[deliverable/linux.git] / arch / mips / kernel / linux32.c

/*
 * Conversion between 32-bit and 64-bit native system calls.
 *
 * Copyright (C) 2000 Silicon Graphics, Inc.
 * Written by Ulf Carlsson (ulfc@engr.sgi.com)
 * sys32_execve from ia64/ia32 code, Feb 2000, Kanoj Sarcar (kanoj@sgi.com)
 */
#include <linux/compiler.h>
#include <linux/mm.h>
#include <linux/errno.h>
#include <linux/file.h>
#include <linux/smp_lock.h>
#include <linux/highuid.h>
#include <linux/resource.h>
#include <linux/highmem.h>
#include <linux/time.h>
#include <linux/times.h>
#include <linux/poll.h>
#include <linux/slab.h>
#include <linux/skbuff.h>
#include <linux/filter.h>
#include <linux/shm.h>
#include <linux/sem.h>
#include <linux/msg.h>
#include <linux/icmpv6.h>
#include <linux/syscalls.h>
#include <linux/sysctl.h>
#include <linux/utime.h>
#include <linux/utsname.h>
#include <linux/personality.h>
#include <linux/dnotify.h>
#include <linux/module.h>
#include <linux/binfmts.h>
#include <linux/security.h>
#include <linux/compat.h>
#include <linux/vfs.h>
#include <linux/ipc.h>

#include <net/sock.h>
#include <net/scm.h>

#include <asm/compat-signal.h>
#include <asm/sim.h>
#include <asm/uaccess.h>
#include <asm/mmu_context.h>
#include <asm/mman.h>

/* Use this to get at 32-bit user passed pointers. */
/* A() macro should be used for places where you e.g.
   have some internal variable u32 and just want to get
   rid of a compiler warning. AA() has to be used in
   places where you want to convert a function argument
   to 32bit pointer or when you e.g. access pt_regs
   structure and want to consider 32bit registers only.
 */
#define A(__x) ((unsigned long)(__x))
#define AA(__x) ((unsigned long)((int)__x))

#ifdef __MIPSEB__
#define merge_64(r1, r2) ((((r1) & 0xffffffffUL) << 32) + ((r2) & 0xffffffffUL))
#endif
#ifdef __MIPSEL__
#define merge_64(r1, r2) ((((r2) & 0xffffffffUL) << 32) + ((r1) & 0xffffffffUL))
#endif

asmlinkage unsigned long
sys32_mmap2(unsigned long addr, unsigned long len, unsigned long prot,
         unsigned long flags, unsigned long fd, unsigned long pgoff)
{
	struct file * file = NULL;
	unsigned long error;

	error = -EINVAL;
	if (pgoff & (~PAGE_MASK >> 12))
		goto out;
	pgoff >>= PAGE_SHIFT-12;

	if (!(flags & MAP_ANONYMOUS)) {
		error = -EBADF;
		file = fget(fd);
		if (!file)
			goto out;
	}
	flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE);

	down_write(&current->mm->mmap_sem);
	error = do_mmap_pgoff(file, addr, len, prot, flags, pgoff);
	up_write(&current->mm->mmap_sem);
	if (file)
		fput(file);

out:
	return error;
}

/*
 * sys_execve() executes a new program.
 */
asmlinkage int sys32_execve(nabi_no_regargs struct pt_regs regs)
{
	int error;
	char * filename;

	filename = getname(compat_ptr(regs.regs[4]));
	error = PTR_ERR(filename);
	if (IS_ERR(filename))
		goto out;
	error = compat_do_execve(filename, compat_ptr(regs.regs[5]),
				 compat_ptr(regs.regs[6]), &regs);
	putname(filename);

out:
	return error;
}

#define RLIM_INFINITY32	0x7fffffff
#define RESOURCE32(x) ((x > RLIM_INFINITY32) ? RLIM_INFINITY32 : x)

struct rlimit32 {
	int	rlim_cur;
	int	rlim_max;
};

asmlinkage long sys32_truncate64(const char __user * path,
	unsigned long __dummy, int a2, int a3)
{
	return sys_truncate(path, merge_64(a2, a3));
}

asmlinkage long sys32_ftruncate64(unsigned int fd, unsigned long __dummy,
	int a2, int a3)
{
	return sys_ftruncate(fd, merge_64(a2, a3));
}

asmlinkage int sys32_llseek(unsigned int fd, unsigned int offset_high,
			    unsigned int offset_low, loff_t __user * result,
			    unsigned int origin)
{
	return sys_llseek(fd, offset_high, offset_low, result, origin);
}

