1 /* 2 * linux/arch/arm/kernel/sys_arm.c 3 * 4 * Copyright (C) People who wrote linux/arch/i386/kernel/sys_i386.c 5 * Copyright (C) 1995, 1996 Russell King. 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 file contains various random system calls that 12 * have a non-standard calling sequence on the Linux/arm 13 * platform. 14 */ 15 #include <linux/export.h> 16 #include <linux/errno.h> 17 #include <linux/sched.h> 18 #include <linux/mm.h> 19 #include <linux/sem.h> 20 #include <linux/msg.h> 21 #include <linux/shm.h> 22 #include <linux/stat.h> 23 #include <linux/syscalls.h> 24 #include <linux/mman.h> 25 #include <linux/fs.h> 26 #include <linux/file.h> 27 #include <linux/ipc.h> 28 #include <linux/uaccess.h> 29 #include <linux/slab.h> 30 31 /* Fork a new task - this creates a new program thread. 32 * This is called indirectly via a small wrapper 33 */ 34 asmlinkage int sys_fork(struct pt_regs *regs) 35 { 36 #ifdef CONFIG_MMU 37 return do_fork(SIGCHLD, regs->ARM_sp, regs, 0, NULL, NULL); 38 #else 39 /* can not support in nommu mode */ 40 return(-EINVAL); 41 #endif 42 } 43 44 /* Clone a task - this clones the calling program thread. 45 * This is called indirectly via a small wrapper 46 */ 47 asmlinkage int sys_clone(unsigned long clone_flags, unsigned long newsp, 48 int __user *parent_tidptr, int tls_val, 49 int __user *child_tidptr, struct pt_regs *regs) 50 { 51 if (!newsp) 52 newsp = regs->ARM_sp; 53 54 return do_fork(clone_flags, newsp, regs, 0, parent_tidptr, child_tidptr); 55 } 56 57 asmlinkage int sys_vfork(struct pt_regs *regs) 58 { 59 return do_fork(CLONE_VFORK | CLONE_VM | SIGCHLD, regs->ARM_sp, regs, 0, NULL, NULL); 60 } 61 62 /* 63 * Since loff_t is a 64 bit type we avoid a lot of ABI hassle 64 * with a different argument ordering. 65 */ 66 asmlinkage long sys_arm_fadvise64_64(int fd, int advice, 67 loff_t offset, loff_t len) 68 { 69 return sys_fadvise64_64(fd, offset, len, advice); 70 } 71