2 * sys_ppc32.c: Conversion between 32bit and 64bit native syscalls.
4 * Copyright (C) 2001 IBM
5 * Copyright (C) 1997,1998 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
6 * Copyright (C) 1997 David S. Miller (davem@caip.rutgers.edu)
8 * These routines maintain argument size conversion between 32bit and 64bit
11 * This program is free software; you can redistribute it and/or
12 * modify it under the terms of the GNU General Public License
13 * as published by the Free Software Foundation; either version
14 * 2 of the License, or (at your option) any later version.
17 #include <linux/kernel.h>
18 #include <linux/sched.h>
21 #include <linux/file.h>
22 #include <linux/signal.h>
23 #include <linux/resource.h>
24 #include <linux/times.h>
25 #include <linux/smp.h>
26 #include <linux/sem.h>
27 #include <linux/msg.h>
28 #include <linux/shm.h>
29 #include <linux/poll.h>
30 #include <linux/personality.h>
31 #include <linux/stat.h>
32 #include <linux/mman.h>
34 #include <linux/syscalls.h>
35 #include <linux/unistd.h>
36 #include <linux/sysctl.h>
37 #include <linux/binfmts.h>
38 #include <linux/security.h>
39 #include <linux/compat.h>
40 #include <linux/ptrace.h>
41 #include <linux/elf.h>
42 #include <linux/ipc.h>
43 #include <linux/slab.h>
45 #include <asm/ptrace.h>
46 #include <asm/types.h>
47 #include <asm/uaccess.h>
48 #include <asm/unistd.h>
50 #include <asm/mmu_context.h>
51 #include <asm/ppc-pci.h>
52 #include <asm/syscalls.h>
53 #include <asm/switch_to.h>
56 asmlinkage long ppc32_select(u32 n, compat_ulong_t __user *inp,
57 compat_ulong_t __user *outp, compat_ulong_t __user *exp,
61 return compat_sys_select((int)n, inp, outp, exp, compat_ptr(tvp_x));
65 long compat_sys_ipc(u32 call, u32 first, u32 second, u32 third, compat_uptr_t ptr,
70 version = call >> 16; /* hack for backward compatibility */
77 /* sign extend semid */
78 return compat_sys_semtimedop((int)first,
79 compat_ptr(ptr), second,
81 /* else fall through for normal semop() */
83 /* struct sembuf is the same on 32 and 64bit :)) */
84 /* sign extend semid */
85 return sys_semtimedop((int)first, compat_ptr(ptr), second,
88 /* sign extend key, nsems */
89 return sys_semget((int)first, (int)second, third);
91 /* sign extend semid, semnum */
92 return compat_sys_semctl((int)first, (int)second, third,
96 /* sign extend msqid */
97 return compat_sys_msgsnd((int)first, (int)second, third,
100 /* sign extend msqid, msgtyp */
101 return compat_sys_msgrcv((int)first, second, (int)fifth,
102 third, version, compat_ptr(ptr));
104 /* sign extend key */
105 return sys_msgget((int)first, second);
107 /* sign extend msqid */
108 return compat_sys_msgctl((int)first, second, compat_ptr(ptr));
111 /* sign extend shmid */
112 return compat_sys_shmat((int)first, second, third, version,
115 return sys_shmdt(compat_ptr(ptr));
117 /* sign extend key_t */
118 return sys_shmget((int)first, second, third);
120 /* sign extend shmid */
121 return compat_sys_shmctl((int)first, second, compat_ptr(ptr));
131 /* Note: it is necessary to treat out_fd and in_fd as unsigned ints,
132 * with the corresponding cast to a signed int to insure that the
133 * proper conversion (sign extension) between the register representation of a signed int (msr in 32-bit mode)
134 * and the register representation of a signed int (msr in 64-bit mode) is performed.
