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03ef7571fc
* target-select.cc (Target_selector::Target_selector): Add emulation parameter. Change all callers. (select_target_by_bfd_name): Rename from select_target_by_name. Change all callers. (select_target_by_emulation): New function. (supported_emulation_names): New function. * target-select.h (class Target_selector): Add emulation_ field. Update declarations. (Target_selector::recognize_by_bfd_name): Rename from recognize_by_name. Change all callers. (Target_selector::supported_bfd_names): Rename from supported_names. Change all callers. (Target_selector::recognize_by_emulation): New function. (Target_selector::supported_emulations): New function. (Target_selector::emulation): New function. (Target_selector::do_recognize_by_bfd_name): Rename from do_recognize_by_name. Change all callers. (Target_selector::do_supported_bfd_names): Rename from do_supported_names. Change all callers. (Target_selector::do_recognize_by_emulation): New function. (Target_selector::do_supported_emulations): New function. (select_target_by_bfd_name): Change name in declaration. (select_target_by_emulation): Declare. (supported_emulation_names): Declare. * parameters.cc (parameters_force_valid_target): Try to find target based on emulation from -m option. * options.h (class General_options): Change doc string for -m. * options.cc (help): Print emulations. (General_options::parse_V): Likewise. * freebsd.h (Target_selector_freebsd::Target_selector_freebsd): Add emulation parameter. Change all callers.
2166 lines
63 KiB
C++
2166 lines
63 KiB
C++
// powerpc.cc -- powerpc target support for gold.
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// Copyright 2008, 2009, 2010, 2011 Free Software Foundation, Inc.
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// Written by David S. Miller <davem@davemloft.net>
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// and David Edelsohn <edelsohn@gnu.org>
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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 "elfcpp.h"
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#include "parameters.h"
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#include "reloc.h"
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#include "powerpc.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_powerpc;
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template<int size, bool big_endian>
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class Target_powerpc : 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_powerpc()
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: Sized_target<size, big_endian>(&powerpc_info),
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got_(NULL), got2_(NULL), toc_(NULL),
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plt_(NULL), rela_dyn_(NULL),
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copy_relocs_(elfcpp::R_POWERPC_COPY),
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dynbss_(NULL), got_mod_index_offset_(-1U)
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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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// Relocate a section during a relocatable link.
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void
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relocate_for_relocatable(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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off_t 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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return strcmp(sym->name(), "___tls_get_addr") == 0;
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}
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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 number of entries in the PLT.
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unsigned int
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plt_entry_count() const;
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// Return the offset of the first non-reserved PLT entry.
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unsigned int
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first_plt_entry_offset() const;
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// Return the size of each PLT entry.
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unsigned int
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plt_entry_size() const;
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private:
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// The class which scans relocations.
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class Scan
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{
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public:
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Scan()
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: issued_non_pic_error_(false)
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{ }
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static inline int
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get_reference_flags(unsigned int r_type);
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inline void
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local(Symbol_table* symtab, Layout* layout, Target_powerpc* 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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inline void
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global(Symbol_table* symtab, Layout* layout, Target_powerpc* 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_powerpc* ,
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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_powerpc* ,
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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_powerpc* target);
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void
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check_non_pic(Relobj*, unsigned int r_type);
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// Whether we have issued an error about a non-PIC compilation.
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bool issued_non_pic_error_;
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};
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// The class which implements relocation.
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class Relocate
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{
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public:
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// 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_powerpc*,
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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>*,
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Target_powerpc* 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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};
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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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Output_data_space*
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got2_section() const
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{
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gold_assert(this->got2_ != NULL);
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return this->got2_;
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}
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// Get the TOC section.
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Output_data_space*
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toc_section() const
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{
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gold_assert(this->toc_ != NULL);
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return this->toc_;
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}
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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 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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// Get the PLT section.
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const Output_data_plt_powerpc<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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// 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 powerpc_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 GOT2 section.
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Output_data_space* got2_;
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// The TOC section.
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Output_data_space* toc_;
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// The PLT section.
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Output_data_plt_powerpc<size, big_endian>* plt_;
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// The dynamic reloc section.
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Reloc_section* rela_dyn_;
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// Relocs saved to avoid a COPY reloc.
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Copy_relocs<elfcpp::SHT_RELA, size, big_endian> copy_relocs_;
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// Space for variables copied with a COPY reloc.
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Output_data_space* dynbss_;
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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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};
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template<>
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Target::Target_info Target_powerpc<32, true>::powerpc_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_PPC, // 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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0x10000000, // default_text_segment_address
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64 * 1024, // abi_pagesize (overridable by -z max-page-size)
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4 * 1024, // common_pagesize (overridable by -z common-page-size)
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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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};
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template<>
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Target::Target_info Target_powerpc<32, false>::powerpc_info =
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{
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32, // size
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false, // is_big_endian
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elfcpp::EM_PPC, // 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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0x10000000, // default_text_segment_address
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64 * 1024, // abi_pagesize (overridable by -z max-page-size)
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4 * 1024, // common_pagesize (overridable by -z common-page-size)
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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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};
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template<>
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Target::Target_info Target_powerpc<64, true>::powerpc_info =
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{
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64, // size
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true, // is_big_endian
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elfcpp::EM_PPC64, // 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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0x10000000, // 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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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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};
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template<>
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Target::Target_info Target_powerpc<64, false>::powerpc_info =
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{
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64, // size
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false, // is_big_endian
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elfcpp::EM_PPC64, // 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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0x10000000, // 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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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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};
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template<int size, bool big_endian>
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class Powerpc_relocate_functions
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{
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private:
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// Do a simple relocation with the addend in the relocation.
