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// sparc.cc -- sparc target support for gold. // Copyright 2008, 2009, 2010 Free Software Foundation, Inc. // Written by David S. Miller <davem@davemloft.net>. // This file is part of gold. // This program is free software; you can redistribute it and/or modify // it under the terms of the GNU General Public License as published by // the Free Software Foundation; either version 3 of the License, or // (at your option) any later version. // This program is distributed in the hope that it will be useful, // but WITHOUT ANY WARRANTY; without even the implied warranty of // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the // GNU General Public License for more details. // You should have received a copy of the GNU General Public License // along with this program; if not, write to the Free Software // Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, // MA 02110-1301, USA. #include "gold.h" #include <cstdlib> #include <cstdio> #include <cstring> #include "elfcpp.h" #include "parameters.h" #include "reloc.h" #include "sparc.h" #include "object.h" #include "symtab.h" #include "layout.h" #include "output.h" #include "copy-relocs.h" #include "target.h" #include "target-reloc.h" #include "target-select.h" #include "tls.h" #include "errors.h" #include "gc.h" namespace { using namespace gold; template<int size, bool big_endian> class Output_data_plt_sparc; template<int size, bool big_endian> class Target_sparc : public Sized_target<size, big_endian> { public: typedef Output_data_reloc<elfcpp::SHT_RELA, true, size, big_endian> Reloc_section; Target_sparc() : Sized_target<size, big_endian>(&sparc_info), got_(NULL), plt_(NULL), rela_dyn_(NULL), copy_relocs_(elfcpp::R_SPARC_COPY), dynbss_(NULL), got_mod_index_offset_(-1U), tls_get_addr_sym_(NULL) { } // 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); // Scan the relocations to look for symbol adjustments. void 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); // Finalize the sections. void do_finalize_sections(Layout*, const Input_objects*, Symbol_table*); // Return the value to use for a dynamic which requires special // treatment. uint64_t do_dynsym_value(const Symbol*) const; // Relocate a section. void relocate_section(const Relocate_info<size, big_endian>*, 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 view_address, section_size_type view_size, const Reloc_symbol_changes*); // Scan the relocs during a relocatable link. void 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*); // Relocate a section during a relocatable link. void relocate_for_relocatable(const Relocate_info<size, big_endian>*, 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*, 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); // Return whether SYM is defined by the ABI. bool do_is_defined_by_abi(const Symbol* sym) const { // XXX Really need to support this better... if (sym->type() == elfcpp::STT_SPARC_REGISTER) return 1; return strcmp(sym->name(), "___tls_get_addr") == 0; } // Return whether there is a GOT section. bool has_got_section() const { return this->got_ != NULL; } // Return the size of the GOT section. section_size_type got_size() const { gold_assert(this->got_ != NULL); return this->got_->data_size(); } // Return the number of entries in the GOT. unsigned int got_entry_count() const { if (this->got_ == NULL) return 0; return this->got_size() / (size / 8); } // Return the number of entries in the PLT. unsigned int plt_entry_count() const; // Return the offset of the first non-reserved PLT entry. unsigned int first_plt_entry_offset() const; // Return the size of each PLT entry. unsigned int plt_entry_size() const; private: // The class which scans relocations. class Scan { public: Scan() : issued_non_pic_error_(false) { } static inline int get_reference_flags(unsigned int r_type); inline void local(Symbol_table* symtab, Layout* layout, Target_sparc* 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); inline void global(Symbol_table* symtab, Layout* layout, Target_sparc* 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); 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>& , unsigned int , 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*) { return false; } private: static void unsupported_reloc_local(Sized_relobj_file<size, big_endian>*, unsigned int r_type); static void unsupported_reloc_global(Sized_relobj_file<size, big_endian>*, unsigned int r_type, Symbol*); static void generate_tls_call(Symbol_table* symtab, Layout* layout, Target_sparc* target); void check_non_pic(Relobj*, unsigned int r_type); // Whether we have issued an error about a non-PIC compilation. bool issued_non_pic_error_; }; // The class which implements relocation. class Relocate { public: Relocate() : ignore_gd_add_(false) { } ~Relocate() { if (this->ignore_gd_add_) { // FIXME: This needs to specify the location somehow. gold_error(_("missing expected TLS relocation")); } } // Do a relocation. Return false if the caller should not issue // any warnings about this relocation. inline bool relocate(const Relocate_info<size, big_endian>*, Target_sparc*, Output_section*, 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); private: // 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>&, unsigned int r_type, const Sized_symbol<size>*, const Symbol_value<size>*, unsigned char*, typename elfcpp::Elf_types<size>::Elf_Addr, section_size_type); // Ignore the next relocation which should be R_SPARC_TLS_GD_ADD bool ignore_gd_add_; }; // A class which returns the size required for a relocation type, // used while scanning relocs during a relocatable link. class Relocatable_size_for_reloc { public: unsigned int get_size_for_reloc(unsigned int, Relobj*); }; // Get the GOT section, creating it if necessary. Output_data_got<size, big_endian>* got_section(Symbol_table*, Layout*); // Create a PLT entry for a global symbol. void make_plt_entry(Symbol_table*, Layout*, Symbol*); // Create a GOT entry for the TLS module index. unsigned int got_mod_index_entry(Symbol_table* symtab, Layout* layout, Sized_relobj_file<size, big_endian>* object); // Return the gsym for "__tls_get_addr". Cache if not already // cached. Symbol* tls_get_addr_sym(Symbol_table* symtab) { if (!this->tls_get_addr_sym_) this->tls_get_addr_sym_ = symtab->lookup("__tls_get_addr", NULL); gold_assert(this->tls_get_addr_sym_); return this->tls_get_addr_sym_; } // Get the PLT section. const Output_data_plt_sparc<size, big_endian>* plt_section() const { gold_assert(this->plt_ != NULL); return this->plt_; } // Get the dynamic reloc section, creating it if necessary. Reloc_section* rela_dyn_section(Layout*); // Copy a relocation against a global symbol. void copy_reloc(Symbol_table* symtab, Layout* layout, Sized_relobj_file<size, big_endian>* object, unsigned int shndx, Output_section* output_section, Symbol* sym, const elfcpp::Rela<size, big_endian>& reloc) { this->copy_relocs_.copy_reloc(symtab, layout, symtab->get_sized_symbol<size>(sym), object, shndx, output_section, reloc, this->rela_dyn_section(layout)); } // Information about this specific target which we pass to the // general Target structure. static Target::Target_info sparc_info; // The types of GOT entries needed for this platform. // These values are exposed to the ABI in an incremental link. // Do not renumber existing values without changing the version // number of the .gnu_incremental_inputs section. enum Got_type { GOT_TYPE_STANDARD = 0, // GOT entry for a regular symbol GOT_TYPE_TLS_OFFSET = 1, // GOT entry for TLS offset GOT_TYPE_TLS_PAIR = 2, // GOT entry for TLS module/offset pair }; // The GOT section. Output_data_got<size, big_endian>* got_; // The PLT section. Output_data_plt_sparc<size, big_endian>* plt_; // The dynamic reloc section. Reloc_section* rela_dyn_; // 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. Output_data_space* dynbss_; // Offset of the GOT entry for the TLS module index; unsigned int got_mod_index_offset_; // Cached pointer to __tls_get_addr symbol Symbol* tls_get_addr_sym_; }; template<> Target::Target_info Target_sparc<32, true>::sparc_info = { 32, // size true, // is_big_endian elfcpp::EM_SPARC, // machine_code false, // has_make_symbol false, // has_resolve false, // has_code_fill true, // is_default_stack_executable '\0', // wrap_char "/usr/lib/ld.so.1", // dynamic_linker 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) elfcpp::SHN_UNDEF, // small_common_shndx elfcpp::SHN_UNDEF, // large_common_shndx 0, // small_common_section_flags 0, // large_common_section_flags NULL, // attributes_section NULL // attributes_vendor }; template<> Target::Target_info Target_sparc<64, true>::sparc_info = { 64, // size true, // is_big_endian elfcpp::EM_SPARCV9, // machine_code false, // has_make_symbol false, // has_resolve false, // has_code_fill true, // is_default_stack_executable '\0', // wrap_char "/usr/lib/sparcv9/ld.so.1", // dynamic_linker 0x100000, // default_text_segment_address 64 * 1024, // abi_pagesize (overridable by -z max-page-size) 8 * 1024, // common_pagesize (overridable by -z common-page-size) elfcpp::SHN_UNDEF, // small_common_shndx elfcpp::SHN_UNDEF, // large_common_shndx 0, // small_common_section_flags 0, // large_common_section_flags NULL, // attributes_section NULL // attributes_vendor }; // We have to take care here, even when operating in little-endian // mode, sparc instructions are still big endian. template<int size, bool big_endian> class Sparc_relocate_functions { private: // Do a simple relocation with the addend in the relocation. template<int valsize> static inline void rela(unsigned char* view, unsigned int right_shift, typename elfcpp::Elf_types<valsize>::Elf_Addr dst_mask, typename elfcpp::Swap<size, big_endian>::Valtype value, typename elfcpp::Swap<size, big_endian>::Valtype addend) { typedef typename elfcpp::Swap<valsize, big_endian>::Valtype Valtype; Valtype* wv = reinterpret_cast<Valtype*>(view); Valtype val = elfcpp::Swap<valsize, big_endian>::readval(wv); Valtype reloc = ((value + addend) >> right_shift); val &= ~dst_mask; reloc &= dst_mask; elfcpp::Swap<valsize, big_endian>::writeval(wv, val | reloc); } // Do a simple relocation using a symbol value with the addend in // the relocation. template<int valsize> static inline void rela(unsigned char* view, unsigned int right_shift, typename elfcpp::Elf_types<valsize>::Elf_Addr dst_mask, const Sized_relobj_file<size, big_endian>* object, const Symbol_value<size>* psymval, typename elfcpp::Swap<valsize, big_endian>::Valtype addend) { typedef typename elfcpp::Swap<valsize, big_endian>::Valtype Valtype; Valtype* wv = reinterpret_cast<Valtype*>(view); Valtype val = elfcpp::Swap<valsize, big_endian>::readval(wv); Valtype reloc = (psymval->value(object, addend) >> right_shift); val &= ~dst_mask; reloc &= dst_mask; elfcpp::Swap<valsize, big_endian>::writeval(wv, val | reloc); } // Do a simple relocation using a symbol value with the addend in // the relocation, unaligned. template<int valsize> static inline void rela_ua(unsigned char* view, unsigned int right_shift, elfcpp::Elf_Xword dst_mask, const Sized_relobj_file<size, big_endian>* object, const Symbol_value<size>* psymval, typename elfcpp::Swap<size, big_endian>::Valtype addend) { typedef typename elfcpp::Swap_unaligned<valsize, big_endian>::Valtype Valtype; unsigned char* wv = view; Valtype val = elfcpp::Swap_unaligned<valsize, big_endian>::readval(wv); Valtype reloc = (psymval->value(object, addend) >> right_shift); val &= ~dst_mask; reloc &= dst_mask; elfcpp::Swap_unaligned<valsize, big_endian>::writeval(wv, val | reloc); } // Do a simple PC relative relocation with a Symbol_value with the // addend in the relocation. template<int valsize> static inline void pcrela(unsigned char* view, unsigned int right_shift, typename elfcpp::Elf_types<valsize>::Elf_Addr dst_mask, const Sized_relobj_file<size, big_endian>* object, const Symbol_value<size>* psymval, typename elfcpp::Swap<size, big_endian>::Valtype addend, typename elfcpp::Elf_types<size>::Elf_Addr address) { typedef typename elfcpp::Swap<valsize, big_endian>::Valtype Valtype; Valtype* wv = reinterpret_cast<Valtype*>(view); Valtype val = elfcpp::Swap<valsize, big_endian>::readval(wv); Valtype reloc = ((psymval->value(object, addend) - address) >> right_shift); val &= ~dst_mask; reloc &= dst_mask; elfcpp::Swap<valsize, big_endian>::writeval(wv, val | reloc); } template<int valsize> static inline void pcrela_unaligned(unsigned char* view, const Sized_relobj_file<size, big_endian>* object, const Symbol_value<size>* psymval, typename elfcpp::Swap<size, big_endian>::Valtype addend, typename elfcpp::Elf_types<size>::Elf_Addr address) { typedef typename elfcpp::Swap_unaligned<valsize, big_endian>::Valtype Valtype; unsigned char* wv = view; Valtype reloc = (psymval->value(object, addend) - address); elfcpp::Swap_unaligned<valsize, big_endian>::writeval(wv, reloc); } typedef Sparc_relocate_functions<size, big_endian> This; typedef Sparc_relocate_functions<size, true> This_insn; public: // R_SPARC_WDISP30: (Symbol + Addend - Address) >> 2 static inline void wdisp30(unsigned char* view, const Sized_relobj_file<size, big_endian>* object, const Symbol_value<size>* psymval, typename elfcpp::Elf_types<size>::Elf_Addr addend, typename elfcpp::Elf_types<size>::Elf_Addr address) { This_insn::template pcrela<32>(view, 2, 0x3fffffff, object, psymval, addend, address); } // R_SPARC_WDISP22: (Symbol + Addend - Address) >> 2 static inline void wdisp22(unsigned char* view, const Sized_relobj_file<size, big_endian>* object, const Symbol_value<size>* psymval, typename elfcpp::Elf_types<size>::Elf_Addr addend, typename elfcpp::Elf_types<size>::Elf_Addr address) { This_insn::template pcrela<32>(view, 2, 0x003fffff, object, psymval, addend, address); } // R_SPARC_WDISP19: (Symbol + Addend - Address) >> 2 static inline void wdisp19(unsigned char* view, const Sized_relobj_file<size, big_endian>* object, const Symbol_value<size>* psymval, typename elfcpp::Elf_types<size>::Elf_Addr addend, typename elfcpp::Elf_types<size>::Elf_Addr address) { This_insn::template pcrela<32>(view, 2, 0x0007ffff, object, psymval, addend, address); } // R_SPARC_WDISP16: (Symbol + Addend - Address) >> 2 static inline void wdisp16(unsigned char* view, const Sized_relobj_file<size, big_endian>* object, const Symbol_value<size>* psymval, typename elfcpp::Elf_types<size>::Elf_Addr addend, typename elfcpp::Elf_types<size>::Elf_Addr address) { typedef typename elfcpp::Swap<32, true>::Valtype Valtype; Valtype* wv = reinterpret_cast<Valtype*>(view); Valtype val = elfcpp::Swap<32, true>::readval(wv); Valtype reloc = ((psymval->value(object, addend) - address) >> 2); // The relocation value is split between the low 14 bits, // and bits 20-21. val &= ~((0x3 << 20) | 0x3fff); reloc = (((reloc & 0xc000) << (20 - 14)) | (reloc & 0x3ffff)); elfcpp::Swap<32, true>::writeval(wv, val | reloc); } // R_SPARC_PC22: (Symbol + Addend - Address) >> 10 static inline void pc22(unsigned char* view, const Sized_relobj_file<size, big_endian>* object, const Symbol_value<size>* psymval, typename elfcpp::Elf_types<size>::Elf_Addr addend, typename elfcpp::Elf_types<size>::Elf_Addr address) { This_insn::template pcrela<32>(view, 10, 0x003fffff, object, psymval, addend, address); } // R_SPARC_PC10: (Symbol + Addend - Address) & 0x3ff static inline void pc10(unsigned char* view, const Sized_relobj_file<size, big_endian>* object, const Symbol_value<size>* psymval, typename elfcpp::Elf_types<size>::Elf_Addr addend, typename elfcpp::Elf_types<size>::Elf_Addr address) { This_insn::template pcrela<32>(view, 0, 0x000003ff, object, psymval, addend, address); } // R_SPARC_HI22: (Symbol + Addend) >> 10 static inline void hi22(unsigned char* view, typename elfcpp::Elf_types<size>::Elf_Addr value, typename elfcpp::Elf_types<size>::Elf_Addr addend) { This_insn::template rela<32>(view, 10, 0x003fffff, value, addend); } // R_SPARC_HI22: (Symbol + Addend) >> 10 static inline void hi22(unsigned char* view, const Sized_relobj_file<size, big_endian>* object, const Symbol_value<size>* psymval, typename elfcpp::Elf_types<size>::Elf_Addr addend) { This_insn::template rela<32>(view, 10, 0x003fffff, object, psymval, addend); } // R_SPARC_PCPLT22: (Symbol + Addend - Address) >> 10 static inline void pcplt22(unsigned char* view, const Sized_relobj_file<size, big_endian>* object, const Symbol_value<size>* psymval, typename elfcpp::Elf_types<size>::Elf_Addr addend, typename elfcpp::Elf_types<size>::Elf_Addr address) { This_insn::template pcrela<32>(view, 10, 0x003fffff, object, psymval, addend, address); } // R_SPARC_LO10: (Symbol + Addend) & 0x3ff static inline void lo10(unsigned char* view, typename elfcpp::Elf_types<size>::Elf_Addr value, typename elfcpp::Elf_types<size>::Elf_Addr addend) { This_insn::template rela<32>(view, 0, 0x000003ff, value, addend); } // R_SPARC_LO10: (Symbol + Addend) & 0x3ff static inline void lo10(unsigned char* view, const Sized_relobj_file<size, big_endian>* object, const Symbol_value<size>* psymval, typename elfcpp::Elf_types<size>::Elf_Addr addend) { This_insn::template rela<32>(view, 0, 0x000003ff, object, psymval, addend); } // R_SPARC_LO10: (Symbol + Addend) & 0x3ff static inline void lo10(unsigned char* view, const Sized_relobj_file<size, big_endian>* object, const Symbol_value<size>* psymval, typename elfcpp::Elf_types<size>::Elf_Addr addend, typename elfcpp::Elf_types<size>::Elf_Addr address) { This_insn::template pcrela<32>(view, 0, 0x000003ff, object, psymval, addend, address); } // R_SPARC_OLO10: ((Symbol + Addend) & 0x3ff) + Addend2 static inline void olo10(unsigned char* view, const Sized_relobj_file<size, big_endian>* object, const Symbol_value<size>* psymval, typename elfcpp::Elf_types<size>::Elf_Addr addend, typename elfcpp::Elf_types<size>::Elf_Addr addend2) { typedef typename elfcpp::Swap<32, true>::Valtype Valtype; Valtype* wv = reinterpret_cast<Valtype*>(view); Valtype val = elfcpp::Swap<32, true>::readval(wv); Valtype reloc = psymval->value(object, addend); val &= ~0x1fff; reloc &= 0x3ff; reloc += addend2; reloc &= 0x1fff; elfcpp::Swap<32, true>::writeval(wv, val | reloc); } // R_SPARC_22: (Symbol + Addend) static inline void rela32_22(unsigned char* view, const Sized_relobj_file<size, big_endian>* object, const Symbol_value<size>* psymval, typename elfcpp::Elf_types<size>::Elf_Addr addend) { This_insn::template rela<32>(view, 0, 0x003fffff, object, psymval, addend); } // R_SPARC_13: (Symbol + Addend) static inline void rela32_13(unsigned char* view, typename elfcpp::Elf_types<size>::Elf_Addr value, typename elfcpp::Elf_types<size>::Elf_Addr addend) { This_insn::template rela<32>(view, 0, 0x00001fff, value, addend); } // R_SPARC_13: (Symbol + Addend) static inline void rela32_13(unsigned char* view, const Sized_relobj_file<size, big_endian>* object, const Symbol_value<size>* psymval, typename elfcpp::Elf_types<size>::Elf_Addr addend) { This_insn::template rela<32>(view, 0, 0x00001fff, object, psymval, addend); } // R_SPARC_UA16: (Symbol + Addend) static inline void ua16(unsigned char* view, const Sized_relobj_file<size, big_endian>* object, const Symbol_value<size>* psymval, typename elfcpp::Elf_types<size>::Elf_Addr addend) { This::template rela_ua<16>(view, 0, 0xffff, object, psymval, addend); } // R_SPARC_UA32: (Symbol + Addend) static inline void ua32(unsigned char* view, const Sized_relobj_file<size, big_endian>* object, const Symbol_value<size>* psymval, typename elfcpp::Elf_types<size>::Elf_Addr addend) { This::template rela_ua<32>(view, 0, 0xffffffff, object, psymval, addend); } // R_SPARC_UA64: (Symbol + Addend) static inline void ua64(unsigned char* view, const Sized_relobj_file<size, big_endian>* object, const Symbol_value<size>* psymval, typename elfcpp::Elf_types<size>::Elf_Addr addend) { This::template rela_ua<64>(view, 0, ~(elfcpp::Elf_Xword) 0, object, psymval, addend); } // R_SPARC_DISP8: (Symbol + Addend - Address) static inline void disp8(unsigned char* view, const Sized_relobj_file<size, big_endian>* object, const Symbol_value<size>* psymval, typename elfcpp::Elf_types<size>::Elf_Addr addend, typename elfcpp::Elf_types<size>::Elf_Addr address) { This::template pcrela_unaligned<8>(view, object, psymval, addend, address); } // R_SPARC_DISP16: (Symbol + Addend - Address) static inline void disp16(unsigned char* view, const Sized_relobj_file<size, big_endian>* object, const Symbol_value<size>* psymval, typename elfcpp::Elf_types<size>::Elf_Addr addend, typename elfcpp::Elf_types<size>::Elf_Addr address) { This::template pcrela_unaligned<16>(view, object, psymval, addend, address); } // R_SPARC_DISP32: (Symbol + Addend - Address) static inline void disp32(unsigned char* view, const Sized_relobj_file<size, big_endian>* object, const Symbol_value<size>* psymval, typename elfcpp::Elf_types<size>::Elf_Addr addend, typename elfcpp::Elf_types<size>::Elf_Addr address) { This::template pcrela_unaligned<32>(view, object, psymval, addend, address); } // R_SPARC_DISP64: (Symbol + Addend - Address) static inline void disp64(unsigned char* view, const Sized_relobj_file<size, big_endian>* object, const Symbol_value<size>* psymval, elfcpp::Elf_Xword addend, typename elfcpp::Elf_types<size>::Elf_Addr address) { This::template pcrela_unaligned<64>(view, object, psymval, addend, address); } // R_SPARC_H44: (Symbol + Addend) >> 22 static inline void h44(unsigned char* view, const Sized_relobj_file<size, big_endian>* object, const Symbol_value<size>* psymval, typename elfcpp::Elf_types<size>::Elf_Addr addend) { This_insn::template rela<32>(view, 22, 0x003fffff, object, psymval, addend); } // R_SPARC_M44: ((Symbol + Addend) >> 