diff options
| author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-06 01:02:30 +0000 |
|---|---|---|
| committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-06 01:02:30 +0000 |
| commit | 76cb841cb886eef6b3bee341a2266c76578724ad (patch) | |
| tree | f5892e5ba6cc11949952a6ce4ecbe6d516d6ce58 /tools/perf/util/bpf-prologue.h | |
| parent | Initial commit. (diff) | |
| download | linux-76cb841cb886eef6b3bee341a2266c76578724ad.tar.xz linux-76cb841cb886eef6b3bee341a2266c76578724ad.zip | |
Adding upstream version 4.19.249.upstream/4.19.249
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'tools/perf/util/bpf-prologue.h')
| -rw-r--r-- | tools/perf/util/bpf-prologue.h | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/tools/perf/util/bpf-prologue.h b/tools/perf/util/bpf-prologue.h new file mode 100644 index 000000000..c50c73580 --- /dev/null +++ b/tools/perf/util/bpf-prologue.h @@ -0,0 +1,37 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * 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 +#include <errno.h> + +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 */ |