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template<int valsize>
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static inline void
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rela(unsigned char* view,
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unsigned int right_shift,
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elfcpp::Elf_Xword 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,
|
|
elfcpp::Elf_Xword 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,
|
|
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,
|
|
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 Powerpc_relocate_functions<size, big_endian> This;
|
|
typedef Relocate_functions<size, big_endian> This_reloc;
|
|
public:
|
|
// R_POWERPC_REL32: (Symbol + Addend - Address)
|
|
static inline void
|
|
rel32(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_reloc::pcrela32(view, object, psymval, addend, address); }
|
|
|
|
// R_POWERPC_REL24: (Symbol + Addend - Address) & 0x3fffffc
|
|
static inline void
|
|
rel24(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<32>(view, 0, 0x03fffffc, object,
|
|
psymval, addend, address);
|
|
}
|
|
|
|
// R_POWERPC_REL14: (Symbol + Addend - Address) & 0xfffc
|
|
static inline void
|
|
rel14(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<32>(view, 0, 0x0000fffc, object,
|
|
psymval, addend, address);
|
|
}
|
|
|
|
// R_POWERPC_ADDR16: (Symbol + Addend) & 0xffff
|
|
static inline void
|
|
addr16(unsigned char* view,
|
|
typename elfcpp::Elf_types<size>::Elf_Addr value,
|
|
typename elfcpp::Elf_types<size>::Elf_Addr addend)
|
|
{ This_reloc::rela16(view, value, addend); }
|
|
|
|
static inline void
|
|
addr16(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_reloc::rela16(view, object, psymval, addend); }
|
|
|
|
// R_POWERPC_ADDR16_DS: (Symbol + Addend) & 0xfffc
|
|
static inline void
|
|
addr16_ds(unsigned char* view,
|
|
typename elfcpp::Elf_types<size>::Elf_Addr value,
|
|
typename elfcpp::Elf_types<size>::Elf_Addr addend)
|
|
{
|
|
This::template rela<16>(view, 0, 0xfffc, value, addend);
|
|
}
|
|
|
|
// R_POWERPC_ADDR16_LO: (Symbol + Addend) & 0xffff
|
|
static inline void
|
|
addr16_lo(unsigned char* view,
|
|
typename elfcpp::Elf_types<size>::Elf_Addr value,
|
|
typename elfcpp::Elf_types<size>::Elf_Addr addend)
|
|
{ This_reloc::rela16(view, value, addend); }
|
|
|
|
static inline void
|
|
addr16_lo(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_reloc::rela16(view, object, psymval, addend); }
|
|
|
|
// R_POWERPC_ADDR16_HI: ((Symbol + Addend) >> 16) & 0xffff
|
|
static inline void
|
|
addr16_hi(unsigned char* view,
|
|
typename elfcpp::Elf_types<size>::Elf_Addr value,
|
|
typename elfcpp::Elf_types<size>::Elf_Addr addend)
|
|
{
|
|
This::template rela<16>(view, 16, 0xffff, value, addend);
|
|
}
|
|
|
|
static inline void
|
|
addr16_hi(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<16>(view, 16, 0xffff, object, psymval, addend);
|
|
}
|
|
|
|
// R_POWERPC_ADDR16_HA: Same as R_POWERPC_ADDR16_HI except that if the
|
|
// final value of the low 16 bits of the
|
|
// relocation is negative, add one.
|
|
static inline void
|
|
addr16_ha(unsigned char* view,
|
|
typename elfcpp::Elf_types<size>::Elf_Addr value,
|
|
typename elfcpp::Elf_types<size>::Elf_Addr addend)
|
|
{
|
|
typename elfcpp::Elf_types<size>::Elf_Addr reloc;
|
|
|
|
reloc = value + addend;
|
|
|
|
if (reloc & 0x8000)
|
|
reloc += 0x10000;
|
|
reloc >>= 16;
|
|
|
|
elfcpp::Swap<16, big_endian>::writeval(view, reloc);
|
|
}
|
|
|
|
static inline void
|
|
addr16_ha(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 reloc;
|
|
|
|
reloc = psymval->value(object, addend);
|
|
|
|
if (reloc & 0x8000)
|
|
reloc += 0x10000;
|
|
reloc >>= 16;
|
|
|
|
elfcpp::Swap<16, big_endian>::writeval(view, reloc);
|
|
}
|
|
|
|
// R_PPC_REL16: (Symbol + Addend - Address) & 0xffff
|
|
static inline void
|
|
rel16(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_reloc::pcrela16(view, object, psymval, addend, address); }
|
|
|
|
// R_PPC_REL16_LO: (Symbol + Addend - Address) & 0xffff
|
|
static inline void
|
|
rel16_lo(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_reloc::pcrela16(view, object, psymval, addend, address); }
|
|
|
|
// R_PPC_REL16_HI: ((Symbol + Addend - Address) >> 16) & 0xffff
|
|
static inline void
|
|
rel16_hi(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<16>(view, 16, 0xffff, object,
|
|
psymval, addend, address);
|
|
}
|
|
|
|
// R_PPC_REL16_HA: Same as R_PPC_REL16_HI except that if the
|
|
// final value of the low 16 bits of the
|
|
// relocation is negative, add one.
|
|
static inline void
|
|
rel16_ha(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)
|
|
{
|
|
typename elfcpp::Elf_types<size>::Elf_Addr reloc;
|
|
|
|
reloc = (psymval->value(object, addend) - address);
|
|
if (reloc & 0x8000)
|
|
reloc += 0x10000;
|
|
reloc >>= 16;
|
|
|
|
elfcpp::Swap<16, big_endian>::writeval(view, reloc);
|
|
}
|
|
};
|
|
|
|
// Get the GOT section, creating it if necessary.
|
|
|
|
template<int size, bool big_endian>
|
|
Output_data_got<size, big_endian>*
|
|
Target_powerpc<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_DATA, false);
|
|
|
|
// Create the GOT2 or TOC in the .got section.
|
|
if (size == 32)
|
|
{
|
|
this->got2_ = new Output_data_space(4, "** GOT2");
|
|
layout->add_output_section_data(".got2", elfcpp::SHT_PROGBITS,
|
|
elfcpp::SHF_ALLOC
|
|
| elfcpp::SHF_WRITE,
|
|
this->got2_, ORDER_DATA, false);
|
|
}
|
|
else
|
|
{
|
|
this->toc_ = new Output_data_space(8, "** TOC");
|
|
layout->add_output_section_data(".toc", elfcpp::SHT_PROGBITS,
|
|
elfcpp::SHF_ALLOC
|
|
| elfcpp::SHF_WRITE,
|
|
this->toc_, ORDER_DATA, false);
|
|
}
|
|
|
|
// 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_powerpc<size, big_endian>::Reloc_section*
|
|
Target_powerpc<size, big_endian>::rela_dyn_section(Layout* layout)
|
|
{
|
|
if (this->rela_dyn_ == NULL)
|
|
{
|
|
gold_assert(layout != NULL);
|
|
this->rela_dyn_ = new Reloc_section(parameters->options().combreloc());
|
|
layout->add_output_section_data(".rela.dyn", elfcpp::SHT_RELA,
|
|
elfcpp::SHF_ALLOC, this->rela_dyn_,
|
|
ORDER_DYNAMIC_RELOCS, false);
|
|
}
|
|
return this->rela_dyn_;
|
|
}
|
|
|
|
// A class to handle the PLT data.
