1 /*
2 * Conversion between 32-bit and 64-bit native system calls.
3 *
4 * Copyright (C) 2000 Silicon Graphics, Inc.
5 * Written by Ulf Carlsson (ulfc@engr.sgi.com)
6 */
7 #include <linux/compiler.h>
8 #include <linux/mm.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/binfmts.h>
30 #include <linux/security.h>
31 #include <linux/compat.h>
32 #include <linux/vfs.h>
33 #include <linux/ipc.h>
34 #include <linux/slab.h>
35
36 #include <net/sock.h>
37 #include <net/scm.h>
38
39 #include <asm/compat-signal.h>
40 #include <asm/sim.h>
41 #include <asm/uaccess.h>
42 #include <asm/mmu_context.h>
43 #include <asm/mman.h>
44
45 /* Use this to get at 32-bit user passed pointers. */
46 /* A() macro should be used for places where you e.g.
47 have some internal variable u32 and just want to get
48 rid of a compiler warning. AA() has to be used in
49 places where you want to convert a function argument
50 to 32bit pointer or when you e.g. access pt_regs
51 structure and want to consider 32bit registers only.
52 */
53 #define A(__x) ((unsigned long)(__x))
54 #define AA(__x) ((unsigned long)((int)__x))
55
56 #ifdef __MIPSEB__
57 #define merge_64(r1, r2) ((((r1) & 0xffffffffUL) << 32) + ((r2) & 0xffffffffUL))
58 #endif
59 #ifdef __MIPSEL__
60 #define merge_64(r1, r2) ((((r2) & 0xffffffffUL) << 32) + ((r1) & 0xffffffffUL))
61 #endif
62
63 SYSCALL_DEFINE6(32_mmap2, unsigned long, addr, unsigned long, len,
64 unsigned long, prot, unsigned long, flags, unsigned long, fd,
65 unsigned long, pgoff)
66 {
67 unsigned long error;
68
69 error = -EINVAL;
70 if (pgoff & (~PAGE_MASK >> 12))
71 goto out;
72 error = sys_mmap_pgoff(addr, len, prot, flags, fd,
73 pgoff >> (PAGE_SHIFT-12));
74 out:
75 return error;
76 }
77
78 #define RLIM_INFINITY32 0x7fffffff
79 #define RESOURCE32(x) ((x > RLIM_INFINITY32) ? RLIM_INFINITY32 : x)
80
81 struct rlimit32 {
82 int rlim_cur;
83 int rlim_max;
84 };
85
86 SYSCALL_DEFINE4(32_truncate64, const char __user *, path,
87 unsigned long, __dummy, unsigned long, a2, unsigned long, a3)
88 {
89 return sys_truncate(path, merge_64(a2, a3));
90 }
91
92 SYSCALL_DEFINE4(32_ftruncate64, unsigned long, fd, unsigned long, __dummy,
93 unsigned long, a2, unsigned long, a3)
94 {
95 return sys_ftruncate(fd, merge_64(a2, a3));
96 }
97
98 SYSCALL_DEFINE5(32_llseek, unsigned int, fd, unsigned int, offset_high,
99 unsigned int, offset_low, loff_t __user *, result,
100 unsigned int, origin)
101 {
102 return sys_llseek(fd, offset_high, offset_low, result, origin);
103 }
104
105 /* From the Single Unix Spec: pread & pwrite act like lseek to pos + op +
106 lseek back to original location. They fail just like lseek does on
107 non-seekable files. */
108
109 SYSCALL_DEFINE6(32_pread, unsigned long, fd, char __user *, buf, size_t, count,
110 unsigned long, unused, unsigned long, a4, unsigned long, a5)
111 {
112 return sys_pread64(fd, buf, count, merge_64(a4, a5));
113 }
114
115 SYSCALL_DEFINE6(32_pwrite, unsigned int, fd, const char __user *, buf,
116 size_t, count, u32, unused, u64, a4, u64, a5)
117 {
118 return sys_pwrite64(fd, buf, count, merge_64(a4, a5));
119 }
120
121 SYSCALL_DEFINE1(32_personality, unsigned long, personality)
122 {
123 unsigned int p = personality & 0xffffffff;
124 int ret;
125
126 if (personality(current->personality) == PER_LINUX32 &&
127 personality(p) == PER_LINUX)
128 p = (p & ~PER_MASK) | PER_LINUX32;
129 ret = sys_personality(p);
130 if (ret != -1 && personality(ret) == PER_LINUX32)
131 ret = (ret & ~PER_MASK) | PER_LINUX;
132 return ret;
133 }
134
sys32_readahead(int fd,u32 pad0,u64 a2,u64 a3,size_t count)135 asmlinkage ssize_t sys32_readahead(int fd, u32 pad0, u64 a2, u64 a3,
136 size_t count)
137 {
138 return sys_readahead(fd, merge_64(a2, a3), count);
139 }
140
sys32_sync_file_range(int fd,int __pad,unsigned long a2,unsigned long a3,unsigned long a4,unsigned long a5,int flags)141 asmlinkage long sys32_sync_file_range(int fd, int __pad,
142 unsigned long a2, unsigned long a3,
143 unsigned long a4, unsigned long a5,
144 int flags)
145 {
146 return sys_sync_file_range(fd,
147 merge_64(a2, a3), merge_64(a4, a5),
148 flags);
149 }
150
sys32_fadvise64_64(int fd,int __pad,unsigned long a2,unsigned long a3,unsigned long a4,unsigned long a5,int flags)151 asmlinkage long sys32_fadvise64_64(int fd, int __pad,
152 unsigned long a2, unsigned long a3,
153 unsigned long a4, unsigned long a5,
154 int flags)
155 {
156 return sys_fadvise64_64(fd,
157 merge_64(a2, a3), merge_64(a4, a5),
158 flags);
159 }
160
sys32_fallocate(int fd,int mode,unsigned offset_a2,unsigned offset_a3,unsigned len_a4,unsigned len_a5)161 asmlinkage long sys32_fallocate(int fd, int mode, unsigned offset_a2,
162 unsigned offset_a3, unsigned len_a4, unsigned len_a5)
163 {
164 return sys_fallocate(fd, mode, merge_64(offset_a2, offset_a3),
165 merge_64(len_a4, len_a5));
166 }
167