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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 | ||
5a114b98 CM |
79 | /* |
80 | * Avoid bug in generic sys_llseek() that specifies offset_high and | |
81 | * offset_low as "unsigned long", thus making it possible to pass | |
82 | * a sign-extended high 32 bits in offset_low. | |
83 | */ | |
84 | long compat_sys_llseek(unsigned int fd, unsigned int offset_high, | |
85 | unsigned int offset_low, loff_t __user * result, | |
86 | unsigned int origin) | |
87 | { | |
88 | return sys_llseek(fd, offset_high, offset_low, result, origin); | |
89 | } | |
90 | ||
867e359b CM |
91 | /* Provide the compat syscall number to call mapping. */ |
92 | #undef __SYSCALL | |
be84cb43 | 93 | #define __SYSCALL(nr, call) [nr] = (call), |
867e359b | 94 | |
867e359b | 95 | /* See comments in sys.c */ |
867e359b CM |
96 | #define compat_sys_fadvise64_64 sys32_fadvise64_64 |
97 | #define compat_sys_readahead sys32_readahead | |
5a114b98 | 98 | #define sys_llseek compat_sys_llseek |
867e359b | 99 | |
6b14e419 | 100 | /* Call the assembly trampolines where necessary. */ |
d929b6ae CM |
101 | #define compat_sys_rt_sigreturn _compat_sys_rt_sigreturn |
102 | #define sys_clone _sys_clone | |
103 | ||
0707ad30 CM |
104 | /* |
105 | * Note that we can't include <linux/unistd.h> here since the header | |
106 | * guard will defeat us; <asm/unistd.h> checks for __SYSCALL as well. | |
107 | */ | |
867e359b CM |
108 | void *compat_sys_call_table[__NR_syscalls] = { |
109 | [0 ... __NR_syscalls-1] = sys_ni_syscall, | |
110 | #include <asm/unistd.h> | |
111 | }; |