| // Copyright 2019 The Cobalt Authors. All Rights Reserved. |
| // |
| // Licensed under the Apache License, Version 2.0 (the "License"); |
| // you may not use this file except in compliance with the License. |
| // You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| // limitations under the License. |
| |
| #ifndef STARBOARD_ELF_LOADER_RELOCATIONS_H_ |
| #define STARBOARD_ELF_LOADER_RELOCATIONS_H_ |
| |
| #include "starboard/elf_loader/elf.h" |
| |
| #include "starboard/elf_loader/dynamic_section.h" |
| #include "starboard/elf_loader/program_table.h" |
| |
| namespace starboard { |
| namespace elf_loader { |
| |
| enum RelocationType { |
| RELOCATION_TYPE_UNKNOWN = 0, |
| RELOCATION_TYPE_ABSOLUTE = 1, |
| RELOCATION_TYPE_RELATIVE = 2, |
| RELOCATION_TYPE_PC_RELATIVE = 3, |
| RELOCATION_TYPE_COPY = 4, |
| }; |
| |
| // class representing the ELF relocations. |
| class Relocations { |
| public: |
| Relocations(Addr base_memory_adddress, |
| DynamicSection* dynamic_section, |
| ExportedSymbols* exported_symbols); |
| |
| // Initialize the relocation tables. |
| bool InitRelocations(); |
| |
| // Apply all the relocations. |
| bool ApplyAllRelocations(); |
| |
| // Apply a set of relocations. |
| bool ApplyRelocations(const rel_t* rel, size_t rel_count); |
| |
| // Apply an individual relocation. |
| bool ApplyRelocation(const rel_t* rel); |
| |
| // Apply a resolved symbol relocation. |
| #if defined(USE_RELA) |
| bool ApplyResolvedReloc(const Rela* rela, Addr sym_addr); |
| #else |
| bool ApplyResolvedReloc(const Rel* rel, Addr sym_addr); |
| #endif |
| |
| // Convert an ELF relocation type info a RelocationType value. |
| RelocationType GetRelocationType(Word r_type); |
| |
| // Resolve a symbol address. |
| bool ResolveSymbol(Word rel_type, |
| Word rel_symbol, |
| Addr reloc, |
| Addr* sym_addr); |
| |
| // Checks if there are any text relocations. |
| bool HasTextRelocations(); |
| |
| private: |
| Addr base_memory_address_; |
| DynamicSection* dynamic_section_; |
| Addr plt_relocations_; |
| size_t plt_relocations_size_; |
| Addr* plt_got_; |
| |
| Addr relocations_; |
| size_t relocations_size_; |
| |
| bool has_text_relocations_; |
| bool has_symbolic_; |
| |
| ExportedSymbols* exported_symbols_; |
| |
| Relocations(const Relocations&) = delete; |
| void operator=(const Relocations&) = delete; |
| }; |
| |
| } // namespace elf_loader |
| } // namespace starboard |
| |
| #endif // STARBOARD_ELF_LOADER_RELOCATIONS_H_ |