2 * Conversion between 32-bit and 64-bit native system calls.
4 * Copyright (C) 2000 Silicon Graphics, Inc.
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/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>
39 #include <asm/compat-signal.h>
41 #include <linux/uaccess.h>
42 #include <asm/mmu_context.h>
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.
53 #define A(__x) ((unsigned long)(__x))
54 #define AA(__x) ((unsigned long)((int)__x))
57 #define merge_64(r1, r2) ((((r1) & 0xffffffffUL) << 32) + ((r2) & 0xffffffffUL))
60 #define merge_64(r1, r2) ((((r2) & 0xffffffffUL) << 32) + ((r1) & 0xffffffffUL))
63 SYSCALL_DEFINE6(32_mmap2, unsigned long, addr, unsigned long, len,
64 unsigned long, prot, unsigned long, flags, unsigned long, fd,
67 if (pgoff & (~PAGE_MASK >> 12))
69 return sys_mmap_pgoff(addr, len, prot, flags, fd,
70 pgoff >> (PAGE_SHIFT-12));
73 #define RLIM_INFINITY32 0x7fffffff
74 #define RESOURCE32(x) ((x > RLIM_INFINITY32) ? RLIM_INFINITY32 : x)
81 SYSCALL_DEFINE4(32_truncate64, const char __user *, path,
82 unsigned long, __dummy, unsigned long, a2, unsigned long, a3)
84 return sys_truncate(path, merge_64(a2, a3));
87 SYSCALL_DEFINE4(32_ftruncate64, unsigned long, fd, unsigned long, __dummy,
88 unsigned long, a2, unsigned long, a3)
90 return sys_ftruncate(fd, merge_64(a2, a3));
93 SYSCALL_DEFINE5(32_llseek, unsigned int, fd, unsigned int, offset_high,
94 unsigned int, offset_low, loff_t __user *, result,
97 return sys_llseek(fd, offset_high, offset_low, result, origin);
100 /* From the Single Unix Spec: pread & pwrite act like lseek to pos + op +
101 lseek back to original location. They fail just like lseek does on
102 non-seekable files. */
104 SYSCALL_DEFINE6(32_pread, unsigned long, fd, char __user *, buf, size_t, count,
105 unsigned long, unused, unsigned long, a4, unsigned long, a5)
107 return sys_pread64(fd, buf, count, merge_64(a4, a5));
110 SYSCALL_DEFINE6(32_pwrite, unsigned int, fd, const char __user *, buf,
111 size_t, count, u32, unused, u64, a4, u64, a5)
113 return sys_pwrite64(fd, buf, count, merge_64(a4, a5));
116 SYSCALL_DEFINE1(32_personality, unsigned long, personality)
118 unsigned int p = personality & 0xffffffff;
121 if (personality(current->personality) == PER_LINUX32 &&
122 personality(p) == PER_LINUX)
123 p = (p & ~PER_MASK) | PER_LINUX32;
124 ret = sys_personality(p);
125 if (ret != -1 && personality(ret) == PER_LINUX32)
126 ret = (ret & ~PER_MASK) | PER_LINUX;
130 asmlinkage ssize_t sys32_readahead(int fd, u32 pad0, u64 a2, u64 a3,
133 return sys_readahead(fd, merge_64(a2, a3), count);
136 asmlinkage long sys32_sync_file_range(int fd, int __pad,
137 unsigned long a2, unsigned long a3,
138 unsigned long a4, unsigned long a5,
141 return sys_sync_file_range(fd,
142 merge_64(a2, a3), merge_64(a4, a5),
146 asmlinkage long sys32_fadvise64_64(int fd, int __pad,
147 unsigned long a2, unsigned long a3,
148 unsigned long a4, unsigned long a5,
151 return sys_fadvise64_64(fd,
152 merge_64(a2, a3), merge_64(a4, a5),
156 asmlinkage long sys32_fallocate(int fd, int mode, unsigned offset_a2,
157 unsigned offset_a3, unsigned len_a4, unsigned len_a5)
159 return sys_fallocate(fd, mode, merge_64(offset_a2, offset_a3),
160 merge_64(len_a4, len_a5));