| // sparc.cc -- sparc target support for gold. |
| |
| // Copyright (C) 2008-2021 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), rela_ifunc_(NULL), |
| copy_relocs_(elfcpp::R_SPARC_COPY), |
| got_mod_index_offset_(-1U), tls_get_addr_sym_(NULL), |
| elf_machine_(sparc_info.machine_code), elf_flags_(0), |
| elf_flags_set_(false), register_syms_() |
| { |
| } |
| |
| // Make a new symbol table entry. |
| Sized_symbol<size>* |
| make_symbol(const char*, elfcpp::STT, Object*, unsigned int, uint64_t); |
| |
| // 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*); |
| |
| // Scan the relocs for --emit-relocs. |
| void |
| emit_relocs_scan(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_syms, |
| Relocatable_relocs* rr); |
| |
| // Emit relocations for a section. |
| void |
| relocate_relocs(const Relocate_info<size, big_endian>*, |
| unsigned int sh_type, |
| const unsigned char* prelocs, |
| size_t reloc_count, |
| Output_section* output_section, |
| typename elfcpp::Elf_types<size>::Elf_Off |
| offset_in_output_section, |
| 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 |
| { return strcmp(sym->name(), "___tls_get_addr") == 0; } |
| |
| // Return the PLT address to use for a global symbol. |
| uint64_t |
| do_plt_address_for_global(const Symbol* gsym) const |
| { return this->plt_section()->address_for_global(gsym); } |
| |
| uint64_t |
| do_plt_address_for_local(const Relobj* relobj, unsigned int symndx) const |
| { return this->plt_section()->address_for_local(relobj, symndx); } |
| |
| // Return whether there is a GOT section. |
| bool |
| has_got_section() const |
| { 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 address of the GOT. |
| uint64_t |
| got_address() const |
| { |
| if (this->got_ == NULL) |
| return 0; |
| return this->got_->address(); |
| } |
| |
| // Return the number of entries in the PLT. |
| unsigned int |
| plt_entry_count() const; |
| |
| // 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; |
| |
| protected: |
| // Make an ELF object. |
| Object* |
| do_make_elf_object(const std::string&, Input_file*, off_t, |
| const elfcpp::Ehdr<size, big_endian>& ehdr); |
| |
| void |
| do_adjust_elf_header(unsigned char* view, int len); |
| |
| 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, |
| bool is_discarded); |
| |
| 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); |
| |
| bool |
| reloc_needs_plt_for_ifunc(Sized_relobj_file<size, big_endian>*, |
| unsigned int r_type); |
| |
| // Whether we have issued an error about a non-PIC compilation. |
| bool issued_non_pic_error_; |
| }; |
| |
| // The class which implements relocation. |
| class Relocate |
| { |
| public: |
| Relocate() |
| : ignore_gd_add_(false), reloc_adjust_addr_(NULL) |
| { } |
| |
| ~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>*, unsigned int, |
| Target_sparc*, Output_section*, size_t, const unsigned char*, |
| 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); |
| |
| inline void |
| relax_call(Target_sparc<size, big_endian>* target, |
| unsigned char* view, |
| const elfcpp::Rela<size, big_endian>& rela, |
| section_size_type view_size); |
| |
| // Ignore the next relocation which should be R_SPARC_TLS_GD_ADD |
| bool ignore_gd_add_; |
| |
| // If we hit a reloc at this view address, adjust it back by 4 bytes. |
| unsigned char *reloc_adjust_addr_; |
| }; |
| |
| // Get the GOT section, creating it if necessary. |
| Output_data_got<size, big_endian>* |
| got_section(Symbol_table*, Layout*); |
| |
| // Create the PLT section. |
| void |
| make_plt_section(Symbol_table* symtab, Layout* layout); |
| |
| // Create a PLT entry for a global symbol. |
| void |
| make_plt_entry(Symbol_table*, Layout*, Symbol*); |
| |
| // Create a PLT entry for a local STT_GNU_IFUNC symbol. |
| void |
| make_local_ifunc_plt_entry(Symbol_table*, Layout*, |
| Sized_relobj_file<size, big_endian>* relobj, |
| unsigned int local_sym_index); |
| |
| // Create a GOT entry for the TLS module index. |
| unsigned int |
| got_mod_index_entry(Symbol_table* symtab, Layout* layout, |
| 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. |
| 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*); |
| |
| // Get the section to use for IFUNC relocations. |
| Reloc_section* |
| rela_ifunc_section(Layout*); |
| |
| // Copy a relocation against a global symbol. |
| void |
| copy_reloc(Symbol_table* symtab, Layout* layout, |
| Sized_relobj_file<size, big_endian>* object, |
| unsigned int shndx, Output_section* output_section, |
| Symbol* sym, const elfcpp::Rela<size, big_endian>& reloc) |
| { |
| unsigned int r_type = elfcpp::elf_r_type<size>(reloc.get_r_info()); |
| this->copy_relocs_.copy_reloc(symtab, layout, |
| symtab->get_sized_symbol<size>(sym), |
| object, shndx, output_section, |
| r_type, reloc.get_r_offset(), |
| reloc.get_r_addend(), |
| 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 |
| }; |
| |
| struct Register_symbol |
| { |
| Register_symbol() |
| : name(NULL), shndx(0), obj(NULL) |
| { } |
| const char* name; |
| unsigned int shndx; |
| Object* obj; |
| }; |
| |
| // 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_; |
| // The section to use for IFUNC relocs. |
| Reloc_section* rela_ifunc_; |
| // Relocs saved to avoid a COPY reloc. |
| Copy_relocs<elfcpp::SHT_RELA, size, big_endian> copy_relocs_; |
| // 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_; |
| // Accumulated elf machine type |
| elfcpp::Elf_Half elf_machine_; |
| // Accumulated elf header flags |
| elfcpp::Elf_Word elf_flags_; |
| // Whether elf_flags_ has been set for the first time yet |
| bool elf_flags_set_; |
| // STT_SPARC_REGISTER symbols (%g2, %g3, %g6, %g7). |
| Register_symbol register_syms_[4]; |
| }; |
| |
| 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 |
| false, // can_icf_inline_merge_sections |
| '\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) |
| false, // isolate_execinstr |
| 0, // rosegment_gap |
| elfcpp::SHN_UNDEF, // small_common_shndx |
| elfcpp::SHN_UNDEF, // large_common_shndx |
| 0, // small_common_section_flags |
| 0, // large_common_section_flags |
| NULL, // attributes_section |
| NULL, // attributes_vendor |
| "_start", // entry_symbol_name |
| 32, // hash_entry_size |
| elfcpp::SHT_PROGBITS, // unwind_section_type |
| }; |
| |
| template<> |
| Target::Target_info Target_sparc<64, true>::sparc_info = |
| { |
| 64, // size |
| true, // is_big_endian |
| elfcpp::EM_SPARCV9, // machine_code |
| true, // has_make_symbol |
| false, // has_resolve |
| false, // has_code_fill |
| true, // is_default_stack_executable |
| false, // can_icf_inline_merge_sections |
| '\0', // wrap_char |
| "/usr/lib/sparcv9/ld.so.1", // dynamic_linker |
| 0x100000, // default_text_segment_address |
| 64 * 1024, // abi_pagesize (overridable by -z max-page-size) |
| 8 * 1024, // common_pagesize (overridable by -z common-page-size) |
| false, // isolate_execinstr |
| 0, // rosegment_gap |
| elfcpp::SHN_UNDEF, // small_common_shndx |
| elfcpp::SHN_UNDEF, // large_common_shndx |
| 0, // small_common_section_flags |
| 0, // large_common_section_flags |
| NULL, // attributes_section |
| NULL, // attributes_vendor |
| "_start", // entry_symbol_name |
| 32, // hash_entry_size |
| elfcpp::SHT_PROGBITS, // unwind_section_type |
| }; |
| |
| // We have to take care here, even when operating in little-endian |
| // mode, sparc instructions are still big endian. |
| template<int size, bool big_endian> |
| class Sparc_relocate_functions |
| { |
| private: |
| // Do a simple relocation with the addend in the relocation. |
| template<int valsize> |
| static inline void |
| rela(unsigned char* view, |
| unsigned int right_shift, |
| typename elfcpp::Elf_types<valsize>::Elf_Addr dst_mask, |
| typename elfcpp::Swap<size, big_endian>::Valtype value, |
| typename elfcpp::Swap<size, big_endian>::Valtype addend) |
| { |
| typedef typename elfcpp::Swap<valsize, big_endian>::Valtype Valtype; |
| Valtype* wv = reinterpret_cast<Valtype*>(view); |
| Valtype val = elfcpp::Swap<valsize, big_endian>::readval(wv); |
| Valtype reloc = ((value + addend) >> right_shift); |
| |
| val &= ~dst_mask; |
| reloc &= dst_mask; |
| |
| elfcpp::Swap<valsize, big_endian>::writeval(wv, val | reloc); |
| } |
| |
| // Do a simple relocation using a symbol value with the addend in |
| // the relocation. |
| template<int valsize> |
| static inline void |
| rela(unsigned char* view, |
| unsigned int right_shift, |
| typename elfcpp::Elf_types<valsize>::Elf_Addr dst_mask, |
| const Sized_relobj_file<size, big_endian>* object, |
| const Symbol_value<size>* psymval, |
| typename elfcpp::Swap<valsize, big_endian>::Valtype addend) |
| { |
| typedef typename elfcpp::Swap<valsize, big_endian>::Valtype Valtype; |
| Valtype* wv = reinterpret_cast<Valtype*>(view); |
| Valtype val = elfcpp::Swap<valsize, big_endian>::readval(wv); |
| Valtype reloc = (psymval->value(object, addend) >> right_shift); |
| |
| val &= ~dst_mask; |
| reloc &= dst_mask; |
| |
| elfcpp::Swap<valsize, big_endian>::writeval(wv, val | reloc); |
| } |
| |
| // Do a simple relocation using a symbol value with the addend in |
| // the relocation, unaligned. |
| template<int valsize> |
| static inline void |
| rela_ua(unsigned char* view, |
| unsigned int right_shift, elfcpp::Elf_Xword dst_mask, |
| const Sized_relobj_file<size, big_endian>* object, |
| const Symbol_value<size>* psymval, |
| typename elfcpp::Swap<size, big_endian>::Valtype addend) |
| { |
| typedef typename elfcpp::Swap_unaligned<valsize, |
| big_endian>::Valtype Valtype; |
| unsigned char* wv = view; |
| Valtype val = elfcpp::Swap_unaligned<valsize, big_endian>::readval(wv); |
| Valtype reloc = (psymval->value(object, addend) >> right_shift); |
| |
| val &= ~dst_mask; |
| reloc &= dst_mask; |
| |
| elfcpp::Swap_unaligned<valsize, big_endian>::writeval(wv, val | reloc); |
| } |
| |
| // Do a simple PC relative relocation with a Symbol_value with the |
| // addend in the relocation. |
| template<int valsize> |
| static inline void |
| pcrela(unsigned char* view, |
| unsigned int right_shift, |
| typename elfcpp::Elf_types<valsize>::Elf_Addr dst_mask, |
| const Sized_relobj_file<size, big_endian>* object, |
| const Symbol_value<size>* psymval, |
| typename elfcpp::Swap<size, big_endian>::Valtype addend, |
| typename elfcpp::Elf_types<size>::Elf_Addr address) |
| { |
| typedef typename elfcpp::Swap<valsize, big_endian>::Valtype Valtype; |
| Valtype* wv = reinterpret_cast<Valtype*>(view); |
| Valtype val = elfcpp::Swap<valsize, big_endian>::readval(wv); |
| Valtype reloc = ((psymval->value(object, addend) - address) |
| >> right_shift); |
| |
| val &= ~dst_mask; |
| reloc &= dst_mask; |
| |
| elfcpp::Swap<valsize, big_endian>::writeval(wv, val | reloc); |
| } |
| |
| template<int valsize> |
| static inline void |
| pcrela_unaligned(unsigned char* view, |
| const Sized_relobj_file<size, big_endian>* object, |
| const Symbol_value<size>* psymval, |
| typename elfcpp::Swap<size, big_endian>::Valtype addend, |
| typename elfcpp::Elf_types<size>::Elf_Addr address) |
| { |
| typedef typename elfcpp::Swap_unaligned<valsize, |
| big_endian>::Valtype Valtype; |
| unsigned char* wv = view; |
| Valtype reloc = (psymval->value(object, addend) - address); |
| |
| elfcpp::Swap_unaligned<valsize, big_endian>::writeval(wv, reloc); |
| } |
| |
| typedef Sparc_relocate_functions<size, big_endian> This; |
| typedef Sparc_relocate_functions<size, true> This_insn; |
| |
| public: |
| // R_SPARC_WDISP30: (Symbol + Addend - Address) >> 2 |
| static inline void |
| wdisp30(unsigned char* view, |
| const Sized_relobj_file<size, big_endian>* object, |
| const Symbol_value<size>* psymval, |
| typename elfcpp::Elf_types<size>::Elf_Addr addend, |
| typename elfcpp::Elf_types<size>::Elf_Addr address) |
| { |
| This_insn::template pcrela<32>(view, 2, 0x3fffffff, object, |
| psymval, addend, address); |
| } |
| |
| // R_SPARC_WDISP22: (Symbol + Addend - Address) >> 2 |
| static inline void |
| wdisp22(unsigned char* view, |
| const Sized_relobj_file<size, big_endian>* object, |
| const Symbol_value<size>* psymval, |
| typename elfcpp::Elf_types<size>::Elf_Addr addend, |
| typename elfcpp::Elf_types<size>::Elf_Addr address) |
| { |
| This_insn::template pcrela<32>(view, 2, 0x003fffff, object, |
| psymval, addend, address); |
| } |
| |
| // R_SPARC_WDISP19: (Symbol + Addend - Address) >> 2 |
| static inline void |
| wdisp19(unsigned char* view, |
| const Sized_relobj_file<size, big_endian>* object, |
| const Symbol_value<size>* psymval, |
| typename elfcpp::Elf_types<size>::Elf_Addr addend, |
| typename elfcpp::Elf_types<size>::Elf_Addr address) |
| { |
| This_insn::template pcrela<32>(view, 2, 0x0007ffff, object, |
| psymval, addend, address); |
| } |
| |
| // R_SPARC_WDISP16: (Symbol + Addend - Address) >> 2 |
| static inline void |
| wdisp16(unsigned char* view, |
| const Sized_relobj_file<size, big_endian>* object, |
| const Symbol_value<size>* psymval, |
| typename elfcpp::Elf_types<size>::Elf_Addr addend, |
| typename elfcpp::Elf_types<size>::Elf_Addr address) |
| { |
| typedef typename elfcpp::Swap<32, true>::Valtype Valtype; |
| Valtype* wv = reinterpret_cast<Valtype*>(view); |
| Valtype val = elfcpp::Swap<32, true>::readval(wv); |
| Valtype reloc = ((psymval->value(object, addend) - address) |
| >> 2); |
| |
| // The relocation value is split between the low 14 bits, |
| // and bits 20-21. |
| val &= ~((0x3 << 20) | 0x3fff); |
| reloc = (((reloc & 0xc000) << (20 - 14)) |
| | (reloc & 0x3ffff)); |
| |
| elfcpp::Swap<32, true>::writeval(wv, val | reloc); |
| } |
| |
| // R_SPARC_WDISP10: (Symbol + Addend - Address) >> 2 |
| static inline void |
| wdisp10(unsigned char* view, |
| const Sized_relobj_file<size, big_endian>* object, |
| const Symbol_value<size>* psymval, |
| typename elfcpp::Elf_types<size>::Elf_Addr addend, |
| typename elfcpp::Elf_types<size>::Elf_Addr address) |
| { |
| typedef typename elfcpp::Swap<32, true>::Valtype Valtype; |
| Valtype* wv = reinterpret_cast<Valtype*>(view); |
| Valtype val = elfcpp::Swap<32, true>::readval(wv); |
| Valtype reloc = ((psymval->value(object, addend) - address) |
| >> 2); |
| |
| // The relocation value is split between the low bits 5-12, |
| // and high bits 19-20. |
| val &= ~((0x3 << 19) | (0xff << 5)); |
| reloc = (((reloc & 0x300) << (19 - 8)) |
| | ((reloc & 0xff) << (5 - 0))); |
| |
| elfcpp::Swap<32, true>::writeval(wv, val | reloc); |
| } |
| |
| // R_SPARC_PC22: (Symbol + Addend - Address) >> 10 |
| static inline void |
| pc22(unsigned char* view, |
| const Sized_relobj_file<size, big_endian>* object, |
| const Symbol_value<size>* psymval, |
| typename elfcpp::Elf_types<size>::Elf_Addr addend, |
| typename elfcpp::Elf_types<size>::Elf_Addr address) |
| { |
| This_insn::template pcrela<32>(view, 10, 0x003fffff, object, |
| psymval, addend, address); |
| } |
| |
| // R_SPARC_PC10: (Symbol + Addend - Address) & 0x3ff |
| static inline void |
| pc10(unsigned char* view, |
| const Sized_relobj_file<size, big_endian>* object, |
| const Symbol_value<size>* psymval, |
| typename elfcpp::Elf_types<size>::Elf_Addr addend, |
| typename elfcpp::Elf_types<size>::Elf_Addr address) |
| { |
| This_insn::template pcrela<32>(view, 0, 0x000003ff, object, |
| psymval, addend, address); |
| } |
| |
| // R_SPARC_HI22: (Symbol + Addend) >> 10 |
| static inline void |
| hi22(unsigned char* view, |
| typename elfcpp::Elf_types<size>::Elf_Addr value, |
| typename elfcpp::Elf_types<size>::Elf_Addr addend) |
| { |
| This_insn::template rela<32>(view, 10, 0x003fffff, value, addend); |
| } |
| |
| // R_SPARC_HI22: (Symbol + Addend) >> 10 |
| static inline void |
| hi22(unsigned char* view, |
| const Sized_relobj_file<size, big_endian>* object, |
| const Symbol_value<size>* psymval, |
| typename elfcpp::Elf_types<size>::Elf_Addr addend) |
| { |
| This_insn::template rela<32>(view, 10, 0x003fffff, object, psymval, addend); |
| } |
| |
| // R_SPARC_PCPLT22: (Symbol + Addend - Address) >> 10 |
| static inline void |
