[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 ([email protected])
 * sys32_execve from ia64/ia32 code, Feb 2000, Kanoj Sarcar ([email protected])
 */
#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/dirent.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 <net/sock.h>
#include <net/scm.h>

#include <asm/compat-signal.h>
#include <asm/ipc.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

/*
 * Revalidate the inode. This is required for proper NFS attribute caching.
 */

int cp_compat_stat(struct kstat *stat, struct compat_stat __user *statbuf)
{
	struct compat_stat tmp;

	if (!new_valid_dev(stat->dev) || !new_valid_dev(stat->rdev))
		return -EOVERFLOW;

	memset(&tmp, 0, sizeof(tmp));
	tmp.st_dev = new_encode_dev(stat->dev);
	tmp.st_ino = stat->ino;
	if (sizeof(tmp.st_ino) < sizeof(stat->ino) && tmp.st_ino != stat->ino)
		return -EOVERFLOW;
	tmp.st_mode = stat->mode;
	tmp.st_nlink = stat->nlink;
	SET_UID(tmp.st_uid, stat->uid);
	SET_GID(tmp.st_gid, stat->gid);
	tmp.st_rdev = new_encode_dev(stat->rdev);
	tmp.st_size = stat->size;
	tmp.st_atime = stat->atime.tv_sec;
	tmp.st_mtime = stat->mtime.tv_sec;
	tmp.st_ctime = stat->ctime.tv_sec;
#ifdef STAT_HAVE_NSEC
	tmp.st_atime_nsec = stat->atime.tv_nsec;
	tmp.st_mtime_nsec = stat->mtime.tv_nsec;
	tmp.st_ctime_nsec = stat->ctime.tv_nsec;
#endif
	tmp.st_blocks = stat->blocks;
	tmp.st_blksize = stat->blksize;
	return copy_to_user(statbuf,&tmp,sizeof(tmp)) ? -EFAULT : 0;
}

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;
}


asmlinkage int sys_truncate64(const char __user *path, unsigned int high,
			      unsigned int low)
{
	if ((int)high < 0)
		return -EINVAL;
	return sys_truncate(path, ((long) high << 32) | low);
}

asmlinkage int sys_ftruncate64(unsigned int fd, unsigned int high,
			       unsigned int low)
{
	if ((int)high < 0)
		return -EINVAL;
	return sys_ftruncate(fd, ((long) high << 32) | low);
}

/*
 * 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;
};

#ifdef __MIPSEB__
asmlinkage long sys32_truncate64(const char __user * path, unsigned long __dummy,
	int length_hi, int length_lo)
#endif
#ifdef __MIPSEL__
asmlinkage long sys32_truncate64(const char __user * path, unsigned long __dummy,
	int length_lo, int length_hi)
#endif
{
	loff_t length;

	length = ((unsigned long) length_hi << 32) | (unsigned int) length_lo;

	return sys_truncate(path, length);
}

#ifdef __MIPSEB__
asmlinkage long sys32_ftruncate64(unsigned int fd, unsigned long __dummy,
	int length_hi, int length_lo)
#endif
#ifdef __MIPSEL__
asmlinkage long sys32_ftruncate64(unsigned int fd, unsigned long __dummy,
	int length_lo, int length_hi)
#endif
{
	loff_t length;

	length = ((unsigned long) length_hi << 32) | (unsigned int) length_lo;

	return sys_ftruncate(fd, length);
}

static inline long
get_tv32(struct timeval *o, struct compat_timeval __user *i)
{
	return (!access_ok(VERIFY_READ, i, sizeof(*i)) ||
		(__get_user(o->tv_sec, &i->tv_sec) |
		 __get_user(o->tv_usec, &i->tv_usec)));
}

static inline long
put_tv32(struct compat_timeval __user *o, struct timeval *i)
{
	return (!access_ok(VERIFY_WRITE, o, sizeof(*o)) ||
		(__put_user(i->tv_sec, &o->tv_sec) |
		 __put_user(i->tv_usec, &o->tv_usec)));
}

