101     size_t btsize, void *start_frame, int64_t addr_offset,  in backtrace_internal()  argument
112 	fp = start_frame;  in backtrace_internal()
256 	uintptr_t start_frame = ctl ? ctl->btc_frame_addr : 0;  in _backtrace_preamble()  local
266 		*start_frame_out = start_frame ?: fp;  in _backtrace_preamble()
267 	} else if (start_frame == 0) {  in _backtrace_preamble()
270 		*start_frame_out = start_frame;  in _backtrace_preamble()
280 	uintptr_t start_frame = ctl ? ctl->btc_frame_addr : 0;  in backtrace()  local
281 	uintptr_t pc = _backtrace_preamble(ctl, &start_frame);  in backtrace()
293 	    max_frames * sizeof(uintptr_t), (void *)start_frame,  in backtrace()
311 	uintptr_t start_frame = ctl ? ctl->btc_frame_addr : 0;  in backtrace_packed()  local
312 	uintptr_t pc = _backtrace_preamble(ctl, &start_frame);  in backtrace_packed()
322 	    (void *)start_frame, ctl ? ctl->btc_addr_offset : 0, info_out);  in backtrace_packed()