12) & 0x3ff static inline void m44(unsigned char* view, const Sized_relobj_file<size, big_endian>* object, const Symbol_value<size>* psymval, typename elfcpp::Elf_types<size>::Elf_Addr addend) { This_insn::template rela<32>(view, 12, 0x000003ff, object, psymval, addend); } // R_SPARC_L44: (Symbol + Addend) & 0xfff static inline void l44(unsigned char* view, const Sized_relobj_file<size, big_endian>* object, const Symbol_value<size>* psymval, typename elfcpp::Elf_types<size>::Elf_Addr addend) { This_insn::template rela<32>(view, 0, 0x00000fff, object, psymval, addend); } // R_SPARC_HH22: (Symbol + Addend) >> 42 static inline void hh22(unsigned char* view, const Sized_relobj_file<size, big_endian>* object, const Symbol_value<size>* psymval, typename elfcpp::Elf_types<size>::Elf_Addr addend) { This_insn::template rela<32>(view, 42, 0x003fffff, object, psymval, addend); } // R_SPARC_PC_HH22: (Symbol + Addend - Address) >> 42 static inline void pc_hh22(unsigned char* view, const Sized_relobj_file<size, big_endian>* object, const Symbol_value<size>* psymval, typename elfcpp::Elf_types<size>::Elf_Addr addend, typename elfcpp::Elf_types<size>::Elf_Addr address) { This_insn::template pcrela<32>(view, 42, 0x003fffff, object, psymval, addend, address); } // R_SPARC_HM10: ((Symbol + Addend) >> 32) & 0x3ff static inline void hm10(unsigned char* view, const Sized_relobj_file<size, big_endian>* object, const Symbol_value<size>* psymval, typename elfcpp::Elf_types<size>::Elf_Addr addend) { This_insn::template rela<32>(view, 32, 0x000003ff, object, psymval, addend); } // R_SPARC_PC_HM10: ((Symbol + Addend - Address) >> 32) & 0x3ff static inline void pc_hm10(unsigned char* view, const Sized_relobj_file<size, big_endian>* object, const Symbol_value<size>* psymval, typename elfcpp::Elf_types<size>::Elf_Addr addend, typename elfcpp::Elf_types<size>::Elf_Addr address) { This_insn::template pcrela<32>(view, 32, 0x000003ff, object, psymval, addend, address); } // R_SPARC_11: (Symbol + Addend) static inline void rela32_11(unsigned char* view, const Sized_relobj_file<size, big_endian>* object, const Symbol_value<size>* psymval, typename elfcpp::Elf_types<size>::Elf_Addr addend) { This_insn::template rela<32>(view, 0, 0x000007ff, object, psymval, addend); } // R_SPARC_10: (Symbol + Addend) static inline void rela32_10(unsigned char* view, const Sized_relobj_file<size, big_endian>* object, const Symbol_value<size>* psymval, typename elfcpp::Elf_types<size>::Elf_Addr addend) { This_insn::template rela<32>(view, 0, 0x000003ff, object, psymval, addend); } // R_SPARC_7: (Symbol + Addend) static inline void rela32_7(unsigned char* view, const Sized_relobj_file<size, big_endian>* object, const Symbol_value<size>* psymval, typename elfcpp::Elf_types<size>::Elf_Addr addend) { This_insn::template rela<32>(view, 0, 0x0000007f, object, psymval, addend); } // R_SPARC_6: (Symbol + Addend) static inline void rela32_6(unsigned char* view, const Sized_relobj_file<size, big_endian>* object, const Symbol_value<size>* psymval, typename elfcpp::Elf_types<size>::Elf_Addr addend) { This_insn::template rela<32>(view, 0, 0x0000003f, object, psymval, addend); } // R_SPARC_5: (Symbol + Addend) static inline void rela32_5(unsigned char* view, const Sized_relobj_file<size, big_endian>* object, const Symbol_value<size>* psymval, typename elfcpp::Elf_types<size>::Elf_Addr addend) { This_insn::template rela<32>(view, 0, 0x0000001f, object, psymval, addend); } // R_SPARC_TLS_LDO_HIX22: @dtpoff(Symbol + Addend) >> 10 static inline void ldo_hix22(unsigned char* view, typename elfcpp::Elf_types<size>::Elf_Addr value, typename elfcpp::Elf_types<size>::Elf_Addr addend) { This_insn::hi22(view, value, addend); } // R_SPARC_TLS_LDO_LOX10: @dtpoff(Symbol + Addend) & 0x3ff static inline void ldo_lox10(unsigned char* view, typename elfcpp::Elf_types<size>::Elf_Addr value, typename elfcpp::Elf_types<size>::Elf_Addr addend) { typedef typename elfcpp::Swap<32, true>::Valtype Valtype; Valtype* wv = reinterpret_cast<Valtype*>(view); Valtype val = elfcpp::Swap<32, true>::readval(wv); Valtype reloc = (value + addend); val &= ~0x1fff; reloc &= 0x3ff; elfcpp::Swap<32, true>::writeval(wv, val | reloc); } // R_SPARC_TLS_LE_HIX22: (@tpoff(Symbol + Addend) ^ 0xffffffffffffffff) >> 10 static inline void hix22(unsigned char* view, typename elfcpp::Elf_types<size>::Elf_Addr value, typename elfcpp::Elf_types<size>::Elf_Addr addend) { typedef typename elfcpp::Swap<32, true>::Valtype Valtype; Valtype* wv = reinterpret_cast<Valtype*>(view); Valtype val = elfcpp::Swap<32, true>::readval(wv); Valtype reloc = (value + addend); val &= ~0x3fffff; reloc ^= ~(Valtype)0; reloc >>= 10; reloc &= 0x3fffff; elfcpp::Swap<32, true>::writeval(wv, val | reloc); } // R_SPARC_HIX22: ((Symbol + Addend) ^ 0xffffffffffffffff) >> 10 static inline void hix22(unsigned char* view, const Sized_relobj_file<size, big_endian>* object, const Symbol_value<size>* psymval, typename elfcpp::Elf_types<size>::Elf_Addr addend) { typedef typename elfcpp::Swap<32, true>::Valtype Valtype; Valtype* wv = reinterpret_cast<Valtype*>(view); Valtype val = elfcpp::Swap<32, true>::readval(wv); Valtype reloc = psymval->value(object, addend); val &= ~0x3fffff; reloc ^= ~(Valtype)0; reloc >>= 10; reloc &= 0x3fffff; elfcpp::Swap<32, true>::writeval(wv, val | reloc); } // R_SPARC_TLS_LE_LOX10: (@tpoff(Symbol + Addend) & 0x3ff) | 0x1c00 static inline void lox10(unsigned char* view, typename elfcpp::Elf_types<size>::Elf_Addr value, typename elfcpp::Elf_types<size>::Elf_Addr addend) { typedef typename elfcpp::Swap<32, true>::Valtype Valtype; Valtype* wv = reinterpret_cast<Valtype*>(view); Valtype val = elfcpp::Swap<32, true>::readval(wv); Valtype reloc = (value + addend); val &= ~0x1fff; reloc &= 0x3ff; reloc |= 0x1c00; elfcpp::Swap<32, true>::writeval(wv, val | reloc); } // R_SPARC_LOX10: ((Symbol + Addend) & 0x3ff) | 0x1c00 static inline void lox10(unsigned char* view, const Sized_relobj_file<size, big_endian>* object, const Symbol_value<size>* psymval, typename elfcpp::Elf_types<size>::Elf_Addr addend) { typedef typename elfcpp::Swap<32, true>::Valtype Valtype; Valtype* wv = reinterpret_cast<Valtype*>(view); Valtype val = elfcpp::Swap<32, true>::readval(wv); Valtype reloc = psymval->value(object, addend); val &= ~0x1fff; reloc &= 0x3ff; reloc |= 0x1c00; elfcpp::Swap<32, true>::writeval(wv, val | reloc); } }; // Get the GOT section, creating it if necessary. template<int size, bool big_endian> Output_data_got<size, big_endian>* Target_sparc<size, big_endian>::got_section(Symbol_table* symtab, Layout* layout) { if (this->got_ == NULL) { gold_assert(symtab != NULL && layout != NULL); this->got_ = new Output_data_got<size, big_endian>(); layout->add_output_section_data(".got", elfcpp::SHT_PROGBITS, (elfcpp::SHF_ALLOC | elfcpp::SHF_WRITE), this->got_, ORDER_RELRO, true); // Define _GLOBAL_OFFSET_TABLE_ at the start of the .got section. symtab->define_in_output_data("_GLOBAL_OFFSET_TABLE_", NULL, Symbol_table::PREDEFINED, this->got_, 0, 0, elfcpp::STT_OBJECT, elfcpp::STB_LOCAL, elfcpp::STV_HIDDEN, 0, false, false); } return this->got_; } // Get the dynamic reloc section, creating it if necessary. template<int size, bool big_endian> typename Target_sparc<size, big_endian>::Reloc_section* Target_sparc<size, big_endian>::rela_dyn_section(Layout* layout) { if (this->rela_dyn_ == NULL) { gold_assert(layout != NULL); this->rela_dyn_ = new Reloc_section(parameters->options().combreloc()); layout->add_output_section_data(".rela.dyn", elfcpp::SHT_RELA, elfcpp::SHF_ALLOC, this->rela_dyn_, ORDER_DYNAMIC_RELOCS, false); } return this->rela_dyn_; } // A class to handle the PLT data. template<int size, bool big_endian> class Output_data_plt_sparc : public Output_section_data { public: typedef Output_data_reloc<elfcpp::SHT_RELA, true, size, big_endian> Reloc_section; Output_data_plt_sparc(Layout*); // Add an entry to the PLT. void add_entry(Symbol* 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); // Write to a map file. void do_print_to_mapfile(Mapfile* mapfile) const { mapfile->print_output_data(this, _("** PLT")); } private: // The size of an entry in the PLT. static const int base_plt_entry_size = (size == 32 ? 12 : 32); static const unsigned int plt_entries_per_block = 160; static const unsigned int plt_insn_chunk_size = 24; static const unsigned int plt_pointer_chunk_size = 8; static const unsigned int plt_block_size = (plt_entries_per_block * (plt_insn_chunk_size + plt_pointer_chunk_size)); // Set the final size. void set_final_data_size() { unsigned int full_count = this->count_ + 4; unsigned int extra = (size == 32 ? 4 : 0); if (size == 32 || full_count < 32768) this->set_data_size((full_count * base_plt_entry_size) + extra); else { unsigned int ext_cnt = full_count - 32768; this->set_data_size((32768 * base_plt_entry_size) + (ext_cnt * (plt_insn_chunk_size + plt_pointer_chunk_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_; }; // Define the constants as required by C++ standard. template<int size, bool big_endian> const int Output_data_plt_sparc<size, big_endian>::base_plt_entry_size; template<int size, bool big_endian> const unsigned int Output_data_plt_sparc<size, big_endian>::plt_entries_per_block; template<int size, bool big_endian> const unsigned int Output_data_plt_sparc<size, big_endian>::plt_insn_chunk_size; template<int size, bool big_endian> const unsigned int Output_data_plt_sparc<size, big_endian>::plt_pointer_chunk_size; template<int size, bool big_endian> const unsigned int Output_data_plt_sparc<size, big_endian>::plt_block_size; // Create the PLT section. The ordinary .got section is an argument, // since we need to refer to the start. template<int size, bool big_endian> Output_data_plt_sparc<size, big_endian>::Output_data_plt_sparc(Layout* layout) : Output_section_data(size == 32 ? 4 : 8), 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_sparc<size, big_endian>::do_adjust_output_section(Output_section* os) { os->set_entsize(0); } // Add an entry to the PLT. template<int size, bool big_endian> void Output_data_plt_sparc<size, big_endian>::add_entry(Symbol* gsym) { gold_assert(!gsym->has_plt_offset()); unsigned int index = this->count_ + 4; section_offset_type plt_offset; if (size == 32 || index < 32768) plt_offset = index * base_plt_entry_size; else { unsigned int ext_index = index - 32768; 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); } gsym->set_plt_offset(plt_offset); ++this->count_; // 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); // 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. } static const unsigned int sparc_nop = 0x01000000; static const unsigned int sparc_sethi_g1 = 0x03000000; static const unsigned int sparc_branch_always = 0x30800000; static const unsigned int sparc_branch_always_pt = 0x30680000; static const unsigned int sparc_mov = 0x80100000; static const unsigned int sparc_mov_g0_o0 = 0x90100000; static const unsigned int sparc_mov_o7_g5 = 0x8a10000f; static const unsigned int sparc_call_plus_8 = 0x40000002; static const unsigned int sparc_ldx_o7_imm_g1 = 0xc25be000; static const unsigned int sparc_jmpl_o7_g1_g1 = 0x83c3c001; static const unsigned int sparc_mov_g5_o7 = 0x9e100005; // Write out the PLT. template<int size, bool big_endian> void Output_data_plt_sparc<size, big_endian>::do_write(Output_file* of) { const off_t offset = this->offset(); const section_size_type oview_size = convert_to_section_size_type(this->data_size()); unsigned char* const oview = of->get_output_view(offset, oview_size); unsigned char* pov = oview; memset(pov, 0, base_plt_entry_size * 4); pov += base_plt_entry_size * 4; unsigned int plt_offset = base_plt_entry_size * 4; const unsigned int count = this->count_; if (size == 64) { unsigned int limit; limit = (count > 32768 ? 