[mirror_ubuntu-disco-kernel.git] / arch / sparc / kernel / sys_sparc32.c

// SPDX-License-Identifier: GPL-2.0
/* 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 <linux/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
b2441318	1	// SPDX-License-Identifier: GPL-2.0
bc5a2e64	2	/* sys_sparc32.c: Conversion between 32bit and 64bit native syscalls.
1da177e4 LT	3	*
1da177e4 LT	4	* Copyright (C) 1997,1998 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
bc5a2e64	5	* Copyright (C) 1997, 2007 David S. Miller (davem@davemloft.net)
1da177e4 LT	6	*
	7	* These routines maintain argument size conversion between 32bit and 64bit
	8	* environment.
	9	*/
	10
1da177e4 LT	11	#include <linux/kernel.h>
1da177e4 LT	12	#include <linux/sched.h>
a9415644	13	#include <linux/capability.h>
1da177e4 LT	14	#include <linux/fs.h>
	15	#include <linux/mm.h>
	16	#include <linux/file.h>
	17	#include <linux/signal.h>
	18	#include <linux/resource.h>
	19	#include <linux/times.h>
1da177e4	20	#include <linux/smp.h>
1da177e4 LT	21	#include <linux/sem.h>
	22	#include <linux/msg.h>
	23	#include <linux/shm.h>
1da177e4 LT	24	#include <linux/uio.h>
	25	#include <linux/nfs_fs.h>
	26	#include <linux/quota.h>
1da177e4 LT	27	#include <linux/poll.h>
	28	#include <linux/personality.h>
	29	#include <linux/stat.h>
	30	#include <linux/filter.h>
	31	#include <linux/highmem.h>
	32	#include <linux/highuid.h>
	33	#include <linux/mman.h>
	34	#include <linux/ipv6.h>
	35	#include <linux/in.h>
	36	#include <linux/icmpv6.h>
	37	#include <linux/syscalls.h>
	38	#include <linux/sysctl.h>
	39	#include <linux/binfmts.h>
	40	#include <linux/dnotify.h>
	41	#include <linux/security.h>
	42	#include <linux/compat.h>
	43	#include <linux/vfs.h>
1da177e4	44	#include <linux/ptrace.h>
5a0e3ad6	45	#include <linux/slab.h>
1da177e4 LT	46
1da177e4 LT	47	#include <asm/types.h>
7c0f6ba6	48	#include <linux/uaccess.h>
1da177e4	49	#include <asm/fpumacro.h>
1da177e4	50	#include <asm/mmu_context.h>
14cc6aba	51	#include <asm/compat_signal.h>
1da177e4	52
ed8eb755 SR	53	#include "systbls.h"
ed8eb755 SR	54
1da177e4 LT	55	asmlinkage long sys32_truncate64(const char __user * path, unsigned long high, unsigned long low)
	56	{
	57	if ((int)high < 0)
	58	return -EINVAL;
	59	else
	60	return sys_truncate(path, (high << 32) \| low);
	61	}
	62
	63	asmlinkage long sys32_ftruncate64(unsigned int fd, unsigned long high, unsigned long low)
	64	{
	65	if ((int)high < 0)
	66	return -EINVAL;
	67	else
	68	return sys_ftruncate(fd, (high << 32) \| low);
	69	}
	70
908f5162 AB	71	static int cp_compat_stat64(struct kstat *stat,
908f5162 AB	72	struct compat_stat64 __user *statbuf)
0ba4da03 DM	73	{
	74	int err;
	75
	76	err = put_user(huge_encode_dev(stat->dev), &statbuf->st_dev);
	77	err \|= put_user(stat->ino, &statbuf->st_ino);
	78	err \|= put_user(stat->mode, &statbuf->st_mode);
	79	err \|= put_user(stat->nlink, &statbuf->st_nlink);
a7c1938e EB	80	err \|= put_user(from_kuid_munged(current_user_ns(), stat->uid), &statbuf->st_uid);
