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#include <asm/cpufeature.h>
 
29
30asmlinkage long sys_mmap(unsigned long addr, unsigned long len,
31			 unsigned long prot, unsigned long flags,
32			 unsigned long fd, off_t off)
33{
34	if (offset_in_page(off) != 0)
35		return -EINVAL;
36
37	return ksys_mmap_pgoff(addr, len, prot, flags, fd, off >> PAGE_SHIFT);
38}
39
40SYSCALL_DEFINE1(arm64_personality, unsigned int, personality)
41{
42	if (personality(personality) == PER_LINUX32 &&
43		!system_supports_32bit_el0())
44		return -EINVAL;
45	return sys_personality(personality);
 
 
 
 
 
 
 
46}
47
48/*
49 * Wrappers to pass the pt_regs argument.
50 */
51asmlinkage long sys_rt_sigreturn_wrapper(void);
52#define sys_rt_sigreturn	sys_rt_sigreturn_wrapper
53#define sys_personality		sys_arm64_personality
54
55#undef __SYSCALL
56#define __SYSCALL(nr, sym)	[nr] = sym,
 
57
58/*
59 * The sys_call_table array must be 4K aligned to be accessible from
60 * kernel/entry.S.
61 */
62void * const sys_call_table[__NR_syscalls] __aligned(4096) = {
63	[0 ... __NR_syscalls - 1] = sys_ni_syscall,
64#include <asm/unistd.h>
65};

 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};