// SPDX-License-Identifier: GPL-2.0+

#include <linux/kernel.h>
#include <linux/kprobes.h>
#include <linux/random.h>
#include <kunit/test.h>
#include "test_kprobes.h"

static struct kprobe kp;

static void setup_kprobe(struct kunit *test, struct kprobe *kp,
                         const char *symbol, int offset)
{
        kp->offset = offset;
        kp->addr = NULL;
        kp->symbol_name = symbol;
}

static void test_kprobe_offset(struct kunit *test, struct kprobe *kp,
                               const char *target, int offset)
{
        int ret;

        setup_kprobe(test, kp, target, 0);
        ret = register_kprobe(kp);
        if (!ret)
                unregister_kprobe(kp);
        KUNIT_EXPECT_EQ(test, 0, ret);
        setup_kprobe(test, kp, target, offset);
        ret = register_kprobe(kp);
        KUNIT_EXPECT_EQ(test, -EINVAL, ret);
        if (!ret)
                unregister_kprobe(kp);
}

static void test_kprobe_odd(struct kunit *test)
{
        test_kprobe_offset(test, &kp, "kprobes_target_odd",
                           kprobes_target_odd_offs);
}

static void test_kprobe_in_insn4(struct kunit *test)
{
        test_kprobe_offset(test, &kp, "kprobes_target_in_insn4",
                           kprobes_target_in_insn4_offs);
}

static void test_kprobe_in_insn6_lo(struct kunit *test)
{
        test_kprobe_offset(test, &kp, "kprobes_target_in_insn6_lo",
                           kprobes_target_in_insn6_lo_offs);
}

static void test_kprobe_in_insn6_hi(struct kunit *test)
{
        test_kprobe_offset(test, &kp, "kprobes_target_in_insn6_hi",
                           kprobes_target_in_insn6_hi_offs);
}

static struct kunit_case kprobes_testcases[] = {
        KUNIT_CASE(test_kprobe_odd),
        KUNIT_CASE(test_kprobe_in_insn4),
        KUNIT_CASE(test_kprobe_in_insn6_lo),
        KUNIT_CASE(test_kprobe_in_insn6_hi),
        {}
};

static struct kunit_suite kprobes_test_suite = {
        .name = "kprobes_test_s390",
        .test_cases = kprobes_testcases,
};

kunit_test_suites(&kprobes_test_suite);

MODULE_DESCRIPTION("KUnit tests for kprobes");
MODULE_LICENSE("GPL");