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8d9743bd43
gold/ * dynobj.cc (Dynobj::create_elf_hash_table): Create hash table with target-specific entry size. (Dynobj::sized_create_elf_hash_table): Add size template parameter. * dynobj.h (Dynobj::sized_create_elf_hash_table): Likewise. * layout.cc (Layout::create_dynamic_symtab): Set entsize to hash_entry_size. * target.h (Target::hash_entry_size): New method. (Target::Target_info::hash_entry_size): New data member. * aarch64.cc (Target_aarch64::aarch64_info): Add hash_entry_size. * arm.cc (Target_arm::arm_info): Likewise. (Target_arm_nacl::arm_nacl_info): Likewise. * i386.cc (Target_i386::i386_info): Likewise. (Target_i386_nacl::i386_nacl_info): Likewise. (Target_iamcu::iamcu_info): Likewise. * mips.cc (Target_mips::mips_info): Likewise. (Target_mips_nacl::mips_nacl_info): Likewise. * powerpc.cc (Target_powerpc::powerpc_info): Likewise. * sparc.cc (Target_sparc::sparc_info): Likewise. * tilegx.cc (Target_tilegx::tilegx_info): Likewise. * x86_64.cc (Target_x86_64::x86_64_info): Likewise. (Target_x86_64_nacl::x86_64_nacl_info): Likewise. * testsuite/testfile.cc (Target_test::test_target_info): Likewise.
4398 lines
130 KiB
C++
4398 lines
130 KiB
C++
// sparc.cc -- sparc target support for gold.
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// Copyright (C) 2008-2015 Free Software Foundation, Inc.
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// Written by David S. Miller <davem@davemloft.net>.
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// This file is part of gold.
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// This program is free software; you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation; either version 3 of the License, or
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// (at your option) any later version.
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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// You should have received a copy of the GNU General Public License
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// along with this program; if not, write to the Free Software
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// Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
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// MA 02110-1301, USA.
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#include "gold.h"
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#include <cstdlib>
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#include <cstdio>
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#include <cstring>
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#include "elfcpp.h"
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#include "parameters.h"
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#include "reloc.h"
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#include "sparc.h"
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#include "object.h"
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#include "symtab.h"
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#include "layout.h"
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#include "output.h"
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#include "copy-relocs.h"
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#include "target.h"
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#include "target-reloc.h"
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#include "target-select.h"
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#include "tls.h"
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#include "errors.h"
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#include "gc.h"
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namespace
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{
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using namespace gold;
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template<int size, bool big_endian>
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class Output_data_plt_sparc;
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template<int size, bool big_endian>
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class Target_sparc : public Sized_target<size, big_endian>
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{
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public:
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typedef Output_data_reloc<elfcpp::SHT_RELA, true, size, big_endian> Reloc_section;
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Target_sparc()
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: Sized_target<size, big_endian>(&sparc_info),
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got_(NULL), plt_(NULL), rela_dyn_(NULL), rela_ifunc_(NULL),
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copy_relocs_(elfcpp::R_SPARC_COPY),
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got_mod_index_offset_(-1U), tls_get_addr_sym_(NULL),
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elf_machine_(sparc_info.machine_code), elf_flags_(0),
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elf_flags_set_(false)
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{
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}
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// Process the relocations to determine unreferenced sections for
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// garbage collection.
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void
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gc_process_relocs(Symbol_table* symtab,
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Layout* layout,
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Sized_relobj_file<size, big_endian>* object,
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unsigned int data_shndx,
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unsigned int sh_type,
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const unsigned char* prelocs,
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size_t reloc_count,
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Output_section* output_section,
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bool needs_special_offset_handling,
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size_t local_symbol_count,
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const unsigned char* plocal_symbols);
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// Scan the relocations to look for symbol adjustments.
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void
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scan_relocs(Symbol_table* symtab,
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Layout* layout,
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Sized_relobj_file<size, big_endian>* object,
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unsigned int data_shndx,
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unsigned int sh_type,
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const unsigned char* prelocs,
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size_t reloc_count,
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Output_section* output_section,
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bool needs_special_offset_handling,
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size_t local_symbol_count,
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const unsigned char* plocal_symbols);
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// Finalize the sections.
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void
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do_finalize_sections(Layout*, const Input_objects*, Symbol_table*);
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// Return the value to use for a dynamic which requires special
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// treatment.
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uint64_t
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do_dynsym_value(const Symbol*) const;
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// Relocate a section.
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void
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relocate_section(const Relocate_info<size, big_endian>*,
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unsigned int sh_type,
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const unsigned char* prelocs,
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size_t reloc_count,
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Output_section* output_section,
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bool needs_special_offset_handling,
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unsigned char* view,
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typename elfcpp::Elf_types<size>::Elf_Addr view_address,
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section_size_type view_size,
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const Reloc_symbol_changes*);
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// Scan the relocs during a relocatable link.
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void
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scan_relocatable_relocs(Symbol_table* symtab,
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Layout* layout,
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Sized_relobj_file<size, big_endian>* object,
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unsigned int data_shndx,
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unsigned int sh_type,
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const unsigned char* prelocs,
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size_t reloc_count,
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Output_section* output_section,
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bool needs_special_offset_handling,
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size_t local_symbol_count,
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const unsigned char* plocal_symbols,
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Relocatable_relocs*);
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// Emit relocations for a section.
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void
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relocate_relocs(const Relocate_info<size, big_endian>*,
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unsigned int sh_type,
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const unsigned char* prelocs,
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size_t reloc_count,
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Output_section* output_section,
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typename elfcpp::Elf_types<size>::Elf_Off
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offset_in_output_section,
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const Relocatable_relocs*,
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unsigned char* view,
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typename elfcpp::Elf_types<size>::Elf_Addr view_address,
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section_size_type view_size,
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unsigned char* reloc_view,
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section_size_type reloc_view_size);
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// Return whether SYM is defined by the ABI.
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bool
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do_is_defined_by_abi(const Symbol* sym) const
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{
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// XXX Really need to support this better...
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if (sym->type() == elfcpp::STT_SPARC_REGISTER)
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return 1;
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return strcmp(sym->name(), "___tls_get_addr") == 0;
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}
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// Return the PLT address to use for a global symbol.
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uint64_t
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do_plt_address_for_global(const Symbol* gsym) const
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{ return this->plt_section()->address_for_global(gsym); }
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uint64_t
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do_plt_address_for_local(const Relobj* relobj, unsigned int symndx) const
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{ return this->plt_section()->address_for_local(relobj, symndx); }
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// Return whether there is a GOT section.
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bool
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has_got_section() const
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{ return this->got_ != NULL; }
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// Return the size of the GOT section.
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section_size_type
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got_size() const
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{
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gold_assert(this->got_ != NULL);
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return this->got_->data_size();
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}
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// Return the number of entries in the GOT.
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unsigned int
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got_entry_count() const
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{
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if (this->got_ == NULL)
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return 0;
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return this->got_size() / (size / 8);
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}
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// Return the address of the GOT.
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uint64_t
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got_address() const
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{
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if (this->got_ == NULL)
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return 0;
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return this->got_->address();
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}
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// Return the number of entries in the PLT.
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unsigned int
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plt_entry_count() const;
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// Return the offset of the first non-reserved PLT entry.
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unsigned int
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first_plt_entry_offset() const;
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// Return the size of each PLT entry.
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unsigned int
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plt_entry_size() const;
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protected:
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// Make an ELF object.
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Object*
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do_make_elf_object(const std::string&, Input_file*, off_t,
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const elfcpp::Ehdr<size, big_endian>& ehdr);
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void
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do_adjust_elf_header(unsigned char* view, int len);
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private:
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// The class which scans relocations.
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class Scan
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{
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public:
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Scan()
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: issued_non_pic_error_(false)
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{ }
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static inline int
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get_reference_flags(unsigned int r_type);
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inline void
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local(Symbol_table* symtab, Layout* layout, Target_sparc* target,
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Sized_relobj_file<size, big_endian>* object,
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unsigned int data_shndx,
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Output_section* output_section,
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const elfcpp::Rela<size, big_endian>& reloc, unsigned int r_type,
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const elfcpp::Sym<size, big_endian>& lsym,
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bool is_discarded);
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inline void
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global(Symbol_table* symtab, Layout* layout, Target_sparc* target,
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Sized_relobj_file<size, big_endian>* object,
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unsigned int data_shndx,
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Output_section* output_section,
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const elfcpp::Rela<size, big_endian>& reloc, unsigned int r_type,
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Symbol* gsym);
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inline bool
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local_reloc_may_be_function_pointer(Symbol_table* , Layout* ,
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Target_sparc* ,
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Sized_relobj_file<size, big_endian>* ,
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unsigned int ,
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Output_section* ,
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const elfcpp::Rela<size, big_endian>& ,
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unsigned int ,
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const elfcpp::Sym<size, big_endian>&)
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{ return false; }
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inline bool
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global_reloc_may_be_function_pointer(Symbol_table* , Layout* ,
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Target_sparc* ,
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Sized_relobj_file<size, big_endian>* ,
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unsigned int ,
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Output_section* ,
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const elfcpp::Rela<size,
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big_endian>& ,
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unsigned int , Symbol*)
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{ return false; }
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private:
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static void
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unsupported_reloc_local(Sized_relobj_file<size, big_endian>*,
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unsigned int r_type);
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static void
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unsupported_reloc_global(Sized_relobj_file<size, big_endian>*,
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unsigned int r_type, Symbol*);
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static void
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generate_tls_call(Symbol_table* symtab, Layout* layout,
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Target_sparc* target);
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void
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check_non_pic(Relobj*, unsigned int r_type);
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bool
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reloc_needs_plt_for_ifunc(Sized_relobj_file<size, big_endian>*,
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unsigned int r_type);
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// Whether we have issued an error about a non-PIC compilation.
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bool issued_non_pic_error_;
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};
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// The class which implements relocation.
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class Relocate
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{
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public:
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Relocate()
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: ignore_gd_add_(false), reloc_adjust_addr_(NULL)
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{ }
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~Relocate()
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{
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if (this->ignore_gd_add_)
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{
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// FIXME: This needs to specify the location somehow.
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gold_error(_("missing expected TLS relocation"));
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}
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}
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// Do a relocation. Return false if the caller should not issue
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// any warnings about this relocation.
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inline bool
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relocate(const Relocate_info<size, big_endian>*, Target_sparc*,
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Output_section*, size_t relnum,
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const elfcpp::Rela<size, big_endian>&,
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unsigned int r_type, const Sized_symbol<size>*,
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const Symbol_value<size>*,
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unsigned char*,
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typename elfcpp::Elf_types<size>::Elf_Addr,
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section_size_type);
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private:
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// Do a TLS relocation.
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inline void
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relocate_tls(const Relocate_info<size, big_endian>*, Target_sparc* target,
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size_t relnum, const elfcpp::Rela<size, big_endian>&,
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unsigned int r_type, const Sized_symbol<size>*,
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const Symbol_value<size>*,
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unsigned char*,
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typename elfcpp::Elf_types<size>::Elf_Addr,
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section_size_type);
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inline void
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relax_call(Target_sparc<size, big_endian>* target,
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unsigned char* view,
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const elfcpp::Rela<size, big_endian>& rela,
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section_size_type view_size);
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// Ignore the next relocation which should be R_SPARC_TLS_GD_ADD
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bool ignore_gd_add_;
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// If we hit a reloc at this view address, adjust it back by 4 bytes.
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unsigned char *reloc_adjust_addr_;
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};
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// A class which returns the size required for a relocation type,
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// used while scanning relocs during a relocatable link.
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class Relocatable_size_for_reloc
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{
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public:
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unsigned int
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get_size_for_reloc(unsigned int, Relobj*);
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};
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// Get the GOT section, creating it if necessary.
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Output_data_got<size, big_endian>*
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got_section(Symbol_table*, Layout*);
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// Create the PLT section.
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void
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make_plt_section(Symbol_table* symtab, Layout* layout);
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// Create a PLT entry for a global symbol.
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void
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make_plt_entry(Symbol_table*, Layout*, Symbol*);
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// Create a PLT entry for a local STT_GNU_IFUNC symbol.
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void
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make_local_ifunc_plt_entry(Symbol_table*, Layout*,
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Sized_relobj_file<size, big_endian>* relobj,
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unsigned int local_sym_index);
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// Create a GOT entry for the TLS module index.
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unsigned int
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got_mod_index_entry(Symbol_table* symtab, Layout* layout,
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Sized_relobj_file<size, big_endian>* object);
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// Return the gsym for "__tls_get_addr". Cache if not already
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// cached.
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Symbol*
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tls_get_addr_sym(Symbol_table* symtab)
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{
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if (!this->tls_get_addr_sym_)
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this->tls_get_addr_sym_ = symtab->lookup("__tls_get_addr", NULL);
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gold_assert(this->tls_get_addr_sym_);
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return this->tls_get_addr_sym_;
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}
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// Get the PLT section.
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Output_data_plt_sparc<size, big_endian>*
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plt_section() const
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{
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gold_assert(this->plt_ != NULL);
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return this->plt_;
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}
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// Get the dynamic reloc section, creating it if necessary.
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Reloc_section*
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rela_dyn_section(Layout*);
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// Get the section to use for IFUNC relocations.
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Reloc_section*
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rela_ifunc_section(Layout*);
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// Copy a relocation against a global symbol.
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void
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copy_reloc(Symbol_table* symtab, Layout* layout,
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Sized_relobj_file<size, big_endian>* object,
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unsigned int shndx, Output_section* output_section,
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Symbol* sym, const elfcpp::Rela<size, big_endian>& reloc)
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{
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this->copy_relocs_.copy_reloc(symtab, layout,
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symtab->get_sized_symbol<size>(sym),
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object, shndx, output_section,
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reloc, this->rela_dyn_section(layout));
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}
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// Information about this specific target which we pass to the
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// general Target structure.
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static Target::Target_info sparc_info;
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// The types of GOT entries needed for this platform.
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// These values are exposed to the ABI in an incremental link.
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// Do not renumber existing values without changing the version
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// number of the .gnu_incremental_inputs section.
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enum Got_type
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{
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GOT_TYPE_STANDARD = 0, // GOT entry for a regular symbol
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GOT_TYPE_TLS_OFFSET = 1, // GOT entry for TLS offset
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GOT_TYPE_TLS_PAIR = 2, // GOT entry for TLS module/offset pair
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};
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// The GOT section.
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Output_data_got<size, big_endian>* got_;
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// The PLT section.
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Output_data_plt_sparc<size, big_endian>* plt_;
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// The dynamic reloc section.
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Reloc_section* rela_dyn_;
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// The section to use for IFUNC relocs.
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Reloc_section* rela_ifunc_;
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// Relocs saved to avoid a COPY reloc.
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Copy_relocs<elfcpp::SHT_RELA, size, big_endian> copy_relocs_;
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// Offset of the GOT entry for the TLS module index;
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unsigned int got_mod_index_offset_;
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// Cached pointer to __tls_get_addr symbol
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Symbol* tls_get_addr_sym_;
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// Accumulated elf machine type
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elfcpp::Elf_Half elf_machine_;
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// Accumulated elf header flags
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elfcpp::Elf_Word elf_flags_;
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// Whether elf_flags_ has been set for the first time yet
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bool elf_flags_set_;
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};
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template<>
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Target::Target_info Target_sparc<32, true>::sparc_info =
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{
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32, // size
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true, // is_big_endian
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elfcpp::EM_SPARC, // machine_code
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false, // has_make_symbol
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false, // has_resolve
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false, // has_code_fill
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true, // is_default_stack_executable
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false, // can_icf_inline_merge_sections
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'\0', // wrap_char
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"/usr/lib/ld.so.1", // dynamic_linker
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0x00010000, // default_text_segment_address
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64 * 1024, // abi_pagesize (overridable by -z max-page-size)
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8 * 1024, // common_pagesize (overridable by -z common-page-size)
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false, // isolate_execinstr
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0, // rosegment_gap
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elfcpp::SHN_UNDEF, // small_common_shndx
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elfcpp::SHN_UNDEF, // large_common_shndx
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0, // small_common_section_flags
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0, // large_common_section_flags
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NULL, // attributes_section
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NULL, // attributes_vendor
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"_start", // entry_symbol_name
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32, // hash_entry_size
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};
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template<>
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Target::Target_info Target_sparc<64, true>::sparc_info =
|
|
{
|
|
64, // size
|
|
true, // is_big_endian
|
|
elfcpp::EM_SPARCV9, // machine_code
|
|
false, // has_make_symbol
|
|
false, // has_resolve
|
|
false, // has_code_fill
|
|
true, // is_default_stack_executable
|
|
false, // can_icf_inline_merge_sections
|
|
'\0', // wrap_char
|
|
"/usr/lib/sparcv9/ld.so.1", // dynamic_linker
|
|
0x100000, // default_text_segment_address
|
|
64 * 1024, // abi_pagesize (overridable by -z max-page-size)
|
|
8 * 1024, // common_pagesize (overridable by -z common-page-size)
|
|
false, // isolate_execinstr
|
|
0, // rosegment_gap
|
|
elfcpp::SHN_UNDEF, // small_common_shndx
|
|
elfcpp::SHN_UNDEF, // large_common_shndx
|
|
0, // small_common_section_flags
|
|
0, // large_common_section_flags
|
|
NULL, // attributes_section
|
|
NULL, // attributes_vendor
|
|
"_start", // entry_symbol_name
|
|
32, // hash_entry_size
|
|
};
|
|
|
|
// We have to take care here, even when operating in little-endian
|
|
// mode, sparc instructions are still big endian.
|
|
template<int size, bool big_endian>
|
|
class Sparc_relocate_functions
|
|
{
|
|
private:
|
|
// Do a simple relocation with the addend in the relocation.
|
|
template<int valsize>
|
|
static inline void
|
|
rela(unsigned char* view,
|
|
unsigned int right_shift,
|
|
typename elfcpp::Elf_types<valsize>::Elf_Addr dst_mask,
|
|
typename elfcpp::Swap<size, big_endian>::Valtype value,
|
|
typename elfcpp::Swap<size, big_endian>::Valtype addend)
|
|
{
|
|
typedef typename elfcpp::Swap<valsize, big_endian>::Valtype Valtype;
|
|
Valtype* wv = reinterpret_cast<Valtype*>(view);
|
|
Valtype val = elfcpp::Swap<valsize, big_endian>::readval(wv);
|
|
Valtype reloc = ((value + addend) >> right_shift);
|
|
|
|
val &= ~dst_mask;
|
|
reloc &= dst_mask;
|
|
|
|
elfcpp::Swap<valsize, big_endian>::writeval(wv, val | reloc);
|
|
}
|
|
|
|
// Do a simple relocation using a symbol value with the addend in
|
|
// the relocation.
|
|
template<int valsize>
|
|
static inline void
|
|
rela(unsigned char* view,
|
|
unsigned int right_shift,
|
|
typename elfcpp::Elf_types<valsize>::Elf_Addr dst_mask,
|
|
const Sized_relobj_file<size, big_endian>* object,
|
|
const Symbol_value<size>* psymval,
|
|
typename elfcpp::Swap<valsize, big_endian>::Valtype addend)
|
|
{
|
|
typedef typename elfcpp::Swap<valsize, big_endian>::Valtype Valtype;
|
|
Valtype* wv = reinterpret_cast<Valtype*>(view);
|
|
Valtype val = elfcpp::Swap<valsize, big_endian>::readval(wv);
|
|
Valtype reloc = (psymval->value(object, addend) >> right_shift);
|
|
|
|
val &= ~dst_mask;
|
|
reloc &= dst_mask;
|
|
|
|
elfcpp::Swap<valsize, big_endian>::writeval(wv, val | reloc);
|
|
}
|
|
|
|
// Do a simple relocation using a symbol value with the addend in
|
|
// the relocation, unaligned.
|
|
template<int valsize>
|
|
static inline void
|
|
rela_ua(unsigned char* view,
|
|
unsigned int right_shift, elfcpp::Elf_Xword dst_mask,
|
|
const Sized_relobj_file<size, big_endian>* object,
|
|
const Symbol_value<size>* psymval,
|
|
typename elfcpp::Swap<size, big_endian>::Valtype addend)
|
|
{
|
|
typedef typename elfcpp::Swap_unaligned<valsize,
|
|
big_endian>::Valtype Valtype;
|
|
unsigned char* wv = view;
|
|
Valtype val = elfcpp::Swap_unaligned<valsize, big_endian>::readval(wv);
|
|
Valtype reloc = (psymval->value(object, addend) >> right_shift);
|
|
|
|
val &= ~dst_mask;
|
|
reloc &= dst_mask;
|
|
|
|
elfcpp::Swap_unaligned<valsize, big_endian>::writeval(wv, val | reloc);
|
|
}
|
|
|
|
// Do a simple PC relative relocation with a Symbol_value with the
|
|
// addend in the relocation.
|
|
template<int valsize>
|
|
static inline void
|
|
pcrela(unsigned char* view,
|
|
unsigned int right_shift,
|
|
typename elfcpp::Elf_types<valsize>::Elf_Addr dst_mask,
|
|
const Sized_relobj_file<size, big_endian>* object,
|
|
const Symbol_value<size>* psymval,
|
|
typename elfcpp::Swap<size, big_endian>::Valtype addend,
|
|
typename elfcpp::Elf_types<size>::Elf_Addr address)
|
|
{
|
|
typedef typename elfcpp::Swap<valsize, big_endian>::Valtype Valtype;
|
|
Valtype* wv = reinterpret_cast<Valtype*>(view);
|
|
Valtype val = elfcpp::Swap<valsize, big_endian>::readval(wv);
|
|
Valtype reloc = ((psymval->value(object, addend) - address)
|
|
>> right_shift);
|
|
|
|
val &= ~dst_mask;
|
|
reloc &= dst_mask;
|
|
|
|
elfcpp::Swap<valsize, big_endian>::writeval(wv, val | reloc);
|
|
}
|
|
|
|
template<int valsize>
|
|
static inline void
|
|
pcrela_unaligned(unsigned char* view,
|
|
const Sized_relobj_file<size, big_endian>* object,
|
|
const Symbol_value<size>* psymval,
|
|
typename elfcpp::Swap<size, big_endian>::Valtype addend,
|
|
typename elfcpp::Elf_types<size>::Elf_Addr address)
|
|
{
|
|
typedef typename elfcpp::Swap_unaligned<valsize,
|
|
big_endian>::Valtype Valtype;
|
|
unsigned char* wv = view;
|
|
Valtype reloc = (psymval->value(object, addend) - address);
|
|
|
|
elfcpp::Swap_unaligned<valsize, big_endian>::writeval(wv, reloc);
|
|
}
|
|
|
|
typedef Sparc_relocate_functions<size, big_endian> This;
|
|
typedef Sparc_relocate_functions<size, true> This_insn;
|
|
|
|
public:
|
|
// R_SPARC_WDISP30: (Symbol + Addend - Address) >> 2
|
|
static inline void
|
|
wdisp30(unsigned char* view,
|
|
const Sized_relobj_file<size, big_endian>* object,
|
|
const Symbol_value<size>* psymval,
|
|
typename elfcpp::Elf_types<size>::Elf_Addr addend,
|
|
typename elfcpp::Elf_types<size>::Elf_Addr address)
|
|
{
|
|
This_insn::template pcrela<32>(view, 2, 0x3fffffff, object,
|
|
psymval, addend, address);
|
|
}
|
|
|
|
// R_SPARC_WDISP22: (Symbol + Addend - Address) >> 2
|
|
static inline void
|
|
wdisp22(unsigned char* view,
|
|
const Sized_relobj_file<size, big_endian>* object,
|
|
const Symbol_value<size>* psymval,
|
|
typename elfcpp::Elf_types<size>::Elf_Addr addend,
|
|
typename elfcpp::Elf_types<size>::Elf_Addr address)
|
|
{
|
|
This_insn::template pcrela<32>(view, 2, 0x003fffff, object,
|
|
psymval, addend, address);
|
|
}
|
|
|
|
// R_SPARC_WDISP19: (Symbol + Addend - Address) >> 2
|
|
static inline void
|
|
wdisp19(unsigned char* view,
|
|
const Sized_relobj_file<size, big_endian>* object,
|
|
const Symbol_value<size>* psymval,
|
|
typename elfcpp::Elf_types<size>::Elf_Addr addend,
|
|
typename elfcpp::Elf_types<size>::Elf_Addr address)
|
|
{
|
|
This_insn::template pcrela<32>(view, 2, 0x0007ffff, object,
|
|
psymval, addend, address);
|
|
}
|
|
|
|
// R_SPARC_WDISP16: (Symbol + Addend - Address) >> 2
|
|
static inline void
|
|
wdisp16(unsigned char* view,
|
|
const Sized_relobj_file<size, big_endian>* object,
|
|
const Symbol_value<size>* psymval,
|
|
typename elfcpp::Elf_types<size>::Elf_Addr addend,
|
|
typename elfcpp::Elf_types<size>::Elf_Addr address)
|
|
{
|
|
typedef typename elfcpp::Swap<32, true>::Valtype Valtype;
|
|
Valtype* wv = reinterpret_cast<Valtype*>(view);
|
|
Valtype val = elfcpp::Swap<32, true>::readval(wv);
|
|
Valtype reloc = ((psymval->value(object, addend) - address)
|
|
>> 2);
|
|
|
|
// The relocation value is split between the low 14 bits,
|
|
// and bits 20-21.
