| Line 1... |
Line 1... |
// x86_64.cc -- x86_64 target support for gold.
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// x86_64.cc -- x86_64 target support for gold.
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// Copyright 2006, 2007, 2008, 2009, 2010, 2011 Free Software Foundation, Inc.
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// Copyright 2006, 2007, 2008, 2009, 2010, 2011, 2012
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// Free Software Foundation, Inc.
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// Written by Ian Lance Taylor <iant@google.com>.
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// Written by Ian Lance Taylor <iant@google.com>.
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// This file is part of gold.
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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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// This program is free software; you can redistribute it and/or modify
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| Line 47... |
Line 48... |
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using namespace gold;
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using namespace gold;
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// A class to handle the PLT data.
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// A class to handle the PLT data.
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template<int size>
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class Output_data_plt_x86_64 : public Output_section_data
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class Output_data_plt_x86_64 : public Output_section_data
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{
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{
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public:
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public:
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typedef Output_data_reloc<elfcpp::SHT_RELA, true, 64, false> Reloc_section;
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typedef Output_data_reloc<elfcpp::SHT_RELA, true, size, false> Reloc_section;
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Output_data_plt_x86_64(Layout* layout, Output_data_got<64, false>* got,
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Output_data_plt_x86_64(Layout* layout, Output_data_got<64, false>* got,
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Output_data_space* got_plt,
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Output_data_space* got_plt,
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Output_data_space* got_irelative)
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Output_data_space* got_irelative)
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: Output_section_data(16), layout_(layout), tlsdesc_rel_(NULL),
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: Output_section_data(16), layout_(layout), tlsdesc_rel_(NULL),
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| Line 88... |
Line 90... |
add_entry(Symbol_table*, Layout*, Symbol* gsym);
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add_entry(Symbol_table*, Layout*, Symbol* gsym);
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// Add an entry to the PLT for a local STT_GNU_IFUNC symbol.
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// Add an entry to the PLT for a local STT_GNU_IFUNC symbol.
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unsigned int
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unsigned int
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add_local_ifunc_entry(Symbol_table* symtab, Layout*,
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add_local_ifunc_entry(Symbol_table* symtab, Layout*,
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Sized_relobj_file<64, false>* relobj,
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Sized_relobj_file<size, false>* relobj,
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unsigned int local_sym_index);
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unsigned int local_sym_index);
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// Add the relocation for a PLT entry.
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// Add the relocation for a PLT entry.
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void
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void
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add_relocation(Symbol_table*, Layout*, Symbol* gsym,
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add_relocation(Symbol_table*, Layout*, Symbol* gsym,
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| Line 240... |
Line 242... |
// http://www.x86-64.org/documentation/abi.pdf
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// http://www.x86-64.org/documentation/abi.pdf
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// TLS info comes from
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// TLS info comes from
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// http://people.redhat.com/drepper/tls.pdf
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// http://people.redhat.com/drepper/tls.pdf
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// http://www.lsd.ic.unicamp.br/~oliva/writeups/TLS/RFC-TLSDESC-x86.txt
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// http://www.lsd.ic.unicamp.br/~oliva/writeups/TLS/RFC-TLSDESC-x86.txt
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class Target_x86_64 : public Sized_target<64, false>
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template<int size>
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class Target_x86_64 : public Sized_target<size, false>
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{
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{
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public:
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public:
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// In the x86_64 ABI (p 68), it says "The AMD64 ABI architectures
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// In the x86_64 ABI (p 68), it says "The AMD64 ABI architectures
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// uses only Elf64_Rela relocation entries with explicit addends."
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// uses only Elf64_Rela relocation entries with explicit addends."
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typedef Output_data_reloc<elfcpp::SHT_RELA, true, 64, false> Reloc_section;
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typedef Output_data_reloc<elfcpp::SHT_RELA, true, size, false> Reloc_section;
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Target_x86_64()
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Target_x86_64()
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: Sized_target<64, false>(&x86_64_info),
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: Sized_target<size, false>(&x86_64_info),
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got_(NULL), plt_(NULL), got_plt_(NULL), got_irelative_(NULL),
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got_(NULL), plt_(NULL), got_plt_(NULL), got_irelative_(NULL),
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got_tlsdesc_(NULL), global_offset_table_(NULL), rela_dyn_(NULL),
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got_tlsdesc_(NULL), global_offset_table_(NULL), rela_dyn_(NULL),
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rela_irelative_(NULL), copy_relocs_(elfcpp::R_X86_64_COPY),
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rela_irelative_(NULL), copy_relocs_(elfcpp::R_X86_64_COPY),
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dynbss_(NULL), got_mod_index_offset_(-1U), tlsdesc_reloc_info_(),
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dynbss_(NULL), got_mod_index_offset_(-1U), tlsdesc_reloc_info_(),
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tls_base_symbol_defined_(false)
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tls_base_symbol_defined_(false)
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| Line 264... |
Line 267... |
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// Scan the relocations to look for symbol adjustments.
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// Scan the relocations to look for symbol adjustments.
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void
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void
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gc_process_relocs(Symbol_table* symtab,
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gc_process_relocs(Symbol_table* symtab,
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Layout* layout,
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Layout* layout,
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Sized_relobj_file<64, false>* object,
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Sized_relobj_file<size, false>* object,
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unsigned int data_shndx,
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unsigned int data_shndx,
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unsigned int sh_type,
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unsigned int sh_type,
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const unsigned char* prelocs,
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const unsigned char* prelocs,
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size_t reloc_count,
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size_t reloc_count,
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Output_section* output_section,
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Output_section* output_section,
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| Line 278... |
Line 281... |
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// Scan the relocations to look for symbol adjustments.
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// Scan the relocations to look for symbol adjustments.
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void
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void
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scan_relocs(Symbol_table* symtab,
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scan_relocs(Symbol_table* symtab,
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Layout* layout,
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Layout* layout,
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Sized_relobj_file<64, false>* object,
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Sized_relobj_file<size, false>* object,
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unsigned int data_shndx,
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unsigned int data_shndx,
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unsigned int sh_type,
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unsigned int sh_type,
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const unsigned char* prelocs,
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const unsigned char* prelocs,
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size_t reloc_count,
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size_t reloc_count,
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Output_section* output_section,
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Output_section* output_section,
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| Line 299... |
Line 302... |
uint64_t
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uint64_t
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do_dynsym_value(const Symbol*) const;
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do_dynsym_value(const Symbol*) const;
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// Relocate a section.
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// Relocate a section.
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void
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void
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relocate_section(const Relocate_info<64, false>*,
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relocate_section(const Relocate_info<size, false>*,
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unsigned int sh_type,
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unsigned int sh_type,
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const unsigned char* prelocs,
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const unsigned char* prelocs,
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size_t reloc_count,
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size_t reloc_count,
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Output_section* output_section,
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Output_section* output_section,
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bool needs_special_offset_handling,
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bool needs_special_offset_handling,
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unsigned char* view,
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unsigned char* view,
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elfcpp::Elf_types<64>::Elf_Addr view_address,
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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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section_size_type view_size,
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const Reloc_symbol_changes*);
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const Reloc_symbol_changes*);
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// Scan the relocs during a relocatable link.
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// Scan the relocs during a relocatable link.
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void
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void
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scan_relocatable_relocs(Symbol_table* symtab,
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scan_relocatable_relocs(Symbol_table* symtab,
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Layout* layout,
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Layout* layout,
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Sized_relobj_file<64, false>* object,
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Sized_relobj_file<size, false>* object,
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unsigned int data_shndx,
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unsigned int data_shndx,
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unsigned int sh_type,
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unsigned int sh_type,
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const unsigned char* prelocs,
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const unsigned char* prelocs,
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size_t reloc_count,
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size_t reloc_count,
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Output_section* output_section,
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Output_section* output_section,
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| Line 327... |
Line 330... |
const unsigned char* plocal_symbols,
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const unsigned char* plocal_symbols,
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Relocatable_relocs*);
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Relocatable_relocs*);
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// Relocate a section during a relocatable link.
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// Relocate a section during a relocatable link.
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void
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void
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relocate_for_relocatable(const Relocate_info<64, false>*,
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relocate_for_relocatable(
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const Relocate_info<size, false>*,
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unsigned int sh_type,
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unsigned int sh_type,
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const unsigned char* prelocs,
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const unsigned char* prelocs,
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size_t reloc_count,
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size_t reloc_count,
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Output_section* output_section,
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Output_section* output_section,
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off_t offset_in_output_section,
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off_t offset_in_output_section,
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const Relocatable_relocs*,
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const Relocatable_relocs*,
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unsigned char* view,
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unsigned char* view,
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elfcpp::Elf_types<64>::Elf_Addr view_address,
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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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section_size_type view_size,
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unsigned char* reloc_view,
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unsigned char* reloc_view,
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section_size_type reloc_view_size);
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section_size_type reloc_view_size);
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// Return a string used to fill a code section with nops.
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// Return a string used to fill a code section with nops.
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| Line 423... |
Line 427... |
// Return the size of each PLT entry.
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// Return the size of each PLT entry.
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unsigned int
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unsigned int
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plt_entry_size() const;
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plt_entry_size() const;
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// Create the GOT section for an incremental update.
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// Create the GOT section for an incremental update.
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Output_data_got<64, false>*
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Output_data_got_base*
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init_got_plt_for_update(Symbol_table* symtab,
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init_got_plt_for_update(Symbol_table* symtab,
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Layout* layout,
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Layout* layout,
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unsigned int got_count,
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unsigned int got_count,
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unsigned int plt_count);
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unsigned int plt_count);
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// Reserve a GOT entry for a local symbol, and regenerate any
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// Reserve a GOT entry for a local symbol, and regenerate any
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// necessary dynamic relocations.
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// necessary dynamic relocations.
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void
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void
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reserve_local_got_entry(unsigned int got_index,
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reserve_local_got_entry(unsigned int got_index,
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Sized_relobj<64, false>* obj,
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Sized_relobj<size, false>* obj,
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unsigned int r_sym,
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unsigned int r_sym,
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unsigned int got_type);
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unsigned int got_type);
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// Reserve a GOT entry for a global symbol, and regenerate any
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// Reserve a GOT entry for a global symbol, and regenerate any
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// necessary dynamic relocations.
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// necessary dynamic relocations.
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| Line 454... |
Line 458... |
void
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void
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emit_copy_reloc(Symbol_table*, Symbol*, Output_section*, off_t);
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emit_copy_reloc(Symbol_table*, Symbol*, Output_section*, off_t);
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// Apply an incremental relocation.
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// Apply an incremental relocation.
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void
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void
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apply_relocation(const Relocate_info<64, false>* relinfo,
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apply_relocation(const Relocate_info<size, false>* relinfo,
|
elfcpp::Elf_types<64>::Elf_Addr r_offset,
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typename elfcpp::Elf_types<size>::Elf_Addr r_offset,
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unsigned int r_type,
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unsigned int r_type,
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elfcpp::Elf_types<64>::Elf_Swxword r_addend,
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typename elfcpp::Elf_types<size>::Elf_Swxword r_addend,
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const Symbol* gsym,
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const Symbol* gsym,
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unsigned char* view,
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unsigned char* view,
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elfcpp::Elf_types<64>::Elf_Addr address,
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typename elfcpp::Elf_types<size>::Elf_Addr address,
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section_size_type view_size);
|
section_size_type view_size);
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// Add a new reloc argument, returning the index in the vector.
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// Add a new reloc argument, returning the index in the vector.
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size_t
|
size_t
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add_tlsdesc_info(Sized_relobj_file<64, false>* object, unsigned int r_sym)
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add_tlsdesc_info(Sized_relobj_file<size, false>* object, unsigned int r_sym)
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{
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{
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this->tlsdesc_reloc_info_.push_back(Tlsdesc_info(object, r_sym));
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this->tlsdesc_reloc_info_.push_back(Tlsdesc_info(object, r_sym));
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return this->tlsdesc_reloc_info_.size() - 1;
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return this->tlsdesc_reloc_info_.size() - 1;
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}
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}
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| Line 485... |
Line 489... |
static inline int
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static inline int
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get_reference_flags(unsigned int r_type);
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get_reference_flags(unsigned int r_type);
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|
|
inline void
|
inline void
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local(Symbol_table* symtab, Layout* layout, Target_x86_64* target,
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local(Symbol_table* symtab, Layout* layout, Target_x86_64* target,
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Sized_relobj_file<64, false>* object,
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Sized_relobj_file<size, false>* object,
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unsigned int data_shndx,
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unsigned int data_shndx,
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Output_section* output_section,
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Output_section* output_section,
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const elfcpp::Rela<64, false>& reloc, unsigned int r_type,
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const elfcpp::Rela<size, false>& reloc, unsigned int r_type,
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const elfcpp::Sym<64, false>& lsym);
|
const elfcpp::Sym<size, false>& lsym);
|
|
|
inline void
|
inline void
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global(Symbol_table* symtab, Layout* layout, Target_x86_64* target,
|
global(Symbol_table* symtab, Layout* layout, Target_x86_64* target,
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Sized_relobj_file<64, false>* object,
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Sized_relobj_file<size, false>* object,
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unsigned int data_shndx,
|
unsigned int data_shndx,
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Output_section* output_section,
|
Output_section* output_section,
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const elfcpp::Rela<64, false>& reloc, unsigned int r_type,
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const elfcpp::Rela<size, false>& reloc, unsigned int r_type,
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Symbol* gsym);
|
Symbol* gsym);
|
|
|
inline bool
|
inline bool
|
local_reloc_may_be_function_pointer(Symbol_table* symtab, Layout* layout,
|
local_reloc_may_be_function_pointer(Symbol_table* symtab, Layout* layout,
|
Target_x86_64* target,
|
Target_x86_64* target,
|
Sized_relobj_file<64, false>* object,
|
Sized_relobj_file<size, false>* object,
|
unsigned int data_shndx,
|
unsigned int data_shndx,
|
Output_section* output_section,
|
Output_section* output_section,
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const elfcpp::Rela<64, false>& reloc,
|
const elfcpp::Rela<size, false>& reloc,
|
unsigned int r_type,
|
unsigned int r_type,
|
const elfcpp::Sym<64, false>& lsym);
|
const elfcpp::Sym<size, false>& lsym);
|
|
|
inline bool
|
inline bool
|
global_reloc_may_be_function_pointer(Symbol_table* symtab, Layout* layout,
|
global_reloc_may_be_function_pointer(Symbol_table* symtab, Layout* layout,
|
Target_x86_64* target,
|
Target_x86_64* target,
|
Sized_relobj_file<64, false>* object,
|
Sized_relobj_file<size, false>* object,
|
unsigned int data_shndx,
|
unsigned int data_shndx,
|
Output_section* output_section,
|
Output_section* output_section,
|
const elfcpp::Rela<64, false>& reloc,
|
const elfcpp::Rela<size, false>& reloc,
|
unsigned int r_type,
|
unsigned int r_type,
|
Symbol* gsym);
|
Symbol* gsym);
|
|
|
private:
|
private:
|
static void
|
static void
|
unsupported_reloc_local(Sized_relobj_file<64, false>*, unsigned int r_type);
|
unsupported_reloc_local(Sized_relobj_file<size, false>*,
|
|
unsigned int r_type);
|
|
|
static void
|
static void
|
unsupported_reloc_global(Sized_relobj_file<64, false>*, unsigned int r_type,
|
unsupported_reloc_global(Sized_relobj_file<size, false>*,
|
Symbol*);
|
unsigned int r_type, Symbol*);
|
|
|
void
|
void
|
check_non_pic(Relobj*, unsigned int r_type, Symbol*);
|
check_non_pic(Relobj*, unsigned int r_type, Symbol*);
|
|
|
inline bool
|
inline bool
|
possible_function_pointer_reloc(unsigned int r_type);
|
possible_function_pointer_reloc(unsigned int r_type);
|
|
|
bool
|
bool
|
reloc_needs_plt_for_ifunc(Sized_relobj_file<64, false>*,
|
reloc_needs_plt_for_ifunc(Sized_relobj_file<size, false>*,
|
unsigned int r_type);
|
unsigned int r_type);
|
|
|
// Whether we have issued an error about a non-PIC compilation.
|
// Whether we have issued an error about a non-PIC compilation.
|
bool issued_non_pic_error_;
|
bool issued_non_pic_error_;
|
};
|
};
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| Line 561... |
Line 566... |
}
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}
|
|
|
// Do a relocation. Return false if the caller should not issue
|
// Do a relocation. Return false if the caller should not issue
|
// any warnings about this relocation.
|
// any warnings about this relocation.
|
inline bool
|
inline bool
|
relocate(const Relocate_info<64, false>*, Target_x86_64*, Output_section*,
|
relocate(const Relocate_info<size, false>*, Target_x86_64*,
|
size_t relnum, const elfcpp::Rela<64, false>&,
|
Output_section*,
|
unsigned int r_type, const Sized_symbol<64>*,
|
size_t relnum, const elfcpp::Rela<size, false>&,
|
const Symbol_value<64>*,
|
unsigned int r_type, const Sized_symbol<size>*,
|
unsigned char*, elfcpp::Elf_types<64>::Elf_Addr,
|
const Symbol_value<size>*,
|
|
unsigned char*, typename elfcpp::Elf_types<size>::Elf_Addr,
|
section_size_type);
|
section_size_type);
|
|
|
private:
|
private:
|
// Do a TLS relocation.
|
// Do a TLS relocation.
|
inline void
|
inline void
|
relocate_tls(const Relocate_info<64, false>*, Target_x86_64*,
|
relocate_tls(const Relocate_info<size, false>*, Target_x86_64*,
|
size_t relnum, const elfcpp::Rela<64, false>&,
|
size_t relnum, const elfcpp::Rela<size, false>&,
|
unsigned int r_type, const Sized_symbol<64>*,
|
unsigned int r_type, const Sized_symbol<size>*,
|
const Symbol_value<64>*,
|
const Symbol_value<size>*,
|
unsigned char*, elfcpp::Elf_types<64>::Elf_Addr,
|
unsigned char*, typename elfcpp::Elf_types<size>::Elf_Addr,
|
section_size_type);
|
section_size_type);
|
|
|
// Do a TLS General-Dynamic to Initial-Exec transition.
|
// Do a TLS General-Dynamic to Initial-Exec transition.
|
inline void
|
inline void
|
tls_gd_to_ie(const Relocate_info<64, false>*, size_t relnum,
|
tls_gd_to_ie(const Relocate_info<size, false>*, size_t relnum,
|
Output_segment* tls_segment,
|
Output_segment* tls_segment,
|
const elfcpp::Rela<64, false>&, unsigned int r_type,
|
const elfcpp::Rela<size, false>&, unsigned int r_type,
|
elfcpp::Elf_types<64>::Elf_Addr value,
|
typename elfcpp::Elf_types<size>::Elf_Addr value,
|
unsigned char* view,
|
unsigned char* view,
|
elfcpp::Elf_types<64>::Elf_Addr,
|
typename elfcpp::Elf_types<size>::Elf_Addr,
|
section_size_type view_size);
|
section_size_type view_size);
|
|
|
// Do a TLS General-Dynamic to Local-Exec transition.
|
// Do a TLS General-Dynamic to Local-Exec transition.
|
inline void
|
inline void
|
tls_gd_to_le(const Relocate_info<64, false>*, size_t relnum,
|
tls_gd_to_le(const Relocate_info<size, false>*, size_t relnum,
|
Output_segment* tls_segment,
|
Output_segment* tls_segment,
|
const elfcpp::Rela<64, false>&, unsigned int r_type,
|
const elfcpp::Rela<size, false>&, unsigned int r_type,
|
elfcpp::Elf_types<64>::Elf_Addr value,
|
typename elfcpp::Elf_types<size>::Elf_Addr value,
|
unsigned char* view,
|
unsigned char* view,
|
section_size_type view_size);
|
section_size_type view_size);
|
|
|
// Do a TLSDESC-style General-Dynamic to Initial-Exec transition.
|
// Do a TLSDESC-style General-Dynamic to Initial-Exec transition.
|
inline void
|
inline void
|
tls_desc_gd_to_ie(const Relocate_info<64, false>*, size_t relnum,
|
tls_desc_gd_to_ie(const Relocate_info<size, false>*, size_t relnum,
|
Output_segment* tls_segment,
|
Output_segment* tls_segment,
|
const elfcpp::Rela<64, false>&, unsigned int r_type,
|
const elfcpp::Rela<size, false>&, unsigned int r_type,
|
elfcpp::Elf_types<64>::Elf_Addr value,
|
typename elfcpp::Elf_types<size>::Elf_Addr value,
|
unsigned char* view,
|
unsigned char* view,
|
elfcpp::Elf_types<64>::Elf_Addr,
|
typename elfcpp::Elf_types<size>::Elf_Addr,
|
section_size_type view_size);
|
section_size_type view_size);
|
|
|
// Do a TLSDESC-style General-Dynamic to Local-Exec transition.
