Beispiel #1
0
        private static void WriteEncodedValue(DwarfWriter writer, DwarfOperationKindEx kind, ulong value, byte size)
        {
            writer.WriteU8(size);
            switch (size)
            {
            case 0:
                writer.WriteUInt(value);
                break;

            case 1:
                writer.WriteU8((byte)value);
                break;

            case 2:
                writer.WriteU16((ushort)value);
                break;

            case 4:
                writer.WriteU32((uint)value);
                break;

            case 8:
                writer.WriteU64(value);
                break;

            default:
                // TODO: report via diagnostics in Verify
                throw new InvalidOperationException($"Invalid Encoded address size {size} for {kind}");
            }
        }
        protected override void Write(DwarfWriter writer)
        {
            var startOffset = writer.Offset;

            // unit_length
            writer.WriteUnitLength(Size - DwarfHelper.SizeOfUnitLength(Is64BitEncoding));

            // version
            writer.WriteU16(Version);

            // debug_info_offset
            var debugInfoOffset = DebugInfoOffset;

            if (writer.EnableRelocation)
            {
                writer.RecordRelocation(DwarfRelocationTarget.DebugInfo, writer.SizeOfUIntEncoding(), debugInfoOffset);
                debugInfoOffset = 0;
            }
            writer.WriteUIntFromEncoding(debugInfoOffset);

            // address_size
            writer.AddressSize = AddressSize;
            writer.WriteU8((byte)AddressSize);

            writer.WriteU8((byte)SegmentSelectorSize);

            var align = (ulong)SegmentSelectorSize + (ulong)AddressSize * 2;

            // SPECS 7.21: The first tuple following the header in each set begins at an offset that is a multiple of the size of a single tuple
            var nextOffset = AlignHelper.AlignToUpper(writer.Offset, align);

            for (ulong offset = writer.Offset; offset < nextOffset; offset++)
            {
                writer.WriteU8(0);
            }
            Debug.Assert(writer.Offset == nextOffset);

            foreach (var range in Ranges)
            {
                if (SegmentSelectorSize != 0)
                {
                    switch (SegmentSelectorSize)
                    {
                    case DwarfAddressSize.Bit8:
                        writer.WriteU8((byte)range.Segment);
                        break;

                    case DwarfAddressSize.Bit16:
                        writer.WriteU16((ushort)range.Segment);
                        break;

                    case DwarfAddressSize.Bit32:
                        writer.WriteU32((uint)range.Segment);
                        break;

                    case DwarfAddressSize.Bit64:
                        writer.WriteU64((ulong)range.Segment);
                        break;
                    }
                }

                writer.WriteAddress(DwarfRelocationTarget.Code, range.Address);
                writer.WriteUInt(range.Length);
            }

            if (SegmentSelectorSize != 0)
            {
                switch (SegmentSelectorSize)
                {
                case DwarfAddressSize.Bit8:
                    writer.WriteU8(0);
                    break;

                case DwarfAddressSize.Bit16:
                    writer.WriteU16(0);
                    break;

                case DwarfAddressSize.Bit32:
                    writer.WriteU32(0);
                    break;

                case DwarfAddressSize.Bit64:
                    writer.WriteU64(0);
                    break;
                }
            }

            switch (AddressSize)
            {
            case DwarfAddressSize.Bit8:
                writer.WriteU16(0);
                break;

            case DwarfAddressSize.Bit16:
                writer.WriteU32(0);
                break;

            case DwarfAddressSize.Bit32:
                writer.WriteU64(0);
                break;

            case DwarfAddressSize.Bit64:
                writer.WriteU64(0);
                writer.WriteU64(0);
                break;
            }

            Debug.Assert(writer.Offset - startOffset == Size);
        }
Beispiel #3
0
        protected override void Write(DwarfWriter writer)
        {
            var startOpOffset = Offset;

