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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 | ||
87c319a2 CM |
35 | COMPAT_SYSCALL_DEFINE4(truncate64, char __user *, filename, u32, dummy, |
36 | u32, low, u32, high) | |
867e359b CM |
37 | { |
38 | return sys_truncate(filename, ((loff_t)high << 32) | low); | |
39 | } | |
40 | ||
87c319a2 CM |
41 | COMPAT_SYSCALL_DEFINE4(ftruncate64, unsigned int, fd, u32, dummy, |
42 | u32, low, u32, high) | |
867e359b CM |
43 | { |
44 | return sys_ftruncate(fd, ((loff_t)high << 32) | low); | |
45 | } | |
46 | ||
87c319a2 CM |
47 | COMPAT_SYSCALL_DEFINE6(pread64, unsigned int, fd, char __user *, ubuf, |
48 | size_t, count, u32, dummy, u32, low, u32, high) | |
867e359b CM |
49 | { |
50 | return sys_pread64(fd, ubuf, count, ((loff_t)high << 32) | low); | |
51 | } | |
52 | ||
87c319a2 CM |
53 | COMPAT_SYSCALL_DEFINE6(pwrite64, unsigned int, fd, char __user *, ubuf, |
54 | size_t, count, u32, dummy, u32, low, u32, high) | |
867e359b CM |
55 | { |
56 | return sys_pwrite64(fd, ubuf, count, ((loff_t)high << 32) | low); | |
57 | } | |
58 | ||
87c319a2 CM |
59 | COMPAT_SYSCALL_DEFINE6(sync_file_range2, int, fd, unsigned int, flags, |
60 | u32, offset_lo, u32, offset_hi, | |
61 | u32, nbytes_lo, u32, nbytes_hi) | |
867e359b CM |
62 | { |
63 | return sys_sync_file_range(fd, ((loff_t)offset_hi << 32) | offset_lo, | |
64 | ((loff_t)nbytes_hi << 32) | nbytes_lo, | |
65 | flags); | |
66 | } | |
67 | ||
87c319a2 CM |
68 | COMPAT_SYSCALL_DEFINE6(fallocate, int, fd, int, mode, |
69 | u32, offset_lo, u32, offset_hi, | |
70 | u32, len_lo, u32, len_hi) | |
867e359b CM |
71 | { |
72 | return sys_fallocate(fd, mode, ((loff_t)offset_hi << 32) | offset_lo, | |
73 | ((loff_t)len_hi << 32) | len_lo); | |
74 | } | |
75 | ||
5a114b98 CM |
76 | /* |
77 | * Avoid bug in generic sys_llseek() that specifies offset_high and | |
78 | * offset_low as "unsigned long", thus making it possible to pass | |
79 | * a sign-extended high 32 bits in offset_low. | |
80 | */ | |
87c319a2 CM |
81 | COMPAT_SYSCALL_DEFINE5(llseek, unsigned int, fd, unsigned int, offset_high, |
82 | unsigned int, offset_low, loff_t __user *, result, | |
83 | unsigned int, origin) | |
5a114b98 CM |
84 | { |
85 | return sys_llseek(fd, offset_high, offset_low, result, origin); | |
86 | } | |
e823acc0 | 87 | |
867e359b CM |
88 | /* Provide the compat syscall number to call mapping. */ |
89 | #undef __SYSCALL | |
be84cb43 | 90 | #define __SYSCALL(nr, call) [nr] = (call), |
867e359b | 91 | |
867e359b | 92 | /* See comments in sys.c */ |
867e359b CM |
93 | #define compat_sys_fadvise64_64 sys32_fadvise64_64 |
94 | #define compat_sys_readahead sys32_readahead | |
5a114b98 | 95 | #define sys_llseek compat_sys_llseek |
867e359b | 96 | |
6b14e419 | 97 | /* Call the assembly trampolines where necessary. */ |
d929b6ae CM |
98 | #define compat_sys_rt_sigreturn _compat_sys_rt_sigreturn |
99 | #define sys_clone _sys_clone | |
100 | ||
0707ad30 CM |
101 | /* |
102 | * Note that we can't include <linux/unistd.h> here since the header | |
103 | * guard will defeat us; <asm/unistd.h> checks for __SYSCALL as well. | |
104 | */ | |
867e359b CM |
105 | void *compat_sys_call_table[__NR_syscalls] = { |
106 | [0 ... __NR_syscalls-1] = sys_ni_syscall, | |
107 | #include <asm/unistd.h> | |
108 | }; |