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*643d703dSSuzuki K Poulose #include <asm/cpufeature.h> 297992d60dSCatalin Marinas 307992d60dSCatalin Marinas asmlinkage long sys_mmap(unsigned long addr, unsigned long len, 317992d60dSCatalin Marinas unsigned long prot, unsigned long flags, 327992d60dSCatalin Marinas unsigned long fd, off_t off) 337992d60dSCatalin Marinas { 347992d60dSCatalin Marinas if (offset_in_page(off) != 0) 357992d60dSCatalin Marinas return -EINVAL; 367992d60dSCatalin Marinas 377992d60dSCatalin Marinas return sys_mmap_pgoff(addr, len, prot, flags, fd, off >> PAGE_SHIFT); 387992d60dSCatalin Marinas } 397992d60dSCatalin Marinas 40*643d703dSSuzuki K Poulose SYSCALL_DEFINE1(arm64_personality, unsigned int, personality) 41*643d703dSSuzuki K Poulose { 42*643d703dSSuzuki K Poulose if (personality(personality) == PER_LINUX32 && 43*643d703dSSuzuki K Poulose !system_supports_32bit_el0()) 44*643d703dSSuzuki K Poulose return -EINVAL; 45*643d703dSSuzuki K Poulose return sys_personality(personality); 46*643d703dSSuzuki K Poulose } 47*643d703dSSuzuki K Poulose 487992d60dSCatalin Marinas /* 497992d60dSCatalin Marinas * Wrappers to pass the pt_regs argument. 507992d60dSCatalin Marinas */ 5196486069SCatalin Marinas asmlinkage long sys_rt_sigreturn_wrapper(void); 527992d60dSCatalin Marinas #define sys_rt_sigreturn sys_rt_sigreturn_wrapper 53*643d703dSSuzuki K Poulose #define sys_personality sys_arm64_personality 547992d60dSCatalin Marinas 557992d60dSCatalin Marinas #undef __SYSCALL 567992d60dSCatalin Marinas #define __SYSCALL(nr, sym) [nr] = sym, 577992d60dSCatalin Marinas 587992d60dSCatalin Marinas /* 597992d60dSCatalin Marinas * The sys_call_table array must be 4K aligned to be accessible from 607992d60dSCatalin Marinas * kernel/entry.S. 617992d60dSCatalin Marinas */ 62c623b33bSMark Rutland void * const sys_call_table[__NR_syscalls] __aligned(4096) = { 637992d60dSCatalin Marinas [0 ... __NR_syscalls - 1] = sys_ni_syscall, 647992d60dSCatalin Marinas #include <asm/unistd.h> 657992d60dSCatalin Marinas }; 66