2 * sys_ppc32.c: Conversion between 32bit and 64bit native syscalls.
4 * Copyright (C) 2001 IBM
5 * Copyright (C) 1997,1998 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
6 * Copyright (C) 1997 David S. Miller (davem@caip.rutgers.edu)
8 * These routines maintain argument size conversion between 32bit and 64bit
11 * This program is free software; you can redistribute it and/or
12 * modify it under the terms of the GNU General Public License
13 * as published by the Free Software Foundation; either version
14 * 2 of the License, or (at your option) any later version.
17 #include <linux/kernel.h>
18 #include <linux/sched.h>
21 #include <linux/file.h>
22 #include <linux/signal.h>
23 #include <linux/resource.h>
24 #include <linux/times.h>
25 #include <linux/utsname.h>
26 #include <linux/smp.h>
27 #include <linux/smp_lock.h>
28 #include <linux/sem.h>
29 #include <linux/msg.h>
30 #include <linux/shm.h>
31 #include <linux/poll.h>
32 #include <linux/personality.h>
33 #include <linux/stat.h>
34 #include <linux/mman.h>
36 #include <linux/syscalls.h>
37 #include <linux/unistd.h>
38 #include <linux/sysctl.h>
39 #include <linux/binfmts.h>
40 #include <linux/security.h>
41 #include <linux/compat.h>
42 #include <linux/ptrace.h>
43 #include <linux/elf.h>
44 #include <linux/ipc.h>
46 #include <asm/ptrace.h>
47 #include <asm/types.h>
48 #include <asm/uaccess.h>
49 #include <asm/unistd.h>
51 #include <asm/mmu_context.h>
52 #include <asm/ppc-pci.h>
53 #include <asm/syscalls.h>
56 asmlinkage long ppc32_select(u32 n, compat_ulong_t __user *inp,
57 compat_ulong_t __user *outp, compat_ulong_t __user *exp,
61 return compat_sys_select((int)n, inp, outp, exp, compat_ptr(tvp_x));
64 /* Note: it is necessary to treat option as an unsigned int,
65 * with the corresponding cast to a signed int to insure that the
66 * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
67 * and the register representation of a signed int (msr in 64-bit mode) is performed.
69 asmlinkage long compat_sys_sysfs(u32 option, u32 arg1, u32 arg2)
71 return sys_sysfs((int)option, arg1, arg2);
75 long compat_sys_ipc(u32 call, u32 first, u32 second, u32 third, compat_uptr_t ptr,
80 version = call >> 16; /* hack for backward compatibility */
87 /* sign extend semid */
88 return compat_sys_semtimedop((int)first,
89 compat_ptr(ptr), second,
91 /* else fall through for normal semop() */
93 /* struct sembuf is the same on 32 and 64bit :)) */
94 /* sign extend semid */
95 return sys_semtimedop((int)first, compat_ptr(ptr), second,
98 /* sign extend key, nsems */
99 return sys_semget((int)first, (int)second, third);
101 /* sign extend semid, semnum */
102 return compat_sys_semctl((int)first, (int)second, third,
106 /* sign extend msqid */
107 return compat_sys_msgsnd((int)first, (int)second, third,
110 /* sign extend msqid, msgtyp */
111 return compat_sys_msgrcv((int)first, second, (int)fifth,
112 third, version, compat_ptr(ptr));
114 /* sign extend key */
115 return sys_msgget((int)first, second);
117 /* sign extend msqid */
118 return compat_sys_msgctl((int)first, second, compat_ptr(ptr));
121 /* sign extend shmid */
122 return compat_sys_shmat((int)first, second, third, version,
125 return sys_shmdt(compat_ptr(ptr));
127 /* sign extend key_t */
128 return sys_shmget((int)first, second, third);
130 /* sign extend shmid */
131 return compat_sys_shmctl((int)first, second, compat_ptr(ptr));
141 /* Note: it is necessary to treat out_fd and in_fd as unsigned ints,
142 * with the corresponding cast to a signed int to insure that the
143 * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
144 * and the register representation of a signed int (msr in 64-bit mode) is performed.
