Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * Conversion between 32-bit and 64-bit native system calls. | |
3 | * | |
4 | * Copyright (C) 2000 Silicon Graphics, Inc. | |
5 | * Written by Ulf Carlsson (ulfc@engr.sgi.com) | |
1da177e4 | 6 | */ |
1da177e4 LT |
7 | #include <linux/compiler.h> |
8 | #include <linux/mm.h> | |
9 | #include <linux/errno.h> | |
10 | #include <linux/file.h> | |
1da177e4 | 11 | #include <linux/highuid.h> |
1da177e4 LT |
12 | #include <linux/resource.h> |
13 | #include <linux/highmem.h> | |
14 | #include <linux/time.h> | |
15 | #include <linux/times.h> | |
16 | #include <linux/poll.h> | |
1da177e4 LT |
17 | #include <linux/skbuff.h> |
18 | #include <linux/filter.h> | |
19 | #include <linux/shm.h> | |
20 | #include <linux/sem.h> | |
21 | #include <linux/msg.h> | |
22 | #include <linux/icmpv6.h> | |
23 | #include <linux/syscalls.h> | |
24 | #include <linux/sysctl.h> | |
25 | #include <linux/utime.h> | |
26 | #include <linux/utsname.h> | |
27 | #include <linux/personality.h> | |
1da177e4 LT |
28 | #include <linux/dnotify.h> |
29 | #include <linux/module.h> | |
30 | #include <linux/binfmts.h> | |
31 | #include <linux/security.h> | |
32 | #include <linux/compat.h> | |
33 | #include <linux/vfs.h> | |
cba4fbbf | 34 | #include <linux/ipc.h> |
5a0e3ad6 | 35 | #include <linux/slab.h> |
1da177e4 LT |
36 | |
37 | #include <net/sock.h> | |
38 | #include <net/scm.h> | |
39 | ||
431dc804 | 40 | #include <asm/compat-signal.h> |
1da177e4 LT |
41 | #include <asm/sim.h> |
42 | #include <asm/uaccess.h> | |
43 | #include <asm/mmu_context.h> | |
44 | #include <asm/mman.h> | |
45 | ||
46 | /* Use this to get at 32-bit user passed pointers. */ | |
47 | /* A() macro should be used for places where you e.g. | |
48 | have some internal variable u32 and just want to get | |
49 | rid of a compiler warning. AA() has to be used in | |
50 | places where you want to convert a function argument | |
51 | to 32bit pointer or when you e.g. access pt_regs | |
52 | structure and want to consider 32bit registers only. | |
53 | */ | |
54 | #define A(__x) ((unsigned long)(__x)) | |
55 | #define AA(__x) ((unsigned long)((int)__x)) | |
56 | ||
57 | #ifdef __MIPSEB__ | |
21a151d8 | 58 | #define merge_64(r1, r2) ((((r1) & 0xffffffffUL) << 32) + ((r2) & 0xffffffffUL)) |
1da177e4 LT |
59 | #endif |
60 | #ifdef __MIPSEL__ | |
21a151d8 | 61 | #define merge_64(r1, r2) ((((r2) & 0xffffffffUL) << 32) + ((r1) & 0xffffffffUL)) |
1da177e4 LT |
62 | #endif |
63 | ||
dbda6ac0 RB |
64 | SYSCALL_DEFINE6(32_mmap2, unsigned long, addr, unsigned long, len, |
65 | unsigned long, prot, unsigned long, flags, unsigned long, fd, | |
66 | unsigned long, pgoff) | |
1da177e4 | 67 | { |
1da177e4 LT |
68 | unsigned long error; |
69 | ||
70 | error = -EINVAL; | |
947df17c PA |
71 | if (pgoff & (~PAGE_MASK >> 12)) |
72 | goto out; | |
f8b72560 AV |
73 | error = sys_mmap_pgoff(addr, len, prot, flags, fd, |
74 | pgoff >> (PAGE_SHIFT-12)); | |
1da177e4 LT |
75 | out: |
76 | return error; | |
77 | } | |
78 | ||
1da177e4 LT |
79 | #define RLIM_INFINITY32 0x7fffffff |
80 | #define RESOURCE32(x) ((x > RLIM_INFINITY32) ? RLIM_INFINITY32 : x) | |
81 | ||
82 | struct rlimit32 { | |
83 | int rlim_cur; | |
84 | int rlim_max; | |
85 | }; | |
86 | ||
