2 * Conversion between 32-bit and 64-bit native system calls.
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)
8 #include <linux/compiler.h>
10 #include <linux/errno.h>
11 #include <linux/file.h>
12 #include <linux/smp_lock.h>
13 #include <linux/highuid.h>
14 #include <linux/dirent.h>
15 #include <linux/resource.h>
16 #include <linux/highmem.h>
17 #include <linux/time.h>
18 #include <linux/times.h>
19 #include <linux/poll.h>
20 #include <linux/slab.h>
21 #include <linux/skbuff.h>
22 #include <linux/filter.h>
23 #include <linux/shm.h>
24 #include <linux/sem.h>
25 #include <linux/msg.h>
26 #include <linux/icmpv6.h>
27 #include <linux/syscalls.h>
28 #include <linux/sysctl.h>
29 #include <linux/utime.h>
30 #include <linux/utsname.h>
31 #include <linux/personality.h>
32 #include <linux/dnotify.h>
33 #include <linux/module.h>
34 #include <linux/binfmts.h>
35 #include <linux/security.h>
36 #include <linux/compat.h>
37 #include <linux/vfs.h>
42 #include <asm/compat-signal.h>
45 #include <asm/uaccess.h>
46 #include <asm/mmu_context.h>
49 /* Use this to get at 32-bit user passed pointers. */
50 /* A() macro should be used for places where you e.g.
51 have some internal variable u32 and just want to get
52 rid of a compiler warning. AA() has to be used in
53 places where you want to convert a function argument
54 to 32bit pointer or when you e.g. access pt_regs
55 structure and want to consider 32bit registers only.
57 #define A(__x) ((unsigned long)(__x))
58 #define AA(__x) ((unsigned long)((int)__x))
61 #define merge_64(r1,r2) ((((r1) & 0xffffffffUL) << 32) + ((r2) & 0xffffffffUL))
64 #define merge_64(r1,r2) ((((r2) & 0xffffffffUL) << 32) + ((r1) & 0xffffffffUL))
68 * Revalidate the inode. This is required for proper NFS attribute caching.
71 int cp_compat_stat(struct kstat *stat, struct compat_stat __user *statbuf)
73 struct compat_stat tmp;
75 if (!new_valid_dev(stat->dev) || !new_valid_dev(stat->rdev))
78 memset(&tmp, 0, sizeof(tmp));
79 tmp.st_dev = new_encode_dev(stat->dev);
80 tmp.st_ino = stat->ino;
81 if (sizeof(tmp.st_ino) < sizeof(stat->ino) && tmp.st_ino != stat->ino)
83 tmp.st_mode = stat->mode;
84 tmp.st_nlink = stat->nlink;
85 SET_UID(tmp.st_uid, stat->uid);
86 SET_GID(tmp.st_gid, stat->gid);
87 tmp.st_rdev = new_encode_dev(stat->rdev);
88 tmp.st_size = stat->size;
89 tmp.st_atime = stat->atime.tv_sec;
90 tmp.st_mtime = stat->mtime.tv_sec;
91 tmp.st_ctime = stat->ctime.tv_sec;
93 tmp.st_atime_nsec = stat->atime.tv_nsec;
94 tmp.st_mtime_nsec = stat->mtime.tv_nsec;
95 tmp.st_ctime_nsec = stat->ctime.tv_nsec;
97 tmp.st_blocks = stat->blocks;
98 tmp.st_blksize = stat->blksize;
99 return copy_to_user(statbuf,&tmp,sizeof(tmp)) ? -EFAULT : 0;
102 asmlinkage unsigned long
103 sys32_mmap2(unsigned long addr, unsigned long len, unsigned long prot,
104 unsigned long flags, unsigned long fd, unsigned long pgoff)
106 struct file * file = NULL;
110 if (pgoff & (~PAGE_MASK >> 12))
112 pgoff >>= PAGE_SHIFT-12;
114 if (!(flags & MAP_ANONYMOUS)) {
120 flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE);
122 down_write(¤t->mm->mmap_sem);
123 error = do_mmap_pgoff(file, addr, len, prot, flags, pgoff);
124 up_write(¤t->mm->mmap_sem);
133 asmlinkage int sys_truncate64(const char __user *path, unsigned int high,
138 return sys_truncate(path, ((long) high << 32) | low);
141 asmlinkage int sys_ftruncate64(unsigned int fd, unsigned int high,
146 return sys_ftruncate(fd, ((long) high << 32) | low);
150 * sys_execve() executes a new program.