extern struct timezone sys_tz;

asmlinkage int
sys32_gettimeofday(struct compat_timeval __user *tv, struct timezone __user *tz)
{
	if (tv) {
		struct timeval ktv;
		do_gettimeofday(&ktv);
		if (put_tv32(tv, &ktv))
			return -EFAULT;
	}
	if (tz) {
		if (copy_to_user(tz, &sys_tz, sizeof(sys_tz)))
			return -EFAULT;
	}
	return 0;
}

static inline long get_ts32(struct timespec *o, struct compat_timeval __user *i)
{
	long usec;

	if (!access_ok(VERIFY_READ, i, sizeof(*i)))
		return -EFAULT;
	if (__get_user(o->tv_sec, &i->tv_sec))
		return -EFAULT;
	if (__get_user(usec, &i->tv_usec))
		return -EFAULT;
	o->tv_nsec = usec * 1000;
		return 0;
}

asmlinkage int
sys32_settimeofday(struct compat_timeval __user *tv, struct timezone __user *tz)
{
	struct timespec kts;
	struct timezone ktz;

 	if (tv) {
		if (get_ts32(&kts, tv))
			return -EFAULT;
	}
	if (tz) {
		if (copy_from_user(&ktz, tz, sizeof(ktz)))
			return -EFAULT;
	}

