output_data_got_aarch64 : public Output_data_got<size, big_endian>
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{
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public:
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typedef typename elfcpp::Elf_types<size>::Elf_Addr Valtype;
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Output_data_got_aarch64(Symbol_table* symtab, Layout* layout)
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: Output_data_got<size, big_endian>(), layout_(layout)
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{ }
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protected:
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// Write out the GOT table.
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void
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do_write(Output_file* of) {
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// The first entry in the GOT is the address of the .dynamic section.
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gold_assert(this->data_size() >= size / 8);
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Output_section* dynamic = this->layout_->dynamic_section();
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Valtype dynamic_addr = dynamic == NULL ? 0 : dynamic->address();
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this->replace_constant(0, dynamic_addr);
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Output_data_got<size, big_endian>::do_write(of);
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}
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private:
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// A pointer to the Layout class, so that we can find the .dynamic
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// section when we write out the GOT section.
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Layout* layout_;
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};
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// The aarch64 target class.
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// See the ABI at
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// http://infocenter.arm.com/help/topic/com.arm.doc.ihi0056b/IHI0056B_aaelf64.pdf
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template<int size, bool big_endian>
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class Target_aarch64 : public Sized_target<size, big_endian>
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{
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public:
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typedef Output_data_reloc<elfcpp::SHT_RELA, true, size, big_endian>
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Reloc_section;
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typedef typename elfcpp::Elf_types<size>::Elf_Addr Address;
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Target_aarch64(const Target::Target_info* info = &aarch64_info)
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: Sized_target<size, big_endian>(info),
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got_(NULL), plt_(NULL), got_plt_(NULL),
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global_offset_table_(NULL), rela_dyn_(NULL),
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copy_relocs_(elfcpp::R_AARCH64_COPY)
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{ }
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// Scan the relocations to determine unreferenced sections for
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// garbage collection.
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void
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gc_process_relocs(Symbol_table* symtab,
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Layout* layout,
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Sized_relobj_file<size, big_endian>* object,
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unsigned int data_shndx,
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unsigned int sh_type,
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const unsigned char* prelocs,
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size_t reloc_count,
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Output_section* output_section,
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bool needs_special_offset_handling,
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size_t local_symbol_count,
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const unsigned char* plocal_symbols);
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// Scan the relocations to look for symbol adjustments.
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void
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scan_relocs(Symbol_table* symtab,
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Layout* layout,
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Sized_relobj_file<size, big_endian>* object,
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unsigned int data_shndx,
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unsigned int sh_type,
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const unsigned char* prelocs,
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size_t reloc_count,
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Output_section* output_section,
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bool needs_special_offset_handling,
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size_t local_symbol_count,
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const unsigned char* plocal_symbols);
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// Finalize the sections.
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void
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do_finalize_sections(Layout*, const Input_objects*, Symbol_table*);
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// Relocate a section.
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void
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relocate_section(const Relocate_info<size, big_endian>*,
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unsigned int sh_type,
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const unsigned char* prelocs,
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size_t reloc_count,
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Output_section* output_section,
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bool needs_special_offset_handling,
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unsigned char* view,
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typename elfcpp::Elf_types<size>::Elf_Addr view_address,
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section_size_type view_size,
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const Reloc_symbol_changes*);
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// Scan the relocs during a relocatable link.
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void
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scan_relocatable_relocs(Symbol_table* symtab,
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Layout* layout,
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Sized_relobj_file<size, big_endian>* object,
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unsigned int data_shndx,
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unsigned int sh_type,
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const unsigned char* prelocs,
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size_t reloc_count,
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Output_section* output_section,
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bool needs_special_offset_handling,
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size_t local_symbol_count,
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const unsigned char* plocal_symbols,
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Relocatable_relocs*);
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// Relocate a section during a relocatable link.
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void
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relocate_relocs(
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const Relocate_info<size, big_endian>*,
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unsigned int sh_type,
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const unsigned char* prelocs,
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size_t reloc_count,
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Output_section* output_section,
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typename elfcpp::Elf_types<size>::Elf_Off offset_in_output_section,
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const Relocatable_relocs*,
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unsigned char* view,
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typename elfcpp::Elf_types<size>::Elf_Addr view_address,
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section_size_type view_size,
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unsigned char* reloc_view,
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section_size_type reloc_view_size);
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// Return the number of entries in the PLT.
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unsigned int
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plt_entry_count() const;
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//Return the offset of the first non-reserved PLT entry.
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unsigned int
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first_plt_entry_offset() const;
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// Return the size of each PLT entry.
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unsigned int
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plt_entry_size() const;
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private:
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// The class which scans relocations.
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class Scan
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{
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public:
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Scan()
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: issued_non_pic_error_(false)
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{ }
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static inline int
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get_reference_flags(unsigned int r_type);
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inline void
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local(Symbol_table* symtab, Layout* layout, Target_aarch64* target,
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Sized_relobj_file<size, big_endian>* object,
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unsigned int data_shndx,
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Output_section* output_section,
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const elfcpp::Rela<size, big_endian>& reloc, unsigned int r_type,
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const elfcpp::Sym<size, big_endian>& lsym,
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bool is_discarded);
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inline void
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global(Symbol_table* symtab, Layout* layout, Target_aarch64* target,
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Sized_relobj_file<size, big_endian>* object,
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unsigned int data_shndx,
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Output_section* output_section,
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const elfcpp::Rela<size, big_endian>& reloc, unsigned int r_type,
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Symbol* gsym);
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inline bool
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local_reloc_may_be_function_pointer(Symbol_table* , Layout* ,
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Target_aarch64<size, big_endian>* ,
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Sized_relobj_file<size, big_endian>* ,
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unsigned int ,
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Output_section* ,
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const elfcpp::Rela<size, big_endian>& ,
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unsigned int r_type,
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const elfcpp::Sym<size, big_endian>&);
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inline bool
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global_reloc_may_be_function_pointer(Symbol_table* , Layout* ,
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Target_aarch64<size, big_endian>* ,
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Sized_relobj_file<size, big_endian>* ,
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unsigned int ,
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Output_section* ,
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const elfcpp::Rela<size, big_endian>& ,
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unsigned int r_type,
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Symbol* gsym);
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private:
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static void
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unsupported_reloc_local(Sized_relobj_file<size, big_endian>*,
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unsigned int r_type);
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static void
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unsupported_reloc_global(Sized_relobj_file<size, big_endian>*,
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unsigned int r_type, Symbol*);
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inline bool
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possible_function_pointer_reloc(unsigned int r_type);
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void
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check_non_pic(Relobj*, unsigned int r_type);
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// Whether we have issued an error about a non-PIC compilation.
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bool issued_non_pic_error_;
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};
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// The class which implements relocation.
