Migrating an Application from OpenVMS VAX to OpenVMS Alpha

• /NATIVE_ONLY qualifier #1
• /NATIVE_ONLY qualifier #2
  • interoperability
• Natural alignment of data
  • See data alignment
• Network interfaces
  • supported on Alpha
• Nonstandard calls
  • writing jacket routines for

• OpenVMS Alpha operating system
  • compatibility goals of
  • diagnostic features
• OpenVMS Mathematics Run-Time Library
  • compatibility
• Optimization
  • in relation to program structure
• /OPTIMIZE qualifier
  • in programs
• Optimized code
• Optimizing compilers
• Order information
  • migration services
• OTS$CALL_PROC RTL routine
  • enabling callbacks to translated images
• Output files
  • displaying
  • formatting
• Overflow detection
  • enabling

• Packed decimal data type #1
• Packed decimal data type #2
• Page sizes #1
• Page sizes #2
• Page sizes #3
  • compatibility with OpenVMS VAX
  • dependencies on VAX page size
  • memory protection granularity
  • permissive protection #1
  • permissive protection #2
  • supported by Alpha systems
  • using $GETSYI to obtain the page size at run time
• Pagelets
  • definition
  • using with $EXPREG system service
• PALcode (privileged architecture library)
• Parallel execution of instructions
• Parallel Processing Run-Time Library (PPL$) routines
• PCA (Performance and Coverage Analyzer)
  • analyzing images
  • detecting unaligned data #1
  • detecting unaligned data #2
  • identifying critical images
• pcc
  • supported as DEC C compatibility mode
• PCs (Program counters) #1
• PCs (Program counters) #2
  • in signal array on Alpha systems
  • modifying
• PDP-11 compatibility mode
• Performance
  • of translated images #1
  • of translated images #2
• Performance and Coverage Analyzer
  • See PCA
• Performance monitors
  • non-Digital
• Permissive protection
• Planning a migration #1
• Planning a migration #2
• Portability
  • See Compatibility
• #PRAGMA NO_MEMBER_ALIGNMENT
• Precise exception reporting #1
• Precise exception reporting #2
• Precise exception reporting #3
• /PRESERVE=FLOAT_EXCEPTIONS
  • translation qualifier needed for TIE condition handler
• Primary key
  • change to, on OpenVMS Alpha
• Privileged architecture library
  • See PALcode
• Privileged code
  • finding with VEST
  • migrating to OpenVMS Alpha
• Privileged mode operation
• Privileged shareable images
• Privileged VAX instructions
• Procedure arguments
  • accessing
• Procedure signature blocks
  • See PSBs
• Process space
  • used by translated image
• Processor modes
  • unchanged on Alpha
• Processor status longword (PSL)
• Processor status longwords
  • See PSLs
• Program conversion
  • using the /STANDARD=OPENVMS_AXP qualifier option
• Program counters
  • See PCs
• Program listing files
  • separate compilation
• Program listings
  • See compiler listing files
• Program structure differences
  • debugging a DEC COBOL program
  • DEC COBOL (ex.)
  • using the /OPTIMIZE qualifier
  • VAX COBOL
• Programming languages
  • Ada
  • BASIC
  • C
  • C++
  • C
    • include files
    • VOLATILE declaration
  • COBOL
  • FORTRAN
  • LISP
  • Pascal
  • PL/I
  • See also specific languages; Compilers
  • VAX MACRO
• Protection
  • permissive
• PSBs (procedure signature blocks)
  • generating
• Pseudocode placeholders
  • unsupported by DEC COBOL
• PSLs (Processor status longwords)
  • in signal array on Alpha systems
• $PURGWS system service
  • page-size dependencies

• Quadword granularity
• "variant_struct"
  • impact of SYS$STARLET_C.TLB
• "variant_union"
  • impact of SYS$STARLET_C.TLB

• Rdb/VMS
  • same function on Alpha
• Read/write operations
  • ordering of #1
  • ordering of #2
• Read/write ordering
  • effect on synchronization
• Recompiling
  • changes in compile commands
  • comparison with translating #1
  • comparison with translating #2
  • effect of architectural dependencies
  • produces native Alpha image
  • resolving errors
  • restrictions
  • to create native Alpha images
• Record Management Services
  • See RMS
• Relinking
  • changes in link commands
  • to create native Alpha images
• REMQUEx instruction
  • accessing from DEC C
• REPLACE statement
  • differences
    • DEC COBOL on OpenVMS Alpha
    • DEC COBOL on OpenVMS Alpha (ex.)
    • line numbers
      • DEC COBOL on OpenVMS Alpha (ex.)
      • VAX COBOL (ex.)
• line numbers in compiler listing files
• VAX COBOL
• VAX COBOL (ex.)

