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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> | |
19 | #include <linux/msg.h> | |
20 | #include <linux/syscalls.h> | |
21 | #include <linux/kdev_t.h> | |
22 | #include <linux/fs.h> | |
23 | #include <linux/fcntl.h> | |
24 | #include <linux/smp_lock.h> | |
25 | #include <linux/uaccess.h> | |
26 | #include <linux/signal.h> | |
27 | #include <asm/syscalls.h> | |
28 | ||
29 | /* | |
30 | * Syscalls that take 64-bit numbers traditionally take them in 32-bit | |
31 | * "high" and "low" value parts on 32-bit architectures. | |
32 | * In principle, one could imagine passing some register arguments as | |
33 | * fully 64-bit on TILE-Gx in 32-bit mode, but it seems easier to | |
34 | * adapt the usual convention. | |
35 | */ | |
36 | ||
37 | long compat_sys_truncate64(char __user *filename, u32 dummy, u32 low, u32 high) | |
38 | { | |
39 | return sys_truncate(filename, ((loff_t)high << 32) | low); | |
40 | } | |
41 | ||
42 | long compat_sys_ftruncate64(unsigned int fd, u32 dummy, u32 low, u32 high) | |
43 | { | |
44 | return sys_ftruncate(fd, ((loff_t)high << 32) | low); | |
45 | } | |
46 | ||
47 | long compat_sys_pread64(unsigned int fd, char __user *ubuf, size_t count, | |
48 | u32 dummy, u32 low, u32 high) | |
49 | { | |
50 | return sys_pread64(fd, ubuf, count, ((loff_t)high << 32) | low); | |
51 | } | |
52 | ||
53 | long compat_sys_pwrite64(unsigned int fd, char __user *ubuf, size_t count, | |
54 | u32 dummy, u32 low, u32 high) | |
55 | { | |
56 | return sys_pwrite64(fd, ubuf, count, ((loff_t)high << 32) | low); | |
57 | } | |
58 | ||
59 | long compat_sys_lookup_dcookie(u32 low, u32 high, char __user *buf, size_t len) | |
60 | { | |
61 | return sys_lookup_dcookie(((loff_t)high << 32) | low, buf, len); | |
62 | } | |
63 | ||
64 | long compat_sys_sync_file_range2(int fd, unsigned int flags, | |
65 | u32 offset_lo, u32 offset_hi, | |
66 | u32 nbytes_lo, u32 nbytes_hi) | |
67 | { | |
68 | return sys_sync_file_range(fd, ((loff_t)offset_hi << 32) | offset_lo, | |
69 | ((loff_t)nbytes_hi << 32) | nbytes_lo, | |
70 | flags); | |
71 | } | |
72 | ||
73 | long compat_sys_fallocate(int fd, int mode, | |
74 | u32 offset_lo, u32 offset_hi, | |
75 | u32 len_lo, u32 len_hi) | |
76 | { | |
77 | return sys_fallocate(fd, mode, ((loff_t)offset_hi << 32) | offset_lo, | |
78 | ((loff_t)len_hi << 32) | len_lo); | |
79 | } | |
80 | ||
81 | ||
82 | ||
83 | long compat_sys_sched_rr_get_interval(compat_pid_t pid, | |
84 | struct compat_timespec __user *interval) | |
85 | { | |
86 | struct timespec t; | |
87 | int ret; | |
88 | mm_segment_t old_fs = get_fs(); | |
89 | ||
90 | set_fs(KERNEL_DS); | |
0707ad30 CM |
91 | ret = sys_sched_rr_get_interval(pid, |
92 | (struct timespec __force __user *)&t); | |
867e359b CM |
93 | set_fs(old_fs); |
94 | if (put_compat_timespec(&t, interval)) | |
95 | return -EFAULT; | |
96 | return ret; | |
97 | } | |
98 | ||
867e359b CM |
99 | /* |
100 | * The usual compat_sys_msgsnd() and _msgrcv() seem to be assuming | |
101 | * some different calling convention than our normal 32-bit tile code. | |
102 | */ | |
103 | ||
104 | /* Already defined in ipc/compat.c, but we need it here. */ | |
105 | struct compat_msgbuf { | |
106 | compat_long_t mtype; | |
107 | char mtext[1]; | |
108 | }; | |
109 | ||
110 | long tile_compat_sys_msgsnd(int msqid, | |
111 | struct compat_msgbuf __user *msgp, | |
112 | size_t msgsz, int msgflg) | |
113 | { | |
114 | compat_long_t mtype; | |
115 | ||
116 | if (get_user(mtype, &msgp->mtype)) | |
117 | return -EFAULT; | |
118 | return do_msgsnd(msqid, mtype, msgp->mtext, msgsz, msgflg); | |
119 | } | |
120 | ||
121 | long tile_compat_sys_msgrcv(int msqid, | |
122 | struct compat_msgbuf __user *msgp, | |
123 | size_t msgsz, long msgtyp, int msgflg) | |
124 | { | |
125 | long err, mtype; | |
126 | ||
127 | err = do_msgrcv(msqid, &mtype, msgp->mtext, msgsz, msgtyp, msgflg); | |
128 | if (err < 0) | |
129 | goto out; | |
130 | ||
131 | if (put_user(mtype, &msgp->mtype)) | |
132 | err = -EFAULT; | |
133 | out: | |
134 | return err; | |
135 | } | |
136 | ||
137 | /* Provide the compat syscall number to call mapping. */ | |
138 | #undef __SYSCALL | |
139 | #define __SYSCALL(nr, call) [nr] = (compat_##call), | |
140 | ||
141 | /* The generic versions of these don't work for Tile. */ | |
142 | #define compat_sys_msgrcv tile_compat_sys_msgrcv | |
143 | #define compat_sys_msgsnd tile_compat_sys_msgsnd | |
144 | ||
145 | /* See comments in sys.c */ | |
146 | #define compat_sys_fadvise64 sys32_fadvise64 | |
147 | #define compat_sys_fadvise64_64 sys32_fadvise64_64 | |
148 | #define compat_sys_readahead sys32_readahead | |
149 | #define compat_sys_sync_file_range compat_sys_sync_file_range2 | |
150 | ||
151 | /* The native 64-bit "struct stat" matches the 32-bit "struct stat64". */ | |
152 | #define compat_sys_stat64 sys_newstat | |
153 | #define compat_sys_lstat64 sys_newlstat | |
154 | #define compat_sys_fstat64 sys_newfstat | |
155 | #define compat_sys_fstatat64 sys_newfstatat | |
156 | ||
157 | /* Pass full 64-bit values through ptrace. */ | |
158 | #define compat_sys_ptrace tile_compat_sys_ptrace | |
159 | ||
0707ad30 CM |
160 | /* |
161 | * Note that we can't include <linux/unistd.h> here since the header | |
162 | * guard will defeat us; <asm/unistd.h> checks for __SYSCALL as well. | |
163 | */ | |
867e359b CM |
164 | void *compat_sys_call_table[__NR_syscalls] = { |
165 | [0 ... __NR_syscalls-1] = sys_ni_syscall, | |
166 | #include <asm/unistd.h> | |
167 | }; |