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,
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 SYSCALL_DEFINE4(32_truncate64, const char __user *, path,
125 unsigned long, __dummy, unsigned long, a2, unsigned long, a3)
127 return sys_truncate(path, merge_64(a2, a3));
130 SYSCALL_DEFINE4(32_ftruncate64, unsigned long, fd, unsigned long, __dummy,
131 unsigned long, a2, unsigned long, a3)
133 return sys_ftruncate(fd, merge_64(a2, a3));
136 SYSCALL_DEFINE5(32_llseek, unsigned int, fd, unsigned int, offset_high,
137 unsigned int, offset_low, loff_t __user *, result,
138 unsigned int, origin)
140 return sys_llseek(fd, offset_high, offset_low, result, origin);
143 /* From the Single Unix Spec: pread & pwrite act like lseek to pos + op +
144 lseek back to original location. They fail just like lseek does on
145 non-seekable files. */
147 SYSCALL_DEFINE6(32_pread, unsigned long, fd, char __user *, buf, size_t, count,
148 unsigned long, unused, unsigned long, a4, unsigned long, a5)
150 return sys_pread64(fd, buf, count, merge_64(a4, a5));
153 SYSCALL_DEFINE6(32_pwrite, unsigned int, fd, const char __user *, buf,
154 size_t, count, u32, unused, u64, a4, u64, a5)
156 return sys_pwrite64(fd, buf, count, merge_64(a4, a5));
159 SYSCALL_DEFINE2(32_sched_rr_get_interval, compat_pid_t, pid,
160 struct compat_timespec __user *, interval)
164 mm_segment_t old_fs = get_fs();
167 ret = sys_sched_rr_get_interval(pid, (struct timespec __user *)&t);
169 if (put_user (t.tv_sec, &interval->tv_sec) ||
170 __put_user(t.tv_nsec, &interval->tv_nsec))
175 #ifdef CONFIG_SYSVIPC
177 SYSCALL_DEFINE6(32_ipc, u32, call, long, first, long, second, long, third,
178 unsigned long, ptr, unsigned long, fifth)
182 version = call >> 16; /* hack for backward compatibility */
187 /* struct sembuf is the same on 32 and 64bit :)) */
188 err = sys_semtimedop(first, compat_ptr(ptr), second, NULL);
191 err = compat_sys_semtimedop(first, compat_ptr(ptr), second,
195 err = sys_semget(first, second, third);
198 err = compat_sys_semctl(first, second, third, compat_ptr(ptr));
201 err = compat_sys_msgsnd(first, second, third, compat_ptr(ptr));
204 err = compat_sys_msgrcv(first, second, fifth, third,
205 version, compat_ptr(ptr));
208 err = sys_msgget((key_t) first, second);
211 err = compat_sys_msgctl(first, second, compat_ptr(ptr));
214 err = compat_sys_shmat(first, second, third, version,
218 err = sys_shmdt(compat_ptr(ptr));
221 err = sys_shmget(first, (unsigned)second, third);
224 err = compat_sys_shmctl(first, second, compat_ptr(ptr));
236 SYSCALL_DEFINE6(32_ipc, u32, call, int, first, int, second, int, third,
237 u32, ptr, u32, fifth)
242 #endif /* CONFIG_SYSVIPC */
244 #ifdef CONFIG_MIPS32_N32
245 SYSCALL_DEFINE4(n32_semctl, int, semid, int, semnum, int, cmd, u32, arg)
247 /* compat_sys_semctl expects a pointer to union semun */
248 u32 __user *uptr = compat_alloc_user_space(sizeof(u32));
249 if (put_user(arg, uptr))
251 return compat_sys_semctl(semid, semnum, cmd, uptr);
254 SYSCALL_DEFINE4(n32_msgsnd, int, msqid, u32, msgp, unsigned int, msgsz,
257 return compat_sys_msgsnd(msqid, msgsz, msgflg, compat_ptr(msgp));
260 SYSCALL_DEFINE5(n32_msgrcv, int, msqid, u32, msgp, size_t, msgsz,
261 int, msgtyp, int, msgflg)
263 return compat_sys_msgrcv(msqid, msgsz, msgtyp, msgflg, IPC_64,
272 compat_caddr_t oldval;
273 compat_caddr_t oldlenp;
