1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0
2*4882a593Smuzhiyun #include "unwind.h"
3*4882a593Smuzhiyun #include "dso.h"
4*4882a593Smuzhiyun #include "map.h"
5*4882a593Smuzhiyun #include "thread.h"
6*4882a593Smuzhiyun #include "session.h"
7*4882a593Smuzhiyun #include "debug.h"
8*4882a593Smuzhiyun #include "env.h"
9*4882a593Smuzhiyun #include "callchain.h"
10*4882a593Smuzhiyun
11*4882a593Smuzhiyun struct unwind_libunwind_ops __weak *local_unwind_libunwind_ops;
12*4882a593Smuzhiyun struct unwind_libunwind_ops __weak *x86_32_unwind_libunwind_ops;
13*4882a593Smuzhiyun struct unwind_libunwind_ops __weak *arm64_unwind_libunwind_ops;
14*4882a593Smuzhiyun
unwind__register_ops(struct maps * maps,struct unwind_libunwind_ops * ops)15*4882a593Smuzhiyun static void unwind__register_ops(struct maps *maps, struct unwind_libunwind_ops *ops)
16*4882a593Smuzhiyun {
17*4882a593Smuzhiyun maps->unwind_libunwind_ops = ops;
18*4882a593Smuzhiyun }
19*4882a593Smuzhiyun
unwind__prepare_access(struct maps * maps,struct map * map,bool * initialized)20*4882a593Smuzhiyun int unwind__prepare_access(struct maps *maps, struct map *map, bool *initialized)
21*4882a593Smuzhiyun {
22*4882a593Smuzhiyun const char *arch;
23*4882a593Smuzhiyun enum dso_type dso_type;
24*4882a593Smuzhiyun struct unwind_libunwind_ops *ops = local_unwind_libunwind_ops;
25*4882a593Smuzhiyun int err;
26*4882a593Smuzhiyun
27*4882a593Smuzhiyun if (!dwarf_callchain_users)
28*4882a593Smuzhiyun return 0;
29*4882a593Smuzhiyun
30*4882a593Smuzhiyun if (maps->addr_space) {
31*4882a593Smuzhiyun pr_debug("unwind: thread map already set, dso=%s\n",
32*4882a593Smuzhiyun map->dso->name);
33*4882a593Smuzhiyun if (initialized)
34*4882a593Smuzhiyun *initialized = true;
35*4882a593Smuzhiyun return 0;
36*4882a593Smuzhiyun }
37*4882a593Smuzhiyun
38*4882a593Smuzhiyun /* env->arch is NULL for live-mode (i.e. perf top) */
39*4882a593Smuzhiyun if (!maps->machine->env || !maps->machine->env->arch)
40*4882a593Smuzhiyun goto out_register;
41*4882a593Smuzhiyun
42*4882a593Smuzhiyun dso_type = dso__type(map->dso, maps->machine);
43*4882a593Smuzhiyun if (dso_type == DSO__TYPE_UNKNOWN)
44*4882a593Smuzhiyun return 0;
45*4882a593Smuzhiyun
46*4882a593Smuzhiyun arch = perf_env__arch(maps->machine->env);
47*4882a593Smuzhiyun
48*4882a593Smuzhiyun if (!strcmp(arch, "x86")) {
49*4882a593Smuzhiyun if (dso_type != DSO__TYPE_64BIT)
50*4882a593Smuzhiyun ops = x86_32_unwind_libunwind_ops;
51*4882a593Smuzhiyun } else if (!strcmp(arch, "arm64") || !strcmp(arch, "arm")) {
52*4882a593Smuzhiyun if (dso_type == DSO__TYPE_64BIT)
53*4882a593Smuzhiyun ops = arm64_unwind_libunwind_ops;
54*4882a593Smuzhiyun }
55*4882a593Smuzhiyun
56*4882a593Smuzhiyun if (!ops) {
57*4882a593Smuzhiyun pr_err("unwind: target platform=%s is not supported\n", arch);
58*4882a593Smuzhiyun return 0;
59*4882a593Smuzhiyun }
60*4882a593Smuzhiyun out_register:
61*4882a593Smuzhiyun unwind__register_ops(maps, ops);
62*4882a593Smuzhiyun
63*4882a593Smuzhiyun err = maps->unwind_libunwind_ops->prepare_access(maps);
64*4882a593Smuzhiyun if (initialized)
65*4882a593Smuzhiyun *initialized = err ? false : true;
66*4882a593Smuzhiyun return err;
67*4882a593Smuzhiyun }
68*4882a593Smuzhiyun
unwind__flush_access(struct maps * maps)69*4882a593Smuzhiyun void unwind__flush_access(struct maps *maps)
70*4882a593Smuzhiyun {
71*4882a593Smuzhiyun if (maps->unwind_libunwind_ops)
72*4882a593Smuzhiyun maps->unwind_libunwind_ops->flush_access(maps);
73*4882a593Smuzhiyun }
74*4882a593Smuzhiyun
unwind__finish_access(struct maps * maps)75*4882a593Smuzhiyun void unwind__finish_access(struct maps *maps)
76*4882a593Smuzhiyun {
77*4882a593Smuzhiyun if (maps->unwind_libunwind_ops)
78*4882a593Smuzhiyun maps->unwind_libunwind_ops->finish_access(maps);
79*4882a593Smuzhiyun }
80*4882a593Smuzhiyun
unwind__get_entries(unwind_entry_cb_t cb,void * arg,struct thread * thread,struct perf_sample * data,int max_stack)81*4882a593Smuzhiyun int unwind__get_entries(unwind_entry_cb_t cb, void *arg,
82*4882a593Smuzhiyun struct thread *thread,
83*4882a593Smuzhiyun struct perf_sample *data, int max_stack)
84*4882a593Smuzhiyun {
85*4882a593Smuzhiyun if (thread->maps->unwind_libunwind_ops)
86*4882a593Smuzhiyun return thread->maps->unwind_libunwind_ops->get_entries(cb, arg, thread, data, max_stack);
87*4882a593Smuzhiyun return 0;
88*4882a593Smuzhiyun }
89