|
|
val &= ~((0x3 << 20) | 0x3fff);
|
|
reloc = (((reloc & 0xc000) << (20 - 14))
|
|
| (reloc & 0x3ffff));
|
|
|
|
elfcpp::Swap<32, true>::writeval(wv, val | reloc);
|
|
}
|
|
|
|
// R_SPARC_WDISP10: (Symbol + Addend - Address) >> 2
|
|
static inline void
|
|
wdisp10(unsigned char* view,
|
|
const Sized_relobj_file<size, big_endian>* object,
|
|
const Symbol_value<size>* psymval,
|
|
typename elfcpp::Elf_types<size>::Elf_Addr addend,
|
|
typename elfcpp::Elf_types<size>::Elf_Addr address)
|
|
{
|
|
typedef typename elfcpp::Swap<32, true>::Valtype Valtype;
|
|
Valtype* wv = reinterpret_cast<Valtype*>(view);
|
|
Valtype val = elfcpp::Swap<32, true>::readval(wv);
|
|
Valtype reloc = ((psymval->value(object, addend) - address)
|
|
>> 2);
|
|
|
|
// The relocation value is split between the low bits 5-12,
|
|
// and high bits 19-20.
|
|
val &= ~((0x3 << 19) | (0xff << 5));
|
|
reloc = (((reloc & 0x300) << (19 - 8))
|
|
| ((reloc & 0xff) << (5 - 0)));
|
|
|
|
elfcpp::Swap<32, true>::writeval(wv, val | reloc);
|
|
}
|
|
|
|
// R_SPARC_PC22: (Symbol + Addend - Address) >> 10
|
|
static inline void
|
|
pc22(unsigned char* view,
|
|
const Sized_relobj_file<size, big_endian>* object,
|
|
const Symbol_value<size>* psymval,
|
|
typename elfcpp::Elf_types<size>::Elf_Addr addend,
|
|
typename elfcpp::Elf_types<size>::Elf_Addr address)
|
|
{
|
|
This_insn::template pcrela<32>(view, 10, 0x003fffff, object,
|
|
psymval, addend, address);
|
|
}
|
|
|
|
// R_SPARC_PC10: (Symbol + Addend - Address) & 0x3ff
|
|
static inline void
|
|
pc10(unsigned char* view,
|
|
const Sized_relobj_file<size, big_endian>* object,
|
|
const Symbol_value<size>* psymval,
|
|
typename elfcpp::Elf_types<size>::Elf_Addr addend,
|
|
typename elfcpp::Elf_types<size>::Elf_Addr address)
|
|
{
|
|
This_insn::template pcrela<32>(view, 0, 0x000003ff, object,
|
|
psymval, addend, address);
|
|
}
|
|
|
|
// R_SPARC_HI22: (Symbol + Addend) >> 10
|
|
static inline void
|
|
hi22(unsigned char* view,
|
|
typename elfcpp::Elf_types<size>::Elf_Addr value,
|
|
typename elfcpp::Elf_types<size>::Elf_Addr addend)
|
|
{
|
|
This_insn::template rela<32>(view, 10, 0x003fffff, value, addend);
|
|
}
|
|
|
|
// R_SPARC_HI22: (Symbol + Addend) >> 10
|
|
static inline void
|
|
hi22(unsigned char* view,
|
|
const Sized_relobj_file<size, big_endian>* object,
|
|
const Symbol_value<size>* psymval,
|
|
typename elfcpp::Elf_types<size>::Elf_Addr addend)
|
|
{
|
|
This_insn::template rela<32>(view, 10, 0x003fffff, object, psymval, addend);
|
|
}
|
|
|
|
// R_SPARC_PCPLT22: (Symbol + Addend - Address) >> 10
|
|
static inline void
|
|
pcplt22(unsigned char* view,
|
|
const Sized_relobj_file<size, big_endian>* object,
|
|
const Symbol_value<size>* psymval,
|
|
typename elfcpp::Elf_types<size>::Elf_Addr addend,
|
|
typename elfcpp::Elf_types<size>::Elf_Addr address)
|
|
{
|
|
This_insn::template pcrela<32>(view, 10, 0x003fffff, object,
|
|
psymval, addend, address);
|
|
}
|
|
|
|
// R_SPARC_LO10: (Symbol + Addend) & 0x3ff
|
|
static inline void
|
|
lo10(unsigned char* view,
|
|
typename elfcpp::Elf_types<size>::Elf_Addr value,
|
|
typename elfcpp::Elf_types<size>::Elf_Addr addend)
|
|
{
|
|
This_insn::template rela<32>(view, 0, 0x000003ff, value, addend);
|
|
}
|
|
|
|
// R_SPARC_LO10: (Symbol + Addend) & 0x3ff
|
|
static inline void
|
|
lo10(unsigned char* view,
|
|
const Sized_relobj_file<size, big_endian>* object,
|
|
const Symbol_value<size>* psymval,
|
|
typename elfcpp::Elf_types<size>::Elf_Addr addend)
|
|
{
|
|
This_insn::template rela<32>(view, 0, 0x000003ff, object, psymval, addend);
|
|
}
|
|
|
|
// R_SPARC_LO10: (Symbol + Addend) & 0x3ff
|
|
static inline void
|
|
lo10(unsigned char* view,
|
|
const Sized_relobj_file<size, big_endian>* object,
|
|
const Symbol_value<size>* psymval,
|
|
typename elfcpp::Elf_types<size>::Elf_Addr addend,
|
|
typename elfcpp::Elf_types<size>::Elf_Addr address)
|
|
{
|
|
This_insn::template pcrela<32>(view, 0, 0x000003ff, object,
|
|
psymval, addend, address);
|
|
}
|
|
|
|
// R_SPARC_OLO10: ((Symbol + Addend) & 0x3ff) + Addend2
|
|
static inline void
|
|
olo10(unsigned char* view,
|
|
const Sized_relobj_file<size, big_endian>* object,
|
|
const Symbol_value<size>* psymval,
|
|
typename elfcpp::Elf_types<size>::Elf_Addr addend,
|
|
typename elfcpp::Elf_types<size>::Elf_Addr addend2)
|
|
{
|
|
typedef typename elfcpp::Swap<32, true>::Valtype Valtype;
|
|
Valtype* wv = reinterpret_cast<Valtype*>(view);
|
|
Valtype val = elfcpp::Swap<32, true>::readval(wv);
|
|
Valtype reloc = psymval->value(object, addend);
|
|
|
|
val &= ~0x1fff;
|
|
reloc &= 0x3ff;
|
|
reloc += addend2;
|
|
reloc &= 0x1fff;
|
|
|
|
elfcpp::Swap<32, true>::writeval(wv, val | reloc);
|
|
}
|
|
|
|
// R_SPARC_22: (Symbol + Addend)
|
|
static inline void
|
|
rela32_22(unsigned char* view,
|
|
const Sized_relobj_file<size, big_endian>* object,
|
|
const Symbol_value<size>* psymval,
|
|
typename elfcpp::Elf_types<size>::Elf_Addr addend)
|
|
{
|
|
This_insn::template rela<32>(view, 0, 0x003fffff, object, psymval, addend);
|
|
}
|
|
|
|
// R_SPARC_13: (Symbol + Addend)
|
|
static inline void
|
|
rela32_13(unsigned char* view,
|
|
typename elfcpp::Elf_types<size>::Elf_Addr value,
|
|
typename elfcpp::Elf_types<size>::Elf_Addr addend)
|
|
{
|
|
This_insn::template rela<32>(view, 0, 0x00001fff, value, addend);
|
|
}
|
|
|
|
// R_SPARC_13: (Symbol + Addend)
|
|
static inline void
|
|
rela32_13(unsigned char* view,
|
|
const Sized_relobj_file<size, big_endian>* object,
|
|
const Symbol_value<size>* psymval,
|
|
typename elfcpp::Elf_types<size>::Elf_Addr addend)
|
|
{
|
|
This_insn::template rela<32>(view, 0, 0x00001fff, object, psymval, addend);
|
|
}
|
|
|
|
// R_SPARC_UA16: (Symbol + Addend)
|
|
static inline void
|
|
ua16(unsigned char* view,
|
|
const Sized_relobj_file<size, big_endian>* object,
|
|
const Symbol_value<size>* psymval,
|
|
typename elfcpp::Elf_types<size>::Elf_Addr addend)
|
|
{
|
|
This::template rela_ua<16>(view, 0, 0xffff, object, psymval, addend);
|
|
}
|
|
|
|
// R_SPARC_UA32: (Symbol + Addend)
|
|
static inline void
|
|
ua32(unsigned char* view,
|
|
const Sized_relobj_file<size, big_endian>* object,
|
|
const Symbol_value<size>* psymval,
|
|
typename elfcpp::Elf_types<size>::Elf_Addr addend)
|
|
{
|
|
This::template rela_ua<32>(view, 0, 0xffffffff, object, psymval, addend);
|
|
}
|
|
|
|
// R_SPARC_UA64: (Symbol + Addend)
|
|
static inline void
|
|
ua64(unsigned char* view,
|
|
const Sized_relobj_file<size, big_endian>* object,
|
|
const Symbol_value<size>* psymval,
|
|
typename elfcpp::Elf_types<size>::Elf_Addr addend)
|
|
{
|
|
This::template rela_ua<64>(view, 0, ~(elfcpp::Elf_Xword) 0,
|
|
object, psymval, addend);
|
|
}
|
|
|
|
// R_SPARC_DISP8: (Symbol + Addend - Address)
|
|
static inline void
|
|
disp8(unsigned char* view,
|
|
const Sized_relobj_file<size, big_endian>* object,
|
|
const Symbol_value<size>* psymval,
|
|
typename elfcpp::Elf_types<size>::Elf_Addr addend,
|
|
typename elfcpp::Elf_types<size>::Elf_Addr address)
|
|
{
|
|
This::template pcrela_unaligned<8>(view, object, psymval,
|
|
addend, address);
|
|
}
|
|
|
|
// R_SPARC_DISP16: (Symbol + Addend - Address)
|
|
static inline void
|
|
disp16(unsigned char* view,
|
|
const Sized_relobj_file<size, big_endian>* object,
|
|
const Symbol_value<size>* psymval,
|
|
typename elfcpp::Elf_types<size>::Elf_Addr addend,
|
|
typename elfcpp::Elf_types<size>::Elf_Addr address)
|
|
{
|
|
This::template pcrela_unaligned<16>(view, object, psymval,
|
|
addend, address);
|
|
}
|
|
|
|
// R_SPARC_DISP32: (Symbol + Addend - Address)
|
|
static inline void
|
|
disp32(unsigned char* view,
|
|
const Sized_relobj_file<size, big_endian>* object,
|
|
const Symbol_value<size>* psymval,
|
|
typename elfcpp::Elf_types<size>::Elf_Addr addend,
|
|
typename elfcpp::Elf_types<size>::Elf_Addr address)
|
|
{
|
|
This::template pcrela_unaligned<32>(view, object, psymval,
|
|
addend, address);
|
|
}
|
|
|
|
// R_SPARC_DISP64: (Symbol + Addend - Address)
|
|
static inline void
|
|
disp64(unsigned char* view,
|
|
const Sized_relobj_file<size, big_endian>* object,
|
|
const Symbol_value<size>* psymval,
|
|
elfcpp::Elf_Xword addend,
|
|
typename elfcpp::Elf_types<size>::Elf_Addr address)
|
|
{
|
|
This::template pcrela_unaligned<64>(view, object, psymval,
|
|
addend, address);
|
|
}
|
|
|
|
// R_SPARC_H34: (Symbol + Addend) >> 12
|
|
static inline void
|
|
h34(unsigned char* view,
|
|
const Sized_relobj_file<size, big_endian>* object,
|
|
const Symbol_value<size>* psymval,
|
|
typename elfcpp::Elf_types<size>::Elf_Addr addend)
|
|
{
|
|
This_insn::template rela<32>(view, 12, 0x003fffff, object, psymval, addend);
|
|
}
|
|
|
|
// R_SPARC_H44: (Symbol + Addend) >> 22
|
|
static inline void
|
|
h44(unsigned char* view,
|
|
const Sized_relobj_file<size, big_endian>* object,
|
|
const Symbol_value<size>* psymval,
|
|
typename elfcpp::Elf_types<size>::Elf_Addr addend)
|
|
{
|
|
This_insn::template rela<32>(view, 22, 0x003fffff, object, psymval, addend);
|
|
}
|
|
|
|
// R_SPARC_M44: ((Symbol + Addend) >> 12) & 0x3ff
|
|
static inline void
|
|
m44(unsigned char* view,
|
|
const Sized_relobj_file<size, big_endian>* object,
|
|
const Symbol_value<size>* psymval,
|
|
typename elfcpp::Elf_types<size>::Elf_Addr addend)
|
|
{
|
|
This_insn::template rela<32>(view, 12, 0x000003ff, object, psymval, addend);
|
|
}
|
|
|
|
// R_SPARC_L44: (Symbol + Addend) & 0xfff
|
|
static inline void
|
|
l44(unsigned char* view,
|
|
const Sized_relobj_file<size, big_endian>* object,
|
|
const Symbol_value<size>* psymval,
|
|
typename elfcpp::Elf_types<size>::Elf_Addr addend)
|
|
{
|
|
This_insn::template rela<32>(view, 0, 0x00000fff, object, psymval, addend);
|
|
}
|
|
|
|
// R_SPARC_HH22: (Symbol + Addend) >> 42
|
|
static inline void
|
|
hh22(unsigned char* view,
|
|
const Sized_relobj_file<size, big_endian>* object,
|
|
const Symbol_value<size>* psymval,
|
|
typename elfcpp::Elf_types<size>::Elf_Addr addend)
|
|
{
|
|
This_insn::template rela<32>(view, 42, 0x003fffff, object, psymval, addend);
|
|
}
|
|
|
|
// R_SPARC_PC_HH22: (Symbol + Addend - Address) >> 42
|
|
static inline void
|
|
pc_hh22(unsigned char* view,
|
|
const Sized_relobj_file<size, big_endian>* object,
|
|
const Symbol_value<size>* psymval,
|
|
typename elfcpp::Elf_types<size>::Elf_Addr addend,
|
|
typename elfcpp::Elf_types<size>::Elf_Addr address)
|
|
{
|
|
This_insn::template pcrela<32>(view, 42, 0x003fffff, object,
|
|
psymval, addend, address);
|
|
}
|
|
|
|
// R_SPARC_HM10: ((Symbol + Addend) >> 32) & 0x3ff
|
|
static inline void
|
|
hm10(unsigned char* view,
|
|
const Sized_relobj_file<size, big_endian>* object,
|
|
const Symbol_value<size>* psymval,
|
|
typename elfcpp::Elf_types<size>::Elf_Addr addend)
|
|
{
|
|
This_insn::template rela<32>(view, 32, 0x000003ff, object, psymval, addend);
|
|
}
|
|
|
|
// R_SPARC_PC_HM10: ((Symbol + Addend - Address) >> 32) & 0x3ff
|
|
static inline void
|
|
pc_hm10(unsigned char* view,
|
|
const Sized_relobj_file<size, big_endian>* object,
|
|
const Symbol_value<size>* psymval,
|
|
typename elfcpp::Elf_types<size>::Elf_Addr addend,
|
|
typename elfcpp::Elf_types<size>::Elf_Addr address)
|
|
{
|
|
This_insn::template pcrela<32>(view, 32, 0x000003ff, object,
|
|
psymval, addend, address);
|
|
}
|
|
|
|
// R_SPARC_11: (Symbol + Addend)
|
|
static inline void
|
|
rela32_11(unsigned char* view,
|
|
const Sized_relobj_file<size, big_endian>* object,
|
|
const Symbol_value<size>* psymval,
|
|
typename elfcpp::Elf_types<size>::Elf_Addr addend)
|
|
{
|
|
This_insn::template rela<32>(view, 0, 0x000007ff, object, psymval, addend);
|
|
}
|
|
|
|
// R_SPARC_10: (Symbol + Addend)
|
|
static inline void
|
|
rela32_10(unsigned char* view,
|
|
const Sized_relobj_file<size, big_endian>* object,
|
|
const Symbol_value<size>* psymval,
|
|
typename elfcpp::Elf_types<size>::Elf_Addr addend)
|
|
{
|
|
This_insn::template rela<32>(view, 0, 0x000003ff, object, psymval, addend);
|
|
}
|
|
|
|
// R_SPARC_7: (Symbol + Addend)
|
|
static inline void
|
|
rela32_7(unsigned char* view,
|
|
const Sized_relobj_file<size, big_endian>* object,
|
|
const Symbol_value<size>* psymval,
|
|
typename elfcpp::Elf_types<size>::Elf_Addr addend)
|
|
{
|
|
This_insn::template rela<32>(view, 0, 0x0000007f, object, psymval, addend);
|
|
}
|
|
|
|
// R_SPARC_6: (Symbol + Addend)
|
|
static inline void
|
|
rela32_6(unsigned char* view,
|
|
const Sized_relobj_file<size, big_endian>* object,
|
|
const Symbol_value<size>* psymval,
|
|
typename elfcpp::Elf_types<size>::Elf_Addr addend)
|
|
{
|
|
This_insn::template rela<32>(view, 0, 0x0000003f, object, psymval, addend);
|
|
}
|
|
|
|
// R_SPARC_5: (Symbol + Addend)
|
|
static inline void
|
|
rela32_5(unsigned char* view,
|
|
const Sized_relobj_file<size, big_endian>* object,
|
|
const Symbol_value<size>* psymval,
|
|
typename elfcpp::Elf_types<size>::Elf_Addr addend)
|
|
{
|
|
This_insn::template rela<32>(view, 0, 0x0000001f, object, psymval, addend);
|
|
}
|
|
|
|
// R_SPARC_TLS_LDO_HIX22: @dtpoff(Symbol + Addend) >> 10
|
|
static inline void
|
|
ldo_hix22(unsigned char* view,
|
|
typename elfcpp::Elf_types<size>::Elf_Addr value,
|
|
typename elfcpp::Elf_types<size>::Elf_Addr addend)
|
|
{
|
|
This_insn::hi22(view, value, addend);
|
|
}
|
|
|
|
// R_SPARC_TLS_LDO_LOX10: @dtpoff(Symbol + Addend) & 0x3ff
|
|
static inline void
|
|
ldo_lox10(unsigned char* view,
|
|
typename elfcpp::Elf_types<size>::Elf_Addr value,
|
|
typename elfcpp::Elf_types<size>::Elf_Addr addend)
|
|
{
|
|
typedef typename elfcpp::Swap<32, true>::Valtype Valtype;
|
|
Valtype* wv = reinterpret_cast<Valtype*>(view);
|
|
Valtype val = elfcpp::Swap<32, true>::readval(wv);
|
|
Valtype reloc = (value + addend);
|
|
|
|
val &= ~0x1fff;
|
|
reloc &= 0x3ff;
|
|
|
|
elfcpp::Swap<32, true>::writeval(wv, val | reloc);
|
|
}
|
|
|
|
// R_SPARC_TLS_LE_HIX22: (@tpoff(Symbol + Addend) ^ 0xffffffffffffffff) >> 10
|
|
static inline void
|
|
hix22(unsigned char* view,
|
|
typename elfcpp::Elf_types<size>::Elf_Addr value,
|
|
typename elfcpp::Elf_types<size>::Elf_Addr addend)
|
|
{
|
|
typedef typename elfcpp::Swap<32, true>::Valtype Valtype;
|
|
Valtype* wv = reinterpret_cast<Valtype*>(view);
|
|
Valtype val = elfcpp::Swap<32, true>::readval(wv);
|
|
Valtype reloc = (value + addend);
|
|
|
|
val &= ~0x3fffff;
|
|
|
|
reloc ^= ~(Valtype)0;
|
|
reloc >>= 10;
|
|
|
|
reloc &= 0x3fffff;
|
|
|
|
elfcpp::Swap<32, true>::writeval(wv, val | reloc);
|
|
}
|
|
|
|
// R_SPARC_GOTDATA_OP_HIX22: @gdopoff(Symbol + Addend) >> 10
|
|
static inline void
|
|
gdop_hix22(unsigned char* view,
|
|
typename elfcpp::Elf_types<size>::Elf_Addr value)
|
|
{
|
|
typedef typename elfcpp::Swap<32, true>::Valtype Valtype;
|
|
Valtype* wv = reinterpret_cast<Valtype*>(view);
|
|
Valtype val = elfcpp::Swap<32, true>::readval(wv);
|
|
int32_t reloc = static_cast<int32_t>(value);
|
|
|
|
val &= ~0x3fffff;
|
|
|
|
if (reloc < 0)
|
|
reloc ^= ~static_cast<int32_t>(0);
|
|
reloc >>= 10;
|
|
|
|
reloc &= 0x3fffff;
|
|
|
|
elfcpp::Swap<32, true>::writeval(wv, val | reloc);
|
|
}
|
|
|
|
// R_SPARC_HIX22: ((Symbol + Addend) ^ 0xffffffffffffffff) >> 10
|
|
static inline void
|
|
hix22(unsigned char* view,
|
|
const Sized_relobj_file<size, big_endian>* object,
|
|
const Symbol_value<size>* psymval,
|
|
typename elfcpp::Elf_types<size>::Elf_Addr addend)
|
|
{
|
|
typedef typename elfcpp::Swap<32, true>::Valtype Valtype;
|
|
Valtype* wv = reinterpret_cast<Valtype*>(view);
|
|
Valtype val = elfcpp::Swap<32, true>::readval(wv);
|
|
Valtype reloc = psymval->value(object, addend);
|
|
|
|
val &= ~0x3fffff;
|
|
|
|
reloc ^= ~(Valtype)0;
|
|
reloc >>= 10;
|
|
|
|
reloc &= 0x3fffff;
|
|
|
|
elfcpp::Swap<32, true>::writeval(wv, val | reloc);
|
|
}
|
|
|
|
|
|
// R_SPARC_TLS_LE_LOX10: (@tpoff(Symbol + Addend) & 0x3ff) | 0x1c00
|
|
static inline void
|
|
lox10(unsigned char* view,
|
|
typename elfcpp::Elf_types<size>::Elf_Addr value,
|
|
typename elfcpp::Elf_types<size>::Elf_Addr addend)
|
|
{
|
|
typedef typename elfcpp::Swap<32, true>::Valtype Valtype;
|
|
Valtype* wv = reinterpret_cast<Valtype*>(view);
|
|
Valtype val = elfcpp::Swap<32, true>::readval(wv);
|
|
Valtype reloc = (value + addend);
|
|
|
|
val &= ~0x1fff;
|
|
reloc &= 0x3ff;
|
|
reloc |= 0x1c00;
|
|
|
|
elfcpp::Swap<32, true>::writeval(wv, val | reloc);
|
|
}
|
|
|
|
// R_SPARC_GOTDATA_OP_LOX10: (@gdopoff(Symbol + Addend) & 0x3ff) | 0x1c00
|
|
static inline void
|
|
gdop_lox10(unsigned char* view,
|
|
typename elfcpp::Elf_types<size>::Elf_Addr value)
|
|
{
|
|
typedef typename elfcpp::Swap<32, true>::Valtype Valtype;
|
|
Valtype* wv = reinterpret_cast<Valtype*>(view);
|
|
Valtype val = elfcpp::Swap<32, true>::readval(wv);
|
|
int32_t reloc = static_cast<int32_t>(value);
|
|
|
|
if (reloc < 0)
|
|
reloc = (reloc & 0x3ff) | 0x1c00;
|
|
else
|
|
reloc = (reloc & 0x3ff);
|
|
|
|
val &= ~0x1fff;
|
|
elfcpp::Swap<32, true>::writeval(wv, val | reloc);
|
|
}
|
|
|
|
// R_SPARC_LOX10: ((Symbol + Addend) & 0x3ff) | 0x1c00
|
|
static inline void
|
|
lox10(unsigned char* view,
|
|
const Sized_relobj_file<size, big_endian>* object,
|
|
const Symbol_value<size>* psymval,
|
|
typename elfcpp::Elf_types<size>::Elf_Addr addend)
|
|
{
|
|
typedef typename elfcpp::Swap<32, true>::Valtype Valtype;
|
|
Valtype* wv = reinterpret_cast<Valtype*>(view);
|
|
Valtype val = elfcpp::Swap<32, true>::readval(wv);
|
|
Valtype reloc = psymval->value(object, addend);
|
|
|
|
val &= ~0x1fff;
|
|
reloc &= 0x3ff;
|
|
reloc |= 0x1c00;
|
|
|
|
elfcpp::Swap<32, true>::writeval(wv, val | reloc);
|
|
}
|
|
};
|
|
|
|
// Get the GOT section, creating it if necessary.
