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
sys_mmap2(unsigned long addr,unsigned long len,unsigned long prot,unsigned long flags,unsigned long fd,off_t offset)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(¤t->mm->mmap_sem);
33 error = do_mmap_pgoff(file, addr, len, prot, flags, offset);
34 up_write(¤t->mm->mmap_sem);
35
36 if (file)
37 fput(file);
38 return error;
39 }
40
kernel_execve(const char * file,char ** argv,char ** envp)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 }
54