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830fafec PM |
1 | /* |
2 | * Performance event callchain support - SuperH architecture code | |
3 | * | |
4 | * Copyright (C) 2009 Paul Mundt | |
5 | * | |
6 | * This file is subject to the terms and conditions of the GNU General Public | |
7 | * License. See the file "COPYING" in the main directory of this archive | |
8 | * for more details. | |
9 | */ | |
10 | #include <linux/kernel.h> | |
11 | #include <linux/sched.h> | |
12 | #include <linux/perf_event.h> | |
13 | #include <linux/percpu.h> | |
14 | #include <asm/unwinder.h> | |
15 | #include <asm/ptrace.h> | |
16 | ||
830fafec PM |
17 | static int callchain_stack(void *data, char *name) |
18 | { | |
19 | return 0; | |
20 | } | |
21 | ||
22 | static void callchain_address(void *data, unsigned long addr, int reliable) | |
23 | { | |
24 | struct perf_callchain_entry *entry = data; | |
25 | ||
26 | if (reliable) | |
70791ce9 | 27 | perf_callchain_store(entry, addr); |
830fafec PM |
28 | } |
29 | ||
30 | static const struct stacktrace_ops callchain_ops = { | |
830fafec PM |
31 | .stack = callchain_stack, |
32 | .address = callchain_address, | |
33 | }; | |
34 | ||
56962b44 FW |
35 | void |
36 | perf_callchain_kernel(struct perf_callchain_entry *entry, struct pt_regs *regs) | |
830fafec | 37 | { |
70791ce9 | 38 | perf_callchain_store(entry, regs->pc); |
830fafec PM |
39 | |
40 | unwind_stack(NULL, regs, NULL, &callchain_ops, entry); | |
41 | } |