| pcplt22(unsigned char* view, |
| const Sized_relobj_file<size, big_endian>* object, |
| const Symbol_value<size>* psymval, |
| typename elfcpp::Elf_types<size>::Elf_Addr addend, |
| typename elfcpp::Elf_types<size>::Elf_Addr address) |
| { |
| This_insn::template pcrela<32>(view, 10, 0x003fffff, object, |
| psymval, addend, address); |
| } |
| |
| // R_SPARC_LO10: (Symbol + Addend) & 0x3ff |
| static inline void |
| lo10(unsigned char* view, |
| typename elfcpp::Elf_types<size>::Elf_Addr value, |
| typename elfcpp::Elf_types<size>::Elf_Addr addend) |
| { |
| This_insn::template rela<32>(view, 0, 0x000003ff, value, addend); |
| } |
| |
| // R_SPARC_LO10: (Symbol + Addend) & 0x3ff |
| static inline void |
| lo10(unsigned char* view, |
| const Sized_relobj_file<size, big_endian>* object, |
| const Symbol_value<size>* psymval, |
| typename elfcpp::Elf_types<size>::Elf_Addr addend) |
| { |
| This_insn::template rela<32>(view, 0, 0x000003ff, object, psymval, addend); |
| } |
| |
| // R_SPARC_LO10: (Symbol + Addend) & 0x3ff |
| static inline void |
| lo10(unsigned char* view, |
| const Sized_relobj_file<size, big_endian>* object, |
| const Symbol_value<size>* psymval, |
| typename elfcpp::Elf_types<size>::Elf_Addr addend, |
| typename elfcpp::Elf_types<size>::Elf_Addr address) |
| { |
| This_insn::template pcrela<32>(view, 0, 0x000003ff, object, |
| psymval, addend, address); |
| } |
| |
| // R_SPARC_OLO10: ((Symbol + Addend) & 0x3ff) + Addend2 |
| static inline void |
| olo10(unsigned char* view, |
| const Sized_relobj_file<size, big_endian>* object, |
| const Symbol_value<size>* psymval, |
| typename elfcpp::Elf_types<size>::Elf_Addr addend, |
| typename elfcpp::Elf_types<size>::Elf_Addr addend2) |
| { |
| typedef typename elfcpp::Swap<32, true>::Valtype Valtype; |
| Valtype* wv = reinterpret_cast<Valtype*>(view); |
| Valtype val = elfcpp::Swap<32, true>::readval(wv); |
| Valtype reloc = psymval->value(object, addend); |
| |
| val &= ~0x1fff; |
| reloc &= 0x3ff; |
| reloc += addend2; |
| reloc &= 0x1fff; |
| |
| elfcpp::Swap<32, true>::writeval(wv, val | reloc); |
| } |
| |
| // R_SPARC_22: (Symbol + Addend) |
| static inline void |
| rela32_22(unsigned char* view, |
| const Sized_relobj_file<size, big_endian>* object, |
| const Symbol_value<size>* psymval, |
| typename elfcpp::Elf_types<size>::Elf_Addr addend) |
| { |
| This_insn::template rela<32>(view, 0, 0x003fffff, object, psymval, addend); |
| } |
| |
| // R_SPARC_13: (Symbol + Addend) |
| static inline void |
| rela32_13(unsigned char* view, |
| typename elfcpp::Elf_types<size>::Elf_Addr value, |
| typename elfcpp::Elf_types<size>::Elf_Addr addend) |
| { |
| This_insn::template rela<32>(view, 0, 0x00001fff, value, addend); |
| } |
| |
| // R_SPARC_13: (Symbol + Addend) |
| static inline void |
| rela32_13(unsigned char* view, |
| const Sized_relobj_file<size, big_endian>* object, |
| const Symbol_value<size>* psymval, |
| typename elfcpp::Elf_types<size>::Elf_Addr addend) |
| { |
| This_insn::template rela<32>(view, 0, 0x00001fff, object, psymval, addend); |
| } |
| |
| // R_SPARC_UA16: (Symbol + Addend) |
| static inline void |
| ua16(unsigned char* view, |
| const Sized_relobj_file<size, big_endian>* object, |
| const Symbol_value<size>* psymval, |
| typename elfcpp::Elf_types<size>::Elf_Addr addend) |
| { |
| This::template rela_ua<16>(view, 0, 0xffff, object, psymval, addend); |
| } |
| |
| // R_SPARC_UA32: (Symbol + Addend) |
| static inline void |
| ua32(unsigned char* view, |
| const Sized_relobj_file<size, big_endian>* object, |
| const Symbol_value<size>* psymval, |
| typename elfcpp::Elf_types<size>::Elf_Addr addend) |
| { |
| This::template rela_ua<32>(view, 0, 0xffffffff, object, psymval, addend); |
| } |
| |
| // R_SPARC_UA64: (Symbol + Addend) |
| static inline void |
| ua64(unsigned char* view, |
| const Sized_relobj_file<size, big_endian>* object, |
| const Symbol_value<size>* psymval, |
| typename elfcpp::Elf_types<size>::Elf_Addr addend) |
| { |
| This::template rela_ua<64>(view, 0, ~(elfcpp::Elf_Xword) 0, |
| object, psymval, addend); |
| } |
| |
| // R_SPARC_DISP8: (Symbol + Addend - Address) |
| static inline void |
| disp8(unsigned char* view, |
| const Sized_relobj_file<size, big_endian>* object, |
| const Symbol_value<size>* psymval, |
| typename elfcpp::Elf_types<size>::Elf_Addr addend, |
| typename elfcpp::Elf_types<size>::Elf_Addr address) |
| { |
| This::template pcrela_unaligned<8>(view, object, psymval, |
| addend, address); |
| } |
| |
| // R_SPARC_DISP16: (Symbol + Addend - Address) |
| static inline void |
| disp16(unsigned char* view, |
| const Sized_relobj_file<size, big_endian>* object, |
| const Symbol_value<size>* psymval, |
| typename elfcpp::Elf_types<size>::Elf_Addr addend, |
| typename elfcpp::Elf_types<size>::Elf_Addr address) |
| { |
| This::template pcrela_unaligned<16>(view, object, psymval, |
| addend, address); |
| } |
| |
| // R_SPARC_DISP32: (Symbol + Addend - Address) |
| static inline void |
| disp32(unsigned char* view, |
| const Sized_relobj_file<size, big_endian>* object, |
| const Symbol_value<size>* psymval, |
| typename elfcpp::Elf_types<size>::Elf_Addr addend, |
| typename elfcpp::Elf_types<size>::Elf_Addr address) |
| { |
| This::template pcrela_unaligned<32>(view, object, psymval, |
| addend, address); |
| } |
| |
| // R_SPARC_DISP64: (Symbol + Addend - Address) |
| static inline void |
| disp64(unsigned char* view, |
| const Sized_relobj_file<size, big_endian>* object, |
| const Symbol_value<size>* psymval, |
| elfcpp::Elf_Xword addend, |
| typename elfcpp::Elf_types<size>::Elf_Addr address) |
| { |
| This::template pcrela_unaligned<64>(view, object, psymval, |
| addend, address); |
| } |
| |
| // R_SPARC_H34: (Symbol + Addend) >> 12 |
| static inline void |
| h34(unsigned char* view, |
| const Sized_relobj_file<size, big_endian>* object, |
| const Symbol_value<size>* psymval, |
| typename elfcpp::Elf_types<size>::Elf_Addr addend) |
| { |
| This_insn::template rela<32>(view, 12, 0x003fffff, object, psymval, addend); |
| } |
| |
| // R_SPARC_H44: (Symbol + Addend) >> 22 |
| static inline void |
| h44(unsigned char* view, |
| const Sized_relobj_file<size, big_endian>* object, |
| const Symbol_value<size>* psymval, |
| typename elfcpp::Elf_types<size>::Elf_Addr addend) |
| { |
| This_insn::template rela<32>(view, 22, 0x003fffff, object, psymval, addend); |
| } |
| |
| // R_SPARC_M44: ((Symbol + Addend) >> 12) & 0x3ff |
| static inline void |
| m44(unsigned char* view, |
| const Sized_relobj_file<size, big_endian>* object, |
| const Symbol_value<size>* psymval, |
| typename elfcpp::Elf_types<size>::Elf_Addr addend) |
| { |
| This_insn::template rela<32>(view, 12, 0x000003ff, object, psymval, addend); |
| } |
| |
| // R_SPARC_L44: (Symbol + Addend) & 0xfff |
| static inline void |
| l44(unsigned char* view, |
| const Sized_relobj_file<size, big_endian>* object, |
| const Symbol_value<size>* psymval, |
| typename elfcpp::Elf_types<size>::Elf_Addr addend) |
| { |
| This_insn::template rela<32>(view, 0, 0x00000fff, object, psymval, addend); |
| } |
| |
| // R_SPARC_HH22: (Symbol + Addend) >> 42 |
| static inline void |
| hh22(unsigned char* view, |
| const Sized_relobj_file<size, big_endian>* object, |
| const Symbol_value<size>* psymval, |
| typename elfcpp::Elf_types<size>::Elf_Addr addend) |
| { |
| This_insn::template rela<32>(view, 42, 0x003fffff, object, psymval, addend); |
| } |
| |
| // R_SPARC_PC_HH22: (Symbol + Addend - Address) >> 42 |
| static inline void |
| pc_hh22(unsigned char* view, |
| const Sized_relobj_file<size, big_endian>* object, |
| const Symbol_value<size>* psymval, |
| typename elfcpp::Elf_types<size>::Elf_Addr addend, |
| typename elfcpp::Elf_types<size>::Elf_Addr address) |
| { |
| This_insn::template pcrela<32>(view, 42, 0x003fffff, object, |
| psymval, addend, address); |
| } |
| |
| // R_SPARC_HM10: ((Symbol + Addend) >> 32) & 0x3ff |
| static inline void |
| hm10(unsigned char* view, |
| const Sized_relobj_file<size, big_endian>* object, |
| const Symbol_value<size>* psymval, |
| typename elfcpp::Elf_types<size>::Elf_Addr addend) |
| { |
| This_insn::template rela<32>(view, 32, 0x000003ff, object, psymval, addend); |
| } |
| |
| // R_SPARC_PC_HM10: ((Symbol + Addend - Address) >> 32) & 0x3ff |
| static inline void |
| pc_hm10(unsigned char* view, |
| const Sized_relobj_file<size, big_endian>* object, |
| const Symbol_value<size>* psymval, |
| typename elfcpp::Elf_types<size>::Elf_Addr addend, |
| typename elfcpp::Elf_types<size>::Elf_Addr address) |
| { |
| This_insn::template pcrela<32>(view, 32, 0x000003ff, object, |
| psymval, addend, address); |
| } |
| |
| // R_SPARC_11: (Symbol + Addend) |
| static inline void |
| rela32_11(unsigned char* view, |
| const Sized_relobj_file<size, big_endian>* object, |
| const Symbol_value<size>* psymval, |
| typename elfcpp::Elf_types<size>::Elf_Addr addend) |
| { |
| This_insn::template rela<32>(view, 0, 0x000007ff, object, psymval, addend); |
| } |
| |
| // R_SPARC_10: (Symbol + Addend) |
| static inline void |
| rela32_10(unsigned char* view, |
| const Sized_relobj_file<size, big_endian>* object, |
| const Symbol_value<size>* psymval, |
| typename elfcpp::Elf_types<size>::Elf_Addr addend) |
| { |
| This_insn::template rela<32>(view, 0, 0x000003ff, object, psymval, addend); |
| } |
| |
| // R_SPARC_7: (Symbol + Addend) |
| static inline void |
| rela32_7(unsigned char* view, |
| const Sized_relobj_file<size, big_endian>* object, |
| const Symbol_value<size>* psymval, |
| typename elfcpp::Elf_types<size>::Elf_Addr addend) |
| { |
| This_insn::template rela<32>(view, 0, 0x0000007f, object, psymval, addend); |
| } |
| |
| // R_SPARC_6: (Symbol + Addend) |
| static inline void |
| rela32_6(unsigned char* view, |
| const Sized_relobj_file<size, big_endian>* object, |
| const Symbol_value<size>* psymval, |
| typename elfcpp::Elf_types<size>::Elf_Addr addend) |
| { |
| This_insn::template rela<32>(view, 0, 0x0000003f, object, psymval, addend); |
| } |
| |
| // R_SPARC_5: (Symbol + Addend) |
| static inline void |
| rela32_5(unsigned char* view, |
| const Sized_relobj_file<size, big_endian>* object, |
| const Symbol_value<size>* psymval, |
| typename elfcpp::Elf_types<size>::Elf_Addr addend) |
| { |
| This_insn::template rela<32>(view, 0, 0x0000001f, object, psymval, addend); |
| } |
| |
| // R_SPARC_TLS_LDO_HIX22: @dtpoff(Symbol + Addend) >> 10 |
| static inline void |
| ldo_hix22(unsigned char* view, |
| typename elfcpp::Elf_types<size>::Elf_Addr value, |
| typename elfcpp::Elf_types<size>::Elf_Addr addend) |
| { |
| This_insn::hi22(view, value, addend); |
| } |
| |
| // R_SPARC_TLS_LDO_LOX10: @dtpoff(Symbol + Addend) & 0x3ff |
| static inline void |
| ldo_lox10(unsigned char* view, |
| typename elfcpp::Elf_types<size>::Elf_Addr value, |
| typename elfcpp::Elf_types<size>::Elf_Addr addend) |
| { |
| typedef typename elfcpp::Swap<32, true>::Valtype Valtype; |
| Valtype* wv = reinterpret_cast<Valtype*>(view); |
| Valtype val = elfcpp::Swap<32, true>::readval(wv); |
| Valtype reloc = (value + addend); |
| |
| val &= ~0x1fff; |
| reloc &= 0x3ff; |
| |
| elfcpp::Swap<32, true>::writeval(wv, val | reloc); |
| } |
| |
| // R_SPARC_TLS_LE_HIX22: (@tpoff(Symbol + Addend) ^ 0xffffffffffffffff) >> 10 |
| static inline void |
| hix22(unsigned char* view, |
| typename elfcpp::Elf_types<size>::Elf_Addr value, |
| typename elfcpp::Elf_types<size>::Elf_Addr addend) |
| { |
| typedef typename elfcpp::Swap<32, true>::Valtype Valtype; |
| Valtype* wv = reinterpret_cast<Valtype*>(view); |
| Valtype val = elfcpp::Swap<32, true>::readval(wv); |
| Valtype reloc = (value + addend); |
| |
| val &= ~0x3fffff; |
| |
| reloc ^= ~(Valtype)0; |
| reloc >>= 10; |
| |
| reloc &= 0x3fffff; |
| |
| elfcpp::Swap<32, true>::writeval(wv, val | reloc); |
| } |
| |
| // R_SPARC_GOTDATA_OP_HIX22: @gdopoff(Symbol + Addend) >> 10 |
| static inline void |
| gdop_hix22(unsigned char* view, |
| typename elfcpp::Elf_types<size>::Elf_Addr value) |
| { |
| typedef typename elfcpp::Swap<32, true>::Valtype Valtype; |
| Valtype* wv = reinterpret_cast<Valtype*>(view); |
| Valtype val = elfcpp::Swap<32, true>::readval(wv); |
| int32_t reloc = static_cast<int32_t>(value); |
| |
| val &= ~0x3fffff; |
| |
| if (reloc < 0) |
| reloc ^= ~static_cast<int32_t>(0); |
| reloc >>= 10; |
| |
| reloc &= 0x3fffff; |
| |
| elfcpp::Swap<32, true>::writeval(wv, val | reloc); |
| } |
| |
| // R_SPARC_HIX22: ((Symbol + Addend) ^ 0xffffffffffffffff) >> 10 |
| static inline void |
| hix22(unsigned char* view, |
| const Sized_relobj_file<size, big_endian>* object, |
| const Symbol_value<size>* psymval, |
| typename elfcpp::Elf_types<size>::Elf_Addr addend) |
| { |
| typedef typename elfcpp::Swap<32, true>::Valtype Valtype; |
| Valtype* wv = reinterpret_cast<Valtype*>(view); |
| Valtype val = elfcpp::Swap<32, true>::readval(wv); |
| Valtype reloc = psymval->value(object, addend); |
| |
| val &= ~0x3fffff; |
| |
| reloc ^= ~(Valtype)0; |
| reloc >>= 10; |
| |
| reloc &= 0x3fffff; |
| |
| elfcpp::Swap<32, true>::writeval(wv, val | reloc); |
| } |
| |
| |
| // R_SPARC_TLS_LE_LOX10: (@tpoff(Symbol + Addend) & 0x3ff) | 0x1c00 |
| static inline void |
| lox10(unsigned char* view, |
| typename elfcpp::Elf_types<size>::Elf_Addr value, |
| typename elfcpp::Elf_types<size>::Elf_Addr addend) |
| { |
| typedef typename elfcpp::Swap<32, true>::Valtype Valtype; |
| Valtype* wv = reinterpret_cast<Valtype*>(view); |
| Valtype val = elfcpp::Swap<32, true>::readval(wv); |
| Valtype reloc = (value + addend); |
| |
| val &= ~0x1fff; |
| reloc &= 0x3ff; |
| reloc |= 0x1c00; |
| |
| elfcpp::Swap<32, true>::writeval(wv, val | reloc); |
| } |
| |
| // R_SPARC_GOTDATA_OP_LOX10: (@gdopoff(Symbol + Addend) & 0x3ff) | 0x1c00 |
| static inline void |
| gdop_lox10(unsigned char* view, |
| typename elfcpp::Elf_types<size>::Elf_Addr value) |
| { |
| typedef typename elfcpp::Swap<32, true>::Valtype Valtype; |
| Valtype* wv = reinterpret_cast<Valtype*>(view); |
| Valtype val = elfcpp::Swap<32, true>::readval(wv); |
| int32_t reloc = static_cast<int32_t>(value); |
| |
| if (reloc < 0) |
| reloc = (reloc & 0x3ff) | 0x1c00; |
| else |
| reloc = (reloc & 0x3ff); |
| |
| val &= ~0x1fff; |
| elfcpp::Swap<32, true>::writeval(wv, val | reloc); |
| } |
| |
| // R_SPARC_LOX10: ((Symbol + Addend) & 0x3ff) | 0x1c00 |
| static inline void |
| lox10(unsigned char* view, |
| const Sized_relobj_file<size, big_endian>* object, |
| const Symbol_value<size>* psymval, |
| typename elfcpp::Elf_types<size>::Elf_Addr addend) |
| { |
| typedef typename elfcpp::Swap<32, true>::Valtype Valtype; |
| Valtype* wv = reinterpret_cast<Valtype*>(view); |
| Valtype val = elfcpp::Swap<32, true>::readval(wv); |
| Valtype reloc = psymval->value(object, addend); |
| |
| val &= ~0x1fff; |
| reloc &= 0x3ff; |
| reloc |= 0x1c00; |
| |
| elfcpp::Swap<32, true>::writeval(wv, val | reloc); |
| } |
| }; |
| |
| // Get the GOT section, creating it if necessary. |
| |
| template<int size, bool big_endian> |
| Output_data_got<size, big_endian>* |
| Target_sparc<size, big_endian>::got_section(Symbol_table* symtab, |
| Layout* layout) |
| { |
| if (this->got_ == NULL) |
| { |
| gold_assert(symtab != NULL && layout != NULL); |
| |
| this->got_ = new Output_data_got<size, big_endian>(); |
| |
| layout->add_output_section_data(".got", elfcpp::SHT_PROGBITS, |
| (elfcpp::SHF_ALLOC |
| | elfcpp::SHF_WRITE), |
| this->got_, ORDER_RELRO, true); |
| |
| // Define _GLOBAL_OFFSET_TABLE_ at the start of the .got section. |
| symtab->define_in_output_data("_GLOBAL_OFFSET_TABLE_", NULL, |
| Symbol_table::PREDEFINED, |
| this->got_, |
| 0, 0, elfcpp::STT_OBJECT, |
| elfcpp::STB_LOCAL, |
| elfcpp::STV_HIDDEN, 0, |
| false, false); |
| } |
| |
| return this->got_; |
| } |
| |
| // Get the dynamic reloc section, creating it if necessary. |
| |
| template<int size, bool big_endian> |
| typename Target_sparc<size, big_endian>::Reloc_section* |
| Target_sparc<size, big_endian>::rela_dyn_section(Layout* layout) |
| { |
