[deliverable/linux.git] / arch / powerpc / kernel / syscalls.c

/*
 *  Implementation of various system calls for Linux/PowerPC
 *
 *    Copyright (C) 1995-1996 Gary Thomas (gdt@linuxppc.org)
 *
 * Derived from "arch/i386/kernel/sys_i386.c"
 * Adapted from the i386 version by Gary Thomas
 * Modified by Cort Dougan (cort@cs.nmt.edu)
 * and Paul Mackerras (paulus@cs.anu.edu.au).
 *
 * This file contains various random system calls that
 * have a non-standard calling sequence on the Linux/PPC
 * platform.
 *
 *  This program is free software; you can redistribute it and/or
 *  modify it under the terms of the GNU General Public License
 *  as published by the Free Software Foundation; either version
 *  2 of the License, or (at your option) any later version.
 *
 */

#include <linux/errno.h>
#include <linux/sched.h>
#include <linux/syscalls.h>
#include <linux/mm.h>
#include <linux/smp.h>
#include <linux/smp_lock.h>
#include <linux/sem.h>
#include <linux/msg.h>
#include <linux/shm.h>
#include <linux/stat.h>
#include <linux/mman.h>
#include <linux/sys.h>
#include <linux/ipc.h>
#include <linux/utsname.h>
#include <linux/file.h>
#include <linux/init.h>
#include <linux/personality.h>

#include <asm/uaccess.h>
#include <asm/ipc.h>
#include <asm/semaphore.h>
#include <asm/time.h>
#include <asm/unistd.h>

extern unsigned long wall_jiffies;


/*
 * sys_ipc() is the de-multiplexer for the SysV IPC calls..
 *
 * This is really horribly ugly.
 */
int sys_ipc(uint call, int first, unsigned long second, long third,
	    void __user *ptr, long fifth)
{
	int version, ret;

	version = call >> 16; /* hack for backward compatibility */
	call &= 0xffff;

	ret = -ENOSYS;
	switch (call) {
	case SEMOP:
		ret = sys_semtimedop(first, (struct sembuf __user *)ptr,
				      (unsigned)second, NULL);
		break;
	case SEMTIMEDOP:
		ret = sys_semtimedop(first, (struct sembuf __user *)ptr,
				      (unsigned)second,
				      (const struct timespec __user *) fifth);
		break;
	case SEMGET:
		ret = sys_semget (first, (int)second, third);
		break;
	case SEMCTL: {
		union semun fourth;

		ret = -EINVAL;
		if (!ptr)
			break;
		if ((ret = get_user(fourth.__pad, (void __user * __user *)ptr)))
			break;
		ret = sys_semctl(first, (int)second, third, fourth);
		break;
	}
	case MSGSND:
		ret = sys_msgsnd(first, (struct msgbuf __user *)ptr,
				 (size_t)second, third);
		break;
	case MSGRCV:
		switch (version) {
		case 0: {
			struct ipc_kludge tmp;

			ret = -EINVAL;
			if (!ptr)
				break;
			if ((ret = copy_from_user(&tmp,
						(struct ipc_kludge __user *) ptr,
						sizeof (tmp)) ? -EFAULT : 0))
				break;
			ret = sys_msgrcv(first, tmp.msgp, (size_t) second,
					  tmp.msgtyp, third);
			break;
		}
		default:
			ret = sys_msgrcv (first, (struct msgbuf __user *) ptr,
					  (size_t)second, fifth, third);
			break;
		}
		break;
	case MSGGET:
		ret = sys_msgget((key_t)first, (int)second);
		break;
	case MSGCTL:
		ret = sys_msgctl(first, (int)second,
				  (struct msqid_ds __user *)ptr);
		break;
	case SHMAT: {
		ulong raddr;
		ret = do_shmat(first, (char __user *)ptr, (int)second, &raddr);
		if (ret)
			break;
		ret = put_user(raddr, (ulong __user *) third);
		break;
	}
	case SHMDT:
		ret = sys_shmdt((char __user *)ptr);
		break;
	case SHMGET:
		ret = sys_shmget(first, (size_t)second, third);
		break;
	case SHMCTL:
		ret = sys_shmctl(first, (int)second,
				 (struct shmid_ds __user *)ptr);
		break;
	}

