diff options
Diffstat (limited to 'binutils-2.22/gold/sparc.cc')
| -rw-r--r-- | binutils-2.22/gold/sparc.cc | 1368 |
1 files changed, 1111 insertions, 257 deletions
diff --git a/binutils-2.22/gold/sparc.cc b/binutils-2.22/gold/sparc.cc index 5f67a4e..7b78311 100644 --- a/binutils-2.22/gold/sparc.cc +++ b/binutils-2.22/gold/sparc.cc @@ -1,6 +1,6 @@ // sparc.cc -- sparc target support for gold. -// Copyright 2008, 2009, 2010, 2011 Free Software Foundation, Inc. +// Copyright 2008, 2009, 2010, 2011, 2012 Free Software Foundation, Inc. // Written by David S. Miller <davem@davemloft.net>. // This file is part of gold. @@ -58,26 +58,28 @@ class Target_sparc : public Sized_target<size, big_endian> Target_sparc() : Sized_target<size, big_endian>(&sparc_info), - got_(NULL), plt_(NULL), rela_dyn_(NULL), + got_(NULL), plt_(NULL), rela_dyn_(NULL), rela_ifunc_(NULL), copy_relocs_(elfcpp::R_SPARC_COPY), dynbss_(NULL), - got_mod_index_offset_(-1U), tls_get_addr_sym_(NULL) + got_mod_index_offset_(-1U), tls_get_addr_sym_(NULL), + elf_machine_(sparc_info.machine_code), elf_flags_(0), + elf_flags_set_(false) { } - // Process the relocations to determine unreferenced sections for + // Process the relocations to determine unreferenced sections for // garbage collection. void gc_process_relocs(Symbol_table* symtab, - Layout* layout, - Sized_relobj_file<size, big_endian>* object, - unsigned int data_shndx, - unsigned int sh_type, - const unsigned char* prelocs, - size_t reloc_count, - Output_section* output_section, - bool needs_special_offset_handling, - size_t local_symbol_count, - const unsigned char* plocal_symbols); + 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); // Scan the relocations to look for symbol adjustments. void @@ -154,6 +156,15 @@ class Target_sparc : public Sized_target<size, big_endian> return strcmp(sym->name(), "___tls_get_addr") == 0; } + // Return the PLT address to use for a global symbol. + uint64_t + do_plt_address_for_global(const Symbol* gsym) const + { return this->plt_section()->address_for_global(gsym); } + + uint64_t + do_plt_address_for_local(const Relobj* relobj, unsigned int symndx) const + { return this->plt_section()->address_for_local(relobj, symndx); } + // Return whether there is a GOT section. bool has_got_section() const @@ -176,6 +187,15 @@ class Target_sparc : public Sized_target<size, big_endian> return this->got_size() / (size / 8); } + // Return the address of the GOT. + uint64_t + got_address() const + { + if (this->got_ == NULL) + return 0; + return this->got_->address(); + } + // Return the number of entries in the PLT. unsigned int plt_entry_count() const; @@ -188,6 +208,15 @@ class Target_sparc : public Sized_target<size, big_endian> unsigned int plt_entry_size() const; + protected: + // Make an ELF object. + Object* + do_make_elf_object(const std::string&, Input_file*, off_t, + const elfcpp::Ehdr<size, big_endian>& ehdr); + + void + do_adjust_elf_header(unsigned char* view, int len) const; + private: // The class which scans relocations. @@ -219,24 +248,24 @@ class Target_sparc : public Sized_target<size, big_endian> inline bool local_reloc_may_be_function_pointer(Symbol_table* , Layout* , - Target_sparc* , - Sized_relobj_file<size, big_endian>* , - unsigned int , - Output_section* , - const elfcpp::Rela<size, big_endian>& , + Target_sparc* , + Sized_relobj_file<size, big_endian>* , + unsigned int , + Output_section* , + const elfcpp::Rela<size, big_endian>& , unsigned int , - const elfcpp::Sym<size, big_endian>&) + const elfcpp::Sym<size, big_endian>&) { return false; } inline bool global_reloc_may_be_function_pointer(Symbol_table* , Layout* , - Target_sparc* , - Sized_relobj_file<size, big_endian>* , - unsigned int , - Output_section* , - const elfcpp::Rela<size, - big_endian>& , - unsigned int , Symbol*) + Target_sparc* , + Sized_relobj_file<size, big_endian>* , + unsigned int , + Output_section* , + const elfcpp::Rela<size, + big_endian>& , + unsigned int , Symbol*) { return false; } @@ -256,6 +285,10 @@ class Target_sparc : public