|
// Do a TLSDESC-style General-Dynamic to Local-Exec transition.
|
inline void
|
inline void
|
tls_desc_gd_to_le(const Relocate_info<64, false>*, size_t relnum,
|
tls_desc_gd_to_le(const Relocate_info<size, false>*, size_t relnum,
|
Output_segment* tls_segment,
|
Output_segment* tls_segment,
|
const elfcpp::Rela<64, false>&, unsigned int r_type,
|
const elfcpp::Rela<size, false>&, unsigned int r_type,
|
elfcpp::Elf_types<64>::Elf_Addr value,
|
typename elfcpp::Elf_types<size>::Elf_Addr value,
|
unsigned char* view,
|
unsigned char* view,
|
section_size_type view_size);
|
section_size_type view_size);
|
|
|
// Do a TLS Local-Dynamic to Local-Exec transition.
|
// Do a TLS Local-Dynamic to Local-Exec transition.
|
inline void
|
inline void
|
tls_ld_to_le(const Relocate_info<64, false>*, size_t relnum,
|
tls_ld_to_le(const Relocate_info<size, false>*, size_t relnum,
|
Output_segment* tls_segment,
|
Output_segment* tls_segment,
|
const elfcpp::Rela<64, false>&, unsigned int r_type,
|
const elfcpp::Rela<size, false>&, unsigned int r_type,
|
elfcpp::Elf_types<64>::Elf_Addr value,
|
typename elfcpp::Elf_types<size>::Elf_Addr value,
|
unsigned char* view,
|
unsigned char* view,
|
section_size_type view_size);
|
section_size_type view_size);
|
|
|
// Do a TLS Initial-Exec to Local-Exec transition.
|
// Do a TLS Initial-Exec to Local-Exec transition.
|
static inline void
|
static inline void
|
tls_ie_to_le(const Relocate_info<64, false>*, size_t relnum,
|
tls_ie_to_le(const Relocate_info<size, false>*, size_t relnum,
|
Output_segment* tls_segment,
|
Output_segment* tls_segment,
|
const elfcpp::Rela<64, false>&, unsigned int r_type,
|
const elfcpp::Rela<size, false>&, unsigned int r_type,
|
elfcpp::Elf_types<64>::Elf_Addr value,
|
typename elfcpp::Elf_types<size>::Elf_Addr value,
|
unsigned char* view,
|
unsigned char* view,
|
section_size_type view_size);
|
section_size_type view_size);
|
|
|
// This is set if we should skip the next reloc, which should be a
|
// This is set if we should skip the next reloc, which should be a
|
// PLT32 reloc against ___tls_get_addr.
|
// PLT32 reloc against ___tls_get_addr.
|
| Line 684... |
Line 690... |
make_plt_entry(Symbol_table*, Layout*, Symbol*);
|
make_plt_entry(Symbol_table*, Layout*, Symbol*);
|
|
|
// Create a PLT entry for a local STT_GNU_IFUNC symbol.
|
// Create a PLT entry for a local STT_GNU_IFUNC symbol.
|
void
|
void
|
make_local_ifunc_plt_entry(Symbol_table*, Layout*,
|
make_local_ifunc_plt_entry(Symbol_table*, Layout*,
|
Sized_relobj_file<64, false>* relobj,
|
Sized_relobj_file<size, false>* relobj,
|
unsigned int local_sym_index);
|
unsigned int local_sym_index);
|
|
|
// Define the _TLS_MODULE_BASE_ symbol in the TLS segment.
|
// Define the _TLS_MODULE_BASE_ symbol in the TLS segment.
|
void
|
void
|
define_tls_base_symbol(Symbol_table*, Layout*);
|
define_tls_base_symbol(Symbol_table*, Layout*);
|
| Line 698... |
Line 704... |
reserve_tlsdesc_entries(Symbol_table* symtab, Layout* layout);
|
reserve_tlsdesc_entries(Symbol_table* symtab, Layout* layout);
|
|
|
// Create a GOT entry for the TLS module index.
|
// Create a GOT entry for the TLS module index.
|
unsigned int
|
unsigned int
|
got_mod_index_entry(Symbol_table* symtab, Layout* layout,
|
got_mod_index_entry(Symbol_table* symtab, Layout* layout,
|
Sized_relobj_file<64, false>* object);
|
Sized_relobj_file<size, false>* object);
|
|
|
// Get the PLT section.
|
// Get the PLT section.
|
Output_data_plt_x86_64*
|
Output_data_plt_x86_64<size>*
|
plt_section() const
|
plt_section() const
|
{
|
{
|
gold_assert(this->plt_ != NULL);
|
gold_assert(this->plt_ != NULL);
|
return this->plt_;
|
return this->plt_;
|
}
|
}
|
| Line 723... |
Line 729... |
rela_irelative_section(Layout*);
|
rela_irelative_section(Layout*);
|
|
|
// Add a potential copy relocation.
|
// Add a potential copy relocation.
|
void
|
void
|
copy_reloc(Symbol_table* symtab, Layout* layout,
|
copy_reloc(Symbol_table* symtab, Layout* layout,
|
Sized_relobj_file<64, false>* object,
|
Sized_relobj_file<size, false>* object,
|
unsigned int shndx, Output_section* output_section,
|
unsigned int shndx, Output_section* output_section,
|
Symbol* sym, const elfcpp::Rela<64, false>& reloc)
|
Symbol* sym, const elfcpp::Rela<size, false>& reloc)
|
{
|
{
|
this->copy_relocs_.copy_reloc(symtab, layout,
|
this->copy_relocs_.copy_reloc(symtab, layout,
|
symtab->get_sized_symbol<64>(sym),
|
symtab->get_sized_symbol<size>(sym),
|
object, shndx, output_section,
|
object, shndx, output_section,
|
reloc, this->rela_dyn_section(layout));
|
reloc, this->rela_dyn_section(layout));
|
}
|
}
|
|
|
// Information about this specific target which we pass to the
|
// Information about this specific target which we pass to the
|
| Line 754... |
Line 760... |
// This type is used as the argument to the target specific
|
// This type is used as the argument to the target specific
|
// relocation routines. The only target specific reloc is
|
// relocation routines. The only target specific reloc is
|
// R_X86_64_TLSDESC against a local symbol.
|
// R_X86_64_TLSDESC against a local symbol.
|
struct Tlsdesc_info
|
struct Tlsdesc_info
|
{
|
{
|
Tlsdesc_info(Sized_relobj_file<64, false>* a_object, unsigned int a_r_sym)
|
Tlsdesc_info(Sized_relobj_file<size, false>* a_object, unsigned int a_r_sym)
|
: object(a_object), r_sym(a_r_sym)
|
: object(a_object), r_sym(a_r_sym)
|
{ }
|
{ }
|
|
|
// The object in which the local symbol is defined.
|
// The object in which the local symbol is defined.
|
Sized_relobj_file<64, false>* object;
|
Sized_relobj_file<size, false>* object;
|
// The local symbol index in the object.
|
// The local symbol index in the object.
|
unsigned int r_sym;
|
unsigned int r_sym;
|
};
|
};
|
|
|
// The GOT section.
|
// The GOT section.
|
Output_data_got<64, false>* got_;
|
Output_data_got<64, false>* got_;
|
// The PLT section.
|
// The PLT section.
|
Output_data_plt_x86_64* plt_;
|
Output_data_plt_x86_64<size>* plt_;
|
// The GOT PLT section.
|
// The GOT PLT section.
|
Output_data_space* got_plt_;
|
Output_data_space* got_plt_;
|
// The GOT section for IRELATIVE relocations.
|
// The GOT section for IRELATIVE relocations.
|
Output_data_space* got_irelative_;
|
Output_data_space* got_irelative_;
|
// The GOT section for TLSDESC relocations.
|
// The GOT section for TLSDESC relocations.
|
| Line 781... |
Line 787... |
// The dynamic reloc section.
|
// The dynamic reloc section.
|
Reloc_section* rela_dyn_;
|
Reloc_section* rela_dyn_;
|
// The section to use for IRELATIVE relocs.
|
// The section to use for IRELATIVE relocs.
|
Reloc_section* rela_irelative_;
|
Reloc_section* rela_irelative_;
|
// Relocs saved to avoid a COPY reloc.
|
// Relocs saved to avoid a COPY reloc.
|
Copy_relocs<elfcpp::SHT_RELA, 64, false> copy_relocs_;
|
Copy_relocs<elfcpp::SHT_RELA, size, false> copy_relocs_;
|
// Space for variables copied with a COPY reloc.
|
// Space for variables copied with a COPY reloc.
|
Output_data_space* dynbss_;
|
Output_data_space* dynbss_;
|
// Offset of the GOT entry for the TLS module index.
|
// Offset of the GOT entry for the TLS module index.
|
unsigned int got_mod_index_offset_;
|
unsigned int got_mod_index_offset_;
|
// We handle R_X86_64_TLSDESC against a local symbol as a target
|
// We handle R_X86_64_TLSDESC against a local symbol as a target
|
| Line 794... |
Line 800... |
std::vector<Tlsdesc_info> tlsdesc_reloc_info_;
|
std::vector<Tlsdesc_info> tlsdesc_reloc_info_;
|
// True if the _TLS_MODULE_BASE_ symbol has been defined.
|
// True if the _TLS_MODULE_BASE_ symbol has been defined.
|
bool tls_base_symbol_defined_;
|
bool tls_base_symbol_defined_;
|
};
|
};
|
|
|
const Target::Target_info Target_x86_64::x86_64_info =
|
template<>
|
|
const Target::Target_info Target_x86_64<64>::x86_64_info =
|
{
|
{
|
64, // size
|
64, // size
|
false, // is_big_endian
|
false, // is_big_endian
|
elfcpp::EM_X86_64, // machine_code
|
elfcpp::EM_X86_64, // machine_code
|
false, // has_make_symbol
|
false, // has_make_symbol
|
| Line 817... |
Line 824... |
elfcpp::SHF_X86_64_LARGE, // large_common_section_flags
|
elfcpp::SHF_X86_64_LARGE, // large_common_section_flags
|
NULL, // attributes_section
|
NULL, // attributes_section
|
NULL // attributes_vendor
|
NULL // attributes_vendor
|
};
|
};
|
|
|
|
template<>
|
|
const Target::Target_info Target_x86_64<32>::x86_64_info =
|
|
{
|
|
32, // size
|
|
false, // is_big_endian
|
|
elfcpp::EM_X86_64, // machine_code
|
|
false, // has_make_symbol
|
|
false, // has_resolve
|
|
true, // has_code_fill
|
|
true, // is_default_stack_executable
|
|
true, // can_icf_inline_merge_sections
|
|
'\0', // wrap_char
|
|
"/libx32/ldx32.so.1", // program interpreter
|
|
0x400000, // default_text_segment_address
|
|
0x1000, // abi_pagesize (overridable by -z max-page-size)
|
|
0x1000, // common_pagesize (overridable by -z common-page-size)
|
|
elfcpp::SHN_UNDEF, // small_common_shndx
|
|
elfcpp::SHN_X86_64_LCOMMON, // large_common_shndx
|
|
0, // small_common_section_flags
|
|
elfcpp::SHF_X86_64_LARGE, // large_common_section_flags
|
|
NULL, // attributes_section
|
|
NULL // attributes_vendor
|
|
};
|
|
|
// This is called when a new output section is created. This is where
|
// This is called when a new output section is created. This is where
|
// we handle the SHF_X86_64_LARGE.
|
// we handle the SHF_X86_64_LARGE.
|
|
|
|
template<int size>
|
void
|
void
|
Target_x86_64::do_new_output_section(Output_section* os) const
|
Target_x86_64<size>::do_new_output_section(Output_section* os) const
|
{
|
{
|
if ((os->flags() & elfcpp::SHF_X86_64_LARGE) != 0)
|
if ((os->flags() & elfcpp::SHF_X86_64_LARGE) != 0)
|
os->set_is_large_section();
|
os->set_is_large_section();
|
}
|
}
|
|
|
// Get the GOT section, creating it if necessary.
|
// Get the GOT section, creating it if necessary.
|
|
|
|
template<int size>
|
Output_data_got<64, false>*
|
Output_data_got<64, false>*
|
Target_x86_64::got_section(Symbol_table* symtab, Layout* layout)
|
Target_x86_64<size>::got_section(Symbol_table* symtab, Layout* layout)
|
{
|
{
|
if (this->got_ == NULL)
|
if (this->got_ == NULL)
|
{
|
{
|
gold_assert(symtab != NULL && layout != NULL);
|
gold_assert(symtab != NULL && layout != NULL);
|
|
|
| Line 904... |
Line 937... |
return this->got_;
|
return this->got_;
|
}
|
}
|
|
|
// Get the dynamic reloc section, creating it if necessary.
|
// Get the dynamic reloc section, creating it if necessary.
|
|
|
Target_x86_64::Reloc_section*
|
template<int size>
|
Target_x86_64::rela_dyn_section(Layout* layout)
|
typename Target_x86_64<size>::Reloc_section*
|
|
Target_x86_64<size>::rela_dyn_section(Layout* layout)
|
{
|
{
|
if (this->rela_dyn_ == NULL)
|
if (this->rela_dyn_ == NULL)
|
{
|
{
|
gold_assert(layout != NULL);
|
gold_assert(layout != NULL);
|
this->rela_dyn_ = new Reloc_section(parameters->options().combreloc());
|
this->rela_dyn_ = new Reloc_section(parameters->options().combreloc());
|
| Line 924... |
Line 958... |
// necessary. These go in .rela.dyn, but only after all other dynamic
|
// necessary. These go in .rela.dyn, but only after all other dynamic
|
// relocations. They need to follow the other dynamic relocations so
|
// relocations. They need to follow the other dynamic relocations so
|
// that they can refer to global variables initialized by those
|
// that they can refer to global variables initialized by those
|
// relocs.
|
// relocs.
|
|
|
Target_x86_64::Reloc_section*
|
template<int size>
|
Target_x86_64::rela_irelative_section(Layout* layout)
|
typename Target_x86_64<size>::Reloc_section*
|
|
Target_x86_64<size>::rela_irelative_section(Layout* layout)
|
{
|
{
|
if (this->rela_irelative_ == NULL)
|
if (this->rela_irelative_ == NULL)
|
{
|
{
|
// Make sure we have already created the dynamic reloc section.
|
// Make sure we have already created the dynamic reloc section.
|
this->rela_dyn_section(layout);
|
this->rela_dyn_section(layout);
|
| Line 943... |
Line 978... |
return this->rela_irelative_;
|
return this->rela_irelative_;
|
}
|
}
|
|
|
// Initialize the PLT section.
|
// Initialize the PLT section.
|
|
|
|
template<int size>
|
void
|
void
|
Output_data_plt_x86_64::init(Layout* layout)
|
Output_data_plt_x86_64<size>::init(Layout* layout)
|
{
|
{
|
this->rel_ = new Reloc_section(false);
|
this->rel_ = new Reloc_section(false);
|
layout->add_output_section_data(".rela.plt", elfcpp::SHT_RELA,
|
layout->add_output_section_data(".rela.plt", elfcpp::SHT_RELA,
|
elfcpp::SHF_ALLOC, this->rel_,
|
elfcpp::SHF_ALLOC, this->rel_,
|
ORDER_DYNAMIC_PLT_RELOCS, false);
|
ORDER_DYNAMIC_PLT_RELOCS, false);
|
| Line 957... |
Line 993... |
if (parameters->options().ld_generated_unwind_info())
|
if (parameters->options().ld_generated_unwind_info())
|
layout->add_eh_frame_for_plt(this, plt_eh_frame_cie, plt_eh_frame_cie_size,
|
layout->add_eh_frame_for_plt(this, plt_eh_frame_cie, plt_eh_frame_cie_size,
|
plt_eh_frame_fde, plt_eh_frame_fde_size);
|
plt_eh_frame_fde, plt_eh_frame_fde_size);
|
}
|
}
|
|
|
|
template<int size>
|
void
|
void
|
Output_data_plt_x86_64::do_adjust_output_section(Output_section* os)
|
Output_data_plt_x86_64<size>::do_adjust_output_section(Output_section* os)
|
{
|
{
|
os->set_entsize(plt_entry_size);
|
os->set_entsize(plt_entry_size);
|
}
|
}
|
|
|
// Add an entry to the PLT.
|
// Add an entry to the PLT.
|
|
|
|
template<int size>
|
void
|
void
|
Output_data_plt_x86_64::add_entry(Symbol_table* symtab, Layout* layout,
|
Output_data_plt_x86_64<size>::add_entry(Symbol_table* symtab, Layout* layout,
|
Symbol* gsym)
|
Symbol* gsym)
|
{
|
{
|
gold_assert(!gsym->has_plt_offset());
|
gold_assert(!gsym->has_plt_offset());
|
|
|
unsigned int plt_index;
|
unsigned int plt_index;
|
| Line 1042... |
Line 1080... |
}
|
}
|
|
|
// Add an entry to the PLT for a local STT_GNU_IFUNC symbol. Return
|
// Add an entry to the PLT for a local STT_GNU_IFUNC symbol. Return
|
// the PLT offset.
|
// the PLT offset.
|
|
|
|
template<int size>
|
unsigned int
|
unsigned int
|
Output_data_plt_x86_64::add_local_ifunc_entry(
|
Output_data_plt_x86_64<size>::add_local_ifunc_entry(
|
Symbol_table* symtab,
|
Symbol_table* symtab,
|
Layout* layout,
|
Layout* layout,
|
Sized_relobj_file<64, false>* relobj,
|
Sized_relobj_file<size, false>* relobj,
|
unsigned int local_sym_index)
|
unsigned int local_sym_index)
|
{
|
{
|
unsigned int plt_offset = this->irelative_count_ * plt_entry_size;
|
unsigned int plt_offset = this->irelative_count_ * plt_entry_size;
|
++this->irelative_count_;
|
++this->irelative_count_;
|
|
|
| Line 1069... |
Line 1108... |
return plt_offset;
|
return plt_offset;
|
}
|
}
|
|
|
// Add the relocation for a PLT entry.
|
// Add the relocation for a PLT entry.
|
|
|
|
template<int size>
|
void
|
void
|
Output_data_plt_x86_64::add_relocation(Symbol_table* symtab, Layout* layout,
|
Output_data_plt_x86_64<size>::add_relocation(Symbol_table* symtab,
|
Symbol* gsym, unsigned int got_offset)
|
Layout* layout,
|
|
Symbol* gsym,
|
|
unsigned int got_offset)
|
{
|
{
|
if (gsym->type() == elfcpp::STT_GNU_IFUNC
|
if (gsym->type() == elfcpp::STT_GNU_IFUNC
|
&& gsym->can_use_relative_reloc(false))
|
&& gsym->can_use_relative_reloc(false))
|
{
|
{
|
Reloc_section* rela = this->rela_irelative(symtab, layout);
|
Reloc_section* rela = this->rela_irelative(symtab, layout);
|
| Line 1091... |
Line 1133... |
}
|
}
|
|
|
// Return where the TLSDESC relocations should go, creating it if
|
// Return where the TLSDESC relocations should go, creating it if
|
// necessary. These follow the JUMP_SLOT relocations.
|
// necessary. These follow the JUMP_SLOT relocations.
|
|
|
Output_data_plt_x86_64::Reloc_section*
|
template<int size>
|
Output_data_plt_x86_64::rela_tlsdesc(Layout* layout)
|
typename Output_data_plt_x86_64<size>::Reloc_section*
|
|
Output_data_plt_x86_64<size>::rela_tlsdesc(Layout* layout)
|
{
|
{
|
if (this->tlsdesc_rel_ == NULL)
|
if (this->tlsdesc_rel_ == NULL)
|
{
|
{
|
this->tlsdesc_rel_ = new Reloc_section(false);
|
this->tlsdesc_rel_ = new Reloc_section(false);
|
layout->add_output_section_data(".rela.plt", elfcpp::SHT_RELA,
|
layout->add_output_section_data(".rela.plt", elfcpp::SHT_RELA,
|
| Line 1109... |
Line 1152... |
}
|
}
|
|
|
// Return where the IRELATIVE relocations should go in the PLT. These
|
// Return where the IRELATIVE relocations should go in the PLT. These
|
// follow the JUMP_SLOT and the TLSDESC relocations.
|
// follow the JUMP_SLOT and the TLSDESC relocations.
|
|
|
Output_data_plt_x86_64::Reloc_section*
|
template<int size>
|
Output_data_plt_x86_64::rela_irelative(Symbol_table* symtab, Layout* layout)
|
typename Output_data_plt_x86_64<size>::Reloc_section*
|
|
Output_data_plt_x86_64<size>::rela_irelative(Symbol_table* symtab,
|
|
Layout* layout)
|
{
|
{
|
if (this->irelative_rel_ == NULL)
|
if (this->irelative_rel_ == NULL)
|
{
|
{
|
// Make sure we have a place for the TLSDESC relocations, in
|
// Make sure we have a place for the TLSDESC relocations, in
|
// case we see any later on.
