Commit d8ef45d6 authored by Yipeng Zou's avatar Yipeng Zou Committed by Steven Rostedt (Google)
Browse files

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: 64836248 ("tracing: Add kprobe event command generation test module")
Signed-off-by: default avatarYipeng Zou <zouyipeng@huawei.com>
Acked-by: default avatarMasami Hiramatsu (Google) <mhiramat@kernel.org>
Signed-off-by: default avatarSteven Rostedt (Google) <rostedt@goodmis.org>
parent ac48e189

kernel/trace/kprobe_event_gen_test.c

+43 −4
Original line number Diff line number Diff line
@@ -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;