Task State Segment (TSS)

Is a special structure on x86-based computers which holds information about a task. It is used by the operating system kernel for task management. More...

Classes
struct	tss_entry
	Task state segment entry. More...

Typedefs
typedef struct tss_entry	tss_entry_t
	Task state segment entry.

Functions
void	tss_flush (void)
	Flushes the Task State Segment.
void	tss_init (uint8_t idx, uint32_t ss0)
	We don't need tss to assist task switching, but it's required to have one tss for switching back to kernel mode(system call for example). More...
void	tss_set_stack (uint32_t kss, uint32_t kesp)
	This function is used to set the esp the kernel should be using. More...

Detailed Description

Is a special structure on x86-based computers which holds information about a task. It is used by the operating system kernel for task management.

Function Documentation

tss_init()

void tss_init	(	uint8_t	idx,
		uint32_t	ss0
	)

We don't need tss to assist task switching, but it's required to have one tss for switching back to kernel mode(system call for example).

Parameters

idx	Index.
ss0	Kernel data segment.

tss_set_stack()

void tss_set_stack	(	uint32_t	kss,
		uint32_t	kesp
	)

This function is used to set the esp the kernel should be using.

Parameters

kss	Kernel data segment.
kesp	Kernel stack address.