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Status: Tags: Links: ) CMPT 295 - Introduction to Computer Systems

CMPT 295 Course Outline

• Von Neumann Architecture
• Data Representation
• Shannon’s master thesis
  • Claude Shannon applied boolean algebra onto design and anlysis of digital systems/circuits

Machine Level Programming

• x86-64 Assembly
• Central Processing Unit (CPU)
• Caller vs Callee

Makefile Syntax

• gcc -E main.c > main.i
  • implements include files into program
  • E
  • S is assembly
  • g allows to use debugger
  • Wall is show all warnings
  • c converts assembly to object file
  • o is executable
  • ss some store

Questions

How does c program become stored in memory?

• Loader

How is c program executed by microprocessor?

• Converting C code to Assembly

• First it looks at %rip to see what instruction needs to be called

• Run function, then increment PC

• Have visuals for each register to help with hand tracing

Steps of call instruction

• When callq, add return address (%rip) to stack to return later

• %rip is set to callq, runs the new called function

• When coming across a ret, it grabs from stack and puts into %rip

• When calling a function inside a function, its return value will be stored in %rax

Backlinks

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list from CMPT 295 Course Outline AND !outgoing(CMPT 295 Course Outline)

References:

Created:: 2022-01-10 14:42