SVCSECT Bexadeci.al Field
Displacement Na.e 2C OVF 10R OVF1GB OVF1GA OVF1GS OVF1PA OVF1F OVF1FS OVF2ST OVF2CM OVF2NR OVF20S OVF2WA OVSTAT EQU EQU EOU EOU EOU EOU EOU EOU EOU EOU EOU EOU DC !!i!§ OVSOR EOU OVSPREV EOU OVSAFT EOU OVSBO EOU OVSSO EOU X'SO' X'40' X'20' X'10' X'OS' X
I
04' 1'01' I'SO' X'40' 1'20' X'10' X'OS' B'O'
in OVSTAT --X'80'-- X'40' X'20' X'10' X'OS' Field Description, Contents, Meaning Current option is set on
GPRs before call wanted
GPRs after call wanted
GPRs returned fro. SVC callee PLIS'I wanted
Floating-point registers wanted
Floating-point registers returned fro. SVC callee STOP wanted CftS SVC TRACE wanted
Nor.al return CMS SVCs wanted OS SiCs wanted WAIT CftS SiCs wanted
A*2 Current status of SVCTRACE Override options are On SVCTRACE SAME is valid
After bit; set ty DftSITS BALT override flag SUSPEND override flag DC XL3'0' 2D Reserved for IBM use SVCSAVE DC 1SF'0' 30 INTSVC work area NRMSAV DC 2SD'0' 7S Bor.al standard information
DC F'O' 15S Reserved for IBM use SVCOURT DC F'O' 15C Current SVC count SVCSTOP DC F'O' 160 For tftSITS debugging SVLAD DS F 164 Save R14 for DftSLAD SVLADW DS F 16S Save R14 for DftSLADW SVLFS DS F 16C Save R14 for DftSLFS 170 17S 1S0 18S 190 19S L01DLIST LOADNAME L01DSTRT DC
DC
DC
DC
DC
DC CLS'LOAD' CLS' CLS ') , CLS'ORIGIN' CLS'O' SX'FF' DC 2F'0' 1AO Reserved for IBft use fLIST !2I in 1AS DS OF 1AS ftODLIST DC CL8'LOADftOD' Routine name 1BO DUMCOM DC CLS' Module filename filled in here lBS SSMOR DC X'FF' A*3 Fence; allows all interrupts
1B9 ZER03 DC AL3(0) Address is 3-bytes long and set to zeros
1BC TRABSRT DC CL8' Bolds filenaae of transient routine
236 IBM VM/370 Data Areas and Control Block Logic

SVCSECT Hexadecimal Field
Displacement Naae Field Description, Contents, eeaning ----------- --------------------------------------
1C4 TRANftSK DC AL1 (X'FF') 1*4 1C5 ADTR1NS DC VL3 (TRANSAR) 1C8 TEftP02 DC D'O' For CVD and other scratch use 1DO DC 4F'Oi Reserved for IBe use lEO DS OD 1EO RGPRS DS OF Beturned general-purpose registers lEO RGPRO DS F BO 1E4 RGPR1 DS F B1
1E8 RGPR2 DS F B2 1EC RGPR3 DS F B3 1FO RGPR4 DS F B4
1F4 RGPF5 DS F R5
1F8 RGPR6 DS F B6 1FC RGPR7 DS F R7 200 RGPR8 DS F BS 204 RGPR9 DS F B9 208 RGPR10 DS F R10 20C RGPR11 DS F B11 210 RGPR12 DS F B12
214 RGPR13 DS F B13
218 RGPR14 DS F B14
21C RGPR15 DS F B15 220 RFPRS DS OD Returned floating-point registers 220 RFPRO DS D FPRO 228 RFPR2 DS D FPR2 230 RFPR4 DS D FPR4
238 RFPR6 DS D FPR6 240 NRftUSA' DS 12D NBftSAV user save area Section 2. CftS rata Areas and Contrcl Blocks 237