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