| 1 | |
| 2 | |
| 3 | * Performance event callchain support - SuperH architecture code
|
| 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, unsigned long addr, int reliable)
|
| 15 | {
|
| 16 | struct perf_callchain_entry_ctx *entry = data;
|
| 17 |
|
| 18 | if (reliable)
|
| 19 | perf_callchain_store(entry, addr);
|
| 20 | }
|
| 21 |
|
| 22 | static const struct stacktrace_ops callchain_ops = {
|
| 23 | .address = callchain_address,
|
| 24 | };
|
| 25 |
|
| 26 | void
|
| 27 | perf_callchain_kernel(struct perf_callchain_entry_ctx *entry, struct pt_regs *regs)
|
| 28 | {
|
| 29 | perf_callchain_store(entry, regs->pc);
|
| 30 |
|
| 31 | unwind_stack(NULL, regs, NULL, &callchain_ops, entry);
|
| 32 | }
|