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class Relocate
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{
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public:
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Relocate()
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{ }
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~Relocate()
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{ }
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// Do a relocation. Return false if the caller should not issue
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// any warnings about this relocation.
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inline bool
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relocate(const Relocate_info<size, big_endian>*, Target_aarch64*,
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Output_section*,
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size_t relnum, const elfcpp::Rela<size, big_endian>&,
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unsigned int r_type, const Sized_symbol<size>*,
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const Symbol_value<size>*,
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unsigned char*, typename elfcpp::Elf_types<size>::Elf_Addr,
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section_size_type);
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};
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// A class which returns the size required for a relocation type,
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// used while scanning relocs during a relocatable link.
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class Relocatable_size_for_reloc
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{
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public:
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unsigned int
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get_size_for_reloc(unsigned int, Relobj*);
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};
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// Adjust TLS relocation type based on the options and whether this
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// is a local symbol.
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static tls::Tls_optimization
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optimize_tls_reloc(bool is_final, int r_type);
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// Get the GOT section, creating it if necessary.
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Output_data_got_aarch64<size, big_endian>*
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got_section(Symbol_table*, Layout*);
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// Get the GOT PLT section.
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Output_data_space*
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got_plt_section() const
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{
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gold_assert(this->got_plt_ != NULL);
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return this->got_plt_;
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}
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// Create the PLT section.
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void
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make_plt_section(Symbol_table* symtab, Layout* layout);
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// Create a PLT entry for a global symbol.
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void
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make_plt_entry(Symbol_table*, Layout*, Symbol*);
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// Get the PLT section.
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Output_data_plt_aarch64<size, big_endian>*
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plt_section() const
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{
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gold_assert(this->plt_ != NULL);
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return this->plt_;
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}
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// Get the dynamic reloc section, creating it if necessary.
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Reloc_section*
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rela_dyn_section(Layout*);
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// Add a potential copy relocation.
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void
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copy_reloc(Symbol_table* symtab, Layout* layout,
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Sized_relobj_file<size, big_endian>* object,
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unsigned int shndx, Output_section* output_section,
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Symbol* sym, const elfcpp::Rela<size, big_endian>& reloc)
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{
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this->copy_relocs_.copy_reloc(symtab, layout,
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symtab->get_sized_symbol<size>(sym),
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object, shndx, output_section,
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reloc, this->rela_dyn_section(layout));
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}
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// Information about this specific target which we pass to the
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// general Target structure.
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static const Target::Target_info aarch64_info;
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// The types of GOT entries needed for this platform.
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// These values are exposed to the ABI in an incremental link.
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// Do not renumber existing values without changing the version
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// number of the .gnu_incremental_inputs section.
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enum Got_type
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{
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GOT_TYPE_STANDARD = 0, // GOT entry for a regular symbol
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GOT_TYPE_TLS_OFFSET = 1, // GOT entry for TLS offset
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GOT_TYPE_TLS_PAIR = 2, // GOT entry for TLS module/offset pair
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GOT_TYPE_TLS_DESC = 3 // GOT entry for TLS_DESC pair
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};
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// The GOT section.
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Output_data_got_aarch64<size, big_endian>* got_;
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// The PLT section.
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Output_data_plt_aarch64<size, big_endian>* plt_;
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// The GOT PLT section.
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Output_data_space* got_plt_;
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// The _GLOBAL_OFFSET_TABLE_ symbol.
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Symbol* global_offset_table_;
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// The dynamic reloc section.
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Reloc_section* rela_dyn_;
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// Relocs saved to avoid a COPY reloc.
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Copy_relocs<elfcpp::SHT_RELA, size, big_endian> copy_relocs_;
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};
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template<>
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const Target::Target_info Target_aarch64<64, false>::aarch64_info =
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{
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64, // size
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false, // is_big_endian
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elfcpp::EM_AARCH64, // machine_code
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false, // has_make_symbol
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false, // has_resolve
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false, // has_code_fill
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true, // is_default_stack_executable
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false, // can_icf_inline_merge_sections
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'\0', // wrap_char
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"/lib/ld.so.1", // program interpreter
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0x400000, // default_text_segment_address
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0x1000, // abi_pagesize (overridable by -z max-page-size)
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0x1000, // common_pagesize (overridable by -z common-page-size)
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false, // isolate_execinstr
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0, // rosegment_gap
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elfcpp::SHN_UNDEF, // small_common_shndx
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elfcpp::SHN_UNDEF, // large_common_shndx
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0, // small_common_section_flags
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0, // large_common_section_flags
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NULL, // attributes_section
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NULL, // attributes_vendor
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"_start" // entry_symbol_name
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};
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template<>
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const Target::Target_info Target_aarch64<32, false>::aarch64_info =
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{
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32, // size
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false, // is_big_endian
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elfcpp::EM_AARCH64, // machine_code
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false, // has_make_symbol
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false, // has_resolve
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false, // has_code_fill
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true, // is_default_stack_executable
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false, // can_icf_inline_merge_sections
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'\0', // wrap_char
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"/lib/ld.so.1", // program interpreter
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0x400000, // default_text_segment_address
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0x1000, // abi_pagesize (overridable by -z max-page-size)
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0x1000, // common_pagesize (overridable by -z common-page-size)
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false, // isolate_execinstr
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0, // rosegment_gap
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elfcpp::SHN_UNDEF, // small_common_shndx
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elfcpp::SHN_UNDEF, // large_common_shndx
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0, // small_common_section_flags
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0, // large_common_section_flags
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NULL, // attributes_section
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NULL, // attributes_vendor
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"_start" // entry_symbol_name
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};
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template<>
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const Target::Target_info Target_aarch64<64, true>::aarch64_info =
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{
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64, // size
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true, // is_big_endian
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elfcpp::EM_AARCH64, // machine_code
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false, // has_make_symbol
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false, // has_resolve
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false, // has_code_fill
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true, // is_default_stack_executable
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false, // can_icf_inline_merge_sections
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'\0', // wrap_char
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"/lib/ld.so.1", // program interpreter
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0x400000, // default_text_segment_address
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0x1000, // abi_pagesize (overridable by -z max-page-size)
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0x1000, // common_pagesize (overridable by -z common-page-size)
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false, // isolate_execinstr
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0, // rosegment_gap
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elfcpp::SHN_UNDEF, // small_common_shndx
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elfcpp::SHN_UNDEF, // large_common_shndx
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0, // small_common_section_flags
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0, // large_common_section_flags
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NULL, // attributes_section
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NULL, // attributes_vendor
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"_start" // entry_symbol_name
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};
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template<>
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const Target::Target_info Target_aarch64<32, true>::aarch64_info =
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{
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32, // size
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true, // is_big_endian
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elfcpp::EM_AARCH64, // machine_code
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false, // has_make_symbol
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false, // has_resolve
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false, // has_code_fill
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true, // is_default_stack_executable
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false, // can_icf_inline_merge_sections
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'\0', // wrap_char
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"/lib/ld.so.1", // program interpreter
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0x400000, // default_text_segment_address
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0x1000, // abi_pagesize (overridable by -z max-page-size)
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0x1000, // common_pagesize (overridable by -z common-page-size)
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false, // isolate_execinstr
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0, // rosegment_gap
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elfcpp::SHN_UNDEF, // small_common_shndx
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elfcpp::SHN_UNDEF, // large_common_shndx
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0, // small_common_section_flags
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0, // large_common_section_flags
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NULL, // attributes_section
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NULL, // attributes_vendor
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"_start" // entry_symbol_name
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};
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// Get the GOT section, creating it if necessary.
