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
sys32_truncate64(const char __user * path,unsigned long high,unsigned long low)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
sys32_ftruncate64(unsigned int fd,unsigned long high,unsigned long low)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
cp_compat_stat64(struct kstat * stat,struct compat_stat64 __user * statbuf)70 static 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
compat_sys_stat64(const char __user * filename,struct compat_stat64 __user * statbuf)100 asmlinkage 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
compat_sys_lstat64(const char __user * filename,struct compat_stat64 __user * statbuf)111 asmlinkage 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
compat_sys_fstat64(unsigned int fd,struct compat_stat64 __user * statbuf)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
compat_sys_fstatat64(unsigned int dfd,const char __user * filename,struct compat_stat64 __user * statbuf,int flag)133 asmlinkage 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
COMPAT_SYSCALL_DEFINE3(sparc_sigaction,int,sig,struct compat_old_sigaction __user *,act,struct compat_old_sigaction __user *,oact)146 COMPAT_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
COMPAT_SYSCALL_DEFINE5(rt_sigaction,int,sig,struct compat_sigaction __user *,act,struct compat_sigaction __user *,oact,void __user *,restorer,compat_size_t,sigsetsize)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)
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
sys32_pread64(unsigned int fd,char __user * ubuf,compat_size_t count,unsigned long poshi,unsigned long poslo)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
sys32_pwrite64(unsigned int fd,char __user * ubuf,compat_size_t count,unsigned long poshi,unsigned long poslo)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
compat_sys_readahead(int fd,unsigned long offhi,unsigned long offlo,compat_size_t count)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
compat_sys_fadvise64(int fd,unsigned long offhi,unsigned long offlo,compat_size_t len,int advice)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
compat_sys_fadvise64_64(int fd,unsigned long offhi,unsigned long offlo,unsigned long lenhi,unsigned long lenlo,int advice)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
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)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)
244 {
245 return sys_sync_file_range(fd,
246 (off_high << 32) | off_low,
247 (nb_high << 32) | nb_low,
248 flags);
249 }
250
compat_sys_fallocate(int fd,int mode,u32 offhi,u32 offlo,u32 lenhi,u32 lenlo)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 }
257