IBM System/360 System Programmer's Guide

Reference
Code
9
36
SVC Routine
Types Reference Notes
all Type 1 SVC routines must use the resident abnor-
mal termination routine to terminate any task.
The entry point to the abnormal termination
routine is in the communication vector table
(CVT). The symbolic name of the entry point is
CVTBTERM.
Type 2, 3, and 4 SVC routines must use the ABEND
macro-instruction to terminate the current task,
and IIiUSt use the resident abnormal termination
routine to terminate a task other than the
current task.
Before the resident abnormal
is entered, the CPU must
maskable interruptions but
interruption, and registers
contain the following:
termination routine
be masked for all
the machine check
0, 1, and 14 must
• Register 0 contains the address of the TCB of
the task to be terminated.
• Register 1 contains the following informa-
tion:
Bit 0 is a 1 if you want a dump taken.
Bit 1 is a 1 if yeu want to terminate a job
step.
Bits 2-7 are zero.
Bits 8-19 contain the error code.
Bits 20-31 are zero.
• Reqister 14 contains the return address. The
resident abnormal termination routine exits
by branching to the address contained in
register 14.
The contents of register 15 are destroyed by the
abnormal termination routine.

IBM System/360 Specifications

General

Brand	IBM
Model	System/360
Category	Desktop
Language	English