arch/avr32/kernel/sys_avr32.c

   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
  17 asmlinkage 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
  40 int 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 }