	return do_sys_settimeofday(tv ? &kts : NULL, tz ? &ktz : NULL);
}

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 ([email protected])
	6	* sys32_execve from ia64/ia32 code, Feb 2000, Kanoj Sarcar ([email protected])
	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>
	14	#include <linux/dirent.h>
	15	#include <linux/resource.h>
	16	#include <linux/highmem.h>
	17	#include <linux/time.h>
	18	#include <linux/times.h>
	19	#include <linux/poll.h>
	20	#include <linux/slab.h>
	21	#include <linux/skbuff.h>
	22	#include <linux/filter.h>
	23	#include <linux/shm.h>
	24	#include <linux/sem.h>
	25	#include <linux/msg.h>
	26	#include <linux/icmpv6.h>
	27	#include <linux/syscalls.h>
	28	#include <linux/sysctl.h>
	29	#include <linux/utime.h>
	30	#include <linux/utsname.h>
	31	#include <linux/personality.h>
1da177e4 LT	32	#include <linux/dnotify.h>
	33	#include <linux/module.h>
	34	#include <linux/binfmts.h>
	35	#include <linux/security.h>
	36	#include <linux/compat.h>
	37	#include <linux/vfs.h>
	38
	39	#include <net/sock.h>
	40	#include <net/scm.h>
	41
431dc804	42	#include <asm/compat-signal.h>
1da177e4 LT	43	#include <asm/ipc.h>
	44	#include <asm/sim.h>
	45	#include <asm/uaccess.h>
	46	#include <asm/mmu_context.h>
	47	#include <asm/mman.h>
	48
	49	/* Use this to get at 32-bit user passed pointers. */
	50	/* A() macro should be used for places where you e.g.
	51	have some internal variable u32 and just want to get
	52	rid of a compiler warning. AA() has to be used in
	53	places where you want to convert a function argument
	54	to 32bit pointer or when you e.g. access pt_regs
	55	structure and want to consider 32bit registers only.
	56	*/
	57	#define A(__x) ((unsigned long)(__x))
	58	#define AA(__x) ((unsigned long)((int)__x))
	59
	60	#ifdef __MIPSEB__
	61	#define merge_64(r1,r2) ((((r1) & 0xffffffffUL) << 32) + ((r2) & 0xffffffffUL))
	62	#endif
	63	#ifdef __MIPSEL__
	64	#define merge_64(r1,r2) ((((r2) & 0xffffffffUL) << 32) + ((r1) & 0xffffffffUL))
	65	#endif
	66
	67	/*
	68	* Revalidate the inode. This is required for proper NFS attribute caching.
	69	*/
	70
219ac73a	71	int cp_compat_stat(struct kstat stat, struct compat_stat __user statbuf)
1da177e4 LT	72	{
	73	struct compat_stat tmp;
	74
	75	if (!new_valid_dev(stat->dev) \|\| !new_valid_dev(stat->rdev))
	76	return -EOVERFLOW;
	77
	78	memset(&tmp, 0, sizeof(tmp));
	79	tmp.st_dev = new_encode_dev(stat->dev);
	80	tmp.st_ino = stat->ino;
afefdbb2 DH	81	if (sizeof(tmp.st_ino) < sizeof(stat->ino) && tmp.st_ino != stat->ino)
afefdbb2 DH	82	return -EOVERFLOW;
1da177e4 LT	83	tmp.st_mode = stat->mode;
	84	tmp.st_nlink = stat->nlink;
	85	SET_UID(tmp.st_uid, stat->uid);
	86	SET_GID(tmp.st_gid, stat->gid);
	87	tmp.st_rdev = new_encode_dev(stat->rdev);
	88	tmp.st_size = stat->size;
	89	tmp.st_atime = stat->atime.tv_sec;
	90	tmp.st_mtime = stat->mtime.tv_sec;
	91	tmp.st_ctime = stat->ctime.tv_sec;
	92	#ifdef STAT_HAVE_NSEC
	93	tmp.st_atime_nsec = stat->atime.tv_nsec;
	94	tmp.st_mtime_nsec = stat->mtime.tv_nsec;
	95	tmp.st_ctime_nsec = stat->ctime.tv_nsec;
	96	#endif
