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// SPDX-License-Identifier: GPL-2.0
#define _GNU_SOURCE
#include <test_progs.h>
#include "test_task_pt_regs.skel.h"
/* uprobe attach point */
static noinline void trigger_func(void)
{
asm volatile ("");
}
void test_task_pt_regs(void)
{
struct test_task_pt_regs *skel;
struct bpf_link *uprobe_link;
ssize_t uprobe_offset;
bool match;
uprobe_offset = get_uprobe_offset(&trigger_func);
if (!ASSERT_GE(uprobe_offset, 0, "uprobe_offset"))
return;
skel = test_task_pt_regs__open_and_load();
if (!ASSERT_OK_PTR(skel, "skel_open"))
return;
if (!ASSERT_OK_PTR(skel->bss, "check_bss"))
goto cleanup;
uprobe_link = bpf_program__attach_uprobe(skel->progs.handle_uprobe,
false /* retprobe */,
0 /* self pid */,
"/proc/self/exe",
uprobe_offset);
if (!ASSERT_OK_PTR(uprobe_link, "attach_uprobe"))
goto cleanup;
skel->links.handle_uprobe = uprobe_link;
/* trigger & validate uprobe */
trigger_func();
if (!ASSERT_EQ(skel->bss->uprobe_res, 1, "check_uprobe_res"))
goto cleanup;
match = !memcmp(&skel->bss->current_regs, &skel->bss->ctx_regs,
sizeof(skel->bss->current_regs));
ASSERT_TRUE(match, "check_regs_match");
cleanup:
test_task_pt_regs__destroy(skel);
}
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