32768 : count); for (unsigned int i = 0; i < limit; ++i) { elfcpp::Swap<32, true>::writeval(pov + 0x00, sparc_sethi_g1 + plt_offset); elfcpp::Swap<32, true>::writeval(pov + 0x04, sparc_branch_always_pt + (((base_plt_entry_size - (plt_offset + 4)) >> 2) & 0x7ffff)); elfcpp::Swap<32, true>::writeval(pov + 0x08, sparc_nop); elfcpp::Swap<32, true>::writeval(pov + 0x0c, sparc_nop); elfcpp::Swap<32, true>::writeval(pov + 0x10, sparc_nop); elfcpp::Swap<32, true>::writeval(pov + 0x14, sparc_nop); elfcpp::Swap<32, true>::writeval(pov + 0x18, sparc_nop); elfcpp::Swap<32, true>::writeval(pov + 0x1c, sparc_nop); pov += base_plt_entry_size; plt_offset += base_plt_entry_size; } if (count > 32768) { unsigned int ext_cnt = count - 32768; unsigned int blks = ext_cnt / plt_entries_per_block; for (unsigned int i = 0; i < blks; ++i) { unsigned int data_off = (plt_entries_per_block * plt_insn_chunk_size) - 4; for (unsigned int j = 0; j < plt_entries_per_block; ++j) { elfcpp::Swap<32, true>::writeval(pov + 0x00, sparc_mov_o7_g5); elfcpp::Swap<32, true>::writeval(pov + 0x04, sparc_call_plus_8); elfcpp::Swap<32, true>::writeval(pov + 0x08, sparc_nop); elfcpp::Swap<32, true>::writeval(pov + 0x0c, sparc_ldx_o7_imm_g1 + (data_off & 0x1fff)); elfcpp::Swap<32, true>::writeval(pov + 0x10, sparc_jmpl_o7_g1_g1); elfcpp::Swap<32, true>::writeval(pov + 0x14, sparc_mov_g5_o7); elfcpp::Swap<64, big_endian>::writeval( pov + 0x4 + data_off, (elfcpp::Elf_Xword) (oview - (pov + 0x04))); pov += plt_insn_chunk_size; data_off -= 16; } } unsigned int sub_blk_cnt = ext_cnt % plt_entries_per_block; for (unsigned int i = 0; i < sub_blk_cnt; ++i) { unsigned int data_off = (sub_blk_cnt * plt_insn_chunk_size) - 4; for (unsigned int j = 0; j < plt_entries_per_block; ++j) { elfcpp::Swap<32, true>::writeval(pov + 0x00, sparc_mov_o7_g5); elfcpp::Swap<32, true>::writeval(pov + 0x04, sparc_call_plus_8); elfcpp::Swap<32, true>::writeval(pov + 0x08, sparc_nop); elfcpp::Swap<32, true>::writeval(pov + 0x0c, sparc_ldx_o7_imm_g1 + (data_off & 0x1fff)); elfcpp::Swap<32, true>::writeval(pov + 0x10, sparc_jmpl_o7_g1_g1); elfcpp::Swap<32, true>::writeval(pov + 0x14, sparc_mov_g5_o7); elfcpp::Swap<64, big_endian>::writeval( pov + 0x4 + data_off, (elfcpp::Elf_Xword) (oview - (pov + 0x04))); pov += plt_insn_chunk_size; data_off -= 16; } } } } else { for (unsigned int i = 0; i < count; ++i) { elfcpp::Swap<32, true>::writeval(pov + 0x00, sparc_sethi_g1 + plt_offset); elfcpp::Swap<32, true>::writeval(pov + 0x04, sparc_branch_always + (((- (plt_offset + 4)) >> 2) & 0x003fffff)); elfcpp::Swap<32, true>::writeval(pov + 0x08, sparc_nop); pov += base_plt_entry_size; plt_offset += base_plt_entry_size; } elfcpp::Swap<32, true>::writeval(pov, sparc_nop); pov += 4; } gold_assert(static_cast<section_size_type>(pov - oview) == oview_size); of->write_output_view(offset, oview_size, oview); } // Create a PLT entry for a global symbol. template<int size, bool big_endian> void Target_sparc<size, big_endian>::make_plt_entry(Symbol_table* symtab, Layout* layout, Symbol* gsym) { if (gsym->has_plt_offset()) return; if (this->plt_ == NULL) { // 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_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_sparc<size, big_endian>::plt_entry_count() const { if (this->plt_ == NULL) return 0; return this->plt_->entry_count(); } // Return the offset of the first non-reserved PLT entry. template<int size, bool big_endian> unsigned int Target_sparc<size, big_endian>::first_plt_entry_offset() const { return Output_data_plt_sparc<size, big_endian>::first_plt_entry_offset(); } // Return the size of each PLT entry. template<int size, bool big_endian> unsigned int Target_sparc<size, big_endian>::plt_entry_size() const { return Output_data_plt_sparc<size, big_endian>::get_plt_entry_size(); } // Create a GOT entry for the TLS module index. template<int size, bool big_endian> unsigned int Target_sparc<size, big_endian>::got_mod_index_entry( Symbol_table* symtab, Layout* layout, Sized_relobj_file<size, big_endian>* object) { if (this->got_mod_index_offset_ == -1U) { gold_assert(symtab != NULL && layout != NULL && object != NULL); Reloc_section* rela_dyn = this->rela_dyn_section(layout); Output_data_got<size, big_endian>* got; unsigned int got_offset; got = this->got_section(symtab, layout); got_offset = got->add_constant(0); rela_dyn->add_local(object, 0, (size == 64 ? elfcpp::R_SPARC_TLS_DTPMOD64 : elfcpp::R_SPARC_TLS_DTPMOD32), got, got_offset, 0); got->add_constant(0); this->got_mod_index_offset_ = got_offset; } return this->got_mod_index_offset_; } // Optimize the TLS relocation type based on what we know about the // symbol. IS_FINAL is true if the final address of this symbol is // known at link time. static tls::Tls_optimization optimize_tls_reloc(bool is_final, int r_type) { // If we are generating a shared library, then we can't do anything // in the linker. if (parameters->options().shared()) return tls::TLSOPT_NONE; switch (r_type) { case elfcpp::R_SPARC_TLS_GD_HI22: // Global-dynamic case elfcpp::R_SPARC_TLS_GD_LO10: case elfcpp::R_SPARC_TLS_GD_ADD: case elfcpp::R_SPARC_TLS_GD_CALL: // These are General-Dynamic which permits fully general TLS // access. Since we know that we are generating an executable, // we can convert this to Initial-Exec. If we also know that // this is a local symbol, we can further switch to Local-Exec. if (is_final) return tls::TLSOPT_TO_LE; return tls::TLSOPT_TO_IE; case elfcpp::R_SPARC_TLS_LDM_HI22: // Local-dynamic case elfcpp::R_SPARC_TLS_LDM_LO10: case elfcpp::R_SPARC_TLS_LDM_ADD: case elfcpp::R_SPARC_TLS_LDM_CALL: // This is Local-Dynamic, which refers to a local symbol in the // dynamic TLS block. Since we know that we generating an // executable, we can switch to Local-Exec. return tls::TLSOPT_TO_LE; case elfcpp::R_SPARC_TLS_LDO_HIX22: // Alternate local-dynamic case elfcpp::R_SPARC_TLS_LDO_LOX10: case elfcpp::R_SPARC_TLS_LDO_ADD: // Another type of Local-Dynamic relocation. return tls::TLSOPT_TO_LE; case elfcpp::R_SPARC_TLS_IE_HI22: // Initial-exec case elfcpp::R_SPARC_TLS_IE_LO10: case elfcpp::R_SPARC_TLS_IE_LD: case elfcpp::R_SPARC_TLS_IE_LDX: case elfcpp::R_SPARC_TLS_IE_ADD: // These are Initial-Exec relocs which get the thread offset // from the GOT. If we know that we are linking against the // local symbol, we can switch to Local-Exec, which links the // thread offset into the instruction. if (is_final) return tls::TLSOPT_TO_LE; return tls::TLSOPT_NONE; case elfcpp::R_SPARC_TLS_LE_HIX22: // Local-exec case elfcpp::R_SPARC_TLS_LE_LOX10: // When we already have Local-Exec, there is nothing further we // can do. return tls::TLSOPT_NONE; default: gold_unreachable(); } } // Get the Reference_flags for a particular relocation. template<int size, bool big_endian> int Target_sparc<size, big_endian>::Scan::get_reference_flags(unsigned int r_type) { r_type &= 0xff; switch (r_type) { case elfcpp::R_SPARC_NONE: case elfcpp::R_SPARC_REGISTER: case elfcpp::R_SPARC_GNU_VTINHERIT: case elfcpp::R_SPARC_GNU_VTENTRY: // No symbol reference. return 0; case elfcpp::R_SPARC_UA64: case elfcpp::R_SPARC_64: case elfcpp::R_SPARC_HIX22: case elfcpp::R_SPARC_LOX10: case elfcpp::R_SPARC_H44: case elfcpp::R_SPARC_M44: case elfcpp::R_SPARC_L44: case elfcpp::R_SPARC_HH22: case elfcpp::R_SPARC_HM10: case elfcpp::R_SPARC_LM22: case elfcpp::R_SPARC_HI22: case elfcpp::R_SPARC_LO10: case elfcpp::R_SPARC_OLO10: case elfcpp::R_SPARC_UA32: case elfcpp::R_SPARC_32: case elfcpp::R_SPARC_UA16: case elfcpp::R_SPARC_16: case elfcpp::R_SPARC_11: case elfcpp::R_SPARC_10: case elfcpp::R_SPARC_8: case elfcpp::R_SPARC_7: case elfcpp::R_SPARC_6: case elfcpp::R_SPARC_5: return Symbol::ABSOLUTE_REF; case elfcpp::R_SPARC_DISP8: case elfcpp::R_SPARC_DISP16: case elfcpp::R_SPARC_DISP32: case elfcpp::R_SPARC_DISP64: case elfcpp::R_SPARC_PC_HH22: case elfcpp::R_SPARC_PC_HM10: case elfcpp::R_SPARC_PC_LM22: case elfcpp::R_SPARC_PC10: case elfcpp::R_SPARC_PC22: case elfcpp::R_SPARC_WDISP30: case elfcpp::R_SPARC_WDISP22: case elfcpp::R_SPARC_WDISP19: case elfcpp::R_SPARC_WDISP16: return Symbol::RELATIVE_REF; case elfcpp::R_SPARC_PLT64: case elfcpp::R_SPARC_PLT32: case elfcpp::R_SPARC_HIPLT22: case elfcpp::R_SPARC_LOPLT10: case elfcpp::R_SPARC_PCPLT10: return Symbol::FUNCTION_CALL | Symbol::ABSOLUTE_REF; case elfcpp::R_SPARC_PCPLT32: case elfcpp::R_SPARC_PCPLT22: case elfcpp::R_SPARC_WPLT30: return Symbol::FUNCTION_CALL | Symbol::RELATIVE_REF; case elfcpp::R_SPARC_GOTDATA_OP: case elfcpp::R_SPARC_GOTDATA_OP_HIX22: case elfcpp::R_SPARC_GOTDATA_OP_LOX10: case elfcpp::R_SPARC_GOT10: case elfcpp::R_SPARC_GOT13: case elfcpp::R_SPARC_GOT22: // Absolute in GOT. return Symbol::ABSOLUTE_REF; case elfcpp::R_SPARC_TLS_GD_HI22: // Global-dynamic case elfcpp::R_SPARC_TLS_GD_LO10: case elfcpp::R_SPARC_TLS_GD_ADD: case elfcpp::R_SPARC_TLS_GD_CALL: case elfcpp::R_SPARC_TLS_LDM_HI22: // Local-dynamic case elfcpp::R_SPARC_TLS_LDM_LO10: case elfcpp::R_SPARC_TLS_LDM_ADD: case elfcpp::R_SPARC_TLS_LDM_CALL: case elfcpp::R_SPARC_TLS_LDO_HIX22: // Alternate local-dynamic case elfcpp::R_SPARC_TLS_LDO_LOX10: case elfcpp::R_SPARC_TLS_LDO_ADD: case elfcpp::R_SPARC_TLS_LE_HIX22: case elfcpp::R_SPARC_TLS_LE_LOX10: case elfcpp::R_SPARC_TLS_IE_HI22: // Initial-exec case elfcpp::R_SPARC_TLS_IE_LO10: case elfcpp::R_SPARC_TLS_IE_LD: case elfcpp::R_SPARC_TLS_IE_LDX: case elfcpp::R_SPARC_TLS_IE_ADD: return Symbol::TLS_REF; case elfcpp::R_SPARC_COPY: case elfcpp::R_SPARC_GLOB_DAT: case elfcpp::R_SPARC_JMP_SLOT: case elfcpp::R_SPARC_RELATIVE: case elfcpp::R_SPARC_TLS_DTPMOD64: case elfcpp::R_SPARC_TLS_DTPMOD32: case elfcpp::R_SPARC_TLS_DTPOFF64: case elfcpp::R_SPARC_TLS_DTPOFF32: case elfcpp::R_SPARC_TLS_TPOFF64: case elfcpp::R_SPARC_TLS_TPOFF32: default: // Not expected. We will give an error later. return 0; } } // Generate a PLT entry slot for a call to __tls_get_addr template<int size, bool big_endian> void