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to reflect the new license. We understand that people may be surprised that we're moving the header entirely to discuss the new license. We checked this carefully with the Foundation's lawyer and we believe this is the correct approach. Essentially, all code in the project is now made available by the LLVM project under our new license, so you will see that the license headers include that license only. Some of our contributors have contributed code under our old license, and accordingly, we have retained a copy of our old license notice in the top-level files in each project and repository. llvm-svn: 351636
109 lines
4.8 KiB
C++
109 lines
4.8 KiB
C++
//===- DWARFListTable.cpp ---------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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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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