|
|
|
|
template<int size, bool big_endian>
|
|
Output_data_got<size, big_endian>*
|
|
Target_sparc<size, big_endian>::got_section(Symbol_table* symtab,
|
|
Layout* layout)
|
|
{
|
|
if (this->got_ == NULL)
|
|
{
|
|
gold_assert(symtab != NULL && layout != NULL);
|
|
|
|
this->got_ = new Output_data_got<size, big_endian>();
|
|
|
|
layout->add_output_section_data(".got", elfcpp::SHT_PROGBITS,
|
|
(elfcpp::SHF_ALLOC
|
|
| elfcpp::SHF_WRITE),
|
|
this->got_, ORDER_RELRO, true);
|
|
|
|
// Define _GLOBAL_OFFSET_TABLE_ at the start of the .got section.
|
|
symtab->define_in_output_data("_GLOBAL_OFFSET_TABLE_", NULL,
|
|
Symbol_table::PREDEFINED,
|
|
this->got_,
|
|
0, 0, elfcpp::STT_OBJECT,
|
|
elfcpp::STB_LOCAL,
|
|
elfcpp::STV_HIDDEN, 0,
|
|
false, false);
|
|
}
|
|
|
|
return this->got_;
|
|
}
|
|
|
|
// Get the dynamic reloc section, creating it if necessary.
|
|
|
|
template<int size, bool big_endian>
|
|
typename Target_sparc<size, big_endian>::Reloc_section*
|
|
Target_sparc<size, big_endian>::rela_dyn_section(Layout* layout)
|
|
{
|
|
if (this->rela_dyn_ == NULL)
|
|
{
|
|
gold_assert(layout != NULL);
|
|
this->rela_dyn_ = new Reloc_section(parameters->options().combreloc());
|
|
layout->add_output_section_data(".rela.dyn", elfcpp::SHT_RELA,
|
|
elfcpp::SHF_ALLOC, this->rela_dyn_,
|
|
ORDER_DYNAMIC_RELOCS, false);
|
|
}
|
|
return this->rela_dyn_;
|
|
}
|
|
|
|
// Get the section to use for IFUNC relocs, creating it if
|
|
// necessary. These go in .rela.dyn, but only after all other dynamic
|
|
// relocations. They need to follow the other dynamic relocations so
|
|
// that they can refer to global variables initialized by those
|
|
// relocs.
|
|
|
|
template<int size, bool big_endian>
|
|
typename Target_sparc<size, big_endian>::Reloc_section*
|
|
Target_sparc<size, big_endian>::rela_ifunc_section(Layout* layout)
|
|
{
|
|
if (this->rela_ifunc_ == NULL)
|
|
{
|
|
// Make sure we have already created the dynamic reloc section.
|
|
this->rela_dyn_section(layout);
|
|
this->rela_ifunc_ = new Reloc_section(false);
|
|
layout->add_output_section_data(".rela.dyn", elfcpp::SHT_RELA,
|
|
elfcpp::SHF_ALLOC, this->rela_ifunc_,
|
|
ORDER_DYNAMIC_RELOCS, false);
|
|
gold_assert(this->rela_dyn_->output_section()
|
|
== this->rela_ifunc_->output_section());
|
|
}
|
|
return this->rela_ifunc_;
|
|
}
|
|
|
|
// A class to handle the PLT data.
|
|
|
|
template<int size, bool big_endian>
|
|
class Output_data_plt_sparc : public Output_section_data
|
|
{
|
|
public:
|
|
typedef Output_data_reloc<elfcpp::SHT_RELA, true,
|
|
size, big_endian> Reloc_section;
|
|
|
|
Output_data_plt_sparc(Layout*);
|
|
|
|
// Add an entry to the PLT.
|
|
void add_entry(Symbol_table* symtab, Layout* layout, Symbol* gsym);
|
|
|
|
// Add an entry to the PLT for a local STT_GNU_IFUNC symbol.
|
|
unsigned int
|
|
add_local_ifunc_entry(Symbol_table*, Layout*,
|
|
Sized_relobj_file<size, big_endian>* relobj,
|
|
unsigned int local_sym_index);
|
|
|
|
// Return the .rela.plt section data.
|
|
const Reloc_section* rel_plt() const
|
|
{
|
|
return this->rel_;
|
|
}
|
|
|
|
// Return where the IFUNC relocations should go.
|
|
Reloc_section*
|
|
rela_ifunc(Symbol_table*, Layout*);
|
|
|
|
void
|
|
emit_pending_ifunc_relocs();
|
|
|
|
// Return whether we created a section for IFUNC relocations.
|
|
bool
|
|
has_ifunc_section() const
|
|
{ return this->ifunc_rel_ != NULL; }
|
|
|
|
// Return the number of PLT entries.
|
|
unsigned int
|
|
entry_count() const
|
|
{ return this->count_ + this->ifunc_count_; }
|
|
|
|
// Return the offset of the first non-reserved PLT entry.
|
|
static unsigned int
|
|
first_plt_entry_offset()
|
|
{ return 4 * base_plt_entry_size; }
|
|
|
|
// Return the size of a PLT entry.
|
|
static unsigned int
|
|
get_plt_entry_size()
|
|
{ return base_plt_entry_size; }
|
|
|
|
// Return the PLT address to use for a global symbol.
|
|
uint64_t
|
|
address_for_global(const Symbol*);
|
|
|
|
// Return the PLT address to use for a local symbol.
|
|
uint64_t
|
|
address_for_local(const Relobj*, unsigned int symndx);
|
|
|
|
protected:
|
|
void do_adjust_output_section(Output_section* os);
|
|
|
|
// Write to a map file.
|
|
void
|
|
do_print_to_mapfile(Mapfile* mapfile) const
|
|
{ mapfile->print_output_data(this, _("** PLT")); }
|
|
|
|
private:
|
|
// The size of an entry in the PLT.
|
|
static const int base_plt_entry_size = (size == 32 ? 12 : 32);
|
|
|
|
static const unsigned int plt_entries_per_block = 160;
|
|
static const unsigned int plt_insn_chunk_size = 24;
|
|
static const unsigned int plt_pointer_chunk_size = 8;
|
|
static const unsigned int plt_block_size =
|
|
(plt_entries_per_block
|
|
* (plt_insn_chunk_size + plt_pointer_chunk_size));
|
|
|
|
section_offset_type
|
|
plt_index_to_offset(unsigned int index)
|
|
{
|
|
section_offset_type offset;
|
|
|
|
if (size == 32 || index < 32768)
|
|
offset = index * base_plt_entry_size;
|
|
else
|
|
{
|
|
unsigned int ext_index = index - 32768;
|
|
|
|
offset = (32768 * base_plt_entry_size)
|
|
+ ((ext_index / plt_entries_per_block)
|
|
* plt_block_size)
|
|
+ ((ext_index % plt_entries_per_block)
|
|
* plt_insn_chunk_size);
|
|
}
|
|
return offset;
|
|
}
|
|
|
|
// Set the final size.
|
|
void
|
|
set_final_data_size()
|
|
{
|
|
unsigned int full_count = this->entry_count() + 4;
|
|
unsigned int extra = (size == 32 ? 4 : 0);
|
|
section_offset_type sz = plt_index_to_offset(full_count) + extra;
|
|
|
|
return this->set_data_size(sz);
|
|
}
|
|
|
|
// Write out the PLT data.
|
|
void
|
|
do_write(Output_file*);
|
|
|
|
struct Global_ifunc
|
|
{
|
|
Reloc_section* rel;
|
|
Symbol* gsym;
|
|
unsigned int plt_index;
|
|
};
|
|
|
|
struct Local_ifunc
|
|
{
|
|
Reloc_section* rel;
|
|
Sized_relobj_file<size, big_endian>* object;
|
|
unsigned int local_sym_index;
|
|
unsigned int plt_index;
|
|
};
|
|
|
|
// The reloc section.
|
|
Reloc_section* rel_;
|
|
// The IFUNC relocations, if necessary. These must follow the
|
|
// regular relocations.
|
|
Reloc_section* ifunc_rel_;
|
|
// The number of PLT entries.
|
|
unsigned int count_;
|
|
// The number of PLT entries for IFUNC symbols.
|
|
unsigned int ifunc_count_;
|
|
// Global STT_GNU_IFUNC symbols.
|
|
std::vector<Global_ifunc> global_ifuncs_;
|
|
// Local STT_GNU_IFUNC symbols.
|
|
std::vector<Local_ifunc> local_ifuncs_;
|
|
};
|
|
|
|
// Define the constants as required by C++ standard.
|
|
|
|
template<int size, bool big_endian>
|
|
const int Output_data_plt_sparc<size, big_endian>::base_plt_entry_size;
|
|
|
|
template<int size, bool big_endian>
|
|
const unsigned int
|
|
Output_data_plt_sparc<size, big_endian>::plt_entries_per_block;
|
|
|
|
template<int size, bool big_endian>
|
|
const unsigned int Output_data_plt_sparc<size, big_endian>::plt_insn_chunk_size;
|
|
|
|
template<int size, bool big_endian>
|
|
const unsigned int
|
|
Output_data_plt_sparc<size, big_endian>::plt_pointer_chunk_size;
|
|
|
|
template<int size, bool big_endian>
|
|
const unsigned int Output_data_plt_sparc<size, big_endian>::plt_block_size;
|
|
|
|
// Create the PLT section. The ordinary .got section is an argument,
|
|
// since we need to refer to the start.
|
|
|
|
template<int size, bool big_endian>
|
|
Output_data_plt_sparc<size, big_endian>::Output_data_plt_sparc(Layout* layout)
|
|
: Output_section_data(size == 32 ? 4 : 8), ifunc_rel_(NULL),
|
|
count_(0), ifunc_count_(0), global_ifuncs_(), local_ifuncs_()
|
|
{
|
|
this->rel_ = new Reloc_section(false);
|
|
layout->add_output_section_data(".rela.plt", elfcpp::SHT_RELA,
|
|
elfcpp::SHF_ALLOC, this->rel_,
|
|
ORDER_DYNAMIC_PLT_RELOCS, false);
|
|
}
|
|
|
|
template<int size, bool big_endian>
|
|
void
|
|
Output_data_plt_sparc<size, big_endian>::do_adjust_output_section(Output_section* os)
|
|
{
|
|
os->set_entsize(0);
|
|
}
|
|
|
|
// Add an entry to the PLT.
|
|
|
|
template<int size, bool big_endian>
|
|
void
|
|
Output_data_plt_sparc<size, big_endian>::add_entry(Symbol_table* symtab,
|
|
Layout* layout,
|
|
Symbol* gsym)
|
|
{
|
|
gold_assert(!gsym->has_plt_offset());
|
|
|
|
section_offset_type plt_offset;
|
|
unsigned int index;
|
|
|
|
if (gsym->type() == elfcpp::STT_GNU_IFUNC
|
|
&& gsym->can_use_relative_reloc(false))
|
|
{
|
|
index = this->ifunc_count_;
|
|
plt_offset = plt_index_to_offset(index);
|
|
gsym->set_plt_offset(plt_offset);
|
|
++this->ifunc_count_;
|
|
Reloc_section* rel = this->rela_ifunc(symtab, layout);
|
|
|
|
struct Global_ifunc gi;
|
|
gi.rel = rel;
|
|
gi.gsym = gsym;
|
|
gi.plt_index = index;
|
|
this->global_ifuncs_.push_back(gi);
|
|
}
|
|
else
|
|
{
|
|
plt_offset = plt_index_to_offset(this->count_ + 4);
|
|
gsym->set_plt_offset(plt_offset);
|
|
++this->count_;
|
|
gsym->set_needs_dynsym_entry();
|
|
this->rel_->add_global(gsym, elfcpp::R_SPARC_JMP_SLOT, this,
|
|
plt_offset, 0);
|
|
}
|
|
|
|
// Note that we don't need to save the symbol. The contents of the
|
|
// PLT are independent of which symbols are used. The symbols only
|
|
// appear in the relocations.
|
|
}
|
|
|
|
template<int size, bool big_endian>
|
|
unsigned int
|
|
Output_data_plt_sparc<size, big_endian>::add_local_ifunc_entry(
|
|
Symbol_table* symtab,
|
|
Layout* layout,
|
|
Sized_relobj_file<size, big_endian>* relobj,
|
|
unsigned int local_sym_index)
|
|
{
|
|
unsigned int index = this->ifunc_count_;
|
|
section_offset_type plt_offset;
|
|
|
|
plt_offset = plt_index_to_offset(index);
|
|
++this->ifunc_count_;
|
|
|
|
Reloc_section* rel = this->rela_ifunc(symtab, layout);
|
|
|
|
struct Local_ifunc li;
|
|
li.rel = rel;
|
|
li.object = relobj;
|
|
li.local_sym_index = local_sym_index;
|
|
li.plt_index = index;
|
|
this->local_ifuncs_.push_back(li);
|
|
|
|
return plt_offset;
|
|
}
|
|
|
|
// Emit any pending IFUNC plt relocations.
|
|
|
|
template<int size, bool big_endian>
|
|
void
|
|
Output_data_plt_sparc<size, big_endian>::emit_pending_ifunc_relocs()
|
|
{
|
|
// Emit any pending IFUNC relocs.
|
|
for (typename std::vector<Global_ifunc>::const_iterator p =
|
|
this->global_ifuncs_.begin();
|
|
p != this->global_ifuncs_.end();
|
|
++p)
|
|
{
|
|
section_offset_type plt_offset;
|
|
unsigned int index;
|
|
|
|
index = this->count_ + p->plt_index + 4;
|
|
plt_offset = this->plt_index_to_offset(index);
|
|
p->rel->add_symbolless_global_addend(p->gsym, elfcpp::R_SPARC_JMP_IREL,
|
|
this, plt_offset, 0);
|
|
}
|
|
|
|
for (typename std::vector<Local_ifunc>::const_iterator p =
|
|
this->local_ifuncs_.begin();
|
|
p != this->local_ifuncs_.end();
|
|
++p)
|
|
{
|
|
section_offset_type plt_offset;
|
|
unsigned int index;
|
|
|
|
index = this->count_ + p->plt_index + 4;
|
|
plt_offset = this->plt_index_to_offset(index);
|
|
p->rel->add_symbolless_local_addend(p->object, p->local_sym_index,
|
|
elfcpp::R_SPARC_JMP_IREL,
|
|
this, plt_offset, 0);
|
|
}
|
|
}
|
|
|
|
// Return where the IFUNC relocations should go in the PLT. These
|
|
// follow the non-IFUNC relocations.
|
|
|
|
template<int size, bool big_endian>
|
|
typename Output_data_plt_sparc<size, big_endian>::Reloc_section*
|
|
Output_data_plt_sparc<size, big_endian>::rela_ifunc(
|
|
Symbol_table* symtab,
|
|
Layout* layout)
|
|
{
|
|
if (this->ifunc_rel_ == NULL)
|
|
{
|
|
this->ifunc_rel_ = new Reloc_section(false);
|
|
layout->add_output_section_data(".rela.plt", elfcpp::SHT_RELA,
|
|
elfcpp::SHF_ALLOC, this->ifunc_rel_,
|
|
ORDER_DYNAMIC_PLT_RELOCS, false);
|
|
gold_assert(this->ifunc_rel_->output_section()
|
|
== this->rel_->output_section());
|
|
|
|
if (parameters->doing_static_link())
|
|
{
|
|
// A statically linked executable will only have a .rel.plt
|
|
// section to hold R_SPARC_IRELATIVE and R_SPARC_JMP_IREL
|
|
// relocs for STT_GNU_IFUNC symbols. The library will use
|
|
// these symbols to locate the IRELATIVE and JMP_IREL relocs
|
|
// at program startup time.
|
|
symtab->define_in_output_data("__rela_iplt_start", NULL,
|
|
Symbol_table::PREDEFINED,
|
|
this->ifunc_rel_, 0, 0,
|
|
elfcpp::STT_NOTYPE, elfcpp::STB_GLOBAL,
|
|
elfcpp::STV_HIDDEN, 0, false, true);
|
|
symtab->define_in_output_data("__rela_iplt_end", NULL,
|
|
Symbol_table::PREDEFINED,
|
|
this->ifunc_rel_, 0, 0,
|
|
elfcpp::STT_NOTYPE, elfcpp::STB_GLOBAL,
|
|
elfcpp::STV_HIDDEN, 0, true, true);
|
|
}
|
|
}
|
|
return this->ifunc_rel_;
|
|
}
|
|
|
|
// Return the PLT address to use for a global symbol.
|
|
|
|
template<int size, bool big_endian>
|
|
uint64_t
|
|
Output_data_plt_sparc<size, big_endian>::address_for_global(const Symbol* gsym)
|
|
{
|
|
uint64_t offset = 0;
|
|
if (gsym->type() == elfcpp::STT_GNU_IFUNC
|
|
&& gsym->can_use_relative_reloc(false))
|
|
offset = plt_index_to_offset(this->count_ + 4);
|
|
return this->address() + offset + gsym->plt_offset();
|
|
}
|
|
|
|
// Return the PLT address to use for a local symbol. These are always
|
|
// IRELATIVE relocs.
|
|
|
|
template<int size, bool big_endian>
|
|
uint64_t
|
|
Output_data_plt_sparc<size, big_endian>::address_for_local(
|
|
const Relobj* object,
|
|
unsigned int r_sym)
|
|
{
|
|
return (this->address()
|
|
+ plt_index_to_offset(this->count_ + 4)
|
|
+ object->local_plt_offset(r_sym));
|
|
}
|
|
|
|
static const unsigned int sparc_nop = 0x01000000;
|
|
static const unsigned int sparc_sethi_g1 = 0x03000000;
|
|
static const unsigned int sparc_branch_always = 0x30800000;
|
|
static const unsigned int sparc_branch_always_pt = 0x30680000;
|
|
static const unsigned int sparc_mov = 0x80100000;
|
|
static const unsigned int sparc_mov_g0_o0 = 0x90100000;
|
|
static const unsigned int sparc_mov_o7_g5 = 0x8a10000f;
|
|
static const unsigned int sparc_call_plus_8 = 0x40000002;
|
|
static const unsigned int sparc_ldx_o7_imm_g1 = 0xc25be000;
|
|
static const unsigned int sparc_jmpl_o7_g1_g1 = 0x83c3c001;
|
|
static const unsigned int sparc_mov_g5_o7 = 0x9e100005;
|
|
|
|
// Write out the PLT.
