HLASM Language Reference

CSECT Instruction
COPY
A
and library member A contains the statement:
COPY B
In this case, the library member B must not contain a COPY A or COPY B
statement.
Can contain macro definitions. Note, however, that if a source macro definition
is copied into a source module, both the MACRO and MEND statements that
delimit the definition must be contained in the same level of copied code.
Notes:
1. The COPY instruction can also be used to copy statements into source macro
definitions.
2. The rules that govern the occurrence of assembler language statements in a
source module also govern the statements copied into the source module.
3. Whenever the assembler processes a COPY statement, whether it is in open
code or in a macro definition, the assembler attempts to read the source
language library member specified in the COPY statement. This means that all
source language library members specified by COPY statements in a source
program, including those specified in macro definitions, must be available
during the assembly. The HLASM Programmer's Guide describes how to
specify the libraries when you run the assembler.
4. If an END instruction is encountered in a member during COPY processing, the
assembly is ended. Any remaining statements in the COPY member are
discarded.
CSECT Instruction
The CSECT instruction initiates an executable control section or indicates the
continuation of an executable control section.
►►──┬────────┬──CSECT──────────────────────────────────────────────►◄
└─symbol─┘
symbol
is one of the following:
An ordinary symbol
A variable symbol that has been assigned a character string with a value
that is valid for an ordinary symbol
A sequence symbol
The CSECT instruction can be used anywhere in a source module after any ICTL
or *PROCESS statements. If it is used to initiate the first executable control
section, it must not be preceded by any instruction that affects the location counter
and thereby causes a control section to be initiated.
If symbol denotes an ordinary symbol, the ordinary symbol identifies the control
section. If several CSECT instructions within a source module have the same
Chapter 5. Assembler Instruction Statements 123