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)
7 #include <linux/compiler.h>
9 #include <linux/errno.h>
10 #include <linux/file.h>
11 #include <linux/highuid.h>
12 #include <linux/resource.h>
13 #include <linux/highmem.h>
14 #include <linux/time.h>
15 #include <linux/times.h>
16 #include <linux/poll.h>
17 #include <linux/skbuff.h>
18 #include <linux/filter.h>
19 #include <linux/shm.h>
20 #include <linux/sem.h>
21 #include <linux/msg.h>
22 #include <linux/icmpv6.h>
23 #include <linux/syscalls.h>
24 #include <linux/sysctl.h>
25 #include <linux/utime.h>
26 #include <linux/utsname.h>
27 #include <linux/personality.h>
28 #include <linux/dnotify.h>
29 #include <linux/module.h>
30 #include <linux/binfmts.h>
31 #include <linux/security.h>
32 #include <linux/compat.h>
33 #include <linux/vfs.h>
34 #include <linux/ipc.h>
35 #include <linux/slab.h>
40 #include <asm/compat-signal.h>
42 #include <asm/uaccess.h>
43 #include <asm/mmu_context.h>
46 /* Use this to get at 32-bit user passed pointers. */
47 /* A() macro should be used for places where you e.g.
48 have some internal variable u32 and just want to get
49 rid of a compiler warning. AA() has to be used in
50 places where you want to convert a function argument
51 to 32bit pointer or when you e.g. access pt_regs
52 structure and want to consider 32bit registers only.
54 #define A(__x) ((unsigned long)(__x))
55 #define AA(__x) ((unsigned long)((int)__x))
58 #define merge_64(r1, r2) ((((r1) & 0xffffffffUL) << 32) + ((r2) & 0xffffffffUL))
61 #define merge_64(r1, r2) ((((r2) & 0xffffffffUL) << 32) + ((r1) & 0xffffffffUL))
64 SYSCALL_DEFINE6(32_mmap2, unsigned long, addr, unsigned long, len,
65 unsigned long, prot, unsigned long, flags, unsigned long, fd,
71 if (pgoff & (~PAGE_MASK >> 12))
73 error = sys_mmap_pgoff(addr, len, prot, flags, fd,
74 pgoff >> (PAGE_SHIFT-12));
79 #define RLIM_INFINITY32 0x7fffffff
80 #define RESOURCE32(x) ((x > RLIM_INFINITY32) ? RLIM_INFINITY32 : x)
87 SYSCALL_DEFINE4(32_truncate64, const char __user *, path,
88 unsigned long, __dummy, unsigned long, a2, unsigned long, a3)
90 return sys_truncate(path, merge_64(a2, a3));
93 SYSCALL_DEFINE4(32_ftruncate64, unsigned long, fd, unsigned long, __dummy,
94 unsigned long, a2, unsigned long, a3)
96 return sys_ftruncate(fd, merge_64(a2, a3));
99 SYSCALL_DEFINE5(32_llseek, unsigned int, fd, unsigned int, offset_high,
100 unsigned int, offset_low, loff_t __user *, result,
101 unsigned int, origin)
103 return sys_llseek(fd, offset_high, offset_low, result, origin);
106 /* From the Single Unix Spec: pread & pwrite act like lseek to pos + op +
107 lseek back to original location. They fail just like lseek does on
108 non-seekable files. */
110 SYSCALL_DEFINE6(32_pread, unsigned long, fd, char __user *, buf, size_t, count,
111 unsigned long, unused, unsigned long, a4, unsigned long, a5)
113 return sys_pread64(fd, buf, count, merge_64(a4, a5));
116 SYSCALL_DEFINE6(32_pwrite, unsigned int, fd, const char __user *, buf,
117 size_t, count, u32, unused, u64, a4, u64, a5)
119 return sys_pwrite64(fd, buf, count, merge_64(a4, a5));
122 #ifdef CONFIG_SYSVIPC
124 SYSCALL_DEFINE6(32_ipc, u32, call, long, first, long, second, long, third,
125 unsigned long, ptr, unsigned long, fifth)
129 version = call >> 16; /* hack for backward compatibility */
