1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * Conversion between 32-bit and 64-bit native system calls.
4 *
5 * Copyright (C) 2000 Silicon Graphics, Inc.
6 * Written by Ulf Carlsson (ulfc@engr.sgi.com)
7 */
8 #include <linux/compiler.h>
9 #include <linux/mm.h>
10 #include <linux/errno.h>
11 #include <linux/file.h>
12 #include <linux/highuid.h>
13 #include <linux/resource.h>
14 #include <linux/highmem.h>
15 #include <linux/time.h>
16 #include <linux/times.h>
17 #include <linux/poll.h>
18 #include <linux/skbuff.h>
19 #include <linux/filter.h>
20 #include <linux/shm.h>
21 #include <linux/sem.h>
22 #include <linux/msg.h>
23 #include <linux/icmpv6.h>
24 #include <linux/syscalls.h>
25 #include <linux/sysctl.h>
26 #include <linux/utime.h>
27 #include <linux/utsname.h>
28 #include <linux/personality.h>
29 #include <linux/dnotify.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 <linux/uaccess.h>
43 #include <asm/mmu_context.h>
44 #include <asm/mman.h>
45
46 #ifdef __MIPSEB__
47 #define merge_64(r1, r2) ((((r1) & 0xffffffffUL) << 32) + ((r2) & 0xffffffffUL))
48 #endif
49 #ifdef __MIPSEL__
50 #define merge_64(r1, r2) ((((r2) & 0xffffffffUL) << 32) + ((r1) & 0xffffffffUL))
51 #endif
52
53 SYSCALL_DEFINE4(32_truncate64, const char __user *, path,
54 unsigned long, __dummy, unsigned long, a2, unsigned long, a3)
55 {
56 return ksys_truncate(path, merge_64(a2, a3));
57 }
58
59 SYSCALL_DEFINE4(32_ftruncate64, unsigned long, fd, unsigned long, __dummy,
60 unsigned long, a2, unsigned long, a3)
61 {
62 return ksys_ftruncate(fd, merge_64(a2, a3));
63 }
64
65 SYSCALL_DEFINE5(32_llseek, unsigned int, fd, unsigned int, offset_high,
66 unsigned int, offset_low, loff_t __user *, result,
67 unsigned int, origin)
68 {
69 return sys_llseek(fd, offset_high, offset_low, result, origin);
70 }
71
72 /* From the Single Unix Spec: pread & pwrite act like lseek to pos + op +
73 lseek back to original location. They fail just like lseek does on
74 non-seekable files. */
75
76 SYSCALL_DEFINE6(32_pread, unsigned long, fd, char __user *, buf, size_t, count,
77 unsigned long, unused, unsigned long, a4, unsigned long, a5)
78 {
79 return ksys_pread64(fd, buf, count, merge_64(a4, a5));
80 }
81
82 SYSCALL_DEFINE6(32_pwrite, unsigned int, fd, const char __user *, buf,
83 size_t, count, u32, unused, u64, a4, u64, a5)
84 {
85 return ksys_pwrite64(fd, buf, count, merge_64(a4, a5));
86 }
87
88 SYSCALL_DEFINE1(32_personality, unsigned long, personality)
89 {
90 unsigned int p = personality & 0xffffffff;
91 int ret;
92
93 if (personality(current->personality) == PER_LINUX32 &&
94 personality(p) == PER_LINUX)
95 p = (p & ~PER_MASK) | PER_LINUX32;
96 ret = sys_personality(p);
97 if (ret != -1 && personality(ret) == PER_LINUX32)
98 ret = (ret & ~PER_MASK) | PER_LINUX;
99 return ret;
100 }
101
sys32_readahead(int fd,u32 pad0,u64 a2,u64 a3,size_t count)102 asmlinkage ssize_t sys32_readahead(int fd, u32 pad0, u64 a2, u64 a3,
103 size_t count)
104 {
105 return ksys_readahead(fd, merge_64(a2, a3), count);
106 }
107
sys32_sync_file_range(int fd,int __pad,unsigned long a2,unsigned long a3,unsigned long a4,unsigned long a5,int flags)108 asmlinkage long sys32_sync_file_range(int fd, int __pad,
109 unsigned long a2, unsigned long a3,
110 unsigned long a4, unsigned long a5,
111 int flags)
112 {
113 return ksys_sync_file_range(fd,
114 merge_64(a2, a3), merge_64(a4, a5),
115 flags);
116 }
117
sys32_fadvise64_64(int fd,int __pad,unsigned long a2,unsigned long a3,unsigned long a4,unsigned long a5,int flags)118 asmlinkage long sys32_fadvise64_64(int fd, int __pad,
119 unsigned long a2, unsigned long a3,
120 unsigned long a4, unsigned long a5,
121 int flags)
122 {
123 return ksys_fadvise64_64(fd,
124 merge_64(a2, a3), merge_64(a4, a5),
125 flags);
126 }
127
sys32_fallocate(int fd,int mode,unsigned offset_a2,unsigned offset_a3,unsigned len_a4,unsigned len_a5)128 asmlinkage long sys32_fallocate(int fd, int mode, unsigned offset_a2,
129 unsigned offset_a3, unsigned len_a4, unsigned len_a5)
130 {
131 return ksys_fallocate(fd, mode, merge_64(offset_a2, offset_a3),
132 merge_64(len_a4, len_a5));
133 }
134
