1/* sys_sparc32.c: Conversion between 32bit and 64bit native syscalls.
2 *
3 * Copyright (C) 1997,1998 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
4 * Copyright (C) 1997, 2007 David S. Miller (davem@davemloft.net)
5 *
6 * These routines maintain argument size conversion between 32bit and 64bit
7 * environment.
8 */
9
10#include <linux/kernel.h>
11#include <linux/sched.h>
12#include <linux/capability.h>
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>
19#include <linux/smp.h>
20#include <linux/sem.h>
21#include <linux/msg.h>
22#include <linux/shm.h>
23#include <linux/uio.h>
24#include <linux/nfs_fs.h>
25#include <linux/quota.h>
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>
43#include <linux/ptrace.h>
44#include <linux/slab.h>
45
46#include <asm/types.h>
47#include <asm/uaccess.h>
48#include <asm/fpumacro.h>
49#include <asm/mmu_context.h>
50#include <asm/compat_signal.h>
51
52#include "systbls.h"
53
54asmlinkage 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
62asmlinkage 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
70static int cp_compat_stat64(struct kstat *stat,
71			    struct compat_stat64 __user *statbuf)
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);
79	err |= put_user(from_kuid_munged(current_user_ns(), stat->uid), &statbuf->st_uid);
80	err |= put_user(from_kgid_munged(current_user_ns(), stat->gid), &statbuf->st_gid);
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
100asmlinkage long compat_sys_stat64(const char __user * filename,
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
111asmlinkage long compat_sys_lstat64(const char __user * filename,
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
122asmlinkage 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
133asmlinkage long compat_sys_fstatat64(unsigned int dfd,
134		const char __user *filename,
135		struct compat_stat64 __user * statbuf, int flag)
136{
137	struct kstat stat;
138	int error;
139
140	error = vfs_fstatat(dfd, filename, &stat, flag);
141	if (error)
142		return error;
143	return cp_compat_stat64(&stat, statbuf);
144}
145
146COMPAT_SYSCALL_DEFINE3(sparc_sigaction, int, sig,
147			struct compat_old_sigaction __user *,act,
148			struct compat_old_sigaction __user *,oact)
149{
150	WARN_ON_ONCE(sig >= 0);
151	return compat_sys_sigaction(-sig, act, oact);
152}
153
154COMPAT_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)
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
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);
174		ret |= copy_from_user(&set32, &act->sa_mask, sizeof(compat_sigset_t));
175		sigset_from_compat(&new_ka.sa.sa_mask, &set32);
176		ret |= get_user(new_ka.sa.sa_flags, &act->sa_flags);
177		ret |= get_user(u_restorer, &act->sa_restorer);
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) {
186		sigset_to_compat(&set32, &old_ka.sa.sa_mask);
187		ret = put_user(ptr_to_compat(old_ka.sa.sa_handler), &oact->sa_handler);
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);
191		if (ret)
192			ret = -EFAULT;
193        }
194
195        return ret;
196}
197
198asmlinkage 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
207asmlinkage 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
216asmlinkage 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
224long 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
232long 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
243long 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)
244{
245	return sys_sync_file_range(fd,
246				   (off_high << 32) | off_low,
247				   (nb_high << 32) | nb_low,
248				   flags);
249}
250
251asmlinkage 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}
257