blob: 0352f742d07714fda6d1a758f92886e7977b53de [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
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)
Linus Torvalds1da177e2005-04-16 15:20:36 -07006 */
Linus Torvalds1da177e2005-04-16 15:20:36 -07007#include <linux/compiler.h>
8#include <linux/mm.h>
9#include <linux/errno.h>
10#include <linux/file.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070011#include <linux/highuid.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070012#include <linux/resource.h>
13#include <linux/highmem.h>
14#include <linux/time.h>
15#include <linux/times.h>
16#include <linux/poll.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070017#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>
Linus Torvalds1da177e2005-04-16 15:20:36 -070028#include <linux/dnotify.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070029#include <linux/binfmts.h>
30#include <linux/security.h>
31#include <linux/compat.h>
32#include <linux/vfs.h>
Adrian Bunkcba4fbb2007-10-16 23:29:24 -070033#include <linux/ipc.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090034#include <linux/slab.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070035
36#include <net/sock.h>
37#include <net/scm.h>
38
Ralf Baechle431dc802007-02-13 00:05:11 +000039#include <asm/compat-signal.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070040#include <asm/sim.h>
Linus Torvalds7c0f6ba2016-12-24 11:46:01 -080041#include <linux/uaccess.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070042#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__
Ralf Baechle21a151d2007-10-11 23:46:15 +010057#define merge_64(r1, r2) ((((r1) & 0xffffffffUL) << 32) + ((r2) & 0xffffffffUL))
Linus Torvalds1da177e2005-04-16 15:20:36 -070058#endif
59#ifdef __MIPSEL__
Ralf Baechle21a151d2007-10-11 23:46:15 +010060#define merge_64(r1, r2) ((((r2) & 0xffffffffUL) << 32) + ((r1) & 0xffffffffUL))
Linus Torvalds1da177e2005-04-16 15:20:36 -070061#endif
62
Ralf Baechledbda6ac2009-02-08 16:00:26 +000063SYSCALL_DEFINE6(32_mmap2, unsigned long, addr, unsigned long, len,
64 unsigned long, prot, unsigned long, flags, unsigned long, fd,
65 unsigned long, pgoff)
Linus Torvalds1da177e2005-04-16 15:20:36 -070066{
Linus Torvalds1da177e2005-04-16 15:20:36 -070067 unsigned long error;
68
69 error = -EINVAL;
H. Peter Anvin947df172006-02-24 21:20:29 -080070 if (pgoff & (~PAGE_MASK >> 12))
71 goto out;
Al Virof8b72562009-11-30 17:37:04 -050072 error = sys_mmap_pgoff(addr, len, prot, flags, fd,
73 pgoff >> (PAGE_SHIFT-12));
Linus Torvalds1da177e2005-04-16 15:20:36 -070074out:
75 return error;
76}
77
Ralf Baechle70342282013-01-22 12:59:30 +010078#define RLIM_INFINITY32 0x7fffffff
Linus Torvalds1da177e2005-04-16 15:20:36 -070079#define RESOURCE32(x) ((x > RLIM_INFINITY32) ? RLIM_INFINITY32 : x)
80
81struct rlimit32 {
82 int rlim_cur;
83 int rlim_max;
84};
85
Ralf Baechledbda6ac2009-02-08 16:00:26 +000086SYSCALL_DEFINE4(32_truncate64, const char __user *, path,
87 unsigned long, __dummy, unsigned long, a2, unsigned long, a3)
Linus Torvalds1da177e2005-04-16 15:20:36 -070088{
Ralf Baechled4e9cff2008-01-29 10:15:02 +000089 return sys_truncate(path, merge_64(a2, a3));
Linus Torvalds1da177e2005-04-16 15:20:36 -070090}
91
Ralf Baechledbda6ac2009-02-08 16:00:26 +000092SYSCALL_DEFINE4(32_ftruncate64, unsigned long, fd, unsigned long, __dummy,
93 unsigned long, a2, unsigned long, a3)
Linus Torvalds1da177e2005-04-16 15:20:36 -070094{
Ralf Baechled4e9cff2008-01-29 10:15:02 +000095 return sys_ftruncate(fd, merge_64(a2, a3));
Linus Torvalds1da177e2005-04-16 15:20:36 -070096}
97
Ralf Baechled6c178e2009-03-28 01:36:09 +010098SYSCALL_DEFINE5(32_llseek, unsigned int, fd, unsigned int, offset_high,
99 unsigned int, offset_low, loff_t __user *, result,
100 unsigned int, origin)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700101{
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
Ralf Baechle70342282013-01-22 12:59:30 +0100107 non-seekable files. */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700108
Ralf Baechledbda6ac2009-02-08 16:00:26 +0000109SYSCALL_DEFINE6(32_pread, unsigned long, fd, char __user *, buf, size_t, count,
110 unsigned long, unused, unsigned long, a4, unsigned long, a5)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700111{
Al Viro6ad00132006-04-26 07:28:09 +0100112 return sys_pread64(fd, buf, count, merge_64(a4, a5));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700113}
114
Ralf Baechledbda6ac2009-02-08 16:00:26 +0000115SYSCALL_DEFINE6(32_pwrite, unsigned int, fd, const char __user *, buf,
116 size_t, count, u32, unused, u64, a4, u64, a5)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700117{
Al Viro6ad00132006-04-26 07:28:09 +0100118 return sys_pwrite64(fd, buf, count, merge_64(a4, a5));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700119}
120
Ralf Baechledbda6ac2009-02-08 16:00:26 +0000121SYSCALL_DEFINE1(32_personality, unsigned long, personality)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700122{
David Daneyd62c9ce2010-11-01 17:43:08 -0700123 unsigned int p = personality & 0xffffffff;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700124 int ret;
David Daneyd62c9ce2010-11-01 17:43:08 -0700125
Thiemo Seufer53571ce2006-08-13 00:53:29 +0100126 if (personality(current->personality) == PER_LINUX32 &&
David Daneyd62c9ce2010-11-01 17:43:08 -0700127 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;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700132 return ret;
133}
134
Linus Torvalds1da177e2005-04-16 15:20:36 -0700135asmlinkage ssize_t sys32_readahead(int fd, u32 pad0, u64 a2, u64 a3,
Ralf Baechle70342282013-01-22 12:59:30 +0100136 size_t count)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700137{
138 return sys_readahead(fd, merge_64(a2, a3), count);
139}
140
Ralf Baechlea8d587a2006-04-01 07:49:21 +0100141asmlinkage 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
Atsushi Nemoto8676d2e2007-05-18 00:46:13 +0900151asmlinkage 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
Ralf Baechle4dc46772007-07-26 03:38:24 +0100161asmlinkage 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),
Ralf Baechle70342282013-01-22 12:59:30 +0100165 merge_64(len_a4, len_a5));
Ralf Baechle4dc46772007-07-26 03:38:24 +0100166}