|
|
|
|
template<int size, bool big_endian>
|
|
void
|
|
Output_data_plt_sparc<size, big_endian>::do_write(Output_file* of)
|
|
{
|
|
const off_t offset = this->offset();
|
|
const section_size_type oview_size =
|
|
convert_to_section_size_type(this->data_size());
|
|
unsigned char* const oview = of->get_output_view(offset, oview_size);
|
|
unsigned char* pov = oview;
|
|
|
|
memset(pov, 0, base_plt_entry_size * 4);
|
|
pov += this->first_plt_entry_offset();
|
|
|
|
unsigned int plt_offset = base_plt_entry_size * 4;
|
|
const unsigned int count = this->entry_count();
|
|
|
|
if (size == 64)
|
|
{
|
|
unsigned int limit;
|
|
|
|
limit = (count > 32768 ? 32768 : count);
|
|
|
|
for (unsigned int i = 0; i < limit; ++i)
|
|
{
|
|
elfcpp::Swap<32, true>::writeval(pov + 0x00,
|
|
sparc_sethi_g1 + plt_offset);
|
|
elfcpp::Swap<32, true>::writeval(pov + 0x04,
|
|
sparc_branch_always_pt +
|
|
(((base_plt_entry_size -
|
|
(plt_offset + 4)) >> 2) &
|
|
0x7ffff));
|
|
elfcpp::Swap<32, true>::writeval(pov + 0x08, sparc_nop);
|
|
elfcpp::Swap<32, true>::writeval(pov + 0x0c, sparc_nop);
|
|
elfcpp::Swap<32, true>::writeval(pov + 0x10, sparc_nop);
|
|
elfcpp::Swap<32, true>::writeval(pov + 0x14, sparc_nop);
|
|
elfcpp::Swap<32, true>::writeval(pov + 0x18, sparc_nop);
|
|
elfcpp::Swap<32, true>::writeval(pov + 0x1c, sparc_nop);
|
|
|
|
pov += base_plt_entry_size;
|
|
plt_offset += base_plt_entry_size;
|
|
}
|
|
|
|
if (count > 32768)
|
|
{
|
|
unsigned int ext_cnt = count - 32768;
|
|
unsigned int blks = ext_cnt / plt_entries_per_block;
|
|
|
|
for (unsigned int i = 0; i < blks; ++i)
|
|
{
|
|
unsigned int data_off = (plt_entries_per_block
|
|
* plt_insn_chunk_size) - 4;
|
|
|
|
for (unsigned int j = 0; j < plt_entries_per_block; ++j)
|
|
{
|
|
elfcpp::Swap<32, true>::writeval(pov + 0x00,
|
|
sparc_mov_o7_g5);
|
|
elfcpp::Swap<32, true>::writeval(pov + 0x04,
|
|
sparc_call_plus_8);
|
|
elfcpp::Swap<32, true>::writeval(pov + 0x08,
|
|
sparc_nop);
|
|
elfcpp::Swap<32, true>::writeval(pov + 0x0c,
|
|
sparc_ldx_o7_imm_g1 +
|
|
(data_off & 0x1fff));
|
|
elfcpp::Swap<32, true>::writeval(pov + 0x10,
|
|
sparc_jmpl_o7_g1_g1);
|
|
elfcpp::Swap<32, true>::writeval(pov + 0x14,
|
|
sparc_mov_g5_o7);
|
|
|
|
elfcpp::Swap<64, big_endian>::writeval(
|
|
pov + 0x4 + data_off,
|
|
(elfcpp::Elf_Xword) (oview - (pov + 0x04)));
|
|
|
|
pov += plt_insn_chunk_size;
|
|
data_off -= 16;
|
|
}
|
|
}
|
|
|
|
unsigned int sub_blk_cnt = ext_cnt % plt_entries_per_block;
|
|
for (unsigned int i = 0; i < sub_blk_cnt; ++i)
|
|
{
|
|
unsigned int data_off = (sub_blk_cnt
|
|
* plt_insn_chunk_size) - 4;
|
|
|
|
for (unsigned int j = 0; j < plt_entries_per_block; ++j)
|
|
{
|
|
elfcpp::Swap<32, true>::writeval(pov + 0x00,
|
|
sparc_mov_o7_g5);
|
|
elfcpp::Swap<32, true>::writeval(pov + 0x04,
|
|
sparc_call_plus_8);
|
|
elfcpp::Swap<32, true>::writeval(pov + 0x08,
|
|
sparc_nop);
|
|
elfcpp::Swap<32, true>::writeval(pov + 0x0c,
|
|
sparc_ldx_o7_imm_g1 +
|
|
(data_off & 0x1fff));
|
|
elfcpp::Swap<32, true>::writeval(pov + 0x10,
|
|
sparc_jmpl_o7_g1_g1);
|
|
elfcpp::Swap<32, true>::writeval(pov + 0x14,
|
|
sparc_mov_g5_o7);
|
|
|
|
elfcpp::Swap<64, big_endian>::writeval(
|
|
pov + 0x4 + data_off,
|
|
(elfcpp::Elf_Xword) (oview - (pov + 0x04)));
|
|
|
|
pov += plt_insn_chunk_size;
|
|
data_off -= 16;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
else
|
|
{
|
|
for (unsigned int i = 0; i < count; ++i)
|
|
{
|
|
elfcpp::Swap<32, true>::writeval(pov + 0x00,
|
|
sparc_sethi_g1 + plt_offset);
|
|
elfcpp::Swap<32, true>::writeval(pov + 0x04,
|
|
sparc_branch_always +
|
|
(((- (plt_offset + 4)) >> 2) &
|
|
0x003fffff));
|
|
elfcpp::Swap<32, true>::writeval(pov + 0x08, sparc_nop);
|
|
|
|
pov += base_plt_entry_size;
|
|
plt_offset += base_plt_entry_size;
|
|
}
|
|
|
|
elfcpp::Swap<32, true>::writeval(pov, sparc_nop);
|
|
pov += 4;
|
|
}
|
|
|
|
gold_assert(static_cast<section_size_type>(pov - oview) == oview_size);
|
|
|
|
of->write_output_view(offset, oview_size, oview);
|
|
}
|
|
|
|
// Create the PLT section.
|
|
|
|
template<int size, bool big_endian>
|
|
void
|
|
Target_sparc<size, big_endian>::make_plt_section(Symbol_table* symtab,
|
|
Layout* layout)
|
|
{
|
|
// Create the GOT sections first.
|
|
this->got_section(symtab, layout);
|
|
|
|
// Ensure that .rela.dyn always appears before .rela.plt This is
|
|
// necessary due to how, on Sparc and some other targets, .rela.dyn
|
|
// needs to include .rela.plt in it's range.
|
|
this->rela_dyn_section(layout);
|
|
|
|
this->plt_ = new Output_data_plt_sparc<size, big_endian>(layout);
|
|
layout->add_output_section_data(".plt", elfcpp::SHT_PROGBITS,
|
|
(elfcpp::SHF_ALLOC
|
|
| elfcpp::SHF_EXECINSTR
|
|
| elfcpp::SHF_WRITE),
|
|
this->plt_, ORDER_NON_RELRO_FIRST, false);
|
|
|
|
// Define _PROCEDURE_LINKAGE_TABLE_ at the start of the .plt section.
|
|
symtab->define_in_output_data("_PROCEDURE_LINKAGE_TABLE_", NULL,
|
|
Symbol_table::PREDEFINED,
|
|
this->plt_,
|
|
0, 0, elfcpp::STT_OBJECT,
|
|
elfcpp::STB_LOCAL,
|
|
elfcpp::STV_HIDDEN, 0,
|
|
false, false);
|
|
}
|
|
|
|
// Create a PLT entry for a global symbol.
|
|
|
|
template<int size, bool big_endian>
|
|
void
|
|
Target_sparc<size, big_endian>::make_plt_entry(Symbol_table* symtab,
|
|
Layout* layout,
|
|
Symbol* gsym)
|
|
{
|
|
if (gsym->has_plt_offset())
|
|
return;
|
|
|
|
if (this->plt_ == NULL)
|
|
this->make_plt_section(symtab, layout);
|
|
|
|
this->plt_->add_entry(symtab, layout, gsym);
|
|
}
|
|
|
|
// Make a PLT entry for a local STT_GNU_IFUNC symbol.
|
|
|
|
template<int size, bool big_endian>
|
|
void
|
|
Target_sparc<size, big_endian>::make_local_ifunc_plt_entry(
|
|
Symbol_table* symtab,
|
|
Layout* layout,
|
|
Sized_relobj_file<size, big_endian>* relobj,
|
|
unsigned int local_sym_index)
|
|
{
|
|
if (relobj->local_has_plt_offset(local_sym_index))
|
|
return;
|
|
if (this->plt_ == NULL)
|
|
this->make_plt_section(symtab, layout);
|
|
unsigned int plt_offset = this->plt_->add_local_ifunc_entry(symtab, layout,
|
|
relobj,
|
|
local_sym_index);
|
|
relobj->set_local_plt_offset(local_sym_index, plt_offset);
|
|
}
|
|
|
|
// Return the number of entries in the PLT.
|
|
|
|
template<int size, bool big_endian>
|
|
unsigned int
|
|
Target_sparc<size, big_endian>::plt_entry_count() const
|
|
{
|
|
if (this->plt_ == NULL)
|
|
return 0;
|
|
return this->plt_->entry_count();
|
|
}
|
|
|
|
// Return the offset of the first non-reserved PLT entry.
|
|
|
|
template<int size, bool big_endian>
|
|
unsigned int
|
|
Target_sparc<size, big_endian>::first_plt_entry_offset() const
|
|
{
|
|
return Output_data_plt_sparc<size, big_endian>::first_plt_entry_offset();
|
|
}
|
|
|
|
// Return the size of each PLT entry.
|
|
|
|
template<int size, bool big_endian>
|
|
unsigned int
|
|
Target_sparc<size, big_endian>::plt_entry_size() const
|
|
{
|
|
return Output_data_plt_sparc<size, big_endian>::get_plt_entry_size();
|
|
}
|
|
|
|
// Create a GOT entry for the TLS module index.
|
|
|
|
template<int size, bool big_endian>
|
|
unsigned int
|
|
Target_sparc<size, big_endian>::got_mod_index_entry(
|
|
Symbol_table* symtab,
|
|
Layout* layout,
|
|
Sized_relobj_file<size, big_endian>* object)
|
|
{
|
|
if (this->got_mod_index_offset_ == -1U)
|
|
{
|
|
gold_assert(symtab != NULL && layout != NULL && object != NULL);
|
|
Reloc_section* rela_dyn = this->rela_dyn_section(layout);
|
|
Output_data_got<size, big_endian>* got;
|
|
unsigned int got_offset;
|
|
|
|
got = this->got_section(symtab, layout);
|
|
got_offset = got->add_constant(0);
|
|
rela_dyn->add_local(object, 0,
|
|
(size == 64 ?
|
|
elfcpp::R_SPARC_TLS_DTPMOD64 :
|
|
elfcpp::R_SPARC_TLS_DTPMOD32), got,
|
|
got_offset, 0);
|
|
got->add_constant(0);
|
|
this->got_mod_index_offset_ = got_offset;
|
|
}
|
|
return this->got_mod_index_offset_;
|
|
}
|
|
|
|
// Optimize the TLS relocation type based on what we know about the
|
|
// symbol. IS_FINAL is true if the final address of this symbol is
|
|
// known at link time.
|
|
|
|
static tls::Tls_optimization
|
|
optimize_tls_reloc(bool is_final, int r_type)
|
|
{
|
|
// If we are generating a shared library, then we can't do anything
|
|
// in the linker.
|
|
if (parameters->options().shared())
|
|
return tls::TLSOPT_NONE;
|
|
|
|
switch (r_type)
|
|
{
|
|
case elfcpp::R_SPARC_TLS_GD_HI22: // Global-dynamic
|
|
case elfcpp::R_SPARC_TLS_GD_LO10:
|
|
case elfcpp::R_SPARC_TLS_GD_ADD:
|
|
case elfcpp::R_SPARC_TLS_GD_CALL:
|
|
// These are General-Dynamic which permits fully general TLS
|
|
// access. Since we know that we are generating an executable,
|
|
// we can convert this to Initial-Exec. If we also know that
|
|
// this is a local symbol, we can further switch to Local-Exec.
|
|
if (is_final)
|
|
return tls::TLSOPT_TO_LE;
|
|
return tls::TLSOPT_TO_IE;
|
|
|
|
case elfcpp::R_SPARC_TLS_LDM_HI22: // Local-dynamic
|
|
case elfcpp::R_SPARC_TLS_LDM_LO10:
|
|
case elfcpp::R_SPARC_TLS_LDM_ADD:
|
|
case elfcpp::R_SPARC_TLS_LDM_CALL:
|
|
// This is Local-Dynamic, which refers to a local symbol in the
|
|
// dynamic TLS block. Since we know that we generating an
|
|
// executable, we can switch to Local-Exec.
|
|
return tls::TLSOPT_TO_LE;
|
|
|
|
case elfcpp::R_SPARC_TLS_LDO_HIX22: // Alternate local-dynamic
|
|
case elfcpp::R_SPARC_TLS_LDO_LOX10:
|
|
case elfcpp::R_SPARC_TLS_LDO_ADD:
|
|
// Another type of Local-Dynamic relocation.
|
|
return tls::TLSOPT_TO_LE;
|
|
|
|
case elfcpp::R_SPARC_TLS_IE_HI22: // Initial-exec
|
|
case elfcpp::R_SPARC_TLS_IE_LO10:
|
|
case elfcpp::R_SPARC_TLS_IE_LD:
|
|
case elfcpp::R_SPARC_TLS_IE_LDX:
|
|
case elfcpp::R_SPARC_TLS_IE_ADD:
|
|
// These are Initial-Exec relocs which get the thread offset
|
|
// from the GOT. If we know that we are linking against the
|
|
// local symbol, we can switch to Local-Exec, which links the
|
|
// thread offset into the instruction.
|
|
if (is_final)
|
|
return tls::TLSOPT_TO_LE;
|
|
return tls::TLSOPT_NONE;
|
|
|
|
case elfcpp::R_SPARC_TLS_LE_HIX22: // Local-exec
|
|
case elfcpp::R_SPARC_TLS_LE_LOX10:
|
|
// When we already have Local-Exec, there is nothing further we
|
|
// can do.
|
|
return tls::TLSOPT_NONE;
|
|
|
|
default:
|
|
gold_unreachable();
|
|
}
|
|
}
|
|
|
|
// Get the Reference_flags for a particular relocation.
|
|
|
|
template<int size, bool big_endian>
|
|
int
|
|
Target_sparc<size, big_endian>::Scan::get_reference_flags(unsigned int r_type)
|
|
{
|
|
r_type &= 0xff;
|
|
switch (r_type)
|
|
{
|
|
case elfcpp::R_SPARC_NONE:
|
|
case elfcpp::R_SPARC_REGISTER:
|
|
case elfcpp::R_SPARC_GNU_VTINHERIT:
|
|
case elfcpp::R_SPARC_GNU_VTENTRY:
|
|
// No symbol reference.
|
|
return 0;
|
|
|
|
case elfcpp::R_SPARC_UA64:
|
|
case elfcpp::R_SPARC_64:
|
|
case elfcpp::R_SPARC_HIX22:
|
|
case elfcpp::R_SPARC_LOX10:
|
|
case elfcpp::R_SPARC_H34:
|
|
case elfcpp::R_SPARC_H44:
|
|
case elfcpp::R_SPARC_M44:
|
|
case elfcpp::R_SPARC_L44:
|
|
case elfcpp::R_SPARC_HH22:
|
|
case elfcpp::R_SPARC_HM10:
|
|
case elfcpp::R_SPARC_LM22:
|
|
case elfcpp::R_SPARC_HI22:
|
|
case elfcpp::R_SPARC_LO10:
|
|
case elfcpp::R_SPARC_OLO10:
|
|
case elfcpp::R_SPARC_UA32:
|
|
case elfcpp::R_SPARC_32:
|
|
case elfcpp::R_SPARC_UA16:
|
|
case elfcpp::R_SPARC_16:
|
|
case elfcpp::R_SPARC_11:
|
|
case elfcpp::R_SPARC_10:
|
|
case elfcpp::R_SPARC_8:
|
|
case elfcpp::R_SPARC_7:
|
|
case elfcpp::R_SPARC_6:
|
|
case elfcpp::R_SPARC_5:
|
|
return Symbol::ABSOLUTE_REF;
|
|
|
|
case elfcpp::R_SPARC_DISP8:
|
|
case elfcpp::R_SPARC_DISP16:
|
|
case elfcpp::R_SPARC_DISP32:
|
|
case elfcpp::R_SPARC_DISP64:
|
|
case elfcpp::R_SPARC_PC_HH22:
|
|
case elfcpp::R_SPARC_PC_HM10:
|
|
case elfcpp::R_SPARC_PC_LM22:
|
|
case elfcpp::R_SPARC_PC10:
|
|
case elfcpp::R_SPARC_PC22:
|
|
case elfcpp::R_SPARC_WDISP30:
|
|
case elfcpp::R_SPARC_WDISP22:
|
|
case elfcpp::R_SPARC_WDISP19:
|
|
case elfcpp::R_SPARC_WDISP16:
|
|
case elfcpp::R_SPARC_WDISP10:
|
|
return Symbol::RELATIVE_REF;
|
|
|
|
case elfcpp::R_SPARC_PLT64:
|
|
case elfcpp::R_SPARC_PLT32:
|
|
case elfcpp::R_SPARC_HIPLT22:
|
|
case elfcpp::R_SPARC_LOPLT10:
|
|
case elfcpp::R_SPARC_PCPLT10:
|
|
return Symbol::FUNCTION_CALL | Symbol::ABSOLUTE_REF;
|
|
|
|
case elfcpp::R_SPARC_PCPLT32:
|
|
case elfcpp::R_SPARC_PCPLT22:
|
|
case elfcpp::R_SPARC_WPLT30:
|
|
return Symbol::FUNCTION_CALL | Symbol::RELATIVE_REF;
|
|
|
|
case elfcpp::R_SPARC_GOTDATA_OP:
|
|
case elfcpp::R_SPARC_GOTDATA_OP_HIX22:
|
|
case elfcpp::R_SPARC_GOTDATA_OP_LOX10:
|
|
case elfcpp::R_SPARC_GOT10:
|
|
case elfcpp::R_SPARC_GOT13:
|
|
case elfcpp::R_SPARC_GOT22:
|
|
// Absolute in GOT.
|
|
return Symbol::ABSOLUTE_REF;
|
|
|
|
case elfcpp::R_SPARC_TLS_GD_HI22: // Global-dynamic
|
|
case elfcpp::R_SPARC_TLS_GD_LO10:
|
|
case elfcpp::R_SPARC_TLS_GD_ADD:
|
|
case elfcpp::R_SPARC_TLS_GD_CALL:
|
|
case elfcpp::R_SPARC_TLS_LDM_HI22: // Local-dynamic
|
|
case elfcpp::R_SPARC_TLS_LDM_LO10:
|
|
case elfcpp::R_SPARC_TLS_LDM_ADD:
|
|
case elfcpp::R_SPARC_TLS_LDM_CALL:
|
|
case elfcpp::R_SPARC_TLS_LDO_HIX22: // Alternate local-dynamic
|
|
case elfcpp::R_SPARC_TLS_LDO_LOX10:
|
|
case elfcpp::R_SPARC_TLS_LDO_ADD:
|
|
case elfcpp::R_SPARC_TLS_LE_HIX22:
|
|
case elfcpp::R_SPARC_TLS_LE_LOX10:
|
|
case elfcpp::R_SPARC_TLS_IE_HI22: // Initial-exec
|
|
case elfcpp::R_SPARC_TLS_IE_LO10:
|
|
case elfcpp::R_SPARC_TLS_IE_LD:
|
|
case elfcpp::R_SPARC_TLS_IE_LDX:
|
|
case elfcpp::R_SPARC_TLS_IE_ADD:
|
|
return Symbol::TLS_REF;
|
|
|
|
case elfcpp::R_SPARC_COPY:
|
|
case elfcpp::R_SPARC_GLOB_DAT:
|
|
case elfcpp::R_SPARC_JMP_SLOT:
|
|
case elfcpp::R_SPARC_JMP_IREL:
|
|
case elfcpp::R_SPARC_RELATIVE:
|
|
case elfcpp::R_SPARC_IRELATIVE:
|
|
case elfcpp::R_SPARC_TLS_DTPMOD64:
|
|
case elfcpp::R_SPARC_TLS_DTPMOD32:
|
|
case elfcpp::R_SPARC_TLS_DTPOFF64:
|
|
case elfcpp::R_SPARC_TLS_DTPOFF32:
|
|
case elfcpp::R_SPARC_TLS_TPOFF64:
|
|
case elfcpp::R_SPARC_TLS_TPOFF32:
|
|
default:
|
|
// Not expected. We will give an error later.
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
// Generate a PLT entry slot for a call to __tls_get_addr
|
|
template<int size, bool big_endian>
|
|
void
|
|
Target_sparc<size, big_endian>::Scan::generate_tls_call(Symbol_table* symtab,
|
|
Layout* layout,
|
|
Target_sparc<size, big_endian>* target)
|
|
{
|
|
Symbol* gsym = target->tls_get_addr_sym(symtab);
|
|
|
|
target->make_plt_entry(symtab, layout, gsym);
|
|
}
|
|
|
|
// Report an unsupported relocation against a local symbol.
|
|
|
|
template<int size, bool big_endian>
|
|
void
|
|
Target_sparc<size, big_endian>::Scan::unsupported_reloc_local(
|
|
Sized_relobj_file<size, big_endian>* object,
|
|
unsigned int r_type)
|
|
{
|
|
gold_error(_("%s: unsupported reloc %u against local symbol"),
|
|
object->name().c_str(), r_type);
|
|
}
|
|
|
|
// We are about to emit a dynamic relocation of type R_TYPE. If the
|
|
// dynamic linker does not support it, issue an error.
|
|
|
|
template<int size, bool big_endian>
|
|
void
|
|
Target_sparc<size, big_endian>::Scan::check_non_pic(Relobj* object, unsigned int r_type)
|
|
{
|
|
gold_assert(r_type != elfcpp::R_SPARC_NONE);
|
|
|
|
if (size == 64)
|
|
{
|
|
switch (r_type)
|
|
{
|
|
// These are the relocation types supported by glibc for sparc 64-bit.
|
|
case elfcpp::R_SPARC_RELATIVE:
|
|
case elfcpp::R_SPARC_IRELATIVE:
|
|
case elfcpp::R_SPARC_COPY:
|
|
case elfcpp::R_SPARC_64:
|
|
case elfcpp::R_SPARC_GLOB_DAT:
|
|
case elfcpp::R_SPARC_JMP_SLOT:
|
|
case elfcpp::R_SPARC_JMP_IREL:
|
|
case elfcpp::R_SPARC_TLS_DTPMOD64:
|
|
case elfcpp::R_SPARC_TLS_DTPOFF64:
|
|
case elfcpp::R_SPARC_TLS_TPOFF64:
|
|
case elfcpp::R_SPARC_TLS_LE_HIX22:
|
|
case elfcpp::R_SPARC_TLS_LE_LOX10:
|
|
case elfcpp::R_SPARC_8:
|
|
case elfcpp::R_SPARC_16:
|
|
case elfcpp::R_SPARC_DISP8:
|
|
case elfcpp::R_SPARC_DISP16:
|
|
case elfcpp::R_SPARC_DISP32:
|
|
case elfcpp::R_SPARC_WDISP30:
|
|
case elfcpp::R_SPARC_LO10:
|
|
case elfcpp::R_SPARC_HI22:
|
|
case elfcpp::R_SPARC_OLO10:
|
|
case elfcpp::R_SPARC_H34:
|
|
case elfcpp::R_SPARC_H44:
|
|
case elfcpp::R_SPARC_M44:
|
|
case elfcpp::R_SPARC_L44:
|
|
case elfcpp::R_SPARC_HH22:
|
|
case elfcpp::R_SPARC_HM10:
|
|
case elfcpp::R_SPARC_LM22:
|
|
case elfcpp::R_SPARC_UA16:
|
|
case elfcpp::R_SPARC_UA32:
|
|
case elfcpp::R_SPARC_UA64:
|
|
return;
|
|
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
switch (r_type)
|
|
{
|
|
// These are the relocation types supported by glibc for sparc 32-bit.
|
|
case elfcpp::R_SPARC_RELATIVE:
|
|
case elfcpp::R_SPARC_IRELATIVE:
|
|
case elfcpp::R_SPARC_COPY:
|
|
case elfcpp::R_SPARC_GLOB_DAT:
|
|
case elfcpp::R_SPARC_32:
|
|
case elfcpp::R_SPARC_JMP_SLOT:
|
|
case elfcpp::R_SPARC_JMP_IREL:
|
|
case elfcpp::R_SPARC_TLS_DTPMOD32:
|
|
case elfcpp::R_SPARC_TLS_DTPOFF32:
|
|
case elfcpp::R_SPARC_TLS_TPOFF32:
|
|
case elfcpp::R_SPARC_TLS_LE_HIX22:
|
|
case elfcpp::R_SPARC_TLS_LE_LOX10:
|
|
case elfcpp::R_SPARC_8:
|
|
case elfcpp::R_SPARC_16:
|
|
case elfcpp::R_SPARC_DISP8:
|
|
case elfcpp::R_SPARC_DISP16:
|
|
case elfcpp::R_SPARC_DISP32:
|
|
case elfcpp::R_SPARC_LO10:
|
|
case elfcpp::R_SPARC_WDISP30:
|
|
case elfcpp::R_SPARC_HI22:
|
|
case elfcpp::R_SPARC_UA16:
|
|
case elfcpp::R_SPARC_UA32:
|
|
return;
|
|
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
|
|
// This prevents us from issuing more than one error per reloc
|
|
// section. But we can still wind up issuing more than one
|
|
// error per object file.
