Commit | Line | Data |
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baed7fc9 CH |
1 | /* |
2 | * sys_ipc() is the old de-multiplexer for the SysV IPC calls. | |
3 | * | |
4 | * This is really horribly ugly, and new architectures should just wire up | |
5 | * the individual syscalls instead. | |
6 | */ | |
7 | #include <linux/unistd.h> | |
20bc2a3a | 8 | #include <linux/syscalls.h> |
baed7fc9 CH |
9 | |
10 | #ifdef __ARCH_WANT_SYS_IPC | |
11 | #include <linux/errno.h> | |
12 | #include <linux/ipc.h> | |
13 | #include <linux/shm.h> | |
baed7fc9 CH |
14 | #include <linux/uaccess.h> |
15 | ||
45575f5a | 16 | SYSCALL_DEFINE6(ipc, unsigned int, call, int, first, unsigned long, second, |
baed7fc9 CH |
17 | unsigned long, third, void __user *, ptr, long, fifth) |
18 | { | |
19 | int version, ret; | |
20 | ||
21 | version = call >> 16; /* hack for backward compatibility */ | |
22 | call &= 0xffff; | |
23 | ||
24 | switch (call) { | |
25 | case SEMOP: | |
26 | return sys_semtimedop(first, (struct sembuf __user *)ptr, | |
27 | second, NULL); | |
28 | case SEMTIMEDOP: | |
29 | return sys_semtimedop(first, (struct sembuf __user *)ptr, | |
30 | second, | |
31 | (const struct timespec __user *)fifth); | |
32 | ||
33 | case SEMGET: | |
34 | return sys_semget(first, second, third); | |
35 | case SEMCTL: { | |
e1fd1f49 | 36 | unsigned long arg; |
baed7fc9 CH |
37 | if (!ptr) |
38 | return -EINVAL; | |
e1fd1f49 | 39 | if (get_user(arg, (unsigned long __user *) ptr)) |
baed7fc9 | 40 | return -EFAULT; |
e1fd1f49 | 41 | return sys_semctl(first, second, third, arg); |
baed7fc9 CH |
42 | } |
43 | ||
44 | case MSGSND: | |
45 | return sys_msgsnd(first, (struct msgbuf __user *) ptr, | |
46 | second, third); | |
47 | case MSGRCV: | |
48 | switch (version) { | |
49 | case 0: { | |
50 | struct ipc_kludge tmp; | |
51 | if (!ptr) | |
52 | return -EINVAL; | |
53 | ||
54 | if (copy_from_user(&tmp, | |
55 | (struct ipc_kludge __user *) ptr, | |
56 | sizeof(tmp))) | |
57 | return -EFAULT; | |
58 | return sys_msgrcv(first, tmp.msgp, second, | |
59 | tmp.msgtyp, third); | |
60 | } | |
61 | default: | |
62 | return sys_msgrcv(first, | |
63 | (struct msgbuf __user *) ptr, | |
64 | second, fifth, third); | |
65 | } | |
66 | case MSGGET: | |
67 | return sys_msgget((key_t) first, second); | |
68 | case MSGCTL: | |
69 | return sys_msgctl(first, second, (struct msqid_ds __user *)ptr); | |
70 | ||
71 | case SHMAT: | |
72 | switch (version) { | |
73 | default: { | |
74 | unsigned long raddr; | |
75 | ret = do_shmat(first, (char __user *)ptr, | |
079a96ae | 76 | second, &raddr, SHMLBA); |
baed7fc9 CH |
77 | if (ret) |
78 | return ret; | |
79 | return put_user(raddr, (unsigned long __user *) third); | |
80 | } | |
81 | case 1: | |
82 | /* | |
83 | * This was the entry point for kernel-originating calls | |
84 | * from iBCS2 in 2.2 days. | |
85 | */ | |
86 | return -EINVAL; | |
87 | } | |
88 | case SHMDT: | |
89 | return sys_shmdt((char __user *)ptr); | |
90 | case SHMGET: | |
