xref: /openbmc/linux/arch/sparc/kernel/sys_sparc32.c (revision 31b90347)
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 asmlinkage long sys32_truncate64(const char __user * path, unsigned long high, unsigned long low)
53 {
54 	if ((int)high < 0)
55 		return -EINVAL;
56 	else
57 		return sys_truncate(path, (high << 32) | low);
58 }
59 
60 asmlinkage long sys32_ftruncate64(unsigned int fd, unsigned long high, unsigned long low)
61 {
62 	if ((int)high < 0)
63 		return -EINVAL;
64 	else
65 		return sys_ftruncate(fd, (high << 32) | low);
66 }
67 
68 static int cp_compat_stat64(struct kstat *stat,
69 			    struct compat_stat64 __user *statbuf)
70 {
71 	int err;
72 
73 	err  = put_user(huge_encode_dev(stat->dev), &statbuf->st_dev);
74 	err |= put_user(stat->ino, &statbuf->st_ino);
75 	err |= put_user(stat->mode, &statbuf->st_mode);
76 	err |= put_user(stat->nlink, &statbuf->st_nlink);
77 	err |= put_user(from_kuid_munged(current_user_ns(), stat->uid), &statbuf->st_uid);
78 	err |= put_user(from_kgid_munged(current_user_ns(), stat->gid), &statbuf->st_gid);
79 	err |= put_user(huge_encode_dev(stat->rdev), &statbuf->st_rdev);
80 	err |= put_user(0, (unsigned long __user *) &statbuf->__pad3[0]);
81 	err |= put_user(stat->size, &statbuf->st_size);
82 	err |= put_user(stat->blksize, &statbuf->st_blksize);
83 	err |= put_user(0, (unsigned int __user *) &statbuf->__pad4[0]);
84 	err |= put_user(0, (unsigned int __user *) &statbuf->__pad4[4]);
85 	err |= put_user(stat->blocks, &statbuf->st_blocks);
86 	err |= put_user(stat->atime.tv_sec, &statbuf->st_atime);
87 	err |= put_user(stat->atime.tv_nsec, &statbuf->st_atime_nsec);
88 	err |= put_user(stat->mtime.tv_sec, &statbuf->st_mtime);
89 	err |= put_user(stat->mtime.tv_nsec, &statbuf->st_mtime_nsec);
90 	err |= put_user(stat->ctime.tv_sec, &statbuf->st_ctime);
91 	err |= put_user(stat->ctime.tv_nsec, &statbuf->st_ctime_nsec);
92 	err |= put_user(0, &statbuf->__unused4);
93 	err |= put_user(0, &statbuf->__unused5);
94 
95 	return err;
96 }
97 
98 asmlinkage long compat_sys_stat64(const char __user * filename,
99 		struct compat_stat64 __user *statbuf)
100 {
101 	struct kstat stat;
102 	int error = vfs_stat(filename, &stat);
103 
104 	if (!error)
105 		error = cp_compat_stat64(&stat, statbuf);
106 	return error;
107 }
108 
109 asmlinkage long compat_sys_lstat64(const char __user * filename,
110 		struct compat_stat64 __user *statbuf)
111 {
112 	struct kstat stat;
113 	int error = vfs_lstat(filename, &stat);
114 
115 	if (!error)
116 		error = cp_compat_stat64(&stat, statbuf);
117 	return error;
118 }
119 
120 asmlinkage long compat_sys_fstat64(unsigned int fd,
121 		struct compat_stat64 __user * statbuf)
122 {
123 	struct kstat stat;
124 	int error = vfs_fstat(fd, &stat);
125 
126 	if (!error)
127 		error = cp_compat_stat64(&stat, statbuf);
128 	return error;
129 }
130 
131 asmlinkage long compat_sys_fstatat64(unsigned int dfd,
132 		const char __user *filename,
133 		struct compat_stat64 __user * statbuf, int flag)
134 {
135 	struct kstat stat;
136 	int error;
137 
138 	error = vfs_fstatat(dfd, filename, &stat, flag);
139 	if (error)
140 		return error;
141 	return cp_compat_stat64(&stat, statbuf);
142 }
143 
144 COMPAT_SYSCALL_DEFINE3(sparc_sigaction, int, sig,
145 			struct compat_old_sigaction __user *,act,
146 			struct compat_old_sigaction __user *,oact)
147 {
148 	WARN_ON_ONCE(sig >= 0);
