// SPDX-License-Identifier: GPL-2.0
#include "vmlinux.h"
#include <bpf/bpf_helpers.h>
#include <bpf/bpf_tracing.h>

char _license[] SEC("license") = "GPL";

extern int bpf_fentry_test1(int a) __ksym;
extern int bpf_modify_return_test(int a, int *b) __ksym;

extern const void bpf_fentry_test2 __ksym;
extern const void bpf_fentry_test3 __ksym;
extern const void bpf_fentry_test4 __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)
{
        __u64 addr = bpf_get_func_ip(ctx);

        test1_result = (const void *) addr == &bpf_fentry_test1;
        return 0;
}

__u64 test2_result = 0;
SEC("fexit/bpf_fentry_test2")
int BPF_PROG(test2, int a)
{
        __u64 addr = bpf_get_func_ip(ctx);

        test2_result = (const void *) addr == &bpf_fentry_test2;
        return 0;
}

__u64 test3_result = 0;
SEC("kprobe/bpf_fentry_test3")
int test3(struct pt_regs *ctx)
{
        __u64 addr = bpf_get_func_ip(ctx);

        test3_result = (const void *) addr == &bpf_fentry_test3;
        return 0;
}

__u64 test4_result = 0;
SEC("kretprobe/bpf_fentry_test4")
int BPF_KRETPROBE(test4)
{
        __u64 addr = bpf_get_func_ip(ctx);

        test4_result = (const void *) addr == &bpf_fentry_test4;
        return 0;
}

__u64 test5_result = 0;
SEC("fmod_ret/bpf_modify_return_test")
int BPF_PROG(test5, int a, int *b, int ret)
{
        __u64 addr = bpf_get_func_ip(ctx);

        test5_result = (const void *) addr == &bpf_modify_return_test;
        return ret;
}

__u64 test6_result = 0;
SEC("?kprobe")
int test6(struct pt_regs *ctx)
{
        __u64 addr = bpf_get_func_ip(ctx);

        test6_result = (const void *) addr == 0;
        return 0;
}

unsigned long uprobe_trigger;

__u64 test7_result = 0;
SEC("uprobe//proc/self/exe:uprobe_trigger")
int BPF_UPROBE(test7)
{
        __u64 addr = bpf_get_func_ip(ctx);

        test7_result = (const void *) addr == (const void *) uprobe_trigger;
        return 0;
}

__u64 test8_result = 0;
SEC("uretprobe//proc/self/exe:uprobe_trigger")
int BPF_URETPROBE(test8, int ret)
{
        __u64 addr = bpf_get_func_ip(ctx);

        test8_result = (const void *) addr == (const void *) uprobe_trigger;
        return 0;
}

__u64 test9_entry_result = 0;
__u64 test9_exit_result = 0;
#if defined(bpf_target_x86) || defined(bpf_target_arm64) || defined(bpf_target_riscv)
SEC("fsession/bpf_fentry_test1")
int BPF_PROG(test9, int a)
{
        __u64 addr = bpf_get_func_ip(ctx);

        if (bpf_session_is_return(ctx))
                test9_exit_result = (const void *) addr == &bpf_fentry_test1;
        else
                test9_entry_result = (const void *) addr == &bpf_fentry_test1;
        return 0;
}
#else
SEC("fentry/bpf_fentry_test1")
int BPF_PROG(test9, int a)
{
        test9_entry_result = test9_exit_result = 1;
        return 0;
}
#endif