1 // SPDX-License-Identifier: GPL-2.0 1
2 /*
3 * Performance event callchain support - Super
4 *
5 * Copyright (C) 2009 Paul Mundt
6 */
7 #include <linux/kernel.h>
8 #include <linux/sched.h>
9 #include <linux/perf_event.h>
10 #include <linux/percpu.h>
11 #include <asm/unwinder.h>
12 #include <asm/ptrace.h>
13
14 static void callchain_address(void *data, unsi
15 {
16 struct perf_callchain_entry_ctx *entry
17
18 if (reliable)
19 perf_callchain_store(entry, ad
20 }
21
22 static const struct stacktrace_ops callchain_o
23 .address = callchain_address,
24 };
25
26 void
27 perf_callchain_kernel(struct perf_callchain_en
28 {
29 perf_callchain_store(entry, regs->pc);
30
31 unwind_stack(NULL, regs, NULL, &callch
32 }
33
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