152 asmlinkage int sys32_execve(nabi_no_regargs struct pt_regs regs)
157 filename = getname(compat_ptr(regs.regs[4]));
158 error = PTR_ERR(filename);
159 if (IS_ERR(filename))
161 error = compat_do_execve(filename, compat_ptr(regs.regs[5]),
162 compat_ptr(regs.regs[6]), ®s);
169 #define RLIM_INFINITY32 0x7fffffff
170 #define RESOURCE32(x) ((x > RLIM_INFINITY32) ? RLIM_INFINITY32 : x)
178 asmlinkage long sys32_truncate64(const char __user * path, unsigned long __dummy,
179 int length_hi, int length_lo)
182 asmlinkage long sys32_truncate64(const char __user * path, unsigned long __dummy,
183 int length_lo, int length_hi)
188 length = ((unsigned long) length_hi << 32) | (unsigned int) length_lo;
190 return sys_truncate(path, length);
194 asmlinkage long sys32_ftruncate64(unsigned int fd, unsigned long __dummy,
195 int length_hi, int length_lo)
198 asmlinkage long sys32_ftruncate64(unsigned int fd, unsigned long __dummy,
199 int length_lo, int length_hi)
204 length = ((unsigned long) length_hi << 32) | (unsigned int) length_lo;
206 return sys_ftruncate(fd, length);
210 get_tv32(struct timeval *o, struct compat_timeval __user *i)
212 return (!access_ok(VERIFY_READ, i, sizeof(*i)) ||
213 (__get_user(o->tv_sec, &i->tv_sec) |
214 __get_user(o->tv_usec, &i->tv_usec)));
218 put_tv32(struct compat_timeval __user *o, struct timeval *i)
220 return (!access_ok(VERIFY_WRITE, o, sizeof(*o)) ||
221 (__put_user(i->tv_sec, &o->tv_sec) |
222 __put_user(i->tv_usec, &o->tv_usec)));
225 extern struct timezone sys_tz;
228 sys32_gettimeofday(struct compat_timeval __user *tv, struct timezone __user *tz)
232 do_gettimeofday(&ktv);
233 if (put_tv32(tv, &ktv))
237 if (copy_to_user(tz, &sys_tz, sizeof(sys_tz)))
243 static inline long get_ts32(struct timespec *o, struct compat_timeval __user *i)
247 if (!access_ok(VERIFY_READ, i, sizeof(*i)))
249 if (__get_user(o->tv_sec, &i->tv_sec))
251 if (__get_user(usec, &i->tv_usec))
253 o->tv_nsec = usec * 1000;
258 sys32_settimeofday(struct compat_timeval __user *tv, struct timezone __user *tz)
264 if (get_ts32(&kts, tv))
268 if (copy_from_user(&ktz, tz, sizeof(ktz)))
272 return do_sys_settimeofday(tv ? &kts : NULL, tz ? &ktz : NULL);
275 asmlinkage int sys32_llseek(unsigned int fd, unsigned int offset_high,
276 unsigned int offset_low, loff_t __user * result,
279 return sys_llseek(fd, offset_high, offset_low, result, origin);
282 /* From the Single Unix Spec: pread & pwrite act like lseek to pos + op +
283 lseek back to original location. They fail just like lseek does on
284 non-seekable files. */
286 asmlinkage ssize_t sys32_pread(unsigned int fd, char __user * buf,
287 size_t count, u32 unused, u64 a4, u64 a5)
289 return sys_pread64(fd, buf, count, merge_64(a4, a5));
292 asmlinkage ssize_t sys32_pwrite(unsigned int fd, const char __user * buf,
293 size_t count, u32 unused, u64 a4, u64 a5)
295 return sys_pwrite64(fd, buf, count, merge_64(a4, a5));
298 asmlinkage int sys32_sched_rr_get_interval(compat_pid_t pid,
299 struct compat_timespec __user *interval)
303 mm_segment_t old_fs = get_fs ();
306 ret = sys_sched_rr_get_interval(pid, (struct timespec __user *)&t);
