| 1 | /* |
| 2 | * miscellaneous FreeBSD system call shims |
| 3 | * |
| 4 | * Copyright (c) 2013-2014 Stacey D. Son |
| 5 | * |
| 6 | * SPDX-License-Identifier: GPL-2.0-or-later |
| 7 | */ |
| 8 | #ifndef OS_MISC_H |
| 9 | #define OS_MISC_H |
| 10 | |
| 11 | #include <sys/cpuset.h> |
| 12 | #include <sys/random.h> |
| 13 | #include <sched.h> |
| 14 | |
| 15 | /* |
| 16 | * shm_open2 isn't exported, but the __sys_ alias is. We can use either for the |
| 17 | * static version, but to dynamically link we have to use the sys version. |
| 18 | */ |
| 19 | int __sys_shm_open2(const char *path, int flags, mode_t mode, int shmflags, |
| 20 | const char *); |
| 21 | |
| 22 | #if defined(__FreeBSD_version) && __FreeBSD_version >= 1300048 |
| 23 | /* shm_open2(2) */ |
| 24 | static inline abi_long do_freebsd_shm_open2(abi_ulong pathptr, abi_ulong flags, |
| 25 | abi_long mode, abi_ulong shmflags, abi_ulong nameptr) |
| 26 | { |
| 27 | int ret; |
| 28 | void *uname, *upath; |
| 29 | |
| 30 | if (pathptr == (uintptr_t)SHM_ANON) { |
| 31 | upath = SHM_ANON; |
| 32 | } else { |
| 33 | upath = lock_user_string(pathptr); |
| 34 | if (upath == NULL) { |
| 35 | return -TARGET_EFAULT; |
| 36 | } |
| 37 | } |
| 38 | |
| 39 | uname = NULL; |
| 40 | if (nameptr != 0) { |
| 41 | uname = lock_user_string(nameptr); |
| 42 | if (uname == NULL) { |
| 43 | unlock_user(upath, pathptr, 0); |
| 44 | return -TARGET_EFAULT; |
| 45 | } |
| 46 | } |
| 47 | ret = get_errno(__sys_shm_open2(upath, |
| 48 | target_to_host_bitmask(flags, fcntl_flags_tbl), mode, |
| 49 | target_to_host_bitmask(shmflags, shmflag_flags_tbl), uname)); |
| 50 | |
| 51 | if (upath != SHM_ANON) { |
| 52 | unlock_user(upath, pathptr, 0); |
| 53 | } |
| 54 | if (uname != NULL) { |
| 55 | unlock_user(uname, nameptr, 0); |
| 56 | } |
| 57 | return ret; |
| 58 | } |
| 59 | #endif /* __FreeBSD_version >= 1300048 */ |
| 60 | |
| 61 | #if defined(__FreeBSD_version) && __FreeBSD_version >= 1300049 |
| 62 | /* shm_rename(2) */ |
| 63 | static inline abi_long do_freebsd_shm_rename(abi_ulong fromptr, abi_ulong toptr, |
| 64 | abi_ulong flags) |
| 65 | { |
| 66 | int ret; |
| 67 | void *ufrom, *uto; |
| 68 | |
| 69 | ufrom = lock_user_string(fromptr); |
| 70 | if (ufrom == NULL) { |
| 71 | return -TARGET_EFAULT; |
| 72 | } |
| 73 | uto = lock_user_string(toptr); |
| 74 | if (uto == NULL) { |
| 75 | unlock_user(ufrom, fromptr, 0); |
| 76 | return -TARGET_EFAULT; |
| 77 | } |
| 78 | ret = get_errno(shm_rename(ufrom, uto, flags)); |
| 79 | unlock_user(ufrom, fromptr, 0); |
| 80 | unlock_user(uto, toptr, 0); |
| 81 | |
| 82 | return ret; |
| 83 | } |
| 84 | #endif /* __FreeBSD_version >= 1300049 */ |
| 85 | |
| 86 | #endif /* OS_MISC_H */ |