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))
66 asmlinkage unsigned long
67 sys32_mmap2(unsigned long addr, unsigned long len, unsigned long prot,
68 unsigned long flags, unsigned long fd, unsigned long pgoff)
70 struct file * file = NULL;
74 if (pgoff & (~PAGE_MASK >> 12))
76 pgoff >>= PAGE_SHIFT-12;
78 if (!(flags & MAP_ANONYMOUS)) {
84 flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE);
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);
97 * sys_execve() executes a new program.
99 asmlinkage int sys32_execve(nabi_no_regargs struct pt_regs regs)
104 filename = getname(compat_ptr(regs.regs[4]));
105 error = PTR_ERR(filename);
106 if (IS_ERR(filename))
108 error = compat_do_execve(filename, compat_ptr(regs.regs[5]),
109 compat_ptr(regs.regs[6]), ®s);
116 #define RLIM_INFINITY32 0x7fffffff
117 #define RESOURCE32(x) ((x > RLIM_INFINITY32) ? RLIM_INFINITY32 : x)
124 asmlinkage long sys32_truncate64(const char __user * path,
125 unsigned long __dummy, int a2, int a3)
127 return sys_truncate(path, merge_64(a2, a3));
130 asmlinkage long sys32_ftruncate64(unsigned int fd, unsigned long __dummy,
133 return sys_ftruncate(fd, merge_64(a2, a3));
137 get_tv32(struct timeval *o, struct compat_timeval __user *i)
139 return (!access_ok(VERIFY_READ, i, sizeof(*i)) ||
140 (__get_user(o->tv_sec, &i->tv_sec) |
141 __get_user(o->tv_usec, &i->tv_usec)));
145 put_tv32(struct compat_timeval __user *o, struct timeval *i)
147 return (!access_ok(VERIFY_WRITE, o, sizeof(*o)) ||
148 (__put_user(i->tv_sec, &o->tv_sec) |
149 __put_user(i->tv_usec, &o->tv_usec)));
152 extern struct timezone sys_tz;
155 sys32_gettimeofday(struct compat_timeval __user *tv, struct timezone __user *tz)
159 do_gettimeofday(&ktv);
160 if (put_tv32(tv, &ktv))
164 if (copy_to_user(tz, &sys_tz, sizeof(sys_tz)))
170 static inline long get_ts32(struct timespec *o, struct compat_timeval __user *i)
174 if (!access_ok(VERIFY_READ, i, sizeof(*i)))
176 if (__get_user(o->tv_sec, &i->tv_sec))
178 if (__get_user(usec, &i->tv_usec))
180 o->tv_nsec = usec * 1000;
185 sys32_settimeofday(struct compat_timeval __user *tv, struct timezone __user *tz)
191 if (get_ts32(&kts, tv))
195 if (copy_from_user(&ktz, tz, sizeof(ktz)))
199 return do_sys_settimeofday(tv ? &kts : NULL, tz ? &ktz : NULL);
202 asmlinkage int sys32_llseek(unsigned int fd, unsigned int offset_high,
203 unsigned int offset_low, loff_t __user * result,
206 return sys_llseek(fd, offset_high, offset_low, result, origin);
209 /* From the Single Unix Spec: pread & pwrite act like lseek to pos + op +
210 lseek back to original location. They fail just like lseek does on
211 non-seekable files. */
213 asmlinkage ssize_t sys32_pread(unsigned int fd, char __user * buf,
214 size_t count, u32 unused, u64 a4, u64 a5)
216 return sys_pread64(fd, buf, count, merge_64(a4, a5));
219 asmlinkage ssize_t sys32_pwrite(unsigned int fd, const char __user * buf,
220 size_t count, u32 unused, u64 a4, u64 a5)
222 return sys_pwrite64(fd, buf, count, merge_64(a4, a5));
225 asmlinkage int sys32_sched_rr_get_interval(compat_pid_t pid,
226 struct compat_timespec __user *interval)
230 mm_segment_t old_fs = get_fs();
233 ret = sys_sched_rr_get_interval(pid, (struct timespec __user *)&t);
235 if (put_user (t.tv_sec, &interval->tv_sec) ||
236 __put_user(t.tv_nsec, &interval->tv_nsec))
241 #ifdef CONFIG_SYSVIPC
244 sys32_ipc(u32 call, int first, int second, int third, u32 ptr, u32 fifth)
248 version = call >> 16; /* hack for backward compatibility */
253 /* struct sembuf is the same on 32 and 64bit :)) */
254 err = sys_semtimedop(first, compat_ptr(ptr), second, NULL);
257 err = compat_sys_semtimedop(first, compat_ptr(ptr), second,
261 err = sys_semget(first, second, third);
264 err = compat_sys_semctl(first, second, third, compat_ptr(ptr));
267 err = compat_sys_msgsnd(first, second, third, compat_ptr(ptr));
270 err = compat_sys_msgrcv(first, second, fifth, third,
271 version, compat_ptr(ptr));
274 err = sys_msgget((key_t) first, second);
277 err = compat_sys_msgctl(first, second, compat_ptr(ptr));
280 err = compat_sys_shmat(first, second, third, version,
284 err = sys_shmdt(compat_ptr(ptr));
287 err = sys_shmget(first, (unsigned)second, third);
290 err = compat_sys_shmctl(first, second, compat_ptr(ptr));
303 sys32_ipc(u32 call, int first, int second, int third, u32 ptr, u32 fifth)
308 #endif /* CONFIG_SYSVIPC */
310 #ifdef CONFIG_MIPS32_N32
