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 SYSCALL_DEFINE6(32_mmap2
, unsigned long, addr
, unsigned long, len
,
67 unsigned long, prot
, unsigned long, flags
, unsigned long, fd
,
73 if (pgoff
& (~PAGE_MASK
>> 12))
75 error
= sys_mmap_pgoff(addr
, len
, prot
, flags
, fd
,
76 pgoff
>> (PAGE_SHIFT
-12));
82 * sys_execve() executes a new program.
84 asmlinkage
int sys32_execve(nabi_no_regargs
struct pt_regs regs
)
89 filename
= getname(compat_ptr(regs
.regs
[4]));
90 error
= PTR_ERR(filename
);
93 error
= compat_do_execve(filename
, compat_ptr(regs
.regs
[5]),
94 compat_ptr(regs
.regs
[6]), ®s
);
101 #define RLIM_INFINITY32 0x7fffffff
102 #define RESOURCE32(x) ((x > RLIM_INFINITY32) ? RLIM_INFINITY32 : x)
109 SYSCALL_DEFINE4(32_truncate64
, const char __user
*, path
,
110 unsigned long, __dummy
, unsigned long, a2
, unsigned long, a3
)
112 return sys_truncate(path
, merge_64(a2
, a3
));
115 SYSCALL_DEFINE4(32_ftruncate64
, unsigned long, fd
, unsigned long, __dummy
,
116 unsigned long, a2
, unsigned long, a3
)
118 return sys_ftruncate(fd
, merge_64(a2
, a3
));
121 SYSCALL_DEFINE5(32_llseek
, unsigned int, fd
, unsigned int, offset_high
,
122 unsigned int, offset_low
, loff_t __user
*, result
,
123 unsigned int, origin
)
125 return sys_llseek(fd
, offset_high
, offset_low
, result
, origin
);
128 /* From the Single Unix Spec: pread & pwrite act like lseek to pos + op +
129 lseek back to original location. They fail just like lseek does on
130 non-seekable files. */
132 SYSCALL_DEFINE6(32_pread
, unsigned long, fd
, char __user
*, buf
, size_t, count
,
133 unsigned long, unused
, unsigned long, a4
, unsigned long, a5
)
135 return sys_pread64(fd
, buf
, count
, merge_64(a4
, a5
));
138 SYSCALL_DEFINE6(32_pwrite
, unsigned int, fd
, const char __user
*, buf
,
139 size_t, count
, u32
, unused
, u64
, a4
, u64
, a5
)
141 return sys_pwrite64(fd
, buf
, count
, merge_64(a4
, a5
));
144 SYSCALL_DEFINE2(32_sched_rr_get_interval
, compat_pid_t
, pid
,
145 struct compat_timespec __user
*, interval
)
149 mm_segment_t old_fs
= get_fs();
152 ret
= sys_sched_rr_get_interval(pid
, (struct timespec __user
*)&t
);
154 if (put_user (t
.tv_sec
, &interval
->tv_sec
) ||
155 __put_user(t
.tv_nsec
, &interval
->tv_nsec
))
160 #ifdef CONFIG_SYSVIPC
162 SYSCALL_DEFINE6(32_ipc
, u32
, call
, long, first
, long, second
, long, third
,
163 unsigned long, ptr
, unsigned long, fifth
)
167 version
= call
>> 16; /* hack for backward compatibility */
172 /* struct sembuf is the same on 32 and 64bit :)) */
173 err
= sys_semtimedop(first
, compat_ptr(ptr
), second
, NULL
);
176 err
= compat_sys_semtimedop(first
, compat_ptr(ptr
), second
,
180 err
= sys_semget(first
, second
, third
);
183 err
= compat_sys_semctl(first
, second
, third
, compat_ptr(ptr
));
186 err
= compat_sys_msgsnd(first
, second
, third
, compat_ptr(ptr
));
189 err
= compat_sys_msgrcv(first
, second
, fifth
, third
,
190 version
, compat_ptr(ptr
));
193 err
= sys_msgget((key_t
) first
, second
);
196 err
= compat_sys_msgctl(first
, second
, compat_ptr(ptr
));
199 err
= compat_sys_shmat(first
, second
, third
, version
,
203 err
= sys_shmdt(compat_ptr(ptr
));
206 err
= sys_shmget(first
, (unsigned)second
, third
);
209 err
= compat_sys_shmctl(first
, second
, compat_ptr(ptr
));
221 SYSCALL_DEFINE6(32_ipc
, u32
, call
, int, first
, int, second
, int, third
,
222 u32
, ptr
, u32
, fifth
)
227 #endif /* CONFIG_SYSVIPC */
229 #ifdef CONFIG_MIPS32_N32
230 SYSCALL_DEFINE4(n32_semctl
, int, semid
, int, semnum
, int, cmd
, u32
, arg
)
232 /* compat_sys_semctl expects a pointer to union semun */
233 u32 __user
*uptr
= compat_alloc_user_space(sizeof(u32
));
234 if (put_user(arg
, uptr
))
236 return compat_sys_semctl(semid
, semnum
, cmd
, uptr
);
239 SYSCALL_DEFINE4(n32_msgsnd
, int, msqid
, u32
, msgp
, unsigned int, msgsz
,
242 return compat_sys_msgsnd(msqid
, msgsz
, msgflg
, compat_ptr(msgp