|
|
if (this->issued_non_pic_error_)
|
|
return;
|
|
gold_assert(parameters->options().output_is_position_independent());
|
|
object->error(_("requires unsupported dynamic reloc; "
|
|
"recompile with -fPIC"));
|
|
this->issued_non_pic_error_ = true;
|
|
return;
|
|
}
|
|
|
|
// Return whether we need to make a PLT entry for a relocation of the
|
|
// given type against a STT_GNU_IFUNC symbol.
|
|
|
|
template<int size, bool big_endian>
|
|
bool
|
|
Target_sparc<size, big_endian>::Scan::reloc_needs_plt_for_ifunc(
|
|
Sized_relobj_file<size, big_endian>* object,
|
|
unsigned int r_type)
|
|
{
|
|
int flags = Scan::get_reference_flags(r_type);
|
|
if (flags & Symbol::TLS_REF)
|
|
gold_error(_("%s: unsupported TLS reloc %u for IFUNC symbol"),
|
|
object->name().c_str(), r_type);
|
|
return flags != 0;
|
|
}
|
|
|
|
// Scan a relocation for a local symbol.
|
|
|
|
template<int size, bool big_endian>
|
|
inline void
|
|
Target_sparc<size, big_endian>::Scan::local(
|
|
Symbol_table* symtab,
|
|
Layout* layout,
|
|
Target_sparc<size, big_endian>* target,
|
|
Sized_relobj_file<size, big_endian>* object,
|
|
unsigned int data_shndx,
|
|
Output_section* output_section,
|
|
const elfcpp::Rela<size, big_endian>& reloc,
|
|
unsigned int r_type,
|
|
const elfcpp::Sym<size, big_endian>& lsym,
|
|
bool is_discarded)
|
|
{
|
|
if (is_discarded)
|
|
return;
|
|
|
|
bool is_ifunc = lsym.get_st_type() == elfcpp::STT_GNU_IFUNC;
|
|
unsigned int orig_r_type = r_type;
|
|
r_type &= 0xff;
|
|
|
|
if (is_ifunc
|
|
&& this->reloc_needs_plt_for_ifunc(object, r_type))
|
|
{
|
|
unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info());
|
|
target->make_local_ifunc_plt_entry(symtab, layout, object, r_sym);
|
|
}
|
|
|
|
switch (r_type)
|
|
{
|
|
case elfcpp::R_SPARC_NONE:
|
|
case elfcpp::R_SPARC_REGISTER:
|
|
case elfcpp::R_SPARC_GNU_VTINHERIT:
|
|
case elfcpp::R_SPARC_GNU_VTENTRY:
|
|
break;
|
|
|
|
case elfcpp::R_SPARC_64:
|
|
case elfcpp::R_SPARC_32:
|
|
// If building a shared library (or a position-independent
|
|
// executable), we need to create a dynamic relocation for
|
|
// this location. The relocation applied at link time will
|
|
// apply the link-time value, so we flag the location with
|
|
// an R_SPARC_RELATIVE relocation so the dynamic loader can
|
|
// relocate it easily.
|
|
if (parameters->options().output_is_position_independent())
|
|
{
|
|
Reloc_section* rela_dyn = target->rela_dyn_section(layout);
|
|
unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info());
|
|
rela_dyn->add_local_relative(object, r_sym, elfcpp::R_SPARC_RELATIVE,
|
|
output_section, data_shndx,
|
|
reloc.get_r_offset(),
|
|
reloc.get_r_addend(), is_ifunc);
|
|
}
|
|
break;
|
|
|
|
case elfcpp::R_SPARC_HIX22:
|
|
case elfcpp::R_SPARC_LOX10:
|
|
case elfcpp::R_SPARC_H34:
|
|
case elfcpp::R_SPARC_H44:
|
|
case elfcpp::R_SPARC_M44:
|
|
case elfcpp::R_SPARC_L44:
|
|
case elfcpp::R_SPARC_HH22:
|
|
case elfcpp::R_SPARC_HM10:
|
|
case elfcpp::R_SPARC_LM22:
|
|
case elfcpp::R_SPARC_UA64:
|
|
case elfcpp::R_SPARC_UA32:
|
|
case elfcpp::R_SPARC_UA16:
|
|
case elfcpp::R_SPARC_HI22:
|
|
case elfcpp::R_SPARC_LO10:
|
|
case elfcpp::R_SPARC_OLO10:
|
|
case elfcpp::R_SPARC_16:
|
|
case elfcpp::R_SPARC_11:
|
|
case elfcpp::R_SPARC_10:
|
|
case elfcpp::R_SPARC_8:
|
|
case elfcpp::R_SPARC_7:
|
|
case elfcpp::R_SPARC_6:
|
|
case elfcpp::R_SPARC_5:
|
|
// If building a shared library (or a position-independent
|
|
// executable), we need to create a dynamic relocation for
|
|
// this location.
|
|
if (parameters->options().output_is_position_independent())
|
|
{
|
|
Reloc_section* rela_dyn = target->rela_dyn_section(layout);
|
|
unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info());
|
|
|
|
check_non_pic(object, r_type);
|
|
if (lsym.get_st_type() != elfcpp::STT_SECTION)
|
|
{
|
|
rela_dyn->add_local(object, r_sym, orig_r_type, output_section,
|
|
data_shndx, reloc.get_r_offset(),
|
|
reloc.get_r_addend());
|
|
}
|
|
else
|
|
{
|
|
gold_assert(lsym.get_st_value() == 0);
|
|
rela_dyn->add_symbolless_local_addend(object, r_sym, orig_r_type,
|
|
output_section, data_shndx,
|
|
reloc.get_r_offset(),
|
|
reloc.get_r_addend());
|
|
}
|
|
}
|
|
break;
|
|
|
|
case elfcpp::R_SPARC_WDISP30:
|
|
case elfcpp::R_SPARC_WPLT30:
|
|
case elfcpp::R_SPARC_WDISP22:
|
|
case elfcpp::R_SPARC_WDISP19:
|
|
case elfcpp::R_SPARC_WDISP16:
|
|
case elfcpp::R_SPARC_WDISP10:
|
|
case elfcpp::R_SPARC_DISP8:
|
|
case elfcpp::R_SPARC_DISP16:
|
|
case elfcpp::R_SPARC_DISP32:
|
|
case elfcpp::R_SPARC_DISP64:
|
|
case elfcpp::R_SPARC_PC10:
|
|
case elfcpp::R_SPARC_PC22:
|
|
break;
|
|
|
|
case elfcpp::R_SPARC_GOTDATA_OP:
|
|
case elfcpp::R_SPARC_GOTDATA_OP_HIX22:
|
|
case elfcpp::R_SPARC_GOTDATA_OP_LOX10:
|
|
// We will optimize this into a GOT relative relocation
|
|
// and code transform the GOT load into an addition.
|
|
break;
|
|
|
|
case elfcpp::R_SPARC_GOT10:
|
|
case elfcpp::R_SPARC_GOT13:
|
|
case elfcpp::R_SPARC_GOT22:
|
|
{
|
|
// The symbol requires a GOT entry.
|
|
Output_data_got<size, big_endian>* got;
|
|
unsigned int r_sym;
|
|
|
|
got = target->got_section(symtab, layout);
|
|
r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info());
|
|
|
|
// If we are generating a shared object, we need to add a
|
|
// dynamic relocation for this symbol's GOT entry.
|
|
if (parameters->options().output_is_position_independent())
|
|
{
|
|
if (!object->local_has_got_offset(r_sym, GOT_TYPE_STANDARD))
|
|
{
|
|
Reloc_section* rela_dyn = target->rela_dyn_section(layout);
|
|
unsigned int off = got->add_constant(0);
|
|
object->set_local_got_offset(r_sym, GOT_TYPE_STANDARD, off);
|
|
rela_dyn->add_local_relative(object, r_sym,
|
|
elfcpp::R_SPARC_RELATIVE,
|
|
got, off, 0, is_ifunc);
|
|
}
|
|
}
|
|
else
|
|
got->add_local(object, r_sym, GOT_TYPE_STANDARD);
|
|
}
|
|
break;
|
|
|
|
// These are initial TLS relocs, which are expected when
|
|
// linking.
|
|
case elfcpp::R_SPARC_TLS_GD_HI22: // Global-dynamic
|
|
case elfcpp::R_SPARC_TLS_GD_LO10:
|
|
case elfcpp::R_SPARC_TLS_GD_ADD:
|
|
case elfcpp::R_SPARC_TLS_GD_CALL:
|
|
case elfcpp::R_SPARC_TLS_LDM_HI22 : // Local-dynamic
|
|
case elfcpp::R_SPARC_TLS_LDM_LO10:
|
|
case elfcpp::R_SPARC_TLS_LDM_ADD:
|
|
case elfcpp::R_SPARC_TLS_LDM_CALL:
|
|
case elfcpp::R_SPARC_TLS_LDO_HIX22: // Alternate local-dynamic
|
|
case elfcpp::R_SPARC_TLS_LDO_LOX10:
|
|
case elfcpp::R_SPARC_TLS_LDO_ADD:
|
|
case elfcpp::R_SPARC_TLS_IE_HI22: // Initial-exec
|
|
case elfcpp::R_SPARC_TLS_IE_LO10:
|
|
case elfcpp::R_SPARC_TLS_IE_LD:
|
|
case elfcpp::R_SPARC_TLS_IE_LDX:
|
|
case elfcpp::R_SPARC_TLS_IE_ADD:
|
|
case elfcpp::R_SPARC_TLS_LE_HIX22: // Local-exec
|
|
case elfcpp::R_SPARC_TLS_LE_LOX10:
|
|
{
|
|
bool output_is_shared = parameters->options().shared();
|
|
const tls::Tls_optimization optimized_type
|
|
= optimize_tls_reloc(!output_is_shared, r_type);
|
|
switch (r_type)
|
|
{
|
|
case elfcpp::R_SPARC_TLS_GD_HI22: // Global-dynamic
|
|
case elfcpp::R_SPARC_TLS_GD_LO10:
|
|
case elfcpp::R_SPARC_TLS_GD_ADD:
|
|
case elfcpp::R_SPARC_TLS_GD_CALL:
|
|
if (optimized_type == tls::TLSOPT_NONE)
|
|
{
|
|
// Create a pair of GOT entries for the module index and
|
|
// dtv-relative offset.
|
|
Output_data_got<size, big_endian>* got
|
|
= target->got_section(symtab, layout);
|
|
unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info());
|
|
unsigned int shndx = lsym.get_st_shndx();
|
|
bool is_ordinary;
|
|
shndx = object->adjust_sym_shndx(r_sym, shndx, &is_ordinary);
|
|
if (!is_ordinary)
|
|
object->error(_("local symbol %u has bad shndx %u"),
|
|
r_sym, shndx);
|
|
else
|
|
got->add_local_pair_with_rel(object, r_sym,
|
|
lsym.get_st_shndx(),
|
|
GOT_TYPE_TLS_PAIR,
|
|
target->rela_dyn_section(layout),
|
|
(size == 64
|
|
? elfcpp::R_SPARC_TLS_DTPMOD64
|
|
: elfcpp::R_SPARC_TLS_DTPMOD32));
|
|
if (r_type == elfcpp::R_SPARC_TLS_GD_CALL)
|
|
generate_tls_call(symtab, layout, target);
|
|
}
|
|
else if (optimized_type != tls::TLSOPT_TO_LE)
|
|
unsupported_reloc_local(object, r_type);
|
|
break;
|
|
|
|
case elfcpp::R_SPARC_TLS_LDM_HI22 : // Local-dynamic
|
|
case elfcpp::R_SPARC_TLS_LDM_LO10:
|
|
case elfcpp::R_SPARC_TLS_LDM_ADD:
|
|
case elfcpp::R_SPARC_TLS_LDM_CALL:
|
|
if (optimized_type == tls::TLSOPT_NONE)
|
|
{
|
|
// Create a GOT entry for the module index.
|
|
target->got_mod_index_entry(symtab, layout, object);
|
|
|
|
if (r_type == elfcpp::R_SPARC_TLS_LDM_CALL)
|
|
generate_tls_call(symtab, layout, target);
|
|
}
|
|
else if (optimized_type != tls::TLSOPT_TO_LE)
|
|
unsupported_reloc_local(object, r_type);
|
|
break;
|
|
|
|
case elfcpp::R_SPARC_TLS_LDO_HIX22: // Alternate local-dynamic
|
|
case elfcpp::R_SPARC_TLS_LDO_LOX10:
|
|
case elfcpp::R_SPARC_TLS_LDO_ADD:
|
|
break;
|
|
|
|
case elfcpp::R_SPARC_TLS_IE_HI22: // Initial-exec
|
|
case elfcpp::R_SPARC_TLS_IE_LO10:
|
|
case elfcpp::R_SPARC_TLS_IE_LD:
|
|
case elfcpp::R_SPARC_TLS_IE_LDX:
|
|
case elfcpp::R_SPARC_TLS_IE_ADD:
|
|
layout->set_has_static_tls();
|
|
if (optimized_type == tls::TLSOPT_NONE)
|
|
{
|
|
// Create a GOT entry for the tp-relative offset.
|
|
Output_data_got<size, big_endian>* got
|
|
= target->got_section(symtab, layout);
|
|
unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info());
|
|
|
|
if (!object->local_has_got_offset(r_sym, GOT_TYPE_TLS_OFFSET))
|
|
{
|
|
Reloc_section* rela_dyn = target->rela_dyn_section(layout);
|
|
unsigned int off = got->add_constant(0);
|
|
|
|
object->set_local_got_offset(r_sym, GOT_TYPE_TLS_OFFSET, off);
|
|
|
|
rela_dyn->add_symbolless_local_addend(object, r_sym,
|
|
(size == 64 ?
|
|
elfcpp::R_SPARC_TLS_TPOFF64 :
|
|
elfcpp::R_SPARC_TLS_TPOFF32),
|
|
got, off, 0);
|
|
}
|
|
}
|
|
else if (optimized_type != tls::TLSOPT_TO_LE)
|
|
unsupported_reloc_local(object, r_type);
|
|
break;
|
|
|
|
case elfcpp::R_SPARC_TLS_LE_HIX22: // Local-exec
|
|
case elfcpp::R_SPARC_TLS_LE_LOX10:
|
|
layout->set_has_static_tls();
|
|
if (output_is_shared)
|
|
{
|
|
// We need to create a dynamic relocation.
|
|
gold_assert(lsym.get_st_type() != elfcpp::STT_SECTION);
|
|
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_symbolless_local_addend(object, r_sym, r_type,
|
|
output_section, data_shndx,
|
|
reloc.get_r_offset(), 0);
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
break;
|
|
|
|
// These are relocations which should only be seen by the
|
|
// dynamic linker, and should never be seen here.
|
|
case elfcpp::R_SPARC_COPY:
|
|
case elfcpp::R_SPARC_GLOB_DAT:
|
|
case elfcpp::R_SPARC_JMP_SLOT:
|
|
case elfcpp::R_SPARC_JMP_IREL:
|
|
case elfcpp::R_SPARC_RELATIVE:
|
|
case elfcpp::R_SPARC_IRELATIVE:
|
|
case elfcpp::R_SPARC_TLS_DTPMOD64:
|
|
case elfcpp::R_SPARC_TLS_DTPMOD32:
|
|
case elfcpp::R_SPARC_TLS_DTPOFF64:
|
|
case elfcpp::R_SPARC_TLS_DTPOFF32:
|
|
case elfcpp::R_SPARC_TLS_TPOFF64:
|
|
case elfcpp::R_SPARC_TLS_TPOFF32:
|
|
gold_error(_("%s: unexpected reloc %u in object file"),
|
|
object->name().c_str(), r_type);
|
|
break;
|
|
|
|
default:
|
|
unsupported_reloc_local(object, r_type);
|
|
break;
|
|
}
|
|
}
|
|
|
|
// Report an unsupported relocation against a global symbol.
|
|
|
|
template<int size, bool big_endian>
|
|
void
|
|
Target_sparc<size, big_endian>::Scan::unsupported_reloc_global(
|
|
Sized_relobj_file<size, big_endian>* object,
|
|
unsigned int r_type,
|
|
Symbol* gsym)
|
|
{
|
|
gold_error(_("%s: unsupported reloc %u against global symbol %s"),
|
|
object->name().c_str(), r_type, gsym->demangled_name().c_str());
|
|
}
|
|
|
|
// Scan a relocation for a global symbol.
|
|
|
|
template<int size, bool big_endian>
|
|
inline void
|
|
Target_sparc<size, big_endian>::Scan::global(
|
|
Symbol_table* symtab,
|
|
Layout* layout,
|
|
Target_sparc<size, big_endian>* target,
|
|
Sized_relobj_file<size, big_endian>* object,
|
|
unsigned int data_shndx,
|
|
Output_section* output_section,
|
|
const elfcpp::Rela<size, big_endian>& reloc,
|
|
unsigned int r_type,
|
|
Symbol* gsym)
|
|
{
|
|
unsigned int orig_r_type = r_type;
|
|
bool is_ifunc = gsym->type() == elfcpp::STT_GNU_IFUNC;
|
|
|
|
// A reference to _GLOBAL_OFFSET_TABLE_ implies that we need a got
|
|
// section. We check here to avoid creating a dynamic reloc against
|
|
// _GLOBAL_OFFSET_TABLE_.
|
|
if (!target->has_got_section()
|
|
&& strcmp(gsym->name(), "_GLOBAL_OFFSET_TABLE_") == 0)
|
|
target->got_section(symtab, layout);
|
|
|
|
r_type &= 0xff;
|
|
|
|
// A STT_GNU_IFUNC symbol may require a PLT entry.
|
|
if (is_ifunc
|
|
&& this->reloc_needs_plt_for_ifunc(object, r_type))
|
|
target->make_plt_entry(symtab, layout, gsym);
|
|
|
|
switch (r_type)
|
|
{
|
|
case elfcpp::R_SPARC_NONE:
|
|
case elfcpp::R_SPARC_REGISTER:
|
|
case elfcpp::R_SPARC_GNU_VTINHERIT:
|
|
case elfcpp::R_SPARC_GNU_VTENTRY:
|
|
break;
|
|
|
|
case elfcpp::R_SPARC_PLT64:
|
|
case elfcpp::R_SPARC_PLT32:
|
|
case elfcpp::R_SPARC_HIPLT22:
|
|
case elfcpp::R_SPARC_LOPLT10:
|
|
case elfcpp::R_SPARC_PCPLT32:
|
|
case elfcpp::R_SPARC_PCPLT22:
|
|
case elfcpp::R_SPARC_PCPLT10:
|
|
case elfcpp::R_SPARC_WPLT30:
|
|
// If the symbol is fully resolved, this is just a PC32 reloc.
|
|
// Otherwise we need a PLT entry.
|
|
if (gsym->final_value_is_known())
|
|
break;
|
|
// If building a shared library, we can also skip the PLT entry
|
|
// if the symbol is defined in the output file and is protected
|
|
// or hidden.
|
|
if (gsym->is_defined()
|
|
&& !gsym->is_from_dynobj()
|
|
&& !gsym->is_preemptible())
|
|
break;
|
|
target->make_plt_entry(symtab, layout, gsym);
|
|
break;
|
|
|
|
case elfcpp::R_SPARC_DISP8:
|
|
case elfcpp::R_SPARC_DISP16:
|
|
case elfcpp::R_SPARC_DISP32:
|
|
case elfcpp::R_SPARC_DISP64:
|
|
case elfcpp::R_SPARC_PC_HH22:
|
|
case elfcpp::R_SPARC_PC_HM10:
|
|
case elfcpp::R_SPARC_PC_LM22:
|
|
case elfcpp::R_SPARC_PC10:
|
|
case elfcpp::R_SPARC_PC22:
|
|
case elfcpp::R_SPARC_WDISP30:
|
|
case elfcpp::R_SPARC_WDISP22:
|
|
case elfcpp::R_SPARC_WDISP19:
|
|
case elfcpp::R_SPARC_WDISP16:
|
|
case elfcpp::R_SPARC_WDISP10:
|
|
{
|
|
if (gsym->needs_plt_entry())
|
|
target->make_plt_entry(symtab, layout, gsym);
|
|
// Make a dynamic relocation if necessary.
|
|
if (gsym->needs_dynamic_reloc(Scan::get_reference_flags(r_type)))
|
|
{
|
|
if (parameters->options().output_is_executable()
|
|
&& gsym->may_need_copy_reloc())
|
|
{
|
|
target->copy_reloc(symtab, layout, object,
|
|
data_shndx, output_section, gsym,
|
|
reloc);
|
|
}
|
|
else
|
|
{
|
|
Reloc_section* rela_dyn = target->rela_dyn_section(layout);
|
|
check_non_pic(object, r_type);
|
|
rela_dyn->add_global(gsym, orig_r_type, output_section, object,
|
|
data_shndx, reloc.get_r_offset(),
|
|
reloc.get_r_addend());
|
|
}
|
|
}
|
|
}
|
|
break;
|
|
|
|
case elfcpp::R_SPARC_UA64:
|
|
case elfcpp::R_SPARC_64:
|
|
case elfcpp::R_SPARC_HIX22:
|
|
case elfcpp::R_SPARC_LOX10:
|
|
case elfcpp::R_SPARC_H34:
|
|
case elfcpp::R_SPARC_H44:
|
|
case elfcpp::R_SPARC_M44:
|
|
case elfcpp::R_SPARC_L44:
|
|
case elfcpp::R_SPARC_HH22:
|
|
case elfcpp::R_SPARC_HM10:
|
|
case elfcpp::R_SPARC_LM22:
|
|
case elfcpp::R_SPARC_HI22:
|
|
case elfcpp::R_SPARC_LO10:
|
|
case elfcpp::R_SPARC_OLO10:
|
|
case elfcpp::R_SPARC_UA32:
|
|
case elfcpp::R_SPARC_32:
|
|
case elfcpp::R_SPARC_UA16:
|
|
case elfcpp::R_SPARC_16:
|
|
case elfcpp::R_SPARC_11:
|
|
case elfcpp::R_SPARC_10:
|
|
case elfcpp::R_SPARC_8:
|
|
case elfcpp::R_SPARC_7:
|
|
case elfcpp::R_SPARC_6:
|
|
case elfcpp::R_SPARC_5:
|
|
{
|
|
// Make a PLT entry if necessary.
|
|
if (gsym->needs_plt_entry())
|
|
{
|
|
target->make_plt_entry(symtab, layout, gsym);
|
|
// Since this is not a PC-relative relocation, we may be
|
|
// taking the address of a function. In that case we need to
|
|
// set the entry in the dynamic symbol table to the address of
|
|
// the PLT entry.
|
|
if (gsym->is_from_dynobj() && !parameters->options().shared())
|
|
gsym->set_needs_dynsym_value();
|
|
}
|
|
// Make a dynamic relocation if necessary.
|
|
if (gsym->needs_dynamic_reloc(Scan::get_reference_flags(r_type)))
|
|
{
|
|
unsigned int r_off = reloc.get_r_offset();
|
|
|
|
// The assembler can sometimes emit unaligned relocations
|
|
// for dwarf2 cfi directives.