dbda6ac0 RB |
87 | SYSCALL_DEFINE4(32_truncate64, const char __user *, path, |
88 | unsigned long, __dummy, unsigned long, a2, unsigned long, a3) | |
1da177e4 | 89 | { |
d4e9cffa | 90 | return sys_truncate(path, merge_64(a2, a3)); |
1da177e4 LT |
91 | } |
92 | ||
dbda6ac0 RB |
93 | SYSCALL_DEFINE4(32_ftruncate64, unsigned long, fd, unsigned long, __dummy, |
94 | unsigned long, a2, unsigned long, a3) | |
1da177e4 | 95 | { |
d4e9cffa | 96 | return sys_ftruncate(fd, merge_64(a2, a3)); |
1da177e4 LT |
97 | } |
98 | ||
d6c178e9 RB |
99 | SYSCALL_DEFINE5(32_llseek, unsigned int, fd, unsigned int, offset_high, |
100 | unsigned int, offset_low, loff_t __user *, result, | |
101 | unsigned int, origin) | |
1da177e4 LT |
102 | { |
103 | return sys_llseek(fd, offset_high, offset_low, result, origin); | |
104 | } | |
105 | ||
106 | /* From the Single Unix Spec: pread & pwrite act like lseek to pos + op + | |
107 | lseek back to original location. They fail just like lseek does on | |
108 | non-seekable files. */ | |
109 | ||
dbda6ac0 RB |
110 | SYSCALL_DEFINE6(32_pread, unsigned long, fd, char __user *, buf, size_t, count, |
111 | unsigned long, unused, unsigned long, a4, unsigned long, a5) | |
1da177e4 | 112 | { |
6ad0013b | 113 | return sys_pread64(fd, buf, count, merge_64(a4, a5)); |
1da177e4 LT |
114 | } |
115 | ||
dbda6ac0 RB |
116 | SYSCALL_DEFINE6(32_pwrite, unsigned int, fd, const char __user *, buf, |
117 | size_t, count, u32, unused, u64, a4, u64, a5) | |
1da177e4 | 118 | { |
6ad0013b | 119 | return sys_pwrite64(fd, buf, count, merge_64(a4, a5)); |
1da177e4 LT |
120 | } |
121 | ||
dbda6ac0 RB |
122 | SYSCALL_DEFINE2(32_sched_rr_get_interval, compat_pid_t, pid, |
123 | struct compat_timespec __user *, interval) | |
1da177e4 LT |
124 | { |
125 | struct timespec t; | |
126 | int ret; | |
49a89efb | 127 | mm_segment_t old_fs = get_fs(); |
1da177e4 | 128 | |
49a89efb | 129 | set_fs(KERNEL_DS); |
219ac73a | 130 | ret = sys_sched_rr_get_interval(pid, (struct timespec __user *)&t); |
49a89efb | 131 | set_fs(old_fs); |
1da177e4 | 132 | if (put_user (t.tv_sec, &interval->tv_sec) || |
49a89efb | 133 | __put_user(t.tv_nsec, &interval->tv_nsec)) |
1da177e4 LT |
134 | return -EFAULT; |
135 | return ret; | |
136 | } | |
137 | ||
65f8ebe0 RB |
138 | #ifdef CONFIG_SYSVIPC |
139 | ||
dbda6ac0 RB |
140 | SYSCALL_DEFINE6(32_ipc, u32, call, long, first, long, second, long, third, |
141 | unsigned long, ptr, unsigned long, fifth) | |
1da177e4 LT |
142 | { |
143 | int version, err; | |
144 | ||
145 | version = call >> 16; /* hack for backward compatibility */ | |
146 | call &= 0xffff; | |
147 | ||
148 | switch (call) { | |
149 | case SEMOP: | |
150 | /* struct sembuf is the same on 32 and 64bit :)) */ | |
05e43966 | 151 | err = sys_semtimedop(first, compat_ptr(ptr), second, NULL); |
1da177e4 LT |
152 | break; |
153 | case SEMTIMEDOP: | |
05e43966 AN |
154 | err = compat_sys_semtimedop(first, compat_ptr(ptr), second, |
155 | compat_ptr(fifth)); | |
1da177e4 LT |
156 | break; |
157 | case SEMGET: | |
05e43966 | 158 | err = sys_semget(first, second, third); |
1da177e4 LT |
159 | break; |
160 | case SEMCTL: | |
05e43966 | 161 | err = compat_sys_semctl(first, second, third, compat_ptr(ptr)); |
1da177e4 | 162 | break; |
