2 * Copyright 2010 Tilera Corporation. All Rights Reserved.
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.
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
15 /* Adjust unistd.h to provide 32-bit numbers and functions. */
16 #define __SYSCALL_COMPAT
18 #include <linux/compat.h>
19 #include <linux/msg.h>
20 #include <linux/syscalls.h>
21 #include <linux/kdev_t.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>
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.
37 long compat_sys_truncate64(char __user
*filename
, u32 dummy
, u32 low
, u32 high
)
39 return sys_truncate(filename
, ((loff_t
)high
<< 32) | low
);
42 long compat_sys_ftruncate64(unsigned int fd
, u32 dummy
, u32 low
, u32 high
)
44 return sys_ftruncate(fd
, ((loff_t
)high
<< 32) | low
);
47 long compat_sys_pread64(unsigned int fd
, char __user
*ubuf
, size_t count
,
48 u32 dummy
, u32 low
, u32 high
)
50 return sys_pread64(fd
, ubuf
, count
, ((loff_t
)high
<< 32) | low
);
53 long compat_sys_pwrite64(unsigned int fd
, char __user
*ubuf
, size_t count
,
54 u32 dummy
, u32 low
, u32 high
)
56 return sys_pwrite64(fd
, ubuf
, count
, ((loff_t
)high
<< 32) | low
);
59 long compat_sys_lookup_dcookie(u32 low
, u32 high
, char __user
*buf
, size_t len
)
61 return sys_lookup_dcookie(((loff_t
)high
<< 32) | low
, buf
, len
);
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
)
68 return sys_sync_file_range(fd
, ((loff_t
)offset_hi
<< 32) | offset_lo
,
69 ((loff_t
)nbytes_hi
<< 32) | nbytes_lo
,
73 long compat_sys_fallocate(int fd
, int mode
,
74 u32 offset_lo
, u32 offset_hi
,
75 u32 len_lo
, u32 len_hi
)
77 return sys_fallocate(fd
, mode
, ((loff_t
)offset_hi
<< 32) | offset_lo
,
78 ((loff_t
)len_hi
<< 32) | len_lo
);
83 long compat_sys_sched_rr_get_interval(compat_pid_t pid
,
84 struct compat_timespec __user
*interval
)
88 mm_segment_t old_fs
= get_fs();
91 ret
= sys_sched_rr_get_interval(pid
,
92 (struct timespec __force __user
*)&t
);
94 if (put_compat_timespec(&t
, interval
))
100 * The usual compat_sys_msgsnd() and _msgrcv() seem to be assuming
101 * some different calling convention than our normal 32-bit tile code.
104 /* Already defined in ipc/compat.c, but we need it here. */
105 struct compat_msgbuf
{
110 long tile_compat_sys_msgsnd(int msqid
,
111 struct compat_msgbuf __user
*msgp
,
112 size_t msgsz
, int msgflg
)
116 if (get_user(mtype
, &msgp
->mtype
))
118 return do_msgsnd(msqid
, mtype
, msgp
->mtext
, msgsz
, msgflg
);
121 long tile_compat_sys_msgrcv(int msqid
,
122 struct compat_msgbuf __user
*msgp
,
123 size_t msgsz
, long msgtyp
, int msgflg
)
127 err
= do_msgrcv(msqid
, &mtype
, msgp
->mtext
, msgsz
, msgtyp
, msgflg
);
131 if (put_user(mtype
, &msgp
->mtype
))
137 /* Provide the compat syscall number to call mapping. */
139 #define __SYSCALL(nr, call) [nr] = (compat_##call),
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
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
151 /* We leverage the "struct stat64" type for 32-bit time_t/nsec. */
152 #define compat_sys_stat64 sys_stat64
153 #define compat_sys_lstat64 sys_lstat64
154 #define compat_sys_fstat64 sys_fstat64
155 #define compat_sys_fstatat64 sys_fstatat64
157 /* The native sys_ptrace dynamically handles compat binaries. */
158 #define compat_sys_ptrace sys_ptrace
160 /* Call the trampolines to manage pt_regs where necessary. */
161 #define compat_sys_execve _compat_sys_execve
162 #define compat_sys_sigaltstack _compat_sys_sigaltstack
163 #define compat_sys_rt_sigreturn _compat_sys_rt_sigreturn
164 #define sys_clone _sys_clone
167 * Note that we can't include <linux/unistd.h> here since the header
168 * guard will defeat us; <asm/unistd.h> checks for __SYSCALL as well.
170 void *compat_sys_call_table
[__NR_syscalls
] = {
171 [0 ... __NR_syscalls
-1] = sys_ni_syscall
,
172 #include <asm/unistd.h>