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linux-next/tools/perf/util/bpf-prologue.h
Arnaldo Carvalho de Melo a43783aeec perf tools: Include errno.h where needed
Removing it from util.h, part of an effort to disentangle the includes
hell, that makes changes to util.h or something included by it to cause
a complete rebuild of the tools.

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Wang Nan <wangnan0@huawei.com>
Link: http://lkml.kernel.org/n/tip-ztrjy52q1rqcchuy3rubfgt2@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2017-04-19 13:01:51 -03:00

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867 B
C

/*
* 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 */