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37 lines
906 B
37 lines
906 B
/* SPDX-License-Identifier: GPL-2.0 */ |
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/* |
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* Copyright (C) 2015, He Kuang <[email protected]> |
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* Copyright (C) 2015, Huawei Inc. |
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*/ |
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#ifndef __BPF_PROLOGUE_H |
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#define __BPF_PROLOGUE_H |
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#include <linux/compiler.h> |
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#include <linux/filter.h> |
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#include "probe-event.h" |
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#define BPF_PROLOGUE_MAX_ARGS 3 |
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#define BPF_PROLOGUE_START_ARG_REG BPF_REG_3 |
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#define BPF_PROLOGUE_FETCH_RESULT_REG BPF_REG_2 |
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#ifdef HAVE_BPF_PROLOGUE |
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int bpf__gen_prologue(struct probe_trace_arg *args, int nargs, |
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struct bpf_insn *new_prog, size_t *new_cnt, |
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size_t cnt_space); |
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#else |
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#include <errno.h> |
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static inline int |
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bpf__gen_prologue(struct probe_trace_arg *args __maybe_unused, |
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int nargs __maybe_unused, |
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struct bpf_insn *new_prog __maybe_unused, |
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size_t *new_cnt, |
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size_t cnt_space __maybe_unused) |
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{ |
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if (!new_cnt) |
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return -EINVAL; |
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*new_cnt = 0; |
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return -ENOTSUP; |
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} |
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#endif |
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#endif /* __BPF_PROLOGUE_H */
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