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/syscalls.h>
36 #include <linux/compat.h>
37 #include <linux/vfs.h>
38 #include <linux/ipc.h>
43 #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))
67 SYSCALL_DEFINE6(32_mmap2, unsigned long, addr, unsigned long, len,
68 unsigned long, prot, unsigned long, flags, unsigned long, fd,
71 struct file * file = NULL;
75 if (pgoff & (~PAGE_MASK >> 12))
77 pgoff >>= PAGE_SHIFT-12;
79 if (!(flags & MAP_ANONYMOUS)) {
85 flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE);
87 down_write(¤t->mm->mmap_sem);
88 error = do_mmap_pgoff(file, addr, len, prot, flags, pgoff);
89 up_write(¤t->mm->mmap_sem);
98 * sys_execve() executes a new program.
100 asmlinkage int sys32_execve(nabi_no_regargs struct pt_regs regs)
105 filename = getname(compat_ptr(regs.regs[4]));
106 error = PTR_ERR(filename);
107 if (IS_ERR(filename))
109 error = compat_do_execve(filename, compat_ptr(regs.regs[5]),
110 compat_ptr(regs.regs[6]), ®s);
117 #define RLIM_INFINITY32 0x7fffffff
118 #define RESOURCE32(x) ((x > RLIM_INFINITY32) ? RLIM_INFINITY32 : x)
125 SYSCALL_DEFINE4(32_truncate64, const char __user *, path,
126 unsigned long, __dummy, unsigned long, a2, unsigned long, a3)
128 return sys_truncate(path, merge_64(a2, a3));
131 SYSCALL_DEFINE4(32_ftruncate64, unsigned long, fd, unsigned long, __dummy,
132 unsigned long, a2, unsigned long, a3)
134 return sys_ftruncate(fd, merge_64(a2, a3));
137 SYSCALL_DEFINE5(32_llseek, unsigned long, fd, unsigned long, offset_high,
138 unsigned long, offset_low, loff_t __user *, result,
139 unsigned long, origin)
141 return sys_llseek(fd, offset_high, offset_low, result, origin);
144 /* From the Single Unix Spec: pread & pwrite act like lseek to pos + op +
145 lseek back to original location. They fail just like lseek does on
146 non-seekable files. */
148 SYSCALL_DEFINE6(32_pread, unsigned long, fd, char __user *, buf, size_t, count,
149 unsigned long, unused, unsigned long, a4, unsigned long, a5)
151 return sys_pread64(fd, buf, count, merge_64(a4, a5));
154 SYSCALL_DEFINE6(32_pwrite, unsigned int, fd, const char __user *, buf,
155 size_t, count, u32, unused, u64, a4, u64, a5)
157 return sys_pwrite64(fd, buf, count, merge_64(a4, a5));
160 SYSCALL_DEFINE2(32_sched_rr_get_interval, compat_pid_t, pid,
161 struct compat_timespec __user *, interval)
165 mm_segment_t old_fs = get_fs();
168 ret = sys_sched_rr_get_interval(pid, (struct timespec __user *)&t);
170 if (put_user (t.tv_sec, &interval->tv_sec) ||
171 __put_user(t.tv_nsec, &interval->tv_nsec))
176 #ifdef CONFIG_SYSVIPC
178 SYSCALL_DEFINE6(32_ipc, u32, call, long, first, long, second, long, third,
179 unsigned long, ptr, unsigned long, fifth)
183 version = call >> 16; /* hack for backward compatibility */
188 /* struct sembuf is the same on 32 and 64bit :)) */
189 err = sys_semtimedop(first, compat_ptr(ptr), second, NULL);
192 err = compat_sys_semtimedop(first, compat_ptr(ptr), second,
196 err = sys_semget(first, second, third);
199 err = compat_sys_semctl(first, second, third, compat_ptr(ptr));
202 err = compat_sys_msgsnd(first, second, third, compat_ptr(ptr));
205 err = compat_sys_msgrcv(first, second, fifth, third,
206 version, compat_ptr(ptr));
209 err = sys_msgget((key_t) first, second);
212 err = compat_sys_msgctl(first, second, compat_ptr(ptr));
215 err = compat_sys_shmat(first, second, third, version,
219 err = sys_shmdt(compat_ptr(ptr));
222 err = sys_shmget(first, (unsigned)second, third);
225 err = compat_sys_shmctl(first, second, compat_ptr(ptr));
237 SYSCALL_DEFINE6(32_ipc, u32, call, int, first, int, second, int, third,
238 u32, ptr, u32, fifth)
243 #endif /* CONFIG_SYSVIPC */
245 #ifdef CONFIG_MIPS32_N32
246 SYSCALL_DEFINE4(n32_semctl, int, semid, int, semnum, int, cmd, u32, arg)
248 /* compat_sys_semctl expects a pointer to union semun */
249 u32 __user *uptr = compat_alloc_user_space(sizeof(u32));
250 if (put_user(arg, uptr))
252 return compat_sys_semctl(semid, semnum, cmd, uptr);
255 SYSCALL_DEFINE4(n32_msgsnd, int, msqid, u32, msgp, unsigned int, msgsz,
258 return compat_sys_msgsnd(msqid, msgsz, msgflg, compat_ptr(msgp));