| if (this->rela_dyn_ == NULL) |
| { |
| gold_assert(layout != NULL); |
| this->rela_dyn_ = new Reloc_section(parameters->options().combreloc()); |
| layout->add_output_section_data(".rela.dyn", elfcpp::SHT_RELA, |
| elfcpp::SHF_ALLOC, this->rela_dyn_, |
| ORDER_DYNAMIC_RELOCS, false); |
| } |
| return this->rela_dyn_; |
| } |
| |
| // Get the section to use for IFUNC relocs, creating it if |
| // necessary. These go in .rela.dyn, but only after all other dynamic |
| // relocations. They need to follow the other dynamic relocations so |
| // that they can refer to global variables initialized by those |
| // relocs. |
| |
| template<int size, bool big_endian> |
| typename Target_sparc<size, big_endian>::Reloc_section* |
| Target_sparc<size, big_endian>::rela_ifunc_section(Layout* layout) |
| { |
| if (this->rela_ifunc_ == NULL) |
| { |
| // Make sure we have already created the dynamic reloc section. |
| this->rela_dyn_section(layout); |
| this->rela_ifunc_ = new Reloc_section(false); |
| layout->add_output_section_data(".rela.dyn", elfcpp::SHT_RELA, |
| elfcpp::SHF_ALLOC, this->rela_ifunc_, |
| ORDER_DYNAMIC_RELOCS, false); |
| gold_assert(this->rela_dyn_->output_section() |
| == this->rela_ifunc_->output_section()); |
| } |
| return this->rela_ifunc_; |
| } |
| |
| // A class to handle the PLT data. |
| |
| template<int size, bool big_endian> |
| class Output_data_plt_sparc : public Output_section_data |
| { |
| public: |
| typedef Output_data_reloc<elfcpp::SHT_RELA, true, |
| size, big_endian> Reloc_section; |
| |
| Output_data_plt_sparc(Layout*); |
| |
| // Add an entry to the PLT. |
| void add_entry(Symbol_table* symtab, Layout* layout, Symbol* gsym); |
| |
| // Add an entry to the PLT for a local STT_GNU_IFUNC symbol. |
| unsigned int |
| add_local_ifunc_entry(Symbol_table*, Layout*, |
| Sized_relobj_file<size, big_endian>* relobj, |
| unsigned int local_sym_index); |
| |
| // Return the .rela.plt section data. |
| const Reloc_section* rel_plt() const |
| { |
| return this->rel_; |
| } |
| |
| // Return where the IFUNC relocations should go. |
| Reloc_section* |
| rela_ifunc(Symbol_table*, Layout*); |
| |
| void |
| emit_pending_ifunc_relocs(); |
| |
| // Return whether we created a section for IFUNC relocations. |
| bool |
| has_ifunc_section() const |
| { return this->ifunc_rel_ != NULL; } |
| |
| // Return the number of PLT entries. |
| unsigned int |
| entry_count() const |
| { return this->count_ + this->ifunc_count_; } |
| |
| // Return the offset of the first non-reserved PLT entry. |
| static unsigned int |
| first_plt_entry_offset() |
| { return 4 * base_plt_entry_size; } |
| |
| // Return the size of a PLT entry. |
| static unsigned int |
| get_plt_entry_size() |
| { return base_plt_entry_size; } |
| |
| // Return the PLT address to use for a global symbol. |
| uint64_t |
| address_for_global(const Symbol*); |
| |
| // Return the PLT address to use for a local symbol. |
| uint64_t |
| address_for_local(const Relobj*, unsigned int symndx); |
| |
| protected: |
| void do_adjust_output_section(Output_section* os); |
| |
| // Write to a map file. |
| void |
| do_print_to_mapfile(Mapfile* mapfile) const |
| { mapfile->print_output_data(this, _("** PLT")); } |
| |
| private: |
| // The size of an entry in the PLT. |
| static const int base_plt_entry_size = (size == 32 ? 12 : 32); |
| |
| static const unsigned int plt_entries_per_block = 160; |
| static const unsigned int plt_insn_chunk_size = 24; |
| static const unsigned int plt_pointer_chunk_size = 8; |
| static const unsigned int plt_block_size = |
| (plt_entries_per_block |
| * (plt_insn_chunk_size + plt_pointer_chunk_size)); |
| |
| section_offset_type |
| plt_index_to_offset(unsigned int index) |
| { |
| section_offset_type offset; |
| |
| if (size == 32 || index < 32768) |
| offset = index * base_plt_entry_size; |
| else |
| { |
| unsigned int ext_index = index - 32768; |
| |
| offset = (32768 * base_plt_entry_size) |
| + ((ext_index / plt_entries_per_block) |
| * plt_block_size) |
| + ((ext_index % plt_entries_per_block) |
| * plt_insn_chunk_size); |
| } |
| return offset; |
| } |
| |
| // Set the final size. |
| void |
| set_final_data_size() |
| { |
| unsigned int full_count = this->entry_count() + 4; |
| unsigned int extra = (size == 32 ? 4 : 0); |
| section_offset_type sz = plt_index_to_offset(full_count) + extra; |
| |
| return this->set_data_size(sz); |
| } |
| |
| // Write out the PLT data. |
| void |
| do_write(Output_file*); |
| |
| struct Global_ifunc |
| { |
| Reloc_section* rel; |
| Symbol* gsym; |
| unsigned int plt_index; |
| }; |
| |
| struct Local_ifunc |
| { |
| Reloc_section* rel; |
| Sized_relobj_file<size, big_endian>* object; |
| unsigned int local_sym_index; |
| unsigned int plt_index; |
| }; |
| |
| // The reloc section. |
| Reloc_section* rel_; |
| // The IFUNC relocations, if necessary. These must follow the |
| // regular relocations. |
| Reloc_section* ifunc_rel_; |
| // The number of PLT entries. |
| unsigned int count_; |
| // The number of PLT entries for IFUNC symbols. |
| unsigned int ifunc_count_; |
| // Global STT_GNU_IFUNC symbols. |
| std::vector<Global_ifunc> global_ifuncs_; |
| // Local STT_GNU_IFUNC symbols. |
| std::vector<Local_ifunc> local_ifuncs_; |
| }; |
| |
| // Define the constants as required by C++ standard. |
| |
| template<int size, bool big_endian> |
| const int Output_data_plt_sparc<size, big_endian>::base_plt_entry_size; |
| |
| template<int size, bool big_endian> |
| const unsigned int |
| Output_data_plt_sparc<size, big_endian>::plt_entries_per_block; |
| |
| template<int size, bool big_endian> |
| const unsigned int Output_data_plt_sparc<size, big_endian>::plt_insn_chunk_size; |
| |
| template<int size, bool big_endian> |
| const unsigned int |
| Output_data_plt_sparc<size, big_endian>::plt_pointer_chunk_size; |
| |
| template<int size, bool big_endian> |
| const unsigned int Output_data_plt_sparc<size, big_endian>::plt_block_size; |
| |
| // Create the PLT section. The ordinary .got section is an argument, |
| // since we need to refer to the start. |
| |
| template<int size, bool big_endian> |
| Output_data_plt_sparc<size, big_endian>::Output_data_plt_sparc(Layout* layout) |
| : Output_section_data(size == 32 ? 4 : 8), ifunc_rel_(NULL), |
| count_(0), ifunc_count_(0), global_ifuncs_(), local_ifuncs_() |
| { |
| this->rel_ = new Reloc_section(false); |
| layout->add_output_section_data(".rela.plt", elfcpp::SHT_RELA, |
| elfcpp::SHF_ALLOC, this->rel_, |
| ORDER_DYNAMIC_PLT_RELOCS, false); |
| } |
| |
| template<int size, bool big_endian> |
| void |
| Output_data_plt_sparc<size, big_endian>::do_adjust_output_section(Output_section* os) |
| { |
| os->set_entsize(0); |
| } |
| |
| // Add an entry to the PLT. |
| |
| template<int size, bool big_endian> |
| void |
| Output_data_plt_sparc<size, big_endian>::add_entry(Symbol_table* symtab, |
| Layout* layout, |
| Symbol* gsym) |
| { |
| gold_assert(!gsym->has_plt_offset()); |
| |
| section_offset_type plt_offset; |
| unsigned int index; |
| |
| if (gsym->type() == elfcpp::STT_GNU_IFUNC |
| && gsym->can_use_relative_reloc(false)) |
| { |
| index = this->ifunc_count_; |
| plt_offset = plt_index_to_offset(index); |
| gsym->set_plt_offset(plt_offset); |
| ++this->ifunc_count_; |
| Reloc_section* rel = this->rela_ifunc(symtab, layout); |
| |
| struct Global_ifunc gi; |
| gi.rel = rel; |
| gi.gsym = gsym; |
| gi.plt_index = index; |
| this->global_ifuncs_.push_back(gi); |
| } |
| else |
| { |
| plt_offset = plt_index_to_offset(this->count_ + 4); |
| gsym->set_plt_offset(plt_offset); |
| ++this->count_; |
| gsym->set_needs_dynsym_entry(); |
| this->rel_->add_global(gsym, elfcpp::R_SPARC_JMP_SLOT, this, |
| plt_offset, 0); |
| } |
| |
| // Note that we don't need to save the symbol. The contents of the |
| // PLT are independent of which symbols are used. The symbols only |
| // appear in the relocations. |
| } |
| |
| template<int size, bool big_endian> |
| unsigned int |
| Output_data_plt_sparc<size, big_endian>::add_local_ifunc_entry( |
| Symbol_table* symtab, |
| Layout* layout, |
| Sized_relobj_file<size, big_endian>* relobj, |
| unsigned int local_sym_index) |
| { |
| unsigned int index = this->ifunc_count_; |
| section_offset_type plt_offset; |
| |
| plt_offset = plt_index_to_offset(index); |
| ++this->ifunc_count_; |
| |
| Reloc_section* rel = this->rela_ifunc(symtab, layout); |
| |
| struct Local_ifunc li; |
| li.rel = rel; |
| li.object = relobj; |
| li.local_sym_index = local_sym_index; |
| li.plt_index = index; |
| this->local_ifuncs_.push_back(li); |
| |
| return plt_offset; |
| } |
| |
| // Emit any pending IFUNC plt relocations. |
| |
| template<int size, bool big_endian> |
| void |
| Output_data_plt_sparc<size, big_endian>::emit_pending_ifunc_relocs() |
| { |
| // Emit any pending IFUNC relocs. |
| for (typename std::vector<Global_ifunc>::const_iterator p = |
| this->global_ifuncs_.begin(); |
| p != this->global_ifuncs_.end(); |
| ++p) |
| { |
| section_offset_type plt_offset; |
| unsigned int index; |
| |
| index = this->count_ + p->plt_index + 4; |
| plt_offset = this->plt_index_to_offset(index); |
| p->rel->add_symbolless_global_addend(p->gsym, elfcpp::R_SPARC_JMP_IREL, |
| this, plt_offset, 0); |
| } |
| |
| for (typename std::vector<Local_ifunc>::const_iterator p = |
| this->local_ifuncs_.begin(); |
| p != this->local_ifuncs_.end(); |
| ++p) |
| { |
| section_offset_type plt_offset; |
| unsigned int index; |
| |
| index = this->count_ + p->plt_index + 4; |
| plt_offset = this->plt_index_to_offset(index); |
| p->rel->add_symbolless_local_addend(p->object, p->local_sym_index, |
| elfcpp::R_SPARC_JMP_IREL, |
| this, plt_offset, 0); |
| } |
| } |
| |
| // Return where the IFUNC relocations should go in the PLT. These |
| // follow the non-IFUNC relocations. |
| |
| template<int size, bool big_endian> |
| typename Output_data_plt_sparc<size, big_endian>::Reloc_section* |
| Output_data_plt_sparc<size, big_endian>::rela_ifunc( |
| Symbol_table* symtab, |
| Layout* layout) |
| { |
| if (this->ifunc_rel_ == NULL) |
| { |
| this->ifunc_rel_ = new Reloc_section(false); |
| layout->add_output_section_data(".rela.plt", elfcpp::SHT_RELA, |
| elfcpp::SHF_ALLOC, this->ifunc_rel_, |
| ORDER_DYNAMIC_PLT_RELOCS, false); |
| gold_assert(this->ifunc_rel_->output_section() |
| == this->rel_->output_section()); |
| |
| if (parameters->doing_static_link()) |
| { |
| // A statically linked executable will only have a .rel.plt |
| // section to hold R_SPARC_IRELATIVE and R_SPARC_JMP_IREL |
| // relocs for STT_GNU_IFUNC symbols. The library will use |
| // these symbols to locate the IRELATIVE and JMP_IREL relocs |
| // at program startup time. |
| symtab->define_in_output_data("__rela_iplt_start", NULL, |
| Symbol_table::PREDEFINED, |
| this->ifunc_rel_, 0, 0, |
| elfcpp::STT_NOTYPE, elfcpp::STB_GLOBAL, |
| elfcpp::STV_HIDDEN, 0, false, true); |
| symtab->define_in_output_data("__rela_iplt_end", NULL, |
| Symbol_table::PREDEFINED, |
| this->ifunc_rel_, 0, 0, |
| elfcpp::STT_NOTYPE, elfcpp::STB_GLOBAL, |
| elfcpp::STV_HIDDEN, 0, true, true); |
| } |
| } |
| return this->ifunc_rel_; |
| } |
| |
| // Return the PLT address to use for a global symbol. |
| |
| template<int size, bool big_endian> |
| uint64_t |
| Output_data_plt_sparc<size, big_endian>::address_for_global(const Symbol* gsym) |
| { |
| uint64_t offset = 0; |
| if (gsym->type() == elfcpp::STT_GNU_IFUNC |
| && gsym->can_use_relative_reloc(false)) |
| offset = plt_index_to_offset(this->count_ + 4); |
| return this->address() + offset + gsym->plt_offset(); |
| } |
| |
| // Return the PLT address to use for a local symbol. These are always |
| // IRELATIVE relocs. |
| |
| template<int size, bool big_endian> |
| uint64_t |
| Output_data_plt_sparc<size, big_endian>::address_for_local( |
| const Relobj* object, |
| unsigned int r_sym) |
| { |
| return (this->address() |
| + plt_index_to_offset(this->count_ + 4) |
| + object->local_plt_offset(r_sym)); |
| } |
| |
| static const unsigned int sparc_nop = 0x01000000; |
| static const unsigned int sparc_sethi_g1 = 0x03000000; |
| static const unsigned int sparc_branch_always = 0x30800000; |
| static const unsigned int sparc_branch_always_pt = 0x30680000; |
| static const unsigned int sparc_mov = 0x80100000; |
| static const unsigned int sparc_mov_g0_o0 = 0x90100000; |
| static const unsigned int sparc_mov_o7_g5 = 0x8a10000f; |
| static const unsigned int sparc_call_plus_8 = 0x40000002; |
| static const unsigned int sparc_ldx_o7_imm_g1 = 0xc25be000; |
| static const unsigned int sparc_jmpl_o7_g1_g1 = 0x83c3c001; |
| static const unsigned int sparc_mov_g5_o7 = 0x9e100005; |
| |
| // Write out the PLT. |
| |
| template<int size, bool big_endian> |
| void |
| Output_data_plt_sparc<size, big_endian>::do_write(Output_file* of) |
| { |
| const off_t offset = this->offset(); |
| const section_size_type oview_size = |
| convert_to_section_size_type(this->data_size()); |
| unsigned char* const oview = of->get_output_view(offset, oview_size); |
| unsigned char* pov = oview; |
| |
| memset(pov, 0, base_plt_entry_size * 4); |
| pov += this->first_plt_entry_offset(); |
| |
| unsigned int plt_offset = base_plt_entry_size * 4; |
| const unsigned int count = this->entry_count(); |
| |
| if (size == 64) |
| { |
| unsigned int limit; |
| |
| limit = (count > 32768 ? 32768 : count); |
| |
| for (unsigned int i = 0; i < limit; ++i) |
| { |
| elfcpp::Swap<32, true>::writeval(pov + 0x00, |
| sparc_sethi_g1 + plt_offset); |
| elfcpp::Swap<32, true>::writeval(pov + 0x04, |
| sparc_branch_always_pt + |
| (((base_plt_entry_size - |
| (plt_offset + 4)) >> 2) & |
| 0x7ffff)); |
| elfcpp::Swap<32, true>::writeval(pov + 0x08, sparc_nop); |
| elfcpp::Swap<32, true>::writeval(pov + 0x0c, sparc_nop); |
| elfcpp::Swap<32, true>::writeval(pov + 0x10, sparc_nop); |
| elfcpp::Swap<32, true>::writeval(pov + 0x14, sparc_nop); |
| elfcpp::Swap<32, true>::writeval(pov + 0x18, sparc_nop); |
| elfcpp::Swap<32, true>::writeval(pov + 0x1c, sparc_nop); |
| |
| pov += base_plt_entry_size; |
| plt_offset += base_plt_entry_size; |
| } |
| |
| if (count > 32768) |
| { |
| unsigned int ext_cnt = count - 32768; |
| unsigned int blks = ext_cnt / plt_entries_per_block; |
| |
| for (unsigned int i = 0; i < blks; ++i) |
| { |
| unsigned int data_off = (plt_entries_per_block |
| * plt_insn_chunk_size) - 4; |
| |
| for (unsigned int j = 0; j < plt_entries_per_block; ++j) |
| { |
| elfcpp::Swap<32, true>::writeval(pov + 0x00, |
| sparc_mov_o7_g5); |
| elfcpp::Swap<32, true>::writeval(pov + 0x04, |
| sparc_call_plus_8); |
| elfcpp::Swap<32, true>::writeval(pov + 0x08, |
| sparc_nop); |
| elfcpp::Swap<32, true>::writeval(pov + 0x0c, |
| sparc_ldx_o7_imm_g1 + |
| (data_off & 0x1fff)); |
| elfcpp::Swap<32, true>::writeval(pov + 0x10, |
| sparc_jmpl_o7_g1_g1); |
| elfcpp::Swap<32, true>::writeval(pov + 0x14, |
| sparc_mov_g5_o7); |
| |
| elfcpp::Swap<64, big_endian>::writeval( |
| pov + 0x4 + data_off, |
| (elfcpp::Elf_Xword) (oview - (pov + 0x04))); |
| |
| pov += plt_insn_chunk_size; |
| data_off -= 16; |
| } |
| } |
| |
| unsigned int sub_blk_cnt = ext_cnt % plt_entries_per_block; |
| for (unsigned int i = 0; i < sub_blk_cnt; ++i) |
| { |
| unsigned int data_off = (sub_blk_cnt |
| * plt_insn_chunk_size) - 4; |
| |
| for (unsigned int j = 0; j < plt_entries_per_block; ++j) |
| { |
| elfcpp::Swap<32, true>::writeval(pov + 0x00, |
| sparc_mov_o7_g5); |
| elfcpp::Swap<32, true>::writeval(pov + 0x04, |
| sparc_call_plus_8); |
| elfcpp::Swap<32, true>::writeval(pov + 0x08, |
| sparc_nop); |
| elfcpp::Swap<32, true>::writeval(pov + 0x0c, |
| sparc_ldx_o7_imm_g1 + |
| (data_off & 0x1fff)); |
| elfcpp::Swap<32, true>::writeval(pov + 0x10, |
| sparc_jmpl_o7_g1_g1); |
| elfcpp::Swap<32, true>::writeval(pov + 0x14, |
| sparc_mov_g5_o7); |
| |
| elfcpp::Swap<64, big_endian>::writeval( |
| pov + 0x4 + data_off, |
| (elfcpp::Elf_Xword) (oview - (pov + 0x04))); |
| |
| pov += plt_insn_chunk_size; |
| data_off -= 16; |
| } |
| } |
| } |
| } |
