root/arch/powerpc/kernel/sys_ppc32.c

DEFINITIONS

1. compat_sys_mmap2
2. compat_sys_pread64
3. compat_sys_pwrite64
4. compat_sys_readahead
5. compat_sys_truncate64
6. compat_sys_fallocate
7. compat_sys_ftruncate64
8. ppc32_fadvise64
9. compat_sys_sync_file_range2

   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 
  51 unsigned 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 
  64 compat_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 
  70 compat_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 
  76 compat_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 
  81 asmlinkage 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 
  87 asmlinkage 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 
  94 asmlinkage 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 
 100 long 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 
 107 asmlinkage 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 }