311 asmlinkage long sysn32_semctl(int semid, int semnum, int cmd, u32 arg)
313 /* compat_sys_semctl expects a pointer to union semun */
314 u32 __user *uptr = compat_alloc_user_space(sizeof(u32));
315 if (put_user(arg, uptr))
317 return compat_sys_semctl(semid, semnum, cmd, uptr);
320 asmlinkage long sysn32_msgsnd(int msqid, u32 msgp, unsigned msgsz, int msgflg)
322 return compat_sys_msgsnd(msqid, msgsz, msgflg, compat_ptr(msgp));
325 asmlinkage long sysn32_msgrcv(int msqid, u32 msgp, size_t msgsz, int msgtyp,
328 return compat_sys_msgrcv(msqid, msgsz, msgtyp, msgflg, IPC_64,
337 compat_caddr_t oldval;
338 compat_caddr_t oldlenp;
339 compat_caddr_t newval;
340 compat_size_t newlen;
341 unsigned int __unused[4];
344 #ifdef CONFIG_SYSCTL_SYSCALL
346 asmlinkage long sys32_sysctl(struct sysctl_args32 __user *args)
348 struct sysctl_args32 tmp;
351 size_t __user *oldlenp = NULL;
352 unsigned long addr = (((unsigned long)&args->__unused[0]) + 7) & ~7;
354 if (copy_from_user(&tmp, args, sizeof(tmp)))
357 if (tmp.oldval && tmp.oldlenp) {
358 /* Duh, this is ugly and might not work if sysctl_args
359 is in read-only memory, but do_sysctl does indirectly
360 a lot of uaccess in both directions and we'd have to
361 basically copy the whole sysctl.c here, and
362 glibc's __sysctl uses rw memory for the structure
364 if (get_user(oldlen, (u32 __user *)A(tmp.oldlenp)) ||
365 put_user(oldlen, (size_t __user *)addr))
367 oldlenp = (size_t __user *)addr;
371 error = do_sysctl((int __user *)A(tmp.name), tmp.nlen, (void __user *)A(tmp.oldval),
372 oldlenp, (void __user *)A(tmp.newval), tmp.newlen);
376 if (get_user(oldlen, (size_t __user *)addr) ||
377 put_user(oldlen, (u32 __user *)A(tmp.oldlenp)))
380 copy_to_user(args->__unused, tmp.__unused, sizeof(tmp.__unused));
385 #endif /* CONFIG_SYSCTL_SYSCALL */
387 asmlinkage long sys32_newuname(struct new_utsname __user * name)
392 if (copy_to_user(name, utsname(), sizeof *name))
396 if (current->personality == PER_LINUX32 && !ret)
397 if (copy_to_user(name->machine, "mips\0\0\0", 8))
403 asmlinkage int sys32_personality(unsigned long personality)
406 personality &= 0xffffffff;
407 if (personality(current->personality) == PER_LINUX32 &&
408 personality == PER_LINUX)
409 personality = PER_LINUX32;
410 ret = sys_personality(personality);
411 if (ret == PER_LINUX32)
416 /* ustat compatibility */
418 compat_daddr_t f_tfree;
419 compat_ino_t f_tinode;
424 extern asmlinkage long sys_ustat(dev_t dev, struct ustat __user * ubuf);
426 asmlinkage int sys32_ustat(dev_t dev, struct ustat32 __user * ubuf32)
430 struct ustat32 tmp32;
431 mm_segment_t old_fs = get_fs();
434 err = sys_ustat(dev, (struct ustat __user *)&tmp);
440 memset(&tmp32, 0, sizeof(struct ustat32));
441 tmp32.f_tfree = tmp.f_tfree;
442 tmp32.f_tinode = tmp.f_tinode;
444 err = copy_to_user(ubuf32, &tmp32, sizeof(struct ustat32)) ? -EFAULT : 0;
450 asmlinkage int sys32_sendfile(int out_fd, int in_fd, compat_off_t __user *offset,
453 mm_segment_t old_fs = get_fs();
457 if (offset && get_user(of, offset))
461 ret = sys_sendfile(out_fd, in_fd, offset ? (off_t __user *)&of : NULL, count);
464 if (offset && put_user(of, offset))
470 asmlinkage ssize_t sys32_readahead(int fd, u32 pad0, u64 a2, u64 a3,
473 return sys_readahead(fd, merge_64(a2, a3), count);
476 asmlinkage long sys32_sync_file_range(int fd, int __pad,
477 unsigned long a2, unsigned long a3,
478 unsigned long a4, unsigned long a5,
481 return sys_sync_file_range(fd,
482 merge_64(a2, a3), merge_64(a4, a5),
486 asmlinkage long sys32_fadvise64_64(int fd, int __pad,
487 unsigned long a2, unsigned long a3,
488 unsigned long a4, unsigned long a5,
491 return sys_fadvise64_64(fd,
492 merge_64(a2, a3), merge_64(a4, a5),
496 asmlinkage long sys32_fallocate(int fd, int mode, unsigned offset_a2,
497 unsigned offset_a3, unsigned len_a4, unsigned len_a5)
499 return sys_fallocate(fd, mode, merge_64(offset_a2, offset_a3),
500 merge_64(len_a4, len_a5));
503 save_static_function(sys32_clone);
504 static int noinline __used
505 _sys32_clone(nabi_no_regargs struct pt_regs regs)
507 unsigned long clone_flags;
509 int __user *parent_tidptr, *child_tidptr;
511 clone_flags = regs.regs[4];
512 newsp = regs.regs[5];
514 newsp = regs.regs[29];
515 parent_tidptr = (int __user *) regs.regs[6];
517 /* Use __dummy4 instead of getting it off the stack, so that
519 child_tidptr = (int __user *) __dummy4;
520 return do_fork(clone_flags, newsp, ®s, 0,
521 parent_tidptr, child_tidptr);