	return ret;
}

/*
 * sys_pipe() is the normal C calling standard for creating
 * a pipe. It's not the way unix traditionally does this, though.
 */
int sys_pipe(int __user *fildes)
{
	int fd[2];
	int error;

	error = do_pipe(fd);
	if (!error) {
		if (copy_to_user(fildes, fd, 2*sizeof(int)))
			error = -EFAULT;
	}
	return error;
}

static inline unsigned long do_mmap2(unsigned long addr, size_t len,
			unsigned long prot, unsigned long flags,
			unsigned long fd, unsigned long off, int shift)
{
	struct file * file = NULL;
	unsigned long ret = -EINVAL;

	if (shift) {
		if (off & ((1 << shift) - 1))
			goto out;
		off >>= shift;
	}
		
	ret = -EBADF;
	if (!(flags & MAP_ANONYMOUS)) {
		if (!(file = fget(fd)))
			goto out;
	}

	flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE);

	down_write(&current->mm->mmap_sem);
	ret = do_mmap_pgoff(file, addr, len, prot, flags, off);
	up_write(&current->mm->mmap_sem);
	if (file)
		fput(file);
out:
	return ret;
}

unsigned long sys_mmap2(unsigned long addr, size_t len,
			unsigned long prot, unsigned long flags,
			unsigned long fd, unsigned long pgoff)
{
	return do_mmap2(addr, len, prot, flags, fd, pgoff, PAGE_SHIFT-12);
}

unsigned long sys_mmap(unsigned long addr, size_t len,
		       unsigned long prot, unsigned long flags,
		       unsigned long fd, off_t offset)
{
	return do_mmap2(addr, len, prot, flags, fd, offset, PAGE_SHIFT);
}

#ifdef CONFIG_PPC32
/*
 * Due to some executables calling the wrong select we sometimes
 * get wrong args.  This determines how the args are being passed
 * (a single ptr to them all args passed) then calls
 * sys_select() with the appropriate args. -- Cort
 */
int
ppc_select(int n, fd_set __user *inp, fd_set __user *outp, fd_set __user *exp, struct timeval __user *tvp)
{
	if ( (unsigned long)n >= 4096 )
	{
		unsigned long __user *buffer = (unsigned long __user *)n;
		if (!access_ok(VERIFY_READ, buffer, 5*sizeof(unsigned long))
		    || __get_user(n, buffer)
		    || __get_user(inp, ((fd_set __user * __user *)(buffer+1)))
		    || __get_user(outp, ((fd_set  __user * __user *)(buffer+2)))
		    || __get_user(exp, ((fd_set  __user * __user *)(buffer+3)))
		    || __get_user(tvp, ((struct timeval  __user * __user *)(buffer+4))))
			return -EFAULT;
	}
	return sys_select(n, inp, outp, exp, tvp);
}
#endif

#ifdef CONFIG_PPC64
long ppc64_personality(unsigned long personality)
{
	long ret;

	if (personality(current->personality) == PER_LINUX32
	    && personality == PER_LINUX)
		personality = PER_LINUX32;
	ret = sys_personality(personality);
	if (ret == PER_LINUX32)
		ret = PER_LINUX;
	return ret;
}
#endif

#ifdef CONFIG_PPC64
#define OVERRIDE_MACHINE    (personality(current->personality) == PER_LINUX32)
#else
#define OVERRIDE_MACHINE    0
#endif

static inline int override_machine(char *mach)
{
	if (OVERRIDE_MACHINE) {
		/* change ppc64 to ppc */
		if (__put_user(0, mach+3) || __put_user(0, mach+4))
			return -EFAULT;
	}
	return 0;
}

long ppc_newuname(struct new_utsname __user * name)
{
	int err = 0;

	down_read(&uts_sem);
	if (copy_to_user(name, &system_utsname, sizeof(*name)))
		err = -EFAULT;
	up_read(&uts_sem);
	if (!err)
		err = override_machine(name->machine);
	return err;
}

int sys_uname(struct old_utsname __user *name)
{
	int err = 0;
	
	down_read(&uts_sem);
	if (copy_to_user(name, &system_utsname, sizeof(*name)))
		err = -EFAULT;
	up_read(&uts_sem);
	if (!err)
		err = override_machine(name->machine);
	return err;
}

int sys_olduname(struct oldold_utsname __user *name)
{
	int error;

