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 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 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