|
|
|
|
template<int size, bool big_endian>
|
|
class Output_data_plt_powerpc : public Output_section_data
|
|
{
|
|
public:
|
|
typedef Output_data_reloc<elfcpp::SHT_RELA, true,
|
|
size, big_endian> Reloc_section;
|
|
|
|
Output_data_plt_powerpc(Layout*);
|
|
|
|
// Add an entry to the PLT.
|
|
void add_entry(Symbol* gsym);
|
|
|
|
// Return the .rela.plt section data.
|
|
const Reloc_section* rel_plt() const
|
|
{
|
|
return this->rel_;
|
|
}
|
|
|
|
// Return the number of PLT entries.
|
|
unsigned int
|
|
entry_count() const
|
|
{ return this->count_; }
|
|
|
|
// Return the offset of the first non-reserved PLT entry.
|
|
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; }
|
|
|
|
protected:
|
|
void do_adjust_output_section(Output_section* os);
|
|
|
|
private:
|
|
// The size of an entry in the PLT.
|
|
static const int base_plt_entry_size = (size == 32 ? 16 : 24);
|
|
|
|
// Set the final size.
|
|
void
|
|
set_final_data_size()
|
|
{
|
|
unsigned int full_count = this->count_ + 4;
|
|
|
|
this->set_data_size(full_count * base_plt_entry_size);
|
|
}
|
|
|
|
// Write out the PLT data.
|
|
void
|
|
do_write(Output_file*);
|
|
|
|
// The reloc section.
|
|
Reloc_section* rel_;
|
|
// The number of PLT entries.
|
|
unsigned int count_;
|
|
};
|
|
|
|
// 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_powerpc<size, big_endian>::Output_data_plt_powerpc(Layout* layout)
|
|
: Output_section_data(size == 32 ? 4 : 8), count_(0)
|
|
{
|
|
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_powerpc<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_powerpc<size, big_endian>::add_entry(Symbol* gsym)
|
|
{
|
|
gold_assert(!gsym->has_plt_offset());
|
|
unsigned int index = this->count_+ + 4;
|
|
section_offset_type plt_offset;
|
|
|
|
if (index < 8192)
|
|
plt_offset = index * base_plt_entry_size;
|
|
else
|
|
gold_unreachable();
|
|
|
|
gsym->set_plt_offset(plt_offset);
|
|
|
|
++this->count_;
|
|
|
|
gsym->set_needs_dynsym_entry();
|
|
this->rel_->add_global(gsym, elfcpp::R_POWERPC_JMP_SLOT, this,
|
|
plt_offset, 0);
|
|
}
|
|
|
|
static const unsigned int addis_11_11 = 0x3d6b0000;
|
|
static const unsigned int addis_11_30 = 0x3d7e0000;
|
|
static const unsigned int addis_12_12 = 0x3d8c0000;
|
|
static const unsigned int addi_11_11 = 0x396b0000;
|
|
static const unsigned int add_0_11_11 = 0x7c0b5a14;
|
|
static const unsigned int add_11_0_11 = 0x7d605a14;
|
|
static const unsigned int b = 0x48000000;
|
|
static const unsigned int bcl_20_31 = 0x429f0005;
|
|
static const unsigned int bctr = 0x4e800420;
|
|
static const unsigned int lis_11 = 0x3d600000;
|
|
static const unsigned int lis_12 = 0x3d800000;
|
|
static const unsigned int lwzu_0_12 = 0x840c0000;
|
|
static const unsigned int lwz_0_12 = 0x800c0000;
|
|
static const unsigned int lwz_11_11 = 0x816b0000;
|
|
static const unsigned int lwz_11_30 = 0x817e0000;
|
|
static const unsigned int lwz_12_12 = 0x818c0000;
|
|
static const unsigned int mflr_0 = 0x7c0802a6;
|
|
static const unsigned int mflr_12 = 0x7d8802a6;
|
|
static const unsigned int mtctr_0 = 0x7c0903a6;
|
|
static const unsigned int mtctr_11 = 0x7d6903a6;
|
|
static const unsigned int mtlr_0 = 0x7c0803a6;
|
|
static const unsigned int nop = 0x60000000;
|
|
static const unsigned int sub_11_11_12 = 0x7d6c5850;
|
|
|
|
static const unsigned int addis_r12_r2 = 0x3d820000; /* addis %r12,%r2,xxx@ha */
|
|
static const unsigned int std_r2_40r1 = 0xf8410028; /* std %r2,40(%r1) */
|
|
static const unsigned int ld_r11_0r12 = 0xe96c0000; /* ld %r11,xxx+0@l(%r12) */
|
|
static const unsigned int ld_r2_0r12 = 0xe84c0000; /* ld %r2,xxx+8@l(%r12) */
|
|
/* ld %r11,xxx+16@l(%r12) */
|
|
|
|
|
|
// Write out the PLT.