	if (!access_ok(VERIFY_WRITE, name, sizeof(struct oldold_utsname)))
		return -EFAULT;
  
	down_read(&uts_sem);
	error = __copy_to_user(&name->sysname, &system_utsname.sysname,
			       __OLD_UTS_LEN);
	error |= __put_user(0, name->sysname + __OLD_UTS_LEN);
	error |= __copy_to_user(&name->nodename, &system_utsname.nodename,
				__OLD_UTS_LEN);
	error |= __put_user(0, name->nodename + __OLD_UTS_LEN);
	error |= __copy_to_user(&name->release, &system_utsname.release,
				__OLD_UTS_LEN);
	error |= __put_user(0, name->release + __OLD_UTS_LEN);
	error |= __copy_to_user(&name->version, &system_utsname.version,
				__OLD_UTS_LEN);
	error |= __put_user(0, name->version + __OLD_UTS_LEN);
	error |= __copy_to_user(&name->machine, &system_utsname.machine,
				__OLD_UTS_LEN);
	error |= override_machine(name->machine);
	up_read(&uts_sem);

	return error? -EFAULT: 0;
}

#ifdef CONFIG_PPC64
time_t sys64_time(time_t __user * tloc)
{
	time_t secs;
	time_t usecs;

	long tb_delta = tb_ticks_since(tb_last_stamp);
	tb_delta += (jiffies - wall_jiffies) * tb_ticks_per_jiffy;

	secs  = xtime.tv_sec;  
	usecs = (xtime.tv_nsec/1000) + tb_delta / tb_ticks_per_usec;
	while (usecs >= USEC_PER_SEC) {
		++secs;
		usecs -= USEC_PER_SEC;
	}

	if (tloc) {
		if (put_user(secs,tloc))
			secs = -EFAULT;
	}

	return secs;
}
#endif

long ppc_fadvise64_64(int fd, int advice, u32 offset_high, u32 offset_low,
		      u32 len_high, u32 len_low)
{
	return sys_fadvise64(fd, (u64)offset_high << 32 | offset_low,
			     (u64)len_high << 32 | len_low, advice);
}

void do_show_syscall(unsigned long r3, unsigned long r4, unsigned long r5,
		     unsigned long r6, unsigned long r7, unsigned long r8,
		     struct pt_regs *regs)
{
	printk("syscall %ld(%lx, %lx, %lx, %lx, %lx, %lx) regs=%p current=%p"
	       " cpu=%d\n", regs->gpr[0], r3, r4, r5, r6, r7, r8, regs,
	       current, smp_processor_id());
}

