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-rw-r--r--vendor/gimli-0.26.2/src/write/op.rs1621
1 files changed, 1621 insertions, 0 deletions
diff --git a/vendor/gimli-0.26.2/src/write/op.rs b/vendor/gimli-0.26.2/src/write/op.rs
new file mode 100644
index 000000000..c70eec2dd
--- /dev/null
+++ b/vendor/gimli-0.26.2/src/write/op.rs
@@ -0,0 +1,1621 @@
+use alloc::boxed::Box;
+use alloc::vec::Vec;
+
+use crate::common::{Encoding, Register};
+use crate::constants::{self, DwOp};
+use crate::leb128::write::{sleb128_size, uleb128_size};
+use crate::write::{
+ Address, DebugInfoReference, Error, Reference, Result, UnitEntryId, UnitOffsets, Writer,
+};
+
+/// The bytecode for a DWARF expression or location description.
+#[derive(Debug, Default, Clone, PartialEq, Eq, Hash)]
+pub struct Expression {
+ operations: Vec<Operation>,
+}
+
+impl Expression {
+ /// Create an empty expression.
+ #[inline]
+ pub fn new() -> Self {
+ Self::default()
+ }
+
+ /// Create an expression from raw bytecode.
+ ///
+ /// This does not support operations that require references, such as `DW_OP_addr`.
+ #[inline]
+ pub fn raw(bytecode: Vec<u8>) -> Self {
+ Expression {
+ operations: vec![Operation::Raw(bytecode)],
+ }
+ }
+
+ /// Add an operation to the expression.
+ ///
+ /// This should only be used for operations that have no explicit operands.
+ pub fn op(&mut self, opcode: DwOp) {
+ self.operations.push(Operation::Simple(opcode));
+ }
+
+ /// Add a `DW_OP_addr` operation to the expression.
+ pub fn op_addr(&mut self, address: Address) {
+ self.operations.push(Operation::Address(address));
+ }
+
+ /// Add a `DW_OP_constu` operation to the expression.
+ ///
+ /// This may be emitted as a smaller equivalent operation.
+ pub fn op_constu(&mut self, value: u64) {
+ self.operations.push(Operation::UnsignedConstant(value));
+ }
+
+ /// Add a `DW_OP_consts` operation to the expression.
+ ///
+ /// This may be emitted as a smaller equivalent operation.
+ pub fn op_consts(&mut self, value: i64) {
+ self.operations.push(Operation::SignedConstant(value));
+ }
+
+ /// Add a `DW_OP_const_type` or `DW_OP_GNU_const_type` operation to the expression.
+ pub fn op_const_type(&mut self, base: UnitEntryId, value: Box<[u8]>) {
+ self.operations.push(Operation::ConstantType(base, value));
+ }
+
+ /// Add a `DW_OP_fbreg` operation to the expression.
+ pub fn op_fbreg(&mut self, offset: i64) {
+ self.operations.push(Operation::FrameOffset(offset));
+ }
+
+ /// Add a `DW_OP_bregx` operation to the expression.
+ ///
+ /// This may be emitted as a smaller equivalent operation.
+ pub fn op_breg(&mut self, register: Register, offset: i64) {
+ self.operations
+ .push(Operation::RegisterOffset(register, offset));
+ }
+
+ /// Add a `DW_OP_regval_type` or `DW_OP_GNU_regval_type` operation to the expression.
+ ///
+ /// This may be emitted as a smaller equivalent operation.
+ pub fn op_regval_type(&mut self, register: Register, base: UnitEntryId) {
+ self.operations
+ .push(Operation::RegisterType(register, base));
+ }
+
+ /// Add a `DW_OP_pick` operation to the expression.
+ ///
+ /// This may be emitted as a `DW_OP_dup` or `DW_OP_over` operation.
+ pub fn op_pick(&mut self, index: u8) {
+ self.operations.push(Operation::Pick(index));
+ }
+
+ /// Add a `DW_OP_deref` operation to the expression.
+ pub fn op_deref(&mut self) {
+ self.operations.push(Operation::Deref { space: false });
+ }
+
+ /// Add a `DW_OP_xderef` operation to the expression.
+ pub fn op_xderef(&mut self) {
+ self.operations.push(Operation::Deref { space: true });
+ }
+
+ /// Add a `DW_OP_deref_size` operation to the expression.
+ pub fn op_deref_size(&mut self, size: u8) {
+ self.operations
+ .push(Operation::DerefSize { size, space: false });
+ }
+
+ /// Add a `DW_OP_xderef_size` operation to the expression.
+ pub fn op_xderef_size(&mut self, size: u8) {
+ self.operations
+ .push(Operation::DerefSize { size, space: true });
+ }
+
+ /// Add a `DW_OP_deref_type` or `DW_OP_GNU_deref_type` operation to the expression.
+ pub fn op_deref_type(&mut self, size: u8, base: UnitEntryId) {
+ self.operations.push(Operation::DerefType {
+ size,
+ base,
+ space: false,
+ });
+ }
+
+ /// Add a `DW_OP_xderef_type` operation to the expression.
+ pub fn op_xderef_type(&mut self, size: u8, base: UnitEntryId) {
+ self.operations.push(Operation::DerefType {
+ size,
+ base,
+ space: true,
+ });
+ }
+
+ /// Add a `DW_OP_plus_uconst` operation to the expression.
+ pub fn op_plus_uconst(&mut self, value: u64) {
+ self.operations.push(Operation::PlusConstant(value));
+ }
+
+ /// Add a `DW_OP_skip` operation to the expression.
+ ///
+ /// Returns the index of the operation. The caller must call `set_target` with
+ /// this index to set the target of the branch.
+ pub fn op_skip(&mut self) -> usize {
+ let index = self.next_index();
+ self.operations.push(Operation::Skip(!0));
+ index
+ }
+
+ /// Add a `DW_OP_bra` operation to the expression.
+ ///
+ /// Returns the index of the operation. The caller must call `set_target` with
+ /// this index to set the target of the branch.
+ pub fn op_bra(&mut self) -> usize {
+ let index = self.next_index();
+ self.operations.push(Operation::Branch(!0));
+ index
+ }
+
+ /// Return the index that will be assigned to the next operation.
+ ///
+ /// This can be passed to `set_target`.
+ #[inline]
+ pub fn next_index(&self) -> usize {
+ self.operations.len()
+ }
+
+ /// Set the target of a `DW_OP_skip` or `DW_OP_bra` operation .
+ pub fn set_target(&mut self, operation: usize, new_target: usize) {
+ debug_assert!(new_target <= self.next_index());
+ debug_assert_ne!(operation, new_target);
+ match self.operations[operation] {
+ Operation::Skip(ref mut target) | Operation::Branch(ref mut target) => {
+ *target = new_target;
+ }
+ _ => unimplemented!(),
+ }
+ }
+
+ /// Add a `DW_OP_call4` operation to the expression.
+ pub fn op_call(&mut self, entry: UnitEntryId) {
+ self.operations.push(Operation::Call(entry));
+ }
+
+ /// Add a `DW_OP_call_ref` operation to the expression.
+ pub fn op_call_ref(&mut self, entry: Reference) {
+ self.operations.push(Operation::CallRef(entry));
+ }
+
+ /// Add a `DW_OP_convert` or `DW_OP_GNU_convert` operation to the expression.
+ ///
+ /// `base` is the DIE of the base type, or `None` for the generic type.
+ pub fn op_convert(&mut self, base: Option<UnitEntryId>) {
+ self.operations.push(Operation::Convert(base));
+ }
+
+ /// Add a `DW_OP_reinterpret` or `DW_OP_GNU_reinterpret` operation to the expression.