308 if (put_user (t.tv_sec, &interval->tv_sec) ||
309 __put_user (t.tv_nsec, &interval->tv_nsec))
315 sys32_ipc (u32 call, int first, int second, int third, u32 ptr, u32 fifth)
319 version = call >> 16; /* hack for backward compatibility */
324 /* struct sembuf is the same on 32 and 64bit :)) */
325 err = sys_semtimedop(first, compat_ptr(ptr), second, NULL);
328 err = compat_sys_semtimedop(first, compat_ptr(ptr), second,
332 err = sys_semget(first, second, third);
335 err = compat_sys_semctl(first, second, third, compat_ptr(ptr));
338 err = compat_sys_msgsnd(first, second, third, compat_ptr(ptr));
341 err = compat_sys_msgrcv(first, second, fifth, third,
342 version, compat_ptr(ptr));
345 err = sys_msgget((key_t) first, second);
348 err = compat_sys_msgctl(first, second, compat_ptr(ptr));
351 err = compat_sys_shmat(first, second, third, version,
355 err = sys_shmdt(compat_ptr(ptr));
358 err = sys_shmget(first, (unsigned)second, third);
361 err = compat_sys_shmctl(first, second, compat_ptr(ptr));
371 #ifdef CONFIG_MIPS32_N32
372 asmlinkage long sysn32_semctl(int semid, int semnum, int cmd, u32 arg)
374 /* compat_sys_semctl expects a pointer to union semun */
375 u32 __user *uptr = compat_alloc_user_space(sizeof(u32));
376 if (put_user(arg, uptr))
378 return compat_sys_semctl(semid, semnum, cmd, uptr);
381 asmlinkage long sysn32_msgsnd(int msqid, u32 msgp, unsigned msgsz, int msgflg)
383 return compat_sys_msgsnd(msqid, msgsz, msgflg, compat_ptr(msgp));
386 asmlinkage long sysn32_msgrcv(int msqid, u32 msgp, size_t msgsz, int msgtyp,
389 return compat_sys_msgrcv(msqid, msgsz, msgtyp, msgflg, IPC_64,
398 compat_caddr_t oldval;
399 compat_caddr_t oldlenp;
400 compat_caddr_t newval;
401 compat_size_t newlen;
402 unsigned int __unused[4];
405 #ifdef CONFIG_SYSCTL_SYSCALL
407 asmlinkage long sys32_sysctl(struct sysctl_args32 __user *args)
409 struct sysctl_args32 tmp;
412 size_t __user *oldlenp = NULL;
413 unsigned long addr = (((unsigned long)&args->__unused[0]) + 7) & ~7;
415 if (copy_from_user(&tmp, args, sizeof(tmp)))
418 if (tmp.oldval && tmp.oldlenp) {
419 /* Duh, this is ugly and might not work if sysctl_args
420 is in read-only memory, but do_sysctl does indirectly
421 a lot of uaccess in both directions and we'd have to
422 basically copy the whole sysctl.c here, and
423 glibc's __sysctl uses rw memory for the structure
425 if (get_user(oldlen, (u32 __user *)A(tmp.oldlenp)) ||
426 put_user(oldlen, (size_t __user *)addr))
428 oldlenp = (size_t __user *)addr;
432 error = do_sysctl((int __user *)A(tmp.name), tmp.nlen, (void __user *)A(tmp.oldval),
433 oldlenp, (void __user *)A(tmp.newval), tmp.newlen);
437 if (get_user(oldlen, (size_t __user *)addr) ||
438 put_user(oldlen, (u32 __user *)A(tmp.oldlenp)))
441 copy_to_user(args->__unused, tmp.__unused, sizeof(tmp.__unused));
446 #endif /* CONFIG_SYSCTL_SYSCALL */
448 asmlinkage long sys32_newuname(struct new_utsname __user * name)
453 if (copy_to_user(name, utsname(), sizeof *name))
457 if (current->personality == PER_LINUX32 && !ret)
458 if (copy_to_user(name->machine, "mips\0\0\0", 8))
464 asmlinkage int sys32_personality(unsigned long personality)
