public Entry(CIE cie)
{
this.cie = cie;
this.current_address = TargetAddress.Null;
this.address = TargetAddress.Null;
this.columns = cie.Columns;
}
public Entry(CIE cie, TargetAddress initial_location,
TargetAddress address)
{
this.cie = cie;
this.current_address = initial_location;
this.address = address;
this.columns = new Column [cie.Columns.Length];
cie.Columns.CopyTo(columns, 0);
}
public CIE(DwarfFrameReader frame, long offset, CIE next)
{
this.frame = frame;
this.offset = offset;
this.next = next;
DwarfBinaryReader reader = new DwarfBinaryReader(
frame.bfd, frame.blob, false);
read_cie(reader);
}
protected CIE find_cie(long offset)
{
for (CIE cie = cie_list; cie != null; cie = cie.Next)
{
if (cie.Offset == offset)
{
return(cie);
}
}
CIE new_cie = new CIE(this, offset, cie_list);
cie_list = new_cie;
return(cie_list);
}
public Entry(CIE cie, TargetAddress initial_location,
TargetAddress address)
{
this.cie = cie;
this.current_address = initial_location;
this.address = address;
this.columns = new Column [cie.Columns.Length];
cie.Columns.CopyTo (columns, 0);
}
public Entry(CIE cie)
{
this.cie = cie;
this.current_address = TargetAddress.Null;
this.address = TargetAddress.Null;
this.columns = cie.Columns;
}
public CIE(DwarfFrameReader frame, long offset, CIE next)
{
this.frame = frame;
this.offset = offset;
this.next = next;
DwarfBinaryReader reader = new DwarfBinaryReader (
frame.bfd, frame.blob, false);
read_cie (reader);
}
protected CIE find_cie(long offset)
{
for (CIE cie = cie_list; cie != null; cie = cie.Next) {
if (cie.Offset == offset)
return cie;
}
CIE new_cie = new CIE (this, offset, cie_list);
cie_list = new_cie;
return cie_list;
}
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);
}