1da177e4 | 163 | case MSGSND: |
05e43966 | 164 | err = compat_sys_msgsnd(first, second, third, compat_ptr(ptr)); |
1da177e4 LT |
165 | break; |
166 | case MSGRCV: | |
05e43966 AN |
167 | err = compat_sys_msgrcv(first, second, fifth, third, |
168 | version, compat_ptr(ptr)); | |
1da177e4 LT |
169 | break; |
170 | case MSGGET: | |
05e43966 | 171 | err = sys_msgget((key_t) first, second); |
1da177e4 LT |
172 | break; |
173 | case MSGCTL: | |
05e43966 | 174 | err = compat_sys_msgctl(first, second, compat_ptr(ptr)); |
1da177e4 | 175 | break; |
1da177e4 | 176 | case SHMAT: |
05e43966 AN |
177 | err = compat_sys_shmat(first, second, third, version, |
178 | compat_ptr(ptr)); | |
1da177e4 LT |
179 | break; |
180 | case SHMDT: | |
05e43966 | 181 | err = sys_shmdt(compat_ptr(ptr)); |
1da177e4 LT |
182 | break; |
183 | case SHMGET: | |
05e43966 | 184 | err = sys_shmget(first, (unsigned)second, third); |
1da177e4 LT |
185 | break; |
186 | case SHMCTL: | |
05e43966 | 187 | err = compat_sys_shmctl(first, second, compat_ptr(ptr)); |
1da177e4 LT |
188 | break; |
189 | default: | |
190 | err = -EINVAL; | |
191 | break; | |
192 | } | |
193 | ||
194 | return err; | |
195 | } | |
196 | ||
65f8ebe0 RB |
197 | #else |
198 | ||
dbda6ac0 | 199 | SYSCALL_DEFINE6(32_ipc, u32, call, int, first, int, second, int, third, |
c189846e | 200 | u32, ptr, u32, fifth) |
65f8ebe0 RB |
201 | { |
202 | return -ENOSYS; | |
203 | } | |
204 | ||
205 | #endif /* CONFIG_SYSVIPC */ | |
206 | ||
05e43966 | 207 | #ifdef CONFIG_MIPS32_N32 |
dbda6ac0 | 208 | SYSCALL_DEFINE4(n32_semctl, int, semid, int, semnum, int, cmd, u32, arg) |
1da177e4 | 209 | { |
05e43966 AN |
210 | /* compat_sys_semctl expects a pointer to union semun */ |
211 | u32 __user *uptr = compat_alloc_user_space(sizeof(u32)); | |
e16d8df0 | 212 | if (put_user(arg, uptr)) |
05e43966 AN |
213 | return -EFAULT; |
214 | return compat_sys_semctl(semid, semnum, cmd, uptr); | |
1da177e4 | 215 | } |
e16d8df0 | 216 | |
dbda6ac0 RB |
217 | SYSCALL_DEFINE4(n32_msgsnd, int, msqid, u32, msgp, unsigned int, msgsz, |
218 | int, msgflg) | |
e16d8df0 AN |
219 | { |
220 | return compat_sys_msgsnd(msqid, msgsz, msgflg, compat_ptr(msgp)); | |
221 | } | |
222 | ||
dbda6ac0 RB |
223 | SYSCALL_DEFINE5(n32_msgrcv, int, msqid, u32, msgp, size_t, msgsz, |
224 | int, msgtyp, int, msgflg) | |
e16d8df0 AN |
225 | { |
226 | return compat_sys_msgrcv(msqid, msgsz, msgtyp, msgflg, IPC_64, | |
227 | compat_ptr(msgp)); | |
228 | } | |
05e43966 | 229 | #endif |
1da177e4 | 230 | |
dbda6ac0 | 231 | SYSCALL_DEFINE1(32_personality, unsigned long, personality) |
1da177e4 | 232 | { |
d62c9ced | 233 | unsigned int p = personality & 0xffffffff; |
1da177e4 | 234 | int ret; |
d62c9ced | 235 | |
53571ce4 | 236 | if (personality(current->personality) == PER_LINUX32 && |
d62c9ced DD |
237 | personality(p) == PER_LINUX) |
238 | p = (p & ~PER_MASK) | PER_LINUX32; | |
239 | ret = sys_personality(p); | |
240 | if (ret != -1 && personality(ret) == PER_LINUX32) | |
241 | ret = (ret & ~PER_MASK) | PER_LINUX; | |
1da177e4 LT |
242 | return ret; |
243 | } | |
244 | ||
dbda6ac0 RB |
245 | SYSCALL_DEFINE4(32_sendfile, long, out_fd, long, in_fd, |
246 | compat_off_t __user *, offset, s32, count) | |
1da177e4 LT |
247 | { |
248 | mm_segment_t old_fs = get_fs(); | |
