コード例 #1
0
ファイル: binfmt_aout32.c プロジェクト: mobilipia/iods
/* N.B. Move to .h file and use code in fs/binfmt_aout.c? */
static int load_aout32_library(struct file *file)
{
	struct inode * inode;
	unsigned long bss, start_addr, len;
	unsigned long error;
	int retval;
	struct exec ex;

	inode = file->f_path.dentry->d_inode;

	retval = -ENOEXEC;
	error = kernel_read(file, 0, (char *) &ex, sizeof(ex));
	if (error != sizeof(ex))
		goto out;

	/* We come in here for the regular a.out style of shared libraries */
	if ((N_MAGIC(ex) != ZMAGIC && N_MAGIC(ex) != QMAGIC) || N_TRSIZE(ex) ||
	    N_DRSIZE(ex) || ((ex.a_entry & 0xfff) && N_MAGIC(ex) == ZMAGIC) ||
	    inode->i_size < ex.a_text+ex.a_data+N_SYMSIZE(ex)+N_TXTOFF(ex)) {
		goto out;
	}

	if (N_MAGIC(ex) == ZMAGIC && N_TXTOFF(ex) &&
	    (N_TXTOFF(ex) < inode->i_sb->s_blocksize)) {
		printk("N_TXTOFF < BLOCK_SIZE. Please convert library\n");
		goto out;
	}

	if (N_FLAGS(ex))
		goto out;

	/* For  QMAGIC, the starting address is 0x20 into the page.  We mask
	   this off to get the starting address for the page */

	start_addr =  ex.a_entry & 0xfffff000;

	/* Now use mmap to map the library into memory. */
	down_write(&current->mm->mmap_sem);
	error = do_mmap(file, start_addr, ex.a_text + ex.a_data,
			PROT_READ | PROT_WRITE | PROT_EXEC,
			MAP_FIXED | MAP_PRIVATE | MAP_DENYWRITE,
			N_TXTOFF(ex));
	up_write(&current->mm->mmap_sem);
	retval = error;
	if (error != start_addr)
		goto out;

	len = PAGE_ALIGN(ex.a_text + ex.a_data);
	bss = ex.a_text + ex.a_data + ex.a_bss;
	if (bss > len) {
		down_write(&current->mm->mmap_sem);
		error = do_brk(start_addr + len, bss - len);
		up_write(&current->mm->mmap_sem);
		retval = error;
		if (error != start_addr + len)
			goto out;
	}
	retval = 0;
out:
	return retval;
}
コード例 #2
0
ファイル: binfmt_aout32.c プロジェクト: mobilipia/iods
static int load_aout32_binary(struct linux_binprm * bprm, struct pt_regs * regs)
{
	struct exec ex;
	unsigned long error;
	unsigned long fd_offset;
	unsigned long rlim;
	unsigned long orig_thr_flags;
	int retval;

	ex = *((struct exec *) bprm->buf);		/* exec-header */
	if ((N_MAGIC(ex) != ZMAGIC && N_MAGIC(ex) != OMAGIC &&
	     N_MAGIC(ex) != QMAGIC && N_MAGIC(ex) != NMAGIC) ||
	    N_TRSIZE(ex) || N_DRSIZE(ex) ||
	    bprm->file->f_path.dentry->d_inode->i_size < ex.a_text+ex.a_data+N_SYMSIZE(ex)+N_TXTOFF(ex)) {
		return -ENOEXEC;
	}

	fd_offset = N_TXTOFF(ex);

	/* Check initial limits. This avoids letting people circumvent
	 * size limits imposed on them by creating programs with large
	 * arrays in the data or bss.
	 */
	rlim = current->signal->rlim[RLIMIT_DATA].rlim_cur;
	if (rlim >= RLIM_INFINITY)
		rlim = ~0;
	if (ex.a_data + ex.a_bss > rlim)
		return -ENOMEM;

	/* Flush all traces of the currently running executable */
	retval = flush_old_exec(bprm);
	if (retval)
		return retval;