|
// case we see any later on.
|
| Line 1148... |
Line 1193... |
return this->irelative_rel_;
|
return this->irelative_rel_;
|
}
|
}
|
|
|
// Return the PLT address to use for a global symbol.
|
// Return the PLT address to use for a global symbol.
|
|
|
|
template<int size>
|
uint64_t
|
uint64_t
|
Output_data_plt_x86_64::address_for_global(const Symbol* gsym)
|
Output_data_plt_x86_64<size>::address_for_global(const Symbol* gsym)
|
{
|
{
|
uint64_t offset = 0;
|
uint64_t offset = 0;
|
if (gsym->type() == elfcpp::STT_GNU_IFUNC
|
if (gsym->type() == elfcpp::STT_GNU_IFUNC
|
&& gsym->can_use_relative_reloc(false))
|
&& gsym->can_use_relative_reloc(false))
|
offset = (this->count_ + 1) * plt_entry_size;
|
offset = (this->count_ + 1) * plt_entry_size;
|
| Line 1161... |
Line 1207... |
}
|
}
|
|
|
// Return the PLT address to use for a local symbol. These are always
|
// Return the PLT address to use for a local symbol. These are always
|
// IRELATIVE relocs.
|
// IRELATIVE relocs.
|
|
|
|
template<int size>
|
uint64_t
|
uint64_t
|
Output_data_plt_x86_64::address_for_local(const Relobj*, unsigned int)
|
Output_data_plt_x86_64<size>::address_for_local(const Relobj*, unsigned int)
|
{
|
{
|
return this->address() + (this->count_ + 1) * plt_entry_size;
|
return this->address() + (this->count_ + 1) * plt_entry_size;
|
}
|
}
|
|
|
// Set the final size.
|
// Set the final size.
|
|
template<int size>
|
void
|
void
|
Output_data_plt_x86_64::set_final_data_size()
|
Output_data_plt_x86_64<size>::set_final_data_size()
|
{
|
{
|
unsigned int count = this->count_ + this->irelative_count_;
|
unsigned int count = this->count_ + this->irelative_count_;
|
if (this->has_tlsdesc_entry())
|
if (this->has_tlsdesc_entry())
|
++count;
|
++count;
|
this->set_data_size((count + 1) * plt_entry_size);
|
this->set_data_size((count + 1) * plt_entry_size);
|
}
|
}
|
|
|
// The first entry in the PLT for an executable.
|
// The first entry in the PLT for an executable.
|
|
|
const unsigned char Output_data_plt_x86_64::first_plt_entry[plt_entry_size] =
|
template<int size>
|
|
const unsigned char
|
|
Output_data_plt_x86_64<size>::first_plt_entry[plt_entry_size] =
|
{
|
{
|
// From AMD64 ABI Draft 0.98, page 76
|
// From AMD64 ABI Draft 0.98, page 76
|
0xff, 0x35, // pushq contents of memory address
|
0xff, 0x35, // pushq contents of memory address
|
0, 0, 0, 0, // replaced with address of .got + 8
|
0, 0, 0, 0, // replaced with address of .got + 8
|
0xff, 0x25, // jmp indirect
|
0xff, 0x25, // jmp indirect
|
| Line 1191... |
Line 1241... |
0x90, 0x90, 0x90, 0x90 // noop (x4)
|
0x90, 0x90, 0x90, 0x90 // noop (x4)
|
};
|
};
|
|
|
// Subsequent entries in the PLT for an executable.
|
// Subsequent entries in the PLT for an executable.
|
|
|
const unsigned char Output_data_plt_x86_64::plt_entry[plt_entry_size] =
|
template<int size>
|
|
const unsigned char
|
|
Output_data_plt_x86_64<size>::plt_entry[plt_entry_size] =
|
{
|
{
|
// From AMD64 ABI Draft 0.98, page 76
|
// From AMD64 ABI Draft 0.98, page 76
|
0xff, 0x25, // jmpq indirect
|
0xff, 0x25, // jmpq indirect
|
0, 0, 0, 0, // replaced with address of symbol in .got
|
0, 0, 0, 0, // replaced with address of symbol in .got
|
0x68, // pushq immediate
|
0x68, // pushq immediate
|
| Line 1204... |
Line 1256... |
0, 0, 0, 0 // replaced with offset to start of .plt
|
0, 0, 0, 0 // replaced with offset to start of .plt
|
};
|
};
|
|
|
// The reserved TLSDESC entry in the PLT for an executable.
|
// The reserved TLSDESC entry in the PLT for an executable.
|
|
|
const unsigned char Output_data_plt_x86_64::tlsdesc_plt_entry[plt_entry_size] =
|
template<int size>
|
|
const unsigned char
|
|
Output_data_plt_x86_64<size>::tlsdesc_plt_entry[plt_entry_size] =
|
{
|
{
|
// From Alexandre Oliva, "Thread-Local Storage Descriptors for IA32
|
// From Alexandre Oliva, "Thread-Local Storage Descriptors for IA32
|
// and AMD64/EM64T", Version 0.9.4 (2005-10-10).
|
// and AMD64/EM64T", Version 0.9.4 (2005-10-10).
|
0xff, 0x35, // pushq x(%rip)
|
0xff, 0x35, // pushq x(%rip)
|
0, 0, 0, 0, // replaced with address of linkmap GOT entry (at PLTGOT + 8)
|
0, 0, 0, 0, // replaced with address of linkmap GOT entry (at PLTGOT + 8)
|
| Line 1218... |
Line 1272... |
0x40, 0
|
0x40, 0
|
};
|
};
|
|
|
// The .eh_frame unwind information for the PLT.
|
// The .eh_frame unwind information for the PLT.
|
|
|
|
template<int size>
|
const unsigned char
|
const unsigned char
|
Output_data_plt_x86_64::plt_eh_frame_cie[plt_eh_frame_cie_size] =
|
Output_data_plt_x86_64<size>::plt_eh_frame_cie[plt_eh_frame_cie_size] =
|
{
|
{
|
1, // CIE version.
|
1, // CIE version.
|
'z', // Augmentation: augmentation size included.
|
'z', // Augmentation: augmentation size included.
|
'R', // Augmentation: FDE encoding included.
|
'R', // Augmentation: FDE encoding included.
|
'\0', // End of augmentation string.
|
'\0', // End of augmentation string.
|
| Line 1237... |
Line 1292... |
elfcpp::DW_CFA_offset + 16, 1,// DW_CFA_offset: r16 (rip) at cfa-8.
|
elfcpp::DW_CFA_offset + 16, 1,// DW_CFA_offset: r16 (rip) at cfa-8.
|
elfcpp::DW_CFA_nop, // Align to 16 bytes.
|
elfcpp::DW_CFA_nop, // Align to 16 bytes.
|
elfcpp::DW_CFA_nop
|
elfcpp::DW_CFA_nop
|
};
|
};
|
|
|
|
template<int size>
|
const unsigned char
|
const unsigned char
|
Output_data_plt_x86_64::plt_eh_frame_fde[plt_eh_frame_fde_size] =
|
Output_data_plt_x86_64<size>::plt_eh_frame_fde[plt_eh_frame_fde_size] =
|
{
|
{
|
0, 0, 0, 0, // Replaced with offset to .plt.
|
0, 0, 0, 0, // Replaced with offset to .plt.
|
0, 0, 0, 0, // Replaced with size of .plt.
|
0, 0, 0, 0, // Replaced with size of .plt.
|
0, // Augmentation size.
|
0, // Augmentation size.
|
elfcpp::DW_CFA_def_cfa_offset, 16, // DW_CFA_def_cfa_offset: 16.
|
elfcpp::DW_CFA_def_cfa_offset, 16, // DW_CFA_def_cfa_offset: 16.
|
| Line 1267... |
Line 1323... |
};
|
};
|
|
|
// Write out the PLT. This uses the hand-coded instructions above,
|
// Write out the PLT. This uses the hand-coded instructions above,
|
// and adjusts them as needed. This is specified by the AMD64 ABI.
|
// and adjusts them as needed. This is specified by the AMD64 ABI.
|
|
|
|
template<int size>
|
void
|
void
|
Output_data_plt_x86_64::do_write(Output_file* of)
|
Output_data_plt_x86_64<size>::do_write(Output_file* of)
|
{
|
{
|
const off_t offset = this->offset();
|
const off_t offset = this->offset();
|
const section_size_type oview_size =
|
const section_size_type oview_size =
|
convert_to_section_size_type(this->data_size());
|
convert_to_section_size_type(this->data_size());
|
unsigned char* const oview = of->get_output_view(offset, oview_size);
|
unsigned char* const oview = of->get_output_view(offset, oview_size);
|
| Line 1288... |
Line 1345... |
got_size);
|
got_size);
|
|
|
unsigned char* pov = oview;
|
unsigned char* pov = oview;
|
|
|
// The base address of the .plt section.
|
// The base address of the .plt section.
|
elfcpp::Elf_types<64>::Elf_Addr plt_address = this->address();
|
typename elfcpp::Elf_types<size>::Elf_Addr plt_address = this->address();
|
// The base address of the .got section.
|
// The base address of the .got section.
|
elfcpp::Elf_types<64>::Elf_Addr got_base = this->got_->address();
|
typename elfcpp::Elf_types<size>::Elf_Addr got_base = this->got_->address();
|
// The base address of the PLT portion of the .got section,
|
// The base address of the PLT portion of the .got section,
|
// which is where the GOT pointer will point, and where the
|
// which is where the GOT pointer will point, and where the
|
// three reserved GOT entries are located.
|
// three reserved GOT entries are located.
|
elfcpp::Elf_types<64>::Elf_Addr got_address = this->got_plt_->address();
|
typename elfcpp::Elf_types<size>::Elf_Addr got_address
|
|
= this->got_plt_->address();
|
|
|
memcpy(pov, first_plt_entry, plt_entry_size);
|
memcpy(pov, first_plt_entry, plt_entry_size);
|
// We do a jmp relative to the PC at the end of this instruction.
|
// We do a jmp relative to the PC at the end of this instruction.
|
elfcpp::Swap_unaligned<32, false>::writeval(pov + 2,
|
elfcpp::Swap_unaligned<32, false>::writeval(pov + 2,
|
(got_address + 8
|
(got_address + 8
|
| Line 1371... |
Line 1429... |
of->write_output_view(got_file_offset, got_size, got_view);
|
of->write_output_view(got_file_offset, got_size, got_view);
|
}
|
}
|
|
|
// Create the PLT section.
|
// Create the PLT section.
|
|
|
|
template<int size>
|
void
|
void
|
Target_x86_64::make_plt_section(Symbol_table* symtab, Layout* layout)
|
Target_x86_64<size>::make_plt_section(Symbol_table* symtab, Layout* layout)
|
{
|
{
|
if (this->plt_ == NULL)
|
if (this->plt_ == NULL)
|
{
|
{
|
// Create the GOT sections first.
|
// Create the GOT sections first.
|
this->got_section(symtab, layout);
|
this->got_section(symtab, layout);
|
|
|
this->plt_ = new Output_data_plt_x86_64(layout, this->got_,
|
this->plt_ = new Output_data_plt_x86_64<size>(layout, this->got_,
|
this->got_plt_,
|
this->got_plt_,
|
this->got_irelative_);
|
this->got_irelative_);
|
layout->add_output_section_data(".plt", elfcpp::SHT_PROGBITS,
|
layout->add_output_section_data(".plt", elfcpp::SHT_PROGBITS,
|
(elfcpp::SHF_ALLOC
|
(elfcpp::SHF_ALLOC
|
| elfcpp::SHF_EXECINSTR),
|
| elfcpp::SHF_EXECINSTR),
|
| Line 1395... |
Line 1454... |
}
|
}
|
}
|
}
|
|
|
// Return the section for TLSDESC relocations.
|
// Return the section for TLSDESC relocations.
|
|
|
Target_x86_64::Reloc_section*
|
template<int size>
|
Target_x86_64::rela_tlsdesc_section(Layout* layout) const
|
typename Target_x86_64<size>::Reloc_section*
|
|
Target_x86_64<size>::rela_tlsdesc_section(Layout* layout) const
|
{
|
{
|
return this->plt_section()->rela_tlsdesc(layout);
|
return this->plt_section()->rela_tlsdesc(layout);
|
}
|
}
|
|
|
// Create a PLT entry for a global symbol.
|
// Create a PLT entry for a global symbol.
|
|
|
|
template<int size>
|
void
|
void
|
Target_x86_64::make_plt_entry(Symbol_table* symtab, Layout* layout,
|
Target_x86_64<size>::make_plt_entry(Symbol_table* symtab, Layout* layout,
|
Symbol* gsym)
|
Symbol* gsym)
|
{
|
{
|
if (gsym->has_plt_offset())
|
if (gsym->has_plt_offset())
|
return;
|
return;
|
|
|
| Line 1418... |
Line 1479... |
this->plt_->add_entry(symtab, layout, gsym);
|
this->plt_->add_entry(symtab, layout, gsym);
|
}
|
}
|
|
|
// Make a PLT entry for a local STT_GNU_IFUNC symbol.
|
// Make a PLT entry for a local STT_GNU_IFUNC symbol.
|
|
|
|
template<int size>
|
void
|
void
|
Target_x86_64::make_local_ifunc_plt_entry(Symbol_table* symtab, Layout* layout,
|
Target_x86_64<size>::make_local_ifunc_plt_entry(
|
Sized_relobj_file<64, false>* relobj,
|
Symbol_table* symtab, Layout* layout,
|
|
Sized_relobj_file<size, false>* relobj,
|
unsigned int local_sym_index)
|
unsigned int local_sym_index)
|
{
|
{
|
if (relobj->local_has_plt_offset(local_sym_index))
|
if (relobj->local_has_plt_offset(local_sym_index))
|
return;
|
return;
|
if (this->plt_ == NULL)
|
if (this->plt_ == NULL)
|
| Line 1435... |
Line 1498... |
relobj->set_local_plt_offset(local_sym_index, plt_offset);
|
relobj->set_local_plt_offset(local_sym_index, plt_offset);
|
}
|
}
|
|
|
// Return the number of entries in the PLT.
|
// Return the number of entries in the PLT.
|
|
|
|
template<int size>
|
unsigned int
|
unsigned int
|
Target_x86_64::plt_entry_count() const
|
Target_x86_64<size>::plt_entry_count() const
|
{
|
{
|
if (this->plt_ == NULL)
|
if (this->plt_ == NULL)
|
return 0;
|
return 0;
|
return this->plt_->entry_count();
|
return this->plt_->entry_count();
|
}
|
}
|
|
|
// Return the offset of the first non-reserved PLT entry.
|
// Return the offset of the first non-reserved PLT entry.
|
|
|
|
template<int size>
|
unsigned int
|
unsigned int
|
Target_x86_64::first_plt_entry_offset() const
|
Target_x86_64<size>::first_plt_entry_offset() const
|
{
|
{
|
return Output_data_plt_x86_64::first_plt_entry_offset();
|
return Output_data_plt_x86_64<size>::first_plt_entry_offset();
|
}
|
}
|
|
|
// Return the size of each PLT entry.
|
// Return the size of each PLT entry.
|
|
|
|
template<int size>
|
unsigned int
|
unsigned int
|
Target_x86_64::plt_entry_size() const
|
Target_x86_64<size>::plt_entry_size() const
|
{
|
{
|
return Output_data_plt_x86_64::get_plt_entry_size();
|
return Output_data_plt_x86_64<size>::get_plt_entry_size();
|
}
|
}
|
|
|
// Create the GOT and PLT sections for an incremental update.
|
// Create the GOT and PLT sections for an incremental update.
|
|
|
Output_data_got<64, false>*
|
template<int size>
|
Target_x86_64::init_got_plt_for_update(Symbol_table* symtab,
|
Output_data_got_base*
|
|
Target_x86_64<size>::init_got_plt_for_update(Symbol_table* symtab,
|
Layout* layout,
|
Layout* layout,
|
unsigned int got_count,
|
unsigned int got_count,
|
unsigned int plt_count)
|
unsigned int plt_count)
|
{
|
{
|
gold_assert(this->got_ == NULL);
|
gold_assert(this->got_ == NULL);
|
| Line 1512... |
Line 1579... |
elfcpp::SHF_ALLOC | elfcpp::SHF_WRITE,
|
elfcpp::SHF_ALLOC | elfcpp::SHF_WRITE,
|
this->got_irelative_,
|
this->got_irelative_,
|
ORDER_NON_RELRO_FIRST, false);
|
ORDER_NON_RELRO_FIRST, false);
|
|
|
// Create the PLT section.
|
// Create the PLT section.
|
this->plt_ = new Output_data_plt_x86_64(layout, this->got_, this->got_plt_,
|
this->plt_ = new Output_data_plt_x86_64<size>(layout, this->got_,
|
this->got_irelative_, plt_count);
|
this->got_plt_,
|
|
this->got_irelative_,
|
|
plt_count);
|
layout->add_output_section_data(".plt", elfcpp::SHT_PROGBITS,
|
layout->add_output_section_data(".plt", elfcpp::SHT_PROGBITS,
|
elfcpp::SHF_ALLOC | elfcpp::SHF_EXECINSTR,
|
elfcpp::SHF_ALLOC | elfcpp::SHF_EXECINSTR,
|
this->plt_, ORDER_PLT, false);
|
this->plt_, ORDER_PLT, false);
|
|
|
// Make the sh_info field of .rela.plt point to .plt.
|
// Make the sh_info field of .rela.plt point to .plt.
|
| Line 1531... |
Line 1600... |
}
|
}
|
|
|
// Reserve a GOT entry for a local symbol, and regenerate any
|
// Reserve a GOT entry for a local symbol, and regenerate any
|
// necessary dynamic relocations.
|
// necessary dynamic relocations.
|
|
|
|
template<int size>
|
void
|
void
|
Target_x86_64::reserve_local_got_entry(
|
Target_x86_64<size>::reserve_local_got_entry(
|
unsigned int got_index,
|
unsigned int got_index,
|
Sized_relobj<64, false>* obj,
|
Sized_relobj<size, false>* obj,
|
unsigned int r_sym,
|
unsigned int r_sym,
|
unsigned int got_type)
|
unsigned int got_type)
|
{
|
{
|
unsigned int got_offset = got_index * 8;
|
unsigned int got_offset = got_index * 8;
|
Reloc_section* rela_dyn = this->rela_dyn_section(NULL);
|
Reloc_section* rela_dyn = this->rela_dyn_section(NULL);
|
| Line 1572... |
Line 1642... |
}
|
}
|
|
|
// Reserve a GOT entry for a global symbol, and regenerate any
|
// Reserve a GOT entry for a global symbol, and regenerate any
|
// necessary dynamic relocations.
|
// necessary dynamic relocations.
|
|
|
|
template<int size>
|
void
|
void
|
Target_x86_64::reserve_global_got_entry(unsigned int got_index, Symbol* gsym,
|
Target_x86_64<size>::reserve_global_got_entry(unsigned int got_index,
|
|
Symbol* gsym,
|
unsigned int got_type)
|
unsigned int got_type)
|
{
|
{
|
unsigned int got_offset = got_index * 8;
|
unsigned int got_offset = got_index * 8;
|
Reloc_section* rela_dyn = this->rela_dyn_section(NULL);
|
Reloc_section* rela_dyn = this->rela_dyn_section(NULL);
|
|
|
| Line 1619... |
Line 1691... |
}
|
}
|
}
|
}
|
|
|
// Register an existing PLT entry for a global symbol.
|
// Register an existing PLT entry for a global symbol.
|
|
|
|
template<int size>
|
void
|
void
|
Target_x86_64::register_global_plt_entry(Symbol_table* symtab,
|
Target_x86_64<size>::register_global_plt_entry(Symbol_table* symtab,
|
Layout* layout,
|
Layout* layout,
|
unsigned int plt_index,
|
unsigned int plt_index,
|
Symbol* gsym)
|
Symbol* gsym)
|
{
|
{
|
gold_assert(this->plt_ != NULL);
|
gold_assert(this->plt_ != NULL);
|
| Line 1638... |
Line 1711... |
this->plt_->add_relocation(symtab, layout, gsym, got_offset);
|
this->plt_->add_relocation(symtab, layout, gsym, got_offset);
|
}
|
}
|
|
|
// Force a COPY relocation for a given symbol.
|
// Force a COPY relocation for a given symbol.
