Class ConstantValueSolver
- java.lang.Object
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- ghidra.app.plugin.assembler.sleigh.expr.AbstractExpressionSolver<ConstantValue>
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- ghidra.app.plugin.assembler.sleigh.expr.ConstantValueSolver
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public class ConstantValueSolver extends AbstractExpressionSolver<ConstantValue>
"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
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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 ConstantValueSolver()
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description int
getInstructionLength(ConstantValue cv, 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(ConstantValue cv, 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(ConstantValue cv, 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(ConstantValue cv, 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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solve
public AssemblyResolution solve(ConstantValue cv, 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)
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 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
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getValue
public MaskedLong getValue(ConstantValue cv, java.util.Map<java.lang.String,java.lang.Long> vals, java.util.Map<java.lang.Integer,java.lang.Object> res, AssemblyResolvedConstructor cur)
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 symbolsres
- the results of subconstructor resolutions (used for lengths)- Returns:
- the constant value, or null if it depends on a variable
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getInstructionLength
public int getInstructionLength(ConstantValue cv, 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<ConstantValue>
- Parameters:
cv
- 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(ConstantValue cv, AssemblyResolvedConstructor 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 evaluaterc
- the resolution on which to evaluate it- Returns:
- the result
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