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Running assembler language code from the OMVS shell

The Assembler Callable Services publication describes the assembler interface to Unix System Services. You can assemble and link an assembler program from the shell using c89. For example,
c89 -o mylmod -e MYENTRY mymod.s
Here, mymod.s contains the source (.s means use the assembler). -o specifies the output executable file name and -e specifies the entry point. The program needs to be coded as reentrant.

Parameters

On entry, the program parameter list consists of the following full word values: All arguments and envrionment variable strings include a terminating null character.

Dumps

You can request a dump by specifying a value for the _BPXK_MDUMP environment variable. The dump will be written to the specified MVS data set or HFS file.

You can also request a dump by allocating a data set to file SYSMDUMP. If the abend happens in the same address space as this allocation, then the dump will be written to that file. Otherwise, a dump will be created in the user's working directory named coredump.pid, where pid is the process ID for the process being dumped.This file will be in the same format as a SYSMDUMP.

To process an HFS dump file with IPCS, you can copy it into an MVS data set with a LRECL of 4160 using a TSO/E OGET command. You can also allocate the file directly using its PATHNAME and use the FILE option from IPCS to access it.

See the main OMVS page here for more links to more information about OMVS.
Big Iron