1 // SPDX-License-Identifier: GPL-2.0
2 #define _GNU_SOURCE
3 #include <test_progs.h>
4 #include "test_task_pt_regs.skel.h"
5
6 /* uprobe attach point */
trigger_func(void)7 static noinline void trigger_func(void)
8 {
9 asm volatile ("");
10 }
11
test_task_pt_regs(void)12 void test_task_pt_regs(void)
13 {
14 struct test_task_pt_regs *skel;
15 struct bpf_link *uprobe_link;
16 ssize_t uprobe_offset;
17 bool match;
18
19 uprobe_offset = get_uprobe_offset(&trigger_func);
20 if (!ASSERT_GE(uprobe_offset, 0, "uprobe_offset"))
21 return;
22
23 skel = test_task_pt_regs__open_and_load();
24 if (!ASSERT_OK_PTR(skel, "skel_open"))
25 return;
26 if (!ASSERT_OK_PTR(skel->bss, "check_bss"))
27 goto cleanup;
28
29 uprobe_link = bpf_program__attach_uprobe(skel->progs.handle_uprobe,
30 false /* retprobe */,
31 0 /* self pid */,
32 "/proc/self/exe",
33 uprobe_offset);
34 if (!ASSERT_OK_PTR(uprobe_link, "attach_uprobe"))
35 goto cleanup;
36 skel->links.handle_uprobe = uprobe_link;
37
38 /* trigger & validate uprobe */
39 trigger_func();
40
41 if (!ASSERT_EQ(skel->bss->uprobe_res, 1, "check_uprobe_res"))
42 goto cleanup;
43
44 match = !memcmp(&skel->bss->current_regs, &skel->bss->ctx_regs,
45 sizeof(skel->bss->current_regs));
46 ASSERT_TRUE(match, "check_regs_match");
47
48 cleanup:
49 test_task_pt_regs__destroy(skel);
50 }
51