blob: 8f774c25b7653295e60d1c0e83100b072881683c [file] [log] [blame]
Jeff Dike1d3468a2006-07-10 04:45:13 -07001/*
Linus Torvalds1da177e2005-04-16 15:20:36 -07002 * 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"
Alexey Dobriyan4e950f62007-07-30 02:36:13 +04009#include "linux/fs.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070010#include "asm/ptrace.h"
11#include "asm/pgtable.h"
12#include "asm/tlbflush.h"
13#include "asm/uaccess.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070014#include "kern_util.h"
Jeff Dike4ff83ce2007-05-06 14:51:08 -070015#include "as-layout.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070016#include "mem_user.h"
17#include "kern.h"
18#include "irq_user.h"
19#include "tlb.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070020#include "os.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070021#include "mode_kern.h"
22
23void flush_thread(void)
24{
Paolo 'Blaisorblade' Giarrussoaa6758d2006-03-31 02:30:22 -080025 arch_flush_thread(&current->thread.arch);
Jeff Dike6aa802c2007-10-16 01:26:56 -070026 flush_thread_skas();
Linus Torvalds1da177e2005-04-16 15:20:36 -070027}
28
29void start_thread(struct pt_regs *regs, unsigned long eip, unsigned long esp)
30{
Jeff Dike6aa802c2007-10-16 01:26:56 -070031 start_thread_skas(regs, eip, esp);
Linus Torvalds1da177e2005-04-16 15:20:36 -070032}
33
Jeff Dike1d3468a2006-07-10 04:45:13 -070034#ifdef CONFIG_TTY_LOG
35extern void log_exec(char **argv, void *tty);
36#endif
37
Linus Torvalds1da177e2005-04-16 15:20:36 -070038static long execve1(char *file, char __user * __user *argv,
Paolo 'Blaisorblade' Giarrusso42947cb2006-02-01 03:06:29 -080039 char __user *__user *env)
Linus Torvalds1da177e2005-04-16 15:20:36 -070040{
41 long error;
Jeff Dikef9795222007-02-10 01:44:03 -080042#ifdef CONFIG_TTY_LOG
Peter Zijlstra24ec8392006-12-08 02:36:04 -080043 struct tty_struct *tty;
Linus Torvalds1da177e2005-04-16 15:20:36 -070044
Alan Coxb1fc0b12006-09-25 23:33:08 -070045 mutex_lock(&tty_mutex);
Peter Zijlstra24ec8392006-12-08 02:36:04 -080046 tty = get_current_tty();
47 if (tty)
48 log_exec(argv, tty);
Alan Coxb1fc0b12006-09-25 23:33:08 -070049 mutex_unlock(&tty_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -070050#endif
51 error = do_execve(file, argv, env, &current->thread.regs);
52 if (error == 0){
53 task_lock(current);
54 current->ptrace &= ~PT_DTRACE;
Jeff Dike1d3468a2006-07-10 04:45:13 -070055#ifdef SUBARCH_EXECVE1
56 SUBARCH_EXECVE1(&current->thread.regs.regs);
57#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -070058 task_unlock(current);
Linus Torvalds1da177e2005-04-16 15:20:36 -070059 }
60 return(error);
61}
62
63long um_execve(char *file, char __user *__user *argv, char __user *__user *env)
64{
65 long err;
66
67 err = execve1(file, argv, env);
68 if(!err)
69 do_longjmp(current->thread.exec_buf, 1);
70 return(err);
71}
72
Al Viro4d338e12006-03-31 02:30:15 -080073long sys_execve(char __user *file, char __user *__user *argv,
Linus Torvalds1da177e2005-04-16 15:20:36 -070074 char __user *__user *env)
75{
76 long error;
77 char *filename;
78
79 lock_kernel();
Al Viro4d338e12006-03-31 02:30:15 -080080 filename = getname(file);
Linus Torvalds1da177e2005-04-16 15:20:36 -070081 error = PTR_ERR(filename);
82 if (IS_ERR(filename)) goto out;
83 error = execve1(filename, argv, env);
84 putname(filename);
85 out:
86 unlock_kernel();
87 return(error);
88}