            Debug.Assert(startOpOffset == Offset);

            writer.WriteU8((byte)Kind);

            switch (Kind.Value)
            {
            case DwarfOperationKind.Addr:
                writer.WriteAddress(DwarfRelocationTarget.Code, Operand1.U64);
                break;

            case DwarfOperationKind.Const1u:
            case DwarfOperationKind.Const1s:
            case DwarfOperationKind.Pick:
            case DwarfOperationKind.DerefSize:
            case DwarfOperationKind.XderefSize:
                writer.WriteU8((byte)Operand1.U64);
                break;

            case DwarfOperationKind.Const2u:
            case DwarfOperationKind.Const2s:
                writer.WriteU16((ushort)Operand1.U64);
                break;

            case DwarfOperationKind.Const4u:
            case DwarfOperationKind.Const4s:
                writer.WriteU32((uint)Operand1.U64);
                break;

            case DwarfOperationKind.Const8u:
            case DwarfOperationKind.Const8s:
                writer.WriteU64(Operand1.U64);
                break;

            case DwarfOperationKind.Constu:
            case DwarfOperationKind.PlusUconst:
            case DwarfOperationKind.Regx:
            case DwarfOperationKind.Piece:
            case DwarfOperationKind.Addrx:
            case DwarfOperationKind.GNUAddrIndex:
            case DwarfOperationKind.Constx:
            case DwarfOperationKind.GNUConstIndex:
                writer.WriteULEB128(Operand1.U64);
                break;

            case DwarfOperationKind.Consts:
            case DwarfOperationKind.Fbreg:
                writer.WriteILEB128(Operand1.I64);
                break;

            case DwarfOperationKind.Deref:
            case DwarfOperationKind.Dup:
            case DwarfOperationKind.Drop:
            case DwarfOperationKind.Over:
            case DwarfOperationKind.Swap:
            case DwarfOperationKind.Rot:
            case DwarfOperationKind.Xderef:
            case DwarfOperationKind.Abs:
            case DwarfOperationKind.And:
            case DwarfOperationKind.Div:
            case DwarfOperationKind.Minus:
            case DwarfOperationKind.Mod:
            case DwarfOperationKind.Mul:
            case DwarfOperationKind.Neg:
            case DwarfOperationKind.Not:
            case DwarfOperationKind.Or:
            case DwarfOperationKind.Plus:
            case DwarfOperationKind.Shl:
            case DwarfOperationKind.Shr:
            case DwarfOperationKind.Shra:
            case DwarfOperationKind.Xor:
            case DwarfOperationKind.Eq:
            case DwarfOperationKind.Ge:
            case DwarfOperationKind.Gt:
            case DwarfOperationKind.Le:
            case DwarfOperationKind.Lt:
            case DwarfOperationKind.Ne:
            case DwarfOperationKind.Nop:
            case DwarfOperationKind.PushObjectAddress:
            case DwarfOperationKind.FormTlsAddress:
            case DwarfOperationKind.CallFrameCfa:
                break;

            case DwarfOperationKind.Bra:
            case DwarfOperationKind.Skip:
                writer.WriteU16((ushort)((long)Offset + 2 - (long)((DwarfOperation)Operand0).Offset));
                break;