|
|
|
|
template<int size>
|
void
|
void
|
Target_x86_64::emit_copy_reloc(
|
Target_x86_64<size>::emit_copy_reloc(
|
Symbol_table* symtab, Symbol* sym, Output_section* os, off_t offset)
|
Symbol_table* symtab, Symbol* sym, Output_section* os, off_t offset)
|
{
|
{
|
this->copy_relocs_.emit_copy_reloc(symtab,
|
this->copy_relocs_.emit_copy_reloc(symtab,
|
symtab->get_sized_symbol<64>(sym),
|
symtab->get_sized_symbol<size>(sym),
|
os,
|
os,
|
offset,
|
offset,
|
this->rela_dyn_section(NULL));
|
this->rela_dyn_section(NULL));
|
}
|
}
|
|
|
// Define the _TLS_MODULE_BASE_ symbol in the TLS segment.
|
// Define the _TLS_MODULE_BASE_ symbol in the TLS segment.
|
|
|
|
template<int size>
|
void
|
void
|
Target_x86_64::define_tls_base_symbol(Symbol_table* symtab, Layout* layout)
|
Target_x86_64<size>::define_tls_base_symbol(Symbol_table* symtab,
|
|
Layout* layout)
|
{
|
{
|
if (this->tls_base_symbol_defined_)
|
if (this->tls_base_symbol_defined_)
|
return;
|
return;
|
|
|
Output_segment* tls_segment = layout->tls_segment();
|
Output_segment* tls_segment = layout->tls_segment();
|
| Line 1677... |
Line 1753... |
this->tls_base_symbol_defined_ = true;
|
this->tls_base_symbol_defined_ = true;
|
}
|
}
|
|
|
// Create the reserved PLT and GOT entries for the TLS descriptor resolver.
|
// Create the reserved PLT and GOT entries for the TLS descriptor resolver.
|
|
|
|
template<int size>
|
void
|
void
|
Target_x86_64::reserve_tlsdesc_entries(Symbol_table* symtab,
|
Target_x86_64<size>::reserve_tlsdesc_entries(Symbol_table* symtab,
|
Layout* layout)
|
Layout* layout)
|
{
|
{
|
if (this->plt_ == NULL)
|
if (this->plt_ == NULL)
|
this->make_plt_section(symtab, layout);
|
this->make_plt_section(symtab, layout);
|
|
|
| Line 1697... |
Line 1774... |
}
|
}
|
}
|
}
|
|
|
// Create a GOT entry for the TLS module index.
|
// Create a GOT entry for the TLS module index.
|
|
|
|
template<int size>
|
unsigned int
|
unsigned int
|
Target_x86_64::got_mod_index_entry(Symbol_table* symtab, Layout* layout,
|
Target_x86_64<size>::got_mod_index_entry(Symbol_table* symtab, Layout* layout,
|
Sized_relobj_file<64, false>* object)
|
Sized_relobj_file<size, false>* object)
|
{
|
{
|
if (this->got_mod_index_offset_ == -1U)
|
if (this->got_mod_index_offset_ == -1U)
|
{
|
{
|
gold_assert(symtab != NULL && layout != NULL && object != NULL);
|
gold_assert(symtab != NULL && layout != NULL && object != NULL);
|
Reloc_section* rela_dyn = this->rela_dyn_section(layout);
|
Reloc_section* rela_dyn = this->rela_dyn_section(layout);
|
| Line 1719... |
Line 1797... |
|
|
// Optimize the TLS relocation type based on what we know about the
|
// 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
|
// symbol. IS_FINAL is true if the final address of this symbol is
|
// known at link time.
|
// known at link time.
|
|
|
|
template<int size>
|
tls::Tls_optimization
|
tls::Tls_optimization
|
Target_x86_64::optimize_tls_reloc(bool is_final, int r_type)
|
Target_x86_64<size>::optimize_tls_reloc(bool is_final, int r_type)
|
{
|
{
|
// If we are generating a shared library, then we can't do anything
|
// If we are generating a shared library, then we can't do anything
|
// in the linker.
|
// in the linker.
|
if (parameters->options().shared())
|
if (parameters->options().shared())
|
return tls::TLSOPT_NONE;
|
return tls::TLSOPT_NONE;
|
| Line 1772... |
Line 1851... |
}
|
}
|
}
|
}
|
|
|
// Get the Reference_flags for a particular relocation.
|
// Get the Reference_flags for a particular relocation.
|
|
|
|
template<int size>
|
int
|
int
|
Target_x86_64::Scan::get_reference_flags(unsigned int r_type)
|
Target_x86_64<size>::Scan::get_reference_flags(unsigned int r_type)
|
{
|
{
|
switch (r_type)
|
switch (r_type)
|
{
|
{
|
case elfcpp::R_X86_64_NONE:
|
case elfcpp::R_X86_64_NONE:
|
case elfcpp::R_X86_64_GNU_VTINHERIT:
|
case elfcpp::R_X86_64_GNU_VTINHERIT:
|
| Line 1839... |
Line 1919... |
}
|
}
|
}
|
}
|
|
|
// Report an unsupported relocation against a local symbol.
|
// Report an unsupported relocation against a local symbol.
|
|
|
|
template<int size>
|
void
|
void
|
Target_x86_64::Scan::unsupported_reloc_local(
|
Target_x86_64<size>::Scan::unsupported_reloc_local(
|
Sized_relobj_file<64, false>* object,
|
Sized_relobj_file<size, false>* object,
|
unsigned int r_type)
|
unsigned int r_type)
|
{
|
{
|
gold_error(_("%s: unsupported reloc %u against local symbol"),
|
gold_error(_("%s: unsupported reloc %u against local symbol"),
|
object->name().c_str(), r_type);
|
object->name().c_str(), r_type);
|
}
|
}
|
| Line 1858... |
Line 1939... |
// glibc dynamic linker supports, so it seems appropriate to issue an
|
// glibc dynamic linker supports, so it seems appropriate to issue an
|
// error even if the section is not read-only. If GSYM is not NULL,
|
// error even if the section is not read-only. If GSYM is not NULL,
|
// it is the symbol the relocation is against; if it is NULL, the
|
// it is the symbol the relocation is against; if it is NULL, the
|
// relocation is against a local symbol.
|
// relocation is against a local symbol.
|
|
|
|
template<int size>
|
void
|
void
|
Target_x86_64::Scan::check_non_pic(Relobj* object, unsigned int r_type,
|
Target_x86_64<size>::Scan::check_non_pic(Relobj* object, unsigned int r_type,
|
Symbol* gsym)
|
Symbol* gsym)
|
{
|
{
|
switch (r_type)
|
switch (r_type)
|
{
|
{
|
// These are the relocation types supported by glibc for x86_64
|
// These are the relocation types supported by glibc for x86_64
|
| Line 1888... |
Line 1970... |
&& !gsym->is_undefined()
|
&& !gsym->is_undefined()
|
&& !gsym->is_preemptible()))
|
&& !gsym->is_preemptible()))
|
return;
|
return;
|
/* Fall through. */
|
/* Fall through. */
|
case elfcpp::R_X86_64_32:
|
case elfcpp::R_X86_64_32:
|
|
// R_X86_64_32 is OK for x32.
|
|
if (size == 32 && r_type == elfcpp::R_X86_64_32)
|
|
return;
|
if (this->issued_non_pic_error_)
|
if (this->issued_non_pic_error_)
|
return;
|
return;
|
gold_assert(parameters->options().output_is_position_independent());
|
gold_assert(parameters->options().output_is_position_independent());
|
if (gsym == NULL)
|
if (gsym == NULL)
|
object->error(_("requires dynamic R_X86_64_32 reloc which may "
|
object->error(_("requires dynamic R_X86_64_32 reloc which may "
|
| Line 1925... |
Line 2010... |
}
|
}
|
|
|
// Return whether we need to make a PLT entry for a relocation of the
|
// Return whether we need to make a PLT entry for a relocation of the
|
// given type against a STT_GNU_IFUNC symbol.
|
// given type against a STT_GNU_IFUNC symbol.
|
|
|
|
template<int size>
|
bool
|
bool
|
Target_x86_64::Scan::reloc_needs_plt_for_ifunc(
|
Target_x86_64<size>::Scan::reloc_needs_plt_for_ifunc(
|
Sized_relobj_file<64, false>* object,
|
Sized_relobj_file<size, false>* object,
|
unsigned int r_type)
|
unsigned int r_type)
|
{
|
{
|
int flags = Scan::get_reference_flags(r_type);
|
int flags = Scan::get_reference_flags(r_type);
|
if (flags & Symbol::TLS_REF)
|
if (flags & Symbol::TLS_REF)
|
gold_error(_("%s: unsupported TLS reloc %u for IFUNC symbol"),
|
gold_error(_("%s: unsupported TLS reloc %u for IFUNC symbol"),
|
| Line 1939... |
Line 2025... |
return flags != 0;
|
return flags != 0;
|
}
|
}
|
|
|
// Scan a relocation for a local symbol.
|
// Scan a relocation for a local symbol.
|
|
|
|
template<int size>
|
inline void
|
inline void
|
Target_x86_64::Scan::local(Symbol_table* symtab,
|
Target_x86_64<size>::Scan::local(Symbol_table* symtab,
|
Layout* layout,
|
Layout* layout,
|
Target_x86_64* target,
|
Target_x86_64<size>* target,
|
Sized_relobj_file<64, false>* object,
|
Sized_relobj_file<size, false>* object,
|
unsigned int data_shndx,
|
unsigned int data_shndx,
|
Output_section* output_section,
|
Output_section* output_section,
|
const elfcpp::Rela<64, false>& reloc,
|
const elfcpp::Rela<size, false>& reloc,
|
unsigned int r_type,
|
unsigned int r_type,
|
const elfcpp::Sym<64, false>& lsym)
|
const elfcpp::Sym<size, false>& lsym)
|
{
|
{
|
// A local STT_GNU_IFUNC symbol may require a PLT entry.
|
// A local STT_GNU_IFUNC symbol may require a PLT entry.
|
bool is_ifunc = lsym.get_st_type() == elfcpp::STT_GNU_IFUNC;
|
bool is_ifunc = lsym.get_st_type() == elfcpp::STT_GNU_IFUNC;
|
if (is_ifunc && this->reloc_needs_plt_for_ifunc(object, r_type))
|
if (is_ifunc && this->reloc_needs_plt_for_ifunc(object, r_type))
|
{
|
{
|
unsigned int r_sym = elfcpp::elf_r_sym<64>(reloc.get_r_info());
|
unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info());
|
target->make_local_ifunc_plt_entry(symtab, layout, object, r_sym);
|
target->make_local_ifunc_plt_entry(symtab, layout, object, r_sym);
|
}
|
}
|
|
|
switch (r_type)
|
switch (r_type)
|
{
|
{
|
| Line 1974... |
Line 2061... |
// link-time value, so we flag the location with an
|
// link-time value, so we flag the location with an
|
// R_X86_64_RELATIVE relocation so the dynamic loader can
|
// R_X86_64_RELATIVE relocation so the dynamic loader can
|
// relocate it easily.
|
// relocate it easily.
|
if (parameters->options().output_is_position_independent())
|
if (parameters->options().output_is_position_independent())
|
{
|
{
|
unsigned int r_sym = elfcpp::elf_r_sym<64>(reloc.get_r_info());
|
unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info());
|
Reloc_section* rela_dyn = target->rela_dyn_section(layout);
|
Reloc_section* rela_dyn = target->rela_dyn_section(layout);
|
rela_dyn->add_local_relative(object, r_sym,
|
rela_dyn->add_local_relative(object, r_sym,
|
elfcpp::R_X86_64_RELATIVE,
|
elfcpp::R_X86_64_RELATIVE,
|
output_section, data_shndx,
|
output_section, data_shndx,
|
reloc.get_r_offset(),
|
reloc.get_r_offset(),
|
| Line 1994... |
Line 2081... |
// executable), we need to create a dynamic relocation for this
|
// executable), we need to create a dynamic relocation for this
|
// location. We can't use an R_X86_64_RELATIVE relocation
|
// location. We can't use an R_X86_64_RELATIVE relocation
|
// because that is always a 64-bit relocation.
|
// because that is always a 64-bit relocation.
|
if (parameters->options().output_is_position_independent())
|
if (parameters->options().output_is_position_independent())
|
{
|
{
|
|
// Use R_X86_64_RELATIVE relocation for R_X86_64_32 under x32.
|
|
if (size == 32 && r_type == elfcpp::R_X86_64_32)
|
|
{
|
|
unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info());
|
|
Reloc_section* rela_dyn = target->rela_dyn_section(layout);
|
|
rela_dyn->add_local_relative(object, r_sym,
|
|
elfcpp::R_X86_64_RELATIVE,
|
|
output_section, data_shndx,
|
|
reloc.get_r_offset(),
|
|
reloc.get_r_addend(), is_ifunc);
|
|
break;
|
|
}
|
|
|
this->check_non_pic(object, r_type, NULL);
|
this->check_non_pic(object, r_type, NULL);
|
|
|
Reloc_section* rela_dyn = target->rela_dyn_section(layout);
|
Reloc_section* rela_dyn = target->rela_dyn_section(layout);
|
unsigned int r_sym = elfcpp::elf_r_sym<64>(reloc.get_r_info());
|
unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info());
|
if (lsym.get_st_type() != elfcpp::STT_SECTION)
|
if (lsym.get_st_type() != elfcpp::STT_SECTION)
|
rela_dyn->add_local(object, r_sym, r_type, output_section,
|
rela_dyn->add_local(object, r_sym, r_type, output_section,
|
data_shndx, reloc.get_r_offset(),
|
data_shndx, reloc.get_r_offset(),
|
reloc.get_r_addend());
|
reloc.get_r_addend());
|
else
|
else
|
| Line 2050... |
Line 2150... |
case elfcpp::R_X86_64_GOTPCREL:
|
case elfcpp::R_X86_64_GOTPCREL:
|
case elfcpp::R_X86_64_GOTPLT64:
|
case elfcpp::R_X86_64_GOTPLT64:
|
{
|
{
|
// The symbol requires a GOT entry.
|
// The symbol requires a GOT entry.
|
Output_data_got<64, false>* got = target->got_section(symtab, layout);
|
Output_data_got<64, false>* got = target->got_section(symtab, layout);
|
unsigned int r_sym = elfcpp::elf_r_sym<64>(reloc.get_r_info());
|
unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info());
|
|
|
// For a STT_GNU_IFUNC symbol we want the PLT offset. That
|
// For a STT_GNU_IFUNC symbol we want the PLT offset. That
|
// lets function pointers compare correctly with shared
|
// lets function pointers compare correctly with shared
|
// libraries. Otherwise we would need an IRELATIVE reloc.
|
// libraries. Otherwise we would need an IRELATIVE reloc.
|
bool is_new;
|
bool is_new;
|
| Line 2117... |
Line 2217... |
case elfcpp::R_X86_64_GOTTPOFF: // Initial-exec
|
case elfcpp::R_X86_64_GOTTPOFF: // Initial-exec
|
case elfcpp::R_X86_64_TPOFF32: // Local-exec
|
case elfcpp::R_X86_64_TPOFF32: // Local-exec
|
{
|
{
|
bool output_is_shared = parameters->options().shared();
|
bool output_is_shared = parameters->options().shared();
|
const tls::Tls_optimization optimized_type
|
const tls::Tls_optimization optimized_type
|
= Target_x86_64::optimize_tls_reloc(!output_is_shared, r_type);
|
= Target_x86_64<size>::optimize_tls_reloc(!output_is_shared,
|
|
r_type);
|
switch (r_type)
|
switch (r_type)
|
{
|
{
|
case elfcpp::R_X86_64_TLSGD: // General-dynamic
|
case elfcpp::R_X86_64_TLSGD: // General-dynamic
|
if (optimized_type == tls::TLSOPT_NONE)
|
if (optimized_type == tls::TLSOPT_NONE)
|
{
|
{
|
// Create a pair of GOT entries for the module index and
|
// Create a pair of GOT entries for the module index and
|
// dtv-relative offset.
|
// dtv-relative offset.
|
Output_data_got<64, false>* got
|
Output_data_got<64, false>* got
|
= target->got_section(symtab, layout);
|
= target->got_section(symtab, layout);
|
unsigned int r_sym = elfcpp::elf_r_sym<64>(reloc.get_r_info());
|
unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info());
|
unsigned int shndx = lsym.get_st_shndx();
|
unsigned int shndx = lsym.get_st_shndx();
|
bool is_ordinary;
|
bool is_ordinary;
|
shndx = object->adjust_sym_shndx(r_sym, shndx, &is_ordinary);
|
shndx = object->adjust_sym_shndx(r_sym, shndx, &is_ordinary);
|
if (!is_ordinary)
|
if (!is_ordinary)
|
object->error(_("local symbol %u has bad shndx %u"),
|
object->error(_("local symbol %u has bad shndx %u"),
|
r_sym, shndx);
|
r_sym, shndx);
|
else
|
else
|
got->add_local_pair_with_rela(object, r_sym,
|
got->add_local_pair_with_rel(object, r_sym,
|
shndx,
|
shndx,
|
GOT_TYPE_TLS_PAIR,
|
GOT_TYPE_TLS_PAIR,
|
target->rela_dyn_section(layout),
|
target->rela_dyn_section(layout),
|
elfcpp::R_X86_64_DTPMOD64, 0);
|
elfcpp::R_X86_64_DTPMOD64, 0);
|
}
|
}
|
| Line 2159... |
Line 2260... |
// is resolved lazily, so the GOT entry needs to be in
|
// is resolved lazily, so the GOT entry needs to be in
|
// an area in .got.plt, not .got. Call got_section to
|
// an area in .got.plt, not .got. Call got_section to
|
// make sure the section has been created.
|
// make sure the section has been created.
|
target->got_section(symtab, layout);
|
target->got_section(symtab, layout);
|
Output_data_got<64, false>* got = target->got_tlsdesc_section();
|
Output_data_got<64, false>* got = target->got_tlsdesc_section();
|
unsigned int r_sym = elfcpp::elf_r_sym<64>(reloc.get_r_info());
|
unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info());
|
if (!object->local_has_got_offset(r_sym, GOT_TYPE_TLS_DESC))
|
if (!object->local_has_got_offset(r_sym, GOT_TYPE_TLS_DESC))
|
{
|
{
|
unsigned int got_offset = got->add_constant(0);
|
unsigned int got_offset = got->add_constant(0);
|
got->add_constant(0);
|
got->add_constant(0);
|
object->set_local_got_offset(r_sym, GOT_TYPE_TLS_DESC,
|
object->set_local_got_offset(r_sym, GOT_TYPE_TLS_DESC,
|
| Line 2204... |
Line 2305... |
if (optimized_type == tls::TLSOPT_NONE)
|
if (optimized_type == tls::TLSOPT_NONE)
|
{
|
{
|
// Create a GOT entry for the tp-relative offset.
|
// Create a GOT entry for the tp-relative offset.
|
Output_data_got<64, false>* got
|
Output_data_got<64, false>* got
|
= target->got_section(symtab, layout);
|
= target->got_section(symtab, layout);
|
unsigned int r_sym = elfcpp::elf_r_sym<64>(reloc.get_r_info());
|
unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info());
|
got->add_local_with_rela(object, r_sym, GOT_TYPE_TLS_OFFSET,
|
got->add_local_with_rel(object, r_sym, GOT_TYPE_TLS_OFFSET,
|
target->rela_dyn_section(layout),
|
target->rela_dyn_section(layout),
|
elfcpp::R_X86_64_TPOFF64);
|
elfcpp::R_X86_64_TPOFF64);
|
}
|
}
|
else if (optimized_type != tls::TLSOPT_TO_LE)
|
else if (optimized_type != tls::TLSOPT_TO_LE)
|
unsupported_reloc_local(object, r_type);
|
unsupported_reloc_local(object, r_type);
|
| Line 2237... |
Line 2338... |
}
|
}
|
|
|
|
|
// Report an unsupported relocation against a global symbol.
|
// Report an unsupported relocation against a global symbol.
|
|
|
|
template<int size>
|
void
|
void
|
Target_x86_64::Scan::unsupported_reloc_global(
|
Target_x86_64<size>::Scan::unsupported_reloc_global(
|
Sized_relobj_file<64, false>* object,
|
Sized_relobj_file<size, false>* object,
|
unsigned int r_type,
|
unsigned int r_type,
|
Symbol* gsym)
|
Symbol* gsym)
|
{
|
{
|
gold_error(_("%s: unsupported reloc %u against global symbol %s"),
|
gold_error(_("%s: unsupported reloc %u against global symbol %s"),
|
object->name().c_str(), r_type, gsym->demangled_name().c_str());
|
object->name().c_str(), r_type, gsym->demangled_name().c_str());
|
}
|
}
|
|
|
// Returns true if this relocation type could be that of a function pointer.
|
// Returns true if this relocation type could be that of a function pointer.
