[linux-2.6-block.git] / arch / sparc / kernel / sys_sparc32.c

/* sys_sparc32.c: Conversion between 32bit and 64bit native syscalls.
 *
 * Copyright (C) 1997,1998 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
 * Copyright (C) 1997, 2007 David S. Miller (davem@davemloft.net)
 *
 * These routines maintain argument size conversion between 32bit and 64bit
 * environment.
 */

#include <linux/kernel.h>
#include <linux/sched.h>
#include <linux/capability.h>
#include <linux/fs.h> 
#include <linux/mm.h> 
#include <linux/file.h> 
#include <linux/signal.h>
#include <linux/resource.h>
#include <linux/times.h>
#include <linux/smp.h>
#include <linux/sem.h>
#include <linux/msg.h>
#include <linux/shm.h>
#include <linux/uio.h>
#include <linux/nfs_fs.h>
#include <linux/quota.h>
#include <linux/poll.h>
#include <linux/personality.h>
#include <linux/stat.h>
#include <linux/filter.h>
#include <linux/highmem.h>
#include <linux/highuid.h>
#include <linux/mman.h>
#include <linux/ipv6.h>
#include <linux/in.h>
#include <linux/icmpv6.h>
#include <linux/syscalls.h>
#include <linux/sysctl.h>
#include <linux/binfmts.h>
#include <linux/dnotify.h>
#include <linux/security.h>
#include <linux/compat.h>
#include <linux/vfs.h>
#include <linux/ptrace.h>
#include <linux/slab.h>

#include <asm/types.h>
#include <asm/uaccess.h>
#include <asm/fpumacro.h>
#include <asm/mmu_context.h>
#include <asm/compat_signal.h>

#include "systbls.h"

asmlinkage long sys32_truncate64(const char __user * path, unsigned long high, unsigned long low)
{
	if ((int)high < 0)
		return -EINVAL;
	else
		return sys_truncate(path, (high << 32) | low);
}

asmlinkage long sys32_ftruncate64(unsigned int fd, unsigned long high, unsigned long low)
{
	if ((int)high < 0)
		return -EINVAL;
	else
		return sys_ftruncate(fd, (high << 32) | low);
}

static int cp_compat_stat64(struct kstat *stat,
			    struct compat_stat64 __user *statbuf)
{
	int err;

	err  = put_user(huge_encode_dev(stat->dev), &statbuf->st_dev);
	err |= put_user(stat->ino, &statbuf->st_ino);
	err |= put_user(stat->mode, &statbuf->st_mode);
	err |= put_user(stat->nlink, &statbuf->st_nlink);
	err |= put_user(from_kuid_munged(current_user_ns(), stat->uid), &statbuf->st_uid);
	err |= put_user(from_kgid_munged(current_user_ns(), stat->gid), &statbuf->st_gid);
	err |= put_user(huge_encode_dev(stat->rdev), &statbuf->st_rdev);
	err |= put_user(0, (unsigned long __user *) &statbuf->__pad3[0]);
	err |= put_user(stat->size, &statbuf->st_size);
	err |= put_user(stat->blksize, &statbuf->st_blksize);
	err |= put_user(0, (unsigned int __user *) &statbuf->__pad4[0]);
	err |= put_user(0, (unsigned int __user *) &statbuf->__pad4[4]);
	err |= put_user(stat->blocks, &statbuf->st_blocks);
	err |= put_user(stat->atime.tv_sec, &statbuf->st_atime);
	err |= put_user(stat->atime.tv_nsec, &statbuf->st_atime_nsec);
	err |= put_user(stat->mtime.tv_sec, &statbuf->st_mtime);
	err |= put_user(stat->mtime.tv_nsec, &statbuf->st_mtime_nsec);
	err |= put_user(stat->ctime.tv_sec, &statbuf->st_ctime);
	err |= put_user(stat->ctime.tv_nsec, &statbuf->st_ctime_nsec);
	err |= put_user(0, &statbuf->__unused4);
	err |= put_user(0, &statbuf->__unused5);

	return err;
}

asmlinkage long compat_sys_stat64(const char __user * filename,
		struct compat_stat64 __user *statbuf)
{
	struct kstat stat;
	int error = vfs_stat(filename, &stat);

