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
21 SYSCALL_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
31 SYSCALL_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
39 asmlinkage long sys_ni_syscall(void);
40
41 asmlinkage 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 #define __SYSCALL_WITH_COMPAT(nr, native, compat) __SYSCALL(nr, native)
52
53 #undef __SYSCALL
54 #define __SYSCALL(nr, sym) asmlinkage long __arm64_##sym(const struct pt_regs *);
55 #include <asm/syscall_table_64.h>
56
57 #undef __SYSCALL
58 #define __SYSCALL(nr, sym) [nr] = __arm64_##sym,
59
60 const syscall_fn_t sys_call_table[__NR_syscalls] = {
61 [0 ... __NR_syscalls - 1] = __arm64_sys_ni_syscall,
62 #include <asm/syscall_table_64.h>
63 };
64
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