146 asmlinkage long compat_sys_sendfile(u32 out_fd, u32 in_fd, compat_off_t __user * offset, u32 count)
148 mm_segment_t old_fs = get_fs();
153 if (offset && get_user(of, offset))
156 /* The __user pointer cast is valid because of the set_fs() */
158 up = offset ? (off_t __user *) &of : NULL;
159 ret = sys_sendfile((int)out_fd, (int)in_fd, up, count);
162 if (offset && put_user(of, offset))
168 asmlinkage int compat_sys_sendfile64(int out_fd, int in_fd, compat_loff_t __user *offset, s32 count)
170 mm_segment_t old_fs = get_fs();
175 if (offset && get_user(lof, offset))
178 /* The __user pointer cast is valid because of the set_fs() */
180 up = offset ? (loff_t __user *) &lof : NULL;
181 ret = sys_sendfile64(out_fd, in_fd, up, count);
184 if (offset && put_user(lof, offset))
190 long compat_sys_execve(unsigned long a0, unsigned long a1, unsigned long a2,
191 unsigned long a3, unsigned long a4, unsigned long a5,
192 struct pt_regs *regs)
197 filename = getname((char __user *) a0);
198 error = PTR_ERR(filename);
199 if (IS_ERR(filename))
201 flush_fp_to_thread(current);
202 flush_altivec_to_thread(current);
204 error = compat_do_execve(filename, compat_ptr(a1), compat_ptr(a2), regs);
212 /* Note: it is necessary to treat option as an unsigned int,
213 * with the corresponding cast to a signed int to insure that the
214 * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
215 * and the register representation of a signed int (msr in 64-bit mode) is performed.
217 asmlinkage long compat_sys_prctl(u32 option, u32 arg2, u32 arg3, u32 arg4, u32 arg5)
219 return sys_prctl((int)option,
220 (unsigned long) arg2,
221 (unsigned long) arg3,
222 (unsigned long) arg4,
223 (unsigned long) arg5);
226 /* Note: it is necessary to treat pid as an unsigned int,
227 * with the corresponding cast to a signed int to insure that the
228 * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
229 * and the register representation of a signed int (msr in 64-bit mode) is performed.
231 asmlinkage long compat_sys_sched_rr_get_interval(u32 pid, struct compat_timespec __user *interval)
235 mm_segment_t old_fs = get_fs ();
237 /* The __user pointer cast is valid because of the set_fs() */
239 ret = sys_sched_rr_get_interval((int)pid, (struct timespec __user *) &t);
241 if (put_compat_timespec(&t, interval))
246 /* Note: it is necessary to treat mode as an unsigned int,
247 * with the corresponding cast to a signed int to insure that the
248 * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
249 * and the register representation of a signed int (msr in 64-bit mode) is performed.
251 asmlinkage long compat_sys_access(const char __user * filename, u32 mode)
253 return sys_access(filename, (int)mode);
257 /* Note: it is necessary to treat mode as an unsigned int,
258 * with the corresponding cast to a signed int to insure that the
259 * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
260 * and the register representation of a signed int (msr in 64-bit mode) is performed.
262 asmlinkage long compat_sys_creat(const char __user * pathname, u32 mode)
264 return sys_creat(pathname, (int)mode);
268 /* Note: it is necessary to treat pid and options as unsigned ints,
269 * with the corresponding cast to a signed int to insure that the
270 * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
271 * and the register representation of a signed int (msr in 64-bit mode) is performed.
273 asmlinkage long compat_sys_waitpid(u32 pid, unsigned int __user * stat_addr, u32 options)
275 return sys_waitpid((int)pid, stat_addr, (int)options);
279 /* Note: it is necessary to treat gidsetsize as an unsigned int,
280 * with the corresponding cast to a signed int to insure that the
281 * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
282 * and the register representation of a signed int (msr in 64-bit mode) is performed.