	if (!error)
		error = cp_compat_stat64(&stat, statbuf);
	return error;
}

asmlinkage long compat_sys_lstat64(const char __user * filename,
		struct compat_stat64 __user *statbuf)
{
	struct kstat stat;
	int error = vfs_lstat(filename, &stat);

	if (!error)
		error = cp_compat_stat64(&stat, statbuf);
	return error;
}

asmlinkage long compat_sys_fstat64(unsigned int fd,
		struct compat_stat64 __user * statbuf)
{
	struct kstat stat;
	int error = vfs_fstat(fd, &stat);

	if (!error)
		error = cp_compat_stat64(&stat, statbuf);
	return error;
}

asmlinkage long compat_sys_fstatat64(unsigned int dfd,
		const char __user *filename,
		struct compat_stat64 __user * statbuf, int flag)
{
	struct kstat stat;
	int error;

	error = vfs_fstatat(dfd, filename, &stat, flag);
	if (error)
		return error;
	return cp_compat_stat64(&stat, statbuf);
}

COMPAT_SYSCALL_DEFINE3(sparc_sigaction, int, sig,
			struct compat_old_sigaction __user *,act,
			struct compat_old_sigaction __user *,oact)
{
	WARN_ON_ONCE(sig >= 0);
	return compat_sys_sigaction(-sig, act, oact);
}

COMPAT_SYSCALL_DEFINE5(rt_sigaction, int, sig,
			struct compat_sigaction __user *,act,
			struct compat_sigaction __user *,oact,
			void __user *,restorer,
			compat_size_t,sigsetsize)
{
        struct k_sigaction new_ka, old_ka;
        int ret;
	compat_sigset_t set32;

        /* XXX: Don't preclude handling different sized sigset_t's.  */
        if (sigsetsize != sizeof(compat_sigset_t))
                return -EINVAL;

        if (act) {
		u32 u_handler, u_restorer;

		new_ka.ka_restorer = restorer;
		ret = get_user(u_handler, &act->sa_handler);
		new_ka.sa.sa_handler =  compat_ptr(u_handler);
		ret |= copy_from_user(&set32, &act->sa_mask, sizeof(compat_sigset_t));
		sigset_from_compat(&new_ka.sa.sa_mask, &set32);
		ret |= get_user(new_ka.sa.sa_flags, &act->sa_flags);
		ret |= get_user(u_restorer, &act->sa_restorer);
		new_ka.sa.sa_restorer = compat_ptr(u_restorer);
                if (ret)
                	return -EFAULT;
	}

	ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);

	if (!ret && oact) {
		sigset_to_compat(&set32, &old_ka.sa.sa_mask);
		ret = put_user(ptr_to_compat(old_ka.sa.sa_handler), &oact->sa_handler);
		ret |= copy_to_user(&oact->sa_mask, &set32, sizeof(compat_sigset_t));
		ret |= put_user(old_ka.sa.sa_flags, &oact->sa_flags);
		ret |= put_user(ptr_to_compat(old_ka.sa.sa_restorer), &oact->sa_restorer);
		if (ret)
			ret = -EFAULT;
        }

        return ret;
}

asmlinkage compat_ssize_t sys32_pread64(unsigned int fd,
					char __user *ubuf,
					compat_size_t count,
					unsigned long poshi,
					unsigned long poslo)
{
	return sys_pread64(fd, ubuf, count, (poshi << 32) | poslo);
}

asmlinkage compat_ssize_t sys32_pwrite64(unsigned int fd,
					 char __user *ubuf,
					 compat_size_t count,
					 unsigned long poshi,
					 unsigned long poslo)
{
	return sys_pwrite64(fd, ubuf, count, (poshi << 32) | poslo);
}

asmlinkage long compat_sys_readahead(int fd,
				     unsigned long offhi,
				     unsigned long offlo,
				     compat_size_t count)
{
	return sys_readahead(fd, (offhi << 32) | offlo, count);
}

long compat_sys_fadvise64(int fd,
			  unsigned long offhi,
			  unsigned long offlo,
			  compat_size_t len, int advice)
{
	return sys_fadvise64_64(fd, (offhi << 32) | offlo, len, advice);
}

long compat_sys_fadvise64_64(int fd,
			     unsigned long offhi, unsigned long offlo,
			     unsigned long lenhi, unsigned long lenlo,
			     int advice)
{
	return sys_fadvise64_64(fd,
				(offhi << 32) | offlo,
				(lenhi << 32) | lenlo,
				advice);
}

