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/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>
36
37#include <net/sock.h>
38#include <net/scm.h>
39
40#include <asm/compat-signal.h>
41#include <asm/sim.h>
42#include <asm/uaccess.h>
43#include <asm/mmu_context.h>
44#include <asm/mman.h>
45
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.
53 */
54#define A(__x) ((unsigned long)(__x))
55#define AA(__x) ((unsigned long)((int)__x))
56
57#ifdef __MIPSEB__
58#define merge_64(r1, r2) ((((r1) & 0xffffffffUL) << 32) + ((r2) & 0xffffffffUL))
59#endif
60#ifdef __MIPSEL__
61#define merge_64(r1, r2) ((((r2) & 0xffffffffUL) << 32) + ((r1) & 0xffffffffUL))
62#endif
63
64SYSCALL_DEFINE6(32_mmap2, unsigned long, addr, unsigned long, len,
65	unsigned long, prot, unsigned long, flags, unsigned long, fd,
66	unsigned long, pgoff)
67{
68	unsigned long error;
69
70	error = -EINVAL;
71	if (pgoff & (~PAGE_MASK >> 12))
72		goto out;
73	error = sys_mmap_pgoff(addr, len, prot, flags, fd,
74			       pgoff >> (PAGE_SHIFT-12));
75out:
76	return error;
77}
78
79#define RLIM_INFINITY32 0x7fffffff
80#define RESOURCE32(x) ((x > RLIM_INFINITY32) ? RLIM_INFINITY32 : x)
81
82struct rlimit32 {
83	int	rlim_cur;
84	int	rlim_max;
85};
86
87SYSCALL_DEFINE4(32_truncate64, const char __user *, path,
88	unsigned long, __dummy, unsigned long, a2, unsigned long, a3)
89{
90	return sys_truncate(path, merge_64(a2, a3));
91}
92
93SYSCALL_DEFINE4(32_ftruncate64, unsigned long, fd, unsigned long, __dummy,
94	unsigned long, a2, unsigned long, a3)
95{
96	return sys_ftruncate(fd, merge_64(a2, a3));
97}
98
99SYSCALL_DEFINE5(32_llseek, unsigned int, fd, unsigned int, offset_high,
100		unsigned int, offset_low, loff_t __user *, result,
101		unsigned int, origin)
102{
103	return sys_llseek(fd, offset_high, offset_low, result, origin);
104}
105
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.	*/
109
110SYSCALL_DEFINE6(32_pread, unsigned long, fd, char __user *, buf, size_t, count,
111	unsigned long, unused, unsigned long, a4, unsigned long, a5)
112{
113	return sys_pread64(fd, buf, count, merge_64(a4, a5));
114}
115
116SYSCALL_DEFINE6(32_pwrite, unsigned int, fd, const char __user *, buf,
117	size_t, count, u32, unused, u64, a4, u64, a5)
118{
119	return sys_pwrite64(fd, buf, count, merge_64(a4, a5));
120}
121
122SYSCALL_DEFINE1(32_personality, unsigned long, personality)
123{
124	unsigned int p = personality & 0xffffffff;
125	int ret;
126
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;
133	return ret;
134}
135
136asmlinkage ssize_t sys32_readahead(int fd, u32 pad0, u64 a2, u64 a3,
137				   size_t count)
138{
139	return sys_readahead(fd, merge_64(a2, a3), count);
140}
141
142asmlinkage long sys32_sync_file_range(int fd, int __pad,
143	unsigned long a2, unsigned long a3,
144	unsigned long a4, unsigned long a5,
145	int flags)
146{
147	return sys_sync_file_range(fd,
148			merge_64(a2, a3), merge_64(a4, a5),
149			flags);
150}
151
152asmlinkage long sys32_fadvise64_64(int fd, int __pad,
153	unsigned long a2, unsigned long a3,
154	unsigned long a4, unsigned long a5,
155	int flags)
156{
157	return sys_fadvise64_64(fd,
158			merge_64(a2, a3), merge_64(a4, a5),
159			flags);
160}
161
162asmlinkage long sys32_fallocate(int fd, int mode, unsigned offset_a2,
163	unsigned offset_a3, unsigned len_a4, unsigned len_a5)
164{
165	return sys_fallocate(fd, mode, merge_64(offset_a2, offset_a3),
166			     merge_64(len_a4, len_a5));
167}
168