Re: C/C++ Calling OBTAIN / IGC0002G
On Thu, 21 May 2009 15:54:08 -0400 John Kington john.king...@convergys.com wrote: : well i finally figured out why my old copy of the Michaels code did not : work and the new stuff he sent did. : in one case the macros in the assembler code obtasm.s properly continued : in column 16 and in the other improperly in column 17. : But there were no assembly errors. Should not the CEENTRY macro have : flagged an error if could not recognize the parms beginning with a : blank? It must have just ignored the parms so the generated code got an : 0c4 abend. :If there is a blank in column 16 on a continuation line in a macro, :everything is treated as a comment. Brings back memories of reading a vsam :file backward because I could not figure out why I could not do a direct :read against my ACB. Nowadays I believe you get a warning about the trailing comma. -- Binyamin Dissen bdis...@dissensoftware.com http://www.dissensoftware.com Director, Dissen Software, Bar Grill - Israel Should you use the mailblocks package and expect a response from me, you should preauthorize the dissensoftware.com domain. I very rarely bother responding to challenge/response systems, especially those from irresponsible companies. -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@bama.ua.edu with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
Re: C/C++ Calling OBTAIN / IGC0002G
well i finally figured out why my old copy of the Michaels code did not work and the new stuff he sent did. in one case the macros in the assembler code obtasm.s properly continued in column 16 and in the other improperly in column 17. But there were no assembly errors. Should not the CEENTRY macro have flagged an error if could not recognize the parms beginning with a blank? It must have just ignored the parms so the generated code got an 0c4 abend. good code: OBTAIN CEEENTRY PPA=MAINPPA, ADRESSE AUF PROGRAM PROLOG AREA X AUTO=WORKSIZE,GROESSE DER DSECT (- SAVEAREA!) X NAB=NO, NAB NICHT ZWINGEND VORHANDEN X MAIN=NO, KEIN HAUPTPROGRAMMX EXPORT=NO,ENTRYPOINT NICHT EXPORTIEREN X BASE=R11 BASISREGISTER bad code: OBTAIN CEEENTRY PPA=MAINPPA, ADDR OF PROGRAM PROLOG AREA X AUTO=WORKSIZE,SIZE OF DSECT (- SAVEAREA!) XX NAB=NO, NAB NOT USED XX MAIN=NO, NO MAINPROG XX EXPORT=NO,DONT EXPORT ENTRYPOINT XX -Original Message- From: IBM Mainframe Discussion List [mailto:ibm-m...@bama.ua.edu] On Behalf Of Barkow, Eileen Sent: Monday, May 18, 2009 3:50 PM To: IBM-MAIN@bama.ua.edu Subject: Re: C/C++ Calling OBTAIN / IGC0002G Micheal, this new stuff you sent works!! i have to compare them with the old files i was using. thanks again -Original Message- From: IBM Mainframe Discussion List [mailto:ibm-m...@bama.ua.edu] On Behalf Of Michael Knigge Sent: Monday, May 18, 2009 3:11 PM To: IBM-MAIN@bama.ua.edu Subject: Re: C/C++ Calling OBTAIN / IGC0002G Eileen, I don't know what is happening at your site, but on our system everything runs fine. I was able to compile and link the source and successfully do an OBTAIN for SYS1.PARMLIB on volume Z9RES1. I'll attach once again my source and also the SYSOUT of the c++ so you can compare your and my settings Good luck! Bye, Michael -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@bama.ua.edu with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@bama.ua.edu with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@bama.ua.edu with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
Re: C/C++ Calling OBTAIN / IGC0002G
Eileen, well i finally figured out why my old copy of the Michaels code did not work and the new stuff he sent did. in one case the macros in the assembler code obtasm.s properly continued in column 16 and in the other improperly in column 17. But there were no assembly errors. Should not the CEENTRY macro have flagged an error if could not recognize the parms beginning with a blank? It must have just ignored the parms so the generated code got an 0c4 abend. If there is a blank in column 16 on a continuation line in a macro, everything is treated as a comment. Brings back memories of reading a vsam file backward because I could not figure out why I could not do a direct read against my ACB. Regards, John -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@bama.ua.edu with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
Re: C/C++ Calling OBTAIN / IGC0002G
