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BMC

BMC Mainframe: Advanced Assembler and Macro Usage

The course is developed and delivered by © RSM Technology.

This four-day course is designed to build on the skills taught in RSM's definitive Using z/OS Assembler course. It starts with a short review of the basic Assembler instructions before introducing a number of more advanced subjects, such as general addressability, 31-bits and 64-bits addressing, re-entrancy, macro usage, debugging and recovery.

The course also covers the Assembler macro language fundamentals and z/OS Control Block usage

- all essential knowledge required for maintaining and writing z/OS exits.

Major release:

BMC Mainframe Infrastructure Platform Training

Recommended Prerequisites:

Good for:

Administrators

Course Delivery:

Instructor Led | 32 時間

Course Modules

  • Addressability
    • Control Sections - CSECTS
    • CSECT addressability - methods and examples
    • DROP directive
    • CSECTS in excess of 4K
    • Multiple Base Registers
    • Reference by explicit address
    • Reference by Dummy Section
    • DSECT mapping and external storage
    • MVS control block DSECTs
    • Explicit reference and internal control blocks
    • DSECT reference and internal control blocks
    • DSECT reference and external control blocks
  • I/O and Data Management
    • Sequential files:
      • Fixed Length Records, Variable Length Record
      • Data Control Block (DCB)
      • QSAM DCB
      • OPEN macro
      • CLOSE macro
      • Using the GET macro in Move mode
      • Using the PUT macro in Move mode
      • Using the GET macro in Locate mode
      • Using the PUT macro in Locate mode
      • Execute
  • Intermodule Communication
    • Static Load Module structure and the VCON
    • Static Load Module linkage - 'CALL' macro
    • Secondary entry points
    • Establishing addressability for secondary entry points
    • External references using EXTRN
    • Save Area conventions
    • Standard Module linkage
    • SAVE and RETURN macros
    • Parameter passing standard convention
    • PARM keyword on JCL EXEC statement
    • Parameter passing using Explicit Interface
    • CALL macro:
      • Explicit Parameter Interface
      • Implicit Parameter Interface
      • Implicit Variable Parameter Interface
      • Return code setting
      • Return code testing
      • Manipulating the Linkage Stack with BAKR and PR
      • Status saving using the Linkage Stack
  • Extended Addressability
    • Virtual Storage
    • Establishing AMODE and RMODE values
    • AMODE and RMODE combination rules
    • Addressing mode sensitivity
    • Mode setting instructions - BASSM and BSM
    • Calling and returning using BASSM and BSM (Basic Mode)
    • Mode switching to retrieve data from above 16 MB
    • Using pointer-defined linkage
    • BASSM & BSM in 64-bit mode
    • Using linkage assist routines
    • Using capping to assist linkage to 24-bit program
    • Using capping to assist linkage to 31-bit program
  • Binder (Linkage editor)
    • Binder overview
    • Resolving external references
    • Object and LOAD module records
    • External Symbol Dictionary
    • ReLocation Dictionary
    • Automatic library call feature
    • Weak external reference
    • Binder JCL
    • Binder module attribute options
    • Binder module processing and output options
    • Binder control statements
    • Binder codes
    • AMBLIST utility
  • Debugging
    • Problem program dump facilities
    • ABEND
    • SNAP
    • ABEND dump files
    • ABEND dump default contents
    • Summary dump
    • Symptom dump
    • ABEND macro
    • Parameter descriptions
    • SNAP macro
    • SNAP SDATA options
    • SNAP PDATA options
    • Save Area traces
    • Save Area trace and linkage stack entry
  • System Services
    • Event synchronization
    • WAIT macro
    • POST macro
    • Write to log macro (WTL)
    • Write to operator macro (WTO)
    • Write to operator with reply macro (WTOR)
    • Delete operator message macro (DOM)
    • TIME macro
    • STIMER macro
    • TTIMER macro
    • CPUTIMER macro
  • Recovery
    • Recovery flow
    • ESTAE macro
    • System Diagnostic Work Area (SDWA)
    • Recovery routine processing
    • SETRP macro
    • Retry options
    • Lab exercise (write an ESTAE recovery routine)
  • Advanced Instructions
    • Move long (MVCL)
    • Compare logical long (CLCL)
    • Translate (TR)
    • Translate & test (TRT)
    • Edit (ED)
    • Edit & mark (EDMK)
  • Macro Language Fundamentals
    • Macro language introduction
    • Macro language feature
    • Defining a macro - basic rules
    • Passing positional parameters
    • Passing keyword parameters
    • Parameter and keyword sub lists
    • Common system variables
    • Testing how a field was defined
    • Lab exercise
  • Re-entrant & Re-usable Code
    • Re-entrant and re-usable code - objectives
    • Re-usable code (REUS)
    • Re-entrant code (RENT) - the rules
    • RENT - how do you do it?
    • Re-entrant code example
    • List and Execute forms of macros
    • Getting the re-entrant benefit
    • Refreshable
    • Lab exercise (make a routine re-entrant)