Kernel structures
Some Linux Kernel Structures
Interrupt Descriptor Table (IDT)
https://en.wikipedia.org/wiki/Interrupt_descriptor_table
The Interrupt Descriptor Table (IDT) is a data structure used by the x86 architecture to implement an interrupt vector table. The IDT is used by the processor to determine the correct response to interrupts and exceptions.
From [http://cs-pub.bu.edu/fac/richwest/cs591_w1/notes/wk1.pdf#page=16]
Set up during kernel boot-up. For instance, sets interrupt 80 (int $0x80) for calling system calls:
set_system_gate(0x80, &system_call);
Located in
arch/i386/kernel/entry.S System call and low-level fault handling routines.
include/asm-i386/unistd.h System call numbers and macros.
kernel/sys.c System call service routines.
Process Control Block (PCB)
https://en.wikipedia.org/wiki/Process_control_block
A process control block (PCB) is a data structure used by computer operating systems to store all the information about a process. It is also known as a process descriptor.
In Linux the PCB is named Task structure and is defined in the scheduler code
Learning about Linux Processes
Kernel books
The Art of Linux Kernel Design
https://theiotlearninginitiative.gitbook.io/linuxkernel/introduction