Sized_target<size, big_endian> void check_non_pic(Relobj*, unsigned int r_type); + bool + reloc_needs_plt_for_ifunc(Sized_relobj_file<size, big_endian>*, + unsigned int r_type); + // Whether we have issued an error about a non-PIC compilation. bool issued_non_pic_error_; }; @@ -293,13 +326,19 @@ class Target_sparc : public Sized_target<size, big_endian> // Do a TLS relocation. inline void relocate_tls(const Relocate_info<size, big_endian>*, Target_sparc* target, - size_t relnum, const elfcpp::Rela<size, big_endian>&, + size_t relnum, const elfcpp::Rela<size, big_endian>&, unsigned int r_type, const Sized_symbol<size>*, const Symbol_value<size>*, unsigned char*, typename elfcpp::Elf_types<size>::Elf_Addr, section_size_type); + inline void + relax_call(Target_sparc<size, big_endian>* target, + unsigned char* view, + const elfcpp::Rela<size, big_endian>& rela, + section_size_type view_size); + // Ignore the next relocation which should be R_SPARC_TLS_GD_ADD bool ignore_gd_add_; @@ -320,10 +359,20 @@ class Target_sparc : public Sized_target<size, big_endian> Output_data_got<size, big_endian>* got_section(Symbol_table*, Layout*); + // Create the PLT section. + void + make_plt_section(Symbol_table* symtab, Layout* layout); + // Create a PLT entry for a global symbol. void make_plt_entry(Symbol_table*, Layout*, Symbol*); + // Create a PLT entry for a local STT_GNU_IFUNC symbol. + void + make_local_ifunc_plt_entry(Symbol_table*, Layout*, + Sized_relobj_file<size, big_endian>* relobj, + unsigned int local_sym_index); + // Create a GOT entry for the TLS module index. unsigned int got_mod_index_entry(Symbol_table* symtab, Layout* layout, @@ -341,7 +390,7 @@ class Target_sparc : public Sized_target<size, big_endian> } // Get the PLT section. - const Output_data_plt_sparc<size, big_endian>* + Output_data_plt_sparc<size, big_endian>* plt_section() const { gold_assert(this->plt_ != NULL); @@ -352,10 +401,14 @@ class Target_sparc : public Sized_target<size, big_endian> Reloc_section* rela_dyn_section(Layout*); + // Get the section to use for IFUNC relocations. + Reloc_section* + rela_ifunc_section(Layout*); + // Copy a relocation against a global symbol. void copy_reloc(Symbol_table* symtab, Layout* layout, - Sized_relobj_file<size, big_endian>* object, + Sized_relobj_file<size, big_endian>* object, unsigned int shndx, Output_section* output_section, Symbol* sym, const elfcpp::Rela<size, big_endian>& reloc) { @@ -386,6 +439,8 @@ class Target_sparc : public Sized_target<size, big_endian> Output_data_plt_sparc<size, big_endian>* plt_; // The dynamic reloc section. Reloc_section* rela_dyn_; + // The section to use for IFUNC relocs. + Reloc_section* rela_ifunc_; // Relocs saved to avoid a COPY reloc. Copy_relocs<elfcpp::SHT_RELA, size, big_endian> copy_relocs_; // Space for variables copied with a COPY reloc. @@ -394,6 +449,12 @@ class Target_sparc : public Sized_target<size, big_endian> unsigned int got_mod_index_offset_; // Cached pointer to __tls_get_addr symbol Symbol* tls_get_addr_sym_; + // Accumulated elf machine type + elfcpp::Elf_Half elf_machine_; + // Accumulated elf header flags + elfcpp::Elf_Word elf_flags_; + // Whether elf_flags_ has been set for the first time yet + bool elf_flags_set_; }; template<> @@ -412,6 +473,8 @@ Target::Target_info Target_sparc<32, true>::sparc_info = 0x00010000, // 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 @@ -436,6 +499,8 @@ Target::Target_info Target_sparc<64, true>::sparc_info = 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 @@ -617,6 +682,29 @@ public: 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, @@ -832,6 +920,16 @@ public: 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, @@ -1003,6 +1101,28 @@ public: 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, + 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); + int32_t reloc = static_cast<int32_t>(value + addend); + + 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, @@ -1044,6 +1164,26 @@ public: 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, + 