20. Example Scenario of `fork()` ExecutionUsing a simple C program that calls `fork()`, explain the sequence of events that occurs from the parent process calling `fork()` to both the parent and chil…
19. Returning to User ModeDescribe the process by which the kernel returns control to user mode after setting up the child process context during `fork()`. What specific adjustments are made?
17. System Call Entry and HandlingOutline the steps that occur when the `fork()` system call is invoked, focusing on the transition from user mode to kernel mode.
16. Initialization of `task_struct`What is the `task_struct`, and what role does it play in process management? How is it initialized for the child process during `fork()`?
15. Handling Special RegistersHow does the kernel manage special registers (e.g., FPU, SIMD) when setting up the child process context during `fork()`? Why is this important?
14. Stack Pointer InitializationDescribe how the stack pointer (SP) is handled during the `fork()` system call. Why is it crucial for maintaining process execution context?
12. Return Values of `fork()`Explain how the return values of `fork()` differ for the parent and child processes. Why is this differentiation important?
11. Process Context DuplicationWhat elements constitute the context of a process in Linux, and how does the kernel duplicate this context for the child process during the `fork()` system call?
10. Close-on-Exec Flags ManagementExplain the `FD_CLOEXEC` flag. How does the kernel manage this flag for file descriptors during the `fork()` operation?
8. File Descriptor Table (`files_struct`)What is the `files_struct` in the context of the `fork()` system call? What are the key fields in this structure?
7. Consistency in File OperationsHow does sharing the `file` structure and managing reference counts ensure consistency in file operations between the parent and child processes?
6. Reference Count ManagementWhy does the kernel increment the reference count for each `file` structure during the `fork()` operation? How does this ensure proper resource management?
5. Duplicating File Descriptor TableWhen a process calls `fork()`, how does the kernel handle the duplication of the file descriptor table for the child process?
3. System-Wide File TableWhat is the file table, and how does it differ from the file descriptor table? What kind of information is stored in the file table?