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/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>
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>
37 #include <linux/ipc.h>
42 #include <asm/compat-signal.h>
44 #include <asm/uaccess.h>
45 #include <asm/mmu_context.h>
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.
56 #define A(__x) ((unsigned long)(__x))
57 #define AA(__x) ((unsigned long)((int)__x))
60 #define merge_64(r1, r2) ((((r1) & 0xffffffffUL) << 32) + ((r2) & 0xffffffffUL))
63 #define merge_64(r1, r2) ((((r2) & 0xffffffffUL) << 32) + ((r1) & 0xffffffffUL))
67 * Revalidate the inode. This is required for proper NFS attribute caching.
70 int cp_compat_stat(struct kstat *stat, struct compat_stat __user *statbuf)
72 struct compat_stat tmp;
74 if (!new_valid_dev(stat->dev) || !new_valid_dev(stat->rdev))
77 memset(&tmp, 0, sizeof(tmp));
78 tmp.st_dev = new_encode_dev(stat->dev);
79 tmp.st_ino = stat->ino;
80 if (sizeof(tmp.st_ino) < sizeof(stat->ino) && tmp.st_ino != stat->ino)
82 tmp.st_mode = stat->mode;
83 tmp.st_nlink = stat->nlink;
84 SET_UID(tmp.st_uid, stat->uid);
85 SET_GID(tmp.st_gid, stat->gid);
86 tmp.st_rdev = new_encode_dev(stat->rdev);
87 tmp.st_size = stat->size;
88 tmp.st_atime = stat->atime.tv_sec;
89 tmp.st_mtime = stat->mtime.tv_sec;
90 tmp.st_ctime = stat->ctime.tv_sec;
92 tmp.st_atime_nsec = stat->atime.tv_nsec;
93 tmp.st_mtime_nsec = stat->mtime.tv_nsec;
94 tmp.st_ctime_nsec = stat->ctime.tv_nsec;
96 tmp.st_blocks = stat->blocks;
97 tmp.st_blksize = stat->blksize;
98 return copy_to_user(statbuf, &tmp, sizeof(tmp)) ? -EFAULT : 0;
101 asmlinkage unsigned long
102 sys32_mmap2(unsigned long addr, unsigned long len, unsigned long prot,
103 unsigned long flags, unsigned long fd, unsigned long pgoff)
105 struct file * file = NULL;
109 if (pgoff & (~PAGE_MASK >> 12))
111 pgoff >>= PAGE_SHIFT-12;
113 if (!(flags & MAP_ANONYMOUS)) {
119 flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE);
121 down_write(¤t->mm->mmap_sem);
122 error = do_mmap_pgoff(file, addr, len, prot, flags, pgoff);
123 up_write(¤t->mm->mmap_sem);
132 * sys_execve() executes a new program.
134 asmlinkage int sys32_execve(nabi_no_regargs struct pt_regs regs)
139 filename = getname(compat_ptr(regs.regs[4]));
140 error = PTR_ERR(filename);
141 if (IS_ERR(filename))
143 error = compat_do_execve(filename, compat_ptr(regs.regs[5]),
144 compat_ptr(regs.regs[6]), ®s);
151 #define RLIM_INFINITY32 0x7fffffff
152 #define RESOURCE32(x) ((x > RLIM_INFINITY32) ? RLIM_INFINITY32 : x)
159 asmlinkage long sys32_truncate64(const char __user * path,
160 unsigned long __dummy, int a2, int a3)
162 return sys_truncate(path, merge_64(a2, a3));
165 asmlinkage long sys32_ftruncate64(unsigned int fd, unsigned long __dummy,
168 return sys_ftruncate(fd, merge_64(a2, a3));
172 get_tv32(struct timeval *o, struct compat_timeval __user *i)
174 return (!access_ok(VERIFY_READ, i, sizeof(*i)) ||
175 (__get_user(o->tv_sec, &i->tv_sec) |
176 __get_user(o->tv_usec, &i->tv_usec)));
180 put_tv32(struct compat_timeval __user *o, struct timeval *i)
182 return (!access_ok(VERIFY_WRITE, o, sizeof(*o)) ||
183 (__put_user(i->tv_sec, &o->tv_sec) |
184 __put_user(i->tv_usec, &o->tv_usec)));
187 extern struct timezone sys_tz;
190 sys32_gettimeofday(struct compat_timeval __user *tv, struct timezone __user *tz)
194 do_gettimeofday(&ktv);
195 if (put_tv32(tv, &ktv))
199 if (copy_to_user(tz, &sys_tz, sizeof(sys_tz)))
205 static inline long get_ts32(struct timespec *o, struct compat_timeval __user *i)
