Opcode.cpp revision 263363 
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
24using namespace lldb;
25using namespace lldb_private;
26
27
28int
29Opcode::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
71lldb::ByteOrder
72Opcode::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
88uint32_t
89Opcode::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
135