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On Alpha and I64 systems, obtains data from the user image alignment fault buffer if buffered user alignment fault data reporting has been enabled.This service accepts 64-bit addresses.
SYS$GET_ALIGN_FAULT_DATA buffer ,buffer_size ,return_size
int sys$get_align_fault_data (void *buffer, int buffer_size, int *return_size);
buffer
OpenVMS usage: address type: longword (unsigned) access: read/write mechanism: by 32- or 64-bit reference
The user buffer in which the alignment fault data is to be stored. The buffer is the 32- or 64-bit address of this user buffer.buffer_size
OpenVMS usage: byte count type: longword (signed) access: read mechanism: by value
The size, in bytes, of the buffer specified by the buffer argument.return_size
OpenVMS usage: longword_signed type: longword (signed) access: write mechanism: by 32- or 64-bit reference
The amount of data, in bytes, stored in the buffer. The return_size argument is the 32- or 64-bit address of a naturally aligned longword into which the service returns the size of the buffer. The return_size is set to 0 if there is no data in the buffer.
The Get Alignment Fault Data service obtains data from the user image alignment fault buffer if buffered user alignment fault data reporting has been enabled.When buffered user alignment fault data reporting is enabled, the operating system writes each alignment fault into a user-defined buffer. The user must poll this buffer periodically to read the data.
The user must call the $START_ALIGN_FAULT_REPORT service to enable buffered user alignment fault data reporting.
For more information about buffered user alignment fault data reporting, see the $START_ALIGN_FAULT_REPORT system service.
None
None
$GET_SYS_ALIGN_FAULT_DATA, $INIT_SYS_ALIGN_FAULT_REPORT, $PERM_DIS_ALIGN_FAULT_REPORT, $PERM_REPORT_ALIGN_FAULT, $START_ALIGN_FAULT_REPORT, $STOP_ALIGN_FAULT_REPORT, $STOP_SYS_ALIGN_FAULT_REPORT
SS$_NORMAL The service completed successfully. SS$_ACCVIO The buffer named in the buffer argument is not accessible. SS$_AFR_NOT_ENABLED Alignment fault reporting has not been enabled. SS$_BADPARAM The buffer size is smaller than the minimum defined by the AFR$K_USER_LENGTH
symbol.
On Alpha systems, returns information about the exception context for a given arithmetic exception. There are two forms the signal argument vectors: one for use with 32-bit addresses and one for use with 64-bit addresses.For more information, see the section "Signal Argument Vector" in the HP OpenVMS Calling Standard.
SYS$GET_ARITH_EXCEPTION sigarg ,mcharg ,buffer
int sys$get_arith_exception (void *sigarg, void *mcharg, void *buffer);
sigarg
OpenVMS usage: signal array type: vector_longword_signed access: read only mechanism: by reference
Address of the signal array for the given arithmetic exception.mcharg
OpenVMS usage: mech array type: vector_quadword_unsigned access: read only mechanism: by reference
Address of the mechanism array for the given arithmetic exception.buffer
OpenVMS usage: vector_quadword type: vector_quadword_unsigned access: write only mechanism: by descriptor
Four-quadword buffer to receive additional exception context. The buffer argument is the address of a descriptor that points to this buffer.
The Get Arithmetic Exception Information service returns, to the buffer specified by the buffer argument, the following information for a given arithmetic exception in an array of quadwords:
- First quadword, the PC of the triggering instruction in the trap shadow
- Second quadword, a copy of the triggering instruction
- Third quadword, the exception summary
- Fourth quadword, the register write mask
None
None
SS$_NORMAL The service completed successfully. SS$_ACCVIO The specified buffer cannot be written. SS$_BADBUFLEN The specified buffer length is invalid or out of range.
Returns the default transaction of the calling process.
SYS$GET_DEFAULT_TRANS tid
int sys$get_default_trans (unsigned int tid [4]);
tid
OpenVMS usage: trans_id type: octaword (unsigned) access: write only mechanism: by reference
Address of an octaword in which the identifier (TID) of the default transaction of the calling process is returned.
