ipc(2): move compat to native
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/ipc/syscall.c b/ipc/syscall.c
index 5242948..6670227 100644
--- a/ipc/syscall.c
+++ b/ipc/syscall.c
@@ -5,12 +5,12 @@
* the individual syscalls instead.
*/
#include <linux/unistd.h>
+#include <linux/syscalls.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, unsigned long, second,
@@ -97,3 +97,91 @@
}
}
#endif
+
+#ifdef CONFIG_COMPAT
+#include <linux/compat.h>
+
+#ifndef COMPAT_SHMLBA
+#define COMPAT_SHMLBA SHMLBA
+#endif
+
+struct compat_ipc_kludge {
+ compat_uptr_t msgp;
+ compat_long_t msgtyp;
+};
+
+#ifdef CONFIG_ARCH_WANT_OLD_COMPAT_IPC
+COMPAT_SYSCALL_DEFINE6(ipc, u32, call, int, first, int, second,
+ u32, third, compat_uptr_t, ptr, u32, fifth)
+{
+ int version;
+ u32 pad;
+
+ version = call >> 16; /* hack for backward compatibility */
+ call &= 0xffff;
+
+ switch (call) {
+ case SEMOP:
+ /* struct sembuf is the same on 32 and 64bit :)) */
+ return sys_semtimedop(first, compat_ptr(ptr), second, NULL);
+ case SEMTIMEDOP:
+ return compat_sys_semtimedop(first, compat_ptr(ptr), second,
+ compat_ptr(fifth));
+ case SEMGET:
+ return sys_semget(first, second, third);
+ case SEMCTL:
+ if (!ptr)
+ return -EINVAL;
+ if (get_user(pad, (u32 __user *) compat_ptr(ptr)))
+ return -EFAULT;
+ return compat_sys_semctl(first, second, third, pad);
+
+ case MSGSND:
+ return compat_sys_msgsnd(first, ptr, second, third);
+
+ case MSGRCV: {
+ void __user *uptr = compat_ptr(ptr);
+
+ if (first < 0 || second < 0)
+ return -EINVAL;
+
+ if (!version) {
+ struct compat_ipc_kludge ipck;
+ if (!uptr)
+ return -EINVAL;
+ if (copy_from_user(&ipck, uptr, sizeof(ipck)))
+ return -EFAULT;
+ return compat_sys_msgrcv(first, ipck.msgp, second,
+ ipck.msgtyp, third);
+ }
+ return compat_sys_msgrcv(first, ptr, second, fifth, third);
+ }
+ case MSGGET:
+ return sys_msgget(first, second);
+ case MSGCTL:
+ return compat_sys_msgctl(first, second, compat_ptr(ptr));
+
+ case SHMAT: {
+ int err;
+ unsigned long raddr;
+
+ if (version == 1)
+ return -EINVAL;
+ err = do_shmat(first, compat_ptr(ptr), second, &raddr,
+ COMPAT_SHMLBA);
+ if (err < 0)
+ return err;
+ return put_user(raddr, (compat_ulong_t *)compat_ptr(third));
+ }
+ case SHMDT:
+ return sys_shmdt(compat_ptr(ptr));
+ case SHMGET:
+ return sys_shmget(first, (unsigned)second, third);
+ case SHMCTL:
+ return compat_sys_shmctl(first, second, compat_ptr(ptr));
+ }
+
+ return -ENOSYS;
+}
+#endif
+#endif