arch/arm64/kernel/sys.c

   1 /*
   2  * AArch64-specific system calls implementation
   3  *
   4  * Copyright (C) 2012 ARM Ltd.
   5  * Author: Catalin Marinas <catalin.marinas@arm.com>
   6  *
   7  * This program is free software; you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License version 2 as
   9  * published by the Free Software Foundation.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  18  */
  19
  20 #include <linux/compiler.h>
  21 #include <linux/errno.h>
  22 #include <linux/fs.h>
  23 #include <linux/mm.h>
  24 #include <linux/export.h>
  25 #include <linux/sched.h>
  26 #include <linux/slab.h>
  27 #include <linux/syscalls.h>
  28
  29 asmlinkage long sys_mmap(unsigned long addr, unsigned long len,
  30                          unsigned long prot, unsigned long flags,
  31                          unsigned long fd, off_t off)
  32 {
  33         if (offset_in_page(off) != 0)
  34                 return -EINVAL;
  35
  36         return sys_mmap_pgoff(addr, len, prot, flags, fd, off >> PAGE_SHIFT);
  37 }
  38
  39 /*
  40  * Wrappers to pass the pt_regs argument.
  41  */
  42 asmlinkage long sys_rt_sigreturn_wrapper(void);
  43 #define sys_rt_sigreturn        sys_rt_sigreturn_wrapper
  44
  45 #undef __SYSCALL
  46 #define __SYSCALL(nr, sym)      [nr] = sym,
  47
  48 /*
  49  * The sys_call_table array must be 4K aligned to be accessible from
  50  * kernel/entry.S.
  51  */
  52 void * const sys_call_table[__NR_syscalls] __aligned(4096) = {
  53         [0 ... __NR_syscalls - 1] = sys_ni_syscall,
  54 #include <asm/unistd.h>
  55 };