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) | |
6 | * sys32_execve from ia64/ia32 code, Feb 2000, Kanoj Sarcar (kanoj@sgi.com) | |
7 | */ | |
1da177e4 LT |
8 | #include <linux/compiler.h> |
9 | #include <linux/mm.h> | |
10 | #include <linux/errno.h> | |
11 | #include <linux/file.h> | |
12 | #include <linux/smp_lock.h> | |
13 | #include <linux/highuid.h> | |
1da177e4 LT |
14 | #include <linux/resource.h> |
15 | #include <linux/highmem.h> | |
16 | #include <linux/time.h> | |
17 | #include <linux/times.h> | |
18 | #include <linux/poll.h> | |
19 | #include <linux/slab.h> | |
20 | #include <linux/skbuff.h> | |
21 | #include <linux/filter.h> | |
22 | #include <linux/shm.h> | |
23 | #include <linux/sem.h> | |
24 | #include <linux/msg.h> | |
25 | #include <linux/icmpv6.h> | |
26 | #include <linux/syscalls.h> | |
27 | #include <linux/sysctl.h> | |
28 | #include <linux/utime.h> | |
29 | #include <linux/utsname.h> | |
30 | #include <linux/personality.h> | |
1da177e4 LT |
31 | #include <linux/dnotify.h> |
32 | #include <linux/module.h> | |
33 | #include <linux/binfmts.h> | |
34 | #include <linux/security.h> | |
35 | #include <linux/compat.h> | |
36 | #include <linux/vfs.h> | |
cba4fbbf | 37 | #include <linux/ipc.h> |
1da177e4 LT |
38 | |
39 | #include <net/sock.h> | |
40 | #include <net/scm.h> | |
41 | ||
431dc804 | 42 | #include <asm/compat-signal.h> |
1da177e4 LT |
43 | #include <asm/sim.h> |
44 | #include <asm/uaccess.h> | |
45 | #include <asm/mmu_context.h> | |
46 | #include <asm/mman.h> | |
47 | ||
48 | /* Use this to get at 32-bit user passed pointers. */ | |
49 | /* A() macro should be used for places where you e.g. | |
50 | have some internal variable u32 and just want to get | |
51 | rid of a compiler warning. AA() has to be used in | |
52 | places where you want to convert a function argument | |
53 | to 32bit pointer or when you e.g. access pt_regs | |
54 | structure and want to consider 32bit registers only. | |
55 | */ | |
56 | #define A(__x) ((unsigned long)(__x)) | |
57 | #define AA(__x) ((unsigned long)((int)__x)) | |
58 | ||
59 | #ifdef __MIPSEB__ | |
21a151d8 | 60 | #define merge_64(r1, r2) ((((r1) & 0xffffffffUL) << 32) + ((r2) & 0xffffffffUL)) |
1da177e4 LT |
61 | #endif |
62 | #ifdef __MIPSEL__ | |
21a151d8 | 63 | #define merge_64(r1, r2) ((((r2) & 0xffffffffUL) << 32) + ((r1) & 0xffffffffUL)) |
1da177e4 LT |
64 | #endif |
65 | ||
dbda6ac0 RB |
66 | SYSCALL_DEFINE6(32_mmap2, unsigned long, addr, unsigned long, len, |
67 | unsigned long, prot, unsigned long, flags, unsigned long, fd, | |
68 | unsigned long, pgoff) | |
1da177e4 LT |
69 | { |
70 | struct file * file = NULL; | |
71 | unsigned long error; | |
72 | ||
73 | error = -EINVAL; | |
947df17c PA |
74 | if (pgoff & (~PAGE_MASK >> 12)) |
75 | goto out; | |
76 | pgoff >>= PAGE_SHIFT-12; | |
77 | ||
1da177e4 LT |
78 | if (!(flags & MAP_ANONYMOUS)) { |
79 | error = -EBADF; | |
80 | file = fget(fd); | |
81 | if (!file) | |
82 | goto out; | |
83 | } | |
84 | flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE); | |
85 | ||
86 | down_write(¤t->mm->mmap_sem); | |
87 | error = do_mmap_pgoff(file, addr, len, prot, flags, pgoff); | |
