| 1 | |
| 2 | * sys_ipc() is the old de-multiplexer for the SysV IPC calls.
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| 3 | *
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| 4 | * This is really horribly ugly, and new architectures should just wire up
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| 5 | * the individual syscalls instead.
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| 6 |
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| 7 | #include <linux/unistd.h>
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| 8 |
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| 9 | #ifdef __ARCH_WANT_SYS_IPC
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| 10 | #include <linux/errno.h>
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| 11 | #include <linux/ipc.h>
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| 12 | #include <linux/shm.h>
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| 13 | #include <linux/syscalls.h>
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| 14 | #include <linux/uaccess.h>
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| 15 |
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| 16 | SYSCALL_DEFINE6(ipc, unsigned int, call, int, first, unsigned long, second,
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| 17 | unsigned long, third, void __user *, ptr, long, fifth)
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| 18 | {
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| 19 | int version, ret;
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| 20 |
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| 21 | version = call >> 16;
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| 22 | call &= 0xffff;
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| 23 |
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| 24 | switch (call) {
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| 25 | case SEMOP:
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| 26 | return sys_semtimedop(first, (struct sembuf __user *)ptr,
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| 27 | second, NULL);
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| 28 | case SEMTIMEDOP:
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| 29 | return sys_semtimedop(first, (struct sembuf __user *)ptr,
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| 30 | second,
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| 31 | (const struct timespec __user *)fifth);
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| 32 |
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| 33 | case SEMGET:
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| 34 | return sys_semget(first, second, third);
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| 35 | case SEMCTL: {
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| 36 | unsigned long arg;
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| 37 | if (!ptr)
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| 38 | return -EINVAL;
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| 39 | if (get_user(arg, (unsigned long __user *) ptr))
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| 40 | return -EFAULT;
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| 41 | return sys_semctl(first, second, third, arg);
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| 42 | }
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| 43 |
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| 44 | case MSGSND:
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| 45 | return sys_msgsnd(first, (struct msgbuf __user *) ptr,
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| 46 | second, third);
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| 47 | case MSGRCV:
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| 48 | switch (version) {
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| 49 | case 0: {
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| 50 | struct ipc_kludge tmp;
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| 51 | if (!ptr)
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| 52 | return -EINVAL;
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| 53 |
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| 54 | if (copy_from_user(&tmp,
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| 55 | (struct ipc_kludge __user *) ptr,
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| 56 | sizeof(tmp)))
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| 57 | return -EFAULT;
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| 58 | return sys_msgrcv(first, tmp.msgp, second,
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| 59 | tmp.msgtyp, third);
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| 60 | }
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| 61 | default:
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| 62 | return sys_msgrcv(first,
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| 63 | (struct msgbuf __user *) ptr,
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| 64 | second, fifth, third);
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| 65 | }
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| 66 | case MSGGET:
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| 67 | return sys_msgget((key_t) first, second);
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| 68 | case MSGCTL:
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| 69 | return sys_msgctl(first, second, (struct msqid_ds __user *)ptr);
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| 70 |
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| 71 | case SHMAT:
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| 72 | switch (version) {
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| 73 | default: {
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| 74 | unsigned long raddr;
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| 75 | ret = do_shmat(first, (char __user *)ptr,
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| 76 | second, &raddr, SHMLBA);
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| 77 | if (ret)
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| 78 | return ret;
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| 79 | return put_user(raddr, (unsigned long __user *) third);
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| 80 | }
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| 81 | case 1:
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| 82 | |
| 83 | * This was the entry point for kernel-originating calls
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| 84 | * from iBCS2 in 2.2 days.
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| 85 |
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| 86 | return -EINVAL;
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| 87 | }
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| 88 | case SHMDT:
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| 89 | return sys_shmdt((char __user *)ptr);
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| 90 | case SHMGET:
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| 91 | return sys_shmget(first, second, third);
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| 92 | case SHMCTL:
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| 93 | return sys_shmctl(first, second,
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| 94 | (struct shmid_ds __user *) ptr);
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| 95 | default:
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| 96 | return -ENOSYS;
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| 97 | }
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| 98 | }
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| 99 | #endif
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