Commit e16d8df0 authored by Atsushi Nemoto's avatar Atsushi Nemoto Committed by Ralf Baechle
Browse files

[MIPS] Fix N32 SysV IPC routines 



Add wrappers for N32 msg{snd,rcv}.  compat_sys_msg{snd,rcv} can not not be
used as system call entries as is.  This fix is based on Kaz Kylheku's
patch.

Also change a type of last argument of sysn32_semctl to match its true
size.

Signed-off-by: default avatarAtsushi Nemoto <anemo@mba.ocn.ne.jp>
Signed-off-by: default avatarRalf Baechle <ralf@linux-mips.org>
parent 6b4cd275

arch/mips/kernel/linux32.c

+14 −2
Original line number Diff line number Diff line
@@ -440,14 +440,26 @@ sys32_ipc (u32 call, int first, int second, int third, u32 ptr, u32 fifth) 
}



#ifdef CONFIG_MIPS32_N32

asmlinkage long sysn32_semctl(int semid, int semnum, int cmd, union semun arg)

asmlinkage long sysn32_semctl(int semid, int semnum, int cmd, u32 arg)

{

	/* compat_sys_semctl expects a pointer to union semun */

	u32 __user *uptr = compat_alloc_user_space(sizeof(u32));

	if (put_user(ptr_to_compat(arg.__pad), uptr))

	if (put_user(arg, uptr))

		return -EFAULT;

	return compat_sys_semctl(semid, semnum, cmd, uptr);

}



asmlinkage long sysn32_msgsnd(int msqid, u32 msgp, unsigned msgsz, int msgflg)

{

	return compat_sys_msgsnd(msqid, msgsz, msgflg, compat_ptr(msgp));

}



asmlinkage long sysn32_msgrcv(int msqid, u32 msgp, size_t msgsz, int msgtyp,

			      int msgflg)

{

	return compat_sys_msgrcv(msqid, msgsz, msgtyp, msgflg, IPC_64,

				 compat_ptr(msgp));

}

#endif



struct sysctl_args32

arch/mips/kernel/scall64-n32.S

+2 −2
Original line number Diff line number Diff line
@@ -187,8 +187,8 @@ EXPORT(sysn32_call_table) 
	PTR	sysn32_semctl

	PTR	sys_shmdt			/* 6065 */

	PTR	sys_msgget

	PTR	compat_sys_msgsnd

	PTR	compat_sys_msgrcv

	PTR	sysn32_msgsnd

	PTR	sysn32_msgrcv

	PTR	compat_sys_msgctl

	PTR	compat_sys_fcntl		/* 6070 */

	PTR	sys_flock

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