	/* OK, This is the point of no return */
	set_personality(PER_SUNOS);

	current->mm->end_code = ex.a_text +
		(current->mm->start_code = N_TXTADDR(ex));
	current->mm->end_data = ex.a_data +
		(current->mm->start_data = N_DATADDR(ex));
	current->mm->brk = ex.a_bss +
		(current->mm->start_brk = N_BSSADDR(ex));
	current->mm->free_area_cache = current->mm->mmap_base;
	current->mm->cached_hole_size = 0;

	current->mm->mmap = NULL;
	compute_creds(bprm);
 	current->flags &= ~PF_FORKNOEXEC;
	if (N_MAGIC(ex) == NMAGIC) {
		loff_t pos = fd_offset;
		/* F**k me plenty... */
		down_write(&current->mm->mmap_sem);	
		error = do_brk(N_TXTADDR(ex), ex.a_text);
		up_write(&current->mm->mmap_sem);
		bprm->file->f_op->read(bprm->file, (char __user *)N_TXTADDR(ex),
			  ex.a_text, &pos);
		down_write(&current->mm->mmap_sem);
		error = do_brk(N_DATADDR(ex), ex.a_data);
		up_write(&current->mm->mmap_sem);
		bprm->file->f_op->read(bprm->file, (char __user *)N_DATADDR(ex),
			  ex.a_data, &pos);
		goto beyond_if;
	}

	if (N_MAGIC(ex) == OMAGIC) {
		loff_t pos = fd_offset;
		down_write(&current->mm->mmap_sem);
		do_brk(N_TXTADDR(ex) & PAGE_MASK,
			ex.a_text+ex.a_data + PAGE_SIZE - 1);
		up_write(&current->mm->mmap_sem);
		bprm->file->f_op->read(bprm->file, (char __user *)N_TXTADDR(ex),
			  ex.a_text+ex.a_data, &pos);
	} else {
		static unsigned long error_time;
		if ((ex.a_text & 0xfff || ex.a_data & 0xfff) &&
		    (N_MAGIC(ex) != NMAGIC) && (jiffies-error_time) > 5*HZ)
		{
			printk(KERN_NOTICE "executable not page aligned\n");
			error_time = jiffies;
		}

		if (!bprm->file->f_op->mmap) {
			loff_t pos = fd_offset;
			down_write(&current->mm->mmap_sem);
			do_brk(0, ex.a_text+ex.a_data);
			up_write(&current->mm->mmap_sem);
			bprm->file->f_op->read(bprm->file,
				  (char __user *)N_TXTADDR(ex),
				  ex.a_text+ex.a_data, &pos);
			goto beyond_if;
		}

	        down_write(&current->mm->mmap_sem);
		error = do_mmap(bprm->file, N_TXTADDR(ex), ex.a_text,
			PROT_READ | PROT_EXEC,
			MAP_FIXED | MAP_PRIVATE | MAP_DENYWRITE | MAP_EXECUTABLE,
			fd_offset);
	        up_write(&current->mm->mmap_sem);

		if (error != N_TXTADDR(ex)) {
			send_sig(SIGKILL, current, 0);
			return error;
		}

	        down_write(&current->mm->mmap_sem);
 		error = do_mmap(bprm->file, N_DATADDR(ex), ex.a_data,
				PROT_READ | PROT_WRITE | PROT_EXEC,
				MAP_FIXED | MAP_PRIVATE | MAP_DENYWRITE | MAP_EXECUTABLE,
				fd_offset + ex.a_text);
	        up_write(&current->mm->mmap_sem);
		if (error != N_DATADDR(ex)) {
			send_sig(SIGKILL, current, 0);
			return error;
		}
	}
beyond_if:
	set_binfmt(&aout32_format);

	set_brk(current->mm->start_brk, current->mm->brk);

	/* Make sure STACK_TOP returns the right thing.  */
	orig_thr_flags = current_thread_info()->flags;
	current_thread_info()->flags |= _TIF_32BIT;

	retval = setup_arg_pages(bprm, STACK_TOP, EXSTACK_DEFAULT);
	if (retval < 0) { 
		current_thread_info()->flags = orig_thr_flags;

