| //=== MachORelocation.h - Mach-O Relocation Info ----------------*- C++ -*-===// | |
| // | |
| // The LLVM Compiler Infrastructure | |
| // | |
| // This file is distributed under the University of Illinois Open Source | |
| // License. See LICENSE.TXT for details. | |
| // | |
| //===----------------------------------------------------------------------===// | |
| // | |
| // This file defines the MachORelocation class. | |
| // | |
| //===----------------------------------------------------------------------===// | |
| #ifndef LLVM_CODEGEN_MACHO_RELOCATION_H | |
| #define LLVM_CODEGEN_MACHO_RELOCATION_H | |
| #include "llvm/Support/DataTypes.h" | |
| namespace llvm { | |
| /// MachORelocation - This struct contains information about each relocation | |
| /// that needs to be emitted to the file. | |
| /// see <mach-o/reloc.h> | |
| class MachORelocation { | |
| uint32_t r_address; // offset in the section to what is being relocated | |
| uint32_t r_symbolnum; // symbol index if r_extern == 1 else section index | |
| bool r_pcrel; // was relocated pc-relative already | |
| uint8_t r_length; // length = 2 ^ r_length | |
| bool r_extern; // | |
| uint8_t r_type; // if not 0, machine-specific relocation type. | |
| bool r_scattered; // 1 = scattered, 0 = non-scattered | |
| int32_t r_value; // the value the item to be relocated is referring | |
| // to. | |
| public: | |
| uint32_t getPackedFields() const { | |
| if (r_scattered) | |
| return (1 << 31) | (r_pcrel << 30) | ((r_length & 3) << 28) | | |
| ((r_type & 15) << 24) | (r_address & 0x00FFFFFF); | |
| else | |
| return (r_symbolnum << 8) | (r_pcrel << 7) | ((r_length & 3) << 5) | | |
| (r_extern << 4) | (r_type & 15); | |
| } | |
| uint32_t getAddress() const { return r_scattered ? r_value : r_address; } | |
| uint32_t getRawAddress() const { return r_address; } | |
| MachORelocation(uint32_t addr, uint32_t index, bool pcrel, uint8_t len, | |
| bool ext, uint8_t type, bool scattered = false, | |
| int32_t value = 0) : | |
| r_address(addr), r_symbolnum(index), r_pcrel(pcrel), r_length(len), | |
| r_extern(ext), r_type(type), r_scattered(scattered), r_value(value) {} | |
| }; | |
| } // end llvm namespace | |
| #endif // LLVM_CODEGEN_MACHO_RELOCATION_H |