LXR linux/arch/avr32/kernel/sys

   1/*
   2 * Copyright (C) 2004-2006 Atmel Corporation
   3 *
   4 * This program is free software; you can redistribute it and/or modify
   5 * it under the terms of the GNU General Public License version 2 as
   6 * published by the Free Software Foundation.
   7 */
   8#include <linux/errno.h>
   9#include <linux/fs.h>
  10#include <linux/file.h>
  11#include <linux/mm.h>
  12#include <linux/unistd.h>
  13
  14#include <asm/mman.h>
  15#include <asm/uaccess.h>
  16
  17asmlinkage long sys_mmap2(unsigned long addr, unsigned long len,
  18                          unsigned long prot, unsigned long flags,
  19                          unsigned long fd, off_t offset)
  20{
  21        int error = -EBADF;
  22        struct file *file = NULL;
  23
  24        flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE);
  25        if (!(flags & MAP_ANONYMOUS)) {
  26                file = fget(fd);
  27                if (!file)
  28                        return error;
  29        }
  30
  31        down_write(&current->mm->mmap_sem);
  32        error = do_mmap_pgoff(file, addr, len, prot, flags, offset);
  33        up_write(&current->mm->mmap_sem);
  34
  35        if (file)
  36                fput(file);
  37        return error;
  38}
  39
  40int kernel_execve(const char *file, char **argv, char **envp)
  41{
  42        register long scno asm("r8") = __NR_execve;
  43        register long sc1 asm("r12") = (long)file;
  44        register long sc2 asm("r11") = (long)argv;
  45        register long sc3 asm("r10") = (long)envp;
  46
  47        asm volatile("scall"
  48                     : "=r"(sc1)
  49                     : "r"(scno), "0"(sc1), "r"(sc2), "r"(sc3)
  50                     : "cc", "memory");
  51        return sc1;
  52}
  53