+ ///
+ /// `base` is the DIE of the base type, or `None` for the generic type.
+ pub fn op_reinterpret(&mut self, base: Option<UnitEntryId>) {
+ self.operations.push(Operation::Reinterpret(base));
+ }
+
+ /// Add a `DW_OP_entry_value` or `DW_OP_GNU_entry_value` operation to the expression.
+ pub fn op_entry_value(&mut self, expression: Expression) {
+ self.operations.push(Operation::EntryValue(expression));
+ }
+
+ /// Add a `DW_OP_regx` operation to the expression.
+ ///
+ /// This may be emitted as a smaller equivalent operation.
+ pub fn op_reg(&mut self, register: Register) {
+ self.operations.push(Operation::Register(register));
+ }
+
+ /// Add a `DW_OP_implicit_value` operation to the expression.
+ pub fn op_implicit_value(&mut self, data: Box<[u8]>) {
+ self.operations.push(Operation::ImplicitValue(data));
+ }
+
+ /// Add a `DW_OP_implicit_pointer` or `DW_OP_GNU_implicit_pointer` operation to the expression.
+ pub fn op_implicit_pointer(&mut self, entry: Reference, byte_offset: i64) {
+ self.operations
+ .push(Operation::ImplicitPointer { entry, byte_offset });
+ }
+
+ /// Add a `DW_OP_piece` operation to the expression.
+ pub fn op_piece(&mut self, size_in_bytes: u64) {
+ self.operations.push(Operation::Piece { size_in_bytes });
+ }
+
+ /// Add a `DW_OP_bit_piece` operation to the expression.
+ pub fn op_bit_piece(&mut self, size_in_bits: u64, bit_offset: u64) {
+ self.operations.push(Operation::BitPiece {
+ size_in_bits,
+ bit_offset,
+ });
+ }
+
+ /// Add a `DW_OP_GNU_parameter_ref` operation to the expression.
+ pub fn op_gnu_parameter_ref(&mut self, entry: UnitEntryId) {
+ self.operations.push(Operation::ParameterRef(entry));
+ }
+
+ /// Add a `DW_OP_WASM_location 0x0` operation to the expression.
+ pub fn op_wasm_local(&mut self, index: u32) {
+ self.operations.push(Operation::WasmLocal(index));
+ }
+
+ /// Add a `DW_OP_WASM_location 0x1` operation to the expression.
+ pub fn op_wasm_global(&mut self, index: u32) {
+ self.operations.push(Operation::WasmGlobal(index));
+ }
+
+ /// Add a `DW_OP_WASM_location 0x2` operation to the expression.
+ pub fn op_wasm_stack(&mut self, index: u32) {
+ self.operations.push(Operation::WasmStack(index));
+ }
+
+ pub(crate) fn size(&self, encoding: Encoding, unit_offsets: Option<&UnitOffsets>) -> usize {
+ let mut size = 0;
+ for operation in &self.operations {
+ size += operation.size(encoding, unit_offsets);
+ }
+ size
+ }
+
+ pub(crate) fn write<W: Writer>(
+ &self,
+ w: &mut W,
+ mut refs: Option<&mut Vec<DebugInfoReference>>,
+ encoding: Encoding,
+ unit_offsets: Option<&UnitOffsets>,
+ ) -> Result<()> {
+ // TODO: only calculate offsets if needed?
+ let mut offsets = Vec::with_capacity(self.operations.len());
+ let mut offset = w.len();
+ for operation in &self.operations {
+ offsets.push(offset);
+ offset += operation.size(encoding, unit_offsets);
+ }
+ offsets.push(offset);
+ for (operation, offset) in self.operations.iter().zip(offsets.iter().copied()) {
+ let refs = match refs {
+ Some(ref mut refs) => Some(&mut **refs),
+ None => None,
+ };
+ debug_assert_eq!(w.len(), offset);
+ operation.write(w, refs, encoding, unit_offsets, &offsets)?;
+ }
+ Ok(())
+ }
+}
+
+/// A single DWARF operation.
+//
+// This type is intentionally not public so that we can change the
+// representation of expressions as needed.
+//
+// Variants are listed in the order they appear in Section 2.5.
+#[derive(Debug, Clone, PartialEq, Eq, Hash)]
+enum Operation {
+ /// Raw bytecode.
+ ///
+ /// Does not support references.
+ Raw(Vec<u8>),
+ /// An operation that has no explicit operands.
+ ///
+ /// Represents:
+ /// - `DW_OP_drop`, `DW_OP_swap`, `DW_OP_rot`
+ /// - `DW_OP_push_object_address`, `DW_OP_form_tls_address`, `DW_OP_call_frame_cfa`
+ /// - `DW_OP_abs`, `DW_OP_and`, `DW_OP_div`, `DW_OP_minus`, `DW_OP_mod`, `DW_OP_mul`,
+ /// `DW_OP_neg`, `DW_OP_not`, `DW_OP_or`, `DW_OP_plus`, `DW_OP_shl`, `DW_OP_shr`,
+ /// `DW_OP_shra`, `DW_OP_xor`
+ /// - `DW_OP_le`, `DW_OP_ge`, `DW_OP_eq`, `DW_OP_lt`, `DW_OP_gt`, `DW_OP_ne`
+ /// - `DW_OP_nop`
+ /// - `DW_OP_stack_value`
+ Simple(DwOp),
+ /// Relocate the address if needed, and push it on the stack.
+ ///
+ /// Represents `DW_OP_addr`.
+ Address(Address),
+ /// Push an unsigned constant value on the stack.
+ ///
+ /// Represents `DW_OP_constu`.
+ UnsignedConstant(u64),
+ /// Push a signed constant value on the stack.
+ ///
+ /// Represents `DW_OP_consts`.
+ SignedConstant(i64),
+ /* TODO: requires .debug_addr write support
+ /// Read the address at the given index in `.debug_addr, relocate the address if needed,
+ /// and push it on the stack.
+ ///
+ /// Represents `DW_OP_addrx`.
+ AddressIndex(DebugAddrIndex<Offset>),
+ /// Read the address at the given index in `.debug_addr, and push it on the stack.
+ /// Do not relocate the address.
+ ///
+ /// Represents `DW_OP_constx`.
+ ConstantIndex(DebugAddrIndex<Offset>),
+ */
+ /// Interpret the value bytes as a constant of a given type, and push it on the stack.
+ ///
+ /// Represents `DW_OP_const_type`.
+ ConstantType(UnitEntryId, Box<[u8]>),
+ /// Compute the frame base (using `DW_AT_frame_base`), add the
+ /// given offset, and then push the resulting sum on the stack.
+ ///
+ /// Represents `DW_OP_fbreg`.
+ FrameOffset(i64),
+ /// Find the contents of the given register, add the offset, and then
+ /// push the resulting sum on the stack.
+ ///
+ /// Represents `DW_OP_bregx`.
+ RegisterOffset(Register, i64),
+ /// Interpret the contents of the given register as a value of the given type,
+ /// and push it on the stack.
+ ///
+ /// Represents `DW_OP_regval_type`.
+ RegisterType(Register, UnitEntryId),
+ /// Copy the item at a stack index and push it on top of the stack.
+ ///
+ /// Represents `DW_OP_pick`, `DW_OP_dup`, and `DW_OP_over`.
+ Pick(u8),
+ /// Pop the topmost value of the stack, dereference it, and push the
+ /// resulting value.
+ ///
+ /// Represents `DW_OP_deref` and `DW_OP_xderef`.
+ Deref {
+ /// True if the dereference operation takes an address space
+ /// argument from the stack; false otherwise.
