-extern int dtrace_safe_defer_signal(void);
-extern void dtrace_safe_synchronous_signal(void);
-
-extern int dtrace_mach_aframes(void);
-
-#if !defined(__APPLE__)
-#if defined(__i386) || defined(__amd64)
-extern int dtrace_instr_size(uchar_t *instr);
-extern int dtrace_instr_size_isa(uchar_t *, model_t, int *);
-extern void dtrace_invop_add(int (*)(uintptr_t, uintptr_t *, uintptr_t));
-extern void dtrace_invop_remove(int (*)(uintptr_t, uintptr_t *, uintptr_t));
-extern void dtrace_invop_callsite(void);
-#endif
-
-#ifdef __sparc
-extern int dtrace_blksuword32(uintptr_t, uint32_t *, int);
-extern void dtrace_getfsr(uint64_t *);
-#endif
-#else