	97	tmp.st_blocks = stat->blocks;
	98	tmp.st_blksize = stat->blksize;
	99	return copy_to_user(statbuf,&tmp,sizeof(tmp)) ? -EFAULT : 0;
	100	}
	101
	102	asmlinkage unsigned long
	103	sys32_mmap2(unsigned long addr, unsigned long len, unsigned long prot,
	104	unsigned long flags, unsigned long fd, unsigned long pgoff)
	105	{
	106	struct file * file = NULL;
	107	unsigned long error;
	108
	109	error = -EINVAL;
947df17c PA	110	if (pgoff & (~PAGE_MASK >> 12))
	111	goto out;
	112	pgoff >>= PAGE_SHIFT-12;
	113
1da177e4 LT	114	if (!(flags & MAP_ANONYMOUS)) {
	115	error = -EBADF;
	116	file = fget(fd);
	117	if (!file)
	118	goto out;
	119	}
	120	flags &= ~(MAP_EXECUTABLE \| MAP_DENYWRITE);
	121
	122	down_write(&current->mm->mmap_sem);
	123	error = do_mmap_pgoff(file, addr, len, prot, flags, pgoff);
	124	up_write(&current->mm->mmap_sem);
	125	if (file)
	126	fput(file);
	127
	128	out:
	129	return error;
	130	}
	131
	132
219ac73a	133	asmlinkage int sys_truncate64(const char __user *path, unsigned int high,
1da177e4 LT	134	unsigned int low)
	135	{
	136	if ((int)high < 0)
	137	return -EINVAL;
	138	return sys_truncate(path, ((long) high << 32) \| low);
	139	}
	140
	141	asmlinkage int sys_ftruncate64(unsigned int fd, unsigned int high,
	142	unsigned int low)
	143	{
	144	if ((int)high < 0)
	145	return -EINVAL;
	146	return sys_ftruncate(fd, ((long) high << 32) \| low);
	147	}
	148
	149	/*
	150	* sys_execve() executes a new program.
	151	*/
	152	asmlinkage int sys32_execve(nabi_no_regargs struct pt_regs regs)
	153	{
	154	int error;
	155	char * filename;
	156
	157	filename = getname(compat_ptr(regs.regs[4]));
	158	error = PTR_ERR(filename);
	159	if (IS_ERR(filename))
	160	goto out;
	161	error = compat_do_execve(filename, compat_ptr(regs.regs[5]),
	162	compat_ptr(regs.regs[6]), &regs);
	163	putname(filename);
	164
	165	out:
	166	return error;
	167	}
	168
1da177e4 LT	169	#define RLIM_INFINITY32 0x7fffffff
	170	#define RESOURCE32(x) ((x > RLIM_INFINITY32) ? RLIM_INFINITY32 : x)
	171
	172	struct rlimit32 {
	173	int rlim_cur;
	174	int rlim_max;
	175	};
	176
	177	#ifdef __MIPSEB__
219ac73a	178	asmlinkage long sys32_truncate64(const char __user * path, unsigned long __dummy,
1da177e4 LT	179	int length_hi, int length_lo)
	180	#endif
	181	#ifdef __MIPSEL__
219ac73a	182	asmlinkage long sys32_truncate64(const char __user * path, unsigned long __dummy,
1da177e4 LT	183	int length_lo, int length_hi)
	184	#endif
	185	{
	186	loff_t length;
	187
	188	length = ((unsigned long) length_hi << 32) \| (unsigned int) length_lo;
	189
	190	return sys_truncate(path, length);
	191	}
	192
	193	#ifdef __MIPSEB__
	194	asmlinkage long sys32_ftruncate64(unsigned int fd, unsigned long __dummy,
	195	int length_hi, int length_lo)
	196	#endif
	197	#ifdef __MIPSEL__
	198	asmlinkage long sys32_ftruncate64(unsigned int fd, unsigned long __dummy,
	199	int length_lo, int length_hi)
	200	#endif
	201	{
	202	loff_t length;
	203
	204	length = ((unsigned long) length_hi << 32) \| (unsigned int) length_lo;
	205
	206	return sys_ftruncate(fd, length);
	207	}
	208