void do_show_syscall_exit(unsigned long r3)
{
	printk(" -> %lx, current=%p cpu=%d\n", r3, current, smp_processor_id());
}
Commit	Line	Data
1da177e4	1	/*
30286ef6	2	* Implementation of various system calls for Linux/PowerPC
1da177e4	3	*
1da177e4 LT	4	* Copyright (C) 1995-1996 Gary Thomas (gdt@linuxppc.org)
	5	*
	6	* Derived from "arch/i386/kernel/sys_i386.c"
	7	* Adapted from the i386 version by Gary Thomas
	8	* Modified by Cort Dougan (cort@cs.nmt.edu)
	9	* and Paul Mackerras (paulus@cs.anu.edu.au).
	10	*
	11	* This file contains various random system calls that
	12	* have a non-standard calling sequence on the Linux/PPC
	13	* platform.
	14	*
	15	* This program is free software; you can redistribute it and/or
	16	* modify it under the terms of the GNU General Public License
	17	* as published by the Free Software Foundation; either version
	18	* 2 of the License, or (at your option) any later version.
	19	*
	20	*/
	21
	22	#include <linux/errno.h>
	23	#include <linux/sched.h>
	24	#include <linux/syscalls.h>
	25	#include <linux/mm.h>
	26	#include <linux/smp.h>
	27	#include <linux/smp_lock.h>
	28	#include <linux/sem.h>
	29	#include <linux/msg.h>
	30	#include <linux/shm.h>
	31	#include <linux/stat.h>
	32	#include <linux/mman.h>
	33	#include <linux/sys.h>
	34	#include <linux/ipc.h>
	35	#include <linux/utsname.h>
	36	#include <linux/file.h>
	37	#include <linux/init.h>
	38	#include <linux/personality.h>
	39
	40	#include <asm/uaccess.h>
	41	#include <asm/ipc.h>
	42	#include <asm/semaphore.h>
	43	#include <asm/time.h>
	44	#include <asm/unistd.h>
	45
	46	extern unsigned long wall_jiffies;
	47
1da177e4 LT	48
	49	/*
	50	* sys_ipc() is the de-multiplexer for the SysV IPC calls..
	51	*
	52	* This is really horribly ugly.
	53	*/
30286ef6 PM	54	int sys_ipc(uint call, int first, unsigned long second, long third,
30286ef6 PM	55	void __user *ptr, long fifth)
1da177e4 LT	56	{
	57	int version, ret;
	58
	59	version = call >> 16; /* hack for backward compatibility */
	60	call &= 0xffff;
	61
	62	ret = -ENOSYS;
	63	switch (call) {
	64	case SEMOP:
	65	ret = sys_semtimedop(first, (struct sembuf __user *)ptr,
	66	(unsigned)second, NULL);
	67	break;
	68	case SEMTIMEDOP:
	69	ret = sys_semtimedop(first, (struct sembuf __user *)ptr,
	70	(unsigned)second,
	71	(const struct timespec __user *) fifth);
	72	break;
	73	case SEMGET:
	74	ret = sys_semget (first, (int)second, third);
	75	break;
	76	case SEMCTL: {
	77	union semun fourth;
	78
	79	ret = -EINVAL;
	80	if (!ptr)
	81	break;
	82	if ((ret = get_user(fourth.__pad, (void __user * __user *)ptr)))
	83	break;
	84	ret = sys_semctl(first, (int)second, third, fourth);
	85	break;
	86	}
	87	case MSGSND:
	88	ret = sys_msgsnd(first, (struct msgbuf __user *)ptr,
30286ef6	89	(size_t)second, third);
1da177e4 LT	90	break;
	91	case MSGRCV:
	92	switch (version) {
	93	case 0: {
	94	struct ipc_kludge tmp;
	95
	96	ret = -EINVAL;
	97	if (!ptr)
	98	break;
	99	if ((ret = copy_from_user(&tmp,
	100	(struct ipc_kludge __user *) ptr,
	101	sizeof (tmp)) ? -EFAULT : 0))
	102	break;
	103	ret = sys_msgrcv(first, tmp.msgp, (size_t) second,
	104	tmp.msgtyp, third);
	105	break;
	106	}
	107	default:
	108	ret = sys_msgrcv (first, (struct msgbuf __user *) ptr,
	109	(size_t)second, fifth, third);
	110	break;
	111	}
	112	break;
	113	case MSGGET:
30286ef6	114	ret = sys_msgget((key_t)first, (int)second);
1da177e4 LT	115	break;
	116	case MSGCTL:
	117	ret = sys_msgctl(first, (int)second,
	118	(struct msqid_ds __user *)ptr);
	119	break;
30286ef6 PM	120	case SHMAT: {
	121	ulong raddr;
	122	ret = do_shmat(first, (char __user *)ptr, (int)second, &raddr);