Target_sparc<size, big_endian>::Scan::generate_tls_call(Symbol_table* symtab, Layout* layout, Target_sparc<size, big_endian>* target) { Symbol* gsym = target->tls_get_addr_sym(symtab); target->make_plt_entry(symtab, layout, gsym); } // Report an unsupported relocation against a local symbol. template<int size, bool big_endian> void Target_sparc<size, big_endian>::Scan::unsupported_reloc_local( Sized_relobj_file<size, big_endian>* object, unsigned int r_type) { gold_error(_("%s: unsupported reloc %u against local symbol"), object->name().c_str(), r_type); } // We are about to emit a dynamic relocation of type R_TYPE. If the // dynamic linker does not support it, issue an error. template<int size, bool big_endian> void Target_sparc<size, big_endian>::Scan::check_non_pic(Relobj* object, unsigned int r_type) { gold_assert(r_type != elfcpp::R_SPARC_NONE); if (size == 64) { switch (r_type) { // These are the relocation types supported by glibc for sparc 64-bit. case elfcpp::R_SPARC_RELATIVE: case elfcpp::R_SPARC_COPY: case elfcpp::R_SPARC_64: case elfcpp::R_SPARC_GLOB_DAT: case elfcpp::R_SPARC_JMP_SLOT: case elfcpp::R_SPARC_TLS_DTPMOD64: case elfcpp::R_SPARC_TLS_DTPOFF64: case elfcpp::R_SPARC_TLS_TPOFF64: case elfcpp::R_SPARC_TLS_LE_HIX22: case elfcpp::R_SPARC_TLS_LE_LOX10: case elfcpp::R_SPARC_8: case elfcpp::R_SPARC_16: case elfcpp::R_SPARC_DISP8: case elfcpp::R_SPARC_DISP16: case elfcpp::R_SPARC_DISP32: case elfcpp::R_SPARC_WDISP30: case elfcpp::R_SPARC_LO10: case elfcpp::R_SPARC_HI22: case elfcpp::R_SPARC_OLO10: case elfcpp::R_SPARC_H44: case elfcpp::R_SPARC_M44: case elfcpp::R_SPARC_L44: case elfcpp::R_SPARC_HH22: case elfcpp::R_SPARC_HM10: case elfcpp::R_SPARC_LM22: case elfcpp::R_SPARC_UA16: case elfcpp::R_SPARC_UA32: case elfcpp::R_SPARC_UA64: return; default: break; } } else { switch (r_type) { // These are the relocation types supported by glibc for sparc 32-bit. case elfcpp::R_SPARC_RELATIVE: case elfcpp::R_SPARC_COPY: case elfcpp::R_SPARC_GLOB_DAT: case elfcpp::R_SPARC_32: case elfcpp::R_SPARC_JMP_SLOT: case elfcpp::R_SPARC_TLS_DTPMOD32: case elfcpp::R_SPARC_TLS_DTPOFF32: case elfcpp::R_SPARC_TLS_TPOFF32: case elfcpp::R_SPARC_TLS_LE_HIX22: case elfcpp::R_SPARC_TLS_LE_LOX10: case elfcpp::R_SPARC_8: case elfcpp::R_SPARC_16: case elfcpp::R_SPARC_DISP8: case elfcpp::R_SPARC_DISP16: case elfcpp::R_SPARC_DISP32: case elfcpp::R_SPARC_LO10: case elfcpp::R_SPARC_WDISP30: case elfcpp::R_SPARC_HI22: case elfcpp::R_SPARC_UA16: case elfcpp::R_SPARC_UA32: return; default: break; } } // This prevents us from issuing more than one error per reloc // section. But we can still wind up issuing more than one // error per object file. if (this->issued_non_pic_error_) return; gold_assert(parameters->options().output_is_position_independent()); object->error(_("requires unsupported dynamic reloc; " "recompile with -fPIC")); this->issued_non_pic_error_ = true; return; } // Scan a relocation for a local symbol. template<int size, bool big_endian> inline void Target_sparc<size, big_endian>::Scan::local( Symbol_table* symtab, Layout* layout, Target_sparc<size, big_endian>* target, Sized_relobj_file<size, big_endian>* object, unsigned int data_shndx, Output_section* output_section, const elfcpp::Rela<size, big_endian>& reloc, unsigned int r_type, const elfcpp::Sym<size, big_endian>& lsym) { unsigned int orig_r_type = r_type; r_type &= 0xff; switch (r_type) { case elfcpp::R_SPARC_NONE: case elfcpp::R_SPARC_REGISTER: case elfcpp::R_SPARC_GNU_VTINHERIT: case elfcpp::R_SPARC_GNU_VTENTRY: break; case elfcpp::R_SPARC_64: case elfcpp::R_SPARC_32: // If building a shared library (or a position-independent // executable), we need to create a dynamic relocation for // this location. The relocation applied at link time will // apply the link-time value, so we flag the location with // an R_SPARC_RELATIVE relocation so the dynamic loader can // relocate it easily. if (parameters->options().output_is_position_independent()) { Reloc_section* rela_dyn = target->rela_dyn_section(layout); unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); rela_dyn->add_local_relative(object, r_sym, elfcpp::R_SPARC_RELATIVE, output_section, data_shndx, reloc.get_r_offset(), reloc.get_r_addend()); } break; case elfcpp::R_SPARC_HIX22: case elfcpp::R_SPARC_LOX10: case elfcpp::R_SPARC_H44: case elfcpp::R_SPARC_M44: case elfcpp::R_SPARC_L44: case elfcpp::R_SPARC_HH22: case elfcpp::R_SPARC_HM10: case elfcpp::R_SPARC_LM22: case elfcpp::R_SPARC_UA64: case elfcpp::R_SPARC_UA32: case elfcpp::R_SPARC_UA16: case elfcpp::R_SPARC_HI22: case elfcpp::R_SPARC_LO10: case elfcpp::R_SPARC_OLO10: case elfcpp::R_SPARC_16: case elfcpp::R_SPARC_11: case elfcpp::R_SPARC_10: case elfcpp::R_SPARC_8: case elfcpp::R_SPARC_7: case elfcpp::R_SPARC_6: case elfcpp::R_SPARC_5: // If building a shared library (or a position-independent // executable), we need to create a dynamic relocation for // this location. if (parameters->options().output_is_position_independent()) { Reloc_section* rela_dyn = target->rela_dyn_section(layout); unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); check_non_pic(object, r_type); if (lsym.get_st_type() != elfcpp::STT_SECTION) { rela_dyn->add_local(object, r_sym, orig_r_type, output_section, data_shndx, reloc.get_r_offset(), reloc.get_r_addend()); } else { gold_assert(lsym.get_st_value() == 0); rela_dyn->add_symbolless_local_addend(object, r_sym, orig_r_type, output_section, data_shndx, reloc.get_r_offset(), reloc.get_r_addend()); } } break; case elfcpp::R_SPARC_WDISP30: case elfcpp::R_SPARC_WPLT30: case elfcpp::R_SPARC_WDISP22: case elfcpp::R_SPARC_WDISP19: case elfcpp::R_SPARC_WDISP16: case elfcpp::R_SPARC_DISP8: case elfcpp::R_SPARC_DISP16: case elfcpp::R_SPARC_DISP32: case elfcpp::R_SPARC_DISP64: case elfcpp::R_SPARC_PC10: case elfcpp::R_SPARC_PC22: break; case elfcpp::R_SPARC_GOTDATA_OP: case elfcpp::R_SPARC_GOTDATA_OP_HIX22: case elfcpp::R_SPARC_GOTDATA_OP_LOX10: case elfcpp::R_SPARC_GOT10: case elfcpp::R_SPARC_GOT13: case elfcpp::R_SPARC_GOT22: { // The symbol requires a GOT entry. Output_data_got<size, big_endian>* got; unsigned int r_sym; got = target->got_section(symtab, layout); r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); // If we are generating a shared object, we need to add a // dynamic relocation for this symbol's GOT entry. if (parameters->options().output_is_position_independent()) { if (!object->local_has_got_offset(r_sym, GOT_TYPE_STANDARD)) { Reloc_section* rela_dyn = target->rela_dyn_section(layout); unsigned int off; 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); } } else got->add_local(object, r_sym, GOT_TYPE_STANDARD); } break; // These are initial TLS relocs, which are expected when // linking. case elfcpp::R_SPARC_TLS_GD_HI22: // Global-dynamic case elfcpp::R_SPARC_TLS_GD_LO10: case elfcpp::R_SPARC_TLS_GD_ADD: case elfcpp::R_SPARC_TLS_GD_CALL: case elfcpp::R_SPARC_TLS_LDM_HI22 : // Local-dynamic case elfcpp::R_SPARC_TLS_LDM_LO10: case elfcpp::R_SPARC_TLS_LDM_ADD: case elfcpp::R_SPARC_TLS_LDM_CALL: case elfcpp::R_SPARC_TLS_LDO_HIX22: // Alternate local-dynamic case elfcpp::R_SPARC_TLS_LDO_LOX10: case elfcpp::R_SPARC_TLS_LDO_ADD: case elfcpp::R_SPARC_TLS_IE_HI22: // Initial-exec case elfcpp::R_SPARC_TLS_IE_LO10: case elfcpp::R_SPARC_TLS_IE_LD: case elfcpp::R_SPARC_TLS_IE_LDX: case elfcpp::R_SPARC_TLS_IE_ADD: case elfcpp::R_SPARC_TLS_LE_HIX22: // Local-exec case elfcpp::R_SPARC_TLS_LE_LOX10: { bool output_is_shared = parameters->options().shared(); const tls::Tls_optimization optimized_type = optimize_tls_reloc(!output_is_shared, r_type); switch (r_type) { case elfcpp::R_SPARC_TLS_GD_HI22: // Global-dynamic case elfcpp::R_SPARC_TLS_GD_LO10: case elfcpp::R_SPARC_TLS_GD_ADD: case elfcpp::R_SPARC_TLS_GD_CALL: if (optimized_type == tls::TLSOPT_NONE) { // Create a pair of GOT entries for the module index and // dtv-relative offset. Output_data_got<size, big_endian>* got = target->got_section(symtab, layout); unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); unsigned int shndx = lsym.get_st_shndx(); bool is_ordinary; shndx = object->adjust_sym_shndx(r_sym, shndx, &is_ordinary); if (!is_ordinary) object->error(_("local symbol %u has bad shndx %u"), r_sym, shndx); else got->add_local_pair_with_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); if (r_type == elfcpp::R_SPARC_TLS_GD_CALL) generate_tls_call(symtab, layout, target); } else if (optimized_type != tls::TLSOPT_TO_LE) unsupported_reloc_local(object, r_type); break; case elfcpp::R_SPARC_TLS_LDM_HI22 : // Local-dynamic case elfcpp::R_SPARC_TLS_LDM_LO10: case elfcpp::R_SPARC_TLS_LDM_ADD: case elfcpp::R_SPARC_TLS_LDM_CALL: if (optimized_type == tls::TLSOPT_NONE) { // Create a GOT entry for the module index. target->got_mod_index_entry(symtab, layout, object); if (r_type == elfcpp::R_SPARC_TLS_LDM_CALL) generate_tls_call(symtab, layout, target); } else if (optimized_type != tls::TLSOPT_TO_LE) unsupported_reloc_local(object, r_type); break; case elfcpp::R_SPARC_TLS_LDO_HIX22: // Alternate local-dynamic case elfcpp::R_SPARC_TLS_LDO_LOX10: case elfcpp::R_SPARC_TLS_LDO_ADD: break; case elfcpp::R_SPARC_TLS_IE_HI22: // Initial-exec case elfcpp::R_SPARC_TLS_IE_LO10: case elfcpp::R_SPARC_TLS_IE_LD: case elfcpp::R_SPARC_TLS_IE_LDX: case elfcpp::R_SPARC_TLS_IE_ADD: layout->set_has_static_tls(); if (optimized_type == tls::TLSOPT_NONE) { // Create a GOT entry for the tp-relative offset. Output_data_got<size, big_endian>* got = target->got_section(symtab, layout); unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); if (!object->local_has_got_offset(r_sym, GOT_TYPE_TLS_OFFSET)) { Reloc_section* rela_dyn = target->rela_dyn_section(layout); unsigned int off = got->add_constant(0); object->set_local_got_offset(r_sym, GOT_TYPE_TLS_OFFSET, off); rela_dyn->add_symbolless_local_addend(object, r_sym, (size == 64 ? elfcpp::R_SPARC_TLS_TPOFF64 : elfcpp::R_SPARC_TLS_TPOFF32), got, off, 0); } } else if (optimized_type != tls::TLSOPT_TO_LE) unsupported_reloc_local(object, r_type); break; case elfcpp::R_SPARC_TLS_LE_HIX22: // Local-exec case elfcpp::R_SPARC_TLS_LE_LOX10: layout->set_has_static_tls(); if (output_is_shared) { // We need to create a dynamic relocation. gold_assert(lsym.get_st_type() != elfcpp::STT_SECTION); unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); Reloc_section* rela_dyn = target->rela_dyn_section(layout); rela_dyn->add_symbolless_local_addend(object, r_sym, r_type, output_section, data_shndx, reloc.get_r_offset(), 0); } break; } } break; // These are relocations which should only be seen by the // dynamic linker, and should never be seen here. case elfcpp::R_SPARC_COPY: case elfcpp::R_SPARC_GLOB_DAT: case elfcpp::R_SPARC_JMP_SLOT: case elfcpp::R_SPARC_RELATIVE: case elfcpp::R_SPARC_TLS_DTPMOD64: case elfcpp::R_SPARC_TLS_DTPMOD32: case elfcpp::R_SPARC_TLS_DTPOFF64: case elfcpp::R_SPARC_TLS_DTPOFF32: case