		/* Someone check-me: is this error path enough? */ 
		send_sig(SIGKILL, current, 0); 
		return retval;
	}

	current->mm->start_stack =
		(unsigned long) create_aout32_tables((char __user *)bprm->p, bprm);
	tsb_context_switch(current->mm);

	start_thread32(regs, ex.a_entry, current->mm->start_stack);
	if (current->ptrace & PT_PTRACED)
		send_sig(SIGTRAP, current, 0);
	return 0;
}
コード例 #3
0
static int load_aout_library(struct file *file)
{
	struct inode * inode;
	unsigned long bss, start_addr, len;
	unsigned long error;
	int retval;
	struct exec ex;

	inode = file->f_dentry->d_inode;

	retval = -ENOEXEC;
	error = kernel_read(file, 0, (char *) &ex, sizeof(ex));
	if (error != sizeof(ex))
		goto out;

	/* We come in here for the regular a.out style of shared libraries */
	if ((N_MAGIC(ex) != ZMAGIC && N_MAGIC(ex) != QMAGIC) || N_TRSIZE(ex) ||
	    N_DRSIZE(ex) || ((ex.a_entry & 0xfff) && N_MAGIC(ex) == ZMAGIC) ||
	    inode->i_size < ex.a_text+ex.a_data+N_SYMSIZE(ex)+N_TXTOFF(ex)) {
		goto out;
	}

	if (N_FLAGS(ex))
		goto out;

	/* For  QMAGIC, the starting address is 0x20 into the page.  We mask
	   this off to get the starting address for the page */
#ifndef __arm__
	start_addr =  ex.a_entry & 0xfffff000;
#else
	start_addr = ex.a_entry & 0xffff8000;
#endif

	if ((N_TXTOFF(ex) & ~PAGE_MASK) != 0) {
		static unsigned long error_time;
		loff_t pos = N_TXTOFF(ex);

		if ((jiffies-error_time) > 5*HZ)
		{
			printk(KERN_WARNING 
			       "N_TXTOFF is not page aligned. Please convert library: %s\n",
			       file->f_dentry->d_name.name);
			error_time = jiffies;
		}

		do_brk(start_addr, ex.a_text + ex.a_data + ex.a_bss);
		
		file->f_op->read(file, (char *)start_addr,
			ex.a_text + ex.a_data, &pos);
		flush_icache_range((unsigned long) start_addr,
				   (unsigned long) start_addr + ex.a_text + ex.a_data);

		retval = 0;
		goto out;
	}
	/* Now use mmap to map the library into memory. */
	down_write(&current->mm->mmap_sem);
	error = do_mmap(file, start_addr, ex.a_text + ex.a_data,
			PROT_READ | PROT_WRITE | PROT_EXEC,
			MAP_FIXED | MAP_PRIVATE | MAP_DENYWRITE,
			N_TXTOFF(ex));
	up_write(&current->mm->mmap_sem);
	retval = error;
	if (error != start_addr)
		goto out;

	len = PAGE_ALIGN(ex.a_text + ex.a_data);
	bss = ex.a_text + ex.a_data + ex.a_bss;
	if (bss > len) {
		error = do_brk(start_addr + len, bss - len);
		retval = error;
		if (error != start_addr + len)
			goto out;
	}
	retval = 0;
out:
	return retval;
}
コード例 #4
0
static int load_aout_binary(struct linux_binprm * bprm, struct pt_regs * regs)
{
	struct exec ex;
	unsigned long error;
	unsigned long fd_offset;
	unsigned long rlim;
	int retval;

	ex = *((struct exec *) bprm->buf);		/* exec-header */
	if ((N_MAGIC(ex) != ZMAGIC && N_MAGIC(ex) != OMAGIC &&
	     N_MAGIC(ex) != QMAGIC && N_MAGIC(ex) != NMAGIC) ||
	    N_TRSIZE(ex) || N_DRSIZE(ex) ||
	    bprm->file->f_dentry->d_inode->i_size < ex.a_text+ex.a_data+N_SYMSIZE(ex)+N_TXTOFF(ex)) {
		return -ENOEXEC;
	}

	fd_offset = N_TXTOFF(ex);

