/* SPDX-License-Identifier: LGPL-2.1 OR MIT */
/*
 * mm definition for NOLIBC
 * Copyright (C) 2017-2021 Willy Tarreau <w@1wt.eu>
 */

/* make sure to include all global symbols */
#include "../nolibc.h"

#ifndef _NOLIBC_SYS_MMAN_H
#define _NOLIBC_SYS_MMAN_H

#include "../arch.h"
#include "../sys.h"

#ifndef sys_mmap
static __attribute__((unused))
void *sys_mmap(void *addr, size_t length, int prot, int flags, int fd,
               off_t offset)
{
        int n;

#if defined(__NR_mmap2)
        n = __NR_mmap2;
        offset >>= 12;
#else
        n = __NR_mmap;
#endif

        return (void *)my_syscall6(n, addr, length, prot, flags, fd, offset);
}
#endif

static __attribute__((unused))
void *mmap(void *addr, size_t length, int prot, int flags, int fd, off_t offset)
{
        void *ret = sys_mmap(addr, length, prot, flags, fd, offset);

        if ((unsigned long)ret >= -4095UL) {
                SET_ERRNO(-(long)ret);
                ret = MAP_FAILED;
        }
        return ret;
}

static __attribute__((unused))
void *sys_mremap(void *old_address, size_t old_size, size_t new_size, int flags, void *new_address)
{
        return (void *)my_syscall5(__NR_mremap, old_address, old_size,
                                   new_size, flags, new_address);
}

static __attribute__((unused))
void *mremap(void *old_address, size_t old_size, size_t new_size, int flags, void *new_address)
{
        void *ret = sys_mremap(old_address, old_size, new_size, flags, new_address);

        if ((unsigned long)ret >= -4095UL) {
                SET_ERRNO(-(long)ret);
                ret = MAP_FAILED;
        }
        return ret;
}

static __attribute__((unused))
int sys_munmap(void *addr, size_t length)
{
        return my_syscall2(__NR_munmap, addr, length);
}

static __attribute__((unused))
int munmap(void *addr, size_t length)
{
        return __sysret(sys_munmap(addr, length));
}

#endif /* _NOLIBC_SYS_MMAN_H */