1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * AArch64-specific system calls implementation 4 * 5 * Copyright (C) 2012 ARM Ltd. 6 * Author: Catalin Marinas <catalin.marinas@arm.com> 7 */ 8 9 #include <linux/compiler.h> 10 #include <linux/errno.h> 11 #include <linux/fs.h> 12 #include <linux/mm.h> 13 #include <linux/export.h> 14 #include <linux/sched.h> 15 #include <linux/slab.h> 16 #include <linux/syscalls.h> 17 18 #include <asm/cpufeature.h> 19 #include <asm/syscall.h> 20 21 SYSCALL_DEFINE6(mmap, unsigned long, addr, unsigned long, len, 22 unsigned long, prot, unsigned long, flags, 23 unsigned long, fd, unsigned long, off) 24 { 25 if (offset_in_page(off) != 0) 26 return -EINVAL; 27 28 return ksys_mmap_pgoff(addr, len, prot, flags, fd, off >> PAGE_SHIFT); 29 } 30 31 SYSCALL_DEFINE1(arm64_personality, unsigned int, personality) 32 { 33 if (personality(personality) == PER_LINUX32 && 34 !system_supports_32bit_el0()) 35 return -EINVAL; 36 return ksys_personality(personality); 37 } 38 39 asmlinkage long sys_ni_syscall(void); 40 41 asmlinkage long __arm64_sys_ni_syscall(const struct pt_regs *__unused) 42 { 43 return sys_ni_syscall(); 44 } 45 46 /* 47 * Wrappers to pass the pt_regs argument. 48 */ 49 #define __arm64_sys_personality __arm64_sys_arm64_personality 50 51 #undef __SYSCALL 52 #define __SYSCALL(nr, sym) asmlinkage long __arm64_##sym(const struct pt_regs *); 53 #include <asm/unistd.h> 54 55 #undef __SYSCALL 56 #define __SYSCALL(nr, sym) [nr] = __arm64_##sym, 57 58 const syscall_fn_t sys_call_table[__NR_syscalls] = { 59 [0 ... __NR_syscalls - 1] = __arm64_sys_ni_syscall, 60 #include <asm/unistd.h> 61 }; 62