A precondition for the successful completion of $GET_DEFAULT_TRANS is that the calling process must have a default transaction.$GET_DEFAULT_TRANS may fail for various reasons, including:
- The precondition was not met.
- The default transaction was being changed at the time of the call.
The postcondition on successful completion of $GET_DEFAULT_TRANS is described in Table SYS-45:
Table SYS-45 Postcondition When$GET_DEFAULT_TRANS Completes Successfully Postcondition Meaning The identifier of the default transaction of the calling process is returned. The identifier (TID) of the default transaction of the calling process is returned in the tid argument.
None
None
$ABORT_TRANS, $ABORT_TRANSW, $ACK_EVENT, $ADD_BRANCH, $ADD_BRANCHW, $CREATE_UID, $DECLARE_RM, $DECLARE_RMW, $END_BRANCH, $END_BRANCHW, $END_TRANS, $END_TRANSW, $FORGET_RM, $FORGET_RMW, $GETDTI, $GETDTIW, $JOIN_RM, $JOIN_RMW, $SETDTI, $SETDTIW, $SET_DEFAULT_TRANS, $SET_DEFAULT_TRANSW, $START_BRANCH, $START_BRANCHW, $START_TRANS, $START_TRANSW, $TRANS_EVENT, $TRANS_EVENTW
SS$_NORMAL The request was successful. SS$_INSFARGS A required argument was missing. SS$_INSFMEM There was insufficient system dynamic memory for the operation. SS$_NOCURTID The calling process did not have a default transaction. SS$_WRONGSTATE The default transaction was being changed at the time of the call.
Returns "interesting" fields from the specified lock.Note that this system service is supported only in an OpenVMS Alpha Galaxy environment. For more information about programming with OpenVMS Galaxy system services, refer to the HP OpenVMS Alpha Partitioning and Galaxy Guide.
SYS$GET_GALAXY_LOCK_INFO handle ,name ,timeout ,size ,ipl ,rank ,flags [,name_length]
int sys$get_galaxy_lock_info (unsigned __int64 lock_handle, char *name, unsigned int *timeout, unsigned int *size, unsigned int *ipl, unsigned int *rank, unsigned short int *flags unsigned short int *name_length);
handle
OpenVMS usage: handle for the galaxy lock type: quadword (unsigned) access: read mechanism: input by value
The 64-bit lock handle that identifies the lock on which to return information. This value is returned by SYS$CREATE_GALAXY_LOCK.name
OpenVMS usage: address type: zero-terminated string access: write mechanism: output by reference
Pointer to a buffer. This buffer must be large enough to receive the name of the lock. Locks names are zero-terminated strings with a maximum size of 16 bytes.timeout
OpenVMS usage: address type: longword (unsigned) access: write mechanism: output by reference
Pointer to a longword. The value returned is the timeout value of the lock.size
OpenVMS usage: address type: longword (unsigned) access: write mechanism: output by reference
Pointer to a longword. The value returned is the size of the lock in bytes.ipl
OpenVMS usage: address type: longword (unsigned) access: write mechanism: output by reference
Pointer to a longword. The value returned is the IPL of the lock.rank
OpenVMS usage: address type: longword (unsigned) access: write mechanism: output by reference
Pointer to a longword. The value returned is the rank of the lock.flags
OpenVMS usage: address type: word (unsigned) access: write mechanism: output by reference
Pointer to a word. The value returned is the word mask of lock flags.name_length
OpenVMS usage: address type: word (unsigned) access: write mechanism: output by reference
Length of the string returned in the name argument.
This service returns all "interesting" fields from the specified lock. See the $CREATE_GALAXY_LOCK service for detailed information regarding these values.Read access to lock.
