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authorSong Chen <chensong_2000@189.cn>2022-12-30 14:33:53 +0800
committerMasami Hiramatsu (Google) <mhiramat@kernel.org>2023-02-24 10:04:13 +0900
commitbd78acc89d4147aa4897a4c43e2a74c7df999b12 (patch)
tree326f886571f1265d2e591241ba75c46073bb2d24 /kernel/trace/trace_kprobe.c
parentkernel/trace: Provide default impelentations defined in trace_probe_tmpl.h (diff)
downloadwireguard-linux-bd78acc89d4147aa4897a4c43e2a74c7df999b12.tar.xz
wireguard-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_kprobe.c')
-rw-r--r--kernel/trace/trace_kprobe.c14
1 files changed, 4 insertions, 10 deletions
diff --git a/kernel/trace/trace_kprobe.c b/kernel/trace/trace_kprobe.c
index d32c6244ef99..59cda19a9033 100644
--- a/kernel/trace/trace_kprobe.c
+++ b/kernel/trace/trace_kprobe.c
@@ -1225,6 +1225,7 @@ process_fetch_insn(struct fetch_insn *code, void *rec, void *dest,
{
struct pt_regs *regs = rec;
unsigned long val;
+ int ret;
retry:
/* 1st stage: get value from context */
@@ -1241,15 +1242,6 @@ retry:
case FETCH_OP_RETVAL:
val = regs_return_value(regs);
break;
- 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;
#ifdef CONFIG_HAVE_FUNCTION_ARG_ACCESS_API
case FETCH_OP_ARG:
val = regs_get_kernel_argument(regs, code->param);
@@ -1259,7 +1251,9 @@ retry:
code++;
goto retry;
default:
- return -EILSEQ;
+ ret = process_common_fetch_insn(code, &val);
+ if (ret < 0)
+ return ret;
}
code++;