Package ghidra.app.util.bin.format.golang.rtti

Class GoPcValueEvaluator

java.lang.Object
ghidra.app.util.bin.format.golang.rtti.GoPcValueEvaluator
public class GoPcValueEvaluator extends Object
Evaluates a sequence of (value_delta,pc_delta) leb128 pairs to calculate a value for a certain PC location.

  • Constructor Summary

    Constructors
    Constructor
    Description
    GoPcValueEvaluator(GoFuncData func, long offset)
    Creates a GoPcValueEvaluator instance, tied to the specified GoFuncData, starting at the specified offset in the moduledata's pctab.

  • Method Summary

    Modifier and Type
    Method
    Description
    int
    eval(long targetPC)
    Returns the value encoded into the table at the specified pc.
    List<Integer>
    evalAll(long targetPC)
    Returns the set of all values for each unique pc section.
    long
    getMaxPC()
    Returns the largest PC value calculated when evaluating the result of the table's sequence.

    Methods inherited from class java.lang.Object

    clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

  • Constructor Details

    • GoPcValueEvaluator

      public GoPcValueEvaluator(GoFuncData func, long offset) throws IOException
      Creates a GoPcValueEvaluator instance, tied to the specified GoFuncData, starting at the specified offset in the moduledata's pctab.
      Parameters:
      func - GoFuncData
      offset - offset in moduledata's pctab
      Throws:
      IOException - if error reading pctab

  • Method Details

    • getMaxPC

      public long getMaxPC() throws IOException
      Returns the largest PC value calculated when evaluating the result of the table's sequence.
      Returns:
      largest PC value encountered
      Throws:
      IOException - if error evaluating result

    • eval

      public int eval(long targetPC) throws IOException
      Returns the value encoded into the table at the specified pc.
      Parameters:
      targetPC - pc
      Returns:
      value at specified pc, or -1 if error evaluating table
      Throws:
      IOException - if error reading data

    • evalAll

      public List<Integer> evalAll(long targetPC) throws IOException
      Returns the set of all values for each unique pc section.
      Parameters:
      targetPC - max pc to advance the sequence to when evaluating the table
      Returns:
      list of integer values
      Throws:
      IOException - if error reading data