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 #include <asm/syscalls.h>
  17
  18 asmlinkage long sys_mmap2(unsigned long addr, unsigned long len,
  19                           unsigned long prot, unsigned long flags,
  20                           unsigned long fd, off_t offset)
  21 {
  22         int error = -EBADF;
  23         struct file *file = NULL;
  24
  25         flags &= ~(MAP_EXECUTABLE | MAP_DENYWRITE);
  26         if (!(flags & MAP_ANONYMOUS)) {
  27                 file = fget(fd);
  28                 if (!file)
  29                         return error;
  30         }
  31
  32         down_write(&current->mm->mmap_sem);
  33         error = do_mmap_pgoff(file, addr, len, prot, flags, offset);
  34         up_write(&current->mm->mmap_sem);
  35
  36         if (file)
  37                 fput(file);
  38         return error;
  39 }
  40
  41 int kernel_execve(const char *file, char **argv, char **envp)
  42 {
  43         register long scno asm("r8") = __NR_execve;
  44         register long sc1 asm("r12") = (long)file;
  45         register long sc2 asm("r11") = (long)argv;
  46         register long sc3 asm("r10") = (long)envp;
  47
  48         asm volatile("scall"
  49                      : "=r"(sc1)
  50                      : "r"(scno), "0"(sc1), "r"(sc2), "r"(sc3)
  51                      : "cc", "memory");
  52         return sc1;
  53 }