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