// SPDX-License-Identifier: GPL-2.0-only OR MIT
/*
 * Copyright (C) 2023 The Falco Authors.
 *
 * This file is dual licensed under either the MIT or GPL 2. See MIT.txt
 * or GPL2.txt for full copies of the license.
 */

#include <helpers/interfaces/fixed_size_event.h>
#include <helpers/interfaces/variable_size_event.h>

/*=============================== EXIT EVENT ===========================*/

SEC("tp_btf/sys_exit")
int BPF_PROG(finit_module_x, struct pt_regs *regs, long ret) {
	struct auxiliary_map *auxmap = auxmap__get();
	if(!auxmap) {
		return 0;
	}

	auxmap__preload_event_header(auxmap, PPME_SYSCALL_FINIT_MODULE_X);

	/*=============================== COLLECT PARAMETERS  ===========================*/

	/* Parameter 1: ret (type: PT_ERRNO) */
	auxmap__store_s64_param(auxmap, ret);

	/* Parameter 2: fd (type: PT_FD) */
	int32_t fd = (int32_t)extract__syscall_argument(regs, 0);
	auxmap__store_s64_param(auxmap, (int64_t)fd);

	/* Parameter 3: uargs (type: PT_CHARBUF) */
	unsigned long uargs_ptr = extract__syscall_argument(regs, 1);
	auxmap__store_charbuf_param(auxmap, uargs_ptr, MAX_PROC_ARG_ENV, USER);

	/* Parameter 4: flags (type: PT_FLAGS32) */
	uint32_t flags = extract__syscall_argument(regs, 2);
	auxmap__store_s32_param(auxmap, finit_module_flags_to_scap(flags));

	/*=============================== COLLECT PARAMETERS  ===========================*/

	auxmap__finalize_event_header(auxmap);

	auxmap__submit_event(auxmap);

	return 0;
}

/*=============================== EXIT EVENT ===========================*/