None
$ACQUIRE_GALAXY_LOCK, $CREATE_GALAXY_LOCK, $CREATE_GALAXY_LOCK_TABLE, $DELETE_GALAXY_LOCK, $DELETE_GALAXY_LOCK_TABLE, $GET_GALAXY_LOCK_SIZE, $RELEASE_GALAXY_LOCK
SS$_NORMAL Normal completion. SS$_IVLOCKID Invalid lock id. SS$_IVLOCKTBL Invalid lock table.
Returns the minimum and maximum size of an OpenVMS Galaxy lock.Note that this system service is supported only in an OpenVMS Alpha Galaxy environment.
For more information about programming with OpenVMS Galaxy system services, refer to the HP OpenVMS Alpha Partitioning and Galaxy Guide.
SYS$GET_GALAXY_LOCK_SIZE min_size ,max_size
int sys$get_galaxy_lock_size (unsigned int *min_size, unsigned int *max_size);
min_size
OpenVMS usage: address type: longword (unsigned) access: write mechanism: output by reference
Pointer to a longword. The value returned is minimum legal size of a galaxy lock structure.max_size
OpenVMS usage: address type: longword (unsigned) access: write mechanism: output by reference
Pointer to a longword. The value returned is maximum legal size of a galaxy lock structure.
This service returns the minimum and maximum size of an OpenVMS Galaxy lock. If a lock is created with the maximum size, the locking services will record acquire and release information in the lock.The lock sizes can be used to determine the value of the section_size parameter to the $CREATE_GALAXY_LOCK_TABLE service.
Read access to lock.
None
$ACQUIRE_GALAXY_LOCK, $CREATE_GALAXY_LOCK, $CREATE_GALAXY_LOCK_TABLE, $DELETE_GALAXY_LOCK, $DELETE_GALAXY_LOCK_TABLE, $GET_GALAXY_LOCK_INFO, $RELEASE_GALAXY_LOCK
SS$_NORMAL Normal completion.
On Alpha and I64 systems, gets information about a specified virtual region.This service accepts 64-bit addresses.
SYS$GET_REGION_INFO function_code ,region_id_64 ,start_va_64 ,nullarg ,buffer_length ,buffer_address_64 ,return_length_64
int sys$get_region_info (unsigned int function_code, struct _generic_64 *region_id_64, void *start_va_64, void *reserved, unsigned int buffer_length, void *buffer_address_64, unsigned int *return_length_64);
function_code
OpenVMS usage: function code type: longword (unsigned) access: read only mechanism: by value
Function code specifying how the information you are requesting should be looked up. All function codes return region summary information in the return buffer in the format of the Region Summary Buffer. The Region Summary Buffer format is shown in the table in the buffer_address_64 argument.If less buffer space is specified than the length of the Region Summary Buffer, only the amount of information requested is returned. If more buffer space is specified than the length of the Region Summary Buffer, the service will fill in the buffer. The return length will reflect the amount of useful information written to the buffer, the size of the Region Summary Buffer.
The file VADEF.H in SYS$STARLET_C.TLB and the $VADEF macro in STARLET.MLB define a symbolic name for each function code.
The following function codes are defined:
Symbolic Name Description VA$_REGSUM_BY_ID Return the region summary information for the region whose ID is specified in the region_id_64 argument. VA$_REGSUM_BY_VA Return the region summary information for the region that contains the virtual address specified in the start_va_64 argument. VA$_NEXT_REGSUM_BY_VA Return the region summary information for the region containing the starting address. If the starting address is not in a region, return the region summary information for the next region with a starting address higher than the specified address. Note: For the VA$_NEXT_REGSUM_BY_VA function, OpenVMS checks for a start_va_64 argument in the inaccessible address range in P2 space. If it finds one, OpenVMS adjusts the address to account for the discontinuity. For more information about the layout of the 64-bit virtual address space, see the HP OpenVMS Programming Concepts Manual.
