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| Rev | Author | Line No. | Line |
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| 14 | pmbaty | 1 | //=== MachORelocation.h - Mach-O Relocation Info ----------------*- C++ -*-===// |
| 2 | // |
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| 3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
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| 4 | // See https://llvm.org/LICENSE.txt for license information. |
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| 5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
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| 6 | // |
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| 7 | //===----------------------------------------------------------------------===// |
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| 8 | // |
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| 9 | // This file defines the MachORelocation class. |
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| 10 | // |
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| 11 | //===----------------------------------------------------------------------===// |
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| 12 | |||
| 13 | |||
| 14 | #ifndef LLVM_CODEGEN_MACHORELOCATION_H |
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| 15 | #define LLVM_CODEGEN_MACHORELOCATION_H |
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| 16 | |||
| 17 | #include "llvm/Support/DataTypes.h" |
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| 18 | |||
| 19 | namespace llvm { |
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| 20 | |||
| 21 | /// MachORelocation - This struct contains information about each relocation |
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| 22 | /// that needs to be emitted to the file. |
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| 23 | /// see <mach-o/reloc.h> |
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| 24 | class MachORelocation { |
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| 25 | uint32_t r_address; // offset in the section to what is being relocated |
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| 26 | uint32_t r_symbolnum; // symbol index if r_extern == 1 else section index |
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| 27 | bool r_pcrel; // was relocated pc-relative already |
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| 28 | uint8_t r_length; // length = 2 ^ r_length |
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| 29 | bool r_extern; // |
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| 30 | uint8_t r_type; // if not 0, machine-specific relocation type. |
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| 31 | bool r_scattered; // 1 = scattered, 0 = non-scattered |
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| 32 | int32_t r_value; // the value the item to be relocated is referring |
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| 33 | // to. |
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| 34 | public: |
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| 35 | uint32_t getPackedFields() const { |
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| 36 | if (r_scattered) |
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| 37 | return (1 << 31) | (r_pcrel << 30) | ((r_length & 3) << 28) | |
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| 38 | ((r_type & 15) << 24) | (r_address & 0x00FFFFFF); |
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| 39 | else |
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| 40 | return (r_symbolnum << 8) | (r_pcrel << 7) | ((r_length & 3) << 5) | |
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| 41 | (r_extern << 4) | (r_type & 15); |
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| 42 | } |
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| 43 | uint32_t getAddress() const { return r_scattered ? r_value : r_address; } |
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| 44 | uint32_t getRawAddress() const { return r_address; } |
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| 45 | |||
| 46 | MachORelocation(uint32_t addr, uint32_t index, bool pcrel, uint8_t len, |
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| 47 | bool ext, uint8_t type, bool scattered = false, |
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| 48 | int32_t value = 0) : |
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| 49 | r_address(addr), r_symbolnum(index), r_pcrel(pcrel), r_length(len), |
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| 50 | r_extern(ext), r_type(type), r_scattered(scattered), r_value(value) {} |
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| 51 | }; |
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| 52 | |||
| 53 | } // end llvm namespace |
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| 54 | |||
| 55 | #endif // LLVM_CODEGEN_MACHORELOCATION_H |