The Disassembler produces assembler language source statements
and a pseudo-listing using object code as input. You can use the Assembler
Language source file and listing for purposes such as program understanding,
debugging, and recovery of lost source code.
ASMDASM is a two-pass disassembler which produces an assembler
language source program from a CSECT within any of the following:
- z/OS
- An object module, a program object, or a load module.
- CMS
- An object deck, or a CMS Module.
- z/VSE
- An object module, or a phase.
Control statements permit specification of areas containing instructions
or data or uninitialized data areas, provide base registers so that
symbolic labels are created during disassembly, and define the DSECTs
used during disassembly.
Registers are denoted thus:
- Access Registers are denoted by A0, A1,...A15.
- Control Registers are denoted by C0, C1,...C15.
- Floating Point Registers are denoted by F0, F1,...F15.
- General Purpose Registers are denoted by R0, R1,...R15.
- Vector Registers are denoted by V0, V1,...V15.
The Disassembler provides informational comments for recognized
SVCs, and for various branch instructions to aid in creating a documented
source program.
A warning about copyright: When you use this utility you
must be aware of and respect the intellectual property rights of others.
You are not authorized to use this utility to disassemble, copy, or
create assembly listings or disassembled Assembler Language source
code in violation of any contractual or other legal obligation. You
are authorized to use this utility only for object code for which
you have verified you have the right to perform disassembly.
The
Disassembler normally scans the object code for special strings. If
any of these are found, then the Disassembler issues message ASMD010
and the disassembly stops.
The Disassembler searches for the
these special strings:
- (c)
- (C)
- © at code point X'B4'
- "Copyright" in any combination of uppercase and lowercase letters.