This function code can be used for wildcard operations. See the description of the start_va_64 argument for information on how to program a wildcard operation on regions.
region_id_64
OpenVMS usage: region identifier type: quadword (unsigned) access: read only mechanism: by 32- or 64-bit reference
The region ID associated with the region about which information is requested. This argument is read only if the function code VA$_REGSUM_BY_ID is specified.The file VADEF.H in SYS$STARLET_C.TLB and the $VADEF macro in STARLET.MLB define a symbolic name for each of the three default regions in P0, P1, and P2 space.
The following region IDs are defined:
Symbol Region VA$C_P0 Program region VA$C_P1 Control region VA$C_P2 64-bit program region Other region IDs, as returned by the $CREATE_REGION_64 service, can be specified.
start_va_64
OpenVMS usage: input address type: quadword address access: read only mechanism: by value
Virtual address associated with region about which information is requested. This argument is read only if the function_code argument is VA$_REGSUM_BY_VA or VA$_NEXT_REGSUM_BY_VA.If the function_code argument is VA$_REGSUM_BY_VA, this argument is a virtual address within the region about which you are requesting information.
To perform a wildcard search on all regions, specify VA$_NEXT_REGSUM_BY_VA as the function code and begin with the start_va_64 argument specified as -1. For subsequent calls, specify start_va_64 as the sum of the previous region's start address and length. Call the $GET_REGION_INFO service in a loop until the condition SS$_NOMOREREG is returned.
Note
Before performing the lookup function, OpenVMS sign-extends the 64-bit starting address so that it represents a properly formed virtual address for the CPU.nullarg
OpenVMS usage: null_arg type: longword (unsigned) access: read only mechanism: by value
Placeholding argument reserved to HP.buffer_length
OpenVMS usage: longword_unsigned type: longword (unsigned) access: read only mechanism: by value
Length of the buffer into which information is returned.buffer_address_64
OpenVMS usage: varying_arg type: unspecified access: write only mechanism: by 32- or 64-bit reference
The 32- or 64-bit virtual address of a quadword-aligned buffer into which to return information if the buffer_length argument is nonzero.This argument is ignored if the buffer_length argument is zero.
Table SYS-46 shows the format of the Region Summary Buffer:
Table SYS-46 Region Summary Buffer Format Field name Meaning Field Size (Bytes) Field Offset (Decimal) VA$L_FLAGS Flags used when region was created 4 8 VA$L_REGION_PROTECT Create and owner mode of region 4 12 VA$Q_REGION_ID Region identifier 8 0 VA$PQ_START_VA Starting (lowest) virtual address of region 8 16 VA$Q_REGION_SIZE Total length of region 8 24 VA$PQ_FIRST_FREE_VA First free virtual address in region 8 32 VA$C_REGSUM_LENGTH Length of Region Summary Buffer constant 40 The file VADEF.H in SYS$STARLET_C.TLB and the $VADEF MACRO in STARLET.MLB define the REGSUM structure.
return_length_64
OpenVMS usage: longword_unsigned type: longword (unsigned) access: write only mechanism: by 32- or 64-bit reference
The 32- or 64-bit virtual address of a naturally aligned longword into which the service returns the length of the information in bytes.
The Get Information About a Specified Virtual Region service is a kernel mode service that can be called from any mode. This service gets the requested information about the specified region or the next region in a wildcard search. If the returned value of this service is not a successful condition value, a value cannot be returned in the memory locations pointed to by the buffer_address_64 or return_length_64 arguments.None
None
$CREATE_REGION_64, $DELETE_REGION_64
SS$_NORMAL The service completed successfully. SS$_ACCVIO The buffer_address_64 argument or the return_length_64 argument cannot be written by the caller. SS$_BADPARAM Unrecognized function code. SS$_IVREGID Invalid region ID specified in conjunction with the VA$_REGSUM_BY_ID function code. SS$_NOMOREREG No region at a higher address than specified in the start_va_64 argument, which was specified in conjunction with the wildcard function code VA$_NEXT_REGSUM_BY_VA. SS$_PAGNOTINREG The value specified in the start_va_64 argument is not within a region and was specified in conjunction with the function code VA$_REGSUM_BY_VA.
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