/*
 * Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * 1. Redistributions of source code must retain the above copyright notice, this
 *    list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright notice,
 *    this list of conditions and the following disclaimer in the documentation
 *    and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#pragma once

#include <stdio.h>
#include <unistd.h>

__BEGIN_DECLS

int disown(pid_t);

int module_load(const char* path, size_t path_length);
int module_unload(const char* name, size_t name_length);

int profiling_enable(pid_t);
int profiling_disable(pid_t);

#define THREAD_PRIORITY_MIN 1
#define THREAD_PRIORITY_LOW 10
#define THREAD_PRIORITY_NORMAL 30
#define THREAD_PRIORITY_HIGH 50
#define THREAD_PRIORITY_MAX 99

#define _FUTEX_OP_SHIFT_OP 28
#define _FUTEX_OP_MASK_OP 0xf
#define _FUTEX_OP_SHIFT_CMP 24
#define _FUTEX_OP_MASK_CMP 0xf
#define _FUTEX_OP_SHIFT_OP_ARG 12
#define _FUTEX_OP_MASK_OP_ARG 0xfff
#define _FUTEX_OP_SHIFT_CMP_ARG 0
#define _FUTEX_OP_MASK_CMP_ARG 0xfff

#define FUTEX_OP(op, op_arg, cmp, cmp_arg) \
    ((((op)&_FUTEX_OP_MASK_OP) << _FUTEX_OP_SHIFT_OP) | (((cmp)&_FUTEX_OP_MASK_CMP) << _FUTEX_OP_SHIFT_CMP) | (((op_arg)&_FUTEX_OP_MASK_OP_ARG) << _FUTEX_OP_SHIFT_OP_ARG) | (((cmp_arg)&_FUTEX_OP_MASK_CMP_ARG) << _FUTEX_OP_SHIFT_CMP_ARG))

#define FUTEX_OP_SET 0
#define FUTEX_OP_ADD 1
#define FUTEX_OP_OR 2
#define FUTEX_OP_ANDN 3
#define FUTEX_OP_XOR 4
#define FUTEX_OP_ARG_SHIFT 8

#define FUTEX_OP_CMP_EQ 0
#define FUTEX_OP_CMP_NE 1
#define FUTEX_OP_CMP_LT 2
#define FUTEX_OP_CMP_LE 3
#define FUTEX_OP_CMP_GT 4
#define FUTEX_OP_CMP_GE 5

#define FUTEX_WAIT 1
#define FUTEX_WAKE 2

#define FUTEX_REQUEUE 3
#define FUTEX_CMP_REQUEUE 4
#define FUTEX_WAKE_OP 5
#define FUTEX_WAIT_BITSET 9
#define FUTEX_WAKE_BITSET 10

#define FUTEX_PRIVATE_FLAG (1 << 7)
#define FUTEX_CLOCK_REALTIME (1 << 8)
#define FUTEX_CMD_MASK ~(FUTEX_PRIVATE_FLAG | FUTEX_CLOCK_REALTIME)

#define FUTEX_BITSET_MATCH_ANY 0xffffffff

int futex(uint32_t* userspace_address, int futex_op, uint32_t value, const struct timespec* timeout, uint32_t* userspace_address2, uint32_t value3);

#define PURGE_ALL_VOLATILE 0x1
#define PURGE_ALL_CLEAN_INODE 0x2

int purge(int mode);

#define PERF_EVENT_SAMPLE 0
#define PERF_EVENT_MALLOC 1
#define PERF_EVENT_FREE 2

int perf_event(int type, uintptr_t arg1, uintptr_t arg2);

int get_stack_bounds(uintptr_t* user_stack_base, size_t* user_stack_size);

int anon_create(size_t size, int options);

#ifdef __i386__
ALWAYS_INLINE void send_secret_data_to_userspace_emulator(uintptr_t data1, uintptr_t data2, uintptr_t data3)
{
    asm volatile(
        ".byte 0xd6\n"
        ".byte 0xd6\n" ::
            : "eax");
    asm volatile(
        "push %%eax\n"
        "push %%ecx\n"
        "push %%edx\n"
        "pop %%edx\n"
        "pop %%ecx\n"
        "pop %%eax\n" ::"a"(data1),
        "c"(data2), "d"(data3)
        : "memory");
}
#elif __x86_64__
ALWAYS_INLINE void send_secret_data_to_userspace_emulator(uintptr_t, uintptr_t, uintptr_t)
{
}
#endif

__END_DECLS