Package ghidra.pcode.emu.jit.gen.op

Enum Class LoadOpGen

java.lang.Object
java.lang.Enum<LoadOpGen>
ghidra.pcode.emu.jit.gen.op.LoadOpGen
All Implemented Interfaces:
OpGen<JitLoadOp>, Serializable, Comparable<LoadOpGen>, Constable, org.objectweb.asm.Opcodes
public enum LoadOpGen extends Enum<LoadOpGen> implements OpGen<JitLoadOp>
The generator for a load.

These ops are currently presumed to be indirect memory accesses. TODO: If we fold constants, we could convert some of these to direct.

We request a field to pre-fetch the space and emit code to load it onto the stack. We then emit code to load the offset onto the stack and convert it to a JVM long, if necessary. The varnode size is loaded by emitting an ldc, and finally we emit an invocation of JitBytesPcodeExecutorStatePiece.JitBytesPcodeExecutorStateSpace.read(long, int). The result is a byte array, so we finish by emitting the appropriate conversion and write the result to the output operand.

  • Nested Class Summary

    Nested classes/interfaces inherited from class java.lang.Enum

    Enum.EnumDesc<E extends Enum<E>>

  • Enum Constant Summary

    Enum Constants
    Enum Constant
    Description
    GEN
    The generator singleton

  • Field Summary

    Fields inherited from interface org.objectweb.asm.Opcodes

    AALOAD, AASTORE, ACC_ABSTRACT, ACC_ANNOTATION, ACC_BRIDGE, ACC_DEPRECATED, ACC_ENUM, ACC_FINAL, ACC_INTERFACE, ACC_MANDATED, ACC_MODULE, ACC_NATIVE, ACC_OPEN, ACC_PRIVATE, ACC_PROTECTED, ACC_PUBLIC, ACC_RECORD, ACC_STATIC, ACC_STATIC_PHASE, ACC_STRICT, ACC_SUPER, ACC_SYNCHRONIZED, ACC_SYNTHETIC, ACC_TRANSIENT, ACC_TRANSITIVE, ACC_VARARGS, ACC_VOLATILE, ACONST_NULL, ALOAD, ANEWARRAY, ARETURN, ARRAYLENGTH, ASM10_EXPERIMENTAL, ASM4, ASM5, ASM6, ASM7, ASM8, ASM9, ASTORE, ATHROW, BALOAD, BASTORE, BIPUSH, CALOAD, CASTORE, CHECKCAST, D2F, D2I, D2L, DADD, DALOAD, DASTORE, DCMPG, DCMPL, DCONST_0, DCONST_1, DDIV, DLOAD, DMUL, DNEG, DOUBLE, DREM, DRETURN, DSTORE, DSUB, DUP, DUP_X1, DUP_X2, DUP2, DUP2_X1, DUP2_X2, F_APPEND, F_CHOP, F_FULL, F_NEW, F_SAME, F_SAME1, F2D, F2I, F2L, FADD, FALOAD, FASTORE, FCMPG, FCMPL, FCONST_0, FCONST_1, FCONST_2, FDIV, FLOAD, FLOAT, FMUL, FNEG, FREM, FRETURN, FSTORE, FSUB, GETFIELD, GETSTATIC, GOTO, H_GETFIELD, H_GETSTATIC, H_INVOKEINTERFACE, H_INVOKESPECIAL, H_INVOKESTATIC, H_INVOKEVIRTUAL, H_NEWINVOKESPECIAL, H_PUTFIELD, H_PUTSTATIC, I2B, I2C, I2D, I2F, I2L, I2S, IADD, IALOAD, IAND, IASTORE, ICONST_0, ICONST_1, ICONST_2, ICONST_3, ICONST_4, ICONST_5, ICONST_M1, IDIV, IF_ACMPEQ, IF_ACMPNE, IF_ICMPEQ, IF_ICMPGE, IF_ICMPGT, IF_ICMPLE, IF_ICMPLT, IF_ICMPNE, IFEQ, IFGE, IFGT, IFLE, IFLT, IFNE, IFNONNULL, IFNULL, IINC, ILOAD, IMUL, INEG, INSTANCEOF, INTEGER, INVOKEDYNAMIC, INVOKEINTERFACE, INVOKESPECIAL, INVOKESTATIC, INVOKEVIRTUAL, IOR, IREM, IRETURN, ISHL, ISHR, ISTORE, ISUB, IUSHR, IXOR, JSR, L2D, L2F, L2I, LADD, LALOAD, LAND, LASTORE, LCMP, LCONST_0, LCONST_1, LDC, LDIV, LLOAD, LMUL, LNEG, LONG, LOOKUPSWITCH, LOR, LREM, LRETURN, LSHL, LSHR, LSTORE, LSUB, LUSHR, LXOR, MONITORENTER, MONITOREXIT, MULTIANEWARRAY, NEW, NEWARRAY, NOP, NULL, POP, POP2, PUTFIELD, PUTSTATIC, RET, RETURN, SALOAD, SASTORE, SIPUSH, SOURCE_DEPRECATED, SOURCE_MASK, SWAP, T_BOOLEAN, T_BYTE, T_CHAR, T_DOUBLE, T_FLOAT, T_INT, T_LONG, T_SHORT, TABLESWITCH, TOP, UNINITIALIZED_THIS, V_PREVIEW, V1_1, V1_2, V1_3, V1_4, V1_5, V1_6, V1_7, V1_8, V10, V11, V12, V13, V14, V15, V16, V17, V18, V19, V20, V21, V22, V23, V24, V9