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|
|
template<int size, bool big_endian>
|
|
Output_data_got_aarch64<size, big_endian>*
|
|
Target_aarch64<size, big_endian>::got_section(Symbol_table* symtab,
|
|
Layout* layout)
|
|
{
|
|
if (this->got_ == NULL)
|
|
{
|
|
gold_assert(symtab != NULL && layout != NULL);
|
|
|
|
// When using -z now, we can treat .got.plt as a relro section.
|
|
// Without -z now, it is modified after program startup by lazy
|
|
// PLT relocations.
|
|
bool is_got_plt_relro = parameters->options().now();
|
|
Output_section_order got_order = (is_got_plt_relro
|
|
? ORDER_RELRO
|
|
: ORDER_RELRO_LAST);
|
|
Output_section_order got_plt_order = (is_got_plt_relro
|
|
? ORDER_RELRO
|
|
: ORDER_NON_RELRO_FIRST);
|
|
|
|
// Layout of .got and .got.plt sections.
|
|
// .got[0] &_DYNAMIC <-_GLOBAL_OFFSET_TABLE_
|
|
// ...
|
|
// .gotplt[0] reserved for ld.so (&linkmap) <--DT_PLTGOT
|
|
// .gotplt[1] reserved for ld.so (resolver)
|
|
// .gotplt[2] reserved
|
|
|
|
// Generate .got section.
|
|
this->got_ = new Output_data_got_aarch64<size, big_endian>(symtab,
|
|
layout);
|
|
layout->add_output_section_data(".got", elfcpp::SHT_PROGBITS,
|
|
(elfcpp::SHF_ALLOC | elfcpp::SHF_WRITE),
|
|
this->got_, got_order, true);
|
|
// The first word of GOT is reserved for the address of .dynamic.
|
|
// We put 0 here now. The value will be replaced later in
|
|
// Output_data_got_aarch64::do_write.
|
|
this->got_->add_constant(0);
|
|
|
|
// Define _GLOBAL_OFFSET_TABLE_ at the start of the PLT.
|
|
// _GLOBAL_OFFSET_TABLE_ value points to the start of the .got section,
|
|
// even if there is a .got.plt section.
|
|
this->global_offset_table_ =
|
|
symtab->define_in_output_data("_GLOBAL_OFFSET_TABLE_", NULL,
|
|
Symbol_table::PREDEFINED,
|
|
this->got_,
|
|
0, 0, elfcpp::STT_OBJECT,
|
|
elfcpp::STB_LOCAL,
|
|
elfcpp::STV_HIDDEN, 0,
|
|
false, false);
|
|
|
|
// Generate .got.plt section.
|
|
this->got_plt_ = new Output_data_space(size / 8, "** GOT PLT");
|
|
layout->add_output_section_data(".got.plt", elfcpp::SHT_PROGBITS,
|
|
(elfcpp::SHF_ALLOC
|
|
| elfcpp::SHF_WRITE),
|
|
this->got_plt_, got_plt_order,
|
|
is_got_plt_relro);
|
|
|
|
// The first three entries are reserved.
|
|
this->got_plt_->set_current_data_size
|
|
(AARCH64_GOTPLT_RESERVE_COUNT * (size / 8));
|
|
|
|
if (!is_got_plt_relro)
|
|
{
|
|
// Those bytes can go into the relro segment.
|
|
layout->increase_relro
|
|
(AARCH64_GOTPLT_RESERVE_COUNT * (size / 8));
|
|
}
|
|
|
|
}
|
|
return this->got_;
|
|
}
|
|
|
|
// Get the dynamic reloc section, creating it if necessary.
|
|
|
|
template<int size, bool big_endian>
|
|
typename Target_aarch64<size, big_endian>::Reloc_section*
|
|
Target_aarch64<size, big_endian>::rela_dyn_section(Layout* layout)
|
|
{
|
|
if (this->rela_dyn_ == NULL)
|
|
{
|
|
gold_assert(layout != NULL);
|
|
this->rela_dyn_ = new Reloc_section(parameters->options().combreloc());
|
|
layout->add_output_section_data(".rela.dyn", elfcpp::SHT_RELA,
|
|
elfcpp::SHF_ALLOC, this->rela_dyn_,
|
|
ORDER_DYNAMIC_RELOCS, false);
|
|
}
|
|
return this->rela_dyn_;
|
|
}
|
|
|
|
// A class to handle the PLT data.
|
|
// This is an abstract base class that handles most of the linker details
|
|
// but does not know the actual contents of PLT entries. The derived
|
|
// classes below fill in those details.
|
|
|
|
template<int size, bool big_endian>
|
|
class Output_data_plt_aarch64 : public Output_section_data
|
|
{
|
|
public:
|
|
typedef Output_data_reloc<elfcpp::SHT_RELA, true, size, big_endian>
|
|
Reloc_section;
|
|
typedef typename elfcpp::Elf_types<size>::Elf_Addr Address;
|
|
|
|
Output_data_plt_aarch64(Layout* layout,
|
|
uint64_t addralign,
|
|
Output_data_space* got_plt)
|
|
: Output_section_data(addralign),
|
|
got_plt_(got_plt),
|
|
count_(0)
|
|
{ this->init(layout); }
|
|
|
|
// Initialize the PLT section.
|
|
void
|
|
init(Layout* layout);
|
|
|
|
// Add an entry to the PLT.
|
|
void
|
|
add_entry(Symbol* gsym);
|
|
|
|
// Return the .rela.plt section data.
|
|
Reloc_section*
|
|
rela_plt()
|
|
{ return this->rel_; }
|
|
|
|
// Return the number of PLT entries.
|
|
unsigned int
|
|
entry_count() const
|
|
{ return this->count_; }
|
|
|
|
// Return the offset of the first non-reserved PLT entry.