	/* Check initial limits. This avoids letting people circumvent
	 * size limits imposed on them by creating programs with large
	 * arrays in the data or bss.
	 */
	rlim = current->rlim[RLIMIT_DATA].rlim_cur;
	if (rlim >= RLIM_INFINITY)
		rlim = ~0;
	if (ex.a_data + ex.a_bss > rlim)
		return -ENOMEM;

	/* Flush all traces of the currently running executable */
	retval = flush_old_exec(bprm);
	if (retval)
		return retval;

	/* OK, This is the point of no return */
#if defined(__alpha__)
	SET_AOUT_PERSONALITY(bprm, ex);
#elif defined(__sparc__)
	set_personality(PER_SUNOS);
#if !defined(__sparc_v9__)
	memcpy(&current->thread.core_exec, &ex, sizeof(struct exec));
#endif
#else
	set_personality(PER_LINUX);
#endif

	current->mm->end_code = ex.a_text +
		(current->mm->start_code = N_TXTADDR(ex));
	current->mm->end_data = ex.a_data +
		(current->mm->start_data = N_DATADDR(ex));
	current->mm->brk = ex.a_bss +
		(current->mm->start_brk = N_BSSADDR(ex));

	current->mm->rss = 0;
	current->mm->mmap = NULL;

#ifdef CONFIG_ARM_FASS
	arch_new_mm(current, current->mm);
#endif

	compute_creds(bprm);
 	current->flags &= ~PF_FORKNOEXEC;
#ifdef __sparc__
	if (N_MAGIC(ex) == NMAGIC) {
		loff_t pos = fd_offset;
		/* F**k me plenty... */
		/* <AOL></AOL> */
		error = do_brk(N_TXTADDR(ex), ex.a_text);
		bprm->file->f_op->read(bprm->file, (char *) N_TXTADDR(ex),
			  ex.a_text, &pos);
		error = do_brk(N_DATADDR(ex), ex.a_data);
		bprm->file->f_op->read(bprm->file, (char *) N_DATADDR(ex),
			  ex.a_data, &pos);
		goto beyond_if;
	}
#endif

	if (N_MAGIC(ex) == OMAGIC) {
		unsigned long text_addr, map_size;
		loff_t pos;

		text_addr = N_TXTADDR(ex);

#if defined(__alpha__) || defined(__sparc__)
		pos = fd_offset;
		map_size = ex.a_text+ex.a_data + PAGE_SIZE - 1;
#else
		pos = 32;
		map_size = ex.a_text+ex.a_data;
#endif

		error = do_brk(text_addr & PAGE_MASK, map_size);
		if (error != (text_addr & PAGE_MASK)) {
			send_sig(SIGKILL, current, 0);
			return error;
		}

		error = bprm->file->f_op->read(bprm->file, (char *)text_addr,
			  ex.a_text+ex.a_data, &pos);
		if ((signed long)error < 0) {
			send_sig(SIGKILL, current, 0);
			return error;
		}
			 
		flush_icache_range(text_addr, text_addr+ex.a_text+ex.a_data);
	} else {
		static unsigned long error_time, error_time2;
		if ((ex.a_text & 0xfff || ex.a_data & 0xfff) &&
		    (N_MAGIC(ex) != NMAGIC) && (jiffies-error_time2) > 5*HZ)
		{
			printk(KERN_NOTICE "executable not page aligned\n");
			error_time2 = jiffies;
		}

		if ((fd_offset & ~PAGE_MASK) != 0 &&
		    (jiffies-error_time) > 5*HZ)
		{
			printk(KERN_WARNING 
			       "fd_offset is not page aligned. Please convert program: %s\n",
			       bprm->file->f_dentry->d_name.name);
			error_time = jiffies;
		}

		if (!bprm->file->f_op->mmap||((fd_offset & ~PAGE_MASK) != 0)) {
			loff_t pos = fd_offset;
			do_brk(N_TXTADDR(ex), ex.a_text+ex.a_data);
			bprm->file->f_op->read(bprm->file,(char *)N_TXTADDR(ex),
					ex.a_text+ex.a_data, &pos);
			flush_icache_range((unsigned long) N_TXTADDR(ex),
					   (unsigned long) N_TXTADDR(ex) +
					   ex.a_text+ex.a_data);
			goto beyond_if;
		}

