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7992d60d CM |
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> | |
643d703d | 28 | #include <asm/cpufeature.h> |
7992d60d | 29 | |
7992d60d CM |
30 | asmlinkage 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 sys_mmap_pgoff(addr, len, prot, flags, fd, off >> PAGE_SHIFT); | |
38 | } | |
39 | ||
643d703d SP |
40 | SYSCALL_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 | ||
7992d60d CM |
48 | /* |
49 | * Wrappers to pass the pt_regs argument. | |
50 | */ | |
96486069 | 51 | asmlinkage long sys_rt_sigreturn_wrapper(void); |
7992d60d | 52 | #define sys_rt_sigreturn sys_rt_sigreturn_wrapper |
643d703d | 53 | #define sys_personality sys_arm64_personality |
7992d60d | 54 | |
7992d60d CM |
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 | */ | |
c623b33b | 62 | void * const sys_call_table[__NR_syscalls] __aligned(4096) = { |
7992d60d CM |
63 | [0 ... __NR_syscalls - 1] = sys_ni_syscall, |
64 | #include <asm/unistd.h> | |
65 | }; |