|
|
unsigned int
|
|
first_plt_entry_offset()
|
|
{ return this->do_first_plt_entry_offset(); }
|
|
|
|
// Return the size of a PLT entry.
|
|
unsigned int
|
|
get_plt_entry_size() const
|
|
{ return this->do_get_plt_entry_size(); }
|
|
|
|
protected:
|
|
// Fill in the first PLT entry.
|
|
void
|
|
fill_first_plt_entry(unsigned char* pov,
|
|
Address got_address,
|
|
Address plt_address)
|
|
{ this->do_fill_first_plt_entry(pov, got_address, plt_address); }
|
|
|
|
// Fill in a normal PLT entry.
|
|
void
|
|
fill_plt_entry(unsigned char* pov,
|
|
Address got_address,
|
|
Address plt_address,
|
|
unsigned int got_offset,
|
|
unsigned int plt_offset)
|
|
{
|
|
this->do_fill_plt_entry(pov, got_address, plt_address,
|
|
got_offset, plt_offset);
|
|
}
|
|
|
|
virtual unsigned int
|
|
do_first_plt_entry_offset() const = 0;
|
|
|
|
virtual unsigned int
|
|
do_get_plt_entry_size() const = 0;
|
|
|
|
virtual void
|
|
do_fill_first_plt_entry(unsigned char* pov,
|
|
Address got_addr,
|
|
Address plt_addr) = 0;
|
|
|
|
virtual void
|
|
do_fill_plt_entry(unsigned char* pov,
|
|
Address got_address,
|
|
Address plt_address,
|
|
unsigned int got_offset,
|
|
unsigned int plt_offset) = 0;
|
|
|
|
void
|
|
do_adjust_output_section(Output_section* os);
|
|
|
|
// Write to a map file.
|
|
void
|
|
do_print_to_mapfile(Mapfile* mapfile) const
|
|
{ mapfile->print_output_data(this, _("** PLT")); }
|
|
|
|
private:
|
|
// Set the final size.
|
|
void
|
|
set_final_data_size();
|
|
|
|
// Write out the PLT data.
|
|
void
|
|
do_write(Output_file*);
|
|
|
|
// The reloc section.
|
|
Reloc_section* rel_;
|
|
// The .got section.
|
|
Output_data_got_aarch64<size, big_endian>* got_;
|
|
// The .got.plt section.
|
|
Output_data_space* got_plt_;
|
|
// The number of PLT entries.
|
|
unsigned int count_;
|
|
};
|
|
|
|
// Initialize the PLT section.
|
|
|
|
template<int size, bool big_endian>
|
|
void
|
|
Output_data_plt_aarch64<size, big_endian>::init(Layout* layout)
|
|
{
|
|
this->rel_ = new Reloc_section(false);
|
|
layout->add_output_section_data(".rela.plt", elfcpp::SHT_RELA,
|
|
elfcpp::SHF_ALLOC, this->rel_,
|
|
ORDER_DYNAMIC_PLT_RELOCS, false);
|
|
}
|
|
|
|
template<int size, bool big_endian>
|
|
void
|
|
Output_data_plt_aarch64<size, big_endian>::do_adjust_output_section(
|
|
Output_section* os)
|
|
{
|
|
os->set_entsize(this->get_plt_entry_size());
|
|
}
|
|
|
|
// Add an entry to the PLT.
|
|
|
|
template<int size, bool big_endian>
|
|
void
|
|
Output_data_plt_aarch64<size, big_endian>::add_entry(Symbol* gsym)
|
|
{
|
|
gold_assert(!gsym->has_plt_offset());
|
|
//TODO
|
|
}
|
|
|
|
// Set the final size.
|
|
template<int size, bool big_endian>
|
|
void
|
|
Output_data_plt_aarch64<size, big_endian>::set_final_data_size()
|
|
{
|
|
this->set_data_size(this->first_plt_entry_offset()
|
|
+ this->count * this->get_plt_entry_size());
|
|
}
|
|
|
|
template<int size, bool big_endian>
|
|
class Output_data_plt_aarch64_standard :
|
|
public Output_data_plt_aarch64<size, big_endian>
|
|
{
|
|
public:
|
|
typedef typename elfcpp::Elf_types<size>::Elf_Addr Address;
|
|
Output_data_plt_aarch64_standard(Layout* layout, Output_data_space* got_plt)
|
|
: Output_data_plt_aarch64<size, big_endian>(layout,
|
|
size == 32 ? 4 : 8,
|
|
got_plt)
|
|
{ }
|
|
|
|
protected:
|
|
// Return the offset of the first non-reserved PLT entry.
|
|
virtual unsigned int
|
|
do_first_plt_entry_offset() const
|
|
{ return this->first_plt_entry_size; }
|
|
|
|
// Return the size of a PLT entry
|
|
virtual unsigned int
|
|
do_get_plt_entry_size() const
|
|
{ return this->plt_entry_size; }
|
|
|
|
virtual void
|
|
do_fill_first_plt_entry(unsigned char* pov,
|
|
Address got_address,
|
|
Address plt_address);
|
|
|
|
virtual void
|
|
do_fill_plt_entry(unsigned char* pov,
|
|
Address got_address,
|
|
Address plt_address,
|
|
unsigned int got_offset,
|
|
unsigned int plt_offset);
|
|
|
|
private:
|
|
// The size of the first plt entry size.
|
|
static const int first_plt_entry_size = 32;
|
|
// The size of the plt entry size.
|
|
static const int plt_entry_size = 16;
|
|
// Template for the first PLT entry.
|
|
static const uint32_t first_plt_entry[first_plt_entry_size / 4];
|
|
// Template for subsequent PLT entries.
|
|
static const uint32_t plt_entry[plt_entry_size / 4];
|
|
};
|
|
|
|
// The first entry in the PLT for an executable.
