syscall.c File Reference

System Call management functions. More...

Macros
#define	__DEBUG_HEADER__   "[SYSCLL]"
	Change header.
#define	__DEBUG_LEVEL__   LOGLEVEL_NOTICE
	Set log level.

Typedefs
typedef int(*	SystemCall) (void)
	The signature of a function call.
typedef int(*	SystemCall5) (uint32_t, uint32_t, uint32_t, uint32_t, uint32_t)
	The signature of a function call.
typedef int(*	SystemCall6) (uint32_t, uint32_t, uint32_t, uint32_t, uint32_t, uint32_t)
	The signature of a function call.

Functions
static int	sys_ni_syscall (void)
	A Not Implemented (NI) system-call. More...
void	syscall_init (void)
	Initialize the system calls.
pt_regs *	get_current_interrupt_stack_frame (void)
	Returns the current interrupt stack frame. More...
void	syscall_handler (pt_regs *f)
	Handler for the system calls. More...

Variables
SystemCall	sys_call_table [SYSCALL_NUMBER]
	The list of function call.
static pt_regs *	current_interrupt_stack_frame
	Last interupt stack frame.

Detailed Description

System Call management functions.

Copyright

(c) 2014-2024 This file is distributed under the MIT License. See LICENSE.md for details.

Function Documentation

get_current_interrupt_stack_frame()

pt_regs* get_current_interrupt_stack_frame

(

void

)

Returns the current interrupt stack frame.

Returns

Pointer to the stack frame.

sys_ni_syscall()

static int sys_ni_syscall ( void  )

inlinestatic

A Not Implemented (NI) system-call.

Returns

Always returns -ENOSYS.

Linux provides a "not implemented" system call, sys_ni_syscall(), which does nothing except return ENOSYS, the error corresponding to an invalid system call. This function is used to "plug the hole" in the rare event that a syscall is removed or otherwise made unavailable.

syscall_handler()

void syscall_handler

(

pt_regs *

f

)

Handler for the system calls.

Parameters

f	The interrupt stack frame.