134 /* struct sembuf is the same on 32 and 64bit :)) */
135 err = sys_semtimedop(first, compat_ptr(ptr), second, NULL);
138 err = compat_sys_semtimedop(first, compat_ptr(ptr), second,
142 err = sys_semget(first, second, third);
145 err = compat_sys_semctl(first, second, third, compat_ptr(ptr));
148 err = compat_sys_msgsnd(first, second, third, compat_ptr(ptr));
151 err = compat_sys_msgrcv(first, second, fifth, third,
152 version, compat_ptr(ptr));
155 err = sys_msgget((key_t) first, second);
158 err = compat_sys_msgctl(first, second, compat_ptr(ptr));
161 err = compat_sys_shmat(first, second, third, version,
165 err = sys_shmdt(compat_ptr(ptr));
168 err = sys_shmget(first, (unsigned)second, third);
171 err = compat_sys_shmctl(first, second, compat_ptr(ptr));
183 SYSCALL_DEFINE6(32_ipc, u32, call, int, first, int, second, int, third,
184 u32, ptr, u32, fifth)
189 #endif /* CONFIG_SYSVIPC */
191 #ifdef CONFIG_MIPS32_N32
192 SYSCALL_DEFINE4(n32_semctl, int, semid, int, semnum, int, cmd, u32, arg)
194 /* compat_sys_semctl expects a pointer to union semun */
195 u32 __user *uptr = compat_alloc_user_space(sizeof(u32));
196 if (put_user(arg, uptr))
198 return compat_sys_semctl(semid, semnum, cmd, uptr);
201 SYSCALL_DEFINE4(n32_msgsnd, int, msqid, u32, msgp, unsigned int, msgsz,
204 return compat_sys_msgsnd(msqid, msgsz, msgflg, compat_ptr(msgp));
207 SYSCALL_DEFINE5(n32_msgrcv, int, msqid, u32, msgp, size_t, msgsz,
208 int, msgtyp, int, msgflg)
210 return compat_sys_msgrcv(msqid, msgsz, msgtyp, msgflg, IPC_64,
215 SYSCALL_DEFINE1(32_personality, unsigned long, personality)
217 unsigned int p = personality & 0xffffffff;
220 if (personality(current->personality) == PER_LINUX32 &&
221 personality(p) == PER_LINUX)
222 p = (p & ~PER_MASK) | PER_LINUX32;
223 ret = sys_personality(p);
224 if (ret != -1 && personality(ret) == PER_LINUX32)
225 ret = (ret & ~PER_MASK) | PER_LINUX;
229 SYSCALL_DEFINE4(32_sendfile, long, out_fd, long, in_fd,
230 compat_off_t __user *, offset, s32, count)
232 mm_segment_t old_fs = get_fs();
236 if (offset && get_user(of, offset))
240 ret = sys_sendfile(out_fd, in_fd, offset ? (off_t __user *)&of : NULL, count);
243 if (offset && put_user(of, offset))
249 asmlinkage ssize_t sys32_readahead(int fd, u32 pad0, u64 a2, u64 a3,
252 return sys_readahead(fd, merge_64(a2, a3), count);
255 asmlinkage long sys32_sync_file_range(int fd, int __pad,
256 unsigned long a2, unsigned long a3,
257 unsigned long a4, unsigned long a5,
260 return sys_sync_file_range(fd,
261 merge_64(a2, a3), merge_64(a4, a5),
265 asmlinkage long sys32_fadvise64_64(int fd, int __pad,
266 unsigned long a2, unsigned long a3,
267 unsigned long a4, unsigned long a5,
270 return sys_fadvise64_64(fd,
271 merge_64(a2, a3), merge_64(a4, a5),
275 asmlinkage long sys32_fallocate(int fd, int mode, unsigned offset_a2,
276 unsigned offset_a3, unsigned len_a4, unsigned len_a5)
278 return sys_fallocate(fd, mode, merge_64(offset_a2, offset_a3),
279 merge_64(len_a4, len_a5));
282 asmlinkage long sys32_lookup_dcookie(u32 a0, u32 a1, char __user *buf,
285 return sys_lookup_dcookie(merge_64(a0, a1), buf, len);
288 SYSCALL_DEFINE6(32_fanotify_mark, int, fanotify_fd, unsigned int, flags,
289 u64, a3, u64, a4, int, dfd, const char __user *, pathname)
291 return sys_fanotify_mark(fanotify_fd, flags, merge_64(a3, a4),