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 */
7static noinline void trigger_func(void)
8{
9	asm volatile ("");
10}
11
12void 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
48cleanup:
49	test_task_pt_regs__destroy(skel);
50}
51