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

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[ Upstream commit d8ef45d66c ]

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: 64836248dd ("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>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Yipeng Zou 2022-09-19 20:56:29 +08:00 committed by Greg Kroah-Hartman
parent 867fce09aa
commit 84795de93e
1 changed files with 43 additions and 4 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

47
kernel/trace/kprobe_event_gen_test.c
View file

@ -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;