261 SYSCALL_DEFINE5(n32_msgrcv, int, msqid, u32, msgp, size_t, msgsz,
262 int, msgtyp, int, msgflg)
264 return compat_sys_msgrcv(msqid, msgsz, msgtyp, msgflg, IPC_64,
273 compat_caddr_t oldval;
274 compat_caddr_t oldlenp;
275 compat_caddr_t newval;
276 compat_size_t newlen;
277 unsigned int __unused[4];
280 #ifdef CONFIG_SYSCTL_SYSCALL
282 SYSCALL_DEFINE1(32_sysctl, struct sysctl_args32 __user *, args)
284 struct sysctl_args32 tmp;
287 size_t __user *oldlenp = NULL;
288 unsigned long addr = (((unsigned long)&args->__unused[0]) + 7) & ~7;
290 if (copy_from_user(&tmp, args, sizeof(tmp)))
293 if (tmp.oldval && tmp.oldlenp) {
294 /* Duh, this is ugly and might not work if sysctl_args
295 is in read-only memory, but do_sysctl does indirectly
296 a lot of uaccess in both directions and we'd have to
297 basically copy the whole sysctl.c here, and
298 glibc's __sysctl uses rw memory for the structure
300 if (get_user(oldlen, (u32 __user *)A(tmp.oldlenp)) ||
301 put_user(oldlen, (size_t __user *)addr))
303 oldlenp = (size_t __user *)addr;
307 error = do_sysctl((int __user *)A(tmp.name), tmp.nlen, (void __user *)A(tmp.oldval),
308 oldlenp, (void __user *)A(tmp.newval), tmp.newlen);
312 if (get_user(oldlen, (size_t __user *)addr) ||
313 put_user(oldlen, (u32 __user *)A(tmp.oldlenp)))
316 copy_to_user(args->__unused, tmp.__unused, sizeof(tmp.__unused));
323 SYSCALL_DEFINE1(32_sysctl, struct sysctl_args32 __user *, args)
328 #endif /* CONFIG_SYSCTL_SYSCALL */
330 SYSCALL_DEFINE1(32_newuname, struct new_utsname __user *, name)
335 if (copy_to_user(name, utsname(), sizeof *name))
339 if (current->personality == PER_LINUX32 && !ret)
340 if (copy_to_user(name->machine, "mips\0\0\0", 8))
346 SYSCALL_DEFINE1(32_personality, unsigned long, personality)
349 personality &= 0xffffffff;
350 if (personality(current->personality) == PER_LINUX32 &&
351 personality == PER_LINUX)
352 personality = PER_LINUX32;
353 ret = sys_personality(personality);
354 if (ret == PER_LINUX32)
359 /* ustat compatibility */
361 compat_daddr_t f_tfree;
362 compat_ino_t f_tinode;
367 extern asmlinkage long sys_ustat(dev_t dev, struct ustat __user * ubuf);
369 SYSCALL_DEFINE2(32_ustat, dev_t, dev, struct ustat32 __user *, ubuf32)
373 struct ustat32 tmp32;
374 mm_segment_t old_fs = get_fs();
377 err = sys_ustat(dev, (struct ustat __user *)&tmp);
383 memset(&tmp32, 0, sizeof(struct ustat32));
384 tmp32.f_tfree = tmp.f_tfree;
385 tmp32.f_tinode = tmp.f_tinode;
387 err = copy_to_user(ubuf32, &tmp32, sizeof(struct ustat32)) ? -EFAULT : 0;
393 SYSCALL_DEFINE4(32_sendfile, long, out_fd, long, in_fd,
394 compat_off_t __user *, offset, s32, count)
396 mm_segment_t old_fs = get_fs();
400 if (offset && get_user(of, offset))
404 ret = sys_sendfile(out_fd, in_fd, offset ? (off_t __user *)&of : NULL, count);
407 if (offset && put_user(of, offset))
413 asmlinkage ssize_t sys32_readahead(int fd, u32 pad0, u64 a2, u64 a3,
416 return sys_readahead(fd, merge_64(a2, a3), count);
419 asmlinkage long sys32_sync_file_range(int fd, int __pad,
420 unsigned long a2, unsigned long a3,
421 unsigned long a4, unsigned long a5,
424 return sys_sync_file_range(fd,
425 merge_64(a2, a3), merge_64(a4, a5),
429 asmlinkage long sys32_fadvise64_64(int fd, int __pad,
430 unsigned long a2, unsigned long a3,
431 unsigned long a4, unsigned long a5,
434 return sys_fadvise64_64(fd,
435 merge_64(a2, a3), merge_64(a4, a5),
439 asmlinkage long sys32_fallocate(int fd, int mode, unsigned offset_a2,
440 unsigned offset_a3, unsigned len_a4, unsigned len_a5)
442 return sys_fallocate(fd, mode, merge_64(offset_a2, offset_a3),
443 merge_64(len_a4, len_a5));
446 save_static_function(sys32_clone);
447 static int noinline __used
448 _sys32_clone(nabi_no_regargs struct pt_regs regs)
450 unsigned long clone_flags;
452 int __user *parent_tidptr, *child_tidptr;
454 clone_flags = regs.regs[4];
455 newsp = regs.regs[5];
457 newsp = regs.regs[29];
458 parent_tidptr = (int __user *) regs.regs[6];
460 /* Use __dummy4 instead of getting it off the stack, so that
462 child_tidptr = (int __user *) __dummy4;
463 return do_fork(clone_flags, newsp, ®s, 0,
464 parent_tidptr, child_tidptr);