|
|
|
|
template<>
|
|
const uint32_t
|
|
Output_data_plt_aarch64_standard<32, false>::
|
|
first_plt_entry[first_plt_entry_size / 4] =
|
|
{
|
|
0xa9bf7bf0, /* stp x16, x30, [sp, #-16]! */
|
|
0x90000010, /* adrp x16, PLT_GOT+0x8 */
|
|
0xb9400A11, /* ldr w17, [x16, #PLT_GOT+0x8] */
|
|
0x11002210, /* add w16, w16,#PLT_GOT+0x8 */
|
|
0xd61f0220, /* br x17 */
|
|
0xd503201f, /* nop */
|
|
0xd503201f, /* nop */
|
|
0xd503201f, /* nop */
|
|
};
|
|
|
|
template<>
|
|
const uint32_t
|
|
Output_data_plt_aarch64_standard<32, true>::
|
|
first_plt_entry[first_plt_entry_size / 4] =
|
|
{
|
|
0xa9bf7bf0, /* stp x16, x30, [sp, #-16]! */
|
|
0x90000010, /* adrp x16, PLT_GOT+0x8 */
|
|
0xb9400A11, /* ldr w17, [x16, #PLT_GOT+0x8] */
|
|
0x11002210, /* add w16, w16,#PLT_GOT+0x8 */
|
|
0xd61f0220, /* br x17 */
|
|
0xd503201f, /* nop */
|
|
0xd503201f, /* nop */
|
|
0xd503201f, /* nop */
|
|
};
|
|
|
|
template<>
|
|
const uint32_t
|
|
Output_data_plt_aarch64_standard<64, false>::
|
|
first_plt_entry[first_plt_entry_size / 4] =
|
|
{
|
|
0xa9bf7bf0, /* stp x16, x30, [sp, #-16]! */
|
|
0x90000010, /* adrp x16, PLT_GOT+16 */
|
|
0xf9400A11, /* ldr x17, [x16, #PLT_GOT+0x10] */
|
|
0x91004210, /* add x16, x16,#PLT_GOT+0x10 */
|
|
0xd61f0220, /* br x17 */
|
|
0xd503201f, /* nop */
|
|
0xd503201f, /* nop */
|
|
0xd503201f, /* nop */
|
|
};
|
|
|
|
template<>
|
|
const uint32_t
|
|
Output_data_plt_aarch64_standard<64, true>::
|
|
first_plt_entry[first_plt_entry_size / 4] =
|
|
{
|
|
0xa9bf7bf0, /* stp x16, x30, [sp, #-16]! */
|
|
0x90000010, /* adrp x16, PLT_GOT+16 */
|
|
0xf9400A11, /* ldr x17, [x16, #PLT_GOT+0x10] */
|
|
0x91004210, /* add x16, x16,#PLT_GOT+0x10 */
|
|
0xd61f0220, /* br x17 */
|
|
0xd503201f, /* nop */
|
|
0xd503201f, /* nop */
|
|
0xd503201f, /* nop */
|
|
};
|
|
|
|
template<>
|
|
const uint32_t
|
|
Output_data_plt_aarch64_standard<32, false>::
|
|
plt_entry[plt_entry_size / 4] =
|
|
{
|
|
0x90000010, /* adrp x16, PLTGOT + n * 4 */
|
|
0xb9400211, /* ldr w17, [w16, PLTGOT + n * 4] */
|
|
0x11000210, /* add w16, w16, :lo12:PLTGOT + n * 4 */
|
|
0xd61f0220, /* br x17. */
|
|
};
|
|
|
|
template<>
|
|
const uint32_t
|
|
Output_data_plt_aarch64_standard<32, true>::
|
|
plt_entry[plt_entry_size / 4] =
|
|
{
|
|
0x90000010, /* adrp x16, PLTGOT + n * 4 */
|
|
0xb9400211, /* ldr w17, [w16, PLTGOT + n * 4] */
|
|
0x11000210, /* add w16, w16, :lo12:PLTGOT + n * 4 */
|
|
0xd61f0220, /* br x17. */
|
|
};
|
|
|
|
template<>
|
|
const uint32_t
|
|
Output_data_plt_aarch64_standard<64, false>::
|
|
plt_entry[plt_entry_size / 4] =
|
|
{
|
|
0x90000010, /* adrp x16, PLTGOT + n * 8 */
|
|
0xf9400211, /* ldr x17, [x16, PLTGOT + n * 8] */
|
|
0x91000210, /* add x16, x16, :lo12:PLTGOT + n * 8 */
|
|
0xd61f0220, /* br x17. */
|
|
};
|
|
|
|
template<>
|
|
const uint32_t
|
|
Output_data_plt_aarch64_standard<64, true>::
|
|
plt_entry[plt_entry_size / 4] =
|
|
{
|
|
0x90000010, /* adrp x16, PLTGOT + n * 8 */
|
|
0xf9400211, /* ldr x17, [x16, PLTGOT + n * 8] */
|
|
0x91000210, /* add x16, x16, :lo12:PLTGOT + n * 8 */
|
|
0xd61f0220, /* br x17. */
|
|
};
|
|
|
|
template<int size, bool big_endian>
|
|
void
|
|
Output_data_plt_aarch64_standard<size, big_endian>::do_fill_first_plt_entry(
|
|
unsigned char* pov,
|
|
Address /* got_address */,
|
|
Address /* plt_address */)
|
|
{
|
|
// PLT0 of the small PLT looks like this in ELF64 -
|
|
// stp x16, x30, [sp, #-16]! Save the reloc and lr on stack.
|
|
// adrp x16, PLT_GOT + 16 Get the page base of the GOTPLT
|
|
// ldr x17, [x16, #:lo12:PLT_GOT+16] Load the address of the
|
|
// symbol resolver
|
|
// add x16, x16, #:lo12:PLT_GOT+16 Load the lo12 bits of the
|
|
// GOTPLT entry for this.
|
|
// br x17
|
|
// PLT0 will be slightly different in ELF32 due to different got entry
|
|
// size.
|
|
memcpy(pov, this->first_plt_entry, this->first_plt_entry_size);
|
|
// TODO
|
|
}
|
|
|
|
// Subsequent entries in the PLT for an executable.
|
|
|
|
template<int size, bool big_endian>
|
|
void
|
|
Output_data_plt_aarch64_standard<size, big_endian>::do_fill_plt_entry(
|
|
unsigned char* pov,
|
|
Address /* got_address*/,
|
|
Address /* plt_address */,
|
|
unsigned int /* got_offset */,
|
|
unsigned int /* plt_offset */)
|
|
{
|
|
memcpy(pov, this->plt_entry, this->plt_entry_size);
|
|
//TODO
|
|
}
|
|
|
|
// Write out the PLT. This uses the hand-coded instructions above,
|
|
// and adjusts them as needed. This is specified by the AMD64 ABI.
|
|
|
|
template<int size, bool big_endian>
|
|
void
|
|
Output_data_plt_aarch64<size, big_endian>::do_write(Output_file* of)
|
|
{
|
|
const off_t offset = this->offset();
|
|
const section_size_type oview_size =
|
|
convert_to_section_size_type(this->data_size());
|
|
unsigned char* const oview = of->get_output_view(offset, oview_size);
|
|
|
|
const off_t got_file_offset = this->got_plt_->offset();
|
|
const section_size_type got_size =
|
|
convert_to_section_size_type(this->got_plt_->data_size());
|
|
unsigned char* const got_view = of->get_output_view(got_file_offset,
|
|
got_size);
|
|
|
|
unsigned char* pov = oview;
|
|
|
|
// The base address of the .plt section.
