Data Extractor Module Resolution Parameter Block

All input and output parameters reside in a single parameter block. The parameter block is mapped by the macro: CAZDXMRP, which resides in hlq.SCAZSAMP. The DSECT name is CAZDXMRP. All input parameter field names are prefixed with DEXMRI_ and all output parameter field names are prefixed with DEXMRO_.

The following table describes the input fields:

Table 1. Data Extractor Module Resolution Parameter Block Input Fields
Offset	Name	Type	Length	Value	Description
0	DEXMRI_Input	Word	0		Start of input data
0	DEXMRI_Eye	Char	8	DEXMRPB_	Eye catcher
8	DEXMRI_Functn	Byte	1		Function code
	DEXMRI_FRSV	EQU	0	0	Reserved
	DEXMRI_FFirst	EQU	0	4	Initialization or First function call
	DEXMRI_FMR	EQU	0	8	Module Resolution Function call
	DEXMRI_FLast	EQU	0	12	Termination or Last function call
9	DEXMRI_Versn	Byte	1		Parameter block version
	DEXMRI_CVersn	EQU	0	1	Current® version
A	DEXMRI_PLen	HWord	2	352	Length of the entire parameter block
C	DEXMRI_Flags	Byte	1		Flag byte
	DEXMRI_FLLock	EQU	0	x’80’	Local Lock is held
C		Byte	1	Nulls	Reserved
E	DEXMRI_ContxtL	HWord	2	4096	Length of exit’s context area
10	DEXMRI_Contxt@	Word	4		Address of exit’s context area
14	DEXMRI_StepPGM	Byte	8		Job Step program name
1C		Word	4	Nulls	Reserved
20	DEXMRI_Address	Word	4		Sampled address (from PSW)
24	DEXMRI_TCB@	Word	4		Address of sampled TCB
28	DEMRI_ASID	HWord	2		ASID of sampled address space
2A	DEMRI_SASID	HWord	2		ASID where address was sampled
2C		Byte	48	Nulls	Reserved
5C

The following table will describe the output fields which follow immediately after the input fields:

Table 2. Data Extractor Module Resolution Parameter Block Output Fields
Offset	Name	Type	Length	Value	Description
5C	DEXMRO_Output	Word	0		Start of output data
5C	DEXMRO_RC	Byte	1		Return code
	DEXMRO_RCOK	EQU	0	0	Success
	DEXMRO_RCNF	EQU	0	4	Module not found
	DEXMRO_RCErr	EQU	0	8	Error
	DEXMRO_RCSevr EQU	EQU	0	16	Severe error
	DEXMRO_RCNCall	EQU	0	20	Do not call this exit again
5D	DEXMRO_RSN	Byte	1		Reason code
	DEXMRO_RSOK	EQU	0	0	Success
	DEXMRO_RSNI	EQU	0	4	Exit not interested in Job Step
	DEXMRO_RSVersn	EQU	0	8	Parameter block version mismatch
	DEXMRO_RSEye	EQU	0	12	Parameter block eye catcher mismatch
	DEXMRO_RSCtxSz	EQU	0	16	Context area too small
	DEXMRO_RSBPSz	EQU	0	20	Parameter block size not equal
	DEXMRO_RSFunc	EQU	0	24	Unknown function code
	DEXMRO_RSExit	EQU	0	28	Error in exit (see DEXMRO_Msg)
5E		Byte	1	Nulls	Reserved
Resolved Module Information
5F	DEXMRO_Flag1	Byte	1		Flag byte
	DEXMRO_F1_MOD	EQU	0	x’80’	Module data is an MVS™ module
	DEXMRO_F1_PTH	EQU	0	x’40'	Module data is a USS path name
60	DEXMRO_ModData	Byte	0		Start of module data
60	DEXMRO_ModName	Byte	8		Module name
68	DEXMRO_ModDDN	Byte	8		DDName of loadlib (or nulls)
70	DEXMRO_ModDSN	Byte	44		DSName of loadlib (or nulls)

60	DEXMRO_ModPTH@	Byte	4		Address of USS path name length prefix
9C		Word	4	Nulls	Reserved
A0	DEXMRO_MStart@	Word	4		Starting address of module
A4	DEXMRO_MLen	Word	4		Length of module
A8	DEXMRO_UTkn	Byte	8		Module uniqueness token
B0		Byte	48	Nulls	Reserved
E0	DEXMRO_MsgL	Byte	1		Length of error message
E1	DEXMRO_Msg	Byte	120		Error message
160