elfcpp::R_SPARC_TLS_TPOFF64: case elfcpp::R_SPARC_TLS_TPOFF32: gold_error(_("%s: unexpected reloc %u in object file"), object->name().c_str(), r_type); break; default: unsupported_reloc_local(object, r_type); break; } } // Report an unsupported relocation against a global symbol. template<int size, bool big_endian> void Target_sparc<size, big_endian>::Scan::unsupported_reloc_global( Sized_relobj_file<size, big_endian>* object, unsigned int r_type, Symbol* gsym) { gold_error(_("%s: unsupported reloc %u against global symbol %s"), object->name().c_str(), r_type, gsym->demangled_name().c_str()); } // Scan a relocation for a global symbol. template<int size, bool big_endian> inline void Target_sparc<size, big_endian>::Scan::global( Symbol_table* symtab, Layout* layout, Target_sparc<size, big_endian>* target, Sized_relobj_file<size, big_endian>* object, unsigned int data_shndx, Output_section* output_section, const elfcpp::Rela<size, big_endian>& reloc, unsigned int r_type, Symbol* gsym) { unsigned int orig_r_type = r_type; // A reference to _GLOBAL_OFFSET_TABLE_ implies that we need a got // section. We check here to avoid creating a dynamic reloc against // _GLOBAL_OFFSET_TABLE_. if (!target->has_got_section() && strcmp(gsym->name(), "_GLOBAL_OFFSET_TABLE_") == 0) target->got_section(symtab, layout); r_type &= 0xff; switch (r_type) { case elfcpp::R_SPARC_NONE: case elfcpp::R_SPARC_REGISTER: case elfcpp::R_SPARC_GNU_VTINHERIT: case elfcpp::R_SPARC_GNU_VTENTRY: break; case elfcpp::R_SPARC_PLT64: case elfcpp::R_SPARC_PLT32: case elfcpp::R_SPARC_HIPLT22: case elfcpp::R_SPARC_LOPLT10: case elfcpp::R_SPARC_PCPLT32: case elfcpp::R_SPARC_PCPLT22: case elfcpp::R_SPARC_PCPLT10: case elfcpp::R_SPARC_WPLT30: // If the symbol is fully resolved, this is just a PC32 reloc. // Otherwise we need a PLT entry. if (gsym->final_value_is_known()) break; // If building a shared library, we can also skip the PLT entry // if the symbol is defined in the output file and is protected // or hidden. if (gsym->is_defined() && !gsym->is_from_dynobj() && !gsym->is_preemptible()) break; target->make_plt_entry(symtab, layout, gsym); break; case elfcpp::R_SPARC_DISP8: case elfcpp::R_SPARC_DISP16: case elfcpp::R_SPARC_DISP32: case elfcpp::R_SPARC_DISP64: case elfcpp::R_SPARC_PC_HH22: case elfcpp::R_SPARC_PC_HM10: case elfcpp::R_SPARC_PC_LM22: case elfcpp::R_SPARC_PC10: case elfcpp::R_SPARC_PC22: case elfcpp::R_SPARC_WDISP30: case elfcpp::R_SPARC_WDISP22: case elfcpp::R_SPARC_WDISP19: case elfcpp::R_SPARC_WDISP16: { 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, orig_r_type, output_section, object, data_shndx, reloc.get_r_offset(), reloc.get_r_addend()); } } } break; case elfcpp::R_SPARC_UA64: case elfcpp::R_SPARC_64: case elfcpp::R_SPARC_HIX22: case elfcpp::R_SPARC_LOX10: case elfcpp::R_SPARC_H44: case elfcpp::R_SPARC_M44: case elfcpp::R_SPARC_L44: case elfcpp::R_SPARC_HH22: case elfcpp::R_SPARC_HM10: case elfcpp::R_SPARC_LM22: case elfcpp::R_SPARC_HI22: case elfcpp::R_SPARC_LO10: case elfcpp::R_SPARC_OLO10: case elfcpp::R_SPARC_UA32: case elfcpp::R_SPARC_32: case elfcpp::R_SPARC_UA16: case elfcpp::R_SPARC_16: case elfcpp::R_SPARC_11: case elfcpp::R_SPARC_10: case elfcpp::R_SPARC_8: case elfcpp::R_SPARC_7: case elfcpp::R_SPARC_6: case elfcpp::R_SPARC_5: { // Make a PLT entry if necessary. if (gsym->needs_plt_entry()) { target->make_plt_entry(symtab, layout, gsym); // Since this is not a PC-relative relocation, we may be // taking the address of a function. In that case we need to // set the entry in the dynamic symbol table to the address of // the PLT entry. if (gsym->is_from_dynobj() && !parameters->options().shared()) gsym->set_needs_dynsym_value(); } // Make a dynamic relocation if necessary. if (gsym->needs_dynamic_reloc(Scan::get_reference_flags(r_type))) { unsigned int r_off = reloc.get_r_offset(); // The assembler can sometimes emit unaligned relocations // for dwarf2 cfi directives. switch (r_type) { case elfcpp::R_SPARC_16: if (r_off & 0x1) orig_r_type = r_type = elfcpp::R_SPARC_UA16; break; case elfcpp::R_SPARC_32: if (r_off & 0x3) orig_r_type = r_type = elfcpp::R_SPARC_UA32; break; case elfcpp::R_SPARC_64: if (r_off & 0x7) orig_r_type = r_type = elfcpp::R_SPARC_UA64; break; case elfcpp::R_SPARC_UA16: if (!(r_off & 0x1)) orig_r_type = r_type = elfcpp::R_SPARC_16; break; case elfcpp::R_SPARC_UA32: if (!(r_off & 0x3)) orig_r_type = r_type = elfcpp::R_SPARC_32; break; case elfcpp::R_SPARC_UA64: if (!(r_off & 0x7)) orig_r_type = r_type = elfcpp::R_SPARC_64; break; } if (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 || r_type == elfcpp::R_SPARC_64) && gsym->can_use_relative_reloc(false)) { Reloc_section* rela_dyn = target->rela_dyn_section(layout); rela_dyn->add_global_relative(gsym, elfcpp::R_SPARC_RELATIVE, output_section, object, data_shndx, reloc.get_r_offset(), reloc.get_r_addend()); } else { Reloc_section* rela_dyn = target->rela_dyn_section(layout); check_non_pic(object, r_type); if (gsym->is_from_dynobj() || gsym->is_undefined() || gsym->is_preemptible()) rela_dyn->add_global(gsym, orig_r_type, output_section, object, data_shndx, reloc.get_r_offset(), reloc.get_r_addend()); else rela_dyn->add_symbolless_global_addend(gsym, orig_r_type, output_section, object, data_shndx, reloc.get_r_offset(), reloc.get_r_addend()); } } } break; case elfcpp::R_SPARC_GOTDATA_OP: case elfcpp::R_SPARC_GOTDATA_OP_HIX22: case elfcpp::R_SPARC_GOTDATA_OP_LOX10: case elfcpp::R_SPARC_GOT10: case elfcpp::R_SPARC_GOT13: case elfcpp::R_SPARC_GOT22: { // The symbol requires a GOT entry. Output_data_got<size, big_endian>* got; got = target->got_section(symtab, layout); if (gsym->final_value_is_known()) 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)) { unsigned int off = got->add_constant(0); gsym->set_got_offset(GOT_TYPE_STANDARD, off); rela_dyn->add_global_relative(gsym, elfcpp::R_SPARC_RELATIVE, got, off, 0); } } } break; // These are initial tls relocs, which are expected when // linking. case elfcpp::R_SPARC_TLS_GD_HI22: // Global-dynamic case elfcpp::R_SPARC_TLS_GD_LO10: case elfcpp::R_SPARC_TLS_GD_ADD: case elfcpp::R_SPARC_TLS_GD_CALL: case elfcpp::R_SPARC_TLS_LDM_HI22: // Local-dynamic case elfcpp::R_SPARC_TLS_LDM_LO10: case elfcpp::R_SPARC_TLS_LDM_ADD: case elfcpp::R_SPARC_TLS_LDM_CALL: case elfcpp::R_SPARC_TLS_LDO_HIX22: // Alternate local-dynamic case elfcpp::R_SPARC_TLS_LDO_LOX10: case elfcpp::R_SPARC_TLS_LDO_ADD: case elfcpp::R_SPARC_TLS_LE_HIX22: case elfcpp::R_SPARC_TLS_LE_LOX10: case elfcpp::R_SPARC_TLS_IE_HI22: // Initial-exec case elfcpp::R_SPARC_TLS_IE_LO10: case elfcpp::R_SPARC_TLS_IE_LD: case elfcpp::R_SPARC_TLS_IE_LDX: case elfcpp::R_SPARC_TLS_IE_ADD: { const bool is_final = gsym->final_value_is_known(); const tls::Tls_optimization optimized_type = optimize_tls_reloc(is_final, r_type); switch (r_type) { case elfcpp::R_SPARC_TLS_GD_HI22: // Global-dynamic case elfcpp::R_SPARC_TLS_GD_LO10: case elfcpp::R_SPARC_TLS_GD_ADD: case elfcpp::R_SPARC_TLS_GD_CALL: if (optimized_type == tls::TLSOPT_NONE) { // Create a pair of GOT entries for the module index and // dtv-relative offset. Output_data_got<size, big_endian>* got = target->got_section(symtab, layout); got->add_global_pair_with_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)); // Emit R_SPARC_WPLT30 against "__tls_get_addr" if (r_type == elfcpp::R_SPARC_TLS_GD_CALL) generate_tls_call(symtab, layout, target); } else if (optimized_type == tls::TLSOPT_TO_IE) { // Create a GOT entry for the tp-relative offset. Output_data_got<size, big_endian>* got = target->got_section(symtab, layout); got->add_global_with_rela(gsym, GOT_TYPE_TLS_OFFSET, target->rela_dyn_section(layout), (size == 64 ? elfcpp::R_SPARC_TLS_TPOFF64 : elfcpp::R_SPARC_TLS_TPOFF32)); } else if (optimized_type != tls::TLSOPT_TO_LE) unsupported_reloc_global(object, r_type, gsym); break; case elfcpp::R_SPARC_TLS_LDM_HI22: // Local-dynamic case elfcpp::R_SPARC_TLS_LDM_LO10: case elfcpp::R_SPARC_TLS_LDM_ADD: case elfcpp::R_SPARC_TLS_LDM_CALL: if (optimized_type == tls::TLSOPT_NONE) { // Create a GOT entry for the module index. target->got_mod_index_entry(symtab, layout, object); if (r_type == elfcpp::R_SPARC_TLS_LDM_CALL) generate_tls_call(symtab, layout, target); } else if (optimized_type != tls::TLSOPT_TO_LE) unsupported_reloc_global(object, r_type, gsym); break; case elfcpp::R_SPARC_TLS_LDO_HIX22: // Alternate local-dynamic case elfcpp::R_SPARC_TLS_LDO_LOX10: case elfcpp::R_SPARC_TLS_LDO_ADD: break; case elfcpp::R_SPARC_TLS_LE_HIX22: case elfcpp::R_SPARC_TLS_LE_LOX10: layout->set_has_static_tls(); if (parameters->options().shared()) { Reloc_section* rela_dyn = target->rela_dyn_section(layout); rela_dyn->add_symbolless_global_addend(gsym, orig_r_type, output_section, object, data_shndx, reloc.get_r_offset(), 0); } break; case elfcpp::R_SPARC_TLS_IE_HI22: // Initial-exec case elfcpp::R_SPARC_TLS_IE_LO10: case elfcpp::R_SPARC_TLS_IE_LD: case elfcpp::R_SPARC_TLS_IE_LDX: case elfcpp::R_SPARC_TLS_IE_ADD: layout->set_has_static_tls(); if (optimized_type == tls::TLSOPT_NONE) { // Create a GOT entry for the tp-relative offset. Output_data_got<size, big_endian>* got = target->got_section(symtab, layout); got->add_global_with_rela(gsym, GOT_TYPE_TLS_OFFSET, target->rela_dyn_section(layout), (size == 64 ? elfcpp::R_SPARC_TLS_TPOFF64 : elfcpp::R_SPARC_TLS_TPOFF32)); } else if (optimized_type != tls::TLSOPT_TO_LE) unsupported_reloc_global(object, r_type, gsym); break; } } break; // These are relocations which should only be seen by the // dynamic linker, and should never be seen here. case elfcpp::R_SPARC_COPY: case elfcpp::R_SPARC_GLOB_DAT: case elfcpp::R_SPARC_JMP_SLOT: case elfcpp::R_SPARC_RELATIVE: case elfcpp::R_SPARC_TLS_DTPMOD64: case elfcpp::R_SPARC_TLS_DTPMOD32: case elfcpp::R_SPARC_TLS_DTPOFF64: case elfcpp::R_SPARC_TLS_DTPOFF32: case elfcpp::R_SPARC_TLS_TPOFF64: case elfcpp::R_SPARC_TLS_TPOFF32: gold_error(_("%s: unexpected reloc %u in object file"), object->name().c_str(), r_type); break; default: unsupported_reloc_global(object, r_type, gsym); break; } } // Process relocations for gc. template<int size, bool big_endian> void Target_sparc<size, big_endian>::gc_process_relocs( Symbol_table* symtab, Layout* layout, Sized_relobj_file<size, big_endian>* object, unsigned int data_shndx, unsigned int, const unsigned char* prelocs, size_t reloc_count, Output_section* output_section, bool needs_special_offset_handling, size_t local_symbol_count, const unsigned char* plocal_symbols) { typedef Target_sparc<size, big_endian> Sparc; typedef typename Target_sparc<size, big_endian>::Scan Scan; gold::gc_process_relocs<size, big_endian, Sparc, elfcpp::SHT_RELA, Scan, typename Target_sparc::Relocatable_size_for_reloc>( symtab, layout, this, object, data_shndx, prelocs, reloc_count, output_section, needs_special_offset_handling, local_symbol_count, plocal_symbols); } // Scan