88 | up_write(¤t->mm->mmap_sem); | |
89 | if (file) | |
90 | fput(file); | |
91 | ||
92 | out: | |
93 | return error; | |
94 | } | |
95 | ||
1da177e4 LT |
96 | /* |
97 | * sys_execve() executes a new program. | |
98 | */ | |
99 | asmlinkage int sys32_execve(nabi_no_regargs struct pt_regs regs) | |
100 | { | |
101 | int error; | |
102 | char * filename; | |
103 | ||
104 | filename = getname(compat_ptr(regs.regs[4])); | |
105 | error = PTR_ERR(filename); | |
106 | if (IS_ERR(filename)) | |
107 | goto out; | |
108 | error = compat_do_execve(filename, compat_ptr(regs.regs[5]), | |
109 | compat_ptr(regs.regs[6]), ®s); | |
110 | putname(filename); | |
111 | ||
112 | out: | |
113 | return error; | |
114 | } | |
115 | ||
1da177e4 LT |
116 | #define RLIM_INFINITY32 0x7fffffff |
117 | #define RESOURCE32(x) ((x > RLIM_INFINITY32) ? RLIM_INFINITY32 : x) | |
118 | ||
119 | struct rlimit32 { | |
120 | int rlim_cur; | |
121 | int rlim_max; | |
122 | }; | |
123 | ||
dbda6ac0 RB |
124 | SYSCALL_DEFINE4(32_truncate64, const char __user *, path, |
125 | unsigned long, __dummy, unsigned long, a2, unsigned long, a3) | |
1da177e4 | 126 | { |
d4e9cffa | 127 | return sys_truncate(path, merge_64(a2, a3)); |
1da177e4 LT |
128 | } |
129 | ||
dbda6ac0 RB |
130 | SYSCALL_DEFINE4(32_ftruncate64, unsigned long, fd, unsigned long, __dummy, |
131 | unsigned long, a2, unsigned long, a3) | |
1da177e4 | 132 | { |
d4e9cffa | 133 | return sys_ftruncate(fd, merge_64(a2, a3)); |
1da177e4 LT |
134 | } |
135 | ||
d6c178e9 RB |
136 | SYSCALL_DEFINE5(32_llseek, unsigned int, fd, unsigned int, offset_high, |
137 | unsigned int, offset_low, loff_t __user *, result, | |
138 | unsigned int, origin) | |
1da177e4 LT |
139 | { |
140 | return sys_llseek(fd, offset_high, offset_low, result, origin); | |
141 | } | |
142 | ||
143 | /* From the Single Unix Spec: pread & pwrite act like lseek to pos + op + | |
144 | lseek back to original location. They fail just like lseek does on | |
145 | non-seekable files. */ | |
146 | ||
dbda6ac0 RB |
147 | SYSCALL_DEFINE6(32_pread, unsigned long, fd, char __user *, buf, size_t, count, |
148 | unsigned long, unused, unsigned long, a4, unsigned long, a5) | |
1da177e4 | 149 | { |
6ad0013b | 150 | return sys_pread64(fd, buf, count, merge_64(a4, a5)); |
1da177e4 LT |
151 | } |
152 | ||
dbda6ac0 RB |
153 | SYSCALL_DEFINE6(32_pwrite, unsigned int, fd, const char __user *, buf, |
154 | size_t, count, u32, unused, u64, a4, u64, a5) | |
1da177e4 | 155 | { |
6ad0013b | 156 | return sys_pwrite64(fd, buf, count, merge_64(a4, a5)); |
1da177e4 LT |
157 | } |
158 | ||
dbda6ac0 RB |
159 | SYSCALL_DEFINE2(32_sched_rr_get_interval, compat_pid_t, pid, |
160 | struct compat_timespec __user *, interval) | |
1da177e4 LT |
161 | { |
162 | struct timespec t; | |
163 | int ret; | |
49a89efb | 164 | mm_segment_t old_fs = get_fs(); |
1da177e4 | 165 | |
49a89efb | 166 | set_fs(KERNEL_DS); |
219ac73a | 167 | ret = sys_sched_rr_get_interval(pid, (struct timespec __user *)&t); |
49a89efb | 168 | set_fs(old_fs); |
1da177e4 | 169 | if (put_user (t.tv_sec, &interval->tv_sec) || |
49a89efb | 170 | __put_user(t.tv_nsec, &interval->tv_nsec)) |