|
|
template<int size>
|
inline bool
|
inline bool
|
Target_x86_64::Scan::possible_function_pointer_reloc(unsigned int r_type)
|
Target_x86_64<size>::Scan::possible_function_pointer_reloc(unsigned int r_type)
|
{
|
{
|
switch (r_type)
|
switch (r_type)
|
{
|
{
|
case elfcpp::R_X86_64_64:
|
case elfcpp::R_X86_64_64:
|
case elfcpp::R_X86_64_32:
|
case elfcpp::R_X86_64_32:
|
| Line 2274... |
Line 2377... |
|
|
// For safe ICF, scan a relocation for a local symbol to check if it
|
// 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
|
// corresponds to a function pointer being taken. In that case mark
|
// the function whose pointer was taken as not foldable.
|
// the function whose pointer was taken as not foldable.
|
|
|
|
template<int size>
|
inline bool
|
inline bool
|
Target_x86_64::Scan::local_reloc_may_be_function_pointer(
|
Target_x86_64<size>::Scan::local_reloc_may_be_function_pointer(
|
Symbol_table* ,
|
Symbol_table* ,
|
Layout* ,
|
Layout* ,
|
Target_x86_64* ,
|
Target_x86_64<size>* ,
|
Sized_relobj_file<64, false>* ,
|
Sized_relobj_file<size, false>* ,
|
unsigned int ,
|
unsigned int ,
|
Output_section* ,
|
Output_section* ,
|
const elfcpp::Rela<64, false>& ,
|
const elfcpp::Rela<size, false>& ,
|
unsigned int r_type,
|
unsigned int r_type,
|
const elfcpp::Sym<64, false>&)
|
const elfcpp::Sym<size, false>&)
|
{
|
{
|
// When building a shared library, do not fold any local symbols as it is
|
// 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
|
// not possible to distinguish pointer taken versus a call by looking at
|
// the relocation types.
|
// the relocation types.
|
return (parameters->options().shared()
|
return (parameters->options().shared()
|
| Line 2297... |
Line 2401... |
|
|
// For safe ICF, scan a relocation for a global symbol to check if it
|
// 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
|
// corresponds to a function pointer being taken. In that case mark
|
// the function whose pointer was taken as not foldable.
|
// the function whose pointer was taken as not foldable.
|
|
|
|
template<int size>
|
inline bool
|
inline bool
|
Target_x86_64::Scan::global_reloc_may_be_function_pointer(
|
Target_x86_64<size>::Scan::global_reloc_may_be_function_pointer(
|
Symbol_table*,
|
Symbol_table*,
|
Layout* ,
|
Layout* ,
|
Target_x86_64* ,
|
Target_x86_64<size>* ,
|
Sized_relobj_file<64, false>* ,
|
Sized_relobj_file<size, false>* ,
|
unsigned int ,
|
unsigned int ,
|
Output_section* ,
|
Output_section* ,
|
const elfcpp::Rela<64, false>& ,
|
const elfcpp::Rela<size, false>& ,
|
unsigned int r_type,
|
unsigned int r_type,
|
Symbol* gsym)
|
Symbol* gsym)
|
{
|
{
|
// When building a shared library, do not fold symbols whose visibility
|
// When building a shared library, do not fold symbols whose visibility
|
// is hidden, internal or protected.
|
// is hidden, internal or protected.
|
| Line 2320... |
Line 2425... |
|| possible_function_pointer_reloc(r_type));
|
|| possible_function_pointer_reloc(r_type));
|
}
|
}
|
|
|
// Scan a relocation for a global symbol.
|
// Scan a relocation for a global symbol.
|
|
|
|
template<int size>
|
inline void
|
inline void
|
Target_x86_64::Scan::global(Symbol_table* symtab,
|
Target_x86_64<size>::Scan::global(Symbol_table* symtab,
|
Layout* layout,
|
Layout* layout,
|
Target_x86_64* target,
|
Target_x86_64<size>* target,
|
Sized_relobj_file<64, false>* object,
|
Sized_relobj_file<size, false>* object,
|
unsigned int data_shndx,
|
unsigned int data_shndx,
|
Output_section* output_section,
|
Output_section* output_section,
|
const elfcpp::Rela<64, false>& reloc,
|
const elfcpp::Rela<size, false>& reloc,
|
unsigned int r_type,
|
unsigned int r_type,
|
Symbol* gsym)
|
Symbol* gsym)
|
{
|
{
|
// A STT_GNU_IFUNC symbol may require a PLT entry.
|
// A STT_GNU_IFUNC symbol may require a PLT entry.
|
if (gsym->type() == elfcpp::STT_GNU_IFUNC
|
if (gsym->type() == elfcpp::STT_GNU_IFUNC
|
| Line 2368... |
Line 2474... |
if (gsym->may_need_copy_reloc())
|
if (gsym->may_need_copy_reloc())
|
{
|
{
|
target->copy_reloc(symtab, layout, object,
|
target->copy_reloc(symtab, layout, object,
|
data_shndx, output_section, gsym, reloc);
|
data_shndx, output_section, gsym, reloc);
|
}
|
}
|
else if (r_type == elfcpp::R_X86_64_64
|
else if (((size == 64 && r_type == elfcpp::R_X86_64_64)
|
|
|| (size == 32 && r_type == elfcpp::R_X86_64_32))
|
&& gsym->type() == elfcpp::STT_GNU_IFUNC
|
&& gsym->type() == elfcpp::STT_GNU_IFUNC
|
&& gsym->can_use_relative_reloc(false)
|
&& gsym->can_use_relative_reloc(false)
|
&& !gsym->is_from_dynobj()
|
&& !gsym->is_from_dynobj()
|
&& !gsym->is_undefined()
|
&& !gsym->is_undefined()
|
&& !gsym->is_preemptible())
|
&& !gsym->is_preemptible())
|
| Line 2479... |
Line 2586... |
|| gsym->is_preemptible()
|
|| gsym->is_preemptible()
|
|| (gsym->visibility() == elfcpp::STV_PROTECTED
|
|| (gsym->visibility() == elfcpp::STV_PROTECTED
|
&& parameters->options().shared())
|
&& parameters->options().shared())
|
|| (gsym->type() == elfcpp::STT_GNU_IFUNC
|
|| (gsym->type() == elfcpp::STT_GNU_IFUNC
|
&& parameters->options().output_is_position_independent()))
|
&& parameters->options().output_is_position_independent()))
|
got->add_global_with_rela(gsym, GOT_TYPE_STANDARD, rela_dyn,
|
got->add_global_with_rel(gsym, GOT_TYPE_STANDARD, rela_dyn,
|
elfcpp::R_X86_64_GLOB_DAT);
|
elfcpp::R_X86_64_GLOB_DAT);
|
else
|
else
|
{
|
{
|
// For a STT_GNU_IFUNC symbol we want to write the PLT
|
// For a STT_GNU_IFUNC symbol we want to write the PLT
|
// offset into the GOT, so that function pointer
|
// offset into the GOT, so that function pointer
|
| Line 2568... |
Line 2675... |
case elfcpp::R_X86_64_GOTTPOFF: // Initial-exec
|
case elfcpp::R_X86_64_GOTTPOFF: // Initial-exec
|
case elfcpp::R_X86_64_TPOFF32: // Local-exec
|
case elfcpp::R_X86_64_TPOFF32: // Local-exec
|
{
|
{
|
const bool is_final = gsym->final_value_is_known();
|
const bool is_final = gsym->final_value_is_known();
|
const tls::Tls_optimization optimized_type
|
const tls::Tls_optimization optimized_type
|
= Target_x86_64::optimize_tls_reloc(is_final, r_type);
|
= Target_x86_64<size>::optimize_tls_reloc(is_final, r_type);
|
switch (r_type)
|
switch (r_type)
|
{
|
{
|
case elfcpp::R_X86_64_TLSGD: // General-dynamic
|
case elfcpp::R_X86_64_TLSGD: // General-dynamic
|
if (optimized_type == tls::TLSOPT_NONE)
|
if (optimized_type == tls::TLSOPT_NONE)
|
{
|
{
|
// Create a pair of GOT entries for the module index and
|
// Create a pair of GOT entries for the module index and
|
// dtv-relative offset.
|
// dtv-relative offset.
|
Output_data_got<64, false>* got
|
Output_data_got<64, false>* got
|
= target->got_section(symtab, layout);
|
= target->got_section(symtab, layout);
|
got->add_global_pair_with_rela(gsym, GOT_TYPE_TLS_PAIR,
|
got->add_global_pair_with_rel(gsym, GOT_TYPE_TLS_PAIR,
|
target->rela_dyn_section(layout),
|
target->rela_dyn_section(layout),
|
elfcpp::R_X86_64_DTPMOD64,
|
elfcpp::R_X86_64_DTPMOD64,
|
elfcpp::R_X86_64_DTPOFF64);
|
elfcpp::R_X86_64_DTPOFF64);
|
}
|
}
|
else if (optimized_type == tls::TLSOPT_TO_IE)
|
else if (optimized_type == tls::TLSOPT_TO_IE)
|
{
|
{
|
// Create a GOT entry for the tp-relative offset.
|
// Create a GOT entry for the tp-relative offset.
|
Output_data_got<64, false>* got
|
Output_data_got<64, false>* got
|
= target->got_section(symtab, layout);
|
= target->got_section(symtab, layout);
|
got->add_global_with_rela(gsym, GOT_TYPE_TLS_OFFSET,
|
got->add_global_with_rel(gsym, GOT_TYPE_TLS_OFFSET,
|
target->rela_dyn_section(layout),
|
target->rela_dyn_section(layout),
|
elfcpp::R_X86_64_TPOFF64);
|
elfcpp::R_X86_64_TPOFF64);
|
}
|
}
|
else if (optimized_type != tls::TLSOPT_TO_LE)
|
else if (optimized_type != tls::TLSOPT_TO_LE)
|
unsupported_reloc_global(object, r_type, gsym);
|
unsupported_reloc_global(object, r_type, gsym);
|
| Line 2611... |
Line 2718... |
// .got.plt, not .got. Call got_section to make sure
|
// .got.plt, not .got. Call got_section to make sure
|
// the section has been created.
|
// the section has been created.
|
target->got_section(symtab, layout);
|
target->got_section(symtab, layout);
|
Output_data_got<64, false>* got = target->got_tlsdesc_section();
|
Output_data_got<64, false>* got = target->got_tlsdesc_section();
|
Reloc_section* rt = target->rela_tlsdesc_section(layout);
|
Reloc_section* rt = target->rela_tlsdesc_section(layout);
|
got->add_global_pair_with_rela(gsym, GOT_TYPE_TLS_DESC, rt,
|
got->add_global_pair_with_rel(gsym, GOT_TYPE_TLS_DESC, rt,
|
elfcpp::R_X86_64_TLSDESC, 0);
|
elfcpp::R_X86_64_TLSDESC, 0);
|
}
|
}
|
else if (optimized_type == tls::TLSOPT_TO_IE)
|
else if (optimized_type == tls::TLSOPT_TO_IE)
|
{
|
{
|
// Create a GOT entry for the tp-relative offset.
|
// Create a GOT entry for the tp-relative offset.
|
Output_data_got<64, false>* got
|
Output_data_got<64, false>* got
|
= target->got_section(symtab, layout);
|
= target->got_section(symtab, layout);
|
got->add_global_with_rela(gsym, GOT_TYPE_TLS_OFFSET,
|
got->add_global_with_rel(gsym, GOT_TYPE_TLS_OFFSET,
|
target->rela_dyn_section(layout),
|
target->rela_dyn_section(layout),
|
elfcpp::R_X86_64_TPOFF64);
|
elfcpp::R_X86_64_TPOFF64);
|
}
|
}
|
else if (optimized_type != tls::TLSOPT_TO_LE)
|
else if (optimized_type != tls::TLSOPT_TO_LE)
|
unsupported_reloc_global(object, r_type, gsym);
|
unsupported_reloc_global(object, r_type, gsym);
|
| Line 2651... |
Line 2758... |
if (optimized_type == tls::TLSOPT_NONE)
|
if (optimized_type == tls::TLSOPT_NONE)
|
{
|
{
|
// Create a GOT entry for the tp-relative offset.
|
// Create a GOT entry for the tp-relative offset.
|
Output_data_got<64, false>* got
|
Output_data_got<64, false>* got
|
= target->got_section(symtab, layout);
|
= target->got_section(symtab, layout);
|
got->add_global_with_rela(gsym, GOT_TYPE_TLS_OFFSET,
|
got->add_global_with_rel(gsym, GOT_TYPE_TLS_OFFSET,
|
target->rela_dyn_section(layout),
|
target->rela_dyn_section(layout),
|
elfcpp::R_X86_64_TPOFF64);
|
elfcpp::R_X86_64_TPOFF64);
|
}
|
}
|
else if (optimized_type != tls::TLSOPT_TO_LE)
|
else if (optimized_type != tls::TLSOPT_TO_LE)
|
unsupported_reloc_global(object, r_type, gsym);
|
unsupported_reloc_global(object, r_type, gsym);
|
| Line 2681... |
Line 2788... |
gsym->demangled_name().c_str());
|
gsym->demangled_name().c_str());
|
break;
|
break;
|
}
|
}
|
}
|
}
|
|
|
|
template<int size>
|
void
|
void
|
Target_x86_64::gc_process_relocs(Symbol_table* symtab,
|
Target_x86_64<size>::gc_process_relocs(Symbol_table* symtab,
|
Layout* layout,
|
Layout* layout,
|
Sized_relobj_file<64, false>* object,
|
Sized_relobj_file<size, false>* object,
|
unsigned int data_shndx,
|
unsigned int data_shndx,
|
unsigned int sh_type,
|
unsigned int sh_type,
|
const unsigned char* prelocs,
|
const unsigned char* prelocs,
|
size_t reloc_count,
|
size_t reloc_count,
|
Output_section* output_section,
|
Output_section* output_section,
|
| Line 2700... |
Line 2808... |
if (sh_type == elfcpp::SHT_REL)
|
if (sh_type == elfcpp::SHT_REL)
|
{
|
{
|
return;
|
return;
|
}
|
}
|
|
|
gold::gc_process_relocs<64, false, Target_x86_64, elfcpp::SHT_RELA,
|
gold::gc_process_relocs<size, false, Target_x86_64<size>, elfcpp::SHT_RELA,
|
Target_x86_64::Scan,
|
typename Target_x86_64<size>::Scan,
|
Target_x86_64::Relocatable_size_for_reloc>(
|
typename Target_x86_64<size>::Relocatable_size_for_reloc>(
|
symtab,
|
symtab,
|
layout,
|
layout,
|
this,
|
this,
|
object,
|
object,
|
data_shndx,
|
data_shndx,
|
| Line 2718... |
Line 2826... |
plocal_symbols);
|
plocal_symbols);
|
|
|
}
|
}
|
// Scan relocations for a section.
|
// Scan relocations for a section.
|
|
|
|
template<int size>
|
void
|
void
|
Target_x86_64::scan_relocs(Symbol_table* symtab,
|
Target_x86_64<size>::scan_relocs(Symbol_table* symtab,
|
Layout* layout,
|
Layout* layout,
|
Sized_relobj_file<64, false>* object,
|
Sized_relobj_file<size, false>* object,
|
unsigned int data_shndx,
|
unsigned int data_shndx,
|
unsigned int sh_type,
|
unsigned int sh_type,
|
const unsigned char* prelocs,
|
const unsigned char* prelocs,
|
size_t reloc_count,
|
size_t reloc_count,
|
Output_section* output_section,
|
Output_section* output_section,
|
| Line 2738... |
Line 2847... |
gold_error(_("%s: unsupported REL reloc section"),
|
gold_error(_("%s: unsupported REL reloc section"),
|
object->name().c_str());
|
object->name().c_str());
|
return;
|
return;
|
}
|
}
|
|
|
gold::scan_relocs<64, false, Target_x86_64, elfcpp::SHT_RELA,
|
gold::scan_relocs<size, false, Target_x86_64<size>, elfcpp::SHT_RELA,
|
Target_x86_64::Scan>(
|
typename Target_x86_64<size>::Scan>(
|
symtab,
|
symtab,
|
layout,
|
layout,
|
this,
|
this,
|
object,
|
object,
|
data_shndx,
|
data_shndx,
|
| Line 2755... |
Line 2864... |
plocal_symbols);
|
plocal_symbols);
|
}
|
}
|
|
|
// Finalize the sections.
|
// Finalize the sections.
|
|
|
|
template<int size>
|
void
|
void
|
Target_x86_64::do_finalize_sections(
|
Target_x86_64<size>::do_finalize_sections(
|
Layout* layout,
|
Layout* layout,
|
const Input_objects*,
|
const Input_objects*,
|
Symbol_table* symtab)
|
Symbol_table* symtab)
|
{
|
{
|
const Reloc_section* rel_plt = (this->plt_ == NULL
|
const Reloc_section* rel_plt = (this->plt_ == NULL
|
| Line 2796... |
Line 2906... |
// the .got.plt section.
|
// the .got.plt section.
|
Symbol* sym = this->global_offset_table_;
|
Symbol* sym = this->global_offset_table_;
|
if (sym != NULL)
|
if (sym != NULL)
|
{
|
{
|
uint64_t data_size = this->got_plt_->current_data_size();
|
uint64_t data_size = this->got_plt_->current_data_size();
|
symtab->get_sized_symbol<64>(sym)->set_symsize(data_size);
|
symtab->get_sized_symbol<size>(sym)->set_symsize(data_size);
|
}
|
}
|
|
|
if (parameters->doing_static_link()
|
if (parameters->doing_static_link()
|
&& (this->plt_ == NULL || !this->plt_->has_irelative_section()))
|
&& (this->plt_ == NULL || !this->plt_->has_irelative_section()))
|
{
|
{
|
| Line 2843... |
Line 2953... |
}
|
}
|
}
|
}
|
|
|
// Perform a relocation.
|
// Perform a relocation.
|
|
|
|
template<int size>
|
inline bool
|
inline bool
|
Target_x86_64::Relocate::relocate(const Relocate_info<64, false>* relinfo,
|
Target_x86_64<size>::Relocate::relocate(
|
Target_x86_64* target,
|
const Relocate_info<size, false>* relinfo,
|
|
Target_x86_64<size>* target,
|
Output_section*,
|
Output_section*,
|
size_t relnum,
|
size_t relnum,
|
const elfcpp::Rela<64, false>& rela,
|
const elfcpp::Rela<size, false>& rela,
|
unsigned int r_type,
|
unsigned int r_type,
|
const Sized_symbol<64>* gsym,
|
const Sized_symbol<size>* gsym,
|
const Symbol_value<64>* psymval,
|
const Symbol_value<size>* psymval,
|
unsigned char* view,
|
unsigned char* view,
|
elfcpp::Elf_types<64>::Elf_Addr address,
|
typename elfcpp::Elf_types<size>::Elf_Addr address,
|
section_size_type view_size)
|
section_size_type view_size)
|
{
|
{
|
if (this->skip_call_tls_get_addr_)
|
if (this->skip_call_tls_get_addr_)
|
{
|
{
|
if ((r_type != elfcpp::R_X86_64_PLT32
|
if ((r_type != elfcpp::R_X86_64_PLT32
|
| Line 2873... |
Line 2985... |
this->skip_call_tls_get_addr_ = false;
|
this->skip_call_tls_get_addr_ = false;
|
return false;
|
return false;
|
}
|
}
|
}
|
}
|
|
|
const Sized_relobj_file<64, false>* object = relinfo->object;
|
const Sized_relobj_file<size, false>* object = relinfo->object;
|
|
|
// Pick the value to use for symbols defined in the PLT.
|
// Pick the value to use for symbols defined in the PLT.
