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Diffstat (limited to 'llvm/include/llvm/CodeGen/MachORelocation.h')
-rw-r--r-- | llvm/include/llvm/CodeGen/MachORelocation.h | 55 |
1 files changed, 55 insertions, 0 deletions
diff --git a/llvm/include/llvm/CodeGen/MachORelocation.h b/llvm/include/llvm/CodeGen/MachORelocation.h new file mode 100644 index 000000000000..0185c7cbe018 --- /dev/null +++ b/llvm/include/llvm/CodeGen/MachORelocation.h @@ -0,0 +1,55 @@ +//=== MachORelocation.h - Mach-O Relocation Info ----------------*- C++ -*-===// +// +// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. +// See https://llvm.org/LICENSE.txt for license information. +// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception +// +//===----------------------------------------------------------------------===// +// +// This file defines the MachORelocation class. +// +//===----------------------------------------------------------------------===// + + +#ifndef LLVM_CODEGEN_MACHORELOCATION_H +#define LLVM_CODEGEN_MACHORELOCATION_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_MACHORELOCATION_H |