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Programming Interface Information:
This information is NOT
intended to be
used as Programming Interfaces of VM/ESA. It is to be used for diagnosis only. |
LKSBK
Cross Reference (Contains links to field and bit definitions)
LKSBK Prolog
NAME : HCPLKSBK
DESCRIPTION: Linkage Stack block
DSECT : LKSBK
FUNCTION : The LKSBK maps the storage associated with a linkage
stack section.
LOCATED BY : Is a mapping for the entries in a
linkage stack section.
CREATED BY : n/a
DELETED BY : n/a
SERIALIZED : The user of the Control Block is responsi-
ble for the serialization which is:
Instruction stream or Console Funct. Mode
LKSBK Control Block Content
LKSBK DSECT
Hex Dec Type/Val Lng Label (dup) Comments ---- ---- --------- ---- -------------- -------- 0000 0 Structure LKSBK Linkage Stack block stack section entry Mapping for a Linkage stack state entry 0000 0 Bitstring 160 LKSENTRY (0) Map the contents of a linkage stack state entry.(The declared length (160) does not include the state descriptor length(8)). Values of general purpose registers 0000 0 Bitstring 64 LKSGPRS (0) General Purp. Regs. of the caller 00000000 LKSGPRH0 LKSGPRS+0,2 GPR halfword 0 00000000 LKSGPRB0 LKSGPRS+0,1 GPR byte 0 00000001 LKSGPRB1 LKSGPRS+1,1 GPR byte 1 00000002 LKSGPRH1 LKSGPRS+2,2 GPR halfword 1 00000002 LKSGPRB2 LKSGPRS+2,1 GPR byte 2 00000003 LKSGPRB3 LKSGPRS+3,1 GPR byte 3 0000 0 Signed 4 LKSGPR0 General purpose register 0 0004 4 Signed 4 LKSGPR1 General purpose register 1 0008 8 Bitstring 52 LKSGR214 (0) General purpose registers 2-14 0008 8 Signed 4 LKSGPR2 General purpose register 2 000C 12 Signed 4 LKSGPR3 General purpose register 3 0010 16 Signed 4 LKSGPR4 General purpose register 4 0014 20 Signed 4 LKSGPR5 General purpose register 5 0018 24 Signed 4 LKSGPR6 General purpose register 6 001C 28 Signed 4 LKSGPR7 General purpose register 7 0020 32 Signed 4 LKSGPR8 General purpose register 8 0024 36 Signed 4 LKSGPR9 General purpose register 9 0028 40 Signed 4 LKSGPR10 General purpose register 10 002C 44 Signed 4 LKSGPR11 General purpose register 11 0030 48 Signed 4 LKSGPR12 General purpose register 12 0034 52 Signed 4 LKSGPR13 General purpose register 13 0038 56 Signed 4 LKSGPR14 General purpose register 14 003C 60 Signed 4 LKSGPR15 General purpose register 15 Values of Access Registers 0040 64 Bitstring 64 LKSARS (0) Access registers of the caller 00000040 LKSARH0 LKSARS+0,2 AR halfword 0 00000040 LKSARB0 LKSARS+0,1 AR byte 0 00000041 LKSARB1 LKSARS+1,1 AR byte 1 00000042 LKSARH1 LKSARS+2,2 AR halfword 1 00000042 LKSARB2 LKSARS+2,1 AR byte 2 00000043 LKSARB3 LKSARS+3,1 AR byte 3 0040 64 Signed 4 LKSAR0 Access register 0 0044 68 Signed 4 LKSAR1 Access register 1 0048 72 Bitstring 52 LKSAR214 (0) Access registers 2-14 0048 72 Signed 4 LKSAR2 Access register 2 004C 76 Signed 4 LKSAR3 Access register 3 0050 80 Signed 4 LKSAR4 Access register 4 0054 84 Signed 4 LKSAR5 Access register 5 0058 88 Signed 4 LKSAR6 Access register 6 005C 92 Signed 4 LKSAR7 Access register 7 0060 96 Signed 4 LKSAR8 Access register 8 0064 100 Signed 4 LKSAR9 Access register 9 0068 104 Signed 4 