forked from OSchip/llvm-project
110 lines
4.7 KiB
C++
110 lines
4.7 KiB
C++
//===- DWARFListTable.cpp ---------------------------------------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/DebugInfo/DWARF/DWARFListTable.h"
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#include "llvm/BinaryFormat/Dwarf.h"
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#include "llvm/Support/Errc.h"
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#include "llvm/Support/Error.h"
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#include "llvm/Support/Format.h"
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#include "llvm/Support/raw_ostream.h"
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using namespace llvm;
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Error DWARFListTableHeader::extract(DWARFDataExtractor Data,
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uint32_t *OffsetPtr) {
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HeaderOffset = *OffsetPtr;
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// Read and verify the length field.
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if (!Data.isValidOffsetForDataOfSize(*OffsetPtr, sizeof(uint32_t)))
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return createStringError(errc::invalid_argument,
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"section is not large enough to contain a "
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"%s table length at offset 0x%" PRIx32,
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SectionName.data(), *OffsetPtr);
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// TODO: Add support for DWARF64.
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HeaderData.Length = Data.getU32(OffsetPtr);
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if (HeaderData.Length == 0xffffffffu)
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return createStringError(errc::not_supported,
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"DWARF64 is not supported in %s at offset 0x%" PRIx32,
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SectionName.data(), HeaderOffset);
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Format = dwarf::DwarfFormat::DWARF32;
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if (HeaderData.Length + sizeof(uint32_t) < sizeof(Header))
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return createStringError(errc::invalid_argument,
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"%s table at offset 0x%" PRIx32
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" has too small length (0x%" PRIx32
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") to contain a complete header",
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SectionName.data(), HeaderOffset, length());
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uint32_t End = HeaderOffset + length();
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if (!Data.isValidOffsetForDataOfSize(HeaderOffset, End - HeaderOffset))
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return createStringError(errc::invalid_argument,
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"section is not large enough to contain a %s table "
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"of length 0x%" PRIx32 " at offset 0x%" PRIx32,
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SectionName.data(), length(), HeaderOffset);
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HeaderData.Version = Data.getU16(OffsetPtr);
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HeaderData.AddrSize = Data.getU8(OffsetPtr);
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HeaderData.SegSize = Data.getU8(OffsetPtr);
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HeaderData.OffsetEntryCount = Data.getU32(OffsetPtr);
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// Perform basic validation of the remaining header fields.
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if (HeaderData.Version != 5)
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return createStringError(errc::invalid_argument,
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"unrecognised %s table version %" PRIu16
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" in table at offset 0x%" PRIx32,
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SectionName.data(), HeaderData.Version, HeaderOffset);
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if (HeaderData.AddrSize != 4 && HeaderData.AddrSize != 8)
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return createStringError(errc::not_supported,
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"%s table at offset 0x%" PRIx32
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" has unsupported address size %" PRIu8,
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SectionName.data(), HeaderOffset, HeaderData.AddrSize);
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if (HeaderData.SegSize != 0)
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return createStringError(errc::not_supported,
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"%s table at offset 0x%" PRIx32
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" has unsupported segment selector size %" PRIu8,
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SectionName.data(), HeaderOffset, HeaderData.SegSize);
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if (End < HeaderOffset + sizeof(HeaderData) +
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HeaderData.OffsetEntryCount * sizeof(uint32_t))
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return createStringError(errc::invalid_argument,
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"%s table at offset 0x%" PRIx32 " has more offset entries (%" PRIu32
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") than there is space for",
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SectionName.data(), HeaderOffset, HeaderData.OffsetEntryCount);
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Data.setAddressSize(HeaderData.AddrSize);
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for (uint32_t I = 0; I < HeaderData.OffsetEntryCount; ++I)
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Offsets.push_back(Data.getU32(OffsetPtr));
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return Error::success();
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}
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void DWARFListTableHeader::dump(raw_ostream &OS, DIDumpOptions DumpOpts) const {
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if (DumpOpts.Verbose)
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OS << format("0x%8.8" PRIx32 ": ", HeaderOffset);
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OS << format(
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"%s list header: length = 0x%8.8" PRIx32 ", version = 0x%4.4" PRIx16 ", "
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"addr_size = 0x%2.2" PRIx8 ", seg_size = 0x%2.2" PRIx8
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", offset_entry_count = "
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"0x%8.8" PRIx32 "\n",
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ListTypeString.data(), HeaderData.Length, HeaderData.Version,
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HeaderData.AddrSize, HeaderData.SegSize, HeaderData.OffsetEntryCount);
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if (HeaderData.OffsetEntryCount > 0) {
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OS << "offsets: [";
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for (const auto &Off : Offsets) {
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OS << format("\n0x%8.8" PRIx32, Off);
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if (DumpOpts.Verbose)
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OS << format(" => 0x%8.8" PRIx32,
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Off + HeaderOffset + sizeof(HeaderData));
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}
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OS << "\n]\n";
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}
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}
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uint32_t DWARFListTableHeader::length() const {
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if (HeaderData.Length == 0)
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return 0;
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// TODO: DWARF64 support.
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return HeaderData.Length + sizeof(uint32_t);
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}
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