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#include <asm/syscalls.h>
  17
  18asmlinkage 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
  41int 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}
  54