	209	static inline long
219ac73a	210	get_tv32(struct timeval o, struct compat_timeval __user i)
1da177e4 LT	211	{
	212	return (!access_ok(VERIFY_READ, i, sizeof(*i)) \|\|
	213	(__get_user(o->tv_sec, &i->tv_sec) \|
	214	__get_user(o->tv_usec, &i->tv_usec)));
	215	}
	216
	217	static inline long
219ac73a	218	put_tv32(struct compat_timeval __user o, struct timeval i)
1da177e4 LT	219	{
	220	return (!access_ok(VERIFY_WRITE, o, sizeof(*o)) \|\|
	221	(__put_user(i->tv_sec, &o->tv_sec) \|
	222	__put_user(i->tv_usec, &o->tv_usec)));
	223	}
	224
	225	extern struct timezone sys_tz;
	226
	227	asmlinkage int
219ac73a	228	sys32_gettimeofday(struct compat_timeval __user tv, struct timezone __user tz)
1da177e4 LT	229	{
	230	if (tv) {
	231	struct timeval ktv;
	232	do_gettimeofday(&ktv);
	233	if (put_tv32(tv, &ktv))
	234	return -EFAULT;
	235	}
	236	if (tz) {
	237	if (copy_to_user(tz, &sys_tz, sizeof(sys_tz)))
	238	return -EFAULT;
	239	}
	240	return 0;
	241	}
	242
219ac73a	243	static inline long get_ts32(struct timespec o, struct compat_timeval __user i)
1da177e4 LT	244	{
	245	long usec;
	246
	247	if (!access_ok(VERIFY_READ, i, sizeof(*i)))
	248	return -EFAULT;
	249	if (__get_user(o->tv_sec, &i->tv_sec))
	250	return -EFAULT;
	251	if (__get_user(usec, &i->tv_usec))
	252	return -EFAULT;
	253	o->tv_nsec = usec * 1000;
	254	return 0;
	255	}
	256
	257	asmlinkage int
219ac73a	258	sys32_settimeofday(struct compat_timeval __user tv, struct timezone __user tz)
1da177e4 LT	259	{
	260	struct timespec kts;
	261	struct timezone ktz;
	262
	263	if (tv) {
	264	if (get_ts32(&kts, tv))
	265	return -EFAULT;
	266	}
	267	if (tz) {
	268	if (copy_from_user(&ktz, tz, sizeof(ktz)))
	269	return -EFAULT;
	270	}
	271
	272	return do_sys_settimeofday(tv ? &kts : NULL, tz ? &ktz : NULL);
	273	}
	274
	275	asmlinkage int sys32_llseek(unsigned int fd, unsigned int offset_high,
219ac73a	276	unsigned int offset_low, loff_t __user * result,
1da177e4 LT	277	unsigned int origin)
	278	{
	279	return sys_llseek(fd, offset_high, offset_low, result, origin);
	280	}
	281
	282	/* From the Single Unix Spec: pread & pwrite act like lseek to pos + op +
	283	lseek back to original location. They fail just like lseek does on
	284	non-seekable files. */
	285
219ac73a	286	asmlinkage ssize_t sys32_pread(unsigned int fd, char __user * buf,
1da177e4 LT	287	size_t count, u32 unused, u64 a4, u64 a5)
1da177e4 LT	288	{
6ad0013b	289	return sys_pread64(fd, buf, count, merge_64(a4, a5));
1da177e4 LT	290	}
1da177e4 LT	291
219ac73a	292	asmlinkage ssize_t sys32_pwrite(unsigned int fd, const char __user * buf,
1da177e4 LT	293	size_t count, u32 unused, u64 a4, u64 a5)
1da177e4 LT	294	{
6ad0013b	295	return sys_pwrite64(fd, buf, count, merge_64(a4, a5));
1da177e4 LT	296	}
	297
	298	asmlinkage int sys32_sched_rr_get_interval(compat_pid_t pid,
219ac73a	299	struct compat_timespec __user *interval)
1da177e4 LT	300	{
	301	struct timespec t;
	302	int ret;
49a89efb	303	mm_segment_t old_fs = get_fs();
1da177e4	304
49a89efb	305	set_fs(KERNEL_DS);
219ac73a	306	ret = sys_sched_rr_get_interval(pid, (struct timespec __user *)&t);
