projects / linux-2.6-block.git / blame
| Commit | Line | Data |
|---|---|---|
| bfc077b4 HK |
1 | /* |
| 2 | * Copyright (C) 2015, He Kuang <hekuang@huawei.com> | |
| 3 | * Copyright (C) 2015, Huawei Inc. | |
| 4 | */ | |
| 5 | #ifndef __BPF_PROLOGUE_H | |
| 6 | #define __BPF_PROLOGUE_H | |
| 7 | ||
| 8 | #include <linux/compiler.h> | |
| 9 | #include <linux/filter.h> | |
| 10 | #include "probe-event.h" | |
| 11 | ||
| 12 | #define BPF_PROLOGUE_MAX_ARGS 3 | |
| 13 | #define BPF_PROLOGUE_START_ARG_REG BPF_REG_3 | |
| 14 | #define BPF_PROLOGUE_FETCH_RESULT_REG BPF_REG_2 | |
| 15 | ||
| 16 | #ifdef HAVE_BPF_PROLOGUE | |
| 17 | int bpf__gen_prologue(struct probe_trace_arg *args, int nargs, | |
| 18 | struct bpf_insn *new_prog, size_t *new_cnt, | |
| 19 | size_t cnt_space); | |
| 20 | #else | |
| 21 | static inline int | |
| 22 | bpf__gen_prologue(struct probe_trace_arg *args __maybe_unused, | |
| 23 | int nargs __maybe_unused, | |
| 24 | struct bpf_insn *new_prog __maybe_unused, | |
| 25 | size_t *new_cnt, | |
| 26 | size_t cnt_space __maybe_unused) | |
| 27 | { | |
| 28 | if (!new_cnt) | |
| 29 | return -EINVAL; | |
| 30 | *new_cnt = 0; | |
| 31 | return -ENOTSUP; | |
| 32 | } | |
| 33 | #endif | |
| 34 | #endif /* __BPF_PROLOGUE_H */ |