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https://github.com/c64scene-ar/llvm-6502.git
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fe030f3dcd
Add a helper method to get address ranges specified in a DIE (either by DW_AT_low_pc/DW_AT_high_pc, or by DW_AT_ranges). Use it to untangle and simplify the code. No functionality change. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@206624 91177308-0d34-0410-b5e6-96231b3b80d8
70 lines
2.1 KiB
C++
70 lines
2.1 KiB
C++
//===-- DWARFDebugRangesList.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 "DWARFDebugRangeList.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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void DWARFDebugRangeList::clear() {
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Offset = -1U;
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AddressSize = 0;
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Entries.clear();
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}
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bool DWARFDebugRangeList::extract(DataExtractor data, uint32_t *offset_ptr) {
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clear();
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if (!data.isValidOffset(*offset_ptr))
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return false;
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AddressSize = data.getAddressSize();
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if (AddressSize != 4 && AddressSize != 8)
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return false;
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Offset = *offset_ptr;
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while (true) {
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RangeListEntry entry;
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uint32_t prev_offset = *offset_ptr;
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entry.StartAddress = data.getAddress(offset_ptr);
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entry.EndAddress = data.getAddress(offset_ptr);
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// Check that both values were extracted correctly.
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if (*offset_ptr != prev_offset + 2 * AddressSize) {
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clear();
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return false;
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}
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if (entry.isEndOfListEntry())
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break;
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Entries.push_back(entry);
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}
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return true;
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}
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void DWARFDebugRangeList::dump(raw_ostream &OS) const {
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for (const RangeListEntry &RLE : Entries) {
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const char *format_str = (AddressSize == 4
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? "%08x %08" PRIx64 " %08" PRIx64 "\n"
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: "%08x %016" PRIx64 " %016" PRIx64 "\n");
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OS << format(format_str, Offset, RLE.StartAddress, RLE.EndAddress);
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}
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OS << format("%08x <End of list>\n", Offset);
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}
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DWARFAddressRangesVector
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DWARFDebugRangeList::getAbsoluteRanges(uint64_t BaseAddress) const {
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DWARFAddressRangesVector Res;
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for (const RangeListEntry &RLE : Entries) {
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if (RLE.isBaseAddressSelectionEntry(AddressSize)) {
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BaseAddress = RLE.EndAddress;
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} else {
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Res.push_back(std::make_pair(BaseAddress + RLE.StartAddress,
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BaseAddress + RLE.EndAddress));
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}
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}
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return Res;
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}
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