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NetApp Interview Question for Software Engineer / Developers


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each system call is given a unique no., which is passed to the kernel when the system call is made. the parameters are passed on to the register. kernel maintains a vector for the system calls , and invokes the corresponding function in the vector.

- Anonymous April 26, 2010 | Flag Reply
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using interrupts 'int' instruction on x86, requires a IDT walk to get address of interrupt routine which further serves the system call depending upon the parameters passed in registers.
Fast system calls using sysenter and sysexit

- svs February 03, 2011 | Flag Reply
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Whenever a system call is invoked the 0x80 sw interrupt is invoked.The control is transferred from userspace to kernel along with the sys call number. The kernel uses this number as an index to the syscall table and invokes the corresponding function.

- Surjit May 16, 2013 | Flag Reply


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