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); + int32_t reloc = static_cast<int32_t>(value + addend); + + 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, @@ -1112,6 +1252,30 @@ Target_sparc<size, big_endian>::rela_dyn_section(Layout* layout) 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> @@ -1124,7 +1288,13 @@ class Output_data_plt_sparc : public Output_section_data Output_data_plt_sparc(Layout*); // Add an entry to the PLT. - void add_entry(Symbol* gsym); + 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 @@ -1132,10 +1302,22 @@ class Output_data_plt_sparc : public Output_section_data 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_; } + { return this->count_ + this->ifunc_count_; } // Return the offset of the first non-reserved PLT entry. static unsigned int @@ -1147,6 +1329,14 @@ class Output_data_plt_sparc : public Output_section_data 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); @@ -1166,34 +1356,69 @@ class Output_data_plt_sparc : public Output_section_data (plt_entries_per_block * (plt_insn_chunk_size + plt_pointer_chunk_size)); - // Set the final size. - void - set_final_data_size() + section_offset_type + plt_index_to_offset(unsigned int index) { - unsigned int full_count = this->count_ + 4; - unsigned int extra = (size == 32 ? 4 : 0); + section_offset_type offset; - if (size == 32 || full_count < 32768) - this->set_data_size((full_count * base_plt_entry_size) + extra); + if (size == 32 || index < 32768) + offset = index * base_plt_entry_size; else { - unsigned int ext_cnt = full_count - 32768; + unsigned int ext_index = index - 32768; - this->set_data_size((32768 * base_plt_entry_size) - + (ext_cnt - * (plt_insn_chunk_size - + plt_pointer_chunk_size))); + 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. @@ -1220,7 +1445,8 @@ const unsigned int Output_data_plt_sparc<size, big_endian>::plt_block_size; 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), count_(0) + : 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, @@ -1239,38 +1465,171 @@ Output_data_plt_sparc<size, big_endian>::do_adjust_output_section(Output_section template<int size, bool big_endian> void -Output_data_plt_sparc<size, big_endian>::add_entry(Symbol* gsym) +Output_data_plt_sparc<size, big_endian>::add_entry(Symbol_table* symtab, + Layout* layout, + Symbol* gsym) { gold_assert(!gsym->has_plt_offset()); - unsigned int index = this->count_ + 4; section_offset_type plt_offset; + unsigned int index; - if (size == 32 || index < 32768) - plt_offset = index * base_plt_entry_size; + 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 { - unsigned int ext_index = index - 32768; + 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); + } - plt_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); + // 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); } - gsym->set_plt_offset(plt_offset); + 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); + } +} - ++this->count_; +// Return where the IFUNC relocations should go in the PLT. These +// follow the non-IFUNC relocations. - // Every PLT entry needs a reloc. - gsym->set_needs_dynsym_entry(); - this->rel_->add_global(gsym, elfcpp::R_SPARC_JMP_SLOT, this, - plt_offset, 0); +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_; +} - // 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. +// 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; +} + +// 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*, + unsigned int) +{ + return this->address() + plt_index_to_offset(this->count_ + 4); } static const unsigned int sparc_nop = 0x01000000; @@ -1298,10 +1657,10 @@ Output_data_plt_sparc<size, big_endian>::do_write(Output_file* of) unsigned char* pov = oview; memset(pov, 0, base_plt_entry_size * 4); - pov += 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->count_; + const unsigned int count = this->entry_count(); if (size == 64) { @@ -1421,6 +1780,38 @@ Output_data_plt_sparc<size, big_endian>::do_write(Output_file* of) 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> @@ -1433,33 +1824,29 @@ Target_sparc<size, big_endian>::make_plt_entry(Symbol_table* symtab, return; if (this->plt_ == NULL) - { - // Create the GOT sections first. - this->got_section(symtab, layout); + this->make_plt_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_PLT, false); + this->plt_->add_entry(symtab, layout, gsym); +} - // 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); - } +// Make a PLT entry for a local STT_GNU_IFUNC symbol. - this->plt_->add_entry(gsym); +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. @@ -1605,6 +1992,7 @@ Target_sparc<size, big_endian>::Scan::get_reference_flags(unsigned int r_type) 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: @@ -1639,6 +2027,7 @@ Target_sparc<size, big_endian>::Scan::get_reference_flags(unsigned int r_type) 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: @@ -1685,7 +2074,9 @@ Target_sparc<size, big_endian>::Scan::get_reference_flags(unsigned int r_type) 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: @@ -1737,10 +2128,12 @@ Target_sparc<size, big_endian>::Scan::check_non_pic(Relobj* object, unsigned int { // 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: @@ -1755,6 +2148,7 @@ Target_sparc<size, big_endian>::Scan::check_non_pic(Relobj* object, unsigned int 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: @@ -1776,10 +2170,12 @@ Target_sparc<size, big_endian>::Scan::check_non_pic(Relobj* object, unsigned int { // 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: @@ -1814,6 +2210,22 @@ Target_sparc<size, big_endian>::Scan::check_non_pic(Relobj* object, unsigned int 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> @@ -1829,9 +2241,17 @@ Target_sparc<size, big_endian>::Scan::local( unsigned int r_type, const elfcpp::Sym<size, big_endian>& lsym) { + 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: @@ -1849,18 +2269,19 @@ Target_sparc<size, big_endian>::Scan::local( // 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, + { + 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()); - } + 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: @@ -1884,26 +2305,26 @@ Target_sparc<size, big_endian>::Scan::local( // 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()); + { + 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, + 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); + } + 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: @@ -1911,6 +2332,7 @@ Target_sparc<size, big_endian>::Scan::local( 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: @@ -1922,13 +2344,17 @@ Target_sparc<size, big_endian>::Scan::local( 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; + // 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()); @@ -1940,13 +2366,11 @@ Target_sparc<size, big_endian>::Scan::local( 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); + 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); + got, off, 0, is_ifunc); } } else @@ -1977,7 +2401,7 @@ Target_sparc<size, big_endian>::Scan::local( { bool output_is_shared = parameters->options().shared(); const tls::Tls_optimization optimized_type - = optimize_tls_reloc(!output_is_shared, r_type); + = optimize_tls_reloc(!output_is_shared, r_type); switch (r_type) { case elfcpp::R_SPARC_TLS_GD_HI22: // Global-dynamic @@ -1986,11 +2410,11 @@ Target_sparc<size, big_endian>::Scan::local( 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()); + // 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); @@ -1998,14 +2422,14 @@ Target_sparc<size, big_endian>::Scan::local( object->error(_("local symbol %u has bad shndx %u"), r_sym, shndx); else - got->add_local_pair_with_rela(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), - 0); + 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), + 0); if (r_type == elfcpp::R_SPARC_TLS_GD_CALL) generate_tls_call(symtab, layout, target); } @@ -2070,11 +2494,11 @@ Target_sparc<size, big_endian>::Scan::local( 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, + // 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); } @@ -2088,7 +2512,9 @@ Target_sparc<size, big_endian>::Scan::local( 