aboutsummaryrefslogtreecommitdiffstats
path: root/contrib/libs/llvm14/include/llvm/Support/ELFAttributeParser.h
blob: 7a1727ccba6a61131e5a72a04e107890debcfa66 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
#pragma once

#ifdef __GNUC__
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wunused-parameter"
#endif

//===- ELF AttributeParser.h - ELF Attribute Parser -------------*- C++ -*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//

#ifndef LLVM_SUPPORT_ELFATTRIBUTEPARSER_H
#define LLVM_SUPPORT_ELFATTRIBUTEPARSER_H

#include "ELFAttributes.h"
#include "llvm/ADT/ArrayRef.h"
#include "llvm/Support/DataExtractor.h"
#include "llvm/Support/Endian.h"
#include "llvm/Support/Error.h"

#include <unordered_map>

namespace llvm {
class StringRef;
class ScopedPrinter;

class ELFAttributeParser {
  StringRef vendor;
  std::unordered_map<unsigned, unsigned> attributes;
  std::unordered_map<unsigned, StringRef> attributesStr;

  virtual Error handler(uint64_t tag, bool &handled) = 0;

protected:
  ScopedPrinter *sw;
  TagNameMap tagToStringMap;
  DataExtractor de{ArrayRef<uint8_t>{}, true, 0};
  DataExtractor::Cursor cursor{0};

  void printAttribute(unsigned tag, unsigned value, StringRef valueDesc);

  Error parseStringAttribute(const char *name, unsigned tag,
                             ArrayRef<const char *> strings);
  Error parseAttributeList(uint32_t length);
  void parseIndexList(SmallVectorImpl<uint8_t> &indexList);
  Error parseSubsection(uint32_t length);

public:
  virtual ~ELFAttributeParser() { static_cast<void>(!cursor.takeError()); }
  Error integerAttribute(unsigned tag);
  Error stringAttribute(unsigned tag);

  ELFAttributeParser(ScopedPrinter *sw, TagNameMap tagNameMap, StringRef vendor)
      : vendor(vendor), sw(sw), tagToStringMap(tagNameMap) {}

  ELFAttributeParser(TagNameMap tagNameMap, StringRef vendor)
      : vendor(vendor), sw(nullptr), tagToStringMap(tagNameMap) {}

  Error parse(ArrayRef<uint8_t> section, support::endianness endian);

  Optional<unsigned> getAttributeValue(unsigned tag) const {
    auto I = attributes.find(tag);
    if (I == attributes.end())
      return None;
    return I->second;
  }
  Optional<StringRef> getAttributeString(unsigned tag) const {
    auto I = attributesStr.find(tag);
    if (I == attributesStr.end())
      return None;
    return I->second;
  }
};

} // namespace llvm
#endif

#ifdef __GNUC__
#pragma GCC diagnostic pop
#endif