|
|
|
|
template<int size, bool big_endian>
|
|
void
|
|
Output_data_plt_powerpc<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 += base_plt_entry_size * 4;
|
|
|
|
unsigned int plt_offset = base_plt_entry_size * 4;
|
|
const unsigned int count = this->count_;
|
|
|
|
if (size == 64)
|
|
{
|
|
for (unsigned int i = 0; i < count; i++)
|
|
{
|
|
}
|
|
}
|
|
else
|
|
{
|
|
for (unsigned int i = 0; i < count; i++)
|
|
{
|
|
elfcpp::Swap<32, true>::writeval(pov + 0x00,
|
|
lwz_11_30 + plt_offset);
|
|
elfcpp::Swap<32, true>::writeval(pov + 0x04, mtctr_11);
|
|
elfcpp::Swap<32, true>::writeval(pov + 0x08, bctr);
|
|
elfcpp::Swap<32, true>::writeval(pov + 0x0c, nop);
|
|
pov += base_plt_entry_size;
|
|
plt_offset += base_plt_entry_size;
|
|
}
|
|
}
|
|
|
|
gold_assert(static_cast<section_size_type>(pov - oview) == oview_size);
|
|
|
|
of->write_output_view(offset, oview_size, oview);
|
|
}
|
|
|
|
// Create a PLT entry for a global symbol.
|
|
|
|
template<int size, bool big_endian>
|
|
void
|
|
Target_powerpc<size, big_endian>::make_plt_entry(Symbol_table* symtab,
|
|
Layout* layout,
|
|
Symbol* gsym)
|
|
{
|
|
if (gsym->has_plt_offset())
|
|
return;
|
|
|
|
if (this->plt_ == NULL)
|
|
{
|
|
// Create the GOT section first.
|
|
this->got_section(symtab, layout);
|
|
|
|
// Ensure that .rela.dyn always appears before .rela.plt This is
|
|
// necessary due to how, on PowerPC 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_powerpc<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_PLT, 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);
|
|
}
|
|
|
|
this->plt_->add_entry(gsym);
|
|
}
|
|
|
|
// Return the number of entries in the PLT.
|
|
|
|
template<int size, bool big_endian>
|
|
unsigned int
|
|
Target_powerpc<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_powerpc<size, big_endian>::first_plt_entry_offset() const
|
|
{
|
|
return Output_data_plt_powerpc<size, big_endian>::first_plt_entry_offset();
|
|
}
|
|
|
|
// Return the size of each PLT entry.
|
|
|
|
template<int size, bool big_endian>
|
|
unsigned int
|
|
Target_powerpc<size, big_endian>::plt_entry_size() const
|
|
{
|
|
return Output_data_plt_powerpc<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_powerpc<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, elfcpp::R_POWERPC_DTPMOD, 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)
|
|
{
|
|
// XXX
|
|
default:
|
|
gold_unreachable();
|
|
}
|
|
}
|
|
|
|
// Get the Reference_flags for a particular relocation.
|
|
|
|
template<int size, bool big_endian>
|
|
int
|
|
Target_powerpc<size, big_endian>::Scan::get_reference_flags(
|
|
unsigned int r_type)
|
|
{
|
|
switch (r_type)
|
|
{
|
|
case elfcpp::R_POWERPC_NONE:
|
|
case elfcpp::R_POWERPC_GNU_VTINHERIT:
|
|
case elfcpp::R_POWERPC_GNU_VTENTRY:
|
|
case elfcpp::R_PPC64_TOC:
|
|
// No symbol reference.
|
|
return 0;
|
|
|
|
case elfcpp::R_POWERPC_ADDR16:
|
|
case elfcpp::R_POWERPC_ADDR16_LO:
|
|
case elfcpp::R_POWERPC_ADDR16_HI:
|
|
case elfcpp::R_POWERPC_ADDR16_HA:
|
|
case elfcpp::R_POWERPC_ADDR32:
|
|
case elfcpp::R_PPC64_ADDR64:
|
|
return Symbol::ABSOLUTE_REF;
|
|
|
|
case elfcpp::R_POWERPC_REL24:
|
|
case elfcpp::R_PPC_LOCAL24PC:
|
|
case elfcpp::R_PPC_REL16:
|
|
case elfcpp::R_PPC_REL16_LO:
|
|
case elfcpp::R_PPC_REL16_HI:
|
|
case elfcpp::R_PPC_REL16_HA:
|
|
return Symbol::RELATIVE_REF;
|
|
|
|
case elfcpp::R_PPC_PLTREL24:
|
|
return Symbol::FUNCTION_CALL | Symbol::RELATIVE_REF;
|
|
|
|
case elfcpp::R_POWERPC_GOT16:
|
|
case elfcpp::R_POWERPC_GOT16_LO:
|
|
case elfcpp::R_POWERPC_GOT16_HI:
|
|
case elfcpp::R_POWERPC_GOT16_HA:
|
|
case elfcpp::R_PPC64_TOC16:
|
|
case elfcpp::R_PPC64_TOC16_LO:
|
|
case elfcpp::R_PPC64_TOC16_HI:
|
|
case elfcpp::R_PPC64_TOC16_HA:
|
|
case elfcpp::R_PPC64_TOC16_DS:
|
|
case elfcpp::R_PPC64_TOC16_LO_DS:
|
|
// Absolute in GOT.
|
|
return Symbol::ABSOLUTE_REF;
|
|
|
|
case elfcpp::R_POWERPC_GOT_TPREL16:
|
|
case elfcpp::R_POWERPC_TLS:
|
|
return Symbol::TLS_REF;
|
|
|
|
case elfcpp::R_POWERPC_COPY:
|
|
case elfcpp::R_POWERPC_GLOB_DAT:
|
|
case elfcpp::R_POWERPC_JMP_SLOT:
|
|
case elfcpp::R_POWERPC_RELATIVE:
|
|
case elfcpp::R_POWERPC_DTPMOD:
|
|
default:
|
|
// Not expected. We will give an error later.
