Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * sys_ia32.c: Conversion between 32bit and 64bit native syscalls. Based on | |
c202f298 | 3 | * sys_sparc32 |
1da177e4 LT |
4 | * |
5 | * Copyright (C) 2000 VA Linux Co | |
6 | * Copyright (C) 2000 Don Dugger <n0ano@valinux.com> | |
c202f298 TG |
7 | * Copyright (C) 1999 Arun Sharma <arun.sharma@intel.com> |
8 | * Copyright (C) 1997,1998 Jakub Jelinek (jj@sunsite.mff.cuni.cz) | |
9 | * Copyright (C) 1997 David S. Miller (davem@caip.rutgers.edu) | |
1da177e4 LT |
10 | * Copyright (C) 2000 Hewlett-Packard Co. |
11 | * Copyright (C) 2000 David Mosberger-Tang <davidm@hpl.hp.com> | |
c202f298 | 12 | * Copyright (C) 2000,2001,2002 Andi Kleen, SuSE Labs (x86-64 port) |
1da177e4 LT |
13 | * |
14 | * These routines maintain argument size conversion between 32bit and 64bit | |
c202f298 | 15 | * environment. In 2.5 most of this should be moved to a generic directory. |
1da177e4 LT |
16 | * |
17 | * This file assumes that there is a hole at the end of user address space. | |
c202f298 TG |
18 | * |
19 | * Some of the functions are LE specific currently. These are | |
20 | * hopefully all marked. This should be fixed. | |
1da177e4 LT |
21 | */ |
22 | ||
1da177e4 LT |
23 | #include <linux/kernel.h> |
24 | #include <linux/sched.h> | |
c202f298 TG |
25 | #include <linux/fs.h> |
26 | #include <linux/file.h> | |
1da177e4 LT |
27 | #include <linux/signal.h> |
28 | #include <linux/syscalls.h> | |
1da177e4 LT |
29 | #include <linux/times.h> |
30 | #include <linux/utsname.h> | |
1da177e4 | 31 | #include <linux/mm.h> |
1da177e4 | 32 | #include <linux/uio.h> |
1da177e4 LT |
33 | #include <linux/poll.h> |
34 | #include <linux/personality.h> | |
35 | #include <linux/stat.h> | |
1da177e4 | 36 | #include <linux/rwsem.h> |
1da177e4 LT |
37 | #include <linux/compat.h> |
38 | #include <linux/vfs.h> | |
39 | #include <linux/ptrace.h> | |
40 | #include <linux/highuid.h> | |
ddb15ec1 | 41 | #include <linux/sysctl.h> |
5a0e3ad6 | 42 | #include <linux/slab.h> |
1da177e4 LT |
43 | #include <asm/mman.h> |
44 | #include <asm/types.h> | |
45 | #include <asm/uaccess.h> | |
60063497 | 46 | #include <linux/atomic.h> |
28d23128 | 47 | #include <asm/vgtod.h> |
2f06de06 | 48 | #include <asm/sys_ia32.h> |
1da177e4 LT |
49 | |
50 | #define AA(__x) ((unsigned long)(__x)) | |
51 | ||
1da177e4 | 52 | |
c7887325 | 53 | asmlinkage long sys32_truncate64(const char __user *filename, |
c202f298 TG |
54 | unsigned long offset_low, |
55 | unsigned long offset_high) | |
1da177e4 LT |
56 | { |
57 | return sys_truncate(filename, ((loff_t) offset_high << 32) | offset_low); | |
58 | } | |
59 | ||
c202f298 TG |
60 | asmlinkage long sys32_ftruncate64(unsigned int fd, unsigned long offset_low, |
61 | unsigned long offset_high) | |
1da177e4 LT |
62 | { |
63 | return sys_ftruncate(fd, ((loff_t) offset_high << 32) | offset_low); | |
64 | } | |
65 | ||
c202f298 TG |
66 | /* |
67 | * Another set for IA32/LFS -- x86_64 struct stat is different due to | |
68 | * support for 64bit inode numbers. | |
69 | */ | |
70 | static int cp_stat64(struct stat64 __user *ubuf, struct kstat *stat) | |
1da177e4 LT |
71 | { |
72 | typeof(ubuf->st_uid) uid = 0; | |
73 | typeof(ubuf->st_gid) gid = 0; | |
a7c1938e EB |
74 | SET_UID(uid, from_kuid_munged(current_user_ns(), stat->uid)); |
75 | SET_GID(gid, from_kgid_munged(current_user_ns(), stat->gid)); | |