|
|
switch (r_type)
|
|
{
|
|
case elfcpp::R_SPARC_16:
|
|
if (r_off & 0x1)
|
|
orig_r_type = r_type = elfcpp::R_SPARC_UA16;
|
|
break;
|
|
case elfcpp::R_SPARC_32:
|
|
if (r_off & 0x3)
|
|
orig_r_type = r_type = elfcpp::R_SPARC_UA32;
|
|
break;
|
|
case elfcpp::R_SPARC_64:
|
|
if (r_off & 0x7)
|
|
orig_r_type = r_type = elfcpp::R_SPARC_UA64;
|
|
break;
|
|
case elfcpp::R_SPARC_UA16:
|
|
if (!(r_off & 0x1))
|
|
orig_r_type = r_type = elfcpp::R_SPARC_16;
|
|
break;
|
|
case elfcpp::R_SPARC_UA32:
|
|
if (!(r_off & 0x3))
|
|
orig_r_type = r_type = elfcpp::R_SPARC_32;
|
|
break;
|
|
case elfcpp::R_SPARC_UA64:
|
|
if (!(r_off & 0x7))
|
|
orig_r_type = r_type = elfcpp::R_SPARC_64;
|
|
break;
|
|
}
|
|
|
|
if (!parameters->options().output_is_position_independent()
|
|
&& gsym->may_need_copy_reloc())
|
|
{
|
|
target->copy_reloc(symtab, layout, object,
|
|
data_shndx, output_section, gsym, reloc);
|
|
}
|
|
else if (((size == 64 && r_type == elfcpp::R_SPARC_64)
|
|
|| (size == 32 && r_type == elfcpp::R_SPARC_32))
|
|
&& gsym->type() == elfcpp::STT_GNU_IFUNC
|
|
&& gsym->can_use_relative_reloc(false)
|
|
&& !gsym->is_from_dynobj()
|
|
&& !gsym->is_undefined()
|
|
&& !gsym->is_preemptible())
|
|
{
|
|
// Use an IRELATIVE reloc for a locally defined
|
|
// STT_GNU_IFUNC symbol. This makes a function
|
|
// address in a PIE executable match the address in a
|
|
// shared library that it links against.
|
|
Reloc_section* rela_dyn =
|
|
target->rela_ifunc_section(layout);
|
|
unsigned int r_type = elfcpp::R_SPARC_IRELATIVE;
|
|
rela_dyn->add_symbolless_global_addend(gsym, r_type,
|
|
output_section, object,
|
|
data_shndx,
|
|
reloc.get_r_offset(),
|
|
reloc.get_r_addend());
|
|
}
|
|
else if ((r_type == elfcpp::R_SPARC_32
|
|
|| r_type == elfcpp::R_SPARC_64)
|
|
&& gsym->can_use_relative_reloc(false))
|
|
{
|
|
Reloc_section* rela_dyn = target->rela_dyn_section(layout);
|
|
rela_dyn->add_global_relative(gsym, elfcpp::R_SPARC_RELATIVE,
|
|
output_section, object,
|
|
data_shndx, reloc.get_r_offset(),
|
|
reloc.get_r_addend(), is_ifunc);
|
|
}
|
|
else
|
|
{
|
|
Reloc_section* rela_dyn = target->rela_dyn_section(layout);
|
|
|
|
check_non_pic(object, r_type);
|
|
if (gsym->is_from_dynobj()
|
|
|| gsym->is_undefined()
|
|
|| gsym->is_preemptible())
|
|
rela_dyn->add_global(gsym, orig_r_type, output_section,
|
|
object, data_shndx,
|
|
reloc.get_r_offset(),
|
|
reloc.get_r_addend());
|
|
else
|
|
rela_dyn->add_symbolless_global_addend(gsym, orig_r_type,
|
|
output_section,
|
|
object, data_shndx,
|
|
reloc.get_r_offset(),
|
|
reloc.get_r_addend());
|
|
}
|
|
}
|
|
}
|
|
break;
|
|
|
|
case elfcpp::R_SPARC_GOTDATA_OP:
|
|
case elfcpp::R_SPARC_GOTDATA_OP_HIX22:
|
|
case elfcpp::R_SPARC_GOTDATA_OP_LOX10:
|
|
if (gsym->is_defined()
|
|
&& !gsym->is_from_dynobj()
|
|
&& !gsym->is_preemptible()
|
|
&& !is_ifunc)
|
|
{
|
|
// We will optimize this into a GOT relative relocation
|
|
// and code transform the GOT load into an addition.
|
|
break;
|
|
}
|
|
case elfcpp::R_SPARC_GOT10:
|
|
case elfcpp::R_SPARC_GOT13:
|
|
case elfcpp::R_SPARC_GOT22:
|
|
{
|
|
// The symbol requires a GOT entry.
|
|
Output_data_got<size, big_endian>* got;
|
|
|
|
got = target->got_section(symtab, layout);
|
|
if (gsym->final_value_is_known())
|
|
{
|
|
// For a STT_GNU_IFUNC symbol we want the PLT address.
|
|
if (gsym->type() == elfcpp::STT_GNU_IFUNC)
|
|
got->add_global_plt(gsym, GOT_TYPE_STANDARD);
|
|
else
|
|
got->add_global(gsym, GOT_TYPE_STANDARD);
|
|
}
|
|
else
|
|
{
|
|
// If this symbol is not fully resolved, we need to add a
|
|
// GOT entry with a dynamic relocation.
|
|
bool is_ifunc = gsym->type() == elfcpp::STT_GNU_IFUNC;
|
|
|
|
// Use a GLOB_DAT rather than a RELATIVE reloc if:
|
|
//
|
|
// 1) The symbol may be defined in some other module.
|
|
//
|
|
// 2) We are building a shared library and this is a
|
|
// protected symbol; using GLOB_DAT means that the dynamic
|
|
// linker can use the address of the PLT in the main
|
|
// executable when appropriate so that function address
|
|
// comparisons work.
|
|
//
|
|
// 3) This is a STT_GNU_IFUNC symbol in position dependent
|
|
// code, again so that function address comparisons work.
|
|
Reloc_section* rela_dyn = target->rela_dyn_section(layout);
|
|
if (gsym->is_from_dynobj()
|
|
|| gsym->is_undefined()
|
|
|| gsym->is_preemptible()
|
|
|| (gsym->visibility() == elfcpp::STV_PROTECTED
|
|
&& parameters->options().shared())
|
|
|| (gsym->type() == elfcpp::STT_GNU_IFUNC
|
|
&& parameters->options().output_is_position_independent()
|
|
&& !gsym->is_forced_local()))
|
|
{
|
|
unsigned int r_type = elfcpp::R_SPARC_GLOB_DAT;
|
|
|
|
// If this symbol is forced local, this relocation will
|
|
// not work properly. That's because ld.so on sparc
|
|
// (and 32-bit powerpc) expects st_value in the r_addend
|
|
// of relocations for STB_LOCAL symbols. Curiously the
|
|
// BFD linker does not promote global hidden symbols to be
|
|
// STB_LOCAL in the dynamic symbol table like Gold does.
|
|
gold_assert(!gsym->is_forced_local());
|
|
got->add_global_with_rel(gsym, GOT_TYPE_STANDARD, rela_dyn,
|
|
r_type);
|
|
}
|
|
else if (!gsym->has_got_offset(GOT_TYPE_STANDARD))
|
|
{
|
|
unsigned int off = got->add_constant(0);
|
|
|
|
gsym->set_got_offset(GOT_TYPE_STANDARD, off);
|
|
if (is_ifunc)
|
|
{
|
|
// Tell the dynamic linker to use the PLT address
|
|
// when resolving relocations.
|
|
if (gsym->is_from_dynobj()
|
|
&& !parameters->options().shared())
|
|
gsym->set_needs_dynsym_value();
|
|
}
|
|
rela_dyn->add_global_relative(gsym, elfcpp::R_SPARC_RELATIVE,
|
|
got, off, 0, is_ifunc);
|
|
}
|
|
}
|
|
}
|
|
break;
|
|
|
|
// These are initial tls relocs, which are expected when
|
|
// linking.
|
|
case elfcpp::R_SPARC_TLS_GD_HI22: // Global-dynamic
|
|
case elfcpp::R_SPARC_TLS_GD_LO10:
|
|
case elfcpp::R_SPARC_TLS_GD_ADD:
|
|
case elfcpp::R_SPARC_TLS_GD_CALL:
|
|
case elfcpp::R_SPARC_TLS_LDM_HI22: // Local-dynamic
|
|
case elfcpp::R_SPARC_TLS_LDM_LO10:
|
|
case elfcpp::R_SPARC_TLS_LDM_ADD:
|
|
case elfcpp::R_SPARC_TLS_LDM_CALL:
|
|
case elfcpp::R_SPARC_TLS_LDO_HIX22: // Alternate local-dynamic
|
|
case elfcpp::R_SPARC_TLS_LDO_LOX10:
|
|
case elfcpp::R_SPARC_TLS_LDO_ADD:
|
|
case elfcpp::R_SPARC_TLS_LE_HIX22:
|
|
case elfcpp::R_SPARC_TLS_LE_LOX10:
|
|
case elfcpp::R_SPARC_TLS_IE_HI22: // Initial-exec
|
|
case elfcpp::R_SPARC_TLS_IE_LO10:
|
|
case elfcpp::R_SPARC_TLS_IE_LD:
|
|
case elfcpp::R_SPARC_TLS_IE_LDX:
|
|
case elfcpp::R_SPARC_TLS_IE_ADD:
|
|
{
|
|
const bool is_final = gsym->final_value_is_known();
|
|
const tls::Tls_optimization optimized_type
|
|
= optimize_tls_reloc(is_final, r_type);
|
|
switch (r_type)
|
|
{
|
|
case elfcpp::R_SPARC_TLS_GD_HI22: // Global-dynamic
|
|
case elfcpp::R_SPARC_TLS_GD_LO10:
|
|
case elfcpp::R_SPARC_TLS_GD_ADD:
|
|
case elfcpp::R_SPARC_TLS_GD_CALL:
|
|
if (optimized_type == tls::TLSOPT_NONE)
|
|
{
|
|
// Create a pair of GOT entries for the module index and
|
|
// dtv-relative offset.
|
|
Output_data_got<size, big_endian>* got
|
|
= target->got_section(symtab, layout);
|
|
got->add_global_pair_with_rel(gsym, GOT_TYPE_TLS_PAIR,
|
|
target->rela_dyn_section(layout),
|
|
(size == 64
|
|
? elfcpp::R_SPARC_TLS_DTPMOD64
|
|
: elfcpp::R_SPARC_TLS_DTPMOD32),
|
|
(size == 64
|
|
? elfcpp::R_SPARC_TLS_DTPOFF64
|
|
: elfcpp::R_SPARC_TLS_DTPOFF32));
|
|
|
|
// Emit R_SPARC_WPLT30 against "__tls_get_addr"
|
|
if (r_type == elfcpp::R_SPARC_TLS_GD_CALL)
|
|
generate_tls_call(symtab, layout, target);
|
|
}
|
|
else if (optimized_type == tls::TLSOPT_TO_IE)
|
|
{
|
|
// Create a GOT entry for the tp-relative offset.
|
|
Output_data_got<size, big_endian>* got
|
|
= target->got_section(symtab, layout);
|
|
got->add_global_with_rel(gsym, GOT_TYPE_TLS_OFFSET,
|
|
target->rela_dyn_section(layout),
|
|
(size == 64 ?
|
|
elfcpp::R_SPARC_TLS_TPOFF64 :
|
|
elfcpp::R_SPARC_TLS_TPOFF32));
|
|
}
|
|
else if (optimized_type != tls::TLSOPT_TO_LE)
|
|
unsupported_reloc_global(object, r_type, gsym);
|
|
break;
|
|
|
|
case elfcpp::R_SPARC_TLS_LDM_HI22: // Local-dynamic
|
|
case elfcpp::R_SPARC_TLS_LDM_LO10:
|
|
case elfcpp::R_SPARC_TLS_LDM_ADD:
|
|
case elfcpp::R_SPARC_TLS_LDM_CALL:
|
|
if (optimized_type == tls::TLSOPT_NONE)
|
|
{
|
|
// Create a GOT entry for the module index.
|
|
target->got_mod_index_entry(symtab, layout, object);
|
|
|
|
if (r_type == elfcpp::R_SPARC_TLS_LDM_CALL)
|
|
generate_tls_call(symtab, layout, target);
|
|
}
|
|
else if (optimized_type != tls::TLSOPT_TO_LE)
|
|
unsupported_reloc_global(object, r_type, gsym);
|
|
break;
|
|
|
|
case elfcpp::R_SPARC_TLS_LDO_HIX22: // Alternate local-dynamic
|
|
case elfcpp::R_SPARC_TLS_LDO_LOX10:
|
|
case elfcpp::R_SPARC_TLS_LDO_ADD:
|
|
break;
|
|
|
|
case elfcpp::R_SPARC_TLS_LE_HIX22:
|
|
case elfcpp::R_SPARC_TLS_LE_LOX10:
|
|
layout->set_has_static_tls();
|
|
if (parameters->options().shared())
|
|
{
|
|
Reloc_section* rela_dyn = target->rela_dyn_section(layout);
|
|
rela_dyn->add_symbolless_global_addend(gsym, orig_r_type,
|
|
output_section, object,
|
|
data_shndx, reloc.get_r_offset(),
|
|
0);
|
|
}
|
|
break;
|
|
|
|
case elfcpp::R_SPARC_TLS_IE_HI22: // Initial-exec
|
|
case elfcpp::R_SPARC_TLS_IE_LO10:
|
|
case elfcpp::R_SPARC_TLS_IE_LD:
|
|
case elfcpp::R_SPARC_TLS_IE_LDX:
|
|
case elfcpp::R_SPARC_TLS_IE_ADD:
|
|
layout->set_has_static_tls();
|
|
if (optimized_type == tls::TLSOPT_NONE)
|
|
{
|
|
// Create a GOT entry for the tp-relative offset.
|
|
Output_data_got<size, big_endian>* got
|
|
= target->got_section(symtab, layout);
|
|
got->add_global_with_rel(gsym, GOT_TYPE_TLS_OFFSET,
|
|
target->rela_dyn_section(layout),
|
|
(size == 64
|
|
? elfcpp::R_SPARC_TLS_TPOFF64
|
|
: elfcpp::R_SPARC_TLS_TPOFF32));
|
|
}
|
|
else if (optimized_type != tls::TLSOPT_TO_LE)
|
|
unsupported_reloc_global(object, r_type, gsym);
|
|
break;
|
|
}
|
|
}
|
|
break;
|
|
|
|
// These are relocations which should only be seen by the
|
|
// dynamic linker, and should never be seen here.
|
|
case elfcpp::R_SPARC_COPY:
|
|
case elfcpp::R_SPARC_GLOB_DAT:
|
|
case elfcpp::R_SPARC_JMP_SLOT:
|
|
case elfcpp::R_SPARC_JMP_IREL:
|
|
case elfcpp::R_SPARC_RELATIVE:
|
|
case elfcpp::R_SPARC_IRELATIVE:
|
|
case elfcpp::R_SPARC_TLS_DTPMOD64:
|
|
case elfcpp::R_SPARC_TLS_DTPMOD32:
|
|
case elfcpp::R_SPARC_TLS_DTPOFF64:
|
|
case elfcpp::R_SPARC_TLS_DTPOFF32:
|
|
case elfcpp::R_SPARC_TLS_TPOFF64:
|
|
case elfcpp::R_SPARC_TLS_TPOFF32:
|
|
gold_error(_("%s: unexpected reloc %u in object file"),
|
|
object->name().c_str(), r_type);
|
|
break;
|
|
|
|
default:
|
|
unsupported_reloc_global(object, r_type, gsym);
|
|
break;
|
|
}
|
|
}
|
|
|
|
// Process relocations for gc.
|
|
|
|
template<int size, bool big_endian>
|
|
void
|
|
Target_sparc<size, big_endian>::gc_process_relocs(
|
|
Symbol_table* symtab,
|
|
Layout* layout,
|
|
Sized_relobj_file<size, big_endian>* object,
|
|
unsigned int data_shndx,
|
|
unsigned int,
|
|
const unsigned char* prelocs,
|
|
size_t reloc_count,
|
|
Output_section* output_section,
|
|
bool needs_special_offset_handling,
|
|
size_t local_symbol_count,
|
|
const unsigned char* plocal_symbols)
|
|
{
|
|
typedef Target_sparc<size, big_endian> Sparc;
|
|
typedef typename Target_sparc<size, big_endian>::Scan Scan;
|
|
|
|
gold::gc_process_relocs<size, big_endian, Sparc, elfcpp::SHT_RELA, Scan,
|
|
typename Target_sparc::Relocatable_size_for_reloc>(
|
|
symtab,
|
|
layout,
|
|
this,
|
|
object,
|
|
data_shndx,
|
|
prelocs,
|
|
reloc_count,
|
|
output_section,
|
|
needs_special_offset_handling,
|
|
local_symbol_count,
|
|
plocal_symbols);
|
|
}
|
|
|
|
// Scan relocations for a section.
|
|
|
|
template<int size, bool big_endian>
|
|
void
|
|
Target_sparc<size, big_endian>::scan_relocs(
|
|
Symbol_table* symtab,
|
|
Layout* layout,
|
|
Sized_relobj_file<size, big_endian>* object,
|
|
unsigned int data_shndx,
|
|
unsigned int sh_type,
|
|
const unsigned char* prelocs,
|
|
size_t reloc_count,
|
|
Output_section* output_section,
|
|
bool needs_special_offset_handling,
|
|
size_t local_symbol_count,
|
|
const unsigned char* plocal_symbols)
|
|
{
|
|
typedef Target_sparc<size, big_endian> Sparc;
|
|
typedef typename Target_sparc<size, big_endian>::Scan Scan;
|
|
|
|
if (sh_type == elfcpp::SHT_REL)
|
|
{
|
|
gold_error(_("%s: unsupported REL reloc section"),
|
|
object->name().c_str());
|
|
return;
|
|
}
|
|
|
|
gold::scan_relocs<size, big_endian, Sparc, elfcpp::SHT_RELA, Scan>(
|
|
symtab,
|
|
layout,
|
|
this,
|
|
object,
|
|
data_shndx,
|
|
prelocs,
|
|
reloc_count,
|
|
output_section,
|
|
needs_special_offset_handling,
|
|
local_symbol_count,
|
|
plocal_symbols);
|
|
}
|
|
|
|
// Finalize the sections.
|
|
|
|
template<int size, bool big_endian>
|
|
void
|
|
Target_sparc<size, big_endian>::do_finalize_sections(
|
|
Layout* layout,
|
|
const Input_objects*,
|
|
Symbol_table* symtab)
|
|
{
|
|
if (this->plt_)
|
|
this->plt_->emit_pending_ifunc_relocs();
|
|
|
|
// Fill in some more dynamic tags.
|
|
const Reloc_section* rel_plt = (this->plt_ == NULL
|
|
? NULL
|
|
: this->plt_->rel_plt());
|
|
layout->add_target_dynamic_tags(false, this->plt_, rel_plt,
|
|
this->rela_dyn_, true, true);
|
|
|
|
// Emit any relocs we saved in an attempt to avoid generating COPY
|
|
// relocs.
|
|
if (this->copy_relocs_.any_saved_relocs())
|
|
this->copy_relocs_.emit(this->rela_dyn_section(layout));
|
|
|
|
if (parameters->doing_static_link()
|
|
&& (this->plt_ == NULL || !this->plt_->has_ifunc_section()))
|
|
{
|
|
// If linking statically, make sure that the __rela_iplt symbols
|
|
// were defined if necessary, even if we didn't create a PLT.
|
|
static const Define_symbol_in_segment syms[] =
|
|
{
|
|
{
|
|
"__rela_iplt_start", // name
|
|
elfcpp::PT_LOAD, // segment_type
|
|
elfcpp::PF_W, // segment_flags_set
|
|
elfcpp::PF(0), // segment_flags_clear
|
|
0, // value
|
|
0, // size
|
|
elfcpp::STT_NOTYPE, // type
|
|
elfcpp::STB_GLOBAL, // binding
|
|
elfcpp::STV_HIDDEN, // visibility
|
|
0, // nonvis
|
|
Symbol::SEGMENT_START, // offset_from_base
|
|
true // only_if_ref
|
|
},
|
|
{
|
|
"__rela_iplt_end", // name
|
|
elfcpp::PT_LOAD, // segment_type
|
|
elfcpp::PF_W, // segment_flags_set
|
|
elfcpp::PF(0), // segment_flags_clear
|
|
0, // value
|
|
0, // size
|
|
elfcpp::STT_NOTYPE, // type
|
|
elfcpp::STB_GLOBAL, // binding
|
|
elfcpp::STV_HIDDEN, // visibility
|
|
0, // nonvis
|
|
Symbol::SEGMENT_START, // offset_from_base
|
|
true // only_if_ref
|
|
}
|
|
};
|
|
|
|
symtab->define_symbols(layout, 2, syms,
|
|
layout->script_options()->saw_sections_clause());
|
|
}
|
|
}
|
|
|
|
// Perform a relocation.
|
|
|
|
template<int size, bool big_endian>
|
|
inline bool
|
|
Target_sparc<size, big_endian>::Relocate::relocate(
|
|
const Relocate_info<size, big_endian>* relinfo,
|
|
Target_sparc* target,
|
|
Output_section*,
|
|
size_t relnum,
|
|
const elfcpp::Rela<size, big_endian>& rela,
|
|
unsigned int r_type,
|
|
const Sized_symbol<size>* gsym,
|
|
const Symbol_value<size>* psymval,
|
|
unsigned char* view,
|
|
typename elfcpp::Elf_types<size>::Elf_Addr address,
|
|
section_size_type view_size)
|
|
{
|
|
bool orig_is_ifunc = psymval->is_ifunc_symbol();
|
|
r_type &= 0xff;
|
|
|
|
if (this->ignore_gd_add_)
|
|
{
|
|
if (r_type != elfcpp::R_SPARC_TLS_GD_ADD)
|
|
gold_error_at_location(relinfo, relnum, rela.get_r_offset(),
|
|
_("missing expected TLS relocation"));
|
|
else
|
|
{
|
|
this->ignore_gd_add_ = false;
|
|
return false;
|
|
}
|
|
}
|
|
|
|
if (view == NULL)
|
|
return true;
|
|
|
|
if (this->reloc_adjust_addr_ == view)
|
|
view -= 4;
|
|
|
|
typedef Sparc_relocate_functions<size, big_endian> Reloc;
|
|
const Sized_relobj_file<size, big_endian>* object = relinfo->object;
|
|
|
|
// Pick the value to use for symbols defined in shared objects.
|
|
Symbol_value<size> symval;
|
|
if (gsym != NULL
|
|
&& gsym->use_plt_offset(Scan::get_reference_flags(r_type)))
|
|
{
|
|
elfcpp::Elf_Xword value;
|
|
|
|
value = target->plt_address_for_global(gsym);
|
|
|
|
symval.set_output_value(value);
|
|
|
|
psymval = &symval;
|
|
}
|
|
else if (gsym == NULL && orig_is_ifunc)
|
|
{
|
|
unsigned int r_sym = elfcpp::elf_r_sym<size>(rela.get_r_info());
|
|
if (object->local_has_plt_offset(r_sym))
|
|
{
|
|
symval.set_output_value(target->plt_address_for_local(object, r_sym));
|
|
psymval = &symval;
|
|
}
|
|
}
|
|
|
|
const elfcpp::Elf_Xword addend = rela.get_r_addend();
|
|
|
|
// Get the GOT offset if needed. Unlike i386 and x86_64, our GOT
|
|
// pointer points to the beginning, not the end, of the table.