/* From the Single Unix Spec: pread & pwrite act like lseek to pos + op +
   lseek back to original location.  They fail just like lseek does on
   non-seekable files.  */

asmlinkage ssize_t sys32_pread(unsigned int fd, char __user * buf,
			       size_t count, u32 unused, u64 a4, u64 a5)
{
	return sys_pread64(fd, buf, count, merge_64(a4, a5));
}

asmlinkage ssize_t sys32_pwrite(unsigned int fd, const char __user * buf,
			        size_t count, u32 unused, u64 a4, u64 a5)
{
	return sys_pwrite64(fd, buf, count, merge_64(a4, a5));
}

asmlinkage int sys32_sched_rr_get_interval(compat_pid_t pid,
	struct compat_timespec __user *interval)
{
	struct timespec t;
	int ret;
	mm_segment_t old_fs = get_fs();

	set_fs(KERNEL_DS);
	ret = sys_sched_rr_get_interval(pid, (struct timespec __user *)&t);
	set_fs(old_fs);
	if (put_user (t.tv_sec, &interval->tv_sec) ||
	    __put_user(t.tv_nsec, &interval->tv_nsec))
		return -EFAULT;
	return ret;
}

#ifdef CONFIG_SYSVIPC

asmlinkage long
sys32_ipc(u32 call, int first, int second, int third, u32 ptr, u32 fifth)
{
	int version, err;

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

	switch (call) {
	case SEMOP:
		/* struct sembuf is the same on 32 and 64bit :)) */
		err = sys_semtimedop(first, compat_ptr(ptr), second, NULL);
		break;
	case SEMTIMEDOP:
		err = compat_sys_semtimedop(first, compat_ptr(ptr), second,
					    compat_ptr(fifth));
		break;
	case SEMGET:
		err = sys_semget(first, second, third);
		break;
	case SEMCTL:
		err = compat_sys_semctl(first, second, third, compat_ptr(ptr));
		break;
	case MSGSND:
		err = compat_sys_msgsnd(first, second, third, compat_ptr(ptr));
		break;
	case MSGRCV:
		err = compat_sys_msgrcv(first, second, fifth, third,
					version, compat_ptr(ptr));
		break;
	case MSGGET:
		err = sys_msgget((key_t) first, second);
		break;
	case MSGCTL:
		err = compat_sys_msgctl(first, second, compat_ptr(ptr));
		break;
	case SHMAT:
		err = compat_sys_shmat(first, second, third, version,
				       compat_ptr(ptr));
		break;
	case SHMDT:
		err = sys_shmdt(compat_ptr(ptr));
		break;
	case SHMGET:
		err = sys_shmget(first, (unsigned)second, third);
		break;
	case SHMCTL:
		err = compat_sys_shmctl(first, second, compat_ptr(ptr));
		break;
	default:
		err = -EINVAL;
		break;
	}

	return err;
}

#else

asmlinkage long
sys32_ipc(u32 call, int first, int second, int third, u32 ptr, u32 fifth)
{
	return -ENOSYS;
}

#endif /* CONFIG_SYSVIPC */

#ifdef CONFIG_MIPS32_N32
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(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
{
	compat_caddr_t name;
	int nlen;
	compat_caddr_t oldval;
	compat_caddr_t oldlenp;
	compat_caddr_t newval;
	compat_size_t newlen;
	unsigned int __unused[4];
};

