]>
git.proxmox.com Git - mirror_ubuntu-artful-kernel.git/blob - arch/mips/kernel/linux32.c
2 * Conversion between 32-bit and 64-bit native system calls.
4 * Copyright (C) 2000 Silicon Graphics, Inc.
5 * Written by Ulf Carlsson (ulfc@engr.sgi.com)
7 #include <linux/compiler.h>
9 #include <linux/errno.h>
10 #include <linux/file.h>
11 #include <linux/highuid.h>
12 #include <linux/resource.h>
13 #include <linux/highmem.h>
14 #include <linux/time.h>
15 #include <linux/times.h>
16 #include <linux/poll.h>
17 #include <linux/skbuff.h>
18 #include <linux/filter.h>
19 #include <linux/shm.h>
20 #include <linux/sem.h>
21 #include <linux/msg.h>
22 #include <linux/icmpv6.h>
23 #include <linux/syscalls.h>
24 #include <linux/sysctl.h>
25 #include <linux/utime.h>
26 #include <linux/utsname.h>
27 #include <linux/personality.h>
28 #include <linux/dnotify.h>
29 #include <linux/module.h>
30 #include <linux/binfmts.h>
31 #include <linux/security.h>
32 #include <linux/compat.h>
33 #include <linux/vfs.h>
34 #include <linux/ipc.h>
35 #include <linux/slab.h>
40 #include <asm/compat-signal.h>
42 #include <asm/uaccess.h>
43 #include <asm/mmu_context.h>
46 /* Use this to get at 32-bit user passed pointers. */
47 /* A() macro should be used for places where you e.g.
48 have some internal variable u32 and just want to get
49 rid of a compiler warning. AA() has to be used in
50 places where you want to convert a function argument
51 to 32bit pointer or when you e.g. access pt_regs
52 structure and want to consider 32bit registers only.
54 #define A(__x) ((unsigned long)(__x))
55 #define AA(__x) ((unsigned long)((int)__x))
58 #define merge_64(r1, r2) ((((r1) & 0xffffffffUL) << 32) + ((r2) & 0xffffffffUL))
61 #define merge_64(r1, r2) ((((r2) & 0xffffffffUL) << 32) + ((r1) & 0xffffffffUL))
64 SYSCALL_DEFINE6(32_mmap2
, unsigned long, addr
, unsigned long, len
,
65 unsigned long, prot
, unsigned long, flags
, unsigned long, fd
,
71 if (pgoff
& (~PAGE_MASK
>> 12))
73 error
= sys_mmap_pgoff(addr
, len
, prot
, flags
, fd
,
74 pgoff
>> (PAGE_SHIFT
-12));
79 #define RLIM_INFINITY32 0x7fffffff
80 #define RESOURCE32(x) ((x > RLIM_INFINITY32) ? RLIM_INFINITY32 : x)
87 SYSCALL_DEFINE4(32_truncate64
, const char __user
*, path
,
88 unsigned long, __dummy
, unsigned long, a2
, unsigned long, a3
)
90 return sys_truncate(path
, merge_64(a2
, a3
));
93 SYSCALL_DEFINE4(32_ftruncate64
, unsigned long, fd
, unsigned long, __dummy
,
94 unsigned long, a2
, unsigned long, a3
)
96 return sys_ftruncate(fd
, merge_64(a2
, a3
));
99 SYSCALL_DEFINE5(32_llseek
, unsigned int, fd
, unsigned int, offset_high
,
100 unsigned int, offset_low
, loff_t __user
*, result
,
101 unsigned int, origin
)
103 return sys_llseek(fd
, offset_high
, offset_low
, result
, origin
);
106 /* From the Single Unix Spec: pread & pwrite act like lseek to pos + op +
107 lseek back to original location. They fail just like lseek does on
108 non-seekable files. */
110 SYSCALL_DEFINE6(32_pread
, unsigned long, fd
, char __user
*, buf
, size_t, count
,
111 unsigned long, unused
, unsigned long, a4
, unsigned long, a5
)
113 return sys_pread64(fd
, buf
, count
, merge_64(a4
, a5
));
116 SYSCALL_DEFINE6(32_pwrite
, unsigned int, fd
, const char __user
*, buf
,
117 size_t, count
, u32
, unused
, u64
, a4
, u64
, a5
)
119 return sys_pwrite64(fd
, buf
, count
, merge_64(a4
, a5
));
122 SYSCALL_DEFINE1(32_personality
, unsigned long, personality
)
124 unsigned int p
= personality
& 0xffffffff;
127 if (personality(current
->personality
) == PER_LINUX32
&&
128 personality(p
) == PER_LINUX
)
129 p
= (p
& ~PER_MASK
) | PER_LINUX32
;
130 ret
= sys_personality(p
);
131 if (ret
!= -1 && personality(ret
) == PER_LINUX32
)
132 ret
= (ret
& ~PER_MASK
) | PER_LINUX
;
136 asmlinkage ssize_t
sys32_readahead(int fd
, u32 pad0
, u64 a2
, u64 a3
,
139 return sys_readahead(fd
, merge_64(a2
, a3
), count
);
142 asmlinkage
long sys32_sync_file_range(int fd
, int __pad
,
143 unsigned long a2
, unsigned long a3
,
144 unsigned long a4
, unsigned long a5
,
147 return sys_sync_file_range(fd
,
148 merge_64(a2
, a3
), merge_64(a4
, a5
),
152 asmlinkage
long sys32_fadvise64_64(int fd
, int __pad
,
153 unsigned long a2
, unsigned long a3
,
154 unsigned long a4
, unsigned long a5
,
157 return sys_fadvise64_64(fd
,
158 merge_64(a2
, a3
), merge_64(a4
, a5
),
162 asmlinkage
long sys32_fallocate(int fd
, int mode
, unsigned offset_a2
,
163 unsigned offset_a3
, unsigned len_a4
, unsigned len_a5
)
165 return sys_fallocate(fd
, mode
, merge_64(offset_a2
, offset_a3
),
166 merge_64(len_a4
, len_a5
));