1 //===- yaml2dwarf - Convert YAML to DWARF binary data ---------------------===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
11 /// \brief The DWARF component of yaml2obj.
13 //===----------------------------------------------------------------------===//
15 #include "llvm/ObjectYAML/DWARFYAML.h"
16 #include "llvm/Support/Error.h"
17 #include "llvm/Support/LEB128.h"
18 #include "llvm/Support/raw_ostream.h"
19 #include "llvm/Support/SwapByteOrder.h"
24 void writeInteger(T Integer, raw_ostream &OS, bool IsLittleEndian) {
25 if (IsLittleEndian != sys::IsLittleEndianHost)
26 sys::swapByteOrder(Integer);
27 OS.write(reinterpret_cast<char *>(&Integer), sizeof(T));
30 void writeVariableSizedInteger(uint64_t Integer, size_t Size, raw_ostream &OS,
31 bool IsLittleEndian) {
33 writeInteger((uint64_t)Integer, OS, IsLittleEndian);
35 writeInteger((uint32_t)Integer, OS, IsLittleEndian);
37 writeInteger((uint16_t)Integer, OS, IsLittleEndian);
39 writeInteger((uint8_t)Integer, OS, IsLittleEndian);
41 assert(false && "Invalid integer write size.");
44 void ZeroFillBytes(raw_ostream &OS, size_t Size) {
45 std::vector<uint8_t> FillData;
46 FillData.insert(FillData.begin(), Size, 0);
47 OS.write(reinterpret_cast<char *>(FillData.data()), Size);
50 void yaml2debug_str(raw_ostream &OS, const DWARFYAML::Data &DI) {
51 for (auto Str : DI.DebugStrings) {
52 OS.write(Str.data(), Str.size());
57 void yaml2debug_abbrev(raw_ostream &OS, const DWARFYAML::Data &DI) {
58 for (auto AbbrevDecl : DI.AbbrevDecls) {
59 encodeULEB128(AbbrevDecl.Code, OS);
60 encodeULEB128(AbbrevDecl.Tag, OS);
61 OS.write(AbbrevDecl.Children);
62 for (auto Attr : AbbrevDecl.Attributes) {
63 encodeULEB128(Attr.Attribute, OS);
64 encodeULEB128(Attr.Form, OS);
71 void yaml2debug_aranges(raw_ostream &OS, const DWARFYAML::Data &DI) {
72 for (auto Range : DI.ARanges) {
73 auto HeaderStart = OS.tell();
74 writeInteger((uint32_t)Range.Length, OS, DI.IsLittleEndian);
75 writeInteger((uint16_t)Range.Version, OS, DI.IsLittleEndian);
76 writeInteger((uint32_t)Range.CuOffset, OS, DI.IsLittleEndian);
77 writeInteger((uint8_t)Range.AddrSize, OS, DI.IsLittleEndian);
78 writeInteger((uint8_t)Range.SegSize, OS, DI.IsLittleEndian);
80 auto HeaderSize = OS.tell() - HeaderStart;
81 auto FirstDescriptor = alignTo(HeaderSize, Range.AddrSize * 2);
82 ZeroFillBytes(OS, FirstDescriptor - HeaderSize);
84 for (auto Descriptor : Range.Descriptors) {
85 writeVariableSizedInteger(Descriptor.Address, Range.AddrSize, OS,
87 writeVariableSizedInteger(Descriptor.Length, Range.AddrSize, OS,
90 ZeroFillBytes(OS, Range.AddrSize * 2);
94 void yaml2pubsection(raw_ostream &OS, const DWARFYAML::PubSection &Sect,
95 bool IsLittleEndian) {
96 writeInteger((uint32_t)Sect.Length, OS, IsLittleEndian);
97 writeInteger((uint16_t)Sect.Version, OS, IsLittleEndian);
98 writeInteger((uint32_t)Sect.UnitOffset, OS, IsLittleEndian);
99 writeInteger((uint32_t)Sect.UnitSize, OS, IsLittleEndian);
100 for (auto Entry : Sect.Entries) {
101 writeInteger((uint32_t)Entry.DieOffset, OS, IsLittleEndian);
103 writeInteger((uint32_t)Entry.Descriptor, OS, IsLittleEndian);
104 OS.write(Entry.Name.data(), Entry.Name.size());