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Pankaj Shrivastava
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Joined: 24 Jul 2009
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Hi ,
Can we define an instruction within a DSECT , Like
ABC DSECT
SR R,R |
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Bill O'Boyle
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Location: Atlanta, Georgia, USA
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A DSECT is referred to as a "DUMMY SECTION" and takes up no storage until addressability has been established. After that, you can issue instructions related to this DSECT.
IE: ABC DSECT
USING *,Rx INFORM ASSEMBLER
Rx (x usually represents 2-12) is the register which contains the storage-address which maps to the DSECT. Unless you know what you're doing, stay away from R0, R1, R13, R14 and R15 as a DSECT base-register.
A COBOL LINKAGE SECTION "01" level is similar to a DSECT, for example, like DFHCOMMAREA in CICS.
COBOL automatically maps the storage (establishes addressability) to DFHCOMMAREA when EIBCALEN is greater than ZERO.
Otherwise, there's no addressability.
Bill |
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Pankaj Shrivastava
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Location: Pune
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| Thx Bill for explaining in detail . |
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Robert Sample
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Location: Dubuque, Iowa, USA
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One of the notes in the HLASM Language Reference manual on DSECT specifically states
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| 1. The assembler language statements that appear in a dummy section are not assembled into object code. |
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