contrib/llvm/tools/lldb/source/Core/Opcode.cpp

   1 //===-- Opcode.cpp ----------------------------------------------*- C++ -*-===//
   2 //
   3 //                     The LLVM Compiler Infrastructure
   4 //
   5 // This file is distributed under the University of Illinois Open Source
   6 // License. See LICENSE.TXT for details.
   7 //
   8 //===----------------------------------------------------------------------===//
   9
  10 #include "lldb/Core/Opcode.h"
  11
  12 // C Includes
  13 // C++ Includes
  14 // Other libraries and framework includes
  15 #include "llvm/ADT/Triple.h"
  16 // Project includes
  17 #include "lldb/Core/ArchSpec.h"
  18 #include "lldb/Core/DataBufferHeap.h"
  19 #include "lldb/Core/DataExtractor.h"
  20 #include "lldb/Core/Stream.h"
  21 #include "lldb/Host/Endian.h"
  22
  23
  24 using namespace lldb;
  25 using namespace lldb_private;
  26
  27
  28 int
  29 Opcode::Dump (Stream *s, uint32_t min_byte_width)
  30 {
  31     int bytes_written = 0;
  32     switch (m_type)
  33     {
  34     case Opcode::eTypeInvalid:
  35         bytes_written = s->PutCString ("<invalid>");
  36         break;
  37     case Opcode::eType8:
  38         bytes_written = s->Printf ("0x%2.2x", m_data.inst8);
  39         break;
  40     case Opcode::eType16:
  41         bytes_written = s->Printf ("0x%4.4x", m_data.inst16);
  42         break;
  43     case Opcode::eType16_2:
  44     case Opcode::eType32:
  45         bytes_written = s->Printf ("0x%8.8x", m_data.inst32);
  46         break;
  47
  48     case Opcode::eType64:
  49         bytes_written = s->Printf ("0x%16.16" PRIx64, m_data.inst64);
  50         break;
  51
  52     case Opcode::eTypeBytes:
  53         {
  54             for (uint32_t i=0; i<m_data.inst.length; ++i)
  55             {
  56                 if (i > 0)
  57                     bytes_written += s->PutChar (' ');
  58                 bytes_written += s->Printf ("%2.2x", m_data.inst.bytes[i]);
  59             }
  60         }
  61         break;
  62     }
  63
  64     // Add spaces to make sure bytes dispay comes out even in case opcodes
  65     // aren't all the same size
  66     if (bytes_written < min_byte_width)
  67         bytes_written = s->Printf ("%*s", min_byte_width - bytes_written, "");
  68     return bytes_written;
  69 }
  70
  71 lldb::ByteOrder
  72 Opcode::GetDataByteOrder () const
  73 {
  74     switch (m_type)
  75     {
  76         case Opcode::eTypeInvalid: break;
  77         case Opcode::eType8:
  78         case Opcode::eType16:
  79         case Opcode::eType16_2:
  80         case Opcode::eType32:
  81         case Opcode::eType64:    return lldb::endian::InlHostByteOrder();
  82         case Opcode::eTypeBytes:
  83             break;
  84     }
  85     return eByteOrderInvalid;
  86 }
  87
  88 uint32_t
  89 Opcode::GetData (DataExtractor &data) const
  90 {
  91     uint32_t byte_size = GetByteSize ();
  92
  93     DataBufferSP buffer_sp;
  94     if (byte_size > 0)
  95     {
  96         switch (m_type)
  97         {
  98             case Opcode::eTypeInvalid:
  99                 break;
 100
 101             case Opcode::eType8:    buffer_sp.reset (new DataBufferHeap (&m_data.inst8,  byte_size)); break;
 102             case Opcode::eType16:   buffer_sp.reset (new DataBufferHeap (&m_data.inst16, byte_size)); break;
 103             case Opcode::eType16_2:
 104                 {
 105                     // 32 bit thumb instruction, we need to sizzle this a bit
 106                     uint8_t buf[4];
 107                     buf[0] = m_data.inst.bytes[2];
 108                     buf[1] = m_data.inst.bytes[3];
 109                     buf[2] = m_data.inst.bytes[0];
 110                     buf[3] = m_data.inst.bytes[1];
 111                     buffer_sp.reset (new DataBufferHeap (buf, byte_size));
 112                 }
 113                 break;
 114             case Opcode::eType32:
 115                 buffer_sp.reset (new DataBufferHeap (&m_data.inst32, byte_size));
 116                 break;
 117             case Opcode::eType64:   buffer_sp.reset (new DataBufferHeap (&m_data.inst64, byte_size)); break;
 118             case Opcode::eTypeBytes:buffer_sp.reset (new DataBufferHeap (GetOpcodeBytes(), byte_size)); break;
 119                 break;
 120         }
 121     }
 122
 123     if (buffer_sp)
 124     {
 125         data.SetByteOrder(GetDataByteOrder());
 126         data.SetData (buffer_sp);
 127         return byte_size;
 128     }
 129     data.Clear();
 130     return 0;
 131 }
 132
 133
 134