49a89efb	307	set_fs(old_fs);
1da177e4	308	if (put_user (t.tv_sec, &interval->tv_sec) \|\|
49a89efb	309	__put_user(t.tv_nsec, &interval->tv_nsec))
1da177e4 LT	310	return -EFAULT;
	311	return ret;
	312	}
	313
65f8ebe0 RB	314	#ifdef CONFIG_SYSVIPC
65f8ebe0 RB	315
1da177e4	316	asmlinkage long
49a89efb	317	sys32_ipc(u32 call, int first, int second, int third, u32 ptr, u32 fifth)
1da177e4 LT	318	{
	319	int version, err;
	320
	321	version = call >> 16; /* hack for backward compatibility */
	322	call &= 0xffff;
	323
	324	switch (call) {
	325	case SEMOP:
	326	/* struct sembuf is the same on 32 and 64bit :)) */
05e43966	327	err = sys_semtimedop(first, compat_ptr(ptr), second, NULL);
1da177e4 LT	328	break;
1da177e4 LT	329	case SEMTIMEDOP:
05e43966 AN	330	err = compat_sys_semtimedop(first, compat_ptr(ptr), second,
05e43966 AN	331	compat_ptr(fifth));
1da177e4 LT	332	break;
1da177e4 LT	333	case SEMGET:
05e43966	334	err = sys_semget(first, second, third);
1da177e4 LT	335	break;
1da177e4 LT	336	case SEMCTL:
05e43966	337	err = compat_sys_semctl(first, second, third, compat_ptr(ptr));
1da177e4	338	break;
1da177e4	339	case MSGSND:
05e43966	340	err = compat_sys_msgsnd(first, second, third, compat_ptr(ptr));
1da177e4 LT	341	break;
1da177e4 LT	342	case MSGRCV:
05e43966 AN	343	err = compat_sys_msgrcv(first, second, fifth, third,
05e43966 AN	344	version, compat_ptr(ptr));
1da177e4 LT	345	break;
1da177e4 LT	346	case MSGGET:
05e43966	347	err = sys_msgget((key_t) first, second);
1da177e4 LT	348	break;
1da177e4 LT	349	case MSGCTL:
05e43966	350	err = compat_sys_msgctl(first, second, compat_ptr(ptr));
1da177e4	351	break;
1da177e4	352	case SHMAT:
05e43966 AN	353	err = compat_sys_shmat(first, second, third, version,
05e43966 AN	354	compat_ptr(ptr));
1da177e4 LT	355	break;
1da177e4 LT	356	case SHMDT:
05e43966	357	err = sys_shmdt(compat_ptr(ptr));
1da177e4 LT	358	break;
1da177e4 LT	359	case SHMGET:
05e43966	360	err = sys_shmget(first, (unsigned)second, third);
1da177e4 LT	361	break;
1da177e4 LT	362	case SHMCTL:
05e43966	363	err = compat_sys_shmctl(first, second, compat_ptr(ptr));
1da177e4 LT	364	break;
	365	default:
	366	err = -EINVAL;
	367	break;
	368	}
	369
	370	return err;
	371	}
	372
65f8ebe0 RB	373	#else
	374
	375	asmlinkage long
49a89efb	376	sys32_ipc(u32 call, int first, int second, int third, u32 ptr, u32 fifth)
65f8ebe0 RB	377	{
	378	return -ENOSYS;
	379	}
	380
	381	#endif /* CONFIG_SYSVIPC */
	382
05e43966	383	#ifdef CONFIG_MIPS32_N32
e16d8df0	384	asmlinkage long sysn32_semctl(int semid, int semnum, int cmd, u32 arg)
1da177e4	385	{
05e43966 AN	386	/* compat_sys_semctl expects a pointer to union semun */
05e43966 AN	387	u32 __user *uptr = compat_alloc_user_space(sizeof(u32));
e16d8df0	388	if (put_user(arg, uptr))
05e43966 AN	389	return -EFAULT;
05e43966 AN	390	return compat_sys_semctl(semid, semnum, cmd, uptr);
1da177e4	391	}
e16d8df0 AN	392
	393	asmlinkage long sysn32_msgsnd(int msqid, u32 msgp, unsigned msgsz, int msgflg)
	394	{
	395	return compat_sys_msgsnd(msqid, msgsz, msgflg, compat_ptr(msgp));
