By extending the syntax of BPF object section names, this patch allows
user to attach BPF programs to symbol in modules. For example:
SEC("module=i915\n"
"parse_cmds=i915_parse_cmds")
int parse_cmds(void *ctx)
{
return 1;
}
Implementation is very simple: like what 'perf probe' does, for module,
fill 'uprobe' field in 'struct perf_probe_event'. Other parts would be
done automatically.
Signed-off-by: Wang Nan <wangn...@huawei.com>
Cc: Alexei Starovoitov <a...@kernel.org>
Cc: Brendan Gregg <brendan.d.gr...@gmail.com>
Cc: Daniel Borkmann <dan...@iogearbox.net>
Cc: David Ahern <dsah...@gmail.com>
Cc: He Kuang <heku...@huawei.com>
Cc: Jiri Olsa <jo...@kernel.org>
Cc: Kaixu Xia <xiaka...@huawei.com>
Cc: Masami Hiramatsu <masami.hiramatsu...@hitachi.com>
Cc: Namhyung Kim <namhy...@kernel.org>
Cc: Paul Mackerras <pau...@samba.org>
Cc: Peter Zijlstra <a.p.zijls...@chello.nl>
Cc: Zefan Li <lize...@huawei.com>
Cc: pi3or...@163.com
Cc: Arnaldo Carvalho de Melo <a...@redhat.com>
Link:
http://lkml.kernel.org/n/1445915248-175553-1-git-send-email-wangn...@huawei.com
---
tools/perf/util/bpf-loader.c | 14 ++++++++++++++
1 file changed, 14 insertions(+)
diff --git a/tools/perf/util/bpf-loader.c b/tools/perf/util/bpf-loader.c
index 5f5505d..8d78785 100644
--- a/tools/perf/util/bpf-loader.c
+++ b/tools/perf/util/bpf-loader.c
@@ -117,6 +117,14 @@ config__exec(const char *value, struct perf_probe_event
*pev)
return 0;
}
+static int
+config__module(const char *value, struct perf_probe_event *pev)
+{
+ pev->uprobes = false;
+ pev->target = strdup(value);
+ return 0;
+}
+
static struct {
const char *key;
const char *usage;
@@ -129,6 +137,12 @@ static struct {
"Set uprobe target",
config__exec,
},
+ {
+ "module",
+ "module=<module name> ",
+ "Set kprobe module",
+ config__module,
+ }
};
static int
--
1.8.3.4
--
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