209 if (!access_ok(VERIFY_READ, i, sizeof(*i)))
211 if (__get_user(o->tv_sec, &i->tv_sec))
213 if (__get_user(usec, &i->tv_usec))
215 o->tv_nsec = usec * 1000;
220 sys32_settimeofday(struct compat_timeval __user *tv, struct timezone __user *tz)
226 if (get_ts32(&kts, tv))
230 if (copy_from_user(&ktz, tz, sizeof(ktz)))
234 return do_sys_settimeofday(tv ? &kts : NULL, tz ? &ktz : NULL);
237 asmlinkage int sys32_llseek(unsigned int fd, unsigned int offset_high,
238 unsigned int offset_low, loff_t __user * result,
241 return sys_llseek(fd, offset_high, offset_low, result, origin);
244 /* From the Single Unix Spec: pread & pwrite act like lseek to pos + op +
245 lseek back to original location. They fail just like lseek does on
246 non-seekable files. */
248 asmlinkage ssize_t sys32_pread(unsigned int fd, char __user * buf,
249 size_t count, u32 unused, u64 a4, u64 a5)
251 return sys_pread64(fd, buf, count, merge_64(a4, a5));
254 asmlinkage ssize_t sys32_pwrite(unsigned int fd, const char __user * buf,
255 size_t count, u32 unused, u64 a4, u64 a5)
257 return sys_pwrite64(fd, buf, count, merge_64(a4, a5));
260 asmlinkage int sys32_sched_rr_get_interval(compat_pid_t pid,
261 struct compat_timespec __user *interval)
265 mm_segment_t old_fs = get_fs();
268 ret = sys_sched_rr_get_interval(pid, (struct timespec __user *)&t);
270 if (put_user (t.tv_sec, &interval->tv_sec) ||
271 __put_user(t.tv_nsec, &interval->tv_nsec))
276 #ifdef CONFIG_SYSVIPC
279 sys32_ipc(u32 call, int first, int second, int third, u32 ptr, u32 fifth)
283 version = call >> 16; /* hack for backward compatibility */
288 /* struct sembuf is the same on 32 and 64bit :)) */
289 err = sys_semtimedop(first, compat_ptr(ptr), second, NULL);
292 err = compat_sys_semtimedop(first, compat_ptr(ptr), second,
296 err = sys_semget(first, second, third);
299 err = compat_sys_semctl(first, second, third, compat_ptr(ptr));
302 err = compat_sys_msgsnd(first, second, third, compat_ptr(ptr));
305 err = compat_sys_msgrcv(first, second, fifth, third,
306 version, compat_ptr(ptr));
309 err = sys_msgget((key_t) first, second);
312 err = compat_sys_msgctl(first, second, compat_ptr(ptr));
315 err = compat_sys_shmat(first, second, third, version,
319 err = sys_shmdt(compat_ptr(ptr));
322 err = sys_shmget(first, (unsigned)second, third);
325 err = compat_sys_shmctl(first, second, compat_ptr(ptr));
338 sys32_ipc(u32 call, int first, int second, int third, u32 ptr, u32 fifth)
343 #endif /* CONFIG_SYSVIPC */
345 #ifdef CONFIG_MIPS32_N32
346 asmlinkage long sysn32_semctl(int semid, int semnum, int cmd, u32 arg)
348 /* compat_sys_semctl expects a pointer to union semun */
349 u32 __user *uptr = compat_alloc_user_space(sizeof(u32));
350 if (put_user(arg, uptr))
352 return compat_sys_semctl(semid, semnum, cmd, uptr);
355 asmlinkage long sysn32_msgsnd(int msqid, u32 msgp, unsigned msgsz, int msgflg)
357 return compat_sys_msgsnd(msqid, msgsz, msgflg, compat_ptr(msgp));
360 asmlinkage long sysn32_msgrcv(int msqid, u32 msgp, size_t msgsz, int msgtyp,
363 return compat_sys_msgrcv(msqid, msgsz, msgtyp, msgflg, IPC_64,
372 compat_caddr_t oldval;
373 compat_caddr_t oldlenp;
374 compat_caddr_t newval;
375 compat_size_t newlen;
376 unsigned int __unused[4];
379 #ifdef CONFIG_SYSCTL_SYSCALL
381 asmlinkage long sys32_sysctl(struct sysctl_args32 __user *args)
383 struct sysctl_args32 tmp;
386 size_t __user *oldlenp = NULL;
387 unsigned long addr = (((unsigned long)&args->__unused[0]) + 7) & ~7;
