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
  29#include <asm/cpufeature.h>
  30#include <asm/syscall.h>
  31
  32SYSCALL_DEFINE6(mmap, unsigned long, addr, unsigned long, len,
  33                unsigned long, prot, unsigned long, flags,
  34                unsigned long, fd, off_t, off)
  35{
  36        if (offset_in_page(off) != 0)
  37                return -EINVAL;
  38
  39        return ksys_mmap_pgoff(addr, len, prot, flags, fd, off >> PAGE_SHIFT);
  40}
  41
  42SYSCALL_DEFINE1(arm64_personality, unsigned int, personality)
  43{
  44        if (personality(personality) == PER_LINUX32 &&
  45                !system_supports_32bit_el0())
  46                return -EINVAL;
  47        return ksys_personality(personality);
  48}
  49
  50/*
  51 * Wrappers to pass the pt_regs argument.
  52 */
  53#define sys_personality         sys_arm64_personality
  54
  55asmlinkage long sys_ni_syscall(const struct pt_regs *);
  56#define __arm64_sys_ni_syscall  sys_ni_syscall
  57
  58#undef __SYSCALL
  59#define __SYSCALL(nr, sym)      asmlinkage long __arm64_##sym(const struct pt_regs *);
  60#include <asm/unistd.h>
  61
  62#undef __SYSCALL
  63#define __SYSCALL(nr, sym)      [nr] = (syscall_fn_t)__arm64_##sym,
  64
  65const syscall_fn_t sys_call_table[__NR_syscalls] = {
  66        [0 ... __NR_syscalls - 1] = (syscall_fn_t)sys_ni_syscall,
  67#include <asm/unistd.h>
  68};
  69