Package ghidra.pcode.emu.jit

Class JitPassage.DecodeErrorPcodeOp

java.lang.Object

ghidra.program.model.pcode.PcodeOp

ghidra.pcode.emu.jit.JitPassage.DecodedPcodeOp

ghidra.pcode.emu.jit.JitPassage.DecodeErrorPcodeOp

Enclosing class:

JitPassage

public static class JitPassage.DecodeErrorPcodeOp
extends JitPassage.DecodedPcodeOp

A synthetic p-code op denoting a decode error

The decoder may encounter several decode errors as it selects and decodes the passage. An instruction is selected because the JIT believes it may be executed by the emulator. (Predicting this and making good selections is a matter of further research.) Encounting a decode error along a possible path is not cause to throw an exception. However; if the emulator does in fact attempt to execute the bytes which it can't decode, then we do throw the exception. This p-code op is synthesized where such decode errors occur, and the translator will generate code that actually throw the exception. Note that the error message is placed in the corresponding JitPassage.ErrBranch.

Field Summary

Fields inherited from class ghidra.program.model.pcode.PcodeOp

BOOL_AND, BOOL_NEGATE, BOOL_OR, BOOL_XOR, BRANCH, BRANCHIND, CALL, CALLIND, CALLOTHER, CAST, CBRANCH, COPY, CPOOLREF, EXTRACT, FLOAT_ABS, FLOAT_ADD, FLOAT_CEIL, FLOAT_DIV, FLOAT_EQUAL, FLOAT_FLOAT2FLOAT, FLOAT_FLOOR, FLOAT_INT2FLOAT, FLOAT_LESS, FLOAT_LESSEQUAL, FLOAT_MULT, FLOAT_NAN, FLOAT_NEG, FLOAT_NOTEQUAL, FLOAT_ROUND, FLOAT_SQRT, FLOAT_SUB, FLOAT_TRUNC, INDIRECT, INSERT, INT_2COMP, INT_ADD, INT_AND, INT_CARRY, INT_DIV, INT_EQUAL, INT_LEFT, INT_LESS, INT_LESSEQUAL, INT_MULT, INT_NEGATE, INT_NOTEQUAL, INT_OR, INT_REM, INT_RIGHT, INT_SBORROW, INT_SCARRY, INT_SDIV, INT_SEXT, INT_SLESS, INT_SLESSEQUAL, INT_SREM, INT_SRIGHT, INT_SUB, INT_XOR, INT_ZEXT, LOAD, LZCOUNT, MULTIEQUAL, NEW, PCODE_MAX, PIECE, POPCOUNT, PTRADD, PTRSUB, RETURN, SEGMENTOP, STORE, SUBPIECE, UNIMPLEMENTED

Constructor Summary

Constructors

Constructor	Description
DecodeErrorPcodeOp(JitPassage.AddrCtx at)	Construct a p-code op representing an instruction decode error.

Method Summary

Methods inherited from class ghidra.pcode.emu.jit.JitPassage.DecodedPcodeOp

getAt, getContext, getCounter, isInstructionStart

Methods inherited from class ghidra.program.model.pcode.PcodeOp

decode, encodeRaw, getBasicIter, getInput, getInputs, getInsertIter, getMnemonic, getMnemonic, getNumInputs, getOpcode, getOpcode, getOutput, getParent, getSeqnum, getSlot, hashCode, insertInput, isAssignment, isCommutative, isCommutative, isDead, removeInput, setInput, setOpcode, setOrder, setOutput, setTime, toString

Methods inherited from class java.lang.Object

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

Constructor Details

DecodeErrorPcodeOp

public DecodeErrorPcodeOp(JitPassage.AddrCtx at)

Construct a p-code op representing an instruction decode error.

Parameters:

at - the address and decode context where the error occurred