LKSAR10 Access register 10 006C 108 Signed 4 LKSAR11 Access register 11 0070 112 Signed 4 LKSAR12 Access register 12 0074 116 Signed 4 LKSAR13 Access register 13 0078 120 Signed 4 LKSAR14 Access register 14 007C 124 Signed 4 LKSAR15 Access register 15 Control field 0080 128 Dbl-Word 8 LKSCR384 (0) CR3 and pieces of CRs 8,4 0080 128 Signed 4 LKSCR3 (0) Control register 3 0080 128 Bitstring 2 LKSPKM PSW-key mask of caller 0082 130 Bitstring 2 LKSSASN Secondary ASN of caller 0084 132 Signed 2 LKSCR8H1 (0) CR8 bits 0-15 0084 132 Bitstring 2 LKSEAX Extended authorization index 0086 134 Signed 2 LKSCR4H2 (0) CR4 bits 16-31 0086 134 Bitstring 2 LKSPASN Primary ASN of caller Program Status Word 0088 136 Dbl-Word 8 LKSPSW (0) PSW of caller (points past instr) 0088 136 Signed 4 LKSPSW0F (0) Caller PSW bits 0-31 0088 136 Bitstring 1 LKSPSW0 Caller PSW byte zero, Syst. Mask .1.. .... PSWPERA X'40' PROGRAM EVENT RECORDING ACTIVE .... .1.. PSWTRAN X'04' ADDRESS TRANSLATE MODE ACTIVE .... ..1. PSWIOSM X'02' I/O INTERRUPTION SUMMARY MASK .... ...1 PSWEXSM X'01' EXTERNAL INTERRUPT SUMMARY MASK 0089 137 Bitstring 1 LKSPSW1 Caller PSW byte one, key/emwp 1111 .... PSWKEY X'F0' PSW ACCESS KEY EXTRACTION MASK .... 1... PSWECMD X'08' EXTENDED CONTROL MODE ACTIVE .... .1.. PSWMCHK X'04' MACHINE CHECK SUMMARY MASK .... ..1. PSWWAIT X'02' PROGRAM WAIT STATE .... ...1 PSWPROB X'01' PROGRAM PROBLEM STATE .... ...1 PSWMAPPD X'01' For BC-mode PSWs created by the 370 Accommodation facility, this bit being set indicates that the PSW is really a "mapped" PSW. See HCPPSW. 008A 138 Bitstring 1 LKSPSW2 Caller PSW byte two, EC mode Secondary/Cond. Code/Pgm mask 11.. .... PSWASMSK X'C0' ADDRESS SPACE CONTROL MASK 11.. .... PSWHMODE X'C0' HOME-SPACE MODE 1... .... PSWSMODE X'80' SECONDARY MODE .1.. .... PSWAMODE X'40' ACCESS-REGISTER MODE ..11 .... PSWCOND X'30' PSW CONDITION CODE ..1. .... PSWCOND2 X'20' PSW CONDITION CODE BIT FOR CC=2,3 ...1 .... PSWCOND1 X'10' PSW CONDITION CODE BIT FOR CC=1,3 .... 1111 PSWPMSK X'0F' FIXO+DECO+EXUN+SIGN PROGRAM MASK .... 1... PSWFIXO X'08' FIXED-PT OVERFLOW INTRPT MASK .... .1.. PSWDECO X'04' DECIMAL OVERFLOW INTRPT MASK .... ..1. PSWEXUN X'02' EXPONENT UNDERFLOW INTRPT MASK .... ...1 PSWSIGN X'01' SIGNIFICANCE INTERRUPT MASK .... .... PSWPMODE X'00' PRIMARY-SPACE MODE 008B 139 Bitstring 1 LKSPSW3 Caller PSW byte three, 008C 140 Signed 4 LKSPSW4F (0) PSW instruction address (S/370 bits 32-39 zero) 008C 140 Bitstring 1 LKSPSW4 Caller EC PSW byte four, AMode 1... .... PSW31BT X'80' 31-BIT LOGICAL ADDRESSING MODE .111 1111 PSWHIADR X'7F' INSTRUCTION COUNTER BITS 1-7 - MUST BE ZERO IN 24-BIT MODE. .... .... PSW31AMF X'80000000' ADDRESS MODE FULLWORD MASK - CORRESPONDS TO PSW31BT 008D 141 Bitstring 3 LKSPSW57 Caller EC PSW byte 5,6,7 BC Instr. 