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. More...

Classes
struct	idt_descriptor_t
	This structure describes one interrupt gate. More...
struct	idt_pointer_t
	A pointer structure used for informing the CPU about our IDT. More...

Macros
#define	IDT_SIZE   256
	The maximum dimension of the IDT.
#define	TASK_GATE   0x5
	When an exception occurs whose entry is a Task Gate, a task switch results.
#define	INT16_GATE   0x6
	Used to specify an interrupt service routine (16-bit).
#define	TRAP16_GATE   0x7
	Similar to an Interrupt gate (16-bit).
#define	INT32_GATE   0xE
	Used to specify an interrupt service routine (32-bit).
#define	TRAP32_GATE   0xF
	Similar to an Interrupt gate (32-bit).

Typedefs
typedef struct idt_descriptor_t	_syscall0 = _syscall0( (packed) )= _syscall1( (packed) )= _syscall2( (packed) )= _syscall3( (packed) )= idt_descriptor_t
	This structure describes one interrupt gate. More...

Functions
void	init_idt (void)
	Initialise the interrupt descriptor table.

Detailed Description

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.

Typedef Documentation

_syscall0

typedef struct idt_pointer_t _syscall0 = _syscall0( (packed) )= _syscall1( (packed) )= _syscall2( (packed) )= _syscall3( (packed) )= idt_descriptor_t

This structure describes one interrupt gate.

A pointer structure used for informing the CPU about our IDT.