284 asmlinkage long compat_sys_getgroups(u32 gidsetsize, gid_t __user *grouplist)
286 return sys_getgroups((int)gidsetsize, grouplist);
290 /* Note: it is necessary to treat pid as an unsigned int,
291 * with the corresponding cast to a signed int to insure that the
292 * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
293 * and the register representation of a signed int (msr in 64-bit mode) is performed.
295 asmlinkage long compat_sys_getpgid(u32 pid)
297 return sys_getpgid((int)pid);
302 /* Note: it is necessary to treat pid as an unsigned int,
303 * with the corresponding cast to a signed int to insure that the
304 * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
305 * and the register representation of a signed int (msr in 64-bit mode) is performed.
307 asmlinkage long compat_sys_getsid(u32 pid)
309 return sys_getsid((int)pid);
313 /* Note: it is necessary to treat pid and sig as unsigned ints,
314 * with the corresponding cast to a signed int to insure that the
315 * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
316 * and the register representation of a signed int (msr in 64-bit mode) is performed.
318 asmlinkage long compat_sys_kill(u32 pid, u32 sig)
320 return sys_kill((int)pid, (int)sig);
324 /* Note: it is necessary to treat mode as an unsigned int,
325 * with the corresponding cast to a signed int to insure that the
326 * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
327 * and the register representation of a signed int (msr in 64-bit mode) is performed.
329 asmlinkage long compat_sys_mkdir(const char __user * pathname, u32 mode)
331 return sys_mkdir(pathname, (int)mode);
334 long compat_sys_nice(u32 increment)
336 /* sign extend increment */
337 return sys_nice((int)increment);
340 off_t ppc32_lseek(unsigned int fd, u32 offset, unsigned int origin)
343 return sys_lseek(fd, (int)offset, origin);
346 /* Note: it is necessary to treat bufsiz as an unsigned int,
347 * with the corresponding cast to a signed int to insure that the
348 * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
349 * and the register representation of a signed int (msr in 64-bit mode) is performed.
351 asmlinkage long compat_sys_readlink(const char __user * path, char __user * buf, u32 bufsiz)
353 return sys_readlink(path, buf, (int)bufsiz);
356 /* Note: it is necessary to treat option as an unsigned int,
357 * with the corresponding cast to a signed int to insure that the
358 * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
359 * and the register representation of a signed int (msr in 64-bit mode) is performed.
361 asmlinkage long compat_sys_sched_get_priority_max(u32 policy)
363 return sys_sched_get_priority_max((int)policy);
367 /* Note: it is necessary to treat policy as an unsigned int,
368 * with the corresponding cast to a signed int to insure that the
369 * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
370 * and the register representation of a signed int (msr in 64-bit mode) is performed.
372 asmlinkage long compat_sys_sched_get_priority_min(u32 policy)
374 return sys_sched_get_priority_min((int)policy);
378 /* Note: it is necessary to treat pid as an unsigned int,
379 * with the corresponding cast to a signed int to insure that the
380 * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
381 * and the register representation of a signed int (msr in 64-bit mode) is performed.
383 asmlinkage long compat_sys_sched_getparam(u32 pid, struct sched_param __user *param)
385 return sys_sched_getparam((int)pid, param);
389 /* Note: it is necessary to treat pid as an unsigned int,
390 * with the corresponding cast to a signed int to insure that the
391 * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
392 * and the register representation of a signed int (msr in 64-bit mode) is performed.
394 asmlinkage long compat_sys_sched_getscheduler(u32 pid)
396 return sys_sched_getscheduler((int)pid);
400 /* Note: it is necessary to treat pid as an unsigned int,
401 * with the corresponding cast to a signed int to insure that the
402 * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
403 * and the register representation of a signed int (msr in 64-bit mode) is performed.
405 asmlinkage long compat_sys_sched_setparam(u32 pid, struct sched_param __user *param)
407 return sys_sched_setparam((int)pid, param);
411 /* Note: it is necessary to treat pid and policy as unsigned ints,
412 * with the corresponding cast to a signed int to insure that the
413 * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
414 * and the register representation of a signed int (msr in 64-bit mode) is performed.
