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1/*
2 * sys_ia32.c: Conversion between 32bit and 64bit native syscalls. Based on
3 * sys_sparc32
4 *
5 * Copyright (C) 2000 VA Linux Co
6 * Copyright (C) 2000 Don Dugger <n0ano@valinux.com>
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)
10 * Copyright (C) 2000 Hewlett-Packard Co.
11 * Copyright (C) 2000 David Mosberger-Tang <davidm@hpl.hp.com>
12 * Copyright (C) 2000,2001,2002 Andi Kleen, SuSE Labs (x86-64 port)
13 *
14 * These routines maintain argument size conversion between 32bit and 64bit
15 * environment. In 2.5 most of this should be moved to a generic directory.
16 *
17 * This file assumes that there is a hole at the end of user address space.
18 *
19 * Some of the functions are LE specific currently. These are
20 * hopefully all marked. This should be fixed.
21 */
22
23#include <linux/kernel.h>
24#include <linux/sched.h>
25#include <linux/fs.h>
26#include <linux/file.h>
27#include <linux/signal.h>
28#include <linux/syscalls.h>
29#include <linux/times.h>
30#include <linux/utsname.h>
31#include <linux/mm.h>
32#include <linux/uio.h>
33#include <linux/poll.h>
34#include <linux/personality.h>
35#include <linux/stat.h>
36#include <linux/rwsem.h>
37#include <linux/compat.h>
38#include <linux/vfs.h>
39#include <linux/ptrace.h>
40#include <linux/highuid.h>
41#include <linux/sysctl.h>
42#include <linux/slab.h>
43#include <asm/mman.h>
44#include <asm/types.h>
45#include <asm/uaccess.h>
46#include <linux/atomic.h>
47#include <asm/vgtod.h>
48#include <asm/sys_ia32.h>
49
50#define AA(__x) ((unsigned long)(__x))
51
52
53asmlinkage long sys32_truncate64(const char __user *filename,
54 unsigned long offset_low,
55 unsigned long offset_high)
56{
57 return sys_truncate(filename, ((loff_t) offset_high << 32) | offset_low);
58}
59
60asmlinkage long sys32_ftruncate64(unsigned int fd, unsigned long offset_low,
61 unsigned long offset_high)
62{
63 return sys_ftruncate(fd, ((loff_t) offset_high << 32) | offset_low);
64}
65
66/*
67 * Another set for IA32/LFS -- x86_64 struct stat is different due to
68 * support for 64bit inode numbers.
69 */
70static int cp_stat64(struct stat64 __user *ubuf, struct kstat *stat)
71{
72 typeof(ubuf->st_uid) uid = 0;
73 typeof(ubuf->st_gid) gid = 0;
74 SET_UID(uid, from_kuid_munged(current_user_ns(), stat->uid));
75 SET_GID(gid, from_kgid_munged(current_user_ns(), stat->gid));
76 if (!access_ok(VERIFY_WRITE, ubuf, sizeof(struct stat64)) ||
77 __put_user(huge_encode_dev(stat->dev), &ubuf->st_dev) ||
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))
94 return -EFAULT;
95 return 0;
96}
97
98asmlinkage long sys32_stat64(const char __user *filename,
99 struct stat64 __user *statbuf)
100{
101 struct kstat stat;
102 int ret = vfs_stat(filename, &stat);
103
104 if (!ret)
105 ret = cp_stat64(statbuf, &stat);
106 return ret;
107}
108
109asmlinkage long sys32_lstat64(const char __user *filename,
110 struct stat64 __user *statbuf)
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
119asmlinkage long sys32_fstat64(unsigned int fd, struct stat64 __user *statbuf)
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
128asmlinkage long sys32_fstatat(unsigned int dfd, const char __user *filename,
129 struct stat64 __user *statbuf, int flag)
130{
131 struct kstat stat;
132 int error;
133
134 error = vfs_fstatat(dfd, filename, &stat, flag);
135 if (error)
136 return error;
137 return cp_stat64(statbuf, &stat);
138}
139
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
146struct mmap_arg_struct32 {
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
155asmlinkage long sys32_mmap(struct mmap_arg_struct32 __user *arg)
156{
157 struct mmap_arg_struct32 a;
158
159 if (copy_from_user(&a, arg, sizeof(a)))
160 return -EFAULT;
161
162 if (a.offset & ~PAGE_MASK)
163 return -EINVAL;
164
165 return sys_mmap_pgoff(a.addr, a.len, a.prot, a.flags, a.fd,
166 a.offset>>PAGE_SHIFT);
167}
168
169asmlinkage long sys32_waitpid(compat_pid_t pid, unsigned int __user *stat_addr,
170 int options)
171{
172 return compat_sys_wait4(pid, stat_addr, options, NULL);
173}
174
175/* warning: next two assume little endian */
176asmlinkage long sys32_pread(unsigned int fd, char __user *ubuf, u32 count,
177 u32 poslo, u32 poshi)
178{
179 return sys_pread64(fd, ubuf, count,
180 ((loff_t)AA(poshi) << 32) | AA(poslo));
181}
182
183asmlinkage long sys32_pwrite(unsigned int fd, const char __user *ubuf,
184 u32 count, u32 poslo, u32 poshi)
185{
186 return sys_pwrite64(fd, ubuf, count,
187 ((loff_t)AA(poshi) << 32) | AA(poslo));
188}
189
190
191/*
192 * Some system calls that need sign extended arguments. This could be
193 * done by a generic wrapper.