#ifdef CONFIG_SYSCTL_SYSCALL

asmlinkage long sys32_sysctl(struct sysctl_args32 __user *args)
{
	struct sysctl_args32 tmp;
	int error;
	size_t oldlen;
	size_t __user *oldlenp = NULL;
	unsigned long addr = (((unsigned long)&args->__unused[0]) + 7) & ~7;

	if (copy_from_user(&tmp, args, sizeof(tmp)))
		return -EFAULT;

	if (tmp.oldval && tmp.oldlenp) {
		/* Duh, this is ugly and might not work if sysctl_args
		   is in read-only memory, but do_sysctl does indirectly
		   a lot of uaccess in both directions and we'd have to
		   basically copy the whole sysctl.c here, and
		   glibc's __sysctl uses rw memory for the structure
		   anyway.  */
		if (get_user(oldlen, (u32 __user *)A(tmp.oldlenp)) ||
		    put_user(oldlen, (size_t __user *)addr))
			return -EFAULT;
		oldlenp = (size_t __user *)addr;
	}

	lock_kernel();
	error = do_sysctl((int __user *)A(tmp.name), tmp.nlen, (void __user *)A(tmp.oldval),
			  oldlenp, (void __user *)A(tmp.newval), tmp.newlen);
	unlock_kernel();
	if (oldlenp) {
		if (!error) {
			if (get_user(oldlen, (size_t __user *)addr) ||
			    put_user(oldlen, (u32 __user *)A(tmp.oldlenp)))
				error = -EFAULT;
		}
		copy_to_user(args->__unused, tmp.__unused, sizeof(tmp.__unused));
	}
	return error;
}

#endif /* CONFIG_SYSCTL_SYSCALL */

asmlinkage long sys32_newuname(struct new_utsname __user * name)
{
	int ret = 0;

	down_read(&uts_sem);
	if (copy_to_user(name, utsname(), sizeof *name))
		ret = -EFAULT;
	up_read(&uts_sem);

	if (current->personality == PER_LINUX32 && !ret)
		if (copy_to_user(name->machine, "mips\0\0\0", 8))
			ret = -EFAULT;

	return ret;
}

asmlinkage int sys32_personality(unsigned long personality)
{
	int ret;
	personality &= 0xffffffff;
	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;
}

/* ustat compatibility */
struct ustat32 {
	compat_daddr_t	f_tfree;
	compat_ino_t	f_tinode;
	char		f_fname[6];
	char		f_fpack[6];
};

extern asmlinkage long sys_ustat(dev_t dev, struct ustat __user * ubuf);

asmlinkage int sys32_ustat(dev_t dev, struct ustat32 __user * ubuf32)
{
	int err;
	struct ustat tmp;
	struct ustat32 tmp32;
	mm_segment_t old_fs = get_fs();

	set_fs(KERNEL_DS);
	err = sys_ustat(dev, (struct ustat __user *)&tmp);
	set_fs(old_fs);

	if (err)
		goto out;

	memset(&tmp32, 0, sizeof(struct ustat32));
	tmp32.f_tfree = tmp.f_tfree;
	tmp32.f_tinode = tmp.f_tinode;

	err = copy_to_user(ubuf32, &tmp32, sizeof(struct ustat32)) ? -EFAULT : 0;

out:
	return err;
}

asmlinkage int sys32_sendfile(int out_fd, int in_fd, compat_off_t __user *offset,
	s32 count)
{
	mm_segment_t old_fs = get_fs();
	int ret;
	off_t of;

	if (offset && get_user(of, offset))
		return -EFAULT;

	set_fs(KERNEL_DS);
	ret = sys_sendfile(out_fd, in_fd, offset ? (off_t __user *)&of : NULL, count);
	set_fs(old_fs);

	if (offset && put_user(of, offset))
		return -EFAULT;

	return ret;
}

asmlinkage ssize_t sys32_readahead(int fd, u32 pad0, u64 a2, u64 a3,
                                   size_t count)
{
	return sys_readahead(fd, merge_64(a2, a3), count);
}

asmlinkage long sys32_sync_file_range(int fd, int __pad,
	unsigned long a2, unsigned long a3,
	unsigned long a4, unsigned long a5,
	int flags)
{
	return sys_sync_file_range(fd,
			merge_64(a2, a3), merge_64(a4, a5),
			flags);
}

asmlinkage long sys32_fadvise64_64(int fd, int __pad,
	unsigned long a2, unsigned long a3,
	unsigned long a4, unsigned long a5,
	int flags)
{
	return sys_fadvise64_64(fd,
			merge_64(a2, a3), merge_64(a4, a5),
			flags);
}

asmlinkage long sys32_fallocate(int fd, int mode, unsigned offset_a2,
	unsigned offset_a3, unsigned len_a4, unsigned len_a5)
{
	return sys_fallocate(fd, mode, merge_64(offset_a2, offset_a3),
	                     merge_64(len_a4, len_a5));
}

save_static_function(sys32_clone);
static int noinline __used
_sys32_clone(nabi_no_regargs struct pt_regs regs)
{
	unsigned long clone_flags;
	unsigned long newsp;
	int __user *parent_tidptr, *child_tidptr;

	clone_flags = regs.regs[4];
	newsp = regs.regs[5];
	if (!newsp)
		newsp = regs.regs[29];
	parent_tidptr = (int __user *) regs.regs[6];