1da177e4 LT |
76 | if (!access_ok(VERIFY_WRITE, ubuf, sizeof(struct stat64)) || |
77 | __put_user(huge_encode_dev(stat->dev), &ubuf->st_dev) || | |
c202f298 TG |
78 | __put_user(stat->ino, &ubuf->__st_ino) || |
79 | __put_user(stat->ino, &ubuf->st_ino) || | |
80 | __put_user(stat->mode, &ubuf->st_mode) || | |
81 | __put_user(stat->nlink, &ubuf->st_nlink) || | |
82 | __put_user(uid, &ubuf->st_uid) || | |
83 | __put_user(gid, &ubuf->st_gid) || | |
84 | __put_user(huge_encode_dev(stat->rdev), &ubuf->st_rdev) || | |
85 | __put_user(stat->size, &ubuf->st_size) || | |
86 | __put_user(stat->atime.tv_sec, &ubuf->st_atime) || | |
87 | __put_user(stat->atime.tv_nsec, &ubuf->st_atime_nsec) || | |
88 | __put_user(stat->mtime.tv_sec, &ubuf->st_mtime) || | |
89 | __put_user(stat->mtime.tv_nsec, &ubuf->st_mtime_nsec) || | |
90 | __put_user(stat->ctime.tv_sec, &ubuf->st_ctime) || | |
91 | __put_user(stat->ctime.tv_nsec, &ubuf->st_ctime_nsec) || | |
92 | __put_user(stat->blksize, &ubuf->st_blksize) || | |
93 | __put_user(stat->blocks, &ubuf->st_blocks)) | |
1da177e4 LT |
94 | return -EFAULT; |
95 | return 0; | |
96 | } | |
97 | ||
c7887325 | 98 | asmlinkage long sys32_stat64(const char __user *filename, |
c202f298 | 99 | struct stat64 __user *statbuf) |
1da177e4 LT |
100 | { |
101 | struct kstat stat; | |
102 | int ret = vfs_stat(filename, &stat); | |
c202f298 | 103 | |
1da177e4 LT |
104 | if (!ret) |
105 | ret = cp_stat64(statbuf, &stat); | |
106 | return ret; | |
107 | } | |
108 | ||
c7887325 | 109 | asmlinkage long sys32_lstat64(const char __user *filename, |
c202f298 | 110 | struct stat64 __user *statbuf) |
1da177e4 LT |
111 | { |
112 | struct kstat stat; | |
113 | int ret = vfs_lstat(filename, &stat); | |
114 | if (!ret) | |
115 | ret = cp_stat64(statbuf, &stat); | |
116 | return ret; | |
117 | } | |
118 | ||
c202f298 | 119 | asmlinkage long sys32_fstat64(unsigned int fd, struct stat64 __user *statbuf) |
1da177e4 LT |
120 | { |
121 | struct kstat stat; | |
122 | int ret = vfs_fstat(fd, &stat); | |
123 | if (!ret) | |
124 | ret = cp_stat64(statbuf, &stat); | |
125 | return ret; | |
126 | } | |
127 | ||
c7887325 | 128 | asmlinkage long sys32_fstatat(unsigned int dfd, const char __user *filename, |
c202f298 | 129 | struct stat64 __user *statbuf, int flag) |
cff2b760 UD |
130 | { |
131 | struct kstat stat; | |
0112fc22 | 132 | int error; |
cff2b760 | 133 | |
0112fc22 OD |
134 | error = vfs_fstatat(dfd, filename, &stat, flag); |
135 | if (error) | |
136 | return error; | |
137 | return cp_stat64(statbuf, &stat); | |
cff2b760 UD |
138 | } |
139 | ||
1da177e4 LT |
140 | /* |
141 | * Linux/i386 didn't use to be able to handle more than | |
142 | * 4 system call parameters, so these system calls used a memory | |
143 | * block for parameter passing.. | |
144 | */ | |
145 | ||
a4679373 | 146 | struct mmap_arg_struct32 { |
1da177e4 LT |
147 | unsigned int addr; |
148 | unsigned int len; | |
149 | unsigned int prot; | |
150 | unsigned int flags; | |
151 | unsigned int fd; | |
152 | unsigned int offset; | |
153 | }; | |
154 | ||
a4679373 | 155 | asmlinkage long sys32_mmap(struct mmap_arg_struct32 __user *arg) |
1da177e4 | 156 | { |
a4679373 | 157 | struct mmap_arg_struct32 a; |
1da177e4 LT |
158 | |
159 | if (copy_from_user(&a, arg, sizeof(a))) | |
160 | return -EFAULT; | |