            case DwarfOperationKind.Lit0:
            case DwarfOperationKind.Lit1:
            case DwarfOperationKind.Lit2:
            case DwarfOperationKind.Lit3:
            case DwarfOperationKind.Lit4:
            case DwarfOperationKind.Lit5:
            case DwarfOperationKind.Lit6:
            case DwarfOperationKind.Lit7:
            case DwarfOperationKind.Lit8:
            case DwarfOperationKind.Lit9:
            case DwarfOperationKind.Lit10:
            case DwarfOperationKind.Lit11:
            case DwarfOperationKind.Lit12:
            case DwarfOperationKind.Lit13:
            case DwarfOperationKind.Lit14:
            case DwarfOperationKind.Lit15:
            case DwarfOperationKind.Lit16:
            case DwarfOperationKind.Lit17:
            case DwarfOperationKind.Lit18:
            case DwarfOperationKind.Lit19:
            case DwarfOperationKind.Lit20:
            case DwarfOperationKind.Lit21:
            case DwarfOperationKind.Lit22:
            case DwarfOperationKind.Lit23:
            case DwarfOperationKind.Lit24:
            case DwarfOperationKind.Lit25:
            case DwarfOperationKind.Lit26:
            case DwarfOperationKind.Lit27:
            case DwarfOperationKind.Lit28:
            case DwarfOperationKind.Lit29:
            case DwarfOperationKind.Lit30:
            case DwarfOperationKind.Lit31:
            case DwarfOperationKind.Reg0:
            case DwarfOperationKind.Reg1:
            case DwarfOperationKind.Reg2:
            case DwarfOperationKind.Reg3:
            case DwarfOperationKind.Reg4:
            case DwarfOperationKind.Reg5:
            case DwarfOperationKind.Reg6:
            case DwarfOperationKind.Reg7:
            case DwarfOperationKind.Reg8:
            case DwarfOperationKind.Reg9:
            case DwarfOperationKind.Reg10:
            case DwarfOperationKind.Reg11:
            case DwarfOperationKind.Reg12:
            case DwarfOperationKind.Reg13:
            case DwarfOperationKind.Reg14:
            case DwarfOperationKind.Reg15:
            case DwarfOperationKind.Reg16:
            case DwarfOperationKind.Reg17:
            case DwarfOperationKind.Reg18:
            case DwarfOperationKind.Reg19:
            case DwarfOperationKind.Reg20:
            case DwarfOperationKind.Reg21:
            case DwarfOperationKind.Reg22:
            case DwarfOperationKind.Reg23:
            case DwarfOperationKind.Reg24:
            case DwarfOperationKind.Reg25:
            case DwarfOperationKind.Reg26:
            case DwarfOperationKind.Reg27:
            case DwarfOperationKind.Reg28:
            case DwarfOperationKind.Reg29:
            case DwarfOperationKind.Reg30:
            case DwarfOperationKind.Reg31:
            case DwarfOperationKind.StackValue:
                break;

            case DwarfOperationKind.Breg0:
            case DwarfOperationKind.Breg1:
            case DwarfOperationKind.Breg2:
            case DwarfOperationKind.Breg3:
            case DwarfOperationKind.Breg4:
            case DwarfOperationKind.Breg5:
            case DwarfOperationKind.Breg6:
            case DwarfOperationKind.Breg7:
            case DwarfOperationKind.Breg8:
            case DwarfOperationKind.Breg9:
            case DwarfOperationKind.Breg10:
            case DwarfOperationKind.Breg11:
            case DwarfOperationKind.Breg12:
            case DwarfOperationKind.Breg13:
            case DwarfOperationKind.Breg14:
            case DwarfOperationKind.Breg15:
            case DwarfOperationKind.Breg16:
            case DwarfOperationKind.Breg17:
            case DwarfOperationKind.Breg18:
            case DwarfOperationKind.Breg19:
            case DwarfOperationKind.Breg20:
            case DwarfOperationKind.Breg21:
            case DwarfOperationKind.Breg22:
            case DwarfOperationKind.Breg23:
            case DwarfOperationKind.Breg24:
            case DwarfOperationKind.Breg25:
            case DwarfOperationKind.Breg26:
            case DwarfOperationKind.Breg27:
            case DwarfOperationKind.Breg28:
            case DwarfOperationKind.Breg29:
            case DwarfOperationKind.Breg30:
            case DwarfOperationKind.Breg31:
                writer.WriteILEB128(Operand2.I64);
                break;

            case DwarfOperationKind.Bregx:
                writer.WriteULEB128(Operand1.U64);
                writer.WriteILEB128(Operand2.I64);
                break;

            case DwarfOperationKind.Call2:
                writer.WriteU16((ushort)((DwarfDIE)Operand0).Offset);
                break;

            case DwarfOperationKind.Call4:
                writer.WriteU32((uint)((DwarfDIE)Operand0).Offset);
                break;

