Jane.doe at 12:48, 28 November 2019

2019-11-28T12:48:16Z

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			[[Category:System Services]]

Darya.zelenina: Created page with "'''$GET_ARITH_EXCEPTION''' is a system service that returns information about the exception context for a given arithmetic exception on Alpha systems. T..."

2019-07-10T03:23:19Z

Created page with "'''$GET_ARITH_EXCEPTION''' is a system service that returns information about the exception context for a given arithmetic exception on Alpha systems. T..."

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'''$GET_ARITH_EXCEPTION''' is a [[System Service|system service]] that returns information about the exception context for a given arithmetic exception on [[Alpha]] systems. 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 [https://support.hpe.com/hpsc/doc/public/display?docId=emr_na-c04621389 HP OpenVMS Calling Standard].

The Get Arithmetic Exception Information service returns, to the buffer specified by the [[#buffer|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

=Format=
<nowiki>SYS$GET_ARITH_EXCEPTION </nowiki>[[#sigarg|sigarg]]<nowiki> ,</nowiki>[[#mcharg|mcharg]]<nowiki> ,</nowiki>[[#buffer|buffer]]

C Prototype:
int sys$get_arith_exception (void *sigarg, void *mcharg, void *buffer);

=Arguments=
==sigarg==
{{SyservArgument|signal array|vector_longword_signed|read only|by reference}}

Address of the signal array for the given arithmetic exception.

==mcharg==
{{SyservArgument|mech array|vector_quadword_unsigned|read only|by reference}}

Address of the mechanism array for the given arithmetic exception.

==buffer==
{{SyservArgument|vector_quadword|vector_quadword_unsigned)|write only|by descriptor}}

Four-quadword buffer to receive additional exception context. The buffer argument is the address of a descriptor that points to this buffer.

=Condition Values Returned=
{| class="wikitable"
! colspan="col" | Value
! colspan="col" | Description
|-
| 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.
|}

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$GET ARITH EXCEPTION - Revision history

Jane.doe at 12:48, 28 November 2019

Darya.zelenina: Created page with "'''$GET_ARITH_EXCEPTION''' is a system service that returns information about the exception context for a given arithmetic exception on Alpha systems. T..."