|
|
typename elfcpp::Elf_types<size>::Elf_Addr plt_address = this->address();
|
|
// The base address of the .got section.
|
|
typename elfcpp::Elf_types<size>::Elf_Addr got_base = this->got_->address();
|
|
// The base address of the PLT portion of the .got section.
|
|
typename elfcpp::Elf_types<size>::Elf_Addr got_address
|
|
= this->got_plt_->address();
|
|
|
|
this->fill_first_plt_entry(pov, got_address, plt_address);
|
|
pov += this->first_plt_entry_offset();
|
|
|
|
// The first three entries in .got.plt are reserved.
|
|
unsigned char* got_pov = got_view;
|
|
memset(got_pov, 0, size / 8 * AARCH64_GOTPLT_RESERVE_COUNT);
|
|
got_pov += (size / 8) * AARCH64_GOTPLT_RESERVE_COUNT;
|
|
|
|
unsigned int plt_offset = this->first_plt_entry_offset();
|
|
unsigned int got_offset = (size / 8) * AARCH64_GOTPLT_RESERVE_COUNT;
|
|
const unsigned int count = this->count_;
|
|
for (unsigned int plt_index = 0;
|
|
plt_index < count;
|
|
++plt_index,
|
|
pov += this->get_plt_entry_size(),
|
|
got_pov += size / 8,
|
|
plt_offset += this->get_plt_entry_size(),
|
|
got_offset += size / 8)
|
|
{
|
|
// Set and adjust the PLT entry itself.
|
|
this->fill_plt_entry(pov, got_address, plt_address,
|
|
got_offset, plt_offset);
|
|
|
|
// Set the entry in the GOT.
|
|
elfcpp::Swap<size, big_endian>::writeval(got_pov,
|
|
plt_address + plt_offset);
|
|
}
|
|
|
|
gold_assert(static_cast<section_size_type>(pov - oview) == oview_size);
|
|
gold_assert(static_cast<section_size_type>(got_pov - got_view) == got_size);
|
|
|
|
of->write_output_view(offset, oview_size, oview);
|
|
of->write_output_view(got_file_offset, got_size, got_view);
|
|
}
|
|
|
|
// Return the number of entries in the PLT.
|
|
|
|
template<int size, bool big_endian>
|
|
unsigned int
|
|
Target_aarch64<size, big_endian>::plt_entry_count() const
|
|
{
|
|
if (this->plt_ == NULL)
|
|
return 0;
|
|
return this->plt_->entry_count();
|
|
}
|
|
|
|
// Return the offset of the first non-reserved PLT entry.
|
|
|
|
template<int size, bool big_endian>
|
|
unsigned int
|
|
Target_aarch64<size, big_endian>::first_plt_entry_offset() const
|
|
{
|
|
return this->plt_->first_plt_entry_offset();
|
|
}
|
|
|
|
// Return the size of each PLT entry.
|
|
|
|
template<int size, bool big_endian>
|
|
unsigned int
|
|
Target_aarch64<size, big_endian>::plt_entry_size() const
|
|
{
|
|
return this->plt_->get_plt_entry_size();
|
|
}
|
|
|
|
// Optimize the TLS relocation type based on what we know about the
|
|
// symbol. IS_FINAL is true if the final address of this symbol is
|
|
// known at link time.
|
|
|
|
template<int size, bool big_endian>
|
|
tls::Tls_optimization
|
|
Target_aarch64<size, big_endian>::optimize_tls_reloc(bool /* is_final */,
|
|
int /* r_type */)
|
|
{
|
|
//TODO
|
|
return tls::TLSOPT_NONE;
|
|
}
|
|
|
|
// Get the Reference_flags for a particular relocation.
|
|
template<int size, bool big_endian>
|
|
int
|
|
Target_aarch64<size, big_endian>::Scan::get_reference_flags(unsigned int r_type)
|
|
{
|
|
switch (r_type)
|
|
{
|
|
case elfcpp::R_AARCH64_NONE:
|
|
// No symbol reference.
|
|
return 0;
|
|
//TODO
|
|
default:
|
|
// Not expected. We will give an error later.
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
// Returns true if this relocation type could be that of a function pointer.
|
|
|
|
template<int size, bool big_endian>
|
|
inline bool
|
|
Target_aarch64<size, big_endian>::Scan::possible_function_pointer_reloc(
|
|
unsigned int r_type)
|
|
{
|
|
switch (r_type)
|
|
{
|
|
case elfcpp::R_AARCH64_ABS64:
|
|
//TODO
|
|
{
|
|
return true;
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
|
|
// For safe ICF, scan a relocation for a local symbol to check if it
|
|
// corresponds to a function pointer being taken. In that case mark
|
|
// the function whose pointer was taken as not foldable.
|
|
|
|
template<int size, bool big_endian>
|
|
inline bool
|
|
Target_aarch64<size, big_endian>::Scan::local_reloc_may_be_function_pointer(
|
|
Symbol_table* ,
|
|
Layout* ,
|
|
Target_aarch64<size, big_endian>* ,
|
|
Sized_relobj_file<size, big_endian>* ,
|
|
unsigned int ,
|
|
Output_section* ,
|
|
const elfcpp::Rela<size, big_endian>& ,
|
|
unsigned int r_type,
|
|
const elfcpp::Sym<size, big_endian>&)
|
|
{
|
|
// When building a shared library, do not fold any local symbols as it is
|
|
// not possible to distinguish pointer taken versus a call by looking at
|
|
// the relocation types.
|
|
return (parameters->options().shared()
|
|
|| possible_function_pointer_reloc(r_type));
|
|
}
|
|
|
|
// For safe ICF, scan a relocation for a global symbol to check if it
|
|
// corresponds to a function pointer being taken. In that case mark
|
|
// the function whose pointer was taken as not foldable.
|
|
|
|
template<int size, bool big_endian>
|
|
inline bool
|
|
Target_aarch64<size, big_endian>::Scan::global_reloc_may_be_function_pointer(
|
|
Symbol_table* ,
|
|
Layout* ,
|
|
Target_aarch64<size, big_endian>* ,
|
|
Sized_relobj_file<size, big_endian>* ,
|
|
unsigned int ,
|
|
Output_section* ,
|
|
const elfcpp::Rela<size, big_endian>& ,
|
|
unsigned int r_type,
|
|
Symbol* gsym)
|
|
{
|
|
// When building a shared library, do not fold symbols whose visibility
|
|
// is hidden, internal or protected.
|
|
return ((parameters->options().shared()
|
|
&& (gsym->visibility() == elfcpp::STV_INTERNAL
|
|
|| gsym->visibility() == elfcpp::STV_PROTECTED
|
|
|| gsym->visibility() == elfcpp::STV_HIDDEN))
|
|
|| possible_function_pointer_reloc(r_type));
|
|
}
|
|
|
|
// Report an unsupported relocation against a local symbol.
