diff options
| author | Song Chen <chensong_2000@189.cn> | 2022-12-30 07:33:53 +0100 |
|---|---|---|
| committer | Masami Hiramatsu (Google) <mhiramat@kernel.org> | 2023-02-24 02:04:13 +0100 |
| commit | bd78acc89d4147aa4897a4c43e2a74c7df999b12 (patch) | |
| tree | 326f886571f1265d2e591241ba75c46073bb2d24 /kernel/trace/trace_probe_tmpl.h | |
| parent | kernel/trace: Provide default impelentations defined in trace_probe_tmpl.h (diff) | |
| download | linux-bd78acc89d4147aa4897a4c43e2a74c7df999b12.tar.xz linux-bd78acc89d4147aa4897a4c43e2a74c7df999b12.zip | |
kernel/trace: extract common part in process_fetch_insn
Each probe has an instance of process_fetch_insn respectively,
but they have something in common.
This patch aims to extract the common part into
process_common_fetch_insn which can be shared by each probe,
and they only need to focus on their special cases.
Signed-off-by: Song Chen <chensong_2000@189.cn>
Suggested-by: Masami Hiramatsu <mhiramat@kernel.org>
Acked-by: Masami Hiramatsu <mhiramat@kernel.org>
Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
Diffstat (limited to 'kernel/trace/trace_probe_tmpl.h')
| -rw-r--r-- | kernel/trace/trace_probe_tmpl.h | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/kernel/trace/trace_probe_tmpl.h b/kernel/trace/trace_probe_tmpl.h index bd3e755434eb..00707630788d 100644 --- a/kernel/trace/trace_probe_tmpl.h +++ b/kernel/trace/trace_probe_tmpl.h @@ -98,6 +98,26 @@ fetch_store_symstring(unsigned long addr, void *dest, void *base) return sprint_symbol(__dest, addr); } +/* common part of process_fetch_insn*/ +static nokprobe_inline int +process_common_fetch_insn(struct fetch_insn *code, unsigned long *val) +{ + switch (code->op) { + case FETCH_OP_IMM: + *val = code->immediate; + break; + case FETCH_OP_COMM: + *val = (unsigned long)current->comm; + break; + case FETCH_OP_DATA: + *val = (unsigned long)code->data; + break; + default: + return -EILSEQ; + } + return 0; +} + /* From the 2nd stage, routine is same */ static nokprobe_inline int process_fetch_insn_bottom(struct fetch_insn *code, unsigned long val, |