17992d60dSCatalin Marinas /* 27992d60dSCatalin Marinas * AArch64-specific system calls implementation 37992d60dSCatalin Marinas * 47992d60dSCatalin Marinas * Copyright (C) 2012 ARM Ltd. 57992d60dSCatalin Marinas * Author: Catalin Marinas <[email protected]> 67992d60dSCatalin Marinas * 77992d60dSCatalin Marinas * This program is free software; you can redistribute it and/or modify 87992d60dSCatalin Marinas * it under the terms of the GNU General Public License version 2 as 97992d60dSCatalin Marinas * published by the Free Software Foundation. 107992d60dSCatalin Marinas * 117992d60dSCatalin Marinas * This program is distributed in the hope that it will be useful, 127992d60dSCatalin Marinas * but WITHOUT ANY WARRANTY; without even the implied warranty of 137992d60dSCatalin Marinas * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 147992d60dSCatalin Marinas * GNU General Public License for more details. 157992d60dSCatalin Marinas * 167992d60dSCatalin Marinas * You should have received a copy of the GNU General Public License 177992d60dSCatalin Marinas * along with this program. If not, see <http://www.gnu.org/licenses/>. 187992d60dSCatalin Marinas */ 197992d60dSCatalin Marinas 207992d60dSCatalin Marinas #include <linux/compiler.h> 217992d60dSCatalin Marinas #include <linux/errno.h> 227992d60dSCatalin Marinas #include <linux/fs.h> 237992d60dSCatalin Marinas #include <linux/mm.h> 247992d60dSCatalin Marinas #include <linux/export.h> 257992d60dSCatalin Marinas #include <linux/sched.h> 267992d60dSCatalin Marinas #include <linux/slab.h> 277992d60dSCatalin Marinas #include <linux/syscalls.h> 28*27d83e68SMark Rutland 29643d703dSSuzuki K Poulose #include <asm/cpufeature.h> 30*27d83e68SMark Rutland #include <asm/syscall.h> 317992d60dSCatalin Marinas 327992d60dSCatalin Marinas asmlinkage long sys_mmap(unsigned long addr, unsigned long len, 337992d60dSCatalin Marinas unsigned long prot, unsigned long flags, 347992d60dSCatalin Marinas unsigned long fd, off_t off) 357992d60dSCatalin Marinas { 367992d60dSCatalin Marinas if (offset_in_page(off) != 0) 377992d60dSCatalin Marinas return -EINVAL; 387992d60dSCatalin Marinas 39a90f590aSDominik Brodowski return ksys_mmap_pgoff(addr, len, prot, flags, fd, off >> PAGE_SHIFT); 407992d60dSCatalin Marinas } 417992d60dSCatalin Marinas 42643d703dSSuzuki K Poulose SYSCALL_DEFINE1(arm64_personality, unsigned int, personality) 43643d703dSSuzuki K Poulose { 44643d703dSSuzuki K Poulose if (personality(personality) == PER_LINUX32 && 45643d703dSSuzuki K Poulose !system_supports_32bit_el0()) 46643d703dSSuzuki K Poulose return -EINVAL; 47643d703dSSuzuki K Poulose return sys_personality(personality); 48643d703dSSuzuki K Poulose } 49643d703dSSuzuki K Poulose 507992d60dSCatalin Marinas /* 517992d60dSCatalin Marinas * Wrappers to pass the pt_regs argument. 527992d60dSCatalin Marinas */ 533085e164SMark Rutland asmlinkage long sys_rt_sigreturn(void); 54643d703dSSuzuki K Poulose #define sys_personality sys_arm64_personality 557992d60dSCatalin Marinas 567992d60dSCatalin Marinas #undef __SYSCALL 57*27d83e68SMark Rutland #define __SYSCALL(nr, sym) [nr] = (syscall_fn_t)sym, 587992d60dSCatalin Marinas 597992d60dSCatalin Marinas /* 607992d60dSCatalin Marinas * The sys_call_table array must be 4K aligned to be accessible from 617992d60dSCatalin Marinas * kernel/entry.S. 627992d60dSCatalin Marinas */ 63*27d83e68SMark Rutland const syscall_fn_t sys_call_table[__NR_syscalls] __aligned(4096) = { 64*27d83e68SMark Rutland [0 ... __NR_syscalls - 1] = (syscall_fn_t)sys_ni_syscall, 657992d60dSCatalin Marinas #include <asm/unistd.h> 667992d60dSCatalin Marinas }; 67