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 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 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 48 /* 49 * Wrappers to pass the pt_regs argument. 50 */ 51 asmlinkage 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 */ 62 void * const sys_call_table[__NR_syscalls] __aligned(4096) = { 63 [0 ... __NR_syscalls - 1] = sys_ni_syscall, 64 #include <asm/unistd.h> 65 }; 66