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) #include "unwind.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  3) #include "dso.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  4) #include "map.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  5) #include "thread.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  6) #include "session.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  7) #include "debug.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  8) #include "env.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  9) #include "callchain.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) struct unwind_libunwind_ops __weak *local_unwind_libunwind_ops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) struct unwind_libunwind_ops __weak *x86_32_unwind_libunwind_ops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) struct unwind_libunwind_ops __weak *arm64_unwind_libunwind_ops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) static void unwind__register_ops(struct maps *maps, struct unwind_libunwind_ops *ops)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) 	maps->unwind_libunwind_ops = ops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) int unwind__prepare_access(struct maps *maps, struct map *map, bool *initialized)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) 	const char *arch;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) 	enum dso_type dso_type;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) 	struct unwind_libunwind_ops *ops = local_unwind_libunwind_ops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) 	int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) 	if (!dwarf_callchain_users)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) 		return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) 	if (maps->addr_space) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) 		pr_debug("unwind: thread map already set, dso=%s\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) 			 map->dso->name);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) 		if (initialized)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) 			*initialized = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) 		return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) 	/* env->arch is NULL for live-mode (i.e. perf top) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) 	if (!maps->machine->env || !maps->machine->env->arch)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) 		goto out_register;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) 	dso_type = dso__type(map->dso, maps->machine);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) 	if (dso_type == DSO__TYPE_UNKNOWN)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) 		return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) 	arch = perf_env__arch(maps->machine->env);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) 	if (!strcmp(arch, "x86")) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) 		if (dso_type != DSO__TYPE_64BIT)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) 			ops = x86_32_unwind_libunwind_ops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) 	} else if (!strcmp(arch, "arm64") || !strcmp(arch, "arm")) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) 		if (dso_type == DSO__TYPE_64BIT)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) 			ops = arm64_unwind_libunwind_ops;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) 	if (!ops) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) 		pr_err("unwind: target platform=%s is not supported\n", arch);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) 		return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) out_register:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) 	unwind__register_ops(maps, ops);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) 	err = maps->unwind_libunwind_ops->prepare_access(maps);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) 	if (initialized)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) 		*initialized = err ? false : true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) 	return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) void unwind__flush_access(struct maps *maps)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) 	if (maps->unwind_libunwind_ops)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) 		maps->unwind_libunwind_ops->flush_access(maps);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) void unwind__finish_access(struct maps *maps)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) 	if (maps->unwind_libunwind_ops)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) 		maps->unwind_libunwind_ops->finish_access(maps);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) int unwind__get_entries(unwind_entry_cb_t cb, void *arg,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) 			 struct thread *thread,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) 			 struct perf_sample *data, int max_stack)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) 	if (thread->maps->unwind_libunwind_ops)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) 		return thread->maps->unwind_libunwind_ops->get_entries(cb, arg, thread, data, max_stack);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) }