llvm/llvm/lib/Target/AArch64/Disassembler/AArch64ExternalSymbolizer.cpp

//===- AArch64ExternalSymbolizer.cpp - Symbolizer for AArch64 ---*- 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
//
//===----------------------------------------------------------------------===//

#include "AArch64ExternalSymbolizer.h"
#include "MCTargetDesc/AArch64AddressingModes.h"
#include "Utils/AArch64BaseInfo.h"
#include "llvm/MC/MCContext.h"
#include "llvm/MC/MCExpr.h"
#include "llvm/MC/MCInst.h"
#include "llvm/MC/MCRegisterInfo.h"
#include "llvm/Support/Format.h"
#include "llvm/Support/raw_ostream.h"

usingnamespacellvm;

#define DEBUG_TYPE …

static MCSymbolRefExpr::VariantKind
getVariant(uint64_t LLVMDisassembler_VariantKind) { … }

/// tryAddingSymbolicOperand - tryAddingSymbolicOperand trys to add a symbolic
/// operand in place of the immediate Value in the MCInst.  The immediate
/// Value has not had any PC adjustment made by the caller. If the instruction
/// is a branch that adds the PC to the immediate Value then isBranch is
/// Success, else Fail. If GetOpInfo is non-null, then it is called to get any
/// symbolic information at the Address for this instrution.  If that returns
/// non-zero then the symbolic information it returns is used to create an
/// MCExpr and that is added as an operand to the MCInst.  If GetOpInfo()
/// returns zero and isBranch is Success then a symbol look up for
/// Address + Value is done and if a symbol is found an MCExpr is created with
/// that, else an MCExpr with Address + Value is created.  If GetOpInfo()
/// returns zero and isBranch is Fail then the Opcode of the MCInst is
/// tested and for ADRP an other instructions that help to load of pointers
/// a symbol look up is done to see it is returns a specific reference type
/// to add to the comment stream.  This function returns Success if it adds
/// an operand to the MCInst and Fail otherwise.
bool AArch64ExternalSymbolizer::tryAddingSymbolicOperand(
    MCInst &MI, raw_ostream &CommentStream, int64_t Value, uint64_t Address,
    bool IsBranch, uint64_t Offset, uint64_t OpSize, uint64_t InstSize) { … }