SYSTEMS SOFTWARE

UNIT-I:

1.1 Language Processors: Introduction, Language Processing Activities, Fundamentals of Language Processing & Language Specification, Language Processor Development Tools.

1.2 Data Structures for Language Processing: Search Data structures, Allocation Data Structures.

1.3 Scanning & Parsing.

Ref: DMD: Chapter 1, 2 & 3.

UNIT-II:

2.1 Assemblers: Elements of Assembly Language Programming, A Simple Assembly Scheme, Pass Structure of Assemblers, Design of a Two Pass Assembler, A single pass Assembler for IBM PC.

2.2 Macros and Macro Processors: Macro Definition and Call, Macro Expansion, Nested Macro Calls, Advanced Macro Facilities, Design of a Macro Preprocessor.

2.3 Linkers: Relocation and Linking Concepts, Design of a Linker, Self-Relocating Programs, A Linker for MS-DOS, Linking for Overlays, Loaders.

2.4 Software Tools: Software Tools for Program Development, Editors, Debug Monitors, Programming Environments, and User Interfaces.

Ref: DMD: Chapters 4, 5, 7 & 8.

UNIT-III:

Compilers:

3.1 Statement of Problem: Recognizing Basic Elements, Recognizing Syntactic Units and Interpreting Meaning, Intermediate form, Arithmetic statements, Non-Arithmetic statements, Non-executable statements, Storage Allocation, Code Generation, Optimisation (Machine-independent), Optimisation (Machine Dependent), Assembly Phase, General Model of the Compiler.

3.2 Phases of the Compiler: Lexical Phase, Syntax Phase, Interpretation Phase, Optimisation, Storage Assignment, Code Generation, Assembly Phase, Passes of the Compiler.

3.3 Data structures: Introduction, Implementation, Recursion, Call & Return Statements, Storage Classes, Static, Automatic, External Control & Based Storage. Implementation, Block structure, Non-local Go To’s, Interrupts, Pointers.

3.4 Interpreters: Use & Overview, Pure & Impure Interpreters

Ref: For Compilers: JD: Chapter 8. Additional Ref: DMD: Chapter 6.
Ref: for Interpreters: DMD: Chapter 6.

Main References:

DMD: Systems Programming & OS by D.M.DHAMDHERE (2nd Revised Edition) TMH.

JD: Systems Programming by John Donovan TMH.

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  1. KSHAMA
    February 7th, 2010 at 06:54 | #1

    explain the effect of following pseudo opcods on forward and backward referencing
    1. START 2. ORIGIN 3. LTORG 4.DC 5. DS

  2. kshama
    February 7th, 2010 at 08:45 | #2

    why do we need multiple passes? how to restrict no of passes? can we have n-pass of assembler ?

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