arch/powerpc/kernel/sys_ppc32.c

   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 <linux/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 unsigned long compat_sys_mmap2(unsigned long addr, size_t len,
  56                           unsigned long prot, unsigned long flags,
  57                           unsigned long fd, unsigned long pgoff)
  58 {
  59         /* This should remain 12 even if PAGE_SIZE changes */
  60         return sys_mmap(addr, len, prot, flags, fd, pgoff << 12);
  61 }
  62
  63 /*
  64  * long long munging:
  65  * The 32 bit ABI passes long longs in an odd even register pair.
  66  */
  67
  68 compat_ssize_t compat_sys_pread64(unsigned int fd, char __user *ubuf, compat_size_t count,
  69                              u32 reg6, u32 poshi, u32 poslo)
  70 {
  71         return ksys_pread64(fd, ubuf, count, ((loff_t)poshi << 32) | poslo);
  72 }
  73
  74 compat_ssize_t compat_sys_pwrite64(unsigned int fd, const char __user *ubuf, compat_size_t count,
  75                               u32 reg6, u32 poshi, u32 poslo)
  76 {
  77         return ksys_pwrite64(fd, ubuf, count, ((loff_t)poshi << 32) | poslo);
  78 }
  79
  80 compat_ssize_t compat_sys_readahead(int fd, u32 r4, u32 offhi, u32 offlo, u32 count)
  81 {
  82         return ksys_readahead(fd, ((loff_t)offhi << 32) | offlo, count);
  83 }
  84
  85 asmlinkage int compat_sys_truncate64(const char __user * path, u32 reg4,
  86                                 unsigned long high, unsigned long low)
  87 {
  88         return ksys_truncate(path, (high << 32) | low);
  89 }
  90
  91 asmlinkage long compat_sys_fallocate(int fd, int mode, u32 offhi, u32 offlo,
  92                                      u32 lenhi, u32 lenlo)
  93 {
  94         return ksys_fallocate(fd, mode, ((loff_t)offhi << 32) | offlo,
  95                              ((loff_t)lenhi << 32) | lenlo);
  96 }
  97
  98 asmlinkage int compat_sys_ftruncate64(unsigned int fd, u32 reg4, unsigned long high,
  99                                  unsigned long low)
 100 {
 101         return ksys_ftruncate(fd, (high << 32) | low);
 102 }
 103
 104 long ppc32_fadvise64(int fd, u32 unused, u32 offset_high, u32 offset_low,
 105                      size_t len, int advice)
 106 {
 107         return ksys_fadvise64_64(fd, (u64)offset_high << 32 | offset_low, len,
 108                                  advice);
 109 }
 110
 111 asmlinkage long compat_sys_sync_file_range2(int fd, unsigned int flags,
 112                                    unsigned offset_hi, unsigned offset_lo,
 113                                    unsigned nbytes_hi, unsigned nbytes_lo)
 114 {
 115         loff_t offset = ((loff_t)offset_hi << 32) | offset_lo;
 116         loff_t nbytes = ((loff_t)nbytes_hi << 32) | nbytes_lo;
 117
 118         return ksys_sync_file_range(fd, offset, nbytes, flags);
 119 }