	/* Use __dummy4 instead of getting it off the stack, so that
	   syscall() works.  */
	child_tidptr = (int __user *) __dummy4;
	return do_fork(clone_flags, newsp, &regs, 0,
	               parent_tidptr, child_tidptr);
}
Commit	Line	Data
1da177e4 LT	1	/*
	2	* Conversion between 32-bit and 64-bit native system calls.
	3	*
	4	* Copyright (C) 2000 Silicon Graphics, Inc.
	5	* Written by Ulf Carlsson (ulfc@engr.sgi.com)
	6	* sys32_execve from ia64/ia32 code, Feb 2000, Kanoj Sarcar (kanoj@sgi.com)
	7	*/
1da177e4 LT	8	#include <linux/compiler.h>
	9	#include <linux/mm.h>
	10	#include <linux/errno.h>
	11	#include <linux/file.h>
	12	#include <linux/smp_lock.h>
	13	#include <linux/highuid.h>
1da177e4 LT	14	#include <linux/resource.h>
	15	#include <linux/highmem.h>
	16	#include <linux/time.h>
	17	#include <linux/times.h>
	18	#include <linux/poll.h>
	19	#include <linux/slab.h>
	20	#include <linux/skbuff.h>
	21	#include <linux/filter.h>
	22	#include <linux/shm.h>
	23	#include <linux/sem.h>
	24	#include <linux/msg.h>
	25	#include <linux/icmpv6.h>
	26	#include <linux/syscalls.h>
	27	#include <linux/sysctl.h>
	28	#include <linux/utime.h>
	29	#include <linux/utsname.h>
	30	#include <linux/personality.h>
1da177e4 LT	31	#include <linux/dnotify.h>
	32	#include <linux/module.h>
	33	#include <linux/binfmts.h>
	34	#include <linux/security.h>
	35	#include <linux/compat.h>
	36	#include <linux/vfs.h>
cba4fbbf	37	#include <linux/ipc.h>
1da177e4 LT	38
	39	#include <net/sock.h>
	40	#include <net/scm.h>
	41
431dc804	42	#include <asm/compat-signal.h>
1da177e4 LT	43	#include <asm/sim.h>
	44	#include <asm/uaccess.h>
	45	#include <asm/mmu_context.h>
	46	#include <asm/mman.h>
	47
	48	/* Use this to get at 32-bit user passed pointers. */
	49	/* A() macro should be used for places where you e.g.
	50	have some internal variable u32 and just want to get
	51	rid of a compiler warning. AA() has to be used in
	52	places where you want to convert a function argument
	53	to 32bit pointer or when you e.g. access pt_regs
	54	structure and want to consider 32bit registers only.
	55	*/
	56	#define A(__x) ((unsigned long)(__x))
	57	#define AA(__x) ((unsigned long)((int)__x))
	58
	59	#ifdef __MIPSEB__
21a151d8	60	#define merge_64(r1, r2) ((((r1) & 0xffffffffUL) << 32) + ((r2) & 0xffffffffUL))
1da177e4 LT	61	#endif
1da177e4 LT	62	#ifdef __MIPSEL__
21a151d8	63	#define merge_64(r1, r2) ((((r2) & 0xffffffffUL) << 32) + ((r1) & 0xffffffffUL))
1da177e4 LT	64	#endif
1da177e4 LT	65
1da177e4 LT	66	asmlinkage unsigned long
	67	sys32_mmap2(unsigned long addr, unsigned long len, unsigned long prot,
	68	unsigned long flags, unsigned long fd, unsigned long pgoff)
	69	{
	70	struct file * file = NULL;
	71	unsigned long error;
	72
	73	error = -EINVAL;
947df17c PA	74	if (pgoff & (~PAGE_MASK >> 12))
	75	goto out;
	76	pgoff >>= PAGE_SHIFT-12;
	77
1da177e4 LT	78	if (!(flags & MAP_ANONYMOUS)) {
	79	error = -EBADF;
	80	file = fget(fd);
	81	if (!file)
	82	goto out;
	83	}
