Class ContextFieldSolver
java.lang.Object
ghidra.app.plugin.assembler.sleigh.expr.AbstractExpressionSolver<ContextField>
ghidra.app.plugin.assembler.sleigh.expr.ContextFieldSolver
Solves expressions of a context register field
Essentially, this just encodes the goal into the field, if it can be represented in the given space and format. Otherwise, there is no solution.
-
Field Summary
Fields inherited from class ghidra.app.plugin.assembler.sleigh.expr.AbstractExpressionSolver
dbg, solver
-
Constructor Summary
-
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
(ContextField cf, Map<String, Long> vals, AssemblyResolvedPatterns cur) Attempt to get a constant value for the expressionsolve
(AbstractAssemblyResolutionFactory<?, ?> factory, ContextField cf, MaskedLong goal, Map<String, Long> vals, AssemblyResolvedPatterns cur, Set<SolverHint> hints, String description) Attempt to solve an expression for a given valuevalueForResolution
(ContextField cf, 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
-
Constructor Details
-
ContextFieldSolver
public ContextFieldSolver()
-
-
Method Details
-
solve
public AssemblyResolution solve(AbstractAssemblyResolutionFactory<?, ?> factory, ContextField cf, 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<ContextField>
- Parameters:
cf
- 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
-
getValue
Description copied from class:AbstractExpressionSolver
Attempt to get a constant value for the expression- Specified by:
getValue
in classAbstractExpressionSolver<ContextField>
- Parameters:
cf
- the expressionvals
- values of defined symbols- Returns:
- the constant value, or null if it depends on a variable
-
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<ContextField>
- Parameters:
cf
- the expression- Returns:
- the length of filled in token field(s).
-
valueForResolution
public MaskedLong valueForResolution(ContextField cf, 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<ContextField>
- Parameters:
cf
- the expression to evaluatevals
- values of defined symbolsrc
- the resolution on which to evaluate it- Returns:
- the result
-