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867e359b CM |
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> | |
867e359b CM |
19 | #include <linux/syscalls.h> |
20 | #include <linux/kdev_t.h> | |
21 | #include <linux/fs.h> | |
22 | #include <linux/fcntl.h> | |
867e359b CM |
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 | ||
35 | long 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 | ||
40 | long 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 | ||
45 | long 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 | ||
51 | long 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 | ||
57 | long 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 | ||
62 | long 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 | ||
71 | long 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 | ||
81 | long 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); | |
0707ad30 CM |
89 | ret = sys_sched_rr_get_interval(pid, |
90 | (struct timespec __force __user *)&t); | |
867e359b CM |
91 | set_fs(old_fs); |
92 | if (put_compat_timespec(&t, interval)) | |
93 | return -EFAULT; | |
94 | return ret; | |
95 | } | |
96 | ||
867e359b CM |
97 | /* Provide the compat syscall number to call mapping. */ |
98 | #undef __SYSCALL | |
be84cb43 | 99 | #define __SYSCALL(nr, call) [nr] = (call), |
867e359b | 100 | |
867e359b | 101 | /* See comments in sys.c */ |
867e359b CM |
102 | #define compat_sys_fadvise64_64 sys32_fadvise64_64 |
103 | #define compat_sys_readahead sys32_readahead | |
867e359b | 104 | |
d929b6ae CM |
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 | ||
0707ad30 CM |
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 | */ | |
867e359b CM |
115 | void *compat_sys_call_table[__NR_syscalls] = { |
116 | [0 ... __NR_syscalls-1] = sys_ni_syscall, | |
117 | #include <asm/unistd.h> | |
118 | }; |