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system_call / interrupt(2) [os week3 interrupt 이어서..] 7-1) sys_call_table[] is in arch/x86/kernel/syscall_table_32.S. How many system calls does Linux 2.6 support? 0부터 시작했으므로 linux 2.6이 제공하는 system calls는 총 326개이다. 7-2)What are the system call numbers for exit, fork, execve, wait4, read, write, and mkdir? 파일 내에서 "/찾고있는text"+enter를 통해 각 system call의 number를 찾는다. Role of sys_ni_syscall 7-3) Find s..

Lecture 4: Interrupt An operating system is a collection of service routines. The service routine can be executed by a request from an application (system call interrupt). Or it runs automatically when there is a serious error while running an application (exception interrupt) or when there is an external hardware event that the operating system has to handle (hardware interrupt). The service ro..

Lecture 3. pc hardware, execution cycle, boot sequence, grub boot loader, Kernel Compiling 1. pc hardware 1) computer 2) Intel x86 cpu registers: ax, bx, cx, dx, cs, ds, ss, es, sp, bp, ip, si, di, flag register (for 32-bit: eax, ebx, ecx, edx, esp, ebp, eip, esi, edi) (for 64-bit: rax, rbx, rcx, rdx, rsp, rbp, rip, rsi, rdi) ax, bx, cx, dx: General purpose. Can contain any data cs, ds, ss, es :..

Lecture 2: Installing/Reading Linux Kernel 1. What's in the linux kernel init: start up code main.c : beginning of linux kernel: cpu-indendent code for basic system management fork.c, exit.c, sched.c : process creation, exit, scheduling arch : cpu-dependent code for basic system management arch/x86 : cpu-dependent code for intel x86 cpu arch/x86/boot : boot-related code arch/x86/kernel: low-leve..