1/*
2 * sys_ppc32.c: Conversion between 32bit and 64bit native syscalls.
3 *
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)
7 *
8 * These routines maintain argument size conversion between 32bit and 64bit
9 * environment.
10 *
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.
15 */
16
17#include <linux/kernel.h>
18#include <linux/sched.h>
19#include <linux/fs.h>
20#include <linux/mm.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>
33#include <linux/in.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>
44
45#include <asm/ptrace.h>
46#include <asm/types.h>
47#include <asm/uaccess.h>
48#include <asm/unistd.h>
49#include <asm/time.h>
50#include <asm/mmu_context.h>
51#include <asm/ppc-pci.h>
52#include <asm/syscalls.h>
53#include <asm/switch_to.h>
54
55
56asmlinkage long ppc32_select(u32 n, compat_ulong_t __user *inp,
57		compat_ulong_t __user *outp, compat_ulong_t __user *exp,
58		compat_uptr_t tvp_x)
59{
60	/* sign extend n */
61	return compat_sys_select((int)n, inp, outp, exp, compat_ptr(tvp_x));
62}
63
64unsigned long compat_sys_mmap2(unsigned long addr, size_t len,
65			  unsigned long prot, unsigned long flags,
66			  unsigned long fd, unsigned long pgoff)
67{
68	/* This should remain 12 even if PAGE_SIZE changes */
69	return sys_mmap(addr, len, prot, flags, fd, pgoff << 12);
70}
71
72/*
73 * long long munging:
74 * The 32 bit ABI passes long longs in an odd even register pair.
75 */
76
77compat_ssize_t compat_sys_pread64(unsigned int fd, char __user *ubuf, compat_size_t count,
78			     u32 reg6, u32 poshi, u32 poslo)
79{
80	return sys_pread64(fd, ubuf, count, ((loff_t)poshi << 32) | poslo);
81}
82
83compat_ssize_t compat_sys_pwrite64(unsigned int fd, const char __user *ubuf, compat_size_t count,
84			      u32 reg6, u32 poshi, u32 poslo)
85{
86	return sys_pwrite64(fd, ubuf, count, ((loff_t)poshi << 32) | poslo);
87}
88
89compat_ssize_t compat_sys_readahead(int fd, u32 r4, u32 offhi, u32 offlo, u32 count)
90{
91	return sys_readahead(fd, ((loff_t)offhi << 32) | offlo, count);
92}
93
94asmlinkage int compat_sys_truncate64(const char __user * path, u32 reg4,
95				unsigned long high, unsigned long low)
96{
97	return sys_truncate(path, (high << 32) | low);
98}
99
100asmlinkage long compat_sys_fallocate(int fd, int mode, u32 offhi, u32 offlo,
101				     u32 lenhi, u32 lenlo)
102{
103	return sys_fallocate(fd, mode, ((loff_t)offhi << 32) | offlo,
104			     ((loff_t)lenhi << 32) | lenlo);
105}
106
107asmlinkage int compat_sys_ftruncate64(unsigned int fd, u32 reg4, unsigned long high,
108				 unsigned long low)
109{
110	return sys_ftruncate(fd, (high << 32) | low);
111}
112
113long ppc32_fadvise64(int fd, u32 unused, u32 offset_high, u32 offset_low,
114		     size_t len, int advice)
115{
116	return sys_fadvise64(fd, (u64)offset_high << 32 | offset_low, len,
117			     advice);
118}
119
120asmlinkage long compat_sys_sync_file_range2(int fd, unsigned int flags,
121				   unsigned offset_hi, unsigned offset_lo,
122				   unsigned nbytes_hi, unsigned nbytes_lo)
123{
124	loff_t offset = ((loff_t)offset_hi << 32) | offset_lo;
125	loff_t nbytes = ((loff_t)nbytes_hi << 32) | nbytes_lo;
126
127	return sys_sync_file_range(fd, offset, nbytes, flags);
128}
129