1 // SPDX-License-Identifier: GPL-2.0
2 /* sys_sparc32.c: Conversion between 32bit and 64bit native syscalls.
3 *
4 * Copyright (C) 1997,1998 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
5 * Copyright (C) 1997, 2007 David S. Miller (davem@davemloft.net)
6 *
7 * These routines maintain argument size conversion between 32bit and 64bit
8 * environment.
9 */
10
11 #include <linux/kernel.h>
12 #include <linux/sched.h>
13 #include <linux/capability.h>
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>
20 #include <linux/smp.h>
21 #include <linux/sem.h>
22 #include <linux/msg.h>
23 #include <linux/shm.h>
24 #include <linux/uio.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 <linux/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
COMPAT_SYSCALL_DEFINE3(truncate64,const char __user *,path,u32,high,u32,low)54 COMPAT_SYSCALL_DEFINE3(truncate64, const char __user *, path, u32, high, u32, low)
55 {
56 return ksys_truncate(path, ((u64)high << 32) | low);
57 }
58
COMPAT_SYSCALL_DEFINE3(ftruncate64,unsigned int,fd,u32,high,u32,low)59 COMPAT_SYSCALL_DEFINE3(ftruncate64, unsigned int, fd, u32, high, u32, low)
60 {
61 return ksys_ftruncate(fd, ((u64)high << 32) | low);
62 }
63
cp_compat_stat64(struct kstat * stat,struct compat_stat64 __user * statbuf)64 static int cp_compat_stat64(struct kstat *stat,
65 struct compat_stat64 __user *statbuf)
66 {
67 int err;
68
69 err = put_user(huge_encode_dev(stat->dev), &statbuf->st_dev);
70 err |= put_user(stat->ino, &statbuf->st_ino);
71 err |= put_user(stat->mode, &statbuf->st_mode);
72 err |= put_user(stat->nlink, &statbuf->st_nlink);
73 err |= put_user(from_kuid_munged(current_user_ns(), stat->uid), &statbuf->st_uid);
74 err |= put_user(from_kgid_munged(current_user_ns(), stat->gid), &statbuf->st_gid);
75 err |= put_user(huge_encode_dev(stat->rdev), &statbuf->st_rdev);
76 err |= put_user(0, (unsigned long __user *) &statbuf->__pad3[0]);
77 err |= put_user(stat->size, &statbuf->st_size);
78 err |= put_user(stat->blksize, &statbuf->st_blksize);
79 err |= put_user(0, (unsigned int __user *) &statbuf->__pad4[0]);
80 err |= put_user(0, (unsigned int __user *) &statbuf->__pad4[4]);
81 err |= put_user(stat->blocks, &statbuf->st_blocks);
82 err |= put_user(stat->atime.tv_sec, &statbuf->st_atime);
83 err |= put_user(stat->atime.tv_nsec, &statbuf->st_atime_nsec);
84 err |= put_user(stat->mtime.tv_sec, &statbuf->st_mtime);
85 err |= put_user(stat->mtime.tv_nsec, &statbuf->st_mtime_nsec);
86 err |= put_user(stat->ctime.tv_sec, &statbuf->st_ctime);
87 err |= put_user(stat->ctime.tv_nsec, &statbuf->st_ctime_nsec);
88 err |= put_user(0, &statbuf->__unused4);
89 err |= put_user(0, &statbuf->__unused5);
90
91 return err;
92 }
93
COMPAT_SYSCALL_DEFINE2(stat64,const char __user *,filename,struct compat_stat64 __user *,statbuf)94 COMPAT_SYSCALL_DEFINE2(stat64, const char __user *, filename,
95 struct compat_stat64 __user *, statbuf)
96 {
97 struct kstat stat;
98 int error = vfs_stat(filename, &stat);
99
100 if (!error)
101 error = cp_compat_stat64(&stat, statbuf);
102 return error;
103 }
104
COMPAT_SYSCALL_DEFINE2(lstat64,const char __user *,filename,struct compat_stat64 __user *,statbuf)105 COMPAT_SYSCALL_DEFINE2(lstat64, const char __user *, filename,
106 struct compat_stat64 __user *, statbuf)
107 {
108 struct kstat stat;
109 int error = vfs_lstat(filename, &stat);
110
111 if (!error)
112 error = cp_compat_stat64(&stat, statbuf);
113 return error;
114 }
115
COMPAT_SYSCALL_DEFINE2(fstat64,unsigned int,fd,struct compat_stat64 __user *,statbuf)116 COMPAT_SYSCALL_DEFINE2(fstat64, unsigned int, fd,
117 struct compat_stat64 __user *, statbuf)
118 {
119 struct kstat stat;
120 int error = vfs_fstat(fd, &stat);
121
122 if (!error)
123 error = cp_compat_stat64(&stat, statbuf);
124 return error;
125 }
126
COMPAT_SYSCALL_DEFINE4(fstatat64,unsigned int,dfd,const char __user *,filename,struct compat_stat64 __user *,statbuf,int,flag)127 COMPAT_SYSCALL_DEFINE4(fstatat64, unsigned int, dfd,
128 const char __user *, filename,
129 struct compat_stat64 __user *, statbuf, int, flag)
130 {
131 struct kstat stat;
132 int error;
133
134 error = vfs_fstatat(dfd, filename, &stat, flag);