| else |
| { |
| for (unsigned int i = 0; i < count; ++i) |
| { |
| elfcpp::Swap<32, true>::writeval(pov + 0x00, |
| sparc_sethi_g1 + plt_offset); |
| elfcpp::Swap<32, true>::writeval(pov + 0x04, |
| sparc_branch_always + |
| (((- (plt_offset + 4)) >> 2) & |
| 0x003fffff)); |
| elfcpp::Swap<32, true>::writeval(pov + 0x08, sparc_nop); |
| |
| pov += base_plt_entry_size; |
| plt_offset += base_plt_entry_size; |
| } |
| |
| elfcpp::Swap<32, true>::writeval(pov, sparc_nop); |
| pov += 4; |
| } |
| |
| gold_assert(static_cast<section_size_type>(pov - oview) == oview_size); |
| |
| of->write_output_view(offset, oview_size, oview); |
| } |
| |
| // Create the PLT section. |
| |
| template<int size, bool big_endian> |
| void |
| Target_sparc<size, big_endian>::make_plt_section(Symbol_table* symtab, |
| Layout* layout) |
| { |
| // Create the GOT sections first. |
| this->got_section(symtab, layout); |
| |
| // Ensure that .rela.dyn always appears before .rela.plt This is |
| // necessary due to how, on Sparc and some other targets, .rela.dyn |
| // needs to include .rela.plt in it's range. |
| this->rela_dyn_section(layout); |
| |
| this->plt_ = new Output_data_plt_sparc<size, big_endian>(layout); |
| layout->add_output_section_data(".plt", elfcpp::SHT_PROGBITS, |
| (elfcpp::SHF_ALLOC |
| | elfcpp::SHF_EXECINSTR |
| | elfcpp::SHF_WRITE), |
| this->plt_, ORDER_NON_RELRO_FIRST, false); |
| |
| // Define _PROCEDURE_LINKAGE_TABLE_ at the start of the .plt section. |
| symtab->define_in_output_data("_PROCEDURE_LINKAGE_TABLE_", NULL, |
| Symbol_table::PREDEFINED, |
| this->plt_, |
| 0, 0, elfcpp::STT_OBJECT, |
| elfcpp::STB_LOCAL, |
| elfcpp::STV_HIDDEN, 0, |
| false, false); |
| } |
| |
| // Create a PLT entry for a global symbol. |
| |
| template<int size, bool big_endian> |
| void |
| Target_sparc<size, big_endian>::make_plt_entry(Symbol_table* symtab, |
| Layout* layout, |
| Symbol* gsym) |
| { |
| if (gsym->has_plt_offset()) |
| return; |
| |
| if (this->plt_ == NULL) |
| this->make_plt_section(symtab, layout); |
| |
| this->plt_->add_entry(symtab, layout, gsym); |
| } |
| |
| // Make a PLT entry for a local STT_GNU_IFUNC symbol. |
| |
| template<int size, bool big_endian> |
| void |
| Target_sparc<size, big_endian>::make_local_ifunc_plt_entry( |
| Symbol_table* symtab, |
| Layout* layout, |
| Sized_relobj_file<size, big_endian>* relobj, |
| unsigned int local_sym_index) |
| { |
| if (relobj->local_has_plt_offset(local_sym_index)) |
| return; |
| if (this->plt_ == NULL) |
| this->make_plt_section(symtab, layout); |
| unsigned int plt_offset = this->plt_->add_local_ifunc_entry(symtab, layout, |
| relobj, |
| local_sym_index); |
| relobj->set_local_plt_offset(local_sym_index, plt_offset); |
| } |
| |
| // Return the number of entries in the PLT. |
| |
| template<int size, bool big_endian> |
| unsigned int |
| Target_sparc<size, big_endian>::plt_entry_count() const |
| { |
| if (this->plt_ == NULL) |
| return 0; |
| return this->plt_->entry_count(); |
| } |
| |
| // Return the offset of the first non-reserved PLT entry. |
| |
| template<int size, bool big_endian> |
| unsigned int |
| Target_sparc<size, big_endian>::first_plt_entry_offset() const |
| { |
| return Output_data_plt_sparc<size, big_endian>::first_plt_entry_offset(); |
| } |
| |
| // Return the size of each PLT entry. |
| |
| template<int size, bool big_endian> |
| unsigned int |
| Target_sparc<size, big_endian>::plt_entry_size() const |
| { |
| return Output_data_plt_sparc<size, big_endian>::get_plt_entry_size(); |
| } |
| |
| // Create a GOT entry for the TLS module index. |
| |
| template<int size, bool big_endian> |
| unsigned int |
| Target_sparc<size, big_endian>::got_mod_index_entry( |
| Symbol_table* symtab, |
| Layout* layout, |
| Sized_relobj_file<size, big_endian>* object) |
| { |
| if (this->got_mod_index_offset_ == -1U) |
| { |
| gold_assert(symtab != NULL && layout != NULL && object != NULL); |
| Reloc_section* rela_dyn = this->rela_dyn_section(layout); |
| Output_data_got<size, big_endian>* got; |
| unsigned int got_offset; |
| |
| got = this->got_section(symtab, layout); |
| got_offset = got->add_constant(0); |
| rela_dyn->add_local(object, 0, |
| (size == 64 ? |
| elfcpp::R_SPARC_TLS_DTPMOD64 : |
| elfcpp::R_SPARC_TLS_DTPMOD32), got, |
| got_offset, 0); |
| got->add_constant(0); |
| this->got_mod_index_offset_ = got_offset; |
| } |
| return this->got_mod_index_offset_; |
| } |
| |
| // Optimize the TLS relocation type based on what we know about the |
| // symbol. IS_FINAL is true if the final address of this symbol is |
| // known at link time. |
| |
| static tls::Tls_optimization |
| optimize_tls_reloc(bool is_final, int r_type) |
| { |
| // If we are generating a shared library, then we can't do anything |
| // in the linker. |
| if (parameters->options().shared()) |
| return tls::TLSOPT_NONE; |
| |
| switch (r_type) |
| { |
| case elfcpp::R_SPARC_TLS_GD_HI22: // Global-dynamic |
| case elfcpp::R_SPARC_TLS_GD_LO10: |
| case elfcpp::R_SPARC_TLS_GD_ADD: |
| case elfcpp::R_SPARC_TLS_GD_CALL: |
| // These are General-Dynamic which permits fully general TLS |
| // access. Since we know that we are generating an executable, |
| // we can convert this to Initial-Exec. If we also know that |
| // this is a local symbol, we can further switch to Local-Exec. |
| if (is_final) |
| return tls::TLSOPT_TO_LE; |
| return tls::TLSOPT_TO_IE; |
| |
| case elfcpp::R_SPARC_TLS_LDM_HI22: // Local-dynamic |
| case elfcpp::R_SPARC_TLS_LDM_LO10: |
| case elfcpp::R_SPARC_TLS_LDM_ADD: |
| case elfcpp::R_SPARC_TLS_LDM_CALL: |
| // This is Local-Dynamic, which refers to a local symbol in the |
| // dynamic TLS block. Since we know that we generating an |
| // executable, we can switch to Local-Exec. |
| return tls::TLSOPT_TO_LE; |
| |
| case elfcpp::R_SPARC_TLS_LDO_HIX22: // Alternate local-dynamic |
| case elfcpp::R_SPARC_TLS_LDO_LOX10: |
| case elfcpp::R_SPARC_TLS_LDO_ADD: |
| // Another type of Local-Dynamic relocation. |
| return tls::TLSOPT_TO_LE; |
| |
| case elfcpp::R_SPARC_TLS_IE_HI22: // Initial-exec |
| case elfcpp::R_SPARC_TLS_IE_LO10: |
| case elfcpp::R_SPARC_TLS_IE_LD: |
| case elfcpp::R_SPARC_TLS_IE_LDX: |
| case elfcpp::R_SPARC_TLS_IE_ADD: |
| // These are Initial-Exec relocs which get the thread offset |
| // from the GOT. If we know that we are linking against the |
| // local symbol, we can switch to Local-Exec, which links the |
| // thread offset into the instruction. |
| if (is_final) |
| return tls::TLSOPT_TO_LE; |
| return tls::TLSOPT_NONE; |
| |
| case elfcpp::R_SPARC_TLS_LE_HIX22: // Local-exec |
| case elfcpp::R_SPARC_TLS_LE_LOX10: |
| // When we already have Local-Exec, there is nothing further we |
| // can do. |
| return tls::TLSOPT_NONE; |
| |
| default: |
| gold_unreachable(); |
| } |
| } |
| |
| // Get the Reference_flags for a particular relocation. |
| |
| template<int size, bool big_endian> |
| int |
| Target_sparc<size, big_endian>::Scan::get_reference_flags(unsigned int r_type) |
| { |
| r_type &= 0xff; |
| switch (r_type) |
| { |
| case elfcpp::R_SPARC_NONE: |
| case elfcpp::R_SPARC_REGISTER: |
| case elfcpp::R_SPARC_GNU_VTINHERIT: |
| case elfcpp::R_SPARC_GNU_VTENTRY: |
| // No symbol reference. |
| return 0; |
| |
| case elfcpp::R_SPARC_UA64: |
| case elfcpp::R_SPARC_64: |
| case elfcpp::R_SPARC_HIX22: |
| case elfcpp::R_SPARC_LOX10: |
| case elfcpp::R_SPARC_H34: |
| case elfcpp::R_SPARC_H44: |
| case elfcpp::R_SPARC_M44: |
| case elfcpp::R_SPARC_L44: |
| case elfcpp::R_SPARC_HH22: |
| case elfcpp::R_SPARC_HM10: |
| case elfcpp::R_SPARC_LM22: |
| case elfcpp::R_SPARC_HI22: |
| case elfcpp::R_SPARC_LO10: |
| case elfcpp::R_SPARC_OLO10: |
| case elfcpp::R_SPARC_UA32: |
| case elfcpp::R_SPARC_32: |
| case elfcpp::R_SPARC_UA16: |
| case elfcpp::R_SPARC_16: |
| case elfcpp::R_SPARC_11: |
| case elfcpp::R_SPARC_10: |
| case elfcpp::R_SPARC_8: |
| case elfcpp::R_SPARC_7: |
| case elfcpp::R_SPARC_6: |
| case elfcpp::R_SPARC_5: |
| return Symbol::ABSOLUTE_REF; |
| |
| case elfcpp::R_SPARC_DISP8: |
| case elfcpp::R_SPARC_DISP16: |
| case elfcpp::R_SPARC_DISP32: |
| case elfcpp::R_SPARC_DISP64: |
| case elfcpp::R_SPARC_PC_HH22: |
| case elfcpp::R_SPARC_PC_HM10: |
| case elfcpp::R_SPARC_PC_LM22: |
| case elfcpp::R_SPARC_PC10: |
| case elfcpp::R_SPARC_PC22: |
| case elfcpp::R_SPARC_WDISP30: |
| case elfcpp::R_SPARC_WDISP22: |
| case elfcpp::R_SPARC_WDISP19: |
| case elfcpp::R_SPARC_WDISP16: |
| case elfcpp::R_SPARC_WDISP10: |
| return Symbol::RELATIVE_REF; |
| |
| case elfcpp::R_SPARC_PLT64: |
| case elfcpp::R_SPARC_PLT32: |
| case elfcpp::R_SPARC_HIPLT22: |
| case elfcpp::R_SPARC_LOPLT10: |
| case elfcpp::R_SPARC_PCPLT10: |
| return Symbol::FUNCTION_CALL | Symbol::ABSOLUTE_REF; |
| |
| case elfcpp::R_SPARC_PCPLT32: |
| case elfcpp::R_SPARC_PCPLT22: |
| case elfcpp::R_SPARC_WPLT30: |
| return Symbol::FUNCTION_CALL | Symbol::RELATIVE_REF; |
| |
| case elfcpp::R_SPARC_GOTDATA_OP: |
| case elfcpp::R_SPARC_GOTDATA_OP_HIX22: |
| case elfcpp::R_SPARC_GOTDATA_OP_LOX10: |
| case elfcpp::R_SPARC_GOT10: |
| case elfcpp::R_SPARC_GOT13: |
| case elfcpp::R_SPARC_GOT22: |
| // Absolute in GOT. |
| return Symbol::ABSOLUTE_REF; |
| |
| case elfcpp::R_SPARC_TLS_GD_HI22: // Global-dynamic |
| case elfcpp::R_SPARC_TLS_GD_LO10: |
| case elfcpp::R_SPARC_TLS_GD_ADD: |
| case elfcpp::R_SPARC_TLS_GD_CALL: |
| case elfcpp::R_SPARC_TLS_LDM_HI22: // Local-dynamic |
| case elfcpp::R_SPARC_TLS_LDM_LO10: |
| case elfcpp::R_SPARC_TLS_LDM_ADD: |
| case elfcpp::R_SPARC_TLS_LDM_CALL: |
| case elfcpp::R_SPARC_TLS_LDO_HIX22: // Alternate local-dynamic |
| case elfcpp::R_SPARC_TLS_LDO_LOX10: |
| case elfcpp::R_SPARC_TLS_LDO_ADD: |
| case elfcpp::R_SPARC_TLS_LE_HIX22: |
| case elfcpp::R_SPARC_TLS_LE_LOX10: |
| case elfcpp::R_SPARC_TLS_IE_HI22: // Initial-exec |
| case elfcpp::R_SPARC_TLS_IE_LO10: |
| case elfcpp::R_SPARC_TLS_IE_LD: |
| case elfcpp::R_SPARC_TLS_IE_LDX: |
| case elfcpp::R_SPARC_TLS_IE_ADD: |
| return Symbol::TLS_REF; |
| |
| case elfcpp::R_SPARC_COPY: |
| case elfcpp::R_SPARC_GLOB_DAT: |
| case elfcpp::R_SPARC_JMP_SLOT: |
| case elfcpp::R_SPARC_JMP_IREL: |
| case elfcpp::R_SPARC_RELATIVE: |
| case elfcpp::R_SPARC_IRELATIVE: |
| case elfcpp::R_SPARC_TLS_DTPMOD64: |
| case elfcpp::R_SPARC_TLS_DTPMOD32: |
| case elfcpp::R_SPARC_TLS_DTPOFF64: |
| case elfcpp::R_SPARC_TLS_DTPOFF32: |
| case elfcpp::R_SPARC_TLS_TPOFF64: |
| case elfcpp::R_SPARC_TLS_TPOFF32: |
| default: |
| // Not expected. We will give an error later. |
| return 0; |
| } |
| } |
| |
| // Generate a PLT entry slot for a call to __tls_get_addr |
| template<int size, bool big_endian> |
| void |
| Target_sparc<size, big_endian>::Scan::generate_tls_call(Symbol_table* symtab, |
| Layout* layout, |
| Target_sparc<size, big_endian>* target) |
| { |
| Symbol* gsym = target->tls_get_addr_sym(symtab); |
| |
| target->make_plt_entry(symtab, layout, gsym); |
| } |
| |
| // Report an unsupported relocation against a local symbol. |
| |
| template<int size, bool big_endian> |
| void |
| Target_sparc<size, big_endian>::Scan::unsupported_reloc_local( |
| Sized_relobj_file<size, big_endian>* object, |
| unsigned int r_type) |
| { |
| gold_error(_("%s: unsupported reloc %u against local symbol"), |
| object->name().c_str(), r_type); |
| } |
| |
| // We are about to emit a dynamic relocation of type R_TYPE. If the |
| // dynamic linker does not support it, issue an error. |
| |
| template<int size, bool big_endian> |
| void |
| Target_sparc<size, big_endian>::Scan::check_non_pic(Relobj* object, unsigned int r_type) |
| { |
| gold_assert(r_type != elfcpp::R_SPARC_NONE); |
| |
| if (size == 64) |
| { |
| switch (r_type) |
| { |
| // These are the relocation types supported by glibc for sparc 64-bit. |
| case elfcpp::R_SPARC_RELATIVE: |
| case elfcpp::R_SPARC_IRELATIVE: |
| case elfcpp::R_SPARC_COPY: |
| case elfcpp::R_SPARC_32: |
| case elfcpp::R_SPARC_64: |
| case elfcpp::R_SPARC_GLOB_DAT: |
| case elfcpp::R_SPARC_JMP_SLOT: |
| case elfcpp::R_SPARC_JMP_IREL: |
| case elfcpp::R_SPARC_TLS_DTPMOD64: |
| case elfcpp::R_SPARC_TLS_DTPOFF64: |
| case elfcpp::R_SPARC_TLS_TPOFF64: |
| case elfcpp::R_SPARC_TLS_LE_HIX22: |
| case elfcpp::R_SPARC_TLS_LE_LOX10: |
| case elfcpp::R_SPARC_8: |
| case elfcpp::R_SPARC_16: |
| case elfcpp::R_SPARC_DISP8: |
| case elfcpp::R_SPARC_DISP16: |
| case elfcpp::R_SPARC_DISP32: |
| case elfcpp::R_SPARC_WDISP30: |
| case elfcpp::R_SPARC_LO10: |
| case elfcpp::R_SPARC_HI22: |
| case elfcpp::R_SPARC_OLO10: |
| case elfcpp::R_SPARC_H34: |
| case elfcpp::R_SPARC_H44: |
| case elfcpp::R_SPARC_M44: |
| case elfcpp::R_SPARC_L44: |
| case elfcpp::R_SPARC_HH22: |
| case elfcpp::R_SPARC_HM10: |
| case elfcpp::R_SPARC_LM22: |
| case elfcpp::R_SPARC_UA16: |
| case elfcpp::R_SPARC_UA32: |
| case elfcpp::R_SPARC_UA64: |
| return; |
| |
| default: |
| break; |
| } |
| } |
| else |
| { |
| switch (r_type) |
| { |
| // These are the relocation types supported by glibc for sparc 32-bit. |
| case elfcpp::R_SPARC_RELATIVE: |
| case elfcpp::R_SPARC_IRELATIVE: |
| case elfcpp::R_SPARC_COPY: |
| case elfcpp::R_SPARC_GLOB_DAT: |
| case elfcpp::R_SPARC_32: |
| case elfcpp::R_SPARC_JMP_SLOT: |
| case elfcpp::R_SPARC_JMP_IREL: |
| case elfcpp::R_SPARC_TLS_DTPMOD32: |
| case elfcpp::R_SPARC_TLS_DTPOFF32: |
| case elfcpp::R_SPARC_TLS_TPOFF32: |
| case elfcpp::R_SPARC_TLS_LE_HIX22: |
| case elfcpp::R_SPARC_TLS_LE_LOX10: |
| case elfcpp::R_SPARC_8: |
| case elfcpp::R_SPARC_16: |
| case elfcpp::R_SPARC_DISP8: |
| case elfcpp::R_SPARC_DISP16: |
| case elfcpp::R_SPARC_DISP32: |
| case elfcpp::R_SPARC_LO10: |
| case elfcpp::R_SPARC_WDISP30: |
| case elfcpp::R_SPARC_HI22: |
| case elfcpp::R_SPARC_UA16: |
| case elfcpp::R_SPARC_UA32: |
| return; |
| |
| default: |
| break; |
| } |
| } |
| |
| // This prevents us from issuing more than one error per reloc |
| // section. But we can still wind up issuing more than one |
| // error per object file. |
| if (this->issued_non_pic_error_) |
| return; |
| gold_assert(parameters->options().output_is_position_independent()); |
| object->error(_("requires unsupported dynamic reloc; " |
| "recompile with -fPIC")); |
| this->issued_non_pic_error_ = true; |
| return; |
| } |
| |
| // Return whether we need to make a PLT entry for a relocation of the |
| // given type against a STT_GNU_IFUNC symbol. |
| |
| template<int size, bool big_endian> |
| bool |
| Target_sparc<size, big_endian>::Scan::reloc_needs_plt_for_ifunc( |
| Sized_relobj_file<size, big_endian>* object, |
| unsigned int r_type) |
| { |
| int flags = Scan::get_reference_flags(r_type); |
| if (flags & Symbol::TLS_REF) |
| gold_error(_("%s: unsupported TLS reloc %u for IFUNC symbol"), |
| object->name().c_str(), r_type); |
| return flags != 0; |
| } |
| |
| // Scan a relocation for a local symbol. |
| |
| template<int size, bool big_endian> |
| inline void |
| Target_sparc<size, big_endian>::Scan::local( |
| Symbol_table* symtab, |
| Layout* layout, |
| Target_sparc<size, big_endian>* target, |
| Sized_relobj_file<size, big_endian>* object, |
| unsigned int data_shndx, |
| Output_section* output_section, |
| const elfcpp::Rela<size, big_endian>& reloc, |
| unsigned int r_type, |
| const elfcpp::Sym<size, big_endian>& lsym, |
| bool is_discarded) |
| { |
| if (is_discarded) |
| return; |
| |
| bool is_ifunc = lsym.get_st_type() == elfcpp::STT_GNU_IFUNC; |
| unsigned int orig_r_type = r_type; |
| r_type &= 0xff; |
| |
| if (is_ifunc |
| && this->reloc_needs_plt_for_ifunc(object, r_type)) |
| { |
| unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); |
| target->make_local_ifunc_plt_entry(symtab, layout, object, r_sym); |
| } |
| |
| switch (r_type) |
| { |
| case elfcpp::R_SPARC_NONE: |
| case elfcpp::R_SPARC_REGISTER: |
| case elfcpp::R_SPARC_GNU_VTINHERIT: |
| case elfcpp::R_SPARC_GNU_VTENTRY: |
| break; |
| |
| case elfcpp::R_SPARC_64: |
| case elfcpp::R_SPARC_32: |
| // If building a shared library (or a position-independent |
| // executable), we need to create a dynamic relocation for |
| // this location. The relocation applied at link time will |
