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Chapter 9

Chapter 9. TRAP Routines Subroutines Privileged Instructions TRAP Routines. Subroutines. Used for Frequently executed code segments: written only once. Hides the implementation details. Passing of parameters and return values, in registers or memory.

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CHAPTER 9 TRAP ROUTINES AND SUBROUTINES

CHAPTER 9 TRAP ROUTINES AND SUBROUTINES. The TRAP mechanism allows the user program to request the operating system to perform certain tasks on behalf of the user program. The request made by the user program is often referred to as a service call or a system call.

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Trap routines - PowerPoint PPT Presentation

Chapter 9

CHAPTER 9 TRAP ROUTINES AND SUBROUTINES