xref: /openbmc/qemu/bsd-user/freebsd/os-misc.h (revision 182ea728)
1 /*
2  *  miscellaneous FreeBSD system call shims
3  *
4  *  Copyright (c) 2013-14 Stacey D. Son
5  *
6  *  This program is free software; you can redistribute it and/or modify
7  *  it under the terms of the GNU General Public License as published by
8  *  the Free Software Foundation; either version 2 of the License, or
9  *  (at your option) any later version.
10  *
11  *  This program is distributed in the hope that it will be useful,
12  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
13  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14  *  GNU General Public License for more details.
15  *
16  *  You should have received a copy of the GNU General Public License
17  *  along with this program; if not, see <http://www.gnu.org/licenses/>.
18  */
19 
20 #ifndef OS_MISC_H
21 #define OS_MISC_H
22 
23 #include <sys/cpuset.h>
24 #include <sys/random.h>
25 #include <sched.h>
26 
27 /*
28  * shm_open2 isn't exported, but the __sys_ alias is. We can use either for the
29  * static version, but to dynamically link we have to use the sys version.
30  */
31 int __sys_shm_open2(const char *path, int flags, mode_t mode, int shmflags,
32     const char *);
33 
34 #if defined(__FreeBSD_version) && __FreeBSD_version >= 1300048
35 /* shm_open2(2) */
do_freebsd_shm_open2(abi_ulong pathptr,abi_ulong flags,abi_long mode,abi_ulong shmflags,abi_ulong nameptr)36 static inline abi_long do_freebsd_shm_open2(abi_ulong pathptr, abi_ulong flags,
37     abi_long mode, abi_ulong shmflags, abi_ulong nameptr)
38 {
39     int ret;
40     void *uname, *upath;
41 
42     if (pathptr == (uintptr_t)SHM_ANON) {
43         upath = SHM_ANON;
44     } else {
45         upath = lock_user_string(pathptr);
46         if (upath == NULL) {
47             return -TARGET_EFAULT;
48         }
49     }
50 
51     uname = NULL;
52     if (nameptr != 0) {
53         uname = lock_user_string(nameptr);
54         if (uname == NULL) {
55             unlock_user(upath, pathptr, 0);
56             return -TARGET_EFAULT;
57         }
58     }
59     ret = get_errno(__sys_shm_open2(upath,
60                 target_to_host_bitmask(flags, fcntl_flags_tbl), mode,
61                 target_to_host_bitmask(shmflags, shmflag_flags_tbl), uname));
62 
63     if (upath != SHM_ANON) {
64         unlock_user(upath, pathptr, 0);
65     }
66     if (uname != NULL) {
67         unlock_user(uname, nameptr, 0);
68     }
69     return ret;
70 }
71 #endif /* __FreeBSD_version >= 1300048 */
72 
73 #if defined(__FreeBSD_version) && __FreeBSD_version >= 1300049
74 /* shm_rename(2) */
do_freebsd_shm_rename(abi_ulong fromptr,abi_ulong toptr,abi_ulong flags)75 static inline abi_long do_freebsd_shm_rename(abi_ulong fromptr, abi_ulong toptr,
76         abi_ulong flags)
77 {
78     int ret;
79     void *ufrom, *uto;
80 
81     ufrom = lock_user_string(fromptr);
82     if (ufrom == NULL) {
83         return -TARGET_EFAULT;
84     }
85     uto = lock_user_string(toptr);
86     if (uto == NULL) {
87         unlock_user(ufrom, fromptr, 0);
88         return -TARGET_EFAULT;
89     }
90     ret = get_errno(shm_rename(ufrom, uto, flags));
91     unlock_user(ufrom, fromptr, 0);
92     unlock_user(uto, toptr, 0);
93 
94     return ret;
95 }
96 #endif /* __FreeBSD_version >= 1300049 */
97 
98 #endif /* OS_MISC_H */
99