		down_write(&current->mm->mmap_sem);
		error = do_mmap(bprm->file, N_TXTADDR(ex), ex.a_text,
			PROT_READ | PROT_EXEC,
			MAP_FIXED | MAP_PRIVATE | MAP_DENYWRITE | MAP_EXECUTABLE,
			fd_offset);
		up_write(&current->mm->mmap_sem);

		if (error != N_TXTADDR(ex)) {
			send_sig(SIGKILL, current, 0);
			return error;
		}

		down_write(&current->mm->mmap_sem);
 		error = do_mmap(bprm->file, N_DATADDR(ex), ex.a_data,
				PROT_READ | PROT_WRITE | PROT_EXEC,
				MAP_FIXED | MAP_PRIVATE | MAP_DENYWRITE | MAP_EXECUTABLE,
				fd_offset + ex.a_text);
		up_write(&current->mm->mmap_sem);
		if (error != N_DATADDR(ex)) {
			send_sig(SIGKILL, current, 0);
			return error;
		}
	}
beyond_if:
	set_binfmt(&aout_format);

	set_brk(current->mm->start_brk, current->mm->brk);

	retval = setup_arg_pages(bprm); 
	if (retval < 0) { 
		/* Someone check-me: is this error path enough? */ 
		send_sig(SIGKILL, current, 0); 
		return retval;
	}

	current->mm->start_stack =
		(unsigned long) create_aout_tables((char *) bprm->p, bprm);
#ifdef __alpha__
	regs->gp = ex.a_gpvalue;
#endif
	start_thread(regs, ex.a_entry, current->mm->start_stack);
	if (current->ptrace & PT_PTRACED)
		send_sig(SIGTRAP, current, 0);
#ifndef __arm__
	return 0;
#else
	return regs->ARM_r0;
#endif
}
コード例 #5
0
static inline int
do_load_aout_library(int fd)
{
        struct file * file;
	struct exec ex;
	struct  inode * inode;
	unsigned int len;
	unsigned int bss;
	unsigned int start_addr;
	unsigned long error;
	
	file = current->files->fd[fd];
	inode = file->f_inode;
	
	if (!file || !file->f_op)
		return -EACCES;

	/* Seek into the file */
	if (file->f_op->lseek) {
		if ((error = file->f_op->lseek(inode, file, 0, 0)) != 0)
			return -ENOEXEC;
	} else
		file->f_pos = 0;

	set_fs(KERNEL_DS);
	error = file->f_op->read(inode, file, (char *) &ex, sizeof(ex));
	set_fs(USER_DS);
	if (error != sizeof(ex))
		return -ENOEXEC;

	/* We come in here for the regular a.out style of shared libraries */
	if ((N_MAGIC(ex) != ZMAGIC && N_MAGIC(ex) != QMAGIC) || N_TRSIZE(ex) ||
	    N_DRSIZE(ex) || ((ex.a_entry & 0xfff) && N_MAGIC(ex) == ZMAGIC) ||
	    inode->i_size < ex.a_text+ex.a_data+N_SYMSIZE(ex)+N_TXTOFF(ex)) {
		return -ENOEXEC;
	}
	if (N_MAGIC(ex) == ZMAGIC && N_TXTOFF(ex) && 
	    (N_TXTOFF(ex) < inode->i_sb->s_blocksize)) {
		printk("N_TXTOFF < BLOCK_SIZE. Please convert library\n");
		return -ENOEXEC;
	}
	
	if (N_FLAGS(ex)) return -ENOEXEC;

	/* For  QMAGIC, the starting address is 0x20 into the page.  We mask
	   this off to get the starting address for the page */

#ifndef CONFIG_ARM
	start_addr =  ex.a_entry & 0xfffff000;

