HLASM Language Reference
HLASM Language Reference HLASM Language Reference
EXITCTL Instruction sequence_symbol is a sequence symbol. exit_type identifies the type of exit to which this EXITCTL instruction applies. Exit_type must have one of the following values: SOURCE Sets the exit-control parameters for the user-supplied exit module specified in the INEXIT suboption of the EXIT assembler option. LIBRARY Sets the exit-control parameters for the user-supplied exit module specified in the LIBEXIT suboption of the EXIT assembler option. LISTING Sets the exit-control parameters for the user-supplied exit module specified in the PRTEXIT suboption of the EXIT assembler option. PUNCH Sets the exit-control parameters for the user-supplied exit module specified in the OBJEXIT suboption of the EXIT assembler option when it is called to process the object module records generated when the DECK assembler option is specified. OBJECT (MVS and CMS) Sets the exit-control parameters for the user-supplied exit module specified in the OBJEXIT suboption of the EXIT assembler option when it is called to process the object module records generated when the OBJECT or GOFF assembler option is specified. ADATA Sets the exit-control parameters for the user-supplied exit module specified in the ADEXIT suboption of the EXIT assembler option. TERM Sets the exit-control parameters for the user-supplied exit module specified in the TRMEXIT suboption of the EXIT assembler option. control_value is the value to which the corresponding exit-control parameter should be set. For each exit type, the assembler maintains four exit-control parameters known as EXITCTL_1, EXITCTL_2, EXITCTL_3, and EXITCTL_4. Therefore, up to four values may be specified. Which exit-control parameter is set is determined by the position of the value in the operand of the instruction. You must code a comma in the operand for each omitted value. If specified, control_value must be either: A decimal self-defining term with a value in the range −2 31 to +2 31 −1. An expression in the form ±n, where is the current value of the corresponding exit-control parameter to which n, a decimal self-defining term, is added or from which n is subtracted. The value of the result of adding n to or subtracting n from the current exit-control parameter value must be in the range −2 31 to +2 31 −1. If control_value is omitted, the corresponding exit-control parameter retains its current value. The following example shows how to set the exit-control parameters EXITCTL_1 and EXITCTL_3 for the LISTING exit without affecting the contents of the other exit-control parameters: EXITCTL LISTING,256,,+128 See the HLASM Programmer's Guide for information about how EXITCTL values are passed to each type of exit. The assembler initializes all exit-control parameters to binary zeros. 188 HLASM V1R5 Language Reference
EXTRN Instruction EXTRN Instruction The EXTRN instruction identifies symbols referred to in a source module but defined in another source module. These symbols are external symbols. ┌─,───────────────┐ ►►──┬─────────────────┬──EXTRN─── ▼ ─external_symbol─┴────────────────►◄ └─sequence_symbol─┘ sequence_symbol is a sequence symbol. external_symbol is a relocatable symbol that: Is a valid symbol Is not used as the name entry of a source statement in the source module in which it is defined Up to 65535 individual control sections, external symbols, and external dummy sections can be defined in a source module. However, the practical maximum number depends on the amount of table storage available during link-editing. The assembler lists each external symbol identified in a source module in the external symbol dictionary, along with entries for entry symbols, common control sections, parts, and external control sections. External symbols have a length attribute of 1. See also “WXTRN Instruction” on page 229. ICTL Instruction The ICTL instruction changes the begin, end, and continue columns that establish the coding format of the assembler language source statements. ►►──ICTL──begin──┬─────────────────────┬───────────────────────────►◄ └─,end─┬───────────┬──┘ └─,continue─┘ begin specifies the begin column of the source statement. It must be a decimal self-defining term within the range of 1 to 40, inclusive. end specifies the end column of the source statement. When end is specified it must be a decimal self-defining term within the range of 41 to 80, inclusive. It must be not less than begin +5, and must be greater than continue. If end is not specified, it is assumed to be 71. continue specifies the continue column of the source statement. When specified, continue must be a decimal self-defining term within the range of 2 to 40, and it Chapter 5. Assembler Instruction Statements 189
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EXITCTL Instruction<br />
sequence_symbol<br />
is a sequence symbol.<br />
exit_type<br />
identifies the type of exit to which this EXITCTL instruction applies. Exit_type<br />
must have one of the following values:<br />
SOURCE Sets the exit-control parameters for the user-supplied exit module<br />
specified in the INEXIT suboption of the EXIT assembler option.<br />
LIBRARY Sets the exit-control parameters for the user-supplied exit module<br />
specified in the LIBEXIT suboption of the EXIT assembler option.<br />
LISTING Sets the exit-control parameters for the user-supplied exit module<br />
specified in the PRTEXIT suboption of the EXIT assembler option.<br />
PUNCH Sets the exit-control parameters for the user-supplied exit module<br />
specified in the OBJEXIT suboption of the EXIT assembler option<br />
when it is called to process the object module records generated<br />
when the DECK assembler option is specified.<br />
OBJECT (MVS and CMS)<br />
Sets the exit-control parameters for the user-supplied exit module<br />
specified in the OBJEXIT suboption of the EXIT assembler option<br />
when it is called to process the object module records generated<br />
when the OBJECT or GOFF assembler option is specified.<br />
ADATA Sets the exit-control parameters for the user-supplied exit module<br />
specified in the ADEXIT suboption of the EXIT assembler option.<br />
TERM Sets the exit-control parameters for the user-supplied exit module<br />
specified in the TRMEXIT suboption of the EXIT assembler option.<br />
control_value<br />
is the value to which the corresponding exit-control parameter should be set.<br />
For each exit type, the assembler maintains four exit-control parameters known<br />
as EXITCTL_1, EXITCTL_2, EXITCTL_3, and EXITCTL_4. Therefore, up to<br />
four values may be specified. Which exit-control parameter is set is determined<br />
by the position of the value in the operand of the instruction. You must code a<br />
comma in the operand for each omitted value. If specified, control_value must<br />
be either:<br />
A decimal self-defining term with a value in the range −2 31 to +2 31 −1.<br />
An expression in the form ±n, where is the current value of the<br />
corresponding exit-control parameter to which n, a decimal self-defining<br />
term, is added or from which n is subtracted. The value of the result of<br />
adding n to or subtracting n from the current exit-control parameter value<br />
must be in the range −2 31 to +2 31 −1.<br />
If control_value is omitted, the corresponding exit-control parameter retains its<br />
current value.<br />
The following example shows how to set the exit-control parameters EXITCTL_1<br />
and EXITCTL_3 for the LISTING exit without affecting the contents of the other<br />
exit-control parameters:<br />
EXITCTL LISTING,256,,+128<br />
See the <strong>HLASM</strong> Programmer's Guide for information about how EXITCTL values<br />
are passed to each type of exit.<br />
The assembler initializes all exit-control parameters to binary zeros.<br />
188 <strong>HLASM</strong> V1R5 <strong>Language</strong> <strong>Reference</strong>
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