));
245 SYSCALL_DEFINE5(n32_msgrcv
, int, msqid
, u32
, msgp
, size_t, msgsz
,
246 int, msgtyp
, int, msgflg
)
248 return compat_sys_msgrcv(msqid
, msgsz
, msgtyp
, msgflg
, IPC_64
,
257 compat_caddr_t oldval
;
258 compat_caddr_t oldlenp
;
259 compat_caddr_t newval
;
260 compat_size_t newlen
;
261 unsigned int __unused
[4];
264 #ifdef CONFIG_SYSCTL_SYSCALL
266 SYSCALL_DEFINE1(32_sysctl
, struct sysctl_args32 __user
*, args
)
268 struct sysctl_args32 tmp
;
271 size_t __user
*oldlenp
= NULL
;
272 unsigned long addr
= (((unsigned long)&args
->__unused
[0]) + 7) & ~7;
274 if (copy_from_user(&tmp
, args
, sizeof(tmp
)))
277 if (tmp
.oldval
&& tmp
.oldlenp
) {
278 /* Duh, this is ugly and might not work if sysctl_args
279 is in read-only memory, but do_sysctl does indirectly
280 a lot of uaccess in both directions and we'd have to
281 basically copy the whole sysctl.c here, and
282 glibc's __sysctl uses rw memory for the structure
284 if (get_user(oldlen
, (u32 __user
*)A(tmp
.oldlenp
)) ||
285 put_user(oldlen
, (size_t __user
*)addr
))
287 oldlenp
= (size_t __user
*)addr
;
291 error
= do_sysctl((int __user
*)A(tmp
.name
), tmp
.nlen
, (void __user
*)A(tmp
.oldval
),
292 oldlenp
, (void __user
*)A(tmp
.newval
), tmp
.newlen
);
296 if (get_user(oldlen
, (size_t __user
*)addr
) ||
297 put_user(oldlen
, (u32 __user
*)A(tmp
.oldlenp
)))
300 copy_to_user(args
->__unused
, tmp
.__unused
, sizeof(tmp
.__unused
));
307 SYSCALL_DEFINE1(32_sysctl
, struct sysctl_args32 __user
*, args
)
312 #endif /* CONFIG_SYSCTL_SYSCALL */
314 SYSCALL_DEFINE1(32_newuname
, struct new_utsname __user
*, name
)
319 if (copy_to_user(name
, utsname(), sizeof *name
))
323 if (current
->personality
== PER_LINUX32
&& !ret
)
324 if (copy_to_user(name
->machine
, "mips\0\0\0", 8))
330 SYSCALL_DEFINE1(32_personality
, unsigned long, personality
)
333 personality
&= 0xffffffff;
334 if (personality(current
->personality
) == PER_LINUX32
&&
335 personality
== PER_LINUX
)
336 personality
= PER_LINUX32
;
337 ret
= sys_personality(personality
);
338 if (ret
== PER_LINUX32
)
343 SYSCALL_DEFINE4(32_sendfile
, long, out_fd
, long, in_fd
,
344 compat_off_t __user
*, offset
, s32
, count
)
346 mm_segment_t old_fs
= get_fs();
350 if (offset
&& get_user(of
, offset
))
354 ret
= sys_sendfile(out_fd
, in_fd
, offset
? (off_t __user
*)&of
: NULL
, count
);
357 if (offset
&& put_user(of
, offset
))
363 asmlinkage ssize_t
sys32_readahead(int fd
, u32 pad0
, u64 a2
, u64 a3
,
366 return sys_readahead(fd
, merge_64(a2
, a3
), count
);
369 asmlinkage
long sys32_sync_file_range(int fd
, int __pad
,
370 unsigned long a2
, unsigned long a3
,
371 unsigned long a4
, unsigned long a5
,
374 return sys_sync_file_range(fd
,
375 merge_64(a2
, a3
), merge_64(a4
, a5
),
379 asmlinkage
long sys32_fadvise64_64(int fd
, int __pad
,
380 unsigned long a2
, unsigned long a3
,
381 unsigned long a4
, unsigned long a5
,
384 return sys_fadvise64_64(fd
,
385 merge_64(a2
, a3
), merge_64(a4
, a5
),
389 asmlinkage
long sys32_fallocate(int fd
, int mode
, unsigned offset_a2
,
390 unsigned offset_a3
, unsigned len_a4
, unsigned len_a5
)
392 return sys_fallocate(fd
, mode
, merge_64(offset_a2
, offset_a3
),
393 merge_64(len_a4
, len_a5
));
396 save_static_function(sys32_clone
);
397 static int noinline __used
398 _sys32_clone(nabi_no_regargs
struct pt_regs regs
)
400 unsigned long clone_flags
;
402 int __user
*parent_tidptr
, *child_tidptr
;
404 clone_flags
= regs
.regs
[4];
405 newsp
= regs
.regs
[5];
407 newsp
= regs
.regs
[29];
408 parent_tidptr
= (int __user
*) regs
.regs
[6];
410 /* Use __dummy4 instead of getting it off the stack, so that
412 child_tidptr
= (int __user
*) __dummy4
;
413 return do_fork(clone_flags
, newsp
, ®s
, 0,
414 parent_tidptr
, child_tidptr
);
417 asmlinkage
long sys32_lookup_dcookie(u32 a0
, u32 a1
, char __user
*buf
,
420 return sys_lookup_dcookie(merge_64(a0
, a1
), buf
, len
);