LLVM  10.0.0svn
MachORelocation.h
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1 //=== MachORelocation.h - Mach-O Relocation Info ----------------*- C++ -*-===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8 //
9 // This file defines the MachORelocation class.
10 //
11 //===----------------------------------------------------------------------===//
12 
13 
14 #ifndef LLVM_CODEGEN_MACHORELOCATION_H
15 #define LLVM_CODEGEN_MACHORELOCATION_H
16 
17 #include "llvm/Support/DataTypes.h"
18 
19 namespace llvm {
20 
21  /// MachORelocation - This struct contains information about each relocation
22  /// that needs to be emitted to the file.
23  /// see <mach-o/reloc.h>
25  uint32_t r_address; // offset in the section to what is being relocated
26  uint32_t r_symbolnum; // symbol index if r_extern == 1 else section index
27  bool r_pcrel; // was relocated pc-relative already
28  uint8_t r_length; // length = 2 ^ r_length
29  bool r_extern; //
30  uint8_t r_type; // if not 0, machine-specific relocation type.
31  bool r_scattered; // 1 = scattered, 0 = non-scattered
32  int32_t r_value; // the value the item to be relocated is referring
33  // to.
34  public:
36  if (r_scattered)
37  return (1 << 31) | (r_pcrel << 30) | ((r_length & 3) << 28) |
38  ((r_type & 15) << 24) | (r_address & 0x00FFFFFF);
39  else
40  return (r_symbolnum << 8) | (r_pcrel << 7) | ((r_length & 3) << 5) |
41  (r_extern << 4) | (r_type & 15);
42  }
43  uint32_t getAddress() const { return r_scattered ? r_value : r_address; }
44  uint32_t getRawAddress() const { return r_address; }
45 
46  MachORelocation(uint32_t addr, uint32_t index, bool pcrel, uint8_t len,
47  bool ext, uint8_t type, bool scattered = false,
48  int32_t value = 0) :
49  r_address(addr), r_symbolnum(index), r_pcrel(pcrel), r_length(len),
50  r_extern(ext), r_type(type), r_scattered(scattered), r_value(value) {}
51  };
52 
53 } // end llvm namespace
54 
55 #endif // LLVM_CODEGEN_MACHORELOCATION_H
uint32_t getRawAddress() const
This class represents lattice values for constants.
Definition: AllocatorList.h:23
uint32_t getAddress() const
MachORelocation(uint32_t addr, uint32_t index, bool pcrel, uint8_t len, bool ext, uint8_t type, bool scattered=false, int32_t value=0)
uint32_t getPackedFields() const
MachORelocation - This struct contains information about each relocation that needs to be emitted to ...