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