136 asmlinkage long compat_sys_sendfile_wrapper(u32 out_fd, u32 in_fd,
137 compat_off_t __user *offset, u32 count)
139 return compat_sys_sendfile((int)out_fd, (int)in_fd, offset, count);
142 asmlinkage long compat_sys_sendfile64_wrapper(u32 out_fd, u32 in_fd,
143 compat_loff_t __user *offset, u32 count)
145 return sys_sendfile((int)out_fd, (int)in_fd,
146 (off_t __user *)offset, count);
149 off_t ppc32_lseek(unsigned int fd, u32 offset, unsigned int origin)
152 return sys_lseek(fd, (int)offset, origin);
155 long compat_sys_truncate(const char __user * path, u32 length)
157 /* sign extend length */
158 return sys_truncate(path, (int)length);
161 long compat_sys_ftruncate(int fd, u32 length)
163 /* sign extend length */
164 return sys_ftruncate(fd, (int)length);
167 unsigned long compat_sys_mmap2(unsigned long addr, size_t len,
168 unsigned long prot, unsigned long flags,
169 unsigned long fd, unsigned long pgoff)
171 /* This should remain 12 even if PAGE_SIZE changes */
172 return sys_mmap(addr, len, prot, flags, fd, pgoff << 12);
177 * The 32 bit ABI passes long longs in an odd even register pair.
180 compat_ssize_t compat_sys_pread64(unsigned int fd, char __user *ubuf, compat_size_t count,
181 u32 reg6, u32 poshi, u32 poslo)
183 return sys_pread64(fd, ubuf, count, ((loff_t)poshi << 32) | poslo);
186 compat_ssize_t compat_sys_pwrite64(unsigned int fd, const char __user *ubuf, compat_size_t count,
187 u32 reg6, u32 poshi, u32 poslo)
189 return sys_pwrite64(fd, ubuf, count, ((loff_t)poshi << 32) | poslo);
192 compat_ssize_t compat_sys_readahead(int fd, u32 r4, u32 offhi, u32 offlo, u32 count)
194 return sys_readahead(fd, ((loff_t)offhi << 32) | offlo, count);
197 asmlinkage int compat_sys_truncate64(const char __user * path, u32 reg4,
198 unsigned long high, unsigned long low)
200 return sys_truncate(path, (high << 32) | low);
203 asmlinkage long compat_sys_fallocate(int fd, int mode, u32 offhi, u32 offlo,
204 u32 lenhi, u32 lenlo)
206 return sys_fallocate(fd, mode, ((loff_t)offhi << 32) | offlo,
207 ((loff_t)lenhi << 32) | lenlo);
210 asmlinkage int compat_sys_ftruncate64(unsigned int fd, u32 reg4, unsigned long high,
213 return sys_ftruncate(fd, (high << 32) | low);
216 long ppc32_lookup_dcookie(u32 cookie_high, u32 cookie_low, char __user *buf,
219 return sys_lookup_dcookie((u64)cookie_high << 32 | cookie_low,
223 long ppc32_fadvise64(int fd, u32 unused, u32 offset_high, u32 offset_low,
224 size_t len, int advice)
226 return sys_fadvise64(fd, (u64)offset_high << 32 | offset_low, len,
230 asmlinkage long compat_sys_add_key(const char __user *_type,
231 const char __user *_description,
232 const void __user *_payload,
236 return sys_add_key(_type, _description, _payload, plen, ringid);
239 asmlinkage long compat_sys_request_key(const char __user *_type,
240 const char __user *_description,
241 const char __user *_callout_info,
244 return sys_request_key(_type, _description, _callout_info, destringid);
247 asmlinkage long compat_sys_sync_file_range2(int fd, unsigned int flags,
248 unsigned offset_hi, unsigned offset_lo,
249 unsigned nbytes_hi, unsigned nbytes_lo)
251 loff_t offset = ((loff_t)offset_hi << 32) | offset_lo;
252 loff_t nbytes = ((loff_t)nbytes_hi << 32) | nbytes_lo;
254 return sys_sync_file_range(fd, offset, nbytes, flags);
257 asmlinkage long compat_sys_fanotify_mark(int fanotify_fd, unsigned int flags,
258 unsigned mask_hi, unsigned mask_lo,
259 int dfd, const char __user *pathname)
261 u64 mask = ((u64)mask_hi << 32) | mask_lo;
262 return sys_fanotify_mark(fanotify_fd, flags, mask, dfd, pathname);