Class OperandValueSolver
- java.lang.Object
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- ghidra.app.plugin.assembler.sleigh.expr.AbstractExpressionSolver<OperandValue>
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- ghidra.app.plugin.assembler.sleigh.expr.OperandValueSolver
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public class OperandValueSolver extends AbstractExpressionSolver<OperandValue>
Solves expressions of an operand value These are a sort of named sub-expression, but they may also specify a shift in encoding.
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Field Summary
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Fields inherited from class ghidra.app.plugin.assembler.sleigh.expr.AbstractExpressionSolver
dbg, solver
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Constructor Summary
Constructors Constructor Description OperandValueSolver()
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description protected PatternExpression
getDefiningExpression(OperandSymbol sym)
Obtains the "defining expression" This is either the symbols assigned defining expression, or the expression associated with its defining symbol.int
getInstructionLength(OperandValue ov, java.util.Map<java.lang.Integer,java.lang.Object> res)
Determines the length of the subconstructor that would be returned had the expression not depended on an undefined symbol.MaskedLong
getValue(OperandValue ov, java.util.Map<java.lang.String,java.lang.Long> vals, java.util.Map<java.lang.Integer,java.lang.Object> res, AssemblyResolvedConstructor cur)
Attempt to get a constant value for the expressionAssemblyResolution
solve(OperandValue ov, MaskedLong goal, java.util.Map<java.lang.String,java.lang.Long> vals, java.util.Map<java.lang.Integer,java.lang.Object> res, AssemblyResolvedConstructor cur, java.util.Set<SolverHint> hints, java.lang.String description)
Attempt to solve an expression for a given valueMaskedLong
valueForResolution(OperandValue ov, AssemblyResolvedConstructor rc)
Compute the value of the expression given the (possibly-intermediate) resolution-
Methods inherited from class ghidra.app.plugin.assembler.sleigh.expr.AbstractExpressionSolver
register
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Method Detail
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getDefiningExpression
protected PatternExpression getDefiningExpression(OperandSymbol sym)
Obtains the "defining expression" This is either the symbols assigned defining expression, or the expression associated with its defining symbol.- Returns:
- the defining expression, or null if neither is available
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solve
public AssemblyResolution solve(OperandValue ov, MaskedLong goal, java.util.Map<java.lang.String,java.lang.Long> vals, java.util.Map<java.lang.Integer,java.lang.Object> res, AssemblyResolvedConstructor cur, java.util.Set<SolverHint> hints, java.lang.String description) throws NeedsBackfillException
Description copied from class:AbstractExpressionSolver
Attempt to solve an expression for a given value- Specified by:
solve
in classAbstractExpressionSolver<OperandValue>
- Parameters:
ov
- the expression to solvegoal
- the desired value of the expressionvals
- values of defined symbolsres
- the results of subconstructor resolutions (used for lengths)hints
- describes techniques applied by calling solversdescription
- the description to give to resolved solutions- Returns:
- the resolution
- Throws:
NeedsBackfillException
- if the expression refers to an undefined symbol
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getValue
public MaskedLong getValue(OperandValue ov, java.util.Map<java.lang.String,java.lang.Long> vals, java.util.Map<java.lang.Integer,java.lang.Object> res, AssemblyResolvedConstructor cur) throws NeedsBackfillException
Description copied from class:AbstractExpressionSolver
Attempt to get a constant value for the expression- Specified by:
getValue
in classAbstractExpressionSolver<OperandValue>
- Parameters:
ov
- the expressionvals
- values of defined symbolsres
- the results of subconstructor resolutions (used for lengths)- Returns:
- the constant value, or null if it depends on a variable
- Throws:
NeedsBackfillException
- if the expression refers to an undefined symbol
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getInstructionLength
public int getInstructionLength(OperandValue ov, java.util.Map<java.lang.Integer,java.lang.Object> res)
Description copied from class:AbstractExpressionSolver
Determines the length of the subconstructor that would be returned had the expression not depended on an undefined symbol. This is used by the backfilling process to ensure values are written to the correct offset- Specified by:
getInstructionLength
in classAbstractExpressionSolver<OperandValue>
- Parameters:
ov
- the expressionres
- the results of subconstructor resolutions (used for lengths)- Returns:
- the length of filled in token field(s).
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valueForResolution
public MaskedLong valueForResolution(OperandValue ov, AssemblyResolvedConstructor rc)
Description copied from class:AbstractExpressionSolver
Compute the value of the expression given the (possibly-intermediate) resolution- Specified by:
valueForResolution
in classAbstractExpressionSolver<OperandValue>
- Parameters:
ov
- the expression to evaluaterc
- the resolution on which to evaluate it- Returns:
- the result
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