long sys32_sync_file_range(unsigned int fd, unsigned long off_high, unsigned long off_low, unsigned long nb_high, unsigned long nb_low, unsigned int flags)
{
	return sys_sync_file_range(fd,
				   (off_high << 32) | off_low,
				   (nb_high << 32) | nb_low,
				   flags);
}

asmlinkage long compat_sys_fallocate(int fd, int mode, u32 offhi, u32 offlo,
				     u32 lenhi, u32 lenlo)
{
	return sys_fallocate(fd, mode, ((loff_t)offhi << 32) | offlo,
			     ((loff_t)lenhi << 32) | lenlo);
}
Commit	Line	Data
bc5a2e64	1	/* sys_sparc32.c: Conversion between 32bit and 64bit native syscalls.
1da177e4 LT	2	*
1da177e4 LT	3	* Copyright (C) 1997,1998 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
bc5a2e64	4	* Copyright (C) 1997, 2007 David S. Miller (davem@davemloft.net)
1da177e4 LT	5	*
	6	* These routines maintain argument size conversion between 32bit and 64bit
	7	* environment.
	8	*/
	9
1da177e4 LT	10	#include <linux/kernel.h>
1da177e4 LT	11	#include <linux/sched.h>
a9415644	12	#include <linux/capability.h>
1da177e4 LT	13	#include <linux/fs.h>
	14	#include <linux/mm.h>
	15	#include <linux/file.h>
	16	#include <linux/signal.h>
	17	#include <linux/resource.h>
	18	#include <linux/times.h>
1da177e4	19	#include <linux/smp.h>
1da177e4 LT	20	#include <linux/sem.h>
	21	#include <linux/msg.h>
	22	#include <linux/shm.h>
1da177e4 LT	23	#include <linux/uio.h>
	24	#include <linux/nfs_fs.h>
	25	#include <linux/quota.h>
1da177e4 LT	26	#include <linux/poll.h>
	27	#include <linux/personality.h>
	28	#include <linux/stat.h>
	29	#include <linux/filter.h>
	30	#include <linux/highmem.h>
	31	#include <linux/highuid.h>
	32	#include <linux/mman.h>
	33	#include <linux/ipv6.h>
	34	#include <linux/in.h>
	35	#include <linux/icmpv6.h>
	36	#include <linux/syscalls.h>
	37	#include <linux/sysctl.h>
	38	#include <linux/binfmts.h>
	39	#include <linux/dnotify.h>
	40	#include <linux/security.h>
	41	#include <linux/compat.h>
	42	#include <linux/vfs.h>
1da177e4	43	#include <linux/ptrace.h>
5a0e3ad6	44	#include <linux/slab.h>
1da177e4 LT	45
1da177e4 LT	46	#include <asm/types.h>
1da177e4 LT	47	#include <asm/uaccess.h>
1da177e4 LT	48	#include <asm/fpumacro.h>
1da177e4	49	#include <asm/mmu_context.h>
14cc6aba	50	#include <asm/compat_signal.h>
1da177e4	51
ed8eb755 SR	52	#include "systbls.h"
ed8eb755 SR	53
1da177e4 LT	54	asmlinkage long sys32_truncate64(const char __user * path, unsigned long high, unsigned long low)
	55	{
	56	if ((int)high < 0)
	57	return -EINVAL;
	58	else
	59	return sys_truncate(path, (high << 32) \| low);
	60	}
	61
	62	asmlinkage long sys32_ftruncate64(unsigned int fd, unsigned long high, unsigned long low)
	63	{
	64	if ((int)high < 0)
	65	return -EINVAL;
	66	else
	67	return sys_ftruncate(fd, (high << 32) \| low);
	68	}
	69
908f5162 AB	70	static int cp_compat_stat64(struct kstat *stat,
908f5162 AB	71	struct compat_stat64 __user *statbuf)
0ba4da03 DM	72	{
	73	int err;
	74
	75	err = put_user(huge_encode_dev(stat->dev), &statbuf->st_dev);
	76	err \|= put_user(stat->ino, &statbuf->st_ino);
	77	err \|= put_user(stat->mode, &statbuf->st_mode);