| // apply the link-time value, so we flag the location with |
| // an R_SPARC_RELATIVE relocation so the dynamic loader can |
| // relocate it easily. |
| if (parameters->options().output_is_position_independent() |
| && ((size == 64 && r_type == elfcpp::R_SPARC_64) |
| || (size == 32 && r_type == elfcpp::R_SPARC_32))) |
| { |
| Reloc_section* rela_dyn = target->rela_dyn_section(layout); |
| unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); |
| rela_dyn->add_local_relative(object, r_sym, elfcpp::R_SPARC_RELATIVE, |
| output_section, data_shndx, |
| reloc.get_r_offset(), |
| reloc.get_r_addend(), is_ifunc); |
| break; |
| } |
| // Fall through. |
| |
| case elfcpp::R_SPARC_HIX22: |
| case elfcpp::R_SPARC_LOX10: |
| case elfcpp::R_SPARC_H34: |
| case elfcpp::R_SPARC_H44: |
| case elfcpp::R_SPARC_M44: |
| case elfcpp::R_SPARC_L44: |
| case elfcpp::R_SPARC_HH22: |
| case elfcpp::R_SPARC_HM10: |
| case elfcpp::R_SPARC_LM22: |
| case elfcpp::R_SPARC_UA64: |
| case elfcpp::R_SPARC_UA32: |
| case elfcpp::R_SPARC_UA16: |
| case elfcpp::R_SPARC_HI22: |
| case elfcpp::R_SPARC_LO10: |
| case elfcpp::R_SPARC_OLO10: |
| case elfcpp::R_SPARC_16: |
| case elfcpp::R_SPARC_11: |
| case elfcpp::R_SPARC_10: |
| case elfcpp::R_SPARC_8: |
| case elfcpp::R_SPARC_7: |
| case elfcpp::R_SPARC_6: |
| case elfcpp::R_SPARC_5: |
| // If building a shared library (or a position-independent |
| // executable), we need to create a dynamic relocation for |
| // this location. |
| if (parameters->options().output_is_position_independent()) |
| { |
| Reloc_section* rela_dyn = target->rela_dyn_section(layout); |
| unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); |
| |
| check_non_pic(object, r_type); |
| if (lsym.get_st_type() != elfcpp::STT_SECTION) |
| { |
| rela_dyn->add_local(object, r_sym, orig_r_type, output_section, |
| data_shndx, reloc.get_r_offset(), |
| reloc.get_r_addend()); |
| } |
| else |
| { |
| gold_assert(lsym.get_st_value() == 0); |
| rela_dyn->add_symbolless_local_addend(object, r_sym, orig_r_type, |
| output_section, data_shndx, |
| reloc.get_r_offset(), |
| reloc.get_r_addend()); |
| } |
| } |
| break; |
| |
| case elfcpp::R_SPARC_WDISP30: |
| case elfcpp::R_SPARC_WPLT30: |
| case elfcpp::R_SPARC_WDISP22: |
| case elfcpp::R_SPARC_WDISP19: |
| case elfcpp::R_SPARC_WDISP16: |
| case elfcpp::R_SPARC_WDISP10: |
| case elfcpp::R_SPARC_DISP8: |
| case elfcpp::R_SPARC_DISP16: |
| case elfcpp::R_SPARC_DISP32: |
| case elfcpp::R_SPARC_DISP64: |
| case elfcpp::R_SPARC_PC10: |
| case elfcpp::R_SPARC_PC22: |
| break; |
| |
| case elfcpp::R_SPARC_GOTDATA_OP: |
| case elfcpp::R_SPARC_GOTDATA_OP_HIX22: |
| case elfcpp::R_SPARC_GOTDATA_OP_LOX10: |
| // We will optimize this into a GOT relative relocation |
| // and code transform the GOT load into an addition. |
| break; |
| |
| case elfcpp::R_SPARC_GOT10: |
| case elfcpp::R_SPARC_GOT13: |
| case elfcpp::R_SPARC_GOT22: |
| { |
| // The symbol requires a GOT entry. |
| Output_data_got<size, big_endian>* got; |
| unsigned int r_sym; |
| |
| got = target->got_section(symtab, layout); |
| r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); |
| |
| // If we are generating a shared object, we need to add a |
| // dynamic relocation for this symbol's GOT entry. |
| if (parameters->options().output_is_position_independent()) |
| { |
| if (!object->local_has_got_offset(r_sym, GOT_TYPE_STANDARD)) |
| { |
| Reloc_section* rela_dyn = target->rela_dyn_section(layout); |
| unsigned int off = got->add_constant(0); |
| object->set_local_got_offset(r_sym, GOT_TYPE_STANDARD, off); |
| rela_dyn->add_local_relative(object, r_sym, |
| elfcpp::R_SPARC_RELATIVE, |
| got, off, 0, is_ifunc); |
| } |
| } |
| else |
| got->add_local(object, r_sym, GOT_TYPE_STANDARD); |
| } |
| break; |
| |
| // These are initial TLS relocs, which are expected when |
| // linking. |
| case elfcpp::R_SPARC_TLS_GD_HI22: // Global-dynamic |
| case elfcpp::R_SPARC_TLS_GD_LO10: |
| case elfcpp::R_SPARC_TLS_GD_ADD: |
| case elfcpp::R_SPARC_TLS_GD_CALL: |
| case elfcpp::R_SPARC_TLS_LDM_HI22 : // Local-dynamic |
| case elfcpp::R_SPARC_TLS_LDM_LO10: |
| case elfcpp::R_SPARC_TLS_LDM_ADD: |
| case elfcpp::R_SPARC_TLS_LDM_CALL: |
| case elfcpp::R_SPARC_TLS_LDO_HIX22: // Alternate local-dynamic |
| case elfcpp::R_SPARC_TLS_LDO_LOX10: |
| case elfcpp::R_SPARC_TLS_LDO_ADD: |
| case elfcpp::R_SPARC_TLS_IE_HI22: // Initial-exec |
| case elfcpp::R_SPARC_TLS_IE_LO10: |
| case elfcpp::R_SPARC_TLS_IE_LD: |
| case elfcpp::R_SPARC_TLS_IE_LDX: |
| case elfcpp::R_SPARC_TLS_IE_ADD: |
| case elfcpp::R_SPARC_TLS_LE_HIX22: // Local-exec |
| case elfcpp::R_SPARC_TLS_LE_LOX10: |
| { |
| bool output_is_shared = parameters->options().shared(); |
| const tls::Tls_optimization optimized_type |
| = optimize_tls_reloc(!output_is_shared, r_type); |
| switch (r_type) |
| { |
| case elfcpp::R_SPARC_TLS_GD_HI22: // Global-dynamic |
| case elfcpp::R_SPARC_TLS_GD_LO10: |
| case elfcpp::R_SPARC_TLS_GD_ADD: |
| case elfcpp::R_SPARC_TLS_GD_CALL: |
| if (optimized_type == tls::TLSOPT_NONE) |
| { |
| // Create a pair of GOT entries for the module index and |
| // dtv-relative offset. |
| Output_data_got<size, big_endian>* got |
| = target->got_section(symtab, layout); |
| unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); |
| unsigned int shndx = lsym.get_st_shndx(); |
| bool is_ordinary; |
| shndx = object->adjust_sym_shndx(r_sym, shndx, &is_ordinary); |
| if (!is_ordinary) |
| object->error(_("local symbol %u has bad shndx %u"), |
| r_sym, shndx); |
| else |
| got->add_local_pair_with_rel(object, r_sym, |
| lsym.get_st_shndx(), |
| GOT_TYPE_TLS_PAIR, |
| target->rela_dyn_section(layout), |
| (size == 64 |
| ? elfcpp::R_SPARC_TLS_DTPMOD64 |
| : elfcpp::R_SPARC_TLS_DTPMOD32)); |
| if (r_type == elfcpp::R_SPARC_TLS_GD_CALL) |
| generate_tls_call(symtab, layout, target); |
| } |
| else if (optimized_type != tls::TLSOPT_TO_LE) |
| unsupported_reloc_local(object, r_type); |
| break; |
| |
| case elfcpp::R_SPARC_TLS_LDM_HI22 : // Local-dynamic |
| case elfcpp::R_SPARC_TLS_LDM_LO10: |
| case elfcpp::R_SPARC_TLS_LDM_ADD: |
| case elfcpp::R_SPARC_TLS_LDM_CALL: |
| if (optimized_type == tls::TLSOPT_NONE) |
| { |
| // Create a GOT entry for the module index. |
| target->got_mod_index_entry(symtab, layout, object); |
| |
| if (r_type == elfcpp::R_SPARC_TLS_LDM_CALL) |
| generate_tls_call(symtab, layout, target); |
| } |
| else if (optimized_type != tls::TLSOPT_TO_LE) |
| unsupported_reloc_local(object, r_type); |
| break; |
| |
| case elfcpp::R_SPARC_TLS_LDO_HIX22: // Alternate local-dynamic |
| case elfcpp::R_SPARC_TLS_LDO_LOX10: |
| case elfcpp::R_SPARC_TLS_LDO_ADD: |
| break; |
| |
| case elfcpp::R_SPARC_TLS_IE_HI22: // Initial-exec |
| case elfcpp::R_SPARC_TLS_IE_LO10: |
| case elfcpp::R_SPARC_TLS_IE_LD: |
| case elfcpp::R_SPARC_TLS_IE_LDX: |
| case elfcpp::R_SPARC_TLS_IE_ADD: |
| layout->set_has_static_tls(); |
| if (optimized_type == tls::TLSOPT_NONE) |
| { |
| // Create a GOT entry for the tp-relative offset. |
| Output_data_got<size, big_endian>* got |
| = target->got_section(symtab, layout); |
| unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); |
| |
| if (!object->local_has_got_offset(r_sym, GOT_TYPE_TLS_OFFSET)) |
| { |
| Reloc_section* rela_dyn = target->rela_dyn_section(layout); |
| unsigned int off = got->add_constant(0); |
| |
| object->set_local_got_offset(r_sym, GOT_TYPE_TLS_OFFSET, off); |
| |
| rela_dyn->add_symbolless_local_addend(object, r_sym, |
| (size == 64 ? |
| elfcpp::R_SPARC_TLS_TPOFF64 : |
| elfcpp::R_SPARC_TLS_TPOFF32), |
| got, off, 0); |
| } |
| } |
| else if (optimized_type != tls::TLSOPT_TO_LE) |
| unsupported_reloc_local(object, r_type); |
| break; |
| |
| case elfcpp::R_SPARC_TLS_LE_HIX22: // Local-exec |
| case elfcpp::R_SPARC_TLS_LE_LOX10: |
| layout->set_has_static_tls(); |
| if (output_is_shared) |
| { |
| // We need to create a dynamic relocation. |
| gold_assert(lsym.get_st_type() != elfcpp::STT_SECTION); |
| unsigned int r_sym = elfcpp::elf_r_sym<size>(reloc.get_r_info()); |
| Reloc_section* rela_dyn = target->rela_dyn_section(layout); |
| rela_dyn->add_symbolless_local_addend(object, r_sym, r_type, |
| output_section, data_shndx, |
| reloc.get_r_offset(), 0); |
| } |
| break; |
| } |
| } |
| break; |
| |
| // These are relocations which should only be seen by the |
| // dynamic linker, and should never be seen here. |
| case elfcpp::R_SPARC_COPY: |
| case elfcpp::R_SPARC_GLOB_DAT: |
| case elfcpp::R_SPARC_JMP_SLOT: |
| case elfcpp::R_SPARC_JMP_IREL: |
| case elfcpp::R_SPARC_RELATIVE: |
| case elfcpp::R_SPARC_IRELATIVE: |
| case elfcpp::R_SPARC_TLS_DTPMOD64: |
| case elfcpp::R_SPARC_TLS_DTPMOD32: |
| case elfcpp::R_SPARC_TLS_DTPOFF64: |
| case elfcpp::R_SPARC_TLS_DTPOFF32: |
| case elfcpp::R_SPARC_TLS_TPOFF64: |
| case elfcpp::R_SPARC_TLS_TPOFF32: |
| gold_error(_("%s: unexpected reloc %u in object file"), |
| object->name().c_str(), r_type); |
| break; |
| |
| default: |
| unsupported_reloc_local(object, r_type); |
| break; |
| } |
| } |
| |
| // Report an unsupported relocation against a global symbol. |
| |
| template<int size, bool big_endian> |
| void |
| Target_sparc<size, big_endian>::Scan::unsupported_reloc_global( |
| Sized_relobj_file<size, big_endian>* object, |
| unsigned int r_type, |
| Symbol* gsym) |
| { |
| gold_error(_("%s: unsupported reloc %u against global symbol %s"), |
| object->name().c_str(), r_type, gsym->demangled_name().c_str()); |
| } |
| |
| // Scan a relocation for a global symbol. |
| |
| template<int size, bool big_endian> |
| inline void |
| Target_sparc<size, big_endian>::Scan::global( |
| Symbol_table* symtab, |
| Layout* layout, |
| Target_sparc<size, big_endian>* target, |
| Sized_relobj_file<size, big_endian>* object, |
| unsigned int data_shndx, |
| Output_section* output_section, |
| const elfcpp::Rela<size, big_endian>& reloc, |
| unsigned int r_type, |
| Symbol* gsym) |
| { |
| unsigned int orig_r_type = r_type; |
| bool is_ifunc = gsym->type() == elfcpp::STT_GNU_IFUNC; |
| |
| // A reference to _GLOBAL_OFFSET_TABLE_ implies that we need a got |
| // section. We check here to avoid creating a dynamic reloc against |
| // _GLOBAL_OFFSET_TABLE_. |
| if (!target->has_got_section() |
| && strcmp(gsym->name(), "_GLOBAL_OFFSET_TABLE_") == 0) |
| target->got_section(symtab, layout); |
| |
| r_type &= 0xff; |
| |
| // A STT_GNU_IFUNC symbol may require a PLT entry. |
| if (is_ifunc |
| && this->reloc_needs_plt_for_ifunc(object, r_type)) |
| target->make_plt_entry(symtab, layout, gsym); |
| |
| switch (r_type) |
| { |
| case elfcpp::R_SPARC_NONE: |
| case elfcpp::R_SPARC_REGISTER: |
| case elfcpp::R_SPARC_GNU_VTINHERIT: |
| case elfcpp::R_SPARC_GNU_VTENTRY: |
| break; |
| |
| case elfcpp::R_SPARC_PLT64: |
| case elfcpp::R_SPARC_PLT32: |
| case elfcpp::R_SPARC_HIPLT22: |
| case elfcpp::R_SPARC_LOPLT10: |
| case elfcpp::R_SPARC_PCPLT32: |
| case elfcpp::R_SPARC_PCPLT22: |
| case elfcpp::R_SPARC_PCPLT10: |
| case elfcpp::R_SPARC_WPLT30: |
| // If the symbol is fully resolved, this is just a PC32 reloc. |
| // Otherwise we need a PLT entry. |
| if (gsym->final_value_is_known()) |
| break; |
| // If building a shared library, we can also skip the PLT entry |
| // if the symbol is defined in the output file and is protected |
| // or hidden. |
| if (gsym->is_defined() |
| && !gsym->is_from_dynobj() |
| && !gsym->is_preemptible()) |
| break; |
| target->make_plt_entry(symtab, layout, gsym); |
| break; |
| |
| case elfcpp::R_SPARC_DISP8: |
| case elfcpp::R_SPARC_DISP16: |
| case elfcpp::R_SPARC_DISP32: |
| case elfcpp::R_SPARC_DISP64: |
| case elfcpp::R_SPARC_PC_HH22: |
| case elfcpp::R_SPARC_PC_HM10: |
| case elfcpp::R_SPARC_PC_LM22: |
| case elfcpp::R_SPARC_PC10: |
| case elfcpp::R_SPARC_PC22: |
| case elfcpp::R_SPARC_WDISP30: |
| case elfcpp::R_SPARC_WDISP22: |
| case elfcpp::R_SPARC_WDISP19: |
| case elfcpp::R_SPARC_WDISP16: |
| case elfcpp::R_SPARC_WDISP10: |
| { |
| if (gsym->needs_plt_entry()) |
| target->make_plt_entry(symtab, layout, gsym); |
| // Make a dynamic relocation if necessary. |
| if (gsym->needs_dynamic_reloc(Scan::get_reference_flags(r_type))) |
| { |
| if (parameters->options().output_is_executable() |
| && gsym->may_need_copy_reloc()) |
| { |
| target->copy_reloc(symtab, layout, object, |
| data_shndx, output_section, gsym, |
| reloc); |
| } |
| else |
| { |
| Reloc_section* rela_dyn = target->rela_dyn_section(layout); |
| check_non_pic(object, r_type); |
| rela_dyn->add_global(gsym, orig_r_type, output_section, object, |
| data_shndx, reloc.get_r_offset(), |
| reloc.get_r_addend()); |
| } |
| } |
| } |
| break; |
| |
| case elfcpp::R_SPARC_UA64: |
| case elfcpp::R_SPARC_64: |
| case elfcpp::R_SPARC_HIX22: |
| case elfcpp::R_SPARC_LOX10: |
| case elfcpp::R_SPARC_H34: |
| case elfcpp::R_SPARC_H44: |
| case elfcpp::R_SPARC_M44: |
| case elfcpp::R_SPARC_L44: |
| case elfcpp::R_SPARC_HH22: |
| case elfcpp::R_SPARC_HM10: |
| case elfcpp::R_SPARC_LM22: |
| case elfcpp::R_SPARC_HI22: |
| case elfcpp::R_SPARC_LO10: |
| case elfcpp::R_SPARC_OLO10: |
| case elfcpp::R_SPARC_UA32: |
| case elfcpp::R_SPARC_32: |
| case elfcpp::R_SPARC_UA16: |
| case elfcpp::R_SPARC_16: |
| case elfcpp::R_SPARC_11: |
| case elfcpp::R_SPARC_10: |
| case elfcpp::R_SPARC_8: |
| case elfcpp::R_SPARC_7: |
| case elfcpp::R_SPARC_6: |
| case elfcpp::R_SPARC_5: |
| { |
| // Make a PLT entry if necessary. |
| if (gsym->needs_plt_entry()) |
| { |
| target->make_plt_entry(symtab, layout, gsym); |
| // Since this is not a PC-relative relocation, we may be |
| // taking the address of a function. In that case we need to |
| // set the entry in the dynamic symbol table to the address of |
| // the PLT entry. |
| if (gsym->is_from_dynobj() && !parameters->options().shared()) |
| gsym->set_needs_dynsym_value(); |
| } |
| // Make a dynamic relocation if necessary. |
| if (gsym->needs_dynamic_reloc(Scan::get_reference_flags(r_type))) |
| { |
| unsigned int r_off = reloc.get_r_offset(); |
| |
| // The assembler can sometimes emit unaligned relocations |
| // for dwarf2 cfi directives. |
| switch (r_type) |
| { |
| case elfcpp::R_SPARC_16: |
| if (r_off & 0x1) |
| orig_r_type = r_type = elfcpp::R_SPARC_UA16; |
| break; |
| case elfcpp::R_SPARC_32: |
| if (r_off & 0x3) |
| orig_r_type = r_type = elfcpp::R_SPARC_UA32; |
| break; |
| case elfcpp::R_SPARC_64: |
| if (r_off & 0x7) |
| orig_r_type = r_type = elfcpp::R_SPARC_UA64; |
| break; |
| case elfcpp::R_SPARC_UA16: |
| if (!(r_off & 0x1)) |
| orig_r_type = r_type = elfcpp::R_SPARC_16; |
| break; |
| case elfcpp::R_SPARC_UA32: |
| if (!(r_off & 0x3)) |
| orig_r_type = r_type = elfcpp::R_SPARC_32; |
| break; |
| case elfcpp::R_SPARC_UA64: |
| if (!(r_off & 0x7)) |
| orig_r_type = r_type = elfcpp::R_SPARC_64; |
| break; |
| } |
| |
| if (!parameters->options().output_is_position_independent() |
| && gsym->may_need_copy_reloc()) |
| { |
| target->copy_reloc(symtab, layout, object, |
| data_shndx, output_section, gsym, reloc); |
| } |
| else if (((size == 64 && r_type == elfcpp::R_SPARC_64) |
| || (size == 32 && r_type == elfcpp::R_SPARC_32)) |
| && gsym->type() == elfcpp::STT_GNU_IFUNC |
| && gsym->can_use_relative_reloc(false) |
| && !gsym->is_from_dynobj() |
| && !gsym->is_undefined() |
| && !gsym->is_preemptible()) |
| { |
| // Use an IRELATIVE reloc for a locally defined |
| // STT_GNU_IFUNC symbol. This makes a function |
| // address in a PIE executable match the address in a |
| // shared library that it links against. |
| Reloc_section* rela_dyn = |
| target->rela_ifunc_section(layout); |
| unsigned int r_type = elfcpp::R_SPARC_IRELATIVE; |
| rela_dyn->add_symbolless_global_addend(gsym, r_type, |
| output_section, object, |
| data_shndx, |
| reloc.get_r_offset(), |
| reloc.get_r_addend()); |
| } |
| else if (((size == 64 && r_type == elfcpp::R_SPARC_64) |
| || (size == 32 && r_type == elfcpp::R_SPARC_32)) |
| && gsym->can_use_relative_reloc(false)) |
| { |
| Reloc_section* rela_dyn = target->rela_dyn_section(layout); |
| rela_dyn->add_global_relative(gsym, elfcpp::R_SPARC_RELATIVE, |