	84	flags &= ~(MAP_EXECUTABLE \| MAP_DENYWRITE);
	85
	86	down_write(&current->mm->mmap_sem);
	87	error = do_mmap_pgoff(file, addr, len, prot, flags, pgoff);
	88	up_write(&current->mm->mmap_sem);
	89	if (file)
	90	fput(file);
	91
	92	out:
	93	return error;
	94	}
	95
1da177e4 LT	96	/*
	97	* sys_execve() executes a new program.
	98	*/
	99	asmlinkage int sys32_execve(nabi_no_regargs struct pt_regs regs)
	100	{
	101	int error;
	102	char * filename;
	103
	104	filename = getname(compat_ptr(regs.regs[4]));
	105	error = PTR_ERR(filename);
	106	if (IS_ERR(filename))
	107	goto out;
	108	error = compat_do_execve(filename, compat_ptr(regs.regs[5]),
	109	compat_ptr(regs.regs[6]), &regs);
	110	putname(filename);
	111
	112	out:
	113	return error;
	114	}
	115
1da177e4 LT	116	#define RLIM_INFINITY32 0x7fffffff
	117	#define RESOURCE32(x) ((x > RLIM_INFINITY32) ? RLIM_INFINITY32 : x)
	118
	119	struct rlimit32 {
	120	int rlim_cur;
	121	int rlim_max;
	122	};
	123
d4e9cffa RB	124	asmlinkage long sys32_truncate64(const char __user * path,
d4e9cffa RB	125	unsigned long __dummy, int a2, int a3)
1da177e4	126	{
d4e9cffa	127	return sys_truncate(path, merge_64(a2, a3));
1da177e4 LT	128	}
1da177e4 LT	129
1da177e4	130	asmlinkage long sys32_ftruncate64(unsigned int fd, unsigned long __dummy,
d4e9cffa	131	int a2, int a3)
1da177e4	132	{
d4e9cffa	133	return sys_ftruncate(fd, merge_64(a2, a3));
1da177e4 LT	134	}
1da177e4 LT	135
1da177e4	136	asmlinkage int sys32_llseek(unsigned int fd, unsigned int offset_high,
219ac73a	137	unsigned int offset_low, loff_t __user * result,
1da177e4 LT	138	unsigned int origin)
	139	{
	140	return sys_llseek(fd, offset_high, offset_low, result, origin);
	141	}
	142
	143	/* From the Single Unix Spec: pread & pwrite act like lseek to pos + op +
	144	lseek back to original location. They fail just like lseek does on
	145	non-seekable files. */
	146
219ac73a	147	asmlinkage ssize_t sys32_pread(unsigned int fd, char __user * buf,
1da177e4 LT	148	size_t count, u32 unused, u64 a4, u64 a5)
1da177e4 LT	149	{
6ad0013b	150	return sys_pread64(fd, buf, count, merge_64(a4, a5));
1da177e4 LT	151	}
1da177e4 LT	152
219ac73a	153	asmlinkage ssize_t sys32_pwrite(unsigned int fd, const char __user * buf,
1da177e4 LT	154	size_t count, u32 unused, u64 a4, u64 a5)
1da177e4 LT	155	{
6ad0013b	156	return sys_pwrite64(fd, buf, count, merge_64(a4, a5));
1da177e4 LT	157	}
	158
	159	asmlinkage int sys32_sched_rr_get_interval(compat_pid_t pid,
219ac73a	160	struct compat_timespec __user *interval)
1da177e4 LT	161	{
	162	struct timespec t;
	163	int ret;
49a89efb	164	mm_segment_t old_fs = get_fs();
1da177e4	165
49a89efb	166	set_fs(KERNEL_DS);
219ac73a	167	ret = sys_sched_rr_get_interval(pid, (struct timespec __user *)&t);
49a89efb	168	set_fs(old_fs);
1da177e4	169	if (put_user (t.tv_sec, &interval->tv_sec) \|\|
49a89efb	170	__put_user(t.tv_nsec, &interval->tv_nsec))
1da177e4 LT	171	return -EFAULT;
	172	return ret;
	173	}
	174
65f8ebe0 RB	175	#ifdef CONFIG_SYSVIPC
65f8ebe0 RB	176