Running translated images

• defining logical names for translated libraries

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S

• Screen formatting
• Selecting a migration method #1
• Selecting a migration method #2
• Self-modifying code
• /SEPARATE_COMPILATION qualifier
  • and program listings
• $SETAST system service
• $SETPRT system service
  • page-size dependencies
• $SETUAI system service
  • page-size dependencies
• Shareable image
  • calling
    • differences
• Shareable images
  • identifying
  • linker options file changes required
  • privileged
  • replacing a translated image with a native image
  • translated
• Shared data
  • atomicity of
  • unintentional sharing
• SIFs (Symbol information files) #1
• SIFs (Symbol information files) #2
• Signal array
  • format
  • reliance on architectural details of
• Sliced images
• $SNDJBC system service
  • page-size dependencies
• Software migration tools
• SS$_ALIGN exception
  • signal array format
• SS$_HPARITH exception
  • signal array format
• SS$_INVARG exception
  • mapping memory
  • returned when mapping memory
• Stack
  • modifying return addresses on
• Stack switching
• /STANDARD=OPENVMS_AXP qualifier option
  • default
• /STANDARD qualifier
  • DEC COBOL support for
• Storage differences
  • for double-precision data
• Storage issues
  • based on architectural differences
• Storage of double-precision data
  • Alpha architecture
    • more information
• Store conditional instruction (STxC)
• Storing return values
  • Alpha architecture
  • VAX architecture
• String constants
  • modifying
• Stub images
  • creating
• Support for migration
• Switching stacks
• Symbol information files
  • See SIFs
• Symbol vectors
  • controlling the layout of
  • declaring universal symbols on Alpha systems
• Symbols
  • redefining
    • DEC C incompatibility with VAX C
• SYMBOL_VECTOR= option
  • interoperability considerations
• Synchronization
  • and VEST
  • explicit
  • instructions
  • latent problems
  • of interprocess communication
  • using flag-passing protocols
  • using system services
• SYS$LIBRARY:LIB
  • compiling against
• SYS$STARLET_C.TLB
  • adherence to conventions
  • functional equivalency to STARLETSD.TLB
  • impact on use of "variant_struct" and "variant_union"
  • potential impact on LIB structures
  • potential impact on RMS structures
  • providing .H files
• SYS.STB
  • linking against #1
  • linking against #2
• SYS$UNWIND routine
• SYSGEN (System Generation utility)
  • See System Generation utility
• SYSMAN (System Management utility)
  • See System Management utility
• System-Code Debugger
  • OpenVMS Alpha
  • See also Debugger
• System Dump Analyzer utility (SDA)
  • OpenVMS Alpha
• System dump files
  • analyzing
• System Generation utility (SYSGEN)
  • device configuration functions
• System library
  • compiling against
• System Management utility (SYSMAN)
  • device configuration functions
• System Migration Detailed Analysis Service
• System Migration Service
• System return codes, differences
  • with illegal coding
• System services
  • asynchronous
  • calling interface unchanged
  • $CMEXEC
  • $CMKRNL
  • $CRETVA
  • $CRMPSC #1
  • $CRMPSC #2
  • $CRMPSC #3
  • $CRMPSC #4
  • $DELTVA
  • $DEQ #1
  • $DEQ #2
  • different operation on Alpha
  • $ENQ #1
  • $ENQ #2
  • $GETSYI
  • $LCKPAG
  • $LKWSET
  • memory management
  • memory management functions
    • page-size dependencies
  • $MGBLSC #1
  • $MGBLSC #2
  • protection problems created
  • replacing VAX MACRO code
  • $SETAST
  • undocumented
  • $UPDSEC
  • user-written
• System space
  • reference to addresses in #1
  • reference to addresses in #2
  • reference to addresses in #3
• System symbol table (SYS.STB)
  • linking against
• Systemwide logical names

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  6459PI02.HTM
  OSSG Documentation
  22-NOV-1996 13:07:31.84

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