	123	if (ret)
1da177e4	124	break;
30286ef6	125	ret = put_user(raddr, (ulong __user *) third);
1da177e4	126	break;
30286ef6 PM	127	}
	128	case SHMDT:
	129	ret = sys_shmdt((char __user *)ptr);
1da177e4 LT	130	break;
1da177e4 LT	131	case SHMGET:
30286ef6	132	ret = sys_shmget(first, (size_t)second, third);
1da177e4 LT	133	break;
	134	case SHMCTL:
	135	ret = sys_shmctl(first, (int)second,
30286ef6	136	(struct shmid_ds __user *)ptr);
1da177e4 LT	137	break;
	138	}
	139
	140	return ret;
	141	}
	142
	143	/*
	144	* sys_pipe() is the normal C calling standard for creating
	145	* a pipe. It's not the way unix traditionally does this, though.
	146	*/
30286ef6	147	int sys_pipe(int __user *fildes)
1da177e4 LT	148	{
	149	int fd[2];
	150	int error;
30286ef6	151
1da177e4 LT	152	error = do_pipe(fd);
	153	if (!error) {
	154	if (copy_to_user(fildes, fd, 2*sizeof(int)))
	155	error = -EFAULT;
	156	}
1da177e4 LT	157	return error;
	158	}
	159
30286ef6 PM	160	static inline unsigned long do_mmap2(unsigned long addr, size_t len,
	161	unsigned long prot, unsigned long flags,
	162	unsigned long fd, unsigned long off, int shift)
1da177e4 LT	163	{
1da177e4 LT	164	struct file * file = NULL;
05d84681	165	unsigned long ret = -EINVAL;
1da177e4	166
30286ef6 PM	167	if (shift) {
	168	if (off & ((1 << shift) - 1))
	169	goto out;
	170	off >>= shift;
	171	}
	172
	173	ret = -EBADF;
1da177e4 LT	174	if (!(flags & MAP_ANONYMOUS)) {
	175	if (!(file = fget(fd)))
	176	goto out;
	177	}
	178
	179	flags &= ~(MAP_EXECUTABLE \| MAP_DENYWRITE);
30286ef6	180
1da177e4	181	down_write(&current->mm->mmap_sem);
30286ef6	182	ret = do_mmap_pgoff(file, addr, len, prot, flags, off);
1da177e4 LT	183	up_write(&current->mm->mmap_sem);
	184	if (file)
	185	fput(file);
1da177e4 LT	186	out:
	187	return ret;
	188	}
	189
30286ef6 PM	190	unsigned long sys_mmap2(unsigned long addr, size_t len,
	191	unsigned long prot, unsigned long flags,
	192	unsigned long fd, unsigned long pgoff)
	193	{
	194	return do_mmap2(addr, len, prot, flags, fd, pgoff, PAGE_SHIFT-12);
	195	}
	196
	197	unsigned long sys_mmap(unsigned long addr, size_t len,
	198	unsigned long prot, unsigned long flags,
	199	unsigned long fd, off_t offset)
	200	{
	201	return do_mmap2(addr, len, prot, flags, fd, offset, PAGE_SHIFT);
	202	}
	203
	204	#ifdef CONFIG_PPC32
	205	/*
	206	* Due to some executables calling the wrong select we sometimes
	207	* get wrong args. This determines how the args are being passed
	208	* (a single ptr to them all args passed) then calls
	209	* sys_select() with the appropriate args. -- Cort
	210	*/
	211	int
	212	ppc_select(int n, fd_set __user inp, fd_set __user outp, fd_set __user exp, struct timeval __user tvp)
	213	{
	214	if ( (unsigned long)n >= 4096 )
	215	{
	216	unsigned long __user buffer = (unsigned long __user )n;
	217	if (!access_ok(VERIFY_READ, buffer, 5*sizeof(unsigned long))
	218	\|\| __get_user(n, buffer)
	219	\|\| __get_user(inp, ((fd_set __user * __user *)(buffer+1)))
	220	\|\| __get_user(outp, ((fd_set __user * __user *)(buffer+2)))
	221	\|\| __get_user(exp, ((fd_set __user * __user *)(buffer+3)))
	222	\|\| __get_user(tvp, ((struct timeval __user * __user *)(buffer+4))))
	223	return -EFAULT;
	224	}
	225	return sys_select(n, inp, outp, exp, tvp);
	226	}
	227	#endif
	228
	229	#ifdef CONFIG_PPC64
ce10d979	230	long ppc64_personality(unsigned long personality)
1da177e4	231	{
ce10d979 PM	232	long ret;
	233
	234	if (personality(current->personality) == PER_LINUX32
	235	&& personality == PER_LINUX)
	236	personality = PER_LINUX32;
	237	ret = sys_personality(personality);
	238	if (ret == PER_LINUX32)