|
|
|
|
template<int size, bool big_endian>
|
|
void
|
|
Target_aarch64<size, big_endian>::Scan::unsupported_reloc_local(
|
|
Sized_relobj_file<size, big_endian>* object,
|
|
unsigned int r_type)
|
|
{
|
|
gold_error(_("%s: unsupported reloc %u against local symbol"),
|
|
object->name().c_str(), r_type);
|
|
}
|
|
|
|
// We are about to emit a dynamic relocation of type R_TYPE. If the
|
|
// dynamic linker does not support it, issue an error.
|
|
|
|
template<int size, bool big_endian>
|
|
void
|
|
Target_aarch64<size, big_endian>::Scan::check_non_pic(Relobj* object,
|
|
unsigned int r_type)
|
|
{
|
|
gold_assert(r_type != elfcpp::R_AARCH64_NONE);
|
|
|
|
switch (r_type)
|
|
{
|
|
// These are the relocation types supported by glibc for AARCH64.
|
|
case elfcpp::R_AARCH64_NONE:
|
|
case elfcpp::R_AARCH64_COPY:
|
|
case elfcpp::R_AARCH64_GLOB_DAT:
|
|
case elfcpp::R_AARCH64_JUMP_SLOT:
|
|
case elfcpp::R_AARCH64_RELATIVE:
|
|
case elfcpp::R_AARCH64_TLS_DTPREL64:
|
|
case elfcpp::R_AARCH64_TLS_DTPMOD64:
|
|
case elfcpp::R_AARCH64_TLS_TPREL64:
|
|
case elfcpp::R_AARCH64_TLSDESC:
|
|
case elfcpp::R_AARCH64_IRELATIVE:
|
|
case elfcpp::R_AARCH64_ABS32:
|
|
case elfcpp::R_AARCH64_ABS64:
|
|
return;
|
|
|
|
default:
|
|
break;
|
|
}
|
|
|
|
// This prevents us from issuing more than one error per reloc
|
|
// section. But we can still wind up issuing more than one
|
|
// error per object file.
|
|
if (this->issued_non_pic_error_)
|
|
return;
|
|
gold_assert(parameters->options().output_is_position_independent());
|
|
object->error(_("requires unsupported dynamic reloc; "
|
|
"recompile with -fPIC"));
|
|
this->issued_non_pic_error_ = true;
|
|
return;
|
|
}
|
|
|
|
// Scan a relocation for a local symbol.
|
|
|
|
template<int size, bool big_endian>
|
|
inline void
|
|
Target_aarch64<size, big_endian>::Scan::local(
|
|
Symbol_table* /* symtab */,
|
|
Layout* /* layout */,
|
|
Target_aarch64<size, big_endian>* /* target */,
|
|
Sized_relobj_file<size, big_endian>* /* object */,
|
|
unsigned int /* data_shndx */,
|
|
Output_section* /* output_section */,
|
|
const elfcpp::Rela<size, big_endian>& /* reloc */,
|
|
unsigned int r_type,
|
|
const elfcpp::Sym<size, big_endian>& /* lsym */,
|
|
bool is_discarded)
|
|
{
|
|
if (is_discarded)
|
|
return;
|
|
|
|
switch (r_type)
|
|
{
|
|
case elfcpp::R_AARCH64_NONE:
|
|
break;
|
|
|
|
//TODO
|
|
}
|
|
}
|
|
|
|
|
|
// Report an unsupported relocation against a global symbol.
|
|
|
|
template<int size, bool big_endian>
|
|
void
|
|
Target_aarch64<size, big_endian>::Scan::unsupported_reloc_global(
|
|
Sized_relobj_file<size, big_endian>* object,
|
|
unsigned int r_type,
|
|
Symbol* gsym)
|
|
{
|
|
gold_error(_("%s: unsupported reloc %u against global symbol %s"),
|
|
object->name().c_str(), r_type, gsym->demangled_name().c_str());
|
|
}
|
|
|
|
template<int size, bool big_endian>
|
|
inline void
|
|
Target_aarch64<size, big_endian>::Scan::global(
|
|
Symbol_table* /* symtab */,
|
|
Layout* /* layout */,
|
|
Target_aarch64<size, big_endian>* /* target */,
|
|
Sized_relobj_file<size, big_endian>* /* object */,
|
|
unsigned int /* data_shndx */,
|
|
Output_section* /* output_section */,
|
|
const elfcpp::Rela<size, big_endian>& /* reloc */,
|
|
unsigned int /* r_type */,
|
|
Symbol* /* gsym */)
|
|
{
|
|
//TODO
|
|
return;
|
|
}
|
|
|
|
template<int size, bool big_endian>
|
|
void
|
|
Target_aarch64<size, big_endian>::gc_process_relocs(
|
|
Symbol_table* symtab,
|
|
Layout* layout,
|
|
Sized_relobj_file<size, big_endian>* object,
|
|
unsigned int data_shndx,
|
|
unsigned int sh_type,
|
|
const unsigned char* prelocs,
|
|
size_t reloc_count,
|
|
Output_section* output_section,
|
|
bool needs_special_offset_handling,
|
|
size_t local_symbol_count,
|
|
const unsigned char* plocal_symbols)
|
|
{
|
|
if (sh_type == elfcpp::SHT_REL)
|
|
{
|
|
return;
|
|
}
|
|
|
|
gold::gc_process_relocs<size, big_endian,
|
|
Target_aarch64<size, big_endian>,
|
|
elfcpp::SHT_RELA,
|
|
typename Target_aarch64<size, big_endian>::Scan,
|
|
typename Target_aarch64<size, big_endian>::Relocatable_size_for_reloc>(
|
|
symtab,
|
|
layout,
|
|
this,
|
|
object,
|
|
data_shndx,
|
|
prelocs,
|
|
reloc_count,
|
|
output_section,
|
|
needs_special_offset_handling,
|
|
local_symbol_count,
|
|
plocal_symbols);
|
|
}
|
|
|
|
// Scan relocations for a section.
