*strange* that a kernel module uses the "_syscall" macro to do a syscall with "int 0x80" while already being in kernelspace...
It's interesting that the module contains the following code:
------------------------ //#define FGL_USE_SCT /* for developer use only */
//...<snip>...
#ifdef FGL_USE_SCT // get direct function pointers from sys_call_table for calling #else /* FGL_USE_SCT */ // call functions indirectly by using the syscall macros, // entrypoints get defined by below constructs
#if !defined(__ia64__) // the macros do use errno variable static int errno; #endif // __ia64__
// int mlock(const void *addr, size_t len);
_syscall2(int, mlock, const void *, addr, size_t, len )
// int munlock(const void *addr, size_t len);
_syscall2(int, munlock, const void *, addr, size_t, len )
#if !defined(__ia64__)
#if !defined(__x86_64__)
// TODO: ia64
// int modify_ldt(int func, void *ptr, unsigned long bytecount);
_syscall3( int, modify_ldt, int, func, void *, ptr, unsigned long, bytecount )
#endif
#endif
#endif /* FGL_USE_SCT */
--------------------------
I actually tried to #define FGL_USE_SCT, but it didn't compile either.
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