大型机汇编（mainframe assembler/HLASM）之中断向量表

Linkage	Macro	Function
SVC 00	XDAP	Reads or writes direct access volumes
SVC 00	EXCP	Executes a channel program for graphic access method (GAM)
SVC 01	WAIT	Waits for one or more events
SVC 02	POST	Signals event completion
SVC 03	None	Exits from called program
SVC 04	GETMAIN	Acquires user storage
SVC 05	FREEMAIN	Releases user-acquired storage
SVC 06	LINK	Passes control to another program
SVC 07	XCTL	Passes control to another program at the same task level and does not return to the calling program
SVC 08	LOAD	Reads a program into storage
SVC 09	DELETE	Deletes a loaded program
SVC 10	GETMAIN/ FREEMAIN	Manipulates user free storage
SVC 11	TIME	Gets the time of day
SVC 13	ABEND	Terminates processing with user specified completion and reason codes
SVC 14	SPIE	Sets up an exit to be given control under user selected program interrupts
SVC 17	RESTORE	NOP
SVC 18	BLDL	Builds a directory list for a partitioned data set
SVC 18	FIND	Locates a member of a partitioned data set
SVC 19	OPEN	Prepares a DCB for I/O processing
SVC 20	CLOSE	Completes and secures I/O processing on a DCB
SVC 21	STOW	Updates partitioned dataset directories
SVC 22	OPEN TYPE=J	Prepares a DCB for I/O processing after an RDJFCB has been issued
SVC 23	CLOSE TYPE=T	Temporarily deactivates a tape or DASD file
SVC 24	DEVTYPE	Obtains device-type physical characteristics
SVC 25	TRKBAL	NOP
SVC 31	FEOV	Forces an EOV condition on a tape or DASD file
SVC 35	WTO/WTOR	Writes a message to the operator's terminal
SVC 40	EXTRACT	NOP
SVC 41	IDENTIFY	Adds an entry name to a loaded program
SVC 42	ATTACH	Passes control to another program at a new task level
SVC 44	CHAP	NOP
SVC 46	TTIMER	Tests or cancels timer
SVC 46	STIMERM	Tests or cancels multiple timer (real time only)
SVC 47	STIMER/STIMERM	Sets the timer interval and the timer exit routine
SVC 48	DEQ	NOP
SVC 51	SNAP	Dumps specified areas of storage
SVC 56	ENQ	NOP
SVC 57	FREEDBUF	Releases simulated BDAM buffer
SVC 60	STAE	Sets up an abend exit routine in a 370 virtual machine
SVC 60	ESTAE	Sets up an abend exit routine in a 370, XA and XC virtual machine
SVC 62	DETACH	NOP
SVC 63	CHKPT	NOP
SVC 64	RDJFCB	Obtains information from FILEDEF command about an OS/MVS data set
SVC 68	SYNADAF	Provides SYNAD analysis function
SVC 68	SYNADRLS	Releases SYNADAF message and save areas
SVC 69	BSP	Backs up a record on a tape or disk
SVC 93	TGET/TPUT	Reads or writes a terminal line
SVC 94	TCLEARQ	Clears terminal input queue
SVC 96	STAX	Sets or cancels user exit for terminal attention interrupts
SVC 109	ESPIE	Sets up handlers for program interrupts in XA and XC modes
SVC 112	PGRLSE	NOP
SVC 112	PGOUT	NOP
SVC 113	PGLOAD	NOP
SVC 122	LINK, XCTL, LOAD	Performs a link, transfer of control, or load in XA and XC virtual machines
SVC 138	PGSER	NOP

在大型机汇编里没有向量中断表之说，但它本质上实现了PC汇编中的中断向量表功能（对于中断向量表相信大家都比较熟悉）。

本表本名为SVC（Supervisor Calls）, 其每一个分支其实都对应着一个响应的宏...

打个比方，在HLASM程序里我们会经常用GETMAIN/FREEMAIN来获取/释放内存,上表就是告诉我们，当我们在用GETMAIN的时候其实是响应了'SVC 04'的中断，而FREEMAIN响应的是'SVC 05'的中断。

另外读者还可以参考本人的另一篇博文大型机汇编（mainframe assembler/HLASM）之S0C4解读，此处有对'SVC
35'更详细的解读。

 

                                                    
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