1db6b60c78e9837568d1183262947d74c3219a554Bill Wendling//=== MachORelocation.h - Mach-O Relocation Info ----------------*- C++ -*-===// 2db6b60c78e9837568d1183262947d74c3219a554Bill Wendling// 3db6b60c78e9837568d1183262947d74c3219a554Bill Wendling// The LLVM Compiler Infrastructure 4db6b60c78e9837568d1183262947d74c3219a554Bill Wendling// 57ed47a13356daed2a34cd2209a31f92552e3bdd8Chris Lattner// This file is distributed under the University of Illinois Open Source 67ed47a13356daed2a34cd2209a31f92552e3bdd8Chris Lattner// License. See LICENSE.TXT for details. 7db6b60c78e9837568d1183262947d74c3219a554Bill Wendling// 8db6b60c78e9837568d1183262947d74c3219a554Bill Wendling//===----------------------------------------------------------------------===// 9db6b60c78e9837568d1183262947d74c3219a554Bill Wendling// 10db6b60c78e9837568d1183262947d74c3219a554Bill Wendling// This file defines the MachORelocation class. 11db6b60c78e9837568d1183262947d74c3219a554Bill Wendling// 12db6b60c78e9837568d1183262947d74c3219a554Bill Wendling//===----------------------------------------------------------------------===// 13db6b60c78e9837568d1183262947d74c3219a554Bill Wendling 14db6b60c78e9837568d1183262947d74c3219a554Bill Wendling 15db6b60c78e9837568d1183262947d74c3219a554Bill Wendling#ifndef LLVM_CODEGEN_MACHO_RELOCATION_H 16db6b60c78e9837568d1183262947d74c3219a554Bill Wendling#define LLVM_CODEGEN_MACHO_RELOCATION_H 17db6b60c78e9837568d1183262947d74c3219a554Bill Wendling 181f6efa3996dd1929fbc129203ce5009b620e6969Michael J. Spencer#include "llvm/Support/DataTypes.h" 190c8ae782cb966068f8317f8225633e2f4720ccb7Douglas Gregor 20db6b60c78e9837568d1183262947d74c3219a554Bill Wendlingnamespace llvm { 21db6b60c78e9837568d1183262947d74c3219a554Bill Wendling 22db6b60c78e9837568d1183262947d74c3219a554Bill Wendling /// MachORelocation - This struct contains information about each relocation 23db6b60c78e9837568d1183262947d74c3219a554Bill Wendling /// that needs to be emitted to the file. 24db6b60c78e9837568d1183262947d74c3219a554Bill Wendling /// see <mach-o/reloc.h> 25db6b60c78e9837568d1183262947d74c3219a554Bill Wendling class MachORelocation { 26db6b60c78e9837568d1183262947d74c3219a554Bill Wendling uint32_t r_address; // offset in the section to what is being relocated 27db6b60c78e9837568d1183262947d74c3219a554Bill Wendling uint32_t r_symbolnum; // symbol index if r_extern == 1 else section index 28db6b60c78e9837568d1183262947d74c3219a554Bill Wendling bool r_pcrel; // was relocated pc-relative already 29db6b60c78e9837568d1183262947d74c3219a554Bill Wendling uint8_t r_length; // length = 2 ^ r_length 30db6b60c78e9837568d1183262947d74c3219a554Bill Wendling bool r_extern; // 31db6b60c78e9837568d1183262947d74c3219a554Bill Wendling uint8_t r_type; // if not 0, machine-specific relocation type. 32db6b60c78e9837568d1183262947d74c3219a554Bill Wendling bool r_scattered; // 1 = scattered, 0 = non-scattered 33db6b60c78e9837568d1183262947d74c3219a554Bill Wendling int32_t r_value; // the value the item to be relocated is referring 34db6b60c78e9837568d1183262947d74c3219a554Bill Wendling // to. 35db6b60c78e9837568d1183262947d74c3219a554Bill Wendling public: 36db6b60c78e9837568d1183262947d74c3219a554Bill Wendling uint32_t getPackedFields() const { 37db6b60c78e9837568d1183262947d74c3219a554Bill Wendling if (r_scattered) 38db6b60c78e9837568d1183262947d74c3219a554Bill Wendling return (1 << 31) | (r_pcrel << 30) | ((r_length & 3) << 28) | 39db6b60c78e9837568d1183262947d74c3219a554Bill Wendling ((r_type & 15) << 24) | (r_address & 0x00FFFFFF); 40db6b60c78e9837568d1183262947d74c3219a554Bill Wendling else 41db6b60c78e9837568d1183262947d74c3219a554Bill Wendling return (r_symbolnum << 8) | (r_pcrel << 7) | ((r_length & 3) << 5) | 42db6b60c78e9837568d1183262947d74c3219a554Bill Wendling (r_extern << 4) | (r_type & 15); 43db6b60c78e9837568d1183262947d74c3219a554Bill Wendling } 44db6b60c78e9837568d1183262947d74c3219a554Bill Wendling uint32_t getAddress() const { return r_scattered ? r_value : r_address; } 45db6b60c78e9837568d1183262947d74c3219a554Bill Wendling uint32_t getRawAddress() const { return r_address; } 46db6b60c78e9837568d1183262947d74c3219a554Bill Wendling 47db6b60c78e9837568d1183262947d74c3219a554Bill Wendling MachORelocation(uint32_t addr, uint32_t index, bool pcrel, uint8_t len, 48db6b60c78e9837568d1183262947d74c3219a554Bill Wendling bool ext, uint8_t type, bool scattered = false, 49db6b60c78e9837568d1183262947d74c3219a554Bill Wendling int32_t value = 0) : 50db6b60c78e9837568d1183262947d74c3219a554Bill Wendling r_address(addr), r_symbolnum(index), r_pcrel(pcrel), r_length(len), 51db6b60c78e9837568d1183262947d74c3219a554Bill Wendling r_extern(ext), r_type(type), r_scattered(scattered), r_value(value) {} 52db6b60c78e9837568d1183262947d74c3219a554Bill Wendling }; 53db6b60c78e9837568d1183262947d74c3219a554Bill Wendling 54db6b60c78e9837568d1183262947d74c3219a554Bill Wendling} // end llvm namespace 55db6b60c78e9837568d1183262947d74c3219a554Bill Wendling 56db6b60c78e9837568d1183262947d74c3219a554Bill Wendling#endif // LLVM_CODEGEN_MACHO_RELOCATION_H 57