+ space: bool,
+ },
+ /// Pop the topmost value of the stack, dereference it to obtain a value
+ /// of the given size, and push the resulting value.
+ ///
+ /// Represents `DW_OP_deref_size` and `DW_OP_xderef_size`.
+ DerefSize {
+ /// True if the dereference operation takes an address space
+ /// argument from the stack; false otherwise.
+ space: bool,
+ /// The size of the data to dereference.
+ size: u8,
+ },
+ /// Pop the topmost value of the stack, dereference it to obtain a value
+ /// of the given type, and push the resulting value.
+ ///
+ /// Represents `DW_OP_deref_type` and `DW_OP_xderef_type`.
+ DerefType {
+ /// True if the dereference operation takes an address space
+ /// argument from the stack; false otherwise.
+ space: bool,
+ /// The size of the data to dereference.
+ size: u8,
+ /// The DIE of the base type, or `None` for the generic type.
+ base: UnitEntryId,
+ },
+ /// Add an unsigned constant to the topmost value on the stack.
+ ///
+ /// Represents `DW_OP_plus_uconst`.
+ PlusConstant(u64),
+ /// Unconditional branch to the target location.
+ ///
+ /// The value is the index within the expression of the operation to branch to.
+ /// This will be converted to a relative offset when writing.
+ ///
+ /// Represents `DW_OP_skip`.
+ Skip(usize),
+ /// Branch to the target location if the top of stack is nonzero.
+ ///
+ /// The value is the index within the expression of the operation to branch to.
+ /// This will be converted to a relative offset when writing.
+ ///
+ /// Represents `DW_OP_bra`.
+ Branch(usize),
+ /// Evaluate a DWARF expression as a subroutine.
+ ///
+ /// The expression comes from the `DW_AT_location` attribute of the indicated DIE.
+ ///
+ /// Represents `DW_OP_call4`.
+ Call(UnitEntryId),
+ /// Evaluate an external DWARF expression as a subroutine.
+ ///
+ /// The expression comes from the `DW_AT_location` attribute of the indicated DIE,
+ /// which may be in another compilation unit or shared object.
+ ///
+ /// Represents `DW_OP_call_ref`.
+ CallRef(Reference),
+ /// Pop the top stack entry, convert it to a different type, and push it on the stack.
+ ///
+ /// Represents `DW_OP_convert`.
+ Convert(Option<UnitEntryId>),
+ /// Pop the top stack entry, reinterpret the bits in its value as a different type,
+ /// and push it on the stack.
+ ///
+ /// Represents `DW_OP_reinterpret`.
+ Reinterpret(Option<UnitEntryId>),
+ /// Evaluate an expression at the entry to the current subprogram, and push it on the stack.
+ ///
+ /// Represents `DW_OP_entry_value`.
+ EntryValue(Expression),
+ // FIXME: EntryRegister
+ /// Indicate that this piece's location is in the given register.
+ ///
+ /// Completes the piece or expression.
+ ///
+ /// Represents `DW_OP_regx`.
+ Register(Register),
+ /// The object has no location, but has a known constant value.
+ ///
+ /// Completes the piece or expression.
+ ///
+ /// Represents `DW_OP_implicit_value`.
+ ImplicitValue(Box<[u8]>),
+ /// The object is a pointer to a value which has no actual location, such as
+ /// an implicit value or a stack value.
+ ///
+ /// Completes the piece or expression.
+ ///
+ /// Represents `DW_OP_implicit_pointer`.
+ ImplicitPointer {
+ /// The DIE of the value that this is an implicit pointer into.
+ entry: Reference,
+ /// The byte offset into the value that the implicit pointer points to.
+ byte_offset: i64,
+ },
+ /// Terminate a piece.
+ ///
+ /// Represents `DW_OP_piece`.
+ Piece {
+ /// The size of this piece in bytes.
+ size_in_bytes: u64,
+ },
+ /// Terminate a piece with a size in bits.
+ ///
+ /// Represents `DW_OP_bit_piece`.
+ BitPiece {
+ /// The size of this piece in bits.
+ size_in_bits: u64,
+ /// The bit offset of this piece.
+ bit_offset: u64,
+ },
+ /// This represents a parameter that was optimized out.
+ ///
+ /// The entry is the definition of the parameter, and is matched to
+ /// the `DW_TAG_GNU_call_site_parameter` in the caller that also
+ /// points to the same definition of the parameter.
+ ///
+ /// Represents `DW_OP_GNU_parameter_ref`.
+ ParameterRef(UnitEntryId),
+ /// The index of a local in the currently executing function.
+ ///
+ /// Represents `DW_OP_WASM_location 0x00`.
+ WasmLocal(u32),
+ /// The index of a global.
+ ///
+ /// Represents `DW_OP_WASM_location 0x01`.
+ WasmGlobal(u32),
+ /// The index of an item on the operand stack.
+ ///
+ /// Represents `DW_OP_WASM_location 0x02`.
+ WasmStack(u32),
+}
+
+impl Operation {
+ fn size(&self, encoding: Encoding, unit_offsets: Option<&UnitOffsets>) -> usize {
+ let base_size = |base| {
+ // Errors are handled during writes.
+ match unit_offsets {
+ Some(offsets) => uleb128_size(offsets.unit_offset(base)),
+ None => 0,
+ }
+ };
+ 1 + match *self {
+ Operation::Raw(ref bytecode) => return bytecode.len(),
+ Operation::Simple(_) => 0,
+ Operation::Address(_) => encoding.address_size as usize,
+ Operation::UnsignedConstant(value) => {
+ if value < 32 {
+ 0
+ } else {
+ uleb128_size(value)
+ }
+ }
+ Operation::SignedConstant(value) => sleb128_size(value),
+ Operation::ConstantType(base, ref value) => base_size(base) + 1 + value.len(),
+ Operation::FrameOffset(offset) => sleb128_size(offset),
+ Operation::RegisterOffset(register, offset) => {