| output_section, object, |
| data_shndx, reloc.get_r_offset(), |
| reloc.get_r_addend(), is_ifunc); |
| } |
| else |
| { |
| Reloc_section* rela_dyn = target->rela_dyn_section(layout); |
| |
| check_non_pic(object, r_type); |
| if (gsym->is_from_dynobj() |
| || gsym->is_undefined() |
| || gsym->is_preemptible()) |
| rela_dyn->add_global(gsym, orig_r_type, output_section, |
| object, data_shndx, |
| reloc.get_r_offset(), |
| reloc.get_r_addend()); |
| else |
| rela_dyn->add_symbolless_global_addend(gsym, orig_r_type, |
| output_section, |
| object, data_shndx, |
| reloc.get_r_offset(), |
| reloc.get_r_addend()); |
| } |
| } |
| } |
| break; |
| |
| case elfcpp::R_SPARC_GOTDATA_OP: |
| case elfcpp::R_SPARC_GOTDATA_OP_HIX22: |
| case elfcpp::R_SPARC_GOTDATA_OP_LOX10: |
| if (gsym->is_defined() |
| && !gsym->is_from_dynobj() |
| && !gsym->is_preemptible() |
| && !is_ifunc) |
| { |
| // We will optimize this into a GOT relative relocation |
| // and code transform the GOT load into an addition. |
| break; |
| } |
| // Fall through. |
| case elfcpp::R_SPARC_GOT10: |
| case elfcpp::R_SPARC_GOT13: |
| case elfcpp::R_SPARC_GOT22: |
| { |
| // The symbol requires a GOT entry. |
| Output_data_got<size, big_endian>* got; |
| |
| got = target->got_section(symtab, layout); |
| if (gsym->final_value_is_known()) |
| { |
| // For a STT_GNU_IFUNC symbol we want the PLT address. |
| if (gsym->type() == elfcpp::STT_GNU_IFUNC) |
| got->add_global_plt(gsym, GOT_TYPE_STANDARD); |
| else |
| got->add_global(gsym, GOT_TYPE_STANDARD); |
| } |
| else |
| { |
| // If this symbol is not fully resolved, we need to add a |
| // GOT entry with a dynamic relocation. |
| bool is_ifunc = gsym->type() == elfcpp::STT_GNU_IFUNC; |
| |
| // Use a GLOB_DAT rather than a RELATIVE reloc if: |
| // |
| // 1) The symbol may be defined in some other module. |
| // |
| // 2) We are building a shared library and this is a |
| // protected symbol; using GLOB_DAT means that the dynamic |
| // linker can use the address of the PLT in the main |
| // executable when appropriate so that function address |
| // comparisons work. |
| // |
| // 3) This is a STT_GNU_IFUNC symbol in position dependent |
| // code, again so that function address comparisons work. |
| Reloc_section* rela_dyn = target->rela_dyn_section(layout); |
| if (gsym->is_from_dynobj() |
| || gsym->is_undefined() |
| || gsym->is_preemptible() |
| || (gsym->visibility() == elfcpp::STV_PROTECTED |
| && parameters->options().shared()) |
| || (gsym->type() == elfcpp::STT_GNU_IFUNC |
| && parameters->options().output_is_position_independent() |
| && !gsym->is_forced_local())) |
| { |
| unsigned int r_type = elfcpp::R_SPARC_GLOB_DAT; |
| |
| // If this symbol is forced local, this relocation will |
| // not work properly. That's because ld.so on sparc |
| // (and 32-bit powerpc) expects st_value in the r_addend |
| // of relocations for STB_LOCAL symbols. Curiously the |
| // BFD linker does not promote global hidden symbols to be |
| // STB_LOCAL in the dynamic symbol table like Gold does. |
| gold_assert(!gsym->is_forced_local()); |
| got->add_global_with_rel(gsym, GOT_TYPE_STANDARD, rela_dyn, |
| r_type); |
| } |
| else if (!gsym->has_got_offset(GOT_TYPE_STANDARD)) |
| { |
| unsigned int off = got->add_constant(0); |
| |
| gsym->set_got_offset(GOT_TYPE_STANDARD, off); |
| if (is_ifunc) |
| { |
| // Tell the dynamic linker to use the PLT address |
| // when resolving relocations. |
| if (gsym->is_from_dynobj() |
| && !parameters->options().shared()) |
| gsym->set_needs_dynsym_value(); |
| } |
| rela_dyn->add_global_relative(gsym, elfcpp::R_SPARC_RELATIVE, |
| got, off, 0, is_ifunc); |
| } |
| } |
| } |
| break; |
| |
| // These are initial tls relocs, which are expected when |
| // linking. |
| case elfcpp::R_SPARC_TLS_GD_HI22: // Global-dynamic |
| case elfcpp::R_SPARC_TLS_GD_LO10: |
| case elfcpp::R_SPARC_TLS_GD_ADD: |
| case elfcpp::R_SPARC_TLS_GD_CALL: |
| case elfcpp::R_SPARC_TLS_LDM_HI22: // Local-dynamic |
| case elfcpp::R_SPARC_TLS_LDM_LO10: |
| case elfcpp::R_SPARC_TLS_LDM_ADD: |
| case elfcpp::R_SPARC_TLS_LDM_CALL: |
| case elfcpp::R_SPARC_TLS_LDO_HIX22: // Alternate local-dynamic |
| case elfcpp::R_SPARC_TLS_LDO_LOX10: |
| case elfcpp::R_SPARC_TLS_LDO_ADD: |
| case elfcpp::R_SPARC_TLS_LE_HIX22: |
| case elfcpp::R_SPARC_TLS_LE_LOX10: |
| case elfcpp::R_SPARC_TLS_IE_HI22: // Initial-exec |
| case elfcpp::R_SPARC_TLS_IE_LO10: |
| case elfcpp::R_SPARC_TLS_IE_LD: |
| case elfcpp::R_SPARC_TLS_IE_LDX: |
| case elfcpp::R_SPARC_TLS_IE_ADD: |
| { |
| const bool is_final = gsym->final_value_is_known(); |
| const tls::Tls_optimization optimized_type |
| = optimize_tls_reloc(is_final, r_type); |
| switch (r_type) |
| { |
| case elfcpp::R_SPARC_TLS_GD_HI22: // Global-dynamic |
| case elfcpp::R_SPARC_TLS_GD_LO10: |
| case elfcpp::R_SPARC_TLS_GD_ADD: |
| case elfcpp::R_SPARC_TLS_GD_CALL: |
| if (optimized_type == tls::TLSOPT_NONE) |
| { |
| // Create a pair of GOT entries for the module index and |
| // dtv-relative offset. |
| Output_data_got<size, big_endian>* got |
| = target->got_section(symtab, layout); |
| got->add_global_pair_with_rel(gsym, GOT_TYPE_TLS_PAIR, |
| target->rela_dyn_section(layout), |
| (size == 64 |
| ? elfcpp::R_SPARC_TLS_DTPMOD64 |
| : elfcpp::R_SPARC_TLS_DTPMOD32), |
| (size == 64 |
| ? elfcpp::R_SPARC_TLS_DTPOFF64 |
| : elfcpp::R_SPARC_TLS_DTPOFF32)); |
| |
| // Emit R_SPARC_WPLT30 against "__tls_get_addr" |
| if (r_type == elfcpp::R_SPARC_TLS_GD_CALL) |
| generate_tls_call(symtab, layout, target); |
| } |
| else if (optimized_type == tls::TLSOPT_TO_IE) |
| { |
| // Create a GOT entry for the tp-relative offset. |
| Output_data_got<size, big_endian>* got |
| = target->got_section(symtab, layout); |
| got->add_global_with_rel(gsym, GOT_TYPE_TLS_OFFSET, |
| target->rela_dyn_section(layout), |
| (size == 64 ? |
| elfcpp::R_SPARC_TLS_TPOFF64 : |
| elfcpp::R_SPARC_TLS_TPOFF32)); |
| } |
| else if (optimized_type != tls::TLSOPT_TO_LE) |
| unsupported_reloc_global(object, r_type, gsym); |
| break; |
| |
| case elfcpp::R_SPARC_TLS_LDM_HI22: // Local-dynamic |
| case elfcpp::R_SPARC_TLS_LDM_LO10: |
| case elfcpp::R_SPARC_TLS_LDM_ADD: |
| case elfcpp::R_SPARC_TLS_LDM_CALL: |
| if (optimized_type == tls::TLSOPT_NONE) |
| { |
| // Create a GOT entry for the module index. |
| target->got_mod_index_entry(symtab, layout, object); |
| |
| if (r_type == elfcpp::R_SPARC_TLS_LDM_CALL) |
| generate_tls_call(symtab, layout, target); |
| } |
| else if (optimized_type != tls::TLSOPT_TO_LE) |
| unsupported_reloc_global(object, r_type, gsym); |
| break; |
| |
| case elfcpp::R_SPARC_TLS_LDO_HIX22: // Alternate local-dynamic |
| case elfcpp::R_SPARC_TLS_LDO_LOX10: |
| case elfcpp::R_SPARC_TLS_LDO_ADD: |
| break; |
| |
| case elfcpp::R_SPARC_TLS_LE_HIX22: |
| case elfcpp::R_SPARC_TLS_LE_LOX10: |
| layout->set_has_static_tls(); |
| if (parameters->options().shared()) |
| { |
| Reloc_section* rela_dyn = target->rela_dyn_section(layout); |
| rela_dyn->add_symbolless_global_addend(gsym, orig_r_type, |
| output_section, object, |
| data_shndx, reloc.get_r_offset(), |
| 0); |
| } |
| break; |
| |
| case elfcpp::R_SPARC_TLS_IE_HI22: // Initial-exec |
| case elfcpp::R_SPARC_TLS_IE_LO10: |
| case elfcpp::R_SPARC_TLS_IE_LD: |
| case elfcpp::R_SPARC_TLS_IE_LDX: |
| case elfcpp::R_SPARC_TLS_IE_ADD: |
| layout->set_has_static_tls(); |
| if (optimized_type == tls::TLSOPT_NONE) |
| { |
| // Create a GOT entry for the tp-relative offset. |
| Output_data_got<size, big_endian>* got |
| = target->got_section(symtab, layout); |
| got->add_global_with_rel(gsym, GOT_TYPE_TLS_OFFSET, |
| target->rela_dyn_section(layout), |
| (size == 64 |
| ? elfcpp::R_SPARC_TLS_TPOFF64 |
| : elfcpp::R_SPARC_TLS_TPOFF32)); |
| } |
| else if (optimized_type != tls::TLSOPT_TO_LE) |
| unsupported_reloc_global(object, r_type, gsym); |
| break; |
| } |
| } |
| break; |
| |
| // These are relocations which should only be seen by the |
| // dynamic linker, and should never be seen here. |
| case elfcpp::R_SPARC_COPY: |
| case elfcpp::R_SPARC_GLOB_DAT: |
| case elfcpp::R_SPARC_JMP_SLOT: |
| case elfcpp::R_SPARC_JMP_IREL: |
| case elfcpp::R_SPARC_RELATIVE: |
| case elfcpp::R_SPARC_IRELATIVE: |
| case elfcpp::R_SPARC_TLS_DTPMOD64: |
| case elfcpp::R_SPARC_TLS_DTPMOD32: |
| case elfcpp::R_SPARC_TLS_DTPOFF64: |
| case elfcpp::R_SPARC_TLS_DTPOFF32: |
| case elfcpp::R_SPARC_TLS_TPOFF64: |
| case elfcpp::R_SPARC_TLS_TPOFF32: |
| gold_error(_("%s: unexpected reloc %u in object file"), |
| object->name().c_str(), r_type); |
| break; |
| |
| default: |
| unsupported_reloc_global(object, r_type, gsym); |
| break; |
| } |
| } |
| |
| // Make a new symbol table entry. |
| // STT_SPARC_REGISTER symbols require special handling, |
| // so we intercept these symbols and keep track of them separately. |
| // We will resolve register symbols here and output them at symbol |
| // finalization time. |
| |
| template<int size, bool big_endian> |
| Sized_symbol<size>* |
| Target_sparc<size, big_endian>::make_symbol(const char* name, |
| elfcpp::STT type, |
| Object* object, |
| unsigned int shndx, |
| uint64_t value) |
| { |
| // REGISTER symbols are used only on SPARC-64. |
| if (size == 64 && type == elfcpp::STT_SPARC_REGISTER) |
| { |
| // Ignore REGISTER symbols in dynamic objects. |
| if (object->is_dynamic()) |
| return NULL; |
| // Only registers 2, 3, 6, and 7 can be declared global. |
| int reg = value; |
| switch (reg) |
| { |
| case 2: case 3: |
| reg -= 2; |
| break; |
| case 6: case 7: |
| reg -= 4; |
| break; |
| default: |
| gold_error(_("%s: only registers %%g[2367] can be declared " |
| "using STT_REGISTER"), |
| object->name().c_str()); |
| return NULL; |
| } |
| Register_symbol& rsym = this->register_syms_[reg]; |
| if (rsym.name == NULL) |
| { |
| rsym.name = name; |
| rsym.shndx = shndx; |
| rsym.obj = object; |
| } |
| else |
| { |
| if (strcmp(rsym.name, name) != 0) |
| { |
| gold_error(_("%s: register %%g%d declared as '%s'; " |
| "previously declared as '%s' in %s"), |
| object->name().c_str(), |
| static_cast<int>(value), |
| *name ? name : "#scratch", |
| *rsym.name ? rsym.name : "#scratch", |
| rsym.obj->name().c_str()); |
| return NULL; |
| } |
| } |
| return NULL; |
| } |
| return new Sized_symbol<size>(); |
| } |
| |
| // 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; |
| typedef gold::Default_classify_reloc<elfcpp::SHT_RELA, size, big_endian> |
| Classify_reloc; |
| |
| gold::gc_process_relocs<size, big_endian, Sparc, Scan, Classify_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 gold::Default_classify_reloc<elfcpp::SHT_RELA, size, big_endian> |
| Classify_reloc; |
| |
| 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, Scan, Classify_reloc>( |
| symtab, |
| layout, |
| this, |
| object, |
| data_shndx, |
| prelocs, |
| reloc_count, |
| output_section, |
| needs_special_offset_handling, |
| local_symbol_count, |
| plocal_symbols); |
| } |
| |
| // Finalize the sections. |
| |
| template<int size, bool big_endian> |
| void |
| Target_sparc<size, big_endian>::do_finalize_sections( |
| Layout* layout, |
| const Input_objects*, |
| Symbol_table* symtab) |
| { |
| if (this->plt_) |
| this->plt_->emit_pending_ifunc_relocs(); |
| |
| // Fill in some more dynamic tags. |
| const Reloc_section* rel_plt = (this->plt_ == NULL |
| ? NULL |
| : this->plt_->rel_plt()); |
| layout->add_target_dynamic_tags(false, this->plt_, rel_plt, |
| this->rela_dyn_, true, true); |
| |
| // Emit any relocs we saved in an attempt to avoid generating COPY |
| // relocs. |
| if (this->copy_relocs_.any_saved_relocs()) |
| this->copy_relocs_.emit(this->rela_dyn_section(layout)); |
| |
| if (parameters->doing_static_link() |
| && (this->plt_ == NULL || !this->plt_->has_ifunc_section())) |
| { |
| // If linking statically, make sure that the __rela_iplt symbols |
| // were defined if necessary, even if we didn't create a PLT. |
| static const Define_symbol_in_segment syms[] = |
| { |
| { |
| "__rela_iplt_start", // name |
| elfcpp::PT_LOAD, // segment_type |
| elfcpp::PF_W, // segment_flags_set |
| elfcpp::PF(0), // segment_flags_clear |
| 0, // value |
| 0, // size |
| elfcpp::STT_NOTYPE, // type |
| elfcpp::STB_GLOBAL, // binding |
| elfcpp::STV_HIDDEN, // visibility |
| 0, // nonvis |
| Symbol::SEGMENT_START, // offset_from_base |
| true // only_if_ref |
| }, |
| { |
| "__rela_iplt_end", // name |
| elfcpp::PT_LOAD, // segment_type |
| elfcpp::PF_W, // segment_flags_set |
| elfcpp::PF(0), // segment_flags_clear |
| 0, // value |
| 0, // size |
| elfcpp::STT_NOTYPE, // type |
| elfcpp::STB_GLOBAL, // binding |
| elfcpp::STV_HIDDEN, // visibility |
| 0, // nonvis |
| Symbol::SEGMENT_START, // offset_from_base |
| true // only_if_ref |
| } |
| }; |
| |
| symtab->define_symbols(layout, 2, syms, |
| layout->script_options()->saw_sections_clause()); |
| } |
| |
| for (int reg = 0; reg < 4; ++reg) |
| { |
| Register_symbol& rsym = this->register_syms_[reg]; |
| if (rsym.name != NULL) |
| { |
| int value = reg < 3 ? reg + 2 : reg + 4; |
| Sized_symbol<size>* sym = new Sized_symbol<size>(); |
| if (rsym.shndx == elfcpp::SHN_UNDEF) |
| sym->init_undefined(rsym.name, NULL, value, |
| elfcpp::STT_SPARC_REGISTER, elfcpp::STB_GLOBAL, |
| elfcpp::STV_DEFAULT, 0); |
| else |
| sym->init_constant(rsym.name, NULL, value, 0, |
| elfcpp::STT_SPARC_REGISTER, elfcpp::STB_GLOBAL, |
| elfcpp::STV_DEFAULT, 0, false); |
| symtab->add_target_global_symbol(sym); |
| layout->add_target_specific_dynamic_tag(elfcpp::DT_SPARC_REGISTER, |
| value); |
| } |
| } |
| } |
| |
| // 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, |
| unsigned int, |
| Target_sparc* target, |
| Output_section*, |
| size_t relnum, |
| const unsigned char* preloc, |
| const Sized_symbol<size>* gsym, |
| const Symbol_value<size>* psymval, |
| unsigned char* view, |
| typename elfcpp::Elf_types<size>::Elf_Addr address, |
| section_size_type view_size) |
| { |
| const elfcpp::Rela<size, big_endian> rela(preloc); |
| unsigned int r_type = elfcpp::elf_r_type<size>(rela.get_r_info()); |
| bool orig_is_ifunc = psymval->is_ifunc_symbol(); |
| r_type &= 0xff; |
| |
| if (this->ignore_gd_add_) |
| { |
| if (r_type != elfcpp::R_SPARC_TLS_GD_ADD) |
| gold_error_at_location(relinfo, relnum, rela.get_r_offset(), |
| _("missing expected TLS relocation")); |
| else |
| { |
| this->ignore_gd_add_ = false; |
| return false; |
| } |
| } |
| |
| if (view == NULL) |
| return true; |
| |
| if (this->reloc_adjust_addr_ == view) |
| view -= 4; |
| |
| typedef Sparc_relocate_functions<size, big_endian> Reloc; |
| const Sized_relobj_file<size, big_endian>* object = relinfo->object; |
| |
| // Pick the value to use for symbols defined in shared objects. |
| Symbol_value<size> symval; |
| if (gsym != NULL |
| && gsym->use_plt_offset(Scan::get_reference_flags(r_type))) |
| { |
| elfcpp::Elf_Xword value; |
| |
| value = target->plt_address_for_global(gsym); |
| |
| symval.set_output_value(value); |
| |
| psymval = &symval; |
| } |
| else if (gsym == NULL && orig_is_ifunc) |
| { |
| unsigned int r_sym = elfcpp::elf_r_sym<size>(rela.get_r_info()); |
| if (object->local_has_plt_offset(r_sym)) |
| { |
| symval.set_output_value(target->plt_address_for_local(object, r_sym)); |
| psymval = &symval; |
| } |
| } |
| |
| const elfcpp::Elf_Xword addend = rela.get_r_addend(); |
| |
| // Get the GOT offset if needed. Unlike i386 and x86_64, our GOT |
| // pointer points to the beginning, not the end, of the table. |
| // So we just use the plain offset. |
| unsigned int got_offset = 0; |
| bool gdop_valid = false; |
| switch (r_type) |
| { |
| case elfcpp::R_SPARC_GOTDATA_OP: |
| case elfcpp::R_SPARC_GOTDATA_OP_HIX22: |
| case elfcpp::R_SPARC_GOTDATA_OP_LOX10: |
| // If this is local, we did not create a GOT entry because we |
| // intend to transform this into a GOT relative relocation. |
| if (gsym == NULL |
| || (gsym->is_defined() |
| && !gsym->is_from_dynobj() |
| && !gsym->is_preemptible() |
| && !orig_is_ifunc)) |
| { |
