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

   1/*
   2 *  BSD syscalls
   3 *
   4 *  Copyright (c) 2003-2008 Fabrice Bellard
   5 *  Copyright (c) 2013-2014 Stacey D. Son
   6 *
   7 *  This program is free software; you can redistribute it and/or modify
   8 *  it under the terms of the GNU General Public License as published by
   9 *  the Free Software Foundation; either version 2 of the License, or
  10 *  (at your option) any later version.
  11 *
  12 *  This program is distributed in the hope that it will be useful,
  13 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 *  GNU General Public License for more details.
  16 *
  17 *  You should have received a copy of the GNU General Public License
  18 *  along with this program; if not, see <http://www.gnu.org/licenses/>.
  19 */
  20
  21/*
  22 * We need the FreeBSD "legacy" definitions. Rust needs the FreeBSD 11 system
  23 * calls since it doesn't use libc at all, so we have to emulate that despite
  24 * FreeBSD 11 being EOL'd.
  25 */
  26#define _WANT_FREEBSD11_STAT
  27#define _WANT_FREEBSD11_STATFS
  28#define _WANT_FREEBSD11_DIRENT
  29#define _WANT_KERNEL_ERRNO
  30#define _WANT_SEMUN
  31#include "qemu/osdep.h"
  32#include "qemu/cutils.h"
  33#include "qemu/path.h"
  34#include <sys/syscall.h>
  35#include <sys/param.h>
  36#include <sys/sysctl.h>
  37#include <utime.h>
  38
  39#include "qemu.h"
  40#include "qemu-common.h"
  41#include "signal-common.h"
  42#include "user/syscall-trace.h"
  43
  44#include "bsd-file.h"
  45
  46void target_set_brk(abi_ulong new_brk)
  47{
  48}
  49
  50/*
  51 * errno conversion.
  52 */
  53abi_long get_errno(abi_long ret)
  54{
  55    if (ret == -1) {
  56        return -host_to_target_errno(errno);
  57    } else {
  58        return ret;
  59    }
  60}
  61
  62int host_to_target_errno(int err)
  63{
  64    /*
  65     * All the BSDs have the property that the error numbers are uniform across
  66     * all architectures for a given BSD, though they may vary between different
  67     * BSDs.
  68     */
  69    return err;
  70}
  71
  72bool is_error(abi_long ret)
  73{
  74    return (abi_ulong)ret >= (abi_ulong)(-4096);
  75}
  76
  77/*
  78 * do_syscall() should always have a single exit point at the end so that
  79 * actions, such as logging of syscall results, can be performed.  All errnos
  80 * that do_syscall() returns must be -TARGET_<errcode>.
  81 */
  82abi_long do_freebsd_syscall(void *cpu_env, int num, abi_long arg1,
  83                            abi_long arg2, abi_long arg3, abi_long arg4,
  84                            abi_long arg5, abi_long arg6, abi_long arg7,
  85                            abi_long arg8)
  86{
  87    return 0;
  88}
  89
  90void syscall_init(void)
  91{
  92}
  93