+ if register.0 < 32 {
+ sleb128_size(offset)
+ } else {
+ uleb128_size(register.0.into()) + sleb128_size(offset)
+ }
+ }
+ Operation::RegisterType(register, base) => {
+ uleb128_size(register.0.into()) + base_size(base)
+ }
+ Operation::Pick(index) => {
+ if index > 1 {
+ 1
+ } else {
+ 0
+ }
+ }
+ Operation::Deref { .. } => 0,
+ Operation::DerefSize { .. } => 1,
+ Operation::DerefType { base, .. } => 1 + base_size(base),
+ Operation::PlusConstant(value) => uleb128_size(value),
+ Operation::Skip(_) => 2,
+ Operation::Branch(_) => 2,
+ Operation::Call(_) => 4,
+ Operation::CallRef(_) => encoding.format.word_size() as usize,
+ Operation::Convert(base) => match base {
+ Some(base) => base_size(base),
+ None => 1,
+ },
+ Operation::Reinterpret(base) => match base {
+ Some(base) => base_size(base),
+ None => 1,
+ },
+ Operation::EntryValue(ref expression) => {
+ let length = expression.size(encoding, unit_offsets);
+ uleb128_size(length as u64) + length
+ }
+ Operation::Register(register) => {
+ if register.0 < 32 {
+ 0
+ } else {
+ uleb128_size(register.0.into())
+ }
+ }
+ Operation::ImplicitValue(ref data) => uleb128_size(data.len() as u64) + data.len(),
+ Operation::ImplicitPointer { byte_offset, .. } => {
+ encoding.format.word_size() as usize + sleb128_size(byte_offset)
+ }
+ Operation::Piece { size_in_bytes } => uleb128_size(size_in_bytes),
+ Operation::BitPiece {
+ size_in_bits,
+ bit_offset,
+ } => uleb128_size(size_in_bits) + uleb128_size(bit_offset),
+ Operation::ParameterRef(_) => 4,
+ Operation::WasmLocal(index)
+ | Operation::WasmGlobal(index)
+ | Operation::WasmStack(index) => 1 + uleb128_size(index.into()),
+ }
+ }
+
+ pub(crate) fn write<W: Writer>(
+ &self,
+ w: &mut W,
+ refs: Option<&mut Vec<DebugInfoReference>>,
+ encoding: Encoding,
+ unit_offsets: Option<&UnitOffsets>,
+ offsets: &[usize],
+ ) -> Result<()> {
+ let entry_offset = |entry| match unit_offsets {
+ Some(offsets) => {
+ let offset = offsets.unit_offset(entry);
+ if offset == 0 {
+ Err(Error::UnsupportedExpressionForwardReference)
+ } else {
+ Ok(offset)
+ }
+ }
+ None => Err(Error::UnsupportedCfiExpressionReference),
+ };
+ match *self {
+ Operation::Raw(ref bytecode) => w.write(bytecode)?,
+ Operation::Simple(opcode) => w.write_u8(opcode.0)?,
+ Operation::Address(address) => {
+ w.write_u8(constants::DW_OP_addr.0)?;
+ w.write_address(address, encoding.address_size)?;
+ }
+ Operation::UnsignedConstant(value) => {
+ if value < 32 {
+ w.write_u8(constants::DW_OP_lit0.0 + value as u8)?;
+ } else {
+ w.write_u8(constants::DW_OP_constu.0)?;
+ w.write_uleb128(value)?;
+ }
+ }
+ Operation::SignedConstant(value) => {
+ w.write_u8(constants::DW_OP_consts.0)?;
+ w.write_sleb128(value)?;
+ }
+ Operation::ConstantType(base, ref value) => {
+ if encoding.version >= 5 {
+ w.write_u8(constants::DW_OP_const_type.0)?;
+ } else {
+ w.write_u8(constants::DW_OP_GNU_const_type.0)?;
+ }
+ w.write_uleb128(entry_offset(base)?)?;
+ w.write_udata(value.len() as u64, 1)?;
+ w.write(&value)?;
+ }
+ Operation::FrameOffset(offset) => {
+ w.write_u8(constants::DW_OP_fbreg.0)?;
+ w.write_sleb128(offset)?;
+ }
+ Operation::RegisterOffset(register, offset) => {
+ if register.0 < 32 {
+ w.write_u8(constants::DW_OP_breg0.0 + register.0 as u8)?;
+ } else {
+ w.write_u8(constants::DW_OP_bregx.0)?;
+ w.write_uleb128(register.0.into())?;
+ }
+ w.write_sleb128(offset)?;
+ }
+ Operation::RegisterType(register, base) => {
+ if encoding.version >= 5 {
+ w.write_u8(constants::DW_OP_regval_type.0)?;
+ } else {
+ w.write_u8(constants::DW_OP_GNU_regval_type.0)?;
+ }
+ w.write_uleb128(register.0.into())?;
+ w.write_uleb128(entry_offset(base)?)?;
+ }
+ Operation::Pick(index) => match index {
+ 0 => w.write_u8(constants::DW_OP_dup.0)?,
+ 1 => w.write_u8(constants::DW_OP_over.0)?,
+ _ => {
+ w.write_u8(constants::DW_OP_pick.0)?;
+ w.write_u8(index)?;
+ }
+ },
+ Operation::Deref { space } => {
+ if space {
+ w.write_u8(constants::DW_OP_xderef.0)?;
+ } else {
+ w.write_u8(constants::DW_OP_deref.0)?;
+ }
+ }
+ Operation::DerefSize { space, size } => {
+ if space {
+ w.write_u8(constants::DW_OP_xderef_size.0)?;
+ } else {
+ w.write_u8(constants::DW_OP_deref_size.0)?;
+ }
+ w.write_u8(size)?;
+ }
+ Operation::DerefType { space, size, base } => {
+ if space {
+ w.write_u8(constants::DW_OP_xderef_type.0)?;
+ } else {
+ if encoding.version >= 5 {
+ w.write_u8(constants::DW_OP_deref_type.0)?;
+ } else {
+ w.write_u8(constants::DW_OP_GNU_deref_type.0)?;
+ }
+ }
+ w.write_u8(size)?;
+ w.write_uleb128(entry_offset(base)?)?;
+ }
+ Operation::PlusConstant(value) => {
+ w.write_u8(constants::DW_OP_plus_uconst.0)?;
+ w.write_uleb128(value)?;
+ }
+ Operation::Skip(target) => {
+ w.write_u8(constants::DW_OP_skip.0)?;
+ let offset = offsets[target] as i64 - (w.len() as i64 + 2);
+ w.write_sdata(offset, 2)?;
+ }
+ Operation::Branch(target) => {
+ w.write_u8(constants::DW_OP_bra.0)?;
+ let offset = offsets[target] as i64 - (w.len() as i64 + 2);
+ w.write_sdata(offset, 2)?;
+ }
+ Operation::Call(entry) => {
+ w.write_u8(constants::DW_OP_call4.0)?;
+ // TODO: this probably won't work in practice, because we may
+ // only know the offsets of base type DIEs at this point.