1da177e4	177	asmlinkage long
49a89efb	178	sys32_ipc(u32 call, int first, int second, int third, u32 ptr, u32 fifth)
1da177e4 LT	179	{
	180	int version, err;
	181
	182	version = call >> 16; /* hack for backward compatibility */
	183	call &= 0xffff;
	184
	185	switch (call) {
	186	case SEMOP:
	187	/* struct sembuf is the same on 32 and 64bit :)) */
05e43966	188	err = sys_semtimedop(first, compat_ptr(ptr), second, NULL);
1da177e4 LT	189	break;
1da177e4 LT	190	case SEMTIMEDOP:
05e43966 AN	191	err = compat_sys_semtimedop(first, compat_ptr(ptr), second,
05e43966 AN	192	compat_ptr(fifth));
1da177e4 LT	193	break;
1da177e4 LT	194	case SEMGET:
05e43966	195	err = sys_semget(first, second, third);
1da177e4 LT	196	break;
1da177e4 LT	197	case SEMCTL:
05e43966	198	err = compat_sys_semctl(first, second, third, compat_ptr(ptr));
1da177e4	199	break;
1da177e4	200	case MSGSND:
05e43966	201	err = compat_sys_msgsnd(first, second, third, compat_ptr(ptr));
1da177e4 LT	202	break;
1da177e4 LT	203	case MSGRCV:
05e43966 AN	204	err = compat_sys_msgrcv(first, second, fifth, third,
05e43966 AN	205	version, compat_ptr(ptr));
1da177e4 LT	206	break;
1da177e4 LT	207	case MSGGET:
05e43966	208	err = sys_msgget((key_t) first, second);
1da177e4 LT	209	break;
1da177e4 LT	210	case MSGCTL:
05e43966	211	err = compat_sys_msgctl(first, second, compat_ptr(ptr));
1da177e4	212	break;
1da177e4	213	case SHMAT:
05e43966 AN	214	err = compat_sys_shmat(first, second, third, version,
05e43966 AN	215	compat_ptr(ptr));
1da177e4 LT	216	break;
1da177e4 LT	217	case SHMDT:
05e43966	218	err = sys_shmdt(compat_ptr(ptr));
1da177e4 LT	219	break;
1da177e4 LT	220	case SHMGET:
05e43966	221	err = sys_shmget(first, (unsigned)second, third);
1da177e4 LT	222	break;
1da177e4 LT	223	case SHMCTL:
05e43966	224	err = compat_sys_shmctl(first, second, compat_ptr(ptr));
1da177e4 LT	225	break;
	226	default:
	227	err = -EINVAL;
	228	break;
	229	}
	230
	231	return err;
	232	}
	233
65f8ebe0 RB	234	#else
	235
	236	asmlinkage long
49a89efb	237	sys32_ipc(u32 call, int first, int second, int third, u32 ptr, u32 fifth)
65f8ebe0 RB	238	{
	239	return -ENOSYS;
	240	}
	241
	242	#endif /* CONFIG_SYSVIPC */
	243
05e43966	244	#ifdef CONFIG_MIPS32_N32
e16d8df0	245	asmlinkage long sysn32_semctl(int semid, int semnum, int cmd, u32 arg)
1da177e4	246	{
05e43966 AN	247	/* compat_sys_semctl expects a pointer to union semun */
05e43966 AN	248	u32 __user *uptr = compat_alloc_user_space(sizeof(u32));
e16d8df0	249	if (put_user(arg, uptr))
05e43966 AN	250	return -EFAULT;
05e43966 AN	251	return compat_sys_semctl(semid, semnum, cmd, uptr);
1da177e4	252	}
e16d8df0 AN	253
	254	asmlinkage long sysn32_msgsnd(int msqid, u32 msgp, unsigned msgsz, int msgflg)
	255	{
	256	return compat_sys_msgsnd(msqid, msgsz, msgflg, compat_ptr(msgp));
	257	}
	258
	259	asmlinkage long sysn32_msgrcv(int msqid, u32 msgp, size_t msgsz, int msgtyp,
	260	int msgflg)
	261	{
	262	return compat_sys_msgrcv(msqid, msgsz, msgtyp, msgflg, IPC_64,