| got_offset = psymval->value(object, addend) - target->got_address(); |
| gdop_valid = true; |
| break; |
| } |
| // Fall through. |
| case elfcpp::R_SPARC_GOT10: |
| case elfcpp::R_SPARC_GOT13: |
| case elfcpp::R_SPARC_GOT22: |
| if (gsym != NULL) |
| { |
| gold_assert(gsym->has_got_offset(GOT_TYPE_STANDARD)); |
| got_offset = gsym->got_offset(GOT_TYPE_STANDARD); |
| } |
| else |
| { |
| unsigned int r_sym = elfcpp::elf_r_sym<size>(rela.get_r_info()); |
| gold_assert(object->local_has_got_offset(r_sym, GOT_TYPE_STANDARD)); |
| got_offset = object->local_got_offset(r_sym, GOT_TYPE_STANDARD); |
| } |
| break; |
| |
| default: |
| break; |
| } |
| |
| switch (r_type) |
| { |
| case elfcpp::R_SPARC_NONE: |
| case elfcpp::R_SPARC_REGISTER: |
| case elfcpp::R_SPARC_GNU_VTINHERIT: |
| case elfcpp::R_SPARC_GNU_VTENTRY: |
| break; |
| |
| case elfcpp::R_SPARC_8: |
| Relocate_functions<size, big_endian>::rela8(view, object, |
| psymval, addend); |
| break; |
| |
| case elfcpp::R_SPARC_16: |
| if (rela.get_r_offset() & 0x1) |
| { |
| // The assembler can sometimes emit unaligned relocations |
| // for dwarf2 cfi directives. |
| Reloc::ua16(view, object, psymval, addend); |
| } |
| else |
| Relocate_functions<size, big_endian>::rela16(view, object, |
| psymval, addend); |
| break; |
| |
| case elfcpp::R_SPARC_32: |
| if (!parameters->options().output_is_position_independent()) |
| { |
| if (rela.get_r_offset() & 0x3) |
| { |
| // The assembler can sometimes emit unaligned relocations |
| // for dwarf2 cfi directives. |
| Reloc::ua32(view, object, psymval, addend); |
| } |
| else |
| Relocate_functions<size, big_endian>::rela32(view, object, |
| psymval, addend); |
| } |
| break; |
| |
| case elfcpp::R_SPARC_DISP8: |
| Reloc::disp8(view, object, psymval, addend, address); |
| break; |
| |
| case elfcpp::R_SPARC_DISP16: |
| Reloc::disp16(view, object, psymval, addend, address); |
| break; |
| |
| case elfcpp::R_SPARC_DISP32: |
| Reloc::disp32(view, object, psymval, addend, address); |
| break; |
| |
| case elfcpp::R_SPARC_DISP64: |
| Reloc::disp64(view, object, psymval, addend, address); |
| break; |
| |
| case elfcpp::R_SPARC_WDISP30: |
| case elfcpp::R_SPARC_WPLT30: |
| Reloc::wdisp30(view, object, psymval, addend, address); |
| if (target->may_relax()) |
| relax_call(target, view, rela, view_size); |
| break; |
| |
| case elfcpp::R_SPARC_WDISP22: |
| Reloc::wdisp22(view, object, psymval, addend, address); |
| break; |
| |
| case elfcpp::R_SPARC_WDISP19: |
| Reloc::wdisp19(view, object, psymval, addend, address); |
| break; |
| |
| case elfcpp::R_SPARC_WDISP16: |
| Reloc::wdisp16(view, object, psymval, addend, address); |
| break; |
| |
| case elfcpp::R_SPARC_WDISP10: |
| Reloc::wdisp10(view, object, psymval, addend, address); |
| break; |
| |
| case elfcpp::R_SPARC_HI22: |
| Reloc::hi22(view, object, psymval, addend); |
| break; |
| |
| case elfcpp::R_SPARC_22: |
| Reloc::rela32_22(view, object, psymval, addend); |
| break; |
| |
| case elfcpp::R_SPARC_13: |
| Reloc::rela32_13(view, object, psymval, addend); |
| break; |
| |
| case elfcpp::R_SPARC_LO10: |
| Reloc::lo10(view, object, psymval, addend); |
| break; |
| |
| case elfcpp::R_SPARC_GOTDATA_OP_LOX10: |
| if (gdop_valid) |
| { |
| Reloc::gdop_lox10(view, got_offset); |
| break; |
| } |
| // Fall through. |
| case elfcpp::R_SPARC_GOT10: |
| Reloc::lo10(view, got_offset, addend); |
| break; |
| |
| case elfcpp::R_SPARC_GOTDATA_OP: |
| if (gdop_valid) |
| { |
| typedef typename elfcpp::Swap<32, true>::Valtype Insntype; |
| Insntype* wv = reinterpret_cast<Insntype*>(view); |
| Insntype val; |
| |
| // {ld,ldx} [%rs1 + %rs2], %rd --> add %rs1, %rs2, %rd |
| val = elfcpp::Swap<32, true>::readval(wv); |
| val = 0x80000000 | (val & 0x3e07c01f); |
| elfcpp::Swap<32, true>::writeval(wv, val); |
| } |
| break; |
| |
| case elfcpp::R_SPARC_GOT13: |
| Reloc::rela32_13(view, got_offset, addend); |
| break; |
| |
| case elfcpp::R_SPARC_GOTDATA_OP_HIX22: |
| if (gdop_valid) |
| { |
| Reloc::gdop_hix22(view, got_offset); |
| break; |
| } |
| // Fall through. |
| case elfcpp::R_SPARC_GOT22: |
| Reloc::hi22(view, got_offset, addend); |
| break; |
| |
| case elfcpp::R_SPARC_PC10: |
| Reloc::pc10(view, object, psymval, addend, address); |
| break; |
| |
| case elfcpp::R_SPARC_PC22: |
| Reloc::pc22(view, object, psymval, addend, address); |
| break; |
| |
| case elfcpp::R_SPARC_TLS_DTPOFF32: |
| case elfcpp::R_SPARC_UA32: |
| Reloc::ua32(view, object, psymval, addend); |
| break; |
| |
| case elfcpp::R_SPARC_PLT64: |
| Relocate_functions<size, big_endian>::rela64(view, object, |
| psymval, addend); |
| break; |
| |
| case elfcpp::R_SPARC_PLT32: |
| Relocate_functions<size, big_endian>::rela32(view, object, |
| psymval, addend); |
| break; |
| |
| case elfcpp::R_SPARC_HIPLT22: |
| Reloc::hi22(view, object, psymval, addend); |
| break; |
| |
| case elfcpp::R_SPARC_LOPLT10: |
| Reloc::lo10(view, object, psymval, addend); |
| break; |
| |
| case elfcpp::R_SPARC_PCPLT32: |
| Reloc::disp32(view, object, psymval, addend, address); |
| break; |
| |
| case elfcpp::R_SPARC_PCPLT22: |
| Reloc::pcplt22(view, object, psymval, addend, address); |
| break; |
| |
| case elfcpp::R_SPARC_PCPLT10: |
| Reloc::lo10(view, object, psymval, addend, address); |
| break; |
| |
| case elfcpp::R_SPARC_64: |
| if (!parameters->options().output_is_position_independent()) |
| { |
| if (rela.get_r_offset() & 0x7) |
| { |
| // The assembler can sometimes emit unaligned relocations |
| // for dwarf2 cfi directives. |
| Reloc::ua64(view, object, psymval, addend); |
| } |
| else |
| Relocate_functions<size, big_endian>::rela64(view, object, |
| psymval, addend); |
| } |
| break; |
| |
| case elfcpp::R_SPARC_OLO10: |
| { |
| unsigned int addend2 = rela.get_r_info() & 0xffffffff; |
| addend2 = ((addend2 >> 8) ^ 0x800000) - 0x800000; |
| Reloc::olo10(view, object, psymval, addend, addend2); |
| } |
| break; |
| |
| case elfcpp::R_SPARC_HH22: |
| Reloc::hh22(view, object, psymval, addend); |
| break; |
| |
| case elfcpp::R_SPARC_PC_HH22: |
| Reloc::pc_hh22(view, object, psymval, addend, address); |
| break; |
| |
| case elfcpp::R_SPARC_HM10: |
| Reloc::hm10(view, object, psymval, addend); |
| break; |
| |
| case elfcpp::R_SPARC_PC_HM10: |
| Reloc::pc_hm10(view, object, psymval, addend, address); |
| break; |
| |
| case elfcpp::R_SPARC_LM22: |
| Reloc::hi22(view, object, psymval, addend); |
| break; |
| |
| case elfcpp::R_SPARC_PC_LM22: |
| Reloc::pcplt22(view, object, psymval, addend, address); |
| break; |
| |
| case elfcpp::R_SPARC_11: |
| Reloc::rela32_11(view, object, psymval, addend); |
| break; |
| |
| case elfcpp::R_SPARC_10: |
| Reloc::rela32_10(view, object, psymval, addend); |
| break; |
| |
| case elfcpp::R_SPARC_7: |
| Reloc::rela32_7(view, object, psymval, addend); |
| break; |
| |
| case elfcpp::R_SPARC_6: |
| Reloc::rela32_6(view, object, psymval, addend); |
| break; |
| |
| case elfcpp::R_SPARC_5: |
| Reloc::rela32_5(view, object, psymval, addend); |
| break; |
| |
| case elfcpp::R_SPARC_HIX22: |
| Reloc::hix22(view, object, psymval, addend); |
| break; |
| |
| case elfcpp::R_SPARC_LOX10: |
| Reloc::lox10(view, object, psymval, addend); |
| break; |
| |
| case elfcpp::R_SPARC_H34: |
| Reloc::h34(view, object, psymval, addend); |
| break; |
| |
| case elfcpp::R_SPARC_H44: |
| Reloc::h44(view, object, psymval, addend); |
| break; |
| |
| case elfcpp::R_SPARC_M44: |
| Reloc::m44(view, object, psymval, addend); |
| break; |
| |
| case elfcpp::R_SPARC_L44: |
| Reloc::l44(view, object, psymval, addend); |
| break; |
| |
| case elfcpp::R_SPARC_TLS_DTPOFF64: |
| case elfcpp::R_SPARC_UA64: |
| Reloc::ua64(view, object, psymval, addend); |
| break; |
| |
| case elfcpp::R_SPARC_UA16: |
| Reloc::ua16(view, object, psymval, addend); |
| break; |
| |
| case elfcpp::R_SPARC_TLS_GD_HI22: |
| case elfcpp::R_SPARC_TLS_GD_LO10: |
| case elfcpp::R_SPARC_TLS_GD_ADD: |
| case elfcpp::R_SPARC_TLS_GD_CALL: |
| case elfcpp::R_SPARC_TLS_LDM_HI22: |
| case elfcpp::R_SPARC_TLS_LDM_LO10: |
| case elfcpp::R_SPARC_TLS_LDM_ADD: |
| case elfcpp::R_SPARC_TLS_LDM_CALL: |
| case elfcpp::R_SPARC_TLS_LDO_HIX22: |
| case elfcpp::R_SPARC_TLS_LDO_LOX10: |
| case elfcpp::R_SPARC_TLS_LDO_ADD: |
| case elfcpp::R_SPARC_TLS_IE_HI22: |
| case elfcpp::R_SPARC_TLS_IE_LO10: |
| case elfcpp::R_SPARC_TLS_IE_LD: |
| case elfcpp::R_SPARC_TLS_IE_LDX: |
| case elfcpp::R_SPARC_TLS_IE_ADD: |
| case elfcpp::R_SPARC_TLS_LE_HIX22: |
| case elfcpp::R_SPARC_TLS_LE_LOX10: |
| this->relocate_tls(relinfo, target, relnum, rela, |
| r_type, gsym, psymval, view, |
| address, view_size); |
| break; |
| |
| case elfcpp::R_SPARC_COPY: |
| case elfcpp::R_SPARC_GLOB_DAT: |
| case elfcpp::R_SPARC_JMP_SLOT: |
| case elfcpp::R_SPARC_JMP_IREL: |
| case elfcpp::R_SPARC_RELATIVE: |
| case elfcpp::R_SPARC_IRELATIVE: |
| // These are outstanding tls relocs, which are unexpected when |
| // linking. |
| case elfcpp::R_SPARC_TLS_DTPMOD64: |
| case elfcpp::R_SPARC_TLS_DTPMOD32: |
| case elfcpp::R_SPARC_TLS_TPOFF64: |
| case elfcpp::R_SPARC_TLS_TPOFF32: |
| gold_error_at_location(relinfo, relnum, rela.get_r_offset(), |
| _("unexpected reloc %u in object file"), |
| r_type); |
| break; |
| |
| default: |
| gold_error_at_location(relinfo, relnum, rela.get_r_offset(), |
| _("unsupported reloc %u"), |
| r_type); |
| break; |
| } |
| |
| return true; |
| } |
| |
| // Perform a TLS relocation. |
| |
| template<int size, bool big_endian> |
| inline void |
| Target_sparc<size, big_endian>::Relocate::relocate_tls( |
| const Relocate_info<size, big_endian>* relinfo, |
| Target_sparc<size, big_endian>* target, |
| size_t relnum, |
| const elfcpp::Rela<size, big_endian>& rela, |
| unsigned int r_type, |
| const Sized_symbol<size>* gsym, |
| const Symbol_value<size>* psymval, |
| unsigned char* view, |
| typename elfcpp::Elf_types<size>::Elf_Addr address, |
| section_size_type) |
| { |
| Output_segment* tls_segment = relinfo->layout->tls_segment(); |
| typedef Sparc_relocate_functions<size, big_endian> Reloc; |
| const Sized_relobj_file<size, big_endian>* object = relinfo->object; |
| typedef typename elfcpp::Swap<32, true>::Valtype Insntype; |
| |
| const elfcpp::Elf_Xword addend = rela.get_r_addend(); |
| typename elfcpp::Elf_types<size>::Elf_Addr value = psymval->value(object, 0); |
| |
| const bool is_final = |
| (gsym == NULL |
| ? !parameters->options().shared() |
| : gsym->final_value_is_known()); |
| const tls::Tls_optimization optimized_type |
| = optimize_tls_reloc(is_final, r_type); |
| |
| switch (r_type) |
| { |
| case elfcpp::R_SPARC_TLS_GD_HI22: |
| case elfcpp::R_SPARC_TLS_GD_LO10: |
| case elfcpp::R_SPARC_TLS_GD_ADD: |
| case elfcpp::R_SPARC_TLS_GD_CALL: |
| if (optimized_type == tls::TLSOPT_TO_LE) |
| { |
| Insntype* wv = reinterpret_cast<Insntype*>(view); |
| Insntype val; |
| |
| value -= tls_segment->memsz(); |
| |
| switch (r_type) |
| { |
| case elfcpp::R_SPARC_TLS_GD_HI22: |
| // TLS_GD_HI22 --> TLS_LE_HIX22 |
| Reloc::hix22(view, value, addend); |
| break; |
| |
| case elfcpp::R_SPARC_TLS_GD_LO10: |
| // TLS_GD_LO10 --> TLS_LE_LOX10 |
| Reloc::lox10(view, value, addend); |
| break; |
| |
| case elfcpp::R_SPARC_TLS_GD_ADD: |
| // add %reg1, %reg2, %reg3 --> mov %g7, %reg2, %reg3 |
| val = elfcpp::Swap<32, true>::readval(wv); |
| val = (val & ~0x7c000) | 0x1c000; |
| elfcpp::Swap<32, true>::writeval(wv, val); |
| break; |
| case elfcpp::R_SPARC_TLS_GD_CALL: |
| // call __tls_get_addr --> nop |
| elfcpp::Swap<32, true>::writeval(wv, sparc_nop); |
| break; |
| } |
| break; |
| } |
| else |
| { |
| unsigned int got_type = (optimized_type == tls::TLSOPT_TO_IE |
| ? GOT_TYPE_TLS_OFFSET |
| : GOT_TYPE_TLS_PAIR); |
| if (gsym != NULL) |
| { |
| gold_assert(gsym->has_got_offset(got_type)); |
| value = gsym->got_offset(got_type); |
| } |
| else |
| { |
| unsigned int r_sym = elfcpp::elf_r_sym<size>(rela.get_r_info()); |
| gold_assert(object->local_has_got_offset(r_sym, got_type)); |
| value = object->local_got_offset(r_sym, got_type); |
| } |
| if (optimized_type == tls::TLSOPT_TO_IE) |
| { |
| Insntype* wv = reinterpret_cast<Insntype*>(view); |
| Insntype val; |
| |
| switch (r_type) |
| { |
| case elfcpp::R_SPARC_TLS_GD_HI22: |
| // TLS_GD_HI22 --> TLS_IE_HI22 |
| Reloc::hi22(view, value, addend); |
| break; |
| |
| case elfcpp::R_SPARC_TLS_GD_LO10: |
| // TLS_GD_LO10 --> TLS_IE_LO10 |
| Reloc::lo10(view, value, addend); |
| break; |
| |
| case elfcpp::R_SPARC_TLS_GD_ADD: |
| // add %reg1, %reg2, %reg3 --> ld [%reg1 + %reg2], %reg3 |
| val = elfcpp::Swap<32, true>::readval(wv); |
| |
| if (size == 64) |
| val |= 0xc0580000; |
| else |
| val |= 0xc0000000; |
| |
| elfcpp::Swap<32, true>::writeval(wv, val); |
| break; |
| |
| case elfcpp::R_SPARC_TLS_GD_CALL: |
| // The compiler can put the TLS_GD_ADD instruction |
| // into the delay slot of the call. If so, we need |
| // to transpose the two instructions so that the |
| // new sequence works properly. |
| // |
| // The test we use is if the instruction in the |
| // delay slot is an add with destination register |
| // equal to %o0 |
| val = elfcpp::Swap<32, true>::readval(wv + 1); |
| if ((val & 0x81f80000) == 0x80000000 |
| && ((val >> 25) & 0x1f) == 0x8) |
| { |
| if (size == 64) |
| val |= 0xc0580000; |
| else |
| val |= 0xc0000000; |
| |
| elfcpp::Swap<32, true>::writeval(wv, val); |
| |
| wv += 1; |
| this->ignore_gd_add_ = true; |
| } |
| else |
| { |
| // Even if the delay slot isn't the TLS_GD_ADD |
| // instruction, we still have to handle the case |
| // where it sets up %o0 in some other way. |
| elfcpp::Swap<32, true>::writeval(wv, val); |
| wv += 1; |
| this->reloc_adjust_addr_ = view + 4; |
| } |
| // call __tls_get_addr --> add %g7, %o0, %o0 |
| elfcpp::Swap<32, true>::writeval(wv, 0x9001c008); |
| break; |
| } |
| break; |
| } |
| else if (optimized_type == tls::TLSOPT_NONE) |
| { |
| switch (r_type) |
| { |
| case elfcpp::R_SPARC_TLS_GD_HI22: |
| Reloc::hi22(view, value, addend); |
| break; |
| case elfcpp::R_SPARC_TLS_GD_LO10: |
| Reloc::lo10(view, value, addend); |
| break; |
| case elfcpp::R_SPARC_TLS_GD_ADD: |
| break; |
| case elfcpp::R_SPARC_TLS_GD_CALL: |
| { |
| Symbol_value<size> symval; |
| elfcpp::Elf_Xword value; |
| Symbol* tsym; |
| |
| tsym = target->tls_get_addr_sym_; |
| gold_assert(tsym); |
| value = (target->plt_section()->address() + |
| tsym->plt_offset()); |
| symval.set_output_value(value); |
| Reloc::wdisp30(view, object, &symval, addend, address); |
| } |
| break; |
| } |
| break; |
| } |
| } |
| gold_error_at_location(relinfo, relnum, rela.get_r_offset(), |
| _("unsupported reloc %u"), |
| r_type); |
| break; |
| |
| case elfcpp::R_SPARC_TLS_LDM_HI22: |
| case elfcpp::R_SPARC_TLS_LDM_LO10: |
| case elfcpp::R_SPARC_TLS_LDM_ADD: |
| case elfcpp::R_SPARC_TLS_LDM_CALL: |
| if (optimized_type == tls::TLSOPT_TO_LE) |
| { |
| Insntype* wv = reinterpret_cast<Insntype*>(view); |
| |
| switch (r_type) |
| { |
| case elfcpp::R_SPARC_TLS_LDM_HI22: |
| case elfcpp::R_SPARC_TLS_LDM_LO10: |
| case elfcpp::R_SPARC_TLS_LDM_ADD: |
| elfcpp::Swap<32, true>::writeval(wv, sparc_nop); |
| break; |
| |
| case elfcpp::R_SPARC_TLS_LDM_CALL: |
| elfcpp::Swap<32, true>::writeval(wv, sparc_mov_g0_o0); |
| break; |
| } |
| break; |
| } |
| else if (optimized_type == tls::TLSOPT_NONE) |
| { |
| // Relocate the field with the offset of the GOT entry for |
| // the module index. |
| unsigned int got_offset; |
| |
| got_offset = target->got_mod_index_entry(NULL, NULL, NULL); |
| switch (r_type) |
| { |
| case elfcpp::R_SPARC_TLS_LDM_HI22: |
| Reloc::hi22(view, got_offset, addend); |
| break; |
| case elfcpp::R_SPARC_TLS_LDM_LO10: |
| Reloc::lo10(view, got_offset, addend); |
| break; |
| case elfcpp::R_SPARC_TLS_LDM_ADD: |
| break; |
| case elfcpp::R_SPARC_TLS_LDM_CALL: |
| { |
| Symbol_value<size> symval; |
| elfcpp::Elf_Xword value; |
| Symbol* tsym; |
| |
| tsym = target->tls_get_addr_sym_; |
| gold_assert(tsym); |
| value = (target->plt_section()->address() + |
| tsym->plt_offset()); |
| symval.set_output_value(value); |
