Comp&Decompilation process, RP3 & ILE RPG

[Francesco Scafi <fscafi@xxxxxx>]

Hi all,
I repost a part of messeges that I have sended in 1996 at midrange-l list.
What thought of it?

My question is: What is the process for ILE RPG?

------------------------

The compilation process consist in two phases:
The translation in IRP and the compilation in vertical and horizontal 
internal code (CRTPG).

If you compile a rpg pgm with the option *list, *xref, *atr, *dump
in output you have a listing with some tables: 
- the MI intermediate rapresentation process with the 
  microinstruction. For each group of MI instruction correspond 
  one line of RPG C Specification.
- one table represent the name of variables and the name of branch tags
  and where are used. For retrive the variables the process is 
  very complex.

If you use the STRSST comand on this pgm you have a listing with
the further translation of each MI instruction in assembler code.
 Option start a service tool,
 Display/alter/dump
 Dump to printer
 MI object
 Program(02)
 Option 1
 Insert the name of pgm and insert into context the library of pgm
 Format disassembled code
STRSST print the disassembly of program object

For each group of IMPI instruction correspond one MI
instruction. If you see on the rigth of each IMPI Instr. 
you find the HEX number of the MI instruction represented into 
RPG compilation!

Merging the informations of this two listing is possible 
the de-compilation...



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