+ w.write_udata(entry_offset(entry)?, 4)?;
+ }
+ Operation::CallRef(entry) => {
+ w.write_u8(constants::DW_OP_call_ref.0)?;
+ let size = encoding.format.word_size();
+ match entry {
+ Reference::Symbol(symbol) => w.write_reference(symbol, size)?,
+ Reference::Entry(unit, entry) => {
+ let refs = refs.ok_or(Error::InvalidReference)?;
+ refs.push(DebugInfoReference {
+ offset: w.len(),
+ unit,
+ entry,
+ size,
+ });
+ w.write_udata(0, size)?;
+ }
+ }
+ }
+ Operation::Convert(base) => {
+ if encoding.version >= 5 {
+ w.write_u8(constants::DW_OP_convert.0)?;
+ } else {
+ w.write_u8(constants::DW_OP_GNU_convert.0)?;
+ }
+ match base {
+ Some(base) => w.write_uleb128(entry_offset(base)?)?,
+ None => w.write_u8(0)?,
+ }
+ }
+ Operation::Reinterpret(base) => {
+ if encoding.version >= 5 {
+ w.write_u8(constants::DW_OP_reinterpret.0)?;
+ } else {
+ w.write_u8(constants::DW_OP_GNU_reinterpret.0)?;
+ }
+ match base {
+ Some(base) => w.write_uleb128(entry_offset(base)?)?,
+ None => w.write_u8(0)?,
+ }
+ }
+ Operation::EntryValue(ref expression) => {
+ if encoding.version >= 5 {
+ w.write_u8(constants::DW_OP_entry_value.0)?;
+ } else {
+ w.write_u8(constants::DW_OP_GNU_entry_value.0)?;
+ }
+ let length = expression.size(encoding, unit_offsets);
+ w.write_uleb128(length as u64)?;
+ expression.write(w, refs, encoding, unit_offsets)?;
+ }
+ Operation::Register(register) => {
+ if register.0 < 32 {
+ w.write_u8(constants::DW_OP_reg0.0 + register.0 as u8)?;
+ } else {
+ w.write_u8(constants::DW_OP_regx.0)?;
+ w.write_uleb128(register.0.into())?;
+ }
+ }
+ Operation::ImplicitValue(ref data) => {
+ w.write_u8(constants::DW_OP_implicit_value.0)?;
+ w.write_uleb128(data.len() as u64)?;
+ w.write(&data)?;
+ }
+ Operation::ImplicitPointer { entry, byte_offset } => {
+ if encoding.version >= 5 {
+ w.write_u8(constants::DW_OP_implicit_pointer.0)?;
+ } else {
+ w.write_u8(constants::DW_OP_GNU_implicit_pointer.0)?;
+ }
+ let size = if encoding.version == 2 {
+ encoding.address_size
+ } else {
+ encoding.format.word_size()
+ };
+ match entry {
+ Reference::Symbol(symbol) => {
+ w.write_reference(symbol, size)?;
+ }
+ Reference::Entry(unit, entry) => {
+ let refs = refs.ok_or(Error::InvalidReference)?;
+ refs.push(DebugInfoReference {
+ offset: w.len(),
+ unit,
+ entry,
+ size,
+ });
+ w.write_udata(0, size)?;
+ }
+ }
+ w.write_sleb128(byte_offset)?;
+ }
+ Operation::Piece { size_in_bytes } => {
+ w.write_u8(constants::DW_OP_piece.0)?;
+ w.write_uleb128(size_in_bytes)?;
+ }
+ Operation::BitPiece {
+ size_in_bits,
+ bit_offset,
+ } => {
+ w.write_u8(constants::DW_OP_bit_piece.0)?;
+ w.write_uleb128(size_in_bits)?;
+ w.write_uleb128(bit_offset)?;
+ }
+ Operation::ParameterRef(entry) => {
+ w.write_u8(constants::DW_OP_GNU_parameter_ref.0)?;
+ w.write_udata(entry_offset(entry)?, 4)?;
+ }
+ Operation::WasmLocal(index) => {
+ w.write(&[constants::DW_OP_WASM_location.0, 0])?;
+ w.write_uleb128(index.into())?;
+ }
+ Operation::WasmGlobal(index) => {
+ w.write(&[constants::DW_OP_WASM_location.0, 1])?;
+ w.write_uleb128(index.into())?;
+ }
+ Operation::WasmStack(index) => {
+ w.write(&[constants::DW_OP_WASM_location.0, 2])?;
+ w.write_uleb128(index.into())?;
+ }
+ }
+ Ok(())
+ }
+}
+
+#[cfg(feature = "read")]
+pub(crate) mod convert {
+ use super::*;
+ use crate::common::UnitSectionOffset;
+ use crate::read::{self, Reader};
+ use crate::write::{ConvertError, ConvertResult, UnitEntryId, UnitId};
+ use std::collections::HashMap;
+
+ impl Expression {
+ /// Create an expression from the input expression.
+ pub fn from<R: Reader<Offset = usize>>(
+ from_expression: read::Expression<R>,
+ encoding: Encoding,
+ dwarf: Option<&read::Dwarf<R>>,
+ unit: Option<&read::Unit<R>>,
+ entry_ids: Option<&HashMap<UnitSectionOffset, (UnitId, UnitEntryId)>>,
+ convert_address: &dyn Fn(u64) -> Option<Address>,
+ ) -> ConvertResult<Expression> {
+ let convert_unit_offset = |offset: read::UnitOffset| -> ConvertResult<_> {
+ let entry_ids = entry_ids.ok_or(ConvertError::UnsupportedOperation)?;
+ let unit = unit.ok_or(ConvertError::UnsupportedOperation)?;
+ let id = entry_ids
+ .get(&offset.to_unit_section_offset(unit))
+ .ok_or(ConvertError::InvalidUnitRef)?;
+ Ok(id.1)
+ };
+ let convert_debug_info_offset = |offset| -> ConvertResult<_> {
+ // TODO: support relocations
+ let entry_ids = entry_ids.ok_or(ConvertError::UnsupportedOperation)?;
+ let id = entry_ids
+ .get(&UnitSectionOffset::DebugInfoOffset(offset))
+ .ok_or(ConvertError::InvalidDebugInfoRef)?;
+ Ok(Reference::Entry(id.0, id.1))
+ };
+
+ // Calculate offsets for use in branch/skip operations.
+ let mut offsets = Vec::new();
+ let mut offset = 0;
+ let mut from_operations = from_expression.clone().operations(encoding);
+ while let Some(_) = from_operations.next()? {
+ offsets.push(offset);
+ offset = from_operations.offset_from(&from_expression);
+ }
+ offsets.push(from_expression.0.len());
+
+ let mut from_operations = from_expression.clone().operations(encoding);
+ let mut operations = Vec::new();
+ while let Some(from_operation) = from_operations.next()? {
+ let operation = match from_operation {
+ read::Operation::Deref {
+ base_type,
+ size,
+ space,
+ } => {
+ if base_type.0 != 0 {
+ let base = convert_unit_offset(base_type)?;
+ Operation::DerefType { space, size, base }
+ } else if size != encoding.address_size {
+ Operation::DerefSize { space, size }
+ } else {
+ Operation::Deref { space }
+ }
+ }
+ read::Operation::Drop => Operation::Simple(constants::DW_OP_drop),
+ read::Operation::Pick { index } => Operation::Pick(index),
+ read::Operation::Swap => Operation::Simple(constants::DW_OP_swap),
+ read::Operation::Rot => Operation::Simple(constants::DW_OP_rot),
+ read::Operation::Abs => Operation::Simple(constants::DW_OP_abs),
+ read::Operation::And => Operation::Simple(constants::DW_OP_and),
+ read::Operation::Div => Operation::Simple(constants::DW_OP_div),
+ read::Operation::Minus => Operation::Simple(constants::DW_OP_minus),
+ read::Operation::Mod => Operation::Simple(constants::DW_OP_mod),
+ read::Operation::Mul => Operation::Simple(constants::DW_OP_mul),
+ read::Operation::Neg => Operation::Simple(constants::DW_OP_neg),
+ read::Operation::Not => Operation::Simple(constants::DW_OP_not),
+ read::Operation::Or => Operation::Simple(constants::DW_OP_or),
+ read::Operation::Plus => Operation::Simple(constants::DW_OP_plus),
+ read::Operation::PlusConstant { value } => Operation::PlusConstant(value),
+ read::Operation::Shl => Operation::Simple(constants::DW_OP_shl),
+ read::Operation::Shr => Operation::Simple(constants::DW_OP_shr),
+ read::Operation::Shra => Operation::Simple(constants::DW_OP_shra),
+ read::Operation::Xor => Operation::Simple(constants::DW_OP_xor),
+ read::Operation::Eq => Operation::Simple(constants::DW_OP_eq),
+ read::Operation::Ge => Operation::Simple(constants::DW_OP_ge),
+ read::Operation::Gt => Operation::Simple(constants::DW_OP_gt),
+ read::Operation::Le => Operation::Simple(constants::DW_OP_le),
+ read::Operation::Lt => Operation::Simple(constants::DW_OP_lt),
+ read::Operation::Ne => Operation::Simple(constants::DW_OP_ne),
+ read::Operation::Bra { target } => {
+ let offset = from_operations
+ .offset_from(&from_expression)
+ .wrapping_add(i64::from(target) as usize);
+ let index = offsets
+ .binary_search(&offset)
+ .map_err(|_| ConvertError::InvalidBranchTarget)?;
+ Operation::Branch(index)
+ }
+ read::Operation::Skip { target } => {
+ let offset = from_operations
+ .offset_from(&from_expression)
+ .wrapping_add(i64::from(target) as usize);
+ let index = offsets
+ .binary_search(&offset)
+ .map_err(|_| ConvertError::InvalidBranchTarget)?;
+ Operation::Skip(index)
+ }
+ read::Operation::UnsignedConstant { value } => {
+ Operation::UnsignedConstant(value)
+ }
+ read::Operation::SignedConstant { value } => Operation::SignedConstant(value),
+ read::Operation::Register { register } => Operation::Register(register),
+ read::Operation::RegisterOffset {
+ register,
+ offset,
+ base_type,
+ } => {
+ if base_type.0 != 0 {
+ Operation::RegisterType(register, convert_unit_offset(base_type)?)
