LXR linux/arch/powerpc/kernel/sys

   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