qemu/bsd-user/freebsd/os-syscall.c

/*
 *  BSD syscalls
 *
 *  Copyright (c) 2003-2008 Fabrice Bellard
 *  Copyright (c) 2013-2014 Stacey D. Son
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, see <http://www.gnu.org/licenses/>.
 */

/*
 * We need the FreeBSD "legacy" definitions. Rust needs the FreeBSD 11 system
 * calls since it doesn't use libc at all, so we have to emulate that despite
 * FreeBSD 11 being EOL'd.
 */
#define _WANT_FREEBSD11_STAT
#define _WANT_FREEBSD11_STATFS
#define _WANT_FREEBSD11_DIRENT
#define _WANT_KERNEL_ERRNO
#define _WANT_SEMUN
#include "qemu/osdep.h"
#include "qemu/cutils.h"
#include "qemu/path.h"
#include <sys/syscall.h>
#include <sys/param.h>
#include <sys/sysctl.h>
#include <utime.h>

#include "qemu.h"
#include "signal-common.h"
#include "user/syscall-trace.h"

#include "bsd-file.h"

void target_set_brk(abi_ulong new_brk)
{
}

/*
 * errno conversion.
 */
abi_long get_errno(abi_long ret)
{
    if (ret == -1) {
        return -host_to_target_errno(errno);
    } else {
        return ret;
    }
}

int host_to_target_errno(int err)
{
    /*
     * All the BSDs have the property that the error numbers are uniform across
     * all architectures for a given BSD, though they may vary between different
     * BSDs.
     */
    return err;
}

bool is_error(abi_long ret)
{
    return (abi_ulong)ret >= (abi_ulong)(-4096);
}

/*
 * do_syscall() should always have a single exit point at the end so that
 * actions, such as logging of syscall results, can be performed.  All errnos
 * that do_syscall() returns must be -TARGET_<errcode>.
 */
abi_long do_freebsd_syscall(void *cpu_env, int num, abi_long arg1,
                            abi_long arg2, abi_long arg3, abi_long arg4,
                            abi_long arg5, abi_long arg6, abi_long arg7,
                            abi_long arg8)
{
    return 0;
}

void syscall_init(void)
{
}