101 lines
2.3 KiB
C
101 lines
2.3 KiB
C
/*
|
|
* 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_flags(fd, 0);
|
|
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(¤t->mm->mmap_sem);
|
|
error = do_mmap_pgoff(file, addr, len, prot, flags, pgoff);
|
|
up_write(¤t->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;
|
|
}
|
|
|
|
asmlinkage long xtensa_fadvise64_64(int fd, int advice, unsigned long long offset, unsigned long long len)
|
|
{
|
|
return sys_fadvise64_64(fd, offset, len, advice);
|
|
}
|
|
|