+ } else {
+ Operation::RegisterOffset(register, offset)
+ }
+ }
+ read::Operation::FrameOffset { offset } => Operation::FrameOffset(offset),
+ read::Operation::Nop => Operation::Simple(constants::DW_OP_nop),
+ read::Operation::PushObjectAddress => {
+ Operation::Simple(constants::DW_OP_push_object_address)
+ }
+ read::Operation::Call { offset } => match offset {
+ read::DieReference::UnitRef(offset) => {
+ Operation::Call(convert_unit_offset(offset)?)
+ }
+ read::DieReference::DebugInfoRef(offset) => {
+ Operation::CallRef(convert_debug_info_offset(offset)?)
+ }
+ },
+ read::Operation::TLS => Operation::Simple(constants::DW_OP_form_tls_address),
+ read::Operation::CallFrameCFA => {
+ Operation::Simple(constants::DW_OP_call_frame_cfa)
+ }
+ read::Operation::Piece {
+ size_in_bits,
+ bit_offset: None,
+ } => Operation::Piece {
+ size_in_bytes: size_in_bits / 8,
+ },
+ read::Operation::Piece {
+ size_in_bits,
+ bit_offset: Some(bit_offset),
+ } => Operation::BitPiece {
+ size_in_bits,
+ bit_offset,
+ },
+ read::Operation::ImplicitValue { data } => {
+ Operation::ImplicitValue(data.to_slice()?.into_owned().into())
+ }
+ read::Operation::StackValue => Operation::Simple(constants::DW_OP_stack_value),
+ read::Operation::ImplicitPointer { value, byte_offset } => {
+ let entry = convert_debug_info_offset(value)?;
+ Operation::ImplicitPointer { entry, byte_offset }
+ }
+ read::Operation::EntryValue { expression } => {
+ let expression = Expression::from(
+ read::Expression(expression),
+ encoding,
+ dwarf,
+ unit,
+ entry_ids,
+ convert_address,
+ )?;
+ Operation::EntryValue(expression)
+ }
+ read::Operation::ParameterRef { offset } => {
+ let entry = convert_unit_offset(offset)?;
+ Operation::ParameterRef(entry)
+ }
+ read::Operation::Address { address } => {
+ let address =
+ convert_address(address).ok_or(ConvertError::InvalidAddress)?;
+ Operation::Address(address)
+ }
+ read::Operation::AddressIndex { index } => {
+ let dwarf = dwarf.ok_or(ConvertError::UnsupportedOperation)?;
+ let unit = unit.ok_or(ConvertError::UnsupportedOperation)?;
+ let val = dwarf.address(unit, index)?;
+ let address = convert_address(val).ok_or(ConvertError::InvalidAddress)?;
+ Operation::Address(address)
+ }
+ read::Operation::ConstantIndex { index } => {
+ let dwarf = dwarf.ok_or(ConvertError::UnsupportedOperation)?;
+ let unit = unit.ok_or(ConvertError::UnsupportedOperation)?;
+ let val = dwarf.address(unit, index)?;
+ Operation::UnsignedConstant(val)
+ }
+ read::Operation::TypedLiteral { base_type, value } => {
+ let entry = convert_unit_offset(base_type)?;
+ Operation::ConstantType(entry, value.to_slice()?.into_owned().into())
+ }
+ read::Operation::Convert { base_type } => {
+ if base_type.0 == 0 {
+ Operation::Convert(None)
+ } else {
+ let entry = convert_unit_offset(base_type)?;
+ Operation::Convert(Some(entry))
+ }
+ }
+ read::Operation::Reinterpret { base_type } => {
+ if base_type.0 == 0 {
+ Operation::Reinterpret(None)
+ } else {
+ let entry = convert_unit_offset(base_type)?;
+ Operation::Reinterpret(Some(entry))
+ }
+ }
+ read::Operation::WasmLocal { index } => Operation::WasmLocal(index),
+ read::Operation::WasmGlobal { index } => Operation::WasmGlobal(index),
+ read::Operation::WasmStack { index } => Operation::WasmStack(index),
+ };
+ operations.push(operation);
+ }
+ Ok(Expression { operations })
+ }
+ }
+}
+
+#[cfg(test)]
+#[cfg(feature = "read")]
+mod tests {
+ use super::*;
+ use crate::common::{
+ DebugAbbrevOffset, DebugAddrBase, DebugInfoOffset, DebugLocListsBase, DebugRngListsBase,
+ DebugStrOffsetsBase, Format, SectionId,
+ };
+ use crate::read;
+ use crate::write::{
+ DebugLineStrOffsets, DebugStrOffsets, EndianVec, LineProgram, Sections, Unit, UnitTable,
+ };
+ use crate::LittleEndian;
+ use std::collections::HashMap;
+
+ #[test]
+ fn test_operation() {
+ for &version in &[3, 4, 5] {
+ for &address_size in &[4, 8] {
+ for &format in &[Format::Dwarf32, Format::Dwarf64] {
+ let encoding = Encoding {
+ format,
+ version,
+ address_size,
+ };
+
+ let mut units = UnitTable::default();
+ let unit_id = units.add(Unit::new(encoding, LineProgram::none()));
+ let unit = units.get_mut(unit_id);
+ let entry_id = unit.add(unit.root(), constants::DW_TAG_base_type);
+ let reference = Reference::Entry(unit_id, entry_id);
+
+ let mut sections = Sections::new(EndianVec::new(LittleEndian));
+ let debug_line_str_offsets = DebugLineStrOffsets::none();
+ let debug_str_offsets = DebugStrOffsets::none();
+ let debug_info_offsets = units
+ .write(&mut sections, &debug_line_str_offsets, &debug_str_offsets)
+ .unwrap();
+ let unit_offsets = debug_info_offsets.unit_offsets(unit_id);
+ let debug_info_offset = unit_offsets.debug_info_offset(entry_id);
+ let entry_offset =
+ read::UnitOffset(unit_offsets.unit_offset(entry_id) as usize);
+
+ let mut reg_expression = Expression::new();
+ reg_expression.op_reg(Register(23));
+
+ let operations: &[(&dyn Fn(&mut Expression), Operation, read::Operation<_>)] =
+ &[
+ (
+ &|x| x.op_deref(),
+ Operation::Deref { space: false },
+ read::Operation::Deref {
+ base_type: read::UnitOffset(0),
+ size: address_size,
+ space: false,
+ },
+ ),
+ (
+ &|x| x.op_xderef(),
+ Operation::Deref { space: true },
+ read::Operation::Deref {
+ base_type: read::UnitOffset(0),
+ size: address_size,
+ space: true,
+ },
+ ),
+ (
+ &|x| x.op_deref_size(2),
+ Operation::DerefSize {
+ space: false,
+ size: 2,
+ },
+ read::Operation::Deref {
+ base_type: read::UnitOffset(0),
+ size: 2,
+ space: false,
+ },
+ ),
+ (