1da177e4 LT |
171 | return -EFAULT; |
172 | return ret; | |
173 | } | |
174 | ||
65f8ebe0 RB |
175 | #ifdef CONFIG_SYSVIPC |
176 | ||
dbda6ac0 RB |
177 | SYSCALL_DEFINE6(32_ipc, u32, call, long, first, long, second, long, third, |
178 | unsigned long, ptr, unsigned long, fifth) | |
1da177e4 LT |
179 | { |
180 | int version, err; | |
181 | ||
182 | version = call >> 16; /* hack for backward compatibility */ | |
183 | call &= 0xffff; | |
184 | ||
185 | switch (call) { | |
186 | case SEMOP: | |
187 | /* struct sembuf is the same on 32 and 64bit :)) */ | |
05e43966 | 188 | err = sys_semtimedop(first, compat_ptr(ptr), second, NULL); |
1da177e4 LT |
189 | break; |
190 | case SEMTIMEDOP: | |
05e43966 AN |
191 | err = compat_sys_semtimedop(first, compat_ptr(ptr), second, |
192 | compat_ptr(fifth)); | |
1da177e4 LT |
193 | break; |
194 | case SEMGET: | |
05e43966 | 195 | err = sys_semget(first, second, third); |
1da177e4 LT |
196 | break; |
197 | case SEMCTL: | |
05e43966 | 198 | err = compat_sys_semctl(first, second, third, compat_ptr(ptr)); |
1da177e4 | 199 | break; |
1da177e4 | 200 | case MSGSND: |
05e43966 | 201 | err = compat_sys_msgsnd(first, second, third, compat_ptr(ptr)); |
1da177e4 LT |
202 | break; |
203 | case MSGRCV: | |
05e43966 AN |
204 | err = compat_sys_msgrcv(first, second, fifth, third, |
205 | version, compat_ptr(ptr)); | |
1da177e4 LT |
206 | break; |
207 | case MSGGET: | |
05e43966 | 208 | err = sys_msgget((key_t) first, second); |
1da177e4 LT |
209 | break; |
210 | case MSGCTL: | |
05e43966 | 211 | err = compat_sys_msgctl(first, second, compat_ptr(ptr)); |
1da177e4 | 212 | break; |
1da177e4 | 213 | case SHMAT: |
05e43966 AN |
214 | err = compat_sys_shmat(first, second, third, version, |
215 | compat_ptr(ptr)); | |
1da177e4 LT |
216 | break; |
217 | case SHMDT: | |
05e43966 | 218 | err = sys_shmdt(compat_ptr(ptr)); |
1da177e4 LT |
219 | break; |
220 | case SHMGET: | |
05e43966 | 221 | err = sys_shmget(first, (unsigned)second, third); |
1da177e4 LT |
222 | break; |
223 | case SHMCTL: | |
05e43966 | 224 | err = compat_sys_shmctl(first, second, compat_ptr(ptr)); |
1da177e4 LT |
225 | break; |
226 | default: | |
227 | err = -EINVAL; | |
228 | break; | |
229 | } | |
230 | ||
231 | return err; | |
232 | } | |
233 | ||
65f8ebe0 RB |
234 | #else |
235 | ||
dbda6ac0 | 236 | SYSCALL_DEFINE6(32_ipc, u32, call, int, first, int, second, int, third, |
c189846e | 237 | u32, ptr, u32, fifth) |
65f8ebe0 RB |
238 | { |
239 | return -ENOSYS; | |
240 | } | |
241 | ||
242 | #endif /* CONFIG_SYSVIPC */ | |
243 | ||
05e43966 | 244 | #ifdef CONFIG_MIPS32_N32 |
dbda6ac0 | 245 | SYSCALL_DEFINE4(n32_semctl, int, semid, int, semnum, int, cmd, u32, arg) |
1da177e4 | 246 | { |
05e43966 AN |
247 | /* compat_sys_semctl expects a pointer to union semun */ |
248 | u32 __user *uptr = compat_alloc_user_space(sizeof(u32)); | |
e16d8df0 | 249 | if (put_user(arg, uptr)) |
05e43966 AN |
250 | return -EFAULT; |
251 | return compat_sys_semctl(semid, semnum, cmd, uptr); | |
1da177e4 | 252 | } |
e16d8df0 | 253 | |
dbda6ac0 RB |
254 | SYSCALL_DEFINE4(n32_msgsnd, int, msqid, u32, msgp, unsigned int, msgsz, |