91 | return sys_shmget(first, second, third); | |
92 | case SHMCTL: | |
93 | return sys_shmctl(first, second, | |
94 | (struct shmid_ds __user *) ptr); | |
95 | default: | |
96 | return -ENOSYS; | |
97 | } | |
98 | } | |
99 | #endif | |
20bc2a3a AV |
100 | |
101 | #ifdef CONFIG_COMPAT | |
102 | #include <linux/compat.h> | |
103 | ||
104 | #ifndef COMPAT_SHMLBA | |
105 | #define COMPAT_SHMLBA SHMLBA | |
106 | #endif | |
107 | ||
108 | struct compat_ipc_kludge { | |
109 | compat_uptr_t msgp; | |
110 | compat_long_t msgtyp; | |
111 | }; | |
112 | ||
113 | #ifdef CONFIG_ARCH_WANT_OLD_COMPAT_IPC | |
114 | COMPAT_SYSCALL_DEFINE6(ipc, u32, call, int, first, int, second, | |
115 | u32, third, compat_uptr_t, ptr, u32, fifth) | |
116 | { | |
117 | int version; | |
118 | u32 pad; | |
119 | ||
120 | version = call >> 16; /* hack for backward compatibility */ | |
121 | call &= 0xffff; | |
122 | ||
123 | switch (call) { | |
124 | case SEMOP: | |
125 | /* struct sembuf is the same on 32 and 64bit :)) */ | |
126 | return sys_semtimedop(first, compat_ptr(ptr), second, NULL); | |
127 | case SEMTIMEDOP: | |
128 | return compat_sys_semtimedop(first, compat_ptr(ptr), second, | |
129 | compat_ptr(fifth)); | |
130 | case SEMGET: | |
131 | return sys_semget(first, second, third); | |
132 | case SEMCTL: | |
133 | if (!ptr) | |
134 | return -EINVAL; | |
135 | if (get_user(pad, (u32 __user *) compat_ptr(ptr))) | |
136 | return -EFAULT; | |
137 | return compat_sys_semctl(first, second, third, pad); | |
138 | ||
139 | case MSGSND: | |
140 | return compat_sys_msgsnd(first, ptr, second, third); | |
141 | ||
142 | case MSGRCV: { | |
143 | void __user *uptr = compat_ptr(ptr); | |
144 | ||
145 | if (first < 0 || second < 0) | |
146 | return -EINVAL; | |
147 | ||
148 | if (!version) { | |
149 | struct compat_ipc_kludge ipck; | |
150 | if (!uptr) | |
151 | return -EINVAL; | |
152 | if (copy_from_user(&ipck, uptr, sizeof(ipck))) | |
153 | return -EFAULT; | |
154 | return compat_sys_msgrcv(first, ipck.msgp, second, | |
155 | ipck.msgtyp, third); | |
156 | } | |
157 | return compat_sys_msgrcv(first, ptr, second, fifth, third); | |
158 | } | |
159 | case MSGGET: | |
160 | return sys_msgget(first, second); | |
161 | case MSGCTL: | |
162 | return compat_sys_msgctl(first, second, compat_ptr(ptr)); | |
163 | ||
164 | case SHMAT: { | |
165 | int err; | |
166 | unsigned long raddr; | |
167 | ||
168 | if (version == 1) | |
169 | return -EINVAL; | |
170 | err = do_shmat(first, compat_ptr(ptr), second, &raddr, | |
171 | COMPAT_SHMLBA); | |
172 | if (err < 0) | |
173 | return err; | |
6aa211e8 | 174 | return put_user(raddr, (compat_ulong_t __user *)compat_ptr(third)); |
20bc2a3a AV |
175 | } |
176 | case SHMDT: | |
177 | return sys_shmdt(compat_ptr(ptr)); | |
178 | case SHMGET: | |
179 | return sys_shmget(first, (unsigned)second, third); | |
180 | case SHMCTL: | |
181 | return compat_sys_shmctl(first, second, compat_ptr(ptr)); | |
182 | } | |
183 | ||
184 | return -ENOSYS; | |
185 | } | |
186 | #endif | |
187 | #endif |