HP OpenVMS systems documentation

Appendix B
Appendix B	Unwind Descriptor Record Format
B.1	Region Header Records
B.1.1	Format R1
B.1.2	Format R2
B.1.3	Format R3
B.2	Descriptor Records for Prologue Regions
B.2.1	Format P1
B.2.2	Format P2
B.2.3	Format P3
B.2.4	Format P4
B.2.5	Format P5
B.2.6	Format P6
B.2.7	Format P7
B.2.8	Format P8
B.2.9	Format P9
B.2.10	Format P10
B.3	Descriptor Records for Body Regions
B.3.1	Format B1
B.3.2	Format B2
B.3.3	Format B3
B.3.4	Format B4
B.4	Descriptor Records for Body or Prologue Regions
B.4.1	Format X1
B.4.2	Format X2
B.4.3	Format X3
B.4.4	Format X4
Appendix C
Appendix C	Summary of Differences from the Intel Itanium Software Conventions
C.1	Changes
C.2	Extensions
Index
Index
Examples
3-1	Entry Code for a Stack Frame Procedure
3-2	Entry Code for a Register Frame Procedure
3-3	Exit Code Sequence for a Stack Frame
3-4	Exit Code Sequence for a Register Frame
5-1	Code for Examining the Procedure Value
Figures
2-1	Stack Frame Generated by CALLG or CALLS Instruction
2-2	Argument List Format
3-1	Stack Frame Procedure Descriptor (PDSC)
3-2	Fixed-Size Stack Frame Format
3-3	Variable-Size Stack Frame Format
3-4	Register Save Area (RSA) Layout
3-5	Register Save Area (RSA) Example
3-6	Register Frame Procedure Descriptor (PDSC)
3-7	Null Frame Procedure Descriptor (PDSC) Format
3-8	Procedure Invocation Handle Format
3-9	Invocation Context Block Format
3-10	Argument Information Register (R25) Format
3-11	Linkage Pair Block Format
3-12	Bound Procedure Descriptor (PDSC)
5-1	Alpha Signature Information Block (PSIG)
5-2	I64 Signature Information Block (PSIG)
6-1	Varying Character String Data Type (DSC$K_DTYPE_VT)---General Format
6-2	Varying Character String Data Type (DSC$K_DTYPE_VT) Format
7-1	Descriptor Prototype Format
7-2	Fixed-Length Descriptor Format
7-3	Dynamic String Descriptor Format
7-4	Array Descriptor Format
7-5	Procedure Argument Descriptor Format
7-6	Decimal String Descriptor Format
7-7	Noncontiguous Array Descriptor Format
7-8	Varying String Descriptor Format
7-9	Varying String Descriptor with Character String Data Type
7-10	Varying String Array Descriptor Format
7-11	Unaligned Bit String Descriptor Format
7-12	Unaligned Bit Array Descriptor Format
7-13	String with Bounds Descriptor Format
7-14	Unaligned Bit String with Bounds Descriptor Format
8-1	Format of a Condition Value
8-2	Interaction Between Handlers and Default Handlers
8-3	Signal Argument Vector --- 32-Bit Format
8-4	Signal Argument Vector --- 64-Bit Format
8-5	VAX Mechanism Vector Format
8-6	Alpha Mechanism Vector Format
8-7	I64 Mechanism Vector Format
A-1	Unwind Table and Unwind Information Block
A-2	OpenVMS Operating System-Specific Data Area Segment
A-3	Format of OSSD$T_SPILL_DATA
Tables
2-1	VAX Register Usage
2-2	Argument-Passing Mechanisms with User Explicit Control
3-1	Alpha Integer Register Usage
3-2	Alpha Floating-Point Register Usage
3-3	Contents of Stack Frame Procedure Descriptor (PDSC)
3-4	Contents of Register Frame Procedure Descriptor (PDSC)
3-5	Contents of Null Frame Procedure Descriptor (PDSC)
3-6	Contents of the Invocation Context Block
3-7	Contents of the Argument Information Register (R25)
3-8	Contents of the Linkage Pair Block
3-9	Contents of the Bound Procedure Descriptor (PDSC)
3-10	Argument Item Locations
3-11	Data Types and the Unused Bits in Passed Data
3-12	Natural Alignment Requirements
5-1	Signature Information Field Tag Values
5-2	Contents of the Signature Information Block (PSIG)
5-3	Register Argument Signature Encodings
5-4	Function Return Signature Encodings
5-5	Native-to-Translated Conversion of the PSIG Field Values
5-6	Translated-to-Native Conversion of the PSIG Field Values
6-1	Atomic Data Types
6-2	String Data Types
6-3	Miscellaneous Data Types
6-4	Reserved Data Types
7-1	Argument Descriptor Classes for OpenVMS Alpha and OpenVMS VAX
7-2	Contents of the Prototype Descriptor
7-3	Contents of the CLASS_S Descriptor
7-4	Contents of the CLASS_D Descriptor
7-5	Contents of the CLASS_A Descriptor
7-6	Contents of the CLASS_P Descriptor
7-7	Contents of the CLASS_SD Descriptor
7-8	Internal-to-External BINSCALE Conversion Examples
7-9	Contents of the CLASS_NCA Descriptor
7-10	Contents of the CLASS_VS Descriptor
7-11	Contents of the CLASS_VSA Descriptor
7-12	Contents of the CLASS_UBS Descriptor
7-13	Contents of the CLASS_UBA Descriptor
7-14	Contents of the CLASS_SB Descriptor
7-15	Contents of the CLASS_UBSB Descriptor
7-16	Specific OpenVMS VAX Descriptors Reserved to Hewlett-Packard
8-1	Contents of the Condition Value
8-2	Value Symbols for the Condition Value Longword
8-3	Interpretation of Severity Codes
8-4	Exception Codes and Symbols for the GENTRAP Parameter
8-5	Contents of the Alpha Argument Mechanism Array (MECH)
8-6	Contents of the I64 Argument Mechanism Array (MECH)
A-1	F (Flags) Field of the Information Block
A-2	Region Header Records
A-3	Prologue Descriptor Records for the Stack Frame
A-4	Prologue Descriptor Records for the Return Pointer
A-5	Prologue Descriptor Records for the Previous Function State
A-6	Prologue Descriptor Records for Predicate Registers
A-7	Prologue Descriptor Records for General, Floating-Point, and Branch Registers
A-8	Prologue Descriptor Records for the User NaT Collection Register
A-9	Prologue Descriptor Records for the Loop Counter Register
A-10	Prologue Descriptor Records for the Primary UNaT Collection
A-11	Prologue Descriptor Records for the Backing Store
A-12	Body Region Descriptor Records
A-13	General Unwind Descriptors
A-14	Operating System-Specific Data Area
A-15	OpenVMS OSSD Caller Spill Register Information
A-16	Description of OSSD$T_SPILL_DATA Segment
B-1	Record Formats
B-2	Example ULEB128 Encodings