arch/csky/kernel/syscall.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 // Copyright (C) 2018 Hangzhou C-SKY Microsystems co.,ltd.
   3
   4 #include <linux/syscalls.h>
   5
   6 SYSCALL_DEFINE1(set_thread_area, unsigned long, addr)
   7 {
   8         struct thread_info *ti = task_thread_info(current);
   9         struct pt_regs *reg = current_pt_regs();
  10
  11         reg->tls = addr;
  12         ti->tp_value = addr;
  13
  14         return 0;
  15 }
  16
  17 SYSCALL_DEFINE6(mmap2,
  18         unsigned long, addr,
  19         unsigned long, len,
  20         unsigned long, prot,
  21         unsigned long, flags,
  22         unsigned long, fd,
  23         off_t, offset)
  24 {
  25         if (unlikely(offset & (~PAGE_MASK >> 12)))
  26                 return -EINVAL;
  27
  28         return ksys_mmap_pgoff(addr, len, prot, flags, fd,
  29                                offset >> (PAGE_SHIFT - 12));
  30 }
  31
  32 /*
  33  * for abiv1 the 64bits args should be even th, So we need mov the advice
  34  * forward.
  35  */
  36 SYSCALL_DEFINE4(csky_fadvise64_64,
  37         int, fd,
  38         int, advice,
  39         loff_t, offset,
  40         loff_t, len)
  41 {
  42         return ksys_fadvise64_64(fd, offset, len, advice);
  43 }