0090 144 Dbl-Word 8 LKSDATA (0) Data for specific types of entries Mapping for LKSDATA for a Branch state entry 0090 144 Signed 4 * Reserved 0094 148 Address 4 LKSBADDR (0) Branch address for a branch state entry 0094 148 Bitstring 1 LKSBADD0 Byte 0 1... .... LKSAMODE X'80' Addressing mode bit for a branch state entry 0095 149 Bitstring 3 * Reserved 0098 152 Dbl-Word 8 LKSMODFA Modifiable area 000000A0 LKSENLEN *-LKSENTRY Number of bytes to back up pointer for a state entry dsect Mapping for a Linkage stack entry descriptor 00A0 160 Dbl-Word 8 LKSEDESC (0) Entry descriptor 00A0 160 Bitstring 1 LKSETYPE Entry type 00000001 LKSHEADR 1 Header entry 00000002 LKSTRAIL 2 Trailer entry 00000004 LKSBRSTT 4 Branch and stack state entry 00000005 LKSPCSTT 5 Program call state entry 0000007F LKSETMSK 127 Mask to obtain entry type 1... .... LKSUSUPR X'80' Unstack suppression bit, valid for header or state entries 00A1 161 Bitstring 1 LKSSECID Section identification 00A2 162 Bitstring 2 LKSRFS Remaining free space in bytes between this entry and the trailer entry. 00A4 164 Bitstring 2 LKSNES Next entry size in bytes, zero if the current entry 00A6 166 Bitstring 2 * Reserved 00000008 LKSEDSIZ *-LKSEDESC Number of bytes in entry descriptor Size of state entry = Number of bytes in state entry DSECT + Number of bytes in entry descriptor 000000A8 LKSENSIZ LKSENLEN+LKSEDSIZ Number of bytes in state entry Mapping for LKSDATA for a PC state entry 0090 144 Signed 4 * Reserved 0094 148 Signed 4 LKSPCNUM PC number for a program-call state entry Mapping for linkage stack Header or Trailer 0098 152 Bitstring 8 LKSHDTR (0) Map the contents of the linkage stack Header or Trailer 0098 152 Signed 4 * Reserved 009C 156 Address 4 LKSBFSA (0) Backward stack-entry address or forward-section-header address respectively for header and trailer entries 009C 156 Bitstring 1 LKSNXST0 Byte 0 1... .... LKSVALID X'80' LLSBFSA pointer is valid. 009D 157 Bitstring 3 * 00000008 LKSHLEN *-LKSHDTR Number of bytes to back up pointer for a Header or Trailer DSECT
LKSBK Storage Layout
*** LKSBK - Linkage Stack block * * +---------------------------+---------------------------+ * 0 | LKSGPR0 | LKSGPR1 | * +---------------------------+---------------------------+ * 8 | LKSGPR2 | LKSGPR3 | * +---------------------------+---------------------------+ * 10 | LKSGPR4 | LKSGPR5 | * +---------------------------+---------------------------+ * 18 | LKSGPR6 | LKSGPR7 | * +---------------------------+---------------------------+ * 20 | LKSGPR8 | LKSGPR9 | * +---------------------------+---------------------------+ * 28 | LKSGPR10 | LKSGPR11 | * +---------------------------+---------------------------+ * 30 | LKSGPR12 | LKSGPR13 | * +---------------------------+---------------------------+ * 38 | LKSGPR14 | LKSGPR15 | * +---------------------------+---------------------------+ * 40 | LKSAR0 | LKSAR1 | * +---------------------------+---------------------------+ * 48 | LKSAR2 | LKSAR3 | * +---------------------------+---------------------------+ * 50 | LKSAR4 | LKSAR5 | * +---------------------------+---------------------------+ * 58 | LKSAR6 | LKSAR7 | * +---------------------------+---------------------------+ * 60 | LKSAR8 | LKSAR9 | * +---------------------------+---------------------------+ * 68 | LKSAR10 | LKSAR11 | * +---------------------------+---------------------------+ * 70 | LKSAR12 | LKSAR13 | * +---------------------------+---------------------------+ * 78 | LKSAR14 | LKSAR15 | * +-------------+-------------+-------------+-------------+ * 80 | LKSPKM | LKSSASN | LKSEAX | LKSPASN | * +------+------+------+------+------+------+-------------+ * 88 |:PSW0 |:PSW1 |:PSW2 |:PSW3 |:PSW4 | LKSPSW57 | * +------+------+------+------+------+--------------------+ * 90 |///////////////////////////|:BADD0|////////////////////| * +---------------------------+------+--------------------+ * 98 | LKSMODFA | * +------+------+-------------+-------------+-------------+ * A0 |:ETYPE|:SECID| LKSRFS | LKSNES |/////////////| * +------+------+-------------+-------------+-------------+ * A8 * *** LKSBK - Linkage Stack block *** Overlay for LKSDATA in LKSBK * * +---------------------------+---------------------------+ * 90 |///////////////////////////| LKSPCNUM | * +---------------------------+---------------------------+ * 98 * *** Overlay for LKSDATA in LKSBK *** Overlay for LKSEDESC-LKSHLEN in LKSBK * * +---------------------------+------+--------------------+ * 98 |///////////////////////////|:NXST0|////////////////////| * +---------------------------+------+--------------------+ * A0 * *** Overlay for LKSEDESC-LKSHLEN in LKSBK
LKSBK Cross Reference
(contains links to field and bit definitions)Symbol Dspl Value -------------- ---- -----LKSAMODE 0094 80
LKSARB0 0040 00000040
LKSARB1 0040 00000041
LKSARB2 0040 00000042
LKSARB3 0040 00000043
LKSARH0 0040 00000040
LKSARH1 0040 00000042
LKSARS 0040
LKSAR0 0040
LKSAR1 0044
LKSAR10 0068
LKSAR11 006C
LKSAR12 0070
LKSAR13 0074
LKSAR14 0078
LKSAR15 007C
LKSAR2 0048
LKSAR214 0048
LKSAR3 004C
LKSAR4 0050
LKSAR5 0054
LKSAR6 0058
LKSAR7 005C
LKSAR8 0060
LKSAR9 0064
LKSBADDR 0094
LKSBADD0 0094
LKSBFSA 009C
LKSBRSTT 00A0 00000004
LKSCR3 0080
LKSCR384 0080
LKSCR4H2 0086
LKSCR8H1 0084
LKSDATA 0090
LKSEAX 0084
LKSEDESC 00A0
LKSEDSIZ 00A6 00000008
LKSENLEN 0098 000000A0
LKSENSIZ 00A6 000000A8
LKSENTRY 0000
LKSETMSK 00A0 0000007F
LKSETYPE 00A0
LKSGPRB0 0000 00000000
LKSGPRB1 0000 00000001
LKSGPRB2 0000 00000002
LKSGPRB3 0000 00000003
LKSGPRH0 0000 00000000
LKSGPRH1 0000 00000002
LKSGPRS 0000
LKSGPR0 0000
LKSGPR1 0004
LKSGPR10 0028
LKSGPR11 002C
LKSGPR12 0030
LKSGPR13 0034
LKSGPR14 0038
LKSGPR15 003C
LKSGPR2 0008
LKSGPR3 000C
LKSGPR4 0010
LKSGPR5 0014
LKSGPR6 0018
LKSGPR7 001C
LKSGPR8 0020
LKSGPR9 0024
LKSGR214 0008
LKSHDTR 0098
LKSHEADR 00A0 00000001
LKSHLEN 009D 00000008
LKSMODFA 0098
LKSNES 00A4
LKSNXST0 009C
LKSPASN 0086
LKSPCNUM 0094
LKSPCSTT 00A0 00000005
LKSPKM 0080
LKSPSW 0088
LKSPSW0 0088
LKSPSW0F 0088
LKSPSW1 0089
LKSPSW2 008A
LKSPSW3 008B
LKSPSW4 008C
LKSPSW4F 008C
LKSPSW57 008D
LKSRFS 00A2
LKSSASN 0082
LKSSECID 00A1
LKSTRAIL 00A0 00000002
LKSUSUPR 00A0 80
LKSVALID 009C 80
PSWAMODE 008A 40
PSWASMSK 008A C0
PSWCOND 008A 30
PSWCOND1 008A 10
PSWCOND2 008A 20
PSWDECO 008A 04
PSWECMD 0089 08
PSWEXSM 0088 01
PSWEXUN 008A 02
PSWFIXO 008A 08
PSWHIADR 008C 7F
PSWHMODE 008A C0
PSWIOSM 0088 02
PSWKEY 0089 F0
PSWMAPPD 0089 01
PSWMCHK 0089 04
PSWPERA 0088 40
PSWPMODE 008A 00
PSWPMSK 008A 0F
PSWPROB 0089 01
PSWSIGN 008A 01
PSWSMODE 008A 80
PSWTRAN 0088 04
PSWWAIT 0089 02
PSW31AMF 008C 00
PSW31BT 008C 80
Last updated on 3 Aug 1999 at 12:10:51 EDT.
Copyright IBM Corporation, 1990, 1999