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
ppc32_select(u32 n,compat_ulong_t __user * inp,compat_ulong_t __user * outp,compat_ulong_t __user * exp,compat_uptr_t tvp_x)56 asmlinkage 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
compat_sys_mmap2(unsigned long addr,size_t len,unsigned long prot,unsigned long flags,unsigned long fd,unsigned long pgoff)64 unsigned 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
compat_sys_pread64(unsigned int fd,char __user * ubuf,compat_size_t count,u32 reg6,u32 poshi,u32 poslo)77 compat_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
compat_sys_pwrite64(unsigned int fd,const char __user * ubuf,compat_size_t count,u32 reg6,u32 poshi,u32 poslo)83 compat_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
compat_sys_readahead(int fd,u32 r4,u32 offhi,u32 offlo,u32 count)89 compat_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
compat_sys_truncate64(const char __user * path,u32 reg4,unsigned long high,unsigned long low)94 asmlinkage 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
compat_sys_fallocate(int fd,int mode,u32 offhi,u32 offlo,u32 lenhi,u32 lenlo)100 asmlinkage 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
compat_sys_ftruncate64(unsigned int fd,u32 reg4,unsigned long high,unsigned long low)107 asmlinkage 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
ppc32_fadvise64(int fd,u32 unused,u32 offset_high,u32 offset_low,size_t len,int advice)113 long 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
compat_sys_sync_file_range2(int fd,unsigned int flags,unsigned offset_hi,unsigned offset_lo,unsigned nbytes_hi,unsigned nbytes_lo)120 asmlinkage 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