1/*
2 * Copyright (C) 2000, 2001 Jeff Dike (jdike@karaya.com)
3 * Licensed under the GPL
4 */
5
6#include "linux/slab.h"
7#include "linux/smp_lock.h"
8#include "linux/ptrace.h"
9#include "asm/ptrace.h"
10#include "asm/pgtable.h"
11#include "asm/tlbflush.h"
12#include "asm/uaccess.h"
13#include "kern_util.h"
14#include "as-layout.h"
15#include "mem_user.h"
16#include "kern.h"
17#include "irq_user.h"
18#include "tlb.h"
19#include "os.h"
20#include "choose-mode.h"
21#include "mode_kern.h"
22
23void flush_thread(void)
24{
25	arch_flush_thread(&current->thread.arch);
26	CHOOSE_MODE(flush_thread_tt(), flush_thread_skas());
27}
28
29void start_thread(struct pt_regs *regs, unsigned long eip, unsigned long esp)
30{
31	CHOOSE_MODE_PROC(start_thread_tt, start_thread_skas, regs, eip, esp);
32}
33
34#ifdef CONFIG_TTY_LOG
35extern void log_exec(char **argv, void *tty);
36#endif
37
38static long execve1(char *file, char __user * __user *argv,
39		    char __user *__user *env)
40{
41        long error;
42#ifdef CONFIG_TTY_LOG
43	struct tty_struct *tty;
44
45	mutex_lock(&tty_mutex);
46	tty = get_current_tty();
47	if (tty)
48		log_exec(argv, tty);
49	mutex_unlock(&tty_mutex);
50#endif
51        error = do_execve(file, argv, env, &current->thread.regs);
52        if (error == 0){
53		task_lock(current);
54                current->ptrace &= ~PT_DTRACE;
55#ifdef SUBARCH_EXECVE1
56		SUBARCH_EXECVE1(&current->thread.regs.regs);
57#endif
58		task_unlock(current);
59                set_cmdline(current_cmd());
60        }
61        return(error);
62}
63
64long um_execve(char *file, char __user *__user *argv, char __user *__user *env)
65{
66	long err;
67
68	err = execve1(file, argv, env);
69	if(!err)
70		do_longjmp(current->thread.exec_buf, 1);
71	return(err);
72}
73
74long sys_execve(char __user *file, char __user *__user *argv,
75		char __user *__user *env)
76{
77	long error;
78	char *filename;
79
80	lock_kernel();
81	filename = getname(file);
82	error = PTR_ERR(filename);
83	if (IS_ERR(filename)) goto out;
84	error = execve1(filename, argv, env);
85	putname(filename);
86 out:
87	unlock_kernel();
88	return(error);
89}
90