arch/um/kernel/exec_kern.c

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