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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> | |
ca768667 | 26 | #include <asm/byteorder.h> |
867e359b CM |
27 | |
28 | /* | |
29 | * Syscalls that take 64-bit numbers traditionally take them in 32-bit | |
30 | * "high" and "low" value parts on 32-bit architectures. | |
31 | * In principle, one could imagine passing some register arguments as | |
32 | * fully 64-bit on TILE-Gx in 32-bit mode, but it seems easier to | |
ca768667 | 33 | * adopt the usual convention. |
867e359b CM |
34 | */ |
35 | ||
ca768667 CM |
36 | #ifdef __BIG_ENDIAN |
37 | #define SYSCALL_PAIR(name) u32, name ## _hi, u32, name ## _lo | |
38 | #else | |
39 | #define SYSCALL_PAIR(name) u32, name ## _lo, u32, name ## _hi | |
40 | #endif | |
41 | ||
87c319a2 | 42 | COMPAT_SYSCALL_DEFINE4(truncate64, char __user *, filename, u32, dummy, |
ca768667 | 43 | SYSCALL_PAIR(length)) |
867e359b | 44 | { |
ca768667 | 45 | return sys_truncate(filename, ((loff_t)length_hi << 32) | length_lo); |
867e359b CM |
46 | } |
47 | ||
87c319a2 | 48 | COMPAT_SYSCALL_DEFINE4(ftruncate64, unsigned int, fd, u32, dummy, |
ca768667 | 49 | SYSCALL_PAIR(length)) |
867e359b | 50 | { |
ca768667 | 51 | return sys_ftruncate(fd, ((loff_t)length_hi << 32) | length_lo); |
867e359b CM |
52 | } |
53 | ||
87c319a2 | 54 | COMPAT_SYSCALL_DEFINE6(pread64, unsigned int, fd, char __user *, ubuf, |
ca768667 | 55 | size_t, count, u32, dummy, SYSCALL_PAIR(offset)) |
867e359b | 56 | { |
ca768667 CM |
57 | return sys_pread64(fd, ubuf, count, |
58 | ((loff_t)offset_hi << 32) | offset_lo); | |
867e359b CM |
59 | } |
60 | ||
87c319a2 | 61 | COMPAT_SYSCALL_DEFINE6(pwrite64, unsigned int, fd, char __user *, ubuf, |
ca768667 | 62 | size_t, count, u32, dummy, SYSCALL_PAIR(offset)) |
867e359b | 63 | { |
ca768667 CM |
64 | return sys_pwrite64(fd, ubuf, count, |
65 | ((loff_t)offset_hi << 32) | offset_lo); | |
867e359b CM |
66 | } |
67 | ||
87c319a2 | 68 | COMPAT_SYSCALL_DEFINE6(sync_file_range2, int, fd, unsigned int, flags, |
ca768667 | 69 | SYSCALL_PAIR(offset), SYSCALL_PAIR(nbytes)) |
867e359b CM |
70 | { |
71 | return sys_sync_file_range(fd, ((loff_t)offset_hi << 32) | offset_lo, | |
72 | ((loff_t)nbytes_hi << 32) | nbytes_lo, | |
73 | flags); | |
74 | } | |
75 | ||
87c319a2 | 76 | COMPAT_SYSCALL_DEFINE6(fallocate, int, fd, int, mode, |
ca768667 | 77 | SYSCALL_PAIR(offset), SYSCALL_PAIR(len)) |
867e359b CM |
78 | { |
79 | return sys_fallocate(fd, mode, ((loff_t)offset_hi << 32) | offset_lo, | |
80 | ((loff_t)len_hi << 32) | len_lo); | |
81 | } | |
82 | ||
5a114b98 CM |
83 | /* |
84 | * Avoid bug in generic sys_llseek() that specifies offset_high and | |
85 | * offset_low as "unsigned long", thus making it possible to pass | |
86 | * a sign-extended high 32 bits in offset_low. | |
ca768667 CM |
87 | * Note that we do not use SYSCALL_PAIR here since glibc passes the |
88 | * high and low parts explicitly in that order. | |
5a114b98 | 89 | */ |
87c319a2 CM |
90 | COMPAT_SYSCALL_DEFINE5(llseek, unsigned int, fd, unsigned int, offset_high, |
91 | unsigned int, offset_low, loff_t __user *, result, | |
92 | unsigned int, origin) | |
5a114b98 CM |
93 | { |
94 | return sys_llseek(fd, offset_high, offset_low, result, origin); | |
95 | } | |
e823acc0 | 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 | |
5a114b98 | 104 | #define sys_llseek compat_sys_llseek |
867e359b | 105 | |
6b14e419 | 106 | /* Call the assembly trampolines where necessary. */ |
d929b6ae CM |
107 | #define compat_sys_rt_sigreturn _compat_sys_rt_sigreturn |
108 | #define sys_clone _sys_clone | |
109 | ||
0707ad30 CM |
110 | /* |
111 | * Note that we can't include <linux/unistd.h> here since the header | |
112 | * guard will defeat us; <asm/unistd.h> checks for __SYSCALL as well. | |
113 | */ | |
867e359b CM |
114 | void *compat_sys_call_table[__NR_syscalls] = { |
115 | [0 ... __NR_syscalls-1] = sys_ni_syscall, | |
116 | #include <asm/unistd.h> | |
117 | }; |