LXR linux/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
  29asmlinkage 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 */
  42asmlinkage 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 */
  52void * const sys_call_table[__NR_syscalls] __aligned(4096) = {
  53        [0 ... __NR_syscalls - 1] = sys_ni_syscall,
  54#include <asm/unistd.h>
  55};
  56