  • Method Summary

    Modifier and Type
    Method
    Description
    void
    generateInitCode(JitCodeGenerator gen, JitLoadOp op, org.objectweb.asm.MethodVisitor iv)
    Emit bytecode into the class constructor.
    void
    generateRunCode(JitCodeGenerator gen, JitLoadOp op, JitControlFlowModel.JitBlock block, org.objectweb.asm.MethodVisitor rv)
    Emit bytecode into the run method.
    static LoadOpGen
    valueOf(String name)
    Returns the enum constant of this class with the specified name.
    static LoadOpGen[]
    values()
    Returns an array containing the constants of this enum class, in the order they are declared.

    Methods inherited from class java.lang.Enum

    clone, compareTo, describeConstable, equals, finalize, getDeclaringClass, hashCode, name, ordinal, toString, valueOf

    Methods inherited from class java.lang.Object

    getClass, notify, notifyAll, wait, wait, wait

  • Enum Constant Details

    • GEN

      public static final LoadOpGen GEN
      The generator singleton

  • Method Details

    • values

      public static LoadOpGen[] values()
      Returns an array containing the constants of this enum class, in the order they are declared.
      Returns:
      an array containing the constants of this enum class, in the order they are declared

    • valueOf

      public static LoadOpGen valueOf(String name)
      Returns the enum constant of this class with the specified name. The string must match exactly an identifier used to declare an enum constant in this class. (Extraneous whitespace characters are not permitted.)
      Parameters:
      name - the name of the enum constant to be returned.
      Returns:
      the enum constant with the specified name
      Throws:
      IllegalArgumentException - if this enum class has no constant with the specified name
      NullPointerException - if the argument is null

    • generateInitCode

      public void generateInitCode(JitCodeGenerator gen, JitLoadOp op, org.objectweb.asm.MethodVisitor iv)
      Description copied from interface: OpGen
      Emit bytecode into the class constructor.
      Specified by:
      generateInitCode in interface OpGen<JitLoadOp>
      Parameters:
      gen - the code generator
      op - the p-code op (use-def node) to translate
      iv - the visitor for the class constructor

    • generateRunCode

      public void generateRunCode(JitCodeGenerator gen, JitLoadOp op, JitControlFlowModel.JitBlock block, org.objectweb.asm.MethodVisitor rv)
      Description copied from interface: OpGen
      Emit bytecode into the run method.

      This method must emit the code needed to load any input operands, convert them to the appropriate type, perform the actual operation, and then if applicable, store the output operand. The implementations should delegate to JitCodeGenerator.generateValReadCode(JitVal, JitTypeBehavior), JitCodeGenerator.generateVarWriteCode(JitVar, JitType), and TypeConversions appropriately.

      Specified by:
      generateRunCode in interface OpGen<JitLoadOp>
      Parameters:
      gen - the code generator
      op - the p-code op (use-def node) to translate
      block - the basic block containing the p-code op
      rv - the visitor for the run method.