| Reloc::wdisp30(view, object, &symval, addend, address); |
| } |
| break; |
| } |
| break; |
| } |
| gold_error_at_location(relinfo, relnum, rela.get_r_offset(), |
| _("unsupported reloc %u"), |
| r_type); |
| break; |
| |
| // These relocs can appear in debugging sections, in which case |
| // we won't see the TLS_LDM relocs. The local_dynamic_type |
| // field tells us this. |
| case elfcpp::R_SPARC_TLS_LDO_HIX22: |
| if (optimized_type == tls::TLSOPT_TO_LE) |
| { |
| value -= tls_segment->memsz(); |
| Reloc::hix22(view, value, addend); |
| } |
| else |
| Reloc::ldo_hix22(view, value, addend); |
| break; |
| case elfcpp::R_SPARC_TLS_LDO_LOX10: |
| if (optimized_type == tls::TLSOPT_TO_LE) |
| { |
| value -= tls_segment->memsz(); |
| Reloc::lox10(view, value, addend); |
| } |
| else |
| Reloc::ldo_lox10(view, value, addend); |
| break; |
| case elfcpp::R_SPARC_TLS_LDO_ADD: |
| if (optimized_type == tls::TLSOPT_TO_LE) |
| { |
| Insntype* wv = reinterpret_cast<Insntype*>(view); |
| Insntype val; |
| |
| // add %reg1, %reg2, %reg3 --> add %g7, %reg2, %reg3 |
| val = elfcpp::Swap<32, true>::readval(wv); |
| val = (val & ~0x7c000) | 0x1c000; |
| elfcpp::Swap<32, true>::writeval(wv, val); |
| } |
| break; |
| |
| // When optimizing IE --> LE, the only relocation that is handled |
| // differently is R_SPARC_TLS_IE_LD, it is rewritten from |
| // 'ld{,x} [rs1 + rs2], rd' into 'mov rs2, rd' or simply a NOP is |
| // rs2 and rd are the same. |
| case elfcpp::R_SPARC_TLS_IE_LD: |
| case elfcpp::R_SPARC_TLS_IE_LDX: |
| if (optimized_type == tls::TLSOPT_TO_LE) |
| { |
| Insntype* wv = reinterpret_cast<Insntype*>(view); |
| Insntype val = elfcpp::Swap<32, true>::readval(wv); |
| Insntype rs2 = val & 0x1f; |
| Insntype rd = (val >> 25) & 0x1f; |
| |
| if (rs2 == rd) |
| val = sparc_nop; |
| else |
| val = sparc_mov | (val & 0x3e00001f); |
| |
| elfcpp::Swap<32, true>::writeval(wv, val); |
| } |
| break; |
| |
| case elfcpp::R_SPARC_TLS_IE_HI22: |
| case elfcpp::R_SPARC_TLS_IE_LO10: |
| if (optimized_type == tls::TLSOPT_TO_LE) |
| { |
| value -= tls_segment->memsz(); |
| switch (r_type) |
| { |
| case elfcpp::R_SPARC_TLS_IE_HI22: |
| // IE_HI22 --> LE_HIX22 |
| Reloc::hix22(view, value, addend); |
| break; |
| case elfcpp::R_SPARC_TLS_IE_LO10: |
| // IE_LO10 --> LE_LOX10 |
| Reloc::lox10(view, value, addend); |
| break; |
| } |
| break; |
| } |
| else if (optimized_type == tls::TLSOPT_NONE) |
| { |
| // Relocate the field with the offset of the GOT entry for |
| // the tp-relative offset of the symbol. |
| if (gsym != NULL) |
| { |
| gold_assert(gsym->has_got_offset(GOT_TYPE_TLS_OFFSET)); |
| value = gsym->got_offset(GOT_TYPE_TLS_OFFSET); |
| } |
| else |
| { |
| unsigned int r_sym = elfcpp::elf_r_sym<size>(rela.get_r_info()); |
| gold_assert(object->local_has_got_offset(r_sym, |
| GOT_TYPE_TLS_OFFSET)); |
| value = object->local_got_offset(r_sym, |
| GOT_TYPE_TLS_OFFSET); |
| } |
| switch (r_type) |
| { |
| case elfcpp::R_SPARC_TLS_IE_HI22: |
| Reloc::hi22(view, value, addend); |
| break; |
| case elfcpp::R_SPARC_TLS_IE_LO10: |
| Reloc::lo10(view, value, addend); |
| break; |
| } |
| break; |
| } |
| gold_error_at_location(relinfo, relnum, rela.get_r_offset(), |
| _("unsupported reloc %u"), |
| r_type); |
| break; |
| |
| case elfcpp::R_SPARC_TLS_IE_ADD: |
| // This seems to be mainly so that we can find the addition |
| // instruction if there is one. There doesn't seem to be any |
| // actual relocation to apply. |
| break; |
| |
| case elfcpp::R_SPARC_TLS_LE_HIX22: |
| // If we're creating a shared library, a dynamic relocation will |
| // have been created for this location, so do not apply it now. |
| if (!parameters->options().shared()) |
| { |
| value -= tls_segment->memsz(); |
| Reloc::hix22(view, value, addend); |
| } |
| break; |
| |
| case elfcpp::R_SPARC_TLS_LE_LOX10: |
| // If we're creating a shared library, a dynamic relocation will |
| // have been created for this location, so do not apply it now. |
| if (!parameters->options().shared()) |
| { |
| value -= tls_segment->memsz(); |
| Reloc::lox10(view, value, addend); |
| } |
| break; |
| } |
| } |
| |
| // Relax a call instruction. |
| |
| template<int size, bool big_endian> |
| inline void |
| Target_sparc<size, big_endian>::Relocate::relax_call( |
| Target_sparc<size, big_endian>* target, |
| unsigned char* view, |
| const elfcpp::Rela<size, big_endian>& rela, |
| section_size_type view_size) |
| { |
| typedef typename elfcpp::Swap<32, true>::Valtype Insntype; |
| Insntype *wv = reinterpret_cast<Insntype*>(view); |
| Insntype call_insn, delay_insn, set_insn; |
| uint32_t op3, reg, off; |
| |
| // This code tries to relax call instructions that meet |
| // certain criteria. |
| // |
| // The first criteria is that the call must be such that the return |
| // address which the call writes into %o7 is unused. Two sequences |
| // meet this criteria, and are used to implement tail calls. |
| // |
| // Leaf function tail call: |
| // |
| // or %o7, %g0, %ANY_REG |
| // call FUNC |
| // or %ANY_REG, %g0, %o7 |
| // |
| // Non-leaf function tail call: |
| // |
| // call FUNC |
| // restore |
| // |
| // The second criteria is that the call destination is close. If |
| // the displacement can fit in a signed 22-bit immediate field of a |
| // pre-V9 branch, we can do it. If we are generating a 64-bit |
| // object or a 32-bit object with ELF machine type EF_SPARC32PLUS, |
| // and the displacement fits in a signed 19-bit immediate field, |
| // then we can use a V9 branch. |
| |
| // Make sure the delay instruction can be safely accessed. |
| if (rela.get_r_offset() + 8 > view_size) |
| return; |
| |
| call_insn = elfcpp::Swap<32, true>::readval(wv); |
| delay_insn = elfcpp::Swap<32, true>::readval(wv + 1); |
| |
| // Make sure it is really a call instruction. |
| if (((call_insn >> 30) & 0x3) != 1) |
| return; |
| |
| if (((delay_insn >> 30) & 0x3) != 2) |
| return; |
| |
| // Accept only a restore or an integer arithmetic operation whose |
| // sole side effect is to write the %o7 register (and perhaps set |
| // the condition codes, which are considered clobbered across |
| // function calls). |
| // |
| // For example, we don't want to match a tagged addition or |
| // subtraction. We also don't want to match something like a |
| // divide. |
| // |
| // Specifically we accept add{,cc}, and{,cc}, or{,cc}, |
| // xor{,cc}, sub{,cc}, andn{,cc}, orn{,cc}, and xnor{,cc}. |
| |
| op3 = (delay_insn >> 19) & 0x3f; |
| reg = (delay_insn >> 25) & 0x1f; |
| if (op3 != 0x3d |
| && ((op3 & 0x28) != 0 || reg != 15)) |
| return; |
| |
| // For non-restore instructions, make sure %o7 isn't |
| // an input. |
| if (op3 != 0x3d) |
| { |
| // First check RS1 |
| reg = (delay_insn >> 14) & 0x1f; |
| if (reg == 15) |
| return; |
| |
| // And if non-immediate, check RS2 |
| if (((delay_insn >> 13) & 1) == 0) |
| { |
| reg = (delay_insn & 0x1f); |
| if (reg == 15) |
| return; |
| } |
| } |
| |
| // Now check the branch distance. We are called after the |
| // call has been relocated, so we just have to peek at the |
| // offset contained in the instruction. |
| off = call_insn & 0x3fffffff; |
| if ((off & 0x3fe00000) != 0 |
| && (off & 0x3fe00000) != 0x3fe00000) |
| return; |
| |
| if ((size == 64 || target->elf_machine_ == elfcpp::EM_SPARC32PLUS) |
| && ((off & 0x3c0000) == 0 |
| || (off & 0x3c0000) == 0x3c0000)) |
| { |
| // ba,pt %xcc, FUNC |
| call_insn = 0x10680000 | (off & 0x07ffff); |
| } |
| else |
| { |
| // ba FUNC |
| call_insn = 0x10800000 | (off & 0x3fffff); |
| } |
| elfcpp::Swap<32, true>::writeval(wv, call_insn); |
| |
| // See if we can NOP out the delay slot instruction. We peek |
| // at the instruction before the call to make sure we're dealing |
| // with exactly the: |
| // |
| // or %o7, %g0, %ANY_REG |
| // call |
| // or %ANY_REG, %g0, %o7 |
| // |
| // case. Otherwise this might be a tricky piece of hand written |
| // assembler calculating %o7 in some non-trivial way, and therefore |
| // we can't be sure that NOP'ing out the delay slot is safe. |
| if (op3 == 0x02 |
| && rela.get_r_offset() >= 4) |
| { |
| if ((delay_insn & ~(0x1f << 14)) != 0x9e100000) |
| return; |
| |
| set_insn = elfcpp::Swap<32, true>::readval(wv - 1); |
| if ((set_insn & ~(0x1f << 25)) != 0x8013c000) |
| return; |
| |
| reg = (set_insn >> 25) & 0x1f; |
| if (reg == 0 || reg == 15) |
| return; |
| if (reg != ((delay_insn >> 14) & 0x1f)) |
| return; |
| |
| // All tests pass, nop it out. |
| elfcpp::Swap<32, true>::writeval(wv + 1, sparc_nop); |
| } |
| } |
| |
| // Relocate section data. |
| |
| template<int size, bool big_endian> |
| void |
| Target_sparc<size, big_endian>::relocate_section( |
| const Relocate_info<size, big_endian>* relinfo, |
| unsigned int sh_type, |
| const unsigned char* prelocs, |
| size_t reloc_count, |
| Output_section* output_section, |
| bool needs_special_offset_handling, |
| unsigned char* view, |
| typename elfcpp::Elf_types<size>::Elf_Addr address, |
| section_size_type view_size, |
| const Reloc_symbol_changes* reloc_symbol_changes) |
| { |
| typedef Target_sparc<size, big_endian> Sparc; |
| typedef typename Target_sparc<size, big_endian>::Relocate Sparc_relocate; |
| typedef gold::Default_classify_reloc<elfcpp::SHT_RELA, size, big_endian> |
| Classify_reloc; |
| |
| gold_assert(sh_type == elfcpp::SHT_RELA); |
| |
| gold::relocate_section<size, big_endian, Sparc, Sparc_relocate, |
| gold::Default_comdat_behavior, Classify_reloc>( |
| relinfo, |
| this, |
| prelocs, |
| reloc_count, |
| output_section, |
| needs_special_offset_handling, |
| view, |
| address, |
| view_size, |
| reloc_symbol_changes); |
| } |
| |
| // 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) |
| { |
| typedef gold::Default_classify_reloc<elfcpp::SHT_RELA, size, big_endian> |
| Classify_reloc; |
| typedef gold::Default_scan_relocatable_relocs<Classify_reloc> |
| Scan_relocatable_relocs; |
| |
| gold_assert(sh_type == elfcpp::SHT_RELA); |
| |
| gold::scan_relocatable_relocs<size, big_endian, Scan_relocatable_relocs>( |
| symtab, |
| layout, |
| object, |
| data_shndx, |
| prelocs, |
| reloc_count, |
| output_section, |
| needs_special_offset_handling, |
| local_symbol_count, |
| plocal_symbols, |
| rr); |
| } |
| |
| // Scan the relocs for --emit-relocs. |
| |
| template<int size, bool big_endian> |
| void |
| Target_sparc<size, big_endian>::emit_relocs_scan( |
| 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_syms, |
| Relocatable_relocs* rr) |
| { |
| typedef gold::Default_classify_reloc<elfcpp::SHT_RELA, size, big_endian> |
| Classify_reloc; |
| typedef gold::Default_emit_relocs_strategy<Classify_reloc> |
| Emit_relocs_strategy; |
| |
| gold_assert(sh_type == elfcpp::SHT_RELA); |
| |
| gold::scan_relocatable_relocs<size, big_endian, Emit_relocs_strategy>( |
| symtab, |
| layout, |
| object, |
| data_shndx, |
| prelocs, |
| reloc_count, |
| output_section, |
| needs_special_offset_handling, |
| local_symbol_count, |
| plocal_syms, |
| rr); |
| } |
| |
| // Emit relocations for a section. |
| |
| template<int size, bool big_endian> |
| void |
| Target_sparc<size, big_endian>::relocate_relocs( |
| const Relocate_info<size, big_endian>* relinfo, |
| unsigned int sh_type, |
| const unsigned char* prelocs, |
| size_t reloc_count, |
| Output_section* output_section, |
| typename elfcpp::Elf_types<size>::Elf_Off offset_in_output_section, |
| 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) |
| { |
| typedef gold::Default_classify_reloc<elfcpp::SHT_RELA, size, big_endian> |
| Classify_reloc; |
| |
| gold_assert(sh_type == elfcpp::SHT_RELA); |
| |
| gold::relocate_relocs<size, big_endian, Classify_reloc>( |
| relinfo, |
| prelocs, |
| reloc_count, |
| output_section, |
| offset_in_output_section, |
| view, |
| view_address, |
| view_size, |
| reloc_view, |
| reloc_view_size); |
| } |
| |
| // Return the value to use for a dynamic which requires special |
| // treatment. This is how we support equality comparisons of function |
| // pointers across shared library boundaries, as described in the |
| // processor specific ABI supplement. |
| |
| template<int size, bool big_endian> |
| uint64_t |
| Target_sparc<size, big_endian>::do_dynsym_value(const Symbol* gsym) const |
| { |
| gold_assert(gsym->is_from_dynobj() && gsym->has_plt_offset()); |
| return this->plt_section()->address() + gsym->plt_offset(); |
| } |
| |
| // do_make_elf_object to override the same function in the base class. |
| // We need to use a target-specific sub-class of |
| // Sized_relobj_file<size, big_endian> to process SPARC specific bits |
| // of the ELF headers. Hence we need to have our own ELF object creation. |
| |
| template<int size, bool big_endian> |
| Object* |
| Target_sparc<size, big_endian>::do_make_elf_object( |
| const std::string& name, |
| Input_file* input_file, |
| off_t offset, const elfcpp::Ehdr<size, big_endian>& ehdr) |
| { |
| elfcpp::Elf_Half machine = ehdr.get_e_machine(); |
| elfcpp::Elf_Word flags = ehdr.get_e_flags(); |
| elfcpp::Elf_Word omm, mm; |
| |
| switch (machine) |
| { |
| case elfcpp::EM_SPARC32PLUS: |
| this->elf_machine_ = elfcpp::EM_SPARC32PLUS; |
| break; |
| |
| case elfcpp::EM_SPARC: |
| case elfcpp::EM_SPARCV9: |
| break; |
| |
| default: |
| break; |
| } |
| |
| if (!this->elf_flags_set_) |
| { |
| this->elf_flags_ = flags; |
| this->elf_flags_set_ = true; |
| } |
| else |
| { |
| // Accumulate cpu feature bits. |
| this->elf_flags_ |= (flags & (elfcpp::EF_SPARC_32PLUS |
| | elfcpp::EF_SPARC_SUN_US1 |
| | elfcpp::EF_SPARC_HAL_R1 |
| | elfcpp::EF_SPARC_SUN_US3)); |
| |
| // Bump the memory model setting to the most restrictive |
| // one we encounter. |
| omm = (this->elf_flags_ & elfcpp::EF_SPARCV9_MM); |
| mm = (flags & elfcpp::EF_SPARCV9_MM); |
| if (omm != mm) |
| { |
| if (mm == elfcpp::EF_SPARCV9_TSO) |
| { |
| this->elf_flags_ &= ~elfcpp::EF_SPARCV9_MM; |
| this->elf_flags_ |= elfcpp::EF_SPARCV9_TSO; |
| } |
| else if (mm == elfcpp::EF_SPARCV9_PSO |
| && omm == elfcpp::EF_SPARCV9_RMO) |
| { |
| this->elf_flags_ &= ~elfcpp::EF_SPARCV9_MM; |
| this->elf_flags_ |= elfcpp::EF_SPARCV9_PSO; |
| } |
| } |
| } |
| |
| // Validate that the little-endian flag matches how we've |
| // been instantiated. |
| if (!(flags & elfcpp::EF_SPARC_LEDATA) != big_endian) |
| { |
| if (big_endian) |
| gold_error(_("%s: little endian elf flag set on BE object"), |
| name.c_str()); |
| else |
| gold_error(_("%s: little endian elf flag clear on LE object"), |
| name.c_str()); |
| } |
| |
| return Target::do_make_elf_object(name, input_file, offset, ehdr); |
| } |
| |
| // Adjust ELF file header. |
| |
| template<int size, bool big_endian> |
| void |
| Target_sparc<size, big_endian>::do_adjust_elf_header( |
| unsigned char* view, |
| int len) |
| { |
| elfcpp::Ehdr_write<size, big_endian> oehdr(view); |
| |
| oehdr.put_e_machine(this->elf_machine_); |
| oehdr.put_e_flags(this->elf_flags_); |
| |
| Sized_target<size, big_endian>::do_adjust_elf_header(view, len); |
| } |
| |
| // The selector for sparc object files. |
| |
| template<int size, bool big_endian> |
| class Target_selector_sparc : public Target_selector |
| { |
| public: |
| Target_selector_sparc() |
| : Target_selector(elfcpp::EM_NONE, size, big_endian, |
| (size == 64 ? "elf64-sparc" : "elf32-sparc"), |
| (size == 64 ? "elf64_sparc" : "elf32_sparc")) |
| { } |
| |
| virtual Target* |
| do_recognize(Input_file*, off_t, int machine, int, int) |
| { |
| switch (size) |
| { |
| case 64: |
| if (machine != elfcpp::EM_SPARCV9) |
| return NULL; |
| break; |
| |
| case 32: |
| if (machine != elfcpp::EM_SPARC |
| && machine != elfcpp::EM_SPARC32PLUS) |
| return NULL; |
| break; |
| |
| default: |
| return NULL; |
| } |
| |
| return this->instantiate_target(); |
| } |
| |
| virtual Target* |
| do_instantiate_target() |
| { return new Target_sparc<size, big_endian>(); } |
| }; |
| |
| Target_selector_sparc<32, true> target_selector_sparc32; |
| Target_selector_sparc<64, true> target_selector_sparc64; |
| |
| } // End anonymous namespace. |
