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 /* 30 * Clone a task - this clones the calling program thread. 31 */ 32 asmlinkage long sys_clone(unsigned long clone_flags, unsigned long newsp, 33 int __user *parent_tidptr, unsigned long tls_val, 34 int __user *child_tidptr) 35 { 36 return do_fork(clone_flags, newsp, current_pt_regs(), 0, 37 parent_tidptr, child_tidptr); 38 } 39 40 asmlinkage long sys_mmap(unsigned long addr, unsigned long len, 41 unsigned long prot, unsigned long flags, 42 unsigned long fd, off_t off) 43 { 44 if (offset_in_page(off) != 0) 45 return -EINVAL; 46 47 return sys_mmap_pgoff(addr, len, prot, flags, fd, off >> PAGE_SHIFT); 48 } 49 50 /* 51 * Wrappers to pass the pt_regs argument. 52 */ 53 #define sys_rt_sigreturn sys_rt_sigreturn_wrapper 54 #define sys_sigaltstack sys_sigaltstack_wrapper 55 56 #include <asm/syscalls.h> 57 58 #undef __SYSCALL 59 #define __SYSCALL(nr, sym) [nr] = sym, 60 61 /* 62 * The sys_call_table array must be 4K aligned to be accessible from 63 * kernel/entry.S. 64 */ 65 void *sys_call_table[__NR_syscalls] __aligned(4096) = { 66 [0 ... __NR_syscalls - 1] = sys_ni_syscall, 67 #include <asm/unistd.h> 68 }; 69