274 compat_caddr_t newval;
275 compat_size_t newlen;
276 unsigned int __unused[4];
279 #ifdef CONFIG_SYSCTL_SYSCALL
281 SYSCALL_DEFINE1(32_sysctl, struct sysctl_args32 __user *, args)
283 struct sysctl_args32 tmp;
286 size_t __user *oldlenp = NULL;
287 unsigned long addr = (((unsigned long)&args->__unused[0]) + 7) & ~7;
289 if (copy_from_user(&tmp, args, sizeof(tmp)))
292 if (tmp.oldval && tmp.oldlenp) {
293 /* Duh, this is ugly and might not work if sysctl_args
294 is in read-only memory, but do_sysctl does indirectly
295 a lot of uaccess in both directions and we'd have to
296 basically copy the whole sysctl.c here, and
297 glibc's __sysctl uses rw memory for the structure
299 if (get_user(oldlen, (u32 __user *)A(tmp.oldlenp)) ||
300 put_user(oldlen, (size_t __user *)addr))
302 oldlenp = (size_t __user *)addr;
306 error = do_sysctl((int __user *)A(tmp.name), tmp.nlen, (void __user *)A(tmp.oldval),
307 oldlenp, (void __user *)A(tmp.newval), tmp.newlen);
311 if (get_user(oldlen, (size_t __user *)addr) ||
312 put_user(oldlen, (u32 __user *)A(tmp.oldlenp)))
315 copy_to_user(args->__unused, tmp.__unused, sizeof(tmp.__unused));
322 SYSCALL_DEFINE1(32_sysctl, struct sysctl_args32 __user *, args)
327 #endif /* CONFIG_SYSCTL_SYSCALL */
329 SYSCALL_DEFINE1(32_newuname, struct new_utsname __user *, name)
334 if (copy_to_user(name, utsname(), sizeof *name))
338 if (current->personality == PER_LINUX32 && !ret)
339 if (copy_to_user(name->machine, "mips\0\0\0", 8))
345 SYSCALL_DEFINE1(32_personality, unsigned long, personality)
348 personality &= 0xffffffff;
349 if (personality(current->personality) == PER_LINUX32 &&
350 personality == PER_LINUX)
351 personality = PER_LINUX32;
352 ret = sys_personality(personality);
353 if (ret == PER_LINUX32)
358 SYSCALL_DEFINE4(32_sendfile, long, out_fd, long, in_fd,
359 compat_off_t __user *, offset, s32, count)
361 mm_segment_t old_fs = get_fs();
365 if (offset && get_user(of, offset))
369 ret = sys_sendfile(out_fd, in_fd, offset ? (off_t __user *)&of : NULL, count);
372 if (offset && put_user(of, offset))
378 asmlinkage ssize_t sys32_readahead(int fd, u32 pad0, u64 a2, u64 a3,
381 return sys_readahead(fd, merge_64(a2, a3), count);
384 asmlinkage long sys32_sync_file_range(int fd, int __pad,
385 unsigned long a2, unsigned long a3,
386 unsigned long a4, unsigned long a5,
389 return sys_sync_file_range(fd,
390 merge_64(a2, a3), merge_64(a4, a5),
394 asmlinkage long sys32_fadvise64_64(int fd, int __pad,
395 unsigned long a2, unsigned long a3,
396 unsigned long a4, unsigned long a5,
399 return sys_fadvise64_64(fd,
400 merge_64(a2, a3), merge_64(a4, a5),
404 asmlinkage long sys32_fallocate(int fd, int mode, unsigned offset_a2,
405 unsigned offset_a3, unsigned len_a4, unsigned len_a5)
407 return sys_fallocate(fd, mode, merge_64(offset_a2, offset_a3),
408 merge_64(len_a4, len_a5));
411 save_static_function(sys32_clone);
412 static int noinline __used
413 _sys32_clone(nabi_no_regargs struct pt_regs regs)
415 unsigned long clone_flags;
417 int __user *parent_tidptr, *child_tidptr;
419 clone_flags = regs.regs[4];
420 newsp = regs.regs[5];
422 newsp = regs.regs[29];
423 parent_tidptr = (int __user *) regs.regs[6];
425 /* Use __dummy4 instead of getting it off the stack, so that
427 child_tidptr = (int __user *) __dummy4;
428 return do_fork(clone_flags, newsp, ®s, 0,
429 parent_tidptr, child_tidptr);