[SunRescue] Re: [SunRescue]Tiny executables

[rescue at sunhelp.org]

n2vip at bellatlantic.net writes:

>In the Mainframe operating systems, starting with OS/360 back in th
>emid-sixties, they had utility called IEFBR14.

>IEFBR14 was, simply, a Branch and Return, Register 14 instruction (aprox. 4
>bytes wide, IIRC the IBM 360 was 32-36 bit processor). Again, it's purpose
>was to provide an execution "stub" to give the OS a cahnce to do some file
>maint.

>Later, the program *ballooned* to two instructions - an instruction was
>added to set the return register to zero, *then* Branch and Return, based on
>the value in register 14.

>It is/was an extremely powerful utility for a mainframe JCL coder.

Wasn't it at some point found to have a bug?

-- david fischer -- dave at cca.org -- www.cca.org -- Cthulhu told me to. --