|
|
// So we just use the plain offset.
|
|
unsigned int got_offset = 0;
|
|
bool gdop_valid = false;
|
|
switch (r_type)
|
|
{
|
|
case elfcpp::R_SPARC_GOTDATA_OP:
|
|
case elfcpp::R_SPARC_GOTDATA_OP_HIX22:
|
|
case elfcpp::R_SPARC_GOTDATA_OP_LOX10:
|
|
// If this is local, we did not create a GOT entry because we
|
|
// intend to transform this into a GOT relative relocation.
|
|
if (gsym == NULL
|
|
|| (gsym->is_defined()
|
|
&& !gsym->is_from_dynobj()
|
|
&& !gsym->is_preemptible()
|
|
&& !orig_is_ifunc))
|
|
{
|
|
got_offset = psymval->value(object, addend) - target->got_address();
|
|
gdop_valid = true;
|
|
break;
|
|
}
|
|
case elfcpp::R_SPARC_GOT10:
|
|
case elfcpp::R_SPARC_GOT13:
|
|
case elfcpp::R_SPARC_GOT22:
|
|
if (gsym != NULL)
|
|
{
|
|
gold_assert(gsym->has_got_offset(GOT_TYPE_STANDARD));
|
|
got_offset = gsym->got_offset(GOT_TYPE_STANDARD);
|
|
}
|
|
else
|
|
{
|
|
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));
|
|
got_offset = object->local_got_offset(r_sym, GOT_TYPE_STANDARD);
|
|
}
|
|
break;
|
|
|
|
default:
|
|
break;
|
|
}
|
|
|
|
switch (r_type)
|
|
{
|
|
case elfcpp::R_SPARC_NONE:
|
|
case elfcpp::R_SPARC_REGISTER:
|
|
case elfcpp::R_SPARC_GNU_VTINHERIT:
|
|
case elfcpp::R_SPARC_GNU_VTENTRY:
|
|
break;
|
|
|
|
case elfcpp::R_SPARC_8:
|
|
Relocate_functions<size, big_endian>::rela8(view, object,
|
|
psymval, addend);
|
|
break;
|
|
|
|
case elfcpp::R_SPARC_16:
|
|
if (rela.get_r_offset() & 0x1)
|
|
{
|
|
// The assembler can sometimes emit unaligned relocations
|
|
// for dwarf2 cfi directives.
|
|
Reloc::ua16(view, object, psymval, addend);
|
|
}
|
|
else
|
|
Relocate_functions<size, big_endian>::rela16(view, object,
|
|
psymval, addend);
|
|
break;
|
|
|
|
case elfcpp::R_SPARC_32:
|
|
if (!parameters->options().output_is_position_independent())
|
|
{
|
|
if (rela.get_r_offset() & 0x3)
|
|
{
|
|
// The assembler can sometimes emit unaligned relocations
|
|
// for dwarf2 cfi directives.
|
|
Reloc::ua32(view, object, psymval, addend);
|
|
}
|
|
else
|
|
Relocate_functions<size, big_endian>::rela32(view, object,
|
|
psymval, addend);
|
|
}
|
|
break;
|
|
|
|
case elfcpp::R_SPARC_DISP8:
|
|
Reloc::disp8(view, object, psymval, addend, address);
|
|
break;
|
|
|
|
case elfcpp::R_SPARC_DISP16:
|
|
Reloc::disp16(view, object, psymval, addend, address);
|
|
break;
|
|
|
|
case elfcpp::R_SPARC_DISP32:
|
|
Reloc::disp32(view, object, psymval, addend, address);
|
|
break;
|
|
|
|
case elfcpp::R_SPARC_DISP64:
|
|
Reloc::disp64(view, object, psymval, addend, address);
|
|
break;
|
|
|
|
case elfcpp::R_SPARC_WDISP30:
|
|
case elfcpp::R_SPARC_WPLT30:
|
|
Reloc::wdisp30(view, object, psymval, addend, address);
|
|
if (target->may_relax())
|
|
relax_call(target, view, rela, view_size);
|
|
break;
|
|
|
|
case elfcpp::R_SPARC_WDISP22:
|
|
Reloc::wdisp22(view, object, psymval, addend, address);
|
|
break;
|
|
|
|
case elfcpp::R_SPARC_WDISP19:
|
|
Reloc::wdisp19(view, object, psymval, addend, address);
|
|
break;
|
|
|
|
case elfcpp::R_SPARC_WDISP16:
|
|
Reloc::wdisp16(view, object, psymval, addend, address);
|
|
break;
|
|
|
|
case elfcpp::R_SPARC_WDISP10:
|
|
Reloc::wdisp10(view, object, psymval, addend, address);
|
|
break;
|
|
|
|
case elfcpp::R_SPARC_HI22:
|
|
Reloc::hi22(view, object, psymval, addend);
|
|
break;
|
|
|
|
case elfcpp::R_SPARC_22:
|
|
Reloc::rela32_22(view, object, psymval, addend);
|
|
break;
|
|
|
|
case elfcpp::R_SPARC_13:
|
|
Reloc::rela32_13(view, object, psymval, addend);
|
|
break;
|
|
|
|
case elfcpp::R_SPARC_LO10:
|
|
Reloc::lo10(view, object, psymval, addend);
|
|
break;
|
|
|
|
case elfcpp::R_SPARC_GOT10:
|
|
Reloc::lo10(view, got_offset, addend);
|
|
break;
|
|
|
|
case elfcpp::R_SPARC_GOTDATA_OP:
|
|
if (gdop_valid)
|
|
{
|
|
typedef typename elfcpp::Swap<32, true>::Valtype Insntype;
|
|
Insntype* wv = reinterpret_cast<Insntype*>(view);
|
|
Insntype val;
|
|
|
|
// {ld,ldx} [%rs1 + %rs2], %rd --> add %rs1, %rs2, %rd
|
|
val = elfcpp::Swap<32, true>::readval(wv);
|
|
val = 0x80000000 | (val & 0x3e07c01f);
|
|
elfcpp::Swap<32, true>::writeval(wv, val);
|
|
}
|
|
break;
|
|
|
|
case elfcpp::R_SPARC_GOTDATA_OP_LOX10:
|
|
if (gdop_valid)
|
|
{
|
|
Reloc::gdop_lox10(view, got_offset);
|
|
break;
|
|
}
|
|
/* Fall through. */
|
|
case elfcpp::R_SPARC_GOT13:
|
|
Reloc::rela32_13(view, got_offset, addend);
|
|
break;
|
|
|
|
case elfcpp::R_SPARC_GOTDATA_OP_HIX22:
|
|
if (gdop_valid)
|
|
{
|
|
Reloc::gdop_hix22(view, got_offset);
|
|
break;
|
|
}
|
|
/* Fall through. */
|
|
case elfcpp::R_SPARC_GOT22:
|
|
Reloc::hi22(view, got_offset, addend);
|
|
break;
|
|
|
|
case elfcpp::R_SPARC_PC10:
|
|
Reloc::pc10(view, object, psymval, addend, address);
|
|
break;
|
|
|
|
case elfcpp::R_SPARC_PC22:
|
|
Reloc::pc22(view, object, psymval, addend, address);
|
|
break;
|
|
|
|
case elfcpp::R_SPARC_TLS_DTPOFF32:
|
|
case elfcpp::R_SPARC_UA32:
|
|
Reloc::ua32(view, object, psymval, addend);
|
|
break;
|
|
|
|
case elfcpp::R_SPARC_PLT64:
|
|
Relocate_functions<size, big_endian>::rela64(view, object,
|
|
psymval, addend);
|
|
break;
|
|
|
|
case elfcpp::R_SPARC_PLT32:
|
|
Relocate_functions<size, big_endian>::rela32(view, object,
|
|
psymval, addend);
|
|
break;
|
|
|
|
case elfcpp::R_SPARC_HIPLT22:
|
|
Reloc::hi22(view, object, psymval, addend);
|
|
break;
|
|
|
|
case elfcpp::R_SPARC_LOPLT10:
|
|
Reloc::lo10(view, object, psymval, addend);
|
|
break;
|
|
|
|
case elfcpp::R_SPARC_PCPLT32:
|
|
Reloc::disp32(view, object, psymval, addend, address);
|
|
break;
|
|
|
|
case elfcpp::R_SPARC_PCPLT22:
|
|
Reloc::pcplt22(view, object, psymval, addend, address);
|
|
break;
|
|
|
|
case elfcpp::R_SPARC_PCPLT10:
|
|
Reloc::lo10(view, object, psymval, addend, address);
|
|
break;
|
|
|
|
case elfcpp::R_SPARC_64:
|
|
if (!parameters->options().output_is_position_independent())
|
|
{
|
|
if (rela.get_r_offset() & 0x7)
|
|
{
|
|
// The assembler can sometimes emit unaligned relocations
|
|
// for dwarf2 cfi directives.
|
|
Reloc::ua64(view, object, psymval, addend);
|
|
}
|
|
else
|
|
Relocate_functions<size, big_endian>::rela64(view, object,
|
|
psymval, addend);
|
|
}
|
|
break;
|
|
|
|
case elfcpp::R_SPARC_OLO10:
|
|
{
|
|
unsigned int addend2 = rela.get_r_info() & 0xffffffff;
|
|
addend2 = ((addend2 >> 8) ^ 0x800000) - 0x800000;
|
|
Reloc::olo10(view, object, psymval, addend, addend2);
|
|
}
|
|
break;
|
|
|
|
case elfcpp::R_SPARC_HH22:
|
|
Reloc::hh22(view, object, psymval, addend);
|
|
break;
|
|
|
|
case elfcpp::R_SPARC_PC_HH22:
|
|
Reloc::pc_hh22(view, object, psymval, addend, address);
|
|
break;
|
|
|
|
case elfcpp::R_SPARC_HM10:
|
|
Reloc::hm10(view, object, psymval, addend);
|
|
break;
|
|
|
|
case elfcpp::R_SPARC_PC_HM10:
|
|
Reloc::pc_hm10(view, object, psymval, addend, address);
|
|
break;
|
|
|
|
case elfcpp::R_SPARC_LM22:
|
|
Reloc::hi22(view, object, psymval, addend);
|
|
break;
|
|
|
|
case elfcpp::R_SPARC_PC_LM22:
|
|
Reloc::pcplt22(view, object, psymval, addend, address);
|
|
break;
|
|
|
|
case elfcpp::R_SPARC_11:
|
|
Reloc::rela32_11(view, object, psymval, addend);
|
|
break;
|
|
|
|
case elfcpp::R_SPARC_10:
|
|
Reloc::rela32_10(view, object, psymval, addend);
|
|
break;
|
|
|
|
case elfcpp::R_SPARC_7:
|
|
Reloc::rela32_7(view, object, psymval, addend);
|
|
break;
|
|
|
|
case elfcpp::R_SPARC_6:
|
|
Reloc::rela32_6(view, object, psymval, addend);
|
|
break;
|
|
|
|
case elfcpp::R_SPARC_5:
|
|
Reloc::rela32_5(view, object, psymval, addend);
|
|
break;
|
|
|
|
case elfcpp::R_SPARC_HIX22:
|
|
Reloc::hix22(view, object, psymval, addend);
|
|
break;
|
|
|
|
case elfcpp::R_SPARC_LOX10:
|
|
Reloc::lox10(view, object, psymval, addend);
|
|
break;
|
|
|
|
case elfcpp::R_SPARC_H34:
|
|
Reloc::h34(view, object, psymval, addend);
|
|
break;
|
|
|
|
case elfcpp::R_SPARC_H44:
|
|
Reloc::h44(view, object, psymval, addend);
|
|
break;
|
|
|
|
case elfcpp::R_SPARC_M44:
|
|
Reloc::m44(view, object, psymval, addend);
|
|
break;
|
|
|
|
case elfcpp::R_SPARC_L44:
|
|
Reloc::l44(view, object, psymval, addend);
|
|
break;
|
|
|
|
case elfcpp::R_SPARC_TLS_DTPOFF64:
|
|
case elfcpp::R_SPARC_UA64:
|
|
Reloc::ua64(view, object, psymval, addend);
|
|
break;
|
|
|
|
case elfcpp::R_SPARC_UA16:
|
|
Reloc::ua16(view, object, psymval, addend);
|
|
break;
|
|
|
|
case elfcpp::R_SPARC_TLS_GD_HI22:
|
|
case elfcpp::R_SPARC_TLS_GD_LO10:
|
|
case elfcpp::R_SPARC_TLS_GD_ADD:
|
|
case elfcpp::R_SPARC_TLS_GD_CALL:
|
|
case elfcpp::R_SPARC_TLS_LDM_HI22:
|
|
case elfcpp::R_SPARC_TLS_LDM_LO10:
|
|
case elfcpp::R_SPARC_TLS_LDM_ADD:
|
|
case elfcpp::R_SPARC_TLS_LDM_CALL:
|
|
case elfcpp::R_SPARC_TLS_LDO_HIX22:
|
|
case elfcpp::R_SPARC_TLS_LDO_LOX10:
|
|
case elfcpp::R_SPARC_TLS_LDO_ADD:
|
|
case elfcpp::R_SPARC_TLS_IE_HI22:
|
|
case elfcpp::R_SPARC_TLS_IE_LO10:
|
|
case elfcpp::R_SPARC_TLS_IE_LD:
|
|
case elfcpp::R_SPARC_TLS_IE_LDX:
|
|
case elfcpp::R_SPARC_TLS_IE_ADD:
|
|
case elfcpp::R_SPARC_TLS_LE_HIX22:
|
|
case elfcpp::R_SPARC_TLS_LE_LOX10:
|
|
this->relocate_tls(relinfo, target, relnum, rela,
|
|
r_type, gsym, psymval, view,
|
|
address, view_size);
|
|
break;
|
|
|
|
case elfcpp::R_SPARC_COPY:
|
|
case elfcpp::R_SPARC_GLOB_DAT:
|
|
case elfcpp::R_SPARC_JMP_SLOT:
|
|
case elfcpp::R_SPARC_JMP_IREL:
|
|
case elfcpp::R_SPARC_RELATIVE:
|
|
case elfcpp::R_SPARC_IRELATIVE:
|
|
// These are outstanding tls relocs, which are unexpected when
|
|
// linking.
|
|
case elfcpp::R_SPARC_TLS_DTPMOD64:
|
|
case elfcpp::R_SPARC_TLS_DTPMOD32:
|
|
case elfcpp::R_SPARC_TLS_TPOFF64:
|
|
case elfcpp::R_SPARC_TLS_TPOFF32:
|
|
gold_error_at_location(relinfo, relnum, rela.get_r_offset(),
|
|
_("unexpected reloc %u in object file"),
|
|
r_type);
|
|
break;
|
|
|
|
default:
|
|
gold_error_at_location(relinfo, relnum, rela.get_r_offset(),
|
|
_("unsupported reloc %u"),
|
|
r_type);
|
|
break;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
// Perform a TLS relocation.
|
|
|
|
template<int size, bool big_endian>
|
|
inline void
|
|
Target_sparc<size, big_endian>::Relocate::relocate_tls(
|
|
const Relocate_info<size, big_endian>* relinfo,
|
|
Target_sparc<size, big_endian>* target,
|
|
size_t relnum,
|
|
const elfcpp::Rela<size, big_endian>& rela,
|
|
unsigned int r_type,
|
|
const Sized_symbol<size>* gsym,
|
|
const Symbol_value<size>* psymval,
|
|
unsigned char* view,
|
|
typename elfcpp::Elf_types<size>::Elf_Addr address,
|
|
section_size_type)
|
|
{
|
|
Output_segment* tls_segment = relinfo->layout->tls_segment();
|
|
typedef Sparc_relocate_functions<size, big_endian> Reloc;
|
|
const Sized_relobj_file<size, big_endian>* object = relinfo->object;
|
|
typedef typename elfcpp::Swap<32, true>::Valtype Insntype;
|
|
|
|
const elfcpp::Elf_Xword addend = rela.get_r_addend();
|
|
typename elfcpp::Elf_types<size>::Elf_Addr value = psymval->value(object, 0);
|
|
|
|
const bool is_final =
|
|
(gsym == NULL
|
|
? !parameters->options().output_is_position_independent()
|
|
: gsym->final_value_is_known());
|
|
const tls::Tls_optimization optimized_type
|
|
= optimize_tls_reloc(is_final, r_type);
|
|
|
|
switch (r_type)
|
|
{
|
|
case elfcpp::R_SPARC_TLS_GD_HI22:
|
|
case elfcpp::R_SPARC_TLS_GD_LO10:
|
|
case elfcpp::R_SPARC_TLS_GD_ADD:
|
|
case elfcpp::R_SPARC_TLS_GD_CALL:
|
|
if (optimized_type == tls::TLSOPT_TO_LE)
|
|
{
|
|
Insntype* wv = reinterpret_cast<Insntype*>(view);
|
|
Insntype val;
|
|
|
|
value -= tls_segment->memsz();
|
|
|
|
switch (r_type)
|
|
{
|
|
case elfcpp::R_SPARC_TLS_GD_HI22:
|
|
// TLS_GD_HI22 --> TLS_LE_HIX22
|
|
Reloc::hix22(view, value, addend);
|
|
break;
|
|
|
|
case elfcpp::R_SPARC_TLS_GD_LO10:
|
|
// TLS_GD_LO10 --> TLS_LE_LOX10
|
|
Reloc::lox10(view, value, addend);
|
|
break;
|
|
|
|
case elfcpp::R_SPARC_TLS_GD_ADD:
|
|
// add %reg1, %reg2, %reg3 --> mov %g7, %reg2, %reg3
|
|
val = elfcpp::Swap<32, true>::readval(wv);
|
|
val = (val & ~0x7c000) | 0x1c000;
|
|
elfcpp::Swap<32, true>::writeval(wv, val);
|
|
break;
|
|
case elfcpp::R_SPARC_TLS_GD_CALL:
|
|
// call __tls_get_addr --> nop
|
|
elfcpp::Swap<32, true>::writeval(wv, sparc_nop);
|
|
break;
|
|
}
|
|
break;
|
|
}
|
|
else
|
|
{
|
|
unsigned int got_type = (optimized_type == tls::TLSOPT_TO_IE
|
|
? GOT_TYPE_TLS_OFFSET
|
|
: GOT_TYPE_TLS_PAIR);
|
|
if (gsym != NULL)
|
|
{
|
|
gold_assert(gsym->has_got_offset(got_type));
|
|
value = gsym->got_offset(got_type);
|
|
}
|
|
else
|
|
{
|
|
unsigned int r_sym = elfcpp::elf_r_sym<size>(rela.get_r_info());
|
|
gold_assert(object->local_has_got_offset(r_sym, got_type));
|
|
value = object->local_got_offset(r_sym, got_type);
|
|
}
|
|
if (optimized_type == tls::TLSOPT_TO_IE)
|
|
{
|
|
Insntype* wv = reinterpret_cast<Insntype*>(view);
|
|
Insntype val;
|
|
|
|
switch (r_type)
|
|
{
|
|
case elfcpp::R_SPARC_TLS_GD_HI22:
|
|
// TLS_GD_HI22 --> TLS_IE_HI22
|
|
Reloc::hi22(view, value, addend);
|
|
break;
|
|
|
|
case elfcpp::R_SPARC_TLS_GD_LO10:
|
|
// TLS_GD_LO10 --> TLS_IE_LO10
|
|
Reloc::lo10(view, value, addend);
|
|
break;
|
|
|
|
case elfcpp::R_SPARC_TLS_GD_ADD:
|
|
// add %reg1, %reg2, %reg3 --> ld [%reg1 + %reg2], %reg3
|
|
val = elfcpp::Swap<32, true>::readval(wv);
|
|
|
|
if (size == 64)
|
|
val |= 0xc0580000;
|
|
else
|
|
val |= 0xc0000000;
|
|
|
|
elfcpp::Swap<32, true>::writeval(wv, val);
|
|
break;
|
|
|
|
case elfcpp::R_SPARC_TLS_GD_CALL:
|
|
// The compiler can put the TLS_GD_ADD instruction
|
|
// into the delay slot of the call. If so, we need
|
|
// to transpose the two instructions so that the
|
|
// new sequence works properly.
|
|
//
|
|
// The test we use is if the instruction in the
|
|
// delay slot is an add with destination register
|
|
// equal to %o0
|
|
val = elfcpp::Swap<32, true>::readval(wv + 1);
|
|
if ((val & 0x81f80000) == 0x80000000
|
|
&& ((val >> 25) & 0x1f) == 0x8)
|
|
{
|
|
if (size == 64)
|
|
val |= 0xc0580000;
|
|
else
|
|
val |= 0xc0000000;
|
|
|
|
elfcpp::Swap<32, true>::writeval(wv, val);
|
|
|
|
wv += 1;
|
|
this->ignore_gd_add_ = true;
|
|
}
|
|
else
|
|
{
|
|
// Even if the delay slot isn't the TLS_GD_ADD
|
|
// instruction, we still have to handle the case
|
|
// where it sets up %o0 in some other way.
|
|
elfcpp::Swap<32, true>::writeval(wv, val);
|
|
wv += 1;
|
|
this->reloc_adjust_addr_ = view + 4;
|
|
}
|
|
// call __tls_get_addr --> add %g7, %o0, %o0
|
|
elfcpp::Swap<32, true>::writeval(wv, 0x9001c008);
|
|
break;
|
|
}
|
|
break;
|
|
}
|
|
else if (optimized_type == tls::TLSOPT_NONE)
|
|
{
|
|
switch (r_type)
|
|
{
|
|
case elfcpp::R_SPARC_TLS_GD_HI22:
|
|
Reloc::hi22(view, value, addend);
|
|
break;
|
|
case elfcpp::R_SPARC_TLS_GD_LO10:
|
|
Reloc::lo10(view, value, addend);
|
|
break;
|
|
case elfcpp::R_SPARC_TLS_GD_ADD:
|
|
break;
|
|
case elfcpp::R_SPARC_TLS_GD_CALL:
|
|
{
|
|
Symbol_value<size> symval;
|
|
elfcpp::Elf_Xword value;
|
|
Symbol* tsym;
|
|
|
|
tsym = target->tls_get_addr_sym_;
|
|
gold_assert(tsym);
|
|
value = (target->plt_section()->address() +
|
|
tsym->plt_offset());
|
|
symval.set_output_value(value);
|
|
Reloc::wdisp30(view, object, &symval, addend, address);
|
|
}
|
|
break;
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
gold_error_at_location(relinfo, relnum, rela.get_r_offset(),
|
|
_("unsupported reloc %u"),
|
|
r_type);
|
|
break;
|
|
|
|
case elfcpp::R_SPARC_TLS_LDM_HI22:
|
|
case elfcpp::R_SPARC_TLS_LDM_LO10:
|
|
case elfcpp::R_SPARC_TLS_LDM_ADD:
|
|
case elfcpp::R_SPARC_TLS_LDM_CALL:
|
|
if (optimized_type == tls::TLSOPT_TO_LE)
|
|
{
|
|
Insntype* wv = reinterpret_cast<Insntype*>(view);
|
|
|
|
switch (r_type)
|
|
{
|
|
case elfcpp::R_SPARC_TLS_LDM_HI22:
|
|
case elfcpp::R_SPARC_TLS_LDM_LO10:
|
|
case elfcpp::R_SPARC_TLS_LDM_ADD:
|
|
elfcpp::Swap<32, true>::writeval(wv, sparc_nop);
|
|
break;
|
|
|
|
case elfcpp::R_SPARC_TLS_LDM_CALL:
|
|
elfcpp::Swap<32, true>::writeval(wv, sparc_mov_g0_o0);
|
|
break;
|
|
}
|
|
break;
|
|
}
|
|
else if (optimized_type == tls::TLSOPT_NONE)
|
|
{
|
|
// Relocate the field with the offset of the GOT entry for
|
|
// the module index.
