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/syscalls.h>
20 #include <linux/kdev_t.h>
22 #include <linux/fcntl.h>
23 #include <linux/uaccess.h>
24 #include <linux/signal.h>
25 #include <asm/syscalls.h>
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.
35 COMPAT_SYSCALL_DEFINE4(truncate64, char __user *, filename, u32, dummy,
38 return sys_truncate(filename, ((loff_t)high << 32) | low);
41 COMPAT_SYSCALL_DEFINE4(ftruncate64, unsigned int, fd, u32, dummy,
44 return sys_ftruncate(fd, ((loff_t)high << 32) | low);
47 COMPAT_SYSCALL_DEFINE6(pread64, unsigned int, fd, char __user *, ubuf,
48 size_t, count, u32, dummy, u32, low, u32, high)
50 return sys_pread64(fd, ubuf, count, ((loff_t)high << 32) | low);
53 COMPAT_SYSCALL_DEFINE6(pwrite64, unsigned int, fd, char __user *, ubuf,
54 size_t, count, u32, dummy, u32, low, u32, high)
56 return sys_pwrite64(fd, ubuf, count, ((loff_t)high << 32) | low);
59 COMPAT_SYSCALL_DEFINE4(lookup_dcookie, u32, low, u32, high,
60 char __user *, buf, size_t, len)
62 return sys_lookup_dcookie(((loff_t)high << 32) | low, buf, len);
65 COMPAT_SYSCALL_DEFINE6(sync_file_range2, int, fd, unsigned int, flags,
66 u32, offset_lo, u32, offset_hi,
67 u32, nbytes_lo, u32, nbytes_hi)
69 return sys_sync_file_range(fd, ((loff_t)offset_hi << 32) | offset_lo,
70 ((loff_t)nbytes_hi << 32) | nbytes_lo,
74 COMPAT_SYSCALL_DEFINE6(fallocate, int, fd, int, mode,
75 u32, offset_lo, u32, offset_hi,
76 u32, len_lo, u32, len_hi)
78 return sys_fallocate(fd, mode, ((loff_t)offset_hi << 32) | offset_lo,
79 ((loff_t)len_hi << 32) | len_lo);
83 * Avoid bug in generic sys_llseek() that specifies offset_high and
84 * offset_low as "unsigned long", thus making it possible to pass
85 * a sign-extended high 32 bits in offset_low.
87 COMPAT_SYSCALL_DEFINE5(llseek, unsigned int, fd, unsigned int, offset_high,
88 unsigned int, offset_low, loff_t __user *, result,
91 return sys_llseek(fd, offset_high, offset_low, result, origin);
94 /* Provide the compat syscall number to call mapping. */
96 #define __SYSCALL(nr, call) [nr] = (call),
98 /* See comments in sys.c */
99 #define compat_sys_fadvise64_64 sys32_fadvise64_64
100 #define compat_sys_readahead sys32_readahead
101 #define sys_llseek compat_sys_llseek
103 /* Call the assembly trampolines where necessary. */
104 #define compat_sys_rt_sigreturn _compat_sys_rt_sigreturn
105 #define sys_clone _sys_clone
108 * Note that we can't include <linux/unistd.h> here since the header
109 * guard will defeat us; <asm/unistd.h> checks for __SYSCALL as well.
111 void *compat_sys_call_table[__NR_syscalls] = {
112 [0 ... __NR_syscalls-1] = sys_ni_syscall,
113 #include <asm/unistd.h>