|
Symbol_value<64> symval;
|
Symbol_value<size> symval;
|
if (gsym != NULL
|
if (gsym != NULL
|
&& gsym->use_plt_offset(Scan::get_reference_flags(r_type)))
|
&& gsym->use_plt_offset(Scan::get_reference_flags(r_type)))
|
{
|
{
|
symval.set_output_value(target->plt_address_for_global(gsym)
|
symval.set_output_value(target->plt_address_for_global(gsym)
|
+ gsym->plt_offset());
|
+ gsym->plt_offset());
|
psymval = &symval;
|
psymval = &symval;
|
}
|
}
|
else if (gsym == NULL && psymval->is_ifunc_symbol())
|
else if (gsym == NULL && psymval->is_ifunc_symbol())
|
{
|
{
|
unsigned int r_sym = elfcpp::elf_r_sym<64>(rela.get_r_info());
|
unsigned int r_sym = elfcpp::elf_r_sym<size>(rela.get_r_info());
|
if (object->local_has_plt_offset(r_sym))
|
if (object->local_has_plt_offset(r_sym))
|
{
|
{
|
symval.set_output_value(target->plt_address_for_local(object, r_sym)
|
symval.set_output_value(target->plt_address_for_local(object, r_sym)
|
+ object->local_plt_offset(r_sym));
|
+ object->local_plt_offset(r_sym));
|
psymval = &symval;
|
psymval = &symval;
|
| Line 2917... |
Line 3029... |
gold_assert(gsym->has_got_offset(GOT_TYPE_STANDARD));
|
gold_assert(gsym->has_got_offset(GOT_TYPE_STANDARD));
|
got_offset = gsym->got_offset(GOT_TYPE_STANDARD) - target->got_size();
|
got_offset = gsym->got_offset(GOT_TYPE_STANDARD) - target->got_size();
|
}
|
}
|
else
|
else
|
{
|
{
|
unsigned int r_sym = elfcpp::elf_r_sym<64>(rela.get_r_info());
|
unsigned int r_sym = elfcpp::elf_r_sym<size>(rela.get_r_info());
|
gold_assert(object->local_has_got_offset(r_sym, GOT_TYPE_STANDARD));
|
gold_assert(object->local_has_got_offset(r_sym, GOT_TYPE_STANDARD));
|
got_offset = (object->local_got_offset(r_sym, GOT_TYPE_STANDARD)
|
got_offset = (object->local_got_offset(r_sym, GOT_TYPE_STANDARD)
|
- target->got_size());
|
- target->got_size());
|
}
|
}
|
have_got_offset = true;
|
have_got_offset = true;
|
| Line 2937... |
Line 3049... |
case elfcpp::R_X86_64_GNU_VTINHERIT:
|
case elfcpp::R_X86_64_GNU_VTINHERIT:
|
case elfcpp::R_X86_64_GNU_VTENTRY:
|
case elfcpp::R_X86_64_GNU_VTENTRY:
|
break;
|
break;
|
|
|
case elfcpp::R_X86_64_64:
|
case elfcpp::R_X86_64_64:
|
Relocate_functions<64, false>::rela64(view, object, psymval, addend);
|
Relocate_functions<size, false>::rela64(view, object, psymval, addend);
|
break;
|
break;
|
|
|
case elfcpp::R_X86_64_PC64:
|
case elfcpp::R_X86_64_PC64:
|
Relocate_functions<64, false>::pcrela64(view, object, psymval, addend,
|
Relocate_functions<size, false>::pcrela64(view, object, psymval, addend,
|
address);
|
address);
|
break;
|
break;
|
|
|
case elfcpp::R_X86_64_32:
|
case elfcpp::R_X86_64_32:
|
// FIXME: we need to verify that value + addend fits into 32 bits:
|
// FIXME: we need to verify that value + addend fits into 32 bits:
|
// uint64_t x = value + addend;
|
// uint64_t x = value + addend;
|
// x == static_cast<uint64_t>(static_cast<uint32_t>(x))
|
// x == static_cast<uint64_t>(static_cast<uint32_t>(x))
|
// Likewise for other <=32-bit relocations (but see R_X86_64_32S).
|
// Likewise for other <=32-bit relocations (but see R_X86_64_32S).
|
Relocate_functions<64, false>::rela32(view, object, psymval, addend);
|
Relocate_functions<size, false>::rela32(view, object, psymval, addend);
|
break;
|
break;
|
|
|
case elfcpp::R_X86_64_32S:
|
case elfcpp::R_X86_64_32S:
|
// FIXME: we need to verify that value + addend fits into 32 bits:
|
// FIXME: we need to verify that value + addend fits into 32 bits:
|
// int64_t x = value + addend; // note this quantity is signed!
|
// int64_t x = value + addend; // note this quantity is signed!
|
// x == static_cast<int64_t>(static_cast<int32_t>(x))
|
// x == static_cast<int64_t>(static_cast<int32_t>(x))
|
Relocate_functions<64, false>::rela32(view, object, psymval, addend);
|
Relocate_functions<size, false>::rela32(view, object, psymval, addend);
|
break;
|
break;
|
|
|
case elfcpp::R_X86_64_PC32:
|
case elfcpp::R_X86_64_PC32:
|
Relocate_functions<64, false>::pcrela32(view, object, psymval, addend,
|
Relocate_functions<size, false>::pcrela32(view, object, psymval, addend,
|
address);
|
address);
|
break;
|
break;
|
|
|
case elfcpp::R_X86_64_16:
|
case elfcpp::R_X86_64_16:
|
Relocate_functions<64, false>::rela16(view, object, psymval, addend);
|
Relocate_functions<size, false>::rela16(view, object, psymval, addend);
|
break;
|
break;
|
|
|
case elfcpp::R_X86_64_PC16:
|
case elfcpp::R_X86_64_PC16:
|
Relocate_functions<64, false>::pcrela16(view, object, psymval, addend,
|
Relocate_functions<size, false>::pcrela16(view, object, psymval, addend,
|
address);
|
address);
|
break;
|
break;
|
|
|
case elfcpp::R_X86_64_8:
|
case elfcpp::R_X86_64_8:
|
Relocate_functions<64, false>::rela8(view, object, psymval, addend);
|
Relocate_functions<size, false>::rela8(view, object, psymval, addend);
|
break;
|
break;
|
|
|
case elfcpp::R_X86_64_PC8:
|
case elfcpp::R_X86_64_PC8:
|
Relocate_functions<64, false>::pcrela8(view, object, psymval, addend,
|
Relocate_functions<size, false>::pcrela8(view, object, psymval, addend,
|
address);
|
address);
|
break;
|
break;
|
|
|
case elfcpp::R_X86_64_PLT32:
|
case elfcpp::R_X86_64_PLT32:
|
gold_assert(gsym == NULL
|
gold_assert(gsym == NULL
|
| Line 2993... |
Line 3105... |
&& !gsym->is_from_dynobj()
|
&& !gsym->is_from_dynobj()
|
&& !gsym->is_preemptible()));
|
&& !gsym->is_preemptible()));
|
// Note: while this code looks the same as for R_X86_64_PC32, it
|
// Note: while this code looks the same as for R_X86_64_PC32, it
|
// behaves differently because psymval was set to point to
|
// behaves differently because psymval was set to point to
|
// the PLT entry, rather than the symbol, in Scan::global().
|
// the PLT entry, rather than the symbol, in Scan::global().
|
Relocate_functions<64, false>::pcrela32(view, object, psymval, addend,
|
Relocate_functions<size, false>::pcrela32(view, object, psymval, addend,
|
address);
|
address);
|
break;
|
break;
|
|
|
case elfcpp::R_X86_64_PLTOFF64:
|
case elfcpp::R_X86_64_PLTOFF64:
|
{
|
{
|
gold_assert(gsym);
|
gold_assert(gsym);
|
gold_assert(gsym->has_plt_offset()
|
gold_assert(gsym->has_plt_offset()
|
|| gsym->final_value_is_known());
|
|| gsym->final_value_is_known());
|
elfcpp::Elf_types<64>::Elf_Addr got_address;
|
typename elfcpp::Elf_types<size>::Elf_Addr got_address;
|
got_address = target->got_section(NULL, NULL)->address();
|
got_address = target->got_section(NULL, NULL)->address();
|
Relocate_functions<64, false>::rela64(view, object, psymval,
|
Relocate_functions<size, false>::rela64(view, object, psymval,
|
addend - got_address);
|
addend - got_address);
|
}
|
}
|
|
|
case elfcpp::R_X86_64_GOT32:
|
case elfcpp::R_X86_64_GOT32:
|
gold_assert(have_got_offset);
|
gold_assert(have_got_offset);
|
Relocate_functions<64, false>::rela32(view, got_offset, addend);
|
Relocate_functions<size, false>::rela32(view, got_offset, addend);
|
break;
|
break;
|
|
|
case elfcpp::R_X86_64_GOTPC32:
|
case elfcpp::R_X86_64_GOTPC32:
|
{
|
{
|
gold_assert(gsym);
|
gold_assert(gsym);
|
elfcpp::Elf_types<64>::Elf_Addr value;
|
typename elfcpp::Elf_types<size>::Elf_Addr value;
|
value = target->got_plt_section()->address();
|
value = target->got_plt_section()->address();
|
Relocate_functions<64, false>::pcrela32(view, value, addend, address);
|
Relocate_functions<size, false>::pcrela32(view, value, addend, address);
|
}
|
}
|
break;
|
break;
|
|
|
case elfcpp::R_X86_64_GOT64:
|
case elfcpp::R_X86_64_GOT64:
|
// The ABI doc says "Like GOT64, but indicates a PLT entry is needed."
|
// The ABI doc says "Like GOT64, but indicates a PLT entry is needed."
|
// Since we always add a PLT entry, this is equivalent.
|
// Since we always add a PLT entry, this is equivalent.
|
case elfcpp::R_X86_64_GOTPLT64:
|
case elfcpp::R_X86_64_GOTPLT64:
|
gold_assert(have_got_offset);
|
gold_assert(have_got_offset);
|
Relocate_functions<64, false>::rela64(view, got_offset, addend);
|
Relocate_functions<size, false>::rela64(view, got_offset, addend);
|
break;
|
break;
|
|
|
case elfcpp::R_X86_64_GOTPC64:
|
case elfcpp::R_X86_64_GOTPC64:
|
{
|
{
|
gold_assert(gsym);
|
gold_assert(gsym);
|
elfcpp::Elf_types<64>::Elf_Addr value;
|
typename elfcpp::Elf_types<size>::Elf_Addr value;
|
value = target->got_plt_section()->address();
|
value = target->got_plt_section()->address();
|
Relocate_functions<64, false>::pcrela64(view, value, addend, address);
|
Relocate_functions<size, false>::pcrela64(view, value, addend, address);
|
}
|
}
|
break;
|
break;
|
|
|
case elfcpp::R_X86_64_GOTOFF64:
|
case elfcpp::R_X86_64_GOTOFF64:
|
{
|
{
|
elfcpp::Elf_types<64>::Elf_Addr value;
|
typename elfcpp::Elf_types<size>::Elf_Addr value;
|
value = (psymval->value(object, 0)
|
value = (psymval->value(object, 0)
|
- target->got_plt_section()->address());
|
- target->got_plt_section()->address());
|
Relocate_functions<64, false>::rela64(view, value, addend);
|
Relocate_functions<size, false>::rela64(view, value, addend);
|
}
|
}
|
break;
|
break;
|
|
|
case elfcpp::R_X86_64_GOTPCREL:
|
case elfcpp::R_X86_64_GOTPCREL:
|
{
|
{
|
gold_assert(have_got_offset);
|
gold_assert(have_got_offset);
|
elfcpp::Elf_types<64>::Elf_Addr value;
|
typename elfcpp::Elf_types<size>::Elf_Addr value;
|
value = target->got_plt_section()->address() + got_offset;
|
value = target->got_plt_section()->address() + got_offset;
|
Relocate_functions<64, false>::pcrela32(view, value, addend, address);
|
Relocate_functions<size, false>::pcrela32(view, value, addend, address);
|
}
|
}
|
break;
|
break;
|
|
|
case elfcpp::R_X86_64_GOTPCREL64:
|
case elfcpp::R_X86_64_GOTPCREL64:
|
{
|
{
|
gold_assert(have_got_offset);
|
gold_assert(have_got_offset);
|
elfcpp::Elf_types<64>::Elf_Addr value;
|
typename elfcpp::Elf_types<size>::Elf_Addr value;
|
value = target->got_plt_section()->address() + got_offset;
|
value = target->got_plt_section()->address() + got_offset;
|
Relocate_functions<64, false>::pcrela64(view, value, addend, address);
|
Relocate_functions<size, false>::pcrela64(view, value, addend, address);
|
}
|
}
|
break;
|
break;
|
|
|
case elfcpp::R_X86_64_COPY:
|
case elfcpp::R_X86_64_COPY:
|
case elfcpp::R_X86_64_GLOB_DAT:
|
case elfcpp::R_X86_64_GLOB_DAT:
|
| Line 3107... |
Line 3219... |
return true;
|
return true;
|
}
|
}
|
|
|
// Perform a TLS relocation.
|
// Perform a TLS relocation.
|
|
|
|
template<int size>
|
inline void
|
inline void
|
Target_x86_64::Relocate::relocate_tls(const Relocate_info<64, false>* relinfo,
|
Target_x86_64<size>::Relocate::relocate_tls(
|
Target_x86_64* target,
|
const Relocate_info<size, false>* relinfo,
|
|
Target_x86_64<size>* target,
|
size_t relnum,
|
size_t relnum,
|
const elfcpp::Rela<64, false>& rela,
|
const elfcpp::Rela<size, false>& rela,
|
unsigned int r_type,
|
unsigned int r_type,
|
const Sized_symbol<64>* gsym,
|
const Sized_symbol<size>* gsym,
|
const Symbol_value<64>* psymval,
|
const Symbol_value<size>* psymval,
|
unsigned char* view,
|
unsigned char* view,
|
elfcpp::Elf_types<64>::Elf_Addr address,
|
typename elfcpp::Elf_types<size>::Elf_Addr address,
|
section_size_type view_size)
|
section_size_type view_size)
|
{
|
{
|
Output_segment* tls_segment = relinfo->layout->tls_segment();
|
Output_segment* tls_segment = relinfo->layout->tls_segment();
|
|
|
const Sized_relobj_file<64, false>* object = relinfo->object;
|
const Sized_relobj_file<size, false>* object = relinfo->object;
|
const elfcpp::Elf_Xword addend = rela.get_r_addend();
|
const elfcpp::Elf_Xword addend = rela.get_r_addend();
|
elfcpp::Shdr<64, false> data_shdr(relinfo->data_shdr);
|
elfcpp::Shdr<size, false> data_shdr(relinfo->data_shdr);
|
bool is_executable = (data_shdr.get_sh_flags() & elfcpp::SHF_EXECINSTR) != 0;
|
bool is_executable = (data_shdr.get_sh_flags() & elfcpp::SHF_EXECINSTR) != 0;
|
|
|
elfcpp::Elf_types<64>::Elf_Addr value = psymval->value(relinfo->object, 0);
|
typename elfcpp::Elf_types<size>::Elf_Addr value = psymval->value(relinfo->object, 0);
|
|
|
const bool is_final = (gsym == NULL
|
const bool is_final = (gsym == NULL
|
? !parameters->options().shared()
|
? !parameters->options().shared()
|
: gsym->final_value_is_known());
|
: gsym->final_value_is_known());
|
tls::Tls_optimization optimized_type
|
tls::Tls_optimization optimized_type
|
= Target_x86_64::optimize_tls_reloc(is_final, r_type);
|
= Target_x86_64<size>::optimize_tls_reloc(is_final, r_type);
|
switch (r_type)
|
switch (r_type)
|
{
|
{
|
case elfcpp::R_X86_64_TLSGD: // Global-dynamic
|
case elfcpp::R_X86_64_TLSGD: // Global-dynamic
|
if (!is_executable && optimized_type == tls::TLSOPT_TO_LE)
|
if (!is_executable && optimized_type == tls::TLSOPT_TO_LE)
|
{
|
{
|
| Line 3172... |
Line 3286... |
gold_assert(gsym->has_got_offset(got_type));
|
gold_assert(gsym->has_got_offset(got_type));
|
got_offset = gsym->got_offset(got_type) - target->got_size();
|
got_offset = gsym->got_offset(got_type) - target->got_size();
|
}
|
}
|
else
|
else
|
{
|
{
|
unsigned int r_sym = elfcpp::elf_r_sym<64>(rela.get_r_info());
|
unsigned int r_sym = elfcpp::elf_r_sym<size>(rela.get_r_info());
|
gold_assert(object->local_has_got_offset(r_sym, got_type));
|
gold_assert(object->local_has_got_offset(r_sym, got_type));
|
got_offset = (object->local_got_offset(r_sym, got_type)
|
got_offset = (object->local_got_offset(r_sym, got_type)
|
- target->got_size());
|
- target->got_size());
|
}
|
}
|
if (optimized_type == tls::TLSOPT_TO_IE)
|
if (optimized_type == tls::TLSOPT_TO_IE)
|
| Line 3189... |
Line 3303... |
else if (optimized_type == tls::TLSOPT_NONE)
|
else if (optimized_type == tls::TLSOPT_NONE)
|
{
|
{
|
// Relocate the field with the offset of the pair of GOT
|
// Relocate the field with the offset of the pair of GOT
|
// entries.
|
// entries.
|
value = target->got_plt_section()->address() + got_offset;
|
value = target->got_plt_section()->address() + got_offset;
|
Relocate_functions<64, false>::pcrela32(view, value, addend,
|
Relocate_functions<size, false>::pcrela32(view, value, addend,
|
address);
|
address);
|
break;
|
break;
|
}
|
}
|
}
|
}
|
gold_error_at_location(relinfo, relnum, rela.get_r_offset(),
|
gold_error_at_location(relinfo, relnum, rela.get_r_offset(),
|
| Line 3240... |
Line 3354... |
gold_assert(gsym->has_got_offset(got_type));
|
gold_assert(gsym->has_got_offset(got_type));
|
got_offset += gsym->got_offset(got_type) - target->got_size();
|
got_offset += gsym->got_offset(got_type) - target->got_size();
|
}
|
}
|
else
|
else
|
{
|
{
|
unsigned int r_sym = elfcpp::elf_r_sym<64>(rela.get_r_info());
|
unsigned int r_sym = elfcpp::elf_r_sym<size>(rela.get_r_info());
|
gold_assert(object->local_has_got_offset(r_sym, got_type));
|
gold_assert(object->local_has_got_offset(r_sym, got_type));
|
got_offset += (object->local_got_offset(r_sym, got_type)
|
got_offset += (object->local_got_offset(r_sym, got_type)
|
- target->got_size());
|
- target->got_size());
|
}
|
}
|
if (optimized_type == tls::TLSOPT_TO_IE)
|
if (optimized_type == tls::TLSOPT_TO_IE)
|
| Line 3266... |
Line 3380... |
if (r_type == elfcpp::R_X86_64_GOTPC32_TLSDESC)
|
if (r_type == elfcpp::R_X86_64_GOTPC32_TLSDESC)
|
{
|
{
|
// Relocate the field with the offset of the pair of GOT
|
// Relocate the field with the offset of the pair of GOT
|
// entries.
|
// entries.
|
value = target->got_plt_section()->address() + got_offset;
|
value = target->got_plt_section()->address() + got_offset;
|
Relocate_functions<64, false>::pcrela32(view, value, addend,
|
Relocate_functions<size, false>::pcrela32(view, value, addend,
|
address);
|
address);
|
}
|
}
|
break;
|
break;
|
}
|
}
|
}
|
}
|
| Line 3302... |
Line 3416... |
// the module index.
|
// the module index.
|
unsigned int got_offset;
|
unsigned int got_offset;
|
got_offset = (target->got_mod_index_entry(NULL, NULL, NULL)
|
got_offset = (target->got_mod_index_entry(NULL, NULL, NULL)
|
- target->got_size());
|
- target->got_size());
|
value = target->got_plt_section()->address() + got_offset;
|
value = target->got_plt_section()->address() + got_offset;
|
Relocate_functions<64, false>::pcrela32(view, value, addend,
|
Relocate_functions<size, false>::pcrela32(view, value, addend,
|
address);
|
address);
|
break;
|
break;
|
}
|
}
|
gold_error_at_location(relinfo, relnum, rela.get_r_offset(),
|
gold_error_at_location(relinfo, relnum, rela.get_r_offset(),
|
_("unsupported reloc %u"), r_type);
|
_("unsupported reloc %u"), r_type);
|
| Line 3327... |
Line 3441... |
|| issue_undefined_symbol_error(gsym));
|
|| issue_undefined_symbol_error(gsym));
|
return;
|
return;
|
}
|
}
|
value -= tls_segment->memsz();
|
value -= tls_segment->memsz();
|
}
|
}
|
Relocate_functions<64, false>::rela32(view, value, addend);
|
Relocate_functions<size, false>::rela32(view, value, addend);
|
break;
|
break;
|
|
|
case elfcpp::R_X86_64_DTPOFF64:
|
case elfcpp::R_X86_64_DTPOFF64:
|
// See R_X86_64_DTPOFF32, just above, for why we check for is_executable.
|
// See R_X86_64_DTPOFF32, just above, for why we check for is_executable.
