LXR linux/arch/arm64/kernel/sys.c

   1// SPDX-License-Identifier: GPL-2.0-only
   2/*
   3 * AArch64-specific system calls implementation
   4 *
   5 * Copyright (C) 2012 ARM Ltd.
   6 * Author: Catalin Marinas <catalin.marinas@arm.com>
   7 */
   8
   9#include <linux/compiler.h>
  10#include <linux/errno.h>
  11#include <linux/fs.h>
  12#include <linux/mm.h>
  13#include <linux/export.h>
  14#include <linux/sched.h>
  15#include <linux/slab.h>
  16#include <linux/syscalls.h>
  17
  18#include <asm/cpufeature.h>
  19#include <asm/syscall.h>
  20
  21SYSCALL_DEFINE6(mmap, unsigned long, addr, unsigned long, len,
  22                unsigned long, prot, unsigned long, flags,
  23                unsigned long, fd, unsigned long, off)
  24{
  25        if (offset_in_page(off) != 0)
  26                return -EINVAL;
  27
  28        return ksys_mmap_pgoff(addr, len, prot, flags, fd, off >> PAGE_SHIFT);
  29}
  30
  31SYSCALL_DEFINE1(arm64_personality, unsigned int, personality)
  32{
  33        if (personality(personality) == PER_LINUX32 &&
  34                !system_supports_32bit_el0())
  35                return -EINVAL;
  36        return ksys_personality(personality);
  37}
  38
  39asmlinkage long sys_ni_syscall(void);
  40
  41asmlinkage long __arm64_sys_ni_syscall(const struct pt_regs *__unused)
  42{
  43        return sys_ni_syscall();
  44}
  45
  46/*
  47 * Wrappers to pass the pt_regs argument.
  48 */
  49#define __arm64_sys_personality         __arm64_sys_arm64_personality
  50
  51#undef __SYSCALL
  52#define __SYSCALL(nr, sym)      asmlinkage long __arm64_##sym(const struct pt_regs *);
  53#include <asm/unistd.h>
  54
  55#undef __SYSCALL
  56#define __SYSCALL(nr, sym)      [nr] = __arm64_##sym,
  57
  58const syscall_fn_t sys_call_table[__NR_syscalls] = {
  59        [0 ... __NR_syscalls - 1] = __arm64_sys_ni_syscall,
  60#include <asm/unistd.h>
  61};
  62