	/* Now use mmap to map the library into memory. */
	error = do_mmap(file, start_addr, ex.a_text + ex.a_data,
			PROT_READ | PROT_WRITE | PROT_EXEC,
			MAP_FIXED | MAP_PRIVATE | MAP_DENYWRITE,
			N_TXTOFF(ex));
	if (error != start_addr)
		return error;
	len = PAGE_ALIGN(ex.a_text + ex.a_data);
	bss = ex.a_text + ex.a_data + ex.a_bss;
#else
	start_addr = ex.a_entry & 0xffff8000;
	{
		unsigned int offset;
		unsigned int length;

		switch (N_MAGIC(ex)) {
		case QMAGIC:
			offset = 0;
			length = ex.a_text + ex.a_data;
			break;
		case ZMAGIC: /* or QMAGIC */
			offset = N_TXTOFF(ex);
			length = ex.a_text + ex.a_data;
			break;
		default:
			return -ENOEXEC;
		}
		/* Now use mmap to map the library into memory. */
		error = do_mmap(file, start_addr, length,
				PROT_READ | PROT_WRITE | PROT_EXEC,
				MAP_FIXED | MAP_PRIVATE | MAP_DENYWRITE,
				offset);
		if (error != start_addr)
			return error;
		len = PAGE_ALIGN(length);
		bss = length + ex.a_bss;
	}
#endif
	if (bss > len) {
		error = do_mmap(NULL, start_addr + len, bss-len,
				PROT_READ|PROT_WRITE|PROT_EXEC,
				MAP_PRIVATE|MAP_FIXED, 0);
		if (error != start_addr + len)
			return error;
	}
	return 0;
}
コード例 #6
0
static inline int
do_load_aout_binary(struct linux_binprm * bprm, struct pt_regs * regs)
{
	struct exec ex;
	struct file * file;
	int fd;
	unsigned long error;
	unsigned long p = bprm->p;
	unsigned long fd_offset;
	unsigned long rlim;

	ex = *((struct exec *) bprm->buf);		/* exec-header */
	if ((N_MAGIC(ex) != ZMAGIC && N_MAGIC(ex) != OMAGIC && 
	     N_MAGIC(ex) != QMAGIC) ||
	    N_TRSIZE(ex) || N_DRSIZE(ex) ||
	    bprm->inode->i_size < ex.a_text+ex.a_data+N_SYMSIZE(ex)+N_TXTOFF(ex)) {
		return -ENOEXEC;
	}

	current->personality = PER_LINUX;
	fd_offset = N_TXTOFF(ex);

#if defined (__i386__) || defined (CONFIG_ARM)
	if (N_MAGIC(ex) == ZMAGIC && fd_offset != BLOCK_SIZE) {
		printk(KERN_NOTICE "N_TXTOFF != BLOCK_SIZE. See a.out.h.\n");
		return -ENOEXEC;
	}

	if (N_MAGIC(ex) == ZMAGIC && ex.a_text &&
	    (fd_offset < bprm->inode->i_sb->s_blocksize)) {
		printk(KERN_NOTICE "N_TXTOFF < BLOCK_SIZE. Please convert binary.\n");
		return -ENOEXEC;
	}
#endif
#if defined(CONFIG_ARM)
	if (N_MACHTYPE(ex) != M_ARM) {
		printk(KERN_NOTICE "Binary != ARM.  Please recompile binary.\n");
		return -ENOEXEC;
	}
#endif

	/* Check initial limits. This avoids letting people circumvent
	 * size limits imposed on them by creating programs with large
	 * arrays in the data or bss.
	 */
	rlim = current->rlim[RLIMIT_DATA].rlim_cur;
	if (rlim >= RLIM_INFINITY)
		rlim = ~0;
	if (ex.a_data + ex.a_bss > rlim)
		return -ENOMEM;

	if (flush_old_exec(bprm))
		return -ENOMEM;