135 if (error)
136 return error;
137 return cp_compat_stat64(&stat, statbuf);
138 }
139
COMPAT_SYSCALL_DEFINE3(sparc_sigaction,int,sig,struct compat_old_sigaction __user *,act,struct compat_old_sigaction __user *,oact)140 COMPAT_SYSCALL_DEFINE3(sparc_sigaction, int, sig,
141 struct compat_old_sigaction __user *,act,
142 struct compat_old_sigaction __user *,oact)
143 {
144 WARN_ON_ONCE(sig >= 0);
145 return compat_sys_sigaction(-sig, act, oact);
146 }
147
COMPAT_SYSCALL_DEFINE5(rt_sigaction,int,sig,struct compat_sigaction __user *,act,struct compat_sigaction __user *,oact,void __user *,restorer,compat_size_t,sigsetsize)148 COMPAT_SYSCALL_DEFINE5(rt_sigaction, int, sig,
149 struct compat_sigaction __user *,act,
150 struct compat_sigaction __user *,oact,
151 void __user *,restorer,
152 compat_size_t,sigsetsize)
153 {
154 struct k_sigaction new_ka, old_ka;
155 int ret;
156
157 /* XXX: Don't preclude handling different sized sigset_t's. */
158 if (sigsetsize != sizeof(compat_sigset_t))
159 return -EINVAL;
160
161 if (act) {
162 u32 u_handler, u_restorer;
163
164 new_ka.ka_restorer = restorer;
165 ret = get_user(u_handler, &act->sa_handler);
166 new_ka.sa.sa_handler = compat_ptr(u_handler);
167 ret |= get_compat_sigset(&new_ka.sa.sa_mask, &act->sa_mask);
168 ret |= get_user(new_ka.sa.sa_flags, &act->sa_flags);
169 ret |= get_user(u_restorer, &act->sa_restorer);
170 new_ka.sa.sa_restorer = compat_ptr(u_restorer);
171 if (ret)
172 return -EFAULT;
173 }
174
175 ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);
176
177 if (!ret && oact) {
178 ret = put_user(ptr_to_compat(old_ka.sa.sa_handler), &oact->sa_handler);
179 ret |= put_compat_sigset(&oact->sa_mask, &old_ka.sa.sa_mask,
180 sizeof(oact->sa_mask));
181 ret |= put_user(old_ka.sa.sa_flags, &oact->sa_flags);
182 ret |= put_user(ptr_to_compat(old_ka.sa.sa_restorer), &oact->sa_restorer);
183 if (ret)
184 ret = -EFAULT;
185 }
186
187 return ret;
188 }
189
COMPAT_SYSCALL_DEFINE5(pread64,unsigned int,fd,char __user *,ubuf,compat_size_t,count,u32,poshi,u32,poslo)190 COMPAT_SYSCALL_DEFINE5(pread64, unsigned int, fd, char __user *, ubuf,
191 compat_size_t, count, u32, poshi, u32, poslo)
192 {
193 return ksys_pread64(fd, ubuf, count, ((u64)poshi << 32) | poslo);
194 }
195
COMPAT_SYSCALL_DEFINE5(pwrite64,unsigned int,fd,char __user *,ubuf,compat_size_t,count,u32,poshi,u32,poslo)196 COMPAT_SYSCALL_DEFINE5(pwrite64, unsigned int, fd, char __user *, ubuf,
197 compat_size_t, count, u32, poshi, u32, poslo)
198 {
199 return ksys_pwrite64(fd, ubuf, count, ((u64)poshi << 32) | poslo);
200 }
201
COMPAT_SYSCALL_DEFINE4(readahead,int,fd,u32,offhi,u32,offlo,compat_size_t,count)202 COMPAT_SYSCALL_DEFINE4(readahead, int, fd, u32, offhi, u32, offlo,
203 compat_size_t, count)
204 {
205 return ksys_readahead(fd, ((u64)offhi << 32) | offlo, count);
206 }
207
COMPAT_SYSCALL_DEFINE5(fadvise64,int,fd,u32,offhi,u32,offlo,compat_size_t,len,int,advice)208 COMPAT_SYSCALL_DEFINE5(fadvise64, int, fd, u32, offhi, u32, offlo,
209 compat_size_t, len, int, advice)
210 {
211 return ksys_fadvise64_64(fd, ((u64)offhi << 32) | offlo, len, advice);
212 }
213
COMPAT_SYSCALL_DEFINE6(fadvise64_64,int,fd,u32,offhi,u32,offlo,u32,lenhi,u32,lenlo,int,advice)214 COMPAT_SYSCALL_DEFINE6(fadvise64_64, int, fd, u32, offhi, u32, offlo,
215 u32, lenhi, u32, lenlo, int, advice)
216 {
217 return ksys_fadvise64_64(fd,
218 ((u64)offhi << 32) | offlo,
219 ((u64)lenhi << 32) | lenlo,
220 advice);
221 }
222
COMPAT_SYSCALL_DEFINE6(sync_file_range,unsigned int,fd,u32,off_high,u32,off_low,u32,nb_high,u32,nb_low,unsigned int,flags)223 COMPAT_SYSCALL_DEFINE6(sync_file_range, unsigned int, fd, u32, off_high, u32, off_low,
224 u32, nb_high, u32, nb_low, unsigned int, flags)
225 {
226 return ksys_sync_file_range(fd,
227 ((u64)off_high << 32) | off_low,
228 ((u64)nb_high << 32) | nb_low,
229 flags);
230 }
231
COMPAT_SYSCALL_DEFINE6(fallocate,int,fd,int,mode,u32,offhi,u32,offlo,u32,lenhi,u32,lenlo)232 COMPAT_SYSCALL_DEFINE6(fallocate, int, fd, int, mode, u32, offhi, u32, offlo,
233 u32, lenhi, u32, lenlo)
234 {
235 return ksys_fallocate(fd, mode, ((loff_t)offhi << 32) | offlo,
236 ((loff_t)lenhi << 32) | lenlo);
237 }
238