	78	err \|= put_user(stat->nlink, &statbuf->st_nlink);
a7c1938e EB	79	err \|= put_user(from_kuid_munged(current_user_ns(), stat->uid), &statbuf->st_uid);
a7c1938e EB	80	err \|= put_user(from_kgid_munged(current_user_ns(), stat->gid), &statbuf->st_gid);
0ba4da03 DM	81	err \|= put_user(huge_encode_dev(stat->rdev), &statbuf->st_rdev);
	82	err \|= put_user(0, (unsigned long __user *) &statbuf->__pad3[0]);
	83	err \|= put_user(stat->size, &statbuf->st_size);
	84	err \|= put_user(stat->blksize, &statbuf->st_blksize);
	85	err \|= put_user(0, (unsigned int __user *) &statbuf->__pad4[0]);
	86	err \|= put_user(0, (unsigned int __user *) &statbuf->__pad4[4]);
	87	err \|= put_user(stat->blocks, &statbuf->st_blocks);
	88	err \|= put_user(stat->atime.tv_sec, &statbuf->st_atime);
	89	err \|= put_user(stat->atime.tv_nsec, &statbuf->st_atime_nsec);
	90	err \|= put_user(stat->mtime.tv_sec, &statbuf->st_mtime);
	91	err \|= put_user(stat->mtime.tv_nsec, &statbuf->st_mtime_nsec);
	92	err \|= put_user(stat->ctime.tv_sec, &statbuf->st_ctime);
	93	err \|= put_user(stat->ctime.tv_nsec, &statbuf->st_ctime_nsec);
	94	err \|= put_user(0, &statbuf->__unused4);
	95	err \|= put_user(0, &statbuf->__unused5);
	96
	97	return err;
	98	}
	99
c7887325	100	asmlinkage long compat_sys_stat64(const char __user * filename,
0ba4da03 DM	101	struct compat_stat64 __user *statbuf)
	102	{
	103	struct kstat stat;
	104	int error = vfs_stat(filename, &stat);
	105
	106	if (!error)
	107	error = cp_compat_stat64(&stat, statbuf);
	108	return error;
	109	}
	110
c7887325	111	asmlinkage long compat_sys_lstat64(const char __user * filename,
0ba4da03 DM	112	struct compat_stat64 __user *statbuf)
	113	{
	114	struct kstat stat;
	115	int error = vfs_lstat(filename, &stat);
	116
	117	if (!error)
	118	error = cp_compat_stat64(&stat, statbuf);
	119	return error;
	120	}
	121
	122	asmlinkage long compat_sys_fstat64(unsigned int fd,
	123	struct compat_stat64 __user * statbuf)
	124	{
	125	struct kstat stat;
	126	int error = vfs_fstat(fd, &stat);
	127
	128	if (!error)
	129	error = cp_compat_stat64(&stat, statbuf);
	130	return error;
	131	}
	132
c7887325 DH	133	asmlinkage long compat_sys_fstatat64(unsigned int dfd,
c7887325 DH	134	const char __user *filename,
40ad7a6a DM	135	struct compat_stat64 __user * statbuf, int flag)
	136	{
	137	struct kstat stat;
0112fc22	138	int error;
40ad7a6a	139
0112fc22 OD	140	error = vfs_fstatat(dfd, filename, &stat, flag);
	141	if (error)
	142	return error;
	143	return cp_compat_stat64(&stat, statbuf);
40ad7a6a DM	144	}
40ad7a6a DM	145
a274bd49 AV	146	COMPAT_SYSCALL_DEFINE3(sparc_sigaction, int, sig,
	147	struct compat_old_sigaction __user *,act,
	148	struct compat_old_sigaction __user *,oact)
1da177e4	149	{
5526b7e4	150	WARN_ON_ONCE(sig >= 0);
a274bd49	151	return compat_sys_sigaction(-sig, act, oact);
1da177e4 LT	152	}
1da177e4 LT	153
bdc40abf AV	154	COMPAT_SYSCALL_DEFINE5(rt_sigaction, int, sig,
	155	struct compat_sigaction __user *,act,
	156	struct compat_sigaction __user *,oact,
	157	void __user *,restorer,
	158	compat_size_t,sigsetsize)
1da177e4 LT	159	{
	160	struct k_sigaction new_ka, old_ka;