|
if (optimized_type == tls::TLSOPT_TO_LE && is_executable)
|
if (optimized_type == tls::TLSOPT_TO_LE && is_executable)
|
| Line 3342... |
Line 3456... |
|| issue_undefined_symbol_error(gsym));
|
|| issue_undefined_symbol_error(gsym));
|
return;
|
return;
|
}
|
}
|
value -= tls_segment->memsz();
|
value -= tls_segment->memsz();
|
}
|
}
|
Relocate_functions<64, false>::rela64(view, value, addend);
|
Relocate_functions<size, false>::rela64(view, value, addend);
|
break;
|
break;
|
|
|
case elfcpp::R_X86_64_GOTTPOFF: // Initial-exec
|
case elfcpp::R_X86_64_GOTTPOFF: // Initial-exec
|
if (optimized_type == tls::TLSOPT_TO_LE)
|
if (optimized_type == tls::TLSOPT_TO_LE)
|
{
|
{
|
| Line 3354... |
Line 3468... |
{
|
{
|
gold_assert(parameters->errors()->error_count() > 0
|
gold_assert(parameters->errors()->error_count() > 0
|
|| issue_undefined_symbol_error(gsym));
|
|| issue_undefined_symbol_error(gsym));
|
return;
|
return;
|
}
|
}
|
Target_x86_64::Relocate::tls_ie_to_le(relinfo, relnum, tls_segment,
|
Target_x86_64<size>::Relocate::tls_ie_to_le(relinfo, relnum,
|
rela, r_type, value, view,
|
tls_segment, rela,
|
|
r_type, value, view,
|
view_size);
|
view_size);
|
break;
|
break;
|
}
|
}
|
else if (optimized_type == tls::TLSOPT_NONE)
|
else if (optimized_type == tls::TLSOPT_NONE)
|
{
|
{
|
| Line 3372... |
Line 3487... |
got_offset = (gsym->got_offset(GOT_TYPE_TLS_OFFSET)
|
got_offset = (gsym->got_offset(GOT_TYPE_TLS_OFFSET)
|
- target->got_size());
|
- target->got_size());
|
}
|
}
|
else
|
else
|
{
|
{
|
unsigned int r_sym = elfcpp::elf_r_sym<64>(rela.get_r_info());
|
unsigned int r_sym = elfcpp::elf_r_sym<size>(rela.get_r_info());
|
gold_assert(object->local_has_got_offset(r_sym,
|
gold_assert(object->local_has_got_offset(r_sym,
|
GOT_TYPE_TLS_OFFSET));
|
GOT_TYPE_TLS_OFFSET));
|
got_offset = (object->local_got_offset(r_sym, GOT_TYPE_TLS_OFFSET)
|
got_offset = (object->local_got_offset(r_sym, GOT_TYPE_TLS_OFFSET)
|
- target->got_size());
|
- target->got_size());
|
}
|
}
|
value = target->got_plt_section()->address() + got_offset;
|
value = target->got_plt_section()->address() + got_offset;
|
Relocate_functions<64, false>::pcrela32(view, value, addend, address);
|
Relocate_functions<size, false>::pcrela32(view, value, addend,
|
|
address);
|
break;
|
break;
|
}
|
}
|
gold_error_at_location(relinfo, relnum, rela.get_r_offset(),
|
gold_error_at_location(relinfo, relnum, rela.get_r_offset(),
|
_("unsupported reloc type %u"),
|
_("unsupported reloc type %u"),
|
r_type);
|
r_type);
|
| Line 3395... |
Line 3511... |
gold_assert(parameters->errors()->error_count() > 0
|
gold_assert(parameters->errors()->error_count() > 0
|
|| issue_undefined_symbol_error(gsym));
|
|| issue_undefined_symbol_error(gsym));
|
return;
|
return;
|
}
|
}
|
value -= tls_segment->memsz();
|
value -= tls_segment->memsz();
|
Relocate_functions<64, false>::rela32(view, value, addend);
|
Relocate_functions<size, false>::rela32(view, value, addend);
|
break;
|
break;
|
}
|
}
|
}
|
}
|
|
|
// Do a relocation in which we convert a TLS General-Dynamic to an
|
// Do a relocation in which we convert a TLS General-Dynamic to an
|
// Initial-Exec.
|
// Initial-Exec.
|
|
|
|
template<int size>
|
inline void
|
inline void
|
Target_x86_64::Relocate::tls_gd_to_ie(const Relocate_info<64, false>* relinfo,
|
Target_x86_64<size>::Relocate::tls_gd_to_ie(
|
|
const Relocate_info<size, false>* relinfo,
|
size_t relnum,
|
size_t relnum,
|
Output_segment*,
|
Output_segment*,
|
const elfcpp::Rela<64, false>& rela,
|
const elfcpp::Rela<size, false>& rela,
|
unsigned int,
|
unsigned int,
|
elfcpp::Elf_types<64>::Elf_Addr value,
|
typename elfcpp::Elf_types<size>::Elf_Addr value,
|
unsigned char* view,
|
unsigned char* view,
|
elfcpp::Elf_types<64>::Elf_Addr address,
|
typename elfcpp::Elf_types<size>::Elf_Addr address,
|
section_size_type view_size)
|
section_size_type view_size)
|
{
|
{
|
|
// For SIZE == 64:
|
// .byte 0x66; leaq foo@tlsgd(%rip),%rdi;
|
// .byte 0x66; leaq foo@tlsgd(%rip),%rdi;
|
// .word 0x6666; rex64; call __tls_get_addr
|
// .word 0x6666; rex64; call __tls_get_addr
|
// ==> movq %fs:0,%rax; addq x@gottpoff(%rip),%rax
|
// ==> movq %fs:0,%rax; addq x@gottpoff(%rip),%rax
|
|
// For SIZE == 32:
|
|
// leaq foo@tlsgd(%rip),%rdi;
|
|
// .word 0x6666; rex64; call __tls_get_addr
|
|
// ==> movl %fs:0,%eax; addq x@gottpoff(%rip),%rax
|
|
|
tls::check_range(relinfo, relnum, rela.get_r_offset(), view_size, -4);
|
|
tls::check_range(relinfo, relnum, rela.get_r_offset(), view_size, 12);
|
tls::check_range(relinfo, relnum, rela.get_r_offset(), view_size, 12);
|
|
tls::check_tls(relinfo, relnum, rela.get_r_offset(),
|
|
(memcmp(view + 4, "\x66\x66\x48\xe8", 4) == 0));
|
|
|
|
if (size == 64)
|
|
{
|
|
tls::check_range(relinfo, relnum, rela.get_r_offset(), view_size,
|
|
-4);
|
tls::check_tls(relinfo, relnum, rela.get_r_offset(),
|
tls::check_tls(relinfo, relnum, rela.get_r_offset(),
|
(memcmp(view - 4, "\x66\x48\x8d\x3d", 4) == 0));
|
(memcmp(view - 4, "\x66\x48\x8d\x3d", 4) == 0));
|
|
memcpy(view - 4, "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x03\x05\0\0\0\0",
|
|
16);
|
|
}
|
|
else
|
|
{
|
|
tls::check_range(relinfo, relnum, rela.get_r_offset(), view_size,
|
|
-3);
|
tls::check_tls(relinfo, relnum, rela.get_r_offset(),
|
tls::check_tls(relinfo, relnum, rela.get_r_offset(),
|
(memcmp(view + 4, "\x66\x66\x48\xe8", 4) == 0));
|
(memcmp(view - 3, "\x48\x8d\x3d", 3) == 0));
|
|
memcpy(view - 3, "\x64\x8b\x04\x25\0\0\0\0\x48\x03\x05\0\0\0\0",
|
memcpy(view - 4, "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x03\x05\0\0\0\0", 16);
|
15);
|
|
}
|
|
|
const elfcpp::Elf_Xword addend = rela.get_r_addend();
|
const elfcpp::Elf_Xword addend = rela.get_r_addend();
|
Relocate_functions<64, false>::pcrela32(view + 8, value, addend - 8, address);
|
Relocate_functions<size, false>::pcrela32(view + 8, value, addend - 8,
|
|
address);
|
|
|
// The next reloc should be a PLT32 reloc against __tls_get_addr.
|
// The next reloc should be a PLT32 reloc against __tls_get_addr.
|
// We can skip it.
|
// We can skip it.
|
this->skip_call_tls_get_addr_ = true;
|
this->skip_call_tls_get_addr_ = true;
|
}
|
}
|
|
|
// Do a relocation in which we convert a TLS General-Dynamic to a
|
// Do a relocation in which we convert a TLS General-Dynamic to a
|
// Local-Exec.
|
// Local-Exec.
|
|
|
|
template<int size>
|
inline void
|
inline void
|
Target_x86_64::Relocate::tls_gd_to_le(const Relocate_info<64, false>* relinfo,
|
Target_x86_64<size>::Relocate::tls_gd_to_le(
|
|
const Relocate_info<size, false>* relinfo,
|
size_t relnum,
|
size_t relnum,
|
Output_segment* tls_segment,
|
Output_segment* tls_segment,
|
const elfcpp::Rela<64, false>& rela,
|
const elfcpp::Rela<size, false>& rela,
|
unsigned int,
|
unsigned int,
|
elfcpp::Elf_types<64>::Elf_Addr value,
|
typename elfcpp::Elf_types<size>::Elf_Addr value,
|
unsigned char* view,
|
unsigned char* view,
|
section_size_type view_size)
|
section_size_type view_size)
|
{
|
{
|
|
// For SIZE == 64:
|
// .byte 0x66; leaq foo@tlsgd(%rip),%rdi;
|
// .byte 0x66; leaq foo@tlsgd(%rip),%rdi;
|
// .word 0x6666; rex64; call __tls_get_addr
|
// .word 0x6666; rex64; call __tls_get_addr
|
// ==> movq %fs:0,%rax; leaq x@tpoff(%rax),%rax
|
// ==> movq %fs:0,%rax; leaq x@tpoff(%rax),%rax
|
|
// For SIZE == 32:
|
|
// leaq foo@tlsgd(%rip),%rdi;
|
|
// .word 0x6666; rex64; call __tls_get_addr
|
|
// ==> movl %fs:0,%eax; leaq x@tpoff(%rax),%rax
|
|
|
tls::check_range(relinfo, relnum, rela.get_r_offset(), view_size, -4);
|
|
tls::check_range(relinfo, relnum, rela.get_r_offset(), view_size, 12);
|
tls::check_range(relinfo, relnum, rela.get_r_offset(), view_size, 12);
|
|
tls::check_tls(relinfo, relnum, rela.get_r_offset(),
|
|
(memcmp(view + 4, "\x66\x66\x48\xe8", 4) == 0));
|
|
|
|
if (size == 64)
|
|
{
|
|
tls::check_range(relinfo, relnum, rela.get_r_offset(), view_size,
|
|
-4);
|
tls::check_tls(relinfo, relnum, rela.get_r_offset(),
|
tls::check_tls(relinfo, relnum, rela.get_r_offset(),
|
(memcmp(view - 4, "\x66\x48\x8d\x3d", 4) == 0));
|
(memcmp(view - 4, "\x66\x48\x8d\x3d", 4) == 0));
|
|
memcpy(view - 4, "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x8d\x80\0\0\0\0",
|
|
16);
|
|
}
|
|
else
|
|
{
|
|
tls::check_range(relinfo, relnum, rela.get_r_offset(), view_size,
|
|
-3);
|
tls::check_tls(relinfo, relnum, rela.get_r_offset(),
|
tls::check_tls(relinfo, relnum, rela.get_r_offset(),
|
(memcmp(view + 4, "\x66\x66\x48\xe8", 4) == 0));
|
(memcmp(view - 3, "\x48\x8d\x3d", 3) == 0));
|
|
|
memcpy(view - 4, "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x8d\x80\0\0\0\0", 16);
|
memcpy(view - 3, "\x64\x8b\x04\x25\0\0\0\0\x48\x8d\x80\0\0\0\0",
|
|
15);
|
|
}
|
|
|
value -= tls_segment->memsz();
|
value -= tls_segment->memsz();
|
Relocate_functions<64, false>::rela32(view + 8, value, 0);
|
Relocate_functions<size, false>::rela32(view + 8, value, 0);
|
|
|
// The next reloc should be a PLT32 reloc against __tls_get_addr.
|
// The next reloc should be a PLT32 reloc against __tls_get_addr.
|
// We can skip it.
|
// We can skip it.
|
this->skip_call_tls_get_addr_ = true;
|
this->skip_call_tls_get_addr_ = true;
|
}
|
}
|
|
|
// Do a TLSDESC-style General-Dynamic to Initial-Exec transition.
|
// Do a TLSDESC-style General-Dynamic to Initial-Exec transition.
|
|
|
|
template<int size>
|
inline void
|
inline void
|
Target_x86_64::Relocate::tls_desc_gd_to_ie(
|
Target_x86_64<size>::Relocate::tls_desc_gd_to_ie(
|
const Relocate_info<64, false>* relinfo,
|
const Relocate_info<size, false>* relinfo,
|
size_t relnum,
|
size_t relnum,
|
Output_segment*,
|
Output_segment*,
|
const elfcpp::Rela<64, false>& rela,
|
const elfcpp::Rela<size, false>& rela,
|
unsigned int r_type,
|
unsigned int r_type,
|
elfcpp::Elf_types<64>::Elf_Addr value,
|
typename elfcpp::Elf_types<size>::Elf_Addr value,
|
unsigned char* view,
|
unsigned char* view,
|
elfcpp::Elf_types<64>::Elf_Addr address,
|
typename elfcpp::Elf_types<size>::Elf_Addr address,
|
section_size_type view_size)
|
section_size_type view_size)
|
{
|
{
|
if (r_type == elfcpp::R_X86_64_GOTPC32_TLSDESC)
|
if (r_type == elfcpp::R_X86_64_GOTPC32_TLSDESC)
|
{
|
{
|
// leaq foo@tlsdesc(%rip), %rax
|
// leaq foo@tlsdesc(%rip), %rax
|
| Line 3495... |
Line 3654... |
tls::check_range(relinfo, relnum, rela.get_r_offset(), view_size, 4);
|
tls::check_range(relinfo, relnum, rela.get_r_offset(), view_size, 4);
|
tls::check_tls(relinfo, relnum, rela.get_r_offset(),
|
tls::check_tls(relinfo, relnum, rela.get_r_offset(),
|
view[-3] == 0x48 && view[-2] == 0x8d && view[-1] == 0x05);
|
view[-3] == 0x48 && view[-2] == 0x8d && view[-1] == 0x05);
|
view[-2] = 0x8b;
|
view[-2] = 0x8b;
|
const elfcpp::Elf_Xword addend = rela.get_r_addend();
|
const elfcpp::Elf_Xword addend = rela.get_r_addend();
|
Relocate_functions<64, false>::pcrela32(view, value, addend, address);
|
Relocate_functions<size, false>::pcrela32(view, value, addend, address);
|
}
|
}
|
else
|
else
|
{
|
{
|
// call *foo@tlscall(%rax)
|
// call *foo@tlscall(%rax)
|
// ==> nop; nop
|
// ==> nop; nop
|
| Line 3512... |
Line 3671... |
}
|
}
|
}
|
}
|
|
|
// Do a TLSDESC-style General-Dynamic to Local-Exec transition.
|
// Do a TLSDESC-style General-Dynamic to Local-Exec transition.
|
|
|
|
template<int size>
|
inline void
|
inline void
|
Target_x86_64::Relocate::tls_desc_gd_to_le(
|
Target_x86_64<size>::Relocate::tls_desc_gd_to_le(
|
const Relocate_info<64, false>* relinfo,
|
const Relocate_info<size, false>* relinfo,
|
size_t relnum,
|
size_t relnum,
|
Output_segment* tls_segment,
|
Output_segment* tls_segment,
|
const elfcpp::Rela<64, false>& rela,
|
const elfcpp::Rela<size, false>& rela,
|
unsigned int r_type,
|
unsigned int r_type,
|
elfcpp::Elf_types<64>::Elf_Addr value,
|
typename elfcpp::Elf_types<size>::Elf_Addr value,
|
unsigned char* view,
|
unsigned char* view,
|
section_size_type view_size)
|
section_size_type view_size)
|
{
|
{
|
if (r_type == elfcpp::R_X86_64_GOTPC32_TLSDESC)
|
if (r_type == elfcpp::R_X86_64_GOTPC32_TLSDESC)
|
{
|
{
|
| Line 3534... |
Line 3694... |
tls::check_tls(relinfo, relnum, rela.get_r_offset(),
|
tls::check_tls(relinfo, relnum, rela.get_r_offset(),
|
view[-3] == 0x48 && view[-2] == 0x8d && view[-1] == 0x05);
|
view[-3] == 0x48 && view[-2] == 0x8d && view[-1] == 0x05);
|
view[-2] = 0xc7;
|
view[-2] = 0xc7;
|
view[-1] = 0xc0;
|
view[-1] = 0xc0;
|
value -= tls_segment->memsz();
|
value -= tls_segment->memsz();
|
Relocate_functions<64, false>::rela32(view, value, 0);
|
Relocate_functions<size, false>::rela32(view, value, 0);
|
}
|
}
|
else
|
else
|
{
|
{
|
// call *foo@tlscall(%rax)
|
// call *foo@tlscall(%rax)
|
// ==> nop; nop
|
// ==> nop; nop
|
| Line 3549... |
Line 3709... |
view[0] = 0x66;
|
view[0] = 0x66;
|
view[1] = 0x90;
|
view[1] = 0x90;
|
}
|
}
|
}
|
}
|
|
|
|
template<int size>
|
inline void
|
inline void
|
Target_x86_64::Relocate::tls_ld_to_le(const Relocate_info<64, false>* relinfo,
|
Target_x86_64<size>::Relocate::tls_ld_to_le(
|
|
const Relocate_info<size, false>* relinfo,
|
size_t relnum,
|
size_t relnum,
|
Output_segment*,
|
Output_segment*,
|
const elfcpp::Rela<64, false>& rela,
|
const elfcpp::Rela<size, false>& rela,
|
unsigned int,
|
unsigned int,
|
elfcpp::Elf_types<64>::Elf_Addr,
|
typename elfcpp::Elf_types<size>::Elf_Addr,
|
unsigned char* view,
|
unsigned char* view,
|
section_size_type view_size)
|
section_size_type view_size)
|
{
|
{
|
// leaq foo@tlsld(%rip),%rdi; call __tls_get_addr@plt;
|
// leaq foo@tlsld(%rip),%rdi; call __tls_get_addr@plt;
|
// ... leq foo@dtpoff(%rax),%reg
|
// ... leq foo@dtpoff(%rax),%reg
|
| Line 3581... |
Line 3743... |
}
|
}
|
|
|
// Do a relocation in which we convert a TLS Initial-Exec to a
|
// Do a relocation in which we convert a TLS Initial-Exec to a
|
// Local-Exec.
|
// Local-Exec.
|
|
|
|
template<int size>
|
inline void
|
inline void
|
Target_x86_64::Relocate::tls_ie_to_le(const Relocate_info<64, false>* relinfo,
|
Target_x86_64<size>::Relocate::tls_ie_to_le(
|
|
const Relocate_info<size, false>* relinfo,
|
size_t relnum,
|
size_t relnum,
|
Output_segment* tls_segment,
|
Output_segment* tls_segment,
|
const elfcpp::Rela<64, false>& rela,
|
const elfcpp::Rela<size, false>& rela,
|
unsigned int,
|
unsigned int,
|
elfcpp::Elf_types<64>::Elf_Addr value,
|
typename elfcpp::Elf_types<size>::Elf_Addr value,
|
unsigned char* view,
|
unsigned char* view,
|
section_size_type view_size)
|
section_size_type view_size)
|
{
|
{
|
// We need to examine the opcodes to figure out which instruction we
|
// We need to examine the opcodes to figure out which instruction we
|
// are looking at.
|
// are looking at.
|
| Line 3631... |
Line 3795... |
view[-2] = 0x8d;
|
view[-2] = 0x8d;
|
view[-1] = 0x80 | reg | (reg << 3);
|
view[-1] = 0x80 | reg | (reg << 3);
|
}
|
}
|
|
|
value -= tls_segment->memsz();
|
value -= tls_segment->memsz();
|
Relocate_functions<64, false>::rela32(view, value, 0);
|
Relocate_functions<size, false>::rela32(view, value, 0);
|
}
|
}
|
|
|
// Relocate section data.
|
// Relocate section data.
|
|
|
|
template<int size>
|
void
|
void
|
Target_x86_64::relocate_section(
|
Target_x86_64<size>::relocate_section(
|
const Relocate_info<64, false>* relinfo,
|
const Relocate_info<size, false>* relinfo,
|
unsigned int sh_type,
|
unsigned int sh_type,
|
const unsigned char* prelocs,
|
const unsigned char* prelocs,
|
size_t reloc_count,
|
size_t reloc_count,
|
Output_section* output_section,
|
Output_section* output_section,
|
bool needs_special_offset_handling,
|
bool needs_special_offset_handling,
|
unsigned char* view,
|
unsigned char* view,
|
elfcpp::Elf_types<64>::Elf_Addr address,
|
typename elfcpp::Elf_types<size>::Elf_Addr address,
|
section_size_type view_size,
|
section_size_type view_size,
|
const Reloc_symbol_changes* reloc_symbol_changes)
|
const Reloc_symbol_changes* reloc_symbol_changes)
|
{
|
{
|
gold_assert(sh_type == elfcpp::SHT_RELA);
|
gold_assert(sh_type == elfcpp::SHT_RELA);
|
|
|
gold::relocate_section<64, false, Target_x86_64, elfcpp::SHT_RELA,
|
gold::relocate_section<size, false, Target_x86_64<size>, elfcpp::SHT_RELA,
|
Target_x86_64::Relocate>(
|
typename Target_x86_64<size>::Relocate>(
|
relinfo,
|
relinfo,
|
this,
|
this,
|
prelocs,
|
prelocs,
|
reloc_count,
|
reloc_count,
|
output_section,
|
output_section,
|
| Line 3668... |
Line 3833... |
}
|
}
|
|
|
// Apply an incremental relocation. Incremental relocations always refer
|
// Apply an incremental relocation. Incremental relocations always refer
|
// to global symbols.