467 personality &= 0xffffffff;
468 if (personality(current->personality) == PER_LINUX32 &&
469 personality == PER_LINUX)
470 personality = PER_LINUX32;
471 ret = sys_personality(personality);
472 if (ret == PER_LINUX32)
477 /* ustat compatibility */
479 compat_daddr_t f_tfree;
480 compat_ino_t f_tinode;
485 extern asmlinkage long sys_ustat(dev_t dev, struct ustat __user * ubuf);
487 asmlinkage int sys32_ustat(dev_t dev, struct ustat32 __user * ubuf32)
491 struct ustat32 tmp32;
492 mm_segment_t old_fs = get_fs();
495 err = sys_ustat(dev, (struct ustat __user *)&tmp);
501 memset(&tmp32,0,sizeof(struct ustat32));
502 tmp32.f_tfree = tmp.f_tfree;
503 tmp32.f_tinode = tmp.f_tinode;
505 err = copy_to_user(ubuf32,&tmp32,sizeof(struct ustat32)) ? -EFAULT : 0;
511 asmlinkage int sys32_sendfile(int out_fd, int in_fd, compat_off_t __user *offset,
514 mm_segment_t old_fs = get_fs();
518 if (offset && get_user(of, offset))
522 ret = sys_sendfile(out_fd, in_fd, offset ? (off_t __user *)&of : NULL, count);
525 if (offset && put_user(of, offset))
531 asmlinkage ssize_t sys32_readahead(int fd, u32 pad0, u64 a2, u64 a3,
534 return sys_readahead(fd, merge_64(a2, a3), count);
537 asmlinkage long sys32_sync_file_range(int fd, int __pad,
538 unsigned long a2, unsigned long a3,
539 unsigned long a4, unsigned long a5,
542 return sys_sync_file_range(fd,
543 merge_64(a2, a3), merge_64(a4, a5),
547 save_static_function(sys32_clone);
548 __attribute_used__ noinline static int
549 _sys32_clone(nabi_no_regargs struct pt_regs regs)
551 unsigned long clone_flags;
553 int __user *parent_tidptr, *child_tidptr;
555 clone_flags = regs.regs[4];
556 newsp = regs.regs[5];
558 newsp = regs.regs[29];
559 parent_tidptr = (int __user *) regs.regs[6];
561 /* Use __dummy4 instead of getting it off the stack, so that
563 child_tidptr = (int __user *) __dummy4;
564 return do_fork(clone_flags, newsp, ®s, 0,
565 parent_tidptr, child_tidptr);
569 * Implement the event wait interface for the eventpoll file. It is the kernel
570 * part of the user space epoll_pwait(2).
572 asmlinkage long compat_sys_epoll_pwait(int epfd,
573 struct epoll_event __user *events, int maxevents, int timeout,
574 const compat_sigset_t __user *sigmask, size_t sigsetsize)
577 sigset_t ksigmask, sigsaved;
580 * If the caller wants a certain signal mask to be set during the wait,
584 if (sigsetsize != sizeof(sigset_t))
586 if (!access_ok(VERIFY_READ, sigmask, sizeof(ksigmask)))
588 if (__copy_conv_sigset_from_user(&ksigmask, sigmask))
590 sigdelsetmask(&ksigmask, sigmask(SIGKILL) | sigmask(SIGSTOP));
591 sigprocmask(SIG_SETMASK, &ksigmask, &sigsaved);
594 error = sys_epoll_wait(epfd, events, maxevents, timeout);
597 * If we changed the signal mask, we need to restore the original one.
598 * In case we've got a signal while waiting, we do not restore the
599 * signal mask yet, and we allow do_signal() to deliver the signal on
600 * the way back to userspace, before the signal mask is restored.
603 if (error == -EINTR) {
604 memcpy(¤t->saved_sigmask, &sigsaved,
606 set_thread_flag(TIF_RESTORE_SIGMASK);
608 sigprocmask(SIG_SETMASK, &sigsaved, NULL);