What is symbol table in assembler?

Answer Posted / bala

assembler maintains a table where Entry address for all lables being declared in the program. In below, symbol table will have details like "Para-1 000A", "VAR-1 ----" and so on. Address(entry point) for MVC instruction will not have its entry in symbol tabel as it does not have any label to be referred.. Still Location counter used to maintain address for each instruction. Here Location counter will have address of MVC as '000A' and its length of instruction. Here Para-1 address and MVC address is same as 0H does not reserve storage.

For example, Para-1 address is at X'000A'.

para-1 DS 0H
MVC VAR-1,VAR-2
---
--
VAR-1 CL4
VAR-2 CL4

Is This Answer Correct ?    0 Yes 0 No



Post New Answer       View All Answers


Please Help Members By Posting Answers For Below Questions

What is the use of trt instruction?

584


Explain the difference in data type "x" and "p"?

597


What does "using" do?

594


What is need of start 0? In steed of can we use anyother numerics? If we use what will happen?

644


How are data passed from jcl parm to assembler program?

583






What is house keeping in assembler?

593


In the house keeping section of an MVS assembly language program, like the one below STM R14,R12,12(R13) BASR R12,R0 USING *,R12,R11 LA R11,2048 LA R11,2048(R11,R12) .... .... 1. What if BASR R12,R0 IS NOT PRECEDE USING *,R12,R11? 2. USING (base address), REGISTER does USING directive says assembler to treat particular Register as a base register with the mentioned base address..in the above case * i.e current location counter..well if that is the case why we need BASR R12,R0 ? 3. What if I write like STM R14,R12,12(R13) BASR R12,R0 LA R11,2048 LA R11,2048(R11,R12) USING *,R12,R11 there is no address resolution being calculated in both LA statements so is it a right way to set Base register?..will there be any issues with Domain regarding R11 and R12?

1531


Explain how to pass instream data in sysin with assembler?

648


What is maximum displacement and how to cross this limit?

674


How to pass the parameters from jcl to assembler program?

576


how to initialize a register to 0000?

667


Explain about base register?

608


explain about maximum displacement and how to cross this limit?

701


How do you round the addition or subtraction of two numbers in assembler?

604


What is need of start 0?

659