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/arch/um/kernel/exec_kern.c

https://bitbucket.org/evzijst/gittest
C | 91 lines | 66 code | 11 blank | 14 comment | 4 complexity | 6e7a5109b6f1ec47a9076bde1c1da394 MD5 | raw file
 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 "user_util.h"
14#include "kern_util.h"
15#include "mem_user.h"
16#include "kern.h"
17#include "irq_user.h"
18#include "tlb.h"
19#include "2_5compat.h"
20#include "os.h"
21#include "time_user.h"
22#include "choose-mode.h"
23#include "mode_kern.h"
24
25void flush_thread(void)
26{
27	CHOOSE_MODE(flush_thread_tt(), flush_thread_skas());
28}
29
30void start_thread(struct pt_regs *regs, unsigned long eip, unsigned long esp)
31{
32	CHOOSE_MODE_PROC(start_thread_tt, start_thread_skas, regs, eip, esp);
33}
34
35extern void log_exec(char **argv, void *tty);
36
37static long execve1(char *file, char __user * __user *argv,
38		    char *__user __user *env)
39{
40        long error;
41
42#ifdef CONFIG_TTY_LOG
43	log_exec(argv, current->tty);
44#endif
45        error = do_execve(file, argv, env, &current->thread.regs);
46        if (error == 0){
47		task_lock(current);
48                current->ptrace &= ~PT_DTRACE;
49		task_unlock(current);
50                set_cmdline(current_cmd());
51        }
52        return(error);
53}
54
55long um_execve(char *file, char __user *__user *argv, char __user *__user *env)
56{
57	long err;
58
59	err = execve1(file, argv, env);
60	if(!err)
61		do_longjmp(current->thread.exec_buf, 1);
62	return(err);
63}
64
65long sys_execve(char *file, char __user *__user *argv,
66		char __user *__user *env)
67{
68	long error;
69	char *filename;
70
71	lock_kernel();
72	filename = getname((char __user *) file);
73	error = PTR_ERR(filename);
74	if (IS_ERR(filename)) goto out;
75	error = execve1(filename, argv, env);
76	putname(filename);
77 out:
78	unlock_kernel();
79	return(error);
80}
81
82/*
83 * Overrides for Emacs so that we follow Linus's tabbing style.
84 * Emacs will notice this stuff at the end of the file and automatically
85 * adjust the settings for this buffer only.  This must remain at the end
86 * of the file.
87 * ---------------------------------------------------------------------------
88 * Local variables:
89 * c-file-style: "linux"
90 * End:
91 */