Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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linux
1/*
2 * Copyright 2010 Tilera Corporation. All Rights Reserved.
3 *
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public License
6 * as published by the Free Software Foundation, version 2.
7 *
8 * This program is distributed in the hope that it will be useful, but
9 * WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
11 * NON INFRINGEMENT. See the GNU General Public License for
12 * more details.
13 */
14
15/* Adjust unistd.h to provide 32-bit numbers and functions. */
16#define __SYSCALL_COMPAT
17
18#include <linux/compat.h>
19#include <linux/syscalls.h>
20#include <linux/kdev_t.h>
21#include <linux/fs.h>
22#include <linux/fcntl.h>
23#include <linux/uaccess.h>
24#include <linux/signal.h>
25#include <asm/syscalls.h>
26
27/*
28 * Syscalls that take 64-bit numbers traditionally take them in 32-bit
29 * "high" and "low" value parts on 32-bit architectures.
30 * In principle, one could imagine passing some register arguments as
31 * fully 64-bit on TILE-Gx in 32-bit mode, but it seems easier to
32 * adapt the usual convention.
33 */
34
35long compat_sys_truncate64(char __user *filename, u32 dummy, u32 low, u32 high)
36{
37 return sys_truncate(filename, ((loff_t)high << 32) | low);
38}
39
40long compat_sys_ftruncate64(unsigned int fd, u32 dummy, u32 low, u32 high)
41{
42 return sys_ftruncate(fd, ((loff_t)high << 32) | low);
43}
44
45long compat_sys_pread64(unsigned int fd, char __user *ubuf, size_t count,
46 u32 dummy, u32 low, u32 high)
47{
48 return sys_pread64(fd, ubuf, count, ((loff_t)high << 32) | low);
49}
50
51long compat_sys_pwrite64(unsigned int fd, char __user *ubuf, size_t count,
52 u32 dummy, u32 low, u32 high)
53{
54 return sys_pwrite64(fd, ubuf, count, ((loff_t)high << 32) | low);
55}
56
57long compat_sys_lookup_dcookie(u32 low, u32 high, char __user *buf, size_t len)
58{
59 return sys_lookup_dcookie(((loff_t)high << 32) | low, buf, len);
60}
61
62long compat_sys_sync_file_range2(int fd, unsigned int flags,
63 u32 offset_lo, u32 offset_hi,
64 u32 nbytes_lo, u32 nbytes_hi)
65{
66 return sys_sync_file_range(fd, ((loff_t)offset_hi << 32) | offset_lo,
67 ((loff_t)nbytes_hi << 32) | nbytes_lo,
68 flags);
69}
70
71long compat_sys_fallocate(int fd, int mode,
72 u32 offset_lo, u32 offset_hi,
73 u32 len_lo, u32 len_hi)
74{
75 return sys_fallocate(fd, mode, ((loff_t)offset_hi << 32) | offset_lo,
76 ((loff_t)len_hi << 32) | len_lo);
77}
78
79
80
81long compat_sys_sched_rr_get_interval(compat_pid_t pid,
82 struct compat_timespec __user *interval)
83{
84 struct timespec t;
85 int ret;
86 mm_segment_t old_fs = get_fs();
87
88 set_fs(KERNEL_DS);
89 ret = sys_sched_rr_get_interval(pid,
90 (struct timespec __force __user *)&t);
91 set_fs(old_fs);
92 if (put_compat_timespec(&t, interval))
93 return -EFAULT;
94 return ret;
95}
96
97/* Provide the compat syscall number to call mapping. */
98#undef __SYSCALL
99#define __SYSCALL(nr, call) [nr] = (call),
100
101/* See comments in sys.c */
102#define compat_sys_fadvise64_64 sys32_fadvise64_64
103#define compat_sys_readahead sys32_readahead
104
105/* Call the trampolines to manage pt_regs where necessary. */
106#define compat_sys_execve _compat_sys_execve
107#define compat_sys_sigaltstack _compat_sys_sigaltstack
108#define compat_sys_rt_sigreturn _compat_sys_rt_sigreturn
109#define sys_clone _sys_clone
110
111/*
112 * Note that we can't include <linux/unistd.h> here since the header
113 * guard will defeat us; <asm/unistd.h> checks for __SYSCALL as well.
114 */
115void *compat_sys_call_table[__NR_syscalls] = {
116 [0 ... __NR_syscalls-1] = sys_ni_syscall,
117#include <asm/unistd.h>
118};