	239	ret = PER_LINUX;
	240	return ret;
1da177e4	241	}
30286ef6 PM	242	#endif
	243
	244	#ifdef CONFIG_PPC64
	245	#define OVERRIDE_MACHINE (personality(current->personality) == PER_LINUX32)
	246	#else
	247	#define OVERRIDE_MACHINE 0
	248	#endif
1da177e4	249
30286ef6 PM	250	static inline int override_machine(char *mach)
	251	{
	252	if (OVERRIDE_MACHINE) {
	253	/* change ppc64 to ppc */
	254	if (__put_user(0, mach+3) \|\| __put_user(0, mach+4))
	255	return -EFAULT;
	256	}
	257	return 0;
	258	}
	259
	260	long ppc_newuname(struct new_utsname __user * name)
1da177e4	261	{
ce10d979 PM	262	int err = 0;
ce10d979 PM	263
1da177e4	264	down_read(&uts_sem);
ce10d979 PM	265	if (copy_to_user(name, &system_utsname, sizeof(*name)))
ce10d979 PM	266	err = -EFAULT;
1da177e4	267	up_read(&uts_sem);
30286ef6 PM	268	if (!err)
30286ef6 PM	269	err = override_machine(name->machine);
1da177e4 LT	270	return err;
	271	}
	272
30286ef6 PM	273	int sys_uname(struct old_utsname __user *name)
	274	{
	275	int err = 0;
	276
	277	down_read(&uts_sem);
	278	if (copy_to_user(name, &system_utsname, sizeof(*name)))
	279	err = -EFAULT;
	280	up_read(&uts_sem);
	281	if (!err)
	282	err = override_machine(name->machine);
	283	return err;
	284	}
	285
	286	int sys_olduname(struct oldold_utsname __user *name)
	287	{
	288	int error;
	289
	290	if (!access_ok(VERIFY_WRITE, name, sizeof(struct oldold_utsname)))
	291	return -EFAULT;
	292
	293	down_read(&uts_sem);
	294	error = __copy_to_user(&name->sysname, &system_utsname.sysname,
	295	__OLD_UTS_LEN);
	296	error \|= __put_user(0, name->sysname + __OLD_UTS_LEN);
	297	error \|= __copy_to_user(&name->nodename, &system_utsname.nodename,
	298	__OLD_UTS_LEN);
	299	error \|= __put_user(0, name->nodename + __OLD_UTS_LEN);
	300	error \|= __copy_to_user(&name->release, &system_utsname.release,
	301	__OLD_UTS_LEN);
	302	error \|= __put_user(0, name->release + __OLD_UTS_LEN);
	303	error \|= __copy_to_user(&name->version, &system_utsname.version,
	304	__OLD_UTS_LEN);
	305	error \|= __put_user(0, name->version + __OLD_UTS_LEN);
	306	error \|= __copy_to_user(&name->machine, &system_utsname.machine,
	307	__OLD_UTS_LEN);
	308	error \|= override_machine(name->machine);
	309	up_read(&uts_sem);
	310
	311	return error? -EFAULT: 0;
	312	}
	313
	314	#ifdef CONFIG_PPC64
	315	time_t sys64_time(time_t __user * tloc)
1da177e4 LT	316	{
	317	time_t secs;
	318	time_t usecs;
	319
	320	long tb_delta = tb_ticks_since(tb_last_stamp);
	321	tb_delta += (jiffies - wall_jiffies) * tb_ticks_per_jiffy;
	322
	323	secs = xtime.tv_sec;
	324	usecs = (xtime.tv_nsec/1000) + tb_delta / tb_ticks_per_usec;
	325	while (usecs >= USEC_PER_SEC) {
	326	++secs;
	327	usecs -= USEC_PER_SEC;
	328	}
	329
	330	if (tloc) {
	331	if (put_user(secs,tloc))
	332	secs = -EFAULT;
	333	}
	334
	335	return secs;
	336	}
30286ef6	337	#endif
1da177e4	338
77f543cb PM	339	long ppc_fadvise64_64(int fd, int advice, u32 offset_high, u32 offset_low,
	340	u32 len_high, u32 len_low)
	341	{
	342	return sys_fadvise64(fd, (u64)offset_high << 32 \| offset_low,
	343	(u64)len_high << 32 \| len_low, advice);
	344	}
	345
1da177e4 LT	346	void do_show_syscall(unsigned long r3, unsigned long r4, unsigned long r5,
	347	unsigned long r6, unsigned long r7, unsigned long r8,
	348	struct pt_regs *regs)
	349	{
	350	printk("syscall %ld(%lx, %lx, %lx, %lx, %lx, %lx) regs=%p current=%p"
	351	" cpu=%d\n", regs->gpr[0], r3, r4, r5, r6, r7, r8, regs,
	352	current, smp_processor_id());
	353	}
	354
	355	void do_show_syscall_exit(unsigned long r3)
	356	{
	357	printk(" -> %lx, current=%p cpu=%d\n", r3, current, smp_processor_id());
	358	}