	263	compat_ptr(msgp));
	264	}
05e43966	265	#endif
1da177e4 LT	266
	267	struct sysctl_args32
	268	{
	269	compat_caddr_t name;
	270	int nlen;
	271	compat_caddr_t oldval;
	272	compat_caddr_t oldlenp;
	273	compat_caddr_t newval;
	274	compat_size_t newlen;
	275	unsigned int __unused[4];
	276	};
	277
b89a8171	278	#ifdef CONFIG_SYSCTL_SYSCALL
1da177e4	279
219ac73a	280	asmlinkage long sys32_sysctl(struct sysctl_args32 __user *args)
1da177e4 LT	281	{
	282	struct sysctl_args32 tmp;
	283	int error;
219ac73a AN	284	size_t oldlen;
	285	size_t __user *oldlenp = NULL;
	286	unsigned long addr = (((unsigned long)&args->__unused[0]) + 7) & ~7;
1da177e4 LT	287
	288	if (copy_from_user(&tmp, args, sizeof(tmp)))
	289	return -EFAULT;
	290
	291	if (tmp.oldval && tmp.oldlenp) {
	292	/* Duh, this is ugly and might not work if sysctl_args
	293	is in read-only memory, but do_sysctl does indirectly
	294	a lot of uaccess in both directions and we'd have to
	295	basically copy the whole sysctl.c here, and
	296	glibc's __sysctl uses rw memory for the structure
	297	anyway. */
219ac73a AN	298	if (get_user(oldlen, (u32 __user *)A(tmp.oldlenp)) \|\|
219ac73a AN	299	put_user(oldlen, (size_t __user *)addr))
1da177e4	300	return -EFAULT;
219ac73a	301	oldlenp = (size_t __user *)addr;
1da177e4 LT	302	}
	303
	304	lock_kernel();
219ac73a AN	305	error = do_sysctl((int __user )A(tmp.name), tmp.nlen, (void __user )A(tmp.oldval),
219ac73a AN	306	oldlenp, (void __user *)A(tmp.newval), tmp.newlen);
1da177e4 LT	307	unlock_kernel();
	308	if (oldlenp) {
	309	if (!error) {
219ac73a AN	310	if (get_user(oldlen, (size_t __user *)addr) \|\|
219ac73a AN	311	put_user(oldlen, (u32 __user *)A(tmp.oldlenp)))
1da177e4 LT	312	error = -EFAULT;
	313	}
	314	copy_to_user(args->__unused, tmp.__unused, sizeof(tmp.__unused));
	315	}
	316	return error;
	317	}
	318
b89a8171	319	#endif /* CONFIG_SYSCTL_SYSCALL */
1da177e4	320
219ac73a	321	asmlinkage long sys32_newuname(struct new_utsname __user * name)
1da177e4 LT	322	{
	323	int ret = 0;
	324
	325	down_read(&uts_sem);
e9ff3990	326	if (copy_to_user(name, utsname(), sizeof *name))
1da177e4 LT	327	ret = -EFAULT;
	328	up_read(&uts_sem);
	329
	330	if (current->personality == PER_LINUX32 && !ret)
	331	if (copy_to_user(name->machine, "mips\0\0\0", 8))
	332	ret = -EFAULT;
	333
	334	return ret;
	335	}
	336
	337	asmlinkage int sys32_personality(unsigned long personality)
	338	{
	339	int ret;
53571ce4 TS	340	personality &= 0xffffffff;
	341	if (personality(current->personality) == PER_LINUX32 &&
	342	personality == PER_LINUX)
1da177e4 LT	343	personality = PER_LINUX32;
	344	ret = sys_personality(personality);
	345	if (ret == PER_LINUX32)
	346	ret = PER_LINUX;
	347	return ret;
	348	}
	349
	350	/* ustat compatibility */
	351	struct ustat32 {
	352	compat_daddr_t f_tfree;
	353	compat_ino_t f_tinode;
	354	char f_fname[6];
	355	char f_fpack[6];
	356	};
	357
219ac73a	358	extern asmlinkage long sys_ustat(dev_t dev, struct ustat __user * ubuf);
1da177e4	359