            case DwarfOperationKind.CallRef:
                writer.WriteUInt(((DwarfDIE)Operand0).Offset);
                break;

            case DwarfOperationKind.BitPiece:
                writer.WriteULEB128(Operand1.U64);
                writer.WriteULEB128(Operand2.U64);
                break;

            case DwarfOperationKind.ImplicitValue:
            {
                var stream = (Stream)Operand0;
                writer.WriteULEB128((ulong)stream.Position);
                writer.Write(stream);
                break;
            }

            case DwarfOperationKind.ImplicitPointer:
            case DwarfOperationKind.GNUImplicitPointer:
            {
                ulong offset = ((DwarfDIE)Operand0).Offset;
                //  a reference to a debugging information entry that describes the dereferenced object’s value
                if (writer.CurrentUnit.Version == 2)
                {
                    writer.WriteUInt(offset);
                }
                else
                {
                    writer.WriteUIntFromEncoding(offset);
                }
                //  a signed number that is treated as a byte offset from the start of that value
                writer.WriteILEB128(Operand1.I64);
                break;
            }

            case DwarfOperationKind.EntryValue:
            case DwarfOperationKind.GNUEntryValue:
            {
                var expression = (DwarfExpression)Operand0;
                writer.WriteULEB128(expression.Size);
                expression.WriteInternal(writer);
                break;
            }

            case DwarfOperationKind.ConstType:
            case DwarfOperationKind.GNUConstType:
            {
                // The DW_OP_const_type operation takes three operands

                // The first operand is an unsigned LEB128 integer that represents the offset
                // of a debugging information entry in the current compilation unit, which
                // must be a DW_TAG_base_type entry that provides the type of the constant provided
                writer.WriteULEB128(((DwarfDIE)Operand0).Offset);
                WriteEncodedValue(writer, Kind, Operand1.U64, (byte)Operand2.U64);
                break;
            }

            case DwarfOperationKind.RegvalType:
            case DwarfOperationKind.GNURegvalType:
            {
                // The DW_OP_regval_type operation provides the contents of a given register
                // interpreted as a value of a given type

                // The first operand is an unsigned LEB128 number, which identifies a register
                // whose contents is to be pushed onto the stack
                writer.WriteULEB128(Operand1.U64);

                // The second operand is an unsigned LEB128 number that represents the offset
                // of a debugging information entry in the current compilation unit
                writer.WriteULEB128(((DwarfDIE)Operand0).Offset);
                break;
            }

            case DwarfOperationKind.DerefType:
            case DwarfOperationKind.GNUDerefType:
            case DwarfOperationKind.XderefType:
            {
                // The DW_OP_deref_type operation behaves like the DW_OP_deref_size operation:
                // it pops the top stack entry and treats it as an address.

                // This operand is a 1-byte unsigned integral constant whose value which is the
                // same as the size of the base type referenced by the second operand
                writer.WriteU8((byte)Operand1.U64);

                // The second operand is an unsigned LEB128 number that represents the offset
                // of a debugging information entry in the current compilation unit
                writer.WriteULEB128(((DwarfDIE)Operand0).Offset);
                break;
            }

            case DwarfOperationKind.Convert:
            case DwarfOperationKind.GNUConvert:
            case DwarfOperationKind.Reinterpret:
            case DwarfOperationKind.GNUReinterpret:
                writer.WriteULEB128(((DwarfDIE)Operand0).Offset);
                break;

            case DwarfOperationKind.GNUPushTlsAddress:
            case DwarfOperationKind.GNUUninit:
                break;

            case DwarfOperationKind.GNUEncodedAddr:
                WriteEncodedValue(writer, Kind, Operand1.U64, (byte)Operand2.U64);
                break;

            case DwarfOperationKind.GNUParameterRef:
                writer.WriteU32((uint)Operand1.U64);
                break;

            default:
                throw new NotSupportedException($"The {nameof(DwarfOperationKind)} {Kind} is not supported");
            }

            Debug.Assert(writer.Offset - startOpOffset == Size);
        }