416 asmlinkage long compat_sys_sched_setscheduler(u32 pid, u32 policy, struct sched_param __user *param)
418 return sys_sched_setscheduler((int)pid, (int)policy, param);
422 /* Note: it is necessary to treat len as an unsigned int,
423 * with the corresponding cast to a signed int to insure that the
424 * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
425 * and the register representation of a signed int (msr in 64-bit mode) is performed.
427 asmlinkage long compat_sys_setdomainname(char __user *name, u32 len)
429 return sys_setdomainname(name, (int)len);
433 /* Note: it is necessary to treat gidsetsize as an unsigned int,
434 * with the corresponding cast to a signed int to insure that the
435 * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
436 * and the register representation of a signed int (msr in 64-bit mode) is performed.
438 asmlinkage long compat_sys_setgroups(u32 gidsetsize, gid_t __user *grouplist)
440 return sys_setgroups((int)gidsetsize, grouplist);
444 asmlinkage long compat_sys_sethostname(char __user *name, u32 len)
446 /* sign extend len */
447 return sys_sethostname(name, (int)len);
451 /* Note: it is necessary to treat pid and pgid as unsigned ints,
452 * with the corresponding cast to a signed int to insure that the
453 * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
454 * and the register representation of a signed int (msr in 64-bit mode) is performed.
456 asmlinkage long compat_sys_setpgid(u32 pid, u32 pgid)
458 return sys_setpgid((int)pid, (int)pgid);
461 long compat_sys_getpriority(u32 which, u32 who)
463 /* sign extend which and who */
464 return sys_getpriority((int)which, (int)who);
467 long compat_sys_setpriority(u32 which, u32 who, u32 niceval)
469 /* sign extend which, who and niceval */
470 return sys_setpriority((int)which, (int)who, (int)niceval);
473 long compat_sys_ioprio_get(u32 which, u32 who)
475 /* sign extend which and who */
476 return sys_ioprio_get((int)which, (int)who);
479 long compat_sys_ioprio_set(u32 which, u32 who, u32 ioprio)
481 /* sign extend which, who and ioprio */
482 return sys_ioprio_set((int)which, (int)who, (int)ioprio);
485 /* Note: it is necessary to treat newmask as an unsigned int,
486 * with the corresponding cast to a signed int to insure that the
487 * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
488 * and the register representation of a signed int (msr in 64-bit mode) is performed.
490 asmlinkage long compat_sys_ssetmask(u32 newmask)
492 return sys_ssetmask((int) newmask);
495 asmlinkage long compat_sys_syslog(u32 type, char __user * buf, u32 len)
497 /* sign extend len */
498 return sys_syslog(type, buf, (int)len);
502 /* Note: it is necessary to treat mask as an unsigned int,
503 * with the corresponding cast to a signed int to insure that the
504 * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
505 * and the register representation of a signed int (msr in 64-bit mode) is performed.
