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
29 #include <asm/cpufeature.h>
30 #include <asm/syscall.h>
31
SYSCALL_DEFINE6(mmap,unsigned long,addr,unsigned long,len,unsigned long,prot,unsigned long,flags,unsigned long,fd,off_t,off)32 SYSCALL_DEFINE6(mmap, unsigned long, addr, unsigned long, len,
33 unsigned long, prot, unsigned long, flags,
34 unsigned long, fd, off_t, off)
35 {
36 if (offset_in_page(off) != 0)
37 return -EINVAL;
38
39 return ksys_mmap_pgoff(addr, len, prot, flags, fd, off >> PAGE_SHIFT);
40 }
41
SYSCALL_DEFINE1(arm64_personality,unsigned int,personality)42 SYSCALL_DEFINE1(arm64_personality, unsigned int, personality)
43 {
44 if (personality(personality) == PER_LINUX32 &&
45 !system_supports_32bit_el0())
46 return -EINVAL;
47 return ksys_personality(personality);
48 }
49
50 /*
51 * Wrappers to pass the pt_regs argument.
52 */
53 #define sys_personality sys_arm64_personality
54
55 asmlinkage long sys_ni_syscall(const struct pt_regs *);
56 #define __arm64_sys_ni_syscall sys_ni_syscall
57
58 #undef __SYSCALL
59 #define __SYSCALL(nr, sym) asmlinkage long __arm64_##sym(const struct pt_regs *);
60 #include <asm/unistd.h>
61
62 #undef __SYSCALL
63 #define __SYSCALL(nr, sym) [nr] = (syscall_fn_t)__arm64_##sym,
64
65 const syscall_fn_t sys_call_table[__NR_syscalls] = {
66 [0 ... __NR_syscalls - 1] = (syscall_fn_t)sys_ni_syscall,
67 #include <asm/unistd.h>
68 };
69