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
// Report an unsupported relocation against a local symbol.
|
|
|
|
template<int size, bool big_endian>
|
|
void
|
|
Target_powerpc<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_powerpc<size, big_endian>::Scan::check_non_pic(Relobj* object,
|
|
unsigned int r_type)
|
|
{
|
|
gold_assert(r_type != elfcpp::R_POWERPC_NONE);
|
|
|
|
// These are the relocation types supported by glibc for both 32-bit
|
|
// and 64-bit powerpc.
|
|
switch (r_type)
|
|
{
|
|
case elfcpp::R_POWERPC_RELATIVE:
|
|
case elfcpp::R_POWERPC_GLOB_DAT:
|
|
case elfcpp::R_POWERPC_DTPMOD:
|
|
case elfcpp::R_POWERPC_DTPREL:
|
|
case elfcpp::R_POWERPC_TPREL:
|
|
case elfcpp::R_POWERPC_JMP_SLOT:
|
|
case elfcpp::R_POWERPC_COPY:
|
|
case elfcpp::R_POWERPC_ADDR32:
|
|
case elfcpp::R_POWERPC_ADDR24:
|
|
case elfcpp::R_POWERPC_REL24:
|
|
return;
|
|
|
|
default:
|
|
break;
|
|
}
|
|
|
|
if (size == 64)
|
|
{
|
|
switch (r_type)
|
|
{
|
|
// These are the relocation types supported only on 64-bit.
|
|
case elfcpp::R_PPC64_ADDR64:
|
|
case elfcpp::R_PPC64_TPREL16_LO_DS:
|
|
case elfcpp::R_PPC64_TPREL16_DS:
|
|
case elfcpp::R_POWERPC_TPREL16:
|
|
case elfcpp::R_POWERPC_TPREL16_LO:
|
|
case elfcpp::R_POWERPC_TPREL16_HI:
|
|
case elfcpp::R_POWERPC_TPREL16_HA:
|
|
case elfcpp::R_PPC64_TPREL16_HIGHER:
|
|
case elfcpp::R_PPC64_TPREL16_HIGHEST:
|
|
case elfcpp::R_PPC64_TPREL16_HIGHERA:
|
|
case elfcpp::R_PPC64_TPREL16_HIGHESTA:
|
|
case elfcpp::R_PPC64_ADDR16_LO_DS:
|
|
case elfcpp::R_POWERPC_ADDR16_LO:
|
|
case elfcpp::R_POWERPC_ADDR16_HI:
|
|
case elfcpp::R_POWERPC_ADDR16_HA:
|
|
case elfcpp::R_POWERPC_ADDR30:
|
|
case elfcpp::R_PPC64_UADDR64:
|
|
case elfcpp::R_POWERPC_UADDR32:
|
|
case elfcpp::R_POWERPC_ADDR16:
|
|
case elfcpp::R_POWERPC_UADDR16:
|
|
case elfcpp::R_PPC64_ADDR16_DS:
|
|
case elfcpp::R_PPC64_ADDR16_HIGHER:
|
|
case elfcpp::R_PPC64_ADDR16_HIGHEST:
|
|
case elfcpp::R_PPC64_ADDR16_HIGHERA:
|
|
case elfcpp::R_PPC64_ADDR16_HIGHESTA:
|
|
case elfcpp::R_POWERPC_ADDR14_BRTAKEN:
|
|
case elfcpp::R_POWERPC_ADDR14_BRNTAKEN:
|
|
case elfcpp::R_POWERPC_REL32:
|
|
case elfcpp::R_PPC64_REL64:
|
|
return;
|
|
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
switch (r_type)
|
|
{
|
|
// These are the relocation types supported only on 32-bit.
|
|
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
|
|
// This prevents us from issuing more than one error per reloc
|
|
// section. But we can still wind up issuing more than one
|
|
// error per object file.
|
|
if (this->issued_non_pic_error_)
|
|
return;
|
|
gold_assert(parameters->options().output_is_position_independent());
|
|
object->error(_("requires unsupported dynamic reloc; "
|
|
"recompile with -fPIC"));
|
|
this->issued_non_pic_error_ = true;
|
|
return;
|
|
}
|
|
|
|
// Scan a relocation for a local symbol.
|
|
|
|
template<int size, bool big_endian>
|
|
inline void
|
|
Target_powerpc<size, big_endian>::Scan::local(
|
|
Symbol_table* symtab,
|
|
Layout* layout,
|
|
Target_powerpc<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)
|
|
{
|
|
switch (r_type)
|
|
{
|
|
case elfcpp::R_POWERPC_NONE:
|
|
case elfcpp::R_POWERPC_GNU_VTINHERIT:
|
|
case elfcpp::R_POWERPC_GNU_VTENTRY:
|
|
break;
|
|
|
|
case elfcpp::R_PPC64_ADDR64:
|
|
case elfcpp::R_POWERPC_ADDR32:
|
|
case elfcpp::R_POWERPC_ADDR16_HA:
|
|
case elfcpp::R_POWERPC_ADDR16_LO:
|
|
// 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);
|
|
|
|
check_non_pic(object, r_type);
|
|
if (lsym.get_st_type() != elfcpp::STT_SECTION)
|
|
{
|
|
unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info());
|
|
rela_dyn->add_local(object, r_sym, r_type, output_section,
|
|
data_shndx, reloc.get_r_offset(),
|
|
reloc.get_r_addend());
|
|
}
|
|
else
|
|
{
|
|
unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info());
|
|
gold_assert(lsym.get_st_value() == 0);
|
|
rela_dyn->add_local_relative(object, r_sym, r_type,
|
|
output_section, data_shndx,
|
|
reloc.get_r_offset(),
|
|
reloc.get_r_addend());
|
|
}
|
|
}
|
|
break;
|
|
|
|
case elfcpp::R_POWERPC_REL24:
|
|
case elfcpp::R_PPC_LOCAL24PC:
|
|
case elfcpp::R_POWERPC_REL32:
|
|
case elfcpp::R_PPC_REL16_LO:
|
|
case elfcpp::R_PPC_REL16_HA:
|
|
break;
|
|
|
|
case elfcpp::R_POWERPC_GOT16:
|
|
case elfcpp::R_POWERPC_GOT16_LO:
|
|
case elfcpp::R_POWERPC_GOT16_HI:
|
|
case elfcpp::R_POWERPC_GOT16_HA:
|
|
case elfcpp::R_PPC64_TOC16:
|
|
case elfcpp::R_PPC64_TOC16_LO:
|
|
case elfcpp::R_PPC64_TOC16_HI:
|
|
case elfcpp::R_PPC64_TOC16_HA:
|
|
case elfcpp::R_PPC64_TOC16_DS:
|
|
case elfcpp::R_PPC64_TOC16_LO_DS:
|
|
{
|
|
// 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;
|
|
|
|
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_POWERPC_RELATIVE,
|
|
got, off, 0);
|
|
}
|
|
}
|
|
else
|
|
got->add_local(object, r_sym, GOT_TYPE_STANDARD);
|
|
}
|
|
break;
|
|
|
|
case elfcpp::R_PPC64_TOC:
|
|
// We need a GOT section.