|
|
unsigned int got_offset;
|
|
|
|
got_offset = target->got_mod_index_entry(NULL, NULL, NULL);
|
|
switch (r_type)
|
|
{
|
|
case elfcpp::R_SPARC_TLS_LDM_HI22:
|
|
Reloc::hi22(view, got_offset, addend);
|
|
break;
|
|
case elfcpp::R_SPARC_TLS_LDM_LO10:
|
|
Reloc::lo10(view, got_offset, addend);
|
|
break;
|
|
case elfcpp::R_SPARC_TLS_LDM_ADD:
|
|
break;
|
|
case elfcpp::R_SPARC_TLS_LDM_CALL:
|
|
{
|
|
Symbol_value<size> symval;
|
|
elfcpp::Elf_Xword value;
|
|
Symbol* tsym;
|
|
|
|
tsym = target->tls_get_addr_sym_;
|
|
gold_assert(tsym);
|
|
value = (target->plt_section()->address() +
|
|
tsym->plt_offset());
|
|
symval.set_output_value(value);
|
|
Reloc::wdisp30(view, object, &symval, addend, address);
|
|
}
|
|
break;
|
|
}
|
|
break;
|
|
}
|
|
gold_error_at_location(relinfo, relnum, rela.get_r_offset(),
|
|
_("unsupported reloc %u"),
|
|
r_type);
|
|
break;
|
|
|
|
// These relocs can appear in debugging sections, in which case
|
|
// we won't see the TLS_LDM relocs. The local_dynamic_type
|
|
// field tells us this.
|
|
case elfcpp::R_SPARC_TLS_LDO_HIX22:
|
|
if (optimized_type == tls::TLSOPT_TO_LE)
|
|
{
|
|
value -= tls_segment->memsz();
|
|
Reloc::hix22(view, value, addend);
|
|
}
|
|
else
|
|
Reloc::ldo_hix22(view, value, addend);
|
|
break;
|
|
case elfcpp::R_SPARC_TLS_LDO_LOX10:
|
|
if (optimized_type == tls::TLSOPT_TO_LE)
|
|
{
|
|
value -= tls_segment->memsz();
|
|
Reloc::lox10(view, value, addend);
|
|
}
|
|
else
|
|
Reloc::ldo_lox10(view, value, addend);
|
|
break;
|
|
case elfcpp::R_SPARC_TLS_LDO_ADD:
|
|
if (optimized_type == tls::TLSOPT_TO_LE)
|
|
{
|
|
Insntype* wv = reinterpret_cast<Insntype*>(view);
|
|
Insntype val;
|
|
|
|
// add %reg1, %reg2, %reg3 --> add %g7, %reg2, %reg3
|
|
val = elfcpp::Swap<32, true>::readval(wv);
|
|
val = (val & ~0x7c000) | 0x1c000;
|
|
elfcpp::Swap<32, true>::writeval(wv, val);
|
|
}
|
|
break;
|
|
|
|
// When optimizing IE --> LE, the only relocation that is handled
|
|
// differently is R_SPARC_TLS_IE_LD, it is rewritten from
|
|
// 'ld{,x} [rs1 + rs2], rd' into 'mov rs2, rd' or simply a NOP is
|
|
// rs2 and rd are the same.
|
|
case elfcpp::R_SPARC_TLS_IE_LD:
|
|
case elfcpp::R_SPARC_TLS_IE_LDX:
|
|
if (optimized_type == tls::TLSOPT_TO_LE)
|
|
{
|
|
Insntype* wv = reinterpret_cast<Insntype*>(view);
|
|
Insntype val = elfcpp::Swap<32, true>::readval(wv);
|
|
Insntype rs2 = val & 0x1f;
|
|
Insntype rd = (val >> 25) & 0x1f;
|
|
|
|
if (rs2 == rd)
|
|
val = sparc_nop;
|
|
else
|
|
val = sparc_mov | (val & 0x3e00001f);
|
|
|
|
elfcpp::Swap<32, true>::writeval(wv, val);
|
|
}
|
|
break;
|
|
|
|
case elfcpp::R_SPARC_TLS_IE_HI22:
|
|
case elfcpp::R_SPARC_TLS_IE_LO10:
|
|
if (optimized_type == tls::TLSOPT_TO_LE)
|
|
{
|
|
value -= tls_segment->memsz();
|
|
switch (r_type)
|
|
{
|
|
case elfcpp::R_SPARC_TLS_IE_HI22:
|
|
// IE_HI22 --> LE_HIX22
|
|
Reloc::hix22(view, value, addend);
|
|
break;
|
|
case elfcpp::R_SPARC_TLS_IE_LO10:
|
|
// IE_LO10 --> LE_LOX10
|
|
Reloc::lox10(view, value, addend);
|
|
break;
|
|
}
|
|
break;
|
|
}
|
|
else if (optimized_type == tls::TLSOPT_NONE)
|
|
{
|
|
// Relocate the field with the offset of the GOT entry for
|
|
// the tp-relative offset of the symbol.
|
|
if (gsym != NULL)
|
|
{
|
|
gold_assert(gsym->has_got_offset(GOT_TYPE_TLS_OFFSET));
|
|
value = gsym->got_offset(GOT_TYPE_TLS_OFFSET);
|
|
}
|
|
else
|
|
{
|
|
unsigned int r_sym = elfcpp::elf_r_sym<size>(rela.get_r_info());
|
|
gold_assert(object->local_has_got_offset(r_sym,
|
|
GOT_TYPE_TLS_OFFSET));
|
|
value = object->local_got_offset(r_sym,
|
|
GOT_TYPE_TLS_OFFSET);
|
|
}
|
|
switch (r_type)
|
|
{
|
|
case elfcpp::R_SPARC_TLS_IE_HI22:
|
|
Reloc::hi22(view, value, addend);
|
|
break;
|
|
case elfcpp::R_SPARC_TLS_IE_LO10:
|
|
Reloc::lo10(view, value, addend);
|
|
break;
|
|
}
|
|
break;
|
|
}
|
|
gold_error_at_location(relinfo, relnum, rela.get_r_offset(),
|
|
_("unsupported reloc %u"),
|
|
r_type);
|
|
break;
|
|
|
|
case elfcpp::R_SPARC_TLS_IE_ADD:
|
|
// This seems to be mainly so that we can find the addition
|
|
// instruction if there is one. There doesn't seem to be any
|
|
// actual relocation to apply.
|
|
break;
|
|
|
|
case elfcpp::R_SPARC_TLS_LE_HIX22:
|
|
// If we're creating a shared library, a dynamic relocation will
|
|
// have been created for this location, so do not apply it now.
|
|
if (!parameters->options().shared())
|
|
{
|
|
value -= tls_segment->memsz();
|
|
Reloc::hix22(view, value, addend);
|
|
}
|
|
break;
|
|
|
|
case elfcpp::R_SPARC_TLS_LE_LOX10:
|
|
// If we're creating a shared library, a dynamic relocation will
|
|
// have been created for this location, so do not apply it now.
|
|
if (!parameters->options().shared())
|
|
{
|
|
value -= tls_segment->memsz();
|
|
Reloc::lox10(view, value, addend);
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
|
|
// Relax a call instruction.
|
|
|
|
template<int size, bool big_endian>
|
|
inline void
|
|
Target_sparc<size, big_endian>::Relocate::relax_call(
|
|
Target_sparc<size, big_endian>* target,
|
|
unsigned char* view,
|
|
const elfcpp::Rela<size, big_endian>& rela,
|
|
section_size_type view_size)
|
|
{
|
|
typedef typename elfcpp::Swap<32, true>::Valtype Insntype;
|
|
Insntype *wv = reinterpret_cast<Insntype*>(view);
|
|
Insntype call_insn, delay_insn, set_insn;
|
|
uint32_t op3, reg, off;
|
|
|
|
// This code tries to relax call instructions that meet
|
|
// certain criteria.
|
|
//
|
|
// The first criteria is that the call must be such that the return
|
|
// address which the call writes into %o7 is unused. Two sequences
|
|
// meet this criteria, and are used to implement tail calls.
|
|
//
|
|
// Leaf function tail call:
|
|
//
|
|
// or %o7, %g0, %ANY_REG
|
|
// call FUNC
|
|
// or %ANY_REG, %g0, %o7
|
|
//
|
|
// Non-leaf function tail call:
|
|
//
|
|
// call FUNC
|
|
// restore
|
|
//
|
|
// The second criteria is that the call destination is close. If
|
|
// the displacement can fit in a signed 22-bit immediate field of a
|
|
// pre-V9 branch, we can do it. If we are generating a 64-bit
|
|
// object or a 32-bit object with ELF machine type EF_SPARC32PLUS,
|
|
// and the displacement fits in a signed 19-bit immediate field,
|
|
// then we can use a V9 branch.
|
|
|
|
// Make sure the delay instruction can be safely accessed.
|
|
if (rela.get_r_offset() + 8 > view_size)
|
|
return;
|
|
|
|
call_insn = elfcpp::Swap<32, true>::readval(wv);
|
|
delay_insn = elfcpp::Swap<32, true>::readval(wv + 1);
|
|
|
|
// Make sure it is really a call instruction.
|
|
if (((call_insn >> 30) & 0x3) != 1)
|
|
return;
|
|
|
|
if (((delay_insn >> 30) & 0x3) != 2)
|
|
return;
|
|
|
|
// Accept only a restore or an integer arithmetic operation whose
|
|
// sole side effect is to write the %o7 register (and perhaps set
|
|
// the condition codes, which are considered clobbered across
|
|
// function calls).
|
|
//
|
|
// For example, we don't want to match a tagged addition or
|
|
// subtraction. We also don't want to match something like a
|
|
// divide.
|
|
//
|
|
// Specifically we accept add{,cc}, and{,cc}, or{,cc},
|
|
// xor{,cc}, sub{,cc}, andn{,cc}, orn{,cc}, and xnor{,cc}.
|
|
|
|
op3 = (delay_insn >> 19) & 0x3f;
|
|
reg = (delay_insn >> 25) & 0x1f;
|
|
if (op3 != 0x3d
|
|
&& ((op3 & 0x28) != 0 || reg != 15))
|
|
return;
|
|
|
|
// For non-restore instructions, make sure %o7 isn't
|
|
// an input.
|
|
if (op3 != 0x3d)
|
|
{
|
|
// First check RS1
|
|
reg = (delay_insn >> 14) & 0x15;
|
|
if (reg == 15)
|
|
return;
|
|
|
|
// And if non-immediate, check RS2
|
|
if (((delay_insn >> 13) & 1) == 0)
|
|
{
|
|
reg = (delay_insn & 0x1f);
|
|
if (reg == 15)
|
|
return;
|
|
}
|
|
}
|
|
|
|
// Now check the branch distance. We are called after the
|
|
// call has been relocated, so we just have to peek at the
|
|
// offset contained in the instruction.
|
|
off = call_insn & 0x3fffffff;
|
|
if ((off & 0x3fe00000) != 0
|
|
&& (off & 0x3fe00000) != 0x3fe00000)
|
|
return;
|
|
|
|
if ((size == 64 || target->elf_machine_ == elfcpp::EM_SPARC32PLUS)
|
|
&& ((off & 0x3c0000) == 0
|
|
|| (off & 0x3c0000) == 0x3c0000))
|
|
{
|
|
// ba,pt %xcc, FUNC
|
|
call_insn = 0x10680000 | (off & 0x07ffff);
|
|
}
|
|
else
|
|
{
|
|
// ba FUNC
|
|
call_insn = 0x10800000 | (off & 0x3fffff);
|
|
}
|
|
elfcpp::Swap<32, true>::writeval(wv, call_insn);
|
|
|
|
// See if we can NOP out the delay slot instruction. We peek
|
|
// at the instruction before the call to make sure we're dealing
|
|
// with exactly the:
|
|
//
|
|
// or %o7, %g0, %ANY_REG
|
|
// call
|
|
// or %ANY_REG, %g0, %o7
|
|
//
|
|
// case. Otherwise this might be a tricky piece of hand written
|
|
// assembler calculating %o7 in some non-trivial way, and therefore
|
|
// we can't be sure that NOP'ing out the delay slot is safe.
|
|
if (op3 == 0x02
|
|
&& rela.get_r_offset() >= 4)
|
|
{
|
|
if ((delay_insn & ~(0x1f << 14)) != 0x9e100000)
|
|
return;
|
|
|
|
set_insn = elfcpp::Swap<32, true>::readval(wv - 1);
|
|
if ((set_insn & ~(0x1f << 25)) != 0x8013c000)
|
|
return;
|
|
|
|
reg = (set_insn >> 25) & 0x1f;
|
|
if (reg == 0 || reg == 15)
|
|
return;
|
|
if (reg != ((delay_insn >> 14) & 0x1f))
|
|
return;
|
|
|
|
// All tests pass, nop it out.
|
|
elfcpp::Swap<32, true>::writeval(wv + 1, sparc_nop);
|
|
}
|
|
}
|
|
|
|
// Relocate section data.
|
|
|
|
template<int size, bool big_endian>
|
|
void
|
|
Target_sparc<size, big_endian>::relocate_section(
|
|
const Relocate_info<size, big_endian>* relinfo,
|
|
unsigned int sh_type,
|
|
const unsigned char* prelocs,
|
|
size_t reloc_count,
|
|
Output_section* output_section,
|
|
bool needs_special_offset_handling,
|
|
unsigned char* view,
|
|
typename elfcpp::Elf_types<size>::Elf_Addr address,
|
|
section_size_type view_size,
|
|
const Reloc_symbol_changes* reloc_symbol_changes)
|
|
{
|
|
typedef Target_sparc<size, big_endian> Sparc;
|
|
typedef typename Target_sparc<size, big_endian>::Relocate Sparc_relocate;
|
|
|
|
gold_assert(sh_type == elfcpp::SHT_RELA);
|
|
|
|
gold::relocate_section<size, big_endian, Sparc, elfcpp::SHT_RELA,
|
|
Sparc_relocate, gold::Default_comdat_behavior>(
|
|
relinfo,
|
|
this,
|
|
prelocs,
|
|
reloc_count,
|
|
output_section,
|
|
needs_special_offset_handling,
|
|
view,
|
|
address,
|
|
view_size,
|
|
reloc_symbol_changes);
|
|
}
|
|
|
|
// Return the size of a relocation while scanning during a relocatable
|
|
// link.
|
|
|
|
template<int size, bool big_endian>
|
|
unsigned int
|
|
Target_sparc<size, big_endian>::Relocatable_size_for_reloc::get_size_for_reloc(
|
|
unsigned int,
|
|
Relobj*)
|
|
{
|
|
// We are always SHT_RELA, so we should never get here.
|
|
gold_unreachable();
|
|
return 0;
|
|
}
|
|
|
|
// Scan the relocs during a relocatable link.
|
|
|
|
template<int size, bool big_endian>
|
|
void
|
|
Target_sparc<size, big_endian>::scan_relocatable_relocs(
|
|
Symbol_table* symtab,
|
|
Layout* layout,
|
|
Sized_relobj_file<size, big_endian>* object,
|
|
unsigned int data_shndx,
|
|
unsigned int sh_type,
|
|
const unsigned char* prelocs,
|
|
size_t reloc_count,
|
|
Output_section* output_section,
|
|
bool needs_special_offset_handling,
|
|
size_t local_symbol_count,
|
|
const unsigned char* plocal_symbols,
|
|
Relocatable_relocs* rr)
|
|
{
|
|
gold_assert(sh_type == elfcpp::SHT_RELA);
|
|
|
|
typedef gold::Default_scan_relocatable_relocs<elfcpp::SHT_RELA,
|
|
Relocatable_size_for_reloc> Scan_relocatable_relocs;
|
|
|
|
gold::scan_relocatable_relocs<size, big_endian, elfcpp::SHT_RELA,
|
|
Scan_relocatable_relocs>(
|
|
symtab,
|
|
layout,
|
|
object,
|
|
data_shndx,
|
|
prelocs,
|
|
reloc_count,
|
|
output_section,
|
|
needs_special_offset_handling,
|
|
local_symbol_count,
|
|
plocal_symbols,
|
|
rr);
|
|
}
|
|
|
|
// Emit relocations for a section.
|
|
|
|
template<int size, bool big_endian>
|
|
void
|
|
Target_sparc<size, big_endian>::relocate_relocs(
|
|
const Relocate_info<size, big_endian>* relinfo,
|
|
unsigned int sh_type,
|
|
const unsigned char* prelocs,
|
|
size_t reloc_count,
|
|
Output_section* output_section,
|
|
typename elfcpp::Elf_types<size>::Elf_Off offset_in_output_section,
|
|
const Relocatable_relocs* rr,
|
|
unsigned char* view,
|
|
typename elfcpp::Elf_types<size>::Elf_Addr view_address,
|
|
section_size_type view_size,
|
|
unsigned char* reloc_view,
|
|
section_size_type reloc_view_size)
|
|
{
|
|
gold_assert(sh_type == elfcpp::SHT_RELA);
|
|
|
|
gold::relocate_relocs<size, big_endian, elfcpp::SHT_RELA>(
|
|
relinfo,
|
|
prelocs,
|
|
reloc_count,
|
|
output_section,
|
|
offset_in_output_section,
|
|
rr,
|
|
view,
|
|
view_address,
|
|
view_size,
|
|
reloc_view,
|
|
reloc_view_size);
|
|
}
|
|
|
|
// Return the value to use for a dynamic which requires special
|
|
// treatment. This is how we support equality comparisons of function
|
|
// pointers across shared library boundaries, as described in the
|
|
// processor specific ABI supplement.
|
|
|
|
template<int size, bool big_endian>
|
|
uint64_t
|
|
Target_sparc<size, big_endian>::do_dynsym_value(const Symbol* gsym) const
|
|
{
|
|
gold_assert(gsym->is_from_dynobj() && gsym->has_plt_offset());
|
|
return this->plt_section()->address() + gsym->plt_offset();
|
|
}
|
|
|
|
// do_make_elf_object to override the same function in the base class.
|
|
// We need to use a target-specific sub-class of
|
|
// Sized_relobj_file<size, big_endian> to process SPARC specific bits
|
|
// of the ELF headers. Hence we need to have our own ELF object creation.
|
|
|
|
template<int size, bool big_endian>
|
|
Object*
|
|
Target_sparc<size, big_endian>::do_make_elf_object(
|
|
const std::string& name,
|
|
Input_file* input_file,
|
|
off_t offset, const elfcpp::Ehdr<size, big_endian>& ehdr)
|
|
{
|
|
elfcpp::Elf_Half machine = ehdr.get_e_machine();
|
|
elfcpp::Elf_Word flags = ehdr.get_e_flags();
|
|
elfcpp::Elf_Word omm, mm;
|
|
|
|
switch (machine)
|
|
{
|
|
case elfcpp::EM_SPARC32PLUS:
|
|
this->elf_machine_ = elfcpp::EM_SPARC32PLUS;
|
|
break;
|
|
|
|
case elfcpp::EM_SPARC:
|
|
case elfcpp::EM_SPARCV9:
|
|
break;
|
|
|
|
default:
|
|
break;
|
|
}
|
|
|
|
if (!this->elf_flags_set_)
|
|
{
|
|
this->elf_flags_ = flags;
|
|
this->elf_flags_set_ = true;
|
|
}
|
|
else
|
|
{
|
|
// Accumulate cpu feature bits.
|
|
this->elf_flags_ |= (flags & (elfcpp::EF_SPARC_32PLUS
|
|
| elfcpp::EF_SPARC_SUN_US1
|
|
| elfcpp::EF_SPARC_HAL_R1
|
|
| elfcpp::EF_SPARC_SUN_US3));
|
|
|
|
// Bump the memory model setting to the most restrictive
|
|
// one we encounter.
|
|
omm = (this->elf_flags_ & elfcpp::EF_SPARCV9_MM);
|
|
mm = (flags & elfcpp::EF_SPARCV9_MM);
|
|
if (omm != mm)
|
|
{
|
|
if (mm == elfcpp::EF_SPARCV9_TSO)
|
|
{
|
|
this->elf_flags_ &= ~elfcpp::EF_SPARCV9_MM;
|
|
this->elf_flags_ |= elfcpp::EF_SPARCV9_TSO;
|
|
}
|
|
else if (mm == elfcpp::EF_SPARCV9_PSO
|
|
&& omm == elfcpp::EF_SPARCV9_RMO)
|
|
{
|
|
this->elf_flags_ &= ~elfcpp::EF_SPARCV9_MM;
|
|
this->elf_flags_ |= elfcpp::EF_SPARCV9_PSO;
|
|
}
|
|
}
|
|
}
|
|
|
|
// Validate that the little-endian flag matches how we've
|
|
// been instantiated.
|
|
if (!(flags & elfcpp::EF_SPARC_LEDATA) != big_endian)
|
|
{
|
|
if (big_endian)
|
|
gold_error(_("%s: little endian elf flag set on BE object"),
|
|
name.c_str());
|
|
else
|
|
gold_error(_("%s: little endian elf flag clear on LE object"),
|
|
name.c_str());
|
|
}
|
|
|
|
return Target::do_make_elf_object(name, input_file, offset, ehdr);
|
|
}
|
|
|
|
// Adjust ELF file header.
|
|
|
|
template<int size, bool big_endian>
|
|
void
|
|
Target_sparc<size, big_endian>::do_adjust_elf_header(
|
|
unsigned char* view,
|
|
int len)
|
|
{
|
|
elfcpp::Ehdr_write<size, big_endian> oehdr(view);
|
|
|
|
oehdr.put_e_machine(this->elf_machine_);
|
|
oehdr.put_e_flags(this->elf_flags_);
|
|
|
|
Sized_target<size, big_endian>::do_adjust_elf_header(view, len);
|
|
}
|
|
|
|
// The selector for sparc object files.
|
|
|
|
template<int size, bool big_endian>
|
|
class Target_selector_sparc : public Target_selector
|
|
{
|
|
public:
|
|
Target_selector_sparc()
|
|
: Target_selector(elfcpp::EM_NONE, size, big_endian,
|
|
(size == 64 ? "elf64-sparc" : "elf32-sparc"),
|
|
(size == 64 ? "elf64_sparc" : "elf32_sparc"))
|
|
{ }
|
|
|
|
virtual Target*
|
|
do_recognize(Input_file*, off_t, int machine, int, int)
|
|
{
|
|
switch (size)
|
|
{
|
|
case 64:
|
|
if (machine != elfcpp::EM_SPARCV9)
|
|
return NULL;
|
|
break;
|
|
|
|
case 32:
|
|
if (machine != elfcpp::EM_SPARC
|
|
&& machine != elfcpp::EM_SPARC32PLUS)
|
|
return NULL;
|
|
break;
|
|
|
|
default:
|
|
return NULL;
|
|
}
|
|
|
|
return this->instantiate_target();
|
|
}
|
|
|
|
virtual Target*
|
|
do_instantiate_target()
|
|
{ return new Target_sparc<size, big_endian>(); }
|
|
};
|
|
|
|
Target_selector_sparc<32, true> target_selector_sparc32;
|
|
Target_selector_sparc<64, true> target_selector_sparc64;
|
|
|
|
} // End anonymous namespace.
|