mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-09-02 11:30:10 +00:00
82 lines
3.3 KiB
C
82 lines
3.3 KiB
C
|
//===-- llvm/MC/MCSymbolizer.h - MCSymbolizer class -------------*- C++ -*-===//
|
||
|
//
|
||
|
// The LLVM Compiler Infrastructure
|
||
|
//
|
||
|
// This file is distributed under the University of Illinois Open Source
|
||
|
// License. See LICENSE.TXT for details.
|
||
|
//
|
||
|
//===----------------------------------------------------------------------===//
|
||
|
//
|
||
|
// This file contains the declaration of the MCSymbolizer class, which is used
|
||
|
// to symbolize instructions decoded from an object, that is, transform their
|
||
|
// immediate operands to MCExprs.
|
||
|
//
|
||
|
//===----------------------------------------------------------------------===//
|
||
|
|
||
|
#ifndef LLVM_MC_MCSYMBOLIZER_H
|
||
|
#define LLVM_MC_MCSYMBOLIZER_H
|
||
|
|
||
|
#include "llvm/ADT/OwningPtr.h"
|
||
|
#include "llvm/MC/MCRelocationInfo.h"
|
||
|
#include "llvm/Support/Compiler.h"
|
||
|
#include "llvm/Support/DataTypes.h"
|
||
|
|
||
|
namespace llvm {
|
||
|
|
||
|
class MCContext;
|
||
|
class MCInst;
|
||
|
class raw_ostream;
|
||
|
|
||
|
/// \brief Symbolize and annotate disassembled instructions.
|
||
|
///
|
||
|
/// For now this mimics the old symbolization logic (from both ARM and x86), that
|
||
|
/// relied on user-provided (C API) callbacks to do the actual symbol lookup in
|
||
|
/// the object file. This was moved to MCExternalSymbolizer.
|
||
|
/// A better API would not rely on actually calling the two methods here from
|
||
|
/// inside each disassembler, but would use the instr info to determine what
|
||
|
/// operands are actually symbolizable, and in what way. I don't think this
|
||
|
/// information exists right now.
|
||
|
class MCSymbolizer {
|
||
|
MCSymbolizer(const MCSymbolizer &) LLVM_DELETED_FUNCTION;
|
||
|
void operator=(const MCSymbolizer &) LLVM_DELETED_FUNCTION;
|
||
|
|
||
|
protected:
|
||
|
MCContext &Ctx;
|
||
|
OwningPtr<MCRelocationInfo> RelInfo;
|
||
|
|
||
|
public:
|
||
|
/// \brief Construct an MCSymbolizer, taking ownership of \p RelInfo.
|
||
|
MCSymbolizer(MCContext &Ctx, OwningPtr<MCRelocationInfo> &RelInfo);
|
||
|
virtual ~MCSymbolizer();
|
||
|
|
||
|
/// \brief Try to add a symbolic operand instead of \p Value to the MCInst.
|
||
|
///
|
||
|
/// Instead of having a difficult to read immediate, a symbolic operand would
|
||
|
/// represent this immediate in a more understandable way, for instance as a
|
||
|
/// symbol or an offset from a symbol. Relocations can also be used to enrich
|
||
|
/// the symbolic expression.
|
||
|
/// @param Inst - The MCInst where to insert the symbolic operand.
|
||
|
/// @param cStream - Stream to print comments and annotations on.
|
||
|
/// @param Value - Operand value, pc-adjusted by the caller if necessary.
|
||
|
/// @param Address - Load address of the instruction.
|
||
|
/// @param IsBranch - Is the instruction a branch?
|
||
|
/// @param Offset - Byte offset of the operand inside the inst.
|
||
|
/// @param InstSize - Size of the instruction in bytes.
|
||
|
/// @return Whether a symbolic operand was added.
|
||
|
virtual bool tryAddingSymbolicOperand(MCInst &Inst, raw_ostream &cStream,
|
||
|
int64_t Value, uint64_t Address,
|
||
|
bool IsBranch, uint64_t Offset,
|
||
|
uint64_t InstSize) = 0;
|
||
|
|
||
|
/// \brief Try to add a comment on the PC-relative load.
|
||
|
/// For instance, in Mach-O, this is used to add annotations to instructions
|
||
|
/// that use C string literals, as found in __cstring.
|
||
|
virtual void tryAddingPcLoadReferenceComment(raw_ostream &cStream,
|
||
|
int64_t Value,
|
||
|
uint64_t Address) = 0;
|
||
|
};
|
||
|
|
||
|
}
|
||
|
|
||
|
#endif
|