SYSCALL_MODULE9
Syscall kernel module declaration macro
Usage
#include <sys/param.h>
#include <sys/kernel.h>
#include <sys/proc.h>
#include <sys/module.h>
#include <sys/sysent.h>
SYSCALL_MODULE(name, int *offset, struct sysent new_sysent, modeventhand_t evh, void *arg);
Overview
The SYSCALL_MODULE() macro declares a new syscall. SYSCALL_MODULE() expands into a kernel module declaration named as name.
The rest of the arguments expected by this macro are:
- offset
-
A pointer to an int which saves the offset in struct sysent where the syscall is allocated.
- new_sysent
-
The function implementing the syscall and the number of arguments this function needs (see ⟨sys/sysent.h⟩).
- evh
-
A pointer to the kernel module event handler function with the argument arg. Please refer to module(9) for more information.
- arg
-
The argument passed to the callback functions of the evh event handler when it is called.
Examples
A minimal example for a syscall module can be found in /usr/share/examples/kld/syscall/module/syscall.c.