idt_gate_t Struct Reference

Data Fields
uint16_t	low_offset
	Lower 16 bits of handler function address.
uint16_t	sel
	Kernel segment selector.
uint8_t	always0
	Must be 0.
uint8_t	flags
uint16_t	high_offset
	Higher 16 bits of handler function address.

Detailed Description

Defines an interrupt gate

Field Documentation

flags

uint8_t idt_gate_t::flags

Flags byte. Gives info about the descriptor Bit 7: Present. Must be 1 for all valid selectors. Bits 6-5: Privilege. Contains the minimum ring level for the caller. 0 for kernel mode, 3 for user mode. Bit 4: Set to 0 for interrupt gates. Bits 3-0: 1110 = "32 bit interrupt gate".

---

The documentation for this struct was generated from the following file:

• kernel/cpu/i386/idt.c