public StackFrame UnwindStack(StackFrame frame, TargetMemoryAccess target,
Architecture arch)
{
if (frame.TargetAddress.IsNull)
return null;
TargetAddress address = frame.TargetAddress;
DwarfBinaryReader reader = new DwarfBinaryReader (bfd, blob, false);
while (reader.Position < reader.Size) {
long length = reader.ReadInitialLength ();
if (length == 0)
break;
long end_pos = reader.Position + length;
long cie_pointer = reader.ReadOffset ();
bool is_cie;
if (is_ehframe)
is_cie = cie_pointer == 0;
else
is_cie = cie_pointer == -1;
if (is_cie) {
reader.Position = end_pos;
continue;
}
if (is_ehframe)
cie_pointer = reader.Position - cie_pointer -
target.TargetMemoryInfo.TargetAddressSize;
CIE cie = find_cie (cie_pointer);
long initial, range;
if (is_ehframe) {
initial = ReadEncodedValue (reader, cie.Encoding);
range = ReadEncodedValue (reader, cie.Encoding & 0x0f);
} else {
initial = reader.ReadAddress ();
range = reader.ReadAddress ();
}
TargetAddress start = new TargetAddress (target.AddressDomain, initial);
if ((address < start) || (address > start + range)) {
reader.Position = end_pos;
continue;
}
Entry fde = new Entry (cie, start, address);
fde.Read (reader, end_pos);
return fde.Unwind (frame, target, arch);
}
return null;
}
Hashtable read_pubtypes()
{
if (debug_pubtypes_reader == null)
return null;
DwarfBinaryReader reader = new DwarfBinaryReader (
bfd, (TargetBlob) debug_pubtypes_reader.Data, Is64Bit);
Hashtable names = Hashtable.Synchronized (new Hashtable ());
while (!reader.IsEof) {
long length = reader.ReadInitialLength ();
long stop = reader.Position + length;
int version = reader.ReadInt16 ();
long debug_offset = reader.ReadOffset ();
reader.ReadOffset ();
if (version != 2)
throw new DwarfException (
bfd, "Wrong version in .debug_pubtypes: {0}",
version);
while (reader.Position < stop) {
long offset = reader.ReadInt32 ();
if (offset == 0)
break;
string name = reader.ReadString ();
if (!names.Contains (name))
names.Add (name, new NameEntry (debug_offset, offset));
}
}
return names;
}
public LineNumberEngine(DieCompileUnit comp_unit, long offset,
string compilation_dir)
{
this.comp_unit = comp_unit;
this.offset = offset;
this.reader = comp_unit.dwarf.DebugLineReader;
this.compilation_dir = compilation_dir;
debug ("NEW LNE: {0}", offset);
reader.Position = offset;
length = reader.ReadInitialLength ();
end_offset = reader.Position + length;
version = reader.ReadInt16 ();
header_length = reader.ReadOffset ();
data_offset = reader.Position + header_length;
minimum_insn_length = reader.ReadByte ();
default_is_stmt = reader.ReadByte () != 0;
line_base = (sbyte) reader.ReadByte ();
line_range = reader.ReadByte ();
opcode_base = reader.ReadByte ();
standard_opcode_lengths = new int [opcode_base - 1];
for (int i = 0; i < opcode_base - 1; i++)
standard_opcode_lengths [i] = reader.ReadByte ();
include_dirs = new ArrayList ();
while (reader.PeekByte () != 0)
include_dirs.Add (reader.ReadString ());
reader.Position++;
source_files = new ArrayList ();
while (reader.PeekByte () != 0)
source_files.Add (new FileEntry (this, reader));
reader.Position++;
const_add_pc_range = ((0xff - opcode_base) / line_range) *
minimum_insn_length;
debug ("NEW LNE #1: {0} {1} - {2} {3} {4}",
reader.Position, offset, length,
data_offset, end_offset);
lines = new ArrayList ();
stm = new StatementMachine (this, data_offset, end_offset);
Read ();
lines.Sort ();
addresses = new LineNumber [lines.Count];
lines.CopyTo (addresses, 0);
}
ArrayList read_aranges()
{
ArrayList ranges = new ArrayList ();
if (debug_aranges_reader == null)
return ranges;
DwarfBinaryReader reader = new DwarfBinaryReader (
bfd, (TargetBlob) debug_aranges_reader.Data, Is64Bit);
while (!reader.IsEof) {
long length = reader.ReadInitialLength ();
long stop = reader.Position + length;
int version = reader.ReadInt16 ();
long offset = reader.ReadOffset ();
int address_size = reader.ReadByte ();
int segment_size = reader.ReadByte ();
if ((address_size != 4) && (address_size != 8))
throw new DwarfException (
bfd, "Unknown address size: {0}", address_size);
if (segment_size != 0)
throw new DwarfException (
bfd, "Segmented address mode not supported");
if (version != 2)
throw new DwarfException (
bfd, "Wrong version in .debug_aranges: {0}",
version);
if (AddressSize == 8)
reader.Position = ((reader.Position+15) >> 4) * 16;
else
reader.Position = ((reader.Position+7) >> 3) * 8;
while (reader.Position < stop) {
long address = reader.ReadAddress ();
long size = reader.ReadAddress ();
if ((address == 0) && (size == 0))
break;
TargetAddress taddress = GetAddress (address);
ranges.Add (new RangeEntry (this, offset, taddress, size));
}
}
return ranges;
}
public CompilationUnit(DwarfReader dwarf, DwarfBinaryReader reader)
{
this.dwarf = dwarf;
real_start_offset = reader.Position;
unit_length = reader.ReadInitialLength ();
start_offset = reader.Position;
version = reader.ReadInt16 ();
abbrev_offset = reader.ReadOffset ();
address_size = reader.ReadByte ();
if (version < 2)
throw new DwarfException (
dwarf.bfd, "Wrong DWARF version: {0}",
version);
abbrevs = new Hashtable ();
types = new Hashtable ();
subprogs = new Hashtable ();
namespaces = new Dictionary<long,DieNamespace> ();
DwarfBinaryReader abbrev_reader = dwarf.DebugAbbrevReader;
abbrev_reader.Position = abbrev_offset;
while (abbrev_reader.PeekByte () != 0) {
AbbrevEntry entry = new AbbrevEntry (dwarf, abbrev_reader);
abbrevs.Add (entry.ID, entry);
}
comp_unit_die = Die.CreateDieCompileUnit (reader, this);
reader.Position = start_offset + unit_length;
}
