fr_arg           3944 gc/os_dep.c            long	fr_arg[NARGS];  /* All the arguments go here.	*/
fr_arg           3954 gc/os_dep.c    	long	fr_arg[6];
fr_arg           4081 gc/os_dep.c    	  info[nframes].ci_arg[i] = ~(fp->fr_arg[i]);