REAL_SIG_PF      2270 gc/os_dep.c        typedef void (* REAL_SIG_PF)(int, int, struct sigcontext *);
REAL_SIG_PF      2280 gc/os_dep.c        typedef void (* REAL_SIG_PF)(int, SIGINFO_T *, void *);
REAL_SIG_PF      2282 gc/os_dep.c        typedef void (* REAL_SIG_PF)();
REAL_SIG_PF      2298 gc/os_dep.c          typedef void (* REAL_SIG_PF)(int, int, s_c *);
REAL_SIG_PF      2301 gc/os_dep.c            typedef void (* REAL_SIG_PF)(int, siginfo_t *, s_c *);
REAL_SIG_PF      2306 gc/os_dep.c            typedef void (* REAL_SIG_PF)(int, s_c);
REAL_SIG_PF      2596 gc/os_dep.c    		    (*(REAL_SIG_PF)old_handler) (sig, scp, context);
REAL_SIG_PF      2601 gc/os_dep.c    		        (*(REAL_SIG_PF)old_handler) (sig, code, sc);
REAL_SIG_PF      2604 gc/os_dep.c    		        (*(REAL_SIG_PF)old_handler) (sig, si, scp);
REAL_SIG_PF      2606 gc/os_dep.c    		        (*(REAL_SIG_PF)old_handler) (sig, sc);
REAL_SIG_PF      2612 gc/os_dep.c    		    (*(REAL_SIG_PF)old_handler) (sig, code, scp);