|
|
target->got_section(symtab, layout);
|
|
break;
|
|
|
|
// These are relocations which should only be seen by the
|
|
// dynamic linker, and should never be seen here.
|
|
case elfcpp::R_POWERPC_COPY:
|
|
case elfcpp::R_POWERPC_GLOB_DAT:
|
|
case elfcpp::R_POWERPC_JMP_SLOT:
|
|
case elfcpp::R_POWERPC_RELATIVE:
|
|
case elfcpp::R_POWERPC_DTPMOD:
|
|
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_powerpc<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_powerpc<size, big_endian>::Scan::global(
|
|
Symbol_table* symtab,
|
|
Layout* layout,
|
|
Target_powerpc<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)
|
|
{
|
|
switch (r_type)
|
|
{
|
|
case elfcpp::R_POWERPC_NONE:
|
|
case elfcpp::R_POWERPC_GNU_VTINHERIT:
|
|
case elfcpp::R_POWERPC_GNU_VTENTRY:
|
|
break;
|
|
|
|
case elfcpp::R_PPC_PLTREL24:
|
|
// 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_POWERPC_ADDR16:
|
|
case elfcpp::R_POWERPC_ADDR16_LO:
|
|
case elfcpp::R_POWERPC_ADDR16_HI:
|
|
case elfcpp::R_POWERPC_ADDR16_HA:
|
|
case elfcpp::R_POWERPC_ADDR32:
|
|
case elfcpp::R_PPC64_ADDR64:
|
|
{
|
|
// 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)))
|
|
{
|
|
if (gsym->may_need_copy_reloc())
|
|
{
|
|
target->copy_reloc(symtab, layout, object,
|
|
data_shndx, output_section, gsym, reloc);
|
|
}
|
|
else if ((r_type == elfcpp::R_POWERPC_ADDR32
|
|
|| r_type == elfcpp::R_PPC64_ADDR64)
|
|
&& gsym->can_use_relative_reloc(false))
|
|
{
|
|
Reloc_section* rela_dyn = target->rela_dyn_section(layout);
|
|
rela_dyn->add_global_relative(gsym, elfcpp::R_POWERPC_RELATIVE,
|
|
output_section, object,
|
|
data_shndx, reloc.get_r_offset(),
|
|
reloc.get_r_addend());
|
|
}
|
|
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, r_type, output_section,
|
|
object, data_shndx,
|
|
reloc.get_r_offset(),
|
|
reloc.get_r_addend());
|
|
else
|
|
rela_dyn->add_global_relative(gsym, r_type,
|
|
output_section, object,
|
|
data_shndx,
|
|
reloc.get_r_offset(),
|
|
reloc.get_r_addend());
|
|
}
|
|
}
|
|
}
|
|
break;
|
|
|
|
case elfcpp::R_POWERPC_REL24:
|
|
case elfcpp::R_PPC_LOCAL24PC:
|
|
case elfcpp::R_PPC_REL16:
|
|
case elfcpp::R_PPC_REL16_LO:
|
|
case elfcpp::R_PPC_REL16_HI:
|
|
case elfcpp::R_PPC_REL16_HA:
|
|
{
|
|
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 (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, r_type, output_section, object,
|
|
data_shndx, reloc.get_r_offset(),
|
|
reloc.get_r_addend());
|
|
}
|
|
}
|
|
}
|
|
break;
|
|
|
|
case elfcpp::R_POWERPC_GOT16:
|
|
case elfcpp::R_POWERPC_GOT16_LO:
|
|
case elfcpp::R_POWERPC_GOT16_HI:
|
|
case elfcpp::R_POWERPC_GOT16_HA:
|
|
case elfcpp::R_PPC64_TOC16:
|
|
case elfcpp::R_PPC64_TOC16_LO:
|
|
case elfcpp::R_PPC64_TOC16_HI:
|
|
case elfcpp::R_PPC64_TOC16_HA:
|
|
case elfcpp::R_PPC64_TOC16_DS:
|
|
case elfcpp::R_PPC64_TOC16_LO_DS:
|
|
{
|
|
// 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())
|
|
got->add_global(gsym, GOT_TYPE_STANDARD);
|
|
else
|
|
{
|
|
// If this symbol is not fully resolved, we need to add a
|
|
// dynamic relocation for it.
|
|
Reloc_section* rela_dyn = target->rela_dyn_section(layout);
|
|
if (gsym->is_from_dynobj()
|
|
|| gsym->is_undefined()
|
|
|| gsym->is_preemptible())
|
|
got->add_global_with_rela(gsym, GOT_TYPE_STANDARD, rela_dyn,
|
|
elfcpp::R_POWERPC_GLOB_DAT);
|
|
else if (!gsym->has_got_offset(GOT_TYPE_STANDARD))
|
|
{
|
|
unsigned int off = got->add_constant(0);
|
|
|
|
gsym->set_got_offset(GOT_TYPE_STANDARD, off);
|
|
rela_dyn->add_global_relative(gsym, elfcpp::R_POWERPC_RELATIVE,
|
|
got, off, 0);
|
|
}
|
|
}
|
|
}
|
|
break;
|
|
|
|
case elfcpp::R_PPC64_TOC:
|
|
// We need a GOT section.
|
|
target->got_section(symtab, layout);
|
|
break;
|
|
|
|
case elfcpp::R_POWERPC_GOT_TPREL16:
|
|
case elfcpp::R_POWERPC_TLS:
|
|
// XXX TLS
|
|
break;
|
|
|
|
// These are relocations which should only be seen by the
|
|
// dynamic linker, and should never be seen here.