	396	}
	397
	398	asmlinkage long sysn32_msgrcv(int msqid, u32 msgp, size_t msgsz, int msgtyp,
	399	int msgflg)
	400	{
	401	return compat_sys_msgrcv(msqid, msgsz, msgtyp, msgflg, IPC_64,
	402	compat_ptr(msgp));
	403	}
05e43966	404	#endif
1da177e4 LT	405
	406	struct sysctl_args32
	407	{
	408	compat_caddr_t name;
	409	int nlen;
	410	compat_caddr_t oldval;
	411	compat_caddr_t oldlenp;
	412	compat_caddr_t newval;
	413	compat_size_t newlen;
	414	unsigned int __unused[4];
	415	};
	416
b89a8171	417	#ifdef CONFIG_SYSCTL_SYSCALL
1da177e4	418
219ac73a	419	asmlinkage long sys32_sysctl(struct sysctl_args32 __user *args)
1da177e4 LT	420	{
	421	struct sysctl_args32 tmp;
	422	int error;
219ac73a AN	423	size_t oldlen;
	424	size_t __user *oldlenp = NULL;
	425	unsigned long addr = (((unsigned long)&args->__unused[0]) + 7) & ~7;
1da177e4 LT	426
	427	if (copy_from_user(&tmp, args, sizeof(tmp)))
	428	return -EFAULT;
	429
	430	if (tmp.oldval && tmp.oldlenp) {
	431	/* Duh, this is ugly and might not work if sysctl_args
	432	is in read-only memory, but do_sysctl does indirectly
	433	a lot of uaccess in both directions and we'd have to
	434	basically copy the whole sysctl.c here, and
	435	glibc's __sysctl uses rw memory for the structure
	436	anyway. */
219ac73a AN	437	if (get_user(oldlen, (u32 __user *)A(tmp.oldlenp)) \|\|
219ac73a AN	438	put_user(oldlen, (size_t __user *)addr))
1da177e4	439	return -EFAULT;
219ac73a	440	oldlenp = (size_t __user *)addr;
1da177e4 LT	441	}
	442
	443	lock_kernel();
219ac73a AN	444	error = do_sysctl((int __user )A(tmp.name), tmp.nlen, (void __user )A(tmp.oldval),
219ac73a AN	445	oldlenp, (void __user *)A(tmp.newval), tmp.newlen);
1da177e4 LT	446	unlock_kernel();
	447	if (oldlenp) {
	448	if (!error) {
219ac73a AN	449	if (get_user(oldlen, (size_t __user *)addr) \|\|
219ac73a AN	450	put_user(oldlen, (u32 __user *)A(tmp.oldlenp)))
1da177e4 LT	451	error = -EFAULT;
	452	}
	453	copy_to_user(args->__unused, tmp.__unused, sizeof(tmp.__unused));
	454	}
	455	return error;
	456	}
	457
b89a8171	458	#endif /* CONFIG_SYSCTL_SYSCALL */
1da177e4	459
219ac73a	460	asmlinkage long sys32_newuname(struct new_utsname __user * name)
1da177e4 LT	461	{
	462	int ret = 0;
	463
	464	down_read(&uts_sem);
e9ff3990	465	if (copy_to_user(name, utsname(), sizeof *name))
1da177e4 LT	466	ret = -EFAULT;
	467	up_read(&uts_sem);
	468
	469	if (current->personality == PER_LINUX32 && !ret)
	470	if (copy_to_user(name->machine, "mips\0\0\0", 8))
	471	ret = -EFAULT;
	472
	473	return ret;
	474	}
	475
	476	asmlinkage int sys32_personality(unsigned long personality)
	477	{
	478	int ret;
53571ce4 TS	479	personality &= 0xffffffff;
	480	if (personality(current->personality) == PER_LINUX32 &&
	481	personality == PER_LINUX)
1da177e4 LT	482	personality = PER_LINUX32;
	483	ret = sys_personality(personality);
	484	if (ret == PER_LINUX32)
	485	ret = PER_LINUX;
	486	return ret;
	487	}
	488
	489	/* ustat compatibility */
	490	struct ustat32 {
	491	compat_daddr_t f_tfree;
	492	compat_ino_t f_tinode;
	493	char f_fname[6];
	494	char f_fpack[6];
	495	};
	496
