Documentation

Exit Recovery Routine

The exit program can supply the address of a recovery routine via a parameter returned at the INIT exit point. The exit facility calls this routine in the event of an ABEND in the exit program. The recovery routine is called in the same mode as the ABENDing exit program, and is passed the System Diagnostic Work Area (SDWA) address and the EWA address (if any). Since the exit's recovery routine is called after the system's Recovery and Termination Manager (RTM) has finished processing the ABEND, it should perform only local clean-up functions. Any updates to the SDWA are ignored. The recovery routine should not attempt to free the SDWA, since this will be done by the exit facility.

Recovery Exit

Exit Point: When an ABEND has occurred in an exit program.

Function: Perform clean-up associated with the exit program.

Dispatchable Unit: Identical with the ABENDing exit program.

Register contents are shown in the following table.

Table 5

Recovery Exit Register Contents

 

 

Register

Contents on Entry

 

 

R00

SDWA (if processing under an SRB, a copy of the SDWA)

 

 

R01

Exit Work Area address (if applicable)

 

 

R02-R12

Zeros

 

 

R13

Save area address

 

 

R14

Return address

 

 

R15

Entry point address

 

 

On return from the recovery exit, R13 must be restored.

Exit Parameter List Mapping Macro - T00DEXPL

A new macro, T00DEXPL, is supplied to map the parameter lists to the exit program at the various exit points. The macro is distributed in the SAMP library.

12Cisco IOS for S/390 Release 2.0 Release Notes

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Cisco Systems S/390 manual Exit Recovery Routine, Recovery Exit, Exit Parameter List Mapping Macro T00DEXPL
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S/390 specifications

Cisco Systems S/390, also known as IBM's S/390 architecture, is a revolutionary mainframe computing solution that has significantly impacted enterprise computing since its introduction. Though primarily associated with IBM, its integration with Cisco Systems technologies has fostered enhanced networking capabilities, creating a robust platform for organizations to leverage.

One of the most notable features of the S/390 architecture is its scalability. The system is designed to manage workloads efficiently, enabling organizations to scale their operations seamlessly as their requirements grow. This architecture supports an extensive range of applications, from transaction processing to complex data analysis, making it suitable for diverse industries.

The S/390 systems are known for their reliability and resilience. With advanced error detection and correction mechanisms, the architecture minimizes downtime, ensuring that mission-critical applications remain operational. The mainframe's design accommodates redundancy and fault tolerance, reinforcing its reputation as a dependable computing solution.

Moreover, security is a core characteristic of the S/390 infrastructure. It incorporates various security features, such as encryption and robust access control mechanisms, to safeguard sensitive data against unauthorized access and cyber threats. This level of security is particularly critical for industries such as finance, healthcare, and government, where data protection is paramount.

The integration of Cisco networking technologies with the S/390 architecture brings enhanced connectivity and streamlined communication capabilities. Cisco’s advanced routing, switching, and security solutions bolster the mainframe's communication prowess, enabling organizations to create seamless, high-performance networks. This ensures that data flows efficiently between the mainframe and other networked devices.

Additionally, S/390 supports an array of middleware solutions, facilitating better interoperability with modern applications and cloud services. Organizations can take advantage of this flexibility to leverage existing investments in technology while embracing innovative solutions.

In summary, Cisco Systems S/390 embodies a potent combination of scalability, reliability, security, and advanced networking features. Its architecture serves as a cornerstone for enterprise computing, allowing organizations to meet their evolving business needs while maintaining high-performance standards. As businesses increasingly rely on data-driven decision-making, S/390 remains a critical asset for organizations striving for efficiency and innovation in their operations.
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