Eileen, I don't know what is happening at your site, but on our system everything runs fine. I was able to compile and link the source and successfully do an OBTAIN for SYS1.PARMLIB on volume Z9RES1. I'll attach once again my source and also the SYSOUT of the c++ so you can compare your and my settings Good luck! Bye, Michael -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@bama.ua.edu with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html *-- R0 EQU 0 R1 EQU 1 R2 EQU 2 R3 EQU 3 R4 EQU 4ADRESSIERUNG DER PARAMETER R5 EQU 5 R6 EQU 6 R7 EQU 7 R8 EQU 8 R9 EQU 9 R10 EQU 10 R11 EQU 11 BASISREGISTER R12 EQU 12 LE/370 COMMON ANCHOR AREA (CAA) R13 EQU 13 LE/370 DYNAMIC SAVE AREA (DSA) R14 EQU 14 R15 EQU 15 *-- PARM DSECT PARM_FLG DSFFUNKTIONSCODE HEX'C100' PARM_DSN DSFADRESSE AUF DSN (MUSS 44 BYTES LANG SEIN) PARM_VOL DSFADRESSE AUF VOLSER (MUSS 6 BYTES LANG SEIN) PARM_WRK DSFADRESSE AUF 140 BYTE WORK/RETURN-AREA *-- *-- OBTAIN CEEENTRY PPA=MAINPPA, ADRESSE AUF PROGRAM PROLOG AREA X AUTO=WORKSIZE,GROESSE DER DSECT (- SAVEAREA!) X NAB=NO, NAB NICHT ZWINGEND VORHANDEN X MAIN=NO, KEIN HAUPTPROGRAMMX EXPORT=NO,ENTRYPOINT NICHT EXPORTIEREN X BASE=R11 BASISREGISTER * USING CEECAA,R12COMMON ANCHOR AREA USING CEEDSA,R13DSA + LOKALE (DYNAM.) VARIABLEN *-- L R4,0(R1) ADRESSE AUF PARAMETER LADEN USING PARM,R4 PARAMETER ADRESSIEREN * OBTAIN PARM OBTAIN AUFRUFEN STR15,RETCODE RETURNCODE SICHERN * CEETERM RC=RETCODE *-- MAINPPA CEEPPA PROGRAM PROLOG AREA LTORG *-- CEEDSA DSECT: DYNAMIC SAVE AREA RETCODE DS F RETURNCODE DS 0D ALIGNMENT SICHERSTELLEN WORKSIZE EQU *-CEEDSA *-- CEECAA DSECT: COMMON ANCHOR AREA CEEEDB DSECT: ENCLAVE DATA BLOCK *-- END -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@bama.ua.edu with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html //* c++ //COMPILE EXEC PGM=CCNDRVR, // PARM='POSIX(OFF) ABT(RETCODE) ENVAR(PDFDIR=./, __CBC_EXTENDED=9)/ // ./ ./ctoasm.c *.c // CMDOPTS(OE,NOLSEARCH, // START,LONGNAME,RENT,TERMINAL, // OBJECT(ctoasm.o), // HALT(16),NOMARGINS,NESTINC(255),NOSEQUENCE,NOSSCOM, // NOEVENTS,NOALIAS,TARGET(LE),NOEXPORTALL, // ARGPARSE,EXECOPS,PLIST(HOST),REDIR, // LOCALE(POSIX), // LANGLVL(ANSI),NOUPCONV,NOLIBANSI,ANSIALIAS, // NOINLINE(AUTO,NOREPORT,100,1000),MEMORY,MAXMEM(*),SPILL(128), // NODEBUG,NOTEST,NOGONUMBER, // NOLIST(/dev/fd1),NOSOURCE(/dev/fd1), // NOAGGREGATE,NOEXPMAC,NOOFFSET,NOSHOWINC,NOXREF, // NOINFO,FLAG(W),NOIPA), // DEFINE(errno=(*__errno())), // DEFINE(_OPEN_DEFAULT=1), // NOSEARCH,SEARCH(/usr/include/, ///usr/lpp/cbclib/include/, ////''CEE.SCEEH.+'', ////''CBC.SCLBH.+''), // NOPPONLY(NOCOMMENTS,NOLINES,/dev/fd1,2048), // OPTIMIZE(0)' //*STEPLIB DD DSN=CEE.SCEERUN,DISP=SHR //*DD DSN=CBC.SCCNCMP,DISP=SHR //* c++ //ASSEMBLE EXEC PGM=ASMA90, // PARM='NODECK,OBJECT,TERM, // NOLIST,NOESD,NORLD,NOXREF,FLAG(4)' //SYSLIB DD DSN='CEE.SCEEMAC',DISP=SHR,DCB=DSORG=DIR // DD DSN='SYS1.MACLIB',DISP=SHR,DCB=DSORG=DIR // DD DSN='SYS1.MODGEN',DISP=SHR,DCB=DSORG=DIR //SYSPUNCH DD DUMMY //SYSUT1 DD UNIT=SYSDA,SPACE=(32000,(30,30)), // STORCLAS=,MGMTCLAS=,DATACLAS=,DSNTYPE=, // DCB=(RECFM=F,LRECL=4088,BLKSIZE=4088)
Re: C/C++ Calling OBTAIN / IGC0002G
Thanks alot Michael. I am trying to compile and link the programs in batch but am running into other problems, so you attachments will be a big help. -Original Message- From: IBM Mainframe Discussion List [mailto:ibm-m...@bama.ua.edu] On Behalf Of Michael Knigge Sent: Monday, May 18, 2009 3:11 PM To: IBM-MAIN@bama.ua.edu Subject: Re: C/C++ Calling OBTAIN / IGC0002G Eileen, I don't know what is happening at your site, but on our system everything runs fine. I was able to compile and link the source and successfully do an OBTAIN for SYS1.PARMLIB on volume Z9RES1. I'll attach once again my source and also the SYSOUT of the c++ so you can compare your and my settings Good luck! Bye, Michael -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@bama.ua.edu with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@bama.ua.edu with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
Re: C/C++ Calling OBTAIN / IGC0002G
I am trying to compile and link the programs in batch but am running into other problems, so you attachments will be a big help. Well, I usually work under Batch I could send you my compile and link JCL complete with all options (for asm, compile and link) if you wish Bye, Michael -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@bama.ua.edu with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
Re: C/C++ Calling OBTAIN / IGC0002G
Yes, please send the batch jobs. as i said in my previous post, your programs now work under unix. and thanks again Michael. -Original Message- From: IBM Mainframe Discussion List [mailto:ibm-m...@bama.ua.edu] On Behalf Of Michael Knigge Sent: Monday, May 18, 2009 3:47 PM To: IBM-MAIN@bama.ua.edu Subject: Re: C/C++ Calling OBTAIN / IGC0002G I am trying to compile and link the programs in batch but am running into other problems, so you attachments will be a big help. Well, I usually work under Batch I could send you my compile and link JCL complete with all options (for asm, compile and link) if you wish Bye, Michael -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@bama.ua.edu with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@bama.ua.edu with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
Re: C/C++ Calling OBTAIN / IGC0002G