194 */
195long sys32_fadvise64_64(int fd, __u32 offset_low, __u32 offset_high,
196 __u32 len_low, __u32 len_high, int advice)
197{
198 return sys_fadvise64_64(fd,
199 (((u64)offset_high)<<32) | offset_low,
200 (((u64)len_high)<<32) | len_low,
201 advice);
202}
203
204asmlinkage ssize_t sys32_readahead(int fd, unsigned off_lo, unsigned off_hi,
205 size_t count)
206{
207 return sys_readahead(fd, ((u64)off_hi << 32) | off_lo, count);
208}
209
210asmlinkage long sys32_sync_file_range(int fd, unsigned off_low, unsigned off_hi,
211 unsigned n_low, unsigned n_hi, int flags)
212{
213 return sys_sync_file_range(fd,
214 ((u64)off_hi << 32) | off_low,
215 ((u64)n_hi << 32) | n_low, flags);
216}
217
218asmlinkage long sys32_fadvise64(int fd, unsigned offset_lo, unsigned offset_hi,
219 size_t len, int advice)
220{
221 return sys_fadvise64_64(fd, ((u64)offset_hi << 32) | offset_lo,
222 len, advice);
223}
224
225asmlinkage long sys32_fallocate(int fd, int mode, unsigned offset_lo,
226 unsigned offset_hi, unsigned len_lo,
227 unsigned len_hi)
228{
229 return sys_fallocate(fd, mode, ((u64)offset_hi << 32) | offset_lo,
230 ((u64)len_hi << 32) | len_lo);
231}
1/*
2 * sys_ia32.c: Conversion between 32bit and 64bit native syscalls. Based on
3 * sys_sparc32
4 *
5 * Copyright (C) 2000 VA Linux Co
6 * Copyright (C) 2000 Don Dugger <n0ano@valinux.com>
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)
10 * Copyright (C) 2000 Hewlett-Packard Co.
11 * Copyright (C) 2000 David Mosberger-Tang <davidm@hpl.hp.com>
12 * Copyright (C) 2000,2001,2002 Andi Kleen, SuSE Labs (x86-64 port)
13 *
14 * These routines maintain argument size conversion between 32bit and 64bit
15 * environment. In 2.5 most of this should be moved to a generic directory.
16 *
17 * This file assumes that there is a hole at the end of user address space.
18 *
19 * Some of the functions are LE specific currently. These are
20 * hopefully all marked. This should be fixed.
21 */
22
23#include <linux/kernel.h>
24#include <linux/sched.h>
25#include <linux/fs.h>
26#include <linux/file.h>
27#include <linux/signal.h>
28#include <linux/syscalls.h>
29#include <linux/times.h>
30#include <linux/utsname.h>
31#include <linux/mm.h>
32#include <linux/uio.h>
33#include <linux/poll.h>
34#include <linux/personality.h>
35#include <linux/stat.h>
36#include <linux/rwsem.h>
37#include <linux/compat.h>
38#include <linux/vfs.h>
39#include <linux/ptrace.h>
40#include <linux/highuid.h>
41#include <linux/sysctl.h>
42#include <linux/slab.h>
43#include <asm/mman.h>
44#include <asm/types.h>
45#include <asm/uaccess.h>
46#include <linux/atomic.h>
47#include <asm/vgtod.h>
48#include <asm/sys_ia32.h>
49
50#define AA(__x) ((unsigned long)(__x))
51
52
53asmlinkage long sys32_truncate64(const char __user *filename,
54 unsigned long offset_low,
55 unsigned long offset_high)
56{
57 return sys_truncate(filename, ((loff_t) offset_high << 32) | offset_low);
58}
59
60asmlinkage long sys32_ftruncate64(unsigned int fd, unsigned long offset_low,
61 unsigned long offset_high)
62{
63 return sys_ftruncate(fd, ((loff_t) offset_high << 32) | offset_low);
64}
65
66/*
67 * Another set for IA32/LFS -- x86_64 struct stat is different due to
68 * support for 64bit inode numbers.