relocations for a section. template<int size, bool big_endian> void Target_sparc<size, big_endian>::scan_relocs( Symbol_table* symtab, Layout* layout, Sized_relobj_file<size, big_endian>* object, unsigned int data_shndx, unsigned int sh_type, const unsigned char* prelocs, size_t reloc_count, Output_section* output_section, bool needs_special_offset_handling, size_t local_symbol_count, const unsigned char* plocal_symbols) { typedef Target_sparc<size, big_endian> Sparc; typedef typename Target_sparc<size, big_endian>::Scan Scan; if (sh_type == elfcpp::SHT_REL) { gold_error(_("%s: unsupported REL reloc section"), object->name().c_str()); return; } gold::scan_relocs<size, big_endian, Sparc, elfcpp::SHT_RELA, Scan>( symtab, layout, this, object, data_shndx, prelocs, reloc_count, output_section, needs_special_offset_handling, local_symbol_count, plocal_symbols); } // Finalize the sections. template<int size, bool big_endian> void Target_sparc<size, big_endian>::do_finalize_sections( Layout* layout, const Input_objects*, Symbol_table*) { // Fill in some more dynamic tags. const Reloc_section* rel_plt = (this->plt_ == NULL ? NULL : this->plt_->rel_plt()); layout->add_target_dynamic_tags(false, this->plt_, rel_plt, this->rela_dyn_, true, true); // Emit any relocs we saved in an attempt to avoid generating COPY // relocs. if (this->copy_relocs_.any_saved_relocs()) this->copy_relocs_.emit(this->rela_dyn_section(layout)); } // Perform a relocation. template<int size, bool big_endian> inline bool Target_sparc<size, big_endian>::Relocate::relocate( const Relocate_info<size, big_endian>* relinfo, Target_sparc* target, Output_section*, size_t relnum, const elfcpp::Rela<size, big_endian>& rela, unsigned int r_type, const Sized_symbol<size>* gsym, const Symbol_value<size>* psymval, unsigned char* view, typename elfcpp::Elf_types<size>::Elf_Addr address, section_size_type view_size) { r_type &= 0xff; if (this->ignore_gd_add_) { if (r_type != elfcpp::R_SPARC_TLS_GD_ADD) gold_error_at_location(relinfo, relnum, rela.get_r_offset(), _("missing expected TLS relocation")); else { this->ignore_gd_add_ = false; return false; } } typedef Sparc_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; 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; switch (r_type) { case elfcpp::R_SPARC_GOTDATA_OP: case elfcpp::R_SPARC_GOTDATA_OP_HIX22: case elfcpp::R_SPARC_GOTDATA_OP_LOX10: case elfcpp::R_SPARC_GOT10: case elfcpp::R_SPARC_GOT13: case elfcpp::R_SPARC_GOT22: if (gsym != NULL) { gold_assert(gsym->has_got_offset(GOT_TYPE_STANDARD)); got_offset = gsym->got_offset(GOT_TYPE_STANDARD); } else { unsigned int r_sym = elfcpp::elf_r_sym<size>(rela.get_r_info()); gold_assert(object->local_has_got_offset(r_sym, GOT_TYPE_STANDARD)); got_offset = object->local_got_offset(r_sym, GOT_TYPE_STANDARD); } break; default: break; } switch (r_type) { case elfcpp::R_SPARC_NONE: case elfcpp::R_SPARC_REGISTER: case elfcpp::R_SPARC_GNU_VTINHERIT: case elfcpp::R_SPARC_GNU_VTENTRY: break; case elfcpp::R_SPARC_8: Relocate_functions<size, big_endian>::rela8(view, object, psymval, addend); break; case elfcpp::R_SPARC_16: if (rela.get_r_offset() & 0x1) { // The assembler can sometimes emit unaligned relocations // for dwarf2 cfi directives. Reloc::ua16(view, object, psymval, addend); } else Relocate_functions<size, big_endian>::rela16(view, object, psymval, addend); break; case elfcpp::R_SPARC_32: if (!parameters->options().output_is_position_independent()) { if (rela.get_r_offset() & 0x3) { // The assembler can sometimes emit unaligned relocations // for dwarf2 cfi directives. Reloc::ua32(view, object, psymval, addend); } else Relocate_functions<size, big_endian>::rela32(view, object, psymval, addend); } break; case elfcpp::R_SPARC_DISP8: Reloc::disp8(view, object, psymval, addend, address); break; case elfcpp::R_SPARC_DISP16: Reloc::disp16(view, object, psymval, addend, address); break; case elfcpp::R_SPARC_DISP32: Reloc::disp32(view, object, psymval, addend, address); break; case elfcpp::R_SPARC_DISP64: Reloc::disp64(view, object, psymval, addend, address); break; case elfcpp::R_SPARC_WDISP30: case elfcpp::R_SPARC_WPLT30: Reloc::wdisp30(view, object, psymval, addend, address); break; case elfcpp::R_SPARC_WDISP22: Reloc::wdisp22(view, object, psymval, addend, address); break; case elfcpp::R_SPARC_WDISP19: Reloc::wdisp19(view, object, psymval, addend, address); break; case elfcpp::R_SPARC_WDISP16: Reloc::wdisp16(view, object, psymval, addend, address); break; case elfcpp::R_SPARC_HI22: Reloc::hi22(view, object, psymval, addend); break; case elfcpp::R_SPARC_22: Reloc::rela32_22(view, object, psymval, addend); break; case elfcpp::R_SPARC_13: Reloc::rela32_13(view, object, psymval, addend); break; case elfcpp::R_SPARC_LO10: Reloc::lo10(view, object, psymval, addend); break; case elfcpp::R_SPARC_GOT10: Reloc::lo10(view, got_offset, addend); break; case elfcpp::R_SPARC_GOTDATA_OP: break; case elfcpp::R_SPARC_GOTDATA_OP_LOX10: case elfcpp::R_SPARC_GOT13: Reloc::rela32_13(view, got_offset, addend); break; case elfcpp::R_SPARC_GOTDATA_OP_HIX22: case elfcpp::R_SPARC_GOT22: Reloc::hi22(view, got_offset, addend); break; case elfcpp::R_SPARC_PC10: Reloc::pc10(view, object, psymval, addend, address); break; case elfcpp::R_SPARC_PC22: Reloc::pc22(view, object, psymval, addend, address); break; case elfcpp::R_SPARC_TLS_DTPOFF32: case elfcpp::R_SPARC_UA32: Reloc::ua32(view, object, psymval, addend); break; case elfcpp::R_SPARC_PLT64: Relocate_functions<size, big_endian>::rela64(view, object, psymval, addend); break; case elfcpp::R_SPARC_PLT32: Relocate_functions<size, big_endian>::rela32(view, object, psymval, addend); break; case elfcpp::R_SPARC_HIPLT22: Reloc::hi22(view, object, psymval, addend); break; case elfcpp::R_SPARC_LOPLT10: Reloc::lo10(view, object, psymval, addend); break; case elfcpp::R_SPARC_PCPLT32: Reloc::disp32(view, object, psymval, addend, address); break; case elfcpp::R_SPARC_PCPLT22: Reloc::pcplt22(view, object, psymval, addend, address); break; case elfcpp::R_SPARC_PCPLT10: Reloc::lo10(view, object, psymval, addend, address); break; case elfcpp::R_SPARC_64: if (!parameters->options().output_is_position_independent()) { if (rela.get_r_offset() & 0x7) { // The assembler can sometimes emit unaligned relocations // for dwarf2 cfi directives. Reloc::ua64(view, object, psymval, addend); } else Relocate_functions<size, big_endian>::rela64(view, object, psymval, addend); } break; case elfcpp::R_SPARC_OLO10: { unsigned int addend2 = rela.get_r_info() & 0xffffffff; addend2 = ((addend2 >> 8) ^ 0x800000) - 0x800000; Reloc::olo10(view, object, psymval, addend, addend2); } break; case elfcpp::R_SPARC_HH22: Reloc::hh22(view, object, psymval, addend); break; case elfcpp::R_SPARC_PC_HH22: Reloc::pc_hh22(view, object, psymval, addend, address); break; case elfcpp::R_SPARC_HM10: Reloc::hm10(view, object, psymval, addend); break; case elfcpp::R_SPARC_PC_HM10: Reloc::pc_hm10(view, object, psymval, addend, address); break; case elfcpp::R_SPARC_LM22: Reloc::hi22(view, object, psymval, addend); break; case elfcpp::R_SPARC_PC_LM22: Reloc::pcplt22(view, object, psymval, addend, address); break; case elfcpp::R_SPARC_11: Reloc::rela32_11(view, object, psymval, addend); break; case elfcpp::R_SPARC_10: Reloc::rela32_10(view, object, psymval, addend); break; case elfcpp::R_SPARC_7: Reloc::rela32_7(view, object, psymval, addend); break; case elfcpp::R_SPARC_6: Reloc::rela32_6(view, object, psymval, addend); break; case elfcpp::R_SPARC_5: Reloc::rela32_5(view, object, psymval, addend); break; case elfcpp::R_SPARC_HIX22: Reloc::hix22(view, object, psymval, addend); break; case elfcpp::R_SPARC_LOX10: Reloc::lox10(view, object, psymval, addend); break; case elfcpp::R_SPARC_H44: Reloc::h44(view, object, psymval, addend); break; case elfcpp::R_SPARC_M44: Reloc::m44(view, object, psymval, addend); break; case elfcpp::R_SPARC_L44: Reloc::l44(view, object, psymval, addend); break; case elfcpp::R_SPARC_TLS_DTPOFF64: case elfcpp::R_SPARC_UA64: Reloc::ua64(view, object, psymval, addend); break; case elfcpp::R_SPARC_UA16: Reloc::ua16(view, object, psymval, addend); break; case elfcpp::R_SPARC_TLS_GD_HI22: case elfcpp::R_SPARC_TLS_GD_LO10: case elfcpp::R_SPARC_TLS_GD_ADD: case elfcpp::R_SPARC_TLS_GD_CALL: case elfcpp::R_SPARC_TLS_LDM_HI22: case elfcpp::R_SPARC_TLS_LDM_LO10: case elfcpp::R_SPARC_TLS_LDM_ADD: case elfcpp::R_SPARC_TLS_LDM_CALL: case elfcpp::R_SPARC_TLS_LDO_HIX22: case elfcpp::R_SPARC_TLS_LDO_LOX10: case elfcpp::R_SPARC_TLS_LDO_ADD: case elfcpp::R_SPARC_TLS_IE_HI22: case elfcpp::R_SPARC_TLS_IE_LO10: case elfcpp::R_SPARC_TLS_IE_LD: case elfcpp::R_SPARC_TLS_IE_LDX: case elfcpp::R_SPARC_TLS_IE_ADD: case elfcpp::R_SPARC_TLS_LE_HIX22: case elfcpp::R_SPARC_TLS_LE_LOX10: this->relocate_tls(relinfo, target, relnum, rela, r_type, gsym, psymval, view, address, view_size); break; case elfcpp::R_SPARC_COPY: case elfcpp::R_SPARC_GLOB_DAT: case elfcpp::R_SPARC_JMP_SLOT: case elfcpp::R_SPARC_RELATIVE: // These are outstanding tls relocs, which are unexpected when // linking. case elfcpp::R_SPARC_TLS_DTPMOD64: case elfcpp::R_SPARC_TLS_DTPMOD32: case elfcpp::R_SPARC_TLS_TPOFF64: case elfcpp::R_SPARC_TLS_TPOFF32: gold_error_at_location(relinfo, relnum, rela.get_r_offset(), _("unexpected reloc %u in object file"), r_type); break; default: gold_error_at_location(relinfo, relnum, rela.get_r_offset(), _("unsupported reloc %u"), r_type); break; } return true; } // Perform a TLS relocation. template<int size, bool big_endian> inline void Target_sparc<size, big_endian>::Relocate::relocate_tls( const Relocate_info<size, big_endian>* relinfo, Target_sparc<size, big_endian>* target, size_t relnum, const elfcpp::Rela<size, big_endian>& rela, unsigned int r_type, const Sized_symbol<size>* gsym, const Symbol_value<size>* psymval, unsigned char* view, typename elfcpp::Elf_types<size>::Elf_Addr address, section_size_type) { Output_segment* tls_segment = relinfo->layout->tls_segment(); typedef Sparc_relocate_functions<size, big_endian> Reloc; const Sized_relobj_file<size, big_endian>* object = relinfo->object; typedef typename elfcpp::Swap<32, true>::Valtype Insntype; const elfcpp::Elf_Xword addend = rela.get_r_addend(); typename elfcpp::Elf_types<size>::Elf_Addr value = psymval->value(object, 0); const bool is_final = (gsym == NULL ? !parameters->options().output_is_position_independent() : gsym->final_value_is_known()); const tls::Tls_optimization optimized_type = optimize_tls_reloc(is_final, r_type); switch (r_type) { case elfcpp::R_SPARC_TLS_GD_HI22: case elfcpp::R_SPARC_TLS_GD_LO10: case elfcpp::R_SPARC_TLS_GD_ADD: case elfcpp::R_SPARC_TLS_GD_CALL: if (optimized_type == tls::TLSOPT_TO_LE) { Insntype* wv = reinterpret_cast<Insntype*>(view); Insntype val; value -= tls_segment->memsz(); switch (r_type) { case elfcpp::R_SPARC_TLS_GD_HI22: // TLS_GD_HI22 --> TLS_LE_HIX22 Reloc::hix22(view, value, addend); break; case elfcpp::R_SPARC_TLS_GD_LO10: // TLS_GD_LO10 --> TLS_LE_LOX10 Reloc::lox10(view, value, addend); break; case elfcpp::R_SPARC_TLS_GD_ADD: // add %reg1, %reg2, %reg3 --> mov %g7, %reg2, %reg3 val = elfcpp::Swap<32, true>::readval(wv); val = (val & ~0x7c000) | 0x1c000; elfcpp::Swap<32, true>::writeval(wv, val); break; case elfcpp::R_SPARC_TLS_GD_CALL: // call __tls_get_addr --> nop elfcpp::Swap<32, true>::writeval(wv, sparc_nop); break; } break; } else { unsigned int got_type = (optimized_type == tls::TLSOPT_TO_IE ? GOT_TYPE_TLS_OFFSET : GOT_TYPE_TLS_PAIR); if (gsym != NULL) { gold_assert(gsym->has_got_offset(got_type)); value = gsym->got_offset(got_type); } else { unsigned int r_sym = elfcpp::elf_r_sym<size>(rela.get_r_info()); gold_assert(object->local_has_got_offset(r_sym, got_type)); value = object->local_got_offset(r_sym, got_type); } if (optimized_type == tls::TLSOPT_TO_IE) { Insntype* wv = reinterpret_cast<Insntype*>(view); Insntype val; switch (r_type) { case elfcpp::R_SPARC_TLS_GD_HI22: // TLS_GD_HI22 --> TLS_IE_HI22 Reloc::hi22(view, value, addend); break; case elfcpp::R_SPARC_TLS_GD_LO10: // TLS_GD_LO10 --> TLS_IE_LO10 Reloc::lo10(view, value, addend); break; case elfcpp::R_SPARC_TLS_GD_ADD: // add %reg1, %reg2, %reg3 --> ld [%reg1 + %reg2], %reg3 val = elfcpp::Swap<32, true>::readval(wv); if (size == 64) val |= 0xc0580000; else val |= 0xc0000000; elfcpp::Swap<32, true>::writeval(wv, val); break; case elfcpp::R_SPARC_TLS_GD_CALL: // The compiler can put the TLS_GD_ADD instruction // into the delay slot of the call. If so, we need // to transpose the two instructions so that the // new sequence works properly. // // The test we use is if the instruction in the // delay slot is an add with destination register // equal to %o0 val = elfcpp::Swap<32, true>::readval(wv + 1); if ((val & 0x81f80000) == 0x80000000 && ((val >> 25) & 0x1f) == 0x8) { if (size == 64) val |= 0xc0580000; else val |= 0xc0000000; elfcpp::Swap<32, true>::writeval(wv, val); wv += 1; this->ignore_gd_add_ = true; } // call __tls_get_addr --> add %g7, %o0, %o0 elfcpp::Swap<32, true>::writeval(wv, 0x9001c008); break; } break; } else if (optimized_type == tls::TLSOPT_NONE) { switch (r_type) { case elfcpp::R_SPARC_TLS_GD_HI22: Reloc::hi22(view, value, addend); break; case elfcpp::R_SPARC_TLS_GD_LO10: Reloc::lo10(view, value, addend); break; case elfcpp::R_SPARC_TLS_GD_ADD: break; case elfcpp::R_SPARC_TLS_GD_CALL: { Symbol_value<size> symval; elfcpp::Elf_Xword value; Symbol* tsym; tsym = target->tls_get_addr_sym_; gold_assert(tsym); value = (target->plt_section()->address() + tsym->plt_offset()); symval.set_output_value(value); Reloc::wdisp30(view, object, &symval, addend, address); } break; } break; } } gold_error_at_location(relinfo, relnum, rela.get_r_offset(), _("unsupported reloc %u"), r_type); break; case elfcpp::R_SPARC_TLS_LDM_HI22: case elfcpp::R_SPARC_TLS_LDM_LO10: case elfcpp::R_SPARC_TLS_LDM_ADD: case elfcpp::R_SPARC_TLS_LDM_CALL: if (optimized_type == tls::TLSOPT_TO_LE) { Insntype* wv = reinterpret_cast<Insntype*>(view); switch (r_type) { case elfcpp::R_SPARC_TLS_LDM_HI22: case elfcpp::R_SPARC_TLS_LDM_LO10: case elfcpp::R_SPARC_TLS_LDM_ADD: elfcpp::Swap<32, true>::writeval(wv, sparc_nop); break; case elfcpp::R_SPARC_TLS_LDM_CALL: elfcpp::Swap<32, true>::writeval(wv, sparc_mov_g0_o0); break; } break; } else if (optimized_type == tls::TLSOPT_NONE) { // Relocate the field with the offset of the GOT entry for // the module index. unsigned int got_offset; got_offset = target->got_mod_index_entry(NULL, NULL, NULL); switch (r_type) { case elfcpp::R_SPARC_TLS_LDM_HI22: Reloc::hi22(view, got_offset, addend); break; case elfcpp::R_SPARC_TLS_LDM_LO10: Reloc::lo10(view, got_offset, addend); break; case elfcpp::R_SPARC_TLS_LDM_ADD: break; case elfcpp::R_SPARC_TLS_LDM_CALL: { Symbol_value<size> symval; elfcpp::Elf_Xword value; Symbol* tsym; tsym = target->tls_get_addr_sym_; gold_assert(tsym); value = (target->plt_section()->address() + tsym->plt_offset()); symval.set_output_value(value); Reloc::wdisp30(view, object, &symval, addend, address); } break; } break; } gold_error_at_location(relinfo, relnum, rela.get_r_offset(), _("unsupported reloc %u"), r_type); break; // These relocs can appear in debugging sections, in which case // we won't see the TLS_LDM relocs. The local_dynamic_type // field tells us this. case elfcpp::R_SPARC_TLS_LDO_HIX22: if (optimized_type == tls::TLSOPT_TO_LE) { value -= tls_segment->memsz(); Reloc::hix22(view, value, addend); } else Reloc::ldo_hix22(view, value, addend); break; case elfcpp::R_SPARC_TLS_LDO_LOX10: if (optimized_type == tls::TLSOPT_TO_LE) { value -= tls_segment->memsz(); Reloc::lox10(view, value, addend); } else Reloc::ldo_lox10(view, value, addend); break; case elfcpp::R_SPARC_TLS_LDO_ADD: if (optimized_type == tls::TLSOPT_TO_LE) { Insntype* wv = reinterpret_cast<Insntype*>(view); Insntype val; // add %reg1, %reg2, %reg3 --> add %g7, %reg2, %reg3 val = elfcpp::Swap<32, true>::readval(wv); val = (val & ~0x7c000) | 0x1c000; elfcpp::Swap<32, true>::writeval(wv, val); } break; // When optimizing IE --> LE, the only relocation that is handled // differently is R_SPARC_TLS_IE_LD, it is rewritten from // 'ld{,x} [rs1 + rs2], rd' into 'mov rs2, rd' or simply a NOP is // rs2 and rd are the same. case elfcpp::R_SPARC_TLS_IE_LD: case elfcpp::R_SPARC_TLS_IE_LDX: if (optimized_type == tls::TLSOPT_TO_LE) { Insntype* wv = reinterpret_cast<Insntype*>(view); Insntype val = elfcpp::Swap<32, true>::readval(wv); Insntype rs2 = val & 0x1f; Insntype rd = (val >> 25) & 0x1f; if (rs2 == rd) val = sparc_nop; else val = sparc_mov | (val & 0x3e00001f); elfcpp::Swap<32, true>::writeval(wv, val); } break; case elfcpp::R_SPARC_TLS_IE_HI22: case elfcpp::R_SPARC_TLS_IE_LO10: if (optimized_type == tls::TLSOPT_TO_LE) { value -= tls_segment->memsz(); switch (r_type) { case elfcpp::R_SPARC_TLS_IE_HI22: // IE_HI22 --> LE_HIX22 Reloc::hix22(view, value, addend); break; case elfcpp::R_SPARC_TLS_IE_LO10: // IE_LO10 --> LE_LOX10 Reloc::lox10(view, value, addend); break; } break; } else if (optimized_type == tls::TLSOPT_NONE) { // Relocate the field with the offset of the GOT entry for // the tp-relative offset of the symbol. if (gsym != NULL) { gold_assert(gsym->has_got_offset(GOT_TYPE_TLS_OFFSET)); value = gsym->got_offset(GOT_TYPE_TLS_OFFSET); } else { unsigned int r_sym = elfcpp::elf_r_sym<size>(rela.get_r_info()); gold_assert(object->local_has_got_offset(r_sym, GOT_TYPE_TLS_OFFSET)); value = object->local_got_offset(r_sym, GOT_TYPE_TLS_OFFSET); } switch (r_type) { case elfcpp::R_SPARC_TLS_IE_HI22: Reloc::hi22(view, value, addend); break; case elfcpp::R_SPARC_TLS_IE_LO10: Reloc::lo10(view, value, addend); break; } break; } gold_error_at_location(relinfo, relnum, rela.get_r_offset(), _("unsupported reloc %u"), r_type); break; case elfcpp::R_SPARC_TLS_IE_ADD: // This seems to be mainly so that we can find the addition // instruction if there is one. There doesn't seem to be any // actual relocation to apply. break; case elfcpp::R_SPARC_TLS_LE_HIX22: // If we're creating a shared library, a dynamic relocation will // have been created for this location, so do not apply it now. if (!parameters->options().shared()) { value -= tls_segment->memsz(); Reloc::hix22(view, value, addend); } break; case elfcpp::R_SPARC_TLS_LE_LOX10: // If we're creating a shared library, a dynamic relocation will // have been created for this location, so do not apply it now. if (!parameters->options().shared()) { value -= tls_segment->memsz(); Reloc::lox10(view, value, addend); } break; } } // Relocate section data. template<int size, bool big_endian> void Target_sparc<size, big_endian>::relocate_section( const Relocate_info<size, big_endian>* relinfo, unsigned int sh_type, const unsigned char* prelocs, size_t reloc_count, Output_section* output_section, bool needs_special_offset_handling, unsigned char* view, typename elfcpp::Elf_types<size>::Elf_Addr address, section_size_type view_size, const Reloc_symbol_changes* reloc_symbol_changes) { typedef Target_sparc<size, big_endian> Sparc; typedef typename Target_sparc<size, big_endian>::Relocate Sparc_relocate; gold_assert(sh_type == elfcpp::SHT_RELA); gold::relocate_section<size, big_endian, Sparc, elfcpp::SHT_RELA, Sparc_relocate>( relinfo, this, prelocs, reloc_count, output_section, needs_special_offset_handling, view, address, view_size, reloc_symbol_changes); } // Return the size of a relocation while scanning during a relocatable // link. template<int size, bool big_endian> unsigned int Target_sparc<size, big_endian>::Relocatable_size_for_reloc::get_size_for_reloc( unsigned int, Relobj*) { // We are always SHT_RELA, so we should never get here. gold_unreachable(); return 0; } // Scan the relocs during a relocatable link. template<int size, bool big_endian> void Target_sparc<size, big_endian>::scan_relocatable_relocs( Symbol_table* symtab, Layout* layout, Sized_relobj_file<size, big_endian>* object, unsigned int data_shndx, unsigned int sh_type, const unsigned char* prelocs, size_t reloc_count, Output_section* output_section, bool needs_special_offset_handling, size_t local_symbol_count, const unsigned char* plocal_symbols, Relocatable_relocs* rr) { gold_assert(sh_type == elfcpp::SHT_RELA); typedef gold::Default_scan_relocatable_relocs<elfcpp::SHT_RELA, Relocatable_size_for_reloc> Scan_relocatable_relocs; gold::scan_relocatable_relocs<size, big_endian, elfcpp::SHT_RELA, Scan_relocatable_relocs>( symtab, layout, object, data_shndx, prelocs, reloc_count, output_section, needs_special_offset_handling, local_symbol_count, plocal_symbols, rr); } // Relocate a section during a relocatable link. template<int size, bool big_endian> void Target_sparc<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_sparc<size, big_endian>::do_dynsym_value(const Symbol* gsym) const { gold_assert(gsym->is_from_dynobj() && gsym->has_plt_offset()); return this->plt_section()->address() + gsym->plt_offset(); } // The selector for sparc object files. template<int size, bool big_endian> class Target_selector_sparc : public Target_selector { public: Target_selector_sparc() : Target_selector(elfcpp::EM_NONE, size, big_endian, (size == 64 ? "elf64-sparc" : "elf32-sparc")) { } Target* do_recognize(int machine, int, int) { switch (size) { case 64: if (machine != elfcpp::EM_SPARCV9) return NULL; break; case 32: if (machine != elfcpp::EM_SPARC && machine != elfcpp::EM_SPARC32PLUS) return NULL; break; default: return NULL; } return this->instantiate_target(); } Target* do_instantiate_target() { return new Target_sparc<size, big_endian>(); } }; Target_selector_sparc<32, true> target_selector_sparc32; Target_selector_sparc<64, true> target_selector_sparc64; } // End anonymous namespace.
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