|
// to global symbols.
|
|
|
|
template<int size>
|
void
|
void
|
Target_x86_64::apply_relocation(
|
Target_x86_64<size>::apply_relocation(
|
const Relocate_info<64, false>* relinfo,
|
const Relocate_info<size, false>* relinfo,
|
elfcpp::Elf_types<64>::Elf_Addr r_offset,
|
typename elfcpp::Elf_types<size>::Elf_Addr r_offset,
|
unsigned int r_type,
|
unsigned int r_type,
|
elfcpp::Elf_types<64>::Elf_Swxword r_addend,
|
typename elfcpp::Elf_types<size>::Elf_Swxword r_addend,
|
const Symbol* gsym,
|
const Symbol* gsym,
|
unsigned char* view,
|
unsigned char* view,
|
elfcpp::Elf_types<64>::Elf_Addr address,
|
typename elfcpp::Elf_types<size>::Elf_Addr address,
|
section_size_type view_size)
|
section_size_type view_size)
|
{
|
{
|
gold::apply_relocation<64, false, Target_x86_64, Target_x86_64::Relocate>(
|
gold::apply_relocation<size, false, Target_x86_64<size>,
|
|
typename Target_x86_64<size>::Relocate>(
|
relinfo,
|
relinfo,
|
this,
|
this,
|
r_offset,
|
r_offset,
|
r_type,
|
r_type,
|
r_addend,
|
r_addend,
|
| Line 3694... |
Line 3861... |
}
|
}
|
|
|
// Return the size of a relocation while scanning during a relocatable
|
// Return the size of a relocation while scanning during a relocatable
|
// link.
|
// link.
|
|
|
|
template<int size>
|
unsigned int
|
unsigned int
|
Target_x86_64::Relocatable_size_for_reloc::get_size_for_reloc(
|
Target_x86_64<size>::Relocatable_size_for_reloc::get_size_for_reloc(
|
unsigned int r_type,
|
unsigned int r_type,
|
Relobj* object)
|
Relobj* object)
|
{
|
{
|
switch (r_type)
|
switch (r_type)
|
{
|
{
|
| Line 3763... |
Line 3931... |
}
|
}
|
}
|
}
|
|
|
// Scan the relocs during a relocatable link.
|
// Scan the relocs during a relocatable link.
|
|
|
|
template<int size>
|
void
|
void
|
Target_x86_64::scan_relocatable_relocs(Symbol_table* symtab,
|
Target_x86_64<size>::scan_relocatable_relocs(
|
|
Symbol_table* symtab,
|
Layout* layout,
|
Layout* layout,
|
Sized_relobj_file<64, false>* object,
|
Sized_relobj_file<size, false>* object,
|
unsigned int data_shndx,
|
unsigned int data_shndx,
|
unsigned int sh_type,
|
unsigned int sh_type,
|
const unsigned char* prelocs,
|
const unsigned char* prelocs,
|
size_t reloc_count,
|
size_t reloc_count,
|
Output_section* output_section,
|
Output_section* output_section,
|
| Line 3782... |
Line 3952... |
gold_assert(sh_type == elfcpp::SHT_RELA);
|
gold_assert(sh_type == elfcpp::SHT_RELA);
|
|
|
typedef gold::Default_scan_relocatable_relocs<elfcpp::SHT_RELA,
|
typedef gold::Default_scan_relocatable_relocs<elfcpp::SHT_RELA,
|
Relocatable_size_for_reloc> Scan_relocatable_relocs;
|
Relocatable_size_for_reloc> Scan_relocatable_relocs;
|
|
|
gold::scan_relocatable_relocs<64, false, elfcpp::SHT_RELA,
|
gold::scan_relocatable_relocs<size, false, elfcpp::SHT_RELA,
|
Scan_relocatable_relocs>(
|
Scan_relocatable_relocs>(
|
symtab,
|
symtab,
|
layout,
|
layout,
|
object,
|
object,
|
data_shndx,
|
data_shndx,
|
| Line 3799... |
Line 3969... |
rr);
|
rr);
|
}
|
}
|
|
|
// Relocate a section during a relocatable link.
|
// Relocate a section during a relocatable link.
|
|
|
|
template<int size>
|
void
|
void
|
Target_x86_64::relocate_for_relocatable(
|
Target_x86_64<size>::relocate_for_relocatable(
|
const Relocate_info<64, false>* relinfo,
|
const Relocate_info<size, false>* relinfo,
|
unsigned int sh_type,
|
unsigned int sh_type,
|
const unsigned char* prelocs,
|
const unsigned char* prelocs,
|
size_t reloc_count,
|
size_t reloc_count,
|
Output_section* output_section,
|
Output_section* output_section,
|
off_t offset_in_output_section,
|
off_t offset_in_output_section,
|
const Relocatable_relocs* rr,
|
const Relocatable_relocs* rr,
|
unsigned char* view,
|
unsigned char* view,
|
elfcpp::Elf_types<64>::Elf_Addr view_address,
|
typename elfcpp::Elf_types<size>::Elf_Addr view_address,
|
section_size_type view_size,
|
section_size_type view_size,
|
unsigned char* reloc_view,
|
unsigned char* reloc_view,
|
section_size_type reloc_view_size)
|
section_size_type reloc_view_size)
|
{
|
{
|
gold_assert(sh_type == elfcpp::SHT_RELA);
|
gold_assert(sh_type == elfcpp::SHT_RELA);
|
|
|
gold::relocate_for_relocatable<64, false, elfcpp::SHT_RELA>(
|
gold::relocate_for_relocatable<size, false, elfcpp::SHT_RELA>(
|
relinfo,
|
relinfo,
|
prelocs,
|
prelocs,
|
reloc_count,
|
reloc_count,
|
output_section,
|
output_section,
|
offset_in_output_section,
|
offset_in_output_section,
|
| Line 3835... |
Line 4006... |
// Return the value to use for a dynamic which requires special
|
// Return the value to use for a dynamic which requires special
|
// treatment. This is how we support equality comparisons of function
|
// treatment. This is how we support equality comparisons of function
|
// pointers across shared library boundaries, as described in the
|
// pointers across shared library boundaries, as described in the
|
// processor specific ABI supplement.
|
// processor specific ABI supplement.
|
|
|
|
template<int size>
|
uint64_t
|
uint64_t
|
Target_x86_64::do_dynsym_value(const Symbol* gsym) const
|
Target_x86_64<size>::do_dynsym_value(const Symbol* gsym) const
|
{
|
{
|
gold_assert(gsym->is_from_dynobj() && gsym->has_plt_offset());
|
gold_assert(gsym->is_from_dynobj() && gsym->has_plt_offset());
|
return this->plt_address_for_global(gsym) + gsym->plt_offset();
|
return this->plt_address_for_global(gsym) + gsym->plt_offset();
|
}
|
}
|
|
|
// Return a string used to fill a code section with nops to take up
|
// Return a string used to fill a code section with nops to take up
|
// the specified length.
|
// the specified length.
|
|
|
|
template<int size>
|
std::string
|
std::string
|
Target_x86_64::do_code_fill(section_size_type length) const
|
Target_x86_64<size>::do_code_fill(section_size_type length) const
|
{
|
{
|
if (length >= 16)
|
if (length >= 16)
|
{
|
{
|
// Build a jmpq instruction to skip over the bytes.
|
// Build a jmpq instruction to skip over the bytes.
|
unsigned char jmp[5];
|
unsigned char jmp[5];
|
jmp[0] = 0xe9;
|
jmp[0] = 0xe9;
|
elfcpp::Swap_unaligned<32, false>::writeval(jmp + 1, length - 5);
|
elfcpp::Swap_unaligned<32, false>::writeval(jmp + 1, length - 5);
|
return (std::string(reinterpret_cast<char*>(&jmp[0]), 5)
|
return (std::string(reinterpret_cast<char*>(&jmp[0]), 5)
|
+ std::string(length - 5, '\0'));
|
+ std::string(length - 5, static_cast<char>(0x90)));
|
}
|
}
|
|
|
// Nop sequences of various lengths.
|
// Nop sequences of various lengths.
|
const char nop1[1] = { 0x90 }; // nop
|
const char nop1[1] = { '\x90' }; // nop
|
const char nop2[2] = { 0x66, 0x90 }; // xchg %ax %ax
|
const char nop2[2] = { '\x66', '\x90' }; // xchg %ax %ax
|
const char nop3[3] = { 0x0f, 0x1f, 0x00 }; // nop (%rax)
|
const char nop3[3] = { '\x0f', '\x1f', '\x00' }; // nop (%rax)
|
const char nop4[4] = { 0x0f, 0x1f, 0x40, 0x00}; // nop 0(%rax)
|
const char nop4[4] = { '\x0f', '\x1f', '\x40', // nop 0(%rax)
|
const char nop5[5] = { 0x0f, 0x1f, 0x44, 0x00, // nop 0(%rax,%rax,1)
|
'\x00'};
|
0x00 };
|
const char nop5[5] = { '\x0f', '\x1f', '\x44', // nop 0(%rax,%rax,1)
|
const char nop6[6] = { 0x66, 0x0f, 0x1f, 0x44, // nopw 0(%rax,%rax,1)
|
'\x00', '\x00' };
|
0x00, 0x00 };
|
const char nop6[6] = { '\x66', '\x0f', '\x1f', // nopw 0(%rax,%rax,1)
|
const char nop7[7] = { 0x0f, 0x1f, 0x80, 0x00, // nopl 0L(%rax)
|
'\x44', '\x00', '\x00' };
|
0x00, 0x00, 0x00 };
|
const char nop7[7] = { '\x0f', '\x1f', '\x80', // nopl 0L(%rax)
|
const char nop8[8] = { 0x0f, 0x1f, 0x84, 0x00, // nopl 0L(%rax,%rax,1)
|
'\x00', '\x00', '\x00',
|
0x00, 0x00, 0x00, 0x00 };
|
'\x00' };
|
const char nop9[9] = { 0x66, 0x0f, 0x1f, 0x84, // nopw 0L(%rax,%rax,1)
|
const char nop8[8] = { '\x0f', '\x1f', '\x84', // nopl 0L(%rax,%rax,1)
|
0x00, 0x00, 0x00, 0x00,
|
'\x00', '\x00', '\x00',
|
0x00 };
|
'\x00', '\x00' };
|
const char nop10[10] = { 0x66, 0x2e, 0x0f, 0x1f, // nopw %cs:0L(%rax,%rax,1)
|
const char nop9[9] = { '\x66', '\x0f', '\x1f', // nopw 0L(%rax,%rax,1)
|
0x84, 0x00, 0x00, 0x00,
|
'\x84', '\x00', '\x00',
|
0x00, 0x00 };
|
'\x00', '\x00', '\x00' };
|
const char nop11[11] = { 0x66, 0x66, 0x2e, 0x0f, // data16
|
const char nop10[10] = { '\x66', '\x2e', '\x0f', // nopw %cs:0L(%rax,%rax,1)
|
0x1f, 0x84, 0x00, 0x00, // nopw %cs:0L(%rax,%rax,1)
|
'\x1f', '\x84', '\x00',
|
0x00, 0x00, 0x00 };
|
'\x00', '\x00', '\x00',
|
const char nop12[12] = { 0x66, 0x66, 0x66, 0x2e, // data16; data16
|
'\x00' };
|
0x0f, 0x1f, 0x84, 0x00, // nopw %cs:0L(%rax,%rax,1)
|
const char nop11[11] = { '\x66', '\x66', '\x2e', // data16
|
0x00, 0x00, 0x00, 0x00 };
|
'\x0f', '\x1f', '\x84', // nopw %cs:0L(%rax,%rax,1)
|
const char nop13[13] = { 0x66, 0x66, 0x66, 0x66, // data16; data16; data16
|
'\x00', '\x00', '\x00',
|
0x2e, 0x0f, 0x1f, 0x84, // nopw %cs:0L(%rax,%rax,1)
|
'\x00', '\x00' };
|
0x00, 0x00, 0x00, 0x00,
|
const char nop12[12] = { '\x66', '\x66', '\x66', // data16; data16
|
0x00 };
|
'\x2e', '\x0f', '\x1f', // nopw %cs:0L(%rax,%rax,1)
|
const char nop14[14] = { 0x66, 0x66, 0x66, 0x66, // data16; data16; data16
|
'\x84', '\x00', '\x00',
|
0x66, 0x2e, 0x0f, 0x1f, // data16
|
'\x00', '\x00', '\x00' };
|
0x84, 0x00, 0x00, 0x00, // nopw %cs:0L(%rax,%rax,1)
|
const char nop13[13] = { '\x66', '\x66', '\x66', // data16; data16; data16
|
0x00, 0x00 };
|
'\x66', '\x2e', '\x0f', // nopw %cs:0L(%rax,%rax,1)
|
const char nop15[15] = { 0x66, 0x66, 0x66, 0x66, // data16; data16; data16
|
'\x1f', '\x84', '\x00',
|
0x66, 0x66, 0x2e, 0x0f, // data16; data16
|
'\x00', '\x00', '\x00',
|
0x1f, 0x84, 0x00, 0x00, // nopw %cs:0L(%rax,%rax,1)
|
'\x00' };
|
0x00, 0x00, 0x00 };
|
const char nop14[14] = { '\x66', '\x66', '\x66', // data16; data16; data16
|
|
'\x66', '\x66', '\x2e', // data16
|
|
'\x0f', '\x1f', '\x84', // nopw %cs:0L(%rax,%rax,1)
|
|
'\x00', '\x00', '\x00',
|
|
'\x00', '\x00' };
|
|
const char nop15[15] = { '\x66', '\x66', '\x66', // data16; data16; data16
|
|
'\x66', '\x66', '\x66', // data16; data16
|
|
'\x2e', '\x0f', '\x1f', // nopw %cs:0L(%rax,%rax,1)
|
|
'\x84', '\x00', '\x00',
|
|
'\x00', '\x00', '\x00' };
|
|
|
const char* nops[16] = {
|
const char* nops[16] = {
|
NULL,
|
NULL,
|
nop1, nop2, nop3, nop4, nop5, nop6, nop7,
|
nop1, nop2, nop3, nop4, nop5, nop6, nop7,
|
nop8, nop9, nop10, nop11, nop12, nop13, nop14, nop15
|
nop8, nop9, nop10, nop11, nop12, nop13, nop14, nop15
|
| Line 3910... |
Line 4092... |
// Return the addend to use for a target specific relocation. The
|
// Return the addend to use for a target specific relocation. The
|
// only target specific relocation is R_X86_64_TLSDESC for a local
|
// only target specific relocation is R_X86_64_TLSDESC for a local
|
// symbol. We want to set the addend is the offset of the local
|
// symbol. We want to set the addend is the offset of the local
|
// symbol in the TLS segment.
|
// symbol in the TLS segment.
|
|
|
|
template<int size>
|
uint64_t
|
uint64_t
|
Target_x86_64::do_reloc_addend(void* arg, unsigned int r_type,
|
Target_x86_64<size>::do_reloc_addend(void* arg, unsigned int r_type,
|
uint64_t) const
|
uint64_t) const
|
{
|
{
|
gold_assert(r_type == elfcpp::R_X86_64_TLSDESC);
|
gold_assert(r_type == elfcpp::R_X86_64_TLSDESC);
|
uintptr_t intarg = reinterpret_cast<uintptr_t>(arg);
|
uintptr_t intarg = reinterpret_cast<uintptr_t>(arg);
|
gold_assert(intarg < this->tlsdesc_reloc_info_.size());
|
gold_assert(intarg < this->tlsdesc_reloc_info_.size());
|
const Tlsdesc_info& ti(this->tlsdesc_reloc_info_[intarg]);
|
const Tlsdesc_info& ti(this->tlsdesc_reloc_info_[intarg]);
|
const Symbol_value<64>* psymval = ti.object->local_symbol(ti.r_sym);
|
const Symbol_value<size>* psymval = ti.object->local_symbol(ti.r_sym);
|
gold_assert(psymval->is_tls_symbol());
|
gold_assert(psymval->is_tls_symbol());
|
// The value of a TLS symbol is the offset in the TLS segment.
|
// The value of a TLS symbol is the offset in the TLS segment.
|
return psymval->value(ti.object, 0);
|
return psymval->value(ti.object, 0);
|
}
|
}
|
|
|
| Line 3930... |
Line 4113... |
// in an FDE. Solaris and SVR4 use DW_EH_PE_datarel because their
|
// in an FDE. Solaris and SVR4 use DW_EH_PE_datarel because their
|
// assembler can not write out the difference between two labels in
|
// assembler can not write out the difference between two labels in
|
// different sections, so instead of using a pc-relative value they
|
// different sections, so instead of using a pc-relative value they
|
// use an offset from the GOT.
|
// use an offset from the GOT.
|
|
|
|
template<int size>
|
uint64_t
|
uint64_t
|
Target_x86_64::do_ehframe_datarel_base() const
|
Target_x86_64<size>::do_ehframe_datarel_base() const
|
{
|
{
|
gold_assert(this->global_offset_table_ != NULL);
|
gold_assert(this->global_offset_table_ != NULL);
|
Symbol* sym = this->global_offset_table_;
|
Symbol* sym = this->global_offset_table_;
|
Sized_symbol<64>* ssym = static_cast<Sized_symbol<64>*>(sym);
|
Sized_symbol<size>* ssym = static_cast<Sized_symbol<size>*>(sym);
|
return ssym->value();
|
return ssym->value();
|
}
|
}
|
|
|
// FNOFFSET in section SHNDX in OBJECT is the start of a function
|
// FNOFFSET in section SHNDX in OBJECT is the start of a function
|
// compiled with -fsplit-stack. The function calls non-split-stack
|
// compiled with -fsplit-stack. The function calls non-split-stack
|
// code. We have to change the function so that it always ensures
|
// code. We have to change the function so that it always ensures
|
// that it has enough stack space to run some random function.
|
// that it has enough stack space to run some random function.
|
|
|
|
template<int size>
|
void
|
void
|
Target_x86_64::do_calls_non_split(Relobj* object, unsigned int shndx,
|
Target_x86_64<size>::do_calls_non_split(Relobj* object, unsigned int shndx,
|
section_offset_type fnoffset,
|
section_offset_type fnoffset,
|
section_size_type fnsize,
|
section_size_type fnsize,
|
unsigned char* view,
|
unsigned char* view,
|
section_size_type view_size,
|
section_size_type view_size,
|
std::string* from,
|
std::string* from,
|
| Line 4002... |
Line 4187... |
*to = "__morestack_non_split";
|
*to = "__morestack_non_split";
|
}
|
}
|
|
|
// The selector for x86_64 object files.
|
// The selector for x86_64 object files.
|
|
|
|
template<int size>
|
class Target_selector_x86_64 : public Target_selector_freebsd
|
class Target_selector_x86_64 : public Target_selector_freebsd
|
{
|
{
|
public:
|
public:
|
Target_selector_x86_64()
|
Target_selector_x86_64()
|
: Target_selector_freebsd(elfcpp::EM_X86_64, 64, false, "elf64-x86-64",
|
: Target_selector_freebsd(elfcpp::EM_X86_64, size, false,
|
"elf64-x86-64-freebsd", "elf_x86_64")
|
(size == 64
|
|
? "elf64-x86-64" : "elf32-x86-64"),
|
|
(size == 64
|
|
? "elf64-x86-64-freebsd"
|
|
: "elf32-x86-64-freebsd"),
|
|
(size == 64 ? "elf_x86_64" : "elf32_x86_64"))
|
{ }
|
{ }
|
|
|
Target*
|
Target*
|
do_instantiate_target()
|
do_instantiate_target()
|
{ return new Target_x86_64(); }
|
{ return new Target_x86_64<size>(); }
|
|
|
};
|
};
|
|
|
Target_selector_x86_64 target_selector_x86_64;
|
Target_selector_x86_64<64> target_selector_x86_64;
|
|
Target_selector_x86_64<32> target_selector_x32;
|
|
|
} // End anonymous namespace.
|
} // End anonymous namespace.
|
|
|
No newline at end of file
|
No newline at end of file
|
