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| author | David S. Miller <davem@davemloft.net> | 2016-01-13 00:21:27 -0500 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2016-01-13 00:21:27 -0500 |
| commit | ddb5388ffd0ad75d07e7b78181a0b579824ba6f0 (patch) | |
| tree | be1e2bd103c69d7bbace3fffd97bc3d714bbc3d7 /tools/perf/util/bpf-prologue.h | |
| parent | ccdf6ce6a8dba374668ae9b4d763e19903611c38 (diff) | |
| parent | 67990608c8b95d2b8ccc29932376ae73d5818727 (diff) | |
Merge git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux
Diffstat (limited to 'tools/perf/util/bpf-prologue.h')
| -rw-r--r-- | tools/perf/util/bpf-prologue.h | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/tools/perf/util/bpf-prologue.h b/tools/perf/util/bpf-prologue.h new file mode 100644 index 000000000000..d94cbea12899 --- /dev/null +++ b/tools/perf/util/bpf-prologue.h @@ -0,0 +1,34 @@ +/* + * Copyright (C) 2015, He Kuang <hekuang@huawei.com> + * Copyright (C) 2015, Huawei Inc. + */ +#ifndef __BPF_PROLOGUE_H +#define __BPF_PROLOGUE_H + +#include <linux/compiler.h> +#include <linux/filter.h> +#include "probe-event.h" + +#define BPF_PROLOGUE_MAX_ARGS 3 +#define BPF_PROLOGUE_START_ARG_REG BPF_REG_3 +#define BPF_PROLOGUE_FETCH_RESULT_REG BPF_REG_2 + +#ifdef HAVE_BPF_PROLOGUE +int bpf__gen_prologue(struct probe_trace_arg *args, int nargs, + struct bpf_insn *new_prog, size_t *new_cnt, + size_t cnt_space); +#else +static inline int +bpf__gen_prologue(struct probe_trace_arg *args __maybe_unused, + int nargs __maybe_unused, + struct bpf_insn *new_prog __maybe_unused, + size_t *new_cnt, + size_t cnt_space __maybe_unused) +{ + if (!new_cnt) + return -EINVAL; + *new_cnt = 0; + return -ENOTSUP; +} +#endif +#endif /* __BPF_PROLOGUE_H */ |