Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  1) // SPDX-License-Identifier: GPL-2.0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  3)  * arch/ia64/kernel/stacktrace.c
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  4)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  5)  * Stack trace management functions
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  6)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  7)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  8) #include <linux/sched.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  9) #include <linux/stacktrace.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) static void
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) ia64_do_save_stack(struct unw_frame_info *info, void *arg)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) 	struct stack_trace *trace = arg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) 	unsigned long ip;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) 	int skip = trace->skip;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) 	trace->nr_entries = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) 	do {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) 		unw_get_ip(info, &ip);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) 		if (ip == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) 			break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) 		if (skip == 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) 			trace->entries[trace->nr_entries++] = ip;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) 			if (trace->nr_entries == trace->max_entries)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) 				break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) 		} else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) 			skip--;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) 	} while (unw_unwind(info) >= 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34)  * Save stack-backtrace addresses into a stack_trace buffer.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) void save_stack_trace(struct stack_trace *trace)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) 	unw_init_running(ia64_do_save_stack, trace);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) EXPORT_SYMBOL(save_stack_trace);