1 //===- DWARFListTable.cpp ---------------------------------------------===//
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 //===----------------------------------------------------------------------===//
10 #include "llvm/DebugInfo/DWARF/DWARFListTable.h"
11 #include "llvm/BinaryFormat/Dwarf.h"
12 #include "llvm/Support/Errc.h"
13 #include "llvm/Support/Error.h"
14 #include "llvm/Support/Format.h"
15 #include "llvm/Support/raw_ostream.h"
19 Error DWARFListTableHeader::extract(DWARFDataExtractor Data,
20 uint32_t *OffsetPtr) {
21 HeaderOffset = *OffsetPtr;
22 // Read and verify the length field.
23 if (!Data.isValidOffsetForDataOfSize(*OffsetPtr, sizeof(uint32_t)))
24 return createStringError(errc::invalid_argument,
25 "section is not large enough to contain a "
26 "%s table length at offset 0x%" PRIx32,
27 SectionName.data(), *OffsetPtr);
28 // TODO: Add support for DWARF64.
29 HeaderData.Length = Data.getU32(OffsetPtr);
30 if (HeaderData.Length == 0xffffffffu)
31 return createStringError(errc::not_supported,
32 "DWARF64 is not supported in %s at offset 0x%" PRIx32,
33 SectionName.data(), HeaderOffset);
34 Format = dwarf::DwarfFormat::DWARF32;
35 if (HeaderData.Length + sizeof(uint32_t) < sizeof(Header))
36 return createStringError(errc::invalid_argument,
37 "%s table at offset 0x%" PRIx32
38 " has too small length (0x%" PRIx32
39 ") to contain a complete header",
40 SectionName.data(), HeaderOffset, length());
41 uint32_t End = HeaderOffset + length();
42 if (!Data.isValidOffsetForDataOfSize(HeaderOffset, End - HeaderOffset))
43 return createStringError(errc::invalid_argument,
44 "section is not large enough to contain a %s table "
45 "of length 0x%" PRIx32 " at offset 0x%" PRIx32,
46 SectionName.data(), length(), HeaderOffset);
48 HeaderData.Version = Data.getU16(OffsetPtr);
49 HeaderData.AddrSize = Data.getU8(OffsetPtr);
50 HeaderData.SegSize = Data.getU8(OffsetPtr);
51 HeaderData.OffsetEntryCount = Data.getU32(OffsetPtr);
53 // Perform basic validation of the remaining header fields.
54 if (HeaderData.Version != 5)
55 return createStringError(errc::invalid_argument,
56 "unrecognised %s table version %" PRIu16
57 " in table at offset 0x%" PRIx32,
58 SectionName.data(), HeaderData.Version, HeaderOffset);
59 if (HeaderData.AddrSize != 4 && HeaderData.AddrSize != 8)
60 return createStringError(errc::not_supported,
61 "%s table at offset 0x%" PRIx32
62 " has unsupported address size %" PRIu8,
63 SectionName.data(), HeaderOffset, HeaderData.AddrSize);
64 if (HeaderData.SegSize != 0)
65 return createStringError(errc::not_supported,
66 "%s table at offset 0x%" PRIx32
67 " has unsupported segment selector size %" PRIu8,
68 SectionName.data(), HeaderOffset, HeaderData.SegSize);
69 if (End < HeaderOffset + sizeof(HeaderData) +
70 HeaderData.OffsetEntryCount * sizeof(uint32_t))
71 return createStringError(errc::invalid_argument,
72 "%s table at offset 0x%" PRIx32 " has more offset entries (%" PRIu32
73 ") than there is space for",
74 SectionName.data(), HeaderOffset, HeaderData.OffsetEntryCount);
75 Data.setAddressSize(HeaderData.AddrSize);
76 for (uint32_t I = 0; I < HeaderData.OffsetEntryCount; ++I)
77 Offsets.push_back(Data.getU32(OffsetPtr));
78 return Error::success();
81 void DWARFListTableHeader::dump(raw_ostream &OS, DIDumpOptions DumpOpts) const {
83 OS << format("0x%8.8" PRIx32 ": ", HeaderOffset);
85 "%s list header: length = 0x%8.8" PRIx32 ", version = 0x%4.4" PRIx16 ", "
86 "addr_size = 0x%2.2" PRIx8 ", seg_size = 0x%2.2" PRIx8
87 ", offset_entry_count = "
89 ListTypeString.data(), HeaderData.Length, HeaderData.Version,
90 HeaderData.AddrSize, HeaderData.SegSize, HeaderData.OffsetEntryCount);
92 if (HeaderData.OffsetEntryCount > 0) {
94 for (const auto &Off : Offsets) {
95 OS << format("\n0x%8.8" PRIx32, Off);
97 OS << format(" => 0x%8.8" PRIx32,
98 Off + HeaderOffset + sizeof(HeaderData));
104 uint32_t DWARFListTableHeader::length() const {
105 if (HeaderData.Length == 0)
107 // TODO: DWARF64 support.
108 return HeaderData.Length + sizeof(uint32_t);