[mirror_ubuntu-disco-kernel.git] / tools / perf / util / bpf-prologue.h

/* 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 */
Commit	Line	Data
b2441318	1	/* SPDX-License-Identifier: GPL-2.0 */
bfc077b4 HK	2	/*
	3	* Copyright (C) 2015, He Kuang <hekuang@huawei.com>
	4	* Copyright (C) 2015, Huawei Inc.
	5	*/
	6	#ifndef __BPF_PROLOGUE_H
	7	#define __BPF_PROLOGUE_H
	8
	9	#include <linux/compiler.h>
	10	#include <linux/filter.h>
	11	#include "probe-event.h"
	12
	13	#define BPF_PROLOGUE_MAX_ARGS 3
	14	#define BPF_PROLOGUE_START_ARG_REG BPF_REG_3
	15	#define BPF_PROLOGUE_FETCH_RESULT_REG BPF_REG_2
	16
	17	#ifdef HAVE_BPF_PROLOGUE
	18	int bpf__gen_prologue(struct probe_trace_arg *args, int nargs,
	19	struct bpf_insn new_prog, size_t new_cnt,
	20	size_t cnt_space);
	21	#else
a43783ae ACM	22	#include <errno.h>
a43783ae ACM	23
bfc077b4 HK	24	static inline int
	25	bpf__gen_prologue(struct probe_trace_arg *args __maybe_unused,
	26	int nargs __maybe_unused,
	27	struct bpf_insn *new_prog __maybe_unused,
	28	size_t *new_cnt,
	29	size_t cnt_space __maybe_unused)
	30	{
	31	if (!new_cnt)
	32	return -EINVAL;
	33	*new_cnt = 0;
	34	return -ENOTSUP;
	35	}
	36	#endif
	37	#endif /* __BPF_PROLOGUE_H */