Linking Eric McCreath Introduction One of the key resources that - - PowerPoint PPT Presentation

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Linking Eric McCreath Introduction One of the key resources that - - PowerPoint PPT Presentation

Sep 27, 2022 644 likes •738 views

Linking Eric McCreath Introduction One of the key resources that an operating system is called upon to manage is main (primary) memory. Generally a programer does not have to worry about which particular addresses are used for their programs.

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Eric McCreath

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Introduction

One of the key resources that an operating system is called upon to manage is main (primary) memory. Generally a programer does not have to worry about which particular addresses are used for their programs. The compiler/OS does this for you. However, it is good to gain a basic understanding of how all these addresses are put together.

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Address Binding

For a program to execute it must be copied into main memory at a particular location. Many instructions use 'fixed' addresses which must be bound to 'fixed' locations in the memory. This binding of instructions and data to memory addresses may

  • ccur at :

compile time, load time, or execution time.

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Linking Loading

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Memory Layout

from COMP2300 2010 slides

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ELF

from 2010 COMP2300 slides

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Libraries

Libraries may be either: statically linked - the library is compiled into the final binary executable. dynamically linked - just a 'stub' is includes in the binary executable, the library code is obtained as needed during execution.