69 */
70static int cp_stat64(struct stat64 __user *ubuf, struct kstat *stat)
71{
72 typeof(ubuf->st_uid) uid = 0;
73 typeof(ubuf->st_gid) gid = 0;
74 SET_UID(uid, from_kuid_munged(current_user_ns(), stat->uid));
75 SET_GID(gid, from_kgid_munged(current_user_ns(), stat->gid));
76 if (!access_ok(VERIFY_WRITE, ubuf, sizeof(struct stat64)) ||
77 __put_user(huge_encode_dev(stat->dev), &ubuf->st_dev) ||
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))
94 return -EFAULT;
95 return 0;
96}
97
98asmlinkage long sys32_stat64(const char __user *filename,
99 struct stat64 __user *statbuf)
100{
101 struct kstat stat;
102 int ret = vfs_stat(filename, &stat);
103
104 if (!ret)
105 ret = cp_stat64(statbuf, &stat);
106 return ret;
107}
108
109asmlinkage long sys32_lstat64(const char __user *filename,
110 struct stat64 __user *statbuf)
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
119asmlinkage long sys32_fstat64(unsigned int fd, struct stat64 __user *statbuf)
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
128asmlinkage long sys32_fstatat(unsigned int dfd, const char __user *filename,
129 struct stat64 __user *statbuf, int flag)
130{
131 struct kstat stat;
132 int error;
133
134 error = vfs_fstatat(dfd, filename, &stat, flag);
135 if (error)
136 return error;
137 return cp_stat64(statbuf, &stat);
138}
139
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
146struct mmap_arg_struct32 {
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
155asmlinkage long sys32_mmap(struct mmap_arg_struct32 __user *arg)
156{
157 struct mmap_arg_struct32 a;
158
159 if (copy_from_user(&a, arg, sizeof(a)))
160 return -EFAULT;
161
162 if (a.offset & ~PAGE_MASK)
163 return -EINVAL;
164
165 return sys_mmap_pgoff(a.addr, a.len, a.prot, a.flags, a.fd,
166 a.offset>>PAGE_SHIFT);
167}
168
169asmlinkage long sys32_waitpid(compat_pid_t pid, unsigned int __user *stat_addr,
170 int options)
171{
172 return compat_sys_wait4(pid, stat_addr, options, NULL);
173}
174
175/* warning: next two assume little endian */
176asmlinkage long sys32_pread(unsigned int fd, char __user *ubuf, u32 count,
177 u32 poslo, u32 poshi)
178{
179 return sys_pread64(fd, ubuf, count,
180 ((loff_t)AA(poshi) << 32) | AA(poslo));
181}
182
183asmlinkage long sys32_pwrite(unsigned int fd, const char __user *ubuf,
184 u32 count, u32 poslo, u32 poshi)
185{
186 return sys_pwrite64(fd, ubuf, count,
187 ((loff_t)AA(poshi) << 32) | AA(poslo));
188}
189
190
191/*
192 * Some system calls that need sign extended arguments. This could be
193 * done by a generic wrapper.
194 */
195long sys32_fadvise64_64(int fd, __u32 offset_low, __u32 offset_high,
196 __u32 len_low, __u32 len_high, int advice)
197{
198 return sys_fadvise64_64(fd,
199 (((u64)offset_high)<<32) | offset_low,
200 (((u64)len_high)<<32) | len_low,
201 advice);
202}
203
204long sys32_vm86_warning(void)
205{
206 struct task_struct *me = current;
207 static char lastcomm[sizeof(me->comm)];
208
209 if (strncmp(lastcomm, me->comm, sizeof(lastcomm))) {
210 compat_printk(KERN_INFO
211 "%s: vm86 mode not supported on 64 bit kernel\n",
212 me->comm);
213 strncpy(lastcomm, me->comm, sizeof(lastcomm));
214 }
215 return -ENOSYS;
216}
217
218asmlinkage ssize_t sys32_readahead(int fd, unsigned off_lo, unsigned off_hi,
219 size_t count)
220{
221 return sys_readahead(fd, ((u64)off_hi << 32) | off_lo, count);
222}
223
224asmlinkage long sys32_sync_file_range(int fd, unsigned off_low, unsigned off_hi,
225 unsigned n_low, unsigned n_hi, int flags)
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
232asmlinkage long sys32_fadvise64(int fd, unsigned offset_lo, unsigned offset_hi,
233 size_t len, int advice)
234{
235 return sys_fadvise64_64(fd, ((u64)offset_hi << 32) | offset_lo,
236 len, advice);
237}
238
239asmlinkage 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}