syscall.64.c File Reference

64-bit system call support. More...

#include <apic.h>
#include <cpu.h>
#include <cpu/syscall.h>
#include <cpu/smp.h>
#include <logging.h>
#include <memory.h>

Macros
#define	SYSCALL_TABLE_SIZE   (sizeof(SYSCALL_TABLE) / sizeof(SYSCALL_TABLE[0]))

Typedefs
typedef int64_t(*	syscall_f) (uint64_t arg1, uint64_t arg2, uint64_t arg3, uint64_t arg4, uint64_t arg5, uint64_t arg6)
	System call function type.

Functions
	MODULE ("turnstone.kernel.cpu.syscall")
uint64_t	syscall_handler_create_stack (uint64_t old_stack)
	creates stack for system call handler.
int64_t	syscall_handler_null_handler_error (uint64_t handler_no, uint64_t syscall_handler_offset)
	null handler error. when system call handler is null, this function is called. prints error message about null handler and returns -1.
int64_t	syscall_handler_notfound_error (uint64_t syscall_no)
	not found error. when system call handler is not found, this function is called. prints error message about not found handler and returns -1.
int64_t	syscall_function_hlt (uint64_t arg1, uint64_t arg2, uint64_t arg3, uint64_t arg4, uint64_t arg5, uint64_t arg6)
	cpu halt system call handler.
int64_t	syscall_function_cli_and_hlt (uint64_t arg1, uint64_t arg2, uint64_t arg3, uint64_t arg4, uint64_t arg5, uint64_t arg6)
	cpu cli and hlt system call handler. after this system call, cpu is halted forever.
void	syscall_init (void)
void	syscall_handler (void)
	syscall handler.

Variables
const syscall_f	SYSCALL_TABLE []
	system call table.

Detailed Description

64-bit system call support.

This work is licensed under TURNSTONE OS Public License. Please read and understand latest version of Licence.

Macro Definition Documentation

SYSCALL_TABLE_SIZE

#define SYSCALL_TABLE_SIZE   (sizeof(SYSCALL_TABLE) / sizeof(SYSCALL_TABLE[0]))

system call table size

Typedef Documentation

syscall_f

typedef int64_t(* syscall_f) (uint64_t arg1, uint64_t arg2, uint64_t arg3, uint64_t arg4, uint64_t arg5, uint64_t arg6)

System call function type.

Parameters

[in]	arg1	Argument 1.
[in]	arg2	Argument 2.
[in]	arg3	Argument 3.
[in]	arg4	Argument 4.
[in]	arg5	Argument 5.
[in]	arg6	Argument 6.

Returns

Return value.

Function Documentation

MODULE()

MODULE

(

"turnstone.kernel.cpu.syscall"

)

module name

syscall_function_cli_and_hlt()

int64_t syscall_function_cli_and_hlt	(	uint64_t	arg1,
		uint64_t	arg2,
		uint64_t	arg3,
		uint64_t	arg4,
		uint64_t	arg5,
		uint64_t	arg6 )

cpu cli and hlt system call handler. after this system call, cpu is halted forever.

Parameters

[in]	arg1	Argument 1. (not used)
[in]	arg2	Argument 2. (not used)
[in]	arg3	Argument 3. (not used)
[in]	arg4	Argument 4. (not used)
[in]	arg5	Argument 5. (not used)
[in]	arg6	Argument 6. (not used)

Returns

always 0.

syscall_function_hlt()

int64_t syscall_function_hlt	(	uint64_t	arg1,
		uint64_t	arg2,
		uint64_t	arg3,
		uint64_t	arg4,
		uint64_t	arg5,
		uint64_t	arg6 )

cpu halt system call handler.

Parameters

[in]	arg1	Argument 1. (not used)
[in]	arg2	Argument 2. (not used)
[in]	arg3	Argument 3. (not used)
[in]	arg4	Argument 4. (not used)
[in]	arg5	Argument 5. (not used)
[in]	arg6	Argument 6. (not used)

Returns

always 0.

syscall_handler_create_stack()

uint64_t syscall_handler_create_stack

(

uint64_t

old_stack

)

creates stack for system call handler.

Parameters

[in]

old_stack

Old stack pointer.

Returns

New stack pointer.

syscall_handler_notfound_error()

int64_t syscall_handler_notfound_error

(

uint64_t

syscall_no

)

not found error. when system call handler is not found, this function is called. prints error message about not found handler and returns -1.

Parameters

[in]

syscall_no

System call number.

Returns

always -1.

syscall_handler_null_handler_error()

int64_t syscall_handler_null_handler_error	(	uint64_t	handler_no,
		uint64_t	syscall_handler_offset )

null handler error. when system call handler is null, this function is called. prints error message about null handler and returns -1.

Parameters

[in]	handler_no	Handler number.
[in]	syscall_handler_offset	System call handler offset.

Returns

always -1.

Variable Documentation

SYSCALL_TABLE

const syscall_f SYSCALL_TABLE[]

Initial value:

= {
    syscall_function_hlt,
    syscall_function_cli_and_hlt,
}

system call table.