1 //===-- ObjDumper.cpp - Base dumper class -----------------------*- 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 /// \file
11 /// This file implements ObjDumper.
12 ///
13 //===----------------------------------------------------------------------===//
14 
15 #include "ObjDumper.h"
16 #include "Error.h"
17 #include "llvm/Object/ObjectFile.h"
18 #include "llvm/Support/ScopedPrinter.h"
19 #include "llvm/Support/raw_ostream.h"
20 
21 namespace llvm {
22 
23 ObjDumper::ObjDumper(ScopedPrinter &Writer) : W(Writer) {}
24 
25 ObjDumper::~ObjDumper() {
26 }
27 
28 void ObjDumper::SectionHexDump(StringRef SecName, const uint8_t *Section,
29                                size_t Size) {
30   const uint8_t *SecContent = Section;
31   const uint8_t *SecEnd = Section + Size;
32   W.startLine() << "Hex dump of section '" << SecName << "':\n";
33 
34   for (const uint8_t *SecPtr = SecContent; SecPtr < SecEnd; SecPtr += 16) {
35     const uint8_t *TmpSecPtr = SecPtr;
36     uint8_t i;
37     uint8_t k;
38 
39     W.startLine() << format_hex(SecPtr - SecContent, 10);
40     W.startLine() << ' ';
41     for (i = 0; TmpSecPtr < SecEnd && i < 4; ++i) {
42       for (k = 0; TmpSecPtr < SecEnd && k < 4; k++, TmpSecPtr++) {
43         uint8_t Val = *(reinterpret_cast<const uint8_t *>(TmpSecPtr));
44         W.startLine() << format_hex_no_prefix(Val, 2);
45       }
46       W.startLine() << ' ';
47     }
48 
49     // We need to print the correct amount of spaces to match the format.
50     // We are adding the (4 - i) last rows that are 8 characters each.
51     // Then, the (4 - i) spaces that are in between the rows.
52     // Least, if we cut in a middle of a row, we add the remaining characters,
53     // which is (8 - (k * 2))
54     if (i < 4)
55       W.startLine() << format("%*c", (4 - i) * 8 + (4 - i) + (8 - (k * 2)),
56                               ' ');
57 
58     TmpSecPtr = SecPtr;
59     for (i = 0; TmpSecPtr + i < SecEnd && i < 16; ++i) {
60       if (isprint(TmpSecPtr[i]))
61         W.startLine() << TmpSecPtr[i];
62       else
63         W.startLine() << '.';
64     }
65 
66     W.startLine() << '\n';
67   }
68 }
69 
70 } // namespace llvm
71