/* * arch/xtensa/kernel/syscall.c * * This file is subject to the terms and conditions of the GNU General Public * License.  See the file "COPYING" in the main directory of this archive * for more details. * * Copyright (C) 2001 - 2005 Tensilica Inc. * Copyright (C) 2000 Silicon Graphics, Inc. * Copyright (C) 1995 - 2000 by Ralf Baechle * * Joe Taylor <joe@tensilica.com, joetylr@yahoo.com> * Marc Gauthier <marc@tensilica.com, marc@alumni.uwaterloo.ca> * Chris Zankel <chris@zankel.net> * Kevin Chea * */#include <asm/uaccess.h>#include <asm/syscall.h>#include <asm/unistd.h>#include <linux/linkage.h>#include <linux/stringify.h>#include <linux/errno.h>#include <linux/syscalls.h>#include <linux/file.h>#include <linux/fs.h>#include <linux/mman.h>#include <linux/shm.h> typedef void (*syscall_t)(void); syscall_t sys_call_table[__NR_syscall_count] /* FIXME __cacheline_aligned */= {	[0 ... __NR_syscall_count - 1] = (syscall_t)&sys_ni_syscall, #undef __SYSCALL#define __SYSCALL(nr,symbol,nargs) [ nr ] = (syscall_t)symbol,#undef _XTENSA_UNISTD_H#undef  __KERNEL_SYSCALLS__#include <asm/unistd.h>}; /* * xtensa_pipe() is the normal C calling standard for creating a pipe. It's not * the way unix traditional does this, though. */ asmlinkage long xtensa_pipe(int __user *userfds){	int fd[2];	int error; 	error = do_pipe(fd);	if (!error) {		if (copy_to_user(userfds, fd, 2 * sizeof(int)))			error = -EFAULT;	}	return error;}  asmlinkage long xtensa_mmap2(unsigned long addr, unsigned long len,   			     unsigned long prot, unsigned long flags,			     unsigned long fd, unsigned long pgoff){	int error = -EBADF;	struct file * file = NULL; 	flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE);	if (!(flags & MAP_ANONYMOUS)) {		file = fget(fd);		if (!file)			goto out;	} 	down_write(&current->mm->mmap_sem);	error = do_mmap_pgoff(file, addr, len, prot, flags, pgoff);	up_write(&current->mm->mmap_sem); 	if (file)		fput(file);out:	return error;} asmlinkage long xtensa_shmat(int shmid, char __user *shmaddr, int shmflg){	unsigned long ret;	long err; 	err = do_shmat(shmid, shmaddr, shmflg, &ret);	if (err)		return err;	return (long)ret;}