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System Calls in Linux:
- Essentially - slow interrupt number 0x80!
- Load CPU Registers:
- System Call ID#
- Arguments to System Call
- Generate an interrupt 0x80 (int $0x80 assember instruction)
- ISR for 0x80 determines which kernel function to call from the ID#.
- Results:
- Returned in CPU Registers
- Shown in effects to kernel data structures.