	161	int ret;
	162	compat_sigset_t set32;
	163
	164	/* XXX: Don't preclude handling different sized sigset_t's. */
	165	if (sigsetsize != sizeof(compat_sigset_t))
	166	return -EINVAL;
	167
1da177e4 LT	168	if (act) {
	169	u32 u_handler, u_restorer;
	170
	171	new_ka.ka_restorer = restorer;
	172	ret = get_user(u_handler, &act->sa_handler);
	173	new_ka.sa.sa_handler = compat_ptr(u_handler);
3ddc5b46	174	ret \|= copy_from_user(&set32, &act->sa_mask, sizeof(compat_sigset_t));
bdc40abf	175	sigset_from_compat(&new_ka.sa.sa_mask, &set32);
3ddc5b46 MD	176	ret \|= get_user(new_ka.sa.sa_flags, &act->sa_flags);
3ddc5b46 MD	177	ret \|= get_user(u_restorer, &act->sa_restorer);
1da177e4 LT	178	new_ka.sa.sa_restorer = compat_ptr(u_restorer);
	179	if (ret)
	180	return -EFAULT;
	181	}
	182
	183	ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);
	184
	185	if (!ret && oact) {
bdc40abf	186	sigset_to_compat(&set32, &old_ka.sa.sa_mask);
1da177e4	187	ret = put_user(ptr_to_compat(old_ka.sa.sa_handler), &oact->sa_handler);
3ddc5b46 MD	188	ret \|= copy_to_user(&oact->sa_mask, &set32, sizeof(compat_sigset_t));
	189	ret \|= put_user(old_ka.sa.sa_flags, &oact->sa_flags);
	190	ret \|= put_user(ptr_to_compat(old_ka.sa.sa_restorer), &oact->sa_restorer);
1da177e4 LT	191	if (ret)
	192	ret = -EFAULT;
	193	}
	194
	195	return ret;
	196	}
	197
1da177e4 LT	198	asmlinkage compat_ssize_t sys32_pread64(unsigned int fd,
	199	char __user *ubuf,
	200	compat_size_t count,
	201	unsigned long poshi,
	202	unsigned long poslo)
	203	{
	204	return sys_pread64(fd, ubuf, count, (poshi << 32) \| poslo);
	205	}
	206
	207	asmlinkage compat_ssize_t sys32_pwrite64(unsigned int fd,
	208	char __user *ubuf,
	209	compat_size_t count,
	210	unsigned long poshi,
	211	unsigned long poslo)
	212	{
	213	return sys_pwrite64(fd, ubuf, count, (poshi << 32) \| poslo);
	214	}
	215
	216	asmlinkage long compat_sys_readahead(int fd,
	217	unsigned long offhi,
	218	unsigned long offlo,
	219	compat_size_t count)
	220	{
	221	return sys_readahead(fd, (offhi << 32) \| offlo, count);
	222	}
	223
	224	long compat_sys_fadvise64(int fd,
	225	unsigned long offhi,
	226	unsigned long offlo,
	227	compat_size_t len, int advice)
	228	{
	229	return sys_fadvise64_64(fd, (offhi << 32) \| offlo, len, advice);
	230	}
	231
	232	long compat_sys_fadvise64_64(int fd,
	233	unsigned long offhi, unsigned long offlo,
	234	unsigned long lenhi, unsigned long lenlo,
	235	int advice)
	236	{
	237	return sys_fadvise64_64(fd,
	238	(offhi << 32) \| offlo,
	239	(lenhi << 32) \| lenlo,
	240	advice);
	241	}
	242
2ae80c43	243	long sys32_sync_file_range(unsigned int fd, unsigned long off_high, unsigned long off_low, unsigned long nb_high, unsigned long nb_low, unsigned int flags)
289eee6f DM	244	{
	245	return sys_sync_file_range(fd,
	246	(off_high << 32) \| off_low,
	247	(nb_high << 32) \| nb_low,
	248	flags);
	249	}
bc5a2e64 DM	250
	251	asmlinkage long compat_sys_fallocate(int fd, int mode, u32 offhi, u32 offlo,
	252	u32 lenhi, u32 lenlo)
	253	{
	254	return sys_fallocate(fd, mode, ((loff_t)offhi << 32) \| offlo,
	255	((loff_t)lenhi << 32) \| lenlo);
	256	}