255 | int, msgflg) | |
e16d8df0 AN |
256 | { |
257 | return compat_sys_msgsnd(msqid, msgsz, msgflg, compat_ptr(msgp)); | |
258 | } | |
259 | ||
dbda6ac0 RB |
260 | SYSCALL_DEFINE5(n32_msgrcv, int, msqid, u32, msgp, size_t, msgsz, |
261 | int, msgtyp, int, msgflg) | |
e16d8df0 AN |
262 | { |
263 | return compat_sys_msgrcv(msqid, msgsz, msgtyp, msgflg, IPC_64, | |
264 | compat_ptr(msgp)); | |
265 | } | |
05e43966 | 266 | #endif |
1da177e4 LT |
267 | |
268 | struct sysctl_args32 | |
269 | { | |
270 | compat_caddr_t name; | |
271 | int nlen; | |
272 | compat_caddr_t oldval; | |
273 | compat_caddr_t oldlenp; | |
274 | compat_caddr_t newval; | |
275 | compat_size_t newlen; | |
276 | unsigned int __unused[4]; | |
277 | }; | |
278 | ||
b89a8171 | 279 | #ifdef CONFIG_SYSCTL_SYSCALL |
1da177e4 | 280 | |
dbda6ac0 | 281 | SYSCALL_DEFINE1(32_sysctl, struct sysctl_args32 __user *, args) |
1da177e4 LT |
282 | { |
283 | struct sysctl_args32 tmp; | |
284 | int error; | |
219ac73a AN |
285 | size_t oldlen; |
286 | size_t __user *oldlenp = NULL; | |
287 | unsigned long addr = (((unsigned long)&args->__unused[0]) + 7) & ~7; | |
1da177e4 LT |
288 | |
289 | if (copy_from_user(&tmp, args, sizeof(tmp))) | |
290 | return -EFAULT; | |
291 | ||
292 | if (tmp.oldval && tmp.oldlenp) { | |
293 | /* Duh, this is ugly and might not work if sysctl_args | |
294 | is in read-only memory, but do_sysctl does indirectly | |
295 | a lot of uaccess in both directions and we'd have to | |
296 | basically copy the whole sysctl.c here, and | |
297 | glibc's __sysctl uses rw memory for the structure | |
298 | anyway. */ | |
219ac73a AN |
299 | if (get_user(oldlen, (u32 __user *)A(tmp.oldlenp)) || |
300 | put_user(oldlen, (size_t __user *)addr)) | |
1da177e4 | 301 | return -EFAULT; |
219ac73a | 302 | oldlenp = (size_t __user *)addr; |
1da177e4 LT |
303 | } |
304 | ||
305 | lock_kernel(); | |
219ac73a AN |
306 | error = do_sysctl((int __user *)A(tmp.name), tmp.nlen, (void __user *)A(tmp.oldval), |
307 | oldlenp, (void __user *)A(tmp.newval), tmp.newlen); | |
1da177e4 LT |
308 | unlock_kernel(); |
309 | if (oldlenp) { | |
310 | if (!error) { | |
219ac73a AN |
311 | if (get_user(oldlen, (size_t __user *)addr) || |
312 | put_user(oldlen, (u32 __user *)A(tmp.oldlenp))) | |
1da177e4 LT |
313 | error = -EFAULT; |
314 | } | |
315 | copy_to_user(args->__unused, tmp.__unused, sizeof(tmp.__unused)); | |
316 | } | |
317 | return error; | |
318 | } | |
319 | ||
dbda6ac0 RB |
320 | #else |
321 | ||
322 | SYSCALL_DEFINE1(32_sysctl, struct sysctl_args32 __user *, args) | |
323 | { | |
324 | return -ENOSYS; | |
325 | } | |
326 | ||
b89a8171 | 327 | #endif /* CONFIG_SYSCTL_SYSCALL */ |
1da177e4 | 328 | |
dbda6ac0 | 329 | SYSCALL_DEFINE1(32_newuname, struct new_utsname __user *, name) |
1da177e4 LT |
330 | { |
331 | int ret = 0; | |
332 | ||
333 | down_read(&uts_sem); | |
e9ff3990 | 334 | if (copy_to_user(name, utsname(), sizeof *name)) |
1da177e4 LT |
335 | ret = -EFAULT; |
336 | up_read(&uts_sem); | |
337 | ||
338 | if (current->personality == PER_LINUX32 && !ret) | |
339 | if (copy_to_user(name->machine, "mips\0\0\0", 8)) | |
340 | ret = -EFAULT; | |
341 | ||