+ &|x| x.op_xderef_size(2),
+ Operation::DerefSize {
+ space: true,
+ size: 2,
+ },
+ read::Operation::Deref {
+ base_type: read::UnitOffset(0),
+ size: 2,
+ space: true,
+ },
+ ),
+ (
+ &|x| x.op_deref_type(2, entry_id),
+ Operation::DerefType {
+ space: false,
+ size: 2,
+ base: entry_id,
+ },
+ read::Operation::Deref {
+ base_type: entry_offset,
+ size: 2,
+ space: false,
+ },
+ ),
+ (
+ &|x| x.op_xderef_type(2, entry_id),
+ Operation::DerefType {
+ space: true,
+ size: 2,
+ base: entry_id,
+ },
+ read::Operation::Deref {
+ base_type: entry_offset,
+ size: 2,
+ space: true,
+ },
+ ),
+ (
+ &|x| x.op(constants::DW_OP_drop),
+ Operation::Simple(constants::DW_OP_drop),
+ read::Operation::Drop,
+ ),
+ (
+ &|x| x.op_pick(0),
+ Operation::Pick(0),
+ read::Operation::Pick { index: 0 },
+ ),
+ (
+ &|x| x.op_pick(1),
+ Operation::Pick(1),
+ read::Operation::Pick { index: 1 },
+ ),
+ (
+ &|x| x.op_pick(2),
+ Operation::Pick(2),
+ read::Operation::Pick { index: 2 },
+ ),
+ (
+ &|x| x.op(constants::DW_OP_swap),
+ Operation::Simple(constants::DW_OP_swap),
+ read::Operation::Swap,
+ ),
+ (
+ &|x| x.op(constants::DW_OP_rot),
+ Operation::Simple(constants::DW_OP_rot),
+ read::Operation::Rot,
+ ),
+ (
+ &|x| x.op(constants::DW_OP_abs),
+ Operation::Simple(constants::DW_OP_abs),
+ read::Operation::Abs,
+ ),
+ (
+ &|x| x.op(constants::DW_OP_and),
+ Operation::Simple(constants::DW_OP_and),
+ read::Operation::And,
+ ),
+ (
+ &|x| x.op(constants::DW_OP_div),
+ Operation::Simple(constants::DW_OP_div),
+ read::Operation::Div,
+ ),
+ (
+ &|x| x.op(constants::DW_OP_minus),
+ Operation::Simple(constants::DW_OP_minus),
+ read::Operation::Minus,
+ ),
+ (
+ &|x| x.op(constants::DW_OP_mod),
+ Operation::Simple(constants::DW_OP_mod),
+ read::Operation::Mod,
+ ),
+ (
+ &|x| x.op(constants::DW_OP_mul),
+ Operation::Simple(constants::DW_OP_mul),
+ read::Operation::Mul,
+ ),
+ (
+ &|x| x.op(constants::DW_OP_neg),
+ Operation::Simple(constants::DW_OP_neg),
+ read::Operation::Neg,
+ ),
+ (
+ &|x| x.op(constants::DW_OP_not),
+ Operation::Simple(constants::DW_OP_not),
+ read::Operation::Not,
+ ),
+ (
+ &|x| x.op(constants::DW_OP_or),
+ Operation::Simple(constants::DW_OP_or),
+ read::Operation::Or,
+ ),
+ (
+ &|x| x.op(constants::DW_OP_plus),
+ Operation::Simple(constants::DW_OP_plus),
+ read::Operation::Plus,
+ ),
+ (
+ &|x| x.op_plus_uconst(23),
+ Operation::PlusConstant(23),
+ read::Operation::PlusConstant { value: 23 },
+ ),
+ (
+ &|x| x.op(constants::DW_OP_shl),
+ Operation::Simple(constants::DW_OP_shl),
+ read::Operation::Shl,
+ ),
+ (
+ &|x| x.op(constants::DW_OP_shr),
+ Operation::Simple(constants::DW_OP_shr),
+ read::Operation::Shr,
+ ),
+ (
+ &|x| x.op(constants::DW_OP_shra),
+ Operation::Simple(constants::DW_OP_shra),
+ read::Operation::Shra,
+ ),
+ (
+ &|x| x.op(constants::DW_OP_xor),
+ Operation::Simple(constants::DW_OP_xor),
+ read::Operation::Xor,
+ ),
+ (
+ &|x| x.op(constants::DW_OP_eq),
+ Operation::Simple(constants::DW_OP_eq),
+ read::Operation::Eq,
+ ),
+ (
+ &|x| x.op(constants::DW_OP_ge),
+ Operation::Simple(constants::DW_OP_ge),
+ read::Operation::Ge,
+ ),
+ (
+ &|x| x.op(constants::DW_OP_gt),
+ Operation::Simple(constants::DW_OP_gt),
+ read::Operation::Gt,
+ ),
+ (
+ &|x| x.op(constants::DW_OP_le),
+ Operation::Simple(constants::DW_OP_le),
+ read::Operation::Le,
+ ),
+ (
+ &|x| x.op(constants::DW_OP_lt),
+ Operation::Simple(constants::DW_OP_lt),
+ read::Operation::Lt,
+ ),
+ (
+ &|x| x.op(constants::DW_OP_ne),
+ Operation::Simple(constants::DW_OP_ne),
+ read::Operation::Ne,
+ ),
+ (
+ &|x| x.op_constu(23),
+ Operation::UnsignedConstant(23),
+ read::Operation::UnsignedConstant { value: 23 },
+ ),
+ (
+ &|x| x.op_consts(-23),
+ Operation::SignedConstant(-23),
+ read::Operation::SignedConstant { value: -23 },
+ ),
+ (
+ &|x| x.op_reg(Register(23)),
+ Operation::Register(Register(23)),
+ read::Operation::Register {
+ register: Register(23),
+ },
+ ),
+ (
+ &|x| x.op_reg(Register(123)),
+ Operation::Register(Register(123)),
+ read::Operation::Register {
+ register: Register(123),
+ },
+ ),
+ (
+ &|x| x.op_breg(Register(23), 34),
+ Operation::RegisterOffset(Register(23), 34),
+ read::Operation::RegisterOffset {
+ register: Register(23),
+ offset: 34,
+ base_type: read::UnitOffset(0),
+ },
+ ),
+ (
+ &|x| x.op_breg(Register(123), 34),
+ Operation::RegisterOffset(Register(123), 34),
+ read::Operation::RegisterOffset {
+ register: Register(123),
+ offset: 34,
+ base_type: read::UnitOffset(0),
+ },
+ ),
+ (
+ &|x| x.op_regval_type(Register(23), entry_id),
+ Operation::RegisterType(Register(23), entry_id),
+ read::Operation::RegisterOffset {
+ register: Register(23),
+ offset: 0,
+ base_type: entry_offset,
+ },
+ ),
+ (
+ &|x| x.op_fbreg(34),
+ Operation::FrameOffset(34),
+ read::Operation::FrameOffset { offset: 34 },
+ ),
+ (
+ &|x| x.op(constants::DW_OP_nop),
+ Operation::Simple(constants::DW_OP_nop),
+ read::Operation::Nop,
+ ),
+ (
+ &|x| x.op(constants::DW_OP_push_object_address),
+ Operation::Simple(constants::DW_OP_push_object_address),
+ read::Operation::PushObjectAddress,
+ ),
+ (
+ &|x| x.op_call(entry_id),
+ Operation::Call(entry_id),
+ read::Operation::Call {
+ offset: read::DieReference::UnitRef(entry_offset),
+ },
+ ),
+ (
+ &|x| x.op_call_ref(reference),
+ Operation::CallRef(reference),
+ read::Operation::Call {
+ offset: read::DieReference::DebugInfoRef(debug_info_offset),
+ },
+ ),
+ (
+ &|x| x.op(constants::DW_OP_form_tls_address),
+ Operation::Simple(constants::DW_OP_form_tls_address),
+ read::Operation::TLS,
+ ),
+ (