|
|
case elfcpp::R_POWERPC_COPY:
|
|
case elfcpp::R_POWERPC_GLOB_DAT:
|
|
case elfcpp::R_POWERPC_JMP_SLOT:
|
|
case elfcpp::R_POWERPC_RELATIVE:
|
|
case elfcpp::R_POWERPC_DTPMOD:
|
|
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_powerpc<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_powerpc<size, big_endian> Powerpc;
|
|
typedef typename Target_powerpc<size, big_endian>::Scan Scan;
|
|
|
|
gold::gc_process_relocs<size, big_endian, Powerpc, elfcpp::SHT_RELA, Scan,
|
|
typename Target_powerpc::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_powerpc<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_powerpc<size, big_endian> Powerpc;
|
|
typedef typename Target_powerpc<size, big_endian>::Scan Scan;
|
|
static Output_data_space* sdata;
|
|
|
|
if (sh_type == elfcpp::SHT_REL)
|
|
{
|
|
gold_error(_("%s: unsupported REL reloc section"),
|
|
object->name().c_str());
|
|
return;
|
|
}
|
|
|
|
// Define _SDA_BASE_ at the start of the .sdata section.
|
|
if (sdata == NULL)
|
|
{
|
|
// layout->find_output_section(".sdata") == NULL
|
|
sdata = new Output_data_space(4, "** sdata");
|
|
Output_section* os = layout->add_output_section_data(".sdata", 0,
|
|
elfcpp::SHF_ALLOC
|
|
| elfcpp::SHF_WRITE,
|
|
sdata,
|
|
ORDER_SMALL_DATA,
|
|
false);
|
|
symtab->define_in_output_data("_SDA_BASE_", NULL,
|
|
Symbol_table::PREDEFINED,
|
|
os,
|
|
32768, 0,
|
|
elfcpp::STT_OBJECT,
|
|
elfcpp::STB_LOCAL,
|
|
elfcpp::STV_HIDDEN, 0,
|
|
false, false);
|
|
}
|
|
|
|
gold::scan_relocs<size, big_endian, Powerpc, 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_powerpc<size, big_endian>::do_finalize_sections(
|
|
Layout* layout,
|
|
const Input_objects*,
|
|
Symbol_table*)
|
|
{
|
|
// 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, size == 32);
|
|
|
|
// 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));
|
|
}
|
|
|
|
// Perform a relocation.
|
|
|
|
template<int size, bool big_endian>
|
|
inline bool
|
|
Target_powerpc<size, big_endian>::Relocate::relocate(
|
|
const Relocate_info<size, big_endian>* relinfo,
|
|
Target_powerpc* 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 */)
|
|
{
|
|
const unsigned int toc_base_offset = 0x8000;
|
|
typedef Powerpc_relocate_functions<size, big_endian> Reloc;
|
|
|
|
// 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_section()->address() + gsym->plt_offset();
|
|
|
|
symval.set_output_value(value);
|
|
|
|
psymval = &symval;
|
|
}
|
|
|
|
const Sized_relobj_file<size, big_endian>* object = relinfo->object;
|
|
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;
|
|
unsigned int got2_offset = 0;
|
|
switch (r_type)
|
|
{
|
|
case elfcpp::R_PPC64_TOC16:
|
|
case elfcpp::R_PPC64_TOC16_LO:
|
|
case elfcpp::R_PPC64_TOC16_HI:
|
|
case elfcpp::R_PPC64_TOC16_HA:
|
|
case elfcpp::R_PPC64_TOC16_DS:
|
|
case elfcpp::R_PPC64_TOC16_LO_DS:
|
|
// Subtract the TOC base address.
|
|
addend -= target->toc_section()->address() + toc_base_offset;
|
|
/* FALLTHRU */
|
|
|
|
case elfcpp::R_POWERPC_GOT16:
|
|
case elfcpp::R_POWERPC_GOT16_LO:
|
|
case elfcpp::R_POWERPC_GOT16_HI:
|
|
case elfcpp::R_POWERPC_GOT16_HA:
|
|
case elfcpp::R_PPC64_GOT16_DS:
|
|
case elfcpp::R_PPC64_GOT16_LO_DS:
|
|
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;
|
|
|
|
// R_PPC_PLTREL24 is rather special. If non-zero,
|
|
// the addend specifies the GOT pointer offset within .got2.
|
|
case elfcpp::R_PPC_PLTREL24:
|
|
if (addend >= 32768)
|
|
{
|
|
Output_data_space* got2;
|
|
got2 = target->got2_section();
|
|
got2_offset = got2->offset();
|
|
addend += got2_offset;
|
|
}
|
|
break;
|
|
|
|
default:
|
|
break;
|
|
}
|
|
|
|
switch (r_type)
|
|
{
|
|
case elfcpp::R_POWERPC_NONE:
|
|
case elfcpp::R_POWERPC_GNU_VTINHERIT:
|
|
case elfcpp::R_POWERPC_GNU_VTENTRY:
|
|
break;
|
|
|
|
case elfcpp::R_POWERPC_REL32:
|
|
Reloc::rel32(view, object, psymval, addend, address);
|
|
break;
|
|
|
|
case elfcpp::R_POWERPC_REL24:
|
|
Reloc::rel24(view, object, psymval, addend, address);
|
|
break;
|
|
|
|
case elfcpp::R_POWERPC_REL14:
|
|
Reloc::rel14(view, object, psymval, addend, address);
|
|
break;
|
|
|
|
case elfcpp::R_PPC_PLTREL24:
|
|
Reloc::rel24(view, object, psymval, addend, address);
|
|
break;
|
|
|
|
case elfcpp::R_PPC_LOCAL24PC:
|
|
Reloc::rel24(view, object, psymval, addend, address);
|
|
break;
|
|
|
|
case elfcpp::R_PPC64_ADDR64:
|
|
if (!parameters->options().output_is_position_independent())
|
|
Relocate_functions<size, big_endian>::rela64(view, object,
|
|
psymval, addend);
|
|
break;
|
|
|
|
case elfcpp::R_POWERPC_ADDR32:
|
|
if (!parameters->options().output_is_position_independent())
|
|
Relocate_functions<size, big_endian>::rela32(view, object,
|
|
psymval, addend);
|
|
break;
|
|
|
|
case elfcpp::R_POWERPC_ADDR16_LO:
|
|
Reloc::addr16_lo(view, object, psymval, addend);
|
|
break;