342 | return ret; | |
343 | } | |
344 | ||
dbda6ac0 | 345 | SYSCALL_DEFINE1(32_personality, unsigned long, personality) |
1da177e4 LT |
346 | { |
347 | int ret; | |
53571ce4 TS |
348 | personality &= 0xffffffff; |
349 | if (personality(current->personality) == PER_LINUX32 && | |
350 | personality == PER_LINUX) | |
1da177e4 LT |
351 | personality = PER_LINUX32; |
352 | ret = sys_personality(personality); | |
353 | if (ret == PER_LINUX32) | |
354 | ret = PER_LINUX; | |
355 | return ret; | |
356 | } | |
357 | ||
dbda6ac0 RB |
358 | SYSCALL_DEFINE4(32_sendfile, long, out_fd, long, in_fd, |
359 | compat_off_t __user *, offset, s32, count) | |
1da177e4 LT |
360 | { |
361 | mm_segment_t old_fs = get_fs(); | |
362 | int ret; | |
363 | off_t of; | |
42a3b4f2 | 364 | |
1da177e4 LT |
365 | if (offset && get_user(of, offset)) |
366 | return -EFAULT; | |
42a3b4f2 | 367 | |
1da177e4 | 368 | set_fs(KERNEL_DS); |
219ac73a | 369 | ret = sys_sendfile(out_fd, in_fd, offset ? (off_t __user *)&of : NULL, count); |
1da177e4 | 370 | set_fs(old_fs); |
42a3b4f2 | 371 | |
1da177e4 LT |
372 | if (offset && put_user(of, offset)) |
373 | return -EFAULT; | |
42a3b4f2 | 374 | |
1da177e4 LT |
375 | return ret; |
376 | } | |
377 | ||
378 | asmlinkage ssize_t sys32_readahead(int fd, u32 pad0, u64 a2, u64 a3, | |
379 | size_t count) | |
380 | { | |
381 | return sys_readahead(fd, merge_64(a2, a3), count); | |
382 | } | |
383 | ||
a8d587a7 RB |
384 | asmlinkage long sys32_sync_file_range(int fd, int __pad, |
385 | unsigned long a2, unsigned long a3, | |
386 | unsigned long a4, unsigned long a5, | |
387 | int flags) | |
388 | { | |
389 | return sys_sync_file_range(fd, | |
390 | merge_64(a2, a3), merge_64(a4, a5), | |
391 | flags); | |
392 | } | |
393 | ||
8676d2e0 AN |
394 | asmlinkage long sys32_fadvise64_64(int fd, int __pad, |
395 | unsigned long a2, unsigned long a3, | |
396 | unsigned long a4, unsigned long a5, | |
397 | int flags) | |
398 | { | |
399 | return sys_fadvise64_64(fd, | |
400 | merge_64(a2, a3), merge_64(a4, a5), | |
401 | flags); | |
402 | } | |
403 | ||
4dc46775 RB |
404 | asmlinkage long sys32_fallocate(int fd, int mode, unsigned offset_a2, |
405 | unsigned offset_a3, unsigned len_a4, unsigned len_a5) | |
406 | { | |
407 | return sys_fallocate(fd, mode, merge_64(offset_a2, offset_a3), | |
408 | merge_64(len_a4, len_a5)); | |
409 | } | |
410 | ||
3c37026d | 411 | save_static_function(sys32_clone); |
f5dbeaf5 | 412 | static int noinline __used |
3c37026d RB |
413 | _sys32_clone(nabi_no_regargs struct pt_regs regs) |
414 | { | |
415 | unsigned long clone_flags; | |
416 | unsigned long newsp; | |
417 | int __user *parent_tidptr, *child_tidptr; | |
418 | ||
419 | clone_flags = regs.regs[4]; | |
420 | newsp = regs.regs[5]; | |
421 | if (!newsp) | |
422 | newsp = regs.regs[29]; | |
219ac73a | 423 | parent_tidptr = (int __user *) regs.regs[6]; |
3c37026d RB |
424 | |
425 | /* Use __dummy4 instead of getting it off the stack, so that | |
426 | syscall() works. */ | |
427 | child_tidptr = (int __user *) __dummy4; | |
428 | return do_fork(clone_flags, newsp, ®s, 0, | |
429 | parent_tidptr, child_tidptr); | |
430 | } |