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Source at commit 6c17a31f1fc515425221067cb3ece599c09dbc5d created 12 years 8 months ago. By Werner Almesberger, atusb, atben: moved from spi/ to ieee802154/; renamed atusb to spi_atusb | |
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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> |
8 | |
9 | #ifdef __ARCH_WANT_SYS_IPC |
10 | #include <linux/errno.h> |
11 | #include <linux/ipc.h> |
12 | #include <linux/shm.h> |
13 | #include <linux/syscalls.h> |
14 | #include <linux/uaccess.h> |
15 | |
16 | SYSCALL_DEFINE6(ipc, unsigned int, call, int, first, unsigned long, second, |
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: { |
36 | union semun fourth; |
37 | if (!ptr) |
38 | return -EINVAL; |
39 | if (get_user(fourth.__pad, (void __user * __user *) ptr)) |
40 | return -EFAULT; |
41 | return sys_semctl(first, second, third, fourth); |
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, |
76 | second, &raddr); |
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 |
100 |
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Tags:
od-2011-09-04
od-2011-09-18
v2.6.34-rc5
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v3.9