249 | int ret; | |
250 | off_t of; | |
42a3b4f2 | 251 | |
1da177e4 LT |
252 | if (offset && get_user(of, offset)) |
253 | return -EFAULT; | |
42a3b4f2 | 254 | |
1da177e4 | 255 | set_fs(KERNEL_DS); |
219ac73a | 256 | ret = sys_sendfile(out_fd, in_fd, offset ? (off_t __user *)&of : NULL, count); |
1da177e4 | 257 | set_fs(old_fs); |
42a3b4f2 | 258 | |
1da177e4 LT |
259 | if (offset && put_user(of, offset)) |
260 | return -EFAULT; | |
42a3b4f2 | 261 | |
1da177e4 LT |
262 | return ret; |
263 | } | |
264 | ||
265 | asmlinkage ssize_t sys32_readahead(int fd, u32 pad0, u64 a2, u64 a3, | |
266 | size_t count) | |
267 | { | |
268 | return sys_readahead(fd, merge_64(a2, a3), count); | |
269 | } | |
270 | ||
a8d587a7 RB |
271 | asmlinkage long sys32_sync_file_range(int fd, int __pad, |
272 | unsigned long a2, unsigned long a3, | |
273 | unsigned long a4, unsigned long a5, | |
274 | int flags) | |
275 | { | |
276 | return sys_sync_file_range(fd, | |
277 | merge_64(a2, a3), merge_64(a4, a5), | |
278 | flags); | |
279 | } | |
280 | ||
8676d2e0 AN |
281 | asmlinkage long sys32_fadvise64_64(int fd, int __pad, |
282 | unsigned long a2, unsigned long a3, | |
283 | unsigned long a4, unsigned long a5, | |
284 | int flags) | |
285 | { | |
286 | return sys_fadvise64_64(fd, | |
287 | merge_64(a2, a3), merge_64(a4, a5), | |
288 | flags); | |
289 | } | |
290 | ||
4dc46775 RB |
291 | asmlinkage long sys32_fallocate(int fd, int mode, unsigned offset_a2, |
292 | unsigned offset_a3, unsigned len_a4, unsigned len_a5) | |
293 | { | |
294 | return sys_fallocate(fd, mode, merge_64(offset_a2, offset_a3), | |
295 | merge_64(len_a4, len_a5)); | |
296 | } | |
297 | ||
3c37026d | 298 | save_static_function(sys32_clone); |
f5dbeaf5 | 299 | static int noinline __used |
3c37026d RB |
300 | _sys32_clone(nabi_no_regargs struct pt_regs regs) |
301 | { | |
302 | unsigned long clone_flags; | |
303 | unsigned long newsp; | |
304 | int __user *parent_tidptr, *child_tidptr; | |
305 | ||
306 | clone_flags = regs.regs[4]; | |
307 | newsp = regs.regs[5]; | |
308 | if (!newsp) | |
309 | newsp = regs.regs[29]; | |
219ac73a | 310 | parent_tidptr = (int __user *) regs.regs[6]; |
3c37026d RB |
311 | |
312 | /* Use __dummy4 instead of getting it off the stack, so that | |
313 | syscall() works. */ | |
314 | child_tidptr = (int __user *) __dummy4; | |
e80d6661 | 315 | return do_fork(clone_flags, newsp, 0, |
3c37026d RB |
316 | parent_tidptr, child_tidptr); |
317 | } | |
80b8585b WZ |
318 | |
319 | asmlinkage long sys32_lookup_dcookie(u32 a0, u32 a1, char __user *buf, | |
320 | size_t len) | |
321 | { | |
322 | return sys_lookup_dcookie(merge_64(a0, a1), buf, len); | |
323 | } | |
5e844b31 DD |
324 | |
325 | SYSCALL_DEFINE6(32_fanotify_mark, int, fanotify_fd, unsigned int, flags, | |
326 | u64, a3, u64, a4, int, dfd, const char __user *, pathname) | |
327 | { | |
328 | return sys_fanotify_mark(fanotify_fd, flags, merge_64(a3, a4), | |
329 | dfd, pathname); | |
330 | } | |
1eec6cd0 YZ |
331 | |
332 | SYSCALL_DEFINE6(32_futex, u32 __user *, uaddr, int, op, u32, val, | |
333 | struct compat_timespec __user *, utime, u32 __user *, uaddr2, | |
334 | u32, val3) | |
335 | { | |
336 | return compat_sys_futex(uaddr, op, val, utime, uaddr2, val3); | |
337 | } |