219ac73a	360	asmlinkage int sys32_ustat(dev_t dev, struct ustat32 __user * ubuf32)
1da177e4 LT	361	{
1da177e4 LT	362	int err;
e0daad44	363	struct ustat tmp;
1da177e4 LT	364	struct ustat32 tmp32;
	365	mm_segment_t old_fs = get_fs();
	366
	367	set_fs(KERNEL_DS);
219ac73a	368	err = sys_ustat(dev, (struct ustat __user *)&tmp);
49a89efb	369	set_fs(old_fs);
1da177e4 LT	370
	371	if (err)
	372	goto out;
	373
21a151d8	374	memset(&tmp32, 0, sizeof(struct ustat32));
e0daad44 RB	375	tmp32.f_tfree = tmp.f_tfree;
e0daad44 RB	376	tmp32.f_tinode = tmp.f_tinode;
1da177e4	377
21a151d8	378	err = copy_to_user(ubuf32, &tmp32, sizeof(struct ustat32)) ? -EFAULT : 0;
1da177e4 LT	379
	380	out:
	381	return err;
	382	}
	383
219ac73a	384	asmlinkage int sys32_sendfile(int out_fd, int in_fd, compat_off_t __user *offset,
1da177e4 LT	385	s32 count)
	386	{
	387	mm_segment_t old_fs = get_fs();
	388	int ret;
	389	off_t of;
42a3b4f2	390
1da177e4 LT	391	if (offset && get_user(of, offset))
1da177e4 LT	392	return -EFAULT;
42a3b4f2	393
1da177e4	394	set_fs(KERNEL_DS);
219ac73a	395	ret = sys_sendfile(out_fd, in_fd, offset ? (off_t __user *)&of : NULL, count);
1da177e4	396	set_fs(old_fs);
42a3b4f2	397
1da177e4 LT	398	if (offset && put_user(of, offset))
1da177e4 LT	399	return -EFAULT;
42a3b4f2	400
1da177e4 LT	401	return ret;
	402	}
	403
	404	asmlinkage ssize_t sys32_readahead(int fd, u32 pad0, u64 a2, u64 a3,
	405	size_t count)
	406	{
	407	return sys_readahead(fd, merge_64(a2, a3), count);
	408	}
	409
a8d587a7 RB	410	asmlinkage long sys32_sync_file_range(int fd, int __pad,
	411	unsigned long a2, unsigned long a3,
	412	unsigned long a4, unsigned long a5,
	413	int flags)
	414	{
	415	return sys_sync_file_range(fd,
	416	merge_64(a2, a3), merge_64(a4, a5),
	417	flags);
	418	}
	419
8676d2e0 AN	420	asmlinkage long sys32_fadvise64_64(int fd, int __pad,
	421	unsigned long a2, unsigned long a3,
	422	unsigned long a4, unsigned long a5,
	423	int flags)
	424	{
	425	return sys_fadvise64_64(fd,
	426	merge_64(a2, a3), merge_64(a4, a5),
	427	flags);
	428	}
	429
4dc46775 RB	430	asmlinkage long sys32_fallocate(int fd, int mode, unsigned offset_a2,
	431	unsigned offset_a3, unsigned len_a4, unsigned len_a5)
	432	{
	433	return sys_fallocate(fd, mode, merge_64(offset_a2, offset_a3),
	434	merge_64(len_a4, len_a5));
	435	}
	436
3c37026d	437	save_static_function(sys32_clone);
f5dbeaf5	438	static int noinline __used
3c37026d RB	439	_sys32_clone(nabi_no_regargs struct pt_regs regs)
	440	{
	441	unsigned long clone_flags;
	442	unsigned long newsp;
	443	int __user parent_tidptr, child_tidptr;
	444
	445	clone_flags = regs.regs[4];
	446	newsp = regs.regs[5];
	447	if (!newsp)
	448	newsp = regs.regs[29];
219ac73a	449	parent_tidptr = (int __user *) regs.regs[6];
3c37026d RB	450
	451	/* Use __dummy4 instead of getting it off the stack, so that
	452	syscall() works. */
	453	child_tidptr = (int __user *) __dummy4;
	454	return do_fork(clone_flags, newsp, &regs, 0,
	455	parent_tidptr, child_tidptr);
	456	}