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
  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
  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
  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
  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
  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
  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
 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
 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
 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
 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 }