MachOBinaryFile.h

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/*
 * Copyright (C) 2000, The University of Queensland
 * Copyright (C) 2001, Sun Microsystems, Inc
 *
 * See the file "LICENSE.TERMS" for information on usage and
 * redistribution of this file, and for a DISCLAIMER OF ALL
 * WARRANTIES.
 *
 */

/* File: MachOBinaryFile.h
 * Desc: This file contains the definition of the class MachOBinaryFile.
*/

#ifndef __MACHOBINARYFILE_H__
#define __MACHOBINARYFILE_H_

#include "BinaryFile.h"
#include <string>
#include <vector>

/* $Revision: 1.4 $
 * This file contains the definition of the MachOBinaryFile class, and some
 * other definitions specific to the Mac OS-X version of the BinaryFile object
*/
/* This is my bare bones implementation of a Mac OS-X binary loader.
 * 13 Jan 05 - Trent: Created
 */

// Given a little endian value x, load its value assuming big endian order
// Note: must be able to take address of x
// Note: Unlike the LH macro in BinaryFile.h, the paraeter is not a pointer
#define BMMH(x) ((unsigned)((Byte *)(&x))[3] + ((unsigned)((Byte *)(&x))[2] << 8) + \
    ((unsigned)((Byte *)(&x))[1] << 16) + ((unsigned)((Byte *)(&x))[0] << 24))
// With this one, x IS a pounsigneder
#define BMMH2(x) ((unsigned)((Byte *)(x))[3] + ((unsigned)((Byte *)(x))[2] << 8) + \
    ((unsigned)((Byte *)(x))[1] << 16) + ((unsigned)((Byte *)(x))[0] << 24))


#define BMMHW(x) (((unsigned)((Byte *)(&x))[1]) + ((unsigned)((Byte *)(&x))[0] << 8))

//#ifdef WIN32
#pragma pack(1)
//#endif

#ifndef _MACH_MACHINE_H_                // On OS X, this is already defined
typedef unsigned long cpu_type_t;       // I guessed
typedef unsigned long cpu_subtype_t;    // I guessed
typedef unsigned long vm_prot_t;        // I guessed
#endif

//#ifdef WIN32
#pragma pack(4)
//#endif

struct mach_header;

class MachOBinaryFile : public BinaryFile
{
public:
                MachOBinaryFile();              // Default constructor
  virtual       ~MachOBinaryFile();             // Destructor
  virtual bool  Open(const char* sName);        // Open the file for r/w; ???
  virtual void  Close();                        // Close file opened with Open()
  virtual void  UnLoad();                       // Unload the image
  virtual LOAD_FMT GetFormat() const;           // Get format (i.e.
                                                // LOADFMT_MACHO)
  virtual MACHINE GetMachine() const;           // Get machine (i.e.
                                                // MACHINE_PPC)
virtual const char  *getFilename() const { return m_pFileName; }
virtual bool        isLibrary() const;
virtual std::list<const char *> getDependencyList();
virtual ADDRESS     getImageBase();
virtual size_t      getImageSize();

virtual std::list<SectionInfo*>& GetEntryPoints(const char* pEntry = "main");
virtual ADDRESS     GetMainEntryPoint();
virtual ADDRESS     GetEntryPoint();
        DWord       getDelta();
virtual const char* SymbolByAddress(ADDRESS dwAddr); // Get sym from addr
virtual ADDRESS     GetAddressByName(const char* name,
        bool        bNoTypeOK = false);                 // Find addr given name  
virtual void        AddSymbol(ADDRESS uNative, const char *pName);

//
//      --      --      --      --      --      --      --      --      --
//
        // Internal information
        // Dump headers, etc
virtual bool    DisplayDetails(const char* fileName, FILE* f = stdout);

protected:

        int machORead2(short *ps) const; // Read 2 bytes from native addr
        int machORead4(int *pi) const;   // Read 4 bytes from native addr

public:

virtual int         readNative1(ADDRESS a);         // Read 1 bytes from native addr
virtual int         readNative2(ADDRESS a);         // Read 2 bytes from native addr
virtual int         readNative4(ADDRESS a);         // Read 4 bytes from native addr
virtual QWord       readNative8(ADDRESS a); // Read 8 bytes from native addr
virtual float       readNativeFloat4(ADDRESS a);    // Read 4 bytes as float
virtual double      readNativeFloat8(ADDRESS a); // Read 8 bytes as float

virtual bool        IsDynamicLinkedProc(ADDRESS uNative) { return dlprocs.find(uNative) != dlprocs.end(); }
virtual const char  *GetDynamicProcName(ADDRESS uNative);

virtual std::map<ADDRESS, std::string> &getSymbols() { return m_SymA; }
virtual std::map<std::string, ObjcModule> &getObjcModules() { return modules; }

protected:
virtual bool        RealLoad(const char* sName); // Load the file; pure virtual

private:

        bool        PostLoad(void* handle); // Called after archive member loaded
        void        findJumps(ADDRESS curr);// Find names for jumps to IATs

        struct mach_header *header;      // The Mach-O header
        char *      base;                   // Beginning of the loaded image
        const char  *m_pFileName;
        ADDRESS     entrypoint, loaded_addr;
        unsigned    loaded_size;
        std::map<ADDRESS, std::string> m_SymA, dlprocs;
        std::map<std::string, ObjcModule> modules;
};

//#ifdef WIN32
#pragma pack()
//#endif
#endif          // ifndef __WIN32BINARYFILE_H__

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