149 	return compat_sys_sigaction(-sig, act, oact);
150 }
151 
152 COMPAT_SYSCALL_DEFINE5(rt_sigaction, int, sig,
153 			struct compat_sigaction __user *,act,
154 			struct compat_sigaction __user *,oact,
155 			void __user *,restorer,
156 			compat_size_t,sigsetsize)
157 {
158         struct k_sigaction new_ka, old_ka;
159         int ret;
160 	compat_sigset_t set32;
161 
162         /* XXX: Don't preclude handling different sized sigset_t's.  */
163         if (sigsetsize != sizeof(compat_sigset_t))
164                 return -EINVAL;
165 
166         if (act) {
167 		u32 u_handler, u_restorer;
168 
169 		new_ka.ka_restorer = restorer;
170 		ret = get_user(u_handler, &act->sa_handler);
171 		new_ka.sa.sa_handler =  compat_ptr(u_handler);
172 		ret |= copy_from_user(&set32, &act->sa_mask, sizeof(compat_sigset_t));
173 		sigset_from_compat(&new_ka.sa.sa_mask, &set32);
174 		ret |= get_user(new_ka.sa.sa_flags, &act->sa_flags);
175 		ret |= get_user(u_restorer, &act->sa_restorer);
176 		new_ka.sa.sa_restorer = compat_ptr(u_restorer);
177                 if (ret)
178                 	return -EFAULT;
179 	}
180 
181 	ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);
182 
183 	if (!ret && oact) {
184 		sigset_to_compat(&set32, &old_ka.sa.sa_mask);
185 		ret = put_user(ptr_to_compat(old_ka.sa.sa_handler), &oact->sa_handler);
186 		ret |= copy_to_user(&oact->sa_mask, &set32, sizeof(compat_sigset_t));
187 		ret |= put_user(old_ka.sa.sa_flags, &oact->sa_flags);
188 		ret |= put_user(ptr_to_compat(old_ka.sa.sa_restorer), &oact->sa_restorer);
189 		if (ret)
190 			ret = -EFAULT;
191         }
192 
193         return ret;
194 }
195 
196 asmlinkage compat_ssize_t sys32_pread64(unsigned int fd,
197 					char __user *ubuf,
198 					compat_size_t count,
199 					unsigned long poshi,
200 					unsigned long poslo)
201 {
202 	return sys_pread64(fd, ubuf, count, (poshi << 32) | poslo);
203 }
204 
205 asmlinkage compat_ssize_t sys32_pwrite64(unsigned int fd,
206 					 char __user *ubuf,
207 					 compat_size_t count,
208 					 unsigned long poshi,
209 					 unsigned long poslo)
210 {
211 	return sys_pwrite64(fd, ubuf, count, (poshi << 32) | poslo);
212 }
213 
214 asmlinkage long compat_sys_readahead(int fd,
215 				     unsigned long offhi,
216 				     unsigned long offlo,
217 				     compat_size_t count)
218 {
219 	return sys_readahead(fd, (offhi << 32) | offlo, count);
220 }
221 
222 long compat_sys_fadvise64(int fd,
223 			  unsigned long offhi,
224 			  unsigned long offlo,
225 			  compat_size_t len, int advice)
226 {
227 	return sys_fadvise64_64(fd, (offhi << 32) | offlo, len, advice);
228 }
229 
230 long compat_sys_fadvise64_64(int fd,
231 			     unsigned long offhi, unsigned long offlo,
232 			     unsigned long lenhi, unsigned long lenlo,
233 			     int advice)
234 {
235 	return sys_fadvise64_64(fd,
236 				(offhi << 32) | offlo,
237 				(lenhi << 32) | lenlo,
238 				advice);
239 }
240 
241 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)
242 {
243 	return sys_sync_file_range(fd,
244 				   (off_high << 32) | off_low,
245 				   (nb_high << 32) | nb_low,
246 				   flags);
247 }
248 
249 asmlinkage long compat_sys_fallocate(int fd, int mode, u32 offhi, u32 offlo,
250 				     u32 lenhi, u32 lenlo)
251 {
252 	return sys_fallocate(fd, mode, ((loff_t)offhi << 32) | offlo,
253 			     ((loff_t)lenhi << 32) | lenlo);
254 }
255