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};