161 | ||
162 | if (a.offset & ~PAGE_MASK) | |
c202f298 | 163 | return -EINVAL; |
1da177e4 | 164 | |
f8b72560 | 165 | return sys_mmap_pgoff(a.addr, a.len, a.prot, a.flags, a.fd, |
c202f298 | 166 | a.offset>>PAGE_SHIFT); |
1da177e4 LT |
167 | } |
168 | ||
f0002627 | 169 | asmlinkage long sys32_waitpid(compat_pid_t pid, unsigned int __user *stat_addr, |
c202f298 | 170 | int options) |
1da177e4 LT |
171 | { |
172 | return compat_sys_wait4(pid, stat_addr, options, NULL); | |
173 | } | |
174 | ||
c202f298 TG |
175 | /* warning: next two assume little endian */ |
176 | asmlinkage long sys32_pread(unsigned int fd, char __user *ubuf, u32 count, | |
177 | u32 poslo, u32 poshi) | |
1da177e4 LT |
178 | { |
179 | return sys_pread64(fd, ubuf, count, | |
180 | ((loff_t)AA(poshi) << 32) | AA(poslo)); | |
181 | } | |
182 | ||
c7887325 DH |
183 | asmlinkage long sys32_pwrite(unsigned int fd, const char __user *ubuf, |
184 | u32 count, u32 poslo, u32 poshi) | |
1da177e4 LT |
185 | { |
186 | return sys_pwrite64(fd, ubuf, count, | |
187 | ((loff_t)AA(poshi) << 32) | AA(poslo)); | |
188 | } | |
189 | ||
190 | ||
1da177e4 | 191 | /* |
c202f298 TG |
192 | * Some system calls that need sign extended arguments. This could be |
193 | * done by a generic wrapper. | |
194 | */ | |
c202f298 | 195 | long sys32_fadvise64_64(int fd, __u32 offset_low, __u32 offset_high, |
1da177e4 | 196 | __u32 len_low, __u32 len_high, int advice) |
c202f298 | 197 | { |
1da177e4 LT |
198 | return sys_fadvise64_64(fd, |
199 | (((u64)offset_high)<<32) | offset_low, | |
200 | (((u64)len_high)<<32) | len_low, | |
c202f298 TG |
201 | advice); |
202 | } | |
1da177e4 LT |
203 | |
204 | long sys32_vm86_warning(void) | |
c202f298 | 205 | { |
1da177e4 LT |
206 | struct task_struct *me = current; |
207 | static char lastcomm[sizeof(me->comm)]; | |
c202f298 | 208 | |
1da177e4 | 209 | if (strncmp(lastcomm, me->comm, sizeof(lastcomm))) { |
c202f298 TG |
210 | compat_printk(KERN_INFO |
211 | "%s: vm86 mode not supported on 64 bit kernel\n", | |
212 | me->comm); | |
1da177e4 | 213 | strncpy(lastcomm, me->comm, sizeof(lastcomm)); |
c202f298 | 214 | } |
1da177e4 | 215 | return -ENOSYS; |
c202f298 | 216 | } |
1da177e4 | 217 | |
c202f298 TG |
218 | asmlinkage ssize_t sys32_readahead(int fd, unsigned off_lo, unsigned off_hi, |
219 | size_t count) | |
e412ac49 AK |
220 | { |
221 | return sys_readahead(fd, ((u64)off_hi << 32) | off_lo, count); | |
222 | } | |
223 | ||
224 | asmlinkage long sys32_sync_file_range(int fd, unsigned off_low, unsigned off_hi, | |
c202f298 | 225 | unsigned n_low, unsigned n_hi, int flags) |
e412ac49 AK |
226 | { |
227 | return sys_sync_file_range(fd, | |
228 | ((u64)off_hi << 32) | off_low, | |
229 | ((u64)n_hi << 32) | n_low, flags); | |
230 | } | |
231 | ||
c202f298 TG |
232 | asmlinkage long sys32_fadvise64(int fd, unsigned offset_lo, unsigned offset_hi, |
233 | size_t len, int advice) | |
e412ac49 AK |
234 | { |
235 | return sys_fadvise64_64(fd, ((u64)offset_hi << 32) | offset_lo, | |
236 | len, advice); | |
237 | } | |
97ac7350 AA |
238 | |
239 | asmlinkage long sys32_fallocate(int fd, int mode, unsigned offset_lo, | |
240 | unsigned offset_hi, unsigned len_lo, | |
241 | unsigned len_hi) | |
242 | { | |
243 | return sys_fallocate(fd, mode, ((u64)offset_hi << 32) | offset_lo, | |
244 | ((u64)len_hi << 32) | len_lo); | |
245 | } |