diff options
Diffstat (limited to 'kernel/arch/sh/kernel/perf_callchain.c')
-rw-r--r-- | kernel/arch/sh/kernel/perf_callchain.c | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/kernel/arch/sh/kernel/perf_callchain.c b/kernel/arch/sh/kernel/perf_callchain.c new file mode 100644 index 000000000..cc80b614b --- /dev/null +++ b/kernel/arch/sh/kernel/perf_callchain.c @@ -0,0 +1,41 @@ +/* + * Performance event callchain support - SuperH architecture code + * + * Copyright (C) 2009 Paul Mundt + * + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file "COPYING" in the main directory of this archive + * for more details. + */ +#include <linux/kernel.h> +#include <linux/sched.h> +#include <linux/perf_event.h> +#include <linux/percpu.h> +#include <asm/unwinder.h> +#include <asm/ptrace.h> + +static int callchain_stack(void *data, char *name) +{ + return 0; +} + +static void callchain_address(void *data, unsigned long addr, int reliable) +{ + struct perf_callchain_entry *entry = data; + + if (reliable) + perf_callchain_store(entry, addr); +} + +static const struct stacktrace_ops callchain_ops = { + .stack = callchain_stack, + .address = callchain_address, +}; + +void +perf_callchain_kernel(struct perf_callchain_entry *entry, struct pt_regs *regs) +{ + perf_callchain_store(entry, regs->pc); + + unwind_stack(NULL, regs, NULL, &callchain_ops, entry); +} |