root/arch/sh/kernel/sys_sh32.c

DEFINITIONS

1. sys_sh_pipe
2. sys_pread_wrapper
3. sys_pwrite_wrapper
4. sys_fadvise64_64_wrapper

   1 // SPDX-License-Identifier: GPL-2.0
   2 #include <linux/errno.h>
   3 #include <linux/sched.h>
   4 #include <linux/sched/task_stack.h>
   5 #include <linux/mm.h>
   6 #include <linux/smp.h>
   7 #include <linux/sem.h>
   8 #include <linux/msg.h>
   9 #include <linux/shm.h>
  10 #include <linux/stat.h>
  11 #include <linux/syscalls.h>
  12 #include <linux/mman.h>
  13 #include <linux/file.h>
  14 #include <linux/module.h>
  15 #include <linux/fs.h>
  16 #include <linux/ipc.h>
  17 #include <asm/cacheflush.h>
  18 #include <linux/uaccess.h>
  19 #include <asm/unistd.h>
  20 #include <asm/syscalls.h>
  21 
  22 /*
  23  * sys_pipe() is the normal C calling standard for creating
  24  * a pipe. It's not the way Unix traditionally does this, though.
  25  */
  26 asmlinkage int sys_sh_pipe(void)
  27 {
  28         int fd[2];
  29         int error;
  30 
  31         error = do_pipe_flags(fd, 0);
  32         if (!error) {
  33                 current_pt_regs()->regs[1] = fd[1];
  34                 return fd[0];
  35         }
  36         return error;
  37 }
  38 
  39 asmlinkage ssize_t sys_pread_wrapper(unsigned int fd, char __user *buf,
  40                              size_t count, long dummy, loff_t pos)
  41 {
  42         return ksys_pread64(fd, buf, count, pos);
  43 }
  44 
  45 asmlinkage ssize_t sys_pwrite_wrapper(unsigned int fd, const char __user *buf,
  46                               size_t count, long dummy, loff_t pos)
  47 {
  48         return ksys_pwrite64(fd, buf, count, pos);
  49 }
  50 
  51 asmlinkage int sys_fadvise64_64_wrapper(int fd, u32 offset0, u32 offset1,
  52                                 u32 len0, u32 len1, int advice)
  53 {
  54 #ifdef  __LITTLE_ENDIAN__
  55         return ksys_fadvise64_64(fd, (u64)offset1 << 32 | offset0,
  56                                  (u64)len1 << 32 | len0, advice);
  57 #else
  58         return ksys_fadvise64_64(fd, (u64)offset0 << 32 | offset1,
  59                                  (u64)len0 << 32 | len1, advice);
  60 #endif
  61 }