507 asmlinkage long compat_sys_umask(u32 mask)
509 return sys_umask((int)mask);
512 #ifdef CONFIG_SYSCTL_SYSCALL
513 struct __sysctl_args32 {
523 asmlinkage long compat_sys_sysctl(struct __sysctl_args32 __user *args)
525 struct __sysctl_args32 tmp;
528 size_t __user *oldlenp = NULL;
529 unsigned long addr = (((unsigned long)&args->__unused[0]) + 7) & ~7;
531 if (copy_from_user(&tmp, args, sizeof(tmp)))
534 if (tmp.oldval && tmp.oldlenp) {
535 /* Duh, this is ugly and might not work if sysctl_args
536 is in read-only memory, but do_sysctl does indirectly
537 a lot of uaccess in both directions and we'd have to
538 basically copy the whole sysctl.c here, and
539 glibc's __sysctl uses rw memory for the structure
541 oldlenp = (size_t __user *)addr;
542 if (get_user(oldlen, (compat_size_t __user *)compat_ptr(tmp.oldlenp)) ||
543 put_user(oldlen, oldlenp))
548 error = do_sysctl(compat_ptr(tmp.name), tmp.nlen,
549 compat_ptr(tmp.oldval), oldlenp,
550 compat_ptr(tmp.newval), tmp.newlen);
554 if (get_user(oldlen, oldlenp) ||
555 put_user(oldlen, (compat_size_t __user *)compat_ptr(tmp.oldlenp)))
558 copy_to_user(args->__unused, tmp.__unused, sizeof(tmp.__unused));
564 unsigned long compat_sys_mmap2(unsigned long addr, size_t len,
565 unsigned long prot, unsigned long flags,
566 unsigned long fd, unsigned long pgoff)
568 /* This should remain 12 even if PAGE_SIZE changes */
569 return sys_mmap(addr, len, prot, flags, fd, pgoff << 12);
572 long compat_sys_tgkill(u32 tgid, u32 pid, int sig)
574 /* sign extend tgid, pid */
575 return sys_tgkill((int)tgid, (int)pid, sig);
580 * The 32 bit ABI passes long longs in an odd even register pair.
583 compat_ssize_t compat_sys_pread64(unsigned int fd, char __user *ubuf, compat_size_t count,
584 u32 reg6, u32 poshi, u32 poslo)
586 return sys_pread64(fd, ubuf, count, ((loff_t)poshi << 32) | poslo);
589 compat_ssize_t compat_sys_pwrite64(unsigned int fd, char __user *ubuf, compat_size_t count,
590 u32 reg6, u32 poshi, u32 poslo)
592 return sys_pwrite64(fd, ubuf, count, ((loff_t)poshi << 32) | poslo);
595 compat_ssize_t compat_sys_readahead(int fd, u32 r4, u32 offhi, u32 offlo, u32 count)
597 return sys_readahead(fd, ((loff_t)offhi << 32) | offlo, count);
600 asmlinkage int compat_sys_truncate64(const char __user * path, u32 reg4,
601 unsigned long high, unsigned long low)
603 return sys_truncate(path, (high << 32) | low);
606 asmlinkage long compat_sys_fallocate(int fd, int mode, u32 offhi, u32 offlo,
607 u32 lenhi, u32 lenlo)
609 return sys_fallocate(fd, mode, ((loff_t)offhi << 32) | offlo,
610 ((loff_t)lenhi << 32) | lenlo);
613 asmlinkage int compat_sys_ftruncate64(unsigned int fd, u32 reg4, unsigned long high,
616 return sys_ftruncate(fd, (high << 32) | low);
619 long ppc32_lookup_dcookie(u32 cookie_high, u32 cookie_low, char __user *buf,
622 return sys_lookup_dcookie((u64)cookie_high << 32 | cookie_low,
626 long ppc32_fadvise64(int fd, u32 unused, u32 offset_high, u32 offset_low,
627 size_t len, int advice)
629 return sys_fadvise64(fd, (u64)offset_high << 32 | offset_low, len,
633 asmlinkage long compat_sys_add_key(const char __user *_type,
634 const char __user *_description,
635 const void __user *_payload,
639 return sys_add_key(_type, _description, _payload, plen, ringid);
642 asmlinkage long compat_sys_request_key(const char __user *_type,
643 const char __user *_description,
644 const char __user *_callout_info,
647 return sys_request_key(_type, _description, _callout_info, destringid);
650 asmlinkage long compat_sys_sync_file_range2(int fd, unsigned int flags,
651 unsigned offset_hi, unsigned offset_lo,
652 unsigned nbytes_hi, unsigned nbytes_lo)
654 loff_t offset = ((loff_t)offset_hi << 32) | offset_lo;
655 loff_t nbytes = ((loff_t)nbytes_hi << 32) | nbytes_lo;
657 return sys_sync_file_range(fd, offset, nbytes, flags);