LXR linux/arch/powerpc/kernel/sys

   1// SPDX-License-Identifier: GPL-2.0-or-later
   2/*
   3 * sys_ppc32.c: Conversion between 32bit and 64bit native syscalls.
   4 *
   5 * Copyright (C) 2001 IBM
   6 * Copyright (C) 1997,1998 Jakub Jelinek (jj@sunsite.mff.cuni.cz)
   7 * Copyright (C) 1997 David S. Miller (davem@caip.rutgers.edu)
   8 *
   9 * These routines maintain argument size conversion between 32bit and 64bit
  10 * environment.
  11 */
  12
  13#include <linux/kernel.h>
  14#include <linux/sched.h>
  15#include <linux/fs.h> 
  16#include <linux/mm.h> 
  17#include <linux/file.h> 
  18#include <linux/signal.h>
  19#include <linux/resource.h>
  20#include <linux/times.h>
  21#include <linux/smp.h>
  22#include <linux/sem.h>
  23#include <linux/msg.h>
  24#include <linux/shm.h>
  25#include <linux/poll.h>
  26#include <linux/personality.h>
  27#include <linux/stat.h>
  28#include <linux/mman.h>
  29#include <linux/in.h>
  30#include <linux/syscalls.h>
  31#include <linux/unistd.h>
  32#include <linux/sysctl.h>
  33#include <linux/binfmts.h>
  34#include <linux/security.h>
  35#include <linux/compat.h>
  36#include <linux/ptrace.h>
  37#include <linux/elf.h>
  38#include <linux/ipc.h>
  39#include <linux/slab.h>
  40
  41#include <asm/ptrace.h>
  42#include <asm/types.h>
  43#include <linux/uaccess.h>
  44#include <asm/unistd.h>
  45#include <asm/time.h>
  46#include <asm/mmu_context.h>
  47#include <asm/ppc-pci.h>
  48#include <asm/syscalls.h>
  49#include <asm/switch_to.h>
  50
  51unsigned long compat_sys_mmap2(unsigned long addr, size_t len,
  52                          unsigned long prot, unsigned long flags,
  53                          unsigned long fd, unsigned long pgoff)
  54{
  55        /* This should remain 12 even if PAGE_SIZE changes */
  56        return sys_mmap(addr, len, prot, flags, fd, pgoff << 12);
  57}
  58
  59/* 
  60 * long long munging:
  61 * The 32 bit ABI passes long longs in an odd even register pair.
  62 */
  63
  64compat_ssize_t compat_sys_pread64(unsigned int fd, char __user *ubuf, compat_size_t count,
  65                             u32 reg6, u32 poshi, u32 poslo)
  66{
  67        return ksys_pread64(fd, ubuf, count, ((loff_t)poshi << 32) | poslo);
  68}
  69
  70compat_ssize_t compat_sys_pwrite64(unsigned int fd, const char __user *ubuf, compat_size_t count,
  71                              u32 reg6, u32 poshi, u32 poslo)
  72{
  73        return ksys_pwrite64(fd, ubuf, count, ((loff_t)poshi << 32) | poslo);
  74}
  75
  76compat_ssize_t compat_sys_readahead(int fd, u32 r4, u32 offhi, u32 offlo, u32 count)
  77{
  78        return ksys_readahead(fd, ((loff_t)offhi << 32) | offlo, count);
  79}
  80
  81asmlinkage int compat_sys_truncate64(const char __user * path, u32 reg4,
  82                                unsigned long high, unsigned long low)
  83{
  84        return ksys_truncate(path, (high << 32) | low);
  85}
  86
  87asmlinkage long compat_sys_fallocate(int fd, int mode, u32 offhi, u32 offlo,
  88                                     u32 lenhi, u32 lenlo)
  89{
  90        return ksys_fallocate(fd, mode, ((loff_t)offhi << 32) | offlo,
  91                             ((loff_t)lenhi << 32) | lenlo);
  92}
  93
  94asmlinkage int compat_sys_ftruncate64(unsigned int fd, u32 reg4, unsigned long high,
  95                                 unsigned long low)
  96{
  97        return ksys_ftruncate(fd, (high << 32) | low);
  98}
  99
 100long ppc32_fadvise64(int fd, u32 unused, u32 offset_high, u32 offset_low,
 101                     size_t len, int advice)
 102{
 103        return ksys_fadvise64_64(fd, (u64)offset_high << 32 | offset_low, len,
 104                                 advice);
 105}
 106
 107asmlinkage long compat_sys_sync_file_range2(int fd, unsigned int flags,
 108                                   unsigned offset_hi, unsigned offset_lo,
 109                                   unsigned nbytes_hi, unsigned nbytes_lo)
 110{
 111        loff_t offset = ((loff_t)offset_hi << 32) | offset_lo;
 112        loff_t nbytes = ((loff_t)nbytes_hi << 32) | nbytes_lo;
 113
 114        return ksys_sync_file_range(fd, offset, nbytes, flags);
 115}
 116