point OBTAIN at compile unit offset + 0086 at entry offset +0086 at address 18BEA116. LEAID ENTERED (LEVEL 04/01/2008 AT 12.32) LEAID PROCESSING COMPLETE. RC=0 [1] + Done(139) ctoasm 83886348 Segmentation violation ./ctoasm $ -Original Message- From: IBM Mainframe Discussion List [mailto:ibm-m...@bama.ua.edu] On Behalf Of Michael Knigge Sent: Thursday, May 14, 2009 4:47 PM To: IBM-MAIN@bama.ua.edu Subject: Re: C/C++ Calling OBTAIN / IGC0002G Barkow, Eileen schrieb: i tried to use the assembler code given in a previous post and got about the same 0c4 abend i got using OBTAIN in c. can you give me a copy of the assembler code that worked. The code posted is the code that works. Give use your code (asm + c) and your compiler+asm+link options and I'll compare them with mine... maybe we can see what is going wrong Bye, Michael -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@bama.ua.edu with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@bama.ua.edu with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
Re: C/C++ Calling OBTAIN / IGC0002G
CEEEDB DSECT: ENCLAVE DATA BLOCK END to compile: (get no errors) c++ -v -o ctoasm ctoasm.c obtasm.s when run: $ ctoasm CEE3204S The system detected a protection exception (System Completion Code=0C4) . From compile unit OBTAIN at entry point OBTAIN at compile unit offset + 0086 at entry offset +0086 at address 18BEA116. LEAID ENTERED (LEVEL 04/01/2008 AT 12.32) LEAID PROCESSING COMPLETE. RC=0 [1] + Done(139) ctoasm 83886348 Segmentation violation ./ctoasm $ -Original Message- From: IBM Mainframe Discussion List [mailto:ibm-m...@bama.ua.edu] On Behalf Of Michael Knigge Sent: Thursday, May 14, 2009 4:47 PM To: IBM-MAIN@bama.ua.edu Subject: Re: C/C++ Calling OBTAIN / IGC0002G Barkow, Eileen schrieb: i tried to use the assembler code given in a previous post and got about the same 0c4 abend i got using OBTAIN in c. can you give me a copy of the assembler code that worked. The code posted is the code that works. Give use your code (asm + c) and your compiler+asm+link options and I'll compare them with mine... maybe we can see what is going wrong Bye, Michael -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@bama.ua.edu with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@bama.ua.edu with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html -- Terpea Cristian Senior Software Developer Fortech SRL Str. C-tin Brancoveanu nr. 6 Cluj-Napoca, 400467 Romania Tel:+40 264 453 303 Fax:+40 264 438 217 Email: cristian.ter...@fortech.ro Web:www.fortech.ro The information contained in this message is confidential and may be legally privileged.The information transmitted is intended only for the person or entity to which it is addressed and may contain confidential and/or privileged material. If you are not the intended recipient, you are hereby notified that any review, retransmission, dissemination or other use of, or taking of any action in reliance upon this information is strictly prohibited and may be unlawful. If you received this in error, please contact the sender and delete the material from any computer. Fortech SRL excludes the liability for any damage which might result from this e-mail message. -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@bama.ua.edu with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
Re: C/C++ Calling OBTAIN / IGC0002G
I just added the work parm to see if it made any difference - but it did
not.
when i run the thing in batch with trap OFF and Nospie, i get a real 0c4
abend - i am going to get a system dump to see where the abend is - in
the c or asm module.
IEA995I SYMPTOM DUMP OUTPUT 710
SYSTEM COMPLETION CODE=0C4 REASON CODE=0004
TIME=10.40.43 SEQ=03238 CPU= ASID=0031
PSW AT TIME OF ERROR 078D0400 98A0011C ILC 6 INTC 04
ACTIVE LOAD MODULE ADDRESS=18A0 OFFSET=011C
NAME=CTOASM
DATA AT PSW 18A00116 - D203B0A4 D0804110 B09858F0
GR 0: 03B8 1: 00AC1C48
2: 000173A8 3: 000107F0
4: 800173C0 5: 8000
thanks Cristi
-Original Message-
From: IBM Mainframe Discussion List [mailto:ibm-m...@bama.ua.edu] On
Behalf Of Cristi Terpea
Sent: Friday, May 15, 2009 10:42 AM
To: IBM-MAIN@bama.ua.edu
Subject: Re: C/C++ Calling OBTAIN / IGC0002G
Hey,
One quick look, you're calling call_obtain with 3 arguments.. although
it's got only two. Another thing, don't bother setting 44 spaces, this
will be done in call_obtain.
int main()
{
call_obtain(DATASET,VOLUME);
}
Best regards,
Cristi Terpea
Barkow, Eileen wrote:
here goes - the c program (cotasm.c) was also copied from a post (i
think Crista's) and added the main section.
i thought i knew a little C from studying Microsoft's c# for Windows,
but when i look at c, c++ on the mainframe I know next to nothing - c#
is completely different. That is why i got interested in this topic.
actually, i get the same type of abend (segmentation violation) trying
to run some of the jni examples i have found (using c and java),
although some do work and others abend. and the abends happen when
running both batch and under OMVS. i have not yet looked up what the
segmentation violation abend means.
