| //=== 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 |