|
|
|
|
case elfcpp::R_POWERPC_ADDR16_HI:
|
|
Reloc::addr16_hi(view, object, psymval, addend);
|
|
break;
|
|
|
|
case elfcpp::R_POWERPC_ADDR16_HA:
|
|
Reloc::addr16_ha(view, object, psymval, addend);
|
|
break;
|
|
|
|
case elfcpp::R_PPC_REL16_LO:
|
|
Reloc::rel16_lo(view, object, psymval, addend, address);
|
|
break;
|
|
|
|
case elfcpp::R_PPC_REL16_HI:
|
|
Reloc::rel16_lo(view, object, psymval, addend, address);
|
|
break;
|
|
|
|
case elfcpp::R_PPC_REL16_HA:
|
|
Reloc::rel16_ha(view, object, psymval, addend, address);
|
|
break;
|
|
|
|
case elfcpp::R_POWERPC_GOT16:
|
|
Reloc::addr16(view, got_offset, addend);
|
|
break;
|
|
|
|
case elfcpp::R_POWERPC_GOT16_LO:
|
|
Reloc::addr16_lo(view, got_offset, addend);
|
|
break;
|
|
|
|
case elfcpp::R_POWERPC_GOT16_HI:
|
|
Reloc::addr16_hi(view, got_offset, addend);
|
|
break;
|
|
|
|
case elfcpp::R_POWERPC_GOT16_HA:
|
|
Reloc::addr16_ha(view, got_offset, addend);
|
|
break;
|
|
|
|
case elfcpp::R_PPC64_TOC16:
|
|
Reloc::addr16(view, got_offset, addend);
|
|
break;
|
|
|
|
case elfcpp::R_PPC64_TOC16_LO:
|
|
Reloc::addr16_lo(view, got_offset, addend);
|
|
break;
|
|
|
|
case elfcpp::R_PPC64_TOC16_HI:
|
|
Reloc::addr16_hi(view, got_offset, addend);
|
|
break;
|
|
|
|
case elfcpp::R_PPC64_TOC16_HA:
|
|
Reloc::addr16_ha(view, got_offset, addend);
|
|
break;
|
|
|
|
case elfcpp::R_PPC64_TOC16_DS:
|
|
case elfcpp::R_PPC64_TOC16_LO_DS:
|
|
Reloc::addr16_ds(view, got_offset, addend);
|
|
break;
|
|
|
|
case elfcpp::R_PPC64_TOC:
|
|
{
|
|
elfcpp::Elf_types<64>::Elf_Addr value;
|
|
value = target->toc_section()->address() + toc_base_offset;
|
|
Relocate_functions<64, false>::rela64(view, value, addend);
|
|
}
|
|
break;
|
|
|
|
case elfcpp::R_POWERPC_COPY:
|
|
case elfcpp::R_POWERPC_GLOB_DAT:
|
|
case elfcpp::R_POWERPC_JMP_SLOT:
|
|
case elfcpp::R_POWERPC_RELATIVE:
|
|
// This is an outstanding tls reloc, which is unexpected when
|
|
// linking.
|
|
case elfcpp::R_POWERPC_DTPMOD:
|
|
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_powerpc<size, big_endian>::Relocate::relocate_tls(
|
|
const Relocate_info<size, big_endian>* relinfo,
|
|
Target_powerpc<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 Powerpc_relocate_functions<size, big_endian> Reloc;
|
|
const Sized_relobj_file<size, big_endian>* object = relinfo->object;
|
|
|
|
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)
|
|
{
|
|
// XXX
|
|
}
|
|
}
|
|
|
|
// Relocate section data.
|
|
|
|
template<int size, bool big_endian>
|
|
void
|
|
Target_powerpc<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_powerpc<size, big_endian> Powerpc;
|
|
typedef typename Target_powerpc<size, big_endian>::Relocate Powerpc_relocate;
|
|
|
|
gold_assert(sh_type == elfcpp::SHT_RELA);
|
|
|
|
gold::relocate_section<size, big_endian, Powerpc, elfcpp::SHT_RELA,
|
|
Powerpc_relocate>(
|
|
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_powerpc<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_powerpc<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);
|
|
}
|
|
|
|
// Relocate a section during a relocatable link.
|
|
|
|
template<int size, bool big_endian>
|
|
void
|
|
Target_powerpc<size, big_endian>::relocate_for_relocatable(
|
|
const Relocate_info<size, big_endian>* relinfo,
|
|
unsigned int sh_type,
|
|
const unsigned char* prelocs,
|
|
size_t reloc_count,
|
|
Output_section* output_section,
|
|
off_t 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_for_relocatable<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_powerpc<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();
|
|
}
|
|
|
|
// The selector for powerpc object files.
|
|
|
|
template<int size, bool big_endian>
|
|
class Target_selector_powerpc : public Target_selector
|
|
{
|
|
public:
|
|
Target_selector_powerpc()
|
|
: Target_selector(elfcpp::EM_NONE, size, big_endian,
|
|
(size == 64
|
|
? (big_endian ? "elf64-powerpc" : "elf64-powerpcle")
|
|
: (big_endian ? "elf32-powerpc" : "elf32-powerpcle")),
|
|
(size == 64
|
|
? (big_endian ? "elf64ppc" : "elf64lppc")
|
|
: (big_endian ? "elf32ppc" : "elf32lppc")))
|
|
{ }
|
|
|
|
Target* do_recognize(int machine, int, int)
|
|
{
|
|
switch (size)
|
|
{
|
|
case 64:
|
|
if (machine != elfcpp::EM_PPC64)
|
|
return NULL;
|
|
break;
|
|
|
|
case 32:
|
|
if (machine != elfcpp::EM_PPC)
|
|
return NULL;
|
|
break;
|
|
|
|
default:
|
|
return NULL;
|
|
}
|
|
|
|
return this->instantiate_target();
|
|
}
|
|
|
|
Target* do_instantiate_target()
|
|
{ return new Target_powerpc<size, big_endian>(); }
|
|
};
|
|
|
|
Target_selector_powerpc<32, true> target_selector_ppc32;
|
|
Target_selector_powerpc<32, false> target_selector_ppc32le;
|
|
Target_selector_powerpc<64, true> target_selector_ppc64;
|
|
Target_selector_powerpc<64, false> target_selector_ppc64le;
|
|
|
|
} // End anonymous namespace.
|