Class ConstantValueSolver
java.lang.Object
ghidra.app.plugin.assembler.sleigh.expr.AbstractExpressionSolver<ConstantValue>
ghidra.app.plugin.assembler.sleigh.expr.ConstantValueSolver
"Solves" constant expressions
Essentially, this either evaluates successfully when asked for a constant value, or checks that the goal is equal to the constant. Otherwise, there is no solution.
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Field Summary
Fields inherited from class ghidra.app.plugin.assembler.sleigh.expr.AbstractExpressionSolver
dbg, solver
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Constructor Summary
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Method Summary
Modifier and TypeMethodDescriptionint
Determines the length of the subconstructor that would be returned had the expression not depended on an undefined symbol.getValue
(ConstantValue cv, Map<String, Long> vals, AssemblyResolvedPatterns cur) Attempt to get a constant value for the expressionsolve
(AbstractAssemblyResolutionFactory<?, ?> factory, ConstantValue cv, MaskedLong goal, Map<String, Long> vals, AssemblyResolvedPatterns cur, Set<SolverHint> hints, String description) Attempt to solve an expression for a given valuevalueForResolution
(ConstantValue cv, Map<String, Long> vals, AssemblyResolvedPatterns rc) Compute the value of the expression given the (possibly-intermediate) resolutionMethods inherited from class ghidra.app.plugin.assembler.sleigh.expr.AbstractExpressionSolver
register
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Constructor Details
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ConstantValueSolver
public ConstantValueSolver()
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Method Details
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solve
public AssemblyResolution solve(AbstractAssemblyResolutionFactory<?, ?> factory, ConstantValue cv, MaskedLong goal, Map<String, Long> vals, AssemblyResolvedPatterns cur, Set<SolverHint> hints, String description) Description copied from class:AbstractExpressionSolver
Attempt to solve an expression for a given value- Specified by:
solve
in classAbstractExpressionSolver<ConstantValue>
- Parameters:
cv
- the expression to solvegoal
- the desired value of the expressionvals
- values of defined symbolshints
- describes techniques applied by calling solversdescription
- the description to give to resolved solutions- Returns:
- the resolution
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getValue
Description copied from class:AbstractExpressionSolver
Attempt to get a constant value for the expression- Specified by:
getValue
in classAbstractExpressionSolver<ConstantValue>
- Parameters:
cv
- the expressionvals
- values of defined symbols- Returns:
- the constant value, or null if it depends on a variable
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getInstructionLength
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<ConstantValue>
- Parameters:
cv
- the expression- Returns:
- the length of filled in token field(s).
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valueForResolution
public MaskedLong valueForResolution(ConstantValue cv, Map<String, Long> vals, AssemblyResolvedPatterns rc) Description copied from class:AbstractExpressionSolver
Compute the value of the expression given the (possibly-intermediate) resolution- Specified by:
valueForResolution
in classAbstractExpressionSolver<ConstantValue>
- Parameters:
cv
- the expression to evaluatevals
- values of defined symbolsrc
- the resolution on which to evaluate it- Returns:
- the result
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