mirror of
https://github.com/FEX-Emu/linux.git
synced 2024-12-15 05:11:32 +00:00
100 lines
2.3 KiB
C
100 lines
2.3 KiB
C
|
/*
|
||
|
* sys_ipc() is the old de-multiplexer for the SysV IPC calls.
|
||
|
*
|
||
|
* This is really horribly ugly, and new architectures should just wire up
|
||
|
* the individual syscalls instead.
|
||
|
*/
|
||
|
#include <linux/unistd.h>
|
||
|
|
||
|
#ifdef __ARCH_WANT_SYS_IPC
|
||
|
#include <linux/errno.h>
|
||
|
#include <linux/ipc.h>
|
||
|
#include <linux/shm.h>
|
||
|
#include <linux/syscalls.h>
|
||
|
#include <linux/uaccess.h>
|
||
|
|
||
|
SYSCALL_DEFINE6(ipc, unsigned int, call, int, first, int, second,
|
||
|
unsigned long, third, void __user *, ptr, long, fifth)
|
||
|
{
|
||
|
int version, ret;
|
||
|
|
||
|
version = call >> 16; /* hack for backward compatibility */
|
||
|
call &= 0xffff;
|
||
|
|
||
|
switch (call) {
|
||
|
case SEMOP:
|
||
|
return sys_semtimedop(first, (struct sembuf __user *)ptr,
|
||
|
second, NULL);
|
||
|
case SEMTIMEDOP:
|
||
|
return sys_semtimedop(first, (struct sembuf __user *)ptr,
|
||
|
second,
|
||
|
(const struct timespec __user *)fifth);
|
||
|
|
||
|
case SEMGET:
|
||
|
return sys_semget(first, second, third);
|
||
|
case SEMCTL: {
|
||
|
union semun fourth;
|
||
|
if (!ptr)
|
||
|
return -EINVAL;
|
||
|
if (get_user(fourth.__pad, (void __user * __user *) ptr))
|
||
|
return -EFAULT;
|
||
|
return sys_semctl(first, second, third, fourth);
|
||
|
}
|
||
|
|
||
|
case MSGSND:
|
||
|
return sys_msgsnd(first, (struct msgbuf __user *) ptr,
|
||
|
second, third);
|
||
|
case MSGRCV:
|
||
|
switch (version) {
|
||
|
case 0: {
|
||
|
struct ipc_kludge tmp;
|
||
|
if (!ptr)
|
||
|
return -EINVAL;
|
||
|
|
||
|
if (copy_from_user(&tmp,
|
||
|
(struct ipc_kludge __user *) ptr,
|
||
|
sizeof(tmp)))
|
||
|
return -EFAULT;
|
||
|
return sys_msgrcv(first, tmp.msgp, second,
|
||
|
tmp.msgtyp, third);
|
||
|
}
|
||
|
default:
|
||
|
return sys_msgrcv(first,
|
||
|
(struct msgbuf __user *) ptr,
|
||
|
second, fifth, third);
|
||
|
}
|
||
|
case MSGGET:
|
||
|
return sys_msgget((key_t) first, second);
|
||
|
case MSGCTL:
|
||
|
return sys_msgctl(first, second, (struct msqid_ds __user *)ptr);
|
||
|
|
||
|
case SHMAT:
|
||
|
switch (version) {
|
||
|
default: {
|
||
|
unsigned long raddr;
|
||
|
ret = do_shmat(first, (char __user *)ptr,
|
||
|
second, &raddr);
|
||
|
if (ret)
|
||
|
return ret;
|
||
|
return put_user(raddr, (unsigned long __user *) third);
|
||
|
}
|
||
|
case 1:
|
||
|
/*
|
||
|
* This was the entry point for kernel-originating calls
|
||
|
* from iBCS2 in 2.2 days.
|
||
|
*/
|
||
|
return -EINVAL;
|
||
|
}
|
||
|
case SHMDT:
|
||
|
return sys_shmdt((char __user *)ptr);
|
||
|
case SHMGET:
|
||
|
return sys_shmget(first, second, third);
|
||
|
case SHMCTL:
|
||
|
return sys_shmctl(first, second,
|
||
|
(struct shmid_ds __user *) ptr);
|
||
|
default:
|
||
|
return -ENOSYS;
|
||
|
}
|
||
|
}
|
||
|
#endif
|