| Op Code (Hex) | Operand 1 | Operand 2 | Operand 3 | |
|---|---|---|---|---|
| 0293 | Internal entry point | Argument list | Return target |
Operand 2: Operand list or null.
Operand 3: Instruction pointer.
Warning: The following information is subject to change from release to release. Use it with caution and be prepared to adjust for changes with each new release.
Description: The internal entry point specified by operand 1 is located in the same invocation from which the Call Internal instruction is executed. A subinvocation is defined and execution control is transferred to the first instruction associated with the internal entry point. The instruction does not cause a new invocation to be established. Therefore, there is no allocation of objects and instructions in the subinvocation have access to all invocation objects.
Operand 2 specifies an operand list that identifies the arguments to be passed to the subinvocation. If operand 2 is null, no arguments are passed. After an argument has been passed on a Call Internal instruction, the corresponding parameter may be referenced. This causes an indirect reference to the storage area located by the argument. This mapping exists until the parameter is assigned a new mapping based on a subsequent Call Internal instruction. A reference to an internal parameter before its being assigned an argument mapping causes a parameter reference violation (hex 0801) exception to be signaled.
Operand 3 specifies an instruction pointer that identifies the pointer into which the machine places addressability to the instruction immediately following the Call Internal instruction. A branch instruction in the called subinvocation can directly reference this instruction pointer to cause control to be passed back to the instruction immediately following the Call Internal instruction.
06 Addressing
08 Argument/Parameter
10 Damage Encountered
1C Machine-Dependent
20 Machine Support
22 Object Access
24 Pointer Specification
2E Resource Control Limit
36 Space Management
44 Protection Violation