+ &|x| x.op(constants::DW_OP_call_frame_cfa),
+ Operation::Simple(constants::DW_OP_call_frame_cfa),
+ read::Operation::CallFrameCFA,
+ ),
+ (
+ &|x| x.op_piece(23),
+ Operation::Piece { size_in_bytes: 23 },
+ read::Operation::Piece {
+ size_in_bits: 23 * 8,
+ bit_offset: None,
+ },
+ ),
+ (
+ &|x| x.op_bit_piece(23, 34),
+ Operation::BitPiece {
+ size_in_bits: 23,
+ bit_offset: 34,
+ },
+ read::Operation::Piece {
+ size_in_bits: 23,
+ bit_offset: Some(34),
+ },
+ ),
+ (
+ &|x| x.op_implicit_value(vec![23].into()),
+ Operation::ImplicitValue(vec![23].into()),
+ read::Operation::ImplicitValue {
+ data: read::EndianSlice::new(&[23], LittleEndian),
+ },
+ ),
+ (
+ &|x| x.op(constants::DW_OP_stack_value),
+ Operation::Simple(constants::DW_OP_stack_value),
+ read::Operation::StackValue,
+ ),
+ (
+ &|x| x.op_implicit_pointer(reference, 23),
+ Operation::ImplicitPointer {
+ entry: reference,
+ byte_offset: 23,
+ },
+ read::Operation::ImplicitPointer {
+ value: debug_info_offset,
+ byte_offset: 23,
+ },
+ ),
+ (
+ &|x| x.op_entry_value(reg_expression.clone()),
+ Operation::EntryValue(reg_expression.clone()),
+ read::Operation::EntryValue {
+ expression: read::EndianSlice::new(
+ &[constants::DW_OP_reg23.0],
+ LittleEndian,
+ ),
+ },
+ ),
+ (
+ &|x| x.op_gnu_parameter_ref(entry_id),
+ Operation::ParameterRef(entry_id),
+ read::Operation::ParameterRef {
+ offset: entry_offset,
+ },
+ ),
+ (
+ &|x| x.op_addr(Address::Constant(23)),
+ Operation::Address(Address::Constant(23)),
+ read::Operation::Address { address: 23 },
+ ),
+ (
+ &|x| x.op_const_type(entry_id, vec![23].into()),
+ Operation::ConstantType(entry_id, vec![23].into()),
+ read::Operation::TypedLiteral {
+ base_type: entry_offset,
+ value: read::EndianSlice::new(&[23], LittleEndian),
+ },
+ ),
+ (
+ &|x| x.op_convert(None),
+ Operation::Convert(None),
+ read::Operation::Convert {
+ base_type: read::UnitOffset(0),
+ },
+ ),
+ (
+ &|x| x.op_convert(Some(entry_id)),
+ Operation::Convert(Some(entry_id)),
+ read::Operation::Convert {
+ base_type: entry_offset,
+ },
+ ),
+ (
+ &|x| x.op_reinterpret(None),
+ Operation::Reinterpret(None),
+ read::Operation::Reinterpret {
+ base_type: read::UnitOffset(0),
+ },
+ ),
+ (
+ &|x| x.op_reinterpret(Some(entry_id)),
+ Operation::Reinterpret(Some(entry_id)),
+ read::Operation::Reinterpret {
+ base_type: entry_offset,
+ },
+ ),
+ (
+ &|x| x.op_wasm_local(1000),
+ Operation::WasmLocal(1000),
+ read::Operation::WasmLocal { index: 1000 },
+ ),
+ (
+ &|x| x.op_wasm_global(1000),
+ Operation::WasmGlobal(1000),
+ read::Operation::WasmGlobal { index: 1000 },
+ ),
+ (
+ &|x| x.op_wasm_stack(1000),
+ Operation::WasmStack(1000),
+ read::Operation::WasmStack { index: 1000 },
+ ),
+ ];
+
+ let mut expression = Expression::new();
+ let start_index = expression.next_index();
+ for (f, o, _) in operations {
+ f(&mut expression);
+ assert_eq!(expression.operations.last(), Some(o));
+ }
+
+ let bra_index = expression.op_bra();
+ let skip_index = expression.op_skip();
+ expression.op(constants::DW_OP_nop);
+ let end_index = expression.next_index();
+ expression.set_target(bra_index, start_index);
+ expression.set_target(skip_index, end_index);
+
+ let mut w = EndianVec::new(LittleEndian);
+ let mut refs = Vec::new();
+ expression
+ .write(&mut w, Some(&mut refs), encoding, Some(&unit_offsets))
+ .unwrap();
+ for r in &refs {
+ assert_eq!(r.unit, unit_id);
+ assert_eq!(r.entry, entry_id);
+ w.write_offset_at(
+ r.offset,
+ debug_info_offset.0,
+ SectionId::DebugInfo,
+ r.size,
+ )
+ .unwrap();
+ }
+
+ let read_expression =
+ read::Expression(read::EndianSlice::new(w.slice(), LittleEndian));
+ let mut read_operations = read_expression.operations(encoding);
+ for (_, _, operation) in operations {
+ assert_eq!(read_operations.next(), Ok(Some(*operation)));
+ }
+
+ // 4 = DW_OP_skip + i16 + DW_OP_nop
+ assert_eq!(
+ read_operations.next(),
+ Ok(Some(read::Operation::Bra {
+ target: -(w.len() as i16) + 4
+ }))
+ );
+ // 1 = DW_OP_nop
+ assert_eq!(
+ read_operations.next(),
+ Ok(Some(read::Operation::Skip { target: 1 }))
+ );
+ assert_eq!(read_operations.next(), Ok(Some(read::Operation::Nop)));
+ assert_eq!(read_operations.next(), Ok(None));
+
+ // Fake the unit.
+ let unit = read::Unit {
+ header: read::UnitHeader::new(
+ encoding,
+ 0,
+ read::UnitType::Compilation,
+ DebugAbbrevOffset(0),
+ DebugInfoOffset(0).into(),
+ read::EndianSlice::new(&[], LittleEndian),
+ ),
+ abbreviations: read::Abbreviations::default(),
+ name: None,
+ comp_dir: None,
+ low_pc: 0,
+ str_offsets_base: DebugStrOffsetsBase(0),
+ addr_base: DebugAddrBase(0),
+ loclists_base: DebugLocListsBase(0),
+ rnglists_base: DebugRngListsBase(0),
+ line_program: None,
+ dwo_id: None,
+ };
+
+ let mut entry_ids = HashMap::new();
+ entry_ids.insert(debug_info_offset.into(), (unit_id, entry_id));
+ let convert_expression = Expression::from(
+ read_expression,
+ encoding,
+ None, /* dwarf */
+ Some(&unit),
+ Some(&entry_ids),
+ &|address| Some(Address::Constant(address)),
+ )
+ .unwrap();
+ let mut convert_operations = convert_expression.operations.iter();
+ for (_, operation, _) in operations {
+ assert_eq!(convert_operations.next(), Some(operation));
+ }
+ assert_eq!(
+ convert_operations.next(),
+ Some(&Operation::Branch(start_index))
+ );
+ assert_eq!(convert_operations.next(), Some(&Operation::Skip(end_index)));
+ assert_eq!(
+ convert_operations.next(),
+ Some(&Operation::Simple(constants::DW_OP_nop))
+ );
+ }
+ }
+ }
+ }
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-05-21 22:59:43 +0000