|
|
|
|
template<int size, bool big_endian>
|
|
void
|
|
Target_aarch64<size, big_endian>::scan_relocs(
|
|
Symbol_table* symtab,
|
|
Layout* layout,
|
|
Sized_relobj_file<size, big_endian>* object,
|
|
unsigned int data_shndx,
|
|
unsigned int sh_type,
|
|
const unsigned char* prelocs,
|
|
size_t reloc_count,
|
|
Output_section* output_section,
|
|
bool needs_special_offset_handling,
|
|
size_t local_symbol_count,
|
|
const unsigned char* plocal_symbols)
|
|
{
|
|
if (sh_type == elfcpp::SHT_REL)
|
|
{
|
|
gold_error(_("%s: unsupported REL reloc section"),
|
|
object->name().c_str());
|
|
return;
|
|
}
|
|
|
|
gold::scan_relocs<size, big_endian, Target_aarch64<size, big_endian>,
|
|
elfcpp::SHT_RELA,
|
|
typename Target_aarch64<size, big_endian>::Scan>(
|
|
symtab,
|
|
layout,
|
|
this,
|
|
object,
|
|
data_shndx,
|
|
prelocs,
|
|
reloc_count,
|
|
output_section,
|
|
needs_special_offset_handling,
|
|
local_symbol_count,
|
|
plocal_symbols);
|
|
}
|
|
|
|
// Finalize the sections.
|
|
|
|
template<int size, bool big_endian>
|
|
void
|
|
Target_aarch64<size, big_endian>::do_finalize_sections(
|
|
Layout* /* layout */,
|
|
const Input_objects*,
|
|
Symbol_table* /* symtab */)
|
|
{
|
|
//TODO
|
|
return;
|
|
}
|
|
|
|
// Perform a relocation.
|
|
|
|
template<int size, bool big_endian>
|
|
inline bool
|
|
Target_aarch64<size, big_endian>::Relocate::relocate(
|
|
const Relocate_info<size, big_endian>* /* relinfo */,
|
|
Target_aarch64<size, big_endian>* /* target */,
|
|
Output_section* ,
|
|
size_t /* relnum */,
|
|
const elfcpp::Rela<size, big_endian>& /* rela */,
|
|
unsigned int /* r_type */,
|
|
const Sized_symbol<size>* /* gsym */,
|
|
const Symbol_value<size>* /* psymval */,
|
|
unsigned char* /* view */,
|
|
typename elfcpp::Elf_types<size>::Elf_Addr /* address */,
|
|
section_size_type /* view_size */)
|
|
{
|
|
//TODO
|
|
return true;
|
|
}
|
|
|
|
// Relocate section data.
|
|
|
|
template<int size, bool big_endian>
|
|
void
|
|
Target_aarch64<size, big_endian>::relocate_section(
|
|
const Relocate_info<size, big_endian>* /* relinfo */,
|
|
unsigned int sh_type,
|
|
const unsigned char* /* prelocs */,
|
|
size_t /* reloc_count */,
|
|
Output_section* /* output_section */,
|
|
bool /*needs_special_offset_handling */,
|
|
unsigned char* /* view */,
|
|
typename elfcpp::Elf_types<size>::Elf_Addr /* address */,
|
|
section_size_type /* view_size */,
|
|
const Reloc_symbol_changes* /* reloc_symbol_changes */)
|
|
{
|
|
//TODO
|
|
gold_assert(sh_type == elfcpp::SHT_RELA);
|
|
}
|
|
|
|
// Return the size of a relocation while scanning during a relocatable
|
|
// link.
|
|
|
|
template<int size, bool big_endian>
|
|
unsigned int
|
|
Target_aarch64<size, big_endian>::Relocatable_size_for_reloc::
|
|
get_size_for_reloc(
|
|
unsigned int ,
|
|
Relobj* )
|
|
{
|
|
// We will never support SHT_REL relocations.
|
|
gold_unreachable();
|
|
return 0;
|
|
}
|
|
|
|
// Scan the relocs during a relocatable link.
|
|
|
|
template<int size, bool big_endian>
|
|
void
|
|
Target_aarch64<size, big_endian>::scan_relocatable_relocs(
|
|
Symbol_table* /* symtab */,
|
|
Layout* /* layout */,
|
|
Sized_relobj_file<size, big_endian>* /* object */,
|
|
unsigned int /* data_shndx */,
|
|
unsigned int sh_type,
|
|
const unsigned char* /* prelocs */,
|
|
size_t /* reloc_count */,
|
|
Output_section* /* output_section */,
|
|
bool /* needs_special_offset_handling */,
|
|
size_t /* local_symbol_count */,
|
|
const unsigned char* /* plocal_symbols */,
|
|
Relocatable_relocs* /* rr */)
|
|
{
|
|
//TODO
|
|
gold_assert(sh_type == elfcpp::SHT_RELA);
|
|
}
|
|
|
|
// Relocate a section during a relocatable link.
|
|
|
|
template<int size, bool big_endian>
|
|
void
|
|
Target_aarch64<size, big_endian>::relocate_relocs(
|
|
const Relocate_info<size, big_endian>* /* relinfo */,
|
|
unsigned int sh_type,
|
|
const unsigned char* /* prelocs */,
|
|
size_t /* reloc_count */,
|
|
Output_section* /* output_section */,
|
|
typename elfcpp::Elf_types<size>::Elf_Off /* offset_in_output_section */,
|
|
const Relocatable_relocs* /* rr */,
|
|
unsigned char* /* view */,
|
|
typename elfcpp::Elf_types<size>::Elf_Addr /* view_address */,
|
|
section_size_type /* view_size */,
|
|
unsigned char* /* reloc_view */,
|
|
section_size_type /* reloc_view_size */)
|
|
{
|
|
//TODO
|
|
gold_assert(sh_type == elfcpp::SHT_RELA);
|
|
}
|
|
|
|
|
|
// The selector for aarch64 object files.
|
|
|
|
template<int size, bool big_endian>
|
|
class Target_selector_aarch64 : public Target_selector
|
|
{
|
|
public:
|
|
Target_selector_aarch64()
|
|
: Target_selector(elfcpp::EM_AARCH64, size, big_endian,
|
|
(size == 64
|
|
? (big_endian ? "elf64-bigaarch64"
|
|
: "elf64-littleaarch64")
|
|
: (big_endian ? "elf32-bigaarch64"
|
|
: "elf32-littleaarch64")),
|
|
(size == 64
|
|
? (big_endian ? "aarch64_elf64_be_vec"
|
|
: "aarch64_elf64_le_vec")
|
|
: (big_endian ? "aarch64_elf32_be_vec"
|
|
: "aarch64_elf32_le_vec")))
|
|
{ }
|
|
|
|
virtual Target*
|
|
do_instantiate_target()
|
|
{ return new Target_aarch64<size, big_endian>(); }
|
|
};
|
|
|
|
Target_selector_aarch64<32, true> target_selector_aarch64elf32b;
|
|
Target_selector_aarch64<32, false> target_selector_aarch64elf32;
|
|
Target_selector_aarch64<64, true> target_selector_aarch64elfb;
|
|
Target_selector_aarch64<64, false> target_selector_aarch64elf;
|
|
|
|
|
|
} // End anonymous namespace.
|