73       long size = ob.getSize();
  74       if ( pc.greaterThanOrEqual(base) && pc.lessThan(base.addOffsetTo(size))) {
  75         return ob;
  76       }
  77     }
  78 
  79     return null;
  80   }
  81 
  82   public CFrame topFrameForThread(ThreadProxy thread) throws DebuggerException {
  83     String cpu = dbg.getCPU();
  84     if (cpu.equals("x86")) {
  85        X86ThreadContext context = (X86ThreadContext) thread.getContext();
  86        Address ebp = context.getRegisterAsAddress(X86ThreadContext.EBP);
  87        if (ebp == null) return null;
  88        Address pc  = context.getRegisterAsAddress(X86ThreadContext.EIP);
  89        if (pc == null) return null;
  90        return new LinuxX86CFrame(dbg, ebp, pc);
  91     } else if (cpu.equals("amd64")) {
  92        AMD64ThreadContext context = (AMD64ThreadContext) thread.getContext();
  93        Address rbp = context.getRegisterAsAddress(AMD64ThreadContext.RBP);
  94        if (rbp == null) return null;
  95        Address pc  = context.getRegisterAsAddress(AMD64ThreadContext.RIP);
  96        if (pc == null) return null;
  97        return new LinuxAMD64CFrame(dbg, rbp, pc);





























  98     } else if (cpu.equals("sparc")) {
  99        SPARCThreadContext context = (SPARCThreadContext) thread.getContext();
 100        Address sp = context.getRegisterAsAddress(SPARCThreadContext.R_SP);
 101        if (sp == null) return null;
 102        Address pc  = context.getRegisterAsAddress(SPARCThreadContext.R_O7);
 103        if (pc == null) return null;
 104        return new LinuxSPARCCFrame(dbg, sp, pc, LinuxDebuggerLocal.getAddressSize());
 105     }  else if (cpu.equals("ppc64")) {
 106         PPC64ThreadContext context = (PPC64ThreadContext) thread.getContext();
 107         Address sp = context.getRegisterAsAddress(PPC64ThreadContext.SP);
 108         if (sp == null) return null;
 109         Address pc  = context.getRegisterAsAddress(PPC64ThreadContext.PC);
 110         if (pc == null) return null;
 111         return new LinuxPPC64CFrame(dbg, sp, pc, LinuxDebuggerLocal.getAddressSize());
 112     } else if (cpu.equals("aarch64")) {
 113        AARCH64ThreadContext context = (AARCH64ThreadContext) thread.getContext();
 114        Address fp = context.getRegisterAsAddress(AARCH64ThreadContext.FP);
 115        if (fp == null) return null;
 116        Address pc  = context.getRegisterAsAddress(AARCH64ThreadContext.PC);
 117        if (pc == null) return null;

  73       long size = ob.getSize();
  74       if ( pc.greaterThanOrEqual(base) && pc.lessThan(base.addOffsetTo(size))) {
  75         return ob;
  76       }
  77     }
  78 
  79     return null;
  80   }
  81 
  82   public CFrame topFrameForThread(ThreadProxy thread) throws DebuggerException {
  83     String cpu = dbg.getCPU();
  84     if (cpu.equals("x86")) {
  85        X86ThreadContext context = (X86ThreadContext) thread.getContext();
  86        Address ebp = context.getRegisterAsAddress(X86ThreadContext.EBP);
  87        if (ebp == null) return null;
  88        Address pc  = context.getRegisterAsAddress(X86ThreadContext.EIP);
  89        if (pc == null) return null;
  90        return new LinuxX86CFrame(dbg, ebp, pc);
  91     } else if (cpu.equals("amd64")) {
  92        AMD64ThreadContext context = (AMD64ThreadContext) thread.getContext();


  93        Address pc  = context.getRegisterAsAddress(AMD64ThreadContext.RIP);
  94        if (pc == null) return null;
  95 
  96        long libptr = dbg.findLibPtrByAddress(pc);
  97        if (libptr == 0L) { // Java frame
  98          Address rbp  = context.getRegisterAsAddress(AMD64ThreadContext.RBP);
  99          if (rbp == null) {
 100            return null;
 101          }
 102          return new LinuxAMD64CFrame(dbg, rbp, pc, null);
 103        } else { // Native frame
 104          DwarfParser dwarf;
 105          try {
 106            dwarf = new DwarfParser(libptr);
 107          } catch (DebuggerException e) {
 108            Address rbp  = context.getRegisterAsAddress(AMD64ThreadContext.RBP);
 109            if (rbp == null) {
 110              return null;
 111            }
 112            return new LinuxAMD64CFrame(dbg, rbp, pc, null);
 113          }
 114          dwarf.processDwarf(pc);
 115          Address cfa = ((dwarf.getCFARegister() == AMD64ThreadContext.RBP) &&
 116                         !dwarf.isBPOffsetAvailable())
 117                            ? context.getRegisterAsAddress(AMD64ThreadContext.RBP)
 118                            : context.getRegisterAsAddress(dwarf.getCFARegister())
 119                                     .addOffsetTo(dwarf.getCFAOffset());
 120          if (cfa == null) {
 121            return null;
 122          }
 123          return new LinuxAMD64CFrame(dbg, cfa, pc, dwarf);
 124        }
 125     } else if (cpu.equals("sparc")) {
 126        SPARCThreadContext context = (SPARCThreadContext) thread.getContext();
 127        Address sp = context.getRegisterAsAddress(SPARCThreadContext.R_SP);
 128        if (sp == null) return null;
 129        Address pc  = context.getRegisterAsAddress(SPARCThreadContext.R_O7);
 130        if (pc == null) return null;
 131        return new LinuxSPARCCFrame(dbg, sp, pc, LinuxDebuggerLocal.getAddressSize());
 132     }  else if (cpu.equals("ppc64")) {
 133         PPC64ThreadContext context = (PPC64ThreadContext) thread.getContext();
 134         Address sp = context.getRegisterAsAddress(PPC64ThreadContext.SP);
 135         if (sp == null) return null;
 136         Address pc  = context.getRegisterAsAddress(PPC64ThreadContext.PC);
 137         if (pc == null) return null;
 138         return new LinuxPPC64CFrame(dbg, sp, pc, LinuxDebuggerLocal.getAddressSize());
 139     } else if (cpu.equals("aarch64")) {
 140        AARCH64ThreadContext context = (AARCH64ThreadContext) thread.getContext();
 141        Address fp = context.getRegisterAsAddress(AARCH64ThreadContext.FP);
 142        if (fp == null) return null;
 143        Address pc  = context.getRegisterAsAddress(AARCH64ThreadContext.PC);
 144        if (pc == null) return null;