389 if (copy_from_user(&tmp, args, sizeof(tmp)))
392 if (tmp.oldval && tmp.oldlenp) {
393 /* Duh, this is ugly and might not work if sysctl_args
394 is in read-only memory, but do_sysctl does indirectly
395 a lot of uaccess in both directions and we'd have to
396 basically copy the whole sysctl.c here, and
397 glibc's __sysctl uses rw memory for the structure
399 if (get_user(oldlen, (u32 __user *)A(tmp.oldlenp)) ||
400 put_user(oldlen, (size_t __user *)addr))
402 oldlenp = (size_t __user *)addr;
406 error = do_sysctl((int __user *)A(tmp.name), tmp.nlen, (void __user *)A(tmp.oldval),
407 oldlenp, (void __user *)A(tmp.newval), tmp.newlen);
411 if (get_user(oldlen, (size_t __user *)addr) ||
412 put_user(oldlen, (u32 __user *)A(tmp.oldlenp)))
415 copy_to_user(args->__unused, tmp.__unused, sizeof(tmp.__unused));
420 #endif /* CONFIG_SYSCTL_SYSCALL */
422 asmlinkage long sys32_newuname(struct new_utsname __user * name)
427 if (copy_to_user(name, utsname(), sizeof *name))
431 if (current->personality == PER_LINUX32 && !ret)
432 if (copy_to_user(name->machine, "mips\0\0\0", 8))
438 asmlinkage int sys32_personality(unsigned long personality)
441 personality &= 0xffffffff;
442 if (personality(current->personality) == PER_LINUX32 &&
443 personality == PER_LINUX)
444 personality = PER_LINUX32;
445 ret = sys_personality(personality);
446 if (ret == PER_LINUX32)
451 /* ustat compatibility */
453 compat_daddr_t f_tfree;
454 compat_ino_t f_tinode;
459 extern asmlinkage long sys_ustat(dev_t dev, struct ustat __user * ubuf);
461 asmlinkage int sys32_ustat(dev_t dev, struct ustat32 __user * ubuf32)
465 struct ustat32 tmp32;
466 mm_segment_t old_fs = get_fs();
469 err = sys_ustat(dev, (struct ustat __user *)&tmp);
475 memset(&tmp32, 0, sizeof(struct ustat32));
476 tmp32.f_tfree = tmp.f_tfree;
477 tmp32.f_tinode = tmp.f_tinode;
479 err = copy_to_user(ubuf32, &tmp32, sizeof(struct ustat32)) ? -EFAULT : 0;
485 asmlinkage int sys32_sendfile(int out_fd, int in_fd, compat_off_t __user *offset,
488 mm_segment_t old_fs = get_fs();
492 if (offset && get_user(of, offset))
496 ret = sys_sendfile(out_fd, in_fd, offset ? (off_t __user *)&of : NULL, count);
499 if (offset && put_user(of, offset))
505 asmlinkage ssize_t sys32_readahead(int fd, u32 pad0, u64 a2, u64 a3,
508 return sys_readahead(fd, merge_64(a2, a3), count);
511 asmlinkage long sys32_sync_file_range(int fd, int __pad,
512 unsigned long a2, unsigned long a3,
513 unsigned long a4, unsigned long a5,
516 return sys_sync_file_range(fd,
517 merge_64(a2, a3), merge_64(a4, a5),
521 asmlinkage long sys32_fadvise64_64(int fd, int __pad,
522 unsigned long a2, unsigned long a3,
523 unsigned long a4, unsigned long a5,
526 return sys_fadvise64_64(fd,
527 merge_64(a2, a3), merge_64(a4, a5),
531 asmlinkage long sys32_fallocate(int fd, int mode, unsigned offset_a2,
532 unsigned offset_a3, unsigned len_a4, unsigned len_a5)
534 return sys_fallocate(fd, mode, merge_64(offset_a2, offset_a3),
535 merge_64(len_a4, len_a5));
538 save_static_function(sys32_clone);
539 static int noinline __used
540 _sys32_clone(nabi_no_regargs struct pt_regs regs)
542 unsigned long clone_flags;
544 int __user *parent_tidptr, *child_tidptr;
546 clone_flags = regs.regs[4];
547 newsp = regs.regs[5];
549 newsp = regs.regs[29];
550 parent_tidptr = (int __user *) regs.regs[6];
552 /* Use __dummy4 instead of getting it off the stack, so that
554 child_tidptr = (int __user *) __dummy4;
555 return do_fork(clone_flags, newsp, ®s, 0,
556 parent_tidptr, child_tidptr);