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: @@ -2134,6 +2560,7 @@ Target_sparc<size, big_endian>::Scan::global( 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 @@ -2143,6 +2570,12 @@ Target_sparc<size, big_endian>::Scan::global( 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: @@ -2167,8 +2600,8 @@ Target_sparc<size, big_endian>::Scan::global( // 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()) + && !gsym->is_from_dynobj() + && !gsym->is_preemptible()) break; target->make_plt_entry(symtab, layout, gsym); break; @@ -2186,6 +2619,7 @@ Target_sparc<size, big_endian>::Scan::global( 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); @@ -2214,6 +2648,7 @@ Target_sparc<size, big_endian>::Scan::global( 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: @@ -2234,24 +2669,24 @@ Target_sparc<size, big_endian>::Scan::global( 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))) - { + // 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. + // for dwarf2 cfi directives. switch (r_type) { case elfcpp::R_SPARC_16: @@ -2280,24 +2715,45 @@ Target_sparc<size, big_endian>::Scan::global( break; } - if (gsym->may_need_copy_reloc()) - { - target->copy_reloc(symtab, layout, object, - data_shndx, output_section, gsym, reloc); - } - else if ((r_type == elfcpp::R_SPARC_32 + if (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, + && 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()); - } - else - { - Reloc_section* rela_dyn = target->rela_dyn_section(layout); + 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() @@ -2313,43 +2769,96 @@ Target_sparc<size, big_endian>::Scan::global( 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; + // 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_SPARC_GLOB_DAT); - else if (!gsym->has_got_offset(GOT_TYPE_STANDARD)) - { + 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); + got, off, 0, is_ifunc); } - } + } } break; @@ -2376,7 +2885,7 @@ Target_sparc<size, big_endian>::Scan::global( { const bool is_final = gsym->final_value_is_known(); const tls::Tls_optimization optimized_type - = optimize_tls_reloc(is_final, r_type); + = optimize_tls_reloc(is_final, r_type); switch (r_type) { case elfcpp::R_SPARC_TLS_GD_HI22: // Global-dynamic @@ -2385,18 +2894,18 @@ Target_sparc<size, big_endian>::Scan::global( 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_rela(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)); + // 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) @@ -2404,14 +2913,14 @@ Target_sparc<size, big_endian>::Scan::global( } 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_rela(gsym, GOT_TYPE_TLS_OFFSET, - target->rela_dyn_section(layout), - (size == 64 ? - elfcpp::R_SPARC_TLS_TPOFF64 : - elfcpp::R_SPARC_TLS_TPOFF32)); + // 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); @@ -2462,11 +2971,11 @@ Target_sparc<size, big_endian>::Scan::global( // 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_rela(gsym, GOT_TYPE_TLS_OFFSET, - target->rela_dyn_section(layout), - (size == 64 ? - elfcpp::R_SPARC_TLS_TPOFF64 : - elfcpp::R_SPARC_TLS_TPOFF32)); + 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); @@ -2480,7 +2989,9 @@ Target_sparc<size, big_endian>::Scan::global( 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: @@ -2580,8 +3091,11 @@ void Target_sparc<size, big_endian>::do_finalize_sections( Layout* layout, const Input_objects*, - Symbol_table*) + 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 @@ -2593,6 +3107,47 @@ Target_sparc<size, big_endian>::do_finalize_sections( // 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. @@ -2612,6 +3167,7 @@ Target_sparc<size, big_endian>::Relocate::relocate( 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_) @@ -2629,6 +3185,7 @@ Target_sparc<size, big_endian>::Relocate::relocate( 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; @@ -2637,39 +3194,61 @@ Target_sparc<size, big_endian>::Relocate::relocate( { elfcpp::Elf_Xword value; - value = target->plt_section()->address() + gsym->plt_offset(); + value = target->plt_address_for_global(gsym) + gsym->plt_offset(); 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) + + object->local_plt_offset(r_sym)); + psymval = &symval; + } + } - const Sized_relobj_file<size, big_endian>* object = relinfo->object; 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, 0) - 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); - } + { + 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); - } + { + 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: @@ -2693,7 +3272,7 @@ Target_sparc<size, big_endian>::Relocate::relocate( if (rela.get_r_offset() & 0x1) { // The assembler can sometimes emit unaligned relocations - // for dwarf2 cfi directives. + // for dwarf2 cfi directives. Reloc::ua16(view, object, psymval, addend); } else @@ -2707,7 +3286,7 @@ Target_sparc<size, big_endian>::Relocate::relocate( if (rela.get_r_offset() & 0x3) { // The assembler can sometimes emit unaligned relocations - // for dwarf2 cfi directives. + // for dwarf2 cfi directives. Reloc::ua32(view, object, psymval, addend); } else @@ -2735,6 +3314,8 @@ Target_sparc<size, big_endian>::Relocate::relocate( 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: @@ -2749,6 +3330,10 @@ Target_sparc<size, big_endian>::Relocate::relocate( 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; @@ -2770,14 +3355,37 @@ Target_sparc<size, big_endian>::Relocate::relocate( 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, addend); + 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, addend); + break; + } + /* Fall through. */ case elfcpp::R_SPARC_GOT22: Reloc::hi22(view, got_offset, addend); break; @@ -2831,7 +3439,7 @@ Target_sparc<size, big_endian>::Relocate::relocate( if (rela.get_r_offset() & 0x7) { // The assembler can sometimes emit unaligned relocations - // for dwarf2 cfi directives. + // for dwarf2 cfi directives. Reloc::ua64(view, object, psymval, addend); } else @@ -2900,6 +3508,10 @@ Target_sparc<size, big_endian>::Relocate::relocate( 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; @@ -2947,7 +3559,9 @@ Target_sparc<size, big_endian>::Relocate::relocate( 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: @@ -3039,22 +3653,22 @@ Target_sparc<size, big_endian>::Relocate::relocate_tls( 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) + { + 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; @@ -3119,10 +3733,10 @@ Target_sparc<size, big_endian>::Relocate::relocate_tls( elfcpp::Swap<32, true>::writeval(wv, 0x9001c008); break; } - break; + break; } - else if (optimized_type == tls::TLSOPT_NONE) - { + else if (optimized_type == tls::TLSOPT_NONE) + { switch (r_type) { case elfcpp::R_SPARC_TLS_GD_HI22: @@ -3149,8 +3763,8 @@ Target_sparc<size, big_endian>::Relocate::relocate_tls( break; } break; - } - } + } + } gold_error_at_location(relinfo, relnum, rela.get_r_offset(), _("unsupported reloc %u"), r_type); @@ -3179,10 +3793,10 @@ Target_sparc<size, big_endian>::Relocate::relocate_tls( 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; + { + // 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) @@ -3210,8 +3824,8 @@ Target_sparc<size, big_endian>::Relocate::relocate_tls( } break; } - break; - } + break; + } gold_error_at_location(relinfo, relnum, rela.get_r_offset(), _("unsupported reloc %u"), r_type); @@ -3352,6 +3966,150 @@ Target_sparc<size, big_endian>::Relocate::relocate_tls( } } +// 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> @@ -3486,6 +4244,100 @@ Target_sparc<size, big_endian>::do_dynsym_value(const Symbol* gsym) const 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) const +{ + 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> @@ -3498,7 +4350,8 @@ public: (size == 64 ? "elf64_sparc" : "elf32_sparc")) { } - Target* do_recognize(int machine, int, int) + virtual Target* + do_recognize(Input_file*, off_t, int machine, int, int) { switch (size) { @@ -3520,7 +4373,8 @@ public: return this->instantiate_target(); } - Target* do_instantiate_target() + virtual Target* + do_instantiate_target() { return new Target_sparc<size, big_endian>(); } }; |