219ac73a	497	extern asmlinkage long sys_ustat(dev_t dev, struct ustat __user * ubuf);
1da177e4	498
219ac73a	499	asmlinkage int sys32_ustat(dev_t dev, struct ustat32 __user * ubuf32)
1da177e4 LT	500	{
1da177e4 LT	501	int err;
e0daad44	502	struct ustat tmp;
1da177e4 LT	503	struct ustat32 tmp32;
	504	mm_segment_t old_fs = get_fs();
	505
	506	set_fs(KERNEL_DS);
219ac73a	507	err = sys_ustat(dev, (struct ustat __user *)&tmp);
49a89efb	508	set_fs(old_fs);
1da177e4 LT	509
	510	if (err)
	511	goto out;
	512
e0daad44 RB	513	memset(&tmp32,0,sizeof(struct ustat32));
	514	tmp32.f_tfree = tmp.f_tfree;
	515	tmp32.f_tinode = tmp.f_tinode;
1da177e4	516
e0daad44	517	err = copy_to_user(ubuf32,&tmp32,sizeof(struct ustat32)) ? -EFAULT : 0;
1da177e4 LT	518
	519	out:
	520	return err;
	521	}
	522
219ac73a	523	asmlinkage int sys32_sendfile(int out_fd, int in_fd, compat_off_t __user *offset,
1da177e4 LT	524	s32 count)
	525	{
	526	mm_segment_t old_fs = get_fs();
	527	int ret;
	528	off_t of;
42a3b4f2	529
1da177e4 LT	530	if (offset && get_user(of, offset))
1da177e4 LT	531	return -EFAULT;
42a3b4f2	532
1da177e4	533	set_fs(KERNEL_DS);
219ac73a	534	ret = sys_sendfile(out_fd, in_fd, offset ? (off_t __user *)&of : NULL, count);
1da177e4	535	set_fs(old_fs);
42a3b4f2	536
1da177e4 LT	537	if (offset && put_user(of, offset))
1da177e4 LT	538	return -EFAULT;
42a3b4f2	539
1da177e4 LT	540	return ret;
	541	}
	542
	543	asmlinkage ssize_t sys32_readahead(int fd, u32 pad0, u64 a2, u64 a3,
	544	size_t count)
	545	{
	546	return sys_readahead(fd, merge_64(a2, a3), count);
	547	}
	548
a8d587a7 RB	549	asmlinkage long sys32_sync_file_range(int fd, int __pad,
	550	unsigned long a2, unsigned long a3,
	551	unsigned long a4, unsigned long a5,
	552	int flags)
	553	{
	554	return sys_sync_file_range(fd,
	555	merge_64(a2, a3), merge_64(a4, a5),
	556	flags);
	557	}
	558
8676d2e0 AN	559	asmlinkage long sys32_fadvise64_64(int fd, int __pad,
	560	unsigned long a2, unsigned long a3,
	561	unsigned long a4, unsigned long a5,
	562	int flags)
	563	{
	564	return sys_fadvise64_64(fd,
	565	merge_64(a2, a3), merge_64(a4, a5),
	566	flags);
	567	}
	568
4dc46775 RB	569	asmlinkage long sys32_fallocate(int fd, int mode, unsigned offset_a2,
	570	unsigned offset_a3, unsigned len_a4, unsigned len_a5)
	571	{
	572	return sys_fallocate(fd, mode, merge_64(offset_a2, offset_a3),
	573	merge_64(len_a4, len_a5));
	574	}
	575
3c37026d	576	save_static_function(sys32_clone);
f5dbeaf5	577	static int noinline __used
3c37026d RB	578	_sys32_clone(nabi_no_regargs struct pt_regs regs)
	579	{
	580	unsigned long clone_flags;
	581	unsigned long newsp;
	582	int __user parent_tidptr, child_tidptr;
	583
	584	clone_flags = regs.regs[4];
	585	newsp = regs.regs[5];
	586	if (!newsp)
	587	newsp = regs.regs[29];
219ac73a	588	parent_tidptr = (int __user *) regs.regs[6];
3c37026d RB	589
	590	/* Use __dummy4 instead of getting it off the stack, so that
	591	syscall() works. */
	592	child_tidptr = (int __user *) __dummy4;
	593	return do_fork(clone_flags, newsp, &regs, 0,
	594	parent_tidptr, child_tidptr);
	595	}