With CONFIG_X86_KERNEL_IBT enabled the test for kprobe with offset
won't work because of the extra endbr instruction.
As suggested by Andrii adding CONFIG_X86_KERNEL_IBT detection
and using appropriate offset value based on that.
Also removing test7 program, because it does the same as test6.
Suggested-by: Andrii Nakryiko <andrii@xxxxxxxxxx>
Signed-off-by: Jiri Olsa <jolsa@xxxxxxxxxx>
---
.../bpf/prog_tests/get_func_ip_test.c | 59 +++++++++++++++----
.../selftests/bpf/progs/get_func_ip_test.c | 23 ++++----
2 files changed, 60 insertions(+), 22 deletions(-)
diff --git a/tools/testing/selftests/bpf/prog_tests/get_func_ip_test.c b/tools/testing/selftests/bpf/prog_tests/get_func_ip_test.c
index 938dbd4d7c2f..fede8ef58b5b 100644
--- a/tools/testing/selftests/bpf/prog_tests/get_func_ip_test.c
+++ b/tools/testing/selftests/bpf/prog_tests/get_func_ip_test.c
@@ -2,7 +2,7 @@
#include <test_progs.h>
#include "get_func_ip_test.skel.h"
-void test_get_func_ip_test(void)
+static void test_function_entry(void)
{
struct get_func_ip_test *skel = NULL;
int err, prog_fd;
@@ -12,14 +12,6 @@ void test_get_func_ip_test(void)
if (!ASSERT_OK_PTR(skel, "get_func_ip_test__open"))
return;
- /* test6 is x86_64 specifc because of the instruction
- * offset, disabling it for all other archs
- */
-#ifndef __x86_64__
- bpf_program__set_autoload(skel->progs.test6, false);
- bpf_program__set_autoload(skel->progs.test7, false);
-#endif
-
err = get_func_ip_test__load(skel);
if (!ASSERT_OK(err, "get_func_ip_test__load"))
goto cleanup;
@@ -43,11 +35,56 @@ void test_get_func_ip_test(void)
ASSERT_EQ(skel->bss->test3_result, 1, "test3_result");
ASSERT_EQ(skel->bss->test4_result, 1, "test4_result");
ASSERT_EQ(skel->bss->test5_result, 1, "test5_result");
+
+cleanup:
+ get_func_ip_test__destroy(skel);
+}
+
+/* test6 is x86_64 specific because of the instruction
+ * offset, disabling it for all other archs
+ */
#ifdef __x86_64__
+static void test_function_body(void)
+{
+ struct get_func_ip_test *skel = NULL;
+ LIBBPF_OPTS(bpf_test_run_opts, topts);
+ LIBBPF_OPTS(bpf_kprobe_opts, kopts);
+ struct bpf_link *link6 = NULL;
+ int err, prog_fd;
+
+ skel = get_func_ip_test__open();
+ if (!ASSERT_OK_PTR(skel, "get_func_ip_test__open"))
+ return;
+
+ bpf_program__set_autoload(skel->progs.test6, true);
+
+ err = get_func_ip_test__load(skel);
+ if (!ASSERT_OK(err, "get_func_ip_test__load"))
+ goto cleanup;
+
+ kopts.offset = skel->kconfig->CONFIG_X86_KERNEL_IBT ? 9 : 5;
+
+ link6 = bpf_program__attach_kprobe_opts(skel->progs.test6, "bpf_fentry_test6", &kopts);
+ if (!ASSERT_OK_PTR(link6, "link6"))
+ goto cleanup;
+
+ prog_fd = bpf_program__fd(skel->progs.test1);
+ err = bpf_prog_test_run_opts(prog_fd, &topts);
+ ASSERT_OK(err, "test_run");
+ ASSERT_EQ(topts.retval, 0, "test_run");
+
ASSERT_EQ(skel->bss->test6_result, 1, "test6_result");
- ASSERT_EQ(skel->bss->test7_result, 1, "test7_result");
-#endif
cleanup:
+ bpf_link__destroy(link6);
get_func_ip_test__destroy(skel);
}
+#else
+#define test_function_body()
+#endif
+
+void test_get_func_ip_test(void)
+{
+ test_function_entry();
+ test_function_body();
+}
diff --git a/tools/testing/selftests/bpf/progs/get_func_ip_test.c b/tools/testing/selftests/bpf/progs/get_func_ip_test.c
index 6db70757bc8b..8559e698b40d 100644
--- a/tools/testing/selftests/bpf/progs/get_func_ip_test.c
+++ b/tools/testing/selftests/bpf/progs/get_func_ip_test.c
@@ -2,6 +2,7 @@
#include <linux/bpf.h>
#include <bpf/bpf_helpers.h>
#include <bpf/bpf_tracing.h>
+#include <stdbool.h>
char _license[] SEC("license") = "GPL";
@@ -13,6 +14,16 @@ extern const void bpf_modify_return_test __ksym;
extern const void bpf_fentry_test6 __ksym;
extern const void bpf_fentry_test7 __ksym;
+extern bool CONFIG_X86_KERNEL_IBT __kconfig __weak;
+
+/* This function is here to have CONFIG_X86_KERNEL_IBT
+ * used and added to object BTF.
+ */
+int unused(void)
+{
+ return CONFIG_X86_KERNEL_IBT ? 0 : 1;
+}
+
__u64 test1_result = 0;
SEC("fentry/bpf_fentry_test1")
int BPF_PROG(test1, int a)
@@ -64,7 +75,7 @@ int BPF_PROG(test5, int a, int *b, int ret)
}
__u64 test6_result = 0;
-SEC("kprobe/bpf_fentry_test6+0x5")
+SEC("?kprobe")
int test6(struct pt_regs *ctx)
{
__u64 addr = bpf_get_func_ip(ctx);
@@ -72,13 +83,3 @@ int test6(struct pt_regs *ctx)
test6_result = (const void *) addr == 0;
return 0;
}
-
-__u64 test7_result = 0;
-SEC("kprobe/bpf_fentry_test7+5")
-int test7(struct pt_regs *ctx)
-{
- __u64 addr = bpf_get_func_ip(ctx);
-
- test7_result = (const void *) addr == 0;
- return 0;
-}
--
2.37.3
