tracing: kprobe: Make gen test module work in arm and riscv

For now, this selftest module can only work in x86 because of the
kprobe cmd was fixed use of x86 registers.
This patch adapted to register names under arm and riscv, So that
this module can be worked on those platform.

Link: https://lkml.kernel.org/r/20220919125629.238242-3-zouyipeng@huawei.com
Cc: <linux-riscv@lists.infradead.org>
Cc: <mingo@redhat.com>
Cc: <paul.walmsley@sifive.com>
Cc: <palmer@dabbelt.com>
Cc: <aou@eecs.berkeley.edu>
Cc: <zanussi@kernel.org>
Cc: <liaochang1@huawei.com>
Cc: <chris.zjh@huawei.com>
Fixes: c07be05c2d05 ("tracing: Add kprobe event command generation test module")
Signed-off-by: Yipeng Zou <zouyipeng@huawei.com>
Acked-by: Masami Hiramatsu (Google) <mhiramat@kernel.org>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>

diff --git a/kernel/trace/kprobe_event_gen_test.c b/kernel/trace/kprobe_event_gen_test.c
index e023154be0f856e58d2fd42c8c3cbbc4b6ea266b..80e04a1e19772ae7cd4cecdc544f9ebaa1fd0e6b 100644 (file)
--- a/kernel/trace/kprobe_event_gen_test.c
+++ b/kernel/trace/kprobe_event_gen_test.c
@@ -35,6 +35,45 @@
 static struct trace_event_file *gen_kprobe_test;
 static struct trace_event_file *gen_kretprobe_test;
 
+#define KPROBE_GEN_TEST_FUNC   "do_sys_open"
+
+/* X86 */
+#if defined(CONFIG_X86_64) || defined(CONFIG_X86_32)
+#define KPROBE_GEN_TEST_ARG0   "dfd=%ax"
+#define KPROBE_GEN_TEST_ARG1   "filename=%dx"
+#define KPROBE_GEN_TEST_ARG2   "flags=%cx"
+#define KPROBE_GEN_TEST_ARG3   "mode=+4($stack)"
+
+/* ARM64 */
+#elif defined(CONFIG_ARM64)
+#define KPROBE_GEN_TEST_ARG0   "dfd=%x0"
+#define KPROBE_GEN_TEST_ARG1   "filename=%x1"
+#define KPROBE_GEN_TEST_ARG2   "flags=%x2"
+#define KPROBE_GEN_TEST_ARG3   "mode=%x3"
+
+/* ARM */
+#elif defined(CONFIG_ARM)
+#define KPROBE_GEN_TEST_ARG0   "dfd=%r0"
+#define KPROBE_GEN_TEST_ARG1   "filename=%r1"
+#define KPROBE_GEN_TEST_ARG2   "flags=%r2"
+#define KPROBE_GEN_TEST_ARG3   "mode=%r3"
+
+/* RISCV */
+#elif defined(CONFIG_RISCV)
+#define KPROBE_GEN_TEST_ARG0   "dfd=%a0"
+#define KPROBE_GEN_TEST_ARG1   "filename=%a1"
+#define KPROBE_GEN_TEST_ARG2   "flags=%a2"
+#define KPROBE_GEN_TEST_ARG3   "mode=%a3"
+
+/* others */
+#else
+#define KPROBE_GEN_TEST_ARG0   NULL
+#define KPROBE_GEN_TEST_ARG1   NULL
+#define KPROBE_GEN_TEST_ARG2   NULL
+#define KPROBE_GEN_TEST_ARG3   NULL
+#endif
+
+
 /*
  * Test to make sure we can create a kprobe event, then add more
  * fields.
@@ -58,14 +97,14 @@ static int __init test_gen_kprobe_cmd(void)
         * fields.
         */
        ret = kprobe_event_gen_cmd_start(&cmd, "gen_kprobe_test",
-                                        "do_sys_open",
-                                        "dfd=%ax", "filename=%dx");
+                                        KPROBE_GEN_TEST_FUNC,
+                                        KPROBE_GEN_TEST_ARG0, KPROBE_GEN_TEST_ARG1);
        if (ret)
                goto free;
 
        /* Use kprobe_event_add_fields to add the rest of the fields */
 
-       ret = kprobe_event_add_fields(&cmd, "flags=%cx", "mode=+4($stack)");
+       ret = kprobe_event_add_fields(&cmd, KPROBE_GEN_TEST_ARG2, KPROBE_GEN_TEST_ARG3);
        if (ret)
                goto free;
 
@@ -128,7 +167,7 @@ static int __init test_gen_kretprobe_cmd(void)
         * Define the kretprobe event.
         */
        ret = kretprobe_event_gen_cmd_start(&cmd, "gen_kretprobe_test",
-                                           "do_sys_open",
+                                           KPROBE_GEN_TEST_FUNC,
                                            "$retval");
        if (ret)
                goto free;