a7c1938e EB	81	err \|= put_user(from_kgid_munged(current_user_ns(), stat->gid), &statbuf->st_gid);
0ba4da03 DM	82	err \|= put_user(huge_encode_dev(stat->rdev), &statbuf->st_rdev);
	83	err \|= put_user(0, (unsigned long __user *) &statbuf->__pad3[0]);
	84	err \|= put_user(stat->size, &statbuf->st_size);
	85	err \|= put_user(stat->blksize, &statbuf->st_blksize);
	86	err \|= put_user(0, (unsigned int __user *) &statbuf->__pad4[0]);
	87	err \|= put_user(0, (unsigned int __user *) &statbuf->__pad4[4]);
	88	err \|= put_user(stat->blocks, &statbuf->st_blocks);
	89	err \|= put_user(stat->atime.tv_sec, &statbuf->st_atime);
	90	err \|= put_user(stat->atime.tv_nsec, &statbuf->st_atime_nsec);
	91	err \|= put_user(stat->mtime.tv_sec, &statbuf->st_mtime);
	92	err \|= put_user(stat->mtime.tv_nsec, &statbuf->st_mtime_nsec);
	93	err \|= put_user(stat->ctime.tv_sec, &statbuf->st_ctime);
	94	err \|= put_user(stat->ctime.tv_nsec, &statbuf->st_ctime_nsec);
	95	err \|= put_user(0, &statbuf->__unused4);
	96	err \|= put_user(0, &statbuf->__unused5);
	97
	98	return err;
	99	}
	100
c7887325	101	asmlinkage long compat_sys_stat64(const char __user * filename,
0ba4da03 DM	102	struct compat_stat64 __user *statbuf)
	103	{
	104	struct kstat stat;
	105	int error = vfs_stat(filename, &stat);
	106
	107	if (!error)
	108	error = cp_compat_stat64(&stat, statbuf);
	109	return error;
	110	}
	111
c7887325	112	asmlinkage long compat_sys_lstat64(const char __user * filename,
0ba4da03 DM	113	struct compat_stat64 __user *statbuf)
	114	{
	115	struct kstat stat;
	116	int error = vfs_lstat(filename, &stat);
	117
	118	if (!error)
	119	error = cp_compat_stat64(&stat, statbuf);
	120	return error;
	121	}
	122
	123	asmlinkage long compat_sys_fstat64(unsigned int fd,
	124	struct compat_stat64 __user * statbuf)
	125	{
	126	struct kstat stat;
	127	int error = vfs_fstat(fd, &stat);
	128
	129	if (!error)
	130	error = cp_compat_stat64(&stat, statbuf);
	131	return error;
	132	}
	133
c7887325 DH	134	asmlinkage long compat_sys_fstatat64(unsigned int dfd,
c7887325 DH	135	const char __user *filename,
40ad7a6a DM	136	struct compat_stat64 __user * statbuf, int flag)
	137	{
	138	struct kstat stat;
0112fc22	139	int error;
40ad7a6a	140
0112fc22 OD	141	error = vfs_fstatat(dfd, filename, &stat, flag);
	142	if (error)
	143	return error;
	144	return cp_compat_stat64(&stat, statbuf);
40ad7a6a DM	145	}
40ad7a6a DM	146
a274bd49 AV	147	COMPAT_SYSCALL_DEFINE3(sparc_sigaction, int, sig,
	148	struct compat_old_sigaction __user *,act,
	149	struct compat_old_sigaction __user *,oact)
1da177e4	150	{
5526b7e4	151	WARN_ON_ONCE(sig >= 0);
a274bd49	152	return compat_sys_sigaction(-sig, act, oact);
1da177e4 LT	153	}
1da177e4 LT	154
bdc40abf AV	155	COMPAT_SYSCALL_DEFINE5(rt_sigaction, int, sig,
	156	struct compat_sigaction __user *,act,
	157	struct compat_sigaction __user *,oact,
	158	void __user *,restorer,
	159	compat_size_t,sigsetsize)
1da177e4 LT	160	{
	161	struct k_sigaction new_ka, old_ka;
	162	int ret;