	/* OK, This is the point of no return */

	current->mm->end_code = ex.a_text +
		(current->mm->start_code = N_TXTADDR(ex));
	current->mm->end_data = ex.a_data +
		(current->mm->start_data = N_DATADDR(ex));
	current->mm->brk = ex.a_bss +
		(current->mm->start_brk = N_BSSADDR(ex));

	current->mm->rss = 0;
	current->mm->mmap = NULL;
	current->suid = current->euid = current->fsuid = bprm->e_uid;
	current->sgid = current->egid = current->fsgid = bprm->e_gid;
 	current->flags &= ~PF_FORKNOEXEC;
	if (N_MAGIC(ex) == OMAGIC) {
#if defined(__alpha__) || defined(CONFIG_ARM)
#ifndef CONFIG_ARM
		do_mmap(NULL, N_TXTADDR(ex) & PAGE_MASK,
			ex.a_text+ex.a_data + PAGE_SIZE - 1,
			PROT_READ|PROT_WRITE|PROT_EXEC,
			MAP_FIXED|MAP_PRIVATE, 0);
#else
		do_mmap(NULL, N_TXTADDR(ex),
			ex.a_text+ex.a_data,
			PROT_READ|PROT_WRITE|PROT_EXEC,
			MAP_FIXED|MAP_PRIVATE, 0);
#endif
		read_exec(bprm->inode, fd_offset, (char *) N_TXTADDR(ex),
			  ex.a_text+ex.a_data, 0);
#else
		do_mmap(NULL, 0, ex.a_text+ex.a_data,
			PROT_READ|PROT_WRITE|PROT_EXEC,
			MAP_FIXED|MAP_PRIVATE, 0);
		read_exec(bprm->inode, 32, (char *) 0, ex.a_text+ex.a_data, 0);
#endif
	} else {
		if (ex.a_text & 0xfff || ex.a_data & 0xfff)
			printk(KERN_NOTICE "executable not page aligned\n");
		
		fd = open_inode(bprm->inode, O_RDONLY);
		
		if (fd < 0) {
			send_sig(SIGKILL, current, 0);
			return fd;
		}
		file = current->files->fd[fd];
		if (!file->f_op || !file->f_op->mmap) {
			sys_close(fd);
			do_mmap(NULL, 0, ex.a_text+ex.a_data,
				PROT_READ|PROT_WRITE|PROT_EXEC,
				MAP_FIXED|MAP_PRIVATE, 0);
			read_exec(bprm->inode, fd_offset,
				  (char *) N_TXTADDR(ex), ex.a_text+ex.a_data, 0);
			goto beyond_if;
		}

		error = do_mmap(file, N_TXTADDR(ex), ex.a_text,
			PROT_READ | PROT_EXEC,
			MAP_FIXED | MAP_PRIVATE | MAP_DENYWRITE | MAP_EXECUTABLE,
			fd_offset);

		if (error != N_TXTADDR(ex)) {
			sys_close(fd);
			send_sig(SIGKILL, current, 0);
			return error;
		}
		
 		error = do_mmap(file, N_DATADDR(ex), ex.a_data,
				PROT_READ | PROT_WRITE | PROT_EXEC,
				MAP_FIXED | MAP_PRIVATE | MAP_DENYWRITE | MAP_EXECUTABLE,
				fd_offset + ex.a_text);
		sys_close(fd);
		if (error != N_DATADDR(ex)) {
			send_sig(SIGKILL, current, 0);
			return error;
		}
	}
beyond_if:
	if (current->exec_domain && current->exec_domain->use_count)
		(*current->exec_domain->use_count)--;
	if (current->binfmt && current->binfmt->use_count)
		(*current->binfmt->use_count)--;
	current->exec_domain = lookup_exec_domain(current->personality);
	current->binfmt = &aout_format;
	if (current->exec_domain && current->exec_domain->use_count)
		(*current->exec_domain->use_count)++;
	if (current->binfmt && current->binfmt->use_count)
		(*current->binfmt->use_count)++;

	set_brk(current->mm->start_brk, current->mm->brk);

	p = setup_arg_pages(p, bprm);
	
	p = (unsigned long) create_aout_tables((char *)p, bprm);
	current->mm->start_stack = p;
#ifdef __alpha__
	regs->gp = ex.a_gpvalue;
#endif
	start_thread(regs, ex.a_entry, p);
	if (current->flags & PF_PTRACED)
		send_sig(SIGTRAP, current, 0);
#ifndef CONFIG_ARM
	return 0;
#else
	return regs->ARM_r0;
#endif
}