HP OpenVMS Systems Documentation

HP OpenVMS Programming Concepts Manual Previous Contents Index Chapter 18 18 Basic Calling Standard Conventions      18.1     Hardware Registers          18.1.1         Register Usage for OpenVMS VAX          18.1.2         Register Usage for OpenVMS Alpha              18.1.2.1             Integer Registers              18.1.2.2             Floating-Point Registers          18.1.3         Register Usage for OpenVMS I64              18.1.3.1             Partitioning              18.1.3.2             I64 General Register Usage              18.1.3.3             I64 Floating-Point Register Usage              18.1.3.4             I64 Predicate Register Usage              18.1.3.5             I64 Branch Register Usage      18.2     Stack Usage for Procedures          18.2.1         Stack Procedure Usage for VAX              18.2.1.1             Calling Sequence              18.2.1.2             Call Frames on Return          18.2.2         Stack Procedure Usage for Alpha              18.2.2.1             Fixed-Size Stack Frame              18.2.2.2             Variable-Size Stack Frame          18.2.3         Stack Procedure Usage for I64              18.2.3.1             Procedure Types              18.2.3.2             Memory Stack              18.2.3.3             Procedure Frames              18.2.3.4             Register Stack                  18.2.3.4.1                 Input and Local Registers                  18.2.3.4.2                 Output Registers                  18.2.3.4.3                 Rotating Registers                  18.2.3.4.4                 Frame Markers                  18.2.3.4.5                 Backing Store for Register Stack      18.3     Procedure Representation      18.4     Argument List      18.5     Argument Passing Mechanisms          18.5.1         Passing Arguments by Value          18.5.2         Passing Arguments by Reference          18.5.3         Passing Arguments by Descriptor          18.5.4         Parameter Passing Mechanisms for I64              18.5.4.1             Allocation of Parameter Slots          18.5.5         Normal Register Parameters          18.5.6         Argument Information (AI) Register          18.5.7         Memory Stack Parameters          18.5.8         Variable Argument Lists          18.5.9         Pointers to Formal Parameters              18.5.9.1             Languages Other than C          18.5.10         Rounding Floating-Point Values      18.6     Passing Scalars as Arguments      18.7     Passing Arrays as Arguments      18.8     Passing Strings as Arguments      18.9     Combinations of Descriptor Class and Data Type      18.10     Function Value Return      18.11     Condition Value Return      18.12     Macro-32 Register Usage and Mapping for I64          18.12.1         I64 Register Usage Compared with Alpha and VAX              18.12.1.1             I64 Register Mapping in MACRO Compiler              18.12.1.2             Use of MACRO Linkage Directives to Preserve Registers          18.12.2         High-Level Language Compiler Register Mapping Chapter 19 19 Calling Run-Time Library Routines      19.1     Overview      19.2     Call Instructions          19.2.1         Facility Prefix and Routine Name          19.2.2         The RTL Call Entry              19.2.2.1             JSB Call Entries (VAX Only)          19.2.3         Returns from an RTL Routine              19.2.3.1             Facility Return Status and Condition Value Symbols      19.3     Calling a Library Procedure in VAX MACRO (VAX Only)          19.3.1         VAX MACRO Calling Sequence          19.3.2         VAX MACRO CALLS Instruction Example          19.3.3         VAX MACRO CALLG Instruction Example          19.3.4         VAX MACRO JSB Entry Points          19.3.5         Return Status          19.3.6         Function Return Values in VAX MACRO (VAX and Alpha)      19.4     Calling a Library Routine in BLISS          19.4.1         BLISS Calling Sequence          19.4.2         Accessing a Return Status in BLISS          19.4.3         Calling JSB Entry Points from BLISS Chapter 20 20 Calling System Services      20.1     Overview      20.2     Preserving System Integrity          20.2.1         User Privileges          20.2.2         Resource Quotas          20.2.3         Access Modes      20.3     System Service Call Entry      20.4     System Service Completion          20.4.1         Asynchronous and Synchronous System Services          20.4.2         System Service Resource Wait Mode          20.4.3         Condition Values Returned from System Services          20.4.4         Testing the Condition Value              20.4.4.1             Testing the Condition Value With $VMS_STATUS_SUCCESS Macro          20.4.5         Special Condition Values Using Symbolic Codes          20.4.6         Testing the Return Condition Value for VAX MACRO          20.4.7         System Messages Generated by Condition Values      20.5     Program Examples with System Service Calls Previous Next Contents Index