	163	compat_sigset_t set32;
	164
	165	/* XXX: Don't preclude handling different sized sigset_t's. */
	166	if (sigsetsize != sizeof(compat_sigset_t))
	167	return -EINVAL;
	168
1da177e4 LT	169	if (act) {
	170	u32 u_handler, u_restorer;
	171
	172	new_ka.ka_restorer = restorer;
	173	ret = get_user(u_handler, &act->sa_handler);
	174	new_ka.sa.sa_handler = compat_ptr(u_handler);
3ddc5b46	175	ret \|= copy_from_user(&set32, &act->sa_mask, sizeof(compat_sigset_t));
bdc40abf	176	sigset_from_compat(&new_ka.sa.sa_mask, &set32);
3ddc5b46 MD	177	ret \|= get_user(new_ka.sa.sa_flags, &act->sa_flags);
3ddc5b46 MD	178	ret \|= get_user(u_restorer, &act->sa_restorer);
1da177e4 LT	179	new_ka.sa.sa_restorer = compat_ptr(u_restorer);
	180	if (ret)
	181	return -EFAULT;
	182	}
	183
	184	ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);
	185
	186	if (!ret && oact) {
bdc40abf	187	sigset_to_compat(&set32, &old_ka.sa.sa_mask);
1da177e4	188	ret = put_user(ptr_to_compat(old_ka.sa.sa_handler), &oact->sa_handler);
3ddc5b46 MD	189	ret \|= copy_to_user(&oact->sa_mask, &set32, sizeof(compat_sigset_t));
	190	ret \|= put_user(old_ka.sa.sa_flags, &oact->sa_flags);
	191	ret \|= put_user(ptr_to_compat(old_ka.sa.sa_restorer), &oact->sa_restorer);
1da177e4 LT	192	if (ret)
	193	ret = -EFAULT;
	194	}
	195
	196	return ret;
	197	}
	198
1da177e4 LT	199	asmlinkage compat_ssize_t sys32_pread64(unsigned int fd,
	200	char __user *ubuf,
	201	compat_size_t count,
	202	unsigned long poshi,
	203	unsigned long poslo)
	204	{
	205	return sys_pread64(fd, ubuf, count, (poshi << 32) \| poslo);
	206	}
	207
	208	asmlinkage compat_ssize_t sys32_pwrite64(unsigned int fd,
	209	char __user *ubuf,
	210	compat_size_t count,
	211	unsigned long poshi,
	212	unsigned long poslo)
	213	{
	214	return sys_pwrite64(fd, ubuf, count, (poshi << 32) \| poslo);
	215	}
	216
	217	asmlinkage long compat_sys_readahead(int fd,
	218	unsigned long offhi,
	219	unsigned long offlo,
	220	compat_size_t count)
	221	{
	222	return sys_readahead(fd, (offhi << 32) \| offlo, count);
	223	}
	224
	225	long compat_sys_fadvise64(int fd,
	226	unsigned long offhi,
	227	unsigned long offlo,
	228	compat_size_t len, int advice)
	229	{
	230	return sys_fadvise64_64(fd, (offhi << 32) \| offlo, len, advice);
	231	}
	232
	233	long compat_sys_fadvise64_64(int fd,
	234	unsigned long offhi, unsigned long offlo,
	235	unsigned long lenhi, unsigned long lenlo,
	236	int advice)
	237	{
	238	return sys_fadvise64_64(fd,
	239	(offhi << 32) \| offlo,
	240	(lenhi << 32) \| lenlo,
	241	advice);
	242	}
	243
2ae80c43	244	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	245	{
	246	return sys_sync_file_range(fd,
	247	(off_high << 32) \| off_low,
	248	(nb_high << 32) \| nb_low,
	249	flags);
	250	}
bc5a2e64 DM	251
	252	asmlinkage long compat_sys_fallocate(int fd, int mode, u32 offhi, u32 offlo,
	253	u32 lenhi, u32 lenlo)
	254	{
	255	return sys_fallocate(fd, mode, ((loff_t)offhi << 32) \| offlo,
	256	((loff_t)lenhi << 32) \| lenlo);
	257	}