| // reloc.h -- relocate input files for gold -*- C++ -*- |
| |
| #ifndef GOLD_RELOC_H |
| #define GOLD_RELOC_H |
| |
| #include <byteswap.h> |
| |
| #include "workqueue.h" |
| |
| namespace gold |
| { |
| |
| class Relobj; |
| class Read_relocs_data; |
| class Stringpool; |
| class Layout; |
| |
| // A class to read the relocations for an object file, and then queue |
| // up a task to see if they require any GOT/PLT/COPY relocations in |
| // the symbol table. |
| |
| class Read_relocs : public Task |
| { |
| public: |
| // SYMTAB_LOCK is used to lock the symbol table. BLOCKER should be |
| // unblocked when the Scan_relocs task completes. |
| Read_relocs(const General_options& options, Symbol_table* symtab, |
| Layout* layout, Relobj* object, Task_token* symtab_lock, |
| Task_token* blocker) |
| : options_(options), symtab_(symtab), layout_(layout), object_(object), |
| symtab_lock_(symtab_lock), blocker_(blocker) |
| { } |
| |
| // The standard Task methods. |
| |
| Is_runnable_type |
| is_runnable(Workqueue*); |
| |
| Task_locker* |
| locks(Workqueue*); |
| |
| void |
| run(Workqueue*); |
| |
| private: |
| const General_options& options_; |
| Symbol_table* symtab_; |
| Layout* layout_; |
| Relobj* object_; |
| Task_token* symtab_lock_; |
| Task_token* blocker_; |
| }; |
| |
| // Scan the relocations for an object to see if they require any |
| // GOT/PLT/COPY relocations. |
| |
| class Scan_relocs : public Task |
| { |
| public: |
| // SYMTAB_LOCK is used to lock the symbol table. BLOCKER should be |
| // unblocked when the task completes. |
| Scan_relocs(const General_options& options, Symbol_table* symtab, |
| Layout* layout, Relobj* object, Read_relocs_data* rd, |
| Task_token* symtab_lock, Task_token* blocker) |
| : options_(options), symtab_(symtab), layout_(layout), object_(object), |
| rd_(rd), symtab_lock_(symtab_lock), blocker_(blocker) |
| { } |
| |
| // The standard Task methods. |
| |
| Is_runnable_type |
| is_runnable(Workqueue*); |
| |
| Task_locker* |
| locks(Workqueue*); |
| |
| void |
| run(Workqueue*); |
| |
| private: |
| class Scan_relocs_locker; |
| |
| const General_options& options_; |
| Symbol_table* symtab_; |
| Layout* layout_; |
| Relobj* object_; |
| Read_relocs_data* rd_; |
| Task_token* symtab_lock_; |
| Task_token* blocker_; |
| }; |
| |
| // A class to perform all the relocations for an object file. |
| |
| class Relocate_task : public Task |
| { |
| public: |
| Relocate_task(const General_options& options, const Symbol_table* symtab, |
| const Layout* layout, Relobj* object, Output_file* of, |
| Task_token* final_blocker) |
| : options_(options), symtab_(symtab), layout_(layout), object_(object), |
| of_(of), final_blocker_(final_blocker) |
| { } |
| |
| // The standard Task methods. |
| |
| Is_runnable_type |
| is_runnable(Workqueue*); |
| |
| Task_locker* |
| locks(Workqueue*); |
| |
| void |
| run(Workqueue*); |
| |
| private: |
| class Relocate_locker; |
| |
| const General_options& options_; |
| const Symbol_table* symtab_; |
| const Layout* layout_; |
| Relobj* object_; |
| Output_file* of_; |
| Task_token* final_blocker_; |
| }; |
| |
| // Standard relocation routines which are used on many targets. Here |
| // SIZE and BIG_ENDIAN refer to the target, not the relocation type. |
| |
| template<int size, bool big_endian> |
| class Relocate_functions |
| { |
| private: |
| // Do a simple relocation with the addend in the section contents. |
| // VALSIZE is the size of the value. |
| template<int valsize> |
| static inline void |
| rel(unsigned char* view, |
| typename elfcpp::Swap<valsize, big_endian>::Valtype value) |
| { |
| typedef typename elfcpp::Swap<valsize, big_endian>::Valtype Valtype; |
| Valtype* wv = reinterpret_cast<Valtype*>(view); |
| Valtype x = elfcpp::Swap<valsize, big_endian>::readval(wv); |
| elfcpp::Swap<valsize, big_endian>::writeval(wv, x + value); |
| } |
| |
| // Do a simple PC relative relocation with the addend in the section |
| // contents. VALSIZE is the size of the value. |
| template<int valsize> |
| static inline void |
| pcrel(unsigned char* view, |
| typename elfcpp::Swap<valsize, big_endian>::Valtype value, |
| typename elfcpp::Elf_types<size>::Elf_Addr address) |
| { |
| typedef typename elfcpp::Swap<valsize, big_endian>::Valtype Valtype; |
| Valtype* wv = reinterpret_cast<Valtype*>(view); |
| Valtype x = elfcpp::Swap<valsize, big_endian>::readval(wv); |
| elfcpp::Swap<valsize, big_endian>::writeval(wv, x + value - address); |
| } |
| |
| typedef Relocate_functions<size, big_endian> This; |
| |
| public: |
| // Do a simple 8-bit REL relocation with the addend in the object |
| // file data. |
| static inline void |
| rel8(unsigned char* view, unsigned char value) |
| { |
| This::template rel<8>(view, value); |
| } |
| |
| // Do a simple 8-bit PC relative relocation with the addend in the |
| // object file data. |
| static inline void |
| pcrel8(unsigned char* view, unsigned char value, |
| typename elfcpp::Elf_types<size>::Elf_Addr address) |
| { |
| This::template pcrel<8>(view, value, address); |
| } |
| |
| // Do a simple 16-bit REL relocation with the addend in the object |
| // file data. |
| static inline void |
| rel16(unsigned char* view, elfcpp::Elf_Half value) |
| { |
| This::template rel<16>(view, value); |
| } |
| |
| // Do a simple 32-bit PC relative REL relocation with the addend in |
| // the object file data. |
| static inline void |
| pcrel16(unsigned char* view, elfcpp::Elf_Word value, |
| typename elfcpp::Elf_types<size>::Elf_Addr address) |
| { |
| This::template pcrel<16>(view, value, address); |
| } |
| |
| // Do a simple 32-bit REL relocation with the addend in the section |
| // contents. |
| static inline void |
| rel32(unsigned char* view, elfcpp::Elf_Word value) |
| { |
| This::template rel<32>(view, value); |
| } |
| |
| // Do a simple 32-bit PC relative REL relocation with the addend in |
| // the section contents. |
| static inline void |
| pcrel32(unsigned char* view, elfcpp::Elf_Word value, |
| typename elfcpp::Elf_types<size>::Elf_Addr address) |
| { |
| This::template pcrel<32>(view, value, address); |
| } |
| |
| // Do a simple 64-bit REL relocation with the addend in the section |
| // contents. |
| static inline void |
| rel64(unsigned char* view, elfcpp::Elf_Xword value) |
| { |
| This::template rel<64>(view, value); |
| } |
| |
| // Do a simple 64-bit PC relative REL relocation with the addend in |
| // the section contents. |
| static inline void |
| pcrel64(unsigned char* view, elfcpp::Elf_Xword value, |
| typename elfcpp::Elf_types<size>::Elf_Addr address) |
| { |
| This::template pcrel<64>(view, value, address); |
| } |
| }; |
| |
| } // End namespace gold. |
| |
| #endif // !defined(GOLD_RELOC_H) |