Struct gimli::write::Expression

pub struct Expression { /* private fields */ }

The bytecode for a DWARF expression or location description.

Implementations

impl Expression

pub fn from<R: Reader<Offset = usize>>( from_expression: Expression<R>, encoding: Encoding, dwarf: Option<&Dwarf<R>>, unit: Option<&Unit<R>>, entry_ids: Option<&HashMap<UnitSectionOffset, (UnitId, UnitEntryId)>>, convert_address: &dyn Fn(u64) -> Option<Address> ) -> ConvertResult<Expression>

Create an expression from the input expression.

impl Expression

pub fn new() -> Self

Create an empty expression.

pub fn raw(bytecode: Vec<u8>) -> Self

Create an expression from raw bytecode.

This does not support operations that require references, such as DW_OP_addr.

pub fn op(&mut self, opcode: DwOp)

Add an operation to the expression.

This should only be used for operations that have no explicit operands.

pub fn op_addr(&mut self, address: Address)

Add a DW_OP_addr operation to the expression.

pub fn op_constu(&mut self, value: u64)

Add a DW_OP_constu operation to the expression.

This may be emitted as a smaller equivalent operation.

pub fn op_consts(&mut self, value: i64)

Add a DW_OP_consts operation to the expression.

This may be emitted as a smaller equivalent operation.

pub fn op_const_type(&mut self, base: UnitEntryId, value: Box<[u8]>)

Add a DW_OP_const_type or DW_OP_GNU_const_type operation to the expression.

pub fn op_fbreg(&mut self, offset: i64)

Add a DW_OP_fbreg operation to the expression.

pub fn op_breg(&mut self, register: Register, offset: i64)

Add a DW_OP_bregx operation to the expression.

This may be emitted as a smaller equivalent operation.

pub fn op_regval_type(&mut self, register: Register, base: UnitEntryId)

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_pick(&mut self, index: u8)

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_deref(&mut self)

Add a DW_OP_deref operation to the expression.

pub fn op_xderef(&mut self)

Add a DW_OP_xderef operation to the expression.

pub fn op_deref_size(&mut self, size: u8)

Add a DW_OP_deref_size operation to the expression.

pub fn op_xderef_size(&mut self, size: u8)

Add a DW_OP_xderef_size operation to the expression.

pub fn op_deref_type(&mut self, size: u8, base: UnitEntryId)

Add a DW_OP_deref_type or DW_OP_GNU_deref_type operation to the expression.

pub fn op_xderef_type(&mut self, size: u8, base: UnitEntryId)

Add a DW_OP_xderef_type operation to the expression.

pub fn op_plus_uconst(&mut self, value: u64)

Add a DW_OP_plus_uconst operation to the expression.

pub fn op_skip(&mut self) -> usize

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_bra(&mut self) -> usize

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 next_index(&self) -> usize

Return the index that will be assigned to the next operation.

This can be passed to set_target.

pub fn set_target(&mut self, operation: usize, new_target: usize)

Set the target of a DW_OP_skip or DW_OP_bra operation .

pub fn op_call(&mut self, entry: UnitEntryId)

Add a DW_OP_call4 operation to the expression.

pub fn op_call_ref(&mut self, entry: Reference)

Add a DW_OP_call_ref operation to the expression.

pub fn op_convert(&mut self, base: Option<UnitEntryId>)

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_reinterpret(&mut self, base: Option<UnitEntryId>)

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_entry_value(&mut self, expression: Expression)

Add a DW_OP_entry_value or DW_OP_GNU_entry_value operation to the expression.

pub fn op_reg(&mut self, register: Register)

Add a DW_OP_regx operation to the expression.

This may be emitted as a smaller equivalent operation.

pub fn op_implicit_value(&mut self, data: Box<[u8]>)

Add a DW_OP_implicit_value operation to the expression.

pub fn op_implicit_pointer(&mut self, entry: Reference, byte_offset: i64)

Add a DW_OP_implicit_pointer or DW_OP_GNU_implicit_pointer operation to the expression.

pub fn op_piece(&mut self, size_in_bytes: u64)

Add a DW_OP_piece operation to the expression.

pub fn op_bit_piece(&mut self, size_in_bits: u64, bit_offset: u64)

Add a DW_OP_bit_piece operation to the expression.

pub fn op_gnu_parameter_ref(&mut self, entry: UnitEntryId)

Add a DW_OP_GNU_parameter_ref operation to the expression.

pub fn op_wasm_local(&mut self, index: u32)

Add a DW_OP_WASM_location 0x0 operation to the expression.

pub fn op_wasm_global(&mut self, index: u32)

Add a DW_OP_WASM_location 0x1 operation to the expression.

pub fn op_wasm_stack(&mut self, index: u32)

Add a DW_OP_WASM_location 0x2 operation to the expression.

Trait Implementations

impl Clone for Expression

fn clone(&self) -> Expression

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for Expression

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for Expression

fn default() -> Expression

Returns the “default value” for a type.

impl Hash for Expression

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq for Expression

fn eq(&self, other: &Expression) -> bool

This method tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Eq for Expression

impl StructuralPartialEq for Expression