ctoasm.c
int OBTAIN(unsigned long[]);
#pragma linkage(OBTAIN, OS)
#pragma pack(1) /* 1 byte alignment */
typedef struct
{
char Ds1FmtId;
char Ds1Dssn[6];
unsigned short Ds1VolSq;
char Ds1CreDt[3];
char Ds1ExpDt[3];
unsigned char Ds1NoEpv;
unsigned char Ds1NoBdb;
unsigned char Ds1Flag1;
char Ds1SysCd[13];
char Ds1RefDt[3];
unsigned char Ds1SmsFg;
unsigned char Ds1ScXft;
unsigned short Ds1ScXtv;
unsigned char Ds1DsOrg[2];
unsigned char Ds1RecFm;
unsigned char Ds1OptCd;
unsigned short Ds1BlkL;
unsigned short Ds1LrecL;
unsigned char Ds1KeyL;
unsigned short Ds1Rkp;
unsigned char Ds1DsInd;
unsigned char Ds1ScAl1;
unsigned char Ds1ScAl3[3];
unsigned char Ds1LstAr[3];
unsigned short Ds1TrBal;
unsigned char Reserved;
unsigned char Ds1Tthi;
unsigned char Ds1Ext1[10];
unsigned char Ds1Ext2[10];
unsigned char Ds1Ext3[10];
unsigned char Ds1PtrDs[5];
char Filler[44];
} DSCB;
#pragma pack() /* default alignment */
int call_obtain(char *Dsn, char *VolSer) {
intRc;
unsigned long Parm[4];
char ParmDsn[44];
char ParmVolSer[6];
DSCB Dscb;
memset(ParmDsn, ' ', 44);
memcpy(ParmDsn, Dsn, strlen(Dsn));
memset(ParmVolSer, ' ', 6);
memcpy(ParmVolSer, VolSer, strlen(VolSer)); /*should be 6
always!*/
Parm[0] = 0xC100;
Parm[1] = (unsigned long) ParmDsn;
Parm[2] = (unsigned long) ParmVolSer;
Parm[3] = (unsigned long) Dscb;
if((Rc = OBTAIN(Parm[0])) != 0)
return(Rc);
/* do something with DSCB */
return(0);
}
int main()
{
char dsname[44], volume[6];
memset(dsname,' ',44);
,Command ===,
memcpy(dsname, XCICS.EILEEN.PDSE, 17);
memset(volume,' ', 6);
memcpy(volume, CICH92, 6);
memset(work,' ',140);
call_obtain(dsname,volume,work);
}
**assembler program obtasm.s
* Top of Data *
*
R0 EQU 0
R1 EQU 1
R2 EQU 2
R3 EQU 3
R4 EQU 4PARMS
R5 EQU 5
R6 EQU 6
R7 EQU 7
R8 EQU 8
R9 EQU 9
R10 EQU 10
R11 EQU 11 BASE
R12 EQU 12 LE/370 COMMON ANCHOR AREA (CAA)
R13 EQU 13 LE/370 DYNAMIC SAVE AREA (DSA)
R14 EQU 14
R15 EQU 15
*
PARM DSECT
PARM_FLG DSFFUNCTION-CODE HEX'C100'
PARM_DSN DSFADDR OF DSN (44 BYTES)
PARM_VOL DSFADDR OF VOLSER (6 BYTES)
PARM_WRK DSFADDR OF 140 BYTE WORK/RETURN-AREA
*
*
OBTAIN CEEENTRY PPA=MAINPPA, ADDR OF PROGRAM PROLOG AREA
X
AUTO=WORKSIZE,SIZE OF DSECT (- SAVEAREA!)
XX
NAB=NO, NAB NOT USED
XX
MAIN=NO, NO MAINPROG
XX
EXPORT=NO,DONT EXPORT ENTRYPOINT
XX
BASE=R11 BASE
*
USING
Re: C/C++ Calling OBTAIN / IGC0002G
Hi,
but when i look at c, c++ on the mainframe I know next to nothing - c#
is completely different. That is why i got interested in this topic.
Well, C# ist more like Java as C or C++
although some do work and others abend. and the abends happen when
running both batch and under OMVS. i have not yet looked up what the
segmentation violation abend means.
segmentation violation is a S0C4.
int main()
{
char dsname[44], volume[6];
memset(dsname,' ',44);
,Command ===,
memcpy(dsname, XCICS.EILEEN.PDSE, 17);
memset(volume,' ', 6);
memcpy(volume, CICH92, 6);
memset(work,' ',140);
call_obtain(dsname,volume,work);
Try
call_obtain(XCICS.EILEEN.PDSE, CICH92);
and remove the stuff above...
Bye,
Michael
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Re: C/C++ Calling OBTAIN / IGC0002G
I removed all the stuff and got the same abend at the same offset, which
appears to be in the c module.
i have to get the load map, or maybe compile in batch but the jcl
generated with -v gives so many parms that it is hard to copy over for
batch run.
i just copied the hfs module into a pdse and executed it, which i think
is okay to do.
thanks for looking at this Michael.
int main()
{
call_obtain(XCICS.EILEEN.PDSE, CICH92);
/*char dsname[44], volume[6]; */
/* memset(dsname,' ',44); */
/* memcpy(dsname, XCICS.EILEEN.PDSE, 17); */
/* memset(volume,' ', 6); */
/* memcpy(volume, CICH92, 6); */
/* call_obtain(dsname,volume); */
}
IEA995I SYMPTOM DUMP OUTPUT 311
SYSTEM COMPLETION CODE=0C4 REASON CODE=0004
TIME=11.57.15 SEQ=03253 CPU= ASID=0031
PSW AT TIME OF ERROR 078D0400 98A0011C ILC 6 INTC 04
ACTIVE LOAD MODULE ADDRESS=18A0 OFFSET=011C
NAME=CTOASM
DATA AT PSW 18A00116 - D203B0A4 D0804110 B09858F0
GR 0: 03B8 1: 00AC1C48
2: 00017368 3: 000107F0
4: 80017380 5: 8000
6: 0001 7: 98F8AA3A
8: 0030 9: 8000
-Original Message-
From: IBM Mainframe Discussion List [mailto:ibm-m...@bama.ua.edu] On
Behalf Of Michael Knigge
Sent: Friday, May 15, 2009 11:46 AM
To: IBM-MAIN@bama.ua.edu
Subject: Re: C/C++ Calling OBTAIN / IGC0002G
Hi,
but when i look at c, c++ on the mainframe I know next to nothing - c#
is completely different. That is why i got interested in this topic.
Well, C# ist more like Java as C or C++
although some do work and others abend. and the abends happen when
running both batch and under OMVS. i have not yet looked up what the
segmentation violation abend means.
segmentation violation is a S0C4.
int main()
{
char dsname[44], volume[6];
memset(dsname,' ',44);
,Command ===,
memcpy(dsname, XCICS.EILEEN.PDSE, 17);
memset(volume,' ', 6);
memcpy(volume, CICH92, 6);
memset(work,' ',140);
call_obtain(dsname,volume,work);
Try
call_obtain(XCICS.EILEEN.PDSE, CICH92);
and remove the stuff above...
Bye,
Michael
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Re: C/C++ Calling OBTAIN / IGC0002G
But when I compile, the C compiler is looking for the OBTAIN symbol. Where do I need to put the asm routine to be found by the compiler? -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@bama.ua.edu with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
Re: C/C++ Calling OBTAIN / IGC0002G
But when I compile, the C compiler is looking for the OBTAIN symbol. Where do I need to put the asm routine to be found by the compiler? Assuming the assembler code is in file obtain.s and your C++ code is in file mainprog.c then c++ -o mainprog mainprog.C obtain.s will invoke the C/C++ compiler to compile mainprog.C into mainprog.o, will then invoke the assembler to assemble obtain.s into obtain.o and will finally link mainprog.o and obtain.o into load module mainprog. Out of curiosity: What do you want to accomplish reading DSCBs? -- Peter Hunkeler CREDIT SUISSE -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@bama.ua.edu with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
Re: C/C++ Calling OBTAIN / IGC0002G
Thanks. It worked. I'm trying to reproduce the output of ftp's ls command Best regards, Cristi Terpea -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@bama.ua.edu with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
Re: C/C++ Calling OBTAIN / IGC0002G
Thanks for the code. It worked like a charm. Best regards, Cristi Terpea -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@bama.ua.edu with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
Re: C/C++ Calling OBTAIN / IGC0002G
Cristi - You might want to use our free catsearch command, which is included with the Co:Z toolkit. It combines IGGCSI00 (catalog search) with reading the dataset DSCBs. For example: /home/g1java1 catsearch -l g1java1.private.cookbook.** Volume Referred Ext TracksUsed Recfm Lrecl BlkSz Dsorg Dsname PRV002 2009/04/19 1 150 2 VB1020 27920 PO G1JAVA1.PRIVATE.COOKBOOK.COBADATA PRV001 2009/04/20 1 150 1 FB 80 6160 PO G1JAVA1.PRIVATE.COOKBOOK.COBOL VS G1JAVA1.PRIVATE.COOKBOOK.INVEN.KSDS PRV001 2009/04/19 1 15 ? U0 0 VS G1JAVA1.PRIVATE.COOKBOOK.INVEN.KSDS.DATA PRV001 1 15 ? U0 0 VS G1JAVA1.PRIVATE.COOKBOOK.INVEN.KSDS.INDEX VS G1JAVA1.PRIVATE.COOKBOOK.INVHIST.ESDS PRV002 2009/04/19 1 15 ? U0 0 VS G1JAVA1.PRIVATE.COOKBOOK.INVHIST.ESDS.DATA VS G1JAVA1.PRIVATE.COOKBOOK.INVHIST.AIX PRV003 2009/04/19 1 15 ? U0 0 VS G1JAVA1.PRIVATE.COOKBOOK.INVHIST.AIX.DATA PRV003 1 15 ? U0 0 VS G1JAVA1.PRIVATE.COOKBOOK.INVHIST.AIX.INDEX VS G1JAVA1.PRIVATE.COOKBOOK.INVHIST.PATH PRV002 2009/04/20 1 150 2 FB 80 6160 PO G1JAVA1.PRIVATE.COOKBOOK.JCL PRV001 2009/04/19 1 15 1 VB 166 6144 PS G1JAVA1.PRIVATE.COOKBOOK.TRANSREC There is also a -t option, which causes the output to be formatted with tab delimiters between each field, which is easy to parse from a calling program or shell script. For more information: http://dovetail.com/docs/coz/dsp-ref_catsearch.html Kirk Wolf Dovetailed Technologies On Thu, May 14, 2009 at 3:16 AM, Cristi Terpea cristi.ter...@fortech.ro wrote: Thanks. It worked. I'm trying to reproduce the output of ftp's ls command Best regards, Cristi Terpea -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@bama.ua.edu with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@bama.ua.edu with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
Re: C/C++ Calling OBTAIN / IGC0002G
On Thu, 14 May 2009 08:59:46 -0500, Kirk Wolf k...@dovetail.com wrote: Cristi - You might want to use our free catsearch command, which is included with the Co:Z toolkit. It combines IGGCSI00 (catalog search) with reading the dataset DSCBs. For example: /home/g1java1 catsearch -l g1java1.private.cookbook.** Kirk, Have you considered a companion command, perhaps called dasdlist, which would output the same type of information, but you give it a volume name or volume name pattern instead of a catalog name? dasdlist -v TSO* would list all the datasets on all on-line volumes which start with TSO... . Just a weird idea. -- John -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@bama.ua.edu with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
Re: C/C++ Calling OBTAIN / IGC0002G
i tried to use the assembler code given in a previous post and got about the same 0c4 abend i got using OBTAIN in c. can you give me a copy of the assembler code that worked. the code i used started with: * R0 EQU 0 R1 EQU 1 R2 EQU 2 R3 EQU 3 R4 EQU 4PARMS R5 EQU 5 R6 EQU 6 R7 EQU 7 R8 EQU 8 R9 EQU 9 R10 EQU 10 R11 EQU 11 BASE R12 EQU 12 LE/370 COMMON ANCHOR AREA (CAA) R13 EQU 13 LE/370 DYNAMIC SAVE AREA (DSA) thanks -Original Message- From: IBM Mainframe Discussion List [mailto:ibm-m...@bama.ua.edu] On Behalf Of Cristi Terpea Sent: Thursday, May 14, 2009 4:20 AM To: IBM-MAIN@bama.ua.edu Subject: Re: C/C++ Calling OBTAIN / IGC0002G Thanks for the code. It worked like a charm. Best regards, Cristi Terpea -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@bama.ua.edu with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@bama.ua.edu with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
Re: C/C++ Calling OBTAIN / IGC0002G
John, We haven't, but it sounds like a good idea. On Thu, May 14, 2009 at 9:16 AM, John McKown joa...@swbell.net wrote: On Thu, 14 May 2009 08:59:46 -0500, Kirk Wolf k...@dovetail.com wrote: Cristi - You might want to use our free catsearch command, which is included with the Co:Z toolkit. It combines IGGCSI00 (catalog search) with reading the dataset DSCBs. For example: /home/g1java1 catsearch -l g1java1.private.cookbook.** Kirk, Have you considered a companion command, perhaps called dasdlist, which would output the same type of information, but you give it a volume name or volume name pattern instead of a catalog name? dasdlist -v TSO* would list all the datasets on all on-line volumes which start with TSO... . Just a weird idea. -- John -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@bama.ua.edu with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@bama.ua.edu with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
C/C++ Calling OBTAIN / IGC0002G
I'm trying to call OBTAIN by fetching IGC0002G and executing but keep
getting errors.
This is the code I'm using:
int main (int argc, char *argv[]) {
typedef int OBTAIN(char* ,char*, char*);
#pragma linkage(OBTAIN, OS)
OBTAIN *OBTAIN_FN;
char dsname[44], volume[6];
char search_work_area[140];
int rc = -1;
memset(dsname,' ',44);
memcpy(dsname, IBMUSER.TESTUP, 14);
memset(volume,' ', 6);
memcpy(volume, S6SYS1, 6);
memset(search_work_area, 0, 140);
OBTAIN_FN = (OBTAIN *) fetch(IGC0002G);
printf(Fetched %x\n, OBTAIN_FN);
rc = OBTAIN_FN(dsname, volume, search_work_area);
printf(Result: %d\n, rc);
return 0;
}
Fetched 1163fd00
Segmentation fault
and the error I'm getting:
CEE3204S The system detected a protection exception (System Completion
Code=0C4).
From entry point main at compile unit offset +0150 at entry
offset +0150 at address 11608A68.
CEE3204S The system detected a protection exception (System Completion
Code=0C4).
From entry point main at compile unit offset +0150 at entry
offset +0150 at address 11608A68.
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Re: C/C++ Calling OBTAIN / IGC0002G
Hi
I think you got this not in OBTAIN , but memcpy as dsname already a pointer.
If I correct this:
- I got the Fetched message
- a S0C2 i(priv op exception) in OBTAIN
Cristi Terpea wrote:
I'm trying to call OBTAIN by fetching IGC0002G and executing but keep
getting errors.
This is the code I'm using:
int main (int argc, char *argv[]) {
typedef int OBTAIN(char* ,char*, char*);
#pragma linkage(OBTAIN, OS)
OBTAIN *OBTAIN_FN;
char dsname[44], volume[6];
char search_work_area[140];
int rc = -1;
memset(dsname,' ',44);
memcpy(dsname, IBMUSER.TESTUP, 14);
memset(volume,' ', 6);
memcpy(volume, S6SYS1, 6);
memset(search_work_area, 0, 140);
OBTAIN_FN = (OBTAIN *) fetch(IGC0002G);
printf(Fetched %x\n, OBTAIN_FN);
rc = OBTAIN_FN(dsname, volume, search_work_area);
printf(Result: %d\n, rc);
return 0;
}
Fetched 1163fd00
Segmentation fault
and the error I'm getting:
CEE3204S The system detected a protection exception (System Completion
Code=0C4).
From entry point main at compile unit offset +0150 at entry
offset +0150 at address 11608A68.
CEE3204S The system detected a protection exception (System Completion
Code=0C4).
From entry point main at compile unit offset +0150 at entry
offset +0150 at address 11608A68.
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Re: C/C++ Calling OBTAIN / IGC0002G
That's an SVC routine which can only be invoked using an SVC machine instruction. You can't CALL it. -- Peter Hunkeler CREDIT SUISSE -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@bama.ua.edu with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
Re: C/C++ Calling OBTAIN / IGC0002G
On Wed, 13 May 2009 05:17:54 -0500 Cristi Terpea cristi.ter...@fortech.ro
wrote:
:I'm trying to call OBTAIN by fetching IGC0002G and executing but keep
:getting errors.
:This is the code I'm using:
:
:int main (int argc, char *argv[]) {
:
:typedef int OBTAIN(char* ,char*, char*);
:#pragma linkage(OBTAIN, OS)
:OBTAIN *OBTAIN_FN;
:char dsname[44], volume[6];
:char search_work_area[140];
:int rc = -1;
:
:memset(dsname,' ',44);
:memcpy(dsname, IBMUSER.TESTUP, 14);
:memset(volume,' ', 6);
:memcpy(volume, S6SYS1, 6);
:memset(search_work_area, 0, 140);
:
:OBTAIN_FN = (OBTAIN *) fetch(IGC0002G);
:printf(Fetched %x\n, OBTAIN_FN);
:rc = OBTAIN_FN(dsname, volume, search_work_area);
:
:printf(Result: %d\n, rc);
:return 0;
:}
:
:Fetched 1163fd00
:Segmentation fault
:
:and the error I'm getting:
:
:CEE3204S The system detected a protection exception (System Completion
:Code=0C4).
: From entry point main at compile unit offset +0150 at entry
:offset +0150 at address 11608A68.
:CEE3204S The system detected a protection exception (System Completion
:Code=0C4).
: From entry point main at compile unit offset +0150 at entry
:offset +0150 at address 11608A68.
Not at all an expert on C, but OBTAIN cannot be called directly. It must be
invoked via an SVC instruction.
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Re: C/C++ Calling OBTAIN / IGC0002G
I tried using assembly code (
https://ls2.cmich.edu/cgi-bin/wa?A2=ind9806L=C370-LP=968 ) to call it but
still I get a protection exception.
I tested with:
void main() {
SVC_REGISTER *r15 = NULL, *r00 = NULL, *r01;
char dsname[44] = IBMUSER.TESTUP;
char volume[6] = S6SYS1;
r01 = malloc(16);
memset(r01, 0, 16);
memcpy(r01, \xc1\x00, 2);
r01 += 4;
r01 = (unsigned int*)dsname;
r01 += 4;
r01 = (unsigned int*)volume;
r01 += 4;
r01 = malloc(140);
CCasvc(27, r15, r00, r01);
}
What am I doing wrong?
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Re: C/C++ Calling OBTAIN / IGC0002G
On Wed, 13 May 2009 08:06:03 -0500, Cristi Terpea cristi.ter...@fortech.ro
wrote:
I tried using assembly code (
https://ls2.cmich.edu/cgi-bin/wa?A2=ind9806L=C370-LP=968 ) to call it but
still I get a protection exception.
I tested with:
void main() {
SVC_REGISTER *r15 = NULL, *r00 = NULL, *r01;
char dsname[44] = IBMUSER.TESTUP;
char volume[6] = S6SYS1;
r01 = malloc(16);
memset(r01, 0, 16);
memcpy(r01, \xc1\x00, 2);
r01 += 4;
r01 = (unsigned int*)dsname;
r01 += 4;
r01 = (unsigned int*)volume;
r01 += 4;
r01 = malloc(140);
CCasvc(27, r15, r00, r01);
}
What am I doing wrong?
I'm not completely sure, as I've never tried this in C/C++, but in part I
think your problem is that you've lost the original value of r01 (from that
malloc(16) call), which is what you need to pass to the OBTAIN SVC.
Why don't you simply call an assembler subroutine and have it do an OBTAIN?
Building SVC parameter lists by hand is both complex and very error-prone.
--
Walt Farrell, CISSP
IBM STSM, z/OS Security Design
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Re: C/C++ Calling OBTAIN / IGC0002G
Cristi Terpea schrieb:
What am I doing wrong?
I really don't know ;) But why don't you use a little ASM routine?
*
R0 EQU 0
R1 EQU 1
R2 EQU 2
R3 EQU 3
R4 EQU 4PARMS
R5 EQU 5
R6 EQU 6
R7 EQU 7
R8 EQU 8
R9 EQU 9
R10 EQU 10
R11 EQU 11 BASE
R12 EQU 12 LE/370 COMMON ANCHOR AREA (CAA)
R13 EQU 13 LE/370 DYNAMIC SAVE AREA (DSA)
R14 EQU 14
R15 EQU 15
*
PARM DSECT
PARM_FLG DSFFUNCTION-CODE HEX'C100'
PARM_DSN DSFADDR OF DSN (44 BYTES)
PARM_VOL DSFADDR OF VOLSER (6 BYTES)
PARM_WRK DSFADDR OF 140 BYTE WORK/RETURN-AREA
*
*
OBTAIN CEEENTRY PPA=MAINPPA, ADDR OF PROGRAM PROLOG AREA X
AUTO=WORKSIZE,SIZE OF DSECT (- SAVEAREA!) X
NAB=NO, NAB NOT USED X
MAIN=NO, NO MAINPROG X
EXPORT=NO,DONT EXPORT ENTRYPOINTX
BASE=R11 BASE
*
USING CEECAA,R12COMMON ANCHOR AREA
USING CEEDSA,R13DSA + LOCAL (DYNAM.) VARIABLES
*--
L R4,0(R1) LOAD ADDR OF PARMS
USING PARM,R4 ADDRESS PARMS
*
OBTAIN PARM INVOKE OBTAIN
STR15,RETCODE SAVE RC
*
CEETERM RC=RETCODE
*--
MAINPPA CEEPPA PROGRAM PROLOG AREA
LTORG
*--
CEEDSA DSECT: DYNAMIC SAVE AREA
RETCODE DS F RETURNCODE
DS 0D ENSURE ALIGNMENT!!!
WORKSIZE EQU *-CEEDSA
*--
CEECAA DSECT: COMMON ANCHOR AREA
CEEEDB DSECT: ENCLAVE DATA BLOCK
*--
So... now you can invoke OBTAIN from C by
int OBTAIN(unsigned long[]);
#pragma linkage(OBTAIN, OS)
#pragma pack(1) /* 1 byte alignment */
typedef struct
{
char Ds1FmtId;
char Ds1Dssn[6];
unsigned short Ds1VolSq;
char Ds1CreDt[3];
char Ds1ExpDt[3];
unsigned char Ds1NoEpv;
unsigned char Ds1NoBdb;
unsigned char Ds1Flag1;
char Ds1SysCd[13];
char Ds1RefDt[3];
unsigned char Ds1SmsFg;
unsigned char Ds1ScXft;
unsigned short Ds1ScXtv;
unsigned char Ds1DsOrg[2];
unsigned char Ds1RecFm;
unsigned char Ds1OptCd;
unsigned short Ds1BlkL;
unsigned short Ds1LrecL;
unsigned char Ds1KeyL;
unsigned short Ds1Rkp;
unsigned char Ds1DsInd;
unsigned char Ds1ScAl1;
unsigned char Ds1ScAl3[3];
unsigned char Ds1LstAr[3];
unsigned short Ds1TrBal;
unsigned char Reserved;
unsigned char Ds1Tthi;
unsigned char Ds1Ext1[10];
unsigned char Ds1Ext2[10];
unsigned char Ds1Ext3[10];
unsigned char Ds1PtrDs[5];
char Filler[44];
} DSCB;
#pragma pack() /* default alignment */
int call_obtain(char *Dsn, char *VolSer)
{
intRc;
unsigned long Parm[4];
char ParmDsn[44];
char ParmVolSer[6];
DSCB Dscb;
memset(ParmDsn, ' ', 44);
memcpy(ParmDsn, Dsn, strlen(Dsn));
memset(ParmVolSer, ' ', 6);
memcpy(ParmVolSer, VolSer, strlen(VolSer)); /should be 6 always!
Parm[0] = 0xC100;
Parm[1] = (unsigned long) ParmDsn;
Parm[2] = (unsigned long) ParmVolSer;
Parm[3] = (unsigned long) Dscb;
if((Rc = OBTAIN(Parm[0])) != 0)
return(Rc);
// do something with DSCB
return(0);
}
This is how it works for me in a multithreaded application written in C...
Bye,
Michael
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Re: C/C++ Calling OBTAIN / IGC0002G
I don't want to compile also the asm routine on the target machine. It would be great to have one executable (is it possible to link statically the asm object with the C object?). I also searched this area, but couldn't find an easy way to compile asm and how to link C and asm. -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@bama.ua.edu with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
Re: C/C++ Calling OBTAIN / IGC0002G
On Wed, 13 May 2009 10:09:40 -0500, Cristi Terpea cristi.ter...@fortech.ro wrote: I don't want to compile also the asm routine on the target machine. It would be great to have one executable (is it possible to link statically the asm object with the C object?). I also searched this area, but couldn't find an easy way to compile asm and how to link C and asm. You don't need to compile the assembler routine on the target machine, as far as I know. The assembler routine should be compatible with any release of the system. -- Walt -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@bama.ua.edu with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
Re: C/C++ Calling OBTAIN / IGC0002G
Cristi Terpea wrote: I don't want to compile also the asm routine on the target machine. It would be great to have one executable (is it possible to link statically the asm object with the C object?). I also searched this area, but couldn't find an easy way to compile asm and how to link C and asm. Yes, of course it is possible to link statically. Sounds like you could use our course Secrets of Inter-Language Communication in z/OS. Currently we have a 3.5 day version that includes DLLs. I'm thinking of creating a two-day version that would not include the DLL part. The current course covers four languages (Assembler, COBOL, PL/I, and C), although the students decide which languages to include in lecture and labs (this could actually be done with a single language). Anyway, the discussion covers, for all selected languages: * How to define elementary data items - classic fields - null terminated strings * How to define structures and arrays * Ways to access the JCL PARM value * Static calls and function references * Passing arguments (by reference, by value, by content) * Receiving parameters (by reference, by content) * How to code and check for optional parameters * Object code formats and the program binder * How to code and use alternate entry points * How to code and use shared external data * Dynamic calls * DLL calls and more! For details, see: http://www.trainersfriend.com/Language_Environment_courses/m520descr.htm this page includes links to even more details: course objectives, and detailed topical outline I see from your email address you are in Romania. We would love to come and teach there! If that's of interest, contact me off list. Kind regards, -Steve Comstock The Trainer's Friend, Inc. 303-393-8716 http://www.trainersfriend.com z/OS Application development made easier * Our classes include + How things work + Programming examples with realistic applications + Starter / skeleton code + Complete working programs + Useful utilities and subroutines + Tips and techniques == Check out the Trainer's Friend Store to purchase z/OS == == application developer toolkits. Sample code in four== == programming languages, JCL to Assemble or compile